package/madwifi/patches/309-micfail_detect.patch

   1 Index: madwifi-ng-r2420-20070602/ath/if_ath.c
   2 ===================================================================
   3 --- madwifi-ng-r2420-20070602.orig/ath/if_ath.c 2007-06-04 13:21:58.895023264 +0200
   4 +++ madwifi-ng-r2420-20070602/ath/if_ath.c      2007-06-04 13:21:59.133986936 +0200
   5 @@ -5602,6 +5602,7 @@
   6         u_int phyerr;
   7         u_int processed = 0, early_stop = 0;
   8         u_int rx_limit = dev->quota;
   9 +       u_int mic_fail = 0;
  10
  11         /* Let the 802.11 layer know about the new noise floor */
  12         sc->sc_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
  13 @@ -5696,25 +5697,7 @@
  14                         }
  15                         if (rs->rs_status & HAL_RXERR_MIC) {
  16                                 sc->sc_stats.ast_rx_badmic++;
  17 -                               /*
  18 -                                * Do minimal work required to hand off
  19 -                                * the 802.11 header for notification.
  20 -                                */
  21 -                               /* XXX frag's and QoS frames */
  22 -                               len = rs->rs_datalen;
  23 -                               if (len >= sizeof (struct ieee80211_frame)) {
  24 -                                       bus_dma_sync_single(sc->sc_bdev,
  25 -                                           bf->bf_skbaddr, len,
  26 -                                           BUS_DMA_FROMDEVICE);
  27 -#if 0
  28 -/* XXX revalidate MIC, lookup ni to find VAP */
  29 -                                       ieee80211_notify_michael_failure(ic,
  30 -                                           (struct ieee80211_frame *) skb->data,
  31 -                                           sc->sc_splitmic ?
  32 -                                               rs->rs_keyix - 32 : rs->rs_keyix
  33 -                                       );
  34 -#endif
  35 -                               }
  36 +                               mic_fail = 1;
  37                         }
  38                         /*
  39                          * Reject error frames if we have no vaps that
  40 @@ -5772,8 +5755,9 @@
  41                 /*
  42                  * Finished monitor mode handling, now reject
  43                  * error frames before passing to other vaps
  44 +                * Ignore MIC failures here, as we need to recheck them
  45                  */
  46 -               if (rs->rs_status != 0) {
  47 +               if (rs->rs_status & ~(HAL_RXERR_MIC | HAL_RXERR_DECRYPT)) {
  48                         dev_kfree_skb(skb);
  49                         skb = NULL;
  50                         goto rx_next;
  51 @@ -5804,6 +5788,27 @@
  52                                    sc->sc_hwmap[rs->rs_rate].ieeerate,
  53                                    rs->rs_rssi);
  54
  55 +               /* MIC failure. Drop the packet in any case */
  56 +               if (mic_fail) {
  57 +                       /* Drop control frames which are reported with mic error */
  58 +                   if ((((struct ieee80211_frame *)skb->data)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) {
  59 +                               dev_kfree_skb(skb);
  60 +                               skb = NULL;
  61 +                               mic_fail = 0;
  62 +                               goto rx_next;
  63 +                       }
  64 +                       ni = ieee80211_find_rxnode(ic,
  65 +                               (const struct ieee80211_frame_min *) skb->data);
  66 +                       if (ni != NULL) {
  67 +                               ieee80211_check_mic(ni, skb);
  68 +                               ieee80211_unref_node(&ni);
  69 +                       }
  70 +                       dev_kfree_skb_any(skb);
  71 +                       skb = NULL;
  72 +                       mic_fail = 0;
  73 +                       goto rx_next;
  74 +               }
  75 +
  76                 /*
  77                  * Locate the node for sender, track state, and then
  78                  * pass the (referenced) node up to the 802.11 layer
  79 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c
  80 ===================================================================
  81 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_ccmp.c     2007-06-04 13:21:57.936169032 +0200
  82 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c  2007-06-04 13:21:59.134986784 +0200
  83 @@ -78,7 +78,7 @@
  84  static int ccmp_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
  85  static int ccmp_decap(struct ieee80211_key *, struct sk_buff *, int);
  86  static int ccmp_enmic(struct ieee80211_key *, struct sk_buff *, int);
  87 -static int ccmp_demic(struct ieee80211_key *, struct sk_buff *, int);
  88 +static int ccmp_demic(struct ieee80211_key *, struct sk_buff *, int, int);
  89
  90  static const struct ieee80211_cipher ccmp = {
  91         .ic_name        = "AES-CCM",
  92 @@ -304,7 +304,7 @@
  93   * Verify and strip MIC from the frame.
  94   */
  95  static int
  96 -ccmp_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen)
  97 +ccmp_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen, int force)
  98  {
  99         return 1;
 100  }
 101 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h
 102 ===================================================================
 103 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto.h  2007-06-04 13:21:53.000919304 +0200
 104 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h       2007-06-04 13:21:59.134986784 +0200
 105 @@ -145,7 +145,7 @@
 106         int (*ic_encap)(struct ieee80211_key *, struct sk_buff *, u_int8_t);
 107         int (*ic_decap)(struct ieee80211_key *, struct sk_buff *, int);
 108         int (*ic_enmic)(struct ieee80211_key *, struct sk_buff *, int);
 109 -       int (*ic_demic)(struct ieee80211_key *, struct sk_buff *, int);
 110 +       int (*ic_demic)(struct ieee80211_key *, struct sk_buff *, int, int);
 111  };
 112  extern const struct ieee80211_cipher ieee80211_cipher_none;
 113
 114 @@ -163,10 +163,10 @@
 115   */
 116  static __inline int
 117  ieee80211_crypto_demic(struct ieee80211vap *vap, struct ieee80211_key *k,
 118 -       struct sk_buff *skb, int hdrlen)
 119 +       struct sk_buff *skb, int hdrlen, int force)
 120  {
 121         const struct ieee80211_cipher *cip = k->wk_cipher;
 122 -       return (cip->ic_miclen > 0 ? cip->ic_demic(k, skb, hdrlen) : 1);
 123 +       return (cip->ic_miclen > 0 ? cip->ic_demic(k, skb, hdrlen, force) : 1);
 124  }
 125
 126  /*
 127 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c
 128 ===================================================================
 129 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_none.c     2007-06-04 13:21:53.005918544 +0200
 130 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c  2007-06-04 13:21:59.134986784 +0200
 131 @@ -52,7 +52,7 @@
 132  static int none_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
 133  static int none_decap(struct ieee80211_key *, struct sk_buff *, int);
 134  static int none_enmic(struct ieee80211_key *, struct sk_buff *, int);
 135 -static int none_demic(struct ieee80211_key *, struct sk_buff *, int);
 136 +static int none_demic(struct ieee80211_key *, struct sk_buff *, int, int);
 137
 138  const struct ieee80211_cipher ieee80211_cipher_none = {
 139         .ic_name        = "NONE",
 140 @@ -137,7 +137,7 @@
 141  }
 142
 143  static int
 144 -none_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen)
 145 +none_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen, int force)
 146  {
 147         struct ieee80211vap *vap = k->wk_private;
 148
 149 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c
 150 ===================================================================
 151 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_tkip.c     2007-06-04 13:21:53.011917632 +0200
 152 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c  2007-06-04 13:21:59.135986632 +0200
 153 @@ -57,7 +57,7 @@
 154  static int tkip_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
 155  static int tkip_enmic(struct ieee80211_key *, struct sk_buff *, int);
 156  static int tkip_decap(struct ieee80211_key *, struct sk_buff *, int);
 157 -static int tkip_demic(struct ieee80211_key *, struct sk_buff *, int);
 158 +static int tkip_demic(struct ieee80211_key *, struct sk_buff *, int, int);
 159
 160  static const struct ieee80211_cipher tkip  = {
 161         .ic_name        = "TKIP",
 162 @@ -339,7 +339,7 @@
 163   * Verify and strip MIC from the frame.
 164   */
 165  static int
 166 -tkip_demic(struct ieee80211_key *k, struct sk_buff *skb0, int hdrlen)
 167 +tkip_demic(struct ieee80211_key *k, struct sk_buff *skb0, int hdrlen, int force)
 168  {
 169         struct tkip_ctx *ctx = k->wk_private;
 170         struct sk_buff *skb;
 171 @@ -355,7 +355,7 @@
 172         }
 173         wh = (struct ieee80211_frame *) skb0->data;
 174         /* NB: skb left pointing at last in chain */
 175 -       if (k->wk_flags & IEEE80211_KEY_SWMIC) {
 176 +       if ((k->wk_flags & IEEE80211_KEY_SWMIC) || force) {
 177                 struct ieee80211vap *vap = ctx->tc_vap;
 178                 u8 mic[IEEE80211_WEP_MICLEN];
 179                 u8 mic0[IEEE80211_WEP_MICLEN];
 180 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c
 181 ===================================================================
 182 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_wep.c      2007-06-04 13:21:53.016916872 +0200
 183 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c   2007-06-04 13:21:59.135986632 +0200
 184 @@ -54,7 +54,7 @@
 185  static int wep_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
 186  static int wep_decap(struct ieee80211_key *, struct sk_buff *, int);
 187  static int wep_enmic(struct ieee80211_key *, struct sk_buff *, int);
 188 -static int wep_demic(struct ieee80211_key *, struct sk_buff *, int);
 189 +static int wep_demic(struct ieee80211_key *, struct sk_buff *, int, int);
 190
 191  static const struct ieee80211_cipher wep = {
 192         .ic_name        = "WEP",
 193 @@ -244,7 +244,7 @@
 194   * Verify and strip MIC from the frame.
 195   */
 196  static int
 197 -wep_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen)
 198 +wep_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen, int force)
 199  {
 200         return 1;
 201  }
 202 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_input.c
 203 ===================================================================
 204 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_input.c   2007-06-04 13:21:58.897022960 +0200
 205 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_input.c        2007-06-04 13:21:59.137986328 +0200
 206 @@ -632,7 +632,7 @@
 207                  * Next strip any MSDU crypto bits.
 208                  */
 209                 if (key != NULL &&
 210 -                   !ieee80211_crypto_demic(vap, key, skb, hdrspace)) {
 211 +                   !ieee80211_crypto_demic(vap, key, skb, hdrspace, 0)) {
 212                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 213                                 ni->ni_macaddr, "data", "%s", "demic error");
 214                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 215 @@ -3730,6 +3730,47 @@
 216  }
 217  #endif
 218
 219 +/*
 220 + * Process a frame w/ hw detected MIC failure.
 221 + * The frame will be dropped in any case.
 222 + */
 223 +void
 224 +ieee80211_check_mic(struct ieee80211_node *ni, struct sk_buff *skb)
 225 +{
 226 +       struct ieee80211vap *vap = ni->ni_vap;
 227 +
 228 +       struct ieee80211_frame *wh;
 229 +       struct ieee80211_key *key;
 230 +       int hdrspace;
 231 +       struct ieee80211com *ic = vap->iv_ic;
 232 +
 233 +       if (skb->len < sizeof(struct ieee80211_frame_min)) {
 234 +               IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 235 +                   ni->ni_macaddr, NULL,
 236 +                   "too short (1): len %u", skb->len);
 237 +               vap->iv_stats.is_rx_tooshort++;
 238 +               return;
 239 +       }
 240 +
 241 +       wh = (struct ieee80211_frame *)skb->data;
 242 +
 243 +       hdrspace = ieee80211_hdrspace(ic, wh);
 244 +       key = ieee80211_crypto_decap(ni, skb, hdrspace);
 245 +       if (key == NULL) {
 246 +               /* NB: stats+msgs handled in crypto_decap */
 247 +               IEEE80211_NODE_STAT(ni, rx_wepfail);
 248 +               return;
 249 +       }
 250 +
 251 +       if (!ieee80211_crypto_demic(vap, key, skb, hdrspace, 1)) {
 252 +               IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 253 +                       ni->ni_macaddr, "data", "%s", "demic error");
 254 +                       IEEE80211_NODE_STAT(ni, rx_demicfail);
 255 +       }
 256 +       return;
 257 +}
 258 +EXPORT_SYMBOL(ieee80211_check_mic);
 259 +
 260  #ifdef IEEE80211_DEBUG
 261  /*
 262   * Debugging support.
 263 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h
 264 ===================================================================
 265 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_proto.h   2007-06-04 13:21:58.134138936 +0200
 266 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h        2007-06-04 13:21:59.137986328 +0200
 267 @@ -91,6 +91,7 @@
 268  void ieee80211_set11gbasicrates(struct ieee80211_rateset *, enum ieee80211_phymode);
 269  enum ieee80211_phymode ieee80211_get11gbasicrates(struct ieee80211_rateset *);
 270  void ieee80211_send_pspoll(struct ieee80211_node *);
 271 +void ieee80211_check_mic(struct ieee80211_node *, struct sk_buff *);
 272
 273  /*
 274   * Return the size of the 802.11 header for a management or data frame.
 275 Index: madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c
 276 ===================================================================
 277 --- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_linux.c   2007-06-04 13:21:57.745198064 +0200
 278 +++ madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c        2007-06-04 13:21:59.137986328 +0200
 279 @@ -291,8 +291,8 @@
 280         /* TODO: needed parameters: count, keyid, key type, src address, TSC */
 281         snprintf(buf, sizeof(buf), "%s(keyid=%d %scast addr=%s)", tag,
 282                 k->wk_keyix,
 283 -               IEEE80211_IS_MULTICAST(wh->i_addr1) ?  "broad" : "uni",
 284 -               ether_sprintf(wh->i_addr1));
 285 +               IEEE80211_IS_MULTICAST(wh->i_addr2) ?  "broad" : "uni",
 286 +               ether_sprintf(wh->i_addr2));
 287         memset(&wrqu, 0, sizeof(wrqu));
 288         wrqu.data.length = strlen(buf);
 289         wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);