nghttp2/src/shrpx_http2_session.h

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/*
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* 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 SHRPX_HTTP2_SESSION_H
#define SHRPX_HTTP2_SESSION_H
#include "shrpx.h"
#include <set>
#include <memory>
#include <openssl/ssl.h>
#include <event.h>
#include <event2/bufferevent.h>
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#include <nghttp2/nghttp2.h>
#include "http-parser/http_parser.h"
namespace shrpx {
class Http2DownstreamConnection;
struct StreamData {
Http2DownstreamConnection *dconn;
};
class Http2Session {
public:
Http2Session(event_base *evbase, SSL_CTX *ssl_ctx);
~Http2Session();
int init_notification();
int check_cert();
int disconnect();
int initiate_connection();
void add_downstream_connection(Http2DownstreamConnection *dconn);
void remove_downstream_connection(Http2DownstreamConnection *dconn);
void remove_stream_data(StreamData *sd);
int submit_request(Http2DownstreamConnection *dconn,
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int32_t pri, const nghttp2_nv *nva, size_t nvlen,
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const nghttp2_data_provider *data_prd);
int submit_rst_stream(int32_t stream_id, nghttp2_error_code error_code);
// To send WINDOW_UPDATE for a connection, specify nullptr to
// |dconn|.
int submit_window_update(Http2DownstreamConnection *dconn, int32_t amount);
int submit_priority(Http2DownstreamConnection *dconn, int32_t pri);
int terminate_session(nghttp2_error_code error_code);
nghttp2_session* get_session() const;
bool get_flow_control() const;
int resume_data(Http2DownstreamConnection *dconn);
int on_connect();
int on_read();
int on_write();
int send();
int on_read_proxy();
void clear_notify();
void notify();
bufferevent* get_bev() const;
void unwrap_free_bev();
int get_state() const;
void set_state(int state);
int start_settings_timer();
void stop_settings_timer();
size_t get_outbuf_length() const;
enum {
// Disconnected
DISCONNECTED,
// Connecting proxy and making CONNECT request
PROXY_CONNECTING,
// Tunnel is established with proxy
PROXY_CONNECTED,
// Establishing tunnel is failed
PROXY_FAILED,
// Connecting to downstream and/or performing SSL/TLS handshake
CONNECTING,
// Connected to downstream
CONNECTED
};
static const size_t OUTBUF_MAX_THRES = 64*1024;
private:
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std::set<Http2DownstreamConnection*> dconns_;
std::set<StreamData*> streams_;
// Used to parse the response from HTTP proxy
std::unique_ptr<http_parser> proxy_htp_;
event_base *evbase_;
// NULL if no TLS is configured
SSL_CTX *ssl_ctx_;
SSL *ssl_;
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nghttp2_session *session_;
bufferevent *bev_;
bufferevent *wrbev_;
bufferevent *rdbev_;
event *settings_timerev_;
// fd_ is used for proxy connection and no TLS connection. For
// direct or TLS connection, it may be -1 even after connection is
// established. Use bufferevent_getfd(bev_) to get file descriptor
// in these cases.
int fd_;
int state_;
bool notified_;
bool flow_control_;
};
} // namespace shrpx
#endif // SHRPX_HTTP2_SESSION_H