forked from jbagg/QtZeroConf
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/***
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This file is part of avahi.
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avahi is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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avahi is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with avahi; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <assert.h>
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#include "addr-util.h"
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AvahiAddress *avahi_address_from_sockaddr(const struct sockaddr* sa, AvahiAddress *ret_addr) {
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assert(sa);
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assert(ret_addr);
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assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
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ret_addr->proto = avahi_af_to_proto(sa->sa_family);
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if (sa->sa_family == AF_INET)
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memcpy(&ret_addr->data.ipv4, &((const struct sockaddr_in*) sa)->sin_addr, sizeof(ret_addr->data.ipv4));
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else
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memcpy(&ret_addr->data.ipv6, &((const struct sockaddr_in6*) sa)->sin6_addr, sizeof(ret_addr->data.ipv6));
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return ret_addr;
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}
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uint16_t avahi_port_from_sockaddr(const struct sockaddr* sa) {
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assert(sa);
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assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
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if (sa->sa_family == AF_INET)
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return ntohs(((const struct sockaddr_in*) sa)->sin_port);
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else
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return ntohs(((const struct sockaddr_in6*) sa)->sin6_port);
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}
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int avahi_address_is_ipv4_in_ipv6(const AvahiAddress *a) {
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static const uint8_t ipv4_in_ipv6[] = {
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF
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};
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assert(a);
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if (a->proto != AVAHI_PROTO_INET6)
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return 0;
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return memcmp(a->data.ipv6.address, ipv4_in_ipv6, sizeof(ipv4_in_ipv6)) == 0;
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}
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#define IPV4LL_NETWORK 0xA9FE0000L
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#define IPV4LL_NETMASK 0xFFFF0000L
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#define IPV6LL_NETWORK 0xFE80
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#define IPV6LL_NETMASK 0xFFC0
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int avahi_address_is_link_local(const AvahiAddress *a) {
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assert(a);
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if (a->proto == AVAHI_PROTO_INET) {
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uint32_t n = ntohl(a->data.ipv4.address);
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return (n & IPV4LL_NETMASK) == IPV4LL_NETWORK;
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}
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else if (a->proto == AVAHI_PROTO_INET6) {
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unsigned n = (a->data.ipv6.address[0] << 8) | (a->data.ipv6.address[1] << 0);
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return (n & IPV6LL_NETMASK) == IPV6LL_NETWORK;
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}
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return 0;
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}
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