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new trunk (base for 1.5)
windows build only
This commit is contained in:
Aleksandar Fabijanic
279
Net/src/WebSocketImpl.cpp
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279
Net/src/WebSocketImpl.cpp
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//
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// WebSocketImpl.cpp
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//
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// $Id: //poco/1.4/Net/src/WebSocketImpl.cpp#2 $
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//
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// Library: Net
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// Package: WebSocket
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// Module: WebSocketImpl
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/Net/WebSocketImpl.h"
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#include "Poco/Net/NetException.h"
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#include "Poco/Net/WebSocket.h"
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#include "Poco/Buffer.h"
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#include "Poco/BinaryWriter.h"
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#include "Poco/BinaryReader.h"
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#include "Poco/MemoryStream.h"
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#include "Poco/Format.h"
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#include <cstring>
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namespace Poco {
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namespace Net {
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WebSocketImpl::WebSocketImpl(StreamSocketImpl* pStreamSocketImpl, bool mustMaskPayload):
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StreamSocketImpl(pStreamSocketImpl->sockfd()),
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_pStreamSocketImpl(pStreamSocketImpl),
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_frameFlags(0),
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_mustMaskPayload(mustMaskPayload)
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{
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poco_check_ptr(pStreamSocketImpl);
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_pStreamSocketImpl->duplicate();
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}
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WebSocketImpl::~WebSocketImpl()
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{
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_pStreamSocketImpl->release();
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reset();
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}
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int WebSocketImpl::sendBytes(const void* buffer, int length, int flags)
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{
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Poco::Buffer<char> frame(length + MAX_HEADER_LENGTH);
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Poco::MemoryOutputStream ostr(frame.begin(), frame.size());
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Poco::BinaryWriter writer(ostr, Poco::BinaryWriter::NETWORK_BYTE_ORDER);
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writer << static_cast<Poco::UInt8>(flags);
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Poco::UInt8 lengthByte(0);
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if (_mustMaskPayload)
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{
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lengthByte |= FRAME_FLAG_MASK;
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}
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if (length < 126)
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{
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lengthByte |= static_cast<Poco::UInt8>(length);
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writer << lengthByte;
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}
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else if (length < 65536)
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{
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lengthByte |= 126;
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writer << lengthByte << static_cast<Poco::UInt16>(length);
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}
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else
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{
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lengthByte |= 127;
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writer << lengthByte << static_cast<Poco::UInt64>(length);
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}
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if (_mustMaskPayload)
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{
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const Poco::UInt32 mask = _rnd.next();
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const char* m = reinterpret_cast<const char*>(&mask);
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const char* b = reinterpret_cast<const char*>(buffer);
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writer.writeRaw(m, 4);
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char* p = frame.begin() + ostr.charsWritten();
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for (int i = 0; i < length; i++)
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{
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p[i] = b[i] ^ m[i % 4];
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}
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}
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else
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{
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std::memcpy(frame.begin() + ostr.charsWritten(), buffer, length);
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}
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_pStreamSocketImpl->sendBytes(frame.begin(), length + static_cast<int>(ostr.charsWritten()));
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return length;
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}
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int WebSocketImpl::receiveBytes(void* buffer, int length, int)
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{
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char header[MAX_HEADER_LENGTH];
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int n = _pStreamSocketImpl->receiveBytes(header, MAX_HEADER_LENGTH);
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if (n > 0)
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{
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Poco::MemoryInputStream istr(header, n);
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Poco::BinaryReader reader(istr, Poco::BinaryReader::NETWORK_BYTE_ORDER);
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Poco::UInt8 flags;
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Poco::UInt8 lengthByte;
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char mask[4];
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reader >> flags >> lengthByte;
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_frameFlags = flags;
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int payloadLength = 0;
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int payloadOffset = 2;
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if ((lengthByte & 0x7f) == 127)
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{
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Poco::UInt64 l;
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reader >> l;
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if (l > length) throw WebSocketException(Poco::format("Insufficient buffer for payload size %Lu", l), WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
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payloadLength = static_cast<int>(l);
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payloadOffset += 8;
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}
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else if ((lengthByte & 0x7f) == 126)
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{
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Poco::UInt16 l;
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reader >> l;
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if (l > length) throw WebSocketException(Poco::format("Insufficient buffer for payload size %hu", l), WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
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payloadLength = static_cast<int>(l);
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payloadOffset += 2;
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}
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else
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{
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Poco::UInt8 l = lengthByte & 0x7f;
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if (l > length) throw WebSocketException(Poco::format("Insufficient buffer for payload size %u", unsigned(l)), WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
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payloadLength = static_cast<int>(l);
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}
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if (lengthByte & FRAME_FLAG_MASK)
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{
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reader.readRaw(mask, 4);
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payloadOffset += 4;
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}
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int received = 0;
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if (payloadOffset < n)
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{
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std::memcpy(buffer, header + payloadOffset, n - payloadOffset);
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received = n - payloadOffset;
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}
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while (received < payloadLength)
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{
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n = _pStreamSocketImpl->receiveBytes(reinterpret_cast<char*>(buffer) + received, payloadLength - received);
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if (n > 0)
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received += n;
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else
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throw WebSocketException("Incomplete frame received", WebSocket::WS_ERR_INCOMPLETE_FRAME);
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}
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if (lengthByte & FRAME_FLAG_MASK)
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{
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char* p = reinterpret_cast<char*>(buffer);
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for (int i = 0; i < received; i++)
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{
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p[i] ^= mask[i % 4];
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}
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}
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return received;
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}
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return n;
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}
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SocketImpl* WebSocketImpl::acceptConnection(SocketAddress& clientAddr)
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{
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throw Poco::InvalidAccessException("Cannot acceptConnection() on a WebSocketImpl");
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}
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void WebSocketImpl::connect(const SocketAddress& address)
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{
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throw Poco::InvalidAccessException("Cannot connect() a WebSocketImpl");
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}
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void WebSocketImpl::connect(const SocketAddress& address, const Poco::Timespan& timeout)
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{
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throw Poco::InvalidAccessException("Cannot connect() a WebSocketImpl");
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}
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void WebSocketImpl::connectNB(const SocketAddress& address, const Poco::Timespan& timeout)
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{
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throw Poco::InvalidAccessException("Cannot connectNB() a WebSocketImpl");
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}
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void WebSocketImpl::bind(const SocketAddress& address, bool reuseAddress)
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{
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throw Poco::InvalidAccessException("Cannot bind() a WebSocketImpl");
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}
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void WebSocketImpl::bind6(const SocketAddress& address, bool reuseAddress, bool ipV6Only)
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{
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throw Poco::InvalidAccessException("Cannot bind6() a WebSocketImpl");
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}
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void WebSocketImpl::listen(int backlog)
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{
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throw Poco::InvalidAccessException("Cannot listen() on a WebSocketImpl");
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}
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void WebSocketImpl::close()
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{
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_pStreamSocketImpl->close();
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reset();
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}
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void WebSocketImpl::shutdownReceive()
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{
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_pStreamSocketImpl->shutdownReceive();
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}
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void WebSocketImpl::shutdownSend()
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{
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_pStreamSocketImpl->shutdownSend();
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}
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void WebSocketImpl::shutdown()
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{
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_pStreamSocketImpl->shutdown();
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}
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int WebSocketImpl::sendTo(const void* buffer, int length, const SocketAddress& address, int flags)
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{
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throw Poco::InvalidAccessException("Cannot sendTo() on a WebSocketImpl");
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}
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int WebSocketImpl::receiveFrom(void* buffer, int length, SocketAddress& address, int flags)
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{
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throw Poco::InvalidAccessException("Cannot receiveFrom() on a WebSocketImpl");
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}
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void WebSocketImpl::sendUrgent(unsigned char data)
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{
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throw Poco::InvalidAccessException("Cannot sendUrgent() on a WebSocketImpl");
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}
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bool WebSocketImpl::secure() const
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{
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return _pStreamSocketImpl->secure();
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}
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} } // namespace Poco::Net
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