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 38 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb, 39 struct rtllib_rx_stats *stats); 40 41 static inline void rtllib_monitor_rx(struct rtllib_device *ieee, 42 struct sk_buff *skb, 43 struct rtllib_rx_stats *rx_status, 44 size_t hdr_length) 45 { 46 skb->dev = ieee->dev; 47 skb_reset_mac_header(skb); 48 skb_pull(skb, hdr_length); 49 skb->pkt_type = PACKET_OTHERHOST; 50 skb->protocol = htons(ETH_P_80211_RAW); 51 memset(skb->cb, 0, sizeof(skb->cb)); 52 netif_rx(skb); 53 } 54 55 /* Called only as a tasklet (software IRQ) */ 56 static struct rtllib_frag_entry * 57 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq, 58 unsigned int frag, u8 tid, u8 *src, u8 *dst) 59 { 60 struct rtllib_frag_entry *entry; 61 int i; 62 63 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) { 64 entry = &ieee->frag_cache[tid][i]; 65 if (entry->skb && 66 time_after(jiffies, entry->first_frag_time + 2 * HZ)) { 67 netdev_dbg(ieee->dev, 68 "expiring fragment cache entry seq=%u last_frag=%u\n", 69 entry->seq, entry->last_frag); 70 dev_kfree_skb_any(entry->skb); 71 entry->skb = NULL; 72 } 73 74 if (entry->skb && entry->seq == seq && 75 (entry->last_frag + 1 == frag || frag == -1) && 76 memcmp(entry->src_addr, src, ETH_ALEN) == 0 && 77 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) 78 return entry; 79 } 80 81 return NULL; 82 } 83 84 /* Called only as a tasklet (software IRQ) */ 85 static struct sk_buff * 86 rtllib_frag_cache_get(struct rtllib_device *ieee, 87 struct ieee80211_hdr *hdr) 88 { 89 struct sk_buff *skb = NULL; 90 u16 fc = le16_to_cpu(hdr->frame_control); 91 u16 sc = le16_to_cpu(hdr->seq_ctrl); 92 unsigned int frag = WLAN_GET_SEQ_FRAG(sc); 93 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 94 struct rtllib_frag_entry *entry; 95 struct ieee80211_qos_hdr *hdr_3addrqos; 96 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 97 u8 tid; 98 99 if (ieee80211_has_a4(hdr->frame_control) && 100 RTLLIB_QOS_HAS_SEQ(fc)) { 101 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr; 102 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 103 tid = UP2AC(tid); 104 tid++; 105 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 106 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr; 107 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 108 tid = UP2AC(tid); 109 tid++; 110 } else { 111 tid = 0; 112 } 113 114 if (frag == 0) { 115 /* Reserve enough space to fit maximum frame length */ 116 skb = dev_alloc_skb(ieee->dev->mtu + 117 sizeof(struct ieee80211_hdr) + 118 8 /* LLC */ + 119 2 /* alignment */ + 120 8 /* WEP */ + 121 ETH_ALEN /* WDS */ + 122 /* QOS Control */ 123 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0)); 124 if (!skb) 125 return NULL; 126 127 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; 128 ieee->frag_next_idx[tid]++; 129 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN) 130 ieee->frag_next_idx[tid] = 0; 131 132 if (entry->skb) 133 dev_kfree_skb_any(entry->skb); 134 135 entry->first_frag_time = jiffies; 136 entry->seq = seq; 137 entry->last_frag = frag; 138 entry->skb = skb; 139 ether_addr_copy(entry->src_addr, hdr->addr2); 140 ether_addr_copy(entry->dst_addr, hdr->addr1); 141 } else { 142 /* received a fragment of a frame for which the head fragment 143 * should have already been received 144 */ 145 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2, 146 hdr->addr1); 147 if (entry) { 148 entry->last_frag = frag; 149 skb = entry->skb; 150 } 151 } 152 153 return skb; 154 } 155 156 /* Called only as a tasklet (software IRQ) */ 157 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee, 158 struct ieee80211_hdr *hdr) 159 { 160 u16 fc = le16_to_cpu(hdr->frame_control); 161 u16 sc = le16_to_cpu(hdr->seq_ctrl); 162 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 163 struct rtllib_frag_entry *entry; 164 struct ieee80211_qos_hdr *hdr_3addrqos; 165 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 166 u8 tid; 167 168 if (ieee80211_has_a4(hdr->frame_control) && 169 RTLLIB_QOS_HAS_SEQ(fc)) { 170 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr; 171 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 172 tid = UP2AC(tid); 173 tid++; 174 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 175 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr; 176 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 177 tid = UP2AC(tid); 178 tid++; 179 } else { 180 tid = 0; 181 } 182 183 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, 184 hdr->addr1); 185 186 if (!entry) { 187 netdev_dbg(ieee->dev, 188 "Couldn't invalidate fragment cache entry (seq=%u)\n", 189 seq); 190 return -1; 191 } 192 193 entry->skb = NULL; 194 return 0; 195 } 196 197 /* rtllib_rx_frame_mgtmt 198 * 199 * Responsible for handling management control frames 200 * 201 * Called by rtllib_rx 202 */ 203 static inline int 204 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb, 205 struct rtllib_rx_stats *rx_stats, u16 type, 206 u16 stype) 207 { 208 /* On the struct stats definition there is written that 209 * this is not mandatory.... but seems that the probe 210 * response parser uses it 211 */ 212 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data; 213 214 rx_stats->len = skb->len; 215 rtllib_rx_mgt(ieee, skb, rx_stats); 216 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { 217 dev_kfree_skb_any(skb); 218 return 0; 219 } 220 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype); 221 222 dev_kfree_skb_any(skb); 223 224 return 0; 225 } 226 227 /* No encapsulation header if EtherType < 0x600 (=length) */ 228 229 /* Called by rtllib_rx_frame_decrypt */ 230 static int rtllib_is_eapol_frame(struct rtllib_device *ieee, 231 struct sk_buff *skb, size_t hdrlen) 232 { 233 struct net_device *dev = ieee->dev; 234 u16 fc, ethertype; 235 struct ieee80211_hdr *hdr; 236 u8 *pos; 237 238 if (skb->len < 24) 239 return 0; 240 241 hdr = (struct ieee80211_hdr *)skb->data; 242 fc = le16_to_cpu(hdr->frame_control); 243 244 /* check that the frame is unicast frame to us */ 245 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 246 IEEE80211_FCTL_TODS && 247 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && 248 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { 249 /* ToDS frame with own addr BSSID and DA */ 250 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 251 IEEE80211_FCTL_FROMDS && 252 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { 253 /* FromDS frame with own addr as DA */ 254 } else { 255 return 0; 256 } 257 258 if (skb->len < 24 + 8) 259 return 0; 260 261 /* check for port access entity Ethernet type */ 262 pos = skb->data + hdrlen; 263 ethertype = (pos[6] << 8) | pos[7]; 264 if (ethertype == ETH_P_PAE) 265 return 1; 266 267 return 0; 268 } 269 270 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 271 static inline int 272 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 273 struct lib80211_crypt_data *crypt) 274 { 275 struct ieee80211_hdr *hdr; 276 int res, hdrlen; 277 278 if (!crypt || !crypt->ops->decrypt_mpdu) 279 return 0; 280 281 if (ieee->hwsec_active) { 282 struct cb_desc *tcb_desc = (struct cb_desc *) 283 (skb->cb + MAX_DEV_ADDR_SIZE); 284 285 tcb_desc->bHwSec = 1; 286 287 if (ieee->need_sw_enc) 288 tcb_desc->bHwSec = 0; 289 } 290 291 hdr = (struct ieee80211_hdr *)skb->data; 292 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control)); 293 294 atomic_inc(&crypt->refcnt); 295 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); 296 atomic_dec(&crypt->refcnt); 297 if (res < 0) { 298 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n", 299 hdr->addr2, res); 300 if (res == -2) 301 netdev_dbg(ieee->dev, 302 "Decryption failed ICV mismatch (key %d)\n", 303 skb->data[hdrlen + 3] >> 6); 304 return -1; 305 } 306 307 return res; 308 } 309 310 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 311 static inline int 312 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb, 313 int keyidx, struct lib80211_crypt_data *crypt) 314 { 315 struct ieee80211_hdr *hdr; 316 int res, hdrlen; 317 318 if (!crypt || !crypt->ops->decrypt_msdu) 319 return 0; 320 if (ieee->hwsec_active) { 321 struct cb_desc *tcb_desc = (struct cb_desc *) 322 (skb->cb + MAX_DEV_ADDR_SIZE); 323 324 tcb_desc->bHwSec = 1; 325 326 if (ieee->need_sw_enc) 327 tcb_desc->bHwSec = 0; 328 } 329 330 hdr = (struct ieee80211_hdr *)skb->data; 331 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control)); 332 333 atomic_inc(&crypt->refcnt); 334 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); 335 atomic_dec(&crypt->refcnt); 336 if (res < 0) { 337 netdev_dbg(ieee->dev, 338 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n", 339 hdr->addr2, keyidx); 340 return -1; 341 } 342 343 return 0; 344 } 345 346 /* this function is stolen from ipw2200 driver*/ 347 #define IEEE_PACKET_RETRY_TIME (5 * HZ) 348 static int is_duplicate_packet(struct rtllib_device *ieee, 349 struct ieee80211_hdr *header) 350 { 351 u16 fc = le16_to_cpu(header->frame_control); 352 u16 sc = le16_to_cpu(header->seq_ctrl); 353 u16 seq = WLAN_GET_SEQ_SEQ(sc); 354 u16 frag = WLAN_GET_SEQ_FRAG(sc); 355 u16 *last_seq, *last_frag; 356 unsigned long *last_time; 357 struct ieee80211_qos_hdr *hdr_3addrqos; 358 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 359 u8 tid; 360 361 if (ieee80211_has_a4(header->frame_control) && 362 RTLLIB_QOS_HAS_SEQ(fc)) { 363 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)header; 364 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 365 tid = UP2AC(tid); 366 tid++; 367 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 368 hdr_3addrqos = (struct ieee80211_qos_hdr *)header; 369 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 370 tid = UP2AC(tid); 371 tid++; 372 } else { 373 tid = 0; 374 } 375 376 switch (ieee->iw_mode) { 377 case IW_MODE_INFRA: 378 last_seq = &ieee->last_rxseq_num[tid]; 379 last_frag = &ieee->last_rxfrag_num[tid]; 380 last_time = &ieee->last_packet_time[tid]; 381 break; 382 default: 383 return 0; 384 } 385 386 if ((*last_seq == seq) && 387 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { 388 if (*last_frag == frag) 389 goto drop; 390 if (*last_frag + 1 != frag) 391 /* out-of-order fragment */ 392 goto drop; 393 } else { 394 *last_seq = seq; 395 } 396 397 *last_frag = frag; 398 *last_time = jiffies; 399 return 0; 400 401 drop: 402 403 return 1; 404 } 405 406 static bool AddReorderEntry(struct rx_ts_record *ts, 407 struct rx_reorder_entry *pReorderEntry) 408 { 409 struct list_head *pList = &ts->rx_pending_pkt_list; 410 411 while (pList->next != &ts->rx_pending_pkt_list) { 412 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *) 413 list_entry(pList->next, struct rx_reorder_entry, 414 list))->SeqNum)) 415 pList = pList->next; 416 else if (SN_EQUAL(pReorderEntry->SeqNum, 417 ((struct rx_reorder_entry *)list_entry(pList->next, 418 struct rx_reorder_entry, list))->SeqNum)) 419 return false; 420 else 421 break; 422 } 423 pReorderEntry->list.next = pList->next; 424 pReorderEntry->list.next->prev = &pReorderEntry->list; 425 pReorderEntry->list.prev = pList; 426 pList->next = &pReorderEntry->list; 427 428 return true; 429 } 430 431 void rtllib_indicate_packets(struct rtllib_device *ieee, 432 struct rtllib_rxb **prxbIndicateArray, u8 index) 433 { 434 struct net_device_stats *stats = &ieee->stats; 435 u8 i = 0, j = 0; 436 u16 ethertype; 437 438 for (j = 0; j < index; j++) { 439 struct rtllib_rxb *prxb = prxbIndicateArray[j]; 440 441 for (i = 0; i < prxb->nr_subframes; i++) { 442 struct sk_buff *sub_skb = prxb->subframes[i]; 443 444 /* convert hdr + possible LLC headers into Ethernet header */ 445 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 446 if (sub_skb->len >= 8 && 447 ((memcmp(sub_skb->data, rfc1042_header, 448 SNAP_SIZE) == 0 && 449 ethertype != ETH_P_AARP && 450 ethertype != ETH_P_IPX) || 451 memcmp(sub_skb->data, bridge_tunnel_header, 452 SNAP_SIZE) == 0)) { 453 /* remove RFC1042 or Bridge-Tunnel encapsulation 454 * and replace EtherType 455 */ 456 skb_pull(sub_skb, SNAP_SIZE); 457 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 458 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 459 } else { 460 u16 len; 461 /* Leave Ethernet header part of hdr and full payload */ 462 len = sub_skb->len; 463 memcpy(skb_push(sub_skb, 2), &len, 2); 464 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 465 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 466 } 467 468 /* Indicate the packets to upper layer */ 469 if (sub_skb) { 470 stats->rx_packets++; 471 stats->rx_bytes += sub_skb->len; 472 473 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 474 sub_skb->protocol = eth_type_trans(sub_skb, 475 ieee->dev); 476 sub_skb->dev = ieee->dev; 477 sub_skb->dev->stats.rx_packets++; 478 sub_skb->dev->stats.rx_bytes += sub_skb->len; 479 /* 802.11 crc not sufficient */ 480 sub_skb->ip_summed = CHECKSUM_NONE; 481 ieee->last_rx_ps_time = jiffies; 482 netif_rx(sub_skb); 483 } 484 } 485 kfree(prxb); 486 prxb = NULL; 487 } 488 } 489 490 void rtllib_flush_rx_ts_pending_pkts(struct rtllib_device *ieee, 491 struct rx_ts_record *ts) 492 { 493 struct rx_reorder_entry *pRxReorderEntry; 494 u8 RfdCnt = 0; 495 496 del_timer_sync(&ts->rx_pkt_pending_timer); 497 while (!list_empty(&ts->rx_pending_pkt_list)) { 498 if (RfdCnt >= REORDER_WIN_SIZE) { 499 netdev_info(ieee->dev, 500 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", 501 __func__); 502 break; 503 } 504 505 pRxReorderEntry = (struct rx_reorder_entry *) 506 list_entry(ts->rx_pending_pkt_list.prev, 507 struct rx_reorder_entry, list); 508 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__, 509 pRxReorderEntry->SeqNum); 510 list_del_init(&pRxReorderEntry->list); 511 512 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb; 513 514 RfdCnt = RfdCnt + 1; 515 list_add_tail(&pRxReorderEntry->list, 516 &ieee->RxReorder_Unused_List); 517 } 518 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt); 519 520 ts->rx_indicate_seq = 0xffff; 521 } 522 523 static void RxReorderIndicatePacket(struct rtllib_device *ieee, 524 struct rtllib_rxb *prxb, 525 struct rx_ts_record *ts, u16 SeqNum) 526 { 527 struct rt_hi_throughput *ht_info = ieee->ht_info; 528 struct rx_reorder_entry *pReorderEntry = NULL; 529 u8 WinSize = ht_info->rx_reorder_win_size; 530 u16 WinEnd = 0; 531 u8 index = 0; 532 bool bMatchWinStart = false, bPktInBuf = false; 533 unsigned long flags; 534 535 netdev_dbg(ieee->dev, 536 "%s(): Seq is %d, ts->rx_indicate_seq is %d, WinSize is %d\n", 537 __func__, SeqNum, ts->rx_indicate_seq, WinSize); 538 539 spin_lock_irqsave(&(ieee->reorder_spinlock), flags); 540 541 WinEnd = (ts->rx_indicate_seq + WinSize - 1) % 4096; 542 /* Rx Reorder initialize condition.*/ 543 if (ts->rx_indicate_seq == 0xffff) 544 ts->rx_indicate_seq = SeqNum; 545 546 /* Drop out the packet which SeqNum is smaller than WinStart */ 547 if (SN_LESS(SeqNum, ts->rx_indicate_seq)) { 548 netdev_dbg(ieee->dev, 549 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n", 550 ts->rx_indicate_seq, SeqNum); 551 ht_info->rx_reorder_drop_counter++; 552 { 553 int i; 554 555 for (i = 0; i < prxb->nr_subframes; i++) 556 dev_kfree_skb(prxb->subframes[i]); 557 kfree(prxb); 558 prxb = NULL; 559 } 560 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 561 return; 562 } 563 564 /* Sliding window manipulation. Conditions includes: 565 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 566 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N 567 */ 568 if (SN_EQUAL(SeqNum, ts->rx_indicate_seq)) { 569 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) % 4096; 570 bMatchWinStart = true; 571 } else if (SN_LESS(WinEnd, SeqNum)) { 572 if (SeqNum >= (WinSize - 1)) 573 ts->rx_indicate_seq = SeqNum + 1 - WinSize; 574 else 575 ts->rx_indicate_seq = 4095 - 576 (WinSize - (SeqNum + 1)) + 1; 577 netdev_dbg(ieee->dev, 578 "Window Shift! IndicateSeq: %d, NewSeq: %d\n", 579 ts->rx_indicate_seq, SeqNum); 580 } 581 582 /* Indication process. 583 * After Packet dropping and Sliding Window shifting as above, we can 584 * now just indicate the packets with the SeqNum smaller than latest 585 * WinStart and struct buffer other packets. 586 * 587 * For Rx Reorder condition: 588 * 1. All packets with SeqNum smaller than WinStart => Indicate 589 * 2. All packets with SeqNum larger than or equal to 590 * WinStart => Buffer it. 591 */ 592 if (bMatchWinStart) { 593 /* Current packet is going to be indicated.*/ 594 netdev_dbg(ieee->dev, 595 "Packets indication! IndicateSeq: %d, NewSeq: %d\n", 596 ts->rx_indicate_seq, SeqNum); 597 ieee->prxbIndicateArray[0] = prxb; 598 index = 1; 599 } else { 600 /* Current packet is going to be inserted into pending list.*/ 601 if (!list_empty(&ieee->RxReorder_Unused_List)) { 602 pReorderEntry = (struct rx_reorder_entry *) 603 list_entry(ieee->RxReorder_Unused_List.next, 604 struct rx_reorder_entry, list); 605 list_del_init(&pReorderEntry->list); 606 607 /* Make a reorder entry and insert 608 * into a the packet list. 609 */ 610 pReorderEntry->SeqNum = SeqNum; 611 pReorderEntry->prxb = prxb; 612 613 if (!AddReorderEntry(ts, pReorderEntry)) { 614 int i; 615 616 netdev_dbg(ieee->dev, 617 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n", 618 __func__, ts->rx_indicate_seq, 619 SeqNum); 620 list_add_tail(&pReorderEntry->list, 621 &ieee->RxReorder_Unused_List); 622 623 for (i = 0; i < prxb->nr_subframes; i++) 624 dev_kfree_skb(prxb->subframes[i]); 625 kfree(prxb); 626 prxb = NULL; 627 } else { 628 netdev_dbg(ieee->dev, 629 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n", 630 ts->rx_indicate_seq, SeqNum); 631 } 632 } else { 633 /* Packets are dropped if there are not enough reorder 634 * entries. This part should be modified!! We can just 635 * indicate all the packets in struct buffer and get 636 * reorder entries. 637 */ 638 netdev_err(ieee->dev, 639 "%s(): There is no reorder entry! Packet is dropped!\n", 640 __func__); 641 { 642 int i; 643 644 for (i = 0; i < prxb->nr_subframes; i++) 645 dev_kfree_skb(prxb->subframes[i]); 646 kfree(prxb); 647 prxb = NULL; 648 } 649 } 650 } 651 652 /* Check if there is any packet need indicate.*/ 653 while (!list_empty(&ts->rx_pending_pkt_list)) { 654 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n", 655 __func__); 656 657 pReorderEntry = (struct rx_reorder_entry *) 658 list_entry(ts->rx_pending_pkt_list.prev, 659 struct rx_reorder_entry, 660 list); 661 if (SN_LESS(pReorderEntry->SeqNum, ts->rx_indicate_seq) || 662 SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq)) { 663 /* This protect struct buffer from overflow. */ 664 if (index >= REORDER_WIN_SIZE) { 665 netdev_err(ieee->dev, 666 "%s(): Buffer overflow!\n", 667 __func__); 668 bPktInBuf = true; 669 break; 670 } 671 672 list_del_init(&pReorderEntry->list); 673 674 if (SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq)) 675 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) % 676 4096; 677 678 ieee->prxbIndicateArray[index] = pReorderEntry->prxb; 679 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", 680 __func__, pReorderEntry->SeqNum); 681 index++; 682 683 list_add_tail(&pReorderEntry->list, 684 &ieee->RxReorder_Unused_List); 685 } else { 686 bPktInBuf = true; 687 break; 688 } 689 } 690 691 /* Handling pending timer. Set this timer to prevent from long time 692 * Rx buffering. 693 */ 694 if (index > 0) { 695 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags); 696 if (timer_pending(&ts->rx_pkt_pending_timer)) 697 del_timer_sync(&ts->rx_pkt_pending_timer); 698 spin_lock_irqsave(&ieee->reorder_spinlock, flags); 699 ts->rx_timeout_indicate_seq = 0xffff; 700 701 if (index > REORDER_WIN_SIZE) { 702 netdev_err(ieee->dev, 703 "%s(): Rx Reorder struct buffer full!\n", 704 __func__); 705 spin_unlock_irqrestore(&(ieee->reorder_spinlock), 706 flags); 707 return; 708 } 709 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index); 710 bPktInBuf = false; 711 } 712 713 if (bPktInBuf && ts->rx_timeout_indicate_seq == 0xffff) { 714 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__); 715 ts->rx_timeout_indicate_seq = ts->rx_indicate_seq; 716 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags); 717 mod_timer(&ts->rx_pkt_pending_timer, jiffies + 718 msecs_to_jiffies(ht_info->rx_reorder_pending_time)); 719 spin_lock_irqsave(&ieee->reorder_spinlock, flags); 720 } 721 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 722 } 723 724 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb, 725 struct rtllib_rx_stats *rx_stats, 726 struct rtllib_rxb *rxb, u8 *src, u8 *dst) 727 { 728 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data; 729 u16 fc = le16_to_cpu(hdr->frame_control); 730 731 u16 LLCOffset = sizeof(struct ieee80211_hdr_3addr); 732 u16 ChkLength; 733 bool is_aggregate_frame = false; 734 u16 nSubframe_Length; 735 u8 nPadding_Length = 0; 736 u16 SeqNum = 0; 737 struct sk_buff *sub_skb; 738 /* just for debug purpose */ 739 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctrl)); 740 if ((RTLLIB_QOS_HAS_SEQ(fc)) && 741 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) 742 is_aggregate_frame = true; 743 744 if (RTLLIB_QOS_HAS_SEQ(fc)) 745 LLCOffset += 2; 746 if (rx_stats->bContainHTC) 747 LLCOffset += sHTCLng; 748 749 ChkLength = LLCOffset; 750 751 if (skb->len <= ChkLength) 752 return 0; 753 754 skb_pull(skb, LLCOffset); 755 ieee->is_aggregate_frame = is_aggregate_frame; 756 if (!is_aggregate_frame) { 757 rxb->nr_subframes = 1; 758 759 /* altered by clark 3/30/2010 760 * The struct buffer size of the skb indicated to upper layer 761 * must be less than 5000, or the defraged IP datagram 762 * in the IP layer will exceed "ipfrag_high_tresh" and be 763 * discarded. so there must not use the function 764 * "skb_copy" and "skb_clone" for "skb". 765 */ 766 767 /* Allocate new skb for releasing to upper layer */ 768 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE); 769 if (!sub_skb) 770 return 0; 771 skb_reserve(sub_skb, 12); 772 skb_put_data(sub_skb, skb->data, skb->len); 773 sub_skb->dev = ieee->dev; 774 775 rxb->subframes[0] = sub_skb; 776 777 memcpy(rxb->src, src, ETH_ALEN); 778 memcpy(rxb->dst, dst, ETH_ALEN); 779 rxb->subframes[0]->dev = ieee->dev; 780 return 1; 781 } 782 783 rxb->nr_subframes = 0; 784 memcpy(rxb->src, src, ETH_ALEN); 785 memcpy(rxb->dst, dst, ETH_ALEN); 786 while (skb->len > ETHERNET_HEADER_SIZE) { 787 /* Offset 12 denote 2 mac address */ 788 nSubframe_Length = *((u16 *)(skb->data + 12)); 789 nSubframe_Length = (nSubframe_Length >> 8) + 790 (nSubframe_Length << 8); 791 792 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { 793 netdev_info(ieee->dev, 794 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", 795 __func__, rxb->nr_subframes); 796 netdev_info(ieee->dev, 797 "%s: A-MSDU parse error!! Subframe Length: %d\n", 798 __func__, nSubframe_Length); 799 netdev_info(ieee->dev, 800 "nRemain_Length is %d and nSubframe_Length is : %d\n", 801 skb->len, nSubframe_Length); 802 netdev_info(ieee->dev, 803 "The Packet SeqNum is %d\n", 804 SeqNum); 805 return 0; 806 } 807 808 /* move the data point to data content */ 809 skb_pull(skb, ETHERNET_HEADER_SIZE); 810 811 /* altered by clark 3/30/2010 812 * The struct buffer size of the skb indicated to upper layer 813 * must be less than 5000, or the defraged IP datagram 814 * in the IP layer will exceed "ipfrag_high_tresh" and be 815 * discarded. so there must not use the function 816 * "skb_copy" and "skb_clone" for "skb". 817 */ 818 819 /* Allocate new skb for releasing to upper layer */ 820 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 821 if (!sub_skb) 822 return 0; 823 skb_reserve(sub_skb, 12); 824 skb_put_data(sub_skb, skb->data, nSubframe_Length); 825 826 sub_skb->dev = ieee->dev; 827 rxb->subframes[rxb->nr_subframes++] = sub_skb; 828 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 829 netdev_dbg(ieee->dev, 830 "ParseSubframe(): Too many Subframes! Packets dropped!\n"); 831 break; 832 } 833 skb_pull(skb, nSubframe_Length); 834 835 if (skb->len != 0) { 836 nPadding_Length = 4 - ((nSubframe_Length + 837 ETHERNET_HEADER_SIZE) % 4); 838 if (nPadding_Length == 4) 839 nPadding_Length = 0; 840 841 if (skb->len < nPadding_Length) 842 return 0; 843 844 skb_pull(skb, nPadding_Length); 845 } 846 } 847 848 return rxb->nr_subframes; 849 } 850 851 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, 852 struct sk_buff *skb, 853 struct rtllib_rx_stats *rx_stats) 854 { 855 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 856 u16 fc = le16_to_cpu(hdr->frame_control); 857 size_t hdrlen; 858 859 hdrlen = rtllib_get_hdrlen(fc); 860 if (ht_c_check(ieee, skb->data)) { 861 if (net_ratelimit()) 862 netdev_info(ieee->dev, "%s: find HTCControl!\n", 863 __func__); 864 hdrlen += 4; 865 rx_stats->bContainHTC = true; 866 } 867 868 return hdrlen; 869 } 870 871 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee, 872 struct sk_buff *skb, u8 multicast) 873 { 874 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 875 u16 fc, sc; 876 u8 frag; 877 878 fc = le16_to_cpu(hdr->frame_control); 879 sc = le16_to_cpu(hdr->seq_ctrl); 880 frag = WLAN_GET_SEQ_FRAG(sc); 881 882 if (!ieee->ht_info->cur_rx_reorder_enable || 883 !ieee->current_network.qos_data.active || 884 !IsDataFrame(skb->data) || 885 IsLegacyDataFrame(skb->data)) { 886 if (!ieee80211_is_beacon(hdr->frame_control)) { 887 if (is_duplicate_packet(ieee, hdr)) 888 return -1; 889 } 890 } else { 891 struct rx_ts_record *ts = NULL; 892 893 if (rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2, 894 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) { 895 if ((fc & (1 << 11)) && (frag == ts->rx_last_frag_num) && 896 (WLAN_GET_SEQ_SEQ(sc) == ts->rx_last_seq_num)) 897 return -1; 898 ts->rx_last_frag_num = frag; 899 ts->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc); 900 } else { 901 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n", 902 __func__); 903 return -1; 904 } 905 } 906 907 return 0; 908 } 909 910 static void rtllib_rx_extract_addr(struct rtllib_device *ieee, 911 struct ieee80211_hdr *hdr, u8 *dst, 912 u8 *src, u8 *bssid) 913 { 914 u16 fc = le16_to_cpu(hdr->frame_control); 915 916 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { 917 case IEEE80211_FCTL_FROMDS: 918 ether_addr_copy(dst, hdr->addr1); 919 ether_addr_copy(src, hdr->addr3); 920 ether_addr_copy(bssid, hdr->addr2); 921 break; 922 case IEEE80211_FCTL_TODS: 923 ether_addr_copy(dst, hdr->addr3); 924 ether_addr_copy(src, hdr->addr2); 925 ether_addr_copy(bssid, hdr->addr1); 926 break; 927 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: 928 ether_addr_copy(dst, hdr->addr3); 929 ether_addr_copy(src, hdr->addr4); 930 ether_addr_copy(bssid, ieee->current_network.bssid); 931 break; 932 default: 933 ether_addr_copy(dst, hdr->addr1); 934 ether_addr_copy(src, hdr->addr2); 935 ether_addr_copy(bssid, hdr->addr3); 936 break; 937 } 938 } 939 940 static int rtllib_rx_data_filter(struct rtllib_device *ieee, struct ieee80211_hdr *hdr, 941 u8 *dst, u8 *src, u8 *bssid, u8 *addr2) 942 { 943 u16 fc = le16_to_cpu(hdr->frame_control); 944 u8 type = WLAN_FC_GET_TYPE(fc); 945 u8 stype = WLAN_FC_GET_STYPE(fc); 946 947 /* Filter frames from different BSS */ 948 if (ieee80211_has_a4(hdr->frame_control) && 949 !ether_addr_equal(ieee->current_network.bssid, bssid) && 950 !is_zero_ether_addr(ieee->current_network.bssid)) { 951 return -1; 952 } 953 954 /* Nullfunc frames may have PS-bit set, so they must be passed to 955 * hostap_handle_sta_rx() before being dropped here. 956 */ 957 if (stype != IEEE80211_STYPE_DATA && 958 stype != IEEE80211_STYPE_DATA_CFACK && 959 stype != IEEE80211_STYPE_DATA_CFPOLL && 960 stype != IEEE80211_STYPE_DATA_CFACKPOLL && 961 stype != IEEE80211_STYPE_QOS_DATA) { 962 if (stype != IEEE80211_STYPE_NULLFUNC) 963 netdev_dbg(ieee->dev, 964 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n", 965 type, stype); 966 return -1; 967 } 968 969 /* packets from our adapter are dropped (echo) */ 970 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN)) 971 return -1; 972 973 /* {broad,multi}cast packets to our BSS go through */ 974 if (is_multicast_ether_addr(dst)) { 975 if (memcmp(bssid, ieee->current_network.bssid, 976 ETH_ALEN)) 977 return -1; 978 } 979 return 0; 980 } 981 982 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb, 983 struct lib80211_crypt_data **crypt, size_t hdrlen) 984 { 985 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 986 u16 fc = le16_to_cpu(hdr->frame_control); 987 int idx = 0; 988 989 if (skb->len >= hdrlen + 3) 990 idx = skb->data[hdrlen + 3] >> 6; 991 992 *crypt = ieee->crypt_info.crypt[idx]; 993 /* allow NULL decrypt to indicate an station specific override 994 * for default encryption 995 */ 996 if (*crypt && (!(*crypt)->ops || !(*crypt)->ops->decrypt_mpdu)) 997 *crypt = NULL; 998 999 if (!*crypt && (fc & IEEE80211_FCTL_PROTECTED)) { 1000 /* This seems to be triggered by some (multicast?) 1001 * frames from other than current BSS, so just drop the 1002 * frames silently instead of filling system log with 1003 * these reports. 1004 */ 1005 netdev_dbg(ieee->dev, 1006 "Decryption failed (not set) (SA= %pM)\n", 1007 hdr->addr2); 1008 return -1; 1009 } 1010 1011 return 0; 1012 } 1013 1014 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 1015 struct rtllib_rx_stats *rx_stats, 1016 struct lib80211_crypt_data *crypt, size_t hdrlen) 1017 { 1018 struct ieee80211_hdr *hdr; 1019 int keyidx = 0; 1020 u16 fc, sc; 1021 u8 frag; 1022 1023 hdr = (struct ieee80211_hdr *)skb->data; 1024 fc = le16_to_cpu(hdr->frame_control); 1025 sc = le16_to_cpu(hdr->seq_ctrl); 1026 frag = WLAN_GET_SEQ_FRAG(sc); 1027 1028 if ((!rx_stats->Decrypted)) 1029 ieee->need_sw_enc = 1; 1030 else 1031 ieee->need_sw_enc = 0; 1032 1033 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt); 1034 if ((fc & IEEE80211_FCTL_PROTECTED) && (keyidx < 0)) { 1035 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__); 1036 return -1; 1037 } 1038 1039 hdr = (struct ieee80211_hdr *)skb->data; 1040 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1041 int flen; 1042 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); 1043 1044 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag); 1045 1046 if (!frag_skb) { 1047 netdev_dbg(ieee->dev, 1048 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n", 1049 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1050 WLAN_GET_SEQ_SEQ(sc), frag); 1051 return -1; 1052 } 1053 flen = skb->len; 1054 if (frag != 0) 1055 flen -= hdrlen; 1056 1057 if (frag_skb->tail + flen > frag_skb->end) { 1058 netdev_warn(ieee->dev, 1059 "%s: host decrypted and reassembled frame did not fit skb\n", 1060 __func__); 1061 rtllib_frag_cache_invalidate(ieee, hdr); 1062 return -1; 1063 } 1064 1065 if (frag == 0) { 1066 /* copy first fragment (including full headers) into 1067 * beginning of the fragment cache skb 1068 */ 1069 skb_put_data(frag_skb, skb->data, flen); 1070 } else { 1071 /* append frame payload to the end of the fragment 1072 * cache skb 1073 */ 1074 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1075 } 1076 dev_kfree_skb_any(skb); 1077 skb = NULL; 1078 1079 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1080 /* more fragments expected - leave the skb in fragment 1081 * cache for now; it will be delivered to upper layers 1082 * after all fragments have been received 1083 */ 1084 return -2; 1085 } 1086 1087 /* this was the last fragment and the frame will be 1088 * delivered, so remove skb from fragment cache 1089 */ 1090 skb = frag_skb; 1091 hdr = (struct ieee80211_hdr *)skb->data; 1092 rtllib_frag_cache_invalidate(ieee, hdr); 1093 } 1094 1095 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1096 * encrypted/authenticated 1097 */ 1098 if ((fc & IEEE80211_FCTL_PROTECTED) && 1099 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1100 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__); 1101 return -1; 1102 } 1103 1104 hdr = (struct ieee80211_hdr *)skb->data; 1105 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) { 1106 if (/*ieee->ieee802_1x &&*/ 1107 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1108 /* pass unencrypted EAPOL frames even if encryption is 1109 * configured 1110 */ 1111 struct eapol *eap = (struct eapol *)(skb->data + 1112 24); 1113 netdev_dbg(ieee->dev, 1114 "RX: IEEE 802.1X EAPOL frame: %s\n", 1115 eap_get_type(eap->type)); 1116 } else { 1117 netdev_dbg(ieee->dev, 1118 "encryption configured, but RX frame not encrypted (SA= %pM)\n", 1119 hdr->addr2); 1120 return -1; 1121 } 1122 } 1123 1124 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && 1125 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1126 struct eapol *eap = (struct eapol *)(skb->data + 24); 1127 1128 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n", 1129 eap_get_type(eap->type)); 1130 } 1131 1132 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep && 1133 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1134 netdev_dbg(ieee->dev, 1135 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n", 1136 hdr->addr2); 1137 return -1; 1138 } 1139 1140 return 0; 1141 } 1142 1143 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, 1144 u8 nr_subframes) 1145 { 1146 if (unicast) { 1147 if (ieee->link_state == MAC80211_LINKED) { 1148 if (((ieee->link_detect_info.num_rx_unicast_ok_in_period + 1149 ieee->link_detect_info.num_tx_ok_in_period) > 8) || 1150 (ieee->link_detect_info.num_rx_unicast_ok_in_period > 2)) { 1151 ieee->leisure_ps_leave(ieee->dev); 1152 } 1153 } 1154 } 1155 ieee->last_rx_ps_time = jiffies; 1156 } 1157 1158 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee, 1159 struct rtllib_rx_stats *rx_stats, 1160 struct rtllib_rxb *rxb, 1161 u8 *dst, 1162 u8 *src) 1163 { 1164 struct net_device *dev = ieee->dev; 1165 u16 ethertype; 1166 int i = 0; 1167 1168 if (!rxb) { 1169 netdev_info(dev, "%s: rxb is NULL!!\n", __func__); 1170 return; 1171 } 1172 1173 for (i = 0; i < rxb->nr_subframes; i++) { 1174 struct sk_buff *sub_skb = rxb->subframes[i]; 1175 1176 if (sub_skb) { 1177 /* convert hdr + possible LLC headers 1178 * into Ethernet header 1179 */ 1180 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 1181 if (sub_skb->len >= 8 && 1182 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && 1183 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 1184 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { 1185 /* remove RFC1042 or Bridge-Tunnel encapsulation 1186 * and replace EtherType 1187 */ 1188 skb_pull(sub_skb, SNAP_SIZE); 1189 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1190 src); 1191 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1192 dst); 1193 } else { 1194 u16 len; 1195 /* Leave Ethernet header part of hdr 1196 * and full payload 1197 */ 1198 len = sub_skb->len; 1199 memcpy(skb_push(sub_skb, 2), &len, 2); 1200 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1201 src); 1202 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1203 dst); 1204 } 1205 1206 ieee->stats.rx_packets++; 1207 ieee->stats.rx_bytes += sub_skb->len; 1208 1209 if (is_multicast_ether_addr(dst)) 1210 ieee->stats.multicast++; 1211 1212 /* Indicate the packets to upper layer */ 1213 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 1214 sub_skb->protocol = eth_type_trans(sub_skb, dev); 1215 sub_skb->dev = dev; 1216 sub_skb->dev->stats.rx_packets++; 1217 sub_skb->dev->stats.rx_bytes += sub_skb->len; 1218 /* 802.11 crc not sufficient */ 1219 sub_skb->ip_summed = CHECKSUM_NONE; 1220 netif_rx(sub_skb); 1221 } 1222 } 1223 kfree(rxb); 1224 } 1225 1226 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, 1227 struct rtllib_rx_stats *rx_stats) 1228 { 1229 struct net_device *dev = ieee->dev; 1230 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1231 struct lib80211_crypt_data *crypt = NULL; 1232 struct rtllib_rxb *rxb = NULL; 1233 struct rx_ts_record *ts = NULL; 1234 u16 fc, sc, SeqNum = 0; 1235 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0; 1236 u8 dst[ETH_ALEN]; 1237 u8 src[ETH_ALEN]; 1238 u8 bssid[ETH_ALEN] = {0}; 1239 1240 size_t hdrlen = 0; 1241 int ret = 0, i = 0; 1242 1243 fc = le16_to_cpu(hdr->frame_control); 1244 type = WLAN_FC_GET_TYPE(fc); 1245 stype = WLAN_FC_GET_STYPE(fc); 1246 sc = le16_to_cpu(hdr->seq_ctrl); 1247 1248 /*Filter pkt not to me*/ 1249 multicast = is_multicast_ether_addr(hdr->addr1); 1250 unicast = !multicast; 1251 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) 1252 goto rx_dropped; 1253 1254 /*Filter pkt has too small length */ 1255 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats); 1256 if (skb->len < hdrlen) { 1257 netdev_info(dev, 1258 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1259 __func__); 1260 goto rx_dropped; 1261 } 1262 1263 /* Filter Duplicate pkt */ 1264 ret = rtllib_rx_check_duplicate(ieee, skb, multicast); 1265 if (ret < 0) 1266 goto rx_dropped; 1267 1268 /* Filter CTRL Frame */ 1269 if (type == RTLLIB_FTYPE_CTL) 1270 goto rx_dropped; 1271 1272 /* Filter MGNT Frame */ 1273 if (type == RTLLIB_FTYPE_MGMT) { 1274 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1275 goto rx_dropped; 1276 else 1277 goto rx_exit; 1278 } 1279 1280 /* Filter WAPI DATA Frame */ 1281 1282 /* Update statstics for AP roaming */ 1283 ieee->link_detect_info.num_recv_data_in_period++; 1284 ieee->link_detect_info.num_rx_ok_in_period++; 1285 1286 /* Data frame - extract src/dst addresses */ 1287 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); 1288 1289 /* Filter Data frames */ 1290 ret = rtllib_rx_data_filter(ieee, hdr, dst, src, bssid, hdr->addr2); 1291 if (ret < 0) 1292 goto rx_dropped; 1293 1294 if (skb->len == hdrlen) 1295 goto rx_dropped; 1296 1297 /* Send pspoll based on moredata */ 1298 if ((ieee->iw_mode == IW_MODE_INFRA) && 1299 (ieee->sta_sleep == LPS_IS_SLEEP) && 1300 (ieee->polling)) { 1301 if (WLAN_FC_MORE_DATA(fc)) { 1302 /* more data bit is set, let's request a new frame 1303 * from the AP 1304 */ 1305 rtllib_sta_ps_send_pspoll_frame(ieee); 1306 } else { 1307 ieee->polling = false; 1308 } 1309 } 1310 1311 /* Get crypt if encrypted */ 1312 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen); 1313 if (ret == -1) 1314 goto rx_dropped; 1315 1316 /* Decrypt data frame (including reassemble) */ 1317 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen); 1318 if (ret == -1) 1319 goto rx_dropped; 1320 else if (ret == -2) 1321 goto rx_exit; 1322 1323 /* Get TS for Rx Reorder */ 1324 hdr = (struct ieee80211_hdr *)skb->data; 1325 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1326 && !is_multicast_ether_addr(hdr->addr1)) { 1327 TID = Frame_QoSTID(skb->data); 1328 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1329 rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2, TID, 1330 RX_DIR, true); 1331 if (TID != 0 && TID != 3) 1332 ieee->bis_any_nonbepkts = true; 1333 } 1334 1335 /* Parse rx data frame (For AMSDU) */ 1336 /* skb: hdr + (possible reassembled) full plaintext payload */ 1337 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC); 1338 if (!rxb) 1339 goto rx_dropped; 1340 1341 /* to parse amsdu packets */ 1342 /* qos data packets & reserved bit is 1 */ 1343 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { 1344 /* only to free rxb, and not submit the packets 1345 * to upper layer 1346 */ 1347 for (i = 0; i < rxb->nr_subframes; i++) 1348 dev_kfree_skb(rxb->subframes[i]); 1349 kfree(rxb); 1350 rxb = NULL; 1351 goto rx_dropped; 1352 } 1353 1354 /* Update WAPI PN */ 1355 1356 /* Check if leave LPS */ 1357 if (ieee->is_aggregate_frame) 1358 nr_subframes = rxb->nr_subframes; 1359 else 1360 nr_subframes = 1; 1361 if (unicast) 1362 ieee->link_detect_info.num_rx_unicast_ok_in_period += nr_subframes; 1363 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes); 1364 1365 /* Indicate packets to upper layer or Rx Reorder */ 1366 if (!ieee->ht_info->cur_rx_reorder_enable || !ts) 1367 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src); 1368 else 1369 RxReorderIndicatePacket(ieee, rxb, ts, SeqNum); 1370 1371 dev_kfree_skb(skb); 1372 1373 rx_exit: 1374 return 1; 1375 1376 rx_dropped: 1377 ieee->stats.rx_dropped++; 1378 1379 /* Returning 0 indicates to caller that we have not handled the SKB-- 1380 * so it is still allocated and can be used again by underlying 1381 * hardware as a DMA target 1382 */ 1383 return 0; 1384 } 1385 1386 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb, 1387 struct rtllib_rx_stats *rx_stats) 1388 { 1389 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1390 u16 fc = le16_to_cpu(hdr->frame_control); 1391 size_t hdrlen = rtllib_get_hdrlen(fc); 1392 1393 if (skb->len < hdrlen) { 1394 netdev_info(ieee->dev, 1395 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1396 __func__); 1397 return 0; 1398 } 1399 1400 if (ht_c_check(ieee, skb->data)) { 1401 if (net_ratelimit()) 1402 netdev_info(ieee->dev, "%s: Find HTCControl!\n", 1403 __func__); 1404 hdrlen += 4; 1405 } 1406 1407 ieee->stats.rx_packets++; 1408 ieee->stats.rx_bytes += skb->len; 1409 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen); 1410 1411 return 1; 1412 } 1413 1414 /* All received frames are sent to this function. @skb contains the frame in 1415 * IEEE 802.11 format, i.e., in the format it was sent over air. 1416 * This function is called only as a tasklet (software IRQ). 1417 */ 1418 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, 1419 struct rtllib_rx_stats *rx_stats) 1420 { 1421 int ret = 0; 1422 1423 if (!ieee || !skb || !rx_stats) { 1424 pr_info("%s: Input parameters NULL!\n", __func__); 1425 goto rx_dropped; 1426 } 1427 if (skb->len < 10) { 1428 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__); 1429 goto rx_dropped; 1430 } 1431 1432 switch (ieee->iw_mode) { 1433 case IW_MODE_INFRA: 1434 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats); 1435 break; 1436 case IW_MODE_MONITOR: 1437 ret = rtllib_rx_Monitor(ieee, skb, rx_stats); 1438 break; 1439 default: 1440 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__); 1441 break; 1442 } 1443 1444 return ret; 1445 1446 rx_dropped: 1447 if (ieee) 1448 ieee->stats.rx_dropped++; 1449 return 0; 1450 } 1451 EXPORT_SYMBOL(rtllib_rx); 1452 1453 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1454 1455 /* Make ther structure we read from the beacon packet has the right values */ 1456 static int rtllib_verify_qos_info(struct rtllib_qos_information_element 1457 *info_element, int sub_type) 1458 { 1459 if (info_element->elementID != QOS_ELEMENT_ID) 1460 return -1; 1461 if (info_element->qui_subtype != sub_type) 1462 return -1; 1463 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1464 return -1; 1465 if (info_element->qui_type != QOS_OUI_TYPE) 1466 return -1; 1467 if (info_element->version != QOS_VERSION_1) 1468 return -1; 1469 1470 return 0; 1471 } 1472 1473 /* Parse a QoS parameter element */ 1474 static int rtllib_read_qos_param_element( 1475 struct rtllib_qos_parameter_info *element_param, 1476 struct rtllib_info_element *info_element) 1477 { 1478 size_t size = sizeof(*element_param); 1479 1480 if (!element_param || !info_element || info_element->len != size - 2) 1481 return -1; 1482 1483 memcpy(element_param, info_element, size); 1484 return rtllib_verify_qos_info(&element_param->info_element, 1485 QOS_OUI_PARAM_SUB_TYPE); 1486 } 1487 1488 /* Parse a QoS information element */ 1489 static int rtllib_read_qos_info_element( 1490 struct rtllib_qos_information_element *element_info, 1491 struct rtllib_info_element *info_element) 1492 { 1493 size_t size = sizeof(*element_info); 1494 1495 if (!element_info || !info_element || info_element->len != size - 2) 1496 return -1; 1497 1498 memcpy(element_info, info_element, size); 1499 return rtllib_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE); 1500 } 1501 1502 /* Write QoS parameters from the ac parameters. */ 1503 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm, 1504 struct rtllib_qos_data *qos_data) 1505 { 1506 struct rtllib_qos_ac_parameter *ac_params; 1507 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters); 1508 int i; 1509 u8 aci; 1510 u8 acm; 1511 1512 qos_data->wmm_acm = 0; 1513 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1514 ac_params = &(param_elm->ac_params_record[i]); 1515 1516 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1517 acm = (ac_params->aci_aifsn & 0x10) >> 4; 1518 1519 if (aci >= QOS_QUEUE_NUM) 1520 continue; 1521 switch (aci) { 1522 case 1: 1523 /* BIT(0) | BIT(3) */ 1524 if (acm) 1525 qos_data->wmm_acm |= (0x01 << 0) | (0x01 << 3); 1526 break; 1527 case 2: 1528 /* BIT(4) | BIT(5) */ 1529 if (acm) 1530 qos_data->wmm_acm |= (0x01 << 4) | (0x01 << 5); 1531 break; 1532 case 3: 1533 /* BIT(6) | BIT(7) */ 1534 if (acm) 1535 qos_data->wmm_acm |= (0x01 << 6) | (0x01 << 7); 1536 break; 1537 case 0: 1538 default: 1539 /* BIT(1) | BIT(2) */ 1540 if (acm) 1541 qos_data->wmm_acm |= (0x01 << 1) | (0x01 << 2); 1542 break; 1543 } 1544 1545 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1546 1547 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1548 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2); 1549 1550 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 1551 0x0F); 1552 1553 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 1554 0xF0) >> 4); 1555 1556 qos_param->flag[aci] = 1557 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1558 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1559 } 1560 return 0; 1561 } 1562 1563 /* we have a generic data element which it may contain QoS information or 1564 * parameters element. check the information element length to decide 1565 * which type to read 1566 */ 1567 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee, 1568 struct rtllib_info_element 1569 *info_element, 1570 struct rtllib_network *network) 1571 { 1572 int rc = 0; 1573 struct rtllib_qos_information_element qos_info_element; 1574 1575 rc = rtllib_read_qos_info_element(&qos_info_element, info_element); 1576 1577 if (rc == 0) { 1578 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1579 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1580 } else { 1581 struct rtllib_qos_parameter_info param_element; 1582 1583 rc = rtllib_read_qos_param_element(¶m_element, 1584 info_element); 1585 if (rc == 0) { 1586 rtllib_qos_convert_ac_to_parameters(¶m_element, 1587 &(network->qos_data)); 1588 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1589 network->qos_data.param_count = 1590 param_element.info_element.ac_info & 0x0F; 1591 } 1592 } 1593 1594 if (rc == 0) { 1595 netdev_dbg(ieee->dev, "QoS is supported\n"); 1596 network->qos_data.supported = 1; 1597 } 1598 return rc; 1599 } 1600 1601 static const char *get_info_element_string(u16 id) 1602 { 1603 switch (id) { 1604 case MFIE_TYPE_SSID: 1605 return "SSID"; 1606 case MFIE_TYPE_RATES: 1607 return "RATES"; 1608 case MFIE_TYPE_FH_SET: 1609 return "FH_SET"; 1610 case MFIE_TYPE_DS_SET: 1611 return "DS_SET"; 1612 case MFIE_TYPE_CF_SET: 1613 return "CF_SET"; 1614 case MFIE_TYPE_TIM: 1615 return "TIM"; 1616 case MFIE_TYPE_IBSS_SET: 1617 return "IBSS_SET"; 1618 case MFIE_TYPE_COUNTRY: 1619 return "COUNTRY"; 1620 case MFIE_TYPE_HOP_PARAMS: 1621 return "HOP_PARAMS"; 1622 case MFIE_TYPE_HOP_TABLE: 1623 return "HOP_TABLE"; 1624 case MFIE_TYPE_REQUEST: 1625 return "REQUEST"; 1626 case MFIE_TYPE_CHALLENGE: 1627 return "CHALLENGE"; 1628 case MFIE_TYPE_POWER_CONSTRAINT: 1629 return "POWER_CONSTRAINT"; 1630 case MFIE_TYPE_POWER_CAPABILITY: 1631 return "POWER_CAPABILITY"; 1632 case MFIE_TYPE_TPC_REQUEST: 1633 return "TPC_REQUEST"; 1634 case MFIE_TYPE_TPC_REPORT: 1635 return "TPC_REPORT"; 1636 case MFIE_TYPE_SUPP_CHANNELS: 1637 return "SUPP_CHANNELS"; 1638 case MFIE_TYPE_CSA: 1639 return "CSA"; 1640 case MFIE_TYPE_MEASURE_REQUEST: 1641 return "MEASURE_REQUEST"; 1642 case MFIE_TYPE_MEASURE_REPORT: 1643 return "MEASURE_REPORT"; 1644 case MFIE_TYPE_QUIET: 1645 return "QUIET"; 1646 case MFIE_TYPE_IBSS_DFS: 1647 return "IBSS_DFS"; 1648 case MFIE_TYPE_RSN: 1649 return "RSN"; 1650 case MFIE_TYPE_RATES_EX: 1651 return "RATES_EX"; 1652 case MFIE_TYPE_GENERIC: 1653 return "GENERIC"; 1654 case MFIE_TYPE_QOS_PARAMETER: 1655 return "QOS_PARAMETER"; 1656 default: 1657 return "UNKNOWN"; 1658 } 1659 } 1660 1661 static void rtllib_parse_mife_generic(struct rtllib_device *ieee, 1662 struct rtllib_info_element *info_element, 1663 struct rtllib_network *network, 1664 u16 *tmp_htcap_len, 1665 u16 *tmp_htinfo_len) 1666 { 1667 u16 ht_realtek_agg_len = 0; 1668 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1669 1670 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network)) 1671 return; 1672 if (info_element->len >= 4 && 1673 info_element->data[0] == 0x00 && 1674 info_element->data[1] == 0x50 && 1675 info_element->data[2] == 0xf2 && 1676 info_element->data[3] == 0x01) { 1677 network->wpa_ie_len = min(info_element->len + 2, 1678 MAX_WPA_IE_LEN); 1679 memcpy(network->wpa_ie, info_element, network->wpa_ie_len); 1680 return; 1681 } 1682 if (info_element->len == 7 && 1683 info_element->data[0] == 0x00 && 1684 info_element->data[1] == 0xe0 && 1685 info_element->data[2] == 0x4c && 1686 info_element->data[3] == 0x01 && 1687 info_element->data[4] == 0x02) 1688 network->turbo_enable = 1; 1689 1690 if (*tmp_htcap_len == 0) { 1691 if (info_element->len >= 4 && 1692 info_element->data[0] == 0x00 && 1693 info_element->data[1] == 0x90 && 1694 info_element->data[2] == 0x4c && 1695 info_element->data[3] == 0x033) { 1696 *tmp_htcap_len = min_t(u8, info_element->len, 1697 MAX_IE_LEN); 1698 if (*tmp_htcap_len != 0) { 1699 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC; 1700 network->bssht.bd_ht_cap_len = min_t(u16, *tmp_htcap_len, 1701 sizeof(network->bssht.bd_ht_cap_buf)); 1702 memcpy(network->bssht.bd_ht_cap_buf, 1703 info_element->data, 1704 network->bssht.bd_ht_cap_len); 1705 } 1706 } 1707 if (*tmp_htcap_len != 0) { 1708 network->bssht.bd_support_ht = true; 1709 network->bssht.bd_ht_1r = ((((struct ht_capab_ele *)(network->bssht.bd_ht_cap_buf))->MCS[1]) == 0); 1710 } else { 1711 network->bssht.bd_support_ht = false; 1712 network->bssht.bd_ht_1r = false; 1713 } 1714 } 1715 1716 if (*tmp_htinfo_len == 0) { 1717 if (info_element->len >= 4 && 1718 info_element->data[0] == 0x00 && 1719 info_element->data[1] == 0x90 && 1720 info_element->data[2] == 0x4c && 1721 info_element->data[3] == 0x034) { 1722 *tmp_htinfo_len = min_t(u8, info_element->len, 1723 MAX_IE_LEN); 1724 if (*tmp_htinfo_len != 0) { 1725 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC; 1726 network->bssht.bd_ht_info_len = min_t(u16, *tmp_htinfo_len, 1727 sizeof(network->bssht.bd_ht_info_buf)); 1728 memcpy(network->bssht.bd_ht_info_buf, 1729 info_element->data, 1730 network->bssht.bd_ht_info_len); 1731 } 1732 } 1733 } 1734 1735 if (network->bssht.bd_support_ht) { 1736 if (info_element->len >= 4 && 1737 info_element->data[0] == 0x00 && 1738 info_element->data[1] == 0xe0 && 1739 info_element->data[2] == 0x4c && 1740 info_element->data[3] == 0x02) { 1741 ht_realtek_agg_len = min_t(u8, info_element->len, 1742 MAX_IE_LEN); 1743 memcpy(ht_realtek_agg_buf, info_element->data, 1744 info_element->len); 1745 } 1746 if (ht_realtek_agg_len >= 5) { 1747 network->realtek_cap_exit = true; 1748 network->bssht.bd_rt2rt_aggregation = true; 1749 1750 if ((ht_realtek_agg_buf[4] == 1) && 1751 (ht_realtek_agg_buf[5] & 0x02)) 1752 network->bssht.bd_rt2rt_long_slot_time = true; 1753 1754 if ((ht_realtek_agg_buf[4] == 1) && 1755 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE)) 1756 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_92SE; 1757 } 1758 } 1759 if (ht_realtek_agg_len >= 5) { 1760 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP)) 1761 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_SOFTAP; 1762 } 1763 1764 if ((info_element->len >= 3 && 1765 info_element->data[0] == 0x00 && 1766 info_element->data[1] == 0x05 && 1767 info_element->data[2] == 0xb5) || 1768 (info_element->len >= 3 && 1769 info_element->data[0] == 0x00 && 1770 info_element->data[1] == 0x0a && 1771 info_element->data[2] == 0xf7) || 1772 (info_element->len >= 3 && 1773 info_element->data[0] == 0x00 && 1774 info_element->data[1] == 0x10 && 1775 info_element->data[2] == 0x18)) { 1776 network->broadcom_cap_exist = true; 1777 } 1778 if (info_element->len >= 3 && 1779 info_element->data[0] == 0x00 && 1780 info_element->data[1] == 0x0c && 1781 info_element->data[2] == 0x43) 1782 network->ralink_cap_exist = true; 1783 if ((info_element->len >= 3 && 1784 info_element->data[0] == 0x00 && 1785 info_element->data[1] == 0x03 && 1786 info_element->data[2] == 0x7f) || 1787 (info_element->len >= 3 && 1788 info_element->data[0] == 0x00 && 1789 info_element->data[1] == 0x13 && 1790 info_element->data[2] == 0x74)) 1791 network->atheros_cap_exist = true; 1792 1793 if ((info_element->len >= 3 && 1794 info_element->data[0] == 0x00 && 1795 info_element->data[1] == 0x50 && 1796 info_element->data[2] == 0x43)) 1797 network->marvell_cap_exist = true; 1798 if (info_element->len >= 3 && 1799 info_element->data[0] == 0x00 && 1800 info_element->data[1] == 0x40 && 1801 info_element->data[2] == 0x96) 1802 network->cisco_cap_exist = true; 1803 1804 if (info_element->len >= 3 && 1805 info_element->data[0] == 0x00 && 1806 info_element->data[1] == 0x0a && 1807 info_element->data[2] == 0xf5) 1808 network->airgo_cap_exist = true; 1809 1810 if (info_element->len > 4 && 1811 info_element->data[0] == 0x00 && 1812 info_element->data[1] == 0x40 && 1813 info_element->data[2] == 0x96 && 1814 info_element->data[3] == 0x01) { 1815 if (info_element->len == 6) { 1816 memcpy(network->CcxRmState, &info_element->data[4], 2); 1817 if (network->CcxRmState[0] != 0) 1818 network->ccx_rm_enable = true; 1819 else 1820 network->ccx_rm_enable = false; 1821 network->MBssidMask = network->CcxRmState[1] & 0x07; 1822 if (network->MBssidMask != 0) { 1823 network->bMBssidValid = true; 1824 network->MBssidMask = 0xff << 1825 (network->MBssidMask); 1826 ether_addr_copy(network->MBssid, 1827 network->bssid); 1828 network->MBssid[5] &= network->MBssidMask; 1829 } else { 1830 network->bMBssidValid = false; 1831 } 1832 } else { 1833 network->ccx_rm_enable = false; 1834 } 1835 } 1836 if (info_element->len > 4 && 1837 info_element->data[0] == 0x00 && 1838 info_element->data[1] == 0x40 && 1839 info_element->data[2] == 0x96 && 1840 info_element->data[3] == 0x03) { 1841 if (info_element->len == 5) { 1842 network->bWithCcxVerNum = true; 1843 network->bss_ccx_ver_number = info_element->data[4]; 1844 } else { 1845 network->bWithCcxVerNum = false; 1846 network->bss_ccx_ver_number = 0; 1847 } 1848 } 1849 if (info_element->len > 4 && 1850 info_element->data[0] == 0x00 && 1851 info_element->data[1] == 0x50 && 1852 info_element->data[2] == 0xf2 && 1853 info_element->data[3] == 0x04) { 1854 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n", 1855 info_element->len); 1856 network->wzc_ie_len = min(info_element->len + 2, MAX_WZC_IE_LEN); 1857 memcpy(network->wzc_ie, info_element, network->wzc_ie_len); 1858 } 1859 } 1860 1861 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element, 1862 struct rtllib_network *network, 1863 u16 *tmp_htcap_len) 1864 { 1865 struct bss_ht *ht = &network->bssht; 1866 1867 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN); 1868 if (*tmp_htcap_len != 0) { 1869 ht->bd_ht_spec_ver = HT_SPEC_VER_EWC; 1870 ht->bd_ht_cap_len = min_t(u16, *tmp_htcap_len, 1871 sizeof(ht->bd_ht_cap_buf)); 1872 memcpy(ht->bd_ht_cap_buf, info_element->data, ht->bd_ht_cap_len); 1873 1874 ht->bd_support_ht = true; 1875 ht->bd_ht_1r = ((((struct ht_capab_ele *) 1876 ht->bd_ht_cap_buf))->MCS[1]) == 0; 1877 1878 ht->bd_bandwidth = (enum ht_channel_width) 1879 (((struct ht_capab_ele *) 1880 (ht->bd_ht_cap_buf))->ChlWidth); 1881 } else { 1882 ht->bd_support_ht = false; 1883 ht->bd_ht_1r = false; 1884 ht->bd_bandwidth = HT_CHANNEL_WIDTH_20; 1885 } 1886 } 1887 1888 int rtllib_parse_info_param(struct rtllib_device *ieee, 1889 struct rtllib_info_element *info_element, 1890 u16 length, 1891 struct rtllib_network *network, 1892 struct rtllib_rx_stats *stats) 1893 { 1894 u8 i; 1895 short offset; 1896 u16 tmp_htcap_len = 0; 1897 u16 tmp_htinfo_len = 0; 1898 char rates_str[64]; 1899 char *p; 1900 1901 while (length >= sizeof(*info_element)) { 1902 if (sizeof(*info_element) + info_element->len > length) { 1903 netdev_dbg(ieee->dev, 1904 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n", 1905 info_element->len + sizeof(*info_element), 1906 length, info_element->id); 1907 /* We stop processing but don't return an error here 1908 * because some misbehaviour APs break this rule. ie. 1909 * Orinoco AP1000. 1910 */ 1911 break; 1912 } 1913 1914 switch (info_element->id) { 1915 case MFIE_TYPE_SSID: 1916 if (rtllib_is_empty_essid(info_element->data, 1917 info_element->len)) { 1918 network->flags |= NETWORK_EMPTY_ESSID; 1919 break; 1920 } 1921 1922 network->ssid_len = min(info_element->len, 1923 (u8)IW_ESSID_MAX_SIZE); 1924 memcpy(network->ssid, info_element->data, 1925 network->ssid_len); 1926 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1927 memset(network->ssid + network->ssid_len, 0, 1928 IW_ESSID_MAX_SIZE - network->ssid_len); 1929 1930 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n", 1931 network->ssid, network->ssid_len); 1932 break; 1933 1934 case MFIE_TYPE_RATES: 1935 p = rates_str; 1936 network->rates_len = min(info_element->len, 1937 MAX_RATES_LENGTH); 1938 for (i = 0; i < network->rates_len; i++) { 1939 network->rates[i] = info_element->data[i]; 1940 p += scnprintf(p, sizeof(rates_str) - 1941 (p - rates_str), "%02X ", 1942 network->rates[i]); 1943 if (rtllib_is_ofdm_rate 1944 (info_element->data[i])) { 1945 network->flags |= NETWORK_HAS_OFDM; 1946 if (info_element->data[i] & 1947 RTLLIB_BASIC_RATE_MASK) 1948 network->flags &= 1949 ~NETWORK_HAS_CCK; 1950 } 1951 1952 if (rtllib_is_cck_rate 1953 (info_element->data[i])) { 1954 network->flags |= NETWORK_HAS_CCK; 1955 } 1956 } 1957 1958 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n", 1959 rates_str, network->rates_len); 1960 break; 1961 1962 case MFIE_TYPE_RATES_EX: 1963 p = rates_str; 1964 network->rates_ex_len = min(info_element->len, 1965 MAX_RATES_EX_LENGTH); 1966 for (i = 0; i < network->rates_ex_len; i++) { 1967 network->rates_ex[i] = info_element->data[i]; 1968 p += scnprintf(p, sizeof(rates_str) - 1969 (p - rates_str), "%02X ", 1970 network->rates_ex[i]); 1971 if (rtllib_is_ofdm_rate 1972 (info_element->data[i])) { 1973 network->flags |= NETWORK_HAS_OFDM; 1974 if (info_element->data[i] & 1975 RTLLIB_BASIC_RATE_MASK) 1976 network->flags &= 1977 ~NETWORK_HAS_CCK; 1978 } 1979 } 1980 1981 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1982 rates_str, network->rates_ex_len); 1983 break; 1984 1985 case MFIE_TYPE_DS_SET: 1986 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n", 1987 info_element->data[0]); 1988 network->channel = info_element->data[0]; 1989 break; 1990 1991 case MFIE_TYPE_FH_SET: 1992 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n"); 1993 break; 1994 1995 case MFIE_TYPE_CF_SET: 1996 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n"); 1997 break; 1998 1999 case MFIE_TYPE_TIM: 2000 if (info_element->len < 4) 2001 break; 2002 2003 network->tim.tim_count = info_element->data[0]; 2004 network->tim.tim_period = info_element->data[1]; 2005 2006 network->dtim_period = info_element->data[1]; 2007 if (ieee->link_state != MAC80211_LINKED) 2008 break; 2009 network->last_dtim_sta_time = jiffies; 2010 2011 network->dtim_data = RTLLIB_DTIM_VALID; 2012 2013 if (info_element->data[2] & 1) 2014 network->dtim_data |= RTLLIB_DTIM_MBCAST; 2015 2016 offset = (info_element->data[2] >> 1) * 2; 2017 2018 if (ieee->assoc_id < 8 * offset || 2019 ieee->assoc_id > 8 * (offset + info_element->len - 3)) 2020 break; 2021 2022 offset = (ieee->assoc_id / 8) - offset; 2023 if (info_element->data[3 + offset] & 2024 (1 << (ieee->assoc_id % 8))) 2025 network->dtim_data |= RTLLIB_DTIM_UCAST; 2026 2027 network->listen_interval = network->dtim_period; 2028 break; 2029 2030 case MFIE_TYPE_ERP: 2031 network->erp_value = info_element->data[0]; 2032 network->flags |= NETWORK_HAS_ERP_VALUE; 2033 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n", 2034 network->erp_value); 2035 break; 2036 case MFIE_TYPE_IBSS_SET: 2037 network->atim_window = info_element->data[0]; 2038 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n", 2039 network->atim_window); 2040 break; 2041 2042 case MFIE_TYPE_CHALLENGE: 2043 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n"); 2044 break; 2045 2046 case MFIE_TYPE_GENERIC: 2047 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n", 2048 info_element->len); 2049 2050 rtllib_parse_mife_generic(ieee, info_element, network, 2051 &tmp_htcap_len, 2052 &tmp_htinfo_len); 2053 break; 2054 2055 case MFIE_TYPE_RSN: 2056 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n", 2057 info_element->len); 2058 network->rsn_ie_len = min(info_element->len + 2, 2059 MAX_WPA_IE_LEN); 2060 memcpy(network->rsn_ie, info_element, 2061 network->rsn_ie_len); 2062 break; 2063 2064 case MFIE_TYPE_HT_CAP: 2065 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n", 2066 info_element->len); 2067 2068 rtllib_parse_mfie_ht_cap(info_element, network, 2069 &tmp_htcap_len); 2070 break; 2071 2072 case MFIE_TYPE_HT_INFO: 2073 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n", 2074 info_element->len); 2075 tmp_htinfo_len = min_t(u8, info_element->len, 2076 MAX_IE_LEN); 2077 if (tmp_htinfo_len) { 2078 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_IEEE; 2079 network->bssht.bd_ht_info_len = tmp_htinfo_len > 2080 sizeof(network->bssht.bd_ht_info_buf) ? 2081 sizeof(network->bssht.bd_ht_info_buf) : 2082 tmp_htinfo_len; 2083 memcpy(network->bssht.bd_ht_info_buf, 2084 info_element->data, 2085 network->bssht.bd_ht_info_len); 2086 } 2087 break; 2088 2089 case MFIE_TYPE_AIRONET: 2090 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n", 2091 info_element->len); 2092 if (info_element->len > IE_CISCO_FLAG_POSITION) { 2093 network->bWithAironetIE = true; 2094 2095 if ((info_element->data[IE_CISCO_FLAG_POSITION] 2096 & SUPPORT_CKIP_MIC) || 2097 (info_element->data[IE_CISCO_FLAG_POSITION] 2098 & SUPPORT_CKIP_PK)) 2099 network->ckip_supported = true; 2100 else 2101 network->ckip_supported = false; 2102 } else { 2103 network->bWithAironetIE = false; 2104 network->ckip_supported = false; 2105 } 2106 break; 2107 case MFIE_TYPE_QOS_PARAMETER: 2108 netdev_err(ieee->dev, 2109 "QoS Error need to parse QOS_PARAMETER IE\n"); 2110 break; 2111 2112 case MFIE_TYPE_COUNTRY: 2113 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n", 2114 info_element->len); 2115 break; 2116 /* TODO */ 2117 default: 2118 netdev_dbg(ieee->dev, 2119 "Unsupported info element: %s (%d)\n", 2120 get_info_element_string(info_element->id), 2121 info_element->id); 2122 break; 2123 } 2124 2125 length -= sizeof(*info_element) + info_element->len; 2126 info_element = 2127 (struct rtllib_info_element *)&info_element->data[info_element->len]; 2128 } 2129 2130 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 2131 !network->cisco_cap_exist && !network->ralink_cap_exist && 2132 !network->bssht.bd_rt2rt_aggregation) 2133 network->unknown_cap_exist = true; 2134 else 2135 network->unknown_cap_exist = false; 2136 return 0; 2137 } 2138 2139 static long rtllib_translate_todbm(u8 signal_strength_index) 2140 { 2141 long signal_power; 2142 2143 signal_power = (long)((signal_strength_index + 1) >> 1); 2144 signal_power -= 95; 2145 2146 return signal_power; 2147 } 2148 2149 static inline int rtllib_network_init( 2150 struct rtllib_device *ieee, 2151 struct rtllib_probe_response *beacon, 2152 struct rtllib_network *network, 2153 struct rtllib_rx_stats *stats) 2154 { 2155 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data)); 2156 2157 /* Pull out fixed field data */ 2158 ether_addr_copy(network->bssid, beacon->header.addr3); 2159 network->capability = le16_to_cpu(beacon->capability); 2160 network->last_scanned = jiffies; 2161 network->time_stamp[0] = beacon->time_stamp[0]; 2162 network->time_stamp[1] = beacon->time_stamp[1]; 2163 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 2164 /* Where to pull this? beacon->listen_interval;*/ 2165 network->listen_interval = 0x0A; 2166 network->rates_len = network->rates_ex_len = 0; 2167 network->ssid_len = 0; 2168 network->hidden_ssid_len = 0; 2169 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid)); 2170 network->flags = 0; 2171 network->atim_window = 0; 2172 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2173 0x3 : 0x0; 2174 network->berp_info_valid = false; 2175 network->broadcom_cap_exist = false; 2176 network->ralink_cap_exist = false; 2177 network->atheros_cap_exist = false; 2178 network->cisco_cap_exist = false; 2179 network->unknown_cap_exist = false; 2180 network->realtek_cap_exit = false; 2181 network->marvell_cap_exist = false; 2182 network->airgo_cap_exist = false; 2183 network->turbo_enable = 0; 2184 network->SignalStrength = stats->SignalStrength; 2185 network->RSSI = stats->SignalStrength; 2186 network->CountryIeLen = 0; 2187 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2188 ht_initialize_bss_desc(&network->bssht); 2189 network->flags |= NETWORK_HAS_CCK; 2190 2191 network->wpa_ie_len = 0; 2192 network->rsn_ie_len = 0; 2193 network->wzc_ie_len = 0; 2194 2195 if (rtllib_parse_info_param(ieee, 2196 beacon->info_element, 2197 (stats->len - sizeof(*beacon)), 2198 network, 2199 stats)) 2200 return 1; 2201 2202 network->mode = 0; 2203 2204 if (network->flags & NETWORK_HAS_OFDM) 2205 network->mode |= WIRELESS_MODE_G; 2206 if (network->flags & NETWORK_HAS_CCK) 2207 network->mode |= WIRELESS_MODE_B; 2208 2209 if (network->mode == 0) { 2210 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n", 2211 escape_essid(network->ssid, network->ssid_len), 2212 network->bssid); 2213 return 1; 2214 } 2215 2216 if (network->bssht.bd_support_ht) { 2217 if (network->mode & (WIRELESS_MODE_G | WIRELESS_MODE_B)) 2218 network->mode = WIRELESS_MODE_N_24G; 2219 } 2220 if (rtllib_is_empty_essid(network->ssid, network->ssid_len)) 2221 network->flags |= NETWORK_EMPTY_ESSID; 2222 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2223 stats->noise = rtllib_translate_todbm((u8)(100 - stats->signal)) - 25; 2224 2225 memcpy(&network->stats, stats, sizeof(network->stats)); 2226 2227 return 0; 2228 } 2229 2230 static inline int is_same_network(struct rtllib_network *src, 2231 struct rtllib_network *dst, u8 ssidbroad) 2232 { 2233 /* A network is only a duplicate if the channel, BSSID, ESSID 2234 * and the capability field (in particular IBSS and BSS) all match. 2235 * We treat all <hidden> with the same BSSID and channel 2236 * as one network 2237 */ 2238 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) && 2239 (src->channel == dst->channel) && 2240 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2241 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || 2242 (!ssidbroad)) && 2243 ((src->capability & WLAN_CAPABILITY_IBSS) == 2244 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2245 ((src->capability & WLAN_CAPABILITY_ESS) == 2246 (dst->capability & WLAN_CAPABILITY_ESS))); 2247 } 2248 2249 static inline void update_network(struct rtllib_device *ieee, 2250 struct rtllib_network *dst, 2251 struct rtllib_network *src) 2252 { 2253 int qos_active; 2254 u8 old_param; 2255 2256 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); 2257 dst->capability = src->capability; 2258 memcpy(dst->rates, src->rates, src->rates_len); 2259 dst->rates_len = src->rates_len; 2260 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2261 dst->rates_ex_len = src->rates_ex_len; 2262 if (src->ssid_len > 0) { 2263 if (dst->ssid_len == 0) { 2264 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid)); 2265 dst->hidden_ssid_len = src->ssid_len; 2266 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len); 2267 } else { 2268 memset(dst->ssid, 0, dst->ssid_len); 2269 dst->ssid_len = src->ssid_len; 2270 memcpy(dst->ssid, src->ssid, src->ssid_len); 2271 } 2272 } 2273 dst->mode = src->mode; 2274 dst->flags = src->flags; 2275 dst->time_stamp[0] = src->time_stamp[0]; 2276 dst->time_stamp[1] = src->time_stamp[1]; 2277 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2278 dst->erp_value = src->erp_value; 2279 dst->berp_info_valid = src->berp_info_valid = true; 2280 } 2281 dst->beacon_interval = src->beacon_interval; 2282 dst->listen_interval = src->listen_interval; 2283 dst->atim_window = src->atim_window; 2284 dst->dtim_period = src->dtim_period; 2285 dst->dtim_data = src->dtim_data; 2286 dst->last_dtim_sta_time = src->last_dtim_sta_time; 2287 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters)); 2288 2289 dst->bssht.bd_support_ht = src->bssht.bd_support_ht; 2290 dst->bssht.bd_rt2rt_aggregation = src->bssht.bd_rt2rt_aggregation; 2291 dst->bssht.bd_ht_cap_len = src->bssht.bd_ht_cap_len; 2292 memcpy(dst->bssht.bd_ht_cap_buf, src->bssht.bd_ht_cap_buf, 2293 src->bssht.bd_ht_cap_len); 2294 dst->bssht.bd_ht_info_len = src->bssht.bd_ht_info_len; 2295 memcpy(dst->bssht.bd_ht_info_buf, src->bssht.bd_ht_info_buf, 2296 src->bssht.bd_ht_info_len); 2297 dst->bssht.bd_ht_spec_ver = src->bssht.bd_ht_spec_ver; 2298 dst->bssht.bd_rt2rt_long_slot_time = src->bssht.bd_rt2rt_long_slot_time; 2299 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2300 dst->ralink_cap_exist = src->ralink_cap_exist; 2301 dst->atheros_cap_exist = src->atheros_cap_exist; 2302 dst->realtek_cap_exit = src->realtek_cap_exit; 2303 dst->marvell_cap_exist = src->marvell_cap_exist; 2304 dst->cisco_cap_exist = src->cisco_cap_exist; 2305 dst->airgo_cap_exist = src->airgo_cap_exist; 2306 dst->unknown_cap_exist = src->unknown_cap_exist; 2307 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2308 dst->wpa_ie_len = src->wpa_ie_len; 2309 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2310 dst->rsn_ie_len = src->rsn_ie_len; 2311 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len); 2312 dst->wzc_ie_len = src->wzc_ie_len; 2313 2314 dst->last_scanned = jiffies; 2315 /* qos related parameters */ 2316 qos_active = dst->qos_data.active; 2317 old_param = dst->qos_data.param_count; 2318 dst->qos_data.supported = src->qos_data.supported; 2319 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS) 2320 memcpy(&dst->qos_data, &src->qos_data, 2321 sizeof(struct rtllib_qos_data)); 2322 if (dst->qos_data.supported == 1) { 2323 if (dst->ssid_len) 2324 netdev_dbg(ieee->dev, 2325 "QoS the network %s is QoS supported\n", 2326 dst->ssid); 2327 else 2328 netdev_dbg(ieee->dev, 2329 "QoS the network is QoS supported\n"); 2330 } 2331 dst->qos_data.active = qos_active; 2332 dst->qos_data.old_param_count = old_param; 2333 2334 dst->wmm_info = src->wmm_info; 2335 if (src->wmm_param[0].ac_aci_acm_aifsn || 2336 src->wmm_param[1].ac_aci_acm_aifsn || 2337 src->wmm_param[2].ac_aci_acm_aifsn || 2338 src->wmm_param[3].ac_aci_acm_aifsn) 2339 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2340 2341 dst->SignalStrength = src->SignalStrength; 2342 dst->RSSI = src->RSSI; 2343 dst->turbo_enable = src->turbo_enable; 2344 2345 dst->CountryIeLen = src->CountryIeLen; 2346 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2347 2348 dst->bWithAironetIE = src->bWithAironetIE; 2349 dst->ckip_supported = src->ckip_supported; 2350 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2351 dst->ccx_rm_enable = src->ccx_rm_enable; 2352 dst->MBssidMask = src->MBssidMask; 2353 dst->bMBssidValid = src->bMBssidValid; 2354 memcpy(dst->MBssid, src->MBssid, 6); 2355 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2356 dst->bss_ccx_ver_number = src->bss_ccx_ver_number; 2357 } 2358 2359 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel) 2360 { 2361 if (channel > MAX_CHANNEL_NUMBER) { 2362 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2363 return 0; 2364 } 2365 2366 if (rtllib->active_channel_map[channel] == 2) 2367 return 1; 2368 2369 return 0; 2370 } 2371 2372 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel) 2373 { 2374 if (channel > MAX_CHANNEL_NUMBER) { 2375 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2376 return 0; 2377 } 2378 if (rtllib->active_channel_map[channel] > 0) 2379 return 1; 2380 2381 return 0; 2382 } 2383 EXPORT_SYMBOL(rtllib_legal_channel); 2384 2385 static inline void rtllib_process_probe_response( 2386 struct rtllib_device *ieee, 2387 struct rtllib_probe_response *beacon, 2388 struct rtllib_rx_stats *stats) 2389 { 2390 struct rtllib_network *target; 2391 struct rtllib_network *oldest = NULL; 2392 struct rtllib_info_element *info_element = &beacon->info_element[0]; 2393 unsigned long flags; 2394 short renew; 2395 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), 2396 GFP_ATOMIC); 2397 __le16 frame_ctl = beacon->header.frame_control; 2398 2399 if (!network) 2400 return; 2401 2402 netdev_dbg(ieee->dev, 2403 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2404 escape_essid(info_element->data, info_element->len), 2405 beacon->header.addr3, 2406 (le16_to_cpu(beacon->capability) & (1 << 0xf)) ? '1' : '0', 2407 (le16_to_cpu(beacon->capability) & (1 << 0xe)) ? '1' : '0', 2408 (le16_to_cpu(beacon->capability) & (1 << 0xd)) ? '1' : '0', 2409 (le16_to_cpu(beacon->capability) & (1 << 0xc)) ? '1' : '0', 2410 (le16_to_cpu(beacon->capability) & (1 << 0xb)) ? '1' : '0', 2411 (le16_to_cpu(beacon->capability) & (1 << 0xa)) ? '1' : '0', 2412 (le16_to_cpu(beacon->capability) & (1 << 0x9)) ? '1' : '0', 2413 (le16_to_cpu(beacon->capability) & (1 << 0x8)) ? '1' : '0', 2414 (le16_to_cpu(beacon->capability) & (1 << 0x7)) ? '1' : '0', 2415 (le16_to_cpu(beacon->capability) & (1 << 0x6)) ? '1' : '0', 2416 (le16_to_cpu(beacon->capability) & (1 << 0x5)) ? '1' : '0', 2417 (le16_to_cpu(beacon->capability) & (1 << 0x4)) ? '1' : '0', 2418 (le16_to_cpu(beacon->capability) & (1 << 0x3)) ? '1' : '0', 2419 (le16_to_cpu(beacon->capability) & (1 << 0x2)) ? '1' : '0', 2420 (le16_to_cpu(beacon->capability) & (1 << 0x1)) ? '1' : '0', 2421 (le16_to_cpu(beacon->capability) & (1 << 0x0)) ? '1' : '0'); 2422 2423 if (rtllib_network_init(ieee, beacon, network, stats)) { 2424 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n", 2425 escape_essid(info_element->data, info_element->len), 2426 beacon->header.addr3, 2427 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2428 goto free_network; 2429 } 2430 2431 if (!rtllib_legal_channel(ieee, network->channel)) 2432 goto free_network; 2433 2434 if (ieee80211_is_probe_resp(frame_ctl)) { 2435 if (IsPassiveChannel(ieee, network->channel)) { 2436 netdev_info(ieee->dev, 2437 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", 2438 network->channel); 2439 goto free_network; 2440 } 2441 } 2442 2443 /* The network parsed correctly -- so now we scan our known networks 2444 * to see if we can find it in our list. 2445 * 2446 * NOTE: This search is definitely not optimized. Once its doing 2447 * the "right thing" we'll optimize it for efficiency if 2448 * necessary 2449 */ 2450 2451 /* Search for this entry in the list and update it if it is 2452 * already there. 2453 */ 2454 2455 spin_lock_irqsave(&ieee->lock, flags); 2456 if (is_same_network(&ieee->current_network, network, 2457 (network->ssid_len ? 1 : 0))) { 2458 update_network(ieee, &ieee->current_network, network); 2459 if ((ieee->current_network.mode == WIRELESS_MODE_N_24G || 2460 ieee->current_network.mode == WIRELESS_MODE_G) && 2461 ieee->current_network.berp_info_valid) { 2462 if (ieee->current_network.erp_value & ERP_UseProtection) 2463 ieee->current_network.buseprotection = true; 2464 else 2465 ieee->current_network.buseprotection = false; 2466 } 2467 if (ieee80211_is_beacon(frame_ctl)) { 2468 if (ieee->link_state >= MAC80211_LINKED) 2469 ieee->link_detect_info.num_recv_bcn_in_period++; 2470 } 2471 } 2472 list_for_each_entry(target, &ieee->network_list, list) { 2473 if (is_same_network(target, network, 2474 (target->ssid_len ? 1 : 0))) 2475 break; 2476 if (!oldest || (target->last_scanned < oldest->last_scanned)) 2477 oldest = target; 2478 } 2479 2480 /* If we didn't find a match, then get a new network slot to initialize 2481 * with this beacon's information 2482 */ 2483 if (&target->list == &ieee->network_list) { 2484 if (list_empty(&ieee->network_free_list)) { 2485 /* If there are no more slots, expire the oldest */ 2486 list_del(&oldest->list); 2487 target = oldest; 2488 netdev_dbg(ieee->dev, 2489 "Expired '%s' ( %pM) from network list.\n", 2490 escape_essid(target->ssid, target->ssid_len), 2491 target->bssid); 2492 } else { 2493 /* Otherwise just pull from the free list */ 2494 target = list_entry(ieee->network_free_list.next, 2495 struct rtllib_network, list); 2496 list_del(ieee->network_free_list.next); 2497 } 2498 2499 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n", 2500 escape_essid(network->ssid, network->ssid_len), 2501 network->bssid, 2502 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2503 2504 memcpy(target, network, sizeof(*target)); 2505 list_add_tail(&target->list, &ieee->network_list); 2506 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2507 rtllib_softmac_new_net(ieee, network); 2508 } else { 2509 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n", 2510 escape_essid(target->ssid, target->ssid_len), 2511 target->bssid, 2512 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2513 2514 /* we have an entry and we are going to update it. But this 2515 * entry may be already expired. In this case we do the same 2516 * as we found a new net and call the new_net handler 2517 */ 2518 renew = !time_after(target->last_scanned + ieee->scan_age, 2519 jiffies); 2520 if ((!target->ssid_len) && 2521 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0)) 2522 || ((ieee->current_network.ssid_len == network->ssid_len) && 2523 (strncmp(ieee->current_network.ssid, network->ssid, 2524 network->ssid_len) == 0) && 2525 (ieee->link_state == MAC80211_NOLINK)))) 2526 renew = 1; 2527 update_network(ieee, target, network); 2528 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2529 rtllib_softmac_new_net(ieee, network); 2530 } 2531 2532 spin_unlock_irqrestore(&ieee->lock, flags); 2533 if (ieee80211_is_beacon(frame_ctl) && 2534 is_same_network(&ieee->current_network, network, 2535 (network->ssid_len ? 1 : 0)) && 2536 (ieee->link_state == MAC80211_LINKED)) { 2537 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network); 2538 } 2539 free_network: 2540 kfree(network); 2541 } 2542 2543 static void rtllib_rx_mgt(struct rtllib_device *ieee, 2544 struct sk_buff *skb, 2545 struct rtllib_rx_stats *stats) 2546 { 2547 struct ieee80211_hdr *header = (struct ieee80211_hdr *)skb->data; 2548 2549 if (!ieee80211_is_probe_resp(header->frame_control) && 2550 (!ieee80211_is_beacon(header->frame_control))) 2551 ieee->last_rx_ps_time = jiffies; 2552 2553 if (ieee80211_is_beacon(header->frame_control)) { 2554 netdev_dbg(ieee->dev, "received BEACON\n"); 2555 rtllib_process_probe_response( 2556 ieee, (struct rtllib_probe_response *)header, 2557 stats); 2558 2559 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED && 2560 ieee->iw_mode == IW_MODE_INFRA && 2561 ieee->link_state == MAC80211_LINKED)) 2562 schedule_work(&ieee->ps_task); 2563 } else if (ieee80211_is_probe_resp(header->frame_control)) { 2564 netdev_dbg(ieee->dev, "received PROBE RESPONSE\n"); 2565 rtllib_process_probe_response(ieee, 2566 (struct rtllib_probe_response *)header, stats); 2567 } 2568 } 2569