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ngx_http_spdy.c
3647 lines (2693 loc) · 105 KB
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ngx_http_spdy.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_headers_error(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_inflate_error(
ngx_http_spdy_connection_t *sc, int rc);
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[] = {
0x00, 0x00, 0x00, 0x07, 0x6f, 0x70, 0x74, 0x69, /* - - - - o p t i */
0x6f, 0x6e, 0x73, 0x00, 0x00, 0x00, 0x04, 0x68, /* o n s - - - - h */
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 - - - - */
0x74, 0x72, 0x61, 0x63, 0x65, 0x00, 0x00, 0x00, /* t r a c e - - - */
0x06, 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x00, /* - a c c e p t - */
0x00, 0x00, 0x0e, 0x61, 0x63, 0x63, 0x65, 0x70, /* - - - a c c e p */
0x74, 0x2d, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65, /* t - c h a r s e */
0x74, 0x00, 0x00, 0x00, 0x0f, 0x61, 0x63, 0x63, /* t - - - - a c c */
0x65, 0x70, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f, /* e p t - e n c o */
0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x0f, /* d i n g - - - - */
0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d, 0x6c, /* a c c e p t - l */
0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x00, /* a n g u a g e - */
0x00, 0x00, 0x0d, 0x61, 0x63, 0x63, 0x65, 0x70, /* - - - a c c e p */
0x74, 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x73, /* t - r a n g e s */
0x00, 0x00, 0x00, 0x03, 0x61, 0x67, 0x65, 0x00, /* - - - - a g e - */
0x00, 0x00, 0x05, 0x61, 0x6c, 0x6c, 0x6f, 0x77, /* - - - a l l o w */
0x00, 0x00, 0x00, 0x0d, 0x61, 0x75, 0x74, 0x68, /* - - - - a u t h */
0x6f, 0x72, 0x69, 0x7a, 0x61, 0x74, 0x69, 0x6f, /* o r i z a t i o */
0x6e, 0x00, 0x00, 0x00, 0x0d, 0x63, 0x61, 0x63, /* n - - - - c a c */
0x68, 0x65, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, /* h e - c o n t r */
0x6f, 0x6c, 0x00, 0x00, 0x00, 0x0a, 0x63, 0x6f, /* o l - - - - c o */
0x6e, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, /* n n e c t i o n */
0x00, 0x00, 0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74, /* - - - - c o n t */
0x65, 0x6e, 0x74, 0x2d, 0x62, 0x61, 0x73, 0x65, /* e n t - b a s e */
0x00, 0x00, 0x00, 0x10, 0x63, 0x6f, 0x6e, 0x74, /* - - - - c o n t */
0x65, 0x6e, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f, /* e n t - e n c o */
0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x10, /* d i n g - - - - */
0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, /* c o n t e n t - */
0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, /* l a n g u a g e */
0x00, 0x00, 0x00, 0x0e, 0x63, 0x6f, 0x6e, 0x74, /* - - - - c o n t */
0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x65, 0x6e, 0x67, /* e n t - l e n g */
0x74, 0x68, 0x00, 0x00, 0x00, 0x10, 0x63, 0x6f, /* t h - - - - c o */
0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x6f, /* n t e n t - l o */
0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, /* c a t i o n - - */
0x00, 0x0b, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, /* - - c o n t e n */
0x74, 0x2d, 0x6d, 0x64, 0x35, 0x00, 0x00, 0x00, /* t - m d 5 - - - */
0x0d, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, /* - c o n t e n t */
0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00, /* - r a n g e - - */
0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, /* - - c o n t e n */
0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x00, 0x00, /* t - t y p e - - */
0x00, 0x04, 0x64, 0x61, 0x74, 0x65, 0x00, 0x00, /* - - d a t e - - */
0x00, 0x04, 0x65, 0x74, 0x61, 0x67, 0x00, 0x00, /* - - e t a g - - */
0x00, 0x06, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74, /* - - e x p e c t */
0x00, 0x00, 0x00, 0x07, 0x65, 0x78, 0x70, 0x69, /* - - - - e x p i */
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 */
0x66, 0x2d, 0x6d, 0x61, 0x74, 0x63, 0x68, 0x00, /* f - m a t c h - */
0x00, 0x00, 0x11, 0x69, 0x66, 0x2d, 0x6d, 0x6f, /* - - - i f - m o */
0x64, 0x69, 0x66, 0x69, 0x65, 0x64, 0x2d, 0x73, /* d i f i e d - s */
0x69, 0x6e, 0x63, 0x65, 0x00, 0x00, 0x00, 0x0d, /* i n c e - - - - */
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 - - - */
0x08, 0x69, 0x66, 0x2d, 0x72, 0x61, 0x6e, 0x67, /* - i f - r a n g */
0x65, 0x00, 0x00, 0x00, 0x13, 0x69, 0x66, 0x2d, /* e - - - - i f - */
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 */
0x00, 0x00, 0x00, 0x0d, 0x6c, 0x61, 0x73, 0x74, /* - - - - l a s t */
0x2d, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, 0x65, /* - m o d i f i e */
0x64, 0x00, 0x00, 0x00, 0x08, 0x6c, 0x6f, 0x63, /* d - - - - l o c */
0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, /* a t i o n - - - */
0x0c, 0x6d, 0x61, 0x78, 0x2d, 0x66, 0x6f, 0x72, /* - m a x - f o r */
0x77, 0x61, 0x72, 0x64, 0x73, 0x00, 0x00, 0x00, /* w a r d s - - - */
0x06, 0x70, 0x72, 0x61, 0x67, 0x6d, 0x61, 0x00, /* - p r a g m a - */
0x00, 0x00, 0x12, 0x70, 0x72, 0x6f, 0x78, 0x79, /* - - - p r o x y */
0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e, 0x74, /* - a u t h e n t */
0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00, 0x00, /* i c a t e - - - */
0x13, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2d, 0x61, /* - p r o x y - a */
0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x7a, 0x61, /* u t h o r i z a */
0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x05, /* t i o n - - - - */
0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00, 0x00, /* r a n g e - - - */
0x07, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x72, /* - r e f e r e r */
0x00, 0x00, 0x00, 0x0b, 0x72, 0x65, 0x74, 0x72, /* - - - - r e t r */
0x79, 0x2d, 0x61, 0x66, 0x74, 0x65, 0x72, 0x00, /* y - a f t e r - */
0x00, 0x00, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, /* - - - s e r v e */
0x72, 0x00, 0x00, 0x00, 0x02, 0x74, 0x65, 0x00, /* r - - - - t e - */
0x00, 0x00, 0x07, 0x74, 0x72, 0x61, 0x69, 0x6c, /* - - - t r a i l */
0x65, 0x72, 0x00, 0x00, 0x00, 0x11, 0x74, 0x72, /* e r - - - - t r */
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 - */
0x00, 0x00, 0x07, 0x75, 0x70, 0x67, 0x72, 0x61, /* - - - u p g r a */
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 */
0x00, 0x00, 0x00, 0x04, 0x76, 0x61, 0x72, 0x79, /* - - - - v a r y */
0x00, 0x00, 0x00, 0x03, 0x76, 0x69, 0x61, 0x00, /* - - - - v i a - */
0x00, 0x00, 0x07, 0x77, 0x61, 0x72, 0x6e, 0x69, /* - - - w a r n i */
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 = hc->proxy_protocol ? ngx_http_spdy_proxy_protocol
: ngx_http_spdy_state_head;
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 prematurely closed 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,
"run spdy 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)
{
ngx_log_t *log;
log = sc->connection->log;
log->action = "reading PROXY protocol";
pos = ngx_proxy_protocol_parse(sc->connection, pos, end);
log->action = "processing SPDY";
if (pos == NULL) {
return ngx_http_spdy_state_protocol_error(sc);
}
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,
"process spdy 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:
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent unexpected SYN_REPLY frame");
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:
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent unexpected HEADERS frame");
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);
}
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent invalid 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) {
ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
"client sent SYN_STREAM frame with incorrect length %uz",
sc->length);
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,
"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);