actube/src/cw/sock_getifinfo.c
7u83@mail.ru f4ebe841a5 renamed capwap directory to cw.
FossilOrigin-Name: 8a43dd9d05a4cb73210243ddd8df2a26f16c7ef2c4d4e36ab446de1f65d88223
2016-03-03 19:46:20 +00:00

67 lines
1.7 KiB
C

/*
This file is part of libcapwap.
libcapwap is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libcapwap 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with libcapwap. If not, see <http://www.gnu.org/licenses/>.
*/
/**
*@file
*@brief Implementation of sock_getbroadcastaddr
*/
#include <string.h>
#include <ifaddrs.h>
#include "sock.h"
/**
* Get the broadcast adddress
* @param addr address to search
* @param broadcastaddr receives the resulting broadcast address
* @return 1 if successful, 0 if no braodcast address was determined
*/
int sock_getifinfo(const struct sockaddr *addr, char *ifname, struct sockaddr *broadcast,
struct sockaddr *netmask)
{
struct ifaddrs *ifap, *ifa;
if (getifaddrs(&ifap) == -1)
return 0;
int rc = 0;
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (sock_cmpaddr(addr, ifa->ifa_addr, 0))
continue;
if (addr->sa_family == AF_INET ) {
if (broadcast)
memcpy(broadcast, ifa->ifa_broadaddr,
sock_addrlen(ifa->ifa_broadaddr));
if (netmask)
memcpy(netmask, ifa->ifa_netmask,
sock_addrlen(ifa->ifa_netmask));
}
if (ifname)
strcpy(ifname, ifa->ifa_name); //, strlen(ifa->ifa_name));
rc = 1;
break;
}
freeifaddrs(ifap);
return rc;
}