AU: Set connection timeout to 30 seconds.

libcurl_http_fetcher.cc

 // Copyright (c) 2009 The Chromium OS 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 "update_engine/libcurl_http_fetcher.h"
 
 #include <algorithm>
 #include <string>
 
 #include <base/logging.h>
@@ skipping 104 matching lines @@
 
   // If the connection drops under 10 bytes/sec for 3 minutes, reconnect.
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_LOW_SPEED_LIMIT, 10),
            CURLE_OK);
   // Use a smaller timeout on official builds, larger for dev. Dev users
   // want a longer timeout b/c they may be waiting on the dev server to
   // build an image.
   const int kTimeout = IsOfficialBuild() ? 90 : 3 * 60;
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_LOW_SPEED_TIME, kTimeout),
            CURLE_OK);
+  CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_CONNECTTIMEOUT, 30),
+           CURLE_OK);
 
   // By default, libcurl doesn't follow redirections. Allow up to
   // |kMaxRedirects| redirections.
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_FOLLOWLOCATION, 1), CURLE_OK);
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_MAXREDIRS, kMaxRedirects),
            CURLE_OK);
 
   // Security lock-down in official builds: makes sure that peer certificate
   // verification is enabled, restricts the set of trusted certificates,
   // restricts protocols to HTTPS, restricts ciphers to HIGH.
@@ skipping 322 matching lines @@
 void LibcurlHttpFetcher::GetHttpResponseCode() {
   long http_response_code = 0;
   if (curl_easy_getinfo(curl_handle_,
                         CURLINFO_RESPONSE_CODE,
                         &http_response_code) == CURLE_OK) {
     http_response_code_ = static_cast<int>(http_response_code);
   }
 }
 
 }  // namespace chromeos_update_engine