linux-imx

/*

 * Copyright 2002-2004, Instant802 Networks, Inc.

 * Copyright 2008, Jouni Malinen <j@w1.fi>

 * Copyright (C) 2016-2017 Intel Deutschland GmbH

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/netdevice.h>

#include <linux/types.h>

#include <linux/skbuff.h>

#include <linux/compiler.h>

#include <linux/ieee80211.h>

#include <linux/gfp.h>

#include <asm/unaligned.h>

#include <net/mac80211.h>

#include <crypto/aes.h>

#include <crypto/algapi.h>

​

#include "ieee80211_i.h"

#include "michael.h"

#include "tkip.h"

#include "aes_ccm.h"

#include "aes_cmac.h"

#include "aes_gmac.h"

#include "aes_gcm.h"

#include "wpa.h"

​

ieee80211_tx_result

ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)

{

    u8 *data, *key, *mic;

    size_t data_len;

    unsigned int hdrlen;

    struct ieee80211_hdr *hdr;

    struct sk_buff *skb = tx->skb;

    struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

    int tail;

​

    hdr = (struct ieee80211_hdr *)skb->data;

    if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||

        skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))

        return TX_CONTINUE;

​

    hdrlen = ieee80211_hdrlen(hdr->frame_control);

    if (skb->len < hdrlen)

        return TX_DROP;

​

    data = skb->data + hdrlen;

    data_len = skb->len - hdrlen;

​

    if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {

        /* Need to use software crypto for the test */

        info->control.hw_key = NULL;

    }

​

    if (info->control.hw_key &&

        (info->flags & IEEE80211_TX_CTL_DONTFRAG ||

         ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) &&

        !(tx->key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |

                     IEEE80211_KEY_FLAG_PUT_MIC_SPACE))) {