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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 <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <assert.h>
#include <linux/types.h>
#include "netlink.h"
#include "rtnetlink.h"
#include <linux/if.h>
#include "wireless.h"
#include <libdaemon/dlog.h>
#include "util.h"
#include "assocwatch.h"
#include "nlapi.h"
static int handle_wireless_event(int idx, uint8_t *data, int l, int (*cb) (int idx, struct hw_addr *a)) {
struct iw_event *e;
int hs;
struct hw_addr ap;
e = (struct iw_event*) data;
hs = sizeof(struct iw_event)-sizeof(union iwreq_data);
while (l >= sizeof(struct iw_event)) {
if (e->len < hs) {
daemon_log(LOG_ERR, "ASSOCWATCH: Recieved corrupt wireless event\n");
return -1;
}
switch (e->cmd) {
case SIOCGIWAP:
if (e->len < hs + sizeof(struct sockaddr)) {
daemon_log(LOG_ERR, "ASSOCWATCH: Recieved corrupt AP wireless event\n");
return -1;
}
memcpy(ap.addr, e->u.ap_addr.sa_data, ETH_ALEN);
if (cb(idx, is_assoc_ap(&ap) ? &ap : NULL) < 0)
return -1;
return 0;
}
l -= e->len;
e = (struct iw_event*) (((uint8_t*) e) + e->len);
}
return 0;
}
static int callback(struct nlmsghdr *n, void *u) {
int (*cb) (int idx, struct hw_addr *a) = u;
if (n->nlmsg_type == RTM_NEWLINK) {
struct ifinfomsg* ifi;
struct rtattr *a;
int la;
if (n->nlmsg_len < NLMSG_LENGTH(sizeof(struct ifinfomsg))) {
daemon_log(LOG_ERR, "ASSOCWATCH: Corrupt NETLINK message\n");
return -1;
}
ifi = NLMSG_DATA(n);
a = (void*) ifi + NLMSG_ALIGN(sizeof(struct ifinfomsg));
la = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
while (RTA_OK(a, la)) {
if(a->rta_type == IFLA_WIRELESS)
handle_wireless_event(ifi->ifi_index, RTA_DATA(a), RTA_PAYLOAD(a), cb);
a = RTA_NEXT(a, la);
}
}
return 0;
}
int assocwatch_init(int (*cb) (int idx, struct hw_addr *a)) {
return nlapi_register(callback, cb);
}
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