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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_SOCKETS)
#include "WebSocketChannel.h"
#include "CString.h"
#include "CookieJar.h"
#include "Document.h"
#include "Logging.h"
#include "PlatformString.h"
#include "ScriptExecutionContext.h"
#include "SocketStreamError.h"
#include "SocketStreamHandle.h"
#include "StringHash.h"
#include "WebSocketChannelClient.h"
#include <wtf/Deque.h>
#include <wtf/FastMalloc.h>
#include <wtf/HashMap.h>
namespace WebCore {
WebSocketChannel::WebSocketChannel(ScriptExecutionContext* context, WebSocketChannelClient* client, const KURL& url, const String& protocol)
: m_context(context)
, m_client(client)
, m_handshake(url, protocol, context)
, m_buffer(0)
, m_bufferSize(0)
, m_unhandledBufferSize(0)
{
}
WebSocketChannel::~WebSocketChannel()
{
fastFree(m_buffer);
}
void WebSocketChannel::connect()
{
LOG(Network, "WebSocketChannel %p connect", this);
ASSERT(!m_handle);
m_handshake.reset();
ref();
m_handle = SocketStreamHandle::create(m_handshake.url(), this);
}
bool WebSocketChannel::send(const String& msg)
{
LOG(Network, "WebSocketChannel %p send %s", this, msg.utf8().data());
Vector<char> buf;
buf.append('\0'); // frame type
buf.append(msg.utf8().data(), msg.utf8().length());
buf.append('\xff'); // frame end
if (!m_handle) {
m_unhandledBufferSize += buf.size();
return false;
}
return m_handle->send(buf.data(), buf.size());
}
unsigned long WebSocketChannel::bufferedAmount() const
{
LOG(Network, "WebSocketChannel %p bufferedAmount", this);
if (!m_handle)
return m_unhandledBufferSize;
return m_handle->bufferedAmount();
}
void WebSocketChannel::close()
{
LOG(Network, "WebSocketChannel %p close", this);
if (m_handle)
m_handle->close(); // will call didClose()
}
void WebSocketChannel::disconnect()
{
LOG(Network, "WebSocketChannel %p disconnect", this);
m_client = 0;
if (m_handle)
m_handle->close();
}
void WebSocketChannel::didOpen(SocketStreamHandle* handle)
{
LOG(Network, "WebSocketChannel %p didOpen", this);
ASSERT(handle == m_handle);
const CString& handshakeMessage = m_handshake.clientHandshakeMessage();
if (!handle->send(handshakeMessage.data(), handshakeMessage.length())) {
LOG(Network, "Error in sending handshake message.");
handle->close();
}
}
void WebSocketChannel::didClose(SocketStreamHandle* handle)
{
LOG(Network, "WebSocketChannel %p didClose", this);
ASSERT(handle == m_handle || !m_handle);
if (m_handle) {
m_unhandledBufferSize = handle->bufferedAmount();
WebSocketChannelClient* client = m_client;
m_client = 0;
m_handle = 0;
if (client)
client->didClose();
}
deref();
}
void WebSocketChannel::didReceiveData(SocketStreamHandle* handle, const char* data, int len)
{
LOG(Network, "WebSocketChannel %p didReceiveData %d", this, len);
ASSERT(handle == m_handle);
if (!appendToBuffer(data, len)) {
handle->close();
return;
}
if (!m_client) {
handle->close();
return;
}
if (m_handshake.mode() != WebSocketHandshake::Connected) {
int headerLength = m_handshake.readServerHandshake(m_buffer, m_bufferSize);
if (headerLength <= 0)
return;
switch (m_handshake.mode()) {
case WebSocketHandshake::Connected:
if (!m_handshake.serverSetCookie().isEmpty()) {
if (m_context->isDocument()) {
Document* document = static_cast<Document*>(m_context);
if (cookiesEnabled(document)) {
ExceptionCode ec; // Exception (for sandboxed documents) ignored.
document->setCookie(m_handshake.serverSetCookie(), ec);
}
}
}
// FIXME: handle set-cookie2.
LOG(Network, "WebSocketChannel %p connected", this);
m_client->didConnect();
break;
default:
LOG(Network, "WebSocketChannel %p connection failed", this);
handle->close();
return;
}
skipBuffer(headerLength);
if (!m_buffer)
return;
LOG(Network, "remaining in read buf %ul", m_bufferSize);
}
const char* nextFrame = m_buffer;
const char* p = m_buffer;
const char* end = p + m_bufferSize;
while (p < end) {
unsigned char frameByte = static_cast<unsigned char>(*p++);
if ((frameByte & 0x80) == 0x80) {
int length = 0;
while (p < end) {
if (length > std::numeric_limits<int>::max() / 128) {
LOG(Network, "frame length overflow %d", length);
handle->close();
return;
}
char msgByte = *p;
length = length * 128 + (msgByte & 0x7f);
++p;
if (!(msgByte & 0x80))
break;
}
if (p + length < end) {
p += length;
nextFrame = p;
} else
break;
} else {
const char* msgStart = p;
while (p < end && *p != '\xff')
++p;
if (p < end && *p == '\xff') {
if (frameByte == 0x00)
m_client->didReceiveMessage(String::fromUTF8(msgStart, p - msgStart));
++p;
nextFrame = p;
}
}
}
skipBuffer(nextFrame - m_buffer);
}
void WebSocketChannel::didFail(SocketStreamHandle* handle, const SocketStreamError&)
{
LOG(Network, "WebSocketChannel %p didFail", this);
ASSERT(handle == m_handle || !m_handle);
handle->close();
}
void WebSocketChannel::didReceiveAuthenticationChallenge(SocketStreamHandle*, const AuthenticationChallenge&)
{
}
void WebSocketChannel::didCancelAuthenticationChallenge(SocketStreamHandle*, const AuthenticationChallenge&)
{
}
bool WebSocketChannel::appendToBuffer(const char* data, int len)
{
char* newBuffer = 0;
if (tryFastMalloc(m_bufferSize + len).getValue(newBuffer)) {
if (m_buffer)
memcpy(newBuffer, m_buffer, m_bufferSize);
memcpy(newBuffer + m_bufferSize, data, len);
fastFree(m_buffer);
m_buffer = newBuffer;
m_bufferSize += len;
return true;
}
LOG(Network, "Too long WebSocket frame %d", m_bufferSize + len);
return false;
}
void WebSocketChannel::skipBuffer(int len)
{
ASSERT(len <= m_bufferSize);
m_bufferSize -= len;
if (!m_bufferSize) {
fastFree(m_buffer);
m_buffer = 0;
return;
}
memmove(m_buffer, m_buffer + len, m_bufferSize);
}
} // namespace WebCore
#endif // ENABLE(WEB_SOCKETS)
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