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 <net/iw_handler.h>
  12 #include "ieee80211_i.h"
  13
  14 /*
  15  * indicate a failed Michael MIC to userspace; the passed packet
  16  * (in the variable hdr) must be long enough to extract the TKIP
  17  * fields like TSC
  18  */
  19 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
  20                                      struct ieee80211_hdr *hdr)
  21 {
  22         union iwreq_data wrqu;
  23         char *buf = kmalloc(128, GFP_ATOMIC);
  24         DECLARE_MAC_BUF(mac);
  25
  26         if (buf) {
  27                 /* TODO: needed parameters: count, key type, TSC */
  28                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
  29                         "keyid=%d %scast addr=%s)",
  30                         keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
  31                         print_mac(mac, hdr->addr2));
  32                 memset(&wrqu, 0, sizeof(wrqu));
  33                 wrqu.data.length = strlen(buf);
  34                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
  35                 kfree(buf);
  36         }
  37
  38         /*
  39          * TODO: re-add support for sending MIC failure indication
  40          * with all info via nl80211
  41          */
  42 }