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6e934ee6a1
* New I/O paths for client and server role * New handshake_analyzer detects the peer protocol * New basic_message class for parsing and storing HTTP messages * Conditional compilation for selective feature enabling. * Server supports both current handshake and HTTP handshake
74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_OVERLAY_PEER_PROTOCOL_DETECTOR_H_INCLUDED
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#define RIPPLE_OVERLAY_PEER_PROTOCOL_DETECTOR_H_INCLUDED
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#include <boost/asio/buffer.hpp>
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#include <boost/logic/tribool.hpp>
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#include <cstdint>
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namespace ripple {
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/** Detects the peer protocol handshake. */
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class peer_protocol_detector
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{
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public:
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/** Returns `true` if the buffers contain the required protocol messages.
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The peer protcol requires the 'hello' message as the first item on
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the stream. We check the 6-byte message header to determine if the
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hello is present.
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@return `false` if the buffers cannot possibly contain the message, or
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`boost::indeterminate` if more data is needed.
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*/
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template <class ConstBufferSequence>
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boost::tribool
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operator() (ConstBufferSequence const& buffers);
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};
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template <class ConstBufferSequence>
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boost::tribool
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peer_protocol_detector::operator() (
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ConstBufferSequence const& buffers)
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{
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std::array <std::uint8_t, 6> data;
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auto const n (boost::asio::buffer_copy (
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boost::asio::buffer(data), buffers));
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/*
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Protocol messages are framed by a 6 byte header which includes
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a big-endian 4-byte length followed by a big-endian 2-byte type.
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The type for 'hello' is 1.
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*/
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if (n>=1 && data[0] != 0)
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return false;
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if (n>=2 && data[1] != 0)
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return false;
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if (n>=5 && data[4] != 0)
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return false;
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if (n>=6 && data[5] != 1)
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return false;
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if (n>=6)
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return true;
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return boost::indeterminate;
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}
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} // ripple
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#endif
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