src/jingle/glue/proxy_resolving_client_socket.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "jingle/glue/proxy_resolving_client_socket.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/bind.h"
   9 #include "base/bind_helpers.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/logging.h"
  12 #include "net/base/io_buffer.h"
  13 #include "net/base/net_errors.h"
  14 #include "net/http/http_network_session.h"
  15 #include "net/socket/client_socket_handle.h"
  16 #include "net/socket/client_socket_pool_manager.h"
  17 #include "net/url_request/url_request_context.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 namespace jingle_glue {
  21
  22 ProxyResolvingClientSocket::ProxyResolvingClientSocket(
  23     net::ClientSocketFactory* socket_factory,
  24     const scoped_refptr<net::URLRequestContextGetter>& request_context_getter,
  25     const net::SSLConfig& ssl_config,
  26     const net::HostPortPair& dest_host_port_pair)
  27         : proxy_resolve_callback_(
  28               base::Bind(&ProxyResolvingClientSocket::ProcessProxyResolveDone,
  29                          base::Unretained(this))),
  30           connect_callback_(
  31               base::Bind(&ProxyResolvingClientSocket::ProcessConnectDone,
  32                          base::Unretained(this))),
  33           ssl_config_(ssl_config),
  34           pac_request_(NULL),
  35           dest_host_port_pair_(dest_host_port_pair),
  36           // Assume that we intend to do TLS on this socket; all
  37           // current use cases do.
  38           proxy_url_("https://" + dest_host_port_pair_.ToString()),
  39           tried_direct_connect_fallback_(false),
  40           bound_net_log_(
  41               net::BoundNetLog::Make(
  42                   request_context_getter->GetURLRequestContext()->net_log(),
  43                   net::NetLog::SOURCE_SOCKET)),
  44           weak_factory_(this) {
  45   DCHECK(request_context_getter.get());
  46   net::URLRequestContext* request_context =
  47       request_context_getter->GetURLRequestContext();
  48   DCHECK(request_context);
  49   DCHECK(!dest_host_port_pair_.host().empty());
  50   DCHECK_GT(dest_host_port_pair_.port(), 0);
  51   DCHECK(proxy_url_.is_valid());
  52
  53   net::HttpNetworkSession::Params session_params;
  54   session_params.client_socket_factory = socket_factory;
  55   session_params.host_resolver = request_context->host_resolver();
  56   session_params.cert_verifier = request_context->cert_verifier();
  57   session_params.transport_security_state =
  58       request_context->transport_security_state();
  59   // TODO(rkn): This is NULL because ServerBoundCertService is not thread safe.
  60   session_params.server_bound_cert_service = NULL;
  61   session_params.proxy_service = request_context->proxy_service();
  62   session_params.ssl_config_service = request_context->ssl_config_service();
  63   session_params.http_auth_handler_factory =
  64       request_context->http_auth_handler_factory();
  65   session_params.network_delegate = request_context->network_delegate();
  66   session_params.http_server_properties =
  67       request_context->http_server_properties();
  68   session_params.net_log = request_context->net_log();
  69
  70   const net::HttpNetworkSession::Params* reference_params =
  71       request_context->GetNetworkSessionParams();
  72   if (reference_params) {
  73     session_params.host_mapping_rules = reference_params->host_mapping_rules;
  74     session_params.ignore_certificate_errors =
  75         reference_params->ignore_certificate_errors;
  76     session_params.http_pipelining_enabled =
  77         reference_params->http_pipelining_enabled;
  78     session_params.testing_fixed_http_port =
  79         reference_params->testing_fixed_http_port;
  80     session_params.testing_fixed_https_port =
  81         reference_params->testing_fixed_https_port;
  82     session_params.trusted_spdy_proxy = reference_params->trusted_spdy_proxy;
  83   }
  84
  85   network_session_ = new net::HttpNetworkSession(session_params);
  86 }
  87
  88 ProxyResolvingClientSocket::~ProxyResolvingClientSocket() {
  89   Disconnect();
  90 }
  91
  92 int ProxyResolvingClientSocket::Read(net::IOBuffer* buf, int buf_len,
  93                                      const net::CompletionCallback& callback) {
  94   if (transport_.get() && transport_->socket())
  95     return transport_->socket()->Read(buf, buf_len, callback);
  96   NOTREACHED();
  97   return net::ERR_SOCKET_NOT_CONNECTED;
  98 }
  99
 100 int ProxyResolvingClientSocket::Write(
 101     net::IOBuffer* buf,
 102     int buf_len,
 103     const net::CompletionCallback& callback) {
 104   if (transport_.get() && transport_->socket())
 105     return transport_->socket()->Write(buf, buf_len, callback);
 106   NOTREACHED();
 107   return net::ERR_SOCKET_NOT_CONNECTED;
 108 }
 109
 110 int ProxyResolvingClientSocket::SetReceiveBufferSize(int32 size) {
 111   if (transport_.get() && transport_->socket())
 112     return transport_->socket()->SetReceiveBufferSize(size);
 113   NOTREACHED();
 114   return net::ERR_SOCKET_NOT_CONNECTED;
 115 }
 116
 117 int ProxyResolvingClientSocket::SetSendBufferSize(int32 size) {
 118   if (transport_.get() && transport_->socket())
 119     return transport_->socket()->SetSendBufferSize(size);
 120   NOTREACHED();
 121   return net::ERR_SOCKET_NOT_CONNECTED;
 122 }
 123
 124 int ProxyResolvingClientSocket::Connect(
 125     const net::CompletionCallback& callback) {
 126   DCHECK(user_connect_callback_.is_null());
 127
 128   tried_direct_connect_fallback_ = false;
 129
 130   // First we try and resolve the proxy.
 131   int status = network_session_->proxy_service()->ResolveProxy(
 132       proxy_url_,
 133       &proxy_info_,
 134       proxy_resolve_callback_,
 135       &pac_request_,
 136       bound_net_log_);
 137   if (status != net::ERR_IO_PENDING) {
 138     // We defer execution of ProcessProxyResolveDone instead of calling it
 139     // directly here for simplicity. From the caller's point of view,
 140     // the connect always happens asynchronously.
 141     base::MessageLoop* message_loop = base::MessageLoop::current();
 142     CHECK(message_loop);
 143     message_loop->PostTask(
 144         FROM_HERE,
 145         base::Bind(&ProxyResolvingClientSocket::ProcessProxyResolveDone,
 146                    weak_factory_.GetWeakPtr(), status));
 147   }
 148   user_connect_callback_ = callback;
 149   return net::ERR_IO_PENDING;
 150 }
 151
 152 void ProxyResolvingClientSocket::RunUserConnectCallback(int status) {
 153   DCHECK_LE(status, net::OK);
 154   net::CompletionCallback user_connect_callback = user_connect_callback_;
 155   user_connect_callback_.Reset();
 156   user_connect_callback.Run(status);
 157 }
 158
 159 // Always runs asynchronously.
 160 void ProxyResolvingClientSocket::ProcessProxyResolveDone(int status) {
 161   pac_request_ = NULL;
 162
 163   DCHECK_NE(status, net::ERR_IO_PENDING);
 164   if (status == net::OK) {
 165     // Remove unsupported proxies from the list.
 166     proxy_info_.RemoveProxiesWithoutScheme(
 167         net::ProxyServer::SCHEME_DIRECT |
 168         net::ProxyServer::SCHEME_HTTP | net::ProxyServer::SCHEME_HTTPS |
 169         net::ProxyServer::SCHEME_SOCKS4 | net::ProxyServer::SCHEME_SOCKS5);
 170
 171     if (proxy_info_.is_empty()) {
 172       // No proxies/direct to choose from. This happens when we don't support
 173       // any of the proxies in the returned list.
 174       status = net::ERR_NO_SUPPORTED_PROXIES;
 175     }
 176   }
 177
 178   // Since we are faking the URL, it is possible that no proxies match our URL.
 179   // Try falling back to a direct connection if we have not tried that before.
 180   if (status != net::OK) {
 181     if (!tried_direct_connect_fallback_) {
 182       tried_direct_connect_fallback_ = true;
 183       proxy_info_.UseDirect();
 184     } else {
 185       CloseTransportSocket();
 186       RunUserConnectCallback(status);
 187       return;
 188     }
 189   }
 190
 191   transport_.reset(new net::ClientSocketHandle);
 192   // Now that we have resolved the proxy, we need to connect.
 193   status = net::InitSocketHandleForRawConnect(
 194       dest_host_port_pair_, network_session_.get(), proxy_info_, ssl_config_,
 195       ssl_config_, net::PRIVACY_MODE_DISABLED, bound_net_log_, transport_.get(),
 196       connect_callback_);
 197   if (status != net::ERR_IO_PENDING) {
 198     // Since this method is always called asynchronously. it is OK to call
 199     // ProcessConnectDone synchronously.
 200     ProcessConnectDone(status);
 201   }
 202 }
 203
 204 void ProxyResolvingClientSocket::ProcessConnectDone(int status) {
 205   if (status != net::OK) {
 206     // If the connection fails, try another proxy.
 207     status = ReconsiderProxyAfterError(status);
 208     // ReconsiderProxyAfterError either returns an error (in which case it is
 209     // not reconsidering a proxy) or returns ERR_IO_PENDING if it is considering
 210     // another proxy.
 211     DCHECK_NE(status, net::OK);
 212     if (status == net::ERR_IO_PENDING)
 213       // Proxy reconsideration pending. Return.
 214       return;
 215     CloseTransportSocket();
 216   } else {
 217     ReportSuccessfulProxyConnection();
 218   }
 219   RunUserConnectCallback(status);
 220 }
 221
 222 // TODO(sanjeevr): This has largely been copied from
 223 // HttpStreamFactoryImpl::Job::ReconsiderProxyAfterError. This should be
 224 // refactored into some common place.
 225 // This method reconsiders the proxy on certain errors. If it does reconsider
 226 // a proxy it always returns ERR_IO_PENDING and posts a call to
 227 // ProcessProxyResolveDone with the result of the reconsideration.
 228 int ProxyResolvingClientSocket::ReconsiderProxyAfterError(int error) {
 229   DCHECK(!pac_request_);
 230   DCHECK_NE(error, net::OK);
 231   DCHECK_NE(error, net::ERR_IO_PENDING);
 232   // A failure to resolve the hostname or any error related to establishing a
 233   // TCP connection could be grounds for trying a new proxy configuration.
 234   //
 235   // Why do this when a hostname cannot be resolved?  Some URLs only make sense
 236   // to proxy servers.  The hostname in those URLs might fail to resolve if we
 237   // are still using a non-proxy config.  We need to check if a proxy config
 238   // now exists that corresponds to a proxy server that could load the URL.
 239   //
 240   switch (error) {
 241     case net::ERR_PROXY_CONNECTION_FAILED:
 242     case net::ERR_NAME_NOT_RESOLVED:
 243     case net::ERR_INTERNET_DISCONNECTED:
 244     case net::ERR_ADDRESS_UNREACHABLE:
 245     case net::ERR_CONNECTION_CLOSED:
 246     case net::ERR_CONNECTION_RESET:
 247     case net::ERR_CONNECTION_REFUSED:
 248     case net::ERR_CONNECTION_ABORTED:
 249     case net::ERR_TIMED_OUT:
 250     case net::ERR_TUNNEL_CONNECTION_FAILED:
 251     case net::ERR_SOCKS_CONNECTION_FAILED:
 252       break;
 253     case net::ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
 254       // Remap the SOCKS-specific "host unreachable" error to a more
 255       // generic error code (this way consumers like the link doctor
 256       // know to substitute their error page).
 257       //
 258       // Note that if the host resolving was done by the SOCSK5 proxy, we can't
 259       // differentiate between a proxy-side "host not found" versus a proxy-side
 260       // "address unreachable" error, and will report both of these failures as
 261       // ERR_ADDRESS_UNREACHABLE.
 262       return net::ERR_ADDRESS_UNREACHABLE;
 263     default:
 264       return error;
 265   }
 266
 267   if (proxy_info_.is_https() && ssl_config_.send_client_cert) {
 268     network_session_->ssl_client_auth_cache()->Remove(
 269         proxy_info_.proxy_server().host_port_pair());
 270   }
 271
 272   int rv = network_session_->proxy_service()->ReconsiderProxyAfterError(
 273       proxy_url_, &proxy_info_, proxy_resolve_callback_, &pac_request_,
 274       bound_net_log_);
 275   if (rv == net::OK || rv == net::ERR_IO_PENDING) {
 276     CloseTransportSocket();
 277   } else {
 278     // If ReconsiderProxyAfterError() failed synchronously, it means
 279     // there was nothing left to fall-back to, so fail the transaction
 280     // with the last connection error we got.
 281     rv = error;
 282   }
 283
 284   // We either have new proxy info or there was an error in falling back.
 285   // In both cases we want to post ProcessProxyResolveDone (in the error case
 286   // we might still want to fall back a direct connection).
 287   if (rv != net::ERR_IO_PENDING) {
 288     base::MessageLoop* message_loop = base::MessageLoop::current();
 289     CHECK(message_loop);
 290     message_loop->PostTask(
 291         FROM_HERE,
 292         base::Bind(&ProxyResolvingClientSocket::ProcessProxyResolveDone,
 293                    weak_factory_.GetWeakPtr(), rv));
 294     // Since we potentially have another try to go (trying the direct connect)
 295     // set the return code code to ERR_IO_PENDING.
 296     rv = net::ERR_IO_PENDING;
 297   }
 298   return rv;
 299 }
 300
 301 void ProxyResolvingClientSocket::ReportSuccessfulProxyConnection() {
 302   network_session_->proxy_service()->ReportSuccess(proxy_info_);
 303 }
 304
 305 void ProxyResolvingClientSocket::Disconnect() {
 306   CloseTransportSocket();
 307   if (pac_request_) {
 308     network_session_->proxy_service()->CancelPacRequest(pac_request_);
 309     pac_request_ = NULL;
 310   }
 311   user_connect_callback_.Reset();
 312 }
 313
 314 bool ProxyResolvingClientSocket::IsConnected() const {
 315   if (!transport_.get() || !transport_->socket())
 316     return false;
 317   return transport_->socket()->IsConnected();
 318 }
 319
 320 bool ProxyResolvingClientSocket::IsConnectedAndIdle() const {
 321   if (!transport_.get() || !transport_->socket())
 322     return false;
 323   return transport_->socket()->IsConnectedAndIdle();
 324 }
 325
 326 int ProxyResolvingClientSocket::GetPeerAddress(
 327     net::IPEndPoint* address) const {
 328   if (transport_.get() && transport_->socket())
 329     return transport_->socket()->GetPeerAddress(address);
 330   NOTREACHED();
 331   return net::ERR_SOCKET_NOT_CONNECTED;
 332 }
 333
 334 int ProxyResolvingClientSocket::GetLocalAddress(
 335     net::IPEndPoint* address) const {
 336   if (transport_.get() && transport_->socket())
 337     return transport_->socket()->GetLocalAddress(address);
 338   NOTREACHED();
 339   return net::ERR_SOCKET_NOT_CONNECTED;
 340 }
 341
 342 const net::BoundNetLog& ProxyResolvingClientSocket::NetLog() const {
 343   if (transport_.get() && transport_->socket())
 344     return transport_->socket()->NetLog();
 345   NOTREACHED();
 346   return bound_net_log_;
 347 }
 348
 349 void ProxyResolvingClientSocket::SetSubresourceSpeculation() {
 350   if (transport_.get() && transport_->socket())
 351     transport_->socket()->SetSubresourceSpeculation();
 352   else
 353     NOTREACHED();
 354 }
 355
 356 void ProxyResolvingClientSocket::SetOmniboxSpeculation() {
 357   if (transport_.get() && transport_->socket())
 358     transport_->socket()->SetOmniboxSpeculation();
 359   else
 360     NOTREACHED();
 361 }
 362
 363 bool ProxyResolvingClientSocket::WasEverUsed() const {
 364   if (transport_.get() && transport_->socket())
 365     return transport_->socket()->WasEverUsed();
 366   NOTREACHED();
 367   return false;
 368 }
 369
 370 bool ProxyResolvingClientSocket::UsingTCPFastOpen() const {
 371   if (transport_.get() && transport_->socket())
 372     return transport_->socket()->UsingTCPFastOpen();
 373   NOTREACHED();
 374   return false;
 375 }
 376
 377 bool ProxyResolvingClientSocket::WasNpnNegotiated() const {
 378   return false;
 379 }
 380
 381 net::NextProto ProxyResolvingClientSocket::GetNegotiatedProtocol() const {
 382   if (transport_.get() && transport_->socket())
 383     return transport_->socket()->GetNegotiatedProtocol();
 384   NOTREACHED();
 385   return net::kProtoUnknown;
 386 }
 387
 388 bool ProxyResolvingClientSocket::GetSSLInfo(net::SSLInfo* ssl_info) {
 389   return false;
 390 }
 391
 392 void ProxyResolvingClientSocket::CloseTransportSocket() {
 393   if (transport_.get() && transport_->socket())
 394     transport_->socket()->Disconnect();
 395   transport_.reset();
 396 }
 397
 398 }  // namespace jingle_glue