1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Original code based Host AP (software wireless LAN access point) driver 4 * for Intersil Prism2/2.5/3 - hostap.o module, common routines 5 * 6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 7 * <jkmaline@cc.hut.fi> 8 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> 9 * Copyright (c) 2004, Intel Corporation 10 * 11 * Few modifications for Realtek's Wi-Fi drivers by 12 * Andrea Merello <andrea.merello@gmail.com> 13 * 14 * A special thanks goes to Realtek for their support ! 15 */ 16 #include <linux/compiler.h> 17 #include <linux/errno.h> 18 #include <linux/if_arp.h> 19 #include <linux/in6.h> 20 #include <linux/in.h> 21 #include <linux/ip.h> 22 #include <linux/kernel.h> 23 #include <linux/module.h> 24 #include <linux/netdevice.h> 25 #include <linux/pci.h> 26 #include <linux/proc_fs.h> 27 #include <linux/skbuff.h> 28 #include <linux/slab.h> 29 #include <linux/tcp.h> 30 #include <linux/types.h> 31 #include <linux/wireless.h> 32 #include <linux/etherdevice.h> 33 #include <linux/uaccess.h> 34 #include <linux/ctype.h> 35 36 #include "rtllib.h" 37 #include "dot11d.h" 38 39 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb, 40 struct rtllib_rx_stats *stats); 41 42 static inline void rtllib_monitor_rx(struct rtllib_device *ieee, 43 struct sk_buff *skb, 44 struct rtllib_rx_stats *rx_status, 45 size_t hdr_length) 46 { 47 skb->dev = ieee->dev; 48 skb_reset_mac_header(skb); 49 skb_pull(skb, hdr_length); 50 skb->pkt_type = PACKET_OTHERHOST; 51 skb->protocol = htons(ETH_P_80211_RAW); 52 memset(skb->cb, 0, sizeof(skb->cb)); 53 netif_rx(skb); 54 } 55 56 /* Called only as a tasklet (software IRQ) */ 57 static struct rtllib_frag_entry * 58 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq, 59 unsigned int frag, u8 tid, u8 *src, u8 *dst) 60 { 61 struct rtllib_frag_entry *entry; 62 int i; 63 64 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) { 65 entry = &ieee->frag_cache[tid][i]; 66 if (entry->skb != NULL && 67 time_after(jiffies, entry->first_frag_time + 2 * HZ)) { 68 netdev_dbg(ieee->dev, 69 "expiring fragment cache entry seq=%u last_frag=%u\n", 70 entry->seq, entry->last_frag); 71 dev_kfree_skb_any(entry->skb); 72 entry->skb = NULL; 73 } 74 75 if (entry->skb != NULL && entry->seq == seq && 76 (entry->last_frag + 1 == frag || frag == -1) && 77 memcmp(entry->src_addr, src, ETH_ALEN) == 0 && 78 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) 79 return entry; 80 } 81 82 return NULL; 83 } 84 85 /* Called only as a tasklet (software IRQ) */ 86 static struct sk_buff * 87 rtllib_frag_cache_get(struct rtllib_device *ieee, 88 struct rtllib_hdr_4addr *hdr) 89 { 90 struct sk_buff *skb = NULL; 91 u16 fc = le16_to_cpu(hdr->frame_ctl); 92 u16 sc = le16_to_cpu(hdr->seq_ctl); 93 unsigned int frag = WLAN_GET_SEQ_FRAG(sc); 94 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 95 struct rtllib_frag_entry *entry; 96 struct rtllib_hdr_3addrqos *hdr_3addrqos; 97 struct rtllib_hdr_4addrqos *hdr_4addrqos; 98 u8 tid; 99 100 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && 101 RTLLIB_QOS_HAS_SEQ(fc)) { 102 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; 103 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; 104 tid = UP2AC(tid); 105 tid++; 106 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 107 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; 108 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; 109 tid = UP2AC(tid); 110 tid++; 111 } else { 112 tid = 0; 113 } 114 115 if (frag == 0) { 116 /* Reserve enough space to fit maximum frame length */ 117 skb = dev_alloc_skb(ieee->dev->mtu + 118 sizeof(struct rtllib_hdr_4addr) + 119 8 /* LLC */ + 120 2 /* alignment */ + 121 8 /* WEP */ + 122 ETH_ALEN /* WDS */ + 123 /* QOS Control */ 124 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0)); 125 if (!skb) 126 return NULL; 127 128 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; 129 ieee->frag_next_idx[tid]++; 130 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN) 131 ieee->frag_next_idx[tid] = 0; 132 133 if (entry->skb != NULL) 134 dev_kfree_skb_any(entry->skb); 135 136 entry->first_frag_time = jiffies; 137 entry->seq = seq; 138 entry->last_frag = frag; 139 entry->skb = skb; 140 ether_addr_copy(entry->src_addr, hdr->addr2); 141 ether_addr_copy(entry->dst_addr, hdr->addr1); 142 } else { 143 /* received a fragment of a frame for which the head fragment 144 * should have already been received 145 */ 146 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2, 147 hdr->addr1); 148 if (entry != NULL) { 149 entry->last_frag = frag; 150 skb = entry->skb; 151 } 152 } 153 154 return skb; 155 } 156 157 158 /* Called only as a tasklet (software IRQ) */ 159 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee, 160 struct rtllib_hdr_4addr *hdr) 161 { 162 u16 fc = le16_to_cpu(hdr->frame_ctl); 163 u16 sc = le16_to_cpu(hdr->seq_ctl); 164 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 165 struct rtllib_frag_entry *entry; 166 struct rtllib_hdr_3addrqos *hdr_3addrqos; 167 struct rtllib_hdr_4addrqos *hdr_4addrqos; 168 u8 tid; 169 170 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && 171 RTLLIB_QOS_HAS_SEQ(fc)) { 172 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; 173 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; 174 tid = UP2AC(tid); 175 tid++; 176 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 177 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; 178 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; 179 tid = UP2AC(tid); 180 tid++; 181 } else { 182 tid = 0; 183 } 184 185 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, 186 hdr->addr1); 187 188 if (entry == NULL) { 189 netdev_dbg(ieee->dev, 190 "Couldn't invalidate fragment cache entry (seq=%u)\n", 191 seq); 192 return -1; 193 } 194 195 entry->skb = NULL; 196 return 0; 197 } 198 199 /* rtllib_rx_frame_mgtmt 200 * 201 * Responsible for handling management control frames 202 * 203 * Called by rtllib_rx 204 */ 205 static inline int 206 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb, 207 struct rtllib_rx_stats *rx_stats, u16 type, 208 u16 stype) 209 { 210 /* On the struct stats definition there is written that 211 * this is not mandatory.... but seems that the probe 212 * response parser uses it 213 */ 214 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data; 215 216 rx_stats->len = skb->len; 217 rtllib_rx_mgt(ieee, skb, rx_stats); 218 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { 219 dev_kfree_skb_any(skb); 220 return 0; 221 } 222 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype); 223 224 dev_kfree_skb_any(skb); 225 226 return 0; 227 } 228 229 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation 230 * Ethernet-II snap header (RFC1042 for most EtherTypes) 231 */ 232 static unsigned char rfc1042_header[] = { 233 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 234 }; 235 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 236 static unsigned char bridge_tunnel_header[] = { 237 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 238 }; 239 /* No encapsulation header if EtherType < 0x600 (=length) */ 240 241 /* Called by rtllib_rx_frame_decrypt */ 242 static int rtllib_is_eapol_frame(struct rtllib_device *ieee, 243 struct sk_buff *skb, size_t hdrlen) 244 { 245 struct net_device *dev = ieee->dev; 246 u16 fc, ethertype; 247 struct rtllib_hdr_4addr *hdr; 248 u8 *pos; 249 250 if (skb->len < 24) 251 return 0; 252 253 hdr = (struct rtllib_hdr_4addr *) skb->data; 254 fc = le16_to_cpu(hdr->frame_ctl); 255 256 /* check that the frame is unicast frame to us */ 257 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == 258 RTLLIB_FCTL_TODS && 259 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && 260 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { 261 /* ToDS frame with own addr BSSID and DA */ 262 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == 263 RTLLIB_FCTL_FROMDS && 264 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { 265 /* FromDS frame with own addr as DA */ 266 } else 267 return 0; 268 269 if (skb->len < 24 + 8) 270 return 0; 271 272 /* check for port access entity Ethernet type */ 273 pos = skb->data + hdrlen; 274 ethertype = (pos[6] << 8) | pos[7]; 275 if (ethertype == ETH_P_PAE) 276 return 1; 277 278 return 0; 279 } 280 281 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 282 static inline int 283 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 284 struct lib80211_crypt_data *crypt) 285 { 286 struct rtllib_hdr_4addr *hdr; 287 int res, hdrlen; 288 289 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) 290 return 0; 291 292 if (ieee->hwsec_active) { 293 struct cb_desc *tcb_desc = (struct cb_desc *) 294 (skb->cb + MAX_DEV_ADDR_SIZE); 295 296 tcb_desc->bHwSec = 1; 297 298 if (ieee->need_sw_enc) 299 tcb_desc->bHwSec = 0; 300 } 301 302 hdr = (struct rtllib_hdr_4addr *) skb->data; 303 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 304 305 atomic_inc(&crypt->refcnt); 306 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); 307 atomic_dec(&crypt->refcnt); 308 if (res < 0) { 309 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n", 310 hdr->addr2, res); 311 if (res == -2) 312 netdev_dbg(ieee->dev, 313 "Decryption failed ICV mismatch (key %d)\n", 314 skb->data[hdrlen + 3] >> 6); 315 return -1; 316 } 317 318 return res; 319 } 320 321 322 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 323 static inline int 324 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb, 325 int keyidx, struct lib80211_crypt_data *crypt) 326 { 327 struct rtllib_hdr_4addr *hdr; 328 int res, hdrlen; 329 330 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) 331 return 0; 332 if (ieee->hwsec_active) { 333 struct cb_desc *tcb_desc = (struct cb_desc *) 334 (skb->cb + MAX_DEV_ADDR_SIZE); 335 336 tcb_desc->bHwSec = 1; 337 338 if (ieee->need_sw_enc) 339 tcb_desc->bHwSec = 0; 340 } 341 342 hdr = (struct rtllib_hdr_4addr *) skb->data; 343 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 344 345 atomic_inc(&crypt->refcnt); 346 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); 347 atomic_dec(&crypt->refcnt); 348 if (res < 0) { 349 netdev_dbg(ieee->dev, 350 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n", 351 hdr->addr2, keyidx); 352 return -1; 353 } 354 355 return 0; 356 } 357 358 359 /* this function is stolen from ipw2200 driver*/ 360 #define IEEE_PACKET_RETRY_TIME (5*HZ) 361 static int is_duplicate_packet(struct rtllib_device *ieee, 362 struct rtllib_hdr_4addr *header) 363 { 364 u16 fc = le16_to_cpu(header->frame_ctl); 365 u16 sc = le16_to_cpu(header->seq_ctl); 366 u16 seq = WLAN_GET_SEQ_SEQ(sc); 367 u16 frag = WLAN_GET_SEQ_FRAG(sc); 368 u16 *last_seq, *last_frag; 369 unsigned long *last_time; 370 struct rtllib_hdr_3addrqos *hdr_3addrqos; 371 struct rtllib_hdr_4addrqos *hdr_4addrqos; 372 u8 tid; 373 374 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && 375 RTLLIB_QOS_HAS_SEQ(fc)) { 376 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header; 377 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; 378 tid = UP2AC(tid); 379 tid++; 380 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 381 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header; 382 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; 383 tid = UP2AC(tid); 384 tid++; 385 } else { 386 tid = 0; 387 } 388 389 switch (ieee->iw_mode) { 390 case IW_MODE_ADHOC: 391 { 392 struct list_head *p; 393 struct ieee_ibss_seq *entry = NULL; 394 u8 *mac = header->addr2; 395 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; 396 397 list_for_each(p, &ieee->ibss_mac_hash[index]) { 398 entry = list_entry(p, struct ieee_ibss_seq, list); 399 if (!memcmp(entry->mac, mac, ETH_ALEN)) 400 break; 401 } 402 if (p == &ieee->ibss_mac_hash[index]) { 403 entry = kmalloc(sizeof(struct ieee_ibss_seq), 404 GFP_ATOMIC); 405 if (!entry) 406 return 0; 407 408 ether_addr_copy(entry->mac, mac); 409 entry->seq_num[tid] = seq; 410 entry->frag_num[tid] = frag; 411 entry->packet_time[tid] = jiffies; 412 list_add(&entry->list, &ieee->ibss_mac_hash[index]); 413 return 0; 414 } 415 last_seq = &entry->seq_num[tid]; 416 last_frag = &entry->frag_num[tid]; 417 last_time = &entry->packet_time[tid]; 418 break; 419 } 420 421 case IW_MODE_INFRA: 422 last_seq = &ieee->last_rxseq_num[tid]; 423 last_frag = &ieee->last_rxfrag_num[tid]; 424 last_time = &ieee->last_packet_time[tid]; 425 break; 426 default: 427 return 0; 428 } 429 430 if ((*last_seq == seq) && 431 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { 432 if (*last_frag == frag) 433 goto drop; 434 if (*last_frag + 1 != frag) 435 /* out-of-order fragment */ 436 goto drop; 437 } else 438 *last_seq = seq; 439 440 *last_frag = frag; 441 *last_time = jiffies; 442 return 0; 443 444 drop: 445 446 return 1; 447 } 448 449 static bool AddReorderEntry(struct rx_ts_record *pTS, 450 struct rx_reorder_entry *pReorderEntry) 451 { 452 struct list_head *pList = &pTS->RxPendingPktList; 453 454 while (pList->next != &pTS->RxPendingPktList) { 455 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *) 456 list_entry(pList->next, struct rx_reorder_entry, 457 List))->SeqNum)) 458 pList = pList->next; 459 else if (SN_EQUAL(pReorderEntry->SeqNum, 460 ((struct rx_reorder_entry *)list_entry(pList->next, 461 struct rx_reorder_entry, List))->SeqNum)) 462 return false; 463 else 464 break; 465 } 466 pReorderEntry->List.next = pList->next; 467 pReorderEntry->List.next->prev = &pReorderEntry->List; 468 pReorderEntry->List.prev = pList; 469 pList->next = &pReorderEntry->List; 470 471 return true; 472 } 473 474 void rtllib_indicate_packets(struct rtllib_device *ieee, 475 struct rtllib_rxb **prxbIndicateArray, u8 index) 476 { 477 struct net_device_stats *stats = &ieee->stats; 478 u8 i = 0, j = 0; 479 u16 ethertype; 480 481 for (j = 0; j < index; j++) { 482 struct rtllib_rxb *prxb = prxbIndicateArray[j]; 483 484 for (i = 0; i < prxb->nr_subframes; i++) { 485 struct sk_buff *sub_skb = prxb->subframes[i]; 486 487 /* convert hdr + possible LLC headers into Ethernet header */ 488 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 489 if (sub_skb->len >= 8 && 490 ((memcmp(sub_skb->data, rfc1042_header, 491 SNAP_SIZE) == 0 && 492 ethertype != ETH_P_AARP && 493 ethertype != ETH_P_IPX) || 494 memcmp(sub_skb->data, bridge_tunnel_header, 495 SNAP_SIZE) == 0)) { 496 /* remove RFC1042 or Bridge-Tunnel encapsulation 497 * and replace EtherType 498 */ 499 skb_pull(sub_skb, SNAP_SIZE); 500 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 501 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 502 } else { 503 u16 len; 504 /* Leave Ethernet header part of hdr and full payload */ 505 len = sub_skb->len; 506 memcpy(skb_push(sub_skb, 2), &len, 2); 507 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 508 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 509 } 510 511 /* Indicate the packets to upper layer */ 512 if (sub_skb) { 513 stats->rx_packets++; 514 stats->rx_bytes += sub_skb->len; 515 516 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 517 sub_skb->protocol = eth_type_trans(sub_skb, 518 ieee->dev); 519 sub_skb->dev = ieee->dev; 520 sub_skb->dev->stats.rx_packets++; 521 sub_skb->dev->stats.rx_bytes += sub_skb->len; 522 /* 802.11 crc not sufficient */ 523 sub_skb->ip_summed = CHECKSUM_NONE; 524 ieee->last_rx_ps_time = jiffies; 525 netif_rx(sub_skb); 526 } 527 } 528 kfree(prxb); 529 prxb = NULL; 530 } 531 } 532 533 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, 534 struct rx_ts_record *pTS) 535 { 536 struct rx_reorder_entry *pRxReorderEntry; 537 u8 RfdCnt = 0; 538 539 del_timer_sync(&pTS->RxPktPendingTimer); 540 while (!list_empty(&pTS->RxPendingPktList)) { 541 if (RfdCnt >= REORDER_WIN_SIZE) { 542 netdev_info(ieee->dev, 543 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", 544 __func__); 545 break; 546 } 547 548 pRxReorderEntry = (struct rx_reorder_entry *) 549 list_entry(pTS->RxPendingPktList.prev, 550 struct rx_reorder_entry, List); 551 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__, 552 pRxReorderEntry->SeqNum); 553 list_del_init(&pRxReorderEntry->List); 554 555 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb; 556 557 RfdCnt = RfdCnt + 1; 558 list_add_tail(&pRxReorderEntry->List, 559 &ieee->RxReorder_Unused_List); 560 } 561 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt); 562 563 pTS->RxIndicateSeq = 0xffff; 564 } 565 566 static void RxReorderIndicatePacket(struct rtllib_device *ieee, 567 struct rtllib_rxb *prxb, 568 struct rx_ts_record *pTS, u16 SeqNum) 569 { 570 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo; 571 struct rx_reorder_entry *pReorderEntry = NULL; 572 u8 WinSize = pHTInfo->RxReorderWinSize; 573 u16 WinEnd = 0; 574 u8 index = 0; 575 bool bMatchWinStart = false, bPktInBuf = false; 576 unsigned long flags; 577 578 netdev_dbg(ieee->dev, 579 "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n", 580 __func__, SeqNum, pTS->RxIndicateSeq, WinSize); 581 582 spin_lock_irqsave(&(ieee->reorder_spinlock), flags); 583 584 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096; 585 /* Rx Reorder initialize condition.*/ 586 if (pTS->RxIndicateSeq == 0xffff) 587 pTS->RxIndicateSeq = SeqNum; 588 589 /* Drop out the packet which SeqNum is smaller than WinStart */ 590 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) { 591 netdev_dbg(ieee->dev, 592 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n", 593 pTS->RxIndicateSeq, SeqNum); 594 pHTInfo->RxReorderDropCounter++; 595 { 596 int i; 597 598 for (i = 0; i < prxb->nr_subframes; i++) 599 dev_kfree_skb(prxb->subframes[i]); 600 kfree(prxb); 601 prxb = NULL; 602 } 603 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 604 return; 605 } 606 607 /* Sliding window manipulation. Conditions includes: 608 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 609 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N 610 */ 611 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) { 612 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096; 613 bMatchWinStart = true; 614 } else if (SN_LESS(WinEnd, SeqNum)) { 615 if (SeqNum >= (WinSize - 1)) 616 pTS->RxIndicateSeq = SeqNum + 1 - WinSize; 617 else 618 pTS->RxIndicateSeq = 4095 - 619 (WinSize - (SeqNum + 1)) + 1; 620 netdev_dbg(ieee->dev, 621 "Window Shift! IndicateSeq: %d, NewSeq: %d\n", 622 pTS->RxIndicateSeq, SeqNum); 623 } 624 625 /* Indication process. 626 * After Packet dropping and Sliding Window shifting as above, we can 627 * now just indicate the packets with the SeqNum smaller than latest 628 * WinStart and struct buffer other packets. 629 * 630 * For Rx Reorder condition: 631 * 1. All packets with SeqNum smaller than WinStart => Indicate 632 * 2. All packets with SeqNum larger than or equal to 633 * WinStart => Buffer it. 634 */ 635 if (bMatchWinStart) { 636 /* Current packet is going to be indicated.*/ 637 netdev_dbg(ieee->dev, 638 "Packets indication! IndicateSeq: %d, NewSeq: %d\n", 639 pTS->RxIndicateSeq, SeqNum); 640 ieee->prxbIndicateArray[0] = prxb; 641 index = 1; 642 } else { 643 /* Current packet is going to be inserted into pending list.*/ 644 if (!list_empty(&ieee->RxReorder_Unused_List)) { 645 pReorderEntry = (struct rx_reorder_entry *) 646 list_entry(ieee->RxReorder_Unused_List.next, 647 struct rx_reorder_entry, List); 648 list_del_init(&pReorderEntry->List); 649 650 /* Make a reorder entry and insert 651 * into a the packet list. 652 */ 653 pReorderEntry->SeqNum = SeqNum; 654 pReorderEntry->prxb = prxb; 655 656 if (!AddReorderEntry(pTS, pReorderEntry)) { 657 int i; 658 659 netdev_dbg(ieee->dev, 660 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n", 661 __func__, pTS->RxIndicateSeq, 662 SeqNum); 663 list_add_tail(&pReorderEntry->List, 664 &ieee->RxReorder_Unused_List); 665 666 for (i = 0; i < prxb->nr_subframes; i++) 667 dev_kfree_skb(prxb->subframes[i]); 668 kfree(prxb); 669 prxb = NULL; 670 } else { 671 netdev_dbg(ieee->dev, 672 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n", 673 pTS->RxIndicateSeq, SeqNum); 674 } 675 } else { 676 /* Packets are dropped if there are not enough reorder 677 * entries. This part should be modified!! We can just 678 * indicate all the packets in struct buffer and get 679 * reorder entries. 680 */ 681 netdev_err(ieee->dev, 682 "%s(): There is no reorder entry! Packet is dropped!\n", 683 __func__); 684 { 685 int i; 686 687 for (i = 0; i < prxb->nr_subframes; i++) 688 dev_kfree_skb(prxb->subframes[i]); 689 kfree(prxb); 690 prxb = NULL; 691 } 692 } 693 } 694 695 /* Check if there is any packet need indicate.*/ 696 while (!list_empty(&pTS->RxPendingPktList)) { 697 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n", 698 __func__); 699 700 pReorderEntry = (struct rx_reorder_entry *) 701 list_entry(pTS->RxPendingPktList.prev, 702 struct rx_reorder_entry, 703 List); 704 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) || 705 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) { 706 /* This protect struct buffer from overflow. */ 707 if (index >= REORDER_WIN_SIZE) { 708 netdev_err(ieee->dev, 709 "%s(): Buffer overflow!\n", 710 __func__); 711 bPktInBuf = true; 712 break; 713 } 714 715 list_del_init(&pReorderEntry->List); 716 717 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) 718 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 719 4096; 720 721 ieee->prxbIndicateArray[index] = pReorderEntry->prxb; 722 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", 723 __func__, pReorderEntry->SeqNum); 724 index++; 725 726 list_add_tail(&pReorderEntry->List, 727 &ieee->RxReorder_Unused_List); 728 } else { 729 bPktInBuf = true; 730 break; 731 } 732 } 733 734 /* Handling pending timer. Set this timer to prevent from long time 735 * Rx buffering. 736 */ 737 if (index > 0) { 738 if (timer_pending(&pTS->RxPktPendingTimer)) 739 del_timer_sync(&pTS->RxPktPendingTimer); 740 pTS->RxTimeoutIndicateSeq = 0xffff; 741 742 if (index > REORDER_WIN_SIZE) { 743 netdev_err(ieee->dev, 744 "%s(): Rx Reorder struct buffer full!\n", 745 __func__); 746 spin_unlock_irqrestore(&(ieee->reorder_spinlock), 747 flags); 748 return; 749 } 750 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index); 751 bPktInBuf = false; 752 } 753 754 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) { 755 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__); 756 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq; 757 mod_timer(&pTS->RxPktPendingTimer, jiffies + 758 msecs_to_jiffies(pHTInfo->RxReorderPendingTime)); 759 } 760 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 761 } 762 763 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb, 764 struct rtllib_rx_stats *rx_stats, 765 struct rtllib_rxb *rxb, u8 *src, u8 *dst) 766 { 767 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data; 768 u16 fc = le16_to_cpu(hdr->frame_ctl); 769 770 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr); 771 u16 ChkLength; 772 bool bIsAggregateFrame = false; 773 u16 nSubframe_Length; 774 u8 nPadding_Length = 0; 775 u16 SeqNum = 0; 776 struct sk_buff *sub_skb; 777 /* just for debug purpose */ 778 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl)); 779 if ((RTLLIB_QOS_HAS_SEQ(fc)) && 780 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) 781 bIsAggregateFrame = true; 782 783 if (RTLLIB_QOS_HAS_SEQ(fc)) 784 LLCOffset += 2; 785 if (rx_stats->bContainHTC) 786 LLCOffset += sHTCLng; 787 788 ChkLength = LLCOffset; 789 790 if (skb->len <= ChkLength) 791 return 0; 792 793 skb_pull(skb, LLCOffset); 794 ieee->bIsAggregateFrame = bIsAggregateFrame; 795 if (!bIsAggregateFrame) { 796 rxb->nr_subframes = 1; 797 798 /* altered by clark 3/30/2010 799 * The struct buffer size of the skb indicated to upper layer 800 * must be less than 5000, or the defraged IP datagram 801 * in the IP layer will exceed "ipfrag_high_tresh" and be 802 * discarded. so there must not use the function 803 * "skb_copy" and "skb_clone" for "skb". 804 */ 805 806 /* Allocate new skb for releasing to upper layer */ 807 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE); 808 if (!sub_skb) 809 return 0; 810 skb_reserve(sub_skb, 12); 811 skb_put_data(sub_skb, skb->data, skb->len); 812 sub_skb->dev = ieee->dev; 813 814 rxb->subframes[0] = sub_skb; 815 816 memcpy(rxb->src, src, ETH_ALEN); 817 memcpy(rxb->dst, dst, ETH_ALEN); 818 rxb->subframes[0]->dev = ieee->dev; 819 return 1; 820 } 821 822 rxb->nr_subframes = 0; 823 memcpy(rxb->src, src, ETH_ALEN); 824 memcpy(rxb->dst, dst, ETH_ALEN); 825 while (skb->len > ETHERNET_HEADER_SIZE) { 826 /* Offset 12 denote 2 mac address */ 827 nSubframe_Length = *((u16 *)(skb->data + 12)); 828 nSubframe_Length = (nSubframe_Length >> 8) + 829 (nSubframe_Length << 8); 830 831 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { 832 netdev_info(ieee->dev, 833 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", 834 __func__, rxb->nr_subframes); 835 netdev_info(ieee->dev, 836 "%s: A-MSDU parse error!! Subframe Length: %d\n", 837 __func__, nSubframe_Length); 838 netdev_info(ieee->dev, 839 "nRemain_Length is %d and nSubframe_Length is : %d\n", 840 skb->len, nSubframe_Length); 841 netdev_info(ieee->dev, 842 "The Packet SeqNum is %d\n", 843 SeqNum); 844 return 0; 845 } 846 847 /* move the data point to data content */ 848 skb_pull(skb, ETHERNET_HEADER_SIZE); 849 850 /* altered by clark 3/30/2010 851 * The struct buffer size of the skb indicated to upper layer 852 * must be less than 5000, or the defraged IP datagram 853 * in the IP layer will exceed "ipfrag_high_tresh" and be 854 * discarded. so there must not use the function 855 * "skb_copy" and "skb_clone" for "skb". 856 */ 857 858 /* Allocate new skb for releasing to upper layer */ 859 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 860 if (!sub_skb) 861 return 0; 862 skb_reserve(sub_skb, 12); 863 skb_put_data(sub_skb, skb->data, nSubframe_Length); 864 865 sub_skb->dev = ieee->dev; 866 rxb->subframes[rxb->nr_subframes++] = sub_skb; 867 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 868 netdev_dbg(ieee->dev, 869 "ParseSubframe(): Too many Subframes! Packets dropped!\n"); 870 break; 871 } 872 skb_pull(skb, nSubframe_Length); 873 874 if (skb->len != 0) { 875 nPadding_Length = 4 - ((nSubframe_Length + 876 ETHERNET_HEADER_SIZE) % 4); 877 if (nPadding_Length == 4) 878 nPadding_Length = 0; 879 880 if (skb->len < nPadding_Length) 881 return 0; 882 883 skb_pull(skb, nPadding_Length); 884 } 885 } 886 887 return rxb->nr_subframes; 888 } 889 890 891 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, 892 struct sk_buff *skb, 893 struct rtllib_rx_stats *rx_stats) 894 { 895 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; 896 u16 fc = le16_to_cpu(hdr->frame_ctl); 897 size_t hdrlen; 898 899 hdrlen = rtllib_get_hdrlen(fc); 900 if (HTCCheck(ieee, skb->data)) { 901 if (net_ratelimit()) 902 netdev_info(ieee->dev, "%s: find HTCControl!\n", 903 __func__); 904 hdrlen += 4; 905 rx_stats->bContainHTC = true; 906 } 907 908 if (RTLLIB_QOS_HAS_SEQ(fc)) 909 rx_stats->bIsQosData = true; 910 911 return hdrlen; 912 } 913 914 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee, 915 struct sk_buff *skb, u8 multicast) 916 { 917 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; 918 u16 fc, sc; 919 u8 frag, type, stype; 920 921 fc = le16_to_cpu(hdr->frame_ctl); 922 type = WLAN_FC_GET_TYPE(fc); 923 stype = WLAN_FC_GET_STYPE(fc); 924 sc = le16_to_cpu(hdr->seq_ctl); 925 frag = WLAN_GET_SEQ_FRAG(sc); 926 927 if ((ieee->pHTInfo->bCurRxReorderEnable == false) || 928 !ieee->current_network.qos_data.active || 929 !IsDataFrame(skb->data) || 930 IsLegacyDataFrame(skb->data)) { 931 if (!((type == RTLLIB_FTYPE_MGMT) && 932 (stype == RTLLIB_STYPE_BEACON))) { 933 if (is_duplicate_packet(ieee, hdr)) 934 return -1; 935 } 936 } else { 937 struct rx_ts_record *pRxTS = NULL; 938 939 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2, 940 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) { 941 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) && 942 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) 943 return -1; 944 pRxTS->RxLastFragNum = frag; 945 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc); 946 } else { 947 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n", 948 __func__); 949 return -1; 950 } 951 } 952 953 return 0; 954 } 955 956 static void rtllib_rx_extract_addr(struct rtllib_device *ieee, 957 struct rtllib_hdr_4addr *hdr, u8 *dst, 958 u8 *src, u8 *bssid) 959 { 960 u16 fc = le16_to_cpu(hdr->frame_ctl); 961 962 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) { 963 case RTLLIB_FCTL_FROMDS: 964 ether_addr_copy(dst, hdr->addr1); 965 ether_addr_copy(src, hdr->addr3); 966 ether_addr_copy(bssid, hdr->addr2); 967 break; 968 case RTLLIB_FCTL_TODS: 969 ether_addr_copy(dst, hdr->addr3); 970 ether_addr_copy(src, hdr->addr2); 971 ether_addr_copy(bssid, hdr->addr1); 972 break; 973 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS: 974 ether_addr_copy(dst, hdr->addr3); 975 ether_addr_copy(src, hdr->addr4); 976 ether_addr_copy(bssid, ieee->current_network.bssid); 977 break; 978 default: 979 ether_addr_copy(dst, hdr->addr1); 980 ether_addr_copy(src, hdr->addr2); 981 ether_addr_copy(bssid, hdr->addr3); 982 break; 983 } 984 } 985 986 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, 987 u8 *dst, u8 *src, u8 *bssid, u8 *addr2) 988 { 989 u8 type, stype; 990 991 type = WLAN_FC_GET_TYPE(fc); 992 stype = WLAN_FC_GET_STYPE(fc); 993 994 /* Filter frames from different BSS */ 995 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) && 996 !ether_addr_equal(ieee->current_network.bssid, bssid) && 997 !is_zero_ether_addr(ieee->current_network.bssid)) { 998 return -1; 999 } 1000 1001 /* Filter packets sent by an STA that will be forwarded by AP */ 1002 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn && 1003 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) { 1004 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) && 1005 !ether_addr_equal(dst, ieee->current_network.bssid) && 1006 ether_addr_equal(bssid, ieee->current_network.bssid)) { 1007 return -1; 1008 } 1009 } 1010 1011 /* Nullfunc frames may have PS-bit set, so they must be passed to 1012 * hostap_handle_sta_rx() before being dropped here. 1013 */ 1014 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) { 1015 if (stype != RTLLIB_STYPE_DATA && 1016 stype != RTLLIB_STYPE_DATA_CFACK && 1017 stype != RTLLIB_STYPE_DATA_CFPOLL && 1018 stype != RTLLIB_STYPE_DATA_CFACKPOLL && 1019 stype != RTLLIB_STYPE_QOS_DATA) { 1020 if (stype != RTLLIB_STYPE_NULLFUNC) 1021 netdev_dbg(ieee->dev, 1022 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n", 1023 type, stype); 1024 return -1; 1025 } 1026 } 1027 1028 if (ieee->iw_mode != IW_MODE_MESH) { 1029 /* packets from our adapter are dropped (echo) */ 1030 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN)) 1031 return -1; 1032 1033 /* {broad,multi}cast packets to our BSS go through */ 1034 if (is_multicast_ether_addr(dst)) { 1035 if (memcmp(bssid, ieee->current_network.bssid, 1036 ETH_ALEN)) 1037 return -1; 1038 } 1039 } 1040 return 0; 1041 } 1042 1043 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb, 1044 struct lib80211_crypt_data **crypt, size_t hdrlen) 1045 { 1046 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; 1047 u16 fc = le16_to_cpu(hdr->frame_ctl); 1048 int idx = 0; 1049 1050 if (ieee->host_decrypt) { 1051 if (skb->len >= hdrlen + 3) 1052 idx = skb->data[hdrlen + 3] >> 6; 1053 1054 *crypt = ieee->crypt_info.crypt[idx]; 1055 /* allow NULL decrypt to indicate an station specific override 1056 * for default encryption 1057 */ 1058 if (*crypt && ((*crypt)->ops == NULL || 1059 (*crypt)->ops->decrypt_mpdu == NULL)) 1060 *crypt = NULL; 1061 1062 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) { 1063 /* This seems to be triggered by some (multicast?) 1064 * frames from other than current BSS, so just drop the 1065 * frames silently instead of filling system log with 1066 * these reports. 1067 */ 1068 netdev_dbg(ieee->dev, 1069 "Decryption failed (not set) (SA= %pM)\n", 1070 hdr->addr2); 1071 return -1; 1072 } 1073 } 1074 1075 return 0; 1076 } 1077 1078 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 1079 struct rtllib_rx_stats *rx_stats, 1080 struct lib80211_crypt_data *crypt, size_t hdrlen) 1081 { 1082 struct rtllib_hdr_4addr *hdr; 1083 int keyidx = 0; 1084 u16 fc, sc; 1085 u8 frag; 1086 1087 hdr = (struct rtllib_hdr_4addr *)skb->data; 1088 fc = le16_to_cpu(hdr->frame_ctl); 1089 sc = le16_to_cpu(hdr->seq_ctl); 1090 frag = WLAN_GET_SEQ_FRAG(sc); 1091 1092 if ((!rx_stats->Decrypted)) 1093 ieee->need_sw_enc = 1; 1094 else 1095 ieee->need_sw_enc = 0; 1096 1097 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt); 1098 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) { 1099 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__); 1100 return -1; 1101 } 1102 1103 hdr = (struct rtllib_hdr_4addr *) skb->data; 1104 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) { 1105 int flen; 1106 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); 1107 1108 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag); 1109 1110 if (!frag_skb) { 1111 netdev_dbg(ieee->dev, 1112 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n", 1113 (fc & RTLLIB_FCTL_MOREFRAGS) != 0, 1114 WLAN_GET_SEQ_SEQ(sc), frag); 1115 return -1; 1116 } 1117 flen = skb->len; 1118 if (frag != 0) 1119 flen -= hdrlen; 1120 1121 if (frag_skb->tail + flen > frag_skb->end) { 1122 netdev_warn(ieee->dev, 1123 "%s: host decrypted and reassembled frame did not fit skb\n", 1124 __func__); 1125 rtllib_frag_cache_invalidate(ieee, hdr); 1126 return -1; 1127 } 1128 1129 if (frag == 0) { 1130 /* copy first fragment (including full headers) into 1131 * beginning of the fragment cache skb 1132 */ 1133 skb_put_data(frag_skb, skb->data, flen); 1134 } else { 1135 /* append frame payload to the end of the fragment 1136 * cache skb 1137 */ 1138 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1139 } 1140 dev_kfree_skb_any(skb); 1141 skb = NULL; 1142 1143 if (fc & RTLLIB_FCTL_MOREFRAGS) { 1144 /* more fragments expected - leave the skb in fragment 1145 * cache for now; it will be delivered to upper layers 1146 * after all fragments have been received 1147 */ 1148 return -2; 1149 } 1150 1151 /* this was the last fragment and the frame will be 1152 * delivered, so remove skb from fragment cache 1153 */ 1154 skb = frag_skb; 1155 hdr = (struct rtllib_hdr_4addr *) skb->data; 1156 rtllib_frag_cache_invalidate(ieee, hdr); 1157 } 1158 1159 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1160 * encrypted/authenticated 1161 */ 1162 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && 1163 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1164 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__); 1165 return -1; 1166 } 1167 1168 hdr = (struct rtllib_hdr_4addr *) skb->data; 1169 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) { 1170 if (/*ieee->ieee802_1x &&*/ 1171 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1172 1173 /* pass unencrypted EAPOL frames even if encryption is 1174 * configured 1175 */ 1176 struct eapol *eap = (struct eapol *)(skb->data + 1177 24); 1178 netdev_dbg(ieee->dev, 1179 "RX: IEEE 802.1X EAPOL frame: %s\n", 1180 eap_get_type(eap->type)); 1181 } else { 1182 netdev_dbg(ieee->dev, 1183 "encryption configured, but RX frame not encrypted (SA= %pM)\n", 1184 hdr->addr2); 1185 return -1; 1186 } 1187 } 1188 1189 if (crypt && !(fc & RTLLIB_FCTL_WEP) && 1190 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1191 struct eapol *eap = (struct eapol *)(skb->data + 24); 1192 1193 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n", 1194 eap_get_type(eap->type)); 1195 } 1196 1197 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep && 1198 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1199 netdev_dbg(ieee->dev, 1200 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n", 1201 hdr->addr2); 1202 return -1; 1203 } 1204 1205 return 0; 1206 } 1207 1208 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, 1209 u8 nr_subframes) 1210 { 1211 if (unicast) { 1212 1213 if (ieee->state == RTLLIB_LINKED) { 1214 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod + 1215 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) || 1216 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) { 1217 if (ieee->LeisurePSLeave) 1218 ieee->LeisurePSLeave(ieee->dev); 1219 } 1220 } 1221 } 1222 ieee->last_rx_ps_time = jiffies; 1223 } 1224 1225 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee, 1226 struct rtllib_rx_stats *rx_stats, 1227 struct rtllib_rxb *rxb, 1228 u8 *dst, 1229 u8 *src) 1230 { 1231 struct net_device *dev = ieee->dev; 1232 u16 ethertype; 1233 int i = 0; 1234 1235 if (rxb == NULL) { 1236 netdev_info(dev, "%s: rxb is NULL!!\n", __func__); 1237 return; 1238 } 1239 1240 for (i = 0; i < rxb->nr_subframes; i++) { 1241 struct sk_buff *sub_skb = rxb->subframes[i]; 1242 1243 if (sub_skb) { 1244 /* convert hdr + possible LLC headers 1245 * into Ethernet header 1246 */ 1247 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 1248 if (sub_skb->len >= 8 && 1249 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && 1250 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 1251 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { 1252 /* remove RFC1042 or Bridge-Tunnel encapsulation 1253 * and replace EtherType 1254 */ 1255 skb_pull(sub_skb, SNAP_SIZE); 1256 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1257 src); 1258 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1259 dst); 1260 } else { 1261 u16 len; 1262 /* Leave Ethernet header part of hdr 1263 * and full payload 1264 */ 1265 len = sub_skb->len; 1266 memcpy(skb_push(sub_skb, 2), &len, 2); 1267 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1268 src); 1269 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1270 dst); 1271 } 1272 1273 ieee->stats.rx_packets++; 1274 ieee->stats.rx_bytes += sub_skb->len; 1275 1276 if (is_multicast_ether_addr(dst)) 1277 ieee->stats.multicast++; 1278 1279 /* Indicate the packets to upper layer */ 1280 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 1281 sub_skb->protocol = eth_type_trans(sub_skb, dev); 1282 sub_skb->dev = dev; 1283 sub_skb->dev->stats.rx_packets++; 1284 sub_skb->dev->stats.rx_bytes += sub_skb->len; 1285 /* 802.11 crc not sufficient */ 1286 sub_skb->ip_summed = CHECKSUM_NONE; 1287 netif_rx(sub_skb); 1288 } 1289 } 1290 kfree(rxb); 1291 } 1292 1293 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, 1294 struct rtllib_rx_stats *rx_stats) 1295 { 1296 struct net_device *dev = ieee->dev; 1297 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; 1298 struct lib80211_crypt_data *crypt = NULL; 1299 struct rtllib_rxb *rxb = NULL; 1300 struct rx_ts_record *pTS = NULL; 1301 u16 fc, sc, SeqNum = 0; 1302 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0; 1303 u8 dst[ETH_ALEN]; 1304 u8 src[ETH_ALEN]; 1305 u8 bssid[ETH_ALEN] = {0}; 1306 1307 size_t hdrlen = 0; 1308 bool bToOtherSTA = false; 1309 int ret = 0, i = 0; 1310 1311 fc = le16_to_cpu(hdr->frame_ctl); 1312 type = WLAN_FC_GET_TYPE(fc); 1313 stype = WLAN_FC_GET_STYPE(fc); 1314 sc = le16_to_cpu(hdr->seq_ctl); 1315 1316 /*Filter pkt not to me*/ 1317 multicast = is_multicast_ether_addr(hdr->addr1); 1318 unicast = !multicast; 1319 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) { 1320 if (ieee->bNetPromiscuousMode) 1321 bToOtherSTA = true; 1322 else 1323 goto rx_dropped; 1324 } 1325 1326 /*Filter pkt has too small length */ 1327 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats); 1328 if (skb->len < hdrlen) { 1329 netdev_info(dev, 1330 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1331 __func__); 1332 goto rx_dropped; 1333 } 1334 1335 /* Filter Duplicate pkt */ 1336 ret = rtllib_rx_check_duplicate(ieee, skb, multicast); 1337 if (ret < 0) 1338 goto rx_dropped; 1339 1340 /* Filter CTRL Frame */ 1341 if (type == RTLLIB_FTYPE_CTL) 1342 goto rx_dropped; 1343 1344 /* Filter MGNT Frame */ 1345 if (type == RTLLIB_FTYPE_MGMT) { 1346 if (bToOtherSTA) 1347 goto rx_dropped; 1348 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1349 goto rx_dropped; 1350 else 1351 goto rx_exit; 1352 } 1353 1354 /* Filter WAPI DATA Frame */ 1355 1356 /* Update statstics for AP roaming */ 1357 if (!bToOtherSTA) { 1358 ieee->LinkDetectInfo.NumRecvDataInPeriod++; 1359 ieee->LinkDetectInfo.NumRxOkInPeriod++; 1360 } 1361 1362 /* Data frame - extract src/dst addresses */ 1363 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); 1364 1365 /* Filter Data frames */ 1366 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2); 1367 if (ret < 0) 1368 goto rx_dropped; 1369 1370 if (skb->len == hdrlen) 1371 goto rx_dropped; 1372 1373 /* Send pspoll based on moredata */ 1374 if ((ieee->iw_mode == IW_MODE_INFRA) && 1375 (ieee->sta_sleep == LPS_IS_SLEEP) && 1376 (ieee->polling) && (!bToOtherSTA)) { 1377 if (WLAN_FC_MORE_DATA(fc)) { 1378 /* more data bit is set, let's request a new frame 1379 * from the AP 1380 */ 1381 rtllib_sta_ps_send_pspoll_frame(ieee); 1382 } else { 1383 ieee->polling = false; 1384 } 1385 } 1386 1387 /* Get crypt if encrypted */ 1388 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen); 1389 if (ret == -1) 1390 goto rx_dropped; 1391 1392 /* Decrypt data frame (including reassemble) */ 1393 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen); 1394 if (ret == -1) 1395 goto rx_dropped; 1396 else if (ret == -2) 1397 goto rx_exit; 1398 1399 /* Get TS for Rx Reorder */ 1400 hdr = (struct rtllib_hdr_4addr *) skb->data; 1401 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1402 && !is_multicast_ether_addr(hdr->addr1) 1403 && (!bToOtherSTA)) { 1404 TID = Frame_QoSTID(skb->data); 1405 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1406 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, 1407 RX_DIR, true); 1408 if (TID != 0 && TID != 3) 1409 ieee->bis_any_nonbepkts = true; 1410 } 1411 1412 /* Parse rx data frame (For AMSDU) */ 1413 /* skb: hdr + (possible reassembled) full plaintext payload */ 1414 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC); 1415 if (!rxb) 1416 goto rx_dropped; 1417 1418 /* to parse amsdu packets */ 1419 /* qos data packets & reserved bit is 1 */ 1420 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { 1421 /* only to free rxb, and not submit the packets 1422 * to upper layer 1423 */ 1424 for (i = 0; i < rxb->nr_subframes; i++) 1425 dev_kfree_skb(rxb->subframes[i]); 1426 kfree(rxb); 1427 rxb = NULL; 1428 goto rx_dropped; 1429 } 1430 1431 /* Update WAPI PN */ 1432 1433 /* Check if leave LPS */ 1434 if (!bToOtherSTA) { 1435 if (ieee->bIsAggregateFrame) 1436 nr_subframes = rxb->nr_subframes; 1437 else 1438 nr_subframes = 1; 1439 if (unicast) 1440 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes; 1441 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes); 1442 } 1443 1444 /* Indicate packets to upper layer or Rx Reorder */ 1445 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || 1446 bToOtherSTA) 1447 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src); 1448 else 1449 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); 1450 1451 dev_kfree_skb(skb); 1452 1453 rx_exit: 1454 return 1; 1455 1456 rx_dropped: 1457 ieee->stats.rx_dropped++; 1458 1459 /* Returning 0 indicates to caller that we have not handled the SKB-- 1460 * so it is still allocated and can be used again by underlying 1461 * hardware as a DMA target 1462 */ 1463 return 0; 1464 } 1465 1466 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb, 1467 struct rtllib_rx_stats *rx_stats) 1468 { 1469 return 0; 1470 } 1471 1472 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb, 1473 struct rtllib_rx_stats *rx_stats) 1474 { 1475 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; 1476 u16 fc = le16_to_cpu(hdr->frame_ctl); 1477 size_t hdrlen = rtllib_get_hdrlen(fc); 1478 1479 if (skb->len < hdrlen) { 1480 netdev_info(ieee->dev, 1481 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1482 __func__); 1483 return 0; 1484 } 1485 1486 if (HTCCheck(ieee, skb->data)) { 1487 if (net_ratelimit()) 1488 netdev_info(ieee->dev, "%s: Find HTCControl!\n", 1489 __func__); 1490 hdrlen += 4; 1491 } 1492 1493 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen); 1494 ieee->stats.rx_packets++; 1495 ieee->stats.rx_bytes += skb->len; 1496 1497 return 1; 1498 } 1499 1500 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb, 1501 struct rtllib_rx_stats *rx_stats) 1502 { 1503 return 0; 1504 } 1505 1506 /* All received frames are sent to this function. @skb contains the frame in 1507 * IEEE 802.11 format, i.e., in the format it was sent over air. 1508 * This function is called only as a tasklet (software IRQ). 1509 */ 1510 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, 1511 struct rtllib_rx_stats *rx_stats) 1512 { 1513 int ret = 0; 1514 1515 if (!ieee || !skb || !rx_stats) { 1516 pr_info("%s: Input parameters NULL!\n", __func__); 1517 goto rx_dropped; 1518 } 1519 if (skb->len < 10) { 1520 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__); 1521 goto rx_dropped; 1522 } 1523 1524 switch (ieee->iw_mode) { 1525 case IW_MODE_ADHOC: 1526 case IW_MODE_INFRA: 1527 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats); 1528 break; 1529 case IW_MODE_MASTER: 1530 case IW_MODE_REPEAT: 1531 ret = rtllib_rx_Master(ieee, skb, rx_stats); 1532 break; 1533 case IW_MODE_MONITOR: 1534 ret = rtllib_rx_Monitor(ieee, skb, rx_stats); 1535 break; 1536 case IW_MODE_MESH: 1537 ret = rtllib_rx_Mesh(ieee, skb, rx_stats); 1538 break; 1539 default: 1540 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__); 1541 break; 1542 } 1543 1544 return ret; 1545 1546 rx_dropped: 1547 if (ieee) 1548 ieee->stats.rx_dropped++; 1549 return 0; 1550 } 1551 EXPORT_SYMBOL(rtllib_rx); 1552 1553 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1554 1555 /* Make ther structure we read from the beacon packet has the right values */ 1556 static int rtllib_verify_qos_info(struct rtllib_qos_information_element 1557 *info_element, int sub_type) 1558 { 1559 1560 if (info_element->qui_subtype != sub_type) 1561 return -1; 1562 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1563 return -1; 1564 if (info_element->qui_type != QOS_OUI_TYPE) 1565 return -1; 1566 if (info_element->version != QOS_VERSION_1) 1567 return -1; 1568 1569 return 0; 1570 } 1571 1572 1573 /* Parse a QoS parameter element */ 1574 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info 1575 *element_param, 1576 struct rtllib_info_element 1577 *info_element) 1578 { 1579 int ret = 0; 1580 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2; 1581 1582 if ((info_element == NULL) || (element_param == NULL)) 1583 return -1; 1584 1585 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { 1586 memcpy(element_param->info_element.qui, info_element->data, 1587 info_element->len); 1588 element_param->info_element.elementID = info_element->id; 1589 element_param->info_element.length = info_element->len; 1590 } else 1591 ret = -1; 1592 if (ret == 0) 1593 ret = rtllib_verify_qos_info(&element_param->info_element, 1594 QOS_OUI_PARAM_SUB_TYPE); 1595 return ret; 1596 } 1597 1598 /* Parse a QoS information element */ 1599 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element 1600 *element_info, 1601 struct rtllib_info_element 1602 *info_element) 1603 { 1604 int ret = 0; 1605 u16 size = sizeof(struct rtllib_qos_information_element) - 2; 1606 1607 if (element_info == NULL) 1608 return -1; 1609 if (info_element == NULL) 1610 return -1; 1611 1612 if ((info_element->id == QOS_ELEMENT_ID) && 1613 (info_element->len == size)) { 1614 memcpy(element_info->qui, info_element->data, 1615 info_element->len); 1616 element_info->elementID = info_element->id; 1617 element_info->length = info_element->len; 1618 } else 1619 ret = -1; 1620 1621 if (ret == 0) 1622 ret = rtllib_verify_qos_info(element_info, 1623 QOS_OUI_INFO_SUB_TYPE); 1624 return ret; 1625 } 1626 1627 1628 /* Write QoS parameters from the ac parameters. */ 1629 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm, 1630 struct rtllib_qos_data *qos_data) 1631 { 1632 struct rtllib_qos_ac_parameter *ac_params; 1633 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters); 1634 int i; 1635 u8 aci; 1636 u8 acm; 1637 1638 qos_data->wmm_acm = 0; 1639 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1640 ac_params = &(param_elm->ac_params_record[i]); 1641 1642 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1643 acm = (ac_params->aci_aifsn & 0x10) >> 4; 1644 1645 if (aci >= QOS_QUEUE_NUM) 1646 continue; 1647 switch (aci) { 1648 case 1: 1649 /* BIT(0) | BIT(3) */ 1650 if (acm) 1651 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3); 1652 break; 1653 case 2: 1654 /* BIT(4) | BIT(5) */ 1655 if (acm) 1656 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5); 1657 break; 1658 case 3: 1659 /* BIT(6) | BIT(7) */ 1660 if (acm) 1661 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7); 1662 break; 1663 case 0: 1664 default: 1665 /* BIT(1) | BIT(2) */ 1666 if (acm) 1667 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2); 1668 break; 1669 } 1670 1671 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1672 1673 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1674 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2); 1675 1676 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 1677 0x0F); 1678 1679 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 1680 0xF0) >> 4); 1681 1682 qos_param->flag[aci] = 1683 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1684 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1685 } 1686 return 0; 1687 } 1688 1689 /* we have a generic data element which it may contain QoS information or 1690 * parameters element. check the information element length to decide 1691 * which type to read 1692 */ 1693 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee, 1694 struct rtllib_info_element 1695 *info_element, 1696 struct rtllib_network *network) 1697 { 1698 int rc = 0; 1699 struct rtllib_qos_information_element qos_info_element; 1700 1701 rc = rtllib_read_qos_info_element(&qos_info_element, info_element); 1702 1703 if (rc == 0) { 1704 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1705 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1706 } else { 1707 struct rtllib_qos_parameter_info param_element; 1708 1709 rc = rtllib_read_qos_param_element(¶m_element, 1710 info_element); 1711 if (rc == 0) { 1712 rtllib_qos_convert_ac_to_parameters(¶m_element, 1713 &(network->qos_data)); 1714 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1715 network->qos_data.param_count = 1716 param_element.info_element.ac_info & 0x0F; 1717 } 1718 } 1719 1720 if (rc == 0) { 1721 netdev_dbg(ieee->dev, "QoS is supported\n"); 1722 network->qos_data.supported = 1; 1723 } 1724 return rc; 1725 } 1726 1727 static const char *get_info_element_string(u16 id) 1728 { 1729 switch (id) { 1730 case MFIE_TYPE_SSID: 1731 return "SSID"; 1732 case MFIE_TYPE_RATES: 1733 return "RATES"; 1734 case MFIE_TYPE_FH_SET: 1735 return "FH_SET"; 1736 case MFIE_TYPE_DS_SET: 1737 return "DS_SET"; 1738 case MFIE_TYPE_CF_SET: 1739 return "CF_SET"; 1740 case MFIE_TYPE_TIM: 1741 return "TIM"; 1742 case MFIE_TYPE_IBSS_SET: 1743 return "IBSS_SET"; 1744 case MFIE_TYPE_COUNTRY: 1745 return "COUNTRY"; 1746 case MFIE_TYPE_HOP_PARAMS: 1747 return "HOP_PARAMS"; 1748 case MFIE_TYPE_HOP_TABLE: 1749 return "HOP_TABLE"; 1750 case MFIE_TYPE_REQUEST: 1751 return "REQUEST"; 1752 case MFIE_TYPE_CHALLENGE: 1753 return "CHALLENGE"; 1754 case MFIE_TYPE_POWER_CONSTRAINT: 1755 return "POWER_CONSTRAINT"; 1756 case MFIE_TYPE_POWER_CAPABILITY: 1757 return "POWER_CAPABILITY"; 1758 case MFIE_TYPE_TPC_REQUEST: 1759 return "TPC_REQUEST"; 1760 case MFIE_TYPE_TPC_REPORT: 1761 return "TPC_REPORT"; 1762 case MFIE_TYPE_SUPP_CHANNELS: 1763 return "SUPP_CHANNELS"; 1764 case MFIE_TYPE_CSA: 1765 return "CSA"; 1766 case MFIE_TYPE_MEASURE_REQUEST: 1767 return "MEASURE_REQUEST"; 1768 case MFIE_TYPE_MEASURE_REPORT: 1769 return "MEASURE_REPORT"; 1770 case MFIE_TYPE_QUIET: 1771 return "QUIET"; 1772 case MFIE_TYPE_IBSS_DFS: 1773 return "IBSS_DFS"; 1774 case MFIE_TYPE_RSN: 1775 return "RSN"; 1776 case MFIE_TYPE_RATES_EX: 1777 return "RATES_EX"; 1778 case MFIE_TYPE_GENERIC: 1779 return "GENERIC"; 1780 case MFIE_TYPE_QOS_PARAMETER: 1781 return "QOS_PARAMETER"; 1782 default: 1783 return "UNKNOWN"; 1784 } 1785 } 1786 1787 static inline void rtllib_extract_country_ie( 1788 struct rtllib_device *ieee, 1789 struct rtllib_info_element *info_element, 1790 struct rtllib_network *network, 1791 u8 *addr2) 1792 { 1793 if (IS_DOT11D_ENABLE(ieee)) { 1794 if (info_element->len != 0) { 1795 memcpy(network->CountryIeBuf, info_element->data, 1796 info_element->len); 1797 network->CountryIeLen = info_element->len; 1798 1799 if (!IS_COUNTRY_IE_VALID(ieee)) { 1800 if (rtllib_act_scanning(ieee, false) && 1801 ieee->FirstIe_InScan) 1802 netdev_info(ieee->dev, 1803 "Received beacon ContryIE, SSID: <%s>\n", 1804 network->ssid); 1805 dot11d_update_country(ieee, addr2, 1806 info_element->len, 1807 info_element->data); 1808 } 1809 } 1810 1811 if (IS_EQUAL_CIE_SRC(ieee, addr2)) 1812 UPDATE_CIE_WATCHDOG(ieee); 1813 } 1814 } 1815 1816 static void rtllib_parse_mife_generic(struct rtllib_device *ieee, 1817 struct rtllib_info_element *info_element, 1818 struct rtllib_network *network, 1819 u16 *tmp_htcap_len, 1820 u16 *tmp_htinfo_len) 1821 { 1822 u16 ht_realtek_agg_len = 0; 1823 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1824 1825 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network)) 1826 return; 1827 if (info_element->len >= 4 && 1828 info_element->data[0] == 0x00 && 1829 info_element->data[1] == 0x50 && 1830 info_element->data[2] == 0xf2 && 1831 info_element->data[3] == 0x01) { 1832 network->wpa_ie_len = min(info_element->len + 2, 1833 MAX_WPA_IE_LEN); 1834 memcpy(network->wpa_ie, info_element, network->wpa_ie_len); 1835 return; 1836 } 1837 if (info_element->len == 7 && 1838 info_element->data[0] == 0x00 && 1839 info_element->data[1] == 0xe0 && 1840 info_element->data[2] == 0x4c && 1841 info_element->data[3] == 0x01 && 1842 info_element->data[4] == 0x02) 1843 network->Turbo_Enable = 1; 1844 1845 if (*tmp_htcap_len == 0) { 1846 if (info_element->len >= 4 && 1847 info_element->data[0] == 0x00 && 1848 info_element->data[1] == 0x90 && 1849 info_element->data[2] == 0x4c && 1850 info_element->data[3] == 0x033) { 1851 *tmp_htcap_len = min_t(u8, info_element->len, 1852 MAX_IE_LEN); 1853 if (*tmp_htcap_len != 0) { 1854 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1855 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf)); 1856 memcpy(network->bssht.bdHTCapBuf, 1857 info_element->data, 1858 network->bssht.bdHTCapLen); 1859 } 1860 } 1861 if (*tmp_htcap_len != 0) { 1862 network->bssht.bdSupportHT = true; 1863 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0); 1864 } else { 1865 network->bssht.bdSupportHT = false; 1866 network->bssht.bdHT1R = false; 1867 } 1868 } 1869 1870 1871 if (*tmp_htinfo_len == 0) { 1872 if (info_element->len >= 4 && 1873 info_element->data[0] == 0x00 && 1874 info_element->data[1] == 0x90 && 1875 info_element->data[2] == 0x4c && 1876 info_element->data[3] == 0x034) { 1877 *tmp_htinfo_len = min_t(u8, info_element->len, 1878 MAX_IE_LEN); 1879 if (*tmp_htinfo_len != 0) { 1880 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1881 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf)); 1882 memcpy(network->bssht.bdHTInfoBuf, 1883 info_element->data, 1884 network->bssht.bdHTInfoLen); 1885 } 1886 } 1887 } 1888 1889 if (network->bssht.bdSupportHT) { 1890 if (info_element->len >= 4 && 1891 info_element->data[0] == 0x00 && 1892 info_element->data[1] == 0xe0 && 1893 info_element->data[2] == 0x4c && 1894 info_element->data[3] == 0x02) { 1895 ht_realtek_agg_len = min_t(u8, info_element->len, 1896 MAX_IE_LEN); 1897 memcpy(ht_realtek_agg_buf, info_element->data, 1898 info_element->len); 1899 } 1900 if (ht_realtek_agg_len >= 5) { 1901 network->realtek_cap_exit = true; 1902 network->bssht.bdRT2RTAggregation = true; 1903 1904 if ((ht_realtek_agg_buf[4] == 1) && 1905 (ht_realtek_agg_buf[5] & 0x02)) 1906 network->bssht.bdRT2RTLongSlotTime = true; 1907 1908 if ((ht_realtek_agg_buf[4] == 1) && 1909 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE)) 1910 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE; 1911 } 1912 } 1913 if (ht_realtek_agg_len >= 5) { 1914 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP)) 1915 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP; 1916 } 1917 1918 if ((info_element->len >= 3 && 1919 info_element->data[0] == 0x00 && 1920 info_element->data[1] == 0x05 && 1921 info_element->data[2] == 0xb5) || 1922 (info_element->len >= 3 && 1923 info_element->data[0] == 0x00 && 1924 info_element->data[1] == 0x0a && 1925 info_element->data[2] == 0xf7) || 1926 (info_element->len >= 3 && 1927 info_element->data[0] == 0x00 && 1928 info_element->data[1] == 0x10 && 1929 info_element->data[2] == 0x18)) { 1930 network->broadcom_cap_exist = true; 1931 } 1932 if (info_element->len >= 3 && 1933 info_element->data[0] == 0x00 && 1934 info_element->data[1] == 0x0c && 1935 info_element->data[2] == 0x43) 1936 network->ralink_cap_exist = true; 1937 if ((info_element->len >= 3 && 1938 info_element->data[0] == 0x00 && 1939 info_element->data[1] == 0x03 && 1940 info_element->data[2] == 0x7f) || 1941 (info_element->len >= 3 && 1942 info_element->data[0] == 0x00 && 1943 info_element->data[1] == 0x13 && 1944 info_element->data[2] == 0x74)) 1945 network->atheros_cap_exist = true; 1946 1947 if ((info_element->len >= 3 && 1948 info_element->data[0] == 0x00 && 1949 info_element->data[1] == 0x50 && 1950 info_element->data[2] == 0x43)) 1951 network->marvell_cap_exist = true; 1952 if (info_element->len >= 3 && 1953 info_element->data[0] == 0x00 && 1954 info_element->data[1] == 0x40 && 1955 info_element->data[2] == 0x96) 1956 network->cisco_cap_exist = true; 1957 1958 1959 if (info_element->len >= 3 && 1960 info_element->data[0] == 0x00 && 1961 info_element->data[1] == 0x0a && 1962 info_element->data[2] == 0xf5) 1963 network->airgo_cap_exist = true; 1964 1965 if (info_element->len > 4 && 1966 info_element->data[0] == 0x00 && 1967 info_element->data[1] == 0x40 && 1968 info_element->data[2] == 0x96 && 1969 info_element->data[3] == 0x01) { 1970 if (info_element->len == 6) { 1971 memcpy(network->CcxRmState, &info_element[4], 2); 1972 if (network->CcxRmState[0] != 0) 1973 network->bCcxRmEnable = true; 1974 else 1975 network->bCcxRmEnable = false; 1976 network->MBssidMask = network->CcxRmState[1] & 0x07; 1977 if (network->MBssidMask != 0) { 1978 network->bMBssidValid = true; 1979 network->MBssidMask = 0xff << 1980 (network->MBssidMask); 1981 ether_addr_copy(network->MBssid, 1982 network->bssid); 1983 network->MBssid[5] &= network->MBssidMask; 1984 } else { 1985 network->bMBssidValid = false; 1986 } 1987 } else { 1988 network->bCcxRmEnable = false; 1989 } 1990 } 1991 if (info_element->len > 4 && 1992 info_element->data[0] == 0x00 && 1993 info_element->data[1] == 0x40 && 1994 info_element->data[2] == 0x96 && 1995 info_element->data[3] == 0x03) { 1996 if (info_element->len == 5) { 1997 network->bWithCcxVerNum = true; 1998 network->BssCcxVerNumber = info_element->data[4]; 1999 } else { 2000 network->bWithCcxVerNum = false; 2001 network->BssCcxVerNumber = 0; 2002 } 2003 } 2004 if (info_element->len > 4 && 2005 info_element->data[0] == 0x00 && 2006 info_element->data[1] == 0x50 && 2007 info_element->data[2] == 0xf2 && 2008 info_element->data[3] == 0x04) { 2009 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n", 2010 info_element->len); 2011 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN); 2012 memcpy(network->wzc_ie, info_element, network->wzc_ie_len); 2013 } 2014 } 2015 2016 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element, 2017 struct rtllib_network *network, 2018 u16 *tmp_htcap_len) 2019 { 2020 struct bss_ht *ht = &network->bssht; 2021 2022 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN); 2023 if (*tmp_htcap_len != 0) { 2024 ht->bdHTSpecVer = HT_SPEC_VER_EWC; 2025 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len, 2026 sizeof(ht->bdHTCapBuf)); 2027 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen); 2028 2029 ht->bdSupportHT = true; 2030 ht->bdHT1R = ((((struct ht_capab_ele *) 2031 ht->bdHTCapBuf))->MCS[1]) == 0; 2032 2033 ht->bdBandWidth = (enum ht_channel_width) 2034 (((struct ht_capab_ele *) 2035 (ht->bdHTCapBuf))->ChlWidth); 2036 } else { 2037 ht->bdSupportHT = false; 2038 ht->bdHT1R = false; 2039 ht->bdBandWidth = HT_CHANNEL_WIDTH_20; 2040 } 2041 } 2042 2043 int rtllib_parse_info_param(struct rtllib_device *ieee, 2044 struct rtllib_info_element *info_element, 2045 u16 length, 2046 struct rtllib_network *network, 2047 struct rtllib_rx_stats *stats) 2048 { 2049 u8 i; 2050 short offset; 2051 u16 tmp_htcap_len = 0; 2052 u16 tmp_htinfo_len = 0; 2053 char rates_str[64]; 2054 char *p; 2055 2056 while (length >= sizeof(*info_element)) { 2057 if (sizeof(*info_element) + info_element->len > length) { 2058 netdev_dbg(ieee->dev, 2059 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n", 2060 info_element->len + sizeof(*info_element), 2061 length, info_element->id); 2062 /* We stop processing but don't return an error here 2063 * because some misbehaviour APs break this rule. ie. 2064 * Orinoco AP1000. 2065 */ 2066 break; 2067 } 2068 2069 switch (info_element->id) { 2070 case MFIE_TYPE_SSID: 2071 if (rtllib_is_empty_essid(info_element->data, 2072 info_element->len)) { 2073 network->flags |= NETWORK_EMPTY_ESSID; 2074 break; 2075 } 2076 2077 network->ssid_len = min(info_element->len, 2078 (u8) IW_ESSID_MAX_SIZE); 2079 memcpy(network->ssid, info_element->data, 2080 network->ssid_len); 2081 if (network->ssid_len < IW_ESSID_MAX_SIZE) 2082 memset(network->ssid + network->ssid_len, 0, 2083 IW_ESSID_MAX_SIZE - network->ssid_len); 2084 2085 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n", 2086 network->ssid, network->ssid_len); 2087 break; 2088 2089 case MFIE_TYPE_RATES: 2090 p = rates_str; 2091 network->rates_len = min(info_element->len, 2092 MAX_RATES_LENGTH); 2093 for (i = 0; i < network->rates_len; i++) { 2094 network->rates[i] = info_element->data[i]; 2095 p += snprintf(p, sizeof(rates_str) - 2096 (p - rates_str), "%02X ", 2097 network->rates[i]); 2098 if (rtllib_is_ofdm_rate 2099 (info_element->data[i])) { 2100 network->flags |= NETWORK_HAS_OFDM; 2101 if (info_element->data[i] & 2102 RTLLIB_BASIC_RATE_MASK) 2103 network->flags &= 2104 ~NETWORK_HAS_CCK; 2105 } 2106 2107 if (rtllib_is_cck_rate 2108 (info_element->data[i])) { 2109 network->flags |= NETWORK_HAS_CCK; 2110 } 2111 } 2112 2113 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n", 2114 rates_str, network->rates_len); 2115 break; 2116 2117 case MFIE_TYPE_RATES_EX: 2118 p = rates_str; 2119 network->rates_ex_len = min(info_element->len, 2120 MAX_RATES_EX_LENGTH); 2121 for (i = 0; i < network->rates_ex_len; i++) { 2122 network->rates_ex[i] = info_element->data[i]; 2123 p += snprintf(p, sizeof(rates_str) - 2124 (p - rates_str), "%02X ", 2125 network->rates_ex[i]); 2126 if (rtllib_is_ofdm_rate 2127 (info_element->data[i])) { 2128 network->flags |= NETWORK_HAS_OFDM; 2129 if (info_element->data[i] & 2130 RTLLIB_BASIC_RATE_MASK) 2131 network->flags &= 2132 ~NETWORK_HAS_CCK; 2133 } 2134 } 2135 2136 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n", 2137 rates_str, network->rates_ex_len); 2138 break; 2139 2140 case MFIE_TYPE_DS_SET: 2141 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n", 2142 info_element->data[0]); 2143 network->channel = info_element->data[0]; 2144 break; 2145 2146 case MFIE_TYPE_FH_SET: 2147 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n"); 2148 break; 2149 2150 case MFIE_TYPE_CF_SET: 2151 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n"); 2152 break; 2153 2154 case MFIE_TYPE_TIM: 2155 if (info_element->len < 4) 2156 break; 2157 2158 network->tim.tim_count = info_element->data[0]; 2159 network->tim.tim_period = info_element->data[1]; 2160 2161 network->dtim_period = info_element->data[1]; 2162 if (ieee->state != RTLLIB_LINKED) 2163 break; 2164 network->last_dtim_sta_time = jiffies; 2165 2166 network->dtim_data = RTLLIB_DTIM_VALID; 2167 2168 2169 if (info_element->data[2] & 1) 2170 network->dtim_data |= RTLLIB_DTIM_MBCAST; 2171 2172 offset = (info_element->data[2] >> 1)*2; 2173 2174 2175 if (ieee->assoc_id < 8*offset || 2176 ieee->assoc_id > 8*(offset + info_element->len - 3)) 2177 break; 2178 2179 offset = (ieee->assoc_id / 8) - offset; 2180 if (info_element->data[3 + offset] & 2181 (1 << (ieee->assoc_id % 8))) 2182 network->dtim_data |= RTLLIB_DTIM_UCAST; 2183 2184 network->listen_interval = network->dtim_period; 2185 break; 2186 2187 case MFIE_TYPE_ERP: 2188 network->erp_value = info_element->data[0]; 2189 network->flags |= NETWORK_HAS_ERP_VALUE; 2190 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n", 2191 network->erp_value); 2192 break; 2193 case MFIE_TYPE_IBSS_SET: 2194 network->atim_window = info_element->data[0]; 2195 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n", 2196 network->atim_window); 2197 break; 2198 2199 case MFIE_TYPE_CHALLENGE: 2200 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n"); 2201 break; 2202 2203 case MFIE_TYPE_GENERIC: 2204 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n", 2205 info_element->len); 2206 2207 rtllib_parse_mife_generic(ieee, info_element, network, 2208 &tmp_htcap_len, 2209 &tmp_htinfo_len); 2210 break; 2211 2212 case MFIE_TYPE_RSN: 2213 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n", 2214 info_element->len); 2215 network->rsn_ie_len = min(info_element->len + 2, 2216 MAX_WPA_IE_LEN); 2217 memcpy(network->rsn_ie, info_element, 2218 network->rsn_ie_len); 2219 break; 2220 2221 case MFIE_TYPE_HT_CAP: 2222 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n", 2223 info_element->len); 2224 2225 rtllib_parse_mfie_ht_cap(info_element, network, 2226 &tmp_htcap_len); 2227 break; 2228 2229 2230 case MFIE_TYPE_HT_INFO: 2231 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n", 2232 info_element->len); 2233 tmp_htinfo_len = min_t(u8, info_element->len, 2234 MAX_IE_LEN); 2235 if (tmp_htinfo_len) { 2236 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; 2237 network->bssht.bdHTInfoLen = tmp_htinfo_len > 2238 sizeof(network->bssht.bdHTInfoBuf) ? 2239 sizeof(network->bssht.bdHTInfoBuf) : 2240 tmp_htinfo_len; 2241 memcpy(network->bssht.bdHTInfoBuf, 2242 info_element->data, 2243 network->bssht.bdHTInfoLen); 2244 } 2245 break; 2246 2247 case MFIE_TYPE_AIRONET: 2248 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n", 2249 info_element->len); 2250 if (info_element->len > IE_CISCO_FLAG_POSITION) { 2251 network->bWithAironetIE = true; 2252 2253 if ((info_element->data[IE_CISCO_FLAG_POSITION] 2254 & SUPPORT_CKIP_MIC) || 2255 (info_element->data[IE_CISCO_FLAG_POSITION] 2256 & SUPPORT_CKIP_PK)) 2257 network->bCkipSupported = true; 2258 else 2259 network->bCkipSupported = false; 2260 } else { 2261 network->bWithAironetIE = false; 2262 network->bCkipSupported = false; 2263 } 2264 break; 2265 case MFIE_TYPE_QOS_PARAMETER: 2266 netdev_err(ieee->dev, 2267 "QoS Error need to parse QOS_PARAMETER IE\n"); 2268 break; 2269 2270 case MFIE_TYPE_COUNTRY: 2271 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n", 2272 info_element->len); 2273 rtllib_extract_country_ie(ieee, info_element, network, 2274 network->bssid); 2275 break; 2276 /* TODO */ 2277 default: 2278 netdev_dbg(ieee->dev, 2279 "Unsupported info element: %s (%d)\n", 2280 get_info_element_string(info_element->id), 2281 info_element->id); 2282 break; 2283 } 2284 2285 length -= sizeof(*info_element) + info_element->len; 2286 info_element = 2287 (struct rtllib_info_element *)&info_element-> 2288 data[info_element->len]; 2289 } 2290 2291 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 2292 !network->cisco_cap_exist && !network->ralink_cap_exist && 2293 !network->bssht.bdRT2RTAggregation) 2294 network->unknown_cap_exist = true; 2295 else 2296 network->unknown_cap_exist = false; 2297 return 0; 2298 } 2299 2300 static long rtllib_translate_todbm(u8 signal_strength_index) 2301 { 2302 long signal_power; 2303 2304 signal_power = (long)((signal_strength_index + 1) >> 1); 2305 signal_power -= 95; 2306 2307 return signal_power; 2308 } 2309 2310 static inline int rtllib_network_init( 2311 struct rtllib_device *ieee, 2312 struct rtllib_probe_response *beacon, 2313 struct rtllib_network *network, 2314 struct rtllib_rx_stats *stats) 2315 { 2316 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data)); 2317 2318 /* Pull out fixed field data */ 2319 ether_addr_copy(network->bssid, beacon->header.addr3); 2320 network->capability = le16_to_cpu(beacon->capability); 2321 network->last_scanned = jiffies; 2322 network->time_stamp[0] = beacon->time_stamp[0]; 2323 network->time_stamp[1] = beacon->time_stamp[1]; 2324 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 2325 /* Where to pull this? beacon->listen_interval;*/ 2326 network->listen_interval = 0x0A; 2327 network->rates_len = network->rates_ex_len = 0; 2328 network->ssid_len = 0; 2329 network->hidden_ssid_len = 0; 2330 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid)); 2331 network->flags = 0; 2332 network->atim_window = 0; 2333 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2334 0x3 : 0x0; 2335 network->berp_info_valid = false; 2336 network->broadcom_cap_exist = false; 2337 network->ralink_cap_exist = false; 2338 network->atheros_cap_exist = false; 2339 network->cisco_cap_exist = false; 2340 network->unknown_cap_exist = false; 2341 network->realtek_cap_exit = false; 2342 network->marvell_cap_exist = false; 2343 network->airgo_cap_exist = false; 2344 network->Turbo_Enable = 0; 2345 network->SignalStrength = stats->SignalStrength; 2346 network->RSSI = stats->SignalStrength; 2347 network->CountryIeLen = 0; 2348 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2349 HTInitializeBssDesc(&network->bssht); 2350 if (stats->freq == RTLLIB_52GHZ_BAND) { 2351 /* for A band (No DS info) */ 2352 network->channel = stats->received_channel; 2353 } else 2354 network->flags |= NETWORK_HAS_CCK; 2355 2356 network->wpa_ie_len = 0; 2357 network->rsn_ie_len = 0; 2358 network->wzc_ie_len = 0; 2359 2360 if (rtllib_parse_info_param(ieee, 2361 beacon->info_element, 2362 (stats->len - sizeof(*beacon)), 2363 network, 2364 stats)) 2365 return 1; 2366 2367 network->mode = 0; 2368 if (stats->freq == RTLLIB_52GHZ_BAND) 2369 network->mode = IEEE_A; 2370 else { 2371 if (network->flags & NETWORK_HAS_OFDM) 2372 network->mode |= IEEE_G; 2373 if (network->flags & NETWORK_HAS_CCK) 2374 network->mode |= IEEE_B; 2375 } 2376 2377 if (network->mode == 0) { 2378 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n", 2379 escape_essid(network->ssid, network->ssid_len), 2380 network->bssid); 2381 return 1; 2382 } 2383 2384 if (network->bssht.bdSupportHT) { 2385 if (network->mode == IEEE_A) 2386 network->mode = IEEE_N_5G; 2387 else if (network->mode & (IEEE_G | IEEE_B)) 2388 network->mode = IEEE_N_24G; 2389 } 2390 if (rtllib_is_empty_essid(network->ssid, network->ssid_len)) 2391 network->flags |= NETWORK_EMPTY_ESSID; 2392 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2393 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25; 2394 2395 memcpy(&network->stats, stats, sizeof(network->stats)); 2396 2397 return 0; 2398 } 2399 2400 static inline int is_same_network(struct rtllib_network *src, 2401 struct rtllib_network *dst, u8 ssidbroad) 2402 { 2403 /* A network is only a duplicate if the channel, BSSID, ESSID 2404 * and the capability field (in particular IBSS and BSS) all match. 2405 * We treat all <hidden> with the same BSSID and channel 2406 * as one network 2407 */ 2408 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) && 2409 (src->channel == dst->channel) && 2410 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2411 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || 2412 (!ssidbroad)) && 2413 ((src->capability & WLAN_CAPABILITY_IBSS) == 2414 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2415 ((src->capability & WLAN_CAPABILITY_ESS) == 2416 (dst->capability & WLAN_CAPABILITY_ESS))); 2417 } 2418 2419 2420 static inline void update_network(struct rtllib_device *ieee, 2421 struct rtllib_network *dst, 2422 struct rtllib_network *src) 2423 { 2424 int qos_active; 2425 u8 old_param; 2426 2427 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); 2428 dst->capability = src->capability; 2429 memcpy(dst->rates, src->rates, src->rates_len); 2430 dst->rates_len = src->rates_len; 2431 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2432 dst->rates_ex_len = src->rates_ex_len; 2433 if (src->ssid_len > 0) { 2434 if (dst->ssid_len == 0) { 2435 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid)); 2436 dst->hidden_ssid_len = src->ssid_len; 2437 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len); 2438 } else { 2439 memset(dst->ssid, 0, dst->ssid_len); 2440 dst->ssid_len = src->ssid_len; 2441 memcpy(dst->ssid, src->ssid, src->ssid_len); 2442 } 2443 } 2444 dst->mode = src->mode; 2445 dst->flags = src->flags; 2446 dst->time_stamp[0] = src->time_stamp[0]; 2447 dst->time_stamp[1] = src->time_stamp[1]; 2448 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2449 dst->erp_value = src->erp_value; 2450 dst->berp_info_valid = src->berp_info_valid = true; 2451 } 2452 dst->beacon_interval = src->beacon_interval; 2453 dst->listen_interval = src->listen_interval; 2454 dst->atim_window = src->atim_window; 2455 dst->dtim_period = src->dtim_period; 2456 dst->dtim_data = src->dtim_data; 2457 dst->last_dtim_sta_time = src->last_dtim_sta_time; 2458 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters)); 2459 2460 dst->bssht.bdSupportHT = src->bssht.bdSupportHT; 2461 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; 2462 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen; 2463 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, 2464 src->bssht.bdHTCapLen); 2465 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen; 2466 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, 2467 src->bssht.bdHTInfoLen); 2468 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; 2469 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; 2470 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2471 dst->ralink_cap_exist = src->ralink_cap_exist; 2472 dst->atheros_cap_exist = src->atheros_cap_exist; 2473 dst->realtek_cap_exit = src->realtek_cap_exit; 2474 dst->marvell_cap_exist = src->marvell_cap_exist; 2475 dst->cisco_cap_exist = src->cisco_cap_exist; 2476 dst->airgo_cap_exist = src->airgo_cap_exist; 2477 dst->unknown_cap_exist = src->unknown_cap_exist; 2478 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2479 dst->wpa_ie_len = src->wpa_ie_len; 2480 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2481 dst->rsn_ie_len = src->rsn_ie_len; 2482 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len); 2483 dst->wzc_ie_len = src->wzc_ie_len; 2484 2485 dst->last_scanned = jiffies; 2486 /* qos related parameters */ 2487 qos_active = dst->qos_data.active; 2488 old_param = dst->qos_data.param_count; 2489 dst->qos_data.supported = src->qos_data.supported; 2490 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS) 2491 memcpy(&dst->qos_data, &src->qos_data, 2492 sizeof(struct rtllib_qos_data)); 2493 if (dst->qos_data.supported == 1) { 2494 if (dst->ssid_len) 2495 netdev_dbg(ieee->dev, 2496 "QoS the network %s is QoS supported\n", 2497 dst->ssid); 2498 else 2499 netdev_dbg(ieee->dev, 2500 "QoS the network is QoS supported\n"); 2501 } 2502 dst->qos_data.active = qos_active; 2503 dst->qos_data.old_param_count = old_param; 2504 2505 dst->wmm_info = src->wmm_info; 2506 if (src->wmm_param[0].ac_aci_acm_aifsn || 2507 src->wmm_param[1].ac_aci_acm_aifsn || 2508 src->wmm_param[2].ac_aci_acm_aifsn || 2509 src->wmm_param[3].ac_aci_acm_aifsn) 2510 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2511 2512 dst->SignalStrength = src->SignalStrength; 2513 dst->RSSI = src->RSSI; 2514 dst->Turbo_Enable = src->Turbo_Enable; 2515 2516 dst->CountryIeLen = src->CountryIeLen; 2517 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2518 2519 dst->bWithAironetIE = src->bWithAironetIE; 2520 dst->bCkipSupported = src->bCkipSupported; 2521 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2522 dst->bCcxRmEnable = src->bCcxRmEnable; 2523 dst->MBssidMask = src->MBssidMask; 2524 dst->bMBssidValid = src->bMBssidValid; 2525 memcpy(dst->MBssid, src->MBssid, 6); 2526 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2527 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2528 } 2529 2530 static inline int is_beacon(u16 fc) 2531 { 2532 return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON); 2533 } 2534 2535 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel) 2536 { 2537 if (channel > MAX_CHANNEL_NUMBER) { 2538 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2539 return 0; 2540 } 2541 2542 if (rtllib->active_channel_map[channel] == 2) 2543 return 1; 2544 2545 return 0; 2546 } 2547 2548 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel) 2549 { 2550 if (channel > MAX_CHANNEL_NUMBER) { 2551 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2552 return 0; 2553 } 2554 if (rtllib->active_channel_map[channel] > 0) 2555 return 1; 2556 2557 return 0; 2558 } 2559 EXPORT_SYMBOL(rtllib_legal_channel); 2560 2561 static inline void rtllib_process_probe_response( 2562 struct rtllib_device *ieee, 2563 struct rtllib_probe_response *beacon, 2564 struct rtllib_rx_stats *stats) 2565 { 2566 struct rtllib_network *target; 2567 struct rtllib_network *oldest = NULL; 2568 struct rtllib_info_element *info_element = &beacon->info_element[0]; 2569 unsigned long flags; 2570 short renew; 2571 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), 2572 GFP_ATOMIC); 2573 u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl); 2574 2575 if (!network) 2576 return; 2577 2578 netdev_dbg(ieee->dev, 2579 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2580 escape_essid(info_element->data, info_element->len), 2581 beacon->header.addr3, 2582 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0', 2583 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0', 2584 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0', 2585 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0', 2586 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0', 2587 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0', 2588 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0', 2589 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0', 2590 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0', 2591 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0', 2592 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0', 2593 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0', 2594 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0', 2595 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0', 2596 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0', 2597 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0'); 2598 2599 if (rtllib_network_init(ieee, beacon, network, stats)) { 2600 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n", 2601 escape_essid(info_element->data, info_element->len), 2602 beacon->header.addr3, 2603 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2604 goto free_network; 2605 } 2606 2607 2608 if (!rtllib_legal_channel(ieee, network->channel)) 2609 goto free_network; 2610 2611 if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) { 2612 if (IsPassiveChannel(ieee, network->channel)) { 2613 netdev_info(ieee->dev, 2614 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", 2615 network->channel); 2616 goto free_network; 2617 } 2618 } 2619 2620 /* The network parsed correctly -- so now we scan our known networks 2621 * to see if we can find it in our list. 2622 * 2623 * NOTE: This search is definitely not optimized. Once its doing 2624 * the "right thing" we'll optimize it for efficiency if 2625 * necessary 2626 */ 2627 2628 /* Search for this entry in the list and update it if it is 2629 * already there. 2630 */ 2631 2632 spin_lock_irqsave(&ieee->lock, flags); 2633 if (is_same_network(&ieee->current_network, network, 2634 (network->ssid_len ? 1 : 0))) { 2635 update_network(ieee, &ieee->current_network, network); 2636 if ((ieee->current_network.mode == IEEE_N_24G || 2637 ieee->current_network.mode == IEEE_G) && 2638 ieee->current_network.berp_info_valid) { 2639 if (ieee->current_network.erp_value & ERP_UseProtection) 2640 ieee->current_network.buseprotection = true; 2641 else 2642 ieee->current_network.buseprotection = false; 2643 } 2644 if (is_beacon(frame_ctl)) { 2645 if (ieee->state >= RTLLIB_LINKED) 2646 ieee->LinkDetectInfo.NumRecvBcnInPeriod++; 2647 } 2648 } 2649 list_for_each_entry(target, &ieee->network_list, list) { 2650 if (is_same_network(target, network, 2651 (target->ssid_len ? 1 : 0))) 2652 break; 2653 if ((oldest == NULL) || 2654 (target->last_scanned < oldest->last_scanned)) 2655 oldest = target; 2656 } 2657 2658 /* If we didn't find a match, then get a new network slot to initialize 2659 * with this beacon's information 2660 */ 2661 if (&target->list == &ieee->network_list) { 2662 if (list_empty(&ieee->network_free_list)) { 2663 /* If there are no more slots, expire the oldest */ 2664 list_del(&oldest->list); 2665 target = oldest; 2666 netdev_dbg(ieee->dev, 2667 "Expired '%s' ( %pM) from network list.\n", 2668 escape_essid(target->ssid, target->ssid_len), 2669 target->bssid); 2670 } else { 2671 /* Otherwise just pull from the free list */ 2672 target = list_entry(ieee->network_free_list.next, 2673 struct rtllib_network, list); 2674 list_del(ieee->network_free_list.next); 2675 } 2676 2677 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n", 2678 escape_essid(network->ssid, network->ssid_len), 2679 network->bssid, 2680 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2681 2682 memcpy(target, network, sizeof(*target)); 2683 list_add_tail(&target->list, &ieee->network_list); 2684 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2685 rtllib_softmac_new_net(ieee, network); 2686 } else { 2687 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n", 2688 escape_essid(target->ssid, target->ssid_len), 2689 target->bssid, 2690 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2691 2692 /* we have an entry and we are going to update it. But this 2693 * entry may be already expired. In this case we do the same 2694 * as we found a new net and call the new_net handler 2695 */ 2696 renew = !time_after(target->last_scanned + ieee->scan_age, 2697 jiffies); 2698 if ((!target->ssid_len) && 2699 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0)) 2700 || ((ieee->current_network.ssid_len == network->ssid_len) && 2701 (strncmp(ieee->current_network.ssid, network->ssid, 2702 network->ssid_len) == 0) && 2703 (ieee->state == RTLLIB_NOLINK)))) 2704 renew = 1; 2705 update_network(ieee, target, network); 2706 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2707 rtllib_softmac_new_net(ieee, network); 2708 } 2709 2710 spin_unlock_irqrestore(&ieee->lock, flags); 2711 if (is_beacon(frame_ctl) && 2712 is_same_network(&ieee->current_network, network, 2713 (network->ssid_len ? 1 : 0)) && 2714 (ieee->state == RTLLIB_LINKED)) { 2715 if (ieee->handle_beacon != NULL) 2716 ieee->handle_beacon(ieee->dev, beacon, 2717 &ieee->current_network); 2718 } 2719 free_network: 2720 kfree(network); 2721 } 2722 2723 static void rtllib_rx_mgt(struct rtllib_device *ieee, 2724 struct sk_buff *skb, 2725 struct rtllib_rx_stats *stats) 2726 { 2727 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data; 2728 2729 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) != 2730 RTLLIB_STYPE_PROBE_RESP) && 2731 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) != 2732 RTLLIB_STYPE_BEACON)) 2733 ieee->last_rx_ps_time = jiffies; 2734 2735 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { 2736 2737 case RTLLIB_STYPE_BEACON: 2738 netdev_dbg(ieee->dev, "received BEACON (%d)\n", 2739 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2740 rtllib_process_probe_response( 2741 ieee, (struct rtllib_probe_response *)header, 2742 stats); 2743 2744 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED && 2745 ieee->iw_mode == IW_MODE_INFRA && 2746 ieee->state == RTLLIB_LINKED)) 2747 tasklet_schedule(&ieee->ps_task); 2748 2749 break; 2750 2751 case RTLLIB_STYPE_PROBE_RESP: 2752 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n", 2753 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2754 rtllib_process_probe_response(ieee, 2755 (struct rtllib_probe_response *)header, stats); 2756 break; 2757 case RTLLIB_STYPE_PROBE_REQ: 2758 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n", 2759 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2760 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) && 2761 ((ieee->iw_mode == IW_MODE_ADHOC || 2762 ieee->iw_mode == IW_MODE_MASTER) && 2763 ieee->state == RTLLIB_LINKED)) 2764 rtllib_rx_probe_rq(ieee, skb); 2765 break; 2766 } 2767 } 2768