actube/src/cw/sock_getbroadcastaddr.c
7u83@mail.ru 847781bf7c moved unsied files, compiles w/o waringins with clang
FossilOrigin-Name: 1189a474bfcc28195d888d7967ccfc50c812f194e1ee19e99d3cb244d666a19a
2018-03-25 08:07:39 +00:00

56 lines
1.4 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_getbroadcastaddr(const struct sockaddr * addr,struct sockaddr * broadcastaddr)
{
struct ifaddrs *ifap,*ifa;
int rc;
if ( getifaddrs(&ifap)==-1)
return 0;
rc=0;
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (sock_cmpaddr(addr,ifa->ifa_addr,0))
continue;
memcpy (broadcastaddr, ifa->ifa_broadaddr, sock_addrlen(ifa->ifa_broadaddr));
rc=1;
break;
}
freeifaddrs(ifap);
return rc;
}