63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
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This file is part of libcapwap.
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libcapwap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <net/if.h>
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#include <ifaddrs.h>
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#include "sock.h"
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char * sock_get_primary_if(int family)
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{
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struct ifaddrs *ifap,*ifa;
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char * r = 0;
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getifaddrs(&ifap);
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for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
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#ifdef IFF_LOOPBACK
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if (ifa->ifa_flags & IFF_LOOPBACK){
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continue;
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}
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#else
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if (strncmp(ifa->ifa_name,"lo",2)==0)
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continue;
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#endif
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if (ifa->ifa_addr == NULL)
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continue;
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if (ifa->ifa_addr->sa_family != family)
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continue;
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r = malloc(strlen(ifa->ifa_name)+1);
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if (r)
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strcpy(r,ifa->ifa_name);
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break;
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}
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freeifaddrs(ifap);
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return r;
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}
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