HostResolver supports optional CNAME lookups.

net/base/address_list.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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/base/address_list.h"
 
 #include <stdlib.h>
 
 #include "base/logging.h"
 #include "net/base/sys_addrinfo.h"
 
@@ skipping 114 matching lines @@
 }
 
 int AddressList::GetPort() const {
   uint16* port_field = GetPortField(data_->head);
   if (!port_field)
     return -1;
 
   return ntohs(*port_field);
 }
 
+bool AddressList::GetCanonicalName(std::string* canonical_name) const {
+  DCHECK(canonical_name);
+  if (!data_->head || !data_->head->ai_canonname)
+    return false;
+  canonical_name->assign(data_->head->ai_canonname);
+  return true;
+}
+
 void AddressList::SetFrom(const AddressList& src, int port) {
   if (src.GetPort() == port) {
     // We can reference the data from |src| directly.
     *this = src;
   } else {
     // Otherwise we need to make a copy in order to change the port number.
     Copy(src.head(), true);
     SetPort(port);
   }
 }
@@ skipping 25 matching lines @@
 AddressList::Data::~Data() {
   // Call either freeaddrinfo(head), or FreeMyAddrinfo(head), depending who
   // created the data.
   if (is_system_created)
     freeaddrinfo(head);
   else
     FreeMyAddrinfo(head);
 }
 
 }  // namespace net