28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
291 lines
9.3 KiB
C++
291 lines
9.3 KiB
C++
/*
|
|
* libjingle
|
|
* Copyright 2004--2005, 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/nethelpers.h"
|
|
|
|
namespace talk_base {
|
|
|
|
static const ProxyType TEST_ORDER[] = {
|
|
PROXY_HTTPS, PROXY_SOCKS5, PROXY_UNKNOWN
|
|
};
|
|
|
|
static const int kSavedStringLimit = 128;
|
|
|
|
static void SaveStringToStack(char *dst,
|
|
const std::string &src,
|
|
size_t dst_size) {
|
|
strncpy(dst, src.c_str(), dst_size - 1);
|
|
dst[dst_size - 1] = '\0';
|
|
}
|
|
|
|
AutoDetectProxy::AutoDetectProxy(const std::string& user_agent)
|
|
: agent_(user_agent), resolver_(NULL), socket_(NULL), next_(0) {
|
|
}
|
|
|
|
AutoDetectProxy::~AutoDetectProxy() {
|
|
if (resolver_) {
|
|
resolver_->Destroy(false);
|
|
}
|
|
}
|
|
|
|
void AutoDetectProxy::DoWork() {
|
|
// TODO: Try connecting to server_url without proxy first here?
|
|
if (!server_url_.empty()) {
|
|
LOG(LS_INFO) << "GetProxySettingsForUrl(" << server_url_ << ") - start";
|
|
GetProxyForUrl(agent_.c_str(), server_url_.c_str(), &proxy_);
|
|
LOG(LS_INFO) << "GetProxySettingsForUrl - stop";
|
|
}
|
|
Url<char> url(proxy_.address.HostAsURIString());
|
|
if (url.valid()) {
|
|
LOG(LS_WARNING) << "AutoDetectProxy removing http prefix on proxy host";
|
|
proxy_.address.SetIP(url.host());
|
|
}
|
|
LOG(LS_INFO) << "AutoDetectProxy found proxy at " << proxy_.address;
|
|
if (proxy_.type == PROXY_UNKNOWN) {
|
|
LOG(LS_INFO) << "AutoDetectProxy initiating proxy classification";
|
|
Next();
|
|
// Process I/O until Stop()
|
|
Thread::Current()->ProcessMessages(kForever);
|
|
// Clean up the autodetect socket, from the thread that created it
|
|
delete socket_;
|
|
}
|
|
// TODO: If we found a proxy, try to use it to verify that it
|
|
// works by sending a request to server_url. This could either be
|
|
// done here or by the HttpPortAllocator.
|
|
}
|
|
|
|
void AutoDetectProxy::OnMessage(Message *msg) {
|
|
if (MSG_TIMEOUT == msg->message_id) {
|
|
OnCloseEvent(socket_, ETIMEDOUT);
|
|
} else {
|
|
// This must be the ST_MSG_WORKER_DONE message that deletes the
|
|
// AutoDetectProxy object. We have observed crashes within this stack that
|
|
// seem to be highly reproducible for a small subset of users and thus are
|
|
// probably correlated with a specific proxy setting, so copy potentially
|
|
// relevant information onto the stack to make it available in Windows
|
|
// minidumps.
|
|
|
|
// Save the user agent and the number of auto-detection passes that we
|
|
// needed.
|
|
char agent[kSavedStringLimit];
|
|
SaveStringToStack(agent, agent_, sizeof agent);
|
|
|
|
int next = next_;
|
|
|
|
// Now the detected proxy config (minus the password field, which could be
|
|
// sensitive).
|
|
ProxyType type = proxy().type;
|
|
|
|
char address_hostname[kSavedStringLimit];
|
|
SaveStringToStack(address_hostname,
|
|
proxy().address.hostname(),
|
|
sizeof address_hostname);
|
|
|
|
IPAddress address_ip = proxy().address.ipaddr();
|
|
|
|
uint16 address_port = proxy().address.port();
|
|
|
|
char autoconfig_url[kSavedStringLimit];
|
|
SaveStringToStack(autoconfig_url,
|
|
proxy().autoconfig_url,
|
|
sizeof autoconfig_url);
|
|
|
|
bool autodetect = proxy().autodetect;
|
|
|
|
char bypass_list[kSavedStringLimit];
|
|
SaveStringToStack(bypass_list, proxy().bypass_list, sizeof bypass_list);
|
|
|
|
char username[kSavedStringLimit];
|
|
SaveStringToStack(username, proxy().username, sizeof username);
|
|
|
|
SignalThread::OnMessage(msg);
|
|
|
|
// Log the gathered data at a log level that will never actually be enabled
|
|
// so that the compiler is forced to retain the data on the stack.
|
|
LOG(LS_SENSITIVE) << agent << " " << next << " " << type << " "
|
|
<< address_hostname << " " << address_ip << " "
|
|
<< address_port << " " << autoconfig_url << " "
|
|
<< autodetect << " " << bypass_list << " " << username;
|
|
}
|
|
}
|
|
|
|
void AutoDetectProxy::OnResolveResult(SignalThread* thread) {
|
|
if (thread != resolver_) {
|
|
return;
|
|
}
|
|
int error = resolver_->error();
|
|
if (error == 0) {
|
|
LOG(LS_VERBOSE) << "Resolved " << proxy_.address << " to "
|
|
<< resolver_->address();
|
|
proxy_.address = resolver_->address();
|
|
DoConnect();
|
|
} else {
|
|
LOG(LS_INFO) << "Failed to resolve " << resolver_->address();
|
|
resolver_->Destroy(false);
|
|
resolver_ = NULL;
|
|
proxy_.address = SocketAddress();
|
|
Thread::Current()->Post(this, MSG_TIMEOUT);
|
|
}
|
|
}
|
|
|
|
void AutoDetectProxy::Next() {
|
|
if (TEST_ORDER[next_] >= PROXY_UNKNOWN) {
|
|
Complete(PROXY_UNKNOWN);
|
|
return;
|
|
}
|
|
|
|
LOG(LS_VERBOSE) << "AutoDetectProxy connecting to "
|
|
<< proxy_.address.ToSensitiveString();
|
|
|
|
if (socket_) {
|
|
Thread::Current()->Clear(this, MSG_TIMEOUT);
|
|
socket_->Close();
|
|
Thread::Current()->Dispose(socket_);
|
|
socket_ = NULL;
|
|
}
|
|
int timeout = 2000;
|
|
if (proxy_.address.IsUnresolvedIP()) {
|
|
// Launch an asyncresolver. This thread will spin waiting for it.
|
|
timeout += 2000;
|
|
if (!resolver_) {
|
|
resolver_ = new AsyncResolver();
|
|
}
|
|
resolver_->set_address(proxy_.address);
|
|
resolver_->SignalWorkDone.connect(this,
|
|
&AutoDetectProxy::OnResolveResult);
|
|
resolver_->Start();
|
|
} else {
|
|
DoConnect();
|
|
}
|
|
Thread::Current()->PostDelayed(timeout, this, MSG_TIMEOUT);
|
|
}
|
|
|
|
void AutoDetectProxy::DoConnect() {
|
|
if (resolver_) {
|
|
resolver_->Destroy(false);
|
|
resolver_ = NULL;
|
|
}
|
|
socket_ =
|
|
Thread::Current()->socketserver()->CreateAsyncSocket(
|
|
proxy_.address.family(), SOCK_STREAM);
|
|
if (!socket_) {
|
|
LOG(LS_VERBOSE) << "Unable to create socket for " << proxy_.address;
|
|
return;
|
|
}
|
|
socket_->SignalConnectEvent.connect(this, &AutoDetectProxy::OnConnectEvent);
|
|
socket_->SignalReadEvent.connect(this, &AutoDetectProxy::OnReadEvent);
|
|
socket_->SignalCloseEvent.connect(this, &AutoDetectProxy::OnCloseEvent);
|
|
socket_->Connect(proxy_.address);
|
|
}
|
|
|
|
void AutoDetectProxy::Complete(ProxyType type) {
|
|
Thread::Current()->Clear(this, MSG_TIMEOUT);
|
|
if (socket_) {
|
|
socket_->Close();
|
|
}
|
|
|
|
proxy_.type = type;
|
|
LoggingSeverity sev = (proxy_.type == PROXY_UNKNOWN) ? LS_ERROR : LS_INFO;
|
|
LOG_V(sev) << "AutoDetectProxy detected "
|
|
<< proxy_.address.ToSensitiveString()
|
|
<< " as type " << proxy_.type;
|
|
|
|
Thread::Current()->Quit();
|
|
}
|
|
|
|
void AutoDetectProxy::OnConnectEvent(AsyncSocket * socket) {
|
|
std::string probe;
|
|
|
|
switch (TEST_ORDER[next_]) {
|
|
case PROXY_HTTPS:
|
|
probe.assign("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");
|
|
break;
|
|
case PROXY_SOCKS5:
|
|
probe.assign("\005\001\000", 3);
|
|
break;
|
|
default:
|
|
ASSERT(false);
|
|
return;
|
|
}
|
|
|
|
LOG(LS_VERBOSE) << "AutoDetectProxy probing type " << TEST_ORDER[next_]
|
|
<< " sending " << probe.size() << " bytes";
|
|
socket_->Send(probe.data(), probe.size());
|
|
}
|
|
|
|
void AutoDetectProxy::OnReadEvent(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 PROXY_HTTPS:
|
|
if ((len >= 2) && (data[0] == '\x05')) {
|
|
Complete(PROXY_SOCKS5);
|
|
return;
|
|
}
|
|
if ((len >= 5) && (strncmp(data, "HTTP/", 5) == 0)) {
|
|
Complete(PROXY_HTTPS);
|
|
return;
|
|
}
|
|
break;
|
|
case PROXY_SOCKS5:
|
|
if ((len >= 2) && (data[0] == '\x05')) {
|
|
Complete(PROXY_SOCKS5);
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
ASSERT(false);
|
|
return;
|
|
}
|
|
|
|
++next_;
|
|
Next();
|
|
}
|
|
|
|
void AutoDetectProxy::OnCloseEvent(AsyncSocket * socket, int error) {
|
|
LOG(LS_VERBOSE) << "AutoDetectProxy closed with error: " << error;
|
|
++next_;
|
|
Next();
|
|
}
|
|
|
|
} // namespace talk_base
|