LXR linux/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 */
  19void 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
  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        /*
  38         * TODO: re-add support for sending MIC failure indication
  39         * with all info via nl80211
  40         */
  41}
  42