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/*
* libjingle
* Copyright 2004--2006, 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-inl.h"
#include "talk/xmpp/xmppclientsettings.h"
#include "talk/base/proxydetect.h"
using namespace talk_base;
enum { MSG_TIMEOUT = SignalThread::ST_MSG_FIRST_AVAILABLE };
const talk_base::ProxyType TEST_ORDER[] = {
talk_base::PROXY_HTTPS, /*talk_base::PROXY_SOCKS5,*/ talk_base::PROXY_UNKNOWN
};
AutoDetectProxy::AutoDetectProxy(const std::string& user_agent)
: agent_(user_agent), socket_(NULL), next_(0)
{
}
AutoDetectProxy::~AutoDetectProxy() {
delete socket_;
}
void AutoDetectProxy::DoWork() {
if (!server_url_.empty()) {
LOG(LS_INFO) << "GetProxySettingsForUrl(" << server_url_ << ") - start";
GetProxySettingsForUrl(agent_.c_str(), server_url_.c_str(), proxy_, true);
LOG(LS_INFO) << "GetProxySettingsForUrl - stop";
}
talk_base::Url<char> url(proxy_.address.IPAsString());
if (url.valid()) {
LOG(LS_WARNING) << "AutoDetectProxy removing http prefix on proxy host";
proxy_.address.SetIP(url.server());
}
if (proxy_.type == talk_base::PROXY_UNKNOWN) {
//LOG(LS_INFO) << "Proxy classification start";
Next();
// Process I/O until Stop()
Thread::Current()->ProcessMessages(kForever);
}
}
void AutoDetectProxy::OnMessage(Message *msg) {
if (MSG_TIMEOUT == msg->message_id) {
OnCloseEvent(socket_, ETIMEDOUT);
} else {
SignalThread::OnMessage(msg);
}
}
void AutoDetectProxy::Next() {
if (TEST_ORDER[next_] >= talk_base::PROXY_UNKNOWN) {
Complete(talk_base::PROXY_UNKNOWN);
return;
}
LOG(LS_VERBOSE) << "AutoDetectProxy connecting to "
<< proxy_.address.ToString();
if (socket_) {
Thread::Current()->Clear(this, MSG_TIMEOUT);
socket_->Close();
Thread::Current()->Dispose(socket_);
socket_ = NULL;
}
socket_ = Thread::Current()->socketserver()->CreateAsyncSocket(SOCK_STREAM);
socket_->SignalConnectEvent.connect(this, &AutoDetectProxy::OnConnectEvent);
socket_->SignalReadEvent.connect(this, &AutoDetectProxy::OnReadEvent);
socket_->SignalCloseEvent.connect(this, &AutoDetectProxy::OnCloseEvent);
socket_->Connect(proxy_.address);
// Timeout after 2 seconds
Thread::Current()->PostDelayed(2000, this, MSG_TIMEOUT);
}
void AutoDetectProxy::Complete(talk_base::ProxyType type) {
Thread::Current()->Clear(this, MSG_TIMEOUT);
socket_->Close();
proxy_.type = type;
talk_base::LoggingSeverity sev
= (proxy_.type == talk_base::PROXY_UNKNOWN)
? talk_base::LS_ERROR : talk_base::LS_VERBOSE;
LOG_V(sev) << "AutoDetectProxy detected " << proxy_.address.ToString()
<< " as type " << proxy_.type;
Thread::Current()->MessageQueue::Stop();
}
void AutoDetectProxy::OnConnectEvent(talk_base::AsyncSocket * socket) {
std::string probe;
switch (TEST_ORDER[next_]) {
case talk_base::PROXY_HTTPS:
probe.assign("\005\001"
"CONNECT www.google.com:443 HTTP/1.0\r\n"
"User-Agent: ");
probe.append(agent_);
probe.append("\r\n"
"Host: www.google.com\r\n"
"Content-Length: 0\r\n"
"Proxy-Connection: Keep-Alive\r\n"
"\r\n");
//probe = "CONNECT www.google.com:443 HTTP/1.0\r\n\r\n";
break;
case talk_base::PROXY_SOCKS5:
probe.assign("\005\001\000", 3);
break;
}
LOG(LS_VERBOSE) << "AutoDetectProxy probing type " << TEST_ORDER[next_]
<< " sending " << probe.size() << " bytes";
socket_->Send(probe.data(), probe.size());
}
void AutoDetectProxy::OnReadEvent(talk_base::AsyncSocket * socket) {
char data[257];
int len = socket_->Recv(data, 256);
if (len > 0) {
data[len] = 0;
LOG(LS_VERBOSE) << "AutoDetectProxy read " << len << " bytes";
}
switch (TEST_ORDER[next_]) {
case talk_base::PROXY_HTTPS:
if ((len >= 2) && (data[0] == '\x05')) {
Complete(talk_base::PROXY_SOCKS5);
return;
}
if ((len >= 5) && (strncmp(data, "HTTP/", 5) == 0)) {
Complete(talk_base::PROXY_HTTPS);
return;
}
break;
case talk_base::PROXY_SOCKS5:
if ((len >= 2) && (data[0] == '\x05')) {
Complete(talk_base::PROXY_SOCKS5);
return;
}
break;
}
++next_;
Next();
}
void AutoDetectProxy::OnCloseEvent(talk_base::AsyncSocket * socket, int error) {
LOG(LS_VERBOSE) << "AutoDetectProxy closed with error: " << error;
++next_;
Next();
}
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