diff options
Diffstat (limited to 'avahi-core/addr-util.c')
-rw-r--r-- | avahi-core/addr-util.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/avahi-core/addr-util.c b/avahi-core/addr-util.c index 9e2d1e9..22a2714 100644 --- a/avahi-core/addr-util.c +++ b/avahi-core/addr-util.c @@ -2,17 +2,17 @@ /*** 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 @@ -66,7 +66,7 @@ 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 +75,22 @@ 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; +} |