Treat IPv6 link local addresses as loopback addresses.

net/base/net_util.cc

 // 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/net_util.h"
 
 #include <algorithm>
 #include <map>
 #include <unicode/regex.h>
 #include <unicode/ucnv.h>
@@ skipping 1813 matching lines @@
   for (struct ifaddrs* interface = interface_addr;
        interface != NULL;
        interface = interface->ifa_next) {
     if (!(IFF_UP & interface->ifa_flags))
       continue;
     if (IFF_LOOPBACK & interface->ifa_flags)
       continue;
     const struct sockaddr* addr = interface->ifa_addr;
     if (!addr)
       continue;
+    if (addr->sa_family == AF_INET6) {
+      // Safe cast since this is AF_INET6.
+      const struct sockaddr_in6* addr_in6 =
+          reinterpret_cast<const struct sockaddr_in6*>(addr);
+      const struct in6_addr* sin6_addr = &addr_in6->sin6_addr;
+      if (IN6_IS_ADDR_LOOPBACK(sin6_addr) || IN6_IS_ADDR_LINKLOCAL(sin6_addr))
+        continue;
+    }
     if (addr->sa_family != AF_INET6 && addr->sa_family != AF_INET)
       continue;
 
     result = false;
     break;
   }
   freeifaddrs(interface_addr);
   return result;
 #else
   NOTIMPLEMENTED();
@@ skipping 134 matching lines @@
 }
 
 int GetPortFromAddrinfo(const struct addrinfo* info) {
   uint16* port_field = GetPortFieldFromAddrinfo(info);
   if (!port_field)
     return -1;
   return ntohs(*port_field);
 }
 
 }  // namespace net