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/* $Id$ */
/*
* This file is part of waproamd.
*
* waproamd 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 2 of the License, or
* (at your option) any later version.
*
* waproamd 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 waproamd; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
#include <sys/socket.h>
#include <linux/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <libdaemon/dlog.h>
#include "util.h"
#include "nlapi.h"
static int callback(struct nlmsghdr *n, void *u) {
int (*cb)(int b, int index, unsigned short type, const char *name) = u;
if (n->nlmsg_type == RTM_NEWLINK || n->nlmsg_type == RTM_DELLINK) {
struct rtattr *a;
struct ifinfomsg *i;
char ifname[IFNAMSIZ+1];
int la;
i = NLMSG_DATA(n);
if (n->nlmsg_len < NLMSG_LENGTH(sizeof(struct ifinfomsg))) {
daemon_log(LOG_ERR, "NETLINK: Packet too small or truncated! (2)\n");
return -1;
}
memset(&ifname, 0, sizeof(ifname));
a = (void*) i + NLMSG_ALIGN(sizeof(struct ifinfomsg));
la = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
while (RTA_OK(a, la)) {
if(a->rta_type == IFLA_IFNAME)
strncpy(ifname, RTA_DATA(a), MIN(RTA_PAYLOAD(a), IFNAMSIZ));
a = RTA_NEXT(a, la);
}
if (cb(n->nlmsg_type == RTM_NEWLINK, i->ifi_index, i->ifi_type, ifname[0] ? ifname : NULL) < 0)
return -1;
}
return 0;
}
int ifmonitor_init(int (*cb) (int b, int index, unsigned short type, const char *name)) {
return nlapi_register(callback, cb);
}
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