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Inintial commit, function to get the primary interface

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FossilOrigin-Name: 27ef73383a5f6ac39becb3f0a6149149eedb6276b489ab49ab19a7ed41bfedeb
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root@ac.supos.de 2014-07-14 20:41:33 +00:00
parent 4e127cf1b9
commit 1f06cbd432
1 changed files with 53 additions and 0 deletions
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53
src/capwap/sock_get_primary_if.c Normal file
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/*
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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <ifaddrs.h>
#include <net/if.h>
#include "sock.h"
char * sock_get_primary_if(int family)
{
struct ifaddrs *ifap,*ifa;
char * r = 0;
getifaddrs(&ifap);
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_flags & IFF_LOOPBACK){
continue;
}
if (ifa->ifa_addr->sa_family != family)
continue;
r = malloc(strlen(ifa->ifa_name)+1);
if (r)
strcpy(r,ifa->ifa_name);
break;
}
freeifaddrs(ifap);
return r;
}