125 lines
3.8 KiB
C++
125 lines
3.8 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SHRPX_HTTP_DOWNSTREAM_CONNECTION_H
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#define SHRPX_HTTP_DOWNSTREAM_CONNECTION_H
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#include "shrpx.h"
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#include "llhttp.h"
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#include "shrpx_downstream_connection.h"
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#include "shrpx_io_control.h"
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#include "shrpx_connection.h"
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namespace shrpx {
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class DownstreamConnectionPool;
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class Worker;
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struct DownstreamAddrGroup;
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struct DownstreamAddr;
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struct DNSQuery;
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class HttpDownstreamConnection : public DownstreamConnection {
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public:
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HttpDownstreamConnection(const std::shared_ptr<DownstreamAddrGroup> &group,
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DownstreamAddr *addr, struct ev_loop *loop,
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Worker *worker);
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virtual ~HttpDownstreamConnection();
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virtual int attach_downstream(Downstream *downstream);
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virtual void detach_downstream(Downstream *downstream);
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virtual int push_request_headers();
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virtual int push_upload_data_chunk(const uint8_t *data, size_t datalen);
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virtual int end_upload_data();
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void end_upload_data_chunk();
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virtual void pause_read(IOCtrlReason reason);
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virtual int resume_read(IOCtrlReason reason, size_t consumed);
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virtual void force_resume_read();
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virtual int on_read();
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virtual int on_write();
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virtual void on_upstream_change(Upstream *upstream);
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virtual bool poolable() const;
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virtual const std::shared_ptr<DownstreamAddrGroup> &
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get_downstream_addr_group() const;
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virtual DownstreamAddr *get_addr() const;
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int initiate_connection();
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int write_first();
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int read_clear();
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int write_clear();
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int read_tls();
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int write_tls();
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int process_input(const uint8_t *data, size_t datalen);
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int tls_handshake();
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int connected();
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void signal_write();
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int actual_signal_write();
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// Returns address used to connect to backend. Could be nullptr.
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const Address *get_raddr() const;
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int noop();
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int process_blocked_request_buf();
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private:
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Connection conn_;
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std::function<int(HttpDownstreamConnection &)> on_read_, on_write_,
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signal_write_;
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Worker *worker_;
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// nullptr if TLS is not used.
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SSL_CTX *ssl_ctx_;
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std::shared_ptr<DownstreamAddrGroup> group_;
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// Address of remote endpoint
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DownstreamAddr *addr_;
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// Actual remote address used to contact backend. This is initially
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// nullptr, and may point to either &addr_->addr, or
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// resolved_addr_.get().
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const Address *raddr_;
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// Resolved IP address if dns parameter is used
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std::unique_ptr<Address> resolved_addr_;
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std::unique_ptr<DNSQuery> dns_query_;
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IOControl ioctrl_;
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llhttp_t response_htp_;
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// true if first write succeeded.
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bool first_write_done_;
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// true if this object can be reused
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bool reusable_;
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// true if request header is written to request buffer.
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bool request_header_written_;
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};
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} // namespace shrpx
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#endif // SHRPX_HTTP_DOWNSTREAM_CONNECTION_H
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