56 lines
1.4 KiB
C
56 lines
1.4 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 libcapwap. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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*@file
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*@brief Implementation of sock_getbroadcastaddr
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*/
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#include <string.h>
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#include <ifaddrs.h>
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#include "sock.h"
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/**
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* Get the broadcast adddress
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* @param addr address to search
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* @param broadcastaddr receives the resulting broadcast address
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* @return 1 if successful, 0 if no braodcast address was determined
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*/
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int sock_getbroadcastaddr(const struct sockaddr * addr,struct sockaddr * broadcastaddr)
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{
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struct ifaddrs *ifap,*ifa;
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int rc;
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if ( getifaddrs(&ifap)==-1)
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return 0;
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rc=0;
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for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
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if (sock_cmpaddr(addr,ifa->ifa_addr,0))
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continue;
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memcpy (broadcastaddr, ifa->ifa_broadaddr, sock_addrlen(ifa->ifa_broadaddr));
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rc=1;
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break;
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}
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freeifaddrs(ifap);
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return rc;
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}
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