X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-core%2Faddr-util.c;h=979b1b774d901af22abad6a0fa8b0ae8efc3ab89;hb=530fbb59abafb970ef1dd8f61571b13fb0918b23;hp=7b9bb0368657053aa9750ecc3b17e07e59cdb6be;hpb=c3575017e2137ef664e4735bd6f9ff1209653ef3;p=catta

diff --git a/avahi-core/addr-util.c b/avahi-core/addr-util.c
index 7b9bb03..979b1b7 100644
--- a/avahi-core/addr-util.c
+++ b/avahi-core/addr-util.c
@@ -1,18 +1,16 @@
-/* $Id$ */
-
 /***
   This file is part of avahi.
- 
+
   avahi is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.
- 
+
   avahi is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
   Public License for more details.
- 
+
   You should have received a copy of the GNU Lesser General Public
   License along with avahi; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
@@ -23,8 +21,8 @@
 #include <config.h>
 #endif
 
-#include <netinet/in.h>
 #include <sys/types.h>
+#include <netinet/in.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <string.h>
@@ -66,7 +64,7 @@ int avahi_address_is_ipv4_in_ipv6(const AvahiAddress *a) {
         0x00, 0x00, 0x00, 0x00,
         0xFF, 0xFF, 0xFF, 0xFF
     };
-    
+
     assert(a);
 
     if (a->proto != AVAHI_PROTO_INET6)
@@ -75,5 +73,22 @@ int avahi_address_is_ipv4_in_ipv6(const AvahiAddress *a) {
     return memcmp(a->data.ipv6.address, ipv4_in_ipv6, sizeof(ipv4_in_ipv6)) == 0;
 }
 
+#define IPV4LL_NETWORK 0xA9FE0000L
+#define IPV4LL_NETMASK 0xFFFF0000L
+#define IPV6LL_NETWORK 0xFE80
+#define IPV6LL_NETMASK 0xFFC0
 
+int avahi_address_is_link_local(const AvahiAddress *a) {
+    assert(a);
 
+    if (a->proto == AVAHI_PROTO_INET) {
+        uint32_t n = ntohl(a->data.ipv4.address);
+        return (n & IPV4LL_NETMASK) == IPV4LL_NETWORK;
+    }
+    else if (a->proto == AVAHI_PROTO_INET6) {
+        unsigned n = (a->data.ipv6.address[0] << 8) | (a->data.ipv6.address[1] << 0);
+        return (n & IPV6LL_NETMASK) == IPV6LL_NETWORK;
+    }
+
+    return 0;
+}