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 <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 */
  20void 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}
  44