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ba890408bd
nginx/src/http/ngx_http_spdy.c
Valentin Bartenev ba890408bd SPDY: removed ngx_http_spdy_state_headers_error(). 
The function just calls ngx_http_spdy_state_headers_skip() most of the time.
There was also an attempt of optimization to stop parsing if the client already
closed connection, but it looks strange and unfinished anyway.
2014-04-30 20:34:20 +04:00

3503 lines
100 KiB
C
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/*
* Copyright (C) Nginx, Inc.
* Copyright (C) Valentin V. Bartenev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ngx_http_spdy_module.h>
#include <zlib.h>
#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
#define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
*(uint32_t *) m == (c3 << 24 | c2 << 16 | c1 << 8 | c0) \
&& m[4] == c4
#else
#define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 && m[4] == c4
#endif
#if (NGX_HAVE_NONALIGNED)
#define ngx_spdy_frame_parse_uint16(p) ntohs(*(uint16_t *) (p))
#define ngx_spdy_frame_parse_uint32(p) ntohl(*(uint32_t *) (p))
#else
#define ngx_spdy_frame_parse_uint16(p) ((p)[0] << 8 | (p)[1])
#define ngx_spdy_frame_parse_uint32(p) \
((p)[0] << 24 | (p)[1] << 16 | (p)[2] << 8 | (p)[3])
#endif
#define ngx_spdy_frame_parse_sid(p) \
(ngx_spdy_frame_parse_uint32(p) & 0x7fffffff)
#define ngx_spdy_frame_parse_delta(p) \
(ngx_spdy_frame_parse_uint32(p) & 0x7fffffff)
#define ngx_spdy_ctl_frame_check(h) \
(((h) & 0xffff0000) == ngx_spdy_ctl_frame_head(0))
#define ngx_spdy_data_frame_check(h) \
(!((h) & (uint32_t) NGX_SPDY_CTL_BIT << 31))
#define ngx_spdy_ctl_frame_type(h) ((h) & 0x0000ffff)
#define ngx_spdy_frame_flags(p) ((p) >> 24)
#define ngx_spdy_frame_length(p) ((p) & 0x00ffffff)
#define ngx_spdy_frame_id(p) ((p) & 0x00ffffff)
#define NGX_SPDY_SKIP_HEADERS_BUFFER_SIZE 4096
#define NGX_SPDY_CTL_FRAME_BUFFER_SIZE 16
#define NGX_SPDY_PROTOCOL_ERROR 1
#define NGX_SPDY_INVALID_STREAM 2
#define NGX_SPDY_REFUSED_STREAM 3
#define NGX_SPDY_UNSUPPORTED_VERSION 4
#define NGX_SPDY_CANCEL 5
#define NGX_SPDY_INTERNAL_ERROR 6
#define NGX_SPDY_FLOW_CONTROL_ERROR 7
#define NGX_SPDY_STREAM_IN_USE 8
#define NGX_SPDY_STREAM_ALREADY_CLOSED 9
/* deprecated 10 */
#define NGX_SPDY_FRAME_TOO_LARGE 11
#define NGX_SPDY_SETTINGS_MAX_STREAMS 4
#define NGX_SPDY_SETTINGS_INIT_WINDOW 7
#define NGX_SPDY_SETTINGS_FLAG_PERSIST 0x01
#define NGX_SPDY_SETTINGS_FLAG_PERSISTED 0x02
#define NGX_SPDY_MAX_WINDOW NGX_MAX_INT32_VALUE
#define NGX_SPDY_CONNECTION_WINDOW 65536
#define NGX_SPDY_INIT_STREAM_WINDOW 65536
#define NGX_SPDY_STREAM_WINDOW NGX_SPDY_MAX_WINDOW
typedef struct {
ngx_uint_t hash;
u_char len;
u_char header[7];
ngx_int_t (*handler)(ngx_http_request_t *r);
} ngx_http_spdy_request_header_t;
static void ngx_http_spdy_read_handler(ngx_event_t *rev);
static void ngx_http_spdy_write_handler(ngx_event_t *wev);
static void ngx_http_spdy_handle_connection(ngx_http_spdy_connection_t *sc);
static u_char *ngx_http_spdy_proxy_protocol(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_head(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_syn_stream(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_headers(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_headers_skip(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_window_update(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_data(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_read_data(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_rst_stream(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_ping(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_skip(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_settings(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_complete(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
static u_char *ngx_http_spdy_state_save(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end, ngx_http_spdy_handler_pt handler);
static u_char *ngx_http_spdy_state_protocol_error(
ngx_http_spdy_connection_t *sc);
static u_char *ngx_http_spdy_state_internal_error(
ngx_http_spdy_connection_t *sc);
static ngx_int_t ngx_http_spdy_send_window_update(
ngx_http_spdy_connection_t *sc, ngx_uint_t sid, ngx_uint_t delta);
static ngx_int_t ngx_http_spdy_send_rst_stream(ngx_http_spdy_connection_t *sc,
ngx_uint_t sid, ngx_uint_t status, ngx_uint_t priority);
static ngx_int_t ngx_http_spdy_send_settings(ngx_http_spdy_connection_t *sc);
static ngx_int_t ngx_http_spdy_settings_frame_handler(
ngx_http_spdy_connection_t *sc, ngx_http_spdy_out_frame_t *frame);
static ngx_http_spdy_out_frame_t *ngx_http_spdy_get_ctl_frame(
ngx_http_spdy_connection_t *sc, size_t size, ngx_uint_t priority);
static ngx_int_t ngx_http_spdy_ctl_frame_handler(
ngx_http_spdy_connection_t *sc, ngx_http_spdy_out_frame_t *frame);
static ngx_http_spdy_stream_t *ngx_http_spdy_create_stream(
ngx_http_spdy_connection_t *sc, ngx_uint_t id, ngx_uint_t priority);
static ngx_http_spdy_stream_t *ngx_http_spdy_get_stream_by_id(
ngx_http_spdy_connection_t *sc, ngx_uint_t sid);
#define ngx_http_spdy_streams_index_size(sscf) (sscf->streams_index_mask + 1)
#define ngx_http_spdy_stream_index(sscf, sid) \
((sid >> 1) & sscf->streams_index_mask)
static ngx_int_t ngx_http_spdy_parse_header(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_alloc_large_header_buffer(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_handle_request_header(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_parse_method(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_parse_scheme(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_parse_host(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_parse_path(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_parse_version(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_construct_request_line(ngx_http_request_t *r);
static void ngx_http_spdy_run_request(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_init_request_body(ngx_http_request_t *r);
static ngx_int_t ngx_http_spdy_terminate_stream(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_stream_t *stream, ngx_uint_t status);
static void ngx_http_spdy_close_stream_handler(ngx_event_t *ev);
static void ngx_http_spdy_handle_connection_handler(ngx_event_t *rev);
static void ngx_http_spdy_keepalive_handler(ngx_event_t *rev);
static void ngx_http_spdy_finalize_connection(ngx_http_spdy_connection_t *sc,
ngx_int_t rc);
static ngx_int_t ngx_http_spdy_adjust_windows(ngx_http_spdy_connection_t *sc,
ssize_t delta);
static void ngx_http_spdy_pool_cleanup(void *data);
static void *ngx_http_spdy_zalloc(void *opaque, u_int items, u_int size);
static void ngx_http_spdy_zfree(void *opaque, void *address);
static const u_char ngx_http_spdy_dict[] = {
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0x65, 0x61, 0x64, 0x00, 0x00, 0x00, 0x04, 0x70, /* e a d - - - - p */
0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x03, 0x70, /* o s t - - - - p */
0x75, 0x74, 0x00, 0x00, 0x00, 0x06, 0x64, 0x65, /* u t - - - - d e */
0x6c, 0x65, 0x74, 0x65, 0x00, 0x00, 0x00, 0x05, /* l e t e - - - - */
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0x72, 0x65, 0x73, 0x00, 0x00, 0x00, 0x04, 0x66, /* r e s - - - - f */
0x72, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x04, 0x68, /* r o m - - - - h */
0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x08, 0x69, /* o s t - - - - i */
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0x64, 0x69, 0x66, 0x69, 0x65, 0x64, 0x2d, 0x73, /* d i f i e d - s */
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0x69, 0x66, 0x2d, 0x6e, 0x6f, 0x6e, 0x65, 0x2d, /* i f - n o n e - */
0x6d, 0x61, 0x74, 0x63, 0x68, 0x00, 0x00, 0x00, /* m a t c h - - - */
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0x75, 0x6e, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, /* u n m o d i f i */
0x65, 0x64, 0x2d, 0x73, 0x69, 0x6e, 0x63, 0x65, /* e d - s i n c e */
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0x64, 0x00, 0x00, 0x00, 0x08, 0x6c, 0x6f, 0x63, /* d - - - - l o c */
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0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0x2d, 0x65, /* a n s f e r - e */
0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x00, /* n c o d i n g - */
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0x64, 0x65, 0x00, 0x00, 0x00, 0x0a, 0x75, 0x73, /* d e - - - - u s */
0x65, 0x72, 0x2d, 0x61, 0x67, 0x65, 0x6e, 0x74, /* e r - a g e n t */
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0x6e, 0x67, 0x00, 0x00, 0x00, 0x10, 0x77, 0x77, /* n g - - - - w w */
0x77, 0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e, /* w - a u t h e n */
0x74, 0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00, /* t i c a t e - - */
0x00, 0x06, 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64, /* - - m e t h o d */
0x00, 0x00, 0x00, 0x03, 0x67, 0x65, 0x74, 0x00, /* - - - - g e t - */
0x00, 0x00, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75, /* - - - s t a t u */
0x73, 0x00, 0x00, 0x00, 0x06, 0x32, 0x30, 0x30, /* s - - - - 2 0 0 */
0x20, 0x4f, 0x4b, 0x00, 0x00, 0x00, 0x07, 0x76, /* - O K - - - - v */
0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x00, 0x00, /* e r s i o n - - */
0x00, 0x08, 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, /* - - H T T P - 1 */
0x2e, 0x31, 0x00, 0x00, 0x00, 0x03, 0x75, 0x72, /* - 1 - - - - u r */
0x6c, 0x00, 0x00, 0x00, 0x06, 0x70, 0x75, 0x62, /* l - - - - p u b */
0x6c, 0x69, 0x63, 0x00, 0x00, 0x00, 0x0a, 0x73, /* l i c - - - - s */
0x65, 0x74, 0x2d, 0x63, 0x6f, 0x6f, 0x6b, 0x69, /* e t - c o o k i */
0x65, 0x00, 0x00, 0x00, 0x0a, 0x6b, 0x65, 0x65, /* e - - - - k e e */
0x70, 0x2d, 0x61, 0x6c, 0x69, 0x76, 0x65, 0x00, /* p - a l i v e - */
0x00, 0x00, 0x06, 0x6f, 0x72, 0x69, 0x67, 0x69, /* - - - o r i g i */
0x6e, 0x31, 0x30, 0x30, 0x31, 0x30, 0x31, 0x32, /* n 1 0 0 1 0 1 2 */
0x30, 0x31, 0x32, 0x30, 0x32, 0x32, 0x30, 0x35, /* 0 1 2 0 2 2 0 5 */
0x32, 0x30, 0x36, 0x33, 0x30, 0x30, 0x33, 0x30, /* 2 0 6 3 0 0 3 0 */
0x32, 0x33, 0x30, 0x33, 0x33, 0x30, 0x34, 0x33, /* 2 3 0 3 3 0 4 3 */
0x30, 0x35, 0x33, 0x30, 0x36, 0x33, 0x30, 0x37, /* 0 5 3 0 6 3 0 7 */
0x34, 0x30, 0x32, 0x34, 0x30, 0x35, 0x34, 0x30, /* 4 0 2 4 0 5 4 0 */
0x36, 0x34, 0x30, 0x37, 0x34, 0x30, 0x38, 0x34, /* 6 4 0 7 4 0 8 4 */
0x30, 0x39, 0x34, 0x31, 0x30, 0x34, 0x31, 0x31, /* 0 9 4 1 0 4 1 1 */
0x34, 0x31, 0x32, 0x34, 0x31, 0x33, 0x34, 0x31, /* 4 1 2 4 1 3 4 1 */
0x34, 0x34, 0x31, 0x35, 0x34, 0x31, 0x36, 0x34, /* 4 4 1 5 4 1 6 4 */
0x31, 0x37, 0x35, 0x30, 0x32, 0x35, 0x30, 0x34, /* 1 7 5 0 2 5 0 4 */
0x35, 0x30, 0x35, 0x32, 0x30, 0x33, 0x20, 0x4e, /* 5 0 5 2 0 3 - N */
0x6f, 0x6e, 0x2d, 0x41, 0x75, 0x74, 0x68, 0x6f, /* o n - A u t h o */
0x72, 0x69, 0x74, 0x61, 0x74, 0x69, 0x76, 0x65, /* r i t a t i v e */
0x20, 0x49, 0x6e, 0x66, 0x6f, 0x72, 0x6d, 0x61, /* - I n f o r m a */
0x74, 0x69, 0x6f, 0x6e, 0x32, 0x30, 0x34, 0x20, /* t i o n 2 0 4 - */
0x4e, 0x6f, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x65, /* N o - C o n t e */
0x6e, 0x74, 0x33, 0x30, 0x31, 0x20, 0x4d, 0x6f, /* n t 3 0 1 - M o */
0x76, 0x65, 0x64, 0x20, 0x50, 0x65, 0x72, 0x6d, /* v e d - P e r m */
0x61, 0x6e, 0x65, 0x6e, 0x74, 0x6c, 0x79, 0x34, /* a n e n t l y 4 */
0x30, 0x30, 0x20, 0x42, 0x61, 0x64, 0x20, 0x52, /* 0 0 - B a d - R */
0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x34, 0x30, /* e q u e s t 4 0 */
0x31, 0x20, 0x55, 0x6e, 0x61, 0x75, 0x74, 0x68, /* 1 - U n a u t h */
0x6f, 0x72, 0x69, 0x7a, 0x65, 0x64, 0x34, 0x30, /* o r i z e d 4 0 */
0x33, 0x20, 0x46, 0x6f, 0x72, 0x62, 0x69, 0x64, /* 3 - F o r b i d */
0x64, 0x65, 0x6e, 0x34, 0x30, 0x34, 0x20, 0x4e, /* d e n 4 0 4 - N */
0x6f, 0x74, 0x20, 0x46, 0x6f, 0x75, 0x6e, 0x64, /* o t - F o u n d */
0x35, 0x30, 0x30, 0x20, 0x49, 0x6e, 0x74, 0x65, /* 5 0 0 - I n t e */
0x72, 0x6e, 0x61, 0x6c, 0x20, 0x53, 0x65, 0x72, /* r n a l - S e r */
0x76, 0x65, 0x72, 0x20, 0x45, 0x72, 0x72, 0x6f, /* v e r - E r r o */
0x72, 0x35, 0x30, 0x31, 0x20, 0x4e, 0x6f, 0x74, /* r 5 0 1 - N o t */
0x20, 0x49, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65, /* - I m p l e m e */
0x6e, 0x74, 0x65, 0x64, 0x35, 0x30, 0x33, 0x20, /* n t e d 5 0 3 - */
0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x20, /* S e r v i c e - */
0x55, 0x6e, 0x61, 0x76, 0x61, 0x69, 0x6c, 0x61, /* U n a v a i l a */
0x62, 0x6c, 0x65, 0x4a, 0x61, 0x6e, 0x20, 0x46, /* b l e J a n - F */
0x65, 0x62, 0x20, 0x4d, 0x61, 0x72, 0x20, 0x41, /* e b - M a r - A */
0x70, 0x72, 0x20, 0x4d, 0x61, 0x79, 0x20, 0x4a, /* p r - M a y - J */
0x75, 0x6e, 0x20, 0x4a, 0x75, 0x6c, 0x20, 0x41, /* u n - J u l - A */
0x75, 0x67, 0x20, 0x53, 0x65, 0x70, 0x74, 0x20, /* u g - S e p t - */
0x4f, 0x63, 0x74, 0x20, 0x4e, 0x6f, 0x76, 0x20, /* O c t - N o v - */
0x44, 0x65, 0x63, 0x20, 0x30, 0x30, 0x3a, 0x30, /* D e c - 0 0 - 0 */
0x30, 0x3a, 0x30, 0x30, 0x20, 0x4d, 0x6f, 0x6e, /* 0 - 0 0 - M o n */
0x2c, 0x20, 0x54, 0x75, 0x65, 0x2c, 0x20, 0x57, /* - - T u e - - W */
0x65, 0x64, 0x2c, 0x20, 0x54, 0x68, 0x75, 0x2c, /* e d - - T h u - */
0x20, 0x46, 0x72, 0x69, 0x2c, 0x20, 0x53, 0x61, /* - F r i - - S a */
0x74, 0x2c, 0x20, 0x53, 0x75, 0x6e, 0x2c, 0x20, /* t - - S u n - - */
0x47, 0x4d, 0x54, 0x63, 0x68, 0x75, 0x6e, 0x6b, /* G M T c h u n k */
0x65, 0x64, 0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f, /* e d - t e x t - */
0x68, 0x74, 0x6d, 0x6c, 0x2c, 0x69, 0x6d, 0x61, /* h t m l - i m a */
0x67, 0x65, 0x2f, 0x70, 0x6e, 0x67, 0x2c, 0x69, /* g e - p n g - i */
0x6d, 0x61, 0x67, 0x65, 0x2f, 0x6a, 0x70, 0x67, /* m a g e - j p g */
0x2c, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x67, /* - i m a g e - g */
0x69, 0x66, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69, /* i f - a p p l i */
0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78, /* c a t i o n - x */
0x6d, 0x6c, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69, /* m l - a p p l i */
0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78, /* c a t i o n - x */
0x68, 0x74, 0x6d, 0x6c, 0x2b, 0x78, 0x6d, 0x6c, /* h t m l - x m l */
0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x70, 0x6c, /* - t e x t - p l */
0x61, 0x69, 0x6e, 0x2c, 0x74, 0x65, 0x78, 0x74, /* a i n - t e x t */
0x2f, 0x6a, 0x61, 0x76, 0x61, 0x73, 0x63, 0x72, /* - j a v a s c r */
0x69, 0x70, 0x74, 0x2c, 0x70, 0x75, 0x62, 0x6c, /* i p t - p u b l */
0x69, 0x63, 0x70, 0x72, 0x69, 0x76, 0x61, 0x74, /* i c p r i v a t */
0x65, 0x6d, 0x61, 0x78, 0x2d, 0x61, 0x67, 0x65, /* e m a x - a g e */
0x3d, 0x67, 0x7a, 0x69, 0x70, 0x2c, 0x64, 0x65, /* - g z i p - d e */
0x66, 0x6c, 0x61, 0x74, 0x65, 0x2c, 0x73, 0x64, /* f l a t e - s d */
0x63, 0x68, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65, /* c h c h a r s e */
0x74, 0x3d, 0x75, 0x74, 0x66, 0x2d, 0x38, 0x63, /* t - u t f - 8 c */
0x68, 0x61, 0x72, 0x73, 0x65, 0x74, 0x3d, 0x69, /* h a r s e t - i */
0x73, 0x6f, 0x2d, 0x38, 0x38, 0x35, 0x39, 0x2d, /* s o - 8 8 5 9 - */
0x31, 0x2c, 0x75, 0x74, 0x66, 0x2d, 0x2c, 0x2a, /* 1 - u t f - - - */
0x2c, 0x65, 0x6e, 0x71, 0x3d, 0x30, 0x2e /* - e n q - 0 - */
};
static ngx_http_spdy_request_header_t ngx_http_spdy_request_headers[] = {
{ 0, 6, "method", ngx_http_spdy_parse_method },
{ 0, 6, "scheme", ngx_http_spdy_parse_scheme },
{ 0, 4, "host", ngx_http_spdy_parse_host },
{ 0, 4, "path", ngx_http_spdy_parse_path },
{ 0, 7, "version", ngx_http_spdy_parse_version },
};
#define NGX_SPDY_REQUEST_HEADERS \
(sizeof(ngx_http_spdy_request_headers) \
/ sizeof(ngx_http_spdy_request_header_t))
void
ngx_http_spdy_init(ngx_event_t *rev)
{
int rc;
ngx_connection_t *c;
ngx_pool_cleanup_t *cln;
ngx_http_connection_t *hc;
ngx_http_spdy_srv_conf_t *sscf;
ngx_http_spdy_main_conf_t *smcf;
ngx_http_spdy_connection_t *sc;
c = rev->data;
hc = c->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"init spdy request");
c->log->action = "processing SPDY";
smcf = ngx_http_get_module_main_conf(hc->conf_ctx, ngx_http_spdy_module);
if (smcf->recv_buffer == NULL) {
smcf->recv_buffer = ngx_palloc(ngx_cycle->pool, smcf->recv_buffer_size);
if (smcf->recv_buffer == NULL) {
ngx_http_close_connection(c);
return;
}
}
sc = ngx_pcalloc(c->pool, sizeof(ngx_http_spdy_connection_t));
if (sc == NULL) {
ngx_http_close_connection(c);
return;
}
sc->connection = c;
sc->http_connection = hc;
sc->send_window = NGX_SPDY_CONNECTION_WINDOW;
sc->recv_window = NGX_SPDY_CONNECTION_WINDOW;
sc->init_window = NGX_SPDY_INIT_STREAM_WINDOW;
sc->handler = ngx_http_spdy_state_head;
if (hc->proxy_protocol) {
c->log->action = "reading PROXY protocol";
sc->handler = ngx_http_spdy_proxy_protocol;
}
sc->zstream_in.zalloc = ngx_http_spdy_zalloc;
sc->zstream_in.zfree = ngx_http_spdy_zfree;
sc->zstream_in.opaque = sc;
rc = inflateInit(&sc->zstream_in);
if (rc != Z_OK) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"inflateInit() failed: %d", rc);
ngx_http_close_connection(c);
return;
}
sc->zstream_out.zalloc = ngx_http_spdy_zalloc;
sc->zstream_out.zfree = ngx_http_spdy_zfree;
sc->zstream_out.opaque = sc;
sscf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_spdy_module);
rc = deflateInit2(&sc->zstream_out, (int) sscf->headers_comp,
Z_DEFLATED, 11, 4, Z_DEFAULT_STRATEGY);
if (rc != Z_OK) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"deflateInit2() failed: %d", rc);
ngx_http_close_connection(c);
return;
}
rc = deflateSetDictionary(&sc->zstream_out, ngx_http_spdy_dict,
sizeof(ngx_http_spdy_dict));
if (rc != Z_OK) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"deflateSetDictionary() failed: %d", rc);
ngx_http_close_connection(c);
return;
}
sc->pool = ngx_create_pool(sscf->pool_size, sc->connection->log);
if (sc->pool == NULL) {
ngx_http_close_connection(c);
return;
}
cln = ngx_pool_cleanup_add(c->pool, sizeof(ngx_pool_cleanup_file_t));
if (cln == NULL) {
ngx_http_close_connection(c);
return;
}
cln->handler = ngx_http_spdy_pool_cleanup;
cln->data = sc;
sc->streams_index = ngx_pcalloc(sc->pool,
ngx_http_spdy_streams_index_size(sscf)
* sizeof(ngx_http_spdy_stream_t *));
if (sc->streams_index == NULL) {
ngx_http_close_connection(c);
return;
}
if (ngx_http_spdy_send_settings(sc) == NGX_ERROR) {
ngx_http_close_connection(c);
return;
}
if (ngx_http_spdy_send_window_update(sc, 0, NGX_SPDY_MAX_WINDOW
- sc->recv_window)
== NGX_ERROR)
{
ngx_http_close_connection(c);
return;
}
sc->recv_window = NGX_SPDY_MAX_WINDOW;
ngx_queue_init(&sc->waiting);
ngx_queue_init(&sc->posted);
c->data = sc;
rev->handler = ngx_http_spdy_read_handler;
c->write->handler = ngx_http_spdy_write_handler;
ngx_http_spdy_read_handler(rev);
}
static void
ngx_http_spdy_read_handler(ngx_event_t *rev)
{
u_char *p, *end;
size_t available;
ssize_t n;
ngx_connection_t *c;
ngx_http_spdy_main_conf_t *smcf;
ngx_http_spdy_connection_t *sc;
c = rev->data;
sc = c->data;
if (rev->timedout) {
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_REQUEST_TIME_OUT);
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "spdy read handler");
sc->blocked = 1;
smcf = ngx_http_get_module_main_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
available = smcf->recv_buffer_size - 2 * NGX_SPDY_STATE_BUFFER_SIZE;
do {
p = smcf->recv_buffer;
ngx_memcpy(p, sc->buffer, NGX_SPDY_STATE_BUFFER_SIZE);
end = p + sc->buffer_used;
n = c->recv(c, end, available);
if (n == NGX_AGAIN) {
break;
}
if (n == 0 && (sc->incomplete || sc->processing)) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client closed prematurely connection");
}
if (n == 0 || n == NGX_ERROR) {
ngx_http_spdy_finalize_connection(sc,
NGX_HTTP_CLIENT_CLOSED_REQUEST);
return;
}
end += n;
sc->buffer_used = 0;
sc->incomplete = 0;
do {
p = sc->handler(sc, p, end);
if (p == NULL) {
return;
}
} while (p != end);
} while (rev->ready);
if (ngx_handle_read_event(rev, 0) != NGX_OK) {
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
if (sc->last_out && ngx_http_spdy_send_output_queue(sc) == NGX_ERROR) {
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_CLIENT_CLOSED_REQUEST);
return;
}
sc->blocked = 0;
if (sc->processing) {
if (rev->timer_set) {
ngx_del_timer(rev);
}
return;
}
ngx_http_spdy_handle_connection(sc);
}
static void
ngx_http_spdy_write_handler(ngx_event_t *wev)
{
ngx_int_t rc;
ngx_queue_t *q;
ngx_connection_t *c;
ngx_http_spdy_stream_t *stream;
ngx_http_spdy_connection_t *sc;
c = wev->data;
sc = c->data;
if (wev->timedout) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"spdy write event timed out");
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_CLIENT_CLOSED_REQUEST);
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "spdy write handler");
sc->blocked = 1;
rc = ngx_http_spdy_send_output_queue(sc);
if (rc == NGX_ERROR) {
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_CLIENT_CLOSED_REQUEST);
return;
}
while (!ngx_queue_empty(&sc->posted)) {
q = ngx_queue_head(&sc->posted);
ngx_queue_remove(q);
stream = ngx_queue_data(q, ngx_http_spdy_stream_t, queue);
stream->handled = 0;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"spdy run stream %ui", stream->id);
wev = stream->request->connection->write;
wev->handler(wev);
}
sc->blocked = 0;
if (rc == NGX_AGAIN) {
return;
}
ngx_http_spdy_handle_connection(sc);
}
ngx_int_t
ngx_http_spdy_send_output_queue(ngx_http_spdy_connection_t *sc)
{
ngx_chain_t *cl;
ngx_event_t *wev;
ngx_connection_t *c;
ngx_http_core_loc_conf_t *clcf;
ngx_http_spdy_out_frame_t *out, *frame, *fn;
c = sc->connection;
if (c->error) {
return NGX_ERROR;
}
wev = c->write;
if (!wev->ready) {
return NGX_OK;
}
cl = NULL;
out = NULL;
for (frame = sc->last_out; frame; frame = fn) {
frame->last->next = cl;
cl = frame->first;
fn = frame->next;
frame->next = out;
out = frame;
ngx_log_debug5(NGX_LOG_DEBUG_HTTP, c->log, 0,
"spdy frame out: %p sid:%ui prio:%ui bl:%d len:%uz",
out, out->stream ? out->stream->id : 0, out->priority,
out->blocked, out->length);
}
cl = c->send_chain(c, cl, 0);
if (cl == NGX_CHAIN_ERROR) {
c->error = 1;
if (!sc->blocked) {
ngx_post_event(wev, &ngx_posted_events);
}
return NGX_ERROR;
}
clcf = ngx_http_get_module_loc_conf(sc->http_connection->conf_ctx,
ngx_http_core_module);
if (ngx_handle_write_event(wev, clcf->send_lowat) != NGX_OK) {
return NGX_ERROR; /* FIXME */
}
if (cl) {
ngx_add_timer(wev, clcf->send_timeout);
} else {
if (wev->timer_set) {
ngx_del_timer(wev);
}
}
for ( /* void */ ; out; out = fn) {
fn = out->next;
if (out->handler(sc, out) != NGX_OK) {
out->blocked = 1;
out->priority = NGX_SPDY_HIGHEST_PRIORITY;
break;
}
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, c->log, 0,
"spdy frame sent: %p sid:%ui bl:%d len:%uz",
out, out->stream ? out->stream->id : 0,
out->blocked, out->length);
}
frame = NULL;
for ( /* void */ ; out; out = fn) {
fn = out->next;
out->next = frame;
frame = out;
}
sc->last_out = frame;
return NGX_OK;
}
static void
ngx_http_spdy_handle_connection(ngx_http_spdy_connection_t *sc)
{
ngx_connection_t *c;
ngx_http_spdy_srv_conf_t *sscf;
if (sc->last_out || sc->processing) {
return;
}
c = sc->connection;
if (c->error) {
ngx_http_close_connection(c);
return;
}
if (c->buffered) {
return;
}
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
if (sc->incomplete) {
ngx_add_timer(c->read, sscf->recv_timeout);
return;
}
if (ngx_terminate || ngx_exiting) {
ngx_http_close_connection(c);
return;
}
ngx_destroy_pool(sc->pool);
sc->pool = NULL;
sc->free_ctl_frames = NULL;
sc->free_fake_connections = NULL;
#if (NGX_HTTP_SSL)
if (c->ssl) {
ngx_ssl_free_buffer(c);
}
#endif
c->destroyed = 1;
c->idle = 1;
ngx_reusable_connection(c, 1);
c->write->handler = ngx_http_empty_handler;
c->read->handler = ngx_http_spdy_keepalive_handler;
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
ngx_add_timer(c->read, sscf->keepalive_timeout);
}
static u_char *
ngx_http_spdy_proxy_protocol(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
pos = ngx_proxy_protocol_parse(sc->connection, pos, end);
if (pos == NULL) {
return ngx_http_spdy_state_protocol_error(sc);
}
sc->connection->log->action = "processing SPDY";
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_head(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
uint32_t head, flen;
ngx_uint_t type;
if (end - pos < NGX_SPDY_FRAME_HEADER_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_head);
}
head = ngx_spdy_frame_parse_uint32(pos);
pos += sizeof(uint32_t);
flen = ngx_spdy_frame_parse_uint32(pos);
sc->flags = ngx_spdy_frame_flags(flen);
sc->length = ngx_spdy_frame_length(flen);
pos += sizeof(uint32_t);
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy process frame head:%08XD f:%Xd l:%uz",
head, sc->flags, sc->length);
if (ngx_spdy_ctl_frame_check(head)) {
type = ngx_spdy_ctl_frame_type(head);
switch (type) {
case NGX_SPDY_SYN_STREAM:
return ngx_http_spdy_state_syn_stream(sc, pos, end);
case NGX_SPDY_SYN_REPLY:
return ngx_http_spdy_state_protocol_error(sc);
case NGX_SPDY_RST_STREAM:
return ngx_http_spdy_state_rst_stream(sc, pos, end);
case NGX_SPDY_SETTINGS:
return ngx_http_spdy_state_settings(sc, pos, end);
case NGX_SPDY_PING:
return ngx_http_spdy_state_ping(sc, pos, end);
case NGX_SPDY_GOAWAY:
return ngx_http_spdy_state_skip(sc, pos, end); /* TODO */
case NGX_SPDY_HEADERS:
return ngx_http_spdy_state_protocol_error(sc);
case NGX_SPDY_WINDOW_UPDATE:
return ngx_http_spdy_state_window_update(sc, pos, end);
default:
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy control frame with unknown type %ui", type);
return ngx_http_spdy_state_skip(sc, pos, end);
}
}
if (ngx_spdy_data_frame_check(head)) {
sc->stream = ngx_http_spdy_get_stream_by_id(sc, head);
return ngx_http_spdy_state_data(sc, pos, end);
}
/* TODO version & type check */
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy unknown frame");
return ngx_http_spdy_state_protocol_error(sc);
}
static u_char *
ngx_http_spdy_state_syn_stream(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
ngx_uint_t sid, prio;
ngx_http_spdy_stream_t *stream;
ngx_http_spdy_srv_conf_t *sscf;
if (end - pos < NGX_SPDY_SYN_STREAM_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_syn_stream);
}
if (sc->length <= NGX_SPDY_SYN_STREAM_SIZE) {
/* TODO logging */
return ngx_http_spdy_state_protocol_error(sc);
}
sc->length -= NGX_SPDY_SYN_STREAM_SIZE;
sid = ngx_spdy_frame_parse_sid(pos);
prio = pos[8] >> 5;
pos += NGX_SPDY_SYN_STREAM_SIZE;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy SYN_STREAM frame sid:%ui prio:%ui", sid, prio);
if (sid % 2 == 0 || sid <= sc->last_sid) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent SYN_STREAM frame "
"with invalid Stream-ID %ui", sid);
stream = ngx_http_spdy_get_stream_by_id(sc, sid);
if (stream) {
if (ngx_http_spdy_terminate_stream(sc, stream,
NGX_SPDY_PROTOCOL_ERROR)
!= NGX_OK)
{
return ngx_http_spdy_state_internal_error(sc);
}
}
return ngx_http_spdy_state_protocol_error(sc);
}
sc->last_sid = sid;
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
if (sc->processing >= sscf->concurrent_streams) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"spdy concurrent streams exceeded %ui", sc->processing);
if (ngx_http_spdy_send_rst_stream(sc, sid, NGX_SPDY_REFUSED_STREAM,
prio)
!= NGX_OK)
{
return ngx_http_spdy_state_internal_error(sc);
}
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
stream = ngx_http_spdy_create_stream(sc, sid, prio);
if (stream == NULL) {
return ngx_http_spdy_state_internal_error(sc);
}
stream->in_closed = (sc->flags & NGX_SPDY_FLAG_FIN) ? 1 : 0;
stream->request->request_length = NGX_SPDY_FRAME_HEADER_SIZE
+ NGX_SPDY_SYN_STREAM_SIZE
+ sc->length;
sc->stream = stream;
return ngx_http_spdy_state_headers(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_headers(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
int z;
size_t size;
ngx_buf_t *buf;
ngx_int_t rc;
ngx_uint_t complete;
ngx_http_request_t *r;
size = end - pos;
if (size == 0) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers);
}
if (size >= sc->length) {
size = sc->length;
complete = 1;
} else {
complete = 0;
}
r = sc->stream->request;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy process HEADERS %uz of %uz", size, sc->length);
buf = r->header_in;
sc->zstream_in.next_in = pos;
sc->zstream_in.avail_in = size;
sc->zstream_in.next_out = buf->last;
/* one byte is reserved for null-termination of the last header value */
sc->zstream_in.avail_out = buf->end - buf->last - 1;
z = inflate(&sc->zstream_in, Z_NO_FLUSH);
if (z == Z_NEED_DICT) {
z = inflateSetDictionary(&sc->zstream_in, ngx_http_spdy_dict,
sizeof(ngx_http_spdy_dict));
if (z != Z_OK) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"spdy inflateSetDictionary() failed: %d", z);
return ngx_http_spdy_state_protocol_error(sc);
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy inflateSetDictionary(): %d", z);
z = sc->zstream_in.avail_in ? inflate(&sc->zstream_in, Z_NO_FLUSH)
: Z_OK;
}
if (z != Z_OK) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"spdy inflate() failed: %d", z);
return ngx_http_spdy_state_protocol_error(sc);
}
ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy inflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
sc->zstream_in.next_in, sc->zstream_in.next_out,
sc->zstream_in.avail_in, sc->zstream_in.avail_out,
z);
sc->length -= sc->zstream_in.next_in - pos;
pos = sc->zstream_in.next_in;
buf->last = sc->zstream_in.next_out;
if (r->headers_in.headers.part.elts == NULL) {
if (buf->last - buf->pos < NGX_SPDY_NV_NUM_SIZE) {
if (complete) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent SYN_STREAM frame "
"with invalid HEADERS block");
return ngx_http_spdy_state_protocol_error(sc);
}
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers);
}
sc->entries = ngx_spdy_frame_parse_uint32(buf->pos);
buf->pos += NGX_SPDY_NV_NUM_SIZE;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy HEADERS block consists of %ui entries",
sc->entries);
if (ngx_list_init(&r->headers_in.headers, r->pool, 20,
sizeof(ngx_table_elt_t))
!= NGX_OK)
{
ngx_http_spdy_close_stream(sc->stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
if (ngx_array_init(&r->headers_in.cookies, r->pool, 2,
sizeof(ngx_table_elt_t *))
!= NGX_OK)
{
ngx_http_spdy_close_stream(sc->stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
}
while (sc->entries) {
rc = ngx_http_spdy_parse_header(r);
switch (rc) {
case NGX_DONE:
sc->entries--;
case NGX_OK:
break;
case NGX_AGAIN:
if (sc->zstream_in.avail_in) {
rc = ngx_http_spdy_alloc_large_header_buffer(r);
if (rc == NGX_DECLINED) {
/* TODO logging */
ngx_http_finalize_request(r,
NGX_HTTP_REQUEST_HEADER_TOO_LARGE);
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
if (rc != NGX_OK) {
ngx_http_spdy_close_stream(sc->stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
/* null-terminate the last processed header name or value */
*buf->pos = '\0';
buf = r->header_in;
sc->zstream_in.next_out = buf->last;
/* one byte is reserved for null-termination */
sc->zstream_in.avail_out = buf->end - buf->last - 1;
z = inflate(&sc->zstream_in, Z_NO_FLUSH);
if (z != Z_OK) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"spdy inflate() failed: %d", z);
return ngx_http_spdy_state_protocol_error(sc);
}
sc->length -= sc->zstream_in.next_in - pos;
pos = sc->zstream_in.next_in;
buf->last = sc->zstream_in.next_out;
continue;
}
if (complete) {
/* TODO: improve error message */
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy again while last chunk");
return ngx_http_spdy_state_protocol_error(sc);
}
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers);
case NGX_HTTP_PARSE_INVALID_REQUEST:
/* TODO: improve error message */
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent invalid header line");
ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
return ngx_http_spdy_state_headers_skip(sc, pos, end);
default: /* NGX_HTTP_PARSE_INVALID_HEADER */
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent invalid HEADERS spdy frame");
return ngx_http_spdy_state_protocol_error(sc);
}
/* a header line has been parsed successfully */
rc = ngx_http_spdy_handle_request_header(r);
if (rc != NGX_OK) {
if (rc == NGX_HTTP_PARSE_INVALID_HEADER) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent invalid HEADERS spdy frame");
return ngx_http_spdy_state_protocol_error(sc);
}
if (rc == NGX_HTTP_PARSE_INVALID_REQUEST) {
ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
}
return ngx_http_spdy_state_headers_skip(sc, pos, end);
}
}
if (buf->pos != buf->last || sc->zstream_in.avail_in) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent SYN_STREAM frame "
"with invalid HEADERS block");
return ngx_http_spdy_state_protocol_error(sc);
}
if (!complete) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers);
}
/* null-terminate the last header value */
*buf->pos = '\0';
ngx_http_spdy_run_request(r);
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_headers_skip(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
int n;
size_t size;
u_char buffer[NGX_SPDY_SKIP_HEADERS_BUFFER_SIZE];
if (sc->length == 0) {
return ngx_http_spdy_state_complete(sc, pos, end);
}
size = end - pos;
if (size == 0) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers_skip);
}
sc->zstream_in.next_in = pos;
sc->zstream_in.avail_in = (size < sc->length) ? size : sc->length;
while (sc->zstream_in.avail_in) {
sc->zstream_in.next_out = buffer;
sc->zstream_in.avail_out = NGX_SPDY_SKIP_HEADERS_BUFFER_SIZE;
n = inflate(&sc->zstream_in, Z_NO_FLUSH);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy inflate(): %d", n);
if (n != Z_OK) {
/* TODO: logging */
return ngx_http_spdy_state_protocol_error(sc);
}
}
pos = sc->zstream_in.next_in;
if (size < sc->length) {
sc->length -= size;
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_headers_skip);
}
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_window_update(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
size_t delta;
ngx_uint_t sid;
ngx_event_t *wev;
ngx_queue_t *q;
ngx_http_spdy_stream_t *stream;
if (end - pos < NGX_SPDY_WINDOW_UPDATE_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_window_update);
}
if (sc->length != NGX_SPDY_WINDOW_UPDATE_SIZE) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent WINDOW_UPDATE frame "
"with incorrect length %uz", sc->length);
return ngx_http_spdy_state_protocol_error(sc);
}
sid = ngx_spdy_frame_parse_sid(pos);
pos += NGX_SPDY_SID_SIZE;
delta = ngx_spdy_frame_parse_delta(pos);
pos += NGX_SPDY_DELTA_SIZE;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy WINDOW_UPDATE sid:%ui delta:%ui", sid, delta);
if (sid) {
stream = ngx_http_spdy_get_stream_by_id(sc, sid);
if (stream == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"unknown spdy stream");
return ngx_http_spdy_state_complete(sc, pos, end);
}
if (stream->send_window > (ssize_t) (NGX_SPDY_MAX_WINDOW - delta)) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client violated flow control for stream %ui: "
"received WINDOW_UPDATE frame with delta %uz "
"that is not allowed for window %z",
sid, delta, stream->send_window);
if (ngx_http_spdy_terminate_stream(sc, stream,
NGX_SPDY_FLOW_CONTROL_ERROR)
== NGX_ERROR)
{
return ngx_http_spdy_state_internal_error(sc);
}
return ngx_http_spdy_state_complete(sc, pos, end);
}
stream->send_window += delta;
if (stream->exhausted) {
stream->exhausted = 0;
wev = stream->request->connection->write;
if (!wev->timer_set) {
wev->delayed = 0;
wev->handler(wev);
}
}
} else {
sc->send_window += delta;
if (sc->send_window > NGX_SPDY_MAX_WINDOW) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client violated connection flow control: "
"received WINDOW_UPDATE frame with delta %uz "
"that is not allowed for window %uz",
delta, sc->send_window);
return ngx_http_spdy_state_protocol_error(sc);
}
while (!ngx_queue_empty(&sc->waiting)) {
q = ngx_queue_head(&sc->waiting);
ngx_queue_remove(q);
stream = ngx_queue_data(q, ngx_http_spdy_stream_t, queue);
stream->handled = 0;
wev = stream->request->connection->write;
if (!wev->timer_set) {
wev->delayed = 0;
wev->handler(wev);
if (sc->send_window == 0) {
break;
}
}
}
}
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_data(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
ngx_http_spdy_stream_t *stream;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy DATA frame");
if (sc->length > sc->recv_window) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client violated connection flow control: length of "
"received DATA frame %uz, while available window %uz",
sc->length, sc->recv_window);
return ngx_http_spdy_state_protocol_error(sc);
}
sc->recv_window -= sc->length;
if (sc->recv_window < NGX_SPDY_MAX_WINDOW / 4) {
if (ngx_http_spdy_send_window_update(sc, 0,
NGX_SPDY_MAX_WINDOW
- sc->recv_window)
== NGX_ERROR)
{
return ngx_http_spdy_state_internal_error(sc);
}
sc->recv_window = NGX_SPDY_MAX_WINDOW;
}
stream = sc->stream;
if (stream == NULL) {
return ngx_http_spdy_state_skip(sc, pos, end);
}
if (sc->length > stream->recv_window) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client violated flow control for stream %ui: length of "
"received DATA frame %uz, while available window %uz",
stream->id, sc->length, stream->recv_window);
if (ngx_http_spdy_terminate_stream(sc, stream,
NGX_SPDY_FLOW_CONTROL_ERROR)
== NGX_ERROR)
{
return ngx_http_spdy_state_internal_error(sc);
}
return ngx_http_spdy_state_skip(sc, pos, end);
}
stream->recv_window -= sc->length;
if (stream->recv_window < NGX_SPDY_STREAM_WINDOW / 4) {
if (ngx_http_spdy_send_window_update(sc, stream->id,
NGX_SPDY_STREAM_WINDOW
- stream->recv_window)
== NGX_ERROR)
{
return ngx_http_spdy_state_internal_error(sc);
}
stream->recv_window = NGX_SPDY_STREAM_WINDOW;
}
if (stream->in_closed) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent DATA frame for half closed stream %ui",
stream->id);
if (ngx_http_spdy_terminate_stream(sc, stream,
NGX_SPDY_STREAM_ALREADY_CLOSED)
== NGX_ERROR)
{
return ngx_http_spdy_state_internal_error(sc);
}
return ngx_http_spdy_state_skip(sc, pos, end);
}
return ngx_http_spdy_state_read_data(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_read_data(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
size_t size;
ssize_t n;
ngx_buf_t *buf;
ngx_int_t rc;
ngx_temp_file_t *tf;
ngx_http_request_t *r;
ngx_http_spdy_stream_t *stream;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
stream = sc->stream;
if (stream == NULL) {
return ngx_http_spdy_state_skip(sc, pos, end);
}
if (stream->skip_data) {
if (sc->flags & NGX_SPDY_FLAG_FIN) {
stream->in_closed = 1;
}
/* TODO log and accounting */
return ngx_http_spdy_state_skip(sc, pos, end);
}
size = end - pos;
if (size > sc->length) {
size = sc->length;
}
r = stream->request;
if (r->request_body == NULL
&& ngx_http_spdy_init_request_body(r) != NGX_OK)
{
stream->skip_data = NGX_SPDY_DATA_INTERNAL_ERROR;
return ngx_http_spdy_state_skip(sc, pos, end);
}
rb = r->request_body;
tf = rb->temp_file;
buf = rb->buf;
if (size) {
rb->rest += size;
if (r->headers_in.content_length_n != -1
&& r->headers_in.content_length_n < rb->rest)
{
/* TODO logging */
stream->skip_data = NGX_SPDY_DATA_ERROR;
goto error;
} else {
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->client_max_body_size
&& clcf->client_max_body_size < rb->rest)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"client intended to send too large chunked "
"body: %O bytes",
rb->rest);
stream->skip_data = NGX_SPDY_DATA_ERROR;
goto error;
}
}
sc->length -= size;
if (tf) {
buf->start = pos;
buf->pos = pos;
pos += size;
buf->end = pos;
buf->last = pos;
n = ngx_write_chain_to_temp_file(tf, rb->bufs);
/* TODO: n == 0 or not complete and level event */
if (n == NGX_ERROR) {
stream->skip_data = NGX_SPDY_DATA_INTERNAL_ERROR;
goto error;
}
tf->offset += n;
} else {
buf->last = ngx_cpymem(buf->last, pos, size);
pos += size;
}
r->request_length += size;
}
if (sc->length) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_read_data);
}
if (sc->flags & NGX_SPDY_FLAG_FIN) {
stream->in_closed = 1;
if (r->headers_in.content_length_n < 0) {
r->headers_in.content_length_n = rb->rest;
} else if (r->headers_in.content_length_n != rb->rest) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client prematurely closed stream: "
"%O of %O bytes of request body received",
rb->rest, r->headers_in.content_length_n);
stream->skip_data = NGX_SPDY_DATA_ERROR;
goto error;
}
if (tf) {
ngx_memzero(buf, sizeof(ngx_buf_t));
buf->in_file = 1;
buf->file_last = tf->file.offset;
buf->file = &tf->file;
rb->buf = NULL;
}
if (rb->post_handler) {
r->read_event_handler = ngx_http_block_reading;
rb->post_handler(r);
}
}
return ngx_http_spdy_state_complete(sc, pos, end);
error:
if (rb->post_handler) {
if (stream->skip_data == NGX_SPDY_DATA_ERROR) {
rc = (r->headers_in.content_length_n == -1)
? NGX_HTTP_REQUEST_ENTITY_TOO_LARGE
: NGX_HTTP_BAD_REQUEST;
} else {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_finalize_request(r, rc);
}
return ngx_http_spdy_state_skip(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_rst_stream(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
ngx_uint_t sid, status;
ngx_event_t *ev;
ngx_connection_t *fc;
ngx_http_spdy_stream_t *stream;
if (end - pos < NGX_SPDY_RST_STREAM_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_rst_stream);
}
if (sc->length != NGX_SPDY_RST_STREAM_SIZE) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent RST_STREAM frame with incorrect length %uz",
sc->length);
return ngx_http_spdy_state_protocol_error(sc);
}
sid = ngx_spdy_frame_parse_sid(pos);
pos += NGX_SPDY_SID_SIZE;
status = ngx_spdy_frame_parse_uint32(pos);
pos += sizeof(uint32_t);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy RST_STREAM sid:%ui st:%ui", sid, status);
stream = ngx_http_spdy_get_stream_by_id(sc, sid);
if (stream == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"unknown stream, probably it has been closed already");
return ngx_http_spdy_state_complete(sc, pos, end);
}
stream->in_closed = 1;
stream->out_closed = 1;
fc = stream->request->connection;
fc->error = 1;
switch (status) {
case NGX_SPDY_CANCEL:
ngx_log_error(NGX_LOG_INFO, fc->log, 0,
"client canceled stream %ui", sid);
break;
case NGX_SPDY_INTERNAL_ERROR:
ngx_log_error(NGX_LOG_INFO, fc->log, 0,
"client terminated stream %ui because of internal error",
sid);
break;
default:
ngx_log_error(NGX_LOG_INFO, fc->log, 0,
"client terminated stream %ui with status %ui",
sid, status);
break;
}
ev = fc->read;
ev->handler(ev);
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_ping(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
u_char *p;
ngx_buf_t *buf;
ngx_http_spdy_out_frame_t *frame;
if (end - pos < NGX_SPDY_PING_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_ping);
}
if (sc->length != NGX_SPDY_PING_SIZE) {
/* TODO logging */
return ngx_http_spdy_state_protocol_error(sc);
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy PING frame");
frame = ngx_http_spdy_get_ctl_frame(sc, NGX_SPDY_PING_SIZE,
NGX_SPDY_HIGHEST_PRIORITY);
if (frame == NULL) {
return ngx_http_spdy_state_internal_error(sc);
}
buf = frame->first->buf;
p = buf->pos;
p = ngx_spdy_frame_write_head(p, NGX_SPDY_PING);
p = ngx_spdy_frame_write_flags_and_len(p, 0, NGX_SPDY_PING_SIZE);
p = ngx_cpymem(p, pos, NGX_SPDY_PING_SIZE);
buf->last = p;
ngx_http_spdy_queue_frame(sc, frame);
pos += NGX_SPDY_PING_SIZE;
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_skip(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
size_t size;
size = end - pos;
if (size < sc->length) {
sc->length -= size;
return ngx_http_spdy_state_save(sc, end, end,
ngx_http_spdy_state_skip);
}
return ngx_http_spdy_state_complete(sc, pos + sc->length, end);
}
static u_char *
ngx_http_spdy_state_settings(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
ngx_uint_t fid, val;
if (sc->entries == 0) {
if (end - pos < NGX_SPDY_SETTINGS_NUM_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_settings);
}
sc->entries = ngx_spdy_frame_parse_uint32(pos);
pos += NGX_SPDY_SETTINGS_NUM_SIZE;
sc->length -= NGX_SPDY_SETTINGS_NUM_SIZE;
if (sc->length < sc->entries * NGX_SPDY_SETTINGS_PAIR_SIZE) {
/* TODO logging */
return ngx_http_spdy_state_protocol_error(sc);
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy SETTINGS frame consists of %ui entries",
sc->entries);
}
while (sc->entries) {
if (end - pos < NGX_SPDY_SETTINGS_PAIR_SIZE) {
return ngx_http_spdy_state_save(sc, pos, end,
ngx_http_spdy_state_settings);
}
sc->entries--;
sc->length -= NGX_SPDY_SETTINGS_PAIR_SIZE;
fid = ngx_spdy_frame_parse_uint32(pos);
pos += NGX_SPDY_SETTINGS_FID_SIZE;
val = ngx_spdy_frame_parse_uint32(pos);
pos += NGX_SPDY_SETTINGS_VAL_SIZE;
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy SETTINGS entry fl:%ui id:%ui val:%ui",
ngx_spdy_frame_flags(fid), ngx_spdy_frame_id(fid), val);
if (ngx_spdy_frame_flags(fid) == NGX_SPDY_SETTINGS_FLAG_PERSISTED) {
continue;
}
switch (ngx_spdy_frame_id(fid)) {
case NGX_SPDY_SETTINGS_INIT_WINDOW:
if (val > NGX_SPDY_MAX_WINDOW) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent SETTINGS frame with "
"incorrect INIT_WINDOW value: %ui", val);
return ngx_http_spdy_state_protocol_error(sc);
}
if (ngx_http_spdy_adjust_windows(sc, val - sc->init_window)
!= NGX_OK)
{
return ngx_http_spdy_state_internal_error(sc);
}
sc->init_window = val;
continue;
}
}
return ngx_http_spdy_state_complete(sc, pos, end);
}
static u_char *
ngx_http_spdy_state_complete(ngx_http_spdy_connection_t *sc, u_char *pos,
u_char *end)
{
sc->handler = ngx_http_spdy_state_head;
sc->stream = NULL;
return pos;
}
static u_char *
ngx_http_spdy_state_save(ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end, ngx_http_spdy_handler_pt handler)
{
size_t size;
size = end - pos;
if (size > NGX_SPDY_STATE_BUFFER_SIZE) {
ngx_log_error(NGX_LOG_ALERT, sc->connection->log, 0,
"spdy state buffer overflow: "
"%uz bytes required", size);
return ngx_http_spdy_state_internal_error(sc);
}
ngx_memcpy(sc->buffer, pos, NGX_SPDY_STATE_BUFFER_SIZE);
sc->buffer_used = size;
sc->handler = handler;
sc->incomplete = 1;
return end;
}
static u_char *
ngx_http_spdy_state_protocol_error(ngx_http_spdy_connection_t *sc)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy state protocol error");
if (sc->stream) {
sc->stream->out_closed = 1;
ngx_http_spdy_close_stream(sc->stream, NGX_HTTP_BAD_REQUEST);
}
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_CLIENT_CLOSED_REQUEST);
return NULL;
}
static u_char *
ngx_http_spdy_state_internal_error(ngx_http_spdy_connection_t *sc)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy state internal error");
/* TODO */
ngx_http_spdy_finalize_connection(sc, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NULL;
}
static ngx_int_t
ngx_http_spdy_send_window_update(ngx_http_spdy_connection_t *sc, ngx_uint_t sid,
ngx_uint_t delta)
{
u_char *p;
ngx_buf_t *buf;
ngx_http_spdy_out_frame_t *frame;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy write WINDOW_UPDATE sid:%ui delta:%ui", sid, delta);
frame = ngx_http_spdy_get_ctl_frame(sc, NGX_SPDY_WINDOW_UPDATE_SIZE,
NGX_SPDY_HIGHEST_PRIORITY);
if (frame == NULL) {
return NGX_ERROR;
}
buf = frame->first->buf;
p = buf->pos;
p = ngx_spdy_frame_write_head(p, NGX_SPDY_WINDOW_UPDATE);
p = ngx_spdy_frame_write_flags_and_len(p, 0, NGX_SPDY_WINDOW_UPDATE_SIZE);
p = ngx_spdy_frame_write_sid(p, sid);
p = ngx_spdy_frame_aligned_write_uint32(p, delta);
buf->last = p;
ngx_http_spdy_queue_frame(sc, frame);
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_send_rst_stream(ngx_http_spdy_connection_t *sc, ngx_uint_t sid,
ngx_uint_t status, ngx_uint_t priority)
{
u_char *p;
ngx_buf_t *buf;
ngx_http_spdy_out_frame_t *frame;
if (sc->connection->error) {
return NGX_OK;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy write RST_STREAM sid:%ui st:%ui", sid, status);
frame = ngx_http_spdy_get_ctl_frame(sc, NGX_SPDY_RST_STREAM_SIZE,
priority);
if (frame == NULL) {
return NGX_ERROR;
}
buf = frame->first->buf;
p = buf->pos;
p = ngx_spdy_frame_write_head(p, NGX_SPDY_RST_STREAM);
p = ngx_spdy_frame_write_flags_and_len(p, 0, NGX_SPDY_RST_STREAM_SIZE);
p = ngx_spdy_frame_write_sid(p, sid);
p = ngx_spdy_frame_aligned_write_uint32(p, status);
buf->last = p;
ngx_http_spdy_queue_frame(sc, frame);
return NGX_OK;
}
#if 0
static ngx_int_t
ngx_http_spdy_send_goaway(ngx_http_spdy_connection_t *sc)
{
u_char *p;
ngx_buf_t *buf;
ngx_http_spdy_out_frame_t *frame;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy create GOAWAY sid:%ui", sc->last_sid);
frame = ngx_http_spdy_get_ctl_frame(sc, NGX_SPDY_GOAWAY_SIZE,
NGX_SPDY_HIGHEST_PRIORITY);
if (frame == NULL) {
return NGX_ERROR;
}
buf = frame->first->buf;
p = buf->pos;
p = ngx_spdy_frame_write_head(p, NGX_SPDY_GOAWAY);
p = ngx_spdy_frame_write_flags_and_len(p, 0, NGX_SPDY_GOAWAY_SIZE);
p = ngx_spdy_frame_write_sid(p, sc->last_sid);
buf->last = p;
ngx_http_spdy_queue_frame(sc, frame);
return NGX_OK;
}
#endif
static ngx_int_t
ngx_http_spdy_send_settings(ngx_http_spdy_connection_t *sc)
{
u_char *p;
ngx_buf_t *buf;
ngx_chain_t *cl;
ngx_http_spdy_srv_conf_t *sscf;
ngx_http_spdy_out_frame_t *frame;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy create SETTINGS frame");
frame = ngx_palloc(sc->pool, sizeof(ngx_http_spdy_out_frame_t));
if (frame == NULL) {
return NGX_ERROR;
}
cl = ngx_alloc_chain_link(sc->pool);
if (cl == NULL) {
return NGX_ERROR;
}
buf = ngx_create_temp_buf(sc->pool, NGX_SPDY_FRAME_HEADER_SIZE
+ NGX_SPDY_SETTINGS_NUM_SIZE
+ 2 * NGX_SPDY_SETTINGS_PAIR_SIZE);
if (buf == NULL) {
return NGX_ERROR;
}
buf->last_buf = 1;
cl->buf = buf;
cl->next = NULL;
frame->first = cl;
frame->last = cl;
frame->handler = ngx_http_spdy_settings_frame_handler;
frame->stream = NULL;
#if (NGX_DEBUG)
frame->length = NGX_SPDY_SETTINGS_NUM_SIZE
+ 2 * NGX_SPDY_SETTINGS_PAIR_SIZE;
#endif
frame->priority = NGX_SPDY_HIGHEST_PRIORITY;
frame->blocked = 0;
p = buf->pos;
p = ngx_spdy_frame_write_head(p, NGX_SPDY_SETTINGS);
p = ngx_spdy_frame_write_flags_and_len(p, NGX_SPDY_FLAG_CLEAR_SETTINGS,
NGX_SPDY_SETTINGS_NUM_SIZE
+ 2 * NGX_SPDY_SETTINGS_PAIR_SIZE);
p = ngx_spdy_frame_aligned_write_uint32(p, 2);
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
p = ngx_spdy_frame_write_flags_and_id(p, 0, NGX_SPDY_SETTINGS_MAX_STREAMS);
p = ngx_spdy_frame_aligned_write_uint32(p, sscf->concurrent_streams);
p = ngx_spdy_frame_write_flags_and_id(p, 0, NGX_SPDY_SETTINGS_INIT_WINDOW);
p = ngx_spdy_frame_aligned_write_uint32(p, NGX_SPDY_STREAM_WINDOW);
buf->last = p;
ngx_http_spdy_queue_frame(sc, frame);
return NGX_OK;
}
ngx_int_t
ngx_http_spdy_settings_frame_handler(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_out_frame_t *frame)
{
ngx_buf_t *buf;
buf = frame->first->buf;
if (buf->pos != buf->last) {
return NGX_AGAIN;
}
ngx_free_chain(sc->pool, frame->first);
return NGX_OK;
}
static ngx_http_spdy_out_frame_t *
ngx_http_spdy_get_ctl_frame(ngx_http_spdy_connection_t *sc, size_t length,
ngx_uint_t priority)
{
ngx_chain_t *cl;
ngx_http_spdy_out_frame_t *frame;
frame = sc->free_ctl_frames;
if (frame) {
sc->free_ctl_frames = frame->next;
cl = frame->first;
cl->buf->pos = cl->buf->start;
} else {
frame = ngx_palloc(sc->pool, sizeof(ngx_http_spdy_out_frame_t));
if (frame == NULL) {
return NULL;
}
cl = ngx_alloc_chain_link(sc->pool);
if (cl == NULL) {
return NULL;
}
cl->buf = ngx_create_temp_buf(sc->pool,
NGX_SPDY_CTL_FRAME_BUFFER_SIZE);
if (cl->buf == NULL) {
return NULL;
}
cl->buf->last_buf = 1;
frame->first = cl;
frame->last = cl;
frame->handler = ngx_http_spdy_ctl_frame_handler;
frame->stream = NULL;
}
#if (NGX_DEBUG)
if (length > NGX_SPDY_CTL_FRAME_BUFFER_SIZE - NGX_SPDY_FRAME_HEADER_SIZE) {
ngx_log_error(NGX_LOG_ALERT, sc->pool->log, 0,
"requested control frame is too big: %uz", length);
return NULL;
}
frame->length = length;
#endif
frame->priority = priority;
frame->blocked = 0;
return frame;
}
static ngx_int_t
ngx_http_spdy_ctl_frame_handler(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_out_frame_t *frame)
{
ngx_buf_t *buf;
buf = frame->first->buf;
if (buf->pos != buf->last) {
return NGX_AGAIN;
}
frame->next = sc->free_ctl_frames;
sc->free_ctl_frames = frame;
return NGX_OK;
}
static ngx_http_spdy_stream_t *
ngx_http_spdy_create_stream(ngx_http_spdy_connection_t *sc, ngx_uint_t id,
ngx_uint_t priority)
{
ngx_log_t *log;
ngx_uint_t index;
ngx_event_t *rev, *wev;
ngx_connection_t *fc;
ngx_http_log_ctx_t *ctx;
ngx_http_request_t *r;
ngx_http_spdy_stream_t *stream;
ngx_http_core_srv_conf_t *cscf;
ngx_http_spdy_srv_conf_t *sscf;
fc = sc->free_fake_connections;
if (fc) {
sc->free_fake_connections = fc->data;
rev = fc->read;
wev = fc->write;
log = fc->log;
ctx = log->data;
} else {
fc = ngx_palloc(sc->pool, sizeof(ngx_connection_t));
if (fc == NULL) {
return NULL;
}
rev = ngx_palloc(sc->pool, sizeof(ngx_event_t));
if (rev == NULL) {
return NULL;
}
wev = ngx_palloc(sc->pool, sizeof(ngx_event_t));
if (wev == NULL) {
return NULL;
}
log = ngx_palloc(sc->pool, sizeof(ngx_log_t));
if (log == NULL) {
return NULL;
}
ctx = ngx_palloc(sc->pool, sizeof(ngx_http_log_ctx_t));
if (ctx == NULL) {
return NULL;
}
ctx->connection = fc;
ctx->request = NULL;
}
ngx_memcpy(log, sc->connection->log, sizeof(ngx_log_t));
log->data = ctx;
ngx_memzero(rev, sizeof(ngx_event_t));
rev->data = fc;
rev->ready = 1;
rev->handler = ngx_http_spdy_close_stream_handler;
rev->log = log;
ngx_memcpy(wev, rev, sizeof(ngx_event_t));
wev->write = 1;
ngx_memcpy(fc, sc->connection, sizeof(ngx_connection_t));
fc->data = sc->http_connection;
fc->read = rev;
fc->write = wev;
fc->sent = 0;
fc->log = log;
fc->buffered = 0;
fc->sndlowat = 1;
fc->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
r = ngx_http_create_request(fc);
if (r == NULL) {
return NULL;
}
r->valid_location = 1;
fc->data = r;
sc->connection->requests++;
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
r->header_in = ngx_create_temp_buf(r->pool,
cscf->client_header_buffer_size);
if (r->header_in == NULL) {
ngx_http_free_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NULL;
}
r->headers_in.connection_type = NGX_HTTP_CONNECTION_CLOSE;
stream = ngx_pcalloc(r->pool, sizeof(ngx_http_spdy_stream_t));
if (stream == NULL) {
ngx_http_free_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NULL;
}
r->spdy_stream = stream;
stream->id = id;
stream->request = r;
stream->connection = sc;
stream->send_window = sc->init_window;
stream->recv_window = NGX_SPDY_STREAM_WINDOW;
stream->priority = priority;
sscf = ngx_http_get_module_srv_conf(r, ngx_http_spdy_module);
index = ngx_http_spdy_stream_index(sscf, id);
stream->index = sc->streams_index[index];
sc->streams_index[index] = stream;
sc->processing++;
return stream;
}
static ngx_http_spdy_stream_t *
ngx_http_spdy_get_stream_by_id(ngx_http_spdy_connection_t *sc,
ngx_uint_t sid)
{
ngx_http_spdy_stream_t *stream;
ngx_http_spdy_srv_conf_t *sscf;
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
stream = sc->streams_index[ngx_http_spdy_stream_index(sscf, sid)];
while (stream) {
if (stream->id == sid) {
return stream;
}
stream = stream->index;
}
return NULL;
}
static ngx_int_t
ngx_http_spdy_parse_header(ngx_http_request_t *r)
{
u_char *p, *end, ch;
ngx_uint_t hash;
ngx_http_core_srv_conf_t *cscf;
enum {
sw_name_len = 0,
sw_name,
sw_value_len,
sw_value
} state;
state = r->state;
p = r->header_in->pos;
end = r->header_in->last;
switch (state) {
case sw_name_len:
if (end - p < NGX_SPDY_NV_NLEN_SIZE) {
return NGX_AGAIN;
}
r->lowcase_index = ngx_spdy_frame_parse_uint32(p);
if (r->lowcase_index == 0) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
/* null-terminate the previous header value */
*p = '\0';
p += NGX_SPDY_NV_NLEN_SIZE;
r->invalid_header = 0;
state = sw_name;
/* fall through */
case sw_name:
if ((ngx_uint_t) (end - p) < r->lowcase_index) {
break;
}
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
r->header_name_start = p;
r->header_name_end = p + r->lowcase_index;
if (p[0] == ':') {
p++;
}
hash = 0;
for ( /* void */ ; p != r->header_name_end; p++) {
ch = *p;
hash = ngx_hash(hash, ch);
if ((ch >= 'a' && ch <= 'z')
|| (ch == '-')
|| (ch >= '0' && ch <= '9')
|| (ch == '_' && cscf->underscores_in_headers))
{
continue;
}
switch (ch) {
case '\0':
case LF:
case CR:
case ':':
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
if (ch >= 'A' && ch <= 'Z') {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
r->invalid_header = 1;
}
r->header_hash = hash;
state = sw_value_len;
/* fall through */
case sw_value_len:
if (end - p < NGX_SPDY_NV_VLEN_SIZE) {
break;
}
r->lowcase_index = ngx_spdy_frame_parse_uint32(p);
/* null-terminate header name */
*p = '\0';
p += NGX_SPDY_NV_VLEN_SIZE;
state = sw_value;
/* fall through */
case sw_value:
if ((ngx_uint_t) (end - p) < r->lowcase_index) {
break;
}
r->header_start = p;
while (r->lowcase_index--) {
ch = *p;
if (ch == '\0') {
if (p == r->header_start) {
return NGX_ERROR;
}
r->header_end = p;
r->header_in->pos = p + 1;
return NGX_OK;
}
if (ch == CR || ch == LF) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
p++;
}
r->header_end = p;
r->header_in->pos = p;
r->state = 0;
return NGX_DONE;
}
r->header_in->pos = p;
r->state = state;
return NGX_AGAIN;
}
static ngx_int_t
ngx_http_spdy_alloc_large_header_buffer(ngx_http_request_t *r)
{
u_char *old, *new;
size_t rest;
ngx_buf_t *buf;
ngx_http_spdy_stream_t *stream;
ngx_http_core_srv_conf_t *cscf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy alloc large header buffer");
stream = r->spdy_stream;
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
if (stream->header_buffers
== (ngx_uint_t) cscf->large_client_header_buffers.num)
{
return NGX_DECLINED;
}
rest = r->header_in->last - r->header_in->pos;
if (rest >= cscf->large_client_header_buffers.size) {
return NGX_DECLINED;
}
buf = ngx_create_temp_buf(r->pool, cscf->large_client_header_buffers.size);
if (buf == NULL) {
return NGX_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy large header alloc: %p %z",
buf->pos, buf->end - buf->last);
old = r->header_in->pos;
new = buf->pos;
if (rest) {
buf->last = ngx_cpymem(new, old, rest);
}
r->header_in = buf;
stream->header_buffers++;
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_handle_request_header(ngx_http_request_t *r)
{
ngx_uint_t i;
ngx_table_elt_t *h;
ngx_http_core_srv_conf_t *cscf;
ngx_http_spdy_request_header_t *sh;
if (r->invalid_header) {
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
if (cscf->ignore_invalid_headers) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent invalid header: \"%*s\"",
r->header_end - r->header_name_start,
r->header_name_start);
return NGX_OK;
}
}
if (r->header_name_start[0] == ':') {
r->header_name_start++;
for (i = 0; i < NGX_SPDY_REQUEST_HEADERS; i++) {
sh = &ngx_http_spdy_request_headers[i];
if (sh->hash != r->header_hash
|| sh->len != r->header_name_end - r->header_name_start
|| ngx_strncmp(sh->header, r->header_name_start, sh->len) != 0)
{
continue;
}
return sh->handler(r);
}
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
h = ngx_list_push(&r->headers_in.headers);
if (h == NULL) {
ngx_http_spdy_close_stream(r->spdy_stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
h->hash = r->header_hash;
h->key.len = r->header_name_end - r->header_name_start;
h->key.data = r->header_name_start;
h->value.len = r->header_end - r->header_start;
h->value.data = r->header_start;
h->lowcase_key = h->key.data;
return NGX_OK;
}
void
ngx_http_spdy_request_headers_init(void)
{
ngx_uint_t i;
ngx_http_spdy_request_header_t *h;
for (i = 0; i < NGX_SPDY_REQUEST_HEADERS; i++) {
h = &ngx_http_spdy_request_headers[i];
h->hash = ngx_hash_key(h->header, h->len);
}
}
static ngx_int_t
ngx_http_spdy_parse_method(ngx_http_request_t *r)
{
size_t k, len;
ngx_uint_t n;
const u_char *p, *m;
/*
* This array takes less than 256 sequential bytes,
* and if typical CPU cache line size is 64 bytes,
* it is prefetched for 4 load operations.
*/
static const struct {
u_char len;
const u_char method[11];
uint32_t value;
} tests[] = {
{ 3, "GET", NGX_HTTP_GET },
{ 4, "POST", NGX_HTTP_POST },
{ 4, "HEAD", NGX_HTTP_HEAD },
{ 7, "OPTIONS", NGX_HTTP_OPTIONS },
{ 8, "PROPFIND", NGX_HTTP_PROPFIND },
{ 3, "PUT", NGX_HTTP_PUT },
{ 5, "MKCOL", NGX_HTTP_MKCOL },
{ 6, "DELETE", NGX_HTTP_DELETE },
{ 4, "COPY", NGX_HTTP_COPY },
{ 4, "MOVE", NGX_HTTP_MOVE },
{ 9, "PROPPATCH", NGX_HTTP_PROPPATCH },
{ 4, "LOCK", NGX_HTTP_LOCK },
{ 6, "UNLOCK", NGX_HTTP_UNLOCK },
{ 5, "PATCH", NGX_HTTP_PATCH },
{ 5, "TRACE", NGX_HTTP_TRACE }
}, *test;
if (r->method_name.len) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
len = r->header_end - r->header_start;
r->method_name.len = len;
r->method_name.data = r->header_start;
test = tests;
n = sizeof(tests) / sizeof(tests[0]);
do {
if (len == test->len) {
p = r->method_name.data;
m = test->method;
k = len;
do {
if (*p++ != *m++) {
goto next;
}
} while (--k);
r->method = test->value;
return NGX_OK;
}
next:
test++;
} while (--n);
p = r->method_name.data;
do {
if ((*p < 'A' || *p > 'Z') && *p != '_') {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client sent invalid method");
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
p++;
} while (--len);
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_parse_scheme(ngx_http_request_t *r)
{
if (r->schema_start) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
r->schema_start = r->header_start;
r->schema_end = r->header_end;
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_parse_host(ngx_http_request_t *r)
{
ngx_table_elt_t *h;
if (r->headers_in.host) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
h = ngx_list_push(&r->headers_in.headers);
if (h == NULL) {
ngx_http_spdy_close_stream(r->spdy_stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
r->headers_in.host = h;
h->hash = r->header_hash;
h->key.len = r->header_name_end - r->header_name_start;
h->key.data = r->header_name_start;
h->value.len = r->header_end - r->header_start;
h->value.data = r->header_start;
h->lowcase_key = h->key.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_parse_path(ngx_http_request_t *r)
{
if (r->unparsed_uri.len) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
r->uri_start = r->header_start;
r->uri_end = r->header_end;
if (ngx_http_parse_uri(r) != NGX_OK) {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
if (ngx_http_process_request_uri(r) != NGX_OK) {
return NGX_ERROR;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_parse_version(ngx_http_request_t *r)
{
u_char *p, ch;
if (r->http_protocol.len) {
return NGX_HTTP_PARSE_INVALID_HEADER;
}
p = r->header_start;
if (r->header_end - p < 8 || !(ngx_str5cmp(p, 'H', 'T', 'T', 'P', '/'))) {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
ch = *(p + 5);
if (ch < '1' || ch > '9') {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
r->http_major = ch - '0';
for (p += 6; p != r->header_end - 2; p++) {
ch = *p;
if (ch == '.') {
break;
}
if (ch < '0' || ch > '9') {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
r->http_major = r->http_major * 10 + ch - '0';
}
if (*p != '.') {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
ch = *(p + 1);
if (ch < '0' || ch > '9') {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
r->http_minor = ch - '0';
for (p += 2; p != r->header_end; p++) {
ch = *p;
if (ch < '0' || ch > '9') {
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
r->http_minor = r->http_minor * 10 + ch - '0';
}
r->http_protocol.len = r->header_end - r->header_start;
r->http_protocol.data = r->header_start;
r->http_version = r->http_major * 1000 + r->http_minor;
return NGX_OK;
}
static ngx_int_t
ngx_http_spdy_construct_request_line(ngx_http_request_t *r)
{
u_char *p;
if (r->method_name.len == 0
|| r->unparsed_uri.len == 0
|| r->http_protocol.len == 0)
{
ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
return NGX_ERROR;
}
r->request_line.len = r->method_name.len + 1
+ r->unparsed_uri.len + 1
+ r->http_protocol.len;
p = ngx_pnalloc(r->pool, r->request_line.len + 1);
if (p == NULL) {
ngx_http_spdy_close_stream(r->spdy_stream,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
r->request_line.data = p;
p = ngx_cpymem(p, r->method_name.data, r->method_name.len);
*p++ = ' ';
p = ngx_cpymem(p, r->unparsed_uri.data, r->unparsed_uri.len);
*p++ = ' ';
ngx_memcpy(p, r->http_protocol.data, r->http_protocol.len + 1);
/* some modules expect the space character after method name */
r->method_name.data = r->request_line.data;
return NGX_OK;
}
static void
ngx_http_spdy_run_request(ngx_http_request_t *r)
{
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *h;
ngx_http_header_t *hh;
ngx_http_core_main_conf_t *cmcf;
if (ngx_http_spdy_construct_request_line(r) != NGX_OK) {
return;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy http request line: \"%V\"", &r->request_line);
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
part = &r->headers_in.headers.part;
h = part->elts;
for (i = 0 ;; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
h = part->elts;
i = 0;
}
hh = ngx_hash_find(&cmcf->headers_in_hash, h[i].hash,
h[i].lowcase_key, h[i].key.len);
if (hh && hh->handler(r, &h[i], hh->offset) != NGX_OK) {
return;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http header: \"%V: %V\"", &h[i].key, &h[i].value);
}
r->http_state = NGX_HTTP_PROCESS_REQUEST_STATE;
if (ngx_http_process_request_header(r) != NGX_OK) {
return;
}
if (r->headers_in.content_length_n > 0 && r->spdy_stream->in_closed) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"client prematurely closed stream");
r->spdy_stream->skip_data = NGX_SPDY_DATA_ERROR;
ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
return;
}
ngx_http_process_request(r);
}
static ngx_int_t
ngx_http_spdy_init_request_body(ngx_http_request_t *r)
{
ngx_buf_t *buf;
ngx_temp_file_t *tf;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
return NGX_ERROR;
}
r->request_body = rb;
if (r->spdy_stream->in_closed) {
return NGX_OK;
}
rb->rest = r->headers_in.content_length_n;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (r->request_body_in_file_only
|| rb->rest > (off_t) clcf->client_body_buffer_size
|| rb->rest < 0)
{
tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
if (tf == NULL) {
return NGX_ERROR;
}
tf->file.fd = NGX_INVALID_FILE;
tf->file.log = r->connection->log;
tf->path = clcf->client_body_temp_path;
tf->pool = r->pool;
tf->warn = "a client request body is buffered to a temporary file";
tf->log_level = r->request_body_file_log_level;
tf->persistent = r->request_body_in_persistent_file;
tf->clean = r->request_body_in_clean_file;
if (r->request_body_file_group_access) {
tf->access = 0660;
}
rb->temp_file = tf;
if (r->spdy_stream->in_closed
&& ngx_create_temp_file(&tf->file, tf->path, tf->pool,
tf->persistent, tf->clean, tf->access)
!= NGX_OK)
{
return NGX_ERROR;
}
buf = ngx_calloc_buf(r->pool);
if (buf == NULL) {
return NGX_ERROR;
}
} else {
if (rb->rest == 0) {
return NGX_OK;
}
buf = ngx_create_temp_buf(r->pool, (size_t) rb->rest);
if (buf == NULL) {
return NGX_ERROR;
}
}
rb->buf = buf;
rb->bufs = ngx_alloc_chain_link(r->pool);
if (rb->bufs == NULL) {
return NGX_ERROR;
}
rb->bufs->buf = buf;
rb->bufs->next = NULL;
rb->rest = 0;
return NGX_OK;
}
ngx_int_t
ngx_http_spdy_read_request_body(ngx_http_request_t *r,
ngx_http_client_body_handler_pt post_handler)
{
ngx_http_spdy_stream_t *stream;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy read request body");
stream = r->spdy_stream;
switch (stream->skip_data) {
case NGX_SPDY_DATA_DISCARD:
post_handler(r);
return NGX_OK;
case NGX_SPDY_DATA_ERROR:
if (r->headers_in.content_length_n == -1) {
return NGX_HTTP_REQUEST_ENTITY_TOO_LARGE;
} else {
return NGX_HTTP_BAD_REQUEST;
}
case NGX_SPDY_DATA_INTERNAL_ERROR:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (!r->request_body && ngx_http_spdy_init_request_body(r) != NGX_OK) {
stream->skip_data = NGX_SPDY_DATA_INTERNAL_ERROR;
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (stream->in_closed) {
post_handler(r);
return NGX_OK;
}
r->request_body->post_handler = post_handler;
r->read_event_handler = ngx_http_test_reading;
r->write_event_handler = ngx_http_request_empty_handler;
return NGX_AGAIN;
}
static ngx_int_t
ngx_http_spdy_terminate_stream(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_stream_t *stream, ngx_uint_t status)
{
ngx_event_t *rev;
ngx_connection_t *fc;
if (ngx_http_spdy_send_rst_stream(sc, stream->id, status,
NGX_SPDY_HIGHEST_PRIORITY)
== NGX_ERROR)
{
return NGX_ERROR;
}
stream->out_closed = 1;
fc = stream->request->connection;
fc->error = 1;
rev = fc->read;
rev->handler(rev);
return NGX_OK;
}
static void
ngx_http_spdy_close_stream_handler(ngx_event_t *ev)
{
ngx_connection_t *fc;
ngx_http_request_t *r;
fc = ev->data;
r = fc->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"spdy close stream handler");
ngx_http_spdy_close_stream(r->spdy_stream, 0);
}
void
ngx_http_spdy_close_stream(ngx_http_spdy_stream_t *stream, ngx_int_t rc)
{
ngx_event_t *ev;
ngx_connection_t *fc;
ngx_http_spdy_stream_t **index, *s;
ngx_http_spdy_srv_conf_t *sscf;
ngx_http_spdy_connection_t *sc;
sc = stream->connection;
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy close stream %ui, queued %ui, processing %ui",
stream->id, stream->queued, sc->processing);
fc = stream->request->connection;
if (stream->queued) {
fc->write->handler = ngx_http_spdy_close_stream_handler;
return;
}
if (!stream->out_closed) {
if (ngx_http_spdy_send_rst_stream(sc, stream->id,
NGX_SPDY_INTERNAL_ERROR,
stream->priority)
!= NGX_OK)
{
sc->connection->error = 1;
}
}
if (sc->stream == stream) {
sc->stream = NULL;
}
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
index = sc->streams_index + ngx_http_spdy_stream_index(sscf, stream->id);
for ( ;; ) {
s = *index;
if (s == NULL) {
break;
}
if (s == stream) {
*index = s->index;
break;
}
index = &s->index;
}
ngx_http_free_request(stream->request, rc);
ev = fc->read;
if (ev->active || ev->disabled) {
ngx_log_error(NGX_LOG_ALERT, sc->connection->log, 0,
"spdy fake read event was activated");
}
if (ev->timer_set) {
ngx_del_timer(ev);
}
if (ev->prev) {
ngx_delete_posted_event(ev);
}
ev = fc->write;
if (ev->active || ev->disabled) {
ngx_log_error(NGX_LOG_ALERT, sc->connection->log, 0,
"spdy fake write event was activated");
}
if (ev->timer_set) {
ngx_del_timer(ev);
}
if (ev->prev) {
ngx_delete_posted_event(ev);
}
fc->data = sc->free_fake_connections;
sc->free_fake_connections = fc;
sc->processing--;
if (sc->processing || sc->blocked) {
return;
}
ev = sc->connection->read;
ev->handler = ngx_http_spdy_handle_connection_handler;
ngx_post_event(ev, &ngx_posted_events);
}
static void
ngx_http_spdy_handle_connection_handler(ngx_event_t *rev)
{
ngx_connection_t *c;
rev->handler = ngx_http_spdy_read_handler;
if (rev->ready) {
ngx_http_spdy_read_handler(rev);
return;
}
c = rev->data;
ngx_http_spdy_handle_connection(c->data);
}
static void
ngx_http_spdy_keepalive_handler(ngx_event_t *rev)
{
ngx_connection_t *c;
ngx_http_spdy_srv_conf_t *sscf;
ngx_http_spdy_connection_t *sc;
c = rev->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "spdy keepalive handler");
if (rev->timedout || c->close) {
ngx_http_close_connection(c);
return;
}
#if (NGX_HAVE_KQUEUE)
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
if (rev->pending_eof) {
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno,
"kevent() reported that client %V closed "
"keepalive connection", &c->addr_text);
#if (NGX_HTTP_SSL)
if (c->ssl) {
c->ssl->no_send_shutdown = 1;
}
#endif
ngx_http_close_connection(c);
return;
}
}
#endif
c->destroyed = 0;
c->idle = 0;
ngx_reusable_connection(c, 0);
sc = c->data;
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
sc->pool = ngx_create_pool(sscf->pool_size, sc->connection->log);
if (sc->pool == NULL) {
ngx_http_close_connection(c);
return;
}
sc->streams_index = ngx_pcalloc(sc->pool,
ngx_http_spdy_streams_index_size(sscf)
* sizeof(ngx_http_spdy_stream_t *));
if (sc->streams_index == NULL) {
ngx_http_close_connection(c);
return;
}
c->write->handler = ngx_http_spdy_write_handler;
rev->handler = ngx_http_spdy_read_handler;
ngx_http_spdy_read_handler(rev);
}
static void
ngx_http_spdy_finalize_connection(ngx_http_spdy_connection_t *sc,
ngx_int_t rc)
{
ngx_uint_t i, size;
ngx_event_t *ev;
ngx_connection_t *c, *fc;
ngx_http_request_t *r;
ngx_http_spdy_stream_t *stream;
ngx_http_spdy_srv_conf_t *sscf;
c = sc->connection;
if (!sc->processing) {
ngx_http_close_connection(c);
return;
}
c->error = 1;
c->read->handler = ngx_http_empty_handler;
c->write->handler = ngx_http_empty_handler;
sc->last_out = NULL;
sc->blocked = 1;
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
size = ngx_http_spdy_streams_index_size(sscf);
for (i = 0; i < size; i++) {
stream = sc->streams_index[i];
while (stream) {
stream->handled = 0;
r = stream->request;
fc = r->connection;
fc->error = 1;
if (stream->queued) {
stream->queued = 0;
ev = fc->write;
ev->delayed = 0;
} else {
ev = fc->read;
}
stream = stream->index;
ev->eof = 1;
ev->handler(ev);
}
}
sc->blocked = 0;
if (sc->processing) {
return;
}
ngx_http_close_connection(c);
}
static ngx_int_t
ngx_http_spdy_adjust_windows(ngx_http_spdy_connection_t *sc, ssize_t delta)
{
ngx_uint_t i, size;
ngx_event_t *wev;
ngx_http_spdy_stream_t *stream, *sn;
ngx_http_spdy_srv_conf_t *sscf;
sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
ngx_http_spdy_module);
size = ngx_http_spdy_streams_index_size(sscf);
for (i = 0; i < size; i++) {
for (stream = sc->streams_index[i]; stream; stream = sn) {
sn = stream->index;
if (delta > 0
&& stream->send_window
> (ssize_t) (NGX_SPDY_MAX_WINDOW - delta))
{
if (ngx_http_spdy_terminate_stream(sc, stream,
NGX_SPDY_FLOW_CONTROL_ERROR)
== NGX_ERROR)
{
return NGX_ERROR;
}
continue;
}
stream->send_window += delta;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy:%ui adjust window:%z",
stream->id, stream->send_window);
if (stream->send_window > 0 && stream->exhausted) {
stream->exhausted = 0;
wev = stream->request->connection->write;
if (!wev->timer_set) {
wev->delayed = 0;
wev->handler(wev);
}
}
}
}
return NGX_OK;
}
static void
ngx_http_spdy_pool_cleanup(void *data)
{
ngx_http_spdy_connection_t *sc = data;
if (sc->pool) {
ngx_destroy_pool(sc->pool);
}
}
static void *
ngx_http_spdy_zalloc(void *opaque, u_int items, u_int size)
{
ngx_http_spdy_connection_t *sc = opaque;
return ngx_palloc(sc->connection->pool, items * size);
}
static void
ngx_http_spdy_zfree(void *opaque, void *address)
{
#if 0
ngx_http_spdy_connection_t *sc = opaque;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
"spdy zfree: %p", address);
#endif
}
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