Add specific error codes for when SOCKS connect fails....

net/http/http_network_transaction.cc

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_network_transaction.h"
 
 #include "base/format_macros.h"
 #include "base/scoped_ptr.h"
 #include "base/compiler_specific.h"
 #include "base/field_trial.h"
@@ skipping 1567 matching lines @@
   switch (error) {
     case ERR_NAME_NOT_RESOLVED:
     case ERR_INTERNET_DISCONNECTED:
     case ERR_ADDRESS_UNREACHABLE:
     case ERR_CONNECTION_CLOSED:
     case ERR_CONNECTION_RESET:
     case ERR_CONNECTION_REFUSED:
     case ERR_CONNECTION_ABORTED:
     case ERR_TIMED_OUT:
     case ERR_TUNNEL_CONNECTION_FAILED:
+    case ERR_SOCKS_CONNECTION_FAILED:
       break;
+    case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
+      // Remap the SOCKS-specific "host unreachable" error to a more
+      // generic error code (This way consumers like the link doctor
+      // can substitute the error page).
+      //
+      // Note that if the host resolving was done by the
+      // SOCSK5 proxy, we can't differentiate between a proxy-side
+      // "host not found" versus a proxy-side "address unreachable" error, and
+      // will report both of these failures as ERR_ADDRESS_UNREACHABLE.
+      return ERR_ADDRESS_UNREACHABLE;
     default:
       return error;
   }
 
   if (request_->load_flags & LOAD_BYPASS_PROXY) {
     return error;
   }
 
   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
       request_->url, &proxy_info_, &io_callback_, &pac_request_, load_log_);
@@ skipping 279 matching lines @@
   AuthChallengeInfo* auth_info = new AuthChallengeInfo;
   auth_info->is_proxy = target == HttpAuth::AUTH_PROXY;
   auth_info->host_and_port = ASCIIToWide(GetHostAndPort(auth_origin));
   auth_info->scheme = ASCIIToWide(auth_handler_[target]->scheme());
   // TODO(eroman): decode realm according to RFC 2047.
   auth_info->realm = ASCIIToWide(auth_handler_[target]->realm());
   response_.auth_challenge = auth_info;
 }
 
 }  // namespace net