intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 400 insertions, 0 deletions

diff --git a/contrib/libs/poco/Net/src/WebSocketImpl.cpp b/contrib/libs/poco/Net/src/WebSocketImpl.cpp
new file mode 100644
index 0000000000..49fcad63c2
--- /dev/null
+++ b/contrib/libs/poco/Net/src/WebSocketImpl.cpp
@@ -0,0 +1,400 @@
+//
+// WebSocketImpl.cpp
+//
+// Library: Net
+// Package: WebSocket
+// Module:  WebSocketImpl
+//
+// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#define NOMINMAX
+#include "Poco/Net/WebSocketImpl.h"
+#include "Poco/Net/NetException.h"
+#include "Poco/Net/WebSocket.h"
+#include "Poco/Net/HTTPSession.h"
+#include "Poco/Buffer.h"
+#include "Poco/BinaryWriter.h"
+#include "Poco/BinaryReader.h"
+#include "Poco/MemoryStream.h"
+#include "Poco/Format.h"
+#include <limits>
+#include <cstring>
+
+
+namespace Poco {
+namespace Net {
+
+
+WebSocketImpl::WebSocketImpl(StreamSocketImpl* pStreamSocketImpl, HTTPSession& session, bool mustMaskPayload):
+	StreamSocketImpl(pStreamSocketImpl->sockfd()),
+	_pStreamSocketImpl(pStreamSocketImpl),
+	_maxPayloadSize(std::numeric_limits<int>::max()),
+	_buffer(0),
+	_bufferOffset(0),
+	_frameFlags(0),
+	_mustMaskPayload(mustMaskPayload)
+{
+	poco_check_ptr(pStreamSocketImpl);
+	_pStreamSocketImpl->duplicate();
+	session.drainBuffer(_buffer);
+}
+
+
+WebSocketImpl::~WebSocketImpl()
+{
+	try
+	{
+		_pStreamSocketImpl->release();
+		reset();
+	}
+	catch (...)
+	{
+		poco_unexpected();
+	}
+}
+
+
+int WebSocketImpl::sendBytes(const void* buffer, int length, int flags)
+{
+	Poco::Buffer<char> frame(length + MAX_HEADER_LENGTH);
+	Poco::MemoryOutputStream ostr(frame.begin(), frame.size());
+	Poco::BinaryWriter writer(ostr, Poco::BinaryWriter::NETWORK_BYTE_ORDER);
+
+	if (flags == 0) flags = WebSocket::FRAME_BINARY;
+	flags &= 0xff;
+	writer << static_cast<Poco::UInt8>(flags);
+	Poco::UInt8 lengthByte(0);
+	if (_mustMaskPayload)
+	{
+		lengthByte |= FRAME_FLAG_MASK;
+	}
+	if (length < 126)
+	{
+		lengthByte |= static_cast<Poco::UInt8>(length);
+		writer << lengthByte;
+	}
+	else if (length < 65536)
+	{
+		lengthByte |= 126;
+		writer << lengthByte << static_cast<Poco::UInt16>(length);
+	}
+	else
+	{
+		lengthByte |= 127;
+		writer << lengthByte << static_cast<Poco::UInt64>(length);
+	}
+	if (_mustMaskPayload)
+	{
+		const Poco::UInt32 mask = _rnd.next();
+		const char* m = reinterpret_cast<const char*>(&mask);
+		const char* b = reinterpret_cast<const char*>(buffer);
+		writer.writeRaw(m, 4);
+		char* p = frame.begin() + ostr.charsWritten();
+		for (int i = 0; i < length; i++)
+		{
+			p[i] = b[i] ^ m[i % 4];
+		}
+	}
+	else
+	{
+		std::memcpy(frame.begin() + ostr.charsWritten(), buffer, length);
+	}
+	_pStreamSocketImpl->sendBytes(frame.begin(), length + static_cast<int>(ostr.charsWritten()));
+	return length;
+}
+
+
+int WebSocketImpl::receiveHeader(char mask[4], bool& useMask)
+{
+	char header[MAX_HEADER_LENGTH];
+	int n = receiveNBytes(header, 2);
+	if (n <= 0)
+	{
+		_frameFlags = 0;
+		return n;
+	}
+	poco_assert (n == 2);
+	Poco::UInt8 flags = static_cast<Poco::UInt8>(header[0]);
+	_frameFlags = flags;
+	Poco::UInt8 lengthByte = static_cast<Poco::UInt8>(header[1]);
+	useMask = ((lengthByte & FRAME_FLAG_MASK) != 0);
+	int payloadLength;
+	lengthByte &= 0x7f;
+	if (lengthByte == 127)
+	{
+		n = receiveNBytes(header + 2, 8);
+		if (n <= 0)
+		{
+			_frameFlags = 0;
+			return n;
+		}
+		Poco::MemoryInputStream istr(header + 2, 8);
+		Poco::BinaryReader reader(istr, Poco::BinaryReader::NETWORK_BYTE_ORDER);
+		Poco::UInt64 l;
+		reader >> l;
+		if (l > _maxPayloadSize) throw WebSocketException("Payload too big", WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
+		payloadLength = static_cast<int>(l);
+	}
+	else if (lengthByte == 126)
+	{
+		n = receiveNBytes(header + 2, 2);
+		if (n <= 0)
+		{
+			_frameFlags = 0;
+			return n;
+		}
+		Poco::MemoryInputStream istr(header + 2, 2);
+		Poco::BinaryReader reader(istr, Poco::BinaryReader::NETWORK_BYTE_ORDER);
+		Poco::UInt16 l;
+		reader >> l;
+		if (l > _maxPayloadSize) throw WebSocketException("Payload too big", WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
+		payloadLength = static_cast<int>(l);
+	}
+	else
+	{
+		if (lengthByte > _maxPayloadSize) throw WebSocketException("Payload too big", WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
+		payloadLength = lengthByte;
+	}
+
+	if (useMask)
+	{
+		n = receiveNBytes(mask, 4);
+		if (n <= 0)
+		{
+			_frameFlags = 0;
+			return n;
+		}
+	}
+
+	return payloadLength;
+}
+
+
+void WebSocketImpl::setMaxPayloadSize(int maxPayloadSize)
+{
+	poco_assert (maxPayloadSize > 0);
+
+	_maxPayloadSize = maxPayloadSize;
+}
+
+
+int WebSocketImpl::receivePayload(char *buffer, int payloadLength, char mask[4], bool useMask)
+{
+	int received = receiveNBytes(reinterpret_cast<char*>(buffer), payloadLength);
+	if (received <= 0) throw WebSocketException("Incomplete frame received", WebSocket::WS_ERR_INCOMPLETE_FRAME);
+
+	if (useMask)
+	{
+		for (int i = 0; i < received; i++)
+		{
+			buffer[i] ^= mask[i % 4];
+		}
+	}
+	return received;
+}
+
+
+int WebSocketImpl::receiveBytes(void* buffer, int length, int)
+{
+	char mask[4];
+	bool useMask;
+	int payloadLength = receiveHeader(mask, useMask);
+	if (payloadLength <= 0)
+		return payloadLength;
+	if (payloadLength > length)
+		throw WebSocketException(Poco::format("Insufficient buffer for payload size %d", payloadLength), WebSocket::WS_ERR_PAYLOAD_TOO_BIG);
+	return receivePayload(reinterpret_cast<char*>(buffer), payloadLength, mask, useMask);
+}
+
+
+int WebSocketImpl::receiveBytes(Poco::Buffer<char>& buffer, int)
+{
+	char mask[4];
+	bool useMask;
+	int payloadLength = receiveHeader(mask, useMask);
+	if (payloadLength <= 0)
+		return payloadLength;
+	std::size_t oldSize = buffer.size();
+	buffer.resize(oldSize + payloadLength);
+	return receivePayload(buffer.begin() + oldSize, payloadLength, mask, useMask);
+}
+
+
+int WebSocketImpl::receiveNBytes(void* buffer, int bytes)
+{
+	int received = receiveSomeBytes(reinterpret_cast<char*>(buffer), bytes);
+	if (received > 0)
+	{
+		while (received < bytes)
+		{
+			int n = receiveSomeBytes(reinterpret_cast<char*>(buffer) + received, bytes - received);
+			if (n > 0)
+				received += n;
+			else
+				throw WebSocketException("Incomplete frame received", WebSocket::WS_ERR_INCOMPLETE_FRAME);
+		}
+	}
+	return received;
+}
+
+
+int WebSocketImpl::receiveSomeBytes(char* buffer, int bytes)
+{
+	int n = static_cast<int>(_buffer.size()) - _bufferOffset;
+	if (n > 0)
+	{
+		if (bytes < n) n = bytes;
+		std::memcpy(buffer, _buffer.begin() + _bufferOffset, n);
+		_bufferOffset += n;
+		return n;
+	}
+	else
+	{
+		return _pStreamSocketImpl->receiveBytes(buffer, bytes);
+	}
+}
+
+
+SocketImpl* WebSocketImpl::acceptConnection(SocketAddress& /*clientAddr*/)
+{
+	throw Poco::InvalidAccessException("Cannot acceptConnection() on a WebSocketImpl");
+}
+
+
+void WebSocketImpl::connect(const SocketAddress& /*address*/)
+{
+	throw Poco::InvalidAccessException("Cannot connect() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::connect(const SocketAddress& /*address*/, const Poco::Timespan& /*timeout*/)
+{
+	throw Poco::InvalidAccessException("Cannot connect() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::connectNB(const SocketAddress& /*address*/)
+{
+	throw Poco::InvalidAccessException("Cannot connectNB() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::bind(const SocketAddress& /*address*/, bool /*reuseAddress*/)
+{
+	throw Poco::InvalidAccessException("Cannot bind() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::bind(const SocketAddress& /*address*/, bool /*reuseAddress*/, bool /*reusePort*/)
+{
+	throw Poco::InvalidAccessException("Cannot bind() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::bind6(const SocketAddress& /*address*/, bool /*reuseAddress*/, bool /*ipV6Only*/)
+{
+	throw Poco::InvalidAccessException("Cannot bind6() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::bind6(const SocketAddress& /*address*/, bool /*reuseAddress*/, bool /*reusePort*/, bool /*ipV6Only*/)
+{
+	throw Poco::InvalidAccessException("Cannot bind6() a WebSocketImpl");
+}
+
+
+void WebSocketImpl::listen(int /*backlog*/)
+{
+	throw Poco::InvalidAccessException("Cannot listen() on a WebSocketImpl");
+}
+
+
+void WebSocketImpl::close()
+{
+	_pStreamSocketImpl->close();
+	reset();
+}
+
+
+void WebSocketImpl::shutdownReceive()
+{
+	_pStreamSocketImpl->shutdownReceive();
+}
+
+
+void WebSocketImpl::shutdownSend()
+{
+	_pStreamSocketImpl->shutdownSend();
+}
+
+
+void WebSocketImpl::shutdown()
+{
+	_pStreamSocketImpl->shutdown();
+}
+
+
+int WebSocketImpl::sendTo(const void* /*buffer*/, int /*length*/, const SocketAddress& /*address*/, int /*flags*/)
+{
+	throw Poco::InvalidAccessException("Cannot sendTo() on a WebSocketImpl");
+}
+
+
+int WebSocketImpl::receiveFrom(void* /*buffer*/, int /*length*/, SocketAddress& /*address*/, int /*flags*/)
+{
+	throw Poco::InvalidAccessException("Cannot receiveFrom() on a WebSocketImpl");
+}
+
+
+void WebSocketImpl::sendUrgent(unsigned char /*data*/)
+{
+	throw Poco::InvalidAccessException("Cannot sendUrgent() on a WebSocketImpl");
+}
+
+
+bool WebSocketImpl::secure() const
+{
+	return _pStreamSocketImpl->secure();
+}
+
+
+void WebSocketImpl::setSendTimeout(const Poco::Timespan& timeout)
+{
+	_pStreamSocketImpl->setSendTimeout(timeout);
+}
+
+
+Poco::Timespan WebSocketImpl::getSendTimeout()
+{
+	return _pStreamSocketImpl->getSendTimeout();
+}
+
+
+void WebSocketImpl::setReceiveTimeout(const Poco::Timespan& timeout)
+{
+	_pStreamSocketImpl->setReceiveTimeout(timeout);
+}
+
+
+Poco::Timespan WebSocketImpl::getReceiveTimeout()
+{
+	return _pStreamSocketImpl->getReceiveTimeout();
+}
+
+
+int WebSocketImpl::available()
+{
+	int n = static_cast<int>(_buffer.size()) - _bufferOffset;
+	if (n > 0)
+		return n + _pStreamSocketImpl->available();
+	else
+		return _pStreamSocketImpl->available();
+}
+
+
+} } // namespace Poco::Net