186 lines
6.5 KiB
C
186 lines
6.5 KiB
C
/*
|
|
* nghttp2 - HTTP/2.0 C Library
|
|
*
|
|
* Copyright (c) 2012 Tatsuhiro Tsujikawa
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#ifndef NGHTTP2_STREAM_H
|
|
#define NGHTTP2_STREAM_H
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif /* HAVE_CONFIG_H */
|
|
|
|
#include <nghttp2/nghttp2.h>
|
|
#include "nghttp2_outbound_item.h"
|
|
#include "nghttp2_map.h"
|
|
|
|
/*
|
|
* If local peer is stream initiator:
|
|
* NGHTTP2_STREAM_OPENING : upon sending SYN_STREAM
|
|
* NGHTTP2_STREAM_OPENED : upon receiving SYN_REPLY
|
|
* NGHTTP2_STREAM_CLOSING : upon queuing RST_STREAM
|
|
*
|
|
* If remote peer is stream initiator:
|
|
* NGHTTP2_STREAM_OPENING : upon receiving SYN_STREAM
|
|
* NGHTTP2_STREAM_OPENED : upon sending SYN_REPLY
|
|
* NGHTTP2_STREAM_CLOSING : upon queuing RST_STREAM
|
|
*/
|
|
typedef enum {
|
|
/* Initial state */
|
|
NGHTTP2_STREAM_INITIAL,
|
|
/* For stream initiator: SYN_STREAM has been sent, but SYN_REPLY is
|
|
not received yet. For receiver: SYN_STREAM has been received,
|
|
but it does not send SYN_REPLY yet. */
|
|
NGHTTP2_STREAM_OPENING,
|
|
/* For stream initiator: SYN_REPLY is received. For receiver:
|
|
SYN_REPLY is sent. */
|
|
NGHTTP2_STREAM_OPENED,
|
|
/* RST_STREAM is received, but somehow we need to keep stream in
|
|
memory. */
|
|
NGHTTP2_STREAM_CLOSING,
|
|
/* PUSH_PROMISE is received or sent */
|
|
NGHTTP2_STREAM_RESERVED
|
|
} nghttp2_stream_state;
|
|
|
|
typedef enum {
|
|
NGHTTP2_SHUT_NONE = 0,
|
|
/* Indicates further receptions will be disallowed. */
|
|
NGHTTP2_SHUT_RD = 0x01,
|
|
/* Indicates further transmissions will be disallowed. */
|
|
NGHTTP2_SHUT_WR = 0x02,
|
|
/* Indicates both further receptions and transmissions will be
|
|
disallowed. */
|
|
NGHTTP2_SHUT_RDWR = NGHTTP2_SHUT_RD | NGHTTP2_SHUT_WR
|
|
} nghttp2_shut_flag;
|
|
|
|
typedef enum {
|
|
NGHTTP2_STREAM_FLAG_NONE = 0,
|
|
/* Indicates that this stream is pushed stream */
|
|
NGHTTP2_STREAM_FLAG_PUSH = 0x01
|
|
} nghttp2_stream_flag;
|
|
|
|
typedef enum {
|
|
NGHTTP2_DEFERRED_NONE = 0,
|
|
/* Indicates the DATA is deferred due to flow control. */
|
|
NGHTTP2_DEFERRED_FLOW_CONTROL = 0x01
|
|
} nghttp2_deferred_flag;
|
|
|
|
typedef struct {
|
|
/* Intrusive Map */
|
|
nghttp2_map_entry map_entry;
|
|
/* The arbitrary data provided by user for this stream. */
|
|
void *stream_user_data;
|
|
/* Deferred DATA frame */
|
|
nghttp2_outbound_item *deferred_data;
|
|
/* stream ID */
|
|
int32_t stream_id;
|
|
/* Use same value in SYN_STREAM frame */
|
|
int32_t pri;
|
|
/* Current remote window size. This value is computed against the
|
|
current initial window size of remote endpoint. */
|
|
int32_t remote_window_size;
|
|
/* Keep track of the number of bytes received without
|
|
WINDOW_UPDATE. This could be negative after submitting negative
|
|
value to WINDOW_UPDATE */
|
|
int32_t recv_window_size;
|
|
/* The amount of recv_window_size cut using submitting negative
|
|
value to WINDOW_UPDATE */
|
|
int32_t recv_reduction;
|
|
/* window size for local flow control. It is initially set to
|
|
NGHTTP2_INITIAL_WINDOW_SIZE and could be increased/decreased by
|
|
submitting WINDOW_UPDATE. See nghttp2_submit_window_update(). */
|
|
int32_t local_window_size;
|
|
nghttp2_stream_state state;
|
|
/* This is bitwise-OR of 0 or more of nghttp2_stream_flag. */
|
|
uint8_t flags;
|
|
/* Bitwise OR of zero or more nghttp2_shut_flag values */
|
|
uint8_t shut_flags;
|
|
/* The flags for defered DATA. Bitwise OR of zero or more
|
|
nghttp2_deferred_flag values */
|
|
uint8_t deferred_flags;
|
|
} nghttp2_stream;
|
|
|
|
void nghttp2_stream_init(nghttp2_stream *stream, int32_t stream_id,
|
|
uint8_t flags, int32_t pri,
|
|
nghttp2_stream_state initial_state,
|
|
int32_t remote_initial_window_size,
|
|
int32_t local_initial_window_size,
|
|
void *stream_user_data);
|
|
|
|
void nghttp2_stream_free(nghttp2_stream *stream);
|
|
|
|
/*
|
|
* Disallow either further receptions or transmissions, or both.
|
|
* |flag| is bitwise OR of one or more of nghttp2_shut_flag.
|
|
*/
|
|
void nghttp2_stream_shutdown(nghttp2_stream *stream, nghttp2_shut_flag flag);
|
|
|
|
/*
|
|
* Defer DATA frame |data|. We won't call this function in the
|
|
* situation where stream->deferred_data != NULL. If |flags| is
|
|
* bitwise OR of zero or more nghttp2_deferred_flag values.
|
|
*/
|
|
void nghttp2_stream_defer_data(nghttp2_stream *stream,
|
|
nghttp2_outbound_item *data,
|
|
uint8_t flags);
|
|
|
|
/*
|
|
* Detaches deferred data from this stream. This function does not
|
|
* free deferred data.
|
|
*/
|
|
void nghttp2_stream_detach_deferred_data(nghttp2_stream *stream);
|
|
|
|
/*
|
|
* Updates the remote window size with the new value
|
|
* |new_initial_window_size|. The |old_initial_window_size| is used to
|
|
* calculate the current window size.
|
|
*
|
|
* This function returns 0 if it succeeds or -1. The failure is due to
|
|
* overflow.
|
|
*/
|
|
int nghttp2_stream_update_remote_initial_window_size
|
|
(nghttp2_stream *stream,
|
|
int32_t new_initial_window_size,
|
|
int32_t old_initial_window_size);
|
|
|
|
/*
|
|
* Updates the local window size with the new value
|
|
* |new_initial_window_size|. The |old_initial_window_size| is used to
|
|
* calculate the current window size.
|
|
*
|
|
* This function returns 0 if it succeeds or -1. The failure is due to
|
|
* overflow.
|
|
*/
|
|
int nghttp2_stream_update_local_initial_window_size
|
|
(nghttp2_stream *stream,
|
|
int32_t new_initial_window_size,
|
|
int32_t old_initial_window_size);
|
|
|
|
/*
|
|
* Call this function if promised stream |stream| is replied with
|
|
* HEADERS. This function makes the state of the |stream| to
|
|
* NGHTTP2_STREAM_OPENED.
|
|
*/
|
|
void nghttp2_stream_promise_fulfilled(nghttp2_stream *stream);
|
|
|
|
#endif /* NGHTTP2_STREAM */
|