#include "mongoose.h" #ifdef MG_MODULE_LINES #line 1 "./src/internal.h" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef CS_MONGOOSE_SRC_INTERNAL_H_ #define CS_MONGOOSE_SRC_INTERNAL_H_ #ifndef MG_MALLOC #define MG_MALLOC malloc #endif #ifndef MG_CALLOC #define MG_CALLOC calloc #endif #ifndef MG_REALLOC #define MG_REALLOC realloc #endif #ifndef MG_FREE #define MG_FREE free #endif #ifndef MBUF_REALLOC #define MBUF_REALLOC MG_REALLOC #endif #ifndef MBUF_FREE #define MBUF_FREE MG_FREE #endif #define MG_SET_PTRPTR(_ptr, _v) \ do { \ if (_ptr) *(_ptr) = _v; \ } while (0) #ifndef MG_INTERNAL #define MG_INTERNAL static #endif #ifdef PICOTCP #define NO_LIBC #define MG_DISABLE_FILESYSTEM #define MG_DISABLE_POPEN #define MG_DISABLE_CGI #define MG_DISABLE_DIRECTORY_LISTING #define MG_DISABLE_SOCKETPAIR #define MG_DISABLE_PFS #endif /* Amalgamated: #include "mongoose/src/net.h" */ /* Amalgamated: #include "mongoose/src/http.h" */ /* Amalgamated: #include "common/cs_dbg.h" */ #define MG_CTL_MSG_MESSAGE_SIZE 8192 /* internals that need to be accessible in unit tests */ MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc, int proto, union socket_address *sa); MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa, int *proto, char *host, size_t host_len); MG_INTERNAL void mg_call(struct mg_connection *nc, mg_event_handler_t ev_handler, int ev, void *ev_data); void mg_forward(struct mg_connection *from, struct mg_connection *to); MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c); MG_INTERNAL void mg_remove_conn(struct mg_connection *c); MG_INTERNAL struct mg_connection *mg_create_connection( struct mg_mgr *mgr, mg_event_handler_t callback, struct mg_add_sock_opts opts); #ifndef MG_DISABLE_FILESYSTEM MG_INTERNAL int mg_uri_to_local_path(struct http_message *hm, const struct mg_serve_http_opts *opts, char **local_path, struct mg_str *remainder); #endif #ifdef _WIN32 /* Retur value is the same as for MultiByteToWideChar. */ int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len); #endif /* * Reassemble the content of the buffer (buf, blen) which should be * in the HTTP chunked encoding, by collapsing data chunks to the * beginning of the buffer. * * If chunks get reassembled, modify hm->body to point to the reassembled * body and fire MG_EV_HTTP_CHUNK event. If handler sets MG_F_DELETE_CHUNK * in nc->flags, delete reassembled body from the mbuf. * * Return reassembled body size. */ MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc, struct http_message *hm, char *buf, size_t blen); #ifndef MG_DISABLE_FILESYSTEM MG_INTERNAL time_t mg_parse_date_string(const char *datetime); MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st); #endif struct ctl_msg { mg_event_handler_t callback; char message[MG_CTL_MSG_MESSAGE_SIZE]; }; #ifndef MG_DISABLE_MQTT struct mg_mqtt_message; MG_INTERNAL int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm); #endif /* Forward declarations for testing. */ extern void *(*test_malloc)(size_t size); extern void *(*test_calloc)(size_t count, size_t size); #endif /* CS_MONGOOSE_SRC_INTERNAL_H_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_dbg.h" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #ifndef CS_COMMON_CS_DBG_H_ #define CS_COMMON_CS_DBG_H_ #ifndef CS_DISABLE_STDIO #include #endif #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ enum cs_log_level { LL_NONE = -1, LL_ERROR = 0, LL_WARN = 1, LL_INFO = 2, LL_DEBUG = 3, LL_VERBOSE_DEBUG = 4, _LL_MIN = -2, _LL_MAX = 5, }; void cs_log_set_level(enum cs_log_level level); #ifndef CS_DISABLE_STDIO void cs_log_set_file(FILE *file); extern enum cs_log_level cs_log_level; void cs_log_print_prefix(const char *func); void cs_log_printf(const char *fmt, ...); #define LOG(l, x) \ if (cs_log_level >= l) { \ cs_log_print_prefix(__func__); \ cs_log_printf x; \ } #ifndef CS_NDEBUG #define DBG(x) \ if (cs_log_level >= LL_VERBOSE_DEBUG) { \ cs_log_print_prefix(__func__); \ cs_log_printf x; \ } #else /* NDEBUG */ #define DBG(x) #endif #else /* CS_DISABLE_STDIO */ #define LOG(l, x) #define DBG(x) #endif #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* CS_COMMON_CS_DBG_H_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_dbg.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "common/cs_dbg.h" */ #include #include /* Amalgamated: #include "common/cs_time.h" */ enum cs_log_level cs_log_level = #ifdef CS_ENABLE_DEBUG LL_VERBOSE_DEBUG; #else LL_ERROR; #endif #ifndef CS_DISABLE_STDIO FILE *cs_log_file = NULL; #ifdef CS_LOG_TS_DIFF double cs_log_ts; #endif void cs_log_print_prefix(const char *func) { if (cs_log_file == NULL) cs_log_file = stderr; fprintf(cs_log_file, "%-20s ", func); #ifdef CS_LOG_TS_DIFF { double now = cs_time(); fprintf(cs_log_file, "%7u ", (unsigned int) ((now - cs_log_ts) * 1000000)); cs_log_ts = now; } #endif } void cs_log_printf(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(cs_log_file, fmt, ap); va_end(ap); fputc('\n', cs_log_file); fflush(cs_log_file); } void cs_log_set_file(FILE *file) { cs_log_file = file; } #endif /* !CS_DISABLE_STDIO */ void cs_log_set_level(enum cs_log_level level) { cs_log_level = level; #if defined(CS_LOG_TS_DIFF) && !defined(CS_DISABLE_STDIO) cs_log_ts = cs_time(); #endif } #ifdef MG_MODULE_LINES #line 1 "./src/../../common/base64.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef EXCLUDE_COMMON /* Amalgamated: #include "common/base64.h" */ #include /* ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ */ #define NUM_UPPERCASES ('Z' - 'A' + 1) #define NUM_LETTERS (NUM_UPPERCASES * 2) #define NUM_DIGITS ('9' - '0' + 1) /* * Emit a base64 code char. * * Doesn't use memory, thus it's safe to use to safely dump memory in crashdumps */ static void cs_base64_emit_code(struct cs_base64_ctx *ctx, int v) { if (v < NUM_UPPERCASES) { ctx->b64_putc(v + 'A', ctx->user_data); } else if (v < (NUM_LETTERS)) { ctx->b64_putc(v - NUM_UPPERCASES + 'a', ctx->user_data); } else if (v < (NUM_LETTERS + NUM_DIGITS)) { ctx->b64_putc(v - NUM_LETTERS + '0', ctx->user_data); } else { ctx->b64_putc(v - NUM_LETTERS - NUM_DIGITS == 0 ? '+' : '/', ctx->user_data); } } static void cs_base64_emit_chunk(struct cs_base64_ctx *ctx) { int a, b, c; a = ctx->chunk[0]; b = ctx->chunk[1]; c = ctx->chunk[2]; cs_base64_emit_code(ctx, a >> 2); cs_base64_emit_code(ctx, ((a & 3) << 4) | (b >> 4)); if (ctx->chunk_size > 1) { cs_base64_emit_code(ctx, (b & 15) << 2 | (c >> 6)); } if (ctx->chunk_size > 2) { cs_base64_emit_code(ctx, c & 63); } } void cs_base64_init(struct cs_base64_ctx *ctx, cs_base64_putc_t b64_putc, void *user_data) { ctx->chunk_size = 0; ctx->b64_putc = b64_putc; ctx->user_data = user_data; } void cs_base64_update(struct cs_base64_ctx *ctx, const char *str, size_t len) { const unsigned char *src = (const unsigned char *) str; size_t i; for (i = 0; i < len; i++) { ctx->chunk[ctx->chunk_size++] = src[i]; if (ctx->chunk_size == 3) { cs_base64_emit_chunk(ctx); ctx->chunk_size = 0; } } } void cs_base64_finish(struct cs_base64_ctx *ctx) { if (ctx->chunk_size > 0) { int i; memset(&ctx->chunk[ctx->chunk_size], 0, 3 - ctx->chunk_size); cs_base64_emit_chunk(ctx); for (i = 0; i < (3 - ctx->chunk_size); i++) { ctx->b64_putc('=', ctx->user_data); } } } #define BASE64_ENCODE_BODY \ static const char *b64 = \ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; \ int i, j, a, b, c; \ \ for (i = j = 0; i < src_len; i += 3) { \ a = src[i]; \ b = i + 1 >= src_len ? 0 : src[i + 1]; \ c = i + 2 >= src_len ? 0 : src[i + 2]; \ \ BASE64_OUT(b64[a >> 2]); \ BASE64_OUT(b64[((a & 3) << 4) | (b >> 4)]); \ if (i + 1 < src_len) { \ BASE64_OUT(b64[(b & 15) << 2 | (c >> 6)]); \ } \ if (i + 2 < src_len) { \ BASE64_OUT(b64[c & 63]); \ } \ } \ \ while (j % 4 != 0) { \ BASE64_OUT('='); \ } \ BASE64_FLUSH() #define BASE64_OUT(ch) \ do { \ dst[j++] = (ch); \ } while (0) #define BASE64_FLUSH() \ do { \ dst[j++] = '\0'; \ } while (0) void cs_base64_encode(const unsigned char *src, int src_len, char *dst) { BASE64_ENCODE_BODY; } #undef BASE64_OUT #undef BASE64_FLUSH #ifndef CS_DISABLE_STDIO #define BASE64_OUT(ch) \ do { \ fprintf(f, "%c", (ch)); \ j++; \ } while (0) #define BASE64_FLUSH() void cs_fprint_base64(FILE *f, const unsigned char *src, int src_len) { BASE64_ENCODE_BODY; } #undef BASE64_OUT #undef BASE64_FLUSH #endif /* !CS_DISABLE_STDIO */ /* Convert one byte of encoded base64 input stream to 6-bit chunk */ static unsigned char from_b64(unsigned char ch) { /* Inverse lookup map */ static const unsigned char tab[128] = { 255, 255, 255, 255, 255, 255, 255, 255, /* 0 */ 255, 255, 255, 255, 255, 255, 255, 255, /* 8 */ 255, 255, 255, 255, 255, 255, 255, 255, /* 16 */ 255, 255, 255, 255, 255, 255, 255, 255, /* 24 */ 255, 255, 255, 255, 255, 255, 255, 255, /* 32 */ 255, 255, 255, 62, 255, 255, 255, 63, /* 40 */ 52, 53, 54, 55, 56, 57, 58, 59, /* 48 */ 60, 61, 255, 255, 255, 200, 255, 255, /* 56 '=' is 200, on index 61 */ 255, 0, 1, 2, 3, 4, 5, 6, /* 64 */ 7, 8, 9, 10, 11, 12, 13, 14, /* 72 */ 15, 16, 17, 18, 19, 20, 21, 22, /* 80 */ 23, 24, 25, 255, 255, 255, 255, 255, /* 88 */ 255, 26, 27, 28, 29, 30, 31, 32, /* 96 */ 33, 34, 35, 36, 37, 38, 39, 40, /* 104 */ 41, 42, 43, 44, 45, 46, 47, 48, /* 112 */ 49, 50, 51, 255, 255, 255, 255, 255, /* 120 */ }; return tab[ch & 127]; } int cs_base64_decode(const unsigned char *s, int len, char *dst) { unsigned char a, b, c, d; int orig_len = len; while (len >= 4 && (a = from_b64(s[0])) != 255 && (b = from_b64(s[1])) != 255 && (c = from_b64(s[2])) != 255 && (d = from_b64(s[3])) != 255) { s += 4; len -= 4; if (a == 200 || b == 200) break; /* '=' can't be there */ *dst++ = a << 2 | b >> 4; if (c == 200) break; *dst++ = b << 4 | c >> 2; if (d == 200) break; *dst++ = c << 6 | d; } *dst = 0; return orig_len - len; } #endif /* EXCLUDE_COMMON */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_dirent.h" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #ifndef CS_COMMON_CS_DIRENT_H_ #define CS_COMMON_CS_DIRENT_H_ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ #ifdef CS_ENABLE_SPIFFS #include typedef struct { spiffs_DIR dh; struct spiffs_dirent de; } DIR; #define d_name name #define dirent spiffs_dirent int rmdir(const char *path); int mkdir(const char *path, mode_t mode); #endif #if defined(_WIN32) struct dirent { char d_name[MAX_PATH]; }; typedef struct DIR { HANDLE handle; WIN32_FIND_DATAW info; struct dirent result; } DIR; #endif #if defined(_WIN32) || defined(CS_ENABLE_SPIFFS) DIR *opendir(const char *dir_name); int closedir(DIR *dir); struct dirent *readdir(DIR *dir); #endif #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* CS_COMMON_CS_DIRENT_H_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_dirent.c" #endif /* * Copyright (c) 2015 Cesanta Software Limited * All rights reserved */ #ifndef EXCLUDE_COMMON /* Amalgamated: #include "common/cs_dirent.h" */ /* * This file contains POSIX opendir/closedir/readdir API implementation * for systems which do not natively support it (e.g. Windows). */ #ifndef MG_FREE #define MG_FREE free #endif #ifndef MG_MALLOC #define MG_MALLOC malloc #endif #ifdef _WIN32 DIR *opendir(const char *name) { DIR *dir = NULL; wchar_t wpath[MAX_PATH]; DWORD attrs; if (name == NULL) { SetLastError(ERROR_BAD_ARGUMENTS); } else if ((dir = (DIR *) MG_MALLOC(sizeof(*dir))) == NULL) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); } else { to_wchar(name, wpath, ARRAY_SIZE(wpath)); attrs = GetFileAttributesW(wpath); if (attrs != 0xFFFFFFFF && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { (void) wcscat(wpath, L"\\*"); dir->handle = FindFirstFileW(wpath, &dir->info); dir->result.d_name[0] = '\0'; } else { MG_FREE(dir); dir = NULL; } } return dir; } int closedir(DIR *dir) { int result = 0; if (dir != NULL) { if (dir->handle != INVALID_HANDLE_VALUE) result = FindClose(dir->handle) ? 0 : -1; MG_FREE(dir); } else { result = -1; SetLastError(ERROR_BAD_ARGUMENTS); } return result; } struct dirent *readdir(DIR *dir) { struct dirent *result = NULL; if (dir) { if (dir->handle != INVALID_HANDLE_VALUE) { result = &dir->result; (void) WideCharToMultiByte(CP_UTF8, 0, dir->info.cFileName, -1, result->d_name, sizeof(result->d_name), NULL, NULL); if (!FindNextFileW(dir->handle, &dir->info)) { (void) FindClose(dir->handle); dir->handle = INVALID_HANDLE_VALUE; } } else { SetLastError(ERROR_FILE_NOT_FOUND); } } else { SetLastError(ERROR_BAD_ARGUMENTS); } return result; } #endif #ifdef CS_ENABLE_SPIFFS DIR *opendir(const char *dir_name) { DIR *dir = NULL; extern spiffs fs; if (dir_name != NULL && (dir = (DIR *) malloc(sizeof(*dir))) != NULL && SPIFFS_opendir(&fs, (char *) dir_name, &dir->dh) == NULL) { free(dir); dir = NULL; } return dir; } int closedir(DIR *dir) { if (dir != NULL) { SPIFFS_closedir(&dir->dh); free(dir); } return 0; } struct dirent *readdir(DIR *dir) { return SPIFFS_readdir(&dir->dh, &dir->de); } /* SPIFFs doesn't support directory operations */ int rmdir(const char *path) { (void) path; return ENOTDIR; } int mkdir(const char *path, mode_t mode) { (void) path; (void) mode; /* for spiffs supports only root dir, which comes from mongoose as '.' */ return (strlen(path) == 1 && *path == '.') ? 0 : ENOTDIR; } #endif /* CS_ENABLE_SPIFFS */ #endif /* EXCLUDE_COMMON */ /* ISO C requires a translation unit to contain at least one declaration */ typedef int cs_dirent_dummy; #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_time.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "common/cs_time.h" */ #ifndef _WIN32 #include #if !defined(CS_PLATFORM) || \ (CS_PLATFORM != CS_P_CC3200 && CS_PLATFORM != CS_P_MSP432) #include #endif #else #include #endif double cs_time(void) { double now; #ifndef _WIN32 struct timeval tv; if (gettimeofday(&tv, NULL /* tz */) != 0) return 0; now = (double) tv.tv_sec + (((double) tv.tv_usec) / 1000000.0); #else now = GetTickCount() / 1000.0; #endif return now; } #ifdef MG_MODULE_LINES #line 1 "./src/../../common/cs_endian.h" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #ifndef CS_COMMON_CS_ENDIAN_H_ #define CS_COMMON_CS_ENDIAN_H_ /* * clang with std=-c99 uses __LITTLE_ENDIAN, by default * while for ex, RTOS gcc - LITTLE_ENDIAN, by default * it depends on __USE_BSD, but let's have everything */ #if !defined(BYTE_ORDER) && defined(__BYTE_ORDER) #define BYTE_ORDER __BYTE_ORDER #ifndef LITTLE_ENDIAN #define LITTLE_ENDIAN __LITTLE_ENDIAN #endif /* LITTLE_ENDIAN */ #ifndef BIG_ENDIAN #define BIG_ENDIAN __LITTLE_ENDIAN #endif /* BIG_ENDIAN */ #endif /* BYTE_ORDER */ #endif /* CS_COMMON_CS_ENDIAN_H_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/md5.c" #endif /* * This code implements the MD5 message-digest algorithm. * The algorithm is due to Ron Rivest. This code was * written by Colin Plumb in 1993, no copyright is claimed. * This code is in the public domain; do with it what you wish. * * Equivalent code is available from RSA Data Security, Inc. * This code has been tested against that, and is equivalent, * except that you don't need to include two pages of legalese * with every copy. * * To compute the message digest of a chunk of bytes, declare an * MD5Context structure, pass it to MD5Init, call MD5Update as * needed on buffers full of bytes, and then call MD5Final, which * will fill a supplied 16-byte array with the digest. */ #if !defined(DISABLE_MD5) && !defined(EXCLUDE_COMMON) /* Amalgamated: #include "common/md5.h" */ #ifndef CS_ENABLE_NATIVE_MD5 static void byteReverse(unsigned char *buf, unsigned longs) { /* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */ #if BYTE_ORDER == BIG_ENDIAN do { uint32_t t = (uint32_t)((unsigned) buf[3] << 8 | buf[2]) << 16 | ((unsigned) buf[1] << 8 | buf[0]); *(uint32_t *) buf = t; buf += 4; } while (--longs); #else (void) buf; (void) longs; #endif } #define F1(x, y, z) (z ^ (x & (y ^ z))) #define F2(x, y, z) F1(z, x, y) #define F3(x, y, z) (x ^ y ^ z) #define F4(x, y, z) (y ^ (x | ~z)) #define MD5STEP(f, w, x, y, z, data, s) \ (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) /* * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious * initialization constants. */ void MD5_Init(MD5_CTX *ctx) { ctx->buf[0] = 0x67452301; ctx->buf[1] = 0xefcdab89; ctx->buf[2] = 0x98badcfe; ctx->buf[3] = 0x10325476; ctx->bits[0] = 0; ctx->bits[1] = 0; } static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { register uint32_t a, b, c, d; a = buf[0]; b = buf[1]; c = buf[2]; d = buf[3]; MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); buf[0] += a; buf[1] += b; buf[2] += c; buf[3] += d; } void MD5_Update(MD5_CTX *ctx, const unsigned char *buf, size_t len) { uint32_t t; t = ctx->bits[0]; if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++; ctx->bits[1] += (uint32_t) len >> 29; t = (t >> 3) & 0x3f; if (t) { unsigned char *p = (unsigned char *) ctx->in + t; t = 64 - t; if (len < t) { memcpy(p, buf, len); return; } memcpy(p, buf, t); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (uint32_t *) ctx->in); buf += t; len -= t; } while (len >= 64) { memcpy(ctx->in, buf, 64); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (uint32_t *) ctx->in); buf += 64; len -= 64; } memcpy(ctx->in, buf, len); } void MD5_Final(unsigned char digest[16], MD5_CTX *ctx) { unsigned count; unsigned char *p; uint32_t *a; count = (ctx->bits[0] >> 3) & 0x3F; p = ctx->in + count; *p++ = 0x80; count = 64 - 1 - count; if (count < 8) { memset(p, 0, count); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (uint32_t *) ctx->in); memset(ctx->in, 0, 56); } else { memset(p, 0, count - 8); } byteReverse(ctx->in, 14); a = (uint32_t *) ctx->in; a[14] = ctx->bits[0]; a[15] = ctx->bits[1]; MD5Transform(ctx->buf, (uint32_t *) ctx->in); byteReverse((unsigned char *) ctx->buf, 4); memcpy(digest, ctx->buf, 16); memset((char *) ctx, 0, sizeof(*ctx)); } #endif /* CS_ENABLE_NATIVE_MD5 */ /* * Stringify binary data. Output buffer size must be 2 * size_of_input + 1 * because each byte of input takes 2 bytes in string representation * plus 1 byte for the terminating \0 character. */ void cs_to_hex(char *to, const unsigned char *p, size_t len) { static const char *hex = "0123456789abcdef"; for (; len--; p++) { *to++ = hex[p[0] >> 4]; *to++ = hex[p[0] & 0x0f]; } *to = '\0'; } char *cs_md5(char buf[33], ...) { unsigned char hash[16]; const unsigned char *p; va_list ap; MD5_CTX ctx; MD5_Init(&ctx); va_start(ap, buf); while ((p = va_arg(ap, const unsigned char *) ) != NULL) { size_t len = va_arg(ap, size_t); MD5_Update(&ctx, p, len); } va_end(ap); MD5_Final(hash, &ctx); cs_to_hex(buf, hash, sizeof(hash)); return buf; } #endif /* EXCLUDE_COMMON */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/mbuf.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef EXCLUDE_COMMON #include #include /* Amalgamated: #include "common/mbuf.h" */ #ifndef MBUF_REALLOC #define MBUF_REALLOC realloc #endif #ifndef MBUF_FREE #define MBUF_FREE free #endif void mbuf_init(struct mbuf *mbuf, size_t initial_size) { mbuf->len = mbuf->size = 0; mbuf->buf = NULL; mbuf_resize(mbuf, initial_size); } void mbuf_free(struct mbuf *mbuf) { if (mbuf->buf != NULL) { MBUF_FREE(mbuf->buf); mbuf_init(mbuf, 0); } } void mbuf_resize(struct mbuf *a, size_t new_size) { if (new_size > a->size || (new_size < a->size && new_size >= a->len)) { char *buf = (char *) MBUF_REALLOC(a->buf, new_size); /* * In case realloc fails, there's not much we can do, except keep things as * they are. Note that NULL is a valid return value from realloc when * size == 0, but that is covered too. */ if (buf == NULL && new_size != 0) return; a->buf = buf; a->size = new_size; } } void mbuf_trim(struct mbuf *mbuf) { mbuf_resize(mbuf, mbuf->len); } size_t mbuf_insert(struct mbuf *a, size_t off, const void *buf, size_t len) { char *p = NULL; assert(a != NULL); assert(a->len <= a->size); assert(off <= a->len); /* check overflow */ if (~(size_t) 0 - (size_t) a->buf < len) return 0; if (a->len + len <= a->size) { memmove(a->buf + off + len, a->buf + off, a->len - off); if (buf != NULL) { memcpy(a->buf + off, buf, len); } a->len += len; } else { size_t new_size = (size_t)((a->len + len) * MBUF_SIZE_MULTIPLIER); if ((p = (char *) MBUF_REALLOC(a->buf, new_size)) != NULL) { a->buf = p; memmove(a->buf + off + len, a->buf + off, a->len - off); if (buf != NULL) memcpy(a->buf + off, buf, len); a->len += len; a->size = new_size; } else { len = 0; } } return len; } size_t mbuf_append(struct mbuf *a, const void *buf, size_t len) { return mbuf_insert(a, a->len, buf, len); } void mbuf_remove(struct mbuf *mb, size_t n) { if (n > 0 && n <= mb->len) { memmove(mb->buf, mb->buf + n, mb->len - n); mb->len -= n; } } #endif /* EXCLUDE_COMMON */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/mg_str.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "common/mg_str.h" */ #include #include int mg_ncasecmp(const char *s1, const char *s2, size_t len); struct mg_str mg_mk_str(const char *s) { struct mg_str ret = {s, 0}; if (s != NULL) ret.len = strlen(s); return ret; } struct mg_str mg_mk_str_n(const char *s, size_t len) { struct mg_str ret = {s, len}; return ret; } int mg_vcmp(const struct mg_str *str1, const char *str2) { size_t n2 = strlen(str2), n1 = str1->len; int r = memcmp(str1->p, str2, (n1 < n2) ? n1 : n2); if (r == 0) { return n1 - n2; } return r; } int mg_vcasecmp(const struct mg_str *str1, const char *str2) { size_t n2 = strlen(str2), n1 = str1->len; int r = mg_ncasecmp(str1->p, str2, (n1 < n2) ? n1 : n2); if (r == 0) { return n1 - n2; } return r; } struct mg_str mg_strdup(const struct mg_str s) { struct mg_str r = {NULL, 0}; if (s.len > 0 && s.p != NULL) { r.p = (char *) malloc(s.len); if (r.p != NULL) { memcpy((char *) r.p, s.p, s.len); r.len = s.len; } } return r; } int mg_strcmp(const struct mg_str str1, const struct mg_str str2) { size_t i = 0; while (i < str1.len && i < str2.len) { if (str1.p[i] < str2.p[i]) return -1; if (str1.p[i] > str2.p[i]) return 1; i++; } if (i < str1.len) return 1; if (i < str2.len) return -1; return 0; } #ifdef MG_MODULE_LINES #line 1 "./src/../../common/sha1.c" #endif /* Copyright(c) By Steve Reid */ /* 100% Public Domain */ #if !defined(DISABLE_SHA1) && !defined(EXCLUDE_COMMON) /* Amalgamated: #include "common/sha1.h" */ #define SHA1HANDSOFF #if defined(__sun) /* Amalgamated: #include "common/solarisfixes.h" */ #endif union char64long16 { unsigned char c[64]; uint32_t l[16]; }; #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) static uint32_t blk0(union char64long16 *block, int i) { /* Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN */ #if BYTE_ORDER == LITTLE_ENDIAN block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | (rol(block->l[i], 8) & 0x00FF00FF); #endif return block->l[i]; } /* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ #undef blk #undef R0 #undef R1 #undef R2 #undef R3 #undef R4 #define blk(i) \ (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \ block->l[(i + 2) & 15] ^ block->l[i & 15], \ 1)) #define R0(v, w, x, y, z, i) \ z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \ w = rol(w, 30); #define R1(v, w, x, y, z, i) \ z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ w = rol(w, 30); #define R2(v, w, x, y, z, i) \ z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ w = rol(w, 30); #define R3(v, w, x, y, z, i) \ z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ w = rol(w, 30); #define R4(v, w, x, y, z, i) \ z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ w = rol(w, 30); void cs_sha1_transform(uint32_t state[5], const unsigned char buffer[64]) { uint32_t a, b, c, d, e; union char64long16 block[1]; memcpy(block, buffer, 64); a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4]; R0(a, b, c, d, e, 0); R0(e, a, b, c, d, 1); R0(d, e, a, b, c, 2); R0(c, d, e, a, b, 3); R0(b, c, d, e, a, 4); R0(a, b, c, d, e, 5); R0(e, a, b, c, d, 6); R0(d, e, a, b, c, 7); R0(c, d, e, a, b, 8); R0(b, c, d, e, a, 9); R0(a, b, c, d, e, 10); R0(e, a, b, c, d, 11); R0(d, e, a, b, c, 12); R0(c, d, e, a, b, 13); R0(b, c, d, e, a, 14); R0(a, b, c, d, e, 15); R1(e, a, b, c, d, 16); R1(d, e, a, b, c, 17); R1(c, d, e, a, b, 18); R1(b, c, d, e, a, 19); R2(a, b, c, d, e, 20); R2(e, a, b, c, d, 21); R2(d, e, a, b, c, 22); R2(c, d, e, a, b, 23); R2(b, c, d, e, a, 24); R2(a, b, c, d, e, 25); R2(e, a, b, c, d, 26); R2(d, e, a, b, c, 27); R2(c, d, e, a, b, 28); R2(b, c, d, e, a, 29); R2(a, b, c, d, e, 30); R2(e, a, b, c, d, 31); R2(d, e, a, b, c, 32); R2(c, d, e, a, b, 33); R2(b, c, d, e, a, 34); R2(a, b, c, d, e, 35); R2(e, a, b, c, d, 36); R2(d, e, a, b, c, 37); R2(c, d, e, a, b, 38); R2(b, c, d, e, a, 39); R3(a, b, c, d, e, 40); R3(e, a, b, c, d, 41); R3(d, e, a, b, c, 42); R3(c, d, e, a, b, 43); R3(b, c, d, e, a, 44); R3(a, b, c, d, e, 45); R3(e, a, b, c, d, 46); R3(d, e, a, b, c, 47); R3(c, d, e, a, b, 48); R3(b, c, d, e, a, 49); R3(a, b, c, d, e, 50); R3(e, a, b, c, d, 51); R3(d, e, a, b, c, 52); R3(c, d, e, a, b, 53); R3(b, c, d, e, a, 54); R3(a, b, c, d, e, 55); R3(e, a, b, c, d, 56); R3(d, e, a, b, c, 57); R3(c, d, e, a, b, 58); R3(b, c, d, e, a, 59); R4(a, b, c, d, e, 60); R4(e, a, b, c, d, 61); R4(d, e, a, b, c, 62); R4(c, d, e, a, b, 63); R4(b, c, d, e, a, 64); R4(a, b, c, d, e, 65); R4(e, a, b, c, d, 66); R4(d, e, a, b, c, 67); R4(c, d, e, a, b, 68); R4(b, c, d, e, a, 69); R4(a, b, c, d, e, 70); R4(e, a, b, c, d, 71); R4(d, e, a, b, c, 72); R4(c, d, e, a, b, 73); R4(b, c, d, e, a, 74); R4(a, b, c, d, e, 75); R4(e, a, b, c, d, 76); R4(d, e, a, b, c, 77); R4(c, d, e, a, b, 78); R4(b, c, d, e, a, 79); state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; /* Erase working structures. The order of operations is important, * used to ensure that compiler doesn't optimize those out. */ memset(block, 0, sizeof(block)); a = b = c = d = e = 0; (void) a; (void) b; (void) c; (void) d; (void) e; } void cs_sha1_init(cs_sha1_ctx *context) { context->state[0] = 0x67452301; context->state[1] = 0xEFCDAB89; context->state[2] = 0x98BADCFE; context->state[3] = 0x10325476; context->state[4] = 0xC3D2E1F0; context->count[0] = context->count[1] = 0; } void cs_sha1_update(cs_sha1_ctx *context, const unsigned char *data, uint32_t len) { uint32_t i, j; j = context->count[0]; if ((context->count[0] += len << 3) < j) context->count[1]++; context->count[1] += (len >> 29); j = (j >> 3) & 63; if ((j + len) > 63) { memcpy(&context->buffer[j], data, (i = 64 - j)); cs_sha1_transform(context->state, context->buffer); for (; i + 63 < len; i += 64) { cs_sha1_transform(context->state, &data[i]); } j = 0; } else i = 0; memcpy(&context->buffer[j], &data[i], len - i); } void cs_sha1_final(unsigned char digest[20], cs_sha1_ctx *context) { unsigned i; unsigned char finalcount[8], c; for (i = 0; i < 8; i++) { finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> ((3 - (i & 3)) * 8)) & 255); } c = 0200; cs_sha1_update(context, &c, 1); while ((context->count[0] & 504) != 448) { c = 0000; cs_sha1_update(context, &c, 1); } cs_sha1_update(context, finalcount, 8); for (i = 0; i < 20; i++) { digest[i] = (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255); } memset(context, '\0', sizeof(*context)); memset(&finalcount, '\0', sizeof(finalcount)); } void cs_hmac_sha1(const unsigned char *key, size_t keylen, const unsigned char *data, size_t datalen, unsigned char out[20]) { cs_sha1_ctx ctx; unsigned char buf1[64], buf2[64], tmp_key[20], i; if (keylen > sizeof(buf1)) { cs_sha1_init(&ctx); cs_sha1_update(&ctx, key, keylen); cs_sha1_final(tmp_key, &ctx); key = tmp_key; keylen = sizeof(tmp_key); } memset(buf1, 0, sizeof(buf1)); memset(buf2, 0, sizeof(buf2)); memcpy(buf1, key, keylen); memcpy(buf2, key, keylen); for (i = 0; i < sizeof(buf1); i++) { buf1[i] ^= 0x36; buf2[i] ^= 0x5c; } cs_sha1_init(&ctx); cs_sha1_update(&ctx, buf1, sizeof(buf1)); cs_sha1_update(&ctx, data, datalen); cs_sha1_final(out, &ctx); cs_sha1_init(&ctx); cs_sha1_update(&ctx, buf2, sizeof(buf2)); cs_sha1_update(&ctx, out, 20); cs_sha1_final(out, &ctx); } #endif /* EXCLUDE_COMMON */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/str_util.c" #endif /* * Copyright (c) 2015 Cesanta Software Limited * All rights reserved */ #ifndef EXCLUDE_COMMON /* Amalgamated: #include "common/platform.h" */ /* Amalgamated: #include "common/str_util.h" */ size_t c_strnlen(const char *s, size_t maxlen) { size_t l = 0; for (; l < maxlen && s[l] != '\0'; l++) { } return l; } #define C_SNPRINTF_APPEND_CHAR(ch) \ do { \ if (i < (int) buf_size) buf[i] = ch; \ i++; \ } while (0) #define C_SNPRINTF_FLAG_ZERO 1 #ifdef C_DISABLE_BUILTIN_SNPRINTF int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) { return vsnprintf(buf, buf_size, fmt, ap); } #else static int c_itoa(char *buf, size_t buf_size, int64_t num, int base, int flags, int field_width) { char tmp[40]; int i = 0, k = 0, neg = 0; if (num < 0) { neg++; num = -num; } /* Print into temporary buffer - in reverse order */ do { int rem = num % base; if (rem < 10) { tmp[k++] = '0' + rem; } else { tmp[k++] = 'a' + (rem - 10); } num /= base; } while (num > 0); /* Zero padding */ if (flags && C_SNPRINTF_FLAG_ZERO) { while (k < field_width && k < (int) sizeof(tmp) - 1) { tmp[k++] = '0'; } } /* And sign */ if (neg) { tmp[k++] = '-'; } /* Now output */ while (--k >= 0) { C_SNPRINTF_APPEND_CHAR(tmp[k]); } return i; } int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) { int ch, i = 0, len_mod, flags, precision, field_width; while ((ch = *fmt++) != '\0') { if (ch != '%') { C_SNPRINTF_APPEND_CHAR(ch); } else { /* * Conversion specification: * zero or more flags (one of: # 0 - + ') * an optional minimum field width (digits) * an optional precision (. followed by digits, or *) * an optional length modifier (one of: hh h l ll L q j z t) * conversion specifier (one of: d i o u x X e E f F g G a A c s p n) */ flags = field_width = precision = len_mod = 0; /* Flags. only zero-pad flag is supported. */ if (*fmt == '0') { flags |= C_SNPRINTF_FLAG_ZERO; } /* Field width */ while (*fmt >= '0' && *fmt <= '9') { field_width *= 10; field_width += *fmt++ - '0'; } /* Dynamic field width */ if (*fmt == '*') { field_width = va_arg(ap, int); fmt++; } /* Precision */ if (*fmt == '.') { fmt++; if (*fmt == '*') { precision = va_arg(ap, int); fmt++; } else { while (*fmt >= '0' && *fmt <= '9') { precision *= 10; precision += *fmt++ - '0'; } } } /* Length modifier */ switch (*fmt) { case 'h': case 'l': case 'L': case 'I': case 'q': case 'j': case 'z': case 't': len_mod = *fmt++; if (*fmt == 'h') { len_mod = 'H'; fmt++; } if (*fmt == 'l') { len_mod = 'q'; fmt++; } break; } ch = *fmt++; if (ch == 's') { const char *s = va_arg(ap, const char *); /* Always fetch parameter */ int j; int pad = field_width - (precision >= 0 ? c_strnlen(s, precision) : 0); for (j = 0; j < pad; j++) { C_SNPRINTF_APPEND_CHAR(' '); } /* `s` may be NULL in case of %.*s */ if (s != NULL) { /* Ignore negative and 0 precisions */ for (j = 0; (precision <= 0 || j < precision) && s[j] != '\0'; j++) { C_SNPRINTF_APPEND_CHAR(s[j]); } } } else if (ch == 'c') { ch = va_arg(ap, int); /* Always fetch parameter */ C_SNPRINTF_APPEND_CHAR(ch); } else if (ch == 'd' && len_mod == 0) { i += c_itoa(buf + i, buf_size - i, va_arg(ap, int), 10, flags, field_width); } else if (ch == 'd' && len_mod == 'l') { i += c_itoa(buf + i, buf_size - i, va_arg(ap, long), 10, flags, field_width); #ifdef SSIZE_MAX } else if (ch == 'd' && len_mod == 'z') { i += c_itoa(buf + i, buf_size - i, va_arg(ap, ssize_t), 10, flags, field_width); #endif } else if (ch == 'd' && len_mod == 'q') { i += c_itoa(buf + i, buf_size - i, va_arg(ap, int64_t), 10, flags, field_width); } else if ((ch == 'x' || ch == 'u') && len_mod == 0) { i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned), ch == 'x' ? 16 : 10, flags, field_width); } else if ((ch == 'x' || ch == 'u') && len_mod == 'l') { i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned long), ch == 'x' ? 16 : 10, flags, field_width); } else if ((ch == 'x' || ch == 'u') && len_mod == 'z') { i += c_itoa(buf + i, buf_size - i, va_arg(ap, size_t), ch == 'x' ? 16 : 10, flags, field_width); } else if (ch == 'p') { unsigned long num = (unsigned long) (uintptr_t) va_arg(ap, void *); C_SNPRINTF_APPEND_CHAR('0'); C_SNPRINTF_APPEND_CHAR('x'); i += c_itoa(buf + i, buf_size - i, num, 16, flags, 0); } else { #ifndef NO_LIBC /* * TODO(lsm): abort is not nice in a library, remove it * Also, ESP8266 SDK doesn't have it */ abort(); #endif } } } /* Zero-terminate the result */ if (buf_size > 0) { buf[i < (int) buf_size ? i : (int) buf_size - 1] = '\0'; } return i; } #endif int c_snprintf(char *buf, size_t buf_size, const char *fmt, ...) { int result; va_list ap; va_start(ap, fmt); result = c_vsnprintf(buf, buf_size, fmt, ap); va_end(ap); return result; } #ifdef _WIN32 int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { int ret; char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p; strncpy(buf, path, sizeof(buf)); buf[sizeof(buf) - 1] = '\0'; /* Trim trailing slashes. Leave backslash for paths like "X:\" */ p = buf + strlen(buf) - 1; while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); /* * Convert back to Unicode. If doubly-converted string does not match the * original, something is fishy, reject. */ WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), NULL, NULL); if (strcmp(buf, buf2) != 0) { wbuf[0] = L'\0'; ret = 0; } return ret; } #endif /* _WIN32 */ /* The simplest O(mn) algorithm. Better implementation are GPLed */ const char *c_strnstr(const char *s, const char *find, size_t slen) { size_t find_length = strlen(find); size_t i; for (i = 0; i < slen; i++) { if (i + find_length > slen) { return NULL; } if (strncmp(&s[i], find, find_length) == 0) { return &s[i]; } } return NULL; } #endif /* EXCLUDE_COMMON */ #ifdef MG_MODULE_LINES #line 1 "./src/net.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved * * This software is dual-licensed: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. For the terms of this * license, see . * * You are free to use this software under the terms of the GNU General * Public License, but WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * Alternatively, you can license this software under a commercial * license, as set out in . */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ /* Amalgamated: #include "mongoose/src/dns.h" */ /* Amalgamated: #include "mongoose/src/resolv.h" */ /* Amalgamated: #include "common/cs_time.h" */ #define MG_MAX_HOST_LEN 200 #define MG_COPY_COMMON_CONNECTION_OPTIONS(dst, src) \ memcpy(dst, src, sizeof(*dst)); /* Which flags can be pre-set by the user at connection creation time. */ #define _MG_ALLOWED_CONNECT_FLAGS_MASK \ (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \ MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG | MG_F_ENABLE_BROADCAST) /* Which flags should be modifiable by user's callbacks. */ #define _MG_CALLBACK_MODIFIABLE_FLAGS_MASK \ (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \ MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG | MG_F_SEND_AND_CLOSE | \ MG_F_CLOSE_IMMEDIATELY | MG_F_IS_WEBSOCKET | MG_F_DELETE_CHUNK) #ifndef intptr_t #define intptr_t long #endif extern void mg_ev_mgr_init(struct mg_mgr *mgr); extern void mg_ev_mgr_free(struct mg_mgr *mgr); extern void mg_ev_mgr_add_conn(struct mg_connection *nc); extern void mg_ev_mgr_remove_conn(struct mg_connection *nc); MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c) { DBG(("%p %p", mgr, c)); c->mgr = mgr; c->next = mgr->active_connections; mgr->active_connections = c; c->prev = NULL; if (c->next != NULL) c->next->prev = c; mg_ev_mgr_add_conn(c); } MG_INTERNAL void mg_remove_conn(struct mg_connection *conn) { if (conn->prev == NULL) conn->mgr->active_connections = conn->next; if (conn->prev) conn->prev->next = conn->next; if (conn->next) conn->next->prev = conn->prev; mg_ev_mgr_remove_conn(conn); } MG_INTERNAL void mg_call(struct mg_connection *nc, mg_event_handler_t ev_handler, int ev, void *ev_data) { if (ev_handler == NULL) { /* * If protocol handler is specified, call it. Otherwise, call user-specified * event handler. */ ev_handler = nc->proto_handler ? nc->proto_handler : nc->handler; } DBG(("%p %s ev=%d ev_data=%p flags=%lu rmbl=%d smbl=%d", nc, ev_handler == nc->handler ? "user" : "proto", ev, ev_data, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); #if !defined(NO_LIBC) && !defined(MG_DISABLE_HEXDUMP) /* LCOV_EXCL_START */ if (nc->mgr->hexdump_file != NULL && ev != MG_EV_POLL && ev != MG_EV_SEND /* handled separately */) { if (ev == MG_EV_RECV) { mg_hexdump_connection(nc, nc->mgr->hexdump_file, nc->recv_mbuf.buf, *(int *) ev_data, ev); } else { mg_hexdump_connection(nc, nc->mgr->hexdump_file, NULL, 0, ev); } } /* LCOV_EXCL_STOP */ #endif if (ev_handler != NULL) { unsigned long flags_before = nc->flags; size_t recv_mbuf_before = nc->recv_mbuf.len, recved; ev_handler(nc, ev, ev_data); recved = (recv_mbuf_before - nc->recv_mbuf.len); /* Prevent user handler from fiddling with system flags. */ if (ev_handler == nc->handler && nc->flags != flags_before) { nc->flags = (flags_before & ~_MG_CALLBACK_MODIFIABLE_FLAGS_MASK) | (nc->flags & _MG_CALLBACK_MODIFIABLE_FLAGS_MASK); } if (recved > 0 && !(nc->flags & MG_F_UDP)) { mg_if_recved(nc, recved); } } DBG(("%p after %s flags=%lu rmbl=%d smbl=%d", nc, ev_handler == nc->handler ? "user" : "proto", nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); } void mg_if_timer(struct mg_connection *c, double now) { if (c->ev_timer_time > 0 && now >= c->ev_timer_time) { double old_value = c->ev_timer_time; mg_call(c, NULL, MG_EV_TIMER, &now); /* * To prevent timer firing all the time, reset the timer after delivery. * However, in case user sets it to new value, do not reset. */ if (c->ev_timer_time == old_value) { c->ev_timer_time = 0; } } } void mg_if_poll(struct mg_connection *nc, time_t now) { if (!(nc->flags & MG_F_SSL) || (nc->flags & MG_F_SSL_HANDSHAKE_DONE)) { mg_call(nc, NULL, MG_EV_POLL, &now); } } static void mg_destroy_conn(struct mg_connection *conn, int destroy_if) { if (destroy_if) mg_if_destroy_conn(conn); if (conn->proto_data != NULL && conn->proto_data_destructor != NULL) { conn->proto_data_destructor(conn->proto_data); } #if defined(MG_ENABLE_SSL) && !defined(MG_SOCKET_SIMPLELINK) if (conn->ssl != NULL) SSL_free(conn->ssl); if (conn->ssl_ctx != NULL) SSL_CTX_free(conn->ssl_ctx); #endif mbuf_free(&conn->recv_mbuf); mbuf_free(&conn->send_mbuf); memset(conn, 0, sizeof(*conn)); MG_FREE(conn); } void mg_close_conn(struct mg_connection *conn) { DBG(("%p %lu %d", conn, conn->flags, conn->sock)); mg_remove_conn(conn); mg_if_destroy_conn(conn); mg_call(conn, NULL, MG_EV_CLOSE, NULL); mg_destroy_conn(conn, 0 /* destroy_if */); } void mg_mgr_init(struct mg_mgr *m, void *user_data) { memset(m, 0, sizeof(*m)); #ifndef MG_DISABLE_SOCKETPAIR m->ctl[0] = m->ctl[1] = INVALID_SOCKET; #endif m->user_data = user_data; #ifdef _WIN32 { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } #elif defined(__unix__) /* Ignore SIGPIPE signal, so if client cancels the request, it * won't kill the whole process. */ signal(SIGPIPE, SIG_IGN); #endif #if defined(MG_ENABLE_SSL) && !defined(MG_SOCKET_SIMPLELINK) { static int init_done; if (!init_done) { SSL_library_init(); init_done++; } } #endif mg_ev_mgr_init(m); DBG(("==================================")); DBG(("init mgr=%p", m)); } #ifdef MG_ENABLE_JAVASCRIPT static enum v7_err mg_send_js(struct v7 *v7, v7_val_t *res) { v7_val_t arg0 = v7_arg(v7, 0); v7_val_t arg1 = v7_arg(v7, 1); struct mg_connection *c = (struct mg_connection *) v7_get_ptr(v7, arg0); size_t len = 0; if (v7_is_string(arg1)) { const char *data = v7_get_string(v7, &arg1, &len); mg_send(c, data, len); } *res = v7_mk_number(v7, len); return V7_OK; } enum v7_err mg_enable_javascript(struct mg_mgr *m, struct v7 *v7, const char *init_file_name) { v7_val_t v; m->v7 = v7; v7_set_method(v7, v7_get_global(v7), "mg_send", mg_send_js); return v7_exec_file(v7, init_file_name, &v); } #endif void mg_mgr_free(struct mg_mgr *m) { struct mg_connection *conn, *tmp_conn; DBG(("%p", m)); if (m == NULL) return; /* Do one last poll, see https://github.com/cesanta/mongoose/issues/286 */ mg_mgr_poll(m, 0); #ifndef MG_DISABLE_SOCKETPAIR if (m->ctl[0] != INVALID_SOCKET) closesocket(m->ctl[0]); if (m->ctl[1] != INVALID_SOCKET) closesocket(m->ctl[1]); m->ctl[0] = m->ctl[1] = INVALID_SOCKET; #endif for (conn = m->active_connections; conn != NULL; conn = tmp_conn) { tmp_conn = conn->next; mg_close_conn(conn); } mg_ev_mgr_free(m); } int mg_vprintf(struct mg_connection *nc, const char *fmt, va_list ap) { char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; int len; if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { mg_send(nc, buf, len); } if (buf != mem && buf != NULL) { MG_FREE(buf); /* LCOV_EXCL_LINE */ } /* LCOV_EXCL_LINE */ return len; } int mg_printf(struct mg_connection *conn, const char *fmt, ...) { int len; va_list ap; va_start(ap, fmt); len = mg_vprintf(conn, fmt, ap); va_end(ap); return len; } #ifndef MG_DISABLE_SYNC_RESOLVER /* TODO(lsm): use non-blocking resolver */ static int mg_resolve2(const char *host, struct in_addr *ina) { #ifdef MG_ENABLE_GETADDRINFO int rv = 0; struct addrinfo hints, *servinfo, *p; struct sockaddr_in *h = NULL; memset(&hints, 0, sizeof hints); hints.ai_family = AF_INET; hints.ai_socktype = SOCK_STREAM; if ((rv = getaddrinfo(host, NULL, NULL, &servinfo)) != 0) { DBG(("getaddrinfo(%s) failed: %s", host, strerror(errno))); return 0; } for (p = servinfo; p != NULL; p = p->ai_next) { memcpy(&h, &p->ai_addr, sizeof(struct sockaddr_in *)); memcpy(ina, &h->sin_addr, sizeof(ina)); } freeaddrinfo(servinfo); return 1; #else struct hostent *he; if ((he = gethostbyname(host)) == NULL) { DBG(("gethostbyname(%s) failed: %s", host, strerror(errno))); } else { memcpy(ina, he->h_addr_list[0], sizeof(*ina)); return 1; } return 0; #endif /* MG_ENABLE_GETADDRINFO */ } int mg_resolve(const char *host, char *buf, size_t n) { struct in_addr ad; return mg_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0; } #endif /* MG_DISABLE_SYNC_RESOLVER */ MG_INTERNAL struct mg_connection *mg_create_connection_base( struct mg_mgr *mgr, mg_event_handler_t callback, struct mg_add_sock_opts opts) { struct mg_connection *conn; if ((conn = (struct mg_connection *) MG_CALLOC(1, sizeof(*conn))) != NULL) { conn->sock = INVALID_SOCKET; conn->handler = callback; conn->mgr = mgr; conn->last_io_time = (time_t) mg_time(); conn->flags = opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK; conn->user_data = opts.user_data; /* * SIZE_MAX is defined as a long long constant in * system headers on some platforms and so it * doesn't compile with pedantic ansi flags. */ conn->recv_mbuf_limit = ~0; } else { MG_SET_PTRPTR(opts.error_string, "failed to create connection"); } return conn; } MG_INTERNAL struct mg_connection *mg_create_connection( struct mg_mgr *mgr, mg_event_handler_t callback, struct mg_add_sock_opts opts) { struct mg_connection *conn = mg_create_connection_base(mgr, callback, opts); if (!mg_if_create_conn(conn)) { MG_FREE(conn); conn = NULL; MG_SET_PTRPTR(opts.error_string, "failed to init connection"); } return conn; } /* * Address format: [PROTO://][HOST]:PORT * * HOST could be IPv4/IPv6 address or a host name. * `host` is a destination buffer to hold parsed HOST part. Shoud be at least * MG_MAX_HOST_LEN bytes long. * `proto` is a returned socket type, either SOCK_STREAM or SOCK_DGRAM * * Return: * -1 on parse error * 0 if HOST needs DNS lookup * >0 length of the address string */ MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa, int *proto, char *host, size_t host_len) { unsigned int a, b, c, d, port = 0; int ch, len = 0; #ifdef MG_ENABLE_IPV6 char buf[100]; #endif /* * MacOS needs that. If we do not zero it, subsequent bind() will fail. * Also, all-zeroes in the socket address means binding to all addresses * for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). */ memset(sa, 0, sizeof(*sa)); sa->sin.sin_family = AF_INET; *proto = SOCK_STREAM; if (strncmp(str, "udp://", 6) == 0) { str += 6; *proto = SOCK_DGRAM; } else if (strncmp(str, "tcp://", 6) == 0) { str += 6; } if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { /* Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 */ sa->sin.sin_addr.s_addr = htonl(((uint32_t) a << 24) | ((uint32_t) b << 16) | c << 8 | d); sa->sin.sin_port = htons((uint16_t) port); #ifdef MG_ENABLE_IPV6 } else if (sscanf(str, "[%99[^]]]:%u%n", buf, &port, &len) == 2 && inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) { /* IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 */ sa->sin6.sin6_family = AF_INET6; sa->sin.sin_port = htons((uint16_t) port); #endif #ifndef MG_DISABLE_RESOLVER } else if (strlen(str) < host_len && sscanf(str, "%[^ :]:%u%n", host, &port, &len) == 2) { sa->sin.sin_port = htons((uint16_t) port); if (mg_resolve_from_hosts_file(host, sa) != 0) { return 0; } #endif } else if (sscanf(str, ":%u%n", &port, &len) == 1 || sscanf(str, "%u%n", &port, &len) == 1) { /* If only port is specified, bind to IPv4, INADDR_ANY */ sa->sin.sin_port = htons((uint16_t) port); } else { return -1; } ch = str[len]; /* Character that follows the address */ return port < 0xffffUL && (ch == '\0' || ch == ',' || isspace(ch)) ? len : -1; } #ifdef MG_ENABLE_SSL #ifndef MG_SOCKET_SIMPLELINK /* * Certificate generation script is at * https://github.com/cesanta/mongoose/blob/master/scripts/generate_ssl_certificates.sh */ #ifndef MG_DISABLE_PFS /* * Cipher suite options used for TLS negotiation. * https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_configurations */ static const char mg_s_cipher_list[] = #if defined(MG_SSL_CRYPTO_MODERN) "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:" "!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK" #elif defined(MG_SSL_CRYPTO_OLD) "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:" "ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:" "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:" "HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:" "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA" #else /* Default - intermediate. */ "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:" "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:" "DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:" "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA" #endif ; /* * Default DH params for PFS cipher negotiation. This is a 2048-bit group. * Will be used if none are provided by the user in the certificate file. */ static const char mg_s_default_dh_params[] = "\ -----BEGIN DH PARAMETERS-----\n\ MIIBCAKCAQEAlvbgD/qh9znWIlGFcV0zdltD7rq8FeShIqIhkQ0C7hYFThrBvF2E\n\ Z9bmgaP+sfQwGpVlv9mtaWjvERbu6mEG7JTkgmVUJrUt/wiRzwTaCXBqZkdUO8Tq\n\ +E6VOEQAilstG90ikN1Tfo+K6+X68XkRUIlgawBTKuvKVwBhuvlqTGerOtnXWnrt\n\ ym//hd3cd5PBYGBix0i7oR4xdghvfR2WLVu0LgdThTBb6XP7gLd19cQ1JuBtAajZ\n\ wMuPn7qlUkEFDIkAZy59/Hue/H2Q2vU/JsvVhHWCQBL4F1ofEAt50il6ZxR1QfFK\n\ 9VGKDC4oOgm9DlxwwBoC2FjqmvQlqVV3kwIBAg==\n\ -----END DH PARAMETERS-----\n"; #endif static int mg_use_ca_cert(SSL_CTX *ctx, const char *cert) { if (ctx == NULL) { return -1; } else if (cert == NULL || strcmp(cert, "*") == 0) { return 0; } SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0); return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? 0 : -2; } static int mg_use_cert(SSL_CTX *ctx, const char *cert, const char *key) { if (ctx == NULL) { return -1; } else if (cert == NULL || cert[0] == '\0' || key == NULL || key[0] == '\0') { return 0; } else if (SSL_CTX_use_certificate_file(ctx, cert, 1) == 0 || SSL_CTX_use_PrivateKey_file(ctx, key, 1) == 0) { return -2; } else { #ifndef MG_DISABLE_PFS BIO *bio = NULL; DH *dh = NULL; /* Try to read DH parameters from the cert/key file. */ bio = BIO_new_file(cert, "r"); if (bio != NULL) { dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); BIO_free(bio); } /* * If there are no DH params in the file, fall back to hard-coded ones. * Not ideal, but better than nothing. */ if (dh == NULL) { bio = BIO_new_mem_buf((void *) mg_s_default_dh_params, -1); dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); BIO_free(bio); } if (dh != NULL) { SSL_CTX_set_tmp_dh(ctx, dh); SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE); DH_free(dh); } #endif SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); SSL_CTX_use_certificate_chain_file(ctx, cert); return 0; } } /* * Turn the connection into SSL mode. * `cert` is the certificate file in PEM format. For listening connections, * certificate file must contain private key and server certificate, * concatenated. It may also contain DH params - these will be used for more * secure key exchange. `ca_cert` is a certificate authority (CA) PEM file, and * it is optional (can be set to NULL). If `ca_cert` is non-NULL, then * the connection is so-called two-way-SSL: other peer's certificate is * checked against the `ca_cert`. * * Handy OpenSSL command to generate test self-signed certificate: * * openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 999 * * Return NULL on success, or error message on failure. */ static const char *mg_set_ssl2(struct mg_connection *nc, const char *cert, const char *key, const char *ca_cert) { const char *result = NULL; DBG(("%p %s,%s,%s", nc, (cert ? cert : ""), (key ? key : ""), (ca_cert ? ca_cert : ""))); if (nc->flags & MG_F_UDP) { return "SSL for UDP is not supported"; } if (key == NULL && cert != NULL) key = cert; if (nc->ssl != NULL) { SSL_free(nc->ssl); nc->ssl = NULL; } if (nc->ssl_ctx != NULL) { SSL_CTX_free(nc->ssl_ctx); nc->ssl_ctx = NULL; } if ((nc->flags & MG_F_LISTENING) && (nc->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) { result = "SSL_CTX_new() failed"; } else if (!(nc->flags & MG_F_LISTENING) && (nc->ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) { result = "SSL_CTX_new() failed"; } else if (mg_use_cert(nc->ssl_ctx, cert, key) != 0) { result = "Invalid ssl cert"; } else if (mg_use_ca_cert(nc->ssl_ctx, ca_cert) != 0) { result = "Invalid CA cert"; } else if (!(nc->flags & MG_F_LISTENING) && (nc->ssl = SSL_new(nc->ssl_ctx)) == NULL) { result = "SSL_new() failed"; } #ifndef MG_DISABLE_PFS SSL_CTX_set_cipher_list(nc->ssl_ctx, mg_s_cipher_list); #endif if (result == NULL) nc->flags |= MG_F_SSL; return result; } const char *mg_set_ssl(struct mg_connection *nc, const char *cert, const char *ca_cert) { return mg_set_ssl2(nc, cert, NULL, ca_cert); } #else const char *mg_set_ssl2(struct mg_connection *nc, const char *cert, const char *key, const char *ca_cert); #endif /* MG_SOCKET_SIMPLELINK */ #endif /* MG_ENABLE_SSL */ struct mg_connection *mg_if_accept_new_conn(struct mg_connection *lc) { struct mg_add_sock_opts opts; struct mg_connection *nc; memset(&opts, 0, sizeof(opts)); nc = mg_create_connection(lc->mgr, lc->handler, opts); if (nc == NULL) return NULL; nc->listener = lc; nc->proto_handler = lc->proto_handler; nc->user_data = lc->user_data; nc->recv_mbuf_limit = lc->recv_mbuf_limit; if (lc->flags & MG_F_SSL) nc->flags |= MG_F_SSL; mg_add_conn(nc->mgr, nc); DBG(("%p %p %d %d", lc, nc, nc->sock, (int) nc->flags)); return nc; } void mg_if_accept_tcp_cb(struct mg_connection *nc, union socket_address *sa, size_t sa_len) { (void) sa_len; nc->sa = *sa; mg_call(nc, NULL, MG_EV_ACCEPT, &nc->sa); } void mg_send(struct mg_connection *nc, const void *buf, int len) { nc->last_io_time = (time_t) mg_time(); if (nc->flags & MG_F_UDP) { mg_if_udp_send(nc, buf, len); } else { mg_if_tcp_send(nc, buf, len); } #if !defined(NO_LIBC) && !defined(MG_DISABLE_HEXDUMP) if (nc->mgr && nc->mgr->hexdump_file != NULL) { mg_hexdump_connection(nc, nc->mgr->hexdump_file, buf, len, MG_EV_SEND); } #endif } void mg_if_sent_cb(struct mg_connection *nc, int num_sent) { if (num_sent < 0) { nc->flags |= MG_F_CLOSE_IMMEDIATELY; } mg_call(nc, NULL, MG_EV_SEND, &num_sent); } static void mg_recv_common(struct mg_connection *nc, void *buf, int len) { DBG(("%p %d %u", nc, len, (unsigned int) nc->recv_mbuf.len)); if (nc->flags & MG_F_CLOSE_IMMEDIATELY) { DBG(("%p discarded %d bytes", nc, len)); /* * This connection will not survive next poll. Do not deliver events, * send data to /dev/null without acking. */ MG_FREE(buf); return; } nc->last_io_time = (time_t) mg_time(); if (nc->recv_mbuf.len == 0) { /* Adopt buf as recv_mbuf's backing store. */ mbuf_free(&nc->recv_mbuf); nc->recv_mbuf.buf = (char *) buf; nc->recv_mbuf.size = nc->recv_mbuf.len = len; } else { mbuf_append(&nc->recv_mbuf, buf, len); MG_FREE(buf); } mg_call(nc, NULL, MG_EV_RECV, &len); } void mg_if_recv_tcp_cb(struct mg_connection *nc, void *buf, int len) { mg_recv_common(nc, buf, len); } void mg_if_recv_udp_cb(struct mg_connection *nc, void *buf, int len, union socket_address *sa, size_t sa_len) { assert(nc->flags & MG_F_UDP); DBG(("%p %u", nc, (unsigned int) len)); if (nc->flags & MG_F_LISTENING) { struct mg_connection *lc = nc; /* * Do we have an existing connection for this source? * This is very inefficient for long connection lists. */ for (nc = mg_next(lc->mgr, NULL); nc != NULL; nc = mg_next(lc->mgr, nc)) { if (memcmp(&nc->sa.sa, &sa->sa, sa_len) == 0 && nc->listener == lc) { break; } } if (nc == NULL) { struct mg_add_sock_opts opts; memset(&opts, 0, sizeof(opts)); /* Create fake connection w/out sock initialization */ nc = mg_create_connection_base(lc->mgr, lc->handler, opts); if (nc != NULL) { nc->sock = lc->sock; nc->listener = lc; nc->sa = *sa; nc->proto_handler = lc->proto_handler; nc->user_data = lc->user_data; nc->recv_mbuf_limit = lc->recv_mbuf_limit; nc->flags = MG_F_UDP; mg_add_conn(lc->mgr, nc); mg_call(nc, NULL, MG_EV_ACCEPT, &nc->sa); } else { DBG(("OOM")); /* No return here, we still need to drop on the floor */ } } } if (nc != NULL) { mg_recv_common(nc, buf, len); } else { /* Drop on the floor. */ MG_FREE(buf); mg_if_recved(nc, len); } } /* * Schedules an async connect for a resolved address and proto. * Called from two places: `mg_connect_opt()` and from async resolver. * When called from the async resolver, it must trigger `MG_EV_CONNECT` event * with a failure flag to indicate connection failure. */ MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc, int proto, union socket_address *sa) { DBG(("%p %s://%s:%hu", nc, proto == SOCK_DGRAM ? "udp" : "tcp", inet_ntoa(sa->sin.sin_addr), ntohs(sa->sin.sin_port))); nc->flags |= MG_F_CONNECTING; if (proto == SOCK_DGRAM) { mg_if_connect_udp(nc); } else { mg_if_connect_tcp(nc, sa); } mg_add_conn(nc->mgr, nc); return nc; } void mg_if_connect_cb(struct mg_connection *nc, int err) { DBG(("%p connect, err=%d", nc, err)); nc->flags &= ~MG_F_CONNECTING; if (err != 0) { nc->flags |= MG_F_CLOSE_IMMEDIATELY; } mg_call(nc, NULL, MG_EV_CONNECT, &err); } #ifndef MG_DISABLE_RESOLVER /* * Callback for the async resolver on mg_connect_opt() call. * Main task of this function is to trigger MG_EV_CONNECT event with * either failure (and dealloc the connection) * or success (and proceed with connect() */ static void resolve_cb(struct mg_dns_message *msg, void *data, enum mg_resolve_err e) { struct mg_connection *nc = (struct mg_connection *) data; int i; int failure = -1; nc->flags &= ~MG_F_RESOLVING; if (msg != NULL) { /* * Take the first DNS A answer and run... */ for (i = 0; i < msg->num_answers; i++) { if (msg->answers[i].rtype == MG_DNS_A_RECORD) { /* * Async resolver guarantees that there is at least one answer. * TODO(lsm): handle IPv6 answers too */ mg_dns_parse_record_data(msg, &msg->answers[i], &nc->sa.sin.sin_addr, 4); mg_do_connect(nc, nc->flags & MG_F_UDP ? SOCK_DGRAM : SOCK_STREAM, &nc->sa); return; } } } if (e == MG_RESOLVE_TIMEOUT) { double now = mg_time(); mg_call(nc, NULL, MG_EV_TIMER, &now); } /* * If we get there was no MG_DNS_A_RECORD in the answer */ mg_call(nc, NULL, MG_EV_CONNECT, &failure); mg_call(nc, NULL, MG_EV_CLOSE, NULL); mg_destroy_conn(nc, 1 /* destroy_if */); } #endif struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *address, mg_event_handler_t callback) { struct mg_connect_opts opts; memset(&opts, 0, sizeof(opts)); return mg_connect_opt(mgr, address, callback, opts); } #ifdef MG_ENABLE_SSL static void mg_set_ssl_server_name(struct mg_connection *nc, const char *server_name) { DBG(("%p '%s'", nc, server_name)); #ifdef SSL_KRYPTON SSL_CTX_kr_set_verify_name(nc->ssl_ctx, server_name); #elif defined(MG_SOCKET_SIMPLELINK) nc->ssl_server_name = strdup(server_name); #else /* TODO(rojer): Implement server name verification on OpenSSL. */ (void) nc; (void) server_name; #endif } #endif /* MG_ENABLE_SSL */ struct mg_connection *mg_connect_opt(struct mg_mgr *mgr, const char *address, mg_event_handler_t callback, struct mg_connect_opts opts) { struct mg_connection *nc = NULL; int proto, rc; struct mg_add_sock_opts add_sock_opts; char host[MG_MAX_HOST_LEN]; MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts); if ((nc = mg_create_connection(mgr, callback, add_sock_opts)) == NULL) { return NULL; } if ((rc = mg_parse_address(address, &nc->sa, &proto, host, sizeof(host))) < 0) { /* Address is malformed */ MG_SET_PTRPTR(opts.error_string, "cannot parse address"); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; } nc->flags |= opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK; nc->flags |= (proto == SOCK_DGRAM) ? MG_F_UDP : 0; nc->user_data = opts.user_data; #ifdef MG_ENABLE_SSL LOG(LL_DEBUG, ("%p %s %s,%s,%s", nc, address, (opts.ssl_cert ? opts.ssl_cert : "-"), (opts.ssl_key ? opts.ssl_key : "-"), (opts.ssl_ca_cert ? opts.ssl_ca_cert : "-"))); if (opts.ssl_cert != NULL || opts.ssl_ca_cert != NULL) { const char *err = mg_set_ssl2(nc, opts.ssl_cert, opts.ssl_key, opts.ssl_ca_cert); if (err != NULL) { MG_SET_PTRPTR(opts.error_string, err); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; } } if (opts.ssl_ca_cert != NULL && opts.ssl_server_name != NULL && strcmp(opts.ssl_server_name, "*") != 0) { mg_set_ssl_server_name(nc, opts.ssl_server_name); } #endif /* MG_ENABLE_SSL */ if (rc == 0) { #ifndef MG_DISABLE_RESOLVER /* * DNS resolution is required for host. * mg_parse_address() fills port in nc->sa, which we pass to resolve_cb() */ struct mg_connection *dns_conn = NULL; struct mg_resolve_async_opts o; memset(&o, 0, sizeof(o)); o.dns_conn = &dns_conn; if (mg_resolve_async_opt(nc->mgr, host, MG_DNS_A_RECORD, resolve_cb, nc, o) != 0) { MG_SET_PTRPTR(opts.error_string, "cannot schedule DNS lookup"); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; } nc->priv_2 = dns_conn; nc->flags |= MG_F_RESOLVING; #ifdef MG_ENABLE_SSL if (opts.ssl_ca_cert != NULL && opts.ssl_server_name == NULL) { mg_set_ssl_server_name(nc, host); } #endif return nc; #else MG_SET_PTRPTR(opts.error_string, "Resolver is disabled"); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; #endif } else { /* Address is parsed and resolved to IP. proceed with connect() */ return mg_do_connect(nc, proto, &nc->sa); } } struct mg_connection *mg_bind(struct mg_mgr *srv, const char *address, mg_event_handler_t event_handler) { struct mg_bind_opts opts; memset(&opts, 0, sizeof(opts)); return mg_bind_opt(srv, address, event_handler, opts); } struct mg_connection *mg_bind_opt(struct mg_mgr *mgr, const char *address, mg_event_handler_t callback, struct mg_bind_opts opts) { union socket_address sa; struct mg_connection *nc = NULL; int proto, rc; struct mg_add_sock_opts add_sock_opts; char host[MG_MAX_HOST_LEN]; MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts); if (mg_parse_address(address, &sa, &proto, host, sizeof(host)) <= 0) { MG_SET_PTRPTR(opts.error_string, "cannot parse address"); return NULL; } nc = mg_create_connection(mgr, callback, add_sock_opts); if (nc == NULL) { return NULL; } nc->sa = sa; nc->flags |= MG_F_LISTENING; if (proto == SOCK_DGRAM) nc->flags |= MG_F_UDP; #ifdef MG_ENABLE_SSL DBG(("%p %s %s %s %s", nc, address, (opts.ssl_cert ? opts.ssl_cert : ""), (opts.ssl_key ? opts.ssl_key : ""), (opts.ssl_ca_cert ? opts.ssl_ca_cert : ""))); if (opts.ssl_cert != NULL || opts.ssl_ca_cert != NULL) { const char *err = mg_set_ssl2(nc, opts.ssl_cert, opts.ssl_key, opts.ssl_ca_cert); if (err != NULL) { MG_SET_PTRPTR(opts.error_string, err); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; } } #endif /* MG_ENABLE_SSL */ if (nc->flags & MG_F_UDP) { rc = mg_if_listen_udp(nc, &nc->sa); } else { rc = mg_if_listen_tcp(nc, &nc->sa); } if (rc != 0) { DBG(("Failed to open listener: %d", rc)); MG_SET_PTRPTR(opts.error_string, "failed to open listener"); mg_destroy_conn(nc, 1 /* destroy_if */); return NULL; } mg_add_conn(nc->mgr, nc); return nc; } struct mg_connection *mg_next(struct mg_mgr *s, struct mg_connection *conn) { return conn == NULL ? s->active_connections : conn->next; } #ifndef MG_DISABLE_SOCKETPAIR void mg_broadcast(struct mg_mgr *mgr, mg_event_handler_t cb, void *data, size_t len) { struct ctl_msg ctl_msg; /* * Mongoose manager has a socketpair, `struct mg_mgr::ctl`, * where `mg_broadcast()` pushes the message. * `mg_mgr_poll()` wakes up, reads a message from the socket pair, and calls * specified callback for each connection. Thus the callback function executes * in event manager thread. */ if (mgr->ctl[0] != INVALID_SOCKET && data != NULL && len < sizeof(ctl_msg.message)) { size_t dummy; ctl_msg.callback = cb; memcpy(ctl_msg.message, data, len); dummy = MG_SEND_FUNC(mgr->ctl[0], (char *) &ctl_msg, offsetof(struct ctl_msg, message) + len, 0); dummy = MG_RECV_FUNC(mgr->ctl[0], (char *) &len, 1, 0); (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */ } } #endif /* MG_DISABLE_SOCKETPAIR */ static int isbyte(int n) { return n >= 0 && n <= 255; } static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { int n, a, b, c, d, slash = 32, len = 0; if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0 && slash < 33) { len = n; *net = ((uint32_t) a << 24) | ((uint32_t) b << 16) | ((uint32_t) c << 8) | d; *mask = slash ? 0xffffffffU << (32 - slash) : 0; } return len; } int mg_check_ip_acl(const char *acl, uint32_t remote_ip) { int allowed, flag; uint32_t net, mask; struct mg_str vec; /* If any ACL is set, deny by default */ allowed = (acl == NULL || *acl == '\0') ? '+' : '-'; while ((acl = mg_next_comma_list_entry(acl, &vec, NULL)) != NULL) { flag = vec.p[0]; if ((flag != '+' && flag != '-') || parse_net(&vec.p[1], &net, &mask) == 0) { return -1; } if (net == (remote_ip & mask)) { allowed = flag; } } DBG(("%08x %c", remote_ip, allowed)); return allowed == '+'; } /* Move data from one connection to another */ void mg_forward(struct mg_connection *from, struct mg_connection *to) { mg_send(to, from->recv_mbuf.buf, from->recv_mbuf.len); mbuf_remove(&from->recv_mbuf, from->recv_mbuf.len); } double mg_set_timer(struct mg_connection *c, double timestamp) { double result = c->ev_timer_time; c->ev_timer_time = timestamp; /* * If this connection is resolving, it's not in the list of active * connections, so not processed yet. It has a DNS resolver connection * linked to it. Set up a timer for the DNS connection. */ DBG(("%p %p %d -> %lu", c, c->priv_2, c->flags & MG_F_RESOLVING, (unsigned long) timestamp)); if ((c->flags & MG_F_RESOLVING) && c->priv_2 != NULL) { ((struct mg_connection *) c->priv_2)->ev_timer_time = timestamp; } return result; } struct mg_connection *mg_add_sock_opt(struct mg_mgr *s, sock_t sock, mg_event_handler_t callback, struct mg_add_sock_opts opts) { struct mg_connection *nc = mg_create_connection_base(s, callback, opts); if (nc != NULL) { mg_sock_set(nc, sock); mg_add_conn(nc->mgr, nc); } return nc; } struct mg_connection *mg_add_sock(struct mg_mgr *s, sock_t sock, mg_event_handler_t callback) { struct mg_add_sock_opts opts; memset(&opts, 0, sizeof(opts)); return mg_add_sock_opt(s, sock, callback, opts); } double mg_time(void) { return cs_time(); } #ifdef MG_MODULE_LINES #line 1 "./src/net_if_socket.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #if !defined(MG_DISABLE_SOCKET_IF) && !defined(MG_SOCKET_SIMPLELINK) /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ #define MG_TCP_RECV_BUFFER_SIZE 1024 #define MG_UDP_RECV_BUFFER_SIZE 1500 static sock_t mg_open_listening_socket(union socket_address *sa, int type, int proto); #if defined(MG_ENABLE_SSL) static void mg_ssl_begin(struct mg_connection *nc); static int mg_ssl_err(struct mg_connection *conn, int res); #endif void mg_set_non_blocking_mode(sock_t sock) { #ifdef _WIN32 unsigned long on = 1; ioctlsocket(sock, FIONBIO, &on); #else int flags = fcntl(sock, F_GETFL, 0); fcntl(sock, F_SETFL, flags | O_NONBLOCK); #endif } static int mg_is_error(int n) { return n == 0 || (n < 0 && errno != EINTR && errno != EINPROGRESS && errno != EAGAIN && errno != EWOULDBLOCK #ifdef _WIN32 && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK #endif ); } void mg_if_connect_tcp(struct mg_connection *nc, const union socket_address *sa) { int rc, proto = 0; nc->sock = socket(AF_INET, SOCK_STREAM, proto); if (nc->sock == INVALID_SOCKET) { nc->err = errno ? errno : 1; return; } #if !defined(MG_ESP8266) mg_set_non_blocking_mode(nc->sock); #endif rc = connect(nc->sock, &sa->sa, sizeof(sa->sin)); nc->err = mg_is_error(rc) ? errno : 0; LOG(LL_INFO, ("%p sock %d err %d", nc, nc->sock, nc->err)); } void mg_if_connect_udp(struct mg_connection *nc) { nc->sock = socket(AF_INET, SOCK_DGRAM, 0); if (nc->sock == INVALID_SOCKET) { nc->err = errno ? errno : 1; return; } if (nc->flags & MG_F_ENABLE_BROADCAST) { int optval = 1; setsockopt(nc->sock, SOL_SOCKET, SO_BROADCAST, (const char *) &optval, sizeof(optval)); } nc->err = 0; } int mg_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { int proto = 0; sock_t sock = mg_open_listening_socket(sa, SOCK_STREAM, proto); if (sock == INVALID_SOCKET) { return (errno ? errno : 1); } mg_sock_set(nc, sock); return 0; } int mg_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { sock_t sock = mg_open_listening_socket(sa, SOCK_DGRAM, 0); if (sock == INVALID_SOCKET) return (errno ? errno : 1); mg_sock_set(nc, sock); return 0; } void mg_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) { mbuf_append(&nc->send_mbuf, buf, len); } void mg_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) { mbuf_append(&nc->send_mbuf, buf, len); } void mg_if_recved(struct mg_connection *nc, size_t len) { (void) nc; (void) len; } int mg_if_create_conn(struct mg_connection *nc) { (void) nc; return 1; } void mg_if_destroy_conn(struct mg_connection *nc) { if (nc->sock == INVALID_SOCKET) return; if (!(nc->flags & MG_F_UDP)) { closesocket(nc->sock); } else { /* Only close outgoing UDP sockets or listeners. */ if (nc->listener == NULL) closesocket(nc->sock); } nc->sock = INVALID_SOCKET; } static int mg_accept_conn(struct mg_connection *lc) { struct mg_connection *nc; union socket_address sa; socklen_t sa_len = sizeof(sa); /* NOTE(lsm): on Windows, sock is always > FD_SETSIZE */ sock_t sock = accept(lc->sock, &sa.sa, &sa_len); if (sock == INVALID_SOCKET) { if (mg_is_error(-1)) DBG(("%p: failed to accept: %d", lc, errno)); return 0; } nc = mg_if_accept_new_conn(lc); if (nc == NULL) { closesocket(sock); return 0; } DBG(("%p conn from %s:%d", nc, inet_ntoa(sa.sin.sin_addr), ntohs(sa.sin.sin_port))); mg_sock_set(nc, sock); #if defined(MG_ENABLE_SSL) if (lc->ssl_ctx != NULL) { nc->ssl = SSL_new(lc->ssl_ctx); if (nc->ssl == NULL || SSL_set_fd(nc->ssl, sock) != 1) { DBG(("SSL error")); mg_close_conn(nc); } } else #endif { mg_if_accept_tcp_cb(nc, &sa, sa_len); } return 1; } /* 'sa' must be an initialized address to bind to */ static sock_t mg_open_listening_socket(union socket_address *sa, int type, int proto) { socklen_t sa_len = (sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6); sock_t sock = INVALID_SOCKET; #if !defined(MG_LWIP) int on = 1; #endif if ((sock = socket(sa->sa.sa_family, type, proto)) != INVALID_SOCKET && #if !defined(MG_LWIP) /* LWIP doesn't support either */ #if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) /* "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" http://goo.gl/RmrFTm */ !setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (void *) &on, sizeof(on)) && #endif #if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE) /* * SO_RESUSEADDR is not enabled on Windows because the semantics of * SO_REUSEADDR on UNIX and Windows is different. On Windows, * SO_REUSEADDR allows to bind a socket to a port without error even if * the port is already open by another program. This is not the behavior * SO_REUSEADDR was designed for, and leads to hard-to-track failure * scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless * SO_EXCLUSIVEADDRUSE is supported and set on a socket. */ !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && #endif #endif /* !MG_LWIP */ !bind(sock, &sa->sa, sa_len) && (type == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) { #if !defined(MG_LWIP) mg_set_non_blocking_mode(sock); /* In case port was set to 0, get the real port number */ (void) getsockname(sock, &sa->sa, &sa_len); #endif } else if (sock != INVALID_SOCKET) { closesocket(sock); sock = INVALID_SOCKET; } return sock; } static void mg_write_to_socket(struct mg_connection *nc) { struct mbuf *io = &nc->send_mbuf; int n = 0; #ifdef MG_LWIP /* With LWIP we don't know if the socket is ready */ if (io->len == 0) return; #endif assert(io->len > 0); if (nc->flags & MG_F_UDP) { int n = sendto(nc->sock, io->buf, io->len, 0, &nc->sa.sa, sizeof(nc->sa.sin)); DBG(("%p %d %d %d %s:%hu", nc, nc->sock, n, errno, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); if (n > 0) { mbuf_remove(io, n); mg_if_sent_cb(nc, n); } return; } #if defined(MG_ENABLE_SSL) if (nc->ssl != NULL) { if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) { n = SSL_write(nc->ssl, io->buf, io->len); DBG(("%p %d bytes -> %d (SSL)", nc, n, nc->sock)); if (n <= 0) { int ssl_err = mg_ssl_err(nc, n); if (ssl_err != SSL_ERROR_WANT_READ && ssl_err != SSL_ERROR_WANT_WRITE) { nc->flags |= MG_F_CLOSE_IMMEDIATELY; } return; } else { /* Successful SSL operation, clear off SSL wait flags */ nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE); } } else { mg_ssl_begin(nc); return; } } else #endif { n = (int) MG_SEND_FUNC(nc->sock, io->buf, io->len, 0); DBG(("%p %d bytes -> %d", nc, n, nc->sock)); if (n < 0 && mg_is_error(n)) { /* Something went wrong, drop the connection. */ nc->flags |= MG_F_CLOSE_IMMEDIATELY; return; } } if (n > 0) { mbuf_remove(io, n); mg_if_sent_cb(nc, n); } } MG_INTERNAL size_t recv_avail_size(struct mg_connection *conn, size_t max) { size_t avail; if (conn->recv_mbuf_limit < conn->recv_mbuf.len) return 0; avail = conn->recv_mbuf_limit - conn->recv_mbuf.len; return avail > max ? max : avail; } static void mg_handle_tcp_read(struct mg_connection *conn) { int n = 0; char *buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); if (buf == NULL) { DBG(("OOM")); return; } #if defined(MG_ENABLE_SSL) if (conn->ssl != NULL) { if (conn->flags & MG_F_SSL_HANDSHAKE_DONE) { /* SSL library may have more bytes ready to read then we ask to read. * Therefore, read in a loop until we read everything. Without the loop, * we skip to the next select() cycle which can just timeout. */ while ((n = SSL_read(conn->ssl, buf, MG_TCP_RECV_BUFFER_SIZE)) > 0) { DBG(("%p %d bytes <- %d (SSL)", conn, n, conn->sock)); mg_if_recv_tcp_cb(conn, buf, n); buf = NULL; if (conn->flags & MG_F_CLOSE_IMMEDIATELY) break; /* buf has been freed, we need a new one. */ buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); if (buf == NULL) break; } MG_FREE(buf); mg_ssl_err(conn, n); } else { MG_FREE(buf); mg_ssl_begin(conn); return; } } else #endif { n = (int) MG_RECV_FUNC(conn->sock, buf, recv_avail_size(conn, MG_TCP_RECV_BUFFER_SIZE), 0); DBG(("%p %d bytes (PLAIN) <- %d", conn, n, conn->sock)); if (n > 0) { mg_if_recv_tcp_cb(conn, buf, n); } else { MG_FREE(buf); } if (n == 0) { /* Orderly shutdown of the socket, try flushing output. */ conn->flags |= MG_F_SEND_AND_CLOSE; } else if (mg_is_error(n)) { conn->flags |= MG_F_CLOSE_IMMEDIATELY; } } } static int mg_recvfrom(struct mg_connection *nc, union socket_address *sa, socklen_t *sa_len, char **buf) { int n; *buf = (char *) MG_MALLOC(MG_UDP_RECV_BUFFER_SIZE); if (*buf == NULL) { DBG(("Out of memory")); return -ENOMEM; } n = recvfrom(nc->sock, *buf, MG_UDP_RECV_BUFFER_SIZE, 0, &sa->sa, sa_len); if (n <= 0) { DBG(("%p recvfrom: %s", nc, strerror(errno))); MG_FREE(*buf); } return n; } static void mg_handle_udp_read(struct mg_connection *nc) { char *buf = NULL; union socket_address sa; socklen_t sa_len = sizeof(sa); int n = mg_recvfrom(nc, &sa, &sa_len, &buf); DBG(("%p %d bytes from %s:%d", nc, n, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); mg_if_recv_udp_cb(nc, buf, n, &sa, sa_len); } #if defined(MG_ENABLE_SSL) static int mg_ssl_err(struct mg_connection *conn, int res) { int ssl_err = SSL_get_error(conn->ssl, res); DBG(("%p %d -> %d", conn, res, ssl_err)); if (ssl_err == SSL_ERROR_WANT_READ) { conn->flags |= MG_F_WANT_READ; } else if (ssl_err == SSL_ERROR_WANT_WRITE) { conn->flags |= MG_F_WANT_WRITE; } else { /* There could be an alert to deliver. Try our best. */ SSL_write(conn->ssl, "", 0); conn->flags |= MG_F_CLOSE_IMMEDIATELY; } return ssl_err; } static void mg_ssl_begin(struct mg_connection *nc) { int server_side = (nc->listener != NULL); int res = server_side ? SSL_accept(nc->ssl) : SSL_connect(nc->ssl); DBG(("%p %d res %d %d", nc, server_side, res, errno)); if (res == 1) { nc->flags |= MG_F_SSL_HANDSHAKE_DONE; nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE); if (server_side) { union socket_address sa; socklen_t sa_len = sizeof(sa); (void) getpeername(nc->sock, &sa.sa, &sa_len); mg_if_accept_tcp_cb(nc, &sa, sa_len); } else { mg_if_connect_cb(nc, 0); } } else { int ssl_err = mg_ssl_err(nc, res); if (ssl_err != SSL_ERROR_WANT_READ && ssl_err != SSL_ERROR_WANT_WRITE) { if (!server_side) { mg_if_connect_cb(nc, ssl_err); } nc->flags |= MG_F_CLOSE_IMMEDIATELY; } } } #endif /* defined(MG_ENABLE_SSL) */ #define _MG_F_FD_CAN_READ 1 #define _MG_F_FD_CAN_WRITE 1 << 1 #define _MG_F_FD_ERROR 1 << 2 void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, double now) { DBG(("%p fd=%d fd_flags=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, fd_flags, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); if (nc->flags & MG_F_CONNECTING) { if (fd_flags != 0) { int err = 0; #if !defined(MG_ESP8266) if (!(nc->flags & MG_F_UDP)) { socklen_t len = sizeof(err); int ret = getsockopt(nc->sock, SOL_SOCKET, SO_ERROR, (char *) &err, &len); if (ret != 0) err = 1; } #else /* * On ESP8266 we use blocking connect. */ err = nc->err; #endif #if defined(MG_ENABLE_SSL) if (nc->ssl != NULL && err == 0) { SSL_set_fd(nc->ssl, nc->sock); mg_ssl_begin(nc); } else { mg_if_connect_cb(nc, err); } #else mg_if_connect_cb(nc, err); #endif } else if (nc->err != 0) { mg_if_connect_cb(nc, nc->err); } } if (fd_flags & _MG_F_FD_CAN_READ) { if (nc->flags & MG_F_UDP) { mg_handle_udp_read(nc); } else { if (nc->flags & MG_F_LISTENING) { /* * We're not looping here, and accepting just one connection at * a time. The reason is that eCos does not respect non-blocking * flag on a listening socket and hangs in a loop. */ mg_accept_conn(nc); } else { mg_handle_tcp_read(nc); } } } if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { if ((fd_flags & _MG_F_FD_CAN_WRITE) && nc->send_mbuf.len > 0) { mg_write_to_socket(nc); } if (!(fd_flags & (_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE))) { mg_if_poll(nc, (time_t) now); } mg_if_timer(nc, now); } DBG(("%p after fd=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); } #ifndef MG_DISABLE_SOCKETPAIR static void mg_mgr_handle_ctl_sock(struct mg_mgr *mgr) { struct ctl_msg ctl_msg; int len = (int) MG_RECV_FUNC(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0); size_t dummy = MG_SEND_FUNC(mgr->ctl[1], ctl_msg.message, 1, 0); DBG(("read %d from ctl socket", len)); (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */ if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) { struct mg_connection *nc; for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) { ctl_msg.callback(nc, MG_EV_POLL, ctl_msg.message); } } } #endif /* Associate a socket to a connection. */ void mg_sock_set(struct mg_connection *nc, sock_t sock) { mg_set_non_blocking_mode(sock); mg_set_close_on_exec(sock); nc->sock = sock; DBG(("%p %d", nc, sock)); } void mg_ev_mgr_init(struct mg_mgr *mgr) { (void) mgr; DBG(("%p using select()", mgr)); #ifndef MG_DISABLE_SOCKETPAIR do { mg_socketpair(mgr->ctl, SOCK_DGRAM); } while (mgr->ctl[0] == INVALID_SOCKET); #endif } void mg_ev_mgr_free(struct mg_mgr *mgr) { (void) mgr; } void mg_ev_mgr_add_conn(struct mg_connection *nc) { (void) nc; } void mg_ev_mgr_remove_conn(struct mg_connection *nc) { (void) nc; } void mg_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) { if (sock != INVALID_SOCKET #ifdef __unix__ && sock < FD_SETSIZE #endif ) { FD_SET(sock, set); if (*max_fd == INVALID_SOCKET || sock > *max_fd) { *max_fd = sock; } } } time_t mg_mgr_poll(struct mg_mgr *mgr, int timeout_ms) { double now = mg_time(); double min_timer; struct mg_connection *nc, *tmp; struct timeval tv; fd_set read_set, write_set, err_set; sock_t max_fd = INVALID_SOCKET; int num_fds, num_ev, num_timers = 0; #ifdef __unix__ int try_dup = 1; #endif FD_ZERO(&read_set); FD_ZERO(&write_set); FD_ZERO(&err_set); #ifndef MG_DISABLE_SOCKETPAIR mg_add_to_set(mgr->ctl[1], &read_set, &max_fd); #endif /* * Note: it is ok to have connections with sock == INVALID_SOCKET in the list, * e.g. timer-only "connections". */ min_timer = 0; for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) { tmp = nc->next; if (nc->sock != INVALID_SOCKET) { num_fds++; #ifdef __unix__ /* A hack to make sure all our file descriptos fit into FD_SETSIZE. */ if (nc->sock >= FD_SETSIZE && try_dup) { int new_sock = dup(nc->sock); if (new_sock >= 0 && new_sock < FD_SETSIZE) { closesocket(nc->sock); DBG(("new sock %d -> %d", nc->sock, new_sock)); nc->sock = new_sock; } else { try_dup = 0; } } #endif if (!(nc->flags & MG_F_WANT_WRITE) && nc->recv_mbuf.len < nc->recv_mbuf_limit && (!(nc->flags & MG_F_UDP) || nc->listener == NULL)) { mg_add_to_set(nc->sock, &read_set, &max_fd); } if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) || (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) { mg_add_to_set(nc->sock, &write_set, &max_fd); mg_add_to_set(nc->sock, &err_set, &max_fd); } } if (nc->ev_timer_time > 0) { if (num_timers == 0 || nc->ev_timer_time < min_timer) { min_timer = nc->ev_timer_time; } num_timers++; } } /* * If there is a timer to be fired earlier than the requested timeout, * adjust the timeout. */ if (num_timers > 0) { double timer_timeout_ms = (min_timer - mg_time()) * 1000 + 1 /* rounding */; if (timer_timeout_ms < timeout_ms) { timeout_ms = (int) timer_timeout_ms; } } if (timeout_ms < 0) timeout_ms = 0; tv.tv_sec = timeout_ms / 1000; tv.tv_usec = (timeout_ms % 1000) * 1000; num_ev = select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv); now = mg_time(); DBG(("select @ %ld num_ev=%d of %d, timeout=%d", (long) now, num_ev, num_fds, timeout_ms)); #ifndef MG_DISABLE_SOCKETPAIR if (num_ev > 0 && mgr->ctl[1] != INVALID_SOCKET && FD_ISSET(mgr->ctl[1], &read_set)) { mg_mgr_handle_ctl_sock(mgr); } #endif for (nc = mgr->active_connections; nc != NULL; nc = tmp) { int fd_flags = 0; if (nc->sock != INVALID_SOCKET) { if (num_ev > 0) { fd_flags = (FD_ISSET(nc->sock, &read_set) && (!(nc->flags & MG_F_UDP) || nc->listener == NULL) ? _MG_F_FD_CAN_READ : 0) | (FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE : 0) | (FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0); } #ifdef MG_LWIP /* With LWIP socket emulation layer, we don't get write events */ fd_flags |= _MG_F_FD_CAN_WRITE; #endif } tmp = nc->next; mg_mgr_handle_conn(nc, fd_flags, now); } for (nc = mgr->active_connections; nc != NULL; nc = tmp) { tmp = nc->next; if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) { mg_close_conn(nc); } } return (time_t) now; } #ifndef MG_DISABLE_SOCKETPAIR int mg_socketpair(sock_t sp[2], int sock_type) { union socket_address sa; sock_t sock; socklen_t len = sizeof(sa.sin); int ret = 0; sock = sp[0] = sp[1] = INVALID_SOCKET; (void) memset(&sa, 0, sizeof(sa)); sa.sin.sin_family = AF_INET; sa.sin.sin_port = htons(0); sa.sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */ if ((sock = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) { } else if (bind(sock, &sa.sa, len) != 0) { } else if (sock_type == SOCK_STREAM && listen(sock, 1) != 0) { } else if (getsockname(sock, &sa.sa, &len) != 0) { } else if ((sp[0] = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) { } else if (connect(sp[0], &sa.sa, len) != 0) { } else if (sock_type == SOCK_DGRAM && (getsockname(sp[0], &sa.sa, &len) != 0 || connect(sock, &sa.sa, len) != 0)) { } else if ((sp[1] = (sock_type == SOCK_DGRAM ? sock : accept(sock, &sa.sa, &len))) == INVALID_SOCKET) { } else { mg_set_close_on_exec(sp[0]); mg_set_close_on_exec(sp[1]); if (sock_type == SOCK_STREAM) closesocket(sock); ret = 1; } if (!ret) { if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); if (sock != INVALID_SOCKET) closesocket(sock); sock = sp[0] = sp[1] = INVALID_SOCKET; } return ret; } #endif /* MG_DISABLE_SOCKETPAIR */ static void mg_sock_get_addr(sock_t sock, int remote, union socket_address *sa) { socklen_t slen = sizeof(*sa); memset(sa, 0, slen); if (remote) { getpeername(sock, &sa->sa, &slen); } else { getsockname(sock, &sa->sa, &slen); } } void mg_sock_to_str(sock_t sock, char *buf, size_t len, int flags) { union socket_address sa; mg_sock_get_addr(sock, flags & MG_SOCK_STRINGIFY_REMOTE, &sa); mg_sock_addr_to_str(&sa, buf, len, flags); } void mg_if_get_conn_addr(struct mg_connection *nc, int remote, union socket_address *sa) { mg_sock_get_addr(nc->sock, remote, sa); } #endif /* !defined(MG_DISABLE_SOCKET_IF) && !defined(MG_SOCKET_SIMPLELINK) */ #ifdef MG_MODULE_LINES #line 1 "./src/multithreading.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ #ifdef MG_ENABLE_THREADS static void multithreaded_ev_handler(struct mg_connection *c, int ev, void *p); /* * This thread function executes user event handler. * It runs an event manager that has only one connection, until that * connection is alive. */ static void *per_connection_thread_function(void *param) { struct mg_connection *c = (struct mg_connection *) param; struct mg_mgr m; /* mgr_data can be used subsequently, store its value */ int poll_timeout = (intptr_t) c->mgr_data; mg_mgr_init(&m, NULL); mg_add_conn(&m, c); mg_call(c, NULL, MG_EV_ACCEPT, &c->sa); while (m.active_connections != NULL) { mg_mgr_poll(&m, poll_timeout ? poll_timeout : 1000); } mg_mgr_free(&m); return param; } static void link_conns(struct mg_connection *c1, struct mg_connection *c2) { c1->priv_2 = c2; c2->priv_2 = c1; } static void unlink_conns(struct mg_connection *c) { struct mg_connection *peer = (struct mg_connection *) c->priv_2; if (peer != NULL) { peer->flags |= MG_F_SEND_AND_CLOSE; peer->priv_2 = NULL; } c->priv_2 = NULL; } static void forwarder_ev_handler(struct mg_connection *c, int ev, void *p) { (void) p; if (ev == MG_EV_RECV && c->priv_2) { mg_forward(c, (struct mg_connection *) c->priv_2); } else if (ev == MG_EV_CLOSE) { unlink_conns(c); } } static void spawn_handling_thread(struct mg_connection *nc) { struct mg_mgr dummy; sock_t sp[2]; struct mg_connection *c[2]; int poll_timeout; /* * Create a socket pair, and wrap each socket into the connection with * dummy event manager. * c[0] stays in this thread, c[1] goes to another thread. */ mg_socketpair(sp, SOCK_STREAM); memset(&dummy, 0, sizeof(dummy)); c[0] = mg_add_sock(&dummy, sp[0], forwarder_ev_handler); c[1] = mg_add_sock(&dummy, sp[1], nc->listener->priv_1.f); /* link_conns replaces priv_2, storing its value */ poll_timeout = (intptr_t) nc->priv_2; /* Interlink client connection with c[0] */ link_conns(c[0], nc); /* * Switch c[0] manager from the dummy one to the real one. c[1] manager * will be set in another thread, allocated on stack of that thread. */ mg_add_conn(nc->mgr, c[0]); /* * Dress c[1] as nc. * TODO(lsm): code in accept_conn() looks similar. Refactor. */ c[1]->listener = nc->listener; c[1]->proto_handler = nc->proto_handler; c[1]->user_data = nc->user_data; c[1]->sa = nc->sa; c[1]->flags = nc->flags; /* priv_2 is used, so, put timeout to mgr_data */ c[1]->mgr_data = (void *) (intptr_t) poll_timeout; mg_start_thread(per_connection_thread_function, c[1]); } static void multithreaded_ev_handler(struct mg_connection *c, int ev, void *p) { (void) p; if (ev == MG_EV_ACCEPT) { spawn_handling_thread(c); c->handler = forwarder_ev_handler; } } void mg_enable_multithreading_opt(struct mg_connection *nc, struct mg_multithreading_opts opts) { /* Wrap user event handler into our multithreaded_ev_handler */ nc->priv_1.f = nc->handler; /* * We put timeout to `priv_2` member of the main * (listening) connection, mt is not enabled yet, * and this member is not used */ nc->priv_2 = (void *) (intptr_t) opts.poll_timeout; nc->handler = multithreaded_ev_handler; } void mg_enable_multithreading(struct mg_connection *nc) { struct mg_multithreading_opts opts; memset(&opts, 0, sizeof(opts)); mg_enable_multithreading_opt(nc, opts); } #endif #ifdef MG_MODULE_LINES #line 1 "./src/uri.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/uri.h" */ /* * scan string until `sep`, keeping track of component boundaries in `res`. * * `p` will point to the char after the separator or it will be `end`. */ static void parse_uri_component(const char **p, const char *end, char sep, struct mg_str *res) { res->p = *p; for (; *p < end; (*p)++) { if (**p == sep) { break; } } res->len = (*p) - res->p; if (*p < end) (*p)++; } int mg_parse_uri(struct mg_str uri, struct mg_str *scheme, struct mg_str *user_info, struct mg_str *host, unsigned int *port, struct mg_str *path, struct mg_str *query, struct mg_str *fragment) { struct mg_str rscheme = {0, 0}, ruser_info = {0, 0}, rhost = {0, 0}, rpath = {0, 0}, rquery = {0, 0}, rfragment = {0, 0}; unsigned int rport = 0; enum { P_START, P_SCHEME_OR_PORT, P_USER_INFO, P_HOST, P_PORT, P_REST } state = P_START; const char *p = uri.p, *end = p + uri.len; while (p < end) { switch (state) { case P_START: /* * expecting on of: * - `scheme://xxxx` * - `xxxx:port` * - `xxxx/path` */ for (; p < end; p++) { if (*p == ':') { state = P_SCHEME_OR_PORT; break; } else if (*p == '/') { state = P_REST; break; } } if (state == P_START || state == P_REST) { rhost.p = uri.p; rhost.len = p - uri.p; } break; case P_SCHEME_OR_PORT: if (end - p >= 3 && memcmp(p, "://", 3) == 0) { rscheme.p = uri.p; rscheme.len = p - uri.p; state = P_USER_INFO; p += 2; /* point to last separator char */ } else { rhost.p = uri.p; rhost.len = p - uri.p; state = P_PORT; } break; case P_USER_INFO: p++; ruser_info.p = p; for (; p < end; p++) { if (*p == '@') { state = P_HOST; break; } else if (*p == '/') { break; } } if (p == end || *p == '/') { /* backtrack and parse as host */ state = P_HOST; p = ruser_info.p; } ruser_info.len = p - ruser_info.p; break; case P_HOST: if (*p == '@') p++; rhost.p = p; for (; p < end; p++) { if (*p == ':') { state = P_PORT; break; } else if (*p == '/') { state = P_REST; break; } } rhost.len = p - rhost.p; break; case P_PORT: p++; for (; p < end; p++) { if (*p == '/') { state = P_REST; break; } rport *= 10; rport += *p - '0'; } break; case P_REST: /* `p` points to separator. `path` includes the separator */ parse_uri_component(&p, end, '?', &rpath); parse_uri_component(&p, end, '#', &rquery); parse_uri_component(&p, end, '\0', &rfragment); break; } } if (scheme != 0) *scheme = rscheme; if (user_info != 0) *user_info = ruser_info; if (host != 0) *host = rhost; if (port != 0) *port = rport; if (path != 0) *path = rpath; if (query != 0) *query = rquery; if (fragment != 0) *fragment = rfragment; return 0; } /* Normalize the URI path. Remove/resolve "." and "..". */ int mg_normalize_uri_path(const struct mg_str *in, struct mg_str *out) { const char *s = in->p, *se = s + in->len; char *cp = (char *) out->p, *d; if (in->len == 0 || *s != '/') { out->len = 0; return 0; } d = cp; while (s < se) { const char *next = s; struct mg_str component; parse_uri_component(&next, se, '/', &component); if (mg_vcmp(&component, ".") == 0) { /* Yum. */ } else if (mg_vcmp(&component, "..") == 0) { /* Backtrack to previous slash. */ if (d > cp + 1 && *(d - 1) == '/') d--; while (d > cp && *(d - 1) != '/') d--; } else { memmove(d, s, next - s); d += next - s; } s = next; } if (d == cp) *d++ = '/'; out->p = cp; out->len = d - cp; return 1; } #ifdef MG_MODULE_LINES #line 1 "./src/http.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef MG_DISABLE_HTTP /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ /* Amalgamated: #include "common/sha1.h" */ /* Amalgamated: #include "common/md5.h" */ #ifndef MG_DISABLE_HTTP_WEBSOCKET #define MG_WS_NO_HOST_HEADER_MAGIC ((char *) 0x1) #endif /* CGI requires socketpair. */ #if defined(MG_DISABLE_SOCKETPAIR) && !defined(MG_DISABLE_CGI) #define MG_DISABLE_CGI 1 #endif static const char *mg_version_header = "Mongoose/" MG_VERSION; enum mg_http_proto_data_type { DATA_NONE, DATA_FILE, DATA_PUT }; struct mg_http_proto_data_file { FILE *fp; /* Opened file. */ int64_t cl; /* Content-Length. How many bytes to send. */ int64_t sent; /* How many bytes have been already sent. */ int keepalive; /* Keep connection open after sending. */ enum mg_http_proto_data_type type; }; struct mg_http_proto_data_cgi { struct mg_connection *cgi_nc; }; struct mg_http_proto_data_chuncked { int64_t body_len; /* How many bytes of chunked body was reassembled. */ }; struct mg_http_endpoint { struct mg_http_endpoint *next; const char *name; size_t name_len; mg_event_handler_t handler; }; enum mg_http_multipart_stream_state { MPS_BEGIN, MPS_WAITING_FOR_BOUNDARY, MPS_WAITING_FOR_CHUNK, MPS_GOT_CHUNK, MPS_GOT_BOUNDARY, MPS_FINALIZE, MPS_FINISHED }; struct mg_http_multipart_stream { const char *boundary; int boundary_len; const char *var_name; const char *file_name; void *user_data; int prev_io_len; enum mg_http_multipart_stream_state state; int processing_part; }; struct mg_http_proto_data { #ifndef MG_DISABLE_FILESYSTEM struct mg_http_proto_data_file file; #endif #ifndef MG_DISABLE_CGI struct mg_http_proto_data_cgi cgi; #endif #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART struct mg_http_multipart_stream mp_stream; #endif struct mg_http_proto_data_chuncked chunk; struct mg_http_endpoint *endpoints; mg_event_handler_t endpoint_handler; }; static void mg_http_conn_destructor(void *proto_data); static struct mg_http_proto_data *mg_http_get_proto_data( struct mg_connection *c) { if (c->proto_data == NULL) { c->proto_data = MG_CALLOC(1, sizeof(struct mg_http_proto_data)); c->proto_data_destructor = mg_http_conn_destructor; } return (struct mg_http_proto_data *) c->proto_data; } #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART static void mg_http_free_proto_data_mp_stream( struct mg_http_multipart_stream *mp) { free((void *) mp->boundary); free((void *) mp->var_name); free((void *) mp->file_name); memset(mp, 0, sizeof(*mp)); } #endif #ifndef MG_DISABLE_FILESYSTEM static void mg_http_free_proto_data_file(struct mg_http_proto_data_file *d) { if (d != NULL) { if (d->fp != NULL) { fclose(d->fp); } memset(d, 0, sizeof(struct mg_http_proto_data_file)); } } #endif #ifndef MG_DISABLE_CGI static void mg_http_free_proto_data_cgi(struct mg_http_proto_data_cgi *d) { if (d != NULL) { if (d->cgi_nc != NULL) d->cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; memset(d, 0, sizeof(struct mg_http_proto_data_cgi)); } } #endif static void mg_http_free_proto_data_endpoints(struct mg_http_endpoint **ep) { struct mg_http_endpoint *current = *ep; while (current != NULL) { struct mg_http_endpoint *tmp = current->next; free((void *) current->name); free(current); current = tmp; } ep = NULL; } static void mg_http_conn_destructor(void *proto_data) { struct mg_http_proto_data *pd = (struct mg_http_proto_data *) proto_data; #ifndef MG_DISABLE_FILESYSTEM mg_http_free_proto_data_file(&pd->file); #endif #ifndef MG_DISABLE_CGI mg_http_free_proto_data_cgi(&pd->cgi); #endif #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART mg_http_free_proto_data_mp_stream(&pd->mp_stream); #endif mg_http_free_proto_data_endpoints(&pd->endpoints); free(proto_data); } /* * This structure helps to create an environment for the spawned CGI program. * Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, * last element must be NULL. * However, on Windows there is a requirement that all these VARIABLE=VALUE\0 * strings must reside in a contiguous buffer. The end of the buffer is * marked by two '\0' characters. * We satisfy both worlds: we create an envp array (which is vars), all * entries are actually pointers inside buf. */ struct mg_cgi_env_block { struct mg_connection *nc; char buf[MG_CGI_ENVIRONMENT_SIZE]; /* Environment buffer */ const char *vars[MG_MAX_CGI_ENVIR_VARS]; /* char *envp[] */ int len; /* Space taken */ int nvars; /* Number of variables in envp[] */ }; #ifndef MG_DISABLE_FILESYSTEM #define MIME_ENTRY(_ext, _type) \ { _ext, sizeof(_ext) - 1, _type } static const struct { const char *extension; size_t ext_len; const char *mime_type; } mg_static_builtin_mime_types[] = { MIME_ENTRY("html", "text/html"), MIME_ENTRY("html", "text/html"), MIME_ENTRY("htm", "text/html"), MIME_ENTRY("shtm", "text/html"), MIME_ENTRY("shtml", "text/html"), MIME_ENTRY("css", "text/css"), MIME_ENTRY("js", "application/x-javascript"), MIME_ENTRY("ico", "image/x-icon"), MIME_ENTRY("gif", "image/gif"), MIME_ENTRY("jpg", "image/jpeg"), MIME_ENTRY("jpeg", "image/jpeg"), MIME_ENTRY("png", "image/png"), MIME_ENTRY("svg", "image/svg+xml"), MIME_ENTRY("txt", "text/plain"), MIME_ENTRY("torrent", "application/x-bittorrent"), MIME_ENTRY("wav", "audio/x-wav"), MIME_ENTRY("mp3", "audio/x-mp3"), MIME_ENTRY("mid", "audio/mid"), MIME_ENTRY("m3u", "audio/x-mpegurl"), MIME_ENTRY("ogg", "application/ogg"), MIME_ENTRY("ram", "audio/x-pn-realaudio"), MIME_ENTRY("xml", "text/xml"), MIME_ENTRY("ttf", "application/x-font-ttf"), MIME_ENTRY("json", "application/json"), MIME_ENTRY("xslt", "application/xml"), MIME_ENTRY("xsl", "application/xml"), MIME_ENTRY("ra", "audio/x-pn-realaudio"), MIME_ENTRY("doc", "application/msword"), MIME_ENTRY("exe", "application/octet-stream"), MIME_ENTRY("zip", "application/x-zip-compressed"), MIME_ENTRY("xls", "application/excel"), MIME_ENTRY("tgz", "application/x-tar-gz"), MIME_ENTRY("tar", "application/x-tar"), MIME_ENTRY("gz", "application/x-gunzip"), MIME_ENTRY("arj", "application/x-arj-compressed"), MIME_ENTRY("rar", "application/x-rar-compressed"), MIME_ENTRY("rtf", "application/rtf"), MIME_ENTRY("pdf", "application/pdf"), MIME_ENTRY("swf", "application/x-shockwave-flash"), MIME_ENTRY("mpg", "video/mpeg"), MIME_ENTRY("webm", "video/webm"), MIME_ENTRY("mpeg", "video/mpeg"), MIME_ENTRY("mov", "video/quicktime"), MIME_ENTRY("mp4", "video/mp4"), MIME_ENTRY("m4v", "video/x-m4v"), MIME_ENTRY("asf", "video/x-ms-asf"), MIME_ENTRY("avi", "video/x-msvideo"), MIME_ENTRY("bmp", "image/bmp"), {NULL, 0, NULL}}; #ifndef MG_DISABLE_DAV static int mg_mkdir(const char *path, uint32_t mode) { #ifndef _WIN32 return mkdir(path, mode); #else (void) mode; return _mkdir(path); #endif } #endif static struct mg_str mg_get_mime_type(const char *path, const char *dflt, const struct mg_serve_http_opts *opts) { const char *ext, *overrides; size_t i, path_len; struct mg_str r, k, v; path_len = strlen(path); overrides = opts->custom_mime_types; while ((overrides = mg_next_comma_list_entry(overrides, &k, &v)) != NULL) { ext = path + (path_len - k.len); if (path_len > k.len && mg_vcasecmp(&k, ext) == 0) { return v; } } for (i = 0; mg_static_builtin_mime_types[i].extension != NULL; i++) { ext = path + (path_len - mg_static_builtin_mime_types[i].ext_len); if (path_len > mg_static_builtin_mime_types[i].ext_len && ext[-1] == '.' && mg_casecmp(ext, mg_static_builtin_mime_types[i].extension) == 0) { r.p = mg_static_builtin_mime_types[i].mime_type; r.len = strlen(r.p); return r; } } r.p = dflt; r.len = strlen(r.p); return r; } #endif /* * Check whether full request is buffered. Return: * -1 if request is malformed * 0 if request is not yet fully buffered * >0 actual request length, including last \r\n\r\n */ static int mg_http_get_request_len(const char *s, int buf_len) { const unsigned char *buf = (unsigned char *) s; int i; for (i = 0; i < buf_len; i++) { if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) { return -1; } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') { return i + 2; } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' && buf[i + 2] == '\n') { return i + 3; } } return 0; } static const char *mg_http_parse_headers(const char *s, const char *end, int len, struct http_message *req) { int i = 0; while (i < (int) ARRAY_SIZE(req->header_names) - 1) { struct mg_str *k = &req->header_names[i], *v = &req->header_values[i]; s = mg_skip(s, end, ": ", k); s = mg_skip(s, end, "\r\n", v); while (v->len > 0 && v->p[v->len - 1] == ' ') { v->len--; /* Trim trailing spaces in header value */ } /* * If header value is empty - skip it and go to next (if any). * NOTE: Do not add it to headers_values because such addition changes API * behaviour */ if (k->len != 0 && v->len == 0) { continue; } if (k->len == 0 || v->len == 0) { k->p = v->p = NULL; k->len = v->len = 0; break; } if (!mg_ncasecmp(k->p, "Content-Length", 14)) { req->body.len = (size_t) to64(v->p); req->message.len = len + req->body.len; } i++; } return s; } int mg_parse_http(const char *s, int n, struct http_message *hm, int is_req) { const char *end, *qs; int len = mg_http_get_request_len(s, n); if (len <= 0) return len; memset(hm, 0, sizeof(*hm)); hm->message.p = s; hm->body.p = s + len; hm->message.len = hm->body.len = (size_t) ~0; end = s + len; /* Request is fully buffered. Skip leading whitespaces. */ while (s < end && isspace(*(unsigned char *) s)) s++; if (is_req) { /* Parse request line: method, URI, proto */ s = mg_skip(s, end, " ", &hm->method); s = mg_skip(s, end, " ", &hm->uri); s = mg_skip(s, end, "\r\n", &hm->proto); if (hm->uri.p <= hm->method.p || hm->proto.p <= hm->uri.p) return -1; /* If URI contains '?' character, initialize query_string */ if ((qs = (char *) memchr(hm->uri.p, '?', hm->uri.len)) != NULL) { hm->query_string.p = qs + 1; hm->query_string.len = &hm->uri.p[hm->uri.len] - (qs + 1); hm->uri.len = qs - hm->uri.p; } } else { s = mg_skip(s, end, " ", &hm->proto); if (end - s < 4 || s[3] != ' ') return -1; hm->resp_code = atoi(s); if (hm->resp_code < 100 || hm->resp_code >= 600) return -1; s += 4; s = mg_skip(s, end, "\r\n", &hm->resp_status_msg); } s = mg_http_parse_headers(s, end, len, hm); /* * mg_parse_http() is used to parse both HTTP requests and HTTP * responses. If HTTP response does not have Content-Length set, then * body is read until socket is closed, i.e. body.len is infinite (~0). * * For HTTP requests though, according to * http://tools.ietf.org/html/rfc7231#section-8.1.3, * only POST and PUT methods have defined body semantics. * Therefore, if Content-Length is not specified and methods are * not one of PUT or POST, set body length to 0. * * So, * if it is HTTP request, and Content-Length is not set, * and method is not (PUT or POST) then reset body length to zero. */ if (hm->body.len == (size_t) ~0 && is_req && mg_vcasecmp(&hm->method, "PUT") != 0 && mg_vcasecmp(&hm->method, "POST") != 0) { hm->body.len = 0; hm->message.len = len; } return len; } struct mg_str *mg_get_http_header(struct http_message *hm, const char *name) { size_t i, len = strlen(name); for (i = 0; hm->header_names[i].len > 0; i++) { struct mg_str *h = &hm->header_names[i], *v = &hm->header_values[i]; if (h->p != NULL && h->len == len && !mg_ncasecmp(h->p, name, len)) return v; } return NULL; } #ifndef MG_DISABLE_HTTP_WEBSOCKET static int mg_is_ws_fragment(unsigned char flags) { return (flags & 0x80) == 0 || (flags & 0x0f) == 0; } static int mg_is_ws_first_fragment(unsigned char flags) { return (flags & 0x80) == 0 && (flags & 0x0f) != 0; } static void mg_handle_incoming_websocket_frame(struct mg_connection *nc, struct websocket_message *wsm) { if (wsm->flags & 0x8) { mg_call(nc, nc->handler, MG_EV_WEBSOCKET_CONTROL_FRAME, wsm); } else { mg_call(nc, nc->handler, MG_EV_WEBSOCKET_FRAME, wsm); } } static int mg_deliver_websocket_data(struct mg_connection *nc) { /* Using unsigned char *, cause of integer arithmetic below */ uint64_t i, data_len = 0, frame_len = 0, buf_len = nc->recv_mbuf.len, len, mask_len = 0, header_len = 0; unsigned char *p = (unsigned char *) nc->recv_mbuf.buf, *buf = p, *e = p + buf_len; unsigned *sizep = (unsigned *) &p[1]; /* Size ptr for defragmented frames */ int ok, reass = buf_len > 0 && mg_is_ws_fragment(p[0]) && !(nc->flags & MG_F_WEBSOCKET_NO_DEFRAG); /* If that's a continuation frame that must be reassembled, handle it */ if (reass && !mg_is_ws_first_fragment(p[0]) && buf_len >= 1 + sizeof(*sizep) && buf_len >= 1 + sizeof(*sizep) + *sizep) { buf += 1 + sizeof(*sizep) + *sizep; buf_len -= 1 + sizeof(*sizep) + *sizep; } if (buf_len >= 2) { len = buf[1] & 127; mask_len = buf[1] & 128 ? 4 : 0; if (len < 126 && buf_len >= mask_len) { data_len = len; header_len = 2 + mask_len; } else if (len == 126 && buf_len >= 4 + mask_len) { header_len = 4 + mask_len; data_len = ntohs(*(uint16_t *) &buf[2]); } else if (buf_len >= 10 + mask_len) { header_len = 10 + mask_len; data_len = (((uint64_t) ntohl(*(uint32_t *) &buf[2])) << 32) + ntohl(*(uint32_t *) &buf[6]); } } frame_len = header_len + data_len; ok = frame_len > 0 && frame_len <= buf_len; if (ok) { struct websocket_message wsm; wsm.size = (size_t) data_len; wsm.data = buf + header_len; wsm.flags = buf[0]; /* Apply mask if necessary */ if (mask_len > 0) { for (i = 0; i < data_len; i++) { buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4]; } } if (reass) { /* On first fragmented frame, nullify size */ if (mg_is_ws_first_fragment(wsm.flags)) { mbuf_resize(&nc->recv_mbuf, nc->recv_mbuf.size + sizeof(*sizep)); p[0] &= ~0x0f; /* Next frames will be treated as continuation */ buf = p + 1 + sizeof(*sizep); *sizep = 0; /* TODO(lsm): fix. this can stomp over frame data */ } /* Append this frame to the reassembled buffer */ memmove(buf, wsm.data, e - wsm.data); (*sizep) += wsm.size; nc->recv_mbuf.len -= wsm.data - buf; /* On last fragmented frame - call user handler and remove data */ if (wsm.flags & 0x80) { wsm.data = p + 1 + sizeof(*sizep); wsm.size = *sizep; mg_handle_incoming_websocket_frame(nc, &wsm); mbuf_remove(&nc->recv_mbuf, 1 + sizeof(*sizep) + *sizep); } } else { /* TODO(lsm): properly handle OOB control frames during defragmentation */ mg_handle_incoming_websocket_frame(nc, &wsm); mbuf_remove(&nc->recv_mbuf, (size_t) frame_len); /* Cleanup frame */ } /* If client closes, close too */ if ((buf[0] & 0x0f) == WEBSOCKET_OP_CLOSE) { nc->flags |= MG_F_SEND_AND_CLOSE; } } return ok; } struct ws_mask_ctx { size_t pos; /* zero means unmasked */ uint32_t mask; }; static uint32_t mg_ws_random_mask(void) { uint32_t mask; /* * The spec requires WS client to generate hard to * guess mask keys. From RFC6455, Section 5.3: * * The unpredictability of the masking key is essential to prevent * authors of malicious applications from selecting the bytes that appear on * the wire. * * Hence this feature is essential when the actual end user of this API * is untrusted code that wouldn't have access to a lower level net API * anyway (e.g. web browsers). Hence this feature is low prio for most * mongoose use cases and thus can be disabled, e.g. when porting to a platform * that lacks rand(). */ #ifdef MG_DISABLE_WS_RANDOM_MASK mask = 0xefbeadde; /* generated with a random number generator, I swear */ #else if (sizeof(long) >= 4) { mask = (uint32_t) rand(); } else if (sizeof(long) == 2) { mask = (uint32_t) rand() << 16 | (uint32_t) rand(); } #endif return mask; } static void mg_send_ws_header(struct mg_connection *nc, int op, size_t len, struct ws_mask_ctx *ctx) { int header_len; unsigned char header[10]; header[0] = (op & WEBSOCKET_DONT_FIN ? 0x0 : 0x80) + (op & 0x0f); if (len < 126) { header[1] = (unsigned char) len; header_len = 2; } else if (len < 65535) { uint16_t tmp = htons((uint16_t) len); header[1] = 126; memcpy(&header[2], &tmp, sizeof(tmp)); header_len = 4; } else { uint32_t tmp; header[1] = 127; tmp = htonl((uint32_t)((uint64_t) len >> 32)); memcpy(&header[2], &tmp, sizeof(tmp)); tmp = htonl((uint32_t)(len & 0xffffffff)); memcpy(&header[6], &tmp, sizeof(tmp)); header_len = 10; } /* client connections enable masking */ if (nc->listener == NULL) { header[1] |= 1 << 7; /* set masking flag */ mg_send(nc, header, header_len); ctx->mask = mg_ws_random_mask(); mg_send(nc, &ctx->mask, sizeof(ctx->mask)); ctx->pos = nc->send_mbuf.len; } else { mg_send(nc, header, header_len); ctx->pos = 0; } } static void mg_ws_mask_frame(struct mbuf *mbuf, struct ws_mask_ctx *ctx) { size_t i; if (ctx->pos == 0) return; for (i = 0; i < (mbuf->len - ctx->pos); i++) { mbuf->buf[ctx->pos + i] ^= ((char *) &ctx->mask)[i % 4]; } } void mg_send_websocket_frame(struct mg_connection *nc, int op, const void *data, size_t len) { struct ws_mask_ctx ctx; DBG(("%p %d %d", nc, op, (int) len)); mg_send_ws_header(nc, op, len, &ctx); mg_send(nc, data, len); mg_ws_mask_frame(&nc->send_mbuf, &ctx); if (op == WEBSOCKET_OP_CLOSE) { nc->flags |= MG_F_SEND_AND_CLOSE; } } void mg_send_websocket_framev(struct mg_connection *nc, int op, const struct mg_str *strv, int strvcnt) { struct ws_mask_ctx ctx; int i; int len = 0; for (i = 0; i < strvcnt; i++) { len += strv[i].len; } mg_send_ws_header(nc, op, len, &ctx); for (i = 0; i < strvcnt; i++) { mg_send(nc, strv[i].p, strv[i].len); } mg_ws_mask_frame(&nc->send_mbuf, &ctx); if (op == WEBSOCKET_OP_CLOSE) { nc->flags |= MG_F_SEND_AND_CLOSE; } } void mg_printf_websocket_frame(struct mg_connection *nc, int op, const char *fmt, ...) { char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; va_list ap; int len; va_start(ap, fmt); if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { mg_send_websocket_frame(nc, op, buf, len); } va_end(ap); if (buf != mem && buf != NULL) { MG_FREE(buf); } } static void mg_websocket_handler(struct mg_connection *nc, int ev, void *ev_data) { mg_call(nc, nc->handler, ev, ev_data); switch (ev) { case MG_EV_RECV: do { } while (mg_deliver_websocket_data(nc)); break; case MG_EV_POLL: /* Ping idle websocket connections */ { time_t now = *(time_t *) ev_data; if (nc->flags & MG_F_IS_WEBSOCKET && now > nc->last_io_time + MG_WEBSOCKET_PING_INTERVAL_SECONDS) { mg_send_websocket_frame(nc, WEBSOCKET_OP_PING, "", 0); } } break; default: break; } } #ifndef MG_EXT_SHA1 static void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[], const size_t *msg_lens, uint8_t *digest) { size_t i; cs_sha1_ctx sha_ctx; cs_sha1_init(&sha_ctx); for (i = 0; i < num_msgs; i++) { cs_sha1_update(&sha_ctx, msgs[i], msg_lens[i]); } cs_sha1_final(digest, &sha_ctx); } #else extern void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[], const size_t *msg_lens, uint8_t *digest); #endif static void mg_ws_handshake(struct mg_connection *nc, const struct mg_str *key) { static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; const uint8_t *msgs[2] = {(const uint8_t *) key->p, (const uint8_t *) magic}; const size_t msg_lens[2] = {key->len, 36}; unsigned char sha[20]; char b64_sha[30]; mg_hash_sha1_v(2, msgs, msg_lens, sha); mg_base64_encode(sha, sizeof(sha), b64_sha); mg_printf(nc, "%s%s%s", "HTTP/1.1 101 Switching Protocols\r\n" "Upgrade: websocket\r\n" "Connection: Upgrade\r\n" "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); DBG(("%p %.*s %s", nc, (int) key->len, key->p, b64_sha)); } #endif /* MG_DISABLE_HTTP_WEBSOCKET */ #ifndef MG_DISABLE_FILESYSTEM static void mg_http_transfer_file_data(struct mg_connection *nc) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); char buf[MG_MAX_HTTP_SEND_MBUF]; size_t n = 0, to_read = 0, left = (size_t)(pd->file.cl - pd->file.sent); if (pd->file.type == DATA_FILE) { struct mbuf *io = &nc->send_mbuf; if (io->len < sizeof(buf)) { to_read = sizeof(buf) - io->len; } if (left > 0 && to_read > left) { to_read = left; } if (to_read == 0) { /* Rate limiting. send_mbuf is too full, wait until it's drained. */ } else if (pd->file.sent < pd->file.cl && (n = fread(buf, 1, to_read, pd->file.fp)) > 0) { mg_send(nc, buf, n); pd->file.sent += n; } else { if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE; mg_http_free_proto_data_file(&pd->file); } } else if (pd->file.type == DATA_PUT) { struct mbuf *io = &nc->recv_mbuf; size_t to_write = left <= 0 ? 0 : left < io->len ? (size_t) left : io->len; size_t n = fwrite(io->buf, 1, to_write, pd->file.fp); if (n > 0) { mbuf_remove(io, n); pd->file.sent += n; } if (n == 0 || pd->file.sent >= pd->file.cl) { if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE; mg_http_free_proto_data_file(&pd->file); } } #ifndef MG_DISABLE_CGI else if (pd->cgi.cgi_nc != NULL) { /* This is POST data that needs to be forwarded to the CGI process */ if (pd->cgi.cgi_nc != NULL) { mg_forward(nc, pd->cgi.cgi_nc); } else { nc->flags |= MG_F_SEND_AND_CLOSE; } } #endif } #endif /* MG_DISABLE_FILESYSTEM */ /* * Parse chunked-encoded buffer. Return 0 if the buffer is not encoded, or * if it's incomplete. If the chunk is fully buffered, return total number of * bytes in a chunk, and store data in `data`, `data_len`. */ static size_t mg_http_parse_chunk(char *buf, size_t len, char **chunk_data, size_t *chunk_len) { unsigned char *s = (unsigned char *) buf; size_t n = 0; /* scanned chunk length */ size_t i = 0; /* index in s */ /* Scan chunk length. That should be a hexadecimal number. */ while (i < len && isxdigit(s[i])) { n *= 16; n += (s[i] >= '0' && s[i] <= '9') ? s[i] - '0' : tolower(s[i]) - 'a' + 10; i++; } /* Skip new line */ if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') { return 0; } i += 2; /* Record where the data is */ *chunk_data = (char *) s + i; *chunk_len = n; /* Skip data */ i += n; /* Skip new line */ if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') { return 0; } return i + 2; } MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc, struct http_message *hm, char *buf, size_t blen) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); char *data; size_t i, n, data_len, body_len, zero_chunk_received = 0; /* Find out piece of received data that is not yet reassembled */ body_len = (size_t) pd->chunk.body_len; assert(blen >= body_len); /* Traverse all fully buffered chunks */ for (i = body_len; (n = mg_http_parse_chunk(buf + i, blen - i, &data, &data_len)) > 0; i += n) { /* Collapse chunk data to the rest of HTTP body */ memmove(buf + body_len, data, data_len); body_len += data_len; hm->body.len = body_len; if (data_len == 0) { zero_chunk_received = 1; i += n; break; } } if (i > body_len) { /* Shift unparsed content to the parsed body */ assert(i <= blen); memmove(buf + body_len, buf + i, blen - i); memset(buf + body_len + blen - i, 0, i - body_len); nc->recv_mbuf.len -= i - body_len; pd->chunk.body_len = body_len; /* Send MG_EV_HTTP_CHUNK event */ nc->flags &= ~MG_F_DELETE_CHUNK; mg_call(nc, nc->handler, MG_EV_HTTP_CHUNK, hm); /* Delete processed data if user set MG_F_DELETE_CHUNK flag */ if (nc->flags & MG_F_DELETE_CHUNK) { memset(buf, 0, body_len); memmove(buf, buf + body_len, blen - i); nc->recv_mbuf.len -= body_len; hm->body.len = 0; pd->chunk.body_len = 0; } if (zero_chunk_received) { hm->message.len = (size_t) pd->chunk.body_len + blen - i; } } return body_len; } static mg_event_handler_t mg_http_get_endpoint_handler( struct mg_connection *nc, struct mg_str *uri_path) { struct mg_http_proto_data *pd; mg_event_handler_t ret = NULL; int matched, matched_max = 0; struct mg_http_endpoint *ep; if (nc == NULL) { return NULL; } pd = mg_http_get_proto_data(nc); ep = pd->endpoints; while (ep != NULL) { const struct mg_str name_s = {ep->name, ep->name_len}; if ((matched = mg_match_prefix_n(name_s, *uri_path)) != -1) { if (matched > matched_max) { /* Looking for the longest suitable handler */ ret = ep->handler; matched_max = matched; } } ep = ep->next; } return ret; } static void mg_http_call_endpoint_handler(struct mg_connection *nc, int ev, struct http_message *hm) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); if (pd->endpoint_handler == NULL || ev == MG_EV_HTTP_REQUEST) { pd->endpoint_handler = ev == MG_EV_HTTP_REQUEST ? mg_http_get_endpoint_handler(nc->listener, &hm->uri) : NULL; } mg_call(nc, pd->endpoint_handler ? pd->endpoint_handler : nc->handler, ev, hm); } #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART static void mg_http_multipart_continue(struct mg_connection *nc); static void mg_http_multipart_begin(struct mg_connection *nc, struct http_message *hm, int req_len); #endif /* * lx106 compiler has a bug (TODO(mkm) report and insert tracking bug here) * If a big structure is declared in a big function, lx106 gcc will make it * even bigger (round up to 4k, from 700 bytes of actual size). */ #ifdef __xtensa__ static void mg_http_handler2(struct mg_connection *nc, int ev, void *ev_data, struct http_message *hm) __attribute__((noinline)); void mg_http_handler(struct mg_connection *nc, int ev, void *ev_data) { struct http_message hm; mg_http_handler2(nc, ev, ev_data, &hm); } static void mg_http_handler2(struct mg_connection *nc, int ev, void *ev_data, struct http_message *hm) { #else /* !__XTENSA__ */ void mg_http_handler(struct mg_connection *nc, int ev, void *ev_data) { struct http_message shm; struct http_message *hm = &shm; #endif /* __XTENSA__ */ struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); struct mbuf *io = &nc->recv_mbuf; int req_len; const int is_req = (nc->listener != NULL); #ifndef MG_DISABLE_HTTP_WEBSOCKET struct mg_str *vec; #endif if (ev == MG_EV_CLOSE) { #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART if (pd->mp_stream.boundary != NULL) { /* * Multipart message is in progress, but we get close * MG_EV_HTTP_PART_END with error flag */ struct mg_http_multipart_part mp; memset(&mp, 0, sizeof(mp)); mp.status = -1; mp.var_name = pd->mp_stream.var_name; mp.file_name = pd->mp_stream.file_name; mg_call(nc, (pd->endpoint_handler ? pd->endpoint_handler : nc->handler), MG_EV_HTTP_PART_END, &mp); } else #endif if (io->len > 0 && mg_parse_http(io->buf, io->len, hm, is_req) > 0) { /* * For HTTP messages without Content-Length, always send HTTP message * before MG_EV_CLOSE message. */ int ev2 = is_req ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY; hm->message.len = io->len; hm->body.len = io->buf + io->len - hm->body.p; mg_http_call_endpoint_handler(nc, ev2, hm); } } #ifndef MG_DISABLE_FILESYSTEM if (pd->file.fp != NULL) { mg_http_transfer_file_data(nc); } #endif mg_call(nc, nc->handler, ev, ev_data); if (ev == MG_EV_RECV) { struct mg_str *s; #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART if (pd->mp_stream.boundary != NULL) { mg_http_multipart_continue(nc); return; } #endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ req_len = mg_parse_http(io->buf, io->len, hm, is_req); if (req_len > 0 && (s = mg_get_http_header(hm, "Transfer-Encoding")) != NULL && mg_vcasecmp(s, "chunked") == 0) { mg_handle_chunked(nc, hm, io->buf + req_len, io->len - req_len); } #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART if (req_len > 0 && (s = mg_get_http_header(hm, "Content-Type")) != NULL && s->len >= 9 && strncmp(s->p, "multipart", 9) == 0) { mg_http_multipart_begin(nc, hm, req_len); mg_http_multipart_continue(nc); return; } #endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ /* TODO(alashkin): refactor this ifelseifelseifelseifelse */ if ((req_len < 0 || (req_len == 0 && io->len >= MG_MAX_HTTP_REQUEST_SIZE))) { DBG(("invalid request")); nc->flags |= MG_F_CLOSE_IMMEDIATELY; } else if (req_len == 0) { /* Do nothing, request is not yet fully buffered */ } #ifndef MG_DISABLE_HTTP_WEBSOCKET else if (nc->listener == NULL && mg_get_http_header(hm, "Sec-WebSocket-Accept")) { /* We're websocket client, got handshake response from server. */ /* TODO(lsm): check the validity of accept Sec-WebSocket-Accept */ mbuf_remove(io, req_len); nc->proto_handler = mg_websocket_handler; nc->flags |= MG_F_IS_WEBSOCKET; mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_DONE, NULL); mg_websocket_handler(nc, MG_EV_RECV, ev_data); } else if (nc->listener != NULL && (vec = mg_get_http_header(hm, "Sec-WebSocket-Key")) != NULL) { /* This is a websocket request. Switch protocol handlers. */ mbuf_remove(io, req_len); nc->proto_handler = mg_websocket_handler; nc->flags |= MG_F_IS_WEBSOCKET; /* Send handshake */ mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_REQUEST, hm); if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { if (nc->send_mbuf.len == 0) { mg_ws_handshake(nc, vec); } mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_DONE, NULL); mg_websocket_handler(nc, MG_EV_RECV, ev_data); } } #endif /* MG_DISABLE_HTTP_WEBSOCKET */ else if (hm->message.len <= io->len) { int trigger_ev = nc->listener ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY; /* Whole HTTP message is fully buffered, call event handler */ #ifdef MG_ENABLE_JAVASCRIPT v7_val_t v1, v2, headers, req, args, res; struct v7 *v7 = nc->mgr->v7; const char *ev_name = trigger_ev == MG_EV_HTTP_REPLY ? "onsnd" : "onrcv"; int i, js_callback_handled_request = 0; if (v7 != NULL) { /* Lookup JS callback */ v1 = v7_get(v7, v7_get_global(v7), "Http", ~0); v2 = v7_get(v7, v1, ev_name, ~0); /* Create callback params. TODO(lsm): own/disown those */ args = v7_mk_array(v7); req = v7_mk_object(v7); headers = v7_mk_object(v7); /* Populate request object */ v7_set(v7, req, "method", ~0, v7_mk_string(v7, hm->method.p, hm->method.len, 1)); v7_set(v7, req, "uri", ~0, v7_mk_string(v7, hm->uri.p, hm->uri.len, 1)); v7_set(v7, req, "body", ~0, v7_mk_string(v7, hm->body.p, hm->body.len, 1)); v7_set(v7, req, "headers", ~0, headers); for (i = 0; hm->header_names[i].len > 0; i++) { const struct mg_str *name = &hm->header_names[i]; const struct mg_str *value = &hm->header_values[i]; v7_set(v7, headers, name->p, name->len, v7_mk_string(v7, value->p, value->len, 1)); } /* Invoke callback. TODO(lsm): report errors */ v7_array_push(v7, args, v7_mk_foreign(v7, nc)); v7_array_push(v7, args, req); if (v7_apply(v7, v2, V7_UNDEFINED, args, &res) == V7_OK && v7_is_truthy(v7, res)) { js_callback_handled_request++; } } /* If JS callback returns true, stop request processing */ if (js_callback_handled_request) { nc->flags |= MG_F_SEND_AND_CLOSE; } else { mg_http_call_endpoint_handler(nc, trigger_ev, hm); } #else mg_http_call_endpoint_handler(nc, trigger_ev, hm); #endif mbuf_remove(io, hm->message.len); } } (void) pd; } static size_t mg_get_line_len(const char *buf, size_t buf_len) { size_t len = 0; while (len < buf_len && buf[len] != '\n') len++; return len == buf_len ? 0 : len + 1; } #ifdef MG_ENABLE_HTTP_STREAMING_MULTIPART static void mg_http_multipart_begin(struct mg_connection *nc, struct http_message *hm, int req_len) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); struct mg_str *ct; struct mbuf *io = &nc->recv_mbuf; char boundary[100]; int boundary_len; if (nc->listener == NULL) { /* No streaming for replies now */ goto exit_mp; } ct = mg_get_http_header(hm, "Content-Type"); if (ct == NULL) { /* We need more data - or it isn't multipart mesage */ goto exit_mp; } /* Content-type should start with "multipart" */ if (ct->len < 9 || strncmp(ct->p, "multipart", 9) != 0) { goto exit_mp; } boundary_len = mg_http_parse_header(ct, "boundary", boundary, sizeof(boundary)); if (boundary_len == 0) { /* * Content type is multipart, but there is no boundary, * probably malformed request */ nc->flags = MG_F_CLOSE_IMMEDIATELY; DBG(("invalid request")); goto exit_mp; } /* If we reach this place - that is multipart request */ if (pd->mp_stream.boundary != NULL) { /* * Another streaming request was in progress, * looks like protocol error */ nc->flags |= MG_F_CLOSE_IMMEDIATELY; } else { pd->mp_stream.state = MPS_BEGIN; pd->mp_stream.boundary = strdup(boundary); pd->mp_stream.boundary_len = strlen(boundary); pd->mp_stream.var_name = pd->mp_stream.file_name = NULL; pd->endpoint_handler = mg_http_get_endpoint_handler(nc->listener, &hm->uri); if (pd->endpoint_handler == NULL) { pd->endpoint_handler = nc->handler; } mg_call(nc, pd->endpoint_handler, MG_EV_HTTP_MULTIPART_REQUEST, hm); mbuf_remove(io, req_len); } exit_mp: ; } #define CONTENT_DISPOSITION "Content-Disposition: " static void mg_http_multipart_call_handler(struct mg_connection *c, int ev, const char *data, size_t data_len) { struct mg_http_multipart_part mp; struct mg_http_proto_data *pd = mg_http_get_proto_data(c); memset(&mp, 0, sizeof(mp)); mp.var_name = pd->mp_stream.var_name; mp.file_name = pd->mp_stream.file_name; mp.user_data = pd->mp_stream.user_data; mp.data.p = data; mp.data.len = data_len; mg_call(c, pd->endpoint_handler, ev, &mp); pd->mp_stream.user_data = mp.user_data; } static int mg_http_multipart_got_chunk(struct mg_connection *c) { struct mg_http_proto_data *pd = mg_http_get_proto_data(c); struct mbuf *io = &c->recv_mbuf; mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_DATA, io->buf, pd->mp_stream.prev_io_len); mbuf_remove(io, pd->mp_stream.prev_io_len); pd->mp_stream.prev_io_len = 0; pd->mp_stream.state = MPS_WAITING_FOR_CHUNK; return 0; } static int mg_http_multipart_finalize(struct mg_connection *c) { struct mg_http_proto_data *pd = mg_http_get_proto_data(c); mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0); mg_http_free_proto_data_mp_stream(&pd->mp_stream); pd->mp_stream.state = MPS_FINISHED; return 1; } static int mg_http_multipart_wait_for_boundary(struct mg_connection *c) { const char *boundary; struct mbuf *io = &c->recv_mbuf; struct mg_http_proto_data *pd = mg_http_get_proto_data(c); if ((int) io->len < pd->mp_stream.boundary_len + 2) { return 0; } boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); if (boundary != NULL) { if (io->len - (boundary - io->buf) < 4) { return 0; } if (memcmp(boundary + pd->mp_stream.boundary_len, "--", 2) == 0) { pd->mp_stream.state = MPS_FINALIZE; } else { pd->mp_stream.state = MPS_GOT_BOUNDARY; } } else { return 0; } return 1; } static int mg_http_multipart_process_boundary(struct mg_connection *c) { int data_size; const char *boundary, *block_begin; struct mbuf *io = &c->recv_mbuf; struct mg_http_proto_data *pd = mg_http_get_proto_data(c); char file_name[100], var_name[100]; int line_len; boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); block_begin = boundary + pd->mp_stream.boundary_len + 2; data_size = io->len - (block_begin - io->buf); while (data_size > 0 && (line_len = mg_get_line_len(block_begin, data_size)) != 0) { if (line_len > (int) sizeof(CONTENT_DISPOSITION) && mg_ncasecmp(block_begin, CONTENT_DISPOSITION, sizeof(CONTENT_DISPOSITION) - 1) == 0) { struct mg_str header; header.p = block_begin + sizeof(CONTENT_DISPOSITION) - 1; header.len = line_len - sizeof(CONTENT_DISPOSITION) - 1; mg_http_parse_header(&header, "name", var_name, sizeof(var_name) - 2); mg_http_parse_header(&header, "filename", file_name, sizeof(file_name) - 2); block_begin += line_len; data_size -= line_len; continue; } if (line_len == 2 && mg_ncasecmp(block_begin, "\r\n", 2) == 0) { mbuf_remove(io, block_begin - io->buf + 2); if (pd->mp_stream.processing_part != 0) { mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0); } free((void *) pd->mp_stream.file_name); pd->mp_stream.file_name = strdup(file_name); free((void *) pd->mp_stream.var_name); pd->mp_stream.var_name = strdup(var_name); mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_BEGIN, NULL, 0); pd->mp_stream.state = MPS_WAITING_FOR_CHUNK; pd->mp_stream.processing_part++; return 1; } block_begin += line_len; } pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; return 0; } static int mg_http_multipart_continue_wait_for_chunk(struct mg_connection *c) { struct mg_http_proto_data *pd = mg_http_get_proto_data(c); struct mbuf *io = &c->recv_mbuf; const char *boundary; if ((int) io->len < pd->mp_stream.boundary_len + 6 /* \r\n, --, -- */) { return 0; } boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); if (boundary == NULL && pd->mp_stream.prev_io_len == 0) { pd->mp_stream.prev_io_len = io->len; return 0; } else if (boundary == NULL && (int) io->len > pd->mp_stream.prev_io_len + pd->mp_stream.boundary_len + 4) { pd->mp_stream.state = MPS_GOT_CHUNK; return 1; } else if (boundary != NULL) { int data_size = (boundary - io->buf - 4); mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_DATA, io->buf, data_size); mbuf_remove(io, (boundary - io->buf)); pd->mp_stream.prev_io_len = 0; pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; return 1; } else { return 0; } } static void mg_http_multipart_continue(struct mg_connection *c) { struct mg_http_proto_data *pd = mg_http_get_proto_data(c); while (1) { switch (pd->mp_stream.state) { case MPS_BEGIN: { pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; break; } case MPS_WAITING_FOR_BOUNDARY: { if (mg_http_multipart_wait_for_boundary(c) == 0) { return; } break; } case MPS_GOT_BOUNDARY: { if (mg_http_multipart_process_boundary(c) == 0) { return; } break; } case MPS_WAITING_FOR_CHUNK: { if (mg_http_multipart_continue_wait_for_chunk(c) == 0) { return; } break; } case MPS_GOT_CHUNK: { if (mg_http_multipart_got_chunk(c) == 0) { return; } break; } case MPS_FINALIZE: { if (mg_http_multipart_finalize(c) == 0) { return; } break; } case MPS_FINISHED: { mbuf_remove(&c->recv_mbuf, c->recv_mbuf.len); return; } } } } struct file_upload_state { char *lfn; size_t num_recd; FILE *fp; }; void mg_file_upload_handler(struct mg_connection *nc, int ev, void *ev_data, mg_fu_fname_fn local_name_fn) { switch (ev) { case MG_EV_HTTP_PART_BEGIN: { struct mg_http_multipart_part *mp = (struct mg_http_multipart_part *) ev_data; struct file_upload_state *fus = (struct file_upload_state *) calloc(1, sizeof(*fus)); mp->user_data = NULL; struct mg_str lfn = local_name_fn(nc, mg_mk_str(mp->file_name)); if (lfn.p == NULL || lfn.len == 0) { LOG(LL_ERROR, ("%p Not allowed to upload %s", nc, mp->file_name)); mg_printf(nc, "HTTP/1.1 403 Not Allowed\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Not allowed to upload %s\r\n", mp->file_name); nc->flags |= MG_F_SEND_AND_CLOSE; return; } fus->lfn = (char *) malloc(lfn.len + 1); memcpy(fus->lfn, lfn.p, lfn.len); fus->lfn[lfn.len] = '\0'; if (lfn.p != mp->file_name) free((char *) lfn.p); LOG(LL_DEBUG, ("%p Receiving file %s -> %s", nc, mp->file_name, fus->lfn)); fus->fp = fopen(fus->lfn, "w"); if (fus->fp == NULL) { mg_printf(nc, "HTTP/1.1 500 Internal Server Error\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n"); LOG(LL_ERROR, ("Failed to open %s: %d\n", fus->lfn, errno)); mg_printf(nc, "Failed to open %s: %d\n", fus->lfn, errno); /* Do not close the connection just yet, discard remainder of the data. * This is because at the time of writing some browsers (Chrome) fail to * render response before all the data is sent. */ } mp->user_data = (void *) fus; break; } case MG_EV_HTTP_PART_DATA: { struct mg_http_multipart_part *mp = (struct mg_http_multipart_part *) ev_data; struct file_upload_state *fus = (struct file_upload_state *) mp->user_data; if (fus == NULL || fus->fp == NULL) break; if (fwrite(mp->data.p, 1, mp->data.len, fus->fp) != mp->data.len) { LOG(LL_ERROR, ("Failed to write to %s: %d, wrote %d", fus->lfn, errno, (int) fus->num_recd)); if (errno == ENOSPC #ifdef SPIFFS_ERR_FULL || errno == SPIFFS_ERR_FULL #endif ) { mg_printf(nc, "HTTP/1.1 413 Payload Too Large\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n"); mg_printf(nc, "Failed to write to %s: no space left; wrote %d\r\n", fus->lfn, (int) fus->num_recd); } else { mg_printf(nc, "HTTP/1.1 500 Internal Server Error\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n"); mg_printf(nc, "Failed to write to %s: %d, wrote %d", mp->file_name, errno, (int) fus->num_recd); } fclose(fus->fp); remove(fus->lfn); fus->fp = NULL; /* Do not close the connection just yet, discard remainder of the data. * This is because at the time of writing some browsers (Chrome) fail to * render response before all the data is sent. */ return; } fus->num_recd += mp->data.len; LOG(LL_DEBUG, ("%p rec'd %d bytes, %d total", nc, (int) mp->data.len, (int) fus->num_recd)); break; } case MG_EV_HTTP_PART_END: { struct mg_http_multipart_part *mp = (struct mg_http_multipart_part *) ev_data; struct file_upload_state *fus = (struct file_upload_state *) mp->user_data; if (fus == NULL) break; if (mp->status >= 0 && fus->fp != NULL) { LOG(LL_DEBUG, ("%p Uploaded %s (%s), %d bytes", nc, mp->file_name, fus->lfn, (int) fus->num_recd)); mg_printf(nc, "HTTP/1.1 200 OK\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Ok, %s - %d bytes.\r\n", mp->file_name, (int) fus->num_recd); } else { LOG(LL_ERROR, ("Failed to store %s (%s)", mp->file_name, fus->lfn)); /* * mp->status < 0 means connection was terminated, so no reason to send * HTTP reply */ } if (fus->fp != NULL) fclose(fus->fp); free(fus->lfn); free(fus); mp->user_data = NULL; nc->flags |= MG_F_SEND_AND_CLOSE; break; } } } #endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ void mg_set_protocol_http_websocket(struct mg_connection *nc) { nc->proto_handler = mg_http_handler; } #ifndef MG_DISABLE_HTTP_WEBSOCKET void mg_send_websocket_handshake2(struct mg_connection *nc, const char *path, const char *host, const char *protocol, const char *extra_headers) { char key[25]; uint32_t nonce[4]; nonce[0] = mg_ws_random_mask(); nonce[1] = mg_ws_random_mask(); nonce[2] = mg_ws_random_mask(); nonce[3] = mg_ws_random_mask(); mg_base64_encode((unsigned char *) &nonce, sizeof(nonce), key); mg_printf(nc, "GET %s HTTP/1.1\r\n" "Upgrade: websocket\r\n" "Connection: Upgrade\r\n" "Sec-WebSocket-Version: 13\r\n" "Sec-WebSocket-Key: %s\r\n", path, key); /* TODO(mkm): take default hostname from http proto data if host == NULL */ if (host != MG_WS_NO_HOST_HEADER_MAGIC) { mg_printf(nc, "Host: %s\r\n", host); } if (protocol != NULL) { mg_printf(nc, "Sec-WebSocket-Protocol: %s\r\n", protocol); } if (extra_headers != NULL) { mg_printf(nc, "%s", extra_headers); } mg_printf(nc, "\r\n"); } void mg_send_websocket_handshake(struct mg_connection *nc, const char *path, const char *extra_headers) { mg_send_websocket_handshake2(nc, path, MG_WS_NO_HOST_HEADER_MAGIC, NULL, extra_headers); } #endif /* MG_DISABLE_HTTP_WEBSOCKET */ void mg_send_response_line_s(struct mg_connection *nc, int status_code, const struct mg_str extra_headers) { const char *status_message = "OK"; switch (status_code) { case 206: status_message = "Partial Content"; break; case 301: status_message = "Moved"; break; case 302: status_message = "Found"; break; case 401: status_message = "Unauthorized"; break; case 403: status_message = "Forbidden"; break; case 404: status_message = "Not Found"; break; case 416: status_message = "Requested range not satisfiable"; break; case 418: status_message = "I'm a teapot"; break; case 500: status_message = "Internal Server Error"; break; } mg_printf(nc, "HTTP/1.1 %d %s\r\nServer: %s\r\n", status_code, status_message, mg_version_header); if (extra_headers.len > 0) { mg_printf(nc, "%.*s\r\n", (int) extra_headers.len, extra_headers.p); } } void mg_send_response_line(struct mg_connection *nc, int status_code, const char *extra_headers) { mg_send_response_line_s(nc, status_code, mg_mk_str(extra_headers)); } void mg_send_head(struct mg_connection *c, int status_code, int64_t content_length, const char *extra_headers) { mg_send_response_line(c, status_code, extra_headers); if (content_length < 0) { mg_printf(c, "%s", "Transfer-Encoding: chunked\r\n"); } else { mg_printf(c, "Content-Length: %" INT64_FMT "\r\n", content_length); } mg_send(c, "\r\n", 2); } #ifdef MG_DISABLE_FILESYSTEM void mg_serve_http(struct mg_connection *nc, struct http_message *hm, struct mg_serve_http_opts opts) { mg_send_head(nc, 501, 0, NULL); } #else static void mg_http_send_error(struct mg_connection *nc, int code, const char *reason) { if (!reason) reason = ""; DBG(("%p %d %s", nc, code, reason)); mg_send_head(nc, code, strlen(reason), "Content-Type: text/plain\r\nConnection: close"); mg_send(nc, reason, strlen(reason)); nc->flags |= MG_F_SEND_AND_CLOSE; } #ifndef MG_DISABLE_SSI static void mg_send_ssi_file(struct mg_connection *, const char *, FILE *, int, const struct mg_serve_http_opts *); static void mg_send_file_data(struct mg_connection *nc, FILE *fp) { char buf[BUFSIZ]; size_t n; while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) { mg_send(nc, buf, n); } } static void mg_do_ssi_include(struct mg_connection *nc, const char *ssi, char *tag, int include_level, const struct mg_serve_http_opts *opts) { char file_name[BUFSIZ], path[MAX_PATH_SIZE], *p; FILE *fp; /* * sscanf() is safe here, since send_ssi_file() also uses buffer * of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN. */ if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { /* File name is relative to the webserver root */ snprintf(path, sizeof(path), "%s/%s", opts->document_root, file_name); } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) { /* * File name is relative to the webserver working directory * or it is absolute system path */ snprintf(path, sizeof(path), "%s", file_name); } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 || sscanf(tag, " \"%[^\"]\"", file_name) == 1) { /* File name is relative to the currect document */ snprintf(path, sizeof(path), "%s", ssi); if ((p = strrchr(path, DIRSEP)) != NULL) { p[1] = '\0'; } snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s", file_name); } else { mg_printf(nc, "Bad SSI #include: [%s]", tag); return; } if ((fp = fopen(path, "rb")) == NULL) { mg_printf(nc, "SSI include error: fopen(%s): %s", path, strerror(errno)); } else { mg_set_close_on_exec(fileno(fp)); if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) > 0) { mg_send_ssi_file(nc, path, fp, include_level + 1, opts); } else { mg_send_file_data(nc, fp); } fclose(fp); } } #ifndef MG_DISABLE_POPEN static void do_ssi_exec(struct mg_connection *nc, char *tag) { char cmd[BUFSIZ]; FILE *fp; if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { mg_printf(nc, "Bad SSI #exec: [%s]", tag); } else if ((fp = popen(cmd, "r")) == NULL) { mg_printf(nc, "Cannot SSI #exec: [%s]: %s", cmd, strerror(errno)); } else { mg_send_file_data(nc, fp); pclose(fp); } } #endif /* !MG_DISABLE_POPEN */ static void mg_do_ssi_call(struct mg_connection *nc, char *tag) { mg_call(nc, NULL, MG_EV_SSI_CALL, tag); } /* * SSI directive has the following format: * */ static void mg_send_ssi_file(struct mg_connection *nc, const char *path, FILE *fp, int include_level, const struct mg_serve_http_opts *opts) { static const struct mg_str btag = MG_MK_STR(" */ buf[i--] = '\0'; while (i > 0 && buf[i] == ' ') { buf[i--] = '\0'; } /* Handle known SSI directives */ if (memcmp(p, d_include.p, d_include.len) == 0) { mg_do_ssi_include(nc, path, p + d_include.len + 1, include_level, opts); } else if (memcmp(p, d_call.p, d_call.len) == 0) { mg_do_ssi_call(nc, p + d_call.len + 1); #ifndef MG_DISABLE_POPEN } else if (memcmp(p, d_exec.p, d_exec.len) == 0) { do_ssi_exec(nc, p + d_exec.len + 1); #endif } else { /* Silently ignore unknown SSI directive. */ } len = 0; } else if (ch == '<') { in_ssi_tag = 1; if (len > 0) { mg_send(nc, buf, (size_t) len); } len = 0; buf[len++] = ch & 0xff; } else if (in_ssi_tag) { if (len == (int) btag.len && memcmp(buf, btag.p, btag.len) != 0) { /* Not an SSI tag */ in_ssi_tag = 0; } else if (len == (int) sizeof(buf) - 2) { mg_printf(nc, "%s: SSI tag is too large", path); len = 0; } buf[len++] = ch & 0xff; } else { buf[len++] = ch & 0xff; if (len == (int) sizeof(buf)) { mg_send(nc, buf, (size_t) len); len = 0; } } } /* Send the rest of buffered data */ if (len > 0) { mg_send(nc, buf, (size_t) len); } } static void mg_handle_ssi_request(struct mg_connection *nc, const char *path, const struct mg_serve_http_opts *opts) { FILE *fp; struct mg_str mime_type; DBG(("%p %s", nc, path)); if ((fp = fopen(path, "rb")) == NULL) { mg_http_send_error(nc, 404, NULL); } else { mg_set_close_on_exec(fileno(fp)); mime_type = mg_get_mime_type(path, "text/plain", opts); mg_send_response_line(nc, 200, opts->extra_headers); mg_printf(nc, "Content-Type: %.*s\r\n" "Connection: close\r\n\r\n", (int) mime_type.len, mime_type.p); mg_send_ssi_file(nc, path, fp, 0, opts); fclose(fp); nc->flags |= MG_F_SEND_AND_CLOSE; } } #else static void mg_handle_ssi_request(struct mg_connection *nc, const char *path, const struct mg_serve_http_opts *opts) { (void) path; (void) opts; mg_http_send_error(nc, 500, "SSI disabled"); } #endif /* MG_DISABLE_SSI */ static void mg_http_construct_etag(char *buf, size_t buf_len, const cs_stat_t *st) { snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", (unsigned long) st->st_mtime, (int64_t) st->st_size); } static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t) { strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); } static int mg_http_parse_range_header(const struct mg_str *header, int64_t *a, int64_t *b) { /* * There is no snscanf. Headers are not guaranteed to be NUL-terminated, * so we have this. Ugh. */ int result; char *p = (char *) MG_MALLOC(header->len + 1); if (p == NULL) return 0; memcpy(p, header->p, header->len); p[header->len] = '\0'; result = sscanf(p, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); MG_FREE(p); return result; } void mg_http_serve_file(struct mg_connection *nc, struct http_message *hm, const char *path, const struct mg_str mime_type, const struct mg_str extra_headers) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); cs_stat_t st; DBG(("%p [%s] %.*s", nc, path, (int) mime_type.len, mime_type.p)); if (mg_stat(path, &st) != 0 || (pd->file.fp = fopen(path, "rb")) == NULL) { int code; switch (errno) { case EACCES: code = 403; break; case ENOENT: code = 404; break; default: code = 500; }; mg_http_send_error(nc, code, "Open failed"); } else { char etag[50], current_time[50], last_modified[50], range[70]; time_t t = time(NULL); int64_t r1 = 0, r2 = 0, cl = st.st_size; struct mg_str *range_hdr = mg_get_http_header(hm, "Range"); int n, status_code = 200; /* Handle Range header */ range[0] = '\0'; if (range_hdr != NULL && (n = mg_http_parse_range_header(range_hdr, &r1, &r2)) > 0 && r1 >= 0 && r2 >= 0) { /* If range is specified like "400-", set second limit to content len */ if (n == 1) { r2 = cl - 1; } if (r1 > r2 || r2 >= cl) { status_code = 416; cl = 0; snprintf(range, sizeof(range), "Content-Range: bytes */%" INT64_FMT "\r\n", (int64_t) st.st_size); } else { status_code = 206; cl = r2 - r1 + 1; snprintf(range, sizeof(range), "Content-Range: bytes %" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n", r1, r1 + cl - 1, (int64_t) st.st_size); #if _FILE_OFFSET_BITS == 64 || _POSIX_C_SOURCE >= 200112L || \ _XOPEN_SOURCE >= 600 fseeko(pd->file.fp, r1, SEEK_SET); #else fseek(pd->file.fp, (long) r1, SEEK_SET); #endif } } #ifndef MG_DISABLE_HTTP_KEEP_ALIVE { struct mg_str *conn_hdr = mg_get_http_header(hm, "Connection"); if (conn_hdr != NULL) { pd->file.keepalive = (mg_vcasecmp(conn_hdr, "keep-alive") == 0); } else { pd->file.keepalive = (mg_vcmp(&hm->proto, "HTTP/1.1") == 0); } } #endif mg_http_construct_etag(etag, sizeof(etag), &st); mg_gmt_time_string(current_time, sizeof(current_time), &t); mg_gmt_time_string(last_modified, sizeof(last_modified), &st.st_mtime); /* * Content length casted to size_t because: * 1) that's the maximum buffer size anyway * 2) ESP8266 RTOS SDK newlib vprintf cannot contain a 64bit arg at non-last * position * TODO(mkm): fix ESP8266 RTOS SDK */ mg_send_response_line_s(nc, status_code, extra_headers); mg_printf(nc, "Date: %s\r\n" "Last-Modified: %s\r\n" "Accept-Ranges: bytes\r\n" "Content-Type: %.*s\r\n" "Connection: %s\r\n" "Content-Length: %" SIZE_T_FMT "\r\n" "%sEtag: %s\r\n\r\n", current_time, last_modified, (int) mime_type.len, mime_type.p, (pd->file.keepalive ? "keep-alive" : "close"), (size_t) cl, range, etag); pd->file.cl = cl; pd->file.type = DATA_FILE; mg_http_transfer_file_data(nc); } } static void mg_http_serve_file2(struct mg_connection *nc, const char *path, struct http_message *hm, struct mg_serve_http_opts *opts) { if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) > 0) { mg_handle_ssi_request(nc, path, opts); return; } mg_http_serve_file(nc, hm, path, mg_get_mime_type(path, "text/plain", opts), mg_mk_str(opts->extra_headers)); } #endif int mg_url_decode(const char *src, int src_len, char *dst, int dst_len, int is_form_url_encoded) { int i, j, a, b; #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { if (src[i] == '%') { if (i < src_len - 2 && isxdigit(*(const unsigned char *) (src + i + 1)) && isxdigit(*(const unsigned char *) (src + i + 2))) { a = tolower(*(const unsigned char *) (src + i + 1)); b = tolower(*(const unsigned char *) (src + i + 2)); dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); i += 2; } else { return -1; } } else if (is_form_url_encoded && src[i] == '+') { dst[j] = ' '; } else { dst[j] = src[i]; } } dst[j] = '\0'; /* Null-terminate the destination */ return i >= src_len ? j : -1; } int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst, size_t dst_len) { const char *p, *e, *s; size_t name_len; int len; if (dst == NULL || dst_len == 0) { len = -2; } else if (buf->p == NULL || name == NULL || buf->len == 0) { len = -1; dst[0] = '\0'; } else { name_len = strlen(name); e = buf->p + buf->len; len = -1; dst[0] = '\0'; for (p = buf->p; p + name_len < e; p++) { if ((p == buf->p || p[-1] == '&') && p[name_len] == '=' && !mg_ncasecmp(name, p, name_len)) { p += name_len + 1; s = (const char *) memchr(p, '&', (size_t)(e - p)); if (s == NULL) { s = e; } len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); if (len == -1) { len = -2; } break; } } } return len; } void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len) { char chunk_size[50]; int n; n = snprintf(chunk_size, sizeof(chunk_size), "%lX\r\n", (unsigned long) len); mg_send(nc, chunk_size, n); mg_send(nc, buf, len); mg_send(nc, "\r\n", 2); } void mg_printf_http_chunk(struct mg_connection *nc, const char *fmt, ...) { char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; int len; va_list ap; va_start(ap, fmt); len = mg_avprintf(&buf, sizeof(mem), fmt, ap); va_end(ap); if (len >= 0) { mg_send_http_chunk(nc, buf, len); } /* LCOV_EXCL_START */ if (buf != mem && buf != NULL) { MG_FREE(buf); } /* LCOV_EXCL_STOP */ } void mg_printf_html_escape(struct mg_connection *nc, const char *fmt, ...) { char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; int i, j, len; va_list ap; va_start(ap, fmt); len = mg_avprintf(&buf, sizeof(mem), fmt, ap); va_end(ap); if (len >= 0) { for (i = j = 0; i < len; i++) { if (buf[i] == '<' || buf[i] == '>') { mg_send(nc, buf + j, i - j); mg_send(nc, buf[i] == '<' ? "<" : ">", 4); j = i + 1; } } mg_send(nc, buf + j, i - j); } /* LCOV_EXCL_START */ if (buf != mem && buf != NULL) { MG_FREE(buf); } /* LCOV_EXCL_STOP */ } int mg_http_parse_header(struct mg_str *hdr, const char *var_name, char *buf, size_t buf_size) { int ch = ' ', ch1 = ',', len = 0, n = strlen(var_name); const char *p, *end = hdr ? hdr->p + hdr->len : NULL, *s = NULL; if (buf != NULL && buf_size > 0) buf[0] = '\0'; if (hdr == NULL) return 0; /* Find where variable starts */ for (s = hdr->p; s != NULL && s + n < end; s++) { if ((s == hdr->p || s[-1] == ch || s[-1] == ch1) && s[n] == '=' && !memcmp(s, var_name, n)) break; } if (s != NULL && &s[n + 1] < end) { s += n + 1; if (*s == '"' || *s == '\'') { ch = ch1 = *s++; } p = s; while (p < end && p[0] != ch && p[0] != ch1 && len < (int) buf_size) { if (ch != ' ' && p[0] == '\\' && p[1] == ch) p++; buf[len++] = *p++; } if (len >= (int) buf_size || (ch != ' ' && *p != ch)) { len = 0; } else { if (len > 0 && s[len - 1] == ',') len--; if (len > 0 && s[len - 1] == ';') len--; buf[len] = '\0'; } } return len; } #ifndef MG_DISABLE_FILESYSTEM static int mg_is_file_hidden(const char *path, const struct mg_serve_http_opts *opts, int exclude_specials) { const char *p1 = opts->per_directory_auth_file; const char *p2 = opts->hidden_file_pattern; /* Strip directory path from the file name */ const char *pdir = strrchr(path, DIRSEP); if (pdir != NULL) { path = pdir + 1; } return (exclude_specials && (!strcmp(path, ".") || !strcmp(path, ".."))) || (p1 != NULL && mg_match_prefix(p1, strlen(p1), path) == (int) strlen(p1)) || (p2 != NULL && mg_match_prefix(p2, strlen(p2), path) > 0); } #ifndef MG_DISABLE_HTTP_DIGEST_AUTH static void mg_mkmd5resp(const char *method, size_t method_len, const char *uri, size_t uri_len, const char *ha1, size_t ha1_len, const char *nonce, size_t nonce_len, const char *nc, size_t nc_len, const char *cnonce, size_t cnonce_len, const char *qop, size_t qop_len, char *resp) { static const char colon[] = ":"; static const size_t one = 1; char ha2[33]; cs_md5(ha2, method, method_len, colon, one, uri, uri_len, NULL); cs_md5(resp, ha1, ha1_len, colon, one, nonce, nonce_len, colon, one, nc, nc_len, colon, one, cnonce, cnonce_len, colon, one, qop, qop_len, colon, one, ha2, sizeof(ha2) - 1, NULL); } int mg_http_create_digest_auth_header(char *buf, size_t buf_len, const char *method, const char *uri, const char *auth_domain, const char *user, const char *passwd) { static const char colon[] = ":", qop[] = "auth"; static const size_t one = 1; char ha1[33], resp[33], cnonce[40]; snprintf(cnonce, sizeof(cnonce), "%x", (unsigned int) time(NULL)); cs_md5(ha1, user, (size_t) strlen(user), colon, one, auth_domain, (size_t) strlen(auth_domain), colon, one, passwd, (size_t) strlen(passwd), NULL); mg_mkmd5resp(method, strlen(method), uri, strlen(uri), ha1, sizeof(ha1) - 1, cnonce, strlen(cnonce), "1", one, cnonce, strlen(cnonce), qop, sizeof(qop) - 1, resp); return snprintf(buf, buf_len, "Authorization: Digest username=\"%s\"," "realm=\"%s\",uri=\"%s\",qop=%s,nc=1,cnonce=%s," "nonce=%s,response=%s\r\n", user, auth_domain, uri, qop, cnonce, cnonce, resp); } /* * Check for authentication timeout. * Clients send time stamp encoded in nonce. Make sure it is not too old, * to prevent replay attacks. * Assumption: nonce is a hexadecimal number of seconds since 1970. */ static int mg_check_nonce(const char *nonce) { unsigned long now = (unsigned long) time(NULL); unsigned long val = (unsigned long) strtoul(nonce, NULL, 16); return now < val || now - val < 3600; } int mg_http_check_digest_auth(struct http_message *hm, const char *auth_domain, FILE *fp) { struct mg_str *hdr; char buf[128], f_user[sizeof(buf)], f_ha1[sizeof(buf)], f_domain[sizeof(buf)]; char user[50], cnonce[33], response[40], uri[200], qop[20], nc[20], nonce[30]; char expected_response[33]; /* Parse "Authorization:" header, fail fast on parse error */ if (hm == NULL || fp == NULL || (hdr = mg_get_http_header(hm, "Authorization")) == NULL || mg_http_parse_header(hdr, "username", user, sizeof(user)) == 0 || mg_http_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce)) == 0 || mg_http_parse_header(hdr, "response", response, sizeof(response)) == 0 || mg_http_parse_header(hdr, "uri", uri, sizeof(uri)) == 0 || mg_http_parse_header(hdr, "qop", qop, sizeof(qop)) == 0 || mg_http_parse_header(hdr, "nc", nc, sizeof(nc)) == 0 || mg_http_parse_header(hdr, "nonce", nonce, sizeof(nonce)) == 0 || mg_check_nonce(nonce) == 0) { return 0; } /* * Read passwords file line by line. If should have htdigest format, * i.e. each line should be a colon-separated sequence: * USER_NAME:DOMAIN_NAME:HA1_HASH_OF_USER_DOMAIN_AND_PASSWORD */ while (fgets(buf, sizeof(buf), fp) != NULL) { if (sscanf(buf, "%[^:]:%[^:]:%s", f_user, f_domain, f_ha1) == 3 && strcmp(user, f_user) == 0 && /* NOTE(lsm): due to a bug in MSIE, we do not compare URIs */ strcmp(auth_domain, f_domain) == 0) { /* User and domain matched, check the password */ mg_mkmd5resp( hm->method.p, hm->method.len, hm->uri.p, hm->uri.len + (hm->query_string.len ? hm->query_string.len + 1 : 0), f_ha1, strlen(f_ha1), nonce, strlen(nonce), nc, strlen(nc), cnonce, strlen(cnonce), qop, strlen(qop), expected_response); return mg_casecmp(response, expected_response) == 0; } } /* None of the entries in the passwords file matched - return failure */ return 0; } static int mg_is_authorized(struct http_message *hm, const char *path, int is_directory, const char *domain, const char *passwords_file, int is_global_pass_file) { char buf[MG_MAX_PATH]; const char *p; FILE *fp; int authorized = 1; if (domain != NULL && passwords_file != NULL) { if (is_global_pass_file) { fp = fopen(passwords_file, "r"); } else if (is_directory) { snprintf(buf, sizeof(buf), "%s%c%s", path, DIRSEP, passwords_file); fp = fopen(buf, "r"); } else { p = strrchr(path, DIRSEP); if (p == NULL) p = path; snprintf(buf, sizeof(buf), "%.*s%c%s", (int) (p - path), path, DIRSEP, passwords_file); fp = fopen(buf, "r"); } if (fp != NULL) { authorized = mg_http_check_digest_auth(hm, domain, fp); fclose(fp); } } DBG(("%s %s %d %d", path, passwords_file ? passwords_file : "", is_global_pass_file, authorized)); return authorized; } #else static int mg_is_authorized(struct http_message *hm, const char *path, int is_directory, const char *domain, const char *passwords_file, int is_global_pass_file) { (void) hm; (void) path; (void) is_directory; (void) domain; (void) passwords_file; (void) is_global_pass_file; return 1; } #endif #ifndef MG_DISABLE_DIRECTORY_LISTING static size_t mg_url_encode(const char *src, size_t s_len, char *dst, size_t dst_len) { static const char *dont_escape = "._-$,;~()/"; static const char *hex = "0123456789abcdef"; size_t i = 0, j = 0; for (i = j = 0; dst_len > 0 && i < s_len && j + 2 < dst_len - 1; i++, j++) { if (isalnum(*(const unsigned char *) (src + i)) || strchr(dont_escape, *(const unsigned char *) (src + i)) != NULL) { dst[j] = src[i]; } else if (j + 3 < dst_len) { dst[j] = '%'; dst[j + 1] = hex[(*(const unsigned char *) (src + i)) >> 4]; dst[j + 2] = hex[(*(const unsigned char *) (src + i)) & 0xf]; j += 2; } } dst[j] = '\0'; return j; } static void mg_escape(const char *src, char *dst, size_t dst_len) { size_t n = 0; while (*src != '\0' && n + 5 < dst_len) { unsigned char ch = *(unsigned char *) src++; if (ch == '<') { n += snprintf(dst + n, dst_len - n, "%s", "<"); } else { dst[n++] = ch; } } dst[n] = '\0'; } static void mg_print_dir_entry(struct mg_connection *nc, const char *file_name, cs_stat_t *stp) { char size[64], mod[64], href[MAX_PATH_SIZE * 3], path[MAX_PATH_SIZE]; int64_t fsize = stp->st_size; int is_dir = S_ISDIR(stp->st_mode); const char *slash = is_dir ? "/" : ""; if (is_dir) { snprintf(size, sizeof(size), "%s", "[DIRECTORY]"); } else { /* * We use (double) cast below because MSVC 6 compiler cannot * convert unsigned __int64 to double. */ if (fsize < 1024) { snprintf(size, sizeof(size), "%d", (int) fsize); } else if (fsize < 0x100000) { snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0); } else if (fsize < 0x40000000) { snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576); } else { snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824); } } strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime)); mg_escape(file_name, path, sizeof(path)); mg_url_encode(file_name, strlen(file_name), href, sizeof(href)); mg_printf_http_chunk(nc, "%s%s" "%s%s\n", href, slash, path, slash, mod, is_dir ? -1 : fsize, size); } static void mg_scan_directory(struct mg_connection *nc, const char *dir, const struct mg_serve_http_opts *opts, void (*func)(struct mg_connection *, const char *, cs_stat_t *)) { char path[MAX_PATH_SIZE]; cs_stat_t st; struct dirent *dp; DIR *dirp; DBG(("%p [%s]", nc, dir)); if ((dirp = (opendir(dir))) != NULL) { while ((dp = readdir(dirp)) != NULL) { /* Do not show current dir and hidden files */ if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) { continue; } snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name); if (mg_stat(path, &st) == 0) { func(nc, (const char *) dp->d_name, &st); } } closedir(dirp); } else { DBG(("%p opendir(%s) -> %d", nc, dir, errno)); } } static void mg_send_directory_listing(struct mg_connection *nc, const char *dir, struct http_message *hm, struct mg_serve_http_opts *opts) { static const char *sort_js_code = ""; mg_send_response_line(nc, 200, opts->extra_headers); mg_printf(nc, "%s: %s\r\n%s: %s\r\n\r\n", "Transfer-Encoding", "chunked", "Content-Type", "text/html; charset=utf-8"); mg_printf_http_chunk( nc, "Index of %.*s%s%s" "\n" "

Index of %.*s

\n" "" "\n" "\n" "", (int) hm->uri.len, hm->uri.p, sort_js_code, sort_js_code2, (int) hm->uri.len, hm->uri.p); mg_scan_directory(nc, dir, opts, mg_print_dir_entry); mg_printf_http_chunk(nc, "\n" "
Name" "Modified" "Size
\n" "
%s
\n" "", mg_version_header); mg_send_http_chunk(nc, "", 0); /* TODO(rojer): Remove when cesanta/dev/issues/197 is fixed. */ nc->flags |= MG_F_SEND_AND_CLOSE; } #endif /* MG_DISABLE_DIRECTORY_LISTING */ #ifndef MG_DISABLE_DAV static void mg_print_props(struct mg_connection *nc, const char *name, cs_stat_t *stp) { char mtime[64], buf[MAX_PATH_SIZE * 3]; time_t t = stp->st_mtime; /* store in local variable for NDK compile */ mg_gmt_time_string(mtime, sizeof(mtime), &t); mg_url_encode(name, strlen(name), buf, sizeof(buf)); mg_printf(nc, "" "%s" "" "" "%s" "%" INT64_FMT "" "%s" "" "HTTP/1.1 200 OK" "" "\n", buf, S_ISDIR(stp->st_mode) ? "" : "", (int64_t) stp->st_size, mtime); } static void mg_handle_propfind(struct mg_connection *nc, const char *path, cs_stat_t *stp, struct http_message *hm, struct mg_serve_http_opts *opts) { static const char header[] = "HTTP/1.1 207 Multi-Status\r\n" "Connection: close\r\n" "Content-Type: text/xml; charset=utf-8\r\n\r\n" "" "\n"; static const char footer[] = "\n"; const struct mg_str *depth = mg_get_http_header(hm, "Depth"); /* Print properties for the requested resource itself */ if (S_ISDIR(stp->st_mode) && strcmp(opts->enable_directory_listing, "yes") != 0) { mg_printf(nc, "%s", "HTTP/1.1 403 Directory Listing Denied\r\n\r\n"); } else { char uri[MAX_PATH_SIZE]; mg_send(nc, header, sizeof(header) - 1); snprintf(uri, sizeof(uri), "%.*s", (int) hm->uri.len, hm->uri.p); mg_print_props(nc, uri, stp); if (S_ISDIR(stp->st_mode) && (depth == NULL || mg_vcmp(depth, "0") != 0)) { mg_scan_directory(nc, path, opts, mg_print_props); } mg_send(nc, footer, sizeof(footer) - 1); nc->flags |= MG_F_SEND_AND_CLOSE; } } #ifdef MG_ENABLE_FAKE_DAVLOCK /* * Windows explorer (probably there are another WebDav clients like it) * requires LOCK support in webdav. W/out this, it still works, but fails * to save file: shows error message and offers "Save As". * "Save as" works, but this message is very annoying. * This is fake lock, which doesn't lock something, just returns LOCK token, * UNLOCK always answers "OK". * With this fake LOCK Windows Explorer looks happy and saves file. * NOTE: that is not DAV LOCK imlementation, it is just a way to shut up * Windows native DAV client. This is why FAKE LOCK is not enabed by default */ static void mg_handle_lock(struct mg_connection *nc, const char *path) { static const char *reply = "HTTP/1.1 207 Multi-Status\r\n" "Connection: close\r\n" "Content-Type: text/xml; charset=utf-8\r\n\r\n" "" "\n" "\n" "\n" "\n" "\n" "opaquelocktoken:%s%u" "" "" "\n" "" "\n"; mg_printf(nc, reply, path, (unsigned int) time(NULL)); nc->flags |= MG_F_SEND_AND_CLOSE; } #endif static void mg_handle_mkcol(struct mg_connection *nc, const char *path, struct http_message *hm) { int status_code = 500; if (hm->body.len != (size_t) ~0 && hm->body.len > 0) { status_code = 415; } else if (!mg_mkdir(path, 0755)) { status_code = 201; } else if (errno == EEXIST) { status_code = 405; } else if (errno == EACCES) { status_code = 403; } else if (errno == ENOENT) { status_code = 409; } else { status_code = 500; } mg_http_send_error(nc, status_code, NULL); } static int mg_remove_directory(const struct mg_serve_http_opts *opts, const char *dir) { char path[MAX_PATH_SIZE]; struct dirent *dp; cs_stat_t st; DIR *dirp; if ((dirp = opendir(dir)) == NULL) return 0; while ((dp = readdir(dirp)) != NULL) { if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) { continue; } snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); mg_stat(path, &st); if (S_ISDIR(st.st_mode)) { mg_remove_directory(opts, path); } else { remove(path); } } closedir(dirp); rmdir(dir); return 1; } static void mg_handle_move(struct mg_connection *c, const struct mg_serve_http_opts *opts, const char *path, struct http_message *hm) { const struct mg_str *dest = mg_get_http_header(hm, "Destination"); if (dest == NULL) { mg_http_send_error(c, 411, NULL); } else { const char *p = (char *) memchr(dest->p, '/', dest->len); if (p != NULL && p[1] == '/' && (p = (char *) memchr(p + 2, '/', dest->p + dest->len - p)) != NULL) { char buf[MAX_PATH_SIZE]; snprintf(buf, sizeof(buf), "%s%.*s", opts->dav_document_root, (int) (dest->p + dest->len - p), p); if (rename(path, buf) == 0) { mg_http_send_error(c, 200, NULL); } else { mg_http_send_error(c, 418, NULL); } } else { mg_http_send_error(c, 500, NULL); } } } static void mg_handle_delete(struct mg_connection *nc, const struct mg_serve_http_opts *opts, const char *path) { cs_stat_t st; if (mg_stat(path, &st) != 0) { mg_http_send_error(nc, 404, NULL); } else if (S_ISDIR(st.st_mode)) { mg_remove_directory(opts, path); mg_http_send_error(nc, 204, NULL); } else if (remove(path) == 0) { mg_http_send_error(nc, 204, NULL); } else { mg_http_send_error(nc, 423, NULL); } } /* Return -1 on error, 1 on success. */ static int mg_create_itermediate_directories(const char *path) { const char *s; /* Create intermediate directories if they do not exist */ for (s = path + 1; *s != '\0'; s++) { if (*s == '/') { char buf[MAX_PATH_SIZE]; cs_stat_t st; snprintf(buf, sizeof(buf), "%.*s", (int) (s - path), path); buf[sizeof(buf) - 1] = '\0'; if (mg_stat(buf, &st) != 0 && mg_mkdir(buf, 0755) != 0) { return -1; } } } return 1; } static void mg_handle_put(struct mg_connection *nc, const char *path, struct http_message *hm) { struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); cs_stat_t st; const struct mg_str *cl_hdr = mg_get_http_header(hm, "Content-Length"); int rc, status_code = mg_stat(path, &st) == 0 ? 200 : 201; mg_http_free_proto_data_file(&pd->file); if ((rc = mg_create_itermediate_directories(path)) == 0) { mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code); } else if (rc == -1) { mg_http_send_error(nc, 500, NULL); } else if (cl_hdr == NULL) { mg_http_send_error(nc, 411, NULL); } else if ((pd->file.fp = fopen(path, "w+b")) == NULL) { mg_http_send_error(nc, 500, NULL); } else { const struct mg_str *range_hdr = mg_get_http_header(hm, "Content-Range"); int64_t r1 = 0, r2 = 0; pd->file.type = DATA_PUT; mg_set_close_on_exec(fileno(pd->file.fp)); pd->file.cl = to64(cl_hdr->p); if (range_hdr != NULL && mg_http_parse_range_header(range_hdr, &r1, &r2) > 0) { status_code = 206; fseeko(pd->file.fp, r1, SEEK_SET); pd->file.cl = r2 > r1 ? r2 - r1 + 1 : pd->file.cl - r1; } mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code); /* Remove HTTP request from the mbuf, leave only payload */ mbuf_remove(&nc->recv_mbuf, hm->message.len - hm->body.len); mg_http_transfer_file_data(nc); } } #endif /* MG_DISABLE_DAV */ static int mg_is_dav_request(const struct mg_str *s) { static const char *methods[] = {"PUT", "DELETE", "MKCOL", "PROPFIND", "MOVE" #ifdef MG_ENABLE_FAKE_DAVLOCK , "LOCK", "UNLOCK" #endif }; size_t i; for (i = 0; i < ARRAY_SIZE(methods); i++) { if (mg_vcmp(s, methods[i]) == 0) { return 1; } } return 0; } /* * Given a directory path, find one of the files specified in the * comma-separated list of index files `list`. * First found index file wins. If an index file is found, then gets * appended to the `path`, stat-ed, and result of `stat()` passed to `stp`. * If index file is not found, then `path` and `stp` remain unchanged. */ MG_INTERNAL void mg_find_index_file(const char *path, const char *list, char **index_file, cs_stat_t *stp) { struct mg_str vec; size_t path_len = strlen(path); int found = 0; *index_file = NULL; /* Traverse index files list. For each entry, append it to the given */ /* path and see if the file exists. If it exists, break the loop */ while ((list = mg_next_comma_list_entry(list, &vec, NULL)) != NULL) { cs_stat_t st; size_t len = path_len + 1 + vec.len + 1; *index_file = (char *) MG_REALLOC(*index_file, len); if (*index_file == NULL) break; snprintf(*index_file, len, "%s%c%.*s", path, DIRSEP, (int) vec.len, vec.p); /* Does it exist? Is it a file? */ if (mg_stat(*index_file, &st) == 0 && S_ISREG(st.st_mode)) { /* Yes it does, break the loop */ *stp = st; found = 1; break; } } if (!found) { MG_FREE(*index_file); *index_file = NULL; } DBG(("[%s] [%s]", path, (*index_file ? *index_file : ""))); } static int mg_http_send_port_based_redirect( struct mg_connection *c, struct http_message *hm, const struct mg_serve_http_opts *opts) { const char *rewrites = opts->url_rewrites; struct mg_str a, b; char local_port[20] = {'%'}; mg_conn_addr_to_str(c, local_port + 1, sizeof(local_port) - 1, MG_SOCK_STRINGIFY_PORT); while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) { if (mg_vcmp(&a, local_port) == 0) { mg_send_response_line(c, 301, NULL); mg_printf(c, "Content-Length: 0\r\nLocation: %.*s%.*s\r\n\r\n", (int) b.len, b.p, (int) (hm->proto.p - hm->uri.p - 1), hm->uri.p); return 1; } } return 0; } MG_INTERNAL int mg_uri_to_local_path(struct http_message *hm, const struct mg_serve_http_opts *opts, char **local_path, struct mg_str *remainder) { int ok = 1; const char *cp = hm->uri.p, *cp_end = hm->uri.p + hm->uri.len; struct mg_str root = {NULL, 0}; const char *file_uri_start = cp; *local_path = NULL; remainder->p = NULL; remainder->len = 0; { /* 1. Determine which root to use. */ const char *rewrites = opts->url_rewrites; struct mg_str *hh = mg_get_http_header(hm, "Host"); struct mg_str a, b; /* Check rewrites first. */ while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) { if (a.len > 1 && a.p[0] == '@') { /* Host rewrite. */ if (hh != NULL && hh->len == a.len - 1 && mg_ncasecmp(a.p + 1, hh->p, a.len - 1) == 0) { root = b; break; } } else { /* Regular rewrite, URI=directory */ int match_len = mg_match_prefix_n(a, hm->uri); if (match_len > 0) { file_uri_start = hm->uri.p + match_len; if (*file_uri_start == '/' || file_uri_start == cp_end) { /* Match ended at component boundary, ok. */ } else if (*(file_uri_start - 1) == '/') { /* Pattern ends with '/', backtrack. */ file_uri_start--; } else { /* No match: must fall on the component boundary. */ continue; } root = b; break; } } } /* If no rewrite rules matched, use DAV or regular document root. */ if (root.p == NULL) { #ifndef MG_DISABLE_DAV if (opts->dav_document_root != NULL && mg_is_dav_request(&hm->method)) { root.p = opts->dav_document_root; root.len = strlen(opts->dav_document_root); } else #endif { root.p = opts->document_root; root.len = strlen(opts->document_root); } } assert(root.p != NULL && root.len > 0); } { /* 2. Find where in the canonical URI path the local path ends. */ const char *u = file_uri_start + 1; char *lp = (char *) MG_MALLOC(root.len + hm->uri.len + 1); char *lp_end = lp + root.len + hm->uri.len + 1; char *p = lp, *ps; int exists = 1; if (lp == NULL) { ok = 0; goto out; } memcpy(p, root.p, root.len); p += root.len; if (*(p - 1) == DIRSEP) p--; *p = '\0'; ps = p; /* Chop off URI path components one by one and build local path. */ while (u <= cp_end) { const char *next = u; struct mg_str component; if (exists) { cs_stat_t st; exists = (mg_stat(lp, &st) == 0); if (exists && S_ISREG(st.st_mode)) { /* We found the terminal, the rest of the URI (if any) is path_info. */ if (*(u - 1) == '/') u--; break; } } if (u >= cp_end) break; parse_uri_component((const char **) &next, cp_end, '/', &component); if (component.len > 0) { int len; memmove(p + 1, component.p, component.len); len = mg_url_decode(p + 1, component.len, p + 1, lp_end - p - 1, 0); if (len <= 0) { ok = 0; break; } component.p = p + 1; component.len = len; if (mg_vcmp(&component, ".") == 0) { /* Yum. */ } else if (mg_vcmp(&component, "..") == 0) { while (p > ps && *p != DIRSEP) p--; *p = '\0'; } else { size_t i; #ifdef _WIN32 /* On Windows, make sure it's valid Unicode (no funny stuff). */ wchar_t buf[MG_MAX_PATH * 2]; if (to_wchar(component.p, buf, MG_MAX_PATH) == 0) { DBG(("[%.*s] smells funny", (int) component.len, component.p)); ok = 0; break; } #endif *p++ = DIRSEP; /* No NULs and DIRSEPs in the component (percent-encoded). */ for (i = 0; i < component.len; i++, p++) { if (*p == '\0' || *p == DIRSEP #ifdef _WIN32 /* On Windows, "/" is also accepted, so check for that too. */ || *p == '/' #endif ) { ok = 0; break; } } } } u = next; } if (ok) { *local_path = lp; if (u > cp_end) u = cp_end; remainder->p = u; remainder->len = cp_end - u; } else { MG_FREE(lp); } } out: DBG(("'%.*s' -> '%s' + '%.*s'", (int) hm->uri.len, hm->uri.p, *local_path ? *local_path : "", (int) remainder->len, remainder->p)); return ok; } #ifndef MG_DISABLE_CGI #ifdef _WIN32 struct mg_threadparam { sock_t s; HANDLE hPipe; }; static int mg_wait_until_ready(sock_t sock, int for_read) { fd_set set; FD_ZERO(&set); FD_SET(sock, &set); return select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0) == 1; } static void *mg_push_to_stdin(void *arg) { struct mg_threadparam *tp = (struct mg_threadparam *) arg; int n, sent, stop = 0; DWORD k; char buf[BUFSIZ]; while (!stop && mg_wait_until_ready(tp->s, 1) && (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) { if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue; for (sent = 0; !stop && sent < n; sent += k) { if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1; } } DBG(("%s", "FORWARED EVERYTHING TO CGI")); CloseHandle(tp->hPipe); MG_FREE(tp); _endthread(); return NULL; } static void *mg_pull_from_stdout(void *arg) { struct mg_threadparam *tp = (struct mg_threadparam *) arg; int k = 0, stop = 0; DWORD n, sent; char buf[BUFSIZ]; while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) { for (sent = 0; !stop && sent < n; sent += k) { if (mg_wait_until_ready(tp->s, 0) && (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1; } } DBG(("%s", "EOF FROM CGI")); CloseHandle(tp->hPipe); shutdown(tp->s, 2); // Without this, IO thread may get truncated data closesocket(tp->s); MG_FREE(tp); _endthread(); return NULL; } static void mg_spawn_stdio_thread(sock_t sock, HANDLE hPipe, void *(*func)(void *)) { struct mg_threadparam *tp = (struct mg_threadparam *) MG_MALLOC(sizeof(*tp)); if (tp != NULL) { tp->s = sock; tp->hPipe = hPipe; mg_start_thread(func, tp); } } static void mg_abs_path(const char *utf8_path, char *abs_path, size_t len) { wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE]; to_wchar(utf8_path, buf, ARRAY_SIZE(buf)); GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL); WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0); } static pid_t mg_start_process(const char *interp, const char *cmd, const char *env, const char *envp[], const char *dir, sock_t sock) { STARTUPINFOW si; PROCESS_INFORMATION pi; HANDLE a[2], b[2], me = GetCurrentProcess(); wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE]; char buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], cmdline[MAX_PATH_SIZE]; DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS; FILE *fp; memset(&si, 0, sizeof(si)); memset(&pi, 0, sizeof(pi)); si.cb = sizeof(si); si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; si.wShowWindow = SW_HIDE; si.hStdError = GetStdHandle(STD_ERROR_HANDLE); CreatePipe(&a[0], &a[1], NULL, 0); CreatePipe(&b[0], &b[1], NULL, 0); DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags); DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags); if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) { buf[0] = buf[1] = '\0'; fgets(buf, sizeof(buf), fp); buf[sizeof(buf) - 1] = '\0'; if (buf[0] == '#' && buf[1] == '!') { interp = buf + 2; /* Trim leading spaces: https://github.com/cesanta/mongoose/issues/489 */ while (*interp != '\0' && isspace(*(unsigned char *) interp)) { interp++; } } fclose(fp); } snprintf(buf, sizeof(buf), "%s/%s", dir, cmd); mg_abs_path(buf, buf2, ARRAY_SIZE(buf2)); mg_abs_path(dir, buf5, ARRAY_SIZE(buf5)); to_wchar(dir, full_dir, ARRAY_SIZE(full_dir)); if (interp != NULL) { mg_abs_path(interp, buf4, ARRAY_SIZE(buf4)); snprintf(cmdline, sizeof(cmdline), "%s \"%s\"", buf4, buf2); } else { snprintf(cmdline, sizeof(cmdline), "\"%s\"", buf2); } to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd)); if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP, (void *) env, full_dir, &si, &pi) != 0) { mg_spawn_stdio_thread(sock, a[1], mg_push_to_stdin); mg_spawn_stdio_thread(sock, b[0], mg_pull_from_stdout); } else { CloseHandle(a[1]); CloseHandle(b[0]); closesocket(sock); } DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess)); /* Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE */ CloseHandle(si.hStdOutput); CloseHandle(si.hStdInput); /* TODO(lsm): check if we need close process and thread handles too */ /* CloseHandle(pi.hThread); */ /* CloseHandle(pi.hProcess); */ (void) envp; return pi.hProcess; } #else static pid_t mg_start_process(const char *interp, const char *cmd, const char *env, const char *envp[], const char *dir, sock_t sock) { char buf[500]; pid_t pid = fork(); (void) env; if (pid == 0) { /* * In Linux `chdir` declared with `warn_unused_result` attribute * To shutup compiler we have yo use result in some way */ int tmp = chdir(dir); (void) tmp; (void) dup2(sock, 0); (void) dup2(sock, 1); closesocket(sock); /* * After exec, all signal handlers are restored to their default values, * with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's * implementation, SIGCHLD's handler will leave unchanged after exec * if it was set to be ignored. Restore it to default action. */ signal(SIGCHLD, SIG_DFL); if (interp == NULL) { execle(cmd, cmd, (char *) 0, envp); /* (char *) 0 to squash warning */ } else { execle(interp, interp, cmd, (char *) 0, envp); } snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n" "500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp, interp == NULL ? "" : " ", cmd, strerror(errno)); send(1, buf, strlen(buf), 0); exit(EXIT_FAILURE); /* exec call failed */ } return pid; } #endif /* _WIN32 */ /* * Append VARIABLE=VALUE\0 string to the buffer, and add a respective * pointer into the vars array. */ static char *mg_addenv(struct mg_cgi_env_block *block, const char *fmt, ...) { int n, space; char *added = block->buf + block->len; va_list ap; /* Calculate how much space is left in the buffer */ space = sizeof(block->buf) - (block->len + 2); if (space > 0) { /* Copy VARIABLE=VALUE\0 string into the free space */ va_start(ap, fmt); n = vsnprintf(added, (size_t) space, fmt, ap); va_end(ap); /* Make sure we do not overflow buffer and the envp array */ if (n > 0 && n + 1 < space && block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { /* Append a pointer to the added string into the envp array */ block->vars[block->nvars++] = added; /* Bump up used length counter. Include \0 terminator */ block->len += n + 1; } } return added; } static void mg_addenv2(struct mg_cgi_env_block *blk, const char *name) { const char *s; if ((s = getenv(name)) != NULL) mg_addenv(blk, "%s=%s", name, s); } static void mg_prepare_cgi_environment(struct mg_connection *nc, const char *prog, const struct mg_str *path_info, const struct http_message *hm, const struct mg_serve_http_opts *opts, struct mg_cgi_env_block *blk) { const char *s; struct mg_str *h; char *p; size_t i; char buf[100]; blk->len = blk->nvars = 0; blk->nc = nc; if ((s = getenv("SERVER_NAME")) != NULL) { mg_addenv(blk, "SERVER_NAME=%s", s); } else { mg_sock_to_str(nc->sock, buf, sizeof(buf), 3); mg_addenv(blk, "SERVER_NAME=%s", buf); } mg_addenv(blk, "SERVER_ROOT=%s", opts->document_root); mg_addenv(blk, "DOCUMENT_ROOT=%s", opts->document_root); mg_addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MG_VERSION); /* Prepare the environment block */ mg_addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); mg_addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); mg_addenv(blk, "%s", "REDIRECT_STATUS=200"); /* For PHP */ mg_addenv(blk, "REQUEST_METHOD=%.*s", (int) hm->method.len, hm->method.p); mg_addenv(blk, "REQUEST_URI=%.*s%s%.*s", (int) hm->uri.len, hm->uri.p, hm->query_string.len == 0 ? "" : "?", (int) hm->query_string.len, hm->query_string.p); mg_conn_addr_to_str(nc, buf, sizeof(buf), MG_SOCK_STRINGIFY_REMOTE | MG_SOCK_STRINGIFY_IP); mg_addenv(blk, "REMOTE_ADDR=%s", buf); mg_conn_addr_to_str(nc, buf, sizeof(buf), MG_SOCK_STRINGIFY_PORT); mg_addenv(blk, "SERVER_PORT=%s", buf); s = hm->uri.p + hm->uri.len - path_info->len - 1; if (*s == '/') { const char *base_name = strrchr(prog, DIRSEP); mg_addenv(blk, "SCRIPT_NAME=%.*s/%s", (int) (s - hm->uri.p), hm->uri.p, (base_name != NULL ? base_name + 1 : prog)); } else { mg_addenv(blk, "SCRIPT_NAME=%.*s", (int) (s - hm->uri.p + 1), hm->uri.p); } mg_addenv(blk, "SCRIPT_FILENAME=%s", prog); if (path_info != NULL && path_info->len > 0) { mg_addenv(blk, "PATH_INFO=%.*s", (int) path_info->len, path_info->p); /* Not really translated... */ mg_addenv(blk, "PATH_TRANSLATED=%.*s", (int) path_info->len, path_info->p); } #ifdef MG_ENABLE_SSL mg_addenv(blk, "HTTPS=%s", nc->ssl != NULL ? "on" : "off"); #else mg_addenv(blk, "HTTPS=off"); #endif if ((h = mg_get_http_header((struct http_message *) hm, "Content-Type")) != NULL) { mg_addenv(blk, "CONTENT_TYPE=%.*s", (int) h->len, h->p); } if (hm->query_string.len > 0) { mg_addenv(blk, "QUERY_STRING=%.*s", (int) hm->query_string.len, hm->query_string.p); } if ((h = mg_get_http_header((struct http_message *) hm, "Content-Length")) != NULL) { mg_addenv(blk, "CONTENT_LENGTH=%.*s", (int) h->len, h->p); } mg_addenv2(blk, "PATH"); mg_addenv2(blk, "TMP"); mg_addenv2(blk, "TEMP"); mg_addenv2(blk, "TMPDIR"); mg_addenv2(blk, "PERLLIB"); mg_addenv2(blk, MG_ENV_EXPORT_TO_CGI); #if defined(_WIN32) mg_addenv2(blk, "COMSPEC"); mg_addenv2(blk, "SYSTEMROOT"); mg_addenv2(blk, "SystemDrive"); mg_addenv2(blk, "ProgramFiles"); mg_addenv2(blk, "ProgramFiles(x86)"); mg_addenv2(blk, "CommonProgramFiles(x86)"); #else mg_addenv2(blk, "LD_LIBRARY_PATH"); #endif /* _WIN32 */ /* Add all headers as HTTP_* variables */ for (i = 0; hm->header_names[i].len > 0; i++) { p = mg_addenv(blk, "HTTP_%.*s=%.*s", (int) hm->header_names[i].len, hm->header_names[i].p, (int) hm->header_values[i].len, hm->header_values[i].p); /* Convert variable name into uppercase, and change - to _ */ for (; *p != '=' && *p != '\0'; p++) { if (*p == '-') *p = '_'; *p = (char) toupper(*(unsigned char *) p); } } blk->vars[blk->nvars++] = NULL; blk->buf[blk->len++] = '\0'; } static void mg_cgi_ev_handler(struct mg_connection *cgi_nc, int ev, void *ev_data) { struct mg_connection *nc = (struct mg_connection *) cgi_nc->user_data; (void) ev_data; if (nc == NULL) return; switch (ev) { case MG_EV_RECV: /* * CGI script does not output reply line, like "HTTP/1.1 CODE XXXXX\n" * It outputs headers, then body. Headers might include "Status" * header, which changes CODE, and it might include "Location" header * which changes CODE to 302. * * Therefore we do not send the output from the CGI script to the user * until all CGI headers are received. * * Here we parse the output from the CGI script, and if all headers has * been received, send appropriate reply line, and forward all * received headers to the client. */ if (nc->flags & MG_F_USER_1) { struct mbuf *io = &cgi_nc->recv_mbuf; int len = mg_http_get_request_len(io->buf, io->len); if (len == 0) break; if (len < 0 || io->len > MG_MAX_HTTP_REQUEST_SIZE) { cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; mg_http_send_error(nc, 500, "Bad headers"); } else { struct http_message hm; struct mg_str *h; mg_http_parse_headers(io->buf, io->buf + io->len, io->len, &hm); if (mg_get_http_header(&hm, "Location") != NULL) { mg_printf(nc, "%s", "HTTP/1.1 302 Moved\r\n"); } else if ((h = mg_get_http_header(&hm, "Status")) != NULL) { mg_printf(nc, "HTTP/1.1 %.*s\r\n", (int) h->len, h->p); } else { mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\n"); } } nc->flags &= ~MG_F_USER_1; } if (!(nc->flags & MG_F_USER_1)) { mg_forward(cgi_nc, nc); } break; case MG_EV_CLOSE: mg_http_free_proto_data_cgi(&mg_http_get_proto_data(cgi_nc)->cgi); nc->flags |= MG_F_SEND_AND_CLOSE; break; } } static void mg_handle_cgi(struct mg_connection *nc, const char *prog, const struct mg_str *path_info, const struct http_message *hm, const struct mg_serve_http_opts *opts) { struct mg_cgi_env_block blk; char dir[MAX_PATH_SIZE]; const char *p; sock_t fds[2]; DBG(("%p [%s]", nc, prog)); mg_prepare_cgi_environment(nc, prog, path_info, hm, opts, &blk); /* * CGI must be executed in its own directory. 'dir' must point to the * directory containing executable program, 'p' must point to the * executable program name relative to 'dir'. */ if ((p = strrchr(prog, DIRSEP)) == NULL) { snprintf(dir, sizeof(dir), "%s", "."); } else { snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog); prog = p + 1; } /* * Try to create socketpair in a loop until success. mg_socketpair() * can be interrupted by a signal and fail. * TODO(lsm): use sigaction to restart interrupted syscall */ do { mg_socketpair(fds, SOCK_STREAM); } while (fds[0] == INVALID_SOCKET); if (mg_start_process(opts->cgi_interpreter, prog, blk.buf, blk.vars, dir, fds[1]) != 0) { size_t n = nc->recv_mbuf.len - (hm->message.len - hm->body.len); struct mg_connection *cgi_nc = mg_add_sock(nc->mgr, fds[0], mg_cgi_ev_handler); struct mg_http_proto_data *cgi_pd = mg_http_get_proto_data(cgi_nc); cgi_pd->cgi.cgi_nc = cgi_nc; cgi_pd->cgi.cgi_nc->user_data = nc; nc->flags |= MG_F_USER_1; /* Push POST data to the CGI */ if (n > 0 && n < nc->recv_mbuf.len) { mg_send(cgi_pd->cgi.cgi_nc, hm->body.p, n); } mbuf_remove(&nc->recv_mbuf, nc->recv_mbuf.len); } else { closesocket(fds[0]); mg_http_send_error(nc, 500, "CGI failure"); } #ifndef _WIN32 closesocket(fds[1]); /* On Windows, CGI stdio thread closes that socket */ #endif } #endif static int mg_get_month_index(const char *s) { static const char *month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; size_t i; for (i = 0; i < ARRAY_SIZE(month_names); i++) if (!strcmp(s, month_names[i])) return (int) i; return -1; } static int mg_num_leap_years(int year) { return year / 4 - year / 100 + year / 400; } /* Parse UTC date-time string, and return the corresponding time_t value. */ MG_INTERNAL time_t mg_parse_date_string(const char *datetime) { static const unsigned short days_before_month[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; char month_str[32]; int second, minute, hour, day, month, year, leap_days, days; time_t result = (time_t) 0; if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", &day, month_str, &year, &hour, &minute, &second) == 6) || (sscanf(datetime, "%d %3s %d %d:%d:%d", &day, month_str, &year, &hour, &minute, &second) == 6) || (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", &day, month_str, &year, &hour, &minute, &second) == 6) || (sscanf(datetime, "%d-%3s-%d %d:%d:%d", &day, month_str, &year, &hour, &minute, &second) == 6)) && year > 1970 && (month = mg_get_month_index(month_str)) != -1) { leap_days = mg_num_leap_years(year) - mg_num_leap_years(1970); year -= 1970; days = year * 365 + days_before_month[month] + (day - 1) + leap_days; result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; } return result; } MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st) { struct mg_str *hdr; if ((hdr = mg_get_http_header(hm, "If-None-Match")) != NULL) { char etag[64]; mg_http_construct_etag(etag, sizeof(etag), st); return mg_vcasecmp(hdr, etag) == 0; } else if ((hdr = mg_get_http_header(hm, "If-Modified-Since")) != NULL) { return st->st_mtime <= mg_parse_date_string(hdr->p); } else { return 0; } } static void mg_http_send_digest_auth_request(struct mg_connection *c, const char *domain) { mg_printf(c, "HTTP/1.1 401 Unauthorized\r\n" "WWW-Authenticate: Digest qop=\"auth\", " "realm=\"%s\", nonce=\"%lu\"\r\n" "Content-Length: 0\r\n\r\n", domain, (unsigned long) time(NULL)); } static void mg_http_send_options(struct mg_connection *nc) { mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, CONNECT, OPTIONS" #ifndef MG_DISABLE_DAV ", MKCOL, PUT, DELETE, PROPFIND, MOVE\r\nDAV: 1,2" #endif "\r\n\r\n"); nc->flags |= MG_F_SEND_AND_CLOSE; } static int mg_is_creation_request(const struct http_message *hm) { return mg_vcmp(&hm->method, "MKCOL") == 0 || mg_vcmp(&hm->method, "PUT") == 0; } MG_INTERNAL void mg_send_http_file(struct mg_connection *nc, char *path, const struct mg_str *path_info, struct http_message *hm, struct mg_serve_http_opts *opts) { int exists, is_directory, is_dav = mg_is_dav_request(&hm->method); int is_cgi; char *index_file = NULL; cs_stat_t st; exists = (mg_stat(path, &st) == 0); is_directory = exists && S_ISDIR(st.st_mode); if (is_directory) mg_find_index_file(path, opts->index_files, &index_file, &st); is_cgi = (mg_match_prefix(opts->cgi_file_pattern, strlen(opts->cgi_file_pattern), index_file ? index_file : path) > 0); DBG(("%p %.*s [%s] exists=%d is_dir=%d is_dav=%d is_cgi=%d index=%s", nc, (int) hm->method.len, hm->method.p, path, exists, is_directory, is_dav, is_cgi, index_file ? index_file : "")); if (is_directory && hm->uri.p[hm->uri.len - 1] != '/' && !is_dav) { mg_printf(nc, "HTTP/1.1 301 Moved\r\nLocation: %.*s/\r\n" "Content-Length: 0\r\n\r\n", (int) hm->uri.len, hm->uri.p); MG_FREE(index_file); return; } /* If we have path_info, the only way to handle it is CGI. */ if (path_info->len > 0 && !is_cgi) { mg_http_send_error(nc, 501, NULL); MG_FREE(index_file); return; } if (is_dav && opts->dav_document_root == NULL) { mg_http_send_error(nc, 501, NULL); } else if (!mg_is_authorized(hm, path, is_directory, opts->auth_domain, opts->global_auth_file, 1) || !mg_is_authorized(hm, path, is_directory, opts->auth_domain, opts->per_directory_auth_file, 0)) { mg_http_send_digest_auth_request(nc, opts->auth_domain); } else if (is_cgi) { #if !defined(MG_DISABLE_CGI) mg_handle_cgi(nc, index_file ? index_file : path, path_info, hm, opts); #else mg_http_send_error(nc, 501, NULL); #endif /* MG_DISABLE_CGI */ } else if ((!exists || mg_is_file_hidden(path, opts, 0 /* specials are ok */)) && !mg_is_creation_request(hm)) { mg_http_send_error(nc, 404, NULL); #ifndef MG_DISABLE_DAV } else if (!mg_vcmp(&hm->method, "PROPFIND")) { mg_handle_propfind(nc, path, &st, hm, opts); #ifndef MG_DISABLE_DAV_AUTH } else if (is_dav && (opts->dav_auth_file == NULL || (strcmp(opts->dav_auth_file, "-") != 0 && !mg_is_authorized(hm, path, is_directory, opts->auth_domain, opts->dav_auth_file, 1)))) { mg_http_send_digest_auth_request(nc, opts->auth_domain); #endif } else if (!mg_vcmp(&hm->method, "MKCOL")) { mg_handle_mkcol(nc, path, hm); } else if (!mg_vcmp(&hm->method, "DELETE")) { mg_handle_delete(nc, opts, path); } else if (!mg_vcmp(&hm->method, "PUT")) { mg_handle_put(nc, path, hm); } else if (!mg_vcmp(&hm->method, "MOVE")) { mg_handle_move(nc, opts, path, hm); #ifdef MG_ENABLE_FAKE_DAVLOCK } else if (!mg_vcmp(&hm->method, "LOCK")) { mg_handle_lock(nc, path); #endif #endif } else if (!mg_vcmp(&hm->method, "OPTIONS")) { mg_http_send_options(nc); } else if (is_directory && index_file == NULL) { #ifndef MG_DISABLE_DIRECTORY_LISTING if (strcmp(opts->enable_directory_listing, "yes") == 0) { mg_send_directory_listing(nc, path, hm, opts); } else { mg_http_send_error(nc, 403, NULL); } #else mg_http_send_error(nc, 501, NULL); #endif } else if (mg_is_not_modified(hm, &st)) { mg_http_send_error(nc, 304, "Not Modified"); } else { mg_http_serve_file2(nc, index_file ? index_file : path, hm, opts); } MG_FREE(index_file); } void mg_serve_http(struct mg_connection *nc, struct http_message *hm, struct mg_serve_http_opts opts) { char *path = NULL; struct mg_str *hdr, path_info; uint32_t remote_ip = ntohl(*(uint32_t *) &nc->sa.sin.sin_addr); if (mg_check_ip_acl(opts.ip_acl, remote_ip) != 1) { /* Not allowed to connect */ mg_http_send_error(nc, 403, NULL); nc->flags |= MG_F_SEND_AND_CLOSE; return; } if (mg_http_send_port_based_redirect(nc, hm, &opts)) { return; } if (opts.document_root == NULL) { opts.document_root = "."; } if (opts.per_directory_auth_file == NULL) { opts.per_directory_auth_file = ".htpasswd"; } if (opts.enable_directory_listing == NULL) { opts.enable_directory_listing = "yes"; } if (opts.cgi_file_pattern == NULL) { opts.cgi_file_pattern = "**.cgi$|**.php$"; } if (opts.ssi_pattern == NULL) { opts.ssi_pattern = "**.shtml$|**.shtm$"; } if (opts.index_files == NULL) { opts.index_files = "index.html,index.htm,index.shtml,index.cgi,index.php"; } /* Normalize path - resolve "." and ".." (in-place). */ if (!mg_normalize_uri_path(&hm->uri, &hm->uri)) { mg_http_send_error(nc, 400, NULL); return; } if (mg_uri_to_local_path(hm, &opts, &path, &path_info) == 0) { mg_http_send_error(nc, 404, NULL); return; } mg_send_http_file(nc, path, &path_info, hm, &opts); MG_FREE(path); path = NULL; /* Close connection for non-keep-alive requests */ if (mg_vcmp(&hm->proto, "HTTP/1.1") != 0 || ((hdr = mg_get_http_header(hm, "Connection")) != NULL && mg_vcmp(hdr, "keep-alive") != 0)) { #if 0 nc->flags |= MG_F_SEND_AND_CLOSE; #endif } } #endif /* MG_DISABLE_FILESYSTEM */ /* returns 0 on success, -1 on error */ static int mg_http_common_url_parse(const char *url, const char *schema, const char *schema_tls, int *use_ssl, char **addr, int *port_i, const char **path) { int addr_len = 0; if (memcmp(url, schema, strlen(schema)) == 0) { url += strlen(schema); } else if (memcmp(url, schema_tls, strlen(schema_tls)) == 0) { url += strlen(schema_tls); *use_ssl = 1; #ifndef MG_ENABLE_SSL return -1; /* SSL is not enabled, cannot do HTTPS URLs */ #endif } while (*url != '\0') { *addr = (char *) MG_REALLOC(*addr, addr_len + 6 /* space for port too. */); if (*addr == NULL) { DBG(("OOM")); return -1; } if (*url == '/') { break; } if (*url == ':') *port_i = addr_len; (*addr)[addr_len++] = *url; (*addr)[addr_len] = '\0'; url++; } if (addr_len == 0) goto cleanup; if (*port_i < 0) { *port_i = addr_len; strcpy(*addr + *port_i, *use_ssl ? ":443" : ":80"); } else { *port_i = -1; } if (*path == NULL) *path = url; if (**path == '\0') *path = "/"; DBG(("%s %s", *addr, *path)); return 0; cleanup: MG_FREE(*addr); return -1; } struct mg_connection *mg_connect_http_base( struct mg_mgr *mgr, mg_event_handler_t ev_handler, struct mg_connect_opts opts, const char *schema, const char *schema_ssl, const char *url, const char **path, char **addr) { struct mg_connection *nc = NULL; int port_i = -1; int use_ssl = 0; if (mg_http_common_url_parse(url, schema, schema_ssl, &use_ssl, addr, &port_i, path) < 0) { return NULL; } LOG(LL_DEBUG, ("%s use_ssl? %d", url, use_ssl)); if (use_ssl) { #ifdef MG_ENABLE_SSL /* * Schema requires SSL, but no SSL parameters were provided in opts. * In order to maintain backward compatibility, use a faux-SSL with no * verification. */ if (opts.ssl_ca_cert == NULL) { opts.ssl_ca_cert = "*"; } #else MG_SET_PTRPTR(opts.error_string, "ssl is disabled"); MG_FREE(addr); return NULL; #endif } if ((nc = mg_connect_opt(mgr, *addr, ev_handler, opts)) != NULL) { mg_set_protocol_http_websocket(nc); /* If the port was addred by us, restore the original host. */ if (port_i >= 0) (*addr)[port_i] = '\0'; } return nc; } struct mg_connection *mg_connect_http_opt(struct mg_mgr *mgr, mg_event_handler_t ev_handler, struct mg_connect_opts opts, const char *url, const char *extra_headers, const char *post_data) { char *addr = NULL; const char *path = NULL; struct mg_connection *nc = mg_connect_http_base( mgr, ev_handler, opts, "http://", "https://", url, &path, &addr); if (nc == NULL) { return NULL; } mg_printf(nc, "%s %s HTTP/1.1\r\nHost: %s\r\nContent-Length: %" SIZE_T_FMT "\r\n%s\r\n%s", post_data == NULL ? "GET" : "POST", path, addr, post_data == NULL ? 0 : strlen(post_data), extra_headers == NULL ? "" : extra_headers, post_data == NULL ? "" : post_data); MG_FREE(addr); return nc; } struct mg_connection *mg_connect_http(struct mg_mgr *mgr, mg_event_handler_t ev_handler, const char *url, const char *extra_headers, const char *post_data) { struct mg_connect_opts opts; memset(&opts, 0, sizeof(opts)); return mg_connect_http_opt(mgr, ev_handler, opts, url, extra_headers, post_data); } #ifndef MG_DISABLE_HTTP_WEBSOCKET struct mg_connection *mg_connect_ws_opt(struct mg_mgr *mgr, mg_event_handler_t ev_handler, struct mg_connect_opts opts, const char *url, const char *protocol, const char *extra_headers) { char *addr = NULL; const char *path = NULL; struct mg_connection *nc = mg_connect_http_base( mgr, ev_handler, opts, "ws://", "wss://", url, &path, &addr); if (nc != NULL) { mg_send_websocket_handshake2(nc, path, addr, protocol, extra_headers); } MG_FREE(addr); return nc; } struct mg_connection *mg_connect_ws(struct mg_mgr *mgr, mg_event_handler_t ev_handler, const char *url, const char *protocol, const char *extra_headers) { struct mg_connect_opts opts; memset(&opts, 0, sizeof(opts)); return mg_connect_ws_opt(mgr, ev_handler, opts, url, protocol, extra_headers); } #endif /* MG_DISABLE_HTTP_WEBSOCKET */ size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name, size_t var_name_len, char *file_name, size_t file_name_len, const char **data, size_t *data_len) { static const char cd[] = "Content-Disposition: "; size_t hl, bl, n, ll, pos, cdl = sizeof(cd) - 1; if (buf == NULL || buf_len <= 0) return 0; if ((hl = mg_http_get_request_len(buf, buf_len)) <= 0) return 0; if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0; /* Get boundary length */ bl = mg_get_line_len(buf, buf_len); /* Loop through headers, fetch variable name and file name */ var_name[0] = file_name[0] = '\0'; for (n = bl; (ll = mg_get_line_len(buf + n, hl - n)) > 0; n += ll) { if (mg_ncasecmp(cd, buf + n, cdl) == 0) { struct mg_str header; header.p = buf + n + cdl; header.len = ll - (cdl + 2); mg_http_parse_header(&header, "name", var_name, var_name_len); mg_http_parse_header(&header, "filename", file_name, file_name_len); } } /* Scan through the body, search for terminating boundary */ for (pos = hl; pos + (bl - 2) < buf_len; pos++) { if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) { if (data_len != NULL) *data_len = (pos - 2) - hl; if (data != NULL) *data = buf + hl; return pos; } } return 0; } void mg_register_http_endpoint(struct mg_connection *nc, const char *uri_path, mg_event_handler_t handler) { struct mg_http_proto_data *pd = NULL; struct mg_http_endpoint *new_ep = NULL; if (nc == NULL) return; new_ep = (struct mg_http_endpoint *) calloc(1, sizeof(*new_ep)); if (new_ep == NULL) return; pd = mg_http_get_proto_data(nc); new_ep->name = strdup(uri_path); new_ep->name_len = strlen(new_ep->name); new_ep->handler = handler; new_ep->next = pd->endpoints; pd->endpoints = new_ep; } #endif /* MG_DISABLE_HTTP */ #ifdef MG_MODULE_LINES #line 1 "./src/util.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "common/base64.h" */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ const char *mg_skip(const char *s, const char *end, const char *delims, struct mg_str *v) { v->p = s; while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++; v->len = s - v->p; while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++; return s; } static int lowercase(const char *s) { return tolower(*(const unsigned char *) s); } int mg_ncasecmp(const char *s1, const char *s2, size_t len) { int diff = 0; if (len > 0) do { diff = lowercase(s1++) - lowercase(s2++); } while (diff == 0 && s1[-1] != '\0' && --len > 0); return diff; } int mg_casecmp(const char *s1, const char *s2) { return mg_ncasecmp(s1, s2, (size_t) ~0); } #ifndef MG_DISABLE_FILESYSTEM int mg_stat(const char *path, cs_stat_t *st) { #ifdef _WIN32 wchar_t wpath[MAX_PATH_SIZE]; to_wchar(path, wpath, ARRAY_SIZE(wpath)); DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st))); return _wstati64(wpath, (struct _stati64 *) st); #else return stat(path, st); #endif } FILE *mg_fopen(const char *path, const char *mode) { #ifdef _WIN32 wchar_t wpath[MAX_PATH_SIZE], wmode[10]; to_wchar(path, wpath, ARRAY_SIZE(wpath)); to_wchar(mode, wmode, ARRAY_SIZE(wmode)); return _wfopen(wpath, wmode); #else return fopen(path, mode); #endif } int mg_open(const char *path, int flag, int mode) { /* LCOV_EXCL_LINE */ #ifdef _WIN32 wchar_t wpath[MAX_PATH_SIZE]; to_wchar(path, wpath, ARRAY_SIZE(wpath)); return _wopen(wpath, flag, mode); #else return open(path, flag, mode); /* LCOV_EXCL_LINE */ #endif } #endif void mg_base64_encode(const unsigned char *src, int src_len, char *dst) { cs_base64_encode(src, src_len, dst); } int mg_base64_decode(const unsigned char *s, int len, char *dst) { return cs_base64_decode(s, len, dst); } #ifdef MG_ENABLE_THREADS void *mg_start_thread(void *(*f)(void *), void *p) { #ifdef _WIN32 return (void *) _beginthread((void(__cdecl *) (void *) ) f, 0, p); #else pthread_t thread_id = (pthread_t) 0; pthread_attr_t attr; (void) pthread_attr_init(&attr); (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); #if defined(MG_STACK_SIZE) && MG_STACK_SIZE > 1 (void) pthread_attr_setstacksize(&attr, MG_STACK_SIZE); #endif pthread_create(&thread_id, &attr, f, p); pthread_attr_destroy(&attr); return (void *) thread_id; #endif } #endif /* MG_ENABLE_THREADS */ /* Set close-on-exec bit for a given socket. */ void mg_set_close_on_exec(sock_t sock) { #ifdef _WIN32 (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); #elif defined(__unix__) fcntl(sock, F_SETFD, FD_CLOEXEC); #else (void) sock; #endif } void mg_sock_addr_to_str(const union socket_address *sa, char *buf, size_t len, int flags) { int is_v6; if (buf == NULL || len <= 0) return; buf[0] = '\0'; #if defined(MG_ENABLE_IPV6) is_v6 = sa->sa.sa_family == AF_INET6; #else is_v6 = 0; #endif if (flags & MG_SOCK_STRINGIFY_IP) { #if defined(MG_ENABLE_IPV6) const void *addr = NULL; char *start = buf; socklen_t capacity = len; if (!is_v6) { addr = &sa->sin.sin_addr; } else { addr = (void *) &sa->sin6.sin6_addr; if (flags & MG_SOCK_STRINGIFY_PORT) { *buf = '['; start++; capacity--; } } if (inet_ntop(sa->sa.sa_family, addr, start, capacity) == NULL) { *buf = '\0'; } #elif defined(_WIN32) || defined(MG_LWIP) /* Only Windoze Vista (and newer) have inet_ntop() */ strncpy(buf, inet_ntoa(sa->sin.sin_addr), len); #else inet_ntop(AF_INET, (void *) &sa->sin.sin_addr, buf, len); #endif } if (flags & MG_SOCK_STRINGIFY_PORT) { int port = ntohs(sa->sin.sin_port); if (flags & MG_SOCK_STRINGIFY_IP) { snprintf(buf + strlen(buf), len - (strlen(buf) + 1), "%s:%d", (is_v6 ? "]" : ""), port); } else { snprintf(buf, len, "%d", port); } } } void mg_conn_addr_to_str(struct mg_connection *nc, char *buf, size_t len, int flags) { union socket_address sa; memset(&sa, 0, sizeof(sa)); mg_if_get_conn_addr(nc, flags & MG_SOCK_STRINGIFY_REMOTE, &sa); mg_sock_addr_to_str(&sa, buf, len, flags); } #ifndef MG_DISABLE_HEXDUMP int mg_hexdump(const void *buf, int len, char *dst, int dst_len) { const unsigned char *p = (const unsigned char *) buf; char ascii[17] = ""; int i, idx, n = 0; for (i = 0; i < len; i++) { idx = i % 16; if (idx == 0) { if (i > 0) n += snprintf(dst + n, dst_len - n, " %s\n", ascii); n += snprintf(dst + n, dst_len - n, "%04x ", i); } n += snprintf(dst + n, dst_len - n, " %02x", p[i]); ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; ascii[idx + 1] = '\0'; } while (i++ % 16) n += snprintf(dst + n, dst_len - n, "%s", " "); n += snprintf(dst + n, dst_len - n, " %s\n\n", ascii); return n; } #endif int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap) { va_list ap_copy; int len; va_copy(ap_copy, ap); len = vsnprintf(*buf, size, fmt, ap_copy); va_end(ap_copy); if (len < 0) { /* eCos and Windows are not standard-compliant and return -1 when * the buffer is too small. Keep allocating larger buffers until we * succeed or out of memory. */ *buf = NULL; /* LCOV_EXCL_START */ while (len < 0) { MG_FREE(*buf); size *= 2; if ((*buf = (char *) MG_MALLOC(size)) == NULL) break; va_copy(ap_copy, ap); len = vsnprintf(*buf, size, fmt, ap_copy); va_end(ap_copy); } /* LCOV_EXCL_STOP */ } else if (len >= (int) size) { /* Standard-compliant code path. Allocate a buffer that is large enough. */ if ((*buf = (char *) MG_MALLOC(len + 1)) == NULL) { len = -1; /* LCOV_EXCL_LINE */ } else { /* LCOV_EXCL_LINE */ va_copy(ap_copy, ap); len = vsnprintf(*buf, len + 1, fmt, ap_copy); va_end(ap_copy); } } return len; } #if !defined(MG_DISABLE_HEXDUMP) void mg_hexdump_connection(struct mg_connection *nc, const char *path, const void *buf, int num_bytes, int ev) { #if !defined(NO_LIBC) && !defined(MG_DISABLE_STDIO) FILE *fp = NULL; char *hexbuf, src[60], dst[60]; int buf_size = num_bytes * 5 + 100; if (strcmp(path, "-") == 0) { fp = stdout; } else if (strcmp(path, "--") == 0) { fp = stderr; #ifndef MG_DISABLE_FILESYSTEM } else { fp = fopen(path, "a"); #endif } if (fp == NULL) return; mg_conn_addr_to_str(nc, src, sizeof(src), MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT); mg_conn_addr_to_str(nc, dst, sizeof(dst), MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT | MG_SOCK_STRINGIFY_REMOTE); fprintf( fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL), (void *) nc, src, ev == MG_EV_RECV ? "<-" : ev == MG_EV_SEND ? "->" : ev == MG_EV_ACCEPT ? "" : "XX", dst, num_bytes); if (num_bytes > 0 && (hexbuf = (char *) MG_MALLOC(buf_size)) != NULL) { mg_hexdump(buf, num_bytes, hexbuf, buf_size); fprintf(fp, "%s", hexbuf); MG_FREE(hexbuf); } if (fp != stdin && fp != stdout) fclose(fp); #endif } #endif int mg_is_big_endian(void) { static const int n = 1; /* TODO(mkm) use compiletime check with 4-byte char literal */ return ((char *) &n)[0] == 0; } const char *mg_next_comma_list_entry(const char *list, struct mg_str *val, struct mg_str *eq_val) { if (list == NULL || *list == '\0') { /* End of the list */ list = NULL; } else { val->p = list; if ((list = strchr(val->p, ',')) != NULL) { /* Comma found. Store length and shift the list ptr */ val->len = list - val->p; list++; } else { /* This value is the last one */ list = val->p + strlen(val->p); val->len = list - val->p; } if (eq_val != NULL) { /* Value has form "x=y", adjust pointers and lengths */ /* so that val points to "x", and eq_val points to "y". */ eq_val->len = 0; eq_val->p = (const char *) memchr(val->p, '=', val->len); if (eq_val->p != NULL) { eq_val->p++; /* Skip over '=' character */ eq_val->len = val->p + val->len - eq_val->p; val->len = (eq_val->p - val->p) - 1; } } } return list; } int mg_match_prefix_n(const struct mg_str pattern, const struct mg_str str) { const char *or_str; size_t len, i = 0, j = 0; int res; if ((or_str = (const char *) memchr(pattern.p, '|', pattern.len)) != NULL) { struct mg_str pstr = {pattern.p, (size_t)(or_str - pattern.p)}; res = mg_match_prefix_n(pstr, str); if (res > 0) return res; pstr.p = or_str + 1; pstr.len = (pattern.p + pattern.len) - (or_str + 1); return mg_match_prefix_n(pstr, str); } for (; i < pattern.len; i++, j++) { if (pattern.p[i] == '?' && j != str.len) { continue; } else if (pattern.p[i] == '$') { return j == str.len ? (int) j : -1; } else if (pattern.p[i] == '*') { i++; if (pattern.p[i] == '*') { i++; len = str.len - j; } else { len = 0; while (j + len != str.len && str.p[len] != '/') { len++; } } if (i == pattern.len) { return j + len; } do { const struct mg_str pstr = {pattern.p + i, pattern.len - i}; const struct mg_str sstr = {str.p + j + len, str.len - j - len}; res = mg_match_prefix_n(pstr, sstr); } while (res == -1 && len-- > 0); return res == -1 ? -1 : (int) (j + res + len); } else if (lowercase(&pattern.p[i]) != lowercase(&str.p[j])) { return -1; } } return j; } int mg_match_prefix(const char *pattern, int pattern_len, const char *str) { const struct mg_str pstr = {pattern, (size_t) pattern_len}; return mg_match_prefix_n(pstr, mg_mk_str(str)); } #ifdef MG_MODULE_LINES #line 1 "./src/mqtt.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef MG_DISABLE_MQTT #include /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/mqtt.h" */ MG_INTERNAL int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm) { uint8_t header; int cmd; size_t len = 0; int var_len = 0; char *vlen = &io->buf[1]; if (io->len < 2) return -1; header = io->buf[0]; cmd = header >> 4; /* decode mqtt variable length */ do { len += (*vlen & 127) << 7 * (vlen - &io->buf[1]); } while ((*vlen++ & 128) != 0 && ((size_t)(vlen - io->buf) <= io->len)); if (len != 0 && io->len < (size_t)(len - 1)) return -1; mbuf_remove(io, 1 + (vlen - &io->buf[1])); mm->cmd = cmd; mm->qos = MG_MQTT_GET_QOS(header); switch (cmd) { case MG_MQTT_CMD_CONNECT: /* TODO(mkm): parse keepalive and will */ break; case MG_MQTT_CMD_CONNACK: mm->connack_ret_code = io->buf[1]; var_len = 2; break; case MG_MQTT_CMD_PUBACK: case MG_MQTT_CMD_PUBREC: case MG_MQTT_CMD_PUBREL: case MG_MQTT_CMD_PUBCOMP: case MG_MQTT_CMD_SUBACK: mm->message_id = ntohs(*(uint16_t *) io->buf); var_len = 2; break; case MG_MQTT_CMD_PUBLISH: { uint16_t topic_len = ntohs(*(uint16_t *) io->buf); mm->topic = (char *) MG_MALLOC(topic_len + 1); mm->topic[topic_len] = 0; strncpy(mm->topic, io->buf + 2, topic_len); var_len = topic_len + 2; if (MG_MQTT_GET_QOS(header) > 0) { mm->message_id = ntohs(*(uint16_t *) io->buf); var_len += 2; } } break; case MG_MQTT_CMD_SUBSCRIBE: /* * topic expressions are left in the payload and can be parsed with * `mg_mqtt_next_subscribe_topic` */ mm->message_id = ntohs(*(uint16_t *) io->buf); var_len = 2; break; default: /* Unhandled command */ break; } mbuf_remove(io, var_len); return len - var_len; } static void mqtt_handler(struct mg_connection *nc, int ev, void *ev_data) { int len; struct mbuf *io = &nc->recv_mbuf; struct mg_mqtt_message mm; memset(&mm, 0, sizeof(mm)); nc->handler(nc, ev, ev_data); switch (ev) { case MG_EV_RECV: len = parse_mqtt(io, &mm); if (len == -1) break; /* not fully buffered */ mm.payload.p = io->buf; mm.payload.len = len; nc->handler(nc, MG_MQTT_EVENT_BASE + mm.cmd, &mm); if (mm.topic) { MG_FREE(mm.topic); } mbuf_remove(io, mm.payload.len); break; } } void mg_set_protocol_mqtt(struct mg_connection *nc) { nc->proto_handler = mqtt_handler; } void mg_send_mqtt_handshake(struct mg_connection *nc, const char *client_id) { static struct mg_send_mqtt_handshake_opts opts; mg_send_mqtt_handshake_opt(nc, client_id, opts); } void mg_send_mqtt_handshake_opt(struct mg_connection *nc, const char *client_id, struct mg_send_mqtt_handshake_opts opts) { uint8_t header = MG_MQTT_CMD_CONNECT << 4; uint8_t rem_len; uint16_t keep_alive; uint16_t len; /* * 9: version_header(len, magic_string, version_number), 1: flags, 2: * keep-alive timer, * 2: client_identifier_len, n: client_id */ rem_len = 9 + 1 + 2 + 2 + (uint8_t) strlen(client_id); if (opts.user_name != NULL) { opts.flags |= MG_MQTT_HAS_USER_NAME; rem_len += (uint8_t) strlen(opts.user_name) + 2; } if (opts.password != NULL) { opts.flags |= MG_MQTT_HAS_PASSWORD; rem_len += (uint8_t) strlen(opts.password) + 2; } mg_send(nc, &header, 1); mg_send(nc, &rem_len, 1); mg_send(nc, "\00\06MQIsdp\03", 9); mg_send(nc, &opts.flags, 1); if (opts.keep_alive == 0) { opts.keep_alive = 60; } keep_alive = htons(opts.keep_alive); mg_send(nc, &keep_alive, 2); len = htons((uint16_t) strlen(client_id)); mg_send(nc, &len, 2); mg_send(nc, client_id, strlen(client_id)); if (opts.flags & MG_MQTT_HAS_USER_NAME) { len = htons((uint16_t) strlen(opts.user_name)); mg_send(nc, &len, 2); mg_send(nc, opts.user_name, strlen(opts.user_name)); } if (opts.flags & MG_MQTT_HAS_PASSWORD) { len = htons((uint16_t) strlen(opts.password)); mg_send(nc, &len, 2); mg_send(nc, opts.password, strlen(opts.password)); } } static void mg_mqtt_prepend_header(struct mg_connection *nc, uint8_t cmd, uint8_t flags, size_t len) { size_t off = nc->send_mbuf.len - len; uint8_t header = cmd << 4 | (uint8_t) flags; uint8_t buf[1 + sizeof(size_t)]; uint8_t *vlen = &buf[1]; assert(nc->send_mbuf.len >= len); buf[0] = header; /* mqtt variable length encoding */ do { *vlen = len % 0x80; len /= 0x80; if (len > 0) *vlen |= 0x80; vlen++; } while (len > 0); mbuf_insert(&nc->send_mbuf, off, buf, vlen - buf); } void mg_mqtt_publish(struct mg_connection *nc, const char *topic, uint16_t message_id, int flags, const void *data, size_t len) { size_t old_len = nc->send_mbuf.len; uint16_t topic_len = htons((uint16_t) strlen(topic)); uint16_t message_id_net = htons(message_id); mg_send(nc, &topic_len, 2); mg_send(nc, topic, strlen(topic)); if (MG_MQTT_GET_QOS(flags) > 0) { mg_send(nc, &message_id_net, 2); } mg_send(nc, data, len); mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PUBLISH, flags, nc->send_mbuf.len - old_len); } void mg_mqtt_subscribe(struct mg_connection *nc, const struct mg_mqtt_topic_expression *topics, size_t topics_len, uint16_t message_id) { size_t old_len = nc->send_mbuf.len; uint16_t message_id_n = htons(message_id); size_t i; mg_send(nc, (char *) &message_id_n, 2); for (i = 0; i < topics_len; i++) { uint16_t topic_len_n = htons((uint16_t) strlen(topics[i].topic)); mg_send(nc, &topic_len_n, 2); mg_send(nc, topics[i].topic, strlen(topics[i].topic)); mg_send(nc, &topics[i].qos, 1); } mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBSCRIBE, MG_MQTT_QOS(1), nc->send_mbuf.len - old_len); } int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *msg, struct mg_str *topic, uint8_t *qos, int pos) { unsigned char *buf = (unsigned char *) msg->payload.p + pos; if ((size_t) pos >= msg->payload.len) { return -1; } topic->len = buf[0] << 8 | buf[1]; topic->p = (char *) buf + 2; *qos = buf[2 + topic->len]; return pos + 2 + topic->len + 1; } void mg_mqtt_unsubscribe(struct mg_connection *nc, char **topics, size_t topics_len, uint16_t message_id) { size_t old_len = nc->send_mbuf.len; uint16_t message_id_n = htons(message_id); size_t i; mg_send(nc, (char *) &message_id_n, 2); for (i = 0; i < topics_len; i++) { uint16_t topic_len_n = htons((uint16_t) strlen(topics[i])); mg_send(nc, &topic_len_n, 2); mg_send(nc, topics[i], strlen(topics[i])); } mg_mqtt_prepend_header(nc, MG_MQTT_CMD_UNSUBSCRIBE, MG_MQTT_QOS(1), nc->send_mbuf.len - old_len); } void mg_mqtt_connack(struct mg_connection *nc, uint8_t return_code) { uint8_t unused = 0; mg_send(nc, &unused, 1); mg_send(nc, &return_code, 1); mg_mqtt_prepend_header(nc, MG_MQTT_CMD_CONNACK, 0, 2); } /* * Sends a command which contains only a `message_id` and a QoS level of 1. * * Helper function. */ static void mg_send_mqtt_short_command(struct mg_connection *nc, uint8_t cmd, uint16_t message_id) { uint16_t message_id_net = htons(message_id); mg_send(nc, &message_id_net, 2); mg_mqtt_prepend_header(nc, cmd, MG_MQTT_QOS(1), 2); } void mg_mqtt_puback(struct mg_connection *nc, uint16_t message_id) { mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBACK, message_id); } void mg_mqtt_pubrec(struct mg_connection *nc, uint16_t message_id) { mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREC, message_id); } void mg_mqtt_pubrel(struct mg_connection *nc, uint16_t message_id) { mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREL, message_id); } void mg_mqtt_pubcomp(struct mg_connection *nc, uint16_t message_id) { mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBCOMP, message_id); } void mg_mqtt_suback(struct mg_connection *nc, uint8_t *qoss, size_t qoss_len, uint16_t message_id) { size_t i; uint16_t message_id_net = htons(message_id); mg_send(nc, &message_id_net, 2); for (i = 0; i < qoss_len; i++) { mg_send(nc, &qoss[i], 1); } mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBACK, MG_MQTT_QOS(1), 2 + qoss_len); } void mg_mqtt_unsuback(struct mg_connection *nc, uint16_t message_id) { mg_send_mqtt_short_command(nc, MG_MQTT_CMD_UNSUBACK, message_id); } void mg_mqtt_ping(struct mg_connection *nc) { mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGREQ, 0, 0); } void mg_mqtt_pong(struct mg_connection *nc) { mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGRESP, 0, 0); } void mg_mqtt_disconnect(struct mg_connection *nc) { mg_mqtt_prepend_header(nc, MG_MQTT_CMD_DISCONNECT, 0, 0); } #endif /* MG_DISABLE_MQTT */ #ifdef MG_MODULE_LINES #line 1 "./src/mqtt_server.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/mqtt-broker.h" */ #ifdef MG_ENABLE_MQTT_BROKER static void mg_mqtt_session_init(struct mg_mqtt_broker *brk, struct mg_mqtt_session *s, struct mg_connection *nc) { s->brk = brk; s->subscriptions = NULL; s->num_subscriptions = 0; s->nc = nc; } static void mg_mqtt_add_session(struct mg_mqtt_session *s) { s->next = s->brk->sessions; s->brk->sessions = s; s->prev = NULL; if (s->next != NULL) s->next->prev = s; } static void mg_mqtt_remove_session(struct mg_mqtt_session *s) { if (s->prev == NULL) s->brk->sessions = s->next; if (s->prev) s->prev->next = s->next; if (s->next) s->next->prev = s->prev; } static void mg_mqtt_destroy_session(struct mg_mqtt_session *s) { size_t i; for (i = 0; i < s->num_subscriptions; i++) { MG_FREE((void *) s->subscriptions[i].topic); } MG_FREE(s->subscriptions); MG_FREE(s); } static void mg_mqtt_close_session(struct mg_mqtt_session *s) { mg_mqtt_remove_session(s); mg_mqtt_destroy_session(s); } void mg_mqtt_broker_init(struct mg_mqtt_broker *brk, void *user_data) { brk->sessions = NULL; brk->user_data = user_data; } static void mg_mqtt_broker_handle_connect(struct mg_mqtt_broker *brk, struct mg_connection *nc) { struct mg_mqtt_session *s = (struct mg_mqtt_session *) malloc(sizeof *s); if (s == NULL) { /* LCOV_EXCL_START */ mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_SERVER_UNAVAILABLE); return; /* LCOV_EXCL_STOP */ } /* TODO(mkm): check header (magic and version) */ mg_mqtt_session_init(brk, s, nc); s->user_data = nc->user_data; nc->user_data = s; mg_mqtt_add_session(s); mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_ACCEPTED); } static void mg_mqtt_broker_handle_subscribe(struct mg_connection *nc, struct mg_mqtt_message *msg) { struct mg_mqtt_session *ss = (struct mg_mqtt_session *) nc->user_data; uint8_t qoss[512]; size_t qoss_len = 0; struct mg_str topic; uint8_t qos; int pos; struct mg_mqtt_topic_expression *te; for (pos = 0; (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;) { qoss[qoss_len++] = qos; } ss->subscriptions = (struct mg_mqtt_topic_expression *) realloc( ss->subscriptions, sizeof(*ss->subscriptions) * qoss_len); for (pos = 0; (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1; ss->num_subscriptions++) { te = &ss->subscriptions[ss->num_subscriptions]; te->topic = (char *) malloc(topic.len + 1); te->qos = qos; strncpy((char *) te->topic, topic.p, topic.len + 1); } mg_mqtt_suback(nc, qoss, qoss_len, msg->message_id); } /* * Matches a topic against a topic expression * * See http://goo.gl/iWk21X * * Returns 1 if it matches; 0 otherwise. */ static int mg_mqtt_match_topic_expression(const char *exp, const char *topic) { /* TODO(mkm): implement real matching */ int len = strlen(exp); if (strchr(exp, '#')) { len -= 2; } return strncmp(exp, topic, len) == 0; } static void mg_mqtt_broker_handle_publish(struct mg_mqtt_broker *brk, struct mg_mqtt_message *msg) { struct mg_mqtt_session *s; size_t i; for (s = mg_mqtt_next(brk, NULL); s != NULL; s = mg_mqtt_next(brk, s)) { for (i = 0; i < s->num_subscriptions; i++) { if (mg_mqtt_match_topic_expression(s->subscriptions[i].topic, msg->topic)) { mg_mqtt_publish(s->nc, msg->topic, 0, 0, msg->payload.p, msg->payload.len); break; } } } } void mg_mqtt_broker(struct mg_connection *nc, int ev, void *data) { struct mg_mqtt_message *msg = (struct mg_mqtt_message *) data; struct mg_mqtt_broker *brk; if (nc->listener) { brk = (struct mg_mqtt_broker *) nc->listener->user_data; } else { brk = (struct mg_mqtt_broker *) nc->user_data; } switch (ev) { case MG_EV_ACCEPT: mg_set_protocol_mqtt(nc); break; case MG_EV_MQTT_CONNECT: mg_mqtt_broker_handle_connect(brk, nc); break; case MG_EV_MQTT_SUBSCRIBE: mg_mqtt_broker_handle_subscribe(nc, msg); break; case MG_EV_MQTT_PUBLISH: mg_mqtt_broker_handle_publish(brk, msg); break; case MG_EV_CLOSE: if (nc->listener) { mg_mqtt_close_session((struct mg_mqtt_session *) nc->user_data); } break; } } struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *brk, struct mg_mqtt_session *s) { return s == NULL ? brk->sessions : s->next; } #endif /* MG_ENABLE_MQTT_BROKER */ #ifdef MG_MODULE_LINES #line 1 "./src/dns.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef MG_DISABLE_DNS /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/dns.h" */ static int mg_dns_tid = 0xa0; struct mg_dns_header { uint16_t transaction_id; uint16_t flags; uint16_t num_questions; uint16_t num_answers; uint16_t num_authority_prs; uint16_t num_other_prs; }; struct mg_dns_resource_record *mg_dns_next_record( struct mg_dns_message *msg, int query, struct mg_dns_resource_record *prev) { struct mg_dns_resource_record *rr; for (rr = (prev == NULL ? msg->answers : prev + 1); rr - msg->answers < msg->num_answers; rr++) { if (rr->rtype == query) { return rr; } } return NULL; } int mg_dns_parse_record_data(struct mg_dns_message *msg, struct mg_dns_resource_record *rr, void *data, size_t data_len) { switch (rr->rtype) { case MG_DNS_A_RECORD: if (data_len < sizeof(struct in_addr)) { return -1; } if (rr->rdata.p + data_len > msg->pkt.p + msg->pkt.len) { return -1; } memcpy(data, rr->rdata.p, data_len); return 0; #ifdef MG_ENABLE_IPV6 case MG_DNS_AAAA_RECORD: if (data_len < sizeof(struct in6_addr)) { return -1; /* LCOV_EXCL_LINE */ } memcpy(data, rr->rdata.p, data_len); return 0; #endif case MG_DNS_CNAME_RECORD: mg_dns_uncompress_name(msg, &rr->rdata, (char *) data, data_len); return 0; } return -1; } int mg_dns_insert_header(struct mbuf *io, size_t pos, struct mg_dns_message *msg) { struct mg_dns_header header; memset(&header, 0, sizeof(header)); header.transaction_id = msg->transaction_id; header.flags = htons(msg->flags); header.num_questions = htons(msg->num_questions); header.num_answers = htons(msg->num_answers); return mbuf_insert(io, pos, &header, sizeof(header)); } int mg_dns_copy_questions(struct mbuf *io, struct mg_dns_message *msg) { unsigned char *begin, *end; struct mg_dns_resource_record *last_q; if (msg->num_questions <= 0) return 0; begin = (unsigned char *) msg->pkt.p + sizeof(struct mg_dns_header); last_q = &msg->questions[msg->num_questions - 1]; end = (unsigned char *) last_q->name.p + last_q->name.len + 4; return mbuf_append(io, begin, end - begin); } static int mg_dns_encode_name(struct mbuf *io, const char *name, size_t len) { const char *s; unsigned char n; size_t pos = io->len; do { if ((s = strchr(name, '.')) == NULL) { s = name + len; } if (s - name > 127) { return -1; /* TODO(mkm) cover */ } n = s - name; /* chunk length */ mbuf_append(io, &n, 1); /* send length */ mbuf_append(io, name, n); if (*s == '.') { n++; } name += n; len -= n; } while (*s != '\0'); mbuf_append(io, "\0", 1); /* Mark end of host name */ return io->len - pos; } int mg_dns_encode_record(struct mbuf *io, struct mg_dns_resource_record *rr, const char *name, size_t nlen, const void *rdata, size_t rlen) { size_t pos = io->len; uint16_t u16; uint32_t u32; if (rr->kind == MG_DNS_INVALID_RECORD) { return -1; /* LCOV_EXCL_LINE */ } if (mg_dns_encode_name(io, name, nlen) == -1) { return -1; } u16 = htons(rr->rtype); mbuf_append(io, &u16, 2); u16 = htons(rr->rclass); mbuf_append(io, &u16, 2); if (rr->kind == MG_DNS_ANSWER) { u32 = htonl(rr->ttl); mbuf_append(io, &u32, 4); if (rr->rtype == MG_DNS_CNAME_RECORD) { int clen; /* fill size after encoding */ size_t off = io->len; mbuf_append(io, &u16, 2); if ((clen = mg_dns_encode_name(io, (const char *) rdata, rlen)) == -1) { return -1; } u16 = clen; io->buf[off] = u16 >> 8; io->buf[off + 1] = u16 & 0xff; } else { u16 = htons((uint16_t) rlen); mbuf_append(io, &u16, 2); mbuf_append(io, rdata, rlen); } } return io->len - pos; } void mg_send_dns_query(struct mg_connection *nc, const char *name, int query_type) { struct mg_dns_message *msg = (struct mg_dns_message *) MG_CALLOC(1, sizeof(*msg)); struct mbuf pkt; struct mg_dns_resource_record *rr = &msg->questions[0]; DBG(("%s %d", name, query_type)); mbuf_init(&pkt, 64 /* Start small, it'll grow as needed. */); msg->transaction_id = ++mg_dns_tid; msg->flags = 0x100; msg->num_questions = 1; mg_dns_insert_header(&pkt, 0, msg); rr->rtype = query_type; rr->rclass = 1; /* Class: inet */ rr->kind = MG_DNS_QUESTION; if (mg_dns_encode_record(&pkt, rr, name, strlen(name), NULL, 0) == -1) { /* TODO(mkm): return an error code */ goto cleanup; /* LCOV_EXCL_LINE */ } /* TCP DNS requires messages to be prefixed with len */ if (!(nc->flags & MG_F_UDP)) { uint16_t len = htons((uint16_t) pkt.len); mbuf_insert(&pkt, 0, &len, 2); } mg_send(nc, pkt.buf, pkt.len); mbuf_free(&pkt); cleanup: MG_FREE(msg); } static unsigned char *mg_parse_dns_resource_record( unsigned char *data, unsigned char *end, struct mg_dns_resource_record *rr, int reply) { unsigned char *name = data; int chunk_len, data_len; while (data < end && (chunk_len = *data)) { if (((unsigned char *) data)[0] & 0xc0) { data += 1; break; } data += chunk_len + 1; } if (data > end - 5) { return NULL; } rr->name.p = (char *) name; rr->name.len = data - name + 1; data++; rr->rtype = data[0] << 8 | data[1]; data += 2; rr->rclass = data[0] << 8 | data[1]; data += 2; rr->kind = reply ? MG_DNS_ANSWER : MG_DNS_QUESTION; if (reply) { if (data >= end - 6) { return NULL; } rr->ttl = (uint32_t) data[0] << 24 | (uint32_t) data[1] << 16 | data[2] << 8 | data[3]; data += 4; data_len = *data << 8 | *(data + 1); data += 2; rr->rdata.p = (char *) data; rr->rdata.len = data_len; data += data_len; } return data; } int mg_parse_dns(const char *buf, int len, struct mg_dns_message *msg) { struct mg_dns_header *header = (struct mg_dns_header *) buf; unsigned char *data = (unsigned char *) buf + sizeof(*header); unsigned char *end = (unsigned char *) buf + len; int i; memset(msg, 0, sizeof(*msg)); msg->pkt.p = buf; msg->pkt.len = len; if (len < (int) sizeof(*header)) return -1; msg->transaction_id = header->transaction_id; msg->flags = ntohs(header->flags); msg->num_questions = ntohs(header->num_questions); if (msg->num_questions > (int) ARRAY_SIZE(msg->questions)) { msg->num_questions = (int) ARRAY_SIZE(msg->questions); } msg->num_answers = ntohs(header->num_answers); if (msg->num_answers > (int) ARRAY_SIZE(msg->answers)) { msg->num_answers = (int) ARRAY_SIZE(msg->answers); } for (i = 0; i < msg->num_questions; i++) { data = mg_parse_dns_resource_record(data, end, &msg->questions[i], 0); if (data == NULL) return -1; } for (i = 0; i < msg->num_answers; i++) { data = mg_parse_dns_resource_record(data, end, &msg->answers[i], 1); if (data == NULL) return -1; } return 0; } size_t mg_dns_uncompress_name(struct mg_dns_message *msg, struct mg_str *name, char *dst, int dst_len) { int chunk_len; char *old_dst = dst; const unsigned char *data = (unsigned char *) name->p; const unsigned char *end = (unsigned char *) msg->pkt.p + msg->pkt.len; if (data >= end) { return 0; } while ((chunk_len = *data++)) { int leeway = dst_len - (dst - old_dst); if (data >= end) { return 0; } if (chunk_len & 0xc0) { uint16_t off = (data[-1] & (~0xc0)) << 8 | data[0]; if (off >= msg->pkt.len) { return 0; } data = (unsigned char *) msg->pkt.p + off; continue; } if (chunk_len > leeway) { chunk_len = leeway; } if (data + chunk_len >= end) { return 0; } memcpy(dst, data, chunk_len); data += chunk_len; dst += chunk_len; leeway -= chunk_len; if (leeway == 0) { return dst - old_dst; } *dst++ = '.'; } if (dst != old_dst) { *--dst = 0; } return dst - old_dst; } static void dns_handler(struct mg_connection *nc, int ev, void *ev_data) { struct mbuf *io = &nc->recv_mbuf; struct mg_dns_message msg; /* Pass low-level events to the user handler */ nc->handler(nc, ev, ev_data); switch (ev) { case MG_EV_RECV: if (!(nc->flags & MG_F_UDP)) { mbuf_remove(&nc->recv_mbuf, 2); } if (mg_parse_dns(nc->recv_mbuf.buf, nc->recv_mbuf.len, &msg) == -1) { /* reply + recursion allowed + format error */ memset(&msg, 0, sizeof(msg)); msg.flags = 0x8081; mg_dns_insert_header(io, 0, &msg); if (!(nc->flags & MG_F_UDP)) { uint16_t len = htons((uint16_t) io->len); mbuf_insert(io, 0, &len, 2); } mg_send(nc, io->buf, io->len); } else { /* Call user handler with parsed message */ nc->handler(nc, MG_DNS_MESSAGE, &msg); } mbuf_remove(io, io->len); break; } } void mg_set_protocol_dns(struct mg_connection *nc) { nc->proto_handler = dns_handler; } #endif /* MG_DISABLE_DNS */ #ifdef MG_MODULE_LINES #line 1 "./src/dns_server.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifdef MG_ENABLE_DNS_SERVER /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/dns-server.h" */ struct mg_dns_reply mg_dns_create_reply(struct mbuf *io, struct mg_dns_message *msg) { struct mg_dns_reply rep; rep.msg = msg; rep.io = io; rep.start = io->len; /* reply + recursion allowed */ msg->flags |= 0x8080; mg_dns_copy_questions(io, msg); msg->num_answers = 0; return rep; } void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) { size_t sent = r->io->len - r->start; mg_dns_insert_header(r->io, r->start, r->msg); if (!(nc->flags & MG_F_UDP)) { uint16_t len = htons((uint16_t) sent); mbuf_insert(r->io, r->start, &len, 2); } if (&nc->send_mbuf != r->io) { mg_send(nc, r->io->buf + r->start, r->io->len - r->start); r->io->len = r->start; } } int mg_dns_reply_record(struct mg_dns_reply *reply, struct mg_dns_resource_record *question, const char *name, int rtype, int ttl, const void *rdata, size_t rdata_len) { struct mg_dns_message *msg = (struct mg_dns_message *) reply->msg; char rname[512]; struct mg_dns_resource_record *ans = &msg->answers[msg->num_answers]; if (msg->num_answers >= MG_MAX_DNS_ANSWERS) { return -1; /* LCOV_EXCL_LINE */ } if (name == NULL) { name = rname; rname[511] = 0; mg_dns_uncompress_name(msg, &question->name, rname, sizeof(rname) - 1); } *ans = *question; ans->kind = MG_DNS_ANSWER; ans->rtype = rtype; ans->ttl = ttl; if (mg_dns_encode_record(reply->io, ans, name, strlen(name), rdata, rdata_len) == -1) { return -1; /* LCOV_EXCL_LINE */ }; msg->num_answers++; return 0; } #endif /* MG_ENABLE_DNS_SERVER */ #ifdef MG_MODULE_LINES #line 1 "./src/resolv.c" #endif /* * Copyright (c) 2014 Cesanta Software Limited * All rights reserved */ #ifndef MG_DISABLE_RESOLVER /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/resolv.h" */ #ifndef MG_DEFAULT_NAMESERVER #define MG_DEFAULT_NAMESERVER "8.8.8.8" #endif static const char *mg_default_dns_server = "udp://" MG_DEFAULT_NAMESERVER ":53"; MG_INTERNAL char mg_dns_server[256]; struct mg_resolve_async_request { char name[1024]; int query; mg_resolve_callback_t callback; void *data; time_t timeout; int max_retries; enum mg_resolve_err err; /* state */ time_t last_time; int retries; }; /* * Find what nameserver to use. * * Return 0 if OK, -1 if error */ static int mg_get_ip_address_of_nameserver(char *name, size_t name_len) { int ret = -1; #ifdef _WIN32 int i; LONG err; HKEY hKey, hSub; char subkey[512], value[128], *key = "SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces"; if ((err = RegOpenKeyA(HKEY_LOCAL_MACHINE, key, &hKey)) != ERROR_SUCCESS) { fprintf(stderr, "cannot open reg key %s: %ld\n", key, err); ret = -1; } else { for (ret = -1, i = 0; RegEnumKeyA(hKey, i, subkey, sizeof(subkey)) == ERROR_SUCCESS; i++) { DWORD type, len = sizeof(value); if (RegOpenKeyA(hKey, subkey, &hSub) == ERROR_SUCCESS && (RegQueryValueExA(hSub, "NameServer", 0, &type, (void *) value, &len) == ERROR_SUCCESS || RegQueryValueExA(hSub, "DhcpNameServer", 0, &type, (void *) value, &len) == ERROR_SUCCESS)) { /* * See https://github.com/cesanta/mongoose/issues/176 * The value taken from the registry can be empty, a single * IP address, or multiple IP addresses separated by comma. * If it's empty, check the next interface. * If it's multiple IP addresses, take the first one. */ char *comma = strchr(value, ','); if (value[0] == '\0') { continue; } if (comma != NULL) { *comma = '\0'; } snprintf(name, name_len, "udp://%s:53", value); ret = 0; RegCloseKey(hSub); break; } } RegCloseKey(hKey); } #elif !defined(MG_DISABLE_FILESYSTEM) FILE *fp; char line[512]; if ((fp = fopen("/etc/resolv.conf", "r")) == NULL) { ret = -1; } else { /* Try to figure out what nameserver to use */ for (ret = -1; fgets(line, sizeof(line), fp) != NULL;) { char buf[256]; if (sscanf(line, "nameserver %255[^\n\t #]s", buf) == 1) { snprintf(name, name_len, "udp://%s:53", buf); ret = 0; break; } } (void) fclose(fp); } #else snprintf(name, name_len, "%s", mg_default_dns_server); #endif /* _WIN32 */ return ret; } int mg_resolve_from_hosts_file(const char *name, union socket_address *usa) { #ifndef MG_DISABLE_FILESYSTEM /* TODO(mkm) cache /etc/hosts */ FILE *fp; char line[1024]; char *p; char alias[256]; unsigned int a, b, c, d; int len = 0; if ((fp = fopen("/etc/hosts", "r")) == NULL) { return -1; } for (; fgets(line, sizeof(line), fp) != NULL;) { if (line[0] == '#') continue; if (sscanf(line, "%u.%u.%u.%u%n", &a, &b, &c, &d, &len) == 0) { /* TODO(mkm): handle ipv6 */ continue; } for (p = line + len; sscanf(p, "%s%n", alias, &len) == 1; p += len) { if (strcmp(alias, name) == 0) { usa->sin.sin_addr.s_addr = htonl(a << 24 | b << 16 | c << 8 | d); fclose(fp); return 0; } } } fclose(fp); #endif return -1; } static void mg_resolve_async_eh(struct mg_connection *nc, int ev, void *data) { time_t now = time(NULL); struct mg_resolve_async_request *req; struct mg_dns_message *msg; DBG(("ev=%d user_data=%p", ev, nc->user_data)); req = (struct mg_resolve_async_request *) nc->user_data; if (req == NULL) { return; } switch (ev) { case MG_EV_CONNECT: case MG_EV_POLL: if (req->retries > req->max_retries) { req->err = MG_RESOLVE_EXCEEDED_RETRY_COUNT; nc->flags |= MG_F_CLOSE_IMMEDIATELY; break; } if (now - req->last_time >= req->timeout) { mg_send_dns_query(nc, req->name, req->query); req->last_time = now; req->retries++; } break; case MG_EV_RECV: msg = (struct mg_dns_message *) MG_MALLOC(sizeof(*msg)); if (mg_parse_dns(nc->recv_mbuf.buf, *(int *) data, msg) == 0 && msg->num_answers > 0) { req->callback(msg, req->data, MG_RESOLVE_OK); nc->user_data = NULL; MG_FREE(req); } else { req->err = MG_RESOLVE_NO_ANSWERS; } MG_FREE(msg); nc->flags |= MG_F_CLOSE_IMMEDIATELY; break; case MG_EV_SEND: /* * If a send error occurs, prevent closing of the connection by the core. * We will retry after timeout. */ nc->flags &= ~MG_F_CLOSE_IMMEDIATELY; mbuf_remove(&nc->send_mbuf, nc->send_mbuf.len); break; case MG_EV_TIMER: req->err = MG_RESOLVE_TIMEOUT; nc->flags |= MG_F_CLOSE_IMMEDIATELY; break; case MG_EV_CLOSE: /* If we got here with request still not done, fire an error callback. */ if (req != NULL) { req->callback(NULL, req->data, req->err); nc->user_data = NULL; MG_FREE(req); } break; } } int mg_resolve_async(struct mg_mgr *mgr, const char *name, int query, mg_resolve_callback_t cb, void *data) { struct mg_resolve_async_opts opts; memset(&opts, 0, sizeof(opts)); return mg_resolve_async_opt(mgr, name, query, cb, data, opts); } int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query, mg_resolve_callback_t cb, void *data, struct mg_resolve_async_opts opts) { struct mg_resolve_async_request *req; struct mg_connection *dns_nc; const char *nameserver = opts.nameserver_url; DBG(("%s %d %p", name, query, opts.dns_conn)); /* resolve with DNS */ req = (struct mg_resolve_async_request *) MG_CALLOC(1, sizeof(*req)); if (req == NULL) { return -1; } strncpy(req->name, name, sizeof(req->name)); req->query = query; req->callback = cb; req->data = data; /* TODO(mkm): parse defaults out of resolve.conf */ req->max_retries = opts.max_retries ? opts.max_retries : 2; req->timeout = opts.timeout ? opts.timeout : 5; /* Lazily initialize dns server */ if (nameserver == NULL && mg_dns_server[0] == '\0' && mg_get_ip_address_of_nameserver(mg_dns_server, sizeof(mg_dns_server)) == -1) { strncpy(mg_dns_server, mg_default_dns_server, sizeof(mg_dns_server)); } if (nameserver == NULL) { nameserver = mg_dns_server; } dns_nc = mg_connect(mgr, nameserver, mg_resolve_async_eh); if (dns_nc == NULL) { free(req); return -1; } dns_nc->user_data = req; if (opts.dns_conn != NULL) { *opts.dns_conn = dns_nc; } return 0; } #endif /* MG_DISABLE_RESOLVE */ #ifdef MG_MODULE_LINES #line 1 "./src/coap.c" #endif /* * Copyright (c) 2015 Cesanta Software Limited * All rights reserved * This software is dual-licensed: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. For the terms of this * license, see . * * You are free to use this software under the terms of the GNU General * Public License, but WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * Alternatively, you can license this software under a commercial * license, as set out in . */ /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/coap.h" */ #ifdef MG_ENABLE_COAP void mg_coap_free_options(struct mg_coap_message *cm) { while (cm->options != NULL) { struct mg_coap_option *next = cm->options->next; MG_FREE(cm->options); cm->options = next; } } struct mg_coap_option *mg_coap_add_option(struct mg_coap_message *cm, uint32_t number, char *value, size_t len) { struct mg_coap_option *new_option = (struct mg_coap_option *) MG_CALLOC(1, sizeof(*new_option)); new_option->number = number; new_option->value.p = value; new_option->value.len = len; if (cm->options == NULL) { cm->options = cm->optiomg_tail = new_option; } else { /* * A very simple attention to help clients to compose options: * CoAP wants to see options ASC ordered. * Could be change by using sort in coap_compose */ if (cm->optiomg_tail->number <= new_option->number) { /* if option is already ordered just add it */ cm->optiomg_tail = cm->optiomg_tail->next = new_option; } else { /* looking for appropriate position */ struct mg_coap_option *current_opt = cm->options; struct mg_coap_option *prev_opt = 0; while (current_opt != NULL) { if (current_opt->number > new_option->number) { break; } prev_opt = current_opt; current_opt = current_opt->next; } if (prev_opt != NULL) { prev_opt->next = new_option; new_option->next = current_opt; } else { /* insert new_option to the beginning */ new_option->next = cm->options; cm->options = new_option; } } } return new_option; } /* * Fills CoAP header in mg_coap_message. * * Helper function. */ static char *coap_parse_header(char *ptr, struct mbuf *io, struct mg_coap_message *cm) { if (io->len < sizeof(uint32_t)) { cm->flags |= MG_COAP_NOT_ENOUGH_DATA; return NULL; } /* * Version (Ver): 2-bit unsigned integer. Indicates the CoAP version * number. Implementations of this specification MUST set this field * to 1 (01 binary). Other values are reserved for future versions. * Messages with unknown version numbers MUST be silently ignored. */ if (((uint8_t) *ptr >> 6) != 1) { cm->flags |= MG_COAP_IGNORE; return NULL; } /* * Type (T): 2-bit unsigned integer. Indicates if this message is of * type Confirmable (0), Non-confirmable (1), Acknowledgement (2), or * Reset (3). */ cm->msg_type = ((uint8_t) *ptr & 0x30) >> 4; cm->flags |= MG_COAP_MSG_TYPE_FIELD; /* * Token Length (TKL): 4-bit unsigned integer. Indicates the length of * the variable-length Token field (0-8 bytes). Lengths 9-15 are * reserved, MUST NOT be sent, and MUST be processed as a message * format error. */ cm->token.len = *ptr & 0x0F; if (cm->token.len > 8) { cm->flags |= MG_COAP_FORMAT_ERROR; return NULL; } ptr++; /* * Code: 8-bit unsigned integer, split into a 3-bit class (most * significant bits) and a 5-bit detail (least significant bits) */ cm->code_class = (uint8_t) *ptr >> 5; cm->code_detail = *ptr & 0x1F; cm->flags |= (MG_COAP_CODE_CLASS_FIELD | MG_COAP_CODE_DETAIL_FIELD); ptr++; /* Message ID: 16-bit unsigned integer in network byte order. */ cm->msg_id = (uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1); cm->flags |= MG_COAP_MSG_ID_FIELD; ptr += 2; return ptr; } /* * Fills token information in mg_coap_message. * * Helper function. */ static char *coap_get_token(char *ptr, struct mbuf *io, struct mg_coap_message *cm) { if (cm->token.len != 0) { if (ptr + cm->token.len > io->buf + io->len) { cm->flags |= MG_COAP_NOT_ENOUGH_DATA; return NULL; } else { cm->token.p = ptr; ptr += cm->token.len; cm->flags |= MG_COAP_TOKEN_FIELD; } } return ptr; } /* * Returns Option Delta or Length. * * Helper function. */ static int coap_get_ext_opt(char *ptr, struct mbuf *io, uint16_t *opt_info) { int ret = 0; if (*opt_info == 13) { /* * 13: An 8-bit unsigned integer follows the initial byte and * indicates the Option Delta/Length minus 13. */ if (ptr < io->buf + io->len) { *opt_info = (uint8_t) *ptr + 13; ret = sizeof(uint8_t); } else { ret = -1; /* LCOV_EXCL_LINE */ } } else if (*opt_info == 14) { /* * 14: A 16-bit unsigned integer in network byte order follows the * initial byte and indicates the Option Delta/Length minus 269. */ if (ptr + sizeof(uint8_t) < io->buf + io->len) { *opt_info = ((uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1)) + 269; ret = sizeof(uint16_t); } else { ret = -1; /* LCOV_EXCL_LINE */ } } return ret; } /* * Fills options in mg_coap_message. * * Helper function. * * General options format: * +---------------+---------------+ * | Option Delta | Option Length | 1 byte * +---------------+---------------+ * \ Option Delta (extended) \ 0-2 bytes * +-------------------------------+ * / Option Length (extended) \ 0-2 bytes * +-------------------------------+ * \ Option Value \ 0 or more bytes * +-------------------------------+ */ static char *coap_get_options(char *ptr, struct mbuf *io, struct mg_coap_message *cm) { uint16_t prev_opt = 0; if (ptr == io->buf + io->len) { /* end of packet, ok */ return NULL; } /* 0xFF is payload marker */ while (ptr < io->buf + io->len && (uint8_t) *ptr != 0xFF) { uint16_t option_delta, option_lenght; int optinfo_len; /* Option Delta: 4-bit unsigned integer */ option_delta = ((uint8_t) *ptr & 0xF0) >> 4; /* Option Length: 4-bit unsigned integer */ option_lenght = *ptr & 0x0F; if (option_delta == 15 || option_lenght == 15) { /* * 15: Reserved for future use. If the field is set to this value, * it MUST be processed as a message format error */ cm->flags |= MG_COAP_FORMAT_ERROR; break; } ptr++; /* check for extended option delta */ optinfo_len = coap_get_ext_opt(ptr, io, &option_delta); if (optinfo_len == -1) { cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ break; /* LCOV_EXCL_LINE */ } ptr += optinfo_len; /* check or extended option lenght */ optinfo_len = coap_get_ext_opt(ptr, io, &option_lenght); if (optinfo_len == -1) { cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ break; /* LCOV_EXCL_LINE */ } ptr += optinfo_len; /* * Instead of specifying the Option Number directly, the instances MUST * appear in order of their Option Numbers and a delta encoding is used * between them. */ option_delta += prev_opt; mg_coap_add_option(cm, option_delta, ptr, option_lenght); prev_opt = option_delta; if (ptr + option_lenght > io->buf + io->len) { cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ break; /* LCOV_EXCL_LINE */ } ptr += option_lenght; } if ((cm->flags & MG_COAP_ERROR) != 0) { mg_coap_free_options(cm); return NULL; } cm->flags |= MG_COAP_OPTIOMG_FIELD; if (ptr == io->buf + io->len) { /* end of packet, ok */ return NULL; } ptr++; return ptr; } uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm) { char *ptr; memset(cm, 0, sizeof(*cm)); if ((ptr = coap_parse_header(io->buf, io, cm)) == NULL) { return cm->flags; } if ((ptr = coap_get_token(ptr, io, cm)) == NULL) { return cm->flags; } if ((ptr = coap_get_options(ptr, io, cm)) == NULL) { return cm->flags; } /* the rest is payload */ cm->payload.len = io->len - (ptr - io->buf); if (cm->payload.len != 0) { cm->payload.p = ptr; cm->flags |= MG_COAP_PAYLOAD_FIELD; } return cm->flags; } /* * Calculates extended size of given Opt Number/Length in coap message. * * Helper function. */ static size_t coap_get_ext_opt_size(uint32_t value) { int ret = 0; if (value >= 13 && value <= 0xFF + 13) { ret = sizeof(uint8_t); } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) { ret = sizeof(uint16_t); } return ret; } /* * Splits given Opt Number/Length into base and ext values. * * Helper function. */ static int coap_split_opt(uint32_t value, uint8_t *base, uint16_t *ext) { int ret = 0; if (value < 13) { *base = value; } else if (value >= 13 && value <= 0xFF + 13) { *base = 13; *ext = value - 13; ret = sizeof(uint8_t); } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) { *base = 14; *ext = value - 269; ret = sizeof(uint16_t); } return ret; } /* * Puts uint16_t (in network order) into given char stream. * * Helper function. */ static char *coap_add_uint16(char *ptr, uint16_t val) { *ptr = val >> 8; ptr++; *ptr = val & 0x00FF; ptr++; return ptr; } /* * Puts extended value of Opt Number/Length into given char stream. * * Helper function. */ static char *coap_add_opt_info(char *ptr, uint16_t val, size_t len) { if (len == sizeof(uint8_t)) { *ptr = (char) val; ptr++; } else if (len == sizeof(uint16_t)) { ptr = coap_add_uint16(ptr, val); } return ptr; } /* * Verifies given mg_coap_message and calculates message size for it. * * Helper function. */ static uint32_t coap_calculate_packet_size(struct mg_coap_message *cm, size_t *len) { struct mg_coap_option *opt; uint32_t prev_opt_number; *len = 4; /* header */ if (cm->msg_type > MG_COAP_MSG_MAX) { return MG_COAP_ERROR | MG_COAP_MSG_TYPE_FIELD; } if (cm->token.len > 8) { return MG_COAP_ERROR | MG_COAP_TOKEN_FIELD; } if (cm->code_class > 7) { return MG_COAP_ERROR | MG_COAP_CODE_CLASS_FIELD; } if (cm->code_detail > 31) { return MG_COAP_ERROR | MG_COAP_CODE_DETAIL_FIELD; } *len += cm->token.len; if (cm->payload.len != 0) { *len += cm->payload.len + 1; /* ... + 1; add payload marker */ } opt = cm->options; prev_opt_number = 0; while (opt != NULL) { *len += 1; /* basic delta/length */ *len += coap_get_ext_opt_size(opt->number); *len += coap_get_ext_opt_size((uint32_t) opt->value.len); /* * Current implementation performs check if * option_number > previous option_number and produces an error * TODO(alashkin): write design doc with limitations * May be resorting is more suitable solution. */ if ((opt->next != NULL && opt->number > opt->next->number) || opt->value.len > 0xFFFF + 269 || opt->number - prev_opt_number > 0xFFFF + 269) { return MG_COAP_ERROR | MG_COAP_OPTIOMG_FIELD; } *len += opt->value.len; opt = opt->next; } return 0; } uint32_t mg_coap_compose(struct mg_coap_message *cm, struct mbuf *io) { struct mg_coap_option *opt; uint32_t res, prev_opt_number; size_t prev_io_len, packet_size; char *ptr; res = coap_calculate_packet_size(cm, &packet_size); if (res != 0) { return res; } /* saving previous lenght to handle non-empty mbuf */ prev_io_len = io->len; mbuf_append(io, NULL, packet_size); ptr = io->buf + prev_io_len; /* * since cm is verified, it is possible to use bits shift operator * without additional zeroing of unused bits */ /* ver: 2 bits, msg_type: 2 bits, toklen: 4 bits */ *ptr = (1 << 6) | (cm->msg_type << 4) | (uint8_t)(cm->token.len); ptr++; /* code class: 3 bits, code detail: 5 bits */ *ptr = (cm->code_class << 5) | (cm->code_detail); ptr++; ptr = coap_add_uint16(ptr, cm->msg_id); if (cm->token.len != 0) { memcpy(ptr, cm->token.p, cm->token.len); ptr += cm->token.len; } opt = cm->options; prev_opt_number = 0; while (opt != NULL) { uint8_t delta_base = 0, length_base = 0; uint16_t delta_ext, length_ext; size_t opt_delta_len = coap_split_opt(opt->number - prev_opt_number, &delta_base, &delta_ext); size_t opt_lenght_len = coap_split_opt((uint32_t) opt->value.len, &length_base, &length_ext); *ptr = (delta_base << 4) | length_base; ptr++; ptr = coap_add_opt_info(ptr, delta_ext, opt_delta_len); ptr = coap_add_opt_info(ptr, length_ext, opt_lenght_len); if (opt->value.len != 0) { memcpy(ptr, opt->value.p, opt->value.len); ptr += opt->value.len; } prev_opt_number = opt->number; opt = opt->next; } if (cm->payload.len != 0) { *ptr = -1; ptr++; memcpy(ptr, cm->payload.p, cm->payload.len); } return 0; } uint32_t mg_coap_send_message(struct mg_connection *nc, struct mg_coap_message *cm) { struct mbuf packet_out; uint32_t compose_res; mbuf_init(&packet_out, 0); compose_res = mg_coap_compose(cm, &packet_out); if (compose_res != 0) { return compose_res; /* LCOV_EXCL_LINE */ } mg_send(nc, packet_out.buf, (int) packet_out.len); mbuf_free(&packet_out); return 0; } uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id) { struct mg_coap_message cm; memset(&cm, 0, sizeof(cm)); cm.msg_type = MG_COAP_MSG_ACK; cm.msg_id = msg_id; return mg_coap_send_message(nc, &cm); } static void coap_handler(struct mg_connection *nc, int ev, void *ev_data) { struct mbuf *io = &nc->recv_mbuf; struct mg_coap_message cm; uint32_t parse_res; memset(&cm, 0, sizeof(cm)); nc->handler(nc, ev, ev_data); switch (ev) { case MG_EV_RECV: parse_res = mg_coap_parse(io, &cm); if ((parse_res & MG_COAP_IGNORE) == 0) { if ((cm.flags & MG_COAP_NOT_ENOUGH_DATA) != 0) { /* * Since we support UDP only * MG_COAP_NOT_ENOUGH_DATA == MG_COAP_FORMAT_ERROR */ cm.flags |= MG_COAP_FORMAT_ERROR; /* LCOV_EXCL_LINE */ } /* LCOV_EXCL_LINE */ nc->handler(nc, MG_COAP_EVENT_BASE + cm.msg_type, &cm); } mg_coap_free_options(&cm); mbuf_remove(io, io->len); break; } } /* * Attach built-in CoAP event handler to the given connection. * * The user-defined event handler will receive following extra events: * * - MG_EV_COAP_CON * - MG_EV_COAP_NOC * - MG_EV_COAP_ACK * - MG_EV_COAP_RST */ int mg_set_protocol_coap(struct mg_connection *nc) { /* supports UDP only */ if ((nc->flags & MG_F_UDP) == 0) { return -1; } nc->proto_handler = coap_handler; return 0; } #endif /* MG_DISABLE_COAP */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/cc3200/cc3200_libc.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #if CS_PLATFORM == CS_P_CC3200 #include #include #ifndef __TI_COMPILER_VERSION__ #include #include #include #include #endif #include #include #include #include #include #include #include #define CONSOLE_UART UARTA0_BASE #ifdef __TI_COMPILER_VERSION__ int asprintf(char **strp, const char *fmt, ...) { va_list ap; int len; *strp = malloc(BUFSIZ); if (*strp == NULL) return -1; va_start(ap, fmt); len = vsnprintf(*strp, BUFSIZ, fmt, ap); va_end(ap); if (len > 0) { *strp = realloc(*strp, len + 1); if (*strp == NULL) return -1; } if (len >= BUFSIZ) { va_start(ap, fmt); len = vsnprintf(*strp, len + 1, fmt, ap); va_end(ap); } return len; } #if MG_TI_NO_HOST_INTERFACE time_t HOSTtime() { struct timeval tp; gettimeofday(&tp, NULL); return tp.tv_sec; } #endif #endif /* __TI_COMPILER_VERSION__ */ #ifndef __TI_COMPILER_VERSION__ int _gettimeofday_r(struct _reent *r, struct timeval *tp, void *tzp) { #else int gettimeofday(struct timeval *tp, void *tzp) { #endif unsigned long long r1 = 0, r2; /* Achieve two consecutive reads of the same value. */ do { r2 = r1; r1 = PRCMSlowClkCtrFastGet(); } while (r1 != r2); /* This is a 32768 Hz counter. */ tp->tv_sec = (r1 >> 15); /* 1/32768-th of a second is 30.517578125 microseconds, approx. 31, * but we round down so it doesn't overflow at 32767 */ tp->tv_usec = (r1 & 0x7FFF) * 30; return 0; } void fprint_str(FILE *fp, const char *str) { while (*str != '\0') { if (*str == '\n') MAP_UARTCharPut(CONSOLE_UART, '\r'); MAP_UARTCharPut(CONSOLE_UART, *str++); } } void _exit(int status) { fprint_str(stderr, "_exit\n"); /* cause an unaligned access exception, that will drop you into gdb */ *(int *) 1 = status; while (1) ; /* avoid gcc warning because stdlib abort() has noreturn attribute */ } void _not_implemented(const char *what) { fprint_str(stderr, what); fprint_str(stderr, " is not implemented\n"); _exit(42); } int _kill(int pid, int sig) { (void) pid; (void) sig; _not_implemented("_kill"); return -1; } int _getpid() { fprint_str(stderr, "_getpid is not implemented\n"); return 42; } int _isatty(int fd) { /* 0, 1 and 2 are TTYs. */ return fd < 2; } #endif /* CS_PLATFORM == CS_P_CC3200 */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/msp432/msp432_libc.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #if CS_PLATFORM == CS_P_MSP432 #include #include int gettimeofday(struct timeval *tp, void *tzp) { uint32_t ticks = Clock_getTicks(); tp->tv_sec = ticks / 1000; tp->tv_usec = (ticks % 1000) * 1000; return 0; } #endif /* CS_PLATFORM == CS_P_MSP432 */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_fs_slfs.h" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #ifndef CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ #define CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ #if defined(MG_FS_SLFS) #include #ifndef __TI_COMPILER_VERSION__ #include #include #endif #define MAX_OPEN_SLFS_FILES 8 /* Indirect libc interface - same functions, different names. */ int fs_slfs_open(const char *pathname, int flags, mode_t mode); int fs_slfs_close(int fd); ssize_t fs_slfs_read(int fd, void *buf, size_t count); ssize_t fs_slfs_write(int fd, const void *buf, size_t count); int fs_slfs_stat(const char *pathname, struct stat *s); int fs_slfs_fstat(int fd, struct stat *s); off_t fs_slfs_lseek(int fd, off_t offset, int whence); int fs_slfs_unlink(const char *filename); int fs_slfs_rename(const char *from, const char *to); void fs_slfs_set_new_file_size(const char *name, size_t size); #endif /* defined(MG_FS_SLFS) */ #endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_fs_slfs.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ /* Standard libc interface to TI SimpleLink FS. */ #if defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS) /* Amalgamated: #include "common/platforms/simplelink/sl_fs_slfs.h" */ #include #if CS_PLATFORM == CS_P_CC3200 #include #endif #include #include /* Amalgamated: #include "common/cs_dbg.h" */ extern int set_errno(int e); /* From sl_fs.c */ /* * With SLFS, you have to pre-declare max file size. Yes. Really. * 64K should be enough for everyone. Right? */ #ifndef FS_SLFS_MAX_FILE_SIZE #define FS_SLFS_MAX_FILE_SIZE (64 * 1024) #endif struct sl_file_size_hint { char *name; size_t size; }; struct sl_fd_info { _i32 fh; _off_t pos; size_t size; }; static struct sl_fd_info s_sl_fds[MAX_OPEN_SLFS_FILES]; static struct sl_file_size_hint s_sl_file_size_hints[MAX_OPEN_SLFS_FILES]; static int sl_fs_to_errno(_i32 r) { DBG(("SL error: %d", (int) r)); switch (r) { case SL_FS_OK: return 0; case SL_FS_FILE_NAME_EXIST: return EEXIST; case SL_FS_WRONG_FILE_NAME: return EINVAL; case SL_FS_ERR_NO_AVAILABLE_NV_INDEX: case SL_FS_ERR_NO_AVAILABLE_BLOCKS: return ENOSPC; case SL_FS_ERR_FAILED_TO_ALLOCATE_MEM: return ENOMEM; case SL_FS_ERR_FILE_NOT_EXISTS: return ENOENT; case SL_FS_ERR_NOT_SUPPORTED: return ENOTSUP; } return ENXIO; } int fs_slfs_open(const char *pathname, int flags, mode_t mode) { int fd; for (fd = 0; fd < MAX_OPEN_SLFS_FILES; fd++) { if (s_sl_fds[fd].fh <= 0) break; } if (fd >= MAX_OPEN_SLFS_FILES) return set_errno(ENOMEM); struct sl_fd_info *fi = &s_sl_fds[fd]; _u32 am = 0; fi->size = (size_t) -1; if (pathname[0] == '/') pathname++; int rw = (flags & 3); if (rw == O_RDONLY) { SlFsFileInfo_t sl_fi; _i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi); if (r == SL_FS_OK) { fi->size = sl_fi.FileLen; } am = FS_MODE_OPEN_READ; } else { if (!(flags & O_TRUNC) || (flags & O_APPEND)) { // FailFS files cannot be opened for append and will be truncated // when opened for write. return set_errno(ENOTSUP); } if (flags & O_CREAT) { size_t i, size = FS_SLFS_MAX_FILE_SIZE; for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) { if (s_sl_file_size_hints[i].name != NULL && strcmp(s_sl_file_size_hints[i].name, pathname) == 0) { size = s_sl_file_size_hints[i].size; free(s_sl_file_size_hints[i].name); s_sl_file_size_hints[i].name = NULL; break; } } DBG(("creating %s with max size %d", pathname, (int) size)); am = FS_MODE_OPEN_CREATE(size, 0); } else { am = FS_MODE_OPEN_WRITE; } } _i32 r = sl_FsOpen((_u8 *) pathname, am, NULL, &fi->fh); DBG(("sl_FsOpen(%s, 0x%x) = %d, %d", pathname, (int) am, (int) r, (int) fi->fh)); if (r == SL_FS_OK) { fi->pos = 0; r = fd; } else { fi->fh = -1; r = set_errno(sl_fs_to_errno(r)); } return r; } int fs_slfs_close(int fd) { struct sl_fd_info *fi = &s_sl_fds[fd]; if (fi->fh <= 0) return set_errno(EBADF); _i32 r = sl_FsClose(fi->fh, NULL, NULL, 0); DBG(("sl_FsClose(%d) = %d", (int) fi->fh, (int) r)); s_sl_fds[fd].fh = -1; return set_errno(sl_fs_to_errno(r)); } ssize_t fs_slfs_read(int fd, void *buf, size_t count) { struct sl_fd_info *fi = &s_sl_fds[fd]; if (fi->fh <= 0) return set_errno(EBADF); /* Simulate EOF. sl_FsRead @ file_size return SL_FS_ERR_OFFSET_OUT_OF_RANGE. */ if (fi->pos == fi->size) return 0; _i32 r = sl_FsRead(fi->fh, fi->pos, buf, count); DBG(("sl_FsRead(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count, (int) r)); if (r >= 0) { fi->pos += r; return r; } return set_errno(sl_fs_to_errno(r)); } ssize_t fs_slfs_write(int fd, const void *buf, size_t count) { struct sl_fd_info *fi = &s_sl_fds[fd]; if (fi->fh <= 0) return set_errno(EBADF); _i32 r = sl_FsWrite(fi->fh, fi->pos, (_u8 *) buf, count); DBG(("sl_FsWrite(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count, (int) r)); if (r >= 0) { fi->pos += r; return r; } return set_errno(sl_fs_to_errno(r)); } int fs_slfs_stat(const char *pathname, struct stat *s) { SlFsFileInfo_t sl_fi; _i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi); if (r == SL_FS_OK) { s->st_mode = S_IFREG | 0666; s->st_nlink = 1; s->st_size = sl_fi.FileLen; return 0; } return set_errno(sl_fs_to_errno(r)); } int fs_slfs_fstat(int fd, struct stat *s) { struct sl_fd_info *fi = &s_sl_fds[fd]; if (fi->fh <= 0) return set_errno(EBADF); s->st_mode = 0666; s->st_mode = S_IFREG | 0666; s->st_nlink = 1; s->st_size = fi->size; return 0; } off_t fs_slfs_lseek(int fd, off_t offset, int whence) { if (s_sl_fds[fd].fh <= 0) return set_errno(EBADF); switch (whence) { case SEEK_SET: s_sl_fds[fd].pos = offset; break; case SEEK_CUR: s_sl_fds[fd].pos += offset; break; case SEEK_END: return set_errno(ENOTSUP); } return 0; } int fs_slfs_unlink(const char *filename) { return set_errno(sl_fs_to_errno(sl_FsDel((const _u8 *) filename, 0))); } int fs_slfs_rename(const char *from, const char *to) { return set_errno(ENOTSUP); } void fs_slfs_set_new_file_size(const char *name, size_t size) { int i; for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) { if (s_sl_file_size_hints[i].name == NULL) { DBG(("File size hint: %s %d", name, (int) size)); s_sl_file_size_hints[i].name = strdup(name); s_sl_file_size_hints[i].size = size; break; } } } #endif /* defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS) */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_fs.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #if defined(MG_SOCKET_SIMPLELINK) && \ (defined(MG_FS_SLFS) || defined(MG_FS_SPIFFS)) #include #include #include #include #ifdef __TI_COMPILER_VERSION__ #include #endif /* Amalgamated: #include "common/cs_dbg.h" */ /* Amalgamated: #include "common/platform.h" */ #ifdef CC3200_FS_SPIFFS /* Amalgamated: #include "cc3200_fs_spiffs.h" */ #endif #ifdef MG_FS_SLFS /* Amalgamated: #include "sl_fs_slfs.h" */ #endif #define NUM_SYS_FDS 3 #define SPIFFS_FD_BASE 10 #define SLFS_FD_BASE 100 #ifndef MG_UART_CHAR_PUT #if CS_PLATFORM == CS_P_CC3200 #include #include #include #include #include #define MG_UART_CHAR_PUT(fd, c) MAP_UARTCharPut(UARTA0_BASE, c); #else #define MG_UART_CHAR_PUT(fd, c) #endif /* CS_PLATFORM == CS_P_CC3200 */ #endif /* !MG_UART_CHAR_PUT */ int set_errno(int e) { errno = e; return (e == 0 ? 0 : -1); } static int is_sl_fname(const char *fname) { return strncmp(fname, "SL:", 3) == 0; } static const char *sl_fname(const char *fname) { return fname + 3; } static const char *drop_dir(const char *fname) { if (*fname == '.') fname++; if (*fname == '/') fname++; return fname; } enum fd_type { FD_INVALID, FD_SYS, #ifdef CC3200_FS_SPIFFS FD_SPIFFS, #endif #ifdef MG_FS_SLFS FD_SLFS #endif }; static int fd_type(int fd) { if (fd >= 0 && fd < NUM_SYS_FDS) return FD_SYS; #ifdef CC3200_FS_SPIFFS if (fd >= SPIFFS_FD_BASE && fd < SPIFFS_FD_BASE + MAX_OPEN_SPIFFS_FILES) { return FD_SPIFFS; } #endif #ifdef MG_FS_SLFS if (fd >= SLFS_FD_BASE && fd < SLFS_FD_BASE + MAX_OPEN_SLFS_FILES) { return FD_SLFS; } #endif return FD_INVALID; } #if MG_TI_NO_HOST_INTERFACE int open(const char *pathname, unsigned flags, int mode) { #else int _open(const char *pathname, int flags, mode_t mode) { #endif int fd = -1; pathname = drop_dir(pathname); if (is_sl_fname(pathname)) { #ifdef MG_FS_SLFS fd = fs_slfs_open(sl_fname(pathname), flags, mode); if (fd >= 0) fd += SLFS_FD_BASE; #endif } else { #ifdef CC3200_FS_SPIFFS fd = fs_spiffs_open(pathname, flags, mode); if (fd >= 0) fd += SPIFFS_FD_BASE; #endif } DBG(("open(%s, 0x%x) = %d", pathname, flags, fd)); return fd; } int _stat(const char *pathname, struct stat *st) { int res = -1; const char *fname = pathname; int is_sl = is_sl_fname(pathname); if (is_sl) fname = sl_fname(pathname); fname = drop_dir(fname); memset(st, 0, sizeof(*st)); /* Simulate statting the root directory. */ if (strcmp(fname, "") == 0) { st->st_ino = 0; st->st_mode = S_IFDIR | 0777; st->st_nlink = 1; st->st_size = 0; return 0; } if (is_sl) { #ifdef MG_FS_SLFS res = fs_slfs_stat(fname, st); #endif } else { #ifdef CC3200_FS_SPIFFS res = fs_spiffs_stat(fname, st); #endif } DBG(("stat(%s) = %d; fname = %s", pathname, res, fname)); return res; } #if MG_TI_NO_HOST_INTERFACE int close(int fd) { #else int _close(int fd) { #endif int r = -1; switch (fd_type(fd)) { case FD_INVALID: r = set_errno(EBADF); break; case FD_SYS: r = set_errno(EACCES); break; #ifdef CC3200_FS_SPIFFS case FD_SPIFFS: r = fs_spiffs_close(fd - SPIFFS_FD_BASE); break; #endif #ifdef MG_FS_SLFS case FD_SLFS: r = fs_slfs_close(fd - SLFS_FD_BASE); break; #endif } DBG(("close(%d) = %d", fd, r)); return r; } #if MG_TI_NO_HOST_INTERFACE off_t lseek(int fd, off_t offset, int whence) { #else off_t _lseek(int fd, off_t offset, int whence) { #endif int r = -1; switch (fd_type(fd)) { case FD_INVALID: r = set_errno(EBADF); break; case FD_SYS: r = set_errno(ESPIPE); break; #ifdef CC3200_FS_SPIFFS case FD_SPIFFS: r = fs_spiffs_lseek(fd - SPIFFS_FD_BASE, offset, whence); break; #endif #ifdef MG_FS_SLFS case FD_SLFS: r = fs_slfs_lseek(fd - SLFS_FD_BASE, offset, whence); break; #endif } DBG(("lseek(%d, %d, %d) = %d", fd, (int) offset, whence, r)); return r; } int _fstat(int fd, struct stat *s) { int r = -1; memset(s, 0, sizeof(*s)); switch (fd_type(fd)) { case FD_INVALID: r = set_errno(EBADF); break; case FD_SYS: { /* Create barely passable stats for STD{IN,OUT,ERR}. */ memset(s, 0, sizeof(*s)); s->st_ino = fd; s->st_mode = S_IFCHR | 0666; r = 0; break; } #ifdef CC3200_FS_SPIFFS case FD_SPIFFS: r = fs_spiffs_fstat(fd - SPIFFS_FD_BASE, s); break; #endif #ifdef MG_FS_SLFS case FD_SLFS: r = fs_slfs_fstat(fd - SLFS_FD_BASE, s); break; #endif } DBG(("fstat(%d) = %d", fd, r)); return r; } #if MG_TI_NO_HOST_INTERFACE int read(int fd, char *buf, unsigned count) { #else ssize_t _read(int fd, void *buf, size_t count) { #endif int r = -1; switch (fd_type(fd)) { case FD_INVALID: r = set_errno(EBADF); break; case FD_SYS: { if (fd != 0) { r = set_errno(EACCES); break; } /* Should we allow reading from stdin = uart? */ r = set_errno(ENOTSUP); break; } #ifdef CC3200_FS_SPIFFS case FD_SPIFFS: r = fs_spiffs_read(fd - SPIFFS_FD_BASE, buf, count); break; #endif #ifdef MG_FS_SLFS case FD_SLFS: r = fs_slfs_read(fd - SLFS_FD_BASE, buf, count); break; #endif } DBG(("read(%d, %u) = %d", fd, count, r)); return r; } #if MG_TI_NO_HOST_INTERFACE int write(int fd, const char *buf, unsigned count) { #else ssize_t _write(int fd, const void *buf, size_t count) { #endif int r = -1; size_t i = 0; switch (fd_type(fd)) { case FD_INVALID: r = set_errno(EBADF); break; case FD_SYS: { if (fd == 0) { r = set_errno(EACCES); break; } for (i = 0; i < count; i++) { const char c = ((const char *) buf)[i]; if (c == '\n') MG_UART_CHAR_PUT(fd, '\r'); MG_UART_CHAR_PUT(fd, c); } r = count; break; } #ifdef CC3200_FS_SPIFFS case FD_SPIFFS: r = fs_spiffs_write(fd - SPIFFS_FD_BASE, buf, count); break; #endif #ifdef MG_FS_SLFS case FD_SLFS: r = fs_slfs_write(fd - SLFS_FD_BASE, buf, count); break; #endif } return r; } /* * On Newlib we override rename directly too, because the default * implementation using _link and _unlink doesn't work for us. */ #if MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION) int rename(const char *from, const char *to) { int r = -1; from = drop_dir(from); to = drop_dir(to); if (is_sl_fname(from) || is_sl_fname(to)) { #ifdef MG_FS_SLFS r = fs_slfs_rename(sl_fname(from), sl_fname(to)); #endif } else { #ifdef CC3200_FS_SPIFFS r = fs_spiffs_rename(from, to); #endif } DBG(("rename(%s, %s) = %d", from, to, r)); return r; } #endif /* MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION) */ #if MG_TI_NO_HOST_INTERFACE int unlink(const char *filename) { #else int _unlink(const char *filename) { #endif int r = -1; filename = drop_dir(filename); if (is_sl_fname(filename)) { #ifdef MG_FS_SLFS r = fs_slfs_unlink(sl_fname(filename)); #endif } else { #ifdef CC3200_FS_SPIFFS r = fs_spiffs_unlink(filename); #endif } DBG(("unlink(%s) = %d", filename, r)); return r; } #ifdef CC3200_FS_SPIFFS /* FailFS does not support listing files. */ DIR *opendir(const char *dir_name) { DIR *r = NULL; if (is_sl_fname(dir_name)) { r = NULL; set_errno(ENOTSUP); } else { r = fs_spiffs_opendir(dir_name); } DBG(("opendir(%s) = %p", dir_name, r)); return r; } struct dirent *readdir(DIR *dir) { struct dirent *res = fs_spiffs_readdir(dir); DBG(("readdir(%p) = %p", dir, res)); return res; } int closedir(DIR *dir) { int res = fs_spiffs_closedir(dir); DBG(("closedir(%p) = %d", dir, res)); return res; } int rmdir(const char *path) { return fs_spiffs_rmdir(path); } int mkdir(const char *path, mode_t mode) { (void) path; (void) mode; /* for spiffs supports only root dir, which comes from mongoose as '.' */ return (strlen(path) == 1 && *path == '.') ? 0 : ENOTDIR; } #endif int sl_fs_init(void) { int ret = 1; #ifdef __TI_COMPILER_VERSION__ #ifdef MG_FS_SLFS #pragma diag_push #pragma diag_suppress 169 /* Nothing we can do about the prototype mismatch. */ ret = (add_device("SL", _MSA, fs_slfs_open, fs_slfs_close, fs_slfs_read, fs_slfs_write, fs_slfs_lseek, fs_slfs_unlink, fs_slfs_rename) == 0); #pragma diag_pop #endif #endif return ret; } #endif /* defined(MG_SOCKET_SIMPLELINK) && (defined(MG_FS_SLFS) || \ defined(MG_FS_SPIFFS)) */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_socket.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #ifdef MG_SOCKET_SIMPLELINK #include #include /* Amalgamated: #include "common/platform.h" */ const char *inet_ntop(int af, const void *src, char *dst, socklen_t size) { int res; struct in_addr *in = (struct in_addr *) src; if (af != AF_INET) { errno = EAFNOSUPPORT; return NULL; } res = snprintf(dst, size, "%lu.%lu.%lu.%lu", SL_IPV4_BYTE(in->s_addr, 0), SL_IPV4_BYTE(in->s_addr, 1), SL_IPV4_BYTE(in->s_addr, 2), SL_IPV4_BYTE(in->s_addr, 3)); return res > 0 ? dst : NULL; } char *inet_ntoa(struct in_addr n) { static char a[16]; return (char *) inet_ntop(AF_INET, &n, a, sizeof(a)); } int inet_pton(int af, const char *src, void *dst) { uint32_t a0, a1, a2, a3; uint8_t *db = (uint8_t *) dst; if (af != AF_INET) { errno = EAFNOSUPPORT; return 0; } if (sscanf(src, "%lu.%lu.%lu.%lu", &a0, &a1, &a2, &a3) != 4) { return 0; } *db = a3; *(db + 1) = a2; *(db + 2) = a1; *(db + 3) = a0; return 1; } #endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_SOCKET_C_ */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_mg_task.c" #endif #if defined(MG_SOCKET_SIMPLELINK) && !defined(MG_SIMPLELINK_NO_OSI) /* Amalgamated: #include "mg_task.h" */ #include enum mg_q_msg_type { MG_Q_MSG_CB, }; struct mg_q_msg { enum mg_q_msg_type type; void (*cb)(struct mg_mgr *mgr, void *arg); void *arg; }; static OsiMsgQ_t s_mg_q; static void mg_task(void *arg); bool mg_start_task(int priority, int stack_size, mg_init_cb mg_init) { if (osi_MsgQCreate(&s_mg_q, "MG", sizeof(struct mg_q_msg), 16) != OSI_OK) { return false; } if (osi_TaskCreate(mg_task, (const signed char *) "MG", stack_size, (void *) mg_init, priority, NULL) != OSI_OK) { return false; } return true; } static void mg_task(void *arg) { struct mg_mgr mgr; mg_init_cb mg_init = (mg_init_cb) arg; mg_mgr_init(&mgr, NULL); mg_init(&mgr); while (1) { struct mg_q_msg msg; mg_mgr_poll(&mgr, 1); if (osi_MsgQRead(&s_mg_q, &msg, 1) != OSI_OK) continue; switch (msg.type) { case MG_Q_MSG_CB: { msg.cb(&mgr, msg.arg); } } } } void mg_run_in_task(void (*cb)(struct mg_mgr *mgr, void *arg), void *cb_arg) { struct mg_q_msg msg = {MG_Q_MSG_CB, cb, cb_arg}; osi_MsgQWrite(&s_mg_q, &msg, OSI_NO_WAIT); } #endif /* defined(MG_SOCKET_SIMPLELINK) */ #ifdef MG_MODULE_LINES #line 1 "./src/../../common/platforms/simplelink/sl_net_if.c" #endif /* * Copyright (c) 2014-2016 Cesanta Software Limited * All rights reserved */ #if !defined(MG_DISABLE_SOCKET_IF) && defined(MG_SOCKET_SIMPLELINK) /* Amalgamated: #include "mongoose/src/internal.h" */ /* Amalgamated: #include "mongoose/src/util.h" */ #define MG_TCP_RECV_BUFFER_SIZE 1024 #define MG_UDP_RECV_BUFFER_SIZE 1500 static sock_t mg_open_listening_socket(union socket_address *sa, int type, int proto); #ifdef MG_ENABLE_SSL const char *mg_set_ssl2(struct mg_connection *nc, const char *cert, const char *key, const char *ca_cert) { DBG(("%p %s,%s,%s", nc, (cert ? cert : "-"), (key ? key : "-"), (ca_cert ? ca_cert : "-"))); if (nc->flags & MG_F_UDP) { return "SSL for UDP is not supported"; } if (cert != NULL || key != NULL) { if (cert != NULL && key != NULL) { nc->ssl_cert = strdup(cert); nc->ssl_key = strdup(key); } else { return "both cert and key are required"; } } if (ca_cert != NULL && strcmp(ca_cert, "*") != 0) { nc->ssl_ca_cert = strdup(ca_cert); } nc->flags |= MG_F_SSL; return NULL; } int sl_set_ssl_opts(struct mg_connection *nc) { int err; DBG(("%p %s,%s,%s,%s", nc, (nc->ssl_cert ? nc->ssl_cert : "-"), (nc->ssl_key ? nc->ssl_cert : "-"), (nc->ssl_ca_cert ? nc->ssl_ca_cert : "-"), (nc->ssl_server_name ? nc->ssl_server_name : "-"))); if (nc->ssl_cert != NULL && nc->ssl_key != NULL) { err = sl_SetSockOpt(nc->sock, SL_SOL_SOCKET, SL_SO_SECURE_FILES_CERTIFICATE_FILE_NAME, nc->ssl_cert, strlen(nc->ssl_cert)); DBG(("CERTIFICATE_FILE_NAME %s -> %d", nc->ssl_cert, err)); if (err != 0) return err; err = sl_SetSockOpt(nc->sock, SL_SOL_SOCKET, SL_SO_SECURE_FILES_PRIVATE_KEY_FILE_NAME, nc->ssl_key, strlen(nc->ssl_key)); DBG(("PRIVATE_KEY_FILE_NAME %s -> %d", nc->ssl_key, nc->err)); if (err != 0) return err; } if (nc->ssl_ca_cert != NULL) { if (nc->ssl_ca_cert[0] != '\0') { err = sl_SetSockOpt(nc->sock, SL_SOL_SOCKET, SL_SO_SECURE_FILES_CA_FILE_NAME, nc->ssl_ca_cert, strlen(nc->ssl_ca_cert)); DBG(("CA_FILE_NAME %s -> %d", nc->ssl_ca_cert, err)); if (err != 0) return err; } } if (nc->ssl_server_name != NULL) { err = sl_SetSockOpt(nc->sock, SL_SOL_SOCKET, SO_SECURE_DOMAIN_NAME_VERIFICATION, nc->ssl_server_name, strlen(nc->ssl_server_name)); DBG(("DOMAIN_NAME_VERIFICATION %s -> %d", nc->ssl_server_name, err)); /* Domain name verificationw as added in a NWP service pack, older versions * return SL_ENOPROTOOPT. There isn't much we can do about it, so we ignore * the error. */ if (err != 0 && err != SL_ENOPROTOOPT) return err; } return 0; } #endif void mg_set_non_blocking_mode(sock_t sock) { SlSockNonblocking_t opt; opt.NonblockingEnabled = 1; sl_SetSockOpt(sock, SL_SOL_SOCKET, SL_SO_NONBLOCKING, &opt, sizeof(opt)); } static int mg_is_error(int n) { return (n < 0 && n != SL_EALREADY && n != SL_EAGAIN); } void mg_if_connect_tcp(struct mg_connection *nc, const union socket_address *sa) { int proto = 0; if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET; sock_t sock = sl_Socket(AF_INET, SOCK_STREAM, proto); if (sock < 0) { nc->err = sock; goto out; } mg_sock_set(nc, sock); #ifdef MG_ENABLE_SSL nc->err = sl_set_ssl_opts(nc); if (nc->err != 0) goto out; #endif nc->err = sl_Connect(sock, &sa->sa, sizeof(sa->sin)); out: DBG(("%p to %s:%d sock %d %d err %d", nc, inet_ntoa(sa->sin.sin_addr), ntohs(sa->sin.sin_port), nc->sock, proto, nc->err)); } void mg_if_connect_udp(struct mg_connection *nc) { sock_t sock = sl_Socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { nc->err = sock; return; } mg_sock_set(nc, sock); nc->err = 0; } int mg_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { int proto = 0; if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET; sock_t sock = mg_open_listening_socket(sa, SOCK_STREAM, proto); if (sock < 0) return sock; mg_sock_set(nc, sock); #ifdef MG_ENABLE_SSL return sl_set_ssl_opts(nc); #else return 0; #endif } int mg_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { sock_t sock = mg_open_listening_socket(sa, SOCK_DGRAM, 0); if (sock == INVALID_SOCKET) return (errno ? errno : 1); mg_sock_set(nc, sock); return 0; } void mg_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) { mbuf_append(&nc->send_mbuf, buf, len); } void mg_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) { mbuf_append(&nc->send_mbuf, buf, len); } void mg_if_recved(struct mg_connection *nc, size_t len) { (void) nc; (void) len; } int mg_if_create_conn(struct mg_connection *nc) { (void) nc; return 1; } void mg_if_destroy_conn(struct mg_connection *nc) { if (nc->sock == INVALID_SOCKET) return; /* For UDP, only close outgoing sockets or listeners. */ if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) { sl_Close(nc->sock); } nc->sock = INVALID_SOCKET; #ifdef MG_ENABLE_SSL MG_FREE(nc->ssl_cert); MG_FREE(nc->ssl_key); MG_FREE(nc->ssl_ca_cert); MG_FREE(nc->ssl_server_name); #endif } static int mg_accept_conn(struct mg_connection *lc) { struct mg_connection *nc; union socket_address sa; socklen_t sa_len = sizeof(sa); sock_t sock = sl_Accept(lc->sock, &sa.sa, &sa_len); if (sock < 0) { DBG(("%p: failed to accept: %d", lc, sock)); return 0; } nc = mg_if_accept_new_conn(lc); if (nc == NULL) { sl_Close(sock); return 0; } DBG(("%p conn from %s:%d", nc, inet_ntoa(sa.sin.sin_addr), ntohs(sa.sin.sin_port))); mg_sock_set(nc, sock); if (nc->flags & MG_F_SSL) nc->flags |= MG_F_SSL_HANDSHAKE_DONE; mg_if_accept_tcp_cb(nc, &sa, sa_len); return 1; } /* 'sa' must be an initialized address to bind to */ static sock_t mg_open_listening_socket(union socket_address *sa, int type, int proto) { int r; socklen_t sa_len = (sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6); sock_t sock = sl_Socket(sa->sa.sa_family, type, proto); if (sock < 0) return sock; if ((r = sl_Bind(sock, &sa->sa, sa_len)) < 0) { sl_Close(sock); return r; } if (type != SOCK_DGRAM && (r = sl_Listen(sock, SOMAXCONN)) < 0) { sl_Close(sock); return r; } mg_set_non_blocking_mode(sock); return sock; } static void mg_write_to_socket(struct mg_connection *nc) { struct mbuf *io = &nc->send_mbuf; int n = 0; if (nc->flags & MG_F_UDP) { n = sl_SendTo(nc->sock, io->buf, io->len, 0, &nc->sa.sa, sizeof(nc->sa.sin)); DBG(("%p %d %d %d %s:%hu", nc, nc->sock, n, errno, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); } else { n = (int) sl_Send(nc->sock, io->buf, io->len, 0); DBG(("%p %d bytes -> %d", nc, n, nc->sock)); } if (n > 0) { mbuf_remove(io, n); mg_if_sent_cb(nc, n); } else if (n < 0 && mg_is_error(n)) { /* Something went wrong, drop the connection. */ nc->flags |= MG_F_CLOSE_IMMEDIATELY; } } MG_INTERNAL size_t recv_avail_size(struct mg_connection *conn, size_t max) { size_t avail; if (conn->recv_mbuf_limit < conn->recv_mbuf.len) return 0; avail = conn->recv_mbuf_limit - conn->recv_mbuf.len; return avail > max ? max : avail; } static void mg_handle_tcp_read(struct mg_connection *conn) { int n = 0; char *buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); if (buf == NULL) { DBG(("OOM")); return; } n = (int) sl_Recv(conn->sock, buf, recv_avail_size(conn, MG_TCP_RECV_BUFFER_SIZE), 0); DBG(("%p %d bytes <- %d", conn, n, conn->sock)); if (n > 0) { mg_if_recv_tcp_cb(conn, buf, n); } else { MG_FREE(buf); } if (n == 0) { /* Orderly shutdown of the socket, try flushing output. */ conn->flags |= MG_F_SEND_AND_CLOSE; } else if (mg_is_error(n)) { conn->flags |= MG_F_CLOSE_IMMEDIATELY; } } static void mg_handle_udp_read(struct mg_connection *nc) { char *buf = (char *) MG_MALLOC(MG_UDP_RECV_BUFFER_SIZE); if (buf == NULL) return; union socket_address sa; socklen_t sa_len = sizeof(sa); int n = sl_RecvFrom(nc->sock, buf, MG_UDP_RECV_BUFFER_SIZE, 0, (SlSockAddr_t *) &sa, &sa_len); DBG(("%p %d bytes from %s:%d", nc, n, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); if (n > 0) { mg_if_recv_udp_cb(nc, buf, n, &sa, sa_len); } else { MG_FREE(buf); } } #define _MG_F_FD_CAN_READ 1 #define _MG_F_FD_CAN_WRITE 1 << 1 #define _MG_F_FD_ERROR 1 << 2 void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, double now) { DBG(("%p fd=%d fd_flags=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, fd_flags, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); if (nc->flags & MG_F_CONNECTING) { if (nc->flags & MG_F_UDP || nc->err != SL_EALREADY) { mg_if_connect_cb(nc, nc->err); } else { /* In SimpleLink, to get status of non-blocking connect() we need to wait * until socket is writable and repeat the call to sl_Connect again, * which will now return the real status. */ if (fd_flags & _MG_F_FD_CAN_WRITE) { nc->err = sl_Connect(nc->sock, &nc->sa.sa, sizeof(nc->sa.sin)); DBG(("%p conn res=%d", nc, nc->err)); if (nc->err == SL_ESECSNOVERIFY || /* TODO(rojer): Provide API to set the date for verification. */ nc->err == SL_ESECDATEERROR) { nc->err = 0; } if (nc->flags & MG_F_SSL && nc->err == 0) { nc->flags |= MG_F_SSL_HANDSHAKE_DONE; } mg_if_connect_cb(nc, nc->err); } } /* Ignore read/write in further processing, we've handled it. */ fd_flags &= ~(_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE); } if (fd_flags & _MG_F_FD_CAN_READ) { if (nc->flags & MG_F_UDP) { mg_handle_udp_read(nc); } else { if (nc->flags & MG_F_LISTENING) { mg_accept_conn(nc); } else { mg_handle_tcp_read(nc); } } } if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { if ((fd_flags & _MG_F_FD_CAN_WRITE) && nc->send_mbuf.len > 0) { mg_write_to_socket(nc); } if (!(fd_flags & (_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE))) { mg_if_poll(nc, now); } mg_if_timer(nc, now); } DBG(("%p after fd=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); } /* Associate a socket to a connection. */ void mg_sock_set(struct mg_connection *nc, sock_t sock) { mg_set_non_blocking_mode(sock); nc->sock = sock; DBG(("%p %d", nc, sock)); } void mg_ev_mgr_init(struct mg_mgr *mgr) { (void) mgr; DBG(("%p using sl_Select()", mgr)); } void mg_ev_mgr_free(struct mg_mgr *mgr) { (void) mgr; } void mg_ev_mgr_add_conn(struct mg_connection *nc) { (void) nc; } void mg_ev_mgr_remove_conn(struct mg_connection *nc) { (void) nc; } time_t mg_mgr_poll(struct mg_mgr *mgr, int timeout_ms) { double now = mg_time(); double min_timer; struct mg_connection *nc, *tmp; struct SlTimeval_t tv; SlFdSet_t read_set, write_set, err_set; sock_t max_fd = INVALID_SOCKET; int num_fds, num_ev, num_timers = 0; SL_FD_ZERO(&read_set); SL_FD_ZERO(&write_set); SL_FD_ZERO(&err_set); /* * Note: it is ok to have connections with sock == INVALID_SOCKET in the list, * e.g. timer-only "connections". */ min_timer = 0; for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) { tmp = nc->next; if (nc->sock != INVALID_SOCKET) { num_fds++; if (!(nc->flags & MG_F_WANT_WRITE) && nc->recv_mbuf.len < nc->recv_mbuf_limit && (!(nc->flags & MG_F_UDP) || nc->listener == NULL)) { SL_FD_SET(nc->sock, &read_set); if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock; } if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) || (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) { SL_FD_SET(nc->sock, &write_set); SL_FD_SET(nc->sock, &err_set); if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock; } } if (nc->ev_timer_time > 0) { if (num_timers == 0 || nc->ev_timer_time < min_timer) { min_timer = nc->ev_timer_time; } num_timers++; } } /* * If there is a timer to be fired earlier than the requested timeout, * adjust the timeout. */ if (num_timers > 0) { double timer_timeout_ms = (min_timer - mg_time()) * 1000 + 1 /* rounding */; if (timer_timeout_ms < timeout_ms) { timeout_ms = timer_timeout_ms; } } if (timeout_ms < 0) timeout_ms = 0; tv.tv_sec = timeout_ms / 1000; tv.tv_usec = (timeout_ms % 1000) * 1000; num_ev = sl_Select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv); now = mg_time(); DBG(("sl_Select @ %ld num_ev=%d of %d, timeout=%d", (long) now, num_ev, num_fds, timeout_ms)); for (nc = mgr->active_connections; nc != NULL; nc = tmp) { int fd_flags = 0; if (nc->sock != INVALID_SOCKET) { if (num_ev > 0) { fd_flags = (SL_FD_ISSET(nc->sock, &read_set) && (!(nc->flags & MG_F_UDP) || nc->listener == NULL) ? _MG_F_FD_CAN_READ : 0) | (SL_FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE : 0) | (SL_FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0); } /* SimpleLink does not report UDP sockets as writeable. */ if (nc->flags & MG_F_UDP && nc->send_mbuf.len > 0) { fd_flags |= _MG_F_FD_CAN_WRITE; } } tmp = nc->next; mg_mgr_handle_conn(nc, fd_flags, now); } for (nc = mgr->active_connections; nc != NULL; nc = tmp) { tmp = nc->next; if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) { mg_close_conn(nc); } } return now; } void mg_if_get_conn_addr(struct mg_connection *nc, int remote, union socket_address *sa) { /* SimpleLink does not provide a way to get socket's peer address after * accept or connect. Address hould have been preserved in the connection, * so we do our best here by using it. */ if (remote) memcpy(sa, &nc->sa, sizeof(*sa)); } void sl_restart_cb(struct mg_mgr *mgr) { /* * SimpleLink has been restarted, meaning all sockets have been invalidated. * We try our best - we'll restart the listeners, but for outgoing * connections we have no option but to terminate. */ struct mg_connection *nc; for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) { if (nc->sock == INVALID_SOCKET) continue; /* Could be a timer */ if (nc->flags & MG_F_LISTENING) { DBG(("restarting %p %s:%d", nc, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); int res = (nc->flags & MG_F_UDP ? mg_if_listen_udp(nc, &nc->sa) : mg_if_listen_tcp(nc, &nc->sa)); if (res == 0) continue; /* Well, we tried and failed. Fall through to closing. */ } nc->sock = INVALID_SOCKET; DBG(("terminating %p %s:%d", nc, inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); /* TODO(rojer): Outgoing UDP? */ nc->flags |= MG_F_CLOSE_IMMEDIATELY; } } #endif /* !defined(MG_DISABLE_SOCKET_IF) && defined(MG_SOCKET_SIMPLELINK) */