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. If the caller knows the TSC of
  16  * the frame that generated the MIC failure (i.e., if it was provided by the
  17  * driver or is still in the frame), it should provide that information.
  18  */
  19 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
  20                                      struct ieee80211_hdr *hdr, const u8 *tsc)
  21 {
  22         union iwreq_data wrqu;
  23         char *buf = kmalloc(128, GFP_ATOMIC);
  24
  25         if (buf) {
  26                 /* TODO: needed parameters: count, key type, TSC */
  27                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
  28                         "keyid=%d %scast addr=%pM)",
  29                         keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
  30                         hdr->addr2);
  31                 memset(&wrqu, 0, sizeof(wrqu));
  32                 wrqu.data.length = strlen(buf);
  33                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
  34                 kfree(buf);
  35         }
  36
  37         cfg80211_michael_mic_failure(sdata->dev, hdr->addr2,
  38                                      (hdr->addr1[0] & 0x01) ?
  39                                      NL80211_KEYTYPE_GROUP :
  40                                      NL80211_KEYTYPE_PAIRWISE,
  41                                      keyidx, tsc);
  42 }