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/*
* Copyright (C) Nginx, Inc.
* Copyright (C) Valentin V. Bartenev
*/
#ifndef _NGX_HTTP_SPDY_H_INCLUDED_
#define _NGX_HTTP_SPDY_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <zlib.h>
#define NGX_SPDY_VERSION 2
#ifdef TLSEXT_TYPE_next_proto_neg
#define NGX_SPDY_NPN_ADVERTISE "\x06spdy/2"
#define NGX_SPDY_NPN_NEGOTIATED "spdy/2"
#endif
#define NGX_SPDY_STATE_BUFFER_SIZE 16
#define NGX_SPDY_CTL_BIT 1
#define NGX_SPDY_SYN_STREAM 1
#define NGX_SPDY_SYN_REPLY 2
#define NGX_SPDY_RST_STREAM 3
#define NGX_SPDY_SETTINGS 4
#define NGX_SPDY_NOOP 5
#define NGX_SPDY_PING 6
#define NGX_SPDY_GOAWAY 7
#define NGX_SPDY_HEADERS 8
#define NGX_SPDY_FRAME_HEADER_SIZE 8
#define NGX_SPDY_SID_SIZE 4
#define NGX_SPDY_SYN_STREAM_SIZE 10
#define NGX_SPDY_SYN_REPLY_SIZE 6
#define NGX_SPDY_RST_STREAM_SIZE 8
#define NGX_SPDY_PING_SIZE 4
#define NGX_SPDY_GOAWAY_SIZE 4
#define NGX_SPDY_NV_NUM_SIZE 2
#define NGX_SPDY_NV_NLEN_SIZE 2
#define NGX_SPDY_NV_VLEN_SIZE 2
#define NGX_SPDY_SETTINGS_NUM_SIZE 4
#define NGX_SPDY_SETTINGS_IDF_SIZE 4
#define NGX_SPDY_SETTINGS_VAL_SIZE 4
#define NGX_SPDY_SETTINGS_PAIR_SIZE \
(NGX_SPDY_SETTINGS_IDF_SIZE + NGX_SPDY_SETTINGS_VAL_SIZE)
#define NGX_SPDY_HIGHEST_PRIORITY 0
#define NGX_SPDY_LOWEST_PRIORITY 3
#define NGX_SPDY_FLAG_FIN 0x01
#define NGX_SPDY_FLAG_UNIDIRECTIONAL 0x02
#define NGX_SPDY_FLAG_CLEAR_SETTINGS 0x01
#define NGX_SPDY_MAX_FRAME_SIZE ((1 << 24) - 1)
#define NGX_SPDY_DATA_DISCARD 1
#define NGX_SPDY_DATA_ERROR 2
#define NGX_SPDY_DATA_INTERNAL_ERROR 3
typedef struct ngx_http_spdy_connection_s ngx_http_spdy_connection_t;
typedef struct ngx_http_spdy_out_frame_s ngx_http_spdy_out_frame_t;
typedef u_char *(*ngx_http_spdy_handler_pt) (ngx_http_spdy_connection_t *sc,
u_char *pos, u_char *end);
struct ngx_http_spdy_connection_s {
ngx_connection_t *connection;
ngx_http_connection_t *http_connection;
ngx_uint_t processing;
u_char buffer[NGX_SPDY_STATE_BUFFER_SIZE];
size_t buffer_used;
ngx_http_spdy_handler_pt handler;
z_stream zstream_in;
z_stream zstream_out;
ngx_pool_t *pool;
ngx_http_spdy_out_frame_t *free_ctl_frames;
ngx_connection_t *free_fake_connections;
ngx_http_spdy_stream_t **streams_index;
ngx_http_spdy_out_frame_t *last_out;
ngx_http_spdy_stream_t *last_stream;
ngx_http_spdy_stream_t *stream;
ngx_uint_t headers;
size_t length;
u_char flags;
ngx_uint_t last_sid;
unsigned blocked:2;
unsigned waiting:1; /* FIXME better name */
};
struct ngx_http_spdy_stream_s {
ngx_uint_t id;
ngx_http_request_t *request;
ngx_http_spdy_connection_t *connection;
ngx_http_spdy_stream_t *index;
ngx_http_spdy_stream_t *next;
ngx_uint_t header_buffers;
ngx_uint_t waiting;
ngx_http_spdy_out_frame_t *free_frames;
ngx_chain_t *free_data_headers;
unsigned priority:2;
unsigned handled:1;
unsigned in_closed:1;
unsigned out_closed:1;
unsigned skip_data:2;
};
struct ngx_http_spdy_out_frame_s {
ngx_http_spdy_out_frame_t *next;
ngx_chain_t *first;
ngx_chain_t *last;
ngx_int_t (*handler)(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_out_frame_t *frame);
ngx_http_spdy_out_frame_t *free;
ngx_http_spdy_stream_t *stream;
size_t size;
ngx_uint_t priority;
unsigned blocked:1;
unsigned fin:1;
};
static ngx_inline void
ngx_http_spdy_queue_frame(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_out_frame_t *frame)
{
ngx_http_spdy_out_frame_t **out;
for (out = &sc->last_out; *out; out = &(*out)->next)
{
if (frame->priority >= (*out)->priority) {
break;
}
}
frame->next = *out;
*out = frame;
}
static ngx_inline void
ngx_http_spdy_queue_blocked_frame(ngx_http_spdy_connection_t *sc,
ngx_http_spdy_out_frame_t *frame)
{
ngx_http_spdy_out_frame_t **out;
for (out = &sc->last_out; *out; out = &(*out)->next)
{
if ((*out)->blocked) {
break;
}
}
frame->next = *out;
*out = frame;
}
void ngx_http_spdy_init(ngx_event_t *rev);
void ngx_http_spdy_request_headers_init(void);
ngx_int_t ngx_http_spdy_read_request_body(ngx_http_request_t *r,
ngx_http_client_body_handler_pt post_handler);
void ngx_http_spdy_close_stream(ngx_http_spdy_stream_t *stream, ngx_int_t rc);
ngx_int_t ngx_http_spdy_send_output_queue(ngx_http_spdy_connection_t *sc);
#define ngx_spdy_frame_aligned_write_uint16(p, s) \
(*(uint16_t *) (p) = htons((uint16_t) (s)), (p) + sizeof(uint16_t))
#define ngx_spdy_frame_aligned_write_uint32(p, s) \
(*(uint32_t *) (p) = htonl((uint32_t) (s)), (p) + sizeof(uint32_t))
#if (NGX_HAVE_NONALIGNED)
#define ngx_spdy_frame_write_uint16 ngx_spdy_frame_aligned_write_uint16
#define ngx_spdy_frame_write_uint32 ngx_spdy_frame_aligned_write_uint32
#else
#define ngx_spdy_frame_write_uint16(p, s) \
((p)[0] = (u_char) (s) >> 8, (p)[1] = (u_char) (s), (p) + sizeof(uint16_t))
#define ngx_spdy_frame_write_uint32(p, s) \
((p)[0] = (u_char) (s) >> 24, \
(p)[1] = (u_char) (s) >> 16, \
(p)[2] = (u_char) (s) >> 8, \
(p)[3] = (u_char) (s), (p) + sizeof(uint32_t))
#endif
#define ngx_spdy_ctl_frame_head(t) \
((uint32_t) NGX_SPDY_CTL_BIT << 31 | NGX_SPDY_VERSION << 16 | (t))
#define ngx_spdy_frame_write_head(p, t) \
ngx_spdy_frame_aligned_write_uint32(p, ngx_spdy_ctl_frame_head(t))
#define ngx_spdy_frame_write_flags_and_len(p, f, l) \
ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (l))
#define ngx_spdy_frame_write_sid ngx_spdy_frame_aligned_write_uint32
#endif /* _NGX_HTTP_SPDY_H_INCLUDED_ */
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