nghttp2/src/shrpx_client_handler.h

186 lines
6.0 KiB
C++

/*
* nghttp2 - HTTP/2 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_CLIENT_HANDLER_H
#define SHRPX_CLIENT_HANDLER_H
#include "shrpx.h"
#include <memory>
#include <ev.h>
#include <openssl/ssl.h>
#include "shrpx_rate_limit.h"
#include "ringbuf.h"
using namespace nghttp2;
namespace shrpx {
class Upstream;
class DownstreamConnection;
class Http2Session;
class HttpsUpstream;
class ConnectBlocker;
class DownstreamConnectionPool;
struct WorkerStat;
typedef RingBuf<65536> UpstreamBuf;
class ClientHandler {
public:
ClientHandler(struct ev_loop *loop, int fd, SSL *ssl, const char *ipaddr,
const char *port, WorkerStat *worker_stat,
DownstreamConnectionPool *dconn_pool);
~ClientHandler();
// Performs clear text I/O
int read_clear();
int write_clear();
// Performs TLS handshake
int tls_handshake();
// Performs TLS I/O
int read_tls();
int write_tls();
int upstream_noop();
int upstream_read();
int upstream_http2_connhd_read();
int upstream_http1_connhd_read();
int upstream_write();
// Performs I/O operation. Internally calls on_read()/on_write().
int do_read();
int do_write();
// Processes buffers. No underlying I/O operation will be done.
int on_read();
int on_write();
struct ev_loop *get_loop() const;
void reset_upstream_read_timeout(ev_tstamp t);
void reset_upstream_write_timeout(ev_tstamp t);
int validate_next_proto();
const std::string &get_ipaddr() const;
const std::string &get_port() const;
bool get_should_close_after_write() const;
void set_should_close_after_write(bool f);
Upstream *get_upstream();
void pool_downstream_connection(std::unique_ptr<DownstreamConnection> dconn);
void remove_downstream_connection(DownstreamConnection *dconn);
std::unique_ptr<DownstreamConnection> get_downstream_connection();
SSL *get_ssl() const;
void set_http2_session(Http2Session *http2session);
Http2Session *get_http2_session() const;
void set_http1_connect_blocker(ConnectBlocker *http1_connect_blocker);
ConnectBlocker *get_http1_connect_blocker() const;
// Call this function when HTTP/2 connection header is received at
// the start of the connection.
void direct_http2_upgrade();
// Performs HTTP/2 Upgrade from the connection managed by
// |http|. If this function fails, the connection must be
// terminated. This function returns 0 if it succeeds, or -1.
int perform_http2_upgrade(HttpsUpstream *http);
bool get_http2_upgrade_allowed() const;
// Returns upstream scheme, either "http" or "https"
std::string get_upstream_scheme() const;
void set_tls_handshake(bool f);
bool get_tls_handshake() const;
void set_tls_renegotiation(bool f);
bool get_tls_renegotiation() const;
// Returns maximum chunk size for one evbuffer_add(). The intention
// of this chunk size is control the TLS record size. The actual
// SSL_write() call is done under libevent control. In
// libevent-2.0.21, libevent calls SSL_write() for each chunk inside
// evbuffer. This means that we can control TLS record size by
// adjusting the chunk size to evbuffer_add().
//
// This function returns -1, if TLS is not enabled or no limitation
// is required.
ssize_t get_write_limit();
// Updates the number of bytes written in warm up period.
void update_warmup_writelen(size_t n);
// Updates the time when last write was done.
void update_last_write_time();
// Writes upstream accesslog using |downstream|. The |downstream|
// must not be nullptr.
void write_accesslog(Downstream *downstream);
// Writes upstream accesslog. This function is used if
// corresponding Downstream object is not available.
void write_accesslog(int major, int minor, unsigned int status,
int64_t body_bytes_sent);
WorkerStat *get_worker_stat() const;
UpstreamBuf *get_wb();
UpstreamBuf *get_rb();
RateLimit *get_rlimit();
RateLimit *get_wlimit();
void signal_write();
private:
ev_io wev_;
ev_io rev_;
ev_timer wt_;
ev_timer rt_;
ev_timer reneg_shutdown_timer_;
std::unique_ptr<Upstream> upstream_;
std::string ipaddr_;
std::string port_;
// The ALPN identifier negotiated for this connection.
std::string alpn_;
std::function<int(ClientHandler &)> read_, write_;
std::function<int(ClientHandler &)> on_read_, on_write_;
RateLimit wlimit_;
RateLimit rlimit_;
struct ev_loop *loop_;
DownstreamConnectionPool *dconn_pool_;
// Shared HTTP2 session for each thread. NULL if backend is not
// HTTP2. Not deleted by this object.
Http2Session *http2session_;
ConnectBlocker *http1_connect_blocker_;
SSL *ssl_;
WorkerStat *worker_stat_;
int64_t last_write_time_;
size_t warmup_writelen_;
// The number of bytes of HTTP/2 client connection header to read
size_t left_connhd_len_;
int fd_;
bool should_close_after_write_;
bool tls_handshake_;
bool tls_renegotiation_;
UpstreamBuf wb_;
UpstreamBuf rb_;
};
} // namespace shrpx
#endif // SHRPX_CLIENT_HANDLER_H