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/*
* libjingle
* Copyright 2007, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "talk/base/autodetectproxy.h"
#include "talk/base/httpcommon.h"
#include "talk/base/httpcommon-inl.h"
#include "talk/base/socketadapters.h"
#include "talk/base/ssladapter.h"
#include "talk/base/sslsocketfactory.h"
namespace talk_base {
///////////////////////////////////////////////////////////////////////////////
// ProxySocketAdapter
// TODO: Consider combining AutoDetectProxy and ProxySocketAdapter. I think
// the socket adapter is the more appropriate idiom for automatic proxy
// detection. We may or may not want to combine proxydetect.* as well.
///////////////////////////////////////////////////////////////////////////////
class ProxySocketAdapter : public AsyncSocketAdapter {
public:
ProxySocketAdapter(SslSocketFactory* factory, int family, int type)
: AsyncSocketAdapter(NULL), factory_(factory), family_(family),
type_(type), detect_(NULL) {
}
virtual ~ProxySocketAdapter() {
Close();
}
virtual int Connect(const SocketAddress& addr) {
ASSERT(NULL == detect_);
ASSERT(NULL == socket_);
remote_ = addr;
if (remote_.IsAnyIP() && remote_.hostname().empty()) {
LOG_F(LS_ERROR) << "Empty address";
return SOCKET_ERROR;
}
Url<char> url("/", remote_.HostAsURIString(), remote_.port());
detect_ = new AutoDetectProxy(factory_->agent_);
detect_->set_server_url(url.url());
detect_->SignalWorkDone.connect(this,
&ProxySocketAdapter::OnProxyDetectionComplete);
detect_->Start();
return SOCKET_ERROR;
}
virtual int GetError() const {
if (socket_) {
return socket_->GetError();
}
return detect_ ? EWOULDBLOCK : EADDRNOTAVAIL;
}
virtual int Close() {
if (socket_) {
return socket_->Close();
}
if (detect_) {
detect_->Destroy(false);
detect_ = NULL;
}
return 0;
}
virtual ConnState GetState() const {
if (socket_) {
return socket_->GetState();
}
return detect_ ? CS_CONNECTING : CS_CLOSED;
}
private:
// AutoDetectProxy Slots
void OnProxyDetectionComplete(SignalThread* thread) {
ASSERT(detect_ == thread);
Attach(factory_->CreateProxySocket(detect_->proxy(), family_, type_));
detect_->Release();
detect_ = NULL;
if (0 == AsyncSocketAdapter::Connect(remote_)) {
SignalConnectEvent(this);
} else if (!IsBlockingError(socket_->GetError())) {
SignalCloseEvent(this, socket_->GetError());
}
}
SslSocketFactory* factory_;
int family_;
int type_;
SocketAddress remote_;
AutoDetectProxy* detect_;
};
///////////////////////////////////////////////////////////////////////////////
// SslSocketFactory
///////////////////////////////////////////////////////////////////////////////
Socket* SslSocketFactory::CreateSocket(int type) {
return CreateSocket(AF_INET, type);
}
Socket* SslSocketFactory::CreateSocket(int family, int type) {
return factory_->CreateSocket(family, type);
}
AsyncSocket* SslSocketFactory::CreateAsyncSocket(int type) {
return CreateAsyncSocket(AF_INET, type);
}
AsyncSocket* SslSocketFactory::CreateAsyncSocket(int family, int type) {
if (autodetect_proxy_) {
return new ProxySocketAdapter(this, family, type);
} else {
return CreateProxySocket(proxy_, family, type);
}
}
AsyncSocket* SslSocketFactory::CreateProxySocket(const ProxyInfo& proxy,
int family,
int type) {
AsyncSocket* socket = factory_->CreateAsyncSocket(family, type);
if (!socket)
return NULL;
// Binary logging happens at the lowest level
if (!logging_label_.empty() && binary_mode_) {
socket = new LoggingSocketAdapter(socket, logging_level_,
logging_label_.c_str(), binary_mode_);
}
if (proxy.type) {
AsyncSocket* proxy_socket = 0;
if (proxy_.type == PROXY_SOCKS5) {
proxy_socket = new AsyncSocksProxySocket(socket, proxy.address,
proxy.username, proxy.password);
} else {
// Note: we are trying unknown proxies as HTTPS currently
AsyncHttpsProxySocket* http_proxy =
new AsyncHttpsProxySocket(socket, agent_, proxy.address,
proxy.username, proxy.password);
http_proxy->SetForceConnect(force_connect_ || !hostname_.empty());
proxy_socket = http_proxy;
}
if (!proxy_socket) {
delete socket;
return NULL;
}
socket = proxy_socket; // for our purposes the proxy is now the socket
}
if (!hostname_.empty()) {
if (SSLAdapter* ssl_adapter = SSLAdapter::Create(socket)) {
ssl_adapter->set_ignore_bad_cert(ignore_bad_cert_);
ssl_adapter->StartSSL(hostname_.c_str(), true);
socket = ssl_adapter;
} else {
LOG_F(LS_ERROR) << "SSL unavailable";
}
}
// Regular logging occurs at the highest level
if (!logging_label_.empty() && !binary_mode_) {
socket = new LoggingSocketAdapter(socket, logging_level_,
logging_label_.c_str(), binary_mode_);
}
return socket;
}
///////////////////////////////////////////////////////////////////////////////
} // namespace talk_base
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