216 lines
7.0 KiB
C
216 lines
7.0 KiB
C
/*
|
|
* Spdylay - SPDY 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 SPDYLAY_SESSION_H
|
|
#define SPDYLAY_SESSION_H
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif /* HAVE_CONFIG_H */
|
|
|
|
#include <time.h>
|
|
|
|
#include <spdylay/spdylay.h>
|
|
#include "spdylay_pq.h"
|
|
#include "spdylay_map.h"
|
|
#include "spdylay_frame.h"
|
|
#include "spdylay_zlib.h"
|
|
#include "spdylay_stream.h"
|
|
|
|
typedef struct {
|
|
spdylay_frame_type frame_type;
|
|
spdylay_frame *frame;
|
|
int pri;
|
|
} spdylay_outbound_item;
|
|
|
|
typedef struct {
|
|
spdylay_outbound_item *item;
|
|
uint8_t *framebuf;
|
|
size_t framebuflen;
|
|
size_t framebufoff;
|
|
} spdylay_active_outbound_item;
|
|
|
|
typedef struct {
|
|
uint8_t buf[4096];
|
|
uint8_t *mark;
|
|
uint8_t *limit;
|
|
} spdylay_inbound_buffer;
|
|
|
|
typedef enum {
|
|
SPDYLAY_RECV_HEAD,
|
|
SPDYLAY_RECV_PAYLOAD
|
|
} spdylay_inbound_state;
|
|
|
|
#define SPDYLAY_HEAD_LEN 8
|
|
|
|
/* Maximum unique ID in use for PING. If unique ID exeeds this number,
|
|
it wraps to 1 (client) or 2 (server) */
|
|
#define SPDYLAY_MAX_UNIQUE_ID ((1u << 31)-1)
|
|
|
|
typedef struct {
|
|
spdylay_inbound_state state;
|
|
uint8_t headbuf[SPDYLAY_HEAD_LEN];
|
|
/* NULL if inbound frame is data frame */
|
|
uint8_t *buf;
|
|
/* length in Length field */
|
|
size_t len;
|
|
size_t off;
|
|
uint8_t ign;
|
|
} spdylay_inbound_frame;
|
|
|
|
typedef struct spdylay_session {
|
|
uint8_t server;
|
|
int32_t next_stream_id;
|
|
int32_t last_recv_stream_id;
|
|
/* Counter of unique ID of PING. Wraps when it exceeds
|
|
SPDYLAY_MAX_UNIQUE_ID */
|
|
uint32_t next_unique_id;
|
|
|
|
spdylay_map /* <spdylay_stream*> */ streams;
|
|
spdylay_pq /* <spdylay_outbound_item*> */ ob_pq;
|
|
|
|
spdylay_active_outbound_item aob;
|
|
|
|
spdylay_inbound_buffer ibuf;
|
|
spdylay_inbound_frame iframe;
|
|
|
|
spdylay_zlib hd_deflater;
|
|
spdylay_zlib hd_inflater;
|
|
|
|
/* The last unique ID sent to the peer. */
|
|
uint32_t last_ping_unique_id;
|
|
/* Time stamp when last ping is sent. */
|
|
struct timespec last_ping_time;
|
|
|
|
spdylay_session_callbacks callbacks;
|
|
void *user_data;
|
|
} spdylay_session;
|
|
|
|
/* TODO stream timeout etc */
|
|
|
|
int spdylay_session_add_frame(spdylay_session *session,
|
|
spdylay_frame_type frame_type,
|
|
spdylay_frame *frame);
|
|
|
|
int spdylay_session_add_rst_stream(spdylay_session *session,
|
|
int32_t stream_id, uint32_t status_code);
|
|
|
|
int spdylay_session_add_ping(spdylay_session *session, uint32_t unique_id);
|
|
|
|
/*
|
|
* Creates new stream in |session| with stream ID |stream_id|,
|
|
* priority |pri| and flags |flags|. Currently, |flags| &
|
|
* SPDYLAY_FLAG_UNIDIRECTIONAL is non-zero, this stream is
|
|
* unidirectional. |flags| & SPDYLAY_FLAG_FIN is non-zero, the sender
|
|
* of SYN_STREAM will not send any further data in this stream.
|
|
* The state of stream is set to |initial_state|.
|
|
*/
|
|
int spdylay_session_open_stream(spdylay_session *session, int32_t stream_id,
|
|
uint8_t flags, uint8_t pri,
|
|
spdylay_stream_state initial_state);
|
|
|
|
/*
|
|
* Closes stream whose stream ID is |stream_id|. This function returns
|
|
* 0 if it succeeds, or negative error code. The possible error code
|
|
* is SPDYLAY_ERR_INVALID_ARGUMENT, which is used when stream
|
|
* |stream_id| does not exist. So the caller may ignore this error.
|
|
*/
|
|
int spdylay_session_close_stream(spdylay_session *session, int32_t stream_id);
|
|
|
|
/*
|
|
* Called when SYN_STREAM is received. Received frame is |frame|.
|
|
* This function does first validate received frame and then open
|
|
* stream and call callback functions. This function returns 0 if it
|
|
* succeeds, or negative error code. This function does not return
|
|
* error if frame is not valid.
|
|
*/
|
|
int spdylay_session_on_syn_stream_received(spdylay_session *session,
|
|
spdylay_frame *frame);
|
|
|
|
/*
|
|
* Called when SYN_REPLY is received. Received frame is |frame|.
|
|
*/
|
|
int spdylay_session_on_syn_reply_received(spdylay_session *session,
|
|
spdylay_frame *frame);
|
|
|
|
|
|
/*
|
|
* Called when RST_STREAM is received. Received frame is |frame|.
|
|
*/
|
|
int spdylay_session_on_rst_stream_received(spdylay_session *session,
|
|
spdylay_frame *frame);
|
|
|
|
/*
|
|
* Called when PING is received. Received frame is |frame|.
|
|
*/
|
|
int spdylay_session_on_ping_received(spdylay_session *session,
|
|
spdylay_frame *frame);
|
|
|
|
/*
|
|
* Called when HEADERS is recieved. Received frame is |frame|.
|
|
*/
|
|
int spdylay_session_on_headers_received(spdylay_session *session,
|
|
spdylay_frame *frame);
|
|
|
|
/*
|
|
* Returns spdylay_stream* object whose stream ID is |stream_id|. It
|
|
* could be NULL if such stream does not exist.
|
|
*/
|
|
spdylay_stream* spdylay_session_get_stream(spdylay_session *session,
|
|
int32_t stream_id);
|
|
|
|
/*
|
|
* Packs DATA frame |frame| in wire frame format and store it in
|
|
* |*buf_ptr|. This function always allocates
|
|
* 8+SPDYLAY_DATA_CHUNK_LENGTH bytes. It packs header in first 8
|
|
* bytes. Remaining bytes are filled using frame->data_prd. This
|
|
* function returns the size of packed frame if it succeeds, or
|
|
* negative error code.
|
|
*/
|
|
ssize_t spdylay_session_pack_data(spdylay_session *session,
|
|
uint8_t **buf_ptr, spdylay_data *frame);
|
|
|
|
/*
|
|
* Packs DATA frame |frame| in wire frame format and store it in
|
|
* |buf|. |len| must be greater than or equal to 8. This function
|
|
* returns the sizeof packed frame if it succeeds, or negative error
|
|
* code.
|
|
*/
|
|
ssize_t spdylay_session_pack_data_overwrite(spdylay_session *session,
|
|
uint8_t *buf, size_t len,
|
|
spdylay_data *frame);
|
|
|
|
/*
|
|
* Returns next unique ID which can be used with PING.
|
|
*/
|
|
uint32_t spdylay_session_get_next_unique_id(spdylay_session *session);
|
|
|
|
/*
|
|
* Returns top of outbound frame queue. This function returns NULL if
|
|
* queue is empty.
|
|
*/
|
|
spdylay_outbound_item* spdylay_session_get_ob_pq_top(spdylay_session *session);
|
|
|
|
#endif /* SPDYLAY_SESSION_H */
|