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/*
* nghttp3
*
* Copyright (c) 2019 nghttp3 contributors
*
* 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 NGHTTP3_CONN_H
#define NGHTTP3_CONN_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <nghttp3/nghttp3.h>
#include "nghttp3_stream.h"
#include "nghttp3_map.h"
#include "nghttp3_qpack.h"
#include "nghttp3_tnode.h"
#include "nghttp3_idtr.h"
#include "nghttp3_gaptr.h"
#define NGHTTP3_VARINT_MAX ((1ull << 62) - 1)
/* NGHTTP3_QPACK_ENCODER_MAX_TABLE_CAPACITY is the maximum dynamic
table size for QPACK encoder. */
#define NGHTTP3_QPACK_ENCODER_MAX_TABLE_CAPACITY 16384
/* NGHTTP3_QPACK_ENCODER_MAX_BLOCK_STREAMS is the maximum number of
blocked streams for QPACK encoder. */
#define NGHTTP3_QPACK_ENCODER_MAX_BLOCK_STREAMS 100
/* NGHTTP3_CONN_FLAG_NONE indicates that no flag is set. */
#define NGHTTP3_CONN_FLAG_NONE 0x0000u
/* NGHTTP3_CONN_FLAG_SETTINGS_RECVED is set when SETTINGS frame has
been received. */
#define NGHTTP3_CONN_FLAG_SETTINGS_RECVED 0x0001u
/* NGHTTP3_CONN_FLAG_CONTROL_OPENED is set when a control stream has
opened. */
#define NGHTTP3_CONN_FLAG_CONTROL_OPENED 0x0002u
/* NGHTTP3_CONN_FLAG_QPACK_ENCODER_OPENED is set when a QPACK encoder
stream has opened. */
#define NGHTTP3_CONN_FLAG_QPACK_ENCODER_OPENED 0x0004u
/* NGHTTP3_CONN_FLAG_QPACK_DECODER_OPENED is set when a QPACK decoder
stream has opened. */
#define NGHTTP3_CONN_FLAG_QPACK_DECODER_OPENED 0x0008u
/* NGHTTP3_CONN_FLAG_SHUTDOWN_COMMENCED is set when graceful shutdown
has started. */
#define NGHTTP3_CONN_FLAG_SHUTDOWN_COMMENCED 0x0010u
/* NGHTTP3_CONN_FLAG_GOAWAY_RECVED indicates that GOAWAY frame has
received. */
#define NGHTTP3_CONN_FLAG_GOAWAY_RECVED 0x0020u
/* NGHTTP3_CONN_FLAG_GOAWAY_QUEUED indicates that GOAWAY frame has
been submitted for transmission. */
#define NGHTTP3_CONN_FLAG_GOAWAY_QUEUED 0x0040u
typedef struct nghttp3_chunk {
nghttp3_opl_entry oplent;
} nghttp3_chunk;
nghttp3_objalloc_decl(chunk, nghttp3_chunk, oplent);
struct nghttp3_conn {
nghttp3_objalloc out_chunk_objalloc;
nghttp3_objalloc stream_objalloc;
nghttp3_callbacks callbacks;
nghttp3_map streams;
nghttp3_qpack_decoder qdec;
nghttp3_qpack_encoder qenc;
nghttp3_pq qpack_blocked_streams;
struct {
nghttp3_pq spq;
} sched[NGHTTP3_URGENCY_LEVELS];
const nghttp3_mem *mem;
void *user_data;
int server;
uint16_t flags;
struct {
nghttp3_settings settings;
struct {
/* max_pushes is the number of push IDs that local endpoint can
issue. This field is used by server only and used just for
validation */
uint64_t max_pushes;
} uni;
} local;
struct {
struct {
nghttp3_idtr idtr;
/* max_client_streams is the cumulative number of client
initiated bidirectional stream ID the remote endpoint can
issue. This field is used on server side only. */
uint64_t max_client_streams;
/* num_streams is the number of client initiated bidirectional
streams that are currently open. This field is for server
use only. */
size_t num_streams;
} bidi;
nghttp3_settings settings;
} remote;
struct {
/* goaway_id is the latest ID received in GOAWAY frame. */
int64_t goaway_id;
int64_t max_stream_id_bidi;
/* pri_fieldbuf is a buffer to store incoming Priority Field Value
in PRIORITY_UPDATE frame. */
uint8_t pri_fieldbuf[8];
/* pri_fieldlen is the number of bytes written into
pri_fieldbuf. */
size_t pri_fieldbuflen;
} rx;
struct {
struct {
nghttp3_buf rbuf;
nghttp3_buf ebuf;
} qpack;
nghttp3_stream *ctrl;
nghttp3_stream *qenc;
nghttp3_stream *qdec;
/* goaway_id is the latest ID sent in GOAWAY frame. */
int64_t goaway_id;
} tx;
};
nghttp3_stream *nghttp3_conn_find_stream(nghttp3_conn *conn, int64_t stream_id);
int nghttp3_conn_create_stream(nghttp3_conn *conn, nghttp3_stream **pstream,
int64_t stream_id);
nghttp3_ssize nghttp3_conn_read_bidi(nghttp3_conn *conn, size_t *pnproc,
nghttp3_stream *stream, const uint8_t *src,
size_t srclen, int fin);
nghttp3_ssize nghttp3_conn_read_uni(nghttp3_conn *conn, nghttp3_stream *stream,
const uint8_t *src, size_t srclen, int fin);
nghttp3_ssize nghttp3_conn_read_control(nghttp3_conn *conn,
nghttp3_stream *stream,
const uint8_t *src, size_t srclen);
nghttp3_ssize nghttp3_conn_read_qpack_encoder(nghttp3_conn *conn,
const uint8_t *src,
size_t srclen);
nghttp3_ssize nghttp3_conn_read_qpack_decoder(nghttp3_conn *conn,
const uint8_t *src,
size_t srclen);
int nghttp3_conn_on_data(nghttp3_conn *conn, nghttp3_stream *stream,
const uint8_t *data, size_t datalen);
int nghttp3_conn_on_priority_update(nghttp3_conn *conn,
const nghttp3_frame_priority_update *fr);
nghttp3_ssize nghttp3_conn_on_headers(nghttp3_conn *conn,
nghttp3_stream *stream,
const uint8_t *data, size_t datalen,
int fin);
int nghttp3_conn_on_settings_entry_received(nghttp3_conn *conn,
const nghttp3_frame_settings *fr);
int nghttp3_conn_qpack_blocked_streams_push(nghttp3_conn *conn,
nghttp3_stream *stream);
void nghttp3_conn_qpack_blocked_streams_pop(nghttp3_conn *conn);
int nghttp3_conn_schedule_stream(nghttp3_conn *conn, nghttp3_stream *stream);
int nghttp3_conn_ensure_stream_scheduled(nghttp3_conn *conn,
nghttp3_stream *stream);
void nghttp3_conn_unschedule_stream(nghttp3_conn *conn, nghttp3_stream *stream);
int nghttp3_conn_reject_stream(nghttp3_conn *conn, nghttp3_stream *stream);
/*
* nghttp3_conn_get_next_tx_stream returns next stream to send. It
* returns NULL if there is no such stream.
*/
nghttp3_stream *nghttp3_conn_get_next_tx_stream(nghttp3_conn *conn);
#endif /* NGHTTP3_CONN_H */
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