wlantest/rx_data.c

   1 /*
   2  * Received Data frame processing
   3  * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16 #include <linux/if_ether.h>
  17
  18 #include "utils/common.h"
  19 #include "common/defs.h"
  20 #include "common/ieee802_11_defs.h"
  21 #include "wlantest.h"
  22
  23
  24 static const char * data_stype(u16 stype)
  25 {
  26         switch (stype) {
  27         case WLAN_FC_STYPE_DATA:
  28                 return "DATA";
  29         case WLAN_FC_STYPE_DATA_CFACK:
  30                 return "DATA-CFACK";
  31         case WLAN_FC_STYPE_DATA_CFPOLL:
  32                 return "DATA-CFPOLL";
  33         case WLAN_FC_STYPE_DATA_CFACKPOLL:
  34                 return "DATA-CFACKPOLL";
  35         case WLAN_FC_STYPE_NULLFUNC:
  36                 return "NULLFUNC";
  37         case WLAN_FC_STYPE_CFACK:
  38                 return "CFACK";
  39         case WLAN_FC_STYPE_CFPOLL:
  40                 return "CFPOLL";
  41         case WLAN_FC_STYPE_CFACKPOLL:
  42                 return "CFACKPOLL";
  43         case WLAN_FC_STYPE_QOS_DATA:
  44                 return "QOSDATA";
  45         case WLAN_FC_STYPE_QOS_DATA_CFACK:
  46                 return "QOSDATA-CFACK";
  47         case WLAN_FC_STYPE_QOS_DATA_CFPOLL:
  48                 return "QOSDATA-CFPOLL";
  49         case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL:
  50                 return "QOSDATA-CFACKPOLL";
  51         case WLAN_FC_STYPE_QOS_NULL:
  52                 return "QOS-NULL";
  53         case WLAN_FC_STYPE_QOS_CFPOLL:
  54                 return "QOS-CFPOLL";
  55         case WLAN_FC_STYPE_QOS_CFACKPOLL:
  56                 return "QOS-CFACKPOLL";
  57         }
  58         return "??";
  59 }
  60
  61
  62 static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
  63                         const u8 *sta_addr, const u8 *dst, const u8 *src,
  64                         u16 ethertype, const u8 *data, size_t len, int prot,
  65                         const u8 *peer_addr)
  66 {
  67         switch (ethertype) {
  68         case ETH_P_PAE:
  69                 rx_data_eapol(wt, dst, src, data, len, prot);
  70                 break;
  71         case ETH_P_IP:
  72                 rx_data_ip(wt, bssid, sta_addr, dst, src, data, len,
  73                            peer_addr);
  74                 break;
  75         case 0x890d:
  76                 rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len);
  77                 break;
  78         }
  79 }
  80
  81
  82 static void rx_data_process(struct wlantest *wt, const u8 *bssid,
  83                             const u8 *sta_addr,
  84                             const u8 *dst, const u8 *src,
  85                             const u8 *data, size_t len, int prot,
  86                             const u8 *peer_addr)
  87 {
  88         if (len == 0)
  89                 return;
  90
  91         if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
  92                 rx_data_eth(wt, bssid, sta_addr, dst, src,
  93                             WPA_GET_BE16(data + 6), data + 8, len - 8, prot,
  94                             peer_addr);
  95                 return;
  96         }
  97
  98         wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
  99 }
 100
 101
 102 static void rx_data_bss_prot_group(struct wlantest *wt,
 103                                    const struct ieee80211_hdr *hdr,
 104                                    const u8 *qos, const u8 *dst, const u8 *src,
 105                                    const u8 *data, size_t len)
 106 {
 107         struct wlantest_bss *bss;
 108         int keyid;
 109         u8 *decrypted;
 110         size_t dlen;
 111         u8 pn[6];
 112
 113         bss = bss_get(wt, hdr->addr2);
 114         if (bss == NULL)
 115                 return;
 116         if (len < 4) {
 117                 wpa_printf(MSG_INFO, "Too short group addressed data frame");
 118                 return;
 119         }
 120
 121         if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
 122             !(data[3] & 0x20)) {
 123                     wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
 124                                MACSTR " did not have ExtIV bit set to 1",
 125                                MAC2STR(bss->bssid));
 126                     return;
 127         }
 128
 129         if (bss->group_cipher == WPA_CIPHER_TKIP) {
 130                 if (data[3] & 0x1f) {
 131                         wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
 132                                    "non-zero reserved bit",
 133                                    MAC2STR(bss->bssid));
 134                 }
 135                 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
 136                         wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
 137                                    "incorrect WEPSeed[1] (was 0x%x, expected "
 138                                    "0x%x)",
 139                                    MAC2STR(bss->bssid), data[1],
 140                                    (data[0] | 0x20) & 0x7f);
 141                 }
 142         } else if (bss->group_cipher == WPA_CIPHER_CCMP) {
 143                 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
 144                         wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
 145                                    "non-zero reserved bit",
 146                                    MAC2STR(bss->bssid));
 147                 }
 148         }
 149
 150         keyid = data[3] >> 6;
 151         if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40)
 152         {
 153                 wpa_printf(MSG_MSGDUMP, "No GTK known to decrypt the frame "
 154                            "(A2=" MACSTR " KeyID=%d)",
 155                            MAC2STR(hdr->addr2), keyid);
 156                 return;
 157         }
 158
 159         if (bss->group_cipher == WPA_CIPHER_TKIP)
 160                 tkip_get_pn(pn, data);
 161         else if (bss->group_cipher == WPA_CIPHER_WEP40)
 162                 goto skip_replay_det;
 163         else
 164                 ccmp_get_pn(pn, data);
 165         if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) {
 166                 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
 167                 wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
 168                            " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
 169                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 170                            MAC2STR(hdr->addr3),
 171                            WLAN_GET_SEQ_SEQ(seq_ctrl),
 172                            WLAN_GET_SEQ_FRAG(seq_ctrl));
 173                 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
 174                 wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
 175         }
 176
 177 skip_replay_det:
 178         if (bss->group_cipher == WPA_CIPHER_TKIP)
 179                 decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
 180                                          &dlen);
 181         else if (bss->group_cipher == WPA_CIPHER_WEP40)
 182                 decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
 183         else
 184                 decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
 185                                          &dlen);
 186         if (decrypted) {
 187                 rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
 188                                 dlen, 1, NULL);
 189                 os_memcpy(bss->rsc[keyid], pn, 6);
 190                 write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
 191                                      decrypted, dlen);
 192         }
 193         os_free(decrypted);
 194 }
 195
 196
 197 static void rx_data_bss_prot(struct wlantest *wt,
 198                              const struct ieee80211_hdr *hdr, const u8 *qos,
 199                              const u8 *dst, const u8 *src, const u8 *data,
 200                              size_t len)
 201 {
 202         struct wlantest_bss *bss;
 203         struct wlantest_sta *sta, *sta2;
 204         int keyid;
 205         u16 fc = le_to_host16(hdr->frame_control);
 206         u8 *decrypted;
 207         size_t dlen;
 208         int tid;
 209         u8 pn[6], *rsc;
 210         struct wlantest_tdls *tdls = NULL;
 211         const u8 *tk = NULL;
 212
 213         if (hdr->addr1[0] & 0x01) {
 214                 rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
 215                 return;
 216         }
 217
 218         if (fc & WLAN_FC_TODS) {
 219                 bss = bss_get(wt, hdr->addr1);
 220                 if (bss == NULL)
 221                         return;
 222                 sta = sta_get(bss, hdr->addr2);
 223                 if (sta)
 224                         sta->counters[WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
 225         } else if (fc & WLAN_FC_FROMDS) {
 226                 bss = bss_get(wt, hdr->addr2);
 227                 if (bss == NULL)
 228                         return;
 229                 sta = sta_get(bss, hdr->addr1);
 230         } else {
 231                 bss = bss_get(wt, hdr->addr3);
 232                 if (bss == NULL)
 233                         return;
 234                 sta = sta_find(bss, hdr->addr2);
 235                 sta2 = sta_find(bss, hdr->addr1);
 236                 if (sta == NULL || sta2 == NULL)
 237                         return;
 238                 dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list)
 239                 {
 240                         if ((tdls->init == sta && tdls->resp == sta2) ||
 241                             (tdls->init == sta2 && tdls->resp == sta)) {
 242                                 if (!tdls->link_up)
 243                                         wpa_printf(MSG_DEBUG, "TDLS: Link not "
 244                                                    "up, but Data frame seen");
 245                                 tk = tdls->tpk.tk;
 246                                 break;
 247                         }
 248                 }
 249         }
 250         if ((sta == NULL ||
 251              (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) &&
 252             tk == NULL) {
 253                 wpa_printf(MSG_MSGDUMP, "No PTK known to decrypt the frame");
 254                 return;
 255         }
 256
 257         if (len < 4) {
 258                 wpa_printf(MSG_INFO, "Too short encrypted data frame");
 259                 return;
 260         }
 261
 262         if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
 263             !(data[3] & 0x20)) {
 264                     wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
 265                                MACSTR " did not have ExtIV bit set to 1",
 266                                MAC2STR(src));
 267                     return;
 268         }
 269
 270         if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
 271                 if (data[3] & 0x1f) {
 272                         wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
 273                                    "non-zero reserved bit",
 274                                    MAC2STR(hdr->addr2));
 275                 }
 276                 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
 277                         wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
 278                                    "incorrect WEPSeed[1] (was 0x%x, expected "
 279                                    "0x%x)",
 280                                    MAC2STR(hdr->addr2), data[1],
 281                                    (data[0] | 0x20) & 0x7f);
 282                 }
 283         } else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) {
 284                 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
 285                         wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
 286                                    "non-zero reserved bit",
 287                                    MAC2STR(hdr->addr2));
 288                 }
 289         }
 290
 291         keyid = data[3] >> 6;
 292         if (keyid != 0) {
 293                 wpa_printf(MSG_INFO, "Unexpected non-zero KeyID %d in "
 294                            "individually addressed Data frame from " MACSTR,
 295                            keyid, MAC2STR(hdr->addr2));
 296         }
 297
 298         if (qos)
 299                 tid = qos[0] & 0x0f;
 300         else
 301                 tid = 0;
 302         if (tk) {
 303                 if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0)
 304                         rsc = tdls->rsc_init[tid];
 305                 else
 306                         rsc = tdls->rsc_resp[tid];
 307         } else if (fc & WLAN_FC_TODS)
 308                 rsc = sta->rsc_tods[tid];
 309         else
 310                 rsc = sta->rsc_fromds[tid];
 311
 312
 313         if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP)
 314                 tkip_get_pn(pn, data);
 315         else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
 316                 goto skip_replay_det;
 317         else
 318                 ccmp_get_pn(pn, data);
 319         if (os_memcmp(pn, rsc, 6) <= 0) {
 320                 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
 321                 wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
 322                            " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
 323                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 324                            MAC2STR(hdr->addr3),
 325                            WLAN_GET_SEQ_SEQ(seq_ctrl),
 326                            WLAN_GET_SEQ_FRAG(seq_ctrl));
 327                 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
 328                 wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
 329         }
 330
 331 skip_replay_det:
 332         if (tk)
 333                 decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
 334         else if (sta->pairwise_cipher == WPA_CIPHER_TKIP)
 335                 decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
 336         else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
 337                 decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
 338         else
 339                 decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
 340         if (decrypted) {
 341                 u16 fc = le_to_host16(hdr->frame_control);
 342                 const u8 *peer_addr = NULL;
 343                 if (!(fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)))
 344                         peer_addr = hdr->addr1;
 345                 rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
 346                                 dlen, 1, peer_addr);
 347                 os_memcpy(rsc, pn, 6);
 348                 write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
 349                                      decrypted, dlen);
 350         }
 351         os_free(decrypted);
 352 }
 353
 354
 355 static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr,
 356                         const u8 *qos, const u8 *dst, const u8 *src,
 357                         const u8 *data, size_t len)
 358 {
 359         u16 fc = le_to_host16(hdr->frame_control);
 360         int prot = !!(fc & WLAN_FC_ISWEP);
 361
 362         if (qos) {
 363                 u8 ack = (qos[0] & 0x60) >> 5;
 364                 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
 365                            " len=%u%s tid=%u%s%s",
 366                            MAC2STR(src), MAC2STR(dst), (unsigned int) len,
 367                            prot ? " Prot" : "", qos[0] & 0x0f,
 368                            (qos[0] & 0x10) ? " EOSP" : "",
 369                            ack == 0 ? "" :
 370                            (ack == 1 ? " NoAck" :
 371                             (ack == 2 ? " NoExpAck" : " BA")));
 372         } else {
 373                 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
 374                            " len=%u%s",
 375                            MAC2STR(src), MAC2STR(dst), (unsigned int) len,
 376                            prot ? " Prot" : "");
 377         }
 378
 379         if (prot)
 380                 rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
 381         else {
 382                 const u8 *bssid, *sta_addr, *peer_addr;
 383                 if (fc & WLAN_FC_TODS) {
 384                         bssid = hdr->addr1;
 385                         sta_addr = hdr->addr2;
 386                         peer_addr = NULL;
 387                 } else if (fc & WLAN_FC_FROMDS) {
 388                         bssid = hdr->addr2;
 389                         sta_addr = hdr->addr1;
 390                         peer_addr = NULL;
 391                 } else {
 392                         bssid = hdr->addr3;
 393                         sta_addr = hdr->addr2;
 394                         peer_addr = hdr->addr1;
 395                 }
 396                 rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0,
 397                                 peer_addr);
 398         }
 399 }
 400
 401
 402 static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid,
 403                                        const u8 *sta1_addr,
 404                                        const u8 *sta2_addr)
 405 {
 406         struct wlantest_bss *bss;
 407         struct wlantest_sta *sta1, *sta2;
 408         struct wlantest_tdls *tdls;
 409
 410         bss = bss_find(wt, bssid);
 411         if (bss == NULL)
 412                 return NULL;
 413         sta1 = sta_find(bss, sta1_addr);
 414         if (sta1 == NULL)
 415                 return NULL;
 416         sta2 = sta_find(bss, sta2_addr);
 417         if (sta2 == NULL)
 418                 return NULL;
 419
 420         dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
 421                 if ((tdls->init == sta1 && tdls->resp == sta2) ||
 422                     (tdls->init == sta2 && tdls->resp == sta1))
 423                         return tdls;
 424         }
 425
 426         return NULL;
 427 }
 428
 429
 430 static void add_direct_link(struct wlantest *wt, const u8 *bssid,
 431                             const u8 *sta1_addr, const u8 *sta2_addr)
 432 {
 433         struct wlantest_tdls *tdls;
 434
 435         tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
 436         if (tdls == NULL)
 437                 return;
 438
 439         if (tdls->link_up)
 440                 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++;
 441         else
 442                 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++;
 443 }
 444
 445
 446 static void add_ap_path(struct wlantest *wt, const u8 *bssid,
 447                         const u8 *sta1_addr, const u8 *sta2_addr)
 448 {
 449         struct wlantest_tdls *tdls;
 450
 451         tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
 452         if (tdls == NULL)
 453                 return;
 454
 455         if (tdls->link_up)
 456                 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++;
 457         else
 458                 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
 459 }
 460
 461
 462 void rx_data(struct wlantest *wt, const u8 *data, size_t len)
 463 {
 464         const struct ieee80211_hdr *hdr;
 465         u16 fc, stype;
 466         size_t hdrlen;
 467         const u8 *qos = NULL;
 468
 469         if (len < 24)
 470                 return;
 471
 472         hdr = (const struct ieee80211_hdr *) data;
 473         fc = le_to_host16(hdr->frame_control);
 474         stype = WLAN_FC_GET_STYPE(fc);
 475         hdrlen = 24;
 476         if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
 477             (WLAN_FC_TODS | WLAN_FC_FROMDS))
 478                 hdrlen += ETH_ALEN;
 479         if (stype & 0x08) {
 480                 qos = data + hdrlen;
 481                 hdrlen += 2;
 482         }
 483         if (len < hdrlen)
 484                 return;
 485         wt->rx_data++;
 486
 487         switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
 488         case 0:
 489                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA="
 490                            MACSTR " BSSID=" MACSTR,
 491                            data_stype(WLAN_FC_GET_STYPE(fc)),
 492                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 493                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 494                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 495                            MAC2STR(hdr->addr3));
 496                 add_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2);
 497                 rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
 498                             data + hdrlen, len - hdrlen);
 499                 break;
 500         case WLAN_FC_FROMDS:
 501                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR
 502                            " BSSID=" MACSTR " SA=" MACSTR,
 503                            data_stype(WLAN_FC_GET_STYPE(fc)),
 504                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 505                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 506                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 507                            MAC2STR(hdr->addr3));
 508                 add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
 509                 rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
 510                             data + hdrlen, len - hdrlen);
 511                 break;
 512         case WLAN_FC_TODS:
 513                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR
 514                            " SA=" MACSTR " DA=" MACSTR,
 515                            data_stype(WLAN_FC_GET_STYPE(fc)),
 516                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 517                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 518                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 519                            MAC2STR(hdr->addr3));
 520                 add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2);
 521                 rx_data_bss(wt, hdr, qos, hdr->addr3, hdr->addr2,
 522                             data + hdrlen, len - hdrlen);
 523                 break;
 524         case WLAN_FC_TODS | WLAN_FC_FROMDS:
 525                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA="
 526                            MACSTR " DA=" MACSTR " SA=" MACSTR,
 527                            data_stype(WLAN_FC_GET_STYPE(fc)),
 528                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 529                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 530                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 531                            MAC2STR(hdr->addr3),
 532                            MAC2STR((const u8 *) (hdr + 1)));
 533                 break;
 534         }
 535 }