wlantest/rx_data.c

   1 /*
   2  * Received Data frame processing
   3  * Copyright (c) 2010-2015, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "common/defs.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "wlantest.h"
  15
  16
  17 static const char * data_stype(u16 stype)
  18 {
  19         switch (stype) {
  20         case WLAN_FC_STYPE_DATA:
  21                 return "DATA";
  22         case WLAN_FC_STYPE_DATA_CFACK:
  23                 return "DATA-CFACK";
  24         case WLAN_FC_STYPE_DATA_CFPOLL:
  25                 return "DATA-CFPOLL";
  26         case WLAN_FC_STYPE_DATA_CFACKPOLL:
  27                 return "DATA-CFACKPOLL";
  28         case WLAN_FC_STYPE_NULLFUNC:
  29                 return "NULLFUNC";
  30         case WLAN_FC_STYPE_CFACK:
  31                 return "CFACK";
  32         case WLAN_FC_STYPE_CFPOLL:
  33                 return "CFPOLL";
  34         case WLAN_FC_STYPE_CFACKPOLL:
  35                 return "CFACKPOLL";
  36         case WLAN_FC_STYPE_QOS_DATA:
  37                 return "QOSDATA";
  38         case WLAN_FC_STYPE_QOS_DATA_CFACK:
  39                 return "QOSDATA-CFACK";
  40         case WLAN_FC_STYPE_QOS_DATA_CFPOLL:
  41                 return "QOSDATA-CFPOLL";
  42         case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL:
  43                 return "QOSDATA-CFACKPOLL";
  44         case WLAN_FC_STYPE_QOS_NULL:
  45                 return "QOS-NULL";
  46         case WLAN_FC_STYPE_QOS_CFPOLL:
  47                 return "QOS-CFPOLL";
  48         case WLAN_FC_STYPE_QOS_CFACKPOLL:
  49                 return "QOS-CFACKPOLL";
  50         }
  51         return "??";
  52 }
  53
  54
  55 static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
  56                         const u8 *sta_addr, const u8 *dst, const u8 *src,
  57                         u16 ethertype, const u8 *data, size_t len, int prot,
  58                         const u8 *peer_addr)
  59 {
  60         switch (ethertype) {
  61         case ETH_P_PAE:
  62                 rx_data_eapol(wt, bssid, sta_addr, dst, src, data, len, prot);
  63                 break;
  64         case ETH_P_IP:
  65                 rx_data_ip(wt, bssid, sta_addr, dst, src, data, len,
  66                            peer_addr);
  67                 break;
  68         case 0x890d:
  69                 rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len);
  70                 break;
  71         }
  72 }
  73
  74
  75 static void rx_data_process(struct wlantest *wt, const u8 *bssid,
  76                             const u8 *sta_addr,
  77                             const u8 *dst, const u8 *src,
  78                             const u8 *data, size_t len, int prot,
  79                             const u8 *peer_addr)
  80 {
  81         if (len == 0)
  82                 return;
  83
  84         if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
  85                 rx_data_eth(wt, bssid, sta_addr, dst, src,
  86                             WPA_GET_BE16(data + 6), data + 8, len - 8, prot,
  87                             peer_addr);
  88                 return;
  89         }
  90
  91         wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
  92 }
  93
  94
  95 static u8 * try_all_ptk(struct wlantest *wt, int pairwise_cipher,
  96                         const struct ieee80211_hdr *hdr,
  97                         const u8 *data, size_t data_len, size_t *decrypted_len)
  98 {
  99         struct wlantest_ptk *ptk;
 100         u8 *decrypted;
 101         int prev_level = wpa_debug_level;
 102
 103         wpa_debug_level = MSG_WARNING;
 104         dl_list_for_each(ptk, &wt->ptk, struct wlantest_ptk, list) {
 105                 unsigned int tk_len = ptk->ptk_len - 32;
 106                 decrypted = NULL;
 107                 if ((pairwise_cipher == WPA_CIPHER_CCMP ||
 108                      pairwise_cipher == 0) && tk_len == 16) {
 109                         decrypted = ccmp_decrypt(ptk->ptk.tk, hdr, data,
 110                                                  data_len, decrypted_len);
 111                 } else if ((pairwise_cipher == WPA_CIPHER_CCMP_256 ||
 112                             pairwise_cipher == 0) && tk_len == 32) {
 113                         decrypted = ccmp_256_decrypt(ptk->ptk.tk, hdr, data,
 114                                                      data_len, decrypted_len);
 115                 } else if ((pairwise_cipher == WPA_CIPHER_GCMP ||
 116                             pairwise_cipher == WPA_CIPHER_GCMP_256 ||
 117                             pairwise_cipher == 0) &&
 118                            (tk_len == 16 || tk_len == 32)) {
 119                         decrypted = gcmp_decrypt(ptk->ptk.tk, tk_len, hdr,
 120                                                  data, data_len, decrypted_len);
 121                 } else if ((pairwise_cipher == WPA_CIPHER_TKIP ||
 122                             pairwise_cipher == 0) && tk_len == 32) {
 123                         decrypted = tkip_decrypt(ptk->ptk.tk, hdr, data,
 124                                                  data_len, decrypted_len);
 125                 }
 126                 if (decrypted) {
 127                         wpa_debug_level = prev_level;
 128                         add_note(wt, MSG_DEBUG, "Found PTK match from list of all known PTKs");
 129                         return decrypted;
 130                 }
 131         }
 132         wpa_debug_level = prev_level;
 133
 134         return NULL;
 135 }
 136
 137
 138 static void rx_data_bss_prot_group(struct wlantest *wt,
 139                                    const struct ieee80211_hdr *hdr,
 140                                    size_t hdrlen,
 141                                    const u8 *qos, const u8 *dst, const u8 *src,
 142                                    const u8 *data, size_t len)
 143 {
 144         struct wlantest_bss *bss;
 145         int keyid;
 146         u8 *decrypted = NULL;
 147         size_t dlen;
 148         u8 pn[6];
 149
 150         bss = bss_get(wt, hdr->addr2);
 151         if (bss == NULL)
 152                 return;
 153         if (len < 4) {
 154                 add_note(wt, MSG_INFO, "Too short group addressed data frame");
 155                 return;
 156         }
 157
 158         if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
 159             !(data[3] & 0x20)) {
 160                 add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
 161                          MACSTR " did not have ExtIV bit set to 1",
 162                          MAC2STR(bss->bssid));
 163                 return;
 164         }
 165
 166         if (bss->group_cipher == WPA_CIPHER_TKIP) {
 167                 if (data[3] & 0x1f) {
 168                         add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
 169                                  " used non-zero reserved bit",
 170                                  MAC2STR(bss->bssid));
 171                 }
 172                 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
 173                         add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
 174                                  " used incorrect WEPSeed[1] (was 0x%x, "
 175                                  "expected 0x%x)",
 176                                  MAC2STR(bss->bssid), data[1],
 177                                  (data[0] | 0x20) & 0x7f);
 178                 }
 179         } else if (bss->group_cipher == WPA_CIPHER_CCMP) {
 180                 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
 181                         add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
 182                                  " used non-zero reserved bit",
 183                                  MAC2STR(bss->bssid));
 184                 }
 185         }
 186
 187         keyid = data[3] >> 6;
 188         if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40)
 189         {
 190                 add_note(wt, MSG_MSGDUMP, "No GTK known to decrypt the frame "
 191                          "(A2=" MACSTR " KeyID=%d)",
 192                          MAC2STR(hdr->addr2), keyid);
 193                 return;
 194         }
 195
 196         if (bss->group_cipher == WPA_CIPHER_TKIP)
 197                 tkip_get_pn(pn, data);
 198         else if (bss->group_cipher == WPA_CIPHER_WEP40)
 199                 goto skip_replay_det;
 200         else
 201                 ccmp_get_pn(pn, data);
 202         if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) {
 203                 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
 204                 add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
 205                          " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u%s",
 206                          MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 207                          MAC2STR(hdr->addr3),
 208                          WLAN_GET_SEQ_SEQ(seq_ctrl),
 209                          WLAN_GET_SEQ_FRAG(seq_ctrl),
 210                          (le_to_host16(hdr->frame_control) & WLAN_FC_RETRY) ?
 211                          " Retry" : "");
 212                 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
 213                 wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
 214         }
 215
 216 skip_replay_det:
 217         if (bss->group_cipher == WPA_CIPHER_TKIP)
 218                 decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
 219                                          &dlen);
 220         else if (bss->group_cipher == WPA_CIPHER_WEP40)
 221                 decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
 222         else if (bss->group_cipher == WPA_CIPHER_CCMP)
 223                 decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
 224                                          &dlen);
 225         else if (bss->group_cipher == WPA_CIPHER_CCMP_256)
 226                 decrypted = ccmp_256_decrypt(bss->gtk[keyid], hdr, data, len,
 227                                              &dlen);
 228         else if (bss->group_cipher == WPA_CIPHER_GCMP ||
 229                  bss->group_cipher == WPA_CIPHER_GCMP_256)
 230                 decrypted = gcmp_decrypt(bss->gtk[keyid], bss->gtk_len[keyid],
 231                                          hdr, data, len, &dlen);
 232
 233         if (decrypted) {
 234                 rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
 235                                 dlen, 1, NULL);
 236                 os_memcpy(bss->rsc[keyid], pn, 6);
 237                 write_pcap_decrypted(wt, (const u8 *) hdr, hdrlen,
 238                                      decrypted, dlen);
 239         } else
 240                 add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
 241         os_free(decrypted);
 242 }
 243
 244
 245 static void rx_data_bss_prot(struct wlantest *wt,
 246                              const struct ieee80211_hdr *hdr, size_t hdrlen,
 247                              const u8 *qos, const u8 *dst, const u8 *src,
 248                              const u8 *data, size_t len)
 249 {
 250         struct wlantest_bss *bss;
 251         struct wlantest_sta *sta, *sta2;
 252         int keyid;
 253         u16 fc = le_to_host16(hdr->frame_control);
 254         u8 *decrypted;
 255         size_t dlen;
 256         int tid;
 257         u8 pn[6], *rsc;
 258         struct wlantest_tdls *tdls = NULL, *found;
 259         const u8 *tk = NULL;
 260         int ptk_iter_done = 0;
 261         int try_ptk_iter = 0;
 262
 263         if (hdr->addr1[0] & 0x01) {
 264                 rx_data_bss_prot_group(wt, hdr, hdrlen, qos, dst, src,
 265                                        data, len);
 266                 return;
 267         }
 268
 269         if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
 270             (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
 271                 bss = bss_find(wt, hdr->addr1);
 272                 if (bss) {
 273                         sta = sta_find(bss, hdr->addr2);
 274                         if (sta)
 275                                 sta->counters[
 276                                         WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
 277                 } else {
 278                         bss = bss_find(wt, hdr->addr2);
 279                         if (!bss)
 280                                 return;
 281                         sta = sta_find(bss, hdr->addr1);
 282                 }
 283         } else if (fc & WLAN_FC_TODS) {
 284                 bss = bss_get(wt, hdr->addr1);
 285                 if (bss == NULL)
 286                         return;
 287                 sta = sta_get(bss, hdr->addr2);
 288                 if (sta)
 289                         sta->counters[WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
 290         } else if (fc & WLAN_FC_FROMDS) {
 291                 bss = bss_get(wt, hdr->addr2);
 292                 if (bss == NULL)
 293                         return;
 294                 sta = sta_get(bss, hdr->addr1);
 295         } else {
 296                 bss = bss_get(wt, hdr->addr3);
 297                 if (bss == NULL)
 298                         return;
 299                 sta = sta_find(bss, hdr->addr2);
 300                 sta2 = sta_find(bss, hdr->addr1);
 301                 if (sta == NULL || sta2 == NULL)
 302                         return;
 303                 found = NULL;
 304                 dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list)
 305                 {
 306                         if ((tdls->init == sta && tdls->resp == sta2) ||
 307                             (tdls->init == sta2 && tdls->resp == sta)) {
 308                                 found = tdls;
 309                                 if (tdls->link_up)
 310                                         break;
 311                         }
 312                 }
 313                 if (found) {
 314                         if (!found->link_up)
 315                                 add_note(wt, MSG_DEBUG,
 316                                          "TDLS: Link not up, but Data "
 317                                          "frame seen");
 318                         tk = found->tpk.tk;
 319                         tdls = found;
 320                 }
 321         }
 322         if ((sta == NULL ||
 323              (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) &&
 324             tk == NULL) {
 325                 add_note(wt, MSG_MSGDUMP, "No PTK known to decrypt the frame");
 326                 if (dl_list_empty(&wt->ptk))
 327                         return;
 328                 try_ptk_iter = 1;
 329         }
 330
 331         if (len < 4) {
 332                 add_note(wt, MSG_INFO, "Too short encrypted data frame");
 333                 return;
 334         }
 335
 336         if (sta == NULL)
 337                 return;
 338         if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
 339             !(data[3] & 0x20)) {
 340                 add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
 341                          MACSTR " did not have ExtIV bit set to 1",
 342                          MAC2STR(src));
 343                 return;
 344         }
 345
 346         if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
 347                 if (data[3] & 0x1f) {
 348                         add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
 349                                  " used non-zero reserved bit",
 350                                  MAC2STR(hdr->addr2));
 351                 }
 352                 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
 353                         add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
 354                                  " used incorrect WEPSeed[1] (was 0x%x, "
 355                                  "expected 0x%x)",
 356                                  MAC2STR(hdr->addr2), data[1],
 357                                  (data[0] | 0x20) & 0x7f);
 358                 }
 359         } else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) {
 360                 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
 361                         add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
 362                                  " used non-zero reserved bit",
 363                                  MAC2STR(hdr->addr2));
 364                 }
 365         }
 366
 367         keyid = data[3] >> 6;
 368         if (keyid != 0) {
 369                 add_note(wt, MSG_INFO, "Unexpected non-zero KeyID %d in "
 370                          "individually addressed Data frame from " MACSTR,
 371                          keyid, MAC2STR(hdr->addr2));
 372         }
 373
 374         if (qos) {
 375                 tid = qos[0] & 0x0f;
 376                 if (fc & WLAN_FC_TODS)
 377                         sta->tx_tid[tid]++;
 378                 else
 379                         sta->rx_tid[tid]++;
 380         } else {
 381                 tid = 0;
 382                 if (fc & WLAN_FC_TODS)
 383                         sta->tx_tid[16]++;
 384                 else
 385                         sta->rx_tid[16]++;
 386         }
 387         if (tk) {
 388                 if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0)
 389                         rsc = tdls->rsc_init[tid];
 390                 else
 391                         rsc = tdls->rsc_resp[tid];
 392         } else if (fc & WLAN_FC_TODS)
 393                 rsc = sta->rsc_tods[tid];
 394         else
 395                 rsc = sta->rsc_fromds[tid];
 396
 397
 398         if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP)
 399                 tkip_get_pn(pn, data);
 400         else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
 401                 goto skip_replay_det;
 402         else
 403                 ccmp_get_pn(pn, data);
 404         if (os_memcmp(pn, rsc, 6) <= 0) {
 405                 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
 406                 add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
 407                          " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u%s",
 408                          MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 409                          MAC2STR(hdr->addr3),
 410                          WLAN_GET_SEQ_SEQ(seq_ctrl),
 411                          WLAN_GET_SEQ_FRAG(seq_ctrl),
 412                          (le_to_host16(hdr->frame_control) &  WLAN_FC_RETRY) ?
 413                          " Retry" : "");
 414                 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
 415                 wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
 416         }
 417
 418 skip_replay_det:
 419         if (tk) {
 420                 if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
 421                         decrypted = ccmp_256_decrypt(tk, hdr, data, len, &dlen);
 422                 else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
 423                          sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
 424                         decrypted = gcmp_decrypt(tk, sta->tk_len, hdr, data,
 425                                                  len, &dlen);
 426                 else
 427                         decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
 428         } else if (sta->pairwise_cipher == WPA_CIPHER_TKIP) {
 429                 decrypted = tkip_decrypt(sta->ptk.tk, hdr, data, len, &dlen);
 430         } else if (sta->pairwise_cipher == WPA_CIPHER_WEP40) {
 431                 decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
 432         } else if (sta->ptk_set) {
 433                 if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
 434                         decrypted = ccmp_256_decrypt(sta->ptk.tk, hdr, data,
 435                                                      len, &dlen);
 436                 else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
 437                          sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
 438                         decrypted = gcmp_decrypt(sta->ptk.tk, sta->tk_len,
 439                                                  hdr, data, len, &dlen);
 440                 else
 441                         decrypted = ccmp_decrypt(sta->ptk.tk, hdr, data, len,
 442                                                  &dlen);
 443         } else {
 444                 decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
 445                                         len, &dlen);
 446                 ptk_iter_done = 1;
 447         }
 448         if (!decrypted && !ptk_iter_done) {
 449                 decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
 450                                         len, &dlen);
 451                 if (decrypted) {
 452                         add_note(wt, MSG_DEBUG, "Current PTK did not work, but found a match from all known PTKs");
 453                 }
 454         }
 455         if (decrypted) {
 456                 u16 fc = le_to_host16(hdr->frame_control);
 457                 const u8 *peer_addr = NULL;
 458                 if (!(fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)))
 459                         peer_addr = hdr->addr1;
 460                 os_memcpy(rsc, pn, 6);
 461                 rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
 462                                 dlen, 1, peer_addr);
 463                 write_pcap_decrypted(wt, (const u8 *) hdr, hdrlen,
 464                                      decrypted, dlen);
 465         } else if (!try_ptk_iter)
 466                 add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
 467         os_free(decrypted);
 468 }
 469
 470
 471 static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr,
 472                         size_t hdrlen, const u8 *qos, const u8 *dst,
 473                         const u8 *src, const u8 *data, size_t len)
 474 {
 475         u16 fc = le_to_host16(hdr->frame_control);
 476         int prot = !!(fc & WLAN_FC_ISWEP);
 477
 478         if (qos) {
 479                 u8 ack = (qos[0] & 0x60) >> 5;
 480                 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
 481                            " len=%u%s tid=%u%s%s",
 482                            MAC2STR(src), MAC2STR(dst), (unsigned int) len,
 483                            prot ? " Prot" : "", qos[0] & 0x0f,
 484                            (qos[0] & 0x10) ? " EOSP" : "",
 485                            ack == 0 ? "" :
 486                            (ack == 1 ? " NoAck" :
 487                             (ack == 2 ? " NoExpAck" : " BA")));
 488         } else {
 489                 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
 490                            " len=%u%s",
 491                            MAC2STR(src), MAC2STR(dst), (unsigned int) len,
 492                            prot ? " Prot" : "");
 493         }
 494
 495         if (prot)
 496                 rx_data_bss_prot(wt, hdr, hdrlen, qos, dst, src, data, len);
 497         else {
 498                 const u8 *bssid, *sta_addr, *peer_addr;
 499                 struct wlantest_bss *bss;
 500
 501                 if (fc & WLAN_FC_TODS) {
 502                         bssid = hdr->addr1;
 503                         sta_addr = hdr->addr2;
 504                         peer_addr = NULL;
 505                 } else if (fc & WLAN_FC_FROMDS) {
 506                         bssid = hdr->addr2;
 507                         sta_addr = hdr->addr1;
 508                         peer_addr = NULL;
 509                 } else {
 510                         bssid = hdr->addr3;
 511                         sta_addr = hdr->addr2;
 512                         peer_addr = hdr->addr1;
 513                 }
 514
 515                 bss = bss_get(wt, bssid);
 516                 if (bss) {
 517                         struct wlantest_sta *sta = sta_get(bss, sta_addr);
 518
 519                         if (sta) {
 520                                 if (qos) {
 521                                         int tid = qos[0] & 0x0f;
 522                                         if (fc & WLAN_FC_TODS)
 523                                                 sta->tx_tid[tid]++;
 524                                         else
 525                                                 sta->rx_tid[tid]++;
 526                                 } else {
 527                                         if (fc & WLAN_FC_TODS)
 528                                                 sta->tx_tid[16]++;
 529                                         else
 530                                                 sta->rx_tid[16]++;
 531                                 }
 532                         }
 533                 }
 534
 535                 rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0,
 536                                 peer_addr);
 537         }
 538 }
 539
 540
 541 static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid,
 542                                        const u8 *sta1_addr,
 543                                        const u8 *sta2_addr)
 544 {
 545         struct wlantest_bss *bss;
 546         struct wlantest_sta *sta1, *sta2;
 547         struct wlantest_tdls *tdls, *found = NULL;
 548
 549         bss = bss_find(wt, bssid);
 550         if (bss == NULL)
 551                 return NULL;
 552         sta1 = sta_find(bss, sta1_addr);
 553         if (sta1 == NULL)
 554                 return NULL;
 555         sta2 = sta_find(bss, sta2_addr);
 556         if (sta2 == NULL)
 557                 return NULL;
 558
 559         dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
 560                 if ((tdls->init == sta1 && tdls->resp == sta2) ||
 561                     (tdls->init == sta2 && tdls->resp == sta1)) {
 562                         found = tdls;
 563                         if (tdls->link_up)
 564                                 break;
 565                 }
 566         }
 567
 568         return found;
 569 }
 570
 571
 572 static void add_direct_link(struct wlantest *wt, const u8 *bssid,
 573                             const u8 *sta1_addr, const u8 *sta2_addr)
 574 {
 575         struct wlantest_tdls *tdls;
 576
 577         tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
 578         if (tdls == NULL)
 579                 return;
 580
 581         if (tdls->link_up)
 582                 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++;
 583         else
 584                 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++;
 585 }
 586
 587
 588 static void add_ap_path(struct wlantest *wt, const u8 *bssid,
 589                         const u8 *sta1_addr, const u8 *sta2_addr)
 590 {
 591         struct wlantest_tdls *tdls;
 592
 593         tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
 594         if (tdls == NULL)
 595                 return;
 596
 597         if (tdls->link_up)
 598                 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++;
 599         else
 600                 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
 601 }
 602
 603
 604 void rx_data(struct wlantest *wt, const u8 *data, size_t len)
 605 {
 606         const struct ieee80211_hdr *hdr;
 607         u16 fc, stype;
 608         size_t hdrlen;
 609         const u8 *qos = NULL;
 610
 611         if (len < 24)
 612                 return;
 613
 614         hdr = (const struct ieee80211_hdr *) data;
 615         fc = le_to_host16(hdr->frame_control);
 616         stype = WLAN_FC_GET_STYPE(fc);
 617         hdrlen = 24;
 618         if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
 619             (WLAN_FC_TODS | WLAN_FC_FROMDS))
 620                 hdrlen += ETH_ALEN;
 621         if (stype & 0x08) {
 622                 qos = data + hdrlen;
 623                 hdrlen += 2;
 624         }
 625         if (len < hdrlen)
 626                 return;
 627         wt->rx_data++;
 628
 629         switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
 630         case 0:
 631                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA="
 632                            MACSTR " BSSID=" MACSTR,
 633                            data_stype(WLAN_FC_GET_STYPE(fc)),
 634                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 635                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 636                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 637                            MAC2STR(hdr->addr3));
 638                 add_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2);
 639                 rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr2,
 640                             data + hdrlen, len - hdrlen);
 641                 break;
 642         case WLAN_FC_FROMDS:
 643                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR
 644                            " BSSID=" MACSTR " SA=" MACSTR,
 645                            data_stype(WLAN_FC_GET_STYPE(fc)),
 646                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 647                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 648                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 649                            MAC2STR(hdr->addr3));
 650                 add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
 651                 rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr3,
 652                             data + hdrlen, len - hdrlen);
 653                 break;
 654         case WLAN_FC_TODS:
 655                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR
 656                            " SA=" MACSTR " DA=" MACSTR,
 657                            data_stype(WLAN_FC_GET_STYPE(fc)),
 658                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 659                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 660                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 661                            MAC2STR(hdr->addr3));
 662                 add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2);
 663                 rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr3, hdr->addr2,
 664                             data + hdrlen, len - hdrlen);
 665                 break;
 666         case WLAN_FC_TODS | WLAN_FC_FROMDS:
 667                 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA="
 668                            MACSTR " DA=" MACSTR " SA=" MACSTR,
 669                            data_stype(WLAN_FC_GET_STYPE(fc)),
 670                            fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
 671                            fc & WLAN_FC_ISWEP ? " Prot" : "",
 672                            MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
 673                            MAC2STR(hdr->addr3),
 674                            MAC2STR((const u8 *) (hdr + 1)));
 675                 rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr2,
 676                             data + hdrlen, len - hdrlen);
 677                 break;
 678         }
 679 }