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/*
* 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_HTTP_DOWNSTREAM_CONNECTION_H
#define SHRPX_HTTP_DOWNSTREAM_CONNECTION_H
#include "shrpx.h"
#include "llhttp.h"
#include "shrpx_downstream_connection.h"
#include "shrpx_io_control.h"
#include "shrpx_connection.h"
namespace shrpx {
class DownstreamConnectionPool;
class Worker;
struct DownstreamAddrGroup;
struct DownstreamAddr;
struct DNSQuery;
class HttpDownstreamConnection : public DownstreamConnection {
public:
HttpDownstreamConnection(const std::shared_ptr<DownstreamAddrGroup> &group,
DownstreamAddr *addr, struct ev_loop *loop,
Worker *worker);
virtual ~HttpDownstreamConnection();
virtual int attach_downstream(Downstream *downstream);
virtual void detach_downstream(Downstream *downstream);
virtual int push_request_headers();
virtual int push_upload_data_chunk(const uint8_t *data, size_t datalen);
virtual int end_upload_data();
void end_upload_data_chunk();
virtual void pause_read(IOCtrlReason reason);
virtual int resume_read(IOCtrlReason reason, size_t consumed);
virtual void force_resume_read();
virtual int on_read();
virtual int on_write();
virtual void on_upstream_change(Upstream *upstream);
virtual bool poolable() const;
virtual const std::shared_ptr<DownstreamAddrGroup> &
get_downstream_addr_group() const;
virtual DownstreamAddr *get_addr() const;
int initiate_connection();
int write_first();
int read_clear();
int write_clear();
int read_tls();
int write_tls();
int process_input(const uint8_t *data, size_t datalen);
int tls_handshake();
int connected();
void signal_write();
int actual_signal_write();
// Returns address used to connect to backend. Could be nullptr.
const Address *get_raddr() const;
int noop();
int process_blocked_request_buf();
private:
Connection conn_;
std::function<int(HttpDownstreamConnection &)> on_read_, on_write_,
signal_write_;
Worker *worker_;
// nullptr if TLS is not used.
SSL_CTX *ssl_ctx_;
std::shared_ptr<DownstreamAddrGroup> group_;
// Address of remote endpoint
DownstreamAddr *addr_;
// Actual remote address used to contact backend. This is initially
// nullptr, and may point to either &addr_->addr, or
// resolved_addr_.get().
const Address *raddr_;
// Resolved IP address if dns parameter is used
std::unique_ptr<Address> resolved_addr_;
std::unique_ptr<DNSQuery> dns_query_;
IOControl ioctrl_;
llhttp_t response_htp_;
// true if first write succeeded.
bool first_write_done_;
// true if this object can be reused
bool reusable_;
// true if request header is written to request buffer.
bool request_header_written_;
};
} // namespace shrpx
#endif // SHRPX_HTTP_DOWNSTREAM_CONNECTION_H
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