a3b8b0569f
Define a new nl80211 event, NL80211_CMD_MICHAEL_MIC_FAILURE, to be used to notify user space about locally detected Michael MIC failures. This matches with the MLME-MICHAELMICFAILURE.indication() primitive. Since we do not actually have TSC in the skb anymore when mac80211_ev_michael_mic_failure() is called, that function is changed to take in the TSC as an optional parameter instead of as a requirement to include the TSC after the hdr field (which we did not really follow). For now, TSC is not included in the events from mac80211, but it could be added at some point. Signed-off-by: Jouni Malinen <j@w1.fi> Signed-off-by: John W. Linville <linville@tuxdriver.com>
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* mac80211 - events
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*/
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#include <net/iw_handler.h>
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#include "ieee80211_i.h"
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/*
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* Indicate a failed Michael MIC to userspace. If the caller knows the TSC of
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* the frame that generated the MIC failure (i.e., if it was provided by the
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* driver or is still in the frame), it should provide that information.
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*/
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void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
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struct ieee80211_hdr *hdr, const u8 *tsc)
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{
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union iwreq_data wrqu;
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char *buf = kmalloc(128, GFP_ATOMIC);
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if (buf) {
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/* TODO: needed parameters: count, key type, TSC */
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sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
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"keyid=%d %scast addr=%pM)",
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keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
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hdr->addr2);
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = strlen(buf);
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wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
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kfree(buf);
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}
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cfg80211_michael_mic_failure(sdata->dev, hdr->addr2,
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(hdr->addr1[0] & 0x01) ?
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NL80211_KEYTYPE_GROUP :
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NL80211_KEYTYPE_PAIRWISE,
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keyidx, tsc);
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}
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