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/*
Perl ARP Extension
Get the MAC address of an interface
BSD code
Programmed by Bastian Ballmann
Last update: 09.02.2006
Fixed for FreeBSD by Niels Bakker
Last update: 2007-12-26
This program is free software; you can redistribute
it and/or modify it under the terms of the
GNU General Public License version 2 as published
by the Free Software Foundation.
This program 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.
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/ethernet.h>
int get_mac_bsd(u_char *dev, char *mac)
{
struct ifaddrs *iface, *iffirst;
if(strlen(mac) > 0)
strcpy(mac,"unknown");
else
return -1;
if(strlen(dev) == 0)
return -1;
strcpy(mac,"unknown");
if (getifaddrs(&iface))
return -1;
iffirst = iface;
while(iface->ifa_next != NULL)
{
if(!strcmp(iface->ifa_name,dev))
{
if (iface->ifa_addr->sa_family == AF_LINK)
{
struct sockaddr_dl *sdl = (struct sockaddr_dl *) iface->ifa_addr;
sprintf(mac, "%s",
ether_ntoa((struct ether_addr *)LLADDR(sdl)));
break;
}
}
iface = iface->ifa_next;
}
freeifaddrs(iffirst);
return 0;
}
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