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// Copyright (c) 2004-2013 Sergey Lyubka
// Copyright (c) 2013-2022 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 http://www.gnu.org/licenses/
//
// 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 https://www.mongoose.ws/licensing/
//
// SPDX-License-Identifier: GPL-2.0-only or commercial
#ifndef MONGOOSE_H
#define MONGOOSE_H
#define MG_VERSION "7.12"
#ifdef __cplusplus
extern "C" {
#endif
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#define MG_ARCH_CUSTOM 0 // User creates its own mongoose_custom.h
#define MG_ARCH_UNIX 1 // Linux, BSD, Mac, ...
#define MG_ARCH_WIN32 2 // Windows
#define MG_ARCH_ESP32 3 // ESP32
#define MG_ARCH_ESP8266 4 // ESP8266
#define MG_ARCH_FREERTOS 5 // FreeRTOS
#define MG_ARCH_AZURERTOS 6 // MS Azure RTOS
#define MG_ARCH_ZEPHYR 7 // Zephyr RTOS
#define MG_ARCH_NEWLIB 8 // Bare metal ARM
#define MG_ARCH_CMSIS_RTOS1 9 // CMSIS-RTOS API v1 (Keil RTX)
#define MG_ARCH_TIRTOS 10 // Texas Semi TI-RTOS
#define MG_ARCH_RP2040 11 // Raspberry Pi RP2040
#define MG_ARCH_ARMCC 12 // Keil MDK-Core with Configuration Wizard
#define MG_ARCH_CMSIS_RTOS2 13 // CMSIS-RTOS API v2 (Keil RTX5, FreeRTOS)
#define MG_ARCH_RTTHREAD 14 // RT-Thread RTOS
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#if !defined(MG_ARCH)
#if defined(__unix__) || defined(__APPLE__)
#define MG_ARCH MG_ARCH_UNIX
#elif defined(_WIN32)
#define MG_ARCH MG_ARCH_WIN32
#elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
#define MG_ARCH MG_ARCH_ESP8266
#elif defined(__ZEPHYR__)
#define MG_ARCH MG_ARCH_ZEPHYR
#elif defined(ESP_PLATFORM)
#define MG_ARCH MG_ARCH_ESP32
#elif defined(FREERTOS_IP_H)
#define MG_ARCH MG_ARCH_FREERTOS
#define MG_ENABLE_FREERTOS_TCP 1
#elif defined(AZURE_RTOS_THREADX)
#define MG_ARCH MG_ARCH_AZURERTOS
#elif defined(PICO_TARGET_NAME)
#define MG_ARCH MG_ARCH_RP2040
#elif defined(__ARMCC_VERSION)
#define MG_ARCH MG_ARCH_ARMCC
#elif defined(__RTTHREAD__)
#define MG_ARCH MG_ARCH_RTTHREAD
#endif
#endif // !defined(MG_ARCH)
// if the user did not specify an MG_ARCH, or specified a custom one, OR
// we guessed a known IDE, pull the customized config (Configuration Wizard)
#if !defined(MG_ARCH) || (MG_ARCH == MG_ARCH_CUSTOM) || MG_ARCH == MG_ARCH_ARMCC
#include "mongoose_custom.h" // keep this include
#endif
#if !defined(MG_ARCH)
#error "MG_ARCH is not specified and we couldn't guess it. Set -D MG_ARCH=..."
#endif
// http://esr.ibiblio.org/?p=5095
#define MG_BIG_ENDIAN (*(uint16_t *) "\0\xff" < 0x100)
#if MG_ARCH == MG_ARCH_AZURERTOS
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include <fx_api.h>
#include <tx_api.h>
#include <nx_api.h>
#include <nx_bsd.h>
#include <nx_port.h>
#include <tx_port.h>
#define PATH_MAX FX_MAXIMUM_PATH
#define MG_DIRSEP '\\'
#define socklen_t int
#define closesocket(x) soc_close(x)
#undef FOPEN_MAX
#endif
#if MG_ARCH == MG_ARCH_ESP32
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <esp_timer.h>
#define MG_PATH_MAX 128
#endif
#if MG_ARCH == MG_ARCH_ESP8266
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <esp_system.h>
#define MG_PATH_MAX 128
#endif
#if MG_ARCH == MG_ARCH_FREERTOS
#include <ctype.h>
#if !defined(MG_ENABLE_LWIP) || !MG_ENABLE_LWIP
#include <errno.h>
#endif
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h> // rand(), strtol(), atoi()
#include <string.h>
#if defined(__ARMCC_VERSION)
#define mode_t size_t
#include <time.h>
#else
#include <sys/stat.h>
#endif
#include <FreeRTOS.h>
#include <task.h>
#ifndef MG_IO_SIZE
#define MG_IO_SIZE 512
#endif
#define calloc(a, b) mg_calloc(a, b)
#define free(a) vPortFree(a)
#define malloc(a) pvPortMalloc(a)
#define strdup(s) ((char *) mg_strdup(mg_str(s)).ptr)
// Re-route calloc/free to the FreeRTOS's functions, don't use stdlib
static inline void *mg_calloc(size_t cnt, size_t size) {
void *p = pvPortMalloc(cnt * size);
if (p != NULL) memset(p, 0, size * cnt);
return p;
}
#define mkdir(a, b) mg_mkdir(a, b)
static inline int mg_mkdir(const char *path, mode_t mode) {
(void) path, (void) mode;
return -1;
}
#endif // MG_ARCH == MG_ARCH_FREERTOS
#if MG_ARCH == MG_ARCH_NEWLIB
#define _POSIX_TIMERS
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#define MG_PATH_MAX 100
#define MG_ENABLE_SOCKET 0
#define MG_ENABLE_DIRLIST 0
#endif
#if MG_ARCH == MG_ARCH_RP2040
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <pico/stdlib.h>
int mkdir(const char *, mode_t);
#endif
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#if MG_ARCH == MG_ARCH_RTTHREAD
#include <rtthread.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#ifndef MG_IO_SIZE
#define MG_IO_SIZE 1460
#endif
#endif // MG_ARCH == MG_ARCH_RTTHREAD
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#if MG_ARCH == MG_ARCH_ARMCC || MG_ARCH == MG_ARCH_CMSIS_RTOS1 || \
MG_ARCH == MG_ARCH_CMSIS_RTOS2
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#if MG_ARCH == MG_ARCH_CMSIS_RTOS1
#include "cmsis_os.h" // keep this include
// https://developer.arm.com/documentation/ka003821/latest
extern uint32_t rt_time_get(void);
#elif MG_ARCH == MG_ARCH_CMSIS_RTOS2
#include "cmsis_os2.h" // keep this include
#endif
#define strdup(s) ((char *) mg_strdup(mg_str(s)).ptr)
#if defined(__ARMCC_VERSION)
#define mode_t size_t
#define mkdir(a, b) mg_mkdir(a, b)
static inline int mg_mkdir(const char *path, mode_t mode) {
(void) path, (void) mode;
return -1;
}
#endif
#if (MG_ARCH == MG_ARCH_CMSIS_RTOS1 || MG_ARCH == MG_ARCH_CMSIS_RTOS2) && \
!defined MG_ENABLE_RL && (!defined(MG_ENABLE_LWIP) || !MG_ENABLE_LWIP) && \
(!defined(MG_ENABLE_TCPIP) || !MG_ENABLE_TCPIP)
#define MG_ENABLE_RL 1
#endif
#endif
#if MG_ARCH == MG_ARCH_TIRTOS
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <serrno.h>
#include <sys/socket.h>
#include <ti/sysbios/knl/Clock.h>
#endif
#if MG_ARCH == MG_ARCH_UNIX
#define _DARWIN_UNLIMITED_SELECT 1 // No limit on file descriptors
#if defined(__APPLE__)
#include <mach/mach_time.h>
#endif
#if !defined(MG_ENABLE_EPOLL) && defined(__linux__)
#define MG_ENABLE_EPOLL 1
#elif !defined(MG_ENABLE_POLL)
#define MG_ENABLE_POLL 1
#endif
#include <arpa/inet.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(MG_ENABLE_EPOLL) && MG_ENABLE_EPOLL
#include <sys/epoll.h>
#elif defined(MG_ENABLE_POLL) && MG_ENABLE_POLL
#include <poll.h>
#else
#include <sys/select.h>
#endif
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#ifndef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 1
#endif
#ifndef MG_PATH_MAX
#define MG_PATH_MAX FILENAME_MAX
#endif
#endif
#if MG_ARCH == MG_ARCH_WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#endif
#include <ctype.h>
#include <direct.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#if defined(_MSC_VER) && _MSC_VER < 1700
#define __func__ ""
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
typedef unsigned char uint8_t;
typedef char int8_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef enum { false = 0, true = 1 } bool;
#else
#include <stdbool.h>
#include <stdint.h>
#include <ws2tcpip.h>
#endif
#include <process.h>
#include <winerror.h>
#include <winsock2.h>
// Protect from calls like std::snprintf in app code
// See https://github.com/cesanta/mongoose/issues/1047
#ifndef __cplusplus
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#ifndef strdup // For MSVC with _DEBUG, see #1359
#define strdup(x) _strdup(x)
#endif
#endif
#define MG_INVALID_SOCKET INVALID_SOCKET
#define MG_SOCKET_TYPE SOCKET
typedef unsigned long nfds_t;
#if defined(_MSC_VER)
#pragma comment(lib, "ws2_32.lib")
#ifndef alloca
#define alloca(a) _alloca(a)
#endif
#endif
#define poll(a, b, c) WSAPoll((a), (b), (c))
#define closesocket(x) closesocket(x)
typedef int socklen_t;
#define MG_DIRSEP '\\'
#ifndef MG_PATH_MAX
#define MG_PATH_MAX FILENAME_MAX
#endif
#ifndef SO_EXCLUSIVEADDRUSE
#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR))
#endif
#define MG_SOCK_ERR(errcode) ((errcode) < 0 ? WSAGetLastError() : 0)
#define MG_SOCK_PENDING(errcode) \
(((errcode) < 0) && \
(WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEINPROGRESS || \
WSAGetLastError() == WSAEWOULDBLOCK))
#define MG_SOCK_RESET(errcode) \
(((errcode) < 0) && (WSAGetLastError() == WSAECONNRESET))
#define realpath(a, b) _fullpath((b), (a), MG_PATH_MAX)
#define sleep(x) Sleep((x) *1000)
#define mkdir(a, b) _mkdir(a)
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#define timegm(x) _mkgmtime(x)
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#ifndef S_ISDIR
#define S_ISDIR(x) (((x) &_S_IFMT) == _S_IFDIR)
#endif
#ifndef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 1
#endif
#ifndef SIGPIPE
#define SIGPIPE 0
#endif
#endif
#if MG_ARCH == MG_ARCH_ZEPHYR
#include <zephyr/kernel.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <zephyr/net/socket.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#define MG_PUTCHAR(x) printk("%c", x)
#ifndef strdup
#define strdup(s) ((char *) mg_strdup(mg_str(s)).ptr)
#endif
#define strerror(x) zsock_gai_strerror(x)
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#ifndef FD_CLOEXEC
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#define FD_CLOEXEC 0
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#endif
#ifndef F_SETFD
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#define F_SETFD 0
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#endif
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#define MG_ENABLE_SSI 0
int rand(void);
int sscanf(const char *, const char *, ...);
#endif
#if defined(MG_ENABLE_FREERTOS_TCP) && MG_ENABLE_FREERTOS_TCP
#include <limits.h>
#include <list.h>
#include <FreeRTOS_IP.h>
#include <FreeRTOS_Sockets.h>
#include <FreeRTOS_errno_TCP.h> // contents to be moved and file removed, some day
#define MG_SOCKET_TYPE Socket_t
#define MG_INVALID_SOCKET FREERTOS_INVALID_SOCKET
// Why FreeRTOS-TCP did not implement a clean BSD API, but its own thing
// with FreeRTOS_ prefix, is beyond me
#define IPPROTO_TCP FREERTOS_IPPROTO_TCP
#define IPPROTO_UDP FREERTOS_IPPROTO_UDP
#define AF_INET FREERTOS_AF_INET
#define SOCK_STREAM FREERTOS_SOCK_STREAM
#define SOCK_DGRAM FREERTOS_SOCK_DGRAM
#define SO_BROADCAST 0
#define SO_ERROR 0
#define SOL_SOCKET 0
#define SO_REUSEADDR 0
#define MG_SOCK_ERR(errcode) ((errcode) < 0 ? (errcode) : 0)
#define MG_SOCK_PENDING(errcode) \
((errcode) == -pdFREERTOS_ERRNO_EWOULDBLOCK || \
(errcode) == -pdFREERTOS_ERRNO_EISCONN || \
(errcode) == -pdFREERTOS_ERRNO_EINPROGRESS || \
(errcode) == -pdFREERTOS_ERRNO_EAGAIN)
#define MG_SOCK_RESET(errcode) ((errcode) == -pdFREERTOS_ERRNO_ENOTCONN)
// actually only if optional timeout is enabled
#define MG_SOCK_INTR(fd) (fd == NULL)
#define sockaddr_in freertos_sockaddr
#define sockaddr freertos_sockaddr
#define accept(a, b, c) FreeRTOS_accept((a), (b), (c))
#define connect(a, b, c) FreeRTOS_connect((a), (b), (c))
#define bind(a, b, c) FreeRTOS_bind((a), (b), (c))
#define listen(a, b) FreeRTOS_listen((a), (b))
#define socket(a, b, c) FreeRTOS_socket((a), (b), (c))
#define send(a, b, c, d) FreeRTOS_send((a), (b), (c), (d))
#define recv(a, b, c, d) FreeRTOS_recv((a), (b), (c), (d))
#define setsockopt(a, b, c, d, e) FreeRTOS_setsockopt((a), (b), (c), (d), (e))
#define sendto(a, b, c, d, e, f) FreeRTOS_sendto((a), (b), (c), (d), (e), (f))
#define recvfrom(a, b, c, d, e, f) \
FreeRTOS_recvfrom((a), (b), (c), (d), (e), (f))
#define closesocket(x) FreeRTOS_closesocket(x)
#define gethostbyname(x) FreeRTOS_gethostbyname(x)
#define getsockname(a, b, c) mg_getsockname((a), (b), (c))
#define getpeername(a, b, c) mg_getpeername((a), (b), (c))
static inline int mg_getsockname(MG_SOCKET_TYPE fd, void *buf, socklen_t *len) {
(void) fd, (void) buf, (void) len;
return -1;
}
static inline int mg_getpeername(MG_SOCKET_TYPE fd, void *buf, socklen_t *len) {
(void) fd, (void) buf, (void) len;
return 0;
}
#endif
#if defined(MG_ENABLE_LWIP) && MG_ENABLE_LWIP
#if defined(__GNUC__) && !defined(__ARMCC_VERSION)
#include <sys/stat.h>
#endif
struct timeval;
#include <lwip/sockets.h>
#if !LWIP_TIMEVAL_PRIVATE
#if defined(__GNUC__) && !defined(__ARMCC_VERSION) // armclang sets both
#include <sys/time.h>
#else
struct timeval {
time_t tv_sec;
long tv_usec;
};
#endif
#endif
#if LWIP_SOCKET != 1
// Sockets support disabled in LWIP by default
#error Set LWIP_SOCKET variable to 1 (in lwipopts.h)
#endif
#endif
#if defined(MG_ENABLE_RL) && MG_ENABLE_RL
#include <rl_net.h>
#define closesocket(x) closesocket(x)
#define TCP_NODELAY SO_KEEPALIVE
#define MG_SOCK_ERR(errcode) ((errcode) < 0 ? (errcode) : 0)
#define MG_SOCK_PENDING(errcode) \
((errcode) == BSD_EWOULDBLOCK || (errcode) == BSD_EALREADY || \
(errcode) == BSD_EINPROGRESS)
#define MG_SOCK_RESET(errcode) \
((errcode) == BSD_ECONNABORTED || (errcode) == BSD_ECONNRESET)
// In blocking mode, which is enabled by default, accept() waits for a
// connection request. In non blocking mode, you must call accept()
// again if the error code BSD_EWOULDBLOCK is returned.
#define MG_SOCK_INTR(fd) (fd == BSD_EWOULDBLOCK)
#define socklen_t int
#endif
#ifndef MG_ENABLE_LOG
#define MG_ENABLE_LOG 1
#endif
#ifndef MG_ENABLE_CUSTOM_LOG
#define MG_ENABLE_CUSTOM_LOG 0 // Let user define their own MG_LOG
#endif
#ifndef MG_ENABLE_TCPIP
#define MG_ENABLE_TCPIP 0 // Mongoose built-in network stack
#endif
#ifndef MG_ENABLE_LWIP
#define MG_ENABLE_LWIP 0 // lWIP network stack
#endif
#ifndef MG_ENABLE_FREERTOS_TCP
#define MG_ENABLE_FREERTOS_TCP 0 // Amazon FreeRTOS-TCP network stack
#endif
#ifndef MG_ENABLE_RL
#define MG_ENABLE_RL 0 // ARM MDK network stack
#endif
#ifndef MG_ENABLE_SOCKET
#define MG_ENABLE_SOCKET !MG_ENABLE_TCPIP
#endif
#ifndef MG_ENABLE_POLL
#define MG_ENABLE_POLL 0
#endif
#ifndef MG_ENABLE_EPOLL
#define MG_ENABLE_EPOLL 0
#endif
#ifndef MG_ENABLE_FATFS
#define MG_ENABLE_FATFS 0
#endif
#ifndef MG_ENABLE_SSI
#define MG_ENABLE_SSI 0
#endif
#ifndef MG_ENABLE_IPV6
#define MG_ENABLE_IPV6 0
#endif
#ifndef MG_IPV6_V6ONLY
#define MG_IPV6_V6ONLY 0 // IPv6 socket binds only to V6, not V4 address
#endif
#ifndef MG_ENABLE_MD5
#define MG_ENABLE_MD5 1
#endif
// Set MG_ENABLE_WINSOCK=0 for Win32 builds with external IP stack (like LWIP)
#ifndef MG_ENABLE_WINSOCK
#define MG_ENABLE_WINSOCK 1
#endif
#ifndef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 0
#endif
#ifndef MG_ENABLE_CUSTOM_RANDOM
#define MG_ENABLE_CUSTOM_RANDOM 0
#endif
#ifndef MG_ENABLE_CUSTOM_MILLIS
#define MG_ENABLE_CUSTOM_MILLIS 0
#endif
#ifndef MG_ENABLE_PACKED_FS
#define MG_ENABLE_PACKED_FS 0
#endif
#ifndef MG_ENABLE_ASSERT
#define MG_ENABLE_ASSERT 0
#endif
#ifndef MG_IO_SIZE
#define MG_IO_SIZE 2048 // Granularity of the send/recv IO buffer growth
#endif
#ifndef MG_MAX_RECV_SIZE
#define MG_MAX_RECV_SIZE (3UL * 1024UL * 1024UL) // Maximum recv IO buffer size
#endif
#ifndef MG_DATA_SIZE
#define MG_DATA_SIZE 32 // struct mg_connection :: data size
#endif
#ifndef MG_MAX_HTTP_HEADERS
#define MG_MAX_HTTP_HEADERS 30
#endif
#ifndef MG_HTTP_INDEX
#define MG_HTTP_INDEX "index.html"
#endif
#ifndef MG_PATH_MAX
#ifdef PATH_MAX
#define MG_PATH_MAX PATH_MAX
#else
#define MG_PATH_MAX 128
#endif
#endif
#ifndef MG_SOCK_LISTEN_BACKLOG_SIZE
#define MG_SOCK_LISTEN_BACKLOG_SIZE 3
#endif
#ifndef MG_DIRSEP
#define MG_DIRSEP '/'
#endif
#ifndef MG_ENABLE_FILE
#if defined(FOPEN_MAX)
#define MG_ENABLE_FILE 1
#else
#define MG_ENABLE_FILE 0
#endif
#endif
#ifndef MG_INVALID_SOCKET
#define MG_INVALID_SOCKET (-1)
#endif
#ifndef MG_SOCKET_TYPE
#define MG_SOCKET_TYPE int
#endif
#ifndef MG_SOCKET_ERRNO
#define MG_SOCKET_ERRNO errno
#endif
#if MG_ENABLE_EPOLL
#define MG_EPOLL_ADD(c) \
do { \
struct epoll_event ev = {EPOLLIN | EPOLLERR | EPOLLHUP, {c}}; \
epoll_ctl(c->mgr->epoll_fd, EPOLL_CTL_ADD, (int) (size_t) c->fd, &ev); \
} while (0)
#define MG_EPOLL_MOD(c, wr) \
do { \
struct epoll_event ev = {EPOLLIN | EPOLLERR | EPOLLHUP, {c}}; \
if (wr) ev.events |= EPOLLOUT; \
epoll_ctl(c->mgr->epoll_fd, EPOLL_CTL_MOD, (int) (size_t) c->fd, &ev); \
} while (0)
#else
#define MG_EPOLL_ADD(c)
#define MG_EPOLL_MOD(c, wr)
#endif
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#ifndef MG_ENABLE_PROFILE
#define MG_ENABLE_PROFILE 0
#endif
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struct mg_str {
const char *ptr; // Pointer to string data
size_t len; // String len
};
#define MG_NULL_STR \
{ NULL, 0 }
#define MG_C_STR(a) \
{ (a), sizeof(a) - 1 }
// Using macro to avoid shadowing C++ struct constructor, see #1298
#define mg_str(s) mg_str_s(s)
struct mg_str mg_str(const char *s);
struct mg_str mg_str_n(const char *s, size_t n);
int mg_lower(const char *s);
int mg_ncasecmp(const char *s1, const char *s2, size_t len);
int mg_casecmp(const char *s1, const char *s2);
int mg_vcmp(const struct mg_str *s1, const char *s2);
int mg_vcasecmp(const struct mg_str *str1, const char *str2);
int mg_strcmp(const struct mg_str str1, const struct mg_str str2);
struct mg_str mg_strstrip(struct mg_str s);
struct mg_str mg_strdup(const struct mg_str s);
const char *mg_strstr(const struct mg_str haystack, const struct mg_str needle);
bool mg_match(struct mg_str str, struct mg_str pattern, struct mg_str *caps);
bool mg_globmatch(const char *pattern, size_t plen, const char *s, size_t n);
bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v);
bool mg_split(struct mg_str *s, struct mg_str *k, struct mg_str *v, char delim);
char *mg_hex(const void *buf, size_t len, char *dst);
void mg_unhex(const char *buf, size_t len, unsigned char *to);
unsigned long mg_unhexn(const char *s, size_t len);
bool mg_path_is_sane(const char *path);
// Single producer, single consumer non-blocking queue
struct mg_queue {
char *buf;
size_t size;
volatile size_t tail;
volatile size_t head;
};
void mg_queue_init(struct mg_queue *, char *, size_t); // Init queue
size_t mg_queue_book(struct mg_queue *, char **buf, size_t); // Reserve space
void mg_queue_add(struct mg_queue *, size_t); // Add new message
size_t mg_queue_next(struct mg_queue *, char **); // Get oldest message
void mg_queue_del(struct mg_queue *, size_t); // Delete oldest message
typedef void (*mg_pfn_t)(char, void *); // Output function
typedef size_t (*mg_pm_t)(mg_pfn_t, void *, va_list *); // %M printer
size_t mg_vxprintf(void (*)(char, void *), void *, const char *fmt, va_list *);
size_t mg_xprintf(void (*fn)(char, void *), void *, const char *fmt, ...);
// Convenience wrappers around mg_xprintf
size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap);
size_t mg_snprintf(char *, size_t, const char *fmt, ...);
char *mg_vmprintf(const char *fmt, va_list *ap);
char *mg_mprintf(const char *fmt, ...);
size_t mg_queue_vprintf(struct mg_queue *, const char *fmt, va_list *);
size_t mg_queue_printf(struct mg_queue *, const char *fmt, ...);
// %M print helper functions
size_t mg_print_base64(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_esc(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_hex(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_ip(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_ip_port(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_ip4(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_ip6(void (*out)(char, void *), void *arg, va_list *ap);
size_t mg_print_mac(void (*out)(char, void *), void *arg, va_list *ap);
// Various output functions
void mg_pfn_iobuf(char ch, void *param); // param: struct mg_iobuf *
void mg_pfn_stdout(char c, void *param); // param: ignored
// A helper macro for printing JSON: mg_snprintf(buf, len, "%m", MG_ESC("hi"))
#define MG_ESC(str) mg_print_esc, 0, (str)
enum { MG_LL_NONE, MG_LL_ERROR, MG_LL_INFO, MG_LL_DEBUG, MG_LL_VERBOSE };
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extern int mg_log_level; // Current log level, one of MG_LL_*
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void mg_log(const char *fmt, ...);
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void mg_log_prefix(int ll, const char *file, int line, const char *fname);
// bool mg_log2(int ll, const char *file, int line, const char *fmt, ...);
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void mg_hexdump(const void *buf, size_t len);
void mg_log_set_fn(mg_pfn_t fn, void *param);
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#define mg_log_set(level_) mg_log_level = (level_)
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#if MG_ENABLE_LOG
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#define MG_LOG(level, args) \
do { \
if ((level) <= mg_log_level) { \
mg_log_prefix((level), __FILE__, __LINE__, __func__); \
mg_log args; \
} \
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} while (0)
#else
#define MG_LOG(level, args) \
do { \
if (0) mg_log args; \
} while (0)
#endif
#define MG_ERROR(args) MG_LOG(MG_LL_ERROR, args)
#define MG_INFO(args) MG_LOG(MG_LL_INFO, args)
#define MG_DEBUG(args) MG_LOG(MG_LL_DEBUG, args)
#define MG_VERBOSE(args) MG_LOG(MG_LL_VERBOSE, args)
struct mg_timer {
unsigned long id; // Timer ID
uint64_t period_ms; // Timer period in milliseconds
uint64_t expire; // Expiration timestamp in milliseconds
unsigned flags; // Possible flags values below
#define MG_TIMER_ONCE 0 // Call function once
#define MG_TIMER_REPEAT 1 // Call function periodically
#define MG_TIMER_RUN_NOW 2 // Call immediately when timer is set
void (*fn)(void *); // Function to call
void *arg; // Function argument
struct mg_timer *next; // Linkage
};
void mg_timer_init(struct mg_timer **head, struct mg_timer *timer,
uint64_t milliseconds, unsigned flags, void (*fn)(void *),
void *arg);
void mg_timer_free(struct mg_timer **head, struct mg_timer *);
void mg_timer_poll(struct mg_timer **head, uint64_t new_ms);
bool mg_timer_expired(uint64_t *expiration, uint64_t period, uint64_t now);
enum { MG_FS_READ = 1, MG_FS_WRITE = 2, MG_FS_DIR = 4 };
// Filesystem API functions
// st() returns MG_FS_* flags and populates file size and modification time
// ls() calls fn() for every directory entry, allowing to list a directory
//
// NOTE: UNIX-style shorthand names for the API functions are deliberately
// chosen to avoid conflicts with some libraries that make macros for e.g.
// stat(), write(), read() calls.
struct mg_fs {
int (*st)(const char *path, size_t *size, time_t *mtime); // stat file
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void (*ls)(const char *path, void (*fn)(const char *, void *),
void *); // List directory entries: call fn(file_name, fn_data)
// for each directory entry
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void *(*op)(const char *path, int flags); // Open file
void (*cl)(void *fd); // Close file
size_t (*rd)(void *fd, void *buf, size_t len); // Read file
size_t (*wr)(void *fd, const void *buf, size_t len); // Write file
size_t (*sk)(void *fd, size_t offset); // Set file position
bool (*mv)(const char *from, const char *to); // Rename file
bool (*rm)(const char *path); // Delete file
bool (*mkd)(const char *path); // Create directory
};
extern struct mg_fs mg_fs_posix; // POSIX open/close/read/write/seek
extern struct mg_fs mg_fs_packed; // Packed FS, see examples/device-dashboard
extern struct mg_fs mg_fs_fat; // FAT FS
// File descriptor
struct mg_fd {
void *fd;
struct mg_fs *fs;
};
struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags);
void mg_fs_close(struct mg_fd *fd);
char *mg_file_read(struct mg_fs *fs, const char *path, size_t *size);
bool mg_file_write(struct mg_fs *fs, const char *path, const void *, size_t);
bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...);
// Packed API
const char *mg_unpack(const char *path, size_t *size, time_t *mtime);
const char *mg_unlist(size_t no); // Get no'th packed filename
struct mg_str mg_unpacked(const char *path); // Packed file as mg_str
#if MG_ENABLE_ASSERT
#include <assert.h>
#elif !defined(assert)
#define assert(x)
#endif
void mg_bzero(volatile unsigned char *buf, size_t len);
void mg_random(void *buf, size_t len);
char *mg_random_str(char *buf, size_t len);
uint16_t mg_ntohs(uint16_t net);
uint32_t mg_ntohl(uint32_t net);
uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len);
uint64_t mg_millis(void); // Return milliseconds since boot
uint64_t mg_now(void); // Return milliseconds since Epoch
#define mg_htons(x) mg_ntohs(x)
#define mg_htonl(x) mg_ntohl(x)
#define MG_U32(a, b, c, d) \
(((uint32_t) ((a) &255) << 24) | ((uint32_t) ((b) &255) << 16) | \
((uint32_t) ((c) &255) << 8) | (uint32_t) ((d) &255))
// For printing IPv4 addresses: printf("%d.%d.%d.%d\n", MG_IPADDR_PARTS(&ip))
#define MG_U8P(ADDR) ((uint8_t *) (ADDR))
#define MG_IPADDR_PARTS(ADDR) \
MG_U8P(ADDR)[0], MG_U8P(ADDR)[1], MG_U8P(ADDR)[2], MG_U8P(ADDR)[3]
#define MG_REG(x) ((volatile uint32_t *) (x))[0]
#define MG_BIT(x) (((uint32_t) 1U) << (x))
#define MG_SET_BITS(R, CLRMASK, SETMASK) (R) = ((R) & ~(CLRMASK)) | (SETMASK)
#define MG_ROUND_UP(x, a) ((a) == 0 ? (x) : ((((x) + (a) -1) / (a)) * (a)))
#define MG_ROUND_DOWN(x, a) ((a) == 0 ? (x) : (((x) / (a)) * (a)))
#ifdef __GNUC__
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#define MG_ARM_DISABLE_IRQ() asm volatile("cpsid i" : : : "memory")
#define MG_ARM_ENABLE_IRQ() asm volatile("cpsie i" : : : "memory")
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#else
#define MG_ARM_DISABLE_IRQ()
#define MG_ARM_ENABLE_IRQ()
#endif
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#if defined(__CC_ARM)
#define MG_DSB() __dsb(0xf)
#elif defined(__ARMCC_VERSION)
#define MG_DSB() __builtin_arm_dsb(0xf)
#elif defined(__GNUC__) && defined(__arm__) && defined(__thumb__)
#define MG_DSB() asm("DSB 0xf")
#elif defined(__ICCARM__)
#define MG_DSB() __iar_builtin_DSB()
#else
#define MG_DSB()
#endif
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struct mg_addr;
int mg_check_ip_acl(struct mg_str acl, struct mg_addr *remote_ip);
// Linked list management macros
#define LIST_ADD_HEAD(type_, head_, elem_) \
do { \
(elem_)->next = (*head_); \
*(head_) = (elem_); \
} while (0)
#define LIST_ADD_TAIL(type_, head_, elem_) \
do { \
type_ **h = head_; \
while (*h != NULL) h = &(*h)->next; \
*h = (elem_); \
} while (0)
#define LIST_DELETE(type_, head_, elem_) \
do { \
type_ **h = head_; \
while (*h != (elem_)) h = &(*h)->next; \
*h = (elem_)->next; \
} while (0)
unsigned short mg_url_port(const char *url);
int mg_url_is_ssl(const char *url);
struct mg_str mg_url_host(const char *url);
struct mg_str mg_url_user(const char *url);
struct mg_str mg_url_pass(const char *url);
const char *mg_url_uri(const char *url);
struct mg_iobuf {
unsigned char *buf; // Pointer to stored data
size_t size; // Total size available
size_t len; // Current number of bytes
size_t align; // Alignment during allocation
};
int mg_iobuf_init(struct mg_iobuf *, size_t, size_t);
int mg_iobuf_resize(struct mg_iobuf *, size_t);
void mg_iobuf_free(struct mg_iobuf *);
size_t mg_iobuf_add(struct mg_iobuf *, size_t, const void *, size_t);
size_t mg_iobuf_del(struct mg_iobuf *, size_t ofs, size_t len);
size_t mg_base64_update(unsigned char input_byte, char *buf, size_t len);
size_t mg_base64_final(char *buf, size_t len);
size_t mg_base64_encode(const unsigned char *p, size_t n, char *buf, size_t);
size_t mg_base64_decode(const char *src, size_t n, char *dst, size_t);
typedef struct {
uint32_t buf[4];
uint32_t bits[2];
unsigned char in[64];
} mg_md5_ctx;
void mg_md5_init(mg_md5_ctx *c);
void mg_md5_update(mg_md5_ctx *c, const unsigned char *data, size_t len);
void mg_md5_final(mg_md5_ctx *c, unsigned char[16]);
typedef struct {
uint32_t state[5];
uint32_t count[2];
unsigned char buffer[64];
} mg_sha1_ctx;
void mg_sha1_init(mg_sha1_ctx *);
void mg_sha1_update(mg_sha1_ctx *, const unsigned char *data, size_t len);
void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *);
struct mg_connection;
typedef void (*mg_event_handler_t)(struct mg_connection *, int ev,
void *ev_data, void *fn_data);
void mg_call(struct mg_connection *c, int ev, void *ev_data);
void mg_error(struct mg_connection *c, const char *fmt, ...);
enum {
MG_EV_ERROR, // Error char *error_message
MG_EV_OPEN, // Connection created NULL
MG_EV_POLL, // mg_mgr_poll iteration uint64_t *uptime_millis
MG_EV_RESOLVE, // Host name is resolved NULL
MG_EV_CONNECT, // Connection established NULL
MG_EV_ACCEPT, // Connection accepted NULL
MG_EV_TLS_HS, // TLS handshake succeeded NULL
MG_EV_READ, // Data received from socket long *bytes_read
MG_EV_WRITE, // Data written to socket long *bytes_written
MG_EV_CLOSE, // Connection closed NULL
MG_EV_HTTP_MSG, // HTTP request/response struct mg_http_message *
MG_EV_WS_OPEN, // Websocket handshake done struct mg_http_message *
MG_EV_WS_MSG, // Websocket msg, text or bin struct mg_ws_message *
MG_EV_WS_CTL, // Websocket control msg struct mg_ws_message *
MG_EV_MQTT_CMD, // MQTT low-level command struct mg_mqtt_message *
MG_EV_MQTT_MSG, // MQTT PUBLISH received struct mg_mqtt_message *
MG_EV_MQTT_OPEN, // MQTT CONNACK received int *connack_status_code
MG_EV_SNTP_TIME, // SNTP time received uint64_t *epoch_millis
MG_EV_USER // Starting ID for user events
};
struct mg_dns {
const char *url; // DNS server URL
struct mg_connection *c; // DNS server connection
};
struct mg_addr {
uint8_t ip[16]; // Holds IPv4 or IPv6 address, in network byte order
uint16_t port; // TCP or UDP port in network byte order
uint8_t scope_id; // IPv6 scope ID
bool is_ip6; // True when address is IPv6 address
};
struct mg_mgr {
struct mg_connection *conns; // List of active connections
struct mg_dns dns4; // DNS for IPv4
struct mg_dns dns6; // DNS for IPv6
int dnstimeout; // DNS resolve timeout in milliseconds
bool use_dns6; // Use DNS6 server by default, see #1532
unsigned long nextid; // Next connection ID
unsigned long timerid; // Next timer ID
void *userdata; // Arbitrary user data pointer
void *tls_ctx; // TLS context shared by all TLS sessions
uint16_t mqtt_id; // MQTT IDs for pub/sub
void *active_dns_requests; // DNS requests in progress
struct mg_timer *timers; // Active timers
int epoll_fd; // Used when MG_EPOLL_ENABLE=1
void *priv; // Used by the MIP stack
size_t extraconnsize; // Used by the MIP stack
#if MG_ENABLE_FREERTOS_TCP
SocketSet_t ss; // NOTE(lsm): referenced from socket struct
#endif
};
struct mg_connection {
struct mg_connection *next; // Linkage in struct mg_mgr :: connections
struct mg_mgr *mgr; // Our container
struct mg_addr loc; // Local address
struct mg_addr rem; // Remote address
void *fd; // Connected socket, or LWIP data
unsigned long id; // Auto-incrementing unique connection ID
struct mg_iobuf recv; // Incoming data
struct mg_iobuf send; // Outgoing data
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struct mg_iobuf prof; // Profile data enabled by MG_ENABLE_PROFILE
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struct mg_iobuf rtls; // TLS only. Incoming encrypted data
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mg_event_handler_t fn; // User-specified event handler function
void *fn_data; // User-specified function parameter
mg_event_handler_t pfn; // Protocol-specific handler function
void *pfn_data; // Protocol-specific function parameter
char data[MG_DATA_SIZE]; // Arbitrary connection data
void *tls; // TLS specific data
unsigned is_listening : 1; // Listening connection
unsigned is_client : 1; // Outbound (client) connection
unsigned is_accepted : 1; // Accepted (server) connection
unsigned is_resolving : 1; // Non-blocking DNS resolution is in progress
unsigned is_arplooking : 1; // Non-blocking ARP resolution is in progress
unsigned is_connecting : 1; // Non-blocking connect is in progress
unsigned is_tls : 1; // TLS-enabled connection
unsigned is_tls_hs : 1; // TLS handshake is in progress
unsigned is_udp : 1; // UDP connection
unsigned is_websocket : 1; // WebSocket connection
unsigned is_mqtt5 : 1; // For MQTT connection, v5 indicator
unsigned is_hexdumping : 1; // Hexdump in/out traffic
unsigned is_draining : 1; // Send remaining data, then close and free
unsigned is_closing : 1; // Close and free the connection immediately
unsigned is_full : 1; // Stop reads, until cleared
unsigned is_resp : 1; // Response is still being generated
unsigned is_readable : 1; // Connection is ready to read
unsigned is_writable : 1; // Connection is ready to write
};
void mg_mgr_poll(struct mg_mgr *, int ms);
void mg_mgr_init(struct mg_mgr *);
void mg_mgr_free(struct mg_mgr *);
struct mg_connection *mg_listen(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_wrapfd(struct mg_mgr *mgr, int fd,
mg_event_handler_t fn, void *fn_data);
void mg_connect_resolved(struct mg_connection *);
bool mg_send(struct mg_connection *, const void *, size_t);
size_t mg_printf(struct mg_connection *, const char *fmt, ...);
size_t mg_vprintf(struct mg_connection *, const char *fmt, va_list *ap);
bool mg_aton(struct mg_str str, struct mg_addr *addr);
// These functions are used to integrate with custom network stacks
struct mg_connection *mg_alloc_conn(struct mg_mgr *);
void mg_close_conn(struct mg_connection *c);
bool mg_open_listener(struct mg_connection *c, const char *url);
// Utility functions
struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds,
unsigned flags, void (*fn)(void *), void *arg);
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// Macros to record timestamped events that happens with a connection.
// They are saved into a c->prof IO buffer, each event is a name and a 32-bit
// timestamp in milliseconds since connection init time.
//
// Test (run in two separate terminals):
// make -C examples/http-server/ CFLAGS_EXTRA=-DMG_ENABLE_PROFILE=1
// curl localhost:8000
// Output:
// 1ea1f1e7 2 net.c:150:mg_close_conn 3 profile:
// 1ea1f1e8 2 net.c:150:mg_close_conn 1ea1f1e6 init
// 1ea1f1e8 2 net.c:150:mg_close_conn 0 EV_OPEN
// 1ea1f1e8 2 net.c:150:mg_close_conn 0 EV_ACCEPT
// 1ea1f1e8 2 net.c:150:mg_close_conn 0 EV_READ
// 1ea1f1e8 2 net.c:150:mg_close_conn 0 EV_HTTP_MSG
// 1ea1f1e8 2 net.c:150:mg_close_conn 0 EV_WRITE
// 1ea1f1e8 2 net.c:150:mg_close_conn 1 EV_CLOSE
//
// Usage:
// Enable profiling by setting MG_ENABLE_PROFILE=1
// Invoke MG_PROF_ADD(c, "MY_EVENT_1") in the places you'd like to measure
#if MG_ENABLE_PROFILE
struct mg_profitem {
const char *name; // Event name
uint32_t timestamp; // Milliseconds since connection creation (MG_EV_OPEN)
};
#define MG_PROFILE_ALLOC_GRANULARITY 256 // Can save 32 items wih to realloc
// Adding a profile item to the c->prof. Must be as fast as possible.
// Reallocation of the c->prof iobuf is not desirable here, that's why we
// pre-allocate c->prof with MG_PROFILE_ALLOC_GRANULARITY.
// This macro just inits and copies 8 bytes, and calls mg_millis(),
// which should be fast enough.
#define MG_PROF_ADD(c, name_) \
do { \
struct mg_iobuf *io = &c->prof; \
uint32_t inittime = ((struct mg_profitem *) io->buf)->timestamp; \
struct mg_profitem item = {name_, (uint32_t) mg_millis() - inittime}; \
mg_iobuf_add(io, io->len, &item, sizeof(item)); \
} while (0)
// Initialising profile for a new connection. Not time sensitive
#define MG_PROF_INIT(c) \
do { \
struct mg_profitem first = {"init", (uint32_t) mg_millis()}; \
mg_iobuf_init(&(c)->prof, 0, MG_PROFILE_ALLOC_GRANULARITY); \
mg_iobuf_add(&c->prof, c->prof.len, &first, sizeof(first)); \
} while (0)
#define MG_PROF_FREE(c) mg_iobuf_free(&(c)->prof)
// Dumping the profile. Not time sensitive
#define MG_PROF_DUMP(c) \
do { \
struct mg_iobuf *io = &c->prof; \
struct mg_profitem *p = (struct mg_profitem *) io->buf; \
struct mg_profitem *e = &p[io->len / sizeof(*p)]; \
MG_INFO(("%lu profile:", c->id)); \
while (p < e) { \
MG_INFO(("%5lx %s", (unsigned long) p->timestamp, p->name)); \
p++; \
} \
} while (0)
#else
#define MG_PROF_INIT(c)
#define MG_PROF_FREE(c)
#define MG_PROF_ADD(c, name)
#define MG_PROF_DUMP(c)
#endif
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struct mg_http_header {
struct mg_str name; // Header name
struct mg_str value; // Header value
};
struct mg_http_message {
struct mg_str method, uri, query, proto; // Request/response line
struct mg_http_header headers[MG_MAX_HTTP_HEADERS]; // Headers
struct mg_str body; // Body
struct mg_str head; // Request + headers
struct mg_str message; // Request + headers + body
};
// Parameter for mg_http_serve_dir()
struct mg_http_serve_opts {
const char *root_dir; // Web root directory, must be non-NULL
const char *ssi_pattern; // SSI file name pattern, e.g. #.shtml
const char *extra_headers; // Extra HTTP headers to add in responses
const char *mime_types; // Extra mime types, ext1=type1,ext2=type2,..
const char *page404; // Path to the 404 page, or NULL by default
struct mg_fs *fs; // Filesystem implementation. Use NULL for POSIX
};
// Parameter for mg_http_next_multipart
struct mg_http_part {
struct mg_str name; // Form field name
struct mg_str filename; // Filename for file uploads
struct mg_str body; // Part contents
};
int mg_http_parse(const char *s, size_t len, struct mg_http_message *);
int mg_http_get_request_len(const unsigned char *buf, size_t buf_len);
void mg_http_printf_chunk(struct mg_connection *cnn, const char *fmt, ...);
void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm);
struct mg_connection *mg_http_listen(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_http_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
const struct mg_http_serve_opts *);
void mg_http_serve_file(struct mg_connection *, struct mg_http_message *hm,
const char *path, const struct mg_http_serve_opts *);
void mg_http_reply(struct mg_connection *, int status_code, const char *headers,
const char *body_fmt, ...);
struct mg_str *mg_http_get_header(struct mg_http_message *, const char *name);
struct mg_str mg_http_var(struct mg_str buf, struct mg_str name);
int mg_http_get_var(const struct mg_str *, const char *name, char *, size_t);
int mg_url_decode(const char *s, size_t n, char *to, size_t to_len, int form);
size_t mg_url_encode(const char *s, size_t n, char *buf, size_t len);
void mg_http_creds(struct mg_http_message *, char *, size_t, char *, size_t);
bool mg_http_match_uri(const struct mg_http_message *, const char *glob);
long mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
struct mg_fs *fs, const char *path, size_t max_size);
void mg_http_bauth(struct mg_connection *, const char *user, const char *pass);
struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v);
size_t mg_http_next_multipart(struct mg_str, size_t, struct mg_http_part *);
int mg_http_status(const struct mg_http_message *hm);
void mg_hello(const char *url);
void mg_http_serve_ssi(struct mg_connection *c, const char *root,
const char *fullpath);
#define MG_TLS_NONE 0 // No TLS support
#define MG_TLS_MBED 1 // mbedTLS
#define MG_TLS_OPENSSL 2 // OpenSSL
#define MG_TLS_BUILTIN 3 // Built-in
#define MG_TLS_CUSTOM 4 // Custom implementation
#ifndef MG_TLS
#define MG_TLS MG_TLS_NONE
#endif
struct mg_tls_opts {
struct mg_str ca; // PEM or DER
struct mg_str cert; // PEM or DER
struct mg_str key; // PEM or DER
struct mg_str name; // If not empty, enable host name verification
};
void mg_tls_init(struct mg_connection *, const struct mg_tls_opts *opts);
void mg_tls_free(struct mg_connection *);
long mg_tls_send(struct mg_connection *, const void *buf, size_t len);
long mg_tls_recv(struct mg_connection *, void *buf, size_t len);
size_t mg_tls_pending(struct mg_connection *);
void mg_tls_handshake(struct mg_connection *);
// Private
void mg_tls_ctx_init(struct mg_mgr *);
void mg_tls_ctx_free(struct mg_mgr *);
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// Low-level IO primives used by TLS layer
enum { MG_IO_ERR = -1, MG_IO_WAIT = -2, MG_IO_RESET = -3 };
long mg_io_send(struct mg_connection *c, const void *buf, size_t len);
long mg_io_recv(struct mg_connection *c, void *buf, size_t len);
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#if MG_TLS == MG_TLS_MBED
#include <mbedtls/debug.h>
#include <mbedtls/net_sockets.h>
#include <mbedtls/ssl.h>
#include <mbedtls/ssl_ticket.h>
struct mg_tls_ctx {
int dummy;
#ifdef MBEDTLS_SSL_SESSION_TICKETS
mbedtls_ssl_ticket_context tickets;
#endif
};
struct mg_tls {
mbedtls_x509_crt ca; // Parsed CA certificate
mbedtls_x509_crt cert; // Parsed certificate
mbedtls_pk_context pk; // Private key context
mbedtls_ssl_context ssl; // SSL/TLS context
mbedtls_ssl_config conf; // SSL-TLS config
#ifdef MBEDTLS_SSL_SESSION_TICKETS
mbedtls_ssl_ticket_context ticket; // Session tickets context
#endif
};
#endif
#if MG_TLS == MG_TLS_OPENSSL
#include <openssl/err.h>
#include <openssl/ssl.h>
struct mg_tls {
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BIO_METHOD *bm;
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SSL_CTX *ctx;
SSL *ssl;
};
#endif
#define WEBSOCKET_OP_CONTINUE 0
#define WEBSOCKET_OP_TEXT 1
#define WEBSOCKET_OP_BINARY 2
#define WEBSOCKET_OP_CLOSE 8
#define WEBSOCKET_OP_PING 9
#define WEBSOCKET_OP_PONG 10
struct mg_ws_message {
struct mg_str data; // Websocket message data
uint8_t flags; // Websocket message flags
};
struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data,
const char *fmt, ...);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
const char *fmt, ...);
size_t mg_ws_send(struct mg_connection *, const void *buf, size_t len, int op);
size_t mg_ws_wrap(struct mg_connection *, size_t len, int op);
size_t mg_ws_printf(struct mg_connection *c, int op, const char *fmt, ...);
size_t mg_ws_vprintf(struct mg_connection *c, int op, const char *fmt,
va_list *);
struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data);
void mg_sntp_request(struct mg_connection *c);
int64_t mg_sntp_parse(const unsigned char *buf, size_t len);
#define MQTT_CMD_CONNECT 1
#define MQTT_CMD_CONNACK 2
#define MQTT_CMD_PUBLISH 3
#define MQTT_CMD_PUBACK 4
#define MQTT_CMD_PUBREC 5
#define MQTT_CMD_PUBREL 6
#define MQTT_CMD_PUBCOMP 7
#define MQTT_CMD_SUBSCRIBE 8
#define MQTT_CMD_SUBACK 9
#define MQTT_CMD_UNSUBSCRIBE 10
#define MQTT_CMD_UNSUBACK 11
#define MQTT_CMD_PINGREQ 12
#define MQTT_CMD_PINGRESP 13
#define MQTT_CMD_DISCONNECT 14
#define MQTT_CMD_AUTH 15
#define MQTT_PROP_PAYLOAD_FORMAT_INDICATOR 0x01
#define MQTT_PROP_MESSAGE_EXPIRY_INTERVAL 0x02
#define MQTT_PROP_CONTENT_TYPE 0x03
#define MQTT_PROP_RESPONSE_TOPIC 0x08
#define MQTT_PROP_CORRELATION_DATA 0x09
#define MQTT_PROP_SUBSCRIPTION_IDENTIFIER 0x0B
#define MQTT_PROP_SESSION_EXPIRY_INTERVAL 0x11
#define MQTT_PROP_ASSIGNED_CLIENT_IDENTIFIER 0x12
#define MQTT_PROP_SERVER_KEEP_ALIVE 0x13
#define MQTT_PROP_AUTHENTICATION_METHOD 0x15
#define MQTT_PROP_AUTHENTICATION_DATA 0x16
#define MQTT_PROP_REQUEST_PROBLEM_INFORMATION 0x17
#define MQTT_PROP_WILL_DELAY_INTERVAL 0x18
#define MQTT_PROP_REQUEST_RESPONSE_INFORMATION 0x19
#define MQTT_PROP_RESPONSE_INFORMATION 0x1A
#define MQTT_PROP_SERVER_REFERENCE 0x1C
#define MQTT_PROP_REASON_STRING 0x1F
#define MQTT_PROP_RECEIVE_MAXIMUM 0x21
#define MQTT_PROP_TOPIC_ALIAS_MAXIMUM 0x22
#define MQTT_PROP_TOPIC_ALIAS 0x23
#define MQTT_PROP_MAXIMUM_QOS 0x24
#define MQTT_PROP_RETAIN_AVAILABLE 0x25
#define MQTT_PROP_USER_PROPERTY 0x26
#define MQTT_PROP_MAXIMUM_PACKET_SIZE 0x27
#define MQTT_PROP_WILDCARD_SUBSCRIPTION_AVAILABLE 0x28
#define MQTT_PROP_SUBSCRIPTION_IDENTIFIER_AVAILABLE 0x29
#define MQTT_PROP_SHARED_SUBSCRIPTION_AVAILABLE 0x2A
enum {
MQTT_PROP_TYPE_BYTE,
MQTT_PROP_TYPE_STRING,
MQTT_PROP_TYPE_STRING_PAIR,
MQTT_PROP_TYPE_BINARY_DATA,
MQTT_PROP_TYPE_VARIABLE_INT,
MQTT_PROP_TYPE_INT,
MQTT_PROP_TYPE_SHORT
};
enum { MQTT_OK, MQTT_INCOMPLETE, MQTT_MALFORMED };
struct mg_mqtt_prop {
uint8_t id; // Enumerated at MQTT5 Reference
uint32_t iv; // Integer value for 8-, 16-, 32-bit integers types
struct mg_str key; // Non-NULL only for user property type
struct mg_str val; // Non-NULL only for UTF-8 types and user properties
};
struct mg_mqtt_opts {
struct mg_str user; // Username, can be empty
struct mg_str pass; // Password, can be empty
struct mg_str client_id; // Client ID
struct mg_str topic; // message/subscription topic
struct mg_str message; // message content
uint8_t qos; // message quality of service
uint8_t version; // Can be 4 (3.1.1), or 5. If 0, assume 4
uint16_t keepalive; // Keep-alive timer in seconds
bool retain; // Retain flag
bool clean; // Clean session flag
struct mg_mqtt_prop *props; // MQTT5 props array
size_t num_props; // number of props
struct mg_mqtt_prop *will_props; // Valid only for CONNECT packet (MQTT5)
size_t num_will_props; // Number of will props
};
struct mg_mqtt_message {
struct mg_str topic; // Parsed topic for PUBLISH
struct mg_str data; // Parsed message for PUBLISH
struct mg_str dgram; // Whole MQTT packet, including headers
uint16_t id; // For PUBACK, PUBREC, PUBREL, PUBCOMP, SUBACK, PUBLISH
uint8_t cmd; // MQTT command, one of MQTT_CMD_*
uint8_t qos; // Quality of service
uint8_t ack; // CONNACK return code, 0 = success
size_t props_start; // Offset to the start of the properties (MQTT5)
size_t props_size; // Length of the properties
};
struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
const struct mg_mqtt_opts *opts,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data);
void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts);
void mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
void mg_mqtt_sub(struct mg_connection *, const struct mg_mqtt_opts *opts);
int mg_mqtt_parse(const uint8_t *, size_t, uint8_t, struct mg_mqtt_message *);
void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
uint32_t len);
void mg_mqtt_ping(struct mg_connection *);
void mg_mqtt_pong(struct mg_connection *);
void mg_mqtt_disconnect(struct mg_connection *, const struct mg_mqtt_opts *);
size_t mg_mqtt_next_prop(struct mg_mqtt_message *, struct mg_mqtt_prop *,
size_t ofs);
// Mongoose sends DNS queries that contain only one question:
// either A (IPv4) or AAAA (IPv6) address lookup.
// Therefore, we expect zero or one answer.
// If `resolved` is true, then `addr` contains resolved IPv4 or IPV6 address.
struct mg_dns_message {
uint16_t txnid; // Transaction ID
bool resolved; // Resolve successful, addr is set
struct mg_addr addr; // Resolved address
char name[256]; // Host name
};
struct mg_dns_header {
uint16_t txnid; // Transaction ID
uint16_t flags;
uint16_t num_questions;
uint16_t num_answers;
uint16_t num_authority_prs;
uint16_t num_other_prs;
};
// DNS resource record
struct mg_dns_rr {
uint16_t nlen; // Name or pointer length
uint16_t atype; // Address type
uint16_t aclass; // Address class
uint16_t alen; // Address length
};
void mg_resolve(struct mg_connection *, const char *url);
void mg_resolve_cancel(struct mg_connection *);
bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
bool is_question, struct mg_dns_rr *);
#ifndef MG_JSON_MAX_DEPTH
#define MG_JSON_MAX_DEPTH 30
#endif
// Error return values - negative. Successful returns are >= 0
enum { MG_JSON_TOO_DEEP = -1, MG_JSON_INVALID = -2, MG_JSON_NOT_FOUND = -3 };
int mg_json_get(struct mg_str json, const char *path, int *toklen);
bool mg_json_get_num(struct mg_str json, const char *path, double *v);
bool mg_json_get_bool(struct mg_str json, const char *path, bool *v);
long mg_json_get_long(struct mg_str json, const char *path, long dflt);
char *mg_json_get_str(struct mg_str json, const char *path);
char *mg_json_get_hex(struct mg_str json, const char *path, int *len);
char *mg_json_get_b64(struct mg_str json, const char *path, int *len);
bool mg_json_unescape(struct mg_str str, char *buf, size_t len);
size_t mg_json_next(struct mg_str obj, size_t ofs, struct mg_str *key,
struct mg_str *val);
// JSON-RPC request descriptor
struct mg_rpc_req {
struct mg_rpc **head; // RPC handlers list head
struct mg_rpc *rpc; // RPC handler being called
mg_pfn_t pfn; // Response printing function
void *pfn_data; // Response printing function data
void *req_data; // Arbitrary request data
struct mg_str frame; // Request, e.g. {"id":1,"method":"add","params":[1,2]}
};
// JSON-RPC method handler
struct mg_rpc {
struct mg_rpc *next; // Next in list
struct mg_str method; // Method pattern
void (*fn)(struct mg_rpc_req *); // Handler function
void *fn_data; // Handler function argument
};
void mg_rpc_add(struct mg_rpc **head, struct mg_str method_pattern,
void (*handler)(struct mg_rpc_req *), void *handler_data);
void mg_rpc_del(struct mg_rpc **head, void (*handler)(struct mg_rpc_req *));
void mg_rpc_process(struct mg_rpc_req *);
// Helper functions to print result or error frame
void mg_rpc_ok(struct mg_rpc_req *, const char *fmt, ...);
void mg_rpc_vok(struct mg_rpc_req *, const char *fmt, va_list *ap);
void mg_rpc_err(struct mg_rpc_req *, int code, const char *fmt, ...);
void mg_rpc_verr(struct mg_rpc_req *, int code, const char *fmt, va_list *);
void mg_rpc_list(struct mg_rpc_req *r);
// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
#define MG_OTA_NONE 0 // No OTA support
#define MG_OTA_FLASH 1 // OTA via an internal flash
#define MG_OTA_CUSTOM 100 // Custom implementation
#ifndef MG_OTA
#define MG_OTA MG_OTA_NONE
#endif
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#if defined(__GNUC__) && !defined(__APPLE__)
#define MG_IRAM __attribute__((section(".iram")))
#else
#define MG_IRAM
#endif
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// Firmware update API
bool mg_ota_begin(size_t new_firmware_size); // Start writing
bool mg_ota_write(const void *buf, size_t len); // Write chunk, aligned to 1k
bool mg_ota_end(void); // Stop writing
enum {
MG_OTA_UNAVAILABLE = 0, // No OTA information is present
MG_OTA_FIRST_BOOT = 1, // Device booting the first time after the OTA
MG_OTA_UNCOMMITTED = 2, // Ditto, but marking us for the rollback
MG_OTA_COMMITTED = 3, // The firmware is good
};
enum { MG_FIRMWARE_CURRENT = 0, MG_FIRMWARE_PREVIOUS = 1 };
int mg_ota_status(int firmware); // Return firmware status MG_OTA_*
uint32_t mg_ota_crc32(int firmware); // Return firmware checksum
uint32_t mg_ota_timestamp(int firmware); // Firmware timestamp, UNIX UTC epoch
size_t mg_ota_size(int firmware); // Firmware size
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bool mg_ota_commit(void); // Commit current firmware
bool mg_ota_rollback(void); // Rollback to the previous firmware
MG_IRAM void mg_ota_boot(void); // Bootloader function
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// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
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#define MG_DEVICE_NONE 0 // Dummy system
#define MG_DEVICE_STM32H5 1 // STM32 H5
#define MG_DEVICE_STM32H7 2 // STM32 H7
#define MG_DEVICE_CH32V307 100 // WCH CH32V307
#define MG_DEVICE_CUSTOM 1000 // Custom implementation
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#ifndef MG_DEVICE
#define MG_DEVICE MG_DEVICE_NONE
#endif
// Flash information
void *mg_flash_start(void); // Return flash start address
size_t mg_flash_size(void); // Return flash size
size_t mg_flash_sector_size(void); // Return flash sector size
size_t mg_flash_write_align(void); // Return flash write align, minimum 4
int mg_flash_bank(void); // 0: not dual bank, 1: bank1, 2: bank2
// Write, erase, swap bank
bool mg_flash_write(void *addr, const void *buf, size_t len);
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bool mg_flash_erase(void *sector);
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bool mg_flash_swap_bank(void);
// Convenience functions to store data on a flash sector with wear levelling
// If `sector` is NULL, then the last sector of flash is used
bool mg_flash_load(void *sector, uint32_t key, void *buf, size_t len);
bool mg_flash_save(void *sector, uint32_t key, const void *buf, size_t len);
void mg_device_reset(void); // Reboot device immediately
#if defined(MG_ENABLE_TCPIP) && MG_ENABLE_TCPIP
struct mg_tcpip_if; // Mongoose TCP/IP network interface
struct mg_tcpip_driver {
bool (*init)(struct mg_tcpip_if *); // Init driver
size_t (*tx)(const void *, size_t, struct mg_tcpip_if *); // Transmit frame
size_t (*rx)(void *buf, size_t len, struct mg_tcpip_if *); // Receive frame
bool (*up)(struct mg_tcpip_if *); // Up/down status
};
// Network interface
struct mg_tcpip_if {
uint8_t mac[6]; // MAC address. Must be set to a valid MAC
uint32_t ip, mask, gw; // IP address, mask, default gateway
struct mg_str tx; // Output (TX) buffer
bool enable_dhcp_client; // Enable DCHP client
bool enable_dhcp_server; // Enable DCHP server
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bool enable_get_gateway; // DCHP server sets client as gateway
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bool enable_crc32_check; // Do a CRC check on RX frames and strip it
bool enable_mac_check; // Do a MAC check on RX frames
struct mg_tcpip_driver *driver; // Low level driver
void *driver_data; // Driver-specific data
struct mg_mgr *mgr; // Mongoose event manager
struct mg_queue recv_queue; // Receive queue
uint16_t mtu; // Interface MTU
#define MG_TCPIP_MTU_DEFAULT 1500
// Internal state, user can use it but should not change it
uint8_t gwmac[6]; // Router's MAC
uint64_t now; // Current time
uint64_t timer_1000ms; // 1000 ms timer: for DHCP and link state
uint64_t lease_expire; // Lease expiration time, in ms
uint16_t eport; // Next ephemeral port
volatile uint32_t ndrop; // Number of received, but dropped frames
volatile uint32_t nrecv; // Number of received frames
volatile uint32_t nsent; // Number of transmitted frames
volatile uint32_t nerr; // Number of driver errors
uint8_t state; // Current state
#define MG_TCPIP_STATE_DOWN 0 // Interface is down
#define MG_TCPIP_STATE_UP 1 // Interface is up
#define MG_TCPIP_STATE_REQ 2 // Interface is up and has requested an IP
#define MG_TCPIP_STATE_READY 3 // Interface is up and has an IP assigned
};
void mg_tcpip_init(struct mg_mgr *, struct mg_tcpip_if *);
void mg_tcpip_free(struct mg_tcpip_if *);
void mg_tcpip_qwrite(void *buf, size_t len, struct mg_tcpip_if *ifp);
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extern struct mg_tcpip_driver mg_tcpip_driver_stm32f;
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extern struct mg_tcpip_driver mg_tcpip_driver_w5500;
extern struct mg_tcpip_driver mg_tcpip_driver_tm4c;
extern struct mg_tcpip_driver mg_tcpip_driver_stm32h;
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extern struct mg_tcpip_driver mg_tcpip_driver_imxrt;
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extern struct mg_tcpip_driver mg_tcpip_driver_same54;
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extern struct mg_tcpip_driver mg_tcpip_driver_cmsis;
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// Drivers that require SPI, can use this SPI abstraction
struct mg_tcpip_spi {
void *spi; // Opaque SPI bus descriptor
void (*begin)(void *); // SPI begin: slave select low
void (*end)(void *); // SPI end: slave select high
uint8_t (*txn)(void *, uint8_t); // SPI transaction: write 1 byte, read reply
};
#endif
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#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_CMSIS) && MG_ENABLE_DRIVER_CMSIS
#include "Driver_ETH_MAC.h" // keep this include
#include "Driver_ETH_PHY.h" // keep this include
#endif
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struct mg_tcpip_driver_imxrt_data {
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// MDC clock divider. MDC clock is derived from IPS Bus clock (ipg_clk),
// must not exceed 2.5MHz. Configuration for clock range 2.36~2.50 MHz
// 37.5.1.8.2, Table 37-46 : f = ipg_clk / (2(mdc_cr + 1))
// ipg_clk mdc_cr VALUE
// --------------------------
// -1 <-- TODO() tell driver to guess the value
// 25 MHz 4
// 33 MHz 6
// 40 MHz 7
// 50 MHz 9
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// 66 MHz 13
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int mdc_cr; // Valid values: -1 to 63
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uint8_t phy_addr; // PHY address
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};
struct mg_tcpip_driver_same54_data {
int mdc_cr;
};
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struct mg_tcpip_driver_stm32f_data {
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// MDC clock divider. MDC clock is derived from HCLK, must not exceed 2.5MHz
// HCLK range DIVIDER mdc_cr VALUE
// -------------------------------------
// -1 <-- tell driver to guess the value
// 60-100 MHz HCLK/42 0
// 100-150 MHz HCLK/62 1
// 20-35 MHz HCLK/16 2
// 35-60 MHz HCLK/26 3
// 150-216 MHz HCLK/102 4 <-- value for Nucleo-F* on max speed
// 216-310 MHz HCLK/124 5
// 110, 111 Reserved
int mdc_cr; // Valid values: -1, 0, 1, 2, 3, 4, 5
};
struct mg_tcpip_driver_stm32h_data {
// MDC clock divider. MDC clock is derived from HCLK, must not exceed 2.5MHz
// HCLK range DIVIDER mdc_cr VALUE
// -------------------------------------
// -1 <-- tell driver to guess the value
// 60-100 MHz HCLK/42 0
// 100-150 MHz HCLK/62 1
// 20-35 MHz HCLK/16 2
// 35-60 MHz HCLK/26 3
// 150-250 MHz HCLK/102 4 <-- value for Nucleo-H* on max speed driven by HSI
// 250-300 MHz HCLK/124 5 <-- value for Nucleo-H* on max speed driven by CSI
// 110, 111 Reserved
int mdc_cr; // Valid values: -1, 0, 1, 2, 3, 4, 5
};
struct mg_tcpip_driver_tm4c_data {
// MDC clock divider. MDC clock is derived from SYSCLK, must not exceed 2.5MHz
// SYSCLK range DIVIDER mdc_cr VALUE
// -------------------------------------
// -1 <-- tell driver to guess the value
// 60-100 MHz SYSCLK/42 0
// 100-150 MHz SYSCLK/62 1 <-- value for EK-TM4C129* on max speed
// 20-35 MHz SYSCLK/16 2
// 35-60 MHz SYSCLK/26 3
// 0x4-0xF Reserved
int mdc_cr; // Valid values: -1, 0, 1, 2, 3
};
#ifdef __cplusplus
}
#endif
#endif // MONGOOSE_H
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