Resolve RFC 6761 localhost names to loopback

net/base/net_util.cc

 // Copyright (c) 2012 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/net_util.h"
 
 #include <errno.h>
 #include <string.h>
 
 #include <algorithm>
@@ skipping 715 matching lines @@
 int GetPortFromSockaddr(const struct sockaddr* address, socklen_t address_len) {
   const uint16_t* port_field = GetPortFieldFromSockaddr(address, address_len);
   if (!port_field)
     return -1;
   return base::NetToHost16(*port_field);
 }
 
 bool IsLocalhost(const std::string& host) {
   if (host == "localhost" || host == "localhost.localdomain" ||
       host == "localhost6" || host == "localhost6.localdomain6" ||
+      host == "localhost." || host == "localhost.localdomain." ||
+      host == "localhost6." || host == "localhost6.localdomain6." ||

[Ryan Sleevi, 2015/06/11 00:34:03]

:( on more .localdomain (these are not reserved by any means)

[estark, 2015/06/11 02:35:32]

Do we need to keep these .localdomain things? Why are they even here?

       IsLocalhostTLD(host))
     return true;
 
   IPAddressNumber ip_number;
   if (ParseIPLiteralToNumber(host, &ip_number)) {
     size_t size = ip_number.size();
     switch (size) {
       case kIPv4AddressSize: {
         IPAddressNumber localhost_prefix;
         localhost_prefix.push_back(127);
@@ skipping 52 matching lines @@
   };
   const std::string& host = url.host();
   for (const char* suffix : kGoogleHostSuffixes) {
     if (EndsWith(host, suffix, false))
       return true;
   }
   return false;
 }
 
 }  // namespace net