net/mac80211/event.c

   1 /*
   2  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * mac80211 - events
   9  */
  10
  11 #include <linux/netdevice.h>
  12 #include <net/iw_handler.h>
  13 #include "ieee80211_i.h"
  14
  15 /*
  16  * indicate a failed Michael MIC to userspace; the passed packet
  17  * (in the variable hdr) must be long enough to extract the TKIP
  18  * fields like TSC
  19  */
  20 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
  21                                      struct ieee80211_hdr *hdr)
  22 {
  23         union iwreq_data wrqu;
  24         char *buf = kmalloc(128, GFP_ATOMIC);
  25         DECLARE_MAC_BUF(mac);
  26
  27         if (buf) {
  28                 /* TODO: needed parameters: count, key type, TSC */
  29                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
  30                         "keyid=%d %scast addr=%s)",
  31                         keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
  32                         print_mac(mac, hdr->addr2));
  33                 memset(&wrqu, 0, sizeof(wrqu));
  34                 wrqu.data.length = strlen(buf);
  35                 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
  36                 kfree(buf);
  37         }
  38
  39         /*
  40          * TODO: re-add support for sending MIC failure indication
  41          * with all info via nl80211
  42          */
  43 }