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/***
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
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include <assert.h>
#include "addr-util.h"
AvahiAddress *avahi_address_from_sockaddr(const struct sockaddr* sa, AvahiAddress *ret_addr) {
assert(sa);
assert(ret_addr);
assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
ret_addr->proto = avahi_af_to_proto(sa->sa_family);
if (sa->sa_family == AF_INET)
memcpy(&ret_addr->data.ipv4, &((const struct sockaddr_in*) sa)->sin_addr, sizeof(ret_addr->data.ipv4));
else
memcpy(&ret_addr->data.ipv6, &((const struct sockaddr_in6*) sa)->sin6_addr, sizeof(ret_addr->data.ipv6));
return ret_addr;
}
uint16_t avahi_port_from_sockaddr(const struct sockaddr* sa) {
assert(sa);
assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
if (sa->sa_family == AF_INET)
return ntohs(((const struct sockaddr_in*) sa)->sin_port);
else
return ntohs(((const struct sockaddr_in6*) sa)->sin6_port);
}
int avahi_address_is_ipv4_in_ipv6(const AvahiAddress *a) {
static const uint8_t ipv4_in_ipv6[] = {
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF
};
assert(a);
if (a->proto != AVAHI_PROTO_INET6)
return 0;
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;
}
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