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 12 Few modifications for Realtek's Wi-Fi drivers by 13 Andrea Merello <andrea.merello@gmail.com> 14 15 A special thanks goes to Realtek for their support ! 16 17 ******************************************************************************/ 18 19 20 #include <linux/compiler.h> 21 #include <linux/errno.h> 22 #include <linux/if_arp.h> 23 #include <linux/in6.h> 24 #include <linux/in.h> 25 #include <linux/ip.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/netdevice.h> 29 #include <linux/pci.h> 30 #include <linux/proc_fs.h> 31 #include <linux/skbuff.h> 32 #include <linux/slab.h> 33 #include <linux/tcp.h> 34 #include <linux/types.h> 35 #include <linux/wireless.h> 36 #include <linux/etherdevice.h> 37 #include <linux/uaccess.h> 38 #include <linux/ctype.h> 39 40 #include "ieee80211.h" 41 #include "dot11d.h" 42 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, 43 struct sk_buff *skb, 44 struct ieee80211_rx_stats *rx_stats) 45 { 46 struct rtl_80211_hdr_4addr *hdr = (struct rtl_80211_hdr_4addr *)skb->data; 47 u16 fc = le16_to_cpu(hdr->frame_ctl); 48 49 skb->dev = ieee->dev; 50 skb_reset_mac_header(skb); 51 52 skb_pull(skb, ieee80211_get_hdrlen(fc)); 53 skb->pkt_type = PACKET_OTHERHOST; 54 skb->protocol = htons(ETH_P_80211_RAW); 55 memset(skb->cb, 0, sizeof(skb->cb)); 56 netif_rx(skb); 57 } 58 59 60 /* Called only as a tasklet (software IRQ) */ 61 static struct ieee80211_frag_entry * 62 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq, 63 unsigned int frag, u8 tid, u8 *src, u8 *dst) 64 { 65 struct ieee80211_frag_entry *entry; 66 int i; 67 68 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { 69 entry = &ieee->frag_cache[tid][i]; 70 if (entry->skb && 71 time_after(jiffies, entry->first_frag_time + 2 * HZ)) { 72 IEEE80211_DEBUG_FRAG( 73 "expiring fragment cache entry " 74 "seq=%u last_frag=%u\n", 75 entry->seq, entry->last_frag); 76 dev_kfree_skb_any(entry->skb); 77 entry->skb = NULL; 78 } 79 80 if (entry->skb && entry->seq == seq && 81 (entry->last_frag + 1 == frag || frag == -1) && 82 memcmp(entry->src_addr, src, ETH_ALEN) == 0 && 83 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) 84 return entry; 85 } 86 87 return NULL; 88 } 89 90 /* Called only as a tasklet (software IRQ) */ 91 static struct sk_buff * 92 ieee80211_frag_cache_get(struct ieee80211_device *ieee, 93 struct rtl_80211_hdr_4addr *hdr) 94 { 95 struct sk_buff *skb = NULL; 96 u16 fc = le16_to_cpu(hdr->frame_ctl); 97 u16 sc = le16_to_cpu(hdr->seq_ctl); 98 unsigned int frag = WLAN_GET_SEQ_FRAG(sc); 99 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 100 struct ieee80211_frag_entry *entry; 101 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 102 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 103 u8 tid; 104 105 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { 106 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr; 107 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 108 tid = UP2AC(tid); 109 tid++; 110 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { 111 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr; 112 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 113 tid = UP2AC(tid); 114 tid++; 115 } else { 116 tid = 0; 117 } 118 119 if (frag == 0) { 120 /* Reserve enough space to fit maximum frame length */ 121 skb = dev_alloc_skb(ieee->dev->mtu + 122 sizeof(struct rtl_80211_hdr_4addr) + 123 8 /* LLC */ + 124 2 /* alignment */ + 125 8 /* WEP */ + 126 ETH_ALEN /* WDS */ + 127 (IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */); 128 if (!skb) 129 return NULL; 130 131 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; 132 ieee->frag_next_idx[tid]++; 133 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN) 134 ieee->frag_next_idx[tid] = 0; 135 136 if (entry->skb) 137 dev_kfree_skb_any(entry->skb); 138 139 entry->first_frag_time = jiffies; 140 entry->seq = seq; 141 entry->last_frag = frag; 142 entry->skb = skb; 143 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); 144 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); 145 } else { 146 /* received a fragment of a frame for which the head fragment 147 * should have already been received */ 148 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid, hdr->addr2, 149 hdr->addr1); 150 if (entry) { 151 entry->last_frag = frag; 152 skb = entry->skb; 153 } 154 } 155 156 return skb; 157 } 158 159 160 /* Called only as a tasklet (software IRQ) */ 161 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, 162 struct rtl_80211_hdr_4addr *hdr) 163 { 164 u16 fc = le16_to_cpu(hdr->frame_ctl); 165 u16 sc = le16_to_cpu(hdr->seq_ctl); 166 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 167 struct ieee80211_frag_entry *entry; 168 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 169 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 170 u8 tid; 171 172 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { 173 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr; 174 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 175 tid = UP2AC(tid); 176 tid++; 177 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { 178 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr; 179 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 180 tid = UP2AC(tid); 181 tid++; 182 } else { 183 tid = 0; 184 } 185 186 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, 187 hdr->addr1); 188 189 if (!entry) { 190 IEEE80211_DEBUG_FRAG( 191 "could not invalidate fragment cache " 192 "entry (seq=%u)\n", seq); 193 return -1; 194 } 195 196 entry->skb = NULL; 197 return 0; 198 } 199 200 201 202 /* ieee80211_rx_frame_mgtmt 203 * 204 * Responsible for handling management control frames 205 * 206 * Called by ieee80211_rx */ 207 static inline int 208 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, 209 struct ieee80211_rx_stats *rx_stats, u16 type, 210 u16 stype) 211 { 212 /* On the struct stats definition there is written that 213 * this is not mandatory.... but seems that the probe 214 * response parser uses it 215 */ 216 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data; 217 218 rx_stats->len = skb->len; 219 ieee80211_rx_mgt(ieee, (struct rtl_80211_hdr_4addr *)skb->data, rx_stats); 220 /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */ 221 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { 222 /* use ADDR1 to perform address matching for Management frames */ 223 dev_kfree_skb_any(skb); 224 return 0; 225 } 226 227 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype); 228 229 dev_kfree_skb_any(skb); 230 231 return 0; 232 233 #ifdef NOT_YET 234 if (ieee->iw_mode == IW_MODE_MASTER) { 235 netdev_dbg(ieee->dev, "Master mode not yet supported.\n"); 236 return 0; 237 /* 238 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *) 239 skb->data);*/ 240 } 241 242 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) { 243 if (stype == WLAN_FC_STYPE_BEACON && 244 ieee->iw_mode == IW_MODE_MASTER) { 245 struct sk_buff *skb2; 246 /* Process beacon frames also in kernel driver to 247 * update STA(AP) table statistics */ 248 skb2 = skb_clone(skb, GFP_ATOMIC); 249 if (skb2) 250 hostap_rx(skb2->dev, skb2, rx_stats); 251 } 252 253 /* send management frames to the user space daemon for 254 * processing */ 255 ieee->apdevstats.rx_packets++; 256 ieee->apdevstats.rx_bytes += skb->len; 257 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); 258 return 0; 259 } 260 261 if (ieee->iw_mode == IW_MODE_MASTER) { 262 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { 263 netdev_dbg(skb->dev, "unknown management frame " 264 "(type=0x%02x, stype=0x%02x) dropped\n", 265 type, stype); 266 return -1; 267 } 268 269 hostap_rx(skb->dev, skb, rx_stats); 270 return 0; 271 } 272 273 netdev_dbg(skb->dev, "hostap_rx_frame_mgmt: management frame " 274 "received in non-Host AP mode\n"); 275 return -1; 276 #endif 277 } 278 279 280 281 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 282 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 283 static unsigned char rfc1042_header[] = { 284 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 285 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 286 static unsigned char bridge_tunnel_header[] = { 287 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 288 /* No encapsulation header if EtherType < 0x600 (=length) */ 289 290 /* Called by ieee80211_rx_frame_decrypt */ 291 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, 292 struct sk_buff *skb, size_t hdrlen) 293 { 294 struct net_device *dev = ieee->dev; 295 u16 fc, ethertype; 296 struct rtl_80211_hdr_4addr *hdr; 297 u8 *pos; 298 299 if (skb->len < 24) 300 return 0; 301 302 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 303 fc = le16_to_cpu(hdr->frame_ctl); 304 305 /* check that the frame is unicast frame to us */ 306 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 307 IEEE80211_FCTL_TODS && 308 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && 309 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { 310 /* ToDS frame with own addr BSSID and DA */ 311 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 312 IEEE80211_FCTL_FROMDS && 313 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { 314 /* FromDS frame with own addr as DA */ 315 } else 316 return 0; 317 318 if (skb->len < 24 + 8) 319 return 0; 320 321 /* check for port access entity Ethernet type */ 322 // pos = skb->data + 24; 323 pos = skb->data + hdrlen; 324 ethertype = (pos[6] << 8) | pos[7]; 325 if (ethertype == ETH_P_PAE) 326 return 1; 327 328 return 0; 329 } 330 331 /* Called only as a tasklet (software IRQ), by ieee80211_rx */ 332 static inline int 333 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, 334 struct ieee80211_crypt_data *crypt) 335 { 336 struct rtl_80211_hdr_4addr *hdr; 337 int res, hdrlen; 338 339 if (!crypt || !crypt->ops->decrypt_mpdu) 340 return 0; 341 if (ieee->hwsec_active) { 342 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE); 343 tcb_desc->bHwSec = 1; 344 } 345 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 346 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 347 348 if (ieee->tkip_countermeasures && 349 strcmp(crypt->ops->name, "TKIP") == 0) { 350 if (net_ratelimit()) { 351 netdev_dbg(ieee->dev, "TKIP countermeasures: dropped " 352 "received packet from %pM\n", 353 hdr->addr2); 354 } 355 return -1; 356 } 357 358 atomic_inc(&crypt->refcnt); 359 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); 360 atomic_dec(&crypt->refcnt); 361 if (res < 0) { 362 IEEE80211_DEBUG_DROP( 363 "decryption failed (SA=%pM" 364 ") res=%d\n", hdr->addr2, res); 365 if (res == -2) 366 IEEE80211_DEBUG_DROP("Decryption failed ICV " 367 "mismatch (key %d)\n", 368 skb->data[hdrlen + 3] >> 6); 369 ieee->ieee_stats.rx_discards_undecryptable++; 370 return -1; 371 } 372 373 return res; 374 } 375 376 377 /* Called only as a tasklet (software IRQ), by ieee80211_rx */ 378 static inline int 379 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb, 380 int keyidx, struct ieee80211_crypt_data *crypt) 381 { 382 struct rtl_80211_hdr_4addr *hdr; 383 int res, hdrlen; 384 385 if (!crypt || !crypt->ops->decrypt_msdu) 386 return 0; 387 if (ieee->hwsec_active) { 388 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE); 389 tcb_desc->bHwSec = 1; 390 } 391 392 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 393 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 394 395 atomic_inc(&crypt->refcnt); 396 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); 397 atomic_dec(&crypt->refcnt); 398 if (res < 0) { 399 netdev_dbg(ieee->dev, "MSDU decryption/MIC verification failed" 400 " (SA=%pM keyidx=%d)\n", 401 hdr->addr2, keyidx); 402 return -1; 403 } 404 405 return 0; 406 } 407 408 409 /* this function is stolen from ipw2200 driver*/ 410 #define IEEE_PACKET_RETRY_TIME (5 * HZ) 411 static int is_duplicate_packet(struct ieee80211_device *ieee, 412 struct rtl_80211_hdr_4addr *header) 413 { 414 u16 fc = le16_to_cpu(header->frame_ctl); 415 u16 sc = le16_to_cpu(header->seq_ctl); 416 u16 seq = WLAN_GET_SEQ_SEQ(sc); 417 u16 frag = WLAN_GET_SEQ_FRAG(sc); 418 u16 *last_seq, *last_frag; 419 unsigned long *last_time; 420 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 421 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 422 u8 tid; 423 424 425 //TO2DS and QoS 426 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { 427 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)header; 428 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 429 tid = UP2AC(tid); 430 tid++; 431 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS 432 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header; 433 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 434 tid = UP2AC(tid); 435 tid++; 436 } else { // no QoS 437 tid = 0; 438 } 439 440 switch (ieee->iw_mode) { 441 case IW_MODE_ADHOC: 442 { 443 struct list_head *p; 444 struct ieee_ibss_seq *entry = NULL; 445 u8 *mac = header->addr2; 446 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; 447 448 list_for_each(p, &ieee->ibss_mac_hash[index]) { 449 entry = list_entry(p, struct ieee_ibss_seq, list); 450 if (!memcmp(entry->mac, mac, ETH_ALEN)) 451 break; 452 } 453 // if (memcmp(entry->mac, mac, ETH_ALEN)){ 454 if (p == &ieee->ibss_mac_hash[index]) { 455 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC); 456 if (!entry) 457 return 0; 458 memcpy(entry->mac, mac, ETH_ALEN); 459 entry->seq_num[tid] = seq; 460 entry->frag_num[tid] = frag; 461 entry->packet_time[tid] = jiffies; 462 list_add(&entry->list, &ieee->ibss_mac_hash[index]); 463 return 0; 464 } 465 last_seq = &entry->seq_num[tid]; 466 last_frag = &entry->frag_num[tid]; 467 last_time = &entry->packet_time[tid]; 468 break; 469 } 470 471 case IW_MODE_INFRA: 472 last_seq = &ieee->last_rxseq_num[tid]; 473 last_frag = &ieee->last_rxfrag_num[tid]; 474 last_time = &ieee->last_packet_time[tid]; 475 476 break; 477 default: 478 return 0; 479 } 480 481 // if(tid != 0) { 482 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl); 483 // } 484 if ((*last_seq == seq) && 485 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { 486 if (*last_frag == frag) 487 goto drop; 488 if (*last_frag + 1 != frag) 489 /* out-of-order fragment */ 490 goto drop; 491 } else 492 *last_seq = seq; 493 494 *last_frag = frag; 495 *last_time = jiffies; 496 return 0; 497 498 drop: 499 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY)); 500 501 return 1; 502 } 503 504 static bool AddReorderEntry(struct rx_ts_record *pTS, struct rx_reorder_entry *pReorderEntry) 505 { 506 struct list_head *pList = &pTS->rx_pending_pkt_list; 507 while (pList->next != &pTS->rx_pending_pkt_list) { 508 if (SN_LESS(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum)) 509 pList = pList->next; 510 else if (SN_EQUAL(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum)) 511 return false; 512 else 513 break; 514 } 515 pReorderEntry->List.next = pList->next; 516 pReorderEntry->List.next->prev = &pReorderEntry->List; 517 pReorderEntry->List.prev = pList; 518 pList->next = &pReorderEntry->List; 519 520 return true; 521 } 522 523 static void indicate_packets(struct ieee80211_device *ieee, 524 struct ieee80211_rxb *rxb) 525 { 526 struct net_device_stats *stats = &ieee->stats; 527 struct net_device *dev = ieee->dev; 528 u16 ethertype; 529 u8 i; 530 531 for (i = 0; i < rxb->nr_subframes; i++) { 532 struct sk_buff *sub_skb = rxb->subframes[i]; 533 534 if (!sub_skb) 535 continue; 536 537 /* convert hdr + possible LLC headers into Ethernet header */ 538 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 539 if (sub_skb->len >= 8 && 540 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) && 541 ethertype != ETH_P_AARP && 542 ethertype != ETH_P_IPX) || 543 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) { 544 /* remove RFC1042 or Bridge-Tunnel encapsulation and 545 * replace EtherType */ 546 skb_pull(sub_skb, SNAP_SIZE); 547 } else { 548 /* Leave Ethernet header part of hdr and full payload */ 549 put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2)); 550 } 551 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->src, ETH_ALEN); 552 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->dst, ETH_ALEN); 553 554 stats->rx_packets++; 555 stats->rx_bytes += sub_skb->len; 556 if (is_multicast_ether_addr(rxb->dst)) 557 stats->multicast++; 558 559 /* Indicate the packets to upper layer */ 560 sub_skb->protocol = eth_type_trans(sub_skb, dev); 561 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 562 sub_skb->dev = dev; 563 /* 802.11 crc not sufficient */ 564 sub_skb->ip_summed = CHECKSUM_NONE; 565 ieee->last_rx_ps_time = jiffies; 566 netif_rx(sub_skb); 567 } 568 } 569 570 void ieee80211_indicate_packets(struct ieee80211_device *ieee, 571 struct ieee80211_rxb **prxbIndicateArray, 572 u8 index) 573 { 574 u8 i; 575 576 for (i = 0; i < index; i++) { 577 struct ieee80211_rxb *prxb = prxbIndicateArray[i]; 578 579 indicate_packets(ieee, prxb); 580 kfree(prxb); 581 prxb = NULL; 582 } 583 } 584 585 static void RxReorderIndicatePacket(struct ieee80211_device *ieee, 586 struct ieee80211_rxb *prxb, 587 struct rx_ts_record *pTS, u16 SeqNum) 588 { 589 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 590 struct rx_reorder_entry *pReorderEntry = NULL; 591 struct ieee80211_rxb **prxbIndicateArray; 592 u8 WinSize = pHTInfo->RxReorderWinSize; 593 u16 WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096; 594 u8 index = 0; 595 bool bMatchWinStart = false, bPktInBuf = false; 596 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Seq is %d,pTS->rx_indicate_seq is %d, WinSize is %d\n", __func__, SeqNum, pTS->rx_indicate_seq, WinSize); 597 598 prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE, 599 sizeof(struct ieee80211_rxb *), 600 GFP_ATOMIC); 601 if (!prxbIndicateArray) 602 return; 603 604 /* Rx Reorder initialize condition.*/ 605 if (pTS->rx_indicate_seq == 0xffff) 606 pTS->rx_indicate_seq = SeqNum; 607 608 /* Drop out the packet which SeqNum is smaller than WinStart */ 609 if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) { 610 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n", 611 pTS->rx_indicate_seq, SeqNum); 612 pHTInfo->RxReorderDropCounter++; 613 { 614 int i; 615 for (i = 0; i < prxb->nr_subframes; i++) 616 dev_kfree_skb(prxb->subframes[i]); 617 618 kfree(prxb); 619 prxb = NULL; 620 } 621 622 kfree(prxbIndicateArray); 623 return; 624 } 625 626 /* 627 * Sliding window manipulation. Conditions includes: 628 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 629 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N 630 */ 631 if (SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) { 632 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096; 633 bMatchWinStart = true; 634 } else if (SN_LESS(WinEnd, SeqNum)) { 635 if (SeqNum >= (WinSize - 1)) 636 pTS->rx_indicate_seq = SeqNum + 1 - WinSize; 637 else 638 pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1; 639 640 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum); 641 } 642 643 /* 644 * Indication process. 645 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets 646 * with the SeqNum smaller than latest WinStart and buffer other packets. 647 */ 648 /* For Rx Reorder condition: 649 * 1. All packets with SeqNum smaller than WinStart => Indicate 650 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. 651 */ 652 if (bMatchWinStart) { 653 /* Current packet is going to be indicated.*/ 654 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\ 655 pTS->rx_indicate_seq, SeqNum); 656 prxbIndicateArray[0] = prxb; 657 // printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum); 658 index = 1; 659 } else { 660 /* Current packet is going to be inserted into pending list.*/ 661 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__); 662 if (!list_empty(&ieee->RxReorder_Unused_List)) { 663 pReorderEntry = list_entry(ieee->RxReorder_Unused_List.next, struct rx_reorder_entry, List); 664 list_del_init(&pReorderEntry->List); 665 666 /* Make a reorder entry and insert into a the packet list.*/ 667 pReorderEntry->SeqNum = SeqNum; 668 pReorderEntry->prxb = prxb; 669 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum); 670 671 if (!AddReorderEntry(pTS, pReorderEntry)) { 672 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n", 673 __func__, pTS->rx_indicate_seq, SeqNum); 674 list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List); 675 { 676 int i; 677 for (i = 0; i < prxb->nr_subframes; i++) 678 dev_kfree_skb(prxb->subframes[i]); 679 680 kfree(prxb); 681 prxb = NULL; 682 } 683 } else { 684 IEEE80211_DEBUG(IEEE80211_DL_REORDER, 685 "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum); 686 } 687 } else { 688 /* 689 * Packets are dropped if there is not enough reorder entries. 690 * This part shall be modified!! We can just indicate all the 691 * packets in buffer and get reorder entries. 692 */ 693 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n"); 694 { 695 int i; 696 for (i = 0; i < prxb->nr_subframes; i++) 697 dev_kfree_skb(prxb->subframes[i]); 698 699 kfree(prxb); 700 prxb = NULL; 701 } 702 } 703 } 704 705 /* Check if there is any packet need indicate.*/ 706 while (!list_empty(&pTS->rx_pending_pkt_list)) { 707 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): start RREORDER indicate\n", __func__); 708 pReorderEntry = list_entry(pTS->rx_pending_pkt_list.prev, struct rx_reorder_entry, List); 709 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) || 710 SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) { 711 /* This protect buffer from overflow. */ 712 if (index >= REORDER_WIN_SIZE) { 713 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n"); 714 bPktInBuf = true; 715 break; 716 } 717 718 list_del_init(&pReorderEntry->List); 719 720 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) 721 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096; 722 723 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum); 724 prxbIndicateArray[index] = pReorderEntry->prxb; 725 // printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum); 726 index++; 727 728 list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List); 729 } else { 730 bPktInBuf = true; 731 break; 732 } 733 } 734 735 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/ 736 if (index > 0) { 737 // Cancel previous pending timer. 738 // del_timer_sync(&pTS->rx_pkt_pending_timer); 739 pTS->rx_timeout_indicate_seq = 0xffff; 740 741 // Indicate packets 742 if (index > REORDER_WIN_SIZE) { 743 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n"); 744 kfree(prxbIndicateArray); 745 return; 746 } 747 ieee80211_indicate_packets(ieee, prxbIndicateArray, index); 748 } 749 750 if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) { 751 // Set new pending timer. 752 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): SET rx timeout timer\n", __func__); 753 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq; 754 if (timer_pending(&pTS->rx_pkt_pending_timer)) 755 del_timer_sync(&pTS->rx_pkt_pending_timer); 756 pTS->rx_pkt_pending_timer.expires = jiffies + 757 msecs_to_jiffies(pHTInfo->RxReorderPendingTime); 758 add_timer(&pTS->rx_pkt_pending_timer); 759 } 760 761 kfree(prxbIndicateArray); 762 } 763 764 static u8 parse_subframe(struct ieee80211_device *ieee, 765 struct sk_buff *skb, 766 struct ieee80211_rx_stats *rx_stats, 767 struct ieee80211_rxb *rxb, u8 *src, u8 *dst) 768 { 769 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data; 770 u16 fc = le16_to_cpu(hdr->frame_ctl); 771 772 u16 LLCOffset = sizeof(struct rtl_80211_hdr_3addr); 773 u16 ChkLength; 774 bool bIsAggregateFrame = false; 775 u16 nSubframe_Length; 776 u8 nPadding_Length = 0; 777 u16 SeqNum = 0; 778 779 struct sk_buff *sub_skb; 780 /* just for debug purpose */ 781 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl)); 782 783 if ((IEEE80211_QOS_HAS_SEQ(fc)) && \ 784 (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) { 785 bIsAggregateFrame = true; 786 } 787 788 if (IEEE80211_QOS_HAS_SEQ(fc)) 789 LLCOffset += 2; 790 791 if (rx_stats->bContainHTC) 792 LLCOffset += HTCLNG; 793 794 // Null packet, don't indicate it to upper layer 795 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/ 796 797 if (skb->len <= ChkLength) 798 return 0; 799 800 skb_pull(skb, LLCOffset); 801 802 if (!bIsAggregateFrame) { 803 rxb->nr_subframes = 1; 804 #ifdef JOHN_NOCPY 805 rxb->subframes[0] = skb; 806 #else 807 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC); 808 #endif 809 810 memcpy(rxb->src, src, ETH_ALEN); 811 memcpy(rxb->dst, dst, ETH_ALEN); 812 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len); 813 return 1; 814 } else { 815 rxb->nr_subframes = 0; 816 memcpy(rxb->src, src, ETH_ALEN); 817 memcpy(rxb->dst, dst, ETH_ALEN); 818 while (skb->len > ETHERNET_HEADER_SIZE) { 819 /* Offset 12 denote 2 mac address */ 820 nSubframe_Length = *((u16 *)(skb->data + 12)); 821 //==m==>change the length order 822 nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8); 823 824 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { 825 netdev_dbg(ieee->dev, "A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", 826 rxb->nr_subframes); 827 netdev_dbg(ieee->dev, "A-MSDU parse error!! Subframe Length: %d\n", nSubframe_Length); 828 netdev_dbg(ieee->dev, "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length); 829 netdev_dbg(ieee->dev, "The Packet SeqNum is %d\n", SeqNum); 830 return 0; 831 } 832 833 /* move the data point to data content */ 834 skb_pull(skb, ETHERNET_HEADER_SIZE); 835 836 #ifdef JOHN_NOCPY 837 sub_skb = skb_clone(skb, GFP_ATOMIC); 838 sub_skb->len = nSubframe_Length; 839 sub_skb->tail = sub_skb->data + nSubframe_Length; 840 #else 841 /* Allocate new skb for releasing to upper layer */ 842 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 843 if (!sub_skb) 844 return 0; 845 skb_reserve(sub_skb, 12); 846 skb_put_data(sub_skb, skb->data, nSubframe_Length); 847 #endif 848 rxb->subframes[rxb->nr_subframes++] = sub_skb; 849 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 850 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n"); 851 break; 852 } 853 skb_pull(skb, nSubframe_Length); 854 855 if (skb->len != 0) { 856 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4); 857 if (nPadding_Length == 4) 858 nPadding_Length = 0; 859 860 if (skb->len < nPadding_Length) 861 return 0; 862 863 skb_pull(skb, nPadding_Length); 864 } 865 } 866 #ifdef JOHN_NOCPY 867 dev_kfree_skb(skb); 868 #endif 869 //{just for debug added by david 870 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes); 871 //} 872 return rxb->nr_subframes; 873 } 874 } 875 876 /* All received frames are sent to this function. @skb contains the frame in 877 * IEEE 802.11 format, i.e., in the format it was sent over air. 878 * This function is called only as a tasklet (software IRQ). */ 879 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, 880 struct ieee80211_rx_stats *rx_stats) 881 { 882 struct net_device *dev = ieee->dev; 883 struct rtl_80211_hdr_4addr *hdr; 884 //struct rtl_80211_hdr_3addrqos *hdr; 885 886 size_t hdrlen; 887 u16 fc, type, stype, sc; 888 struct net_device_stats *stats; 889 unsigned int frag; 890 //added by amy for reorder 891 u8 TID = 0; 892 u16 SeqNum = 0; 893 struct rx_ts_record *pTS = NULL; 894 //bool bIsAggregateFrame = false; 895 //added by amy for reorder 896 #ifdef NOT_YET 897 struct net_device *wds = NULL; 898 struct net_device *wds = NULL; 899 int from_assoc_ap = 0; 900 void *sta = NULL; 901 #endif 902 // u16 qos_ctl = 0; 903 u8 dst[ETH_ALEN]; 904 u8 src[ETH_ALEN]; 905 u8 bssid[ETH_ALEN]; 906 struct ieee80211_crypt_data *crypt = NULL; 907 int keyidx = 0; 908 909 int i; 910 struct ieee80211_rxb *rxb = NULL; 911 // cheat the hdr type 912 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 913 stats = &ieee->stats; 914 915 if (skb->len < 10) { 916 netdev_info(dev, "SKB length < 10\n"); 917 goto rx_dropped; 918 } 919 920 fc = le16_to_cpu(hdr->frame_ctl); 921 type = WLAN_FC_GET_TYPE(fc); 922 stype = WLAN_FC_GET_STYPE(fc); 923 sc = le16_to_cpu(hdr->seq_ctl); 924 925 frag = WLAN_GET_SEQ_FRAG(sc); 926 hdrlen = ieee80211_get_hdrlen(fc); 927 928 if (HTCCheck(ieee, skb->data)) { 929 if (net_ratelimit()) 930 netdev_warn(dev, "find HTCControl\n"); 931 hdrlen += 4; 932 rx_stats->bContainHTC = true; 933 } 934 935 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 936 #ifdef NOT_YET 937 /* Put this code here so that we avoid duplicating it in all 938 * Rx paths. - Jean II */ 939 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ 940 /* If spy monitoring on */ 941 if (iface->spy_data.spy_number > 0) { 942 struct iw_quality wstats; 943 wstats.level = rx_stats->rssi; 944 wstats.noise = rx_stats->noise; 945 wstats.updated = 6; /* No qual value */ 946 /* Update spy records */ 947 wireless_spy_update(dev, hdr->addr2, &wstats); 948 } 949 #endif /* IW_WIRELESS_SPY */ 950 hostap_update_rx_stats(local->ap, hdr, rx_stats); 951 #endif 952 953 if (ieee->iw_mode == IW_MODE_MONITOR) { 954 unsigned int len = skb->len; 955 956 ieee80211_monitor_rx(ieee, skb, rx_stats); 957 stats->rx_packets++; 958 stats->rx_bytes += len; 959 return 1; 960 } 961 962 if (ieee->host_decrypt) { 963 int idx = 0; 964 if (skb->len >= hdrlen + 3) 965 idx = skb->data[hdrlen + 3] >> 6; 966 crypt = ieee->crypt[idx]; 967 #ifdef NOT_YET 968 sta = NULL; 969 970 /* Use station specific key to override default keys if the 971 * receiver address is a unicast address ("individual RA"). If 972 * bcrx_sta_key parameter is set, station specific key is used 973 * even with broad/multicast targets (this is against IEEE 974 * 802.11, but makes it easier to use different keys with 975 * stations that do not support WEP key mapping). */ 976 977 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) 978 (void)hostap_handle_sta_crypto(local, hdr, &crypt, 979 &sta); 980 #endif 981 982 /* allow NULL decrypt to indicate an station specific override 983 * for default encryption */ 984 if (crypt && (!crypt->ops || !crypt->ops->decrypt_mpdu)) 985 crypt = NULL; 986 987 if (!crypt && (fc & IEEE80211_FCTL_WEP)) { 988 /* This seems to be triggered by some (multicast?) 989 * frames from other than current BSS, so just drop the 990 * frames silently instead of filling system log with 991 * these reports. */ 992 IEEE80211_DEBUG_DROP("Decryption failed (not set)" 993 " (SA=%pM)\n", 994 hdr->addr2); 995 ieee->ieee_stats.rx_discards_undecryptable++; 996 goto rx_dropped; 997 } 998 } 999 1000 if (skb->len < IEEE80211_DATA_HDR3_LEN) 1001 goto rx_dropped; 1002 1003 // if QoS enabled, should check the sequence for each of the AC 1004 if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) { 1005 if (is_duplicate_packet(ieee, hdr)) 1006 goto rx_dropped; 1007 1008 } else { 1009 struct rx_ts_record *pRxTS = NULL; 1010 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid); 1011 if (GetTs( 1012 ieee, 1013 (struct ts_common_info **)&pRxTS, 1014 hdr->addr2, 1015 Frame_QoSTID((u8 *)(skb->data)), 1016 RX_DIR, 1017 true)) { 1018 1019 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->rx_last_frag_num is %d,frag is %d,pRxTS->rx_last_seq_num is %d,seq is %d\n",__func__,pRxTS->rx_last_frag_num,frag,pRxTS->rx_last_seq_num,WLAN_GET_SEQ_SEQ(sc)); 1020 if ((fc & (1 << 11)) && 1021 (frag == pRxTS->rx_last_frag_num) && 1022 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) { 1023 goto rx_dropped; 1024 } else { 1025 pRxTS->rx_last_frag_num = frag; 1026 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc); 1027 } 1028 } else { 1029 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__); 1030 goto rx_dropped; 1031 } 1032 } 1033 if (type == IEEE80211_FTYPE_MGMT) { 1034 1035 1036 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1037 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1038 goto rx_dropped; 1039 else 1040 goto rx_exit; 1041 } 1042 1043 /* Data frame - extract src/dst addresses */ 1044 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { 1045 case IEEE80211_FCTL_FROMDS: 1046 memcpy(dst, hdr->addr1, ETH_ALEN); 1047 memcpy(src, hdr->addr3, ETH_ALEN); 1048 memcpy(bssid, hdr->addr2, ETH_ALEN); 1049 break; 1050 case IEEE80211_FCTL_TODS: 1051 memcpy(dst, hdr->addr3, ETH_ALEN); 1052 memcpy(src, hdr->addr2, ETH_ALEN); 1053 memcpy(bssid, hdr->addr1, ETH_ALEN); 1054 break; 1055 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: 1056 if (skb->len < IEEE80211_DATA_HDR4_LEN) 1057 goto rx_dropped; 1058 memcpy(dst, hdr->addr3, ETH_ALEN); 1059 memcpy(src, hdr->addr4, ETH_ALEN); 1060 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); 1061 break; 1062 default: 1063 memcpy(dst, hdr->addr1, ETH_ALEN); 1064 memcpy(src, hdr->addr2, ETH_ALEN); 1065 memcpy(bssid, hdr->addr3, ETH_ALEN); 1066 break; 1067 } 1068 1069 #ifdef NOT_YET 1070 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) 1071 goto rx_dropped; 1072 if (wds) { 1073 skb->dev = dev = wds; 1074 stats = hostap_get_stats(dev); 1075 } 1076 1077 if (ieee->iw_mode == IW_MODE_MASTER && !wds && 1078 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS && 1079 ieee->stadev && 1080 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { 1081 /* Frame from BSSID of the AP for which we are a client */ 1082 skb->dev = dev = ieee->stadev; 1083 stats = hostap_get_stats(dev); 1084 from_assoc_ap = 1; 1085 } 1086 1087 if ((ieee->iw_mode == IW_MODE_MASTER || 1088 ieee->iw_mode == IW_MODE_REPEAT) && 1089 !from_assoc_ap) { 1090 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, 1091 wds)) { 1092 case AP_RX_CONTINUE_NOT_AUTHORIZED: 1093 case AP_RX_CONTINUE: 1094 break; 1095 case AP_RX_DROP: 1096 goto rx_dropped; 1097 case AP_RX_EXIT: 1098 goto rx_exit; 1099 } 1100 } 1101 #endif 1102 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1103 /* Nullfunc frames may have PS-bit set, so they must be passed to 1104 * hostap_handle_sta_rx() before being dropped here. */ 1105 if (stype != IEEE80211_STYPE_DATA && 1106 stype != IEEE80211_STYPE_DATA_CFACK && 1107 stype != IEEE80211_STYPE_DATA_CFPOLL && 1108 stype != IEEE80211_STYPE_DATA_CFACKPOLL && 1109 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4 1110 ) { 1111 if (stype != IEEE80211_STYPE_NULLFUNC) 1112 IEEE80211_DEBUG_DROP( 1113 "RX: dropped data frame " 1114 "with no data (type=0x%02x, " 1115 "subtype=0x%02x, len=%d)\n", 1116 type, stype, skb->len); 1117 goto rx_dropped; 1118 } 1119 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) 1120 goto rx_dropped; 1121 1122 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ 1123 1124 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP)) { 1125 keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt); 1126 if (keyidx < 0) { 1127 netdev_dbg(ieee->dev, "decrypt frame error\n"); 1128 goto rx_dropped; 1129 } 1130 } 1131 1132 1133 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1134 1135 /* skb: hdr + (possibly fragmented) plaintext payload */ 1136 // PR: FIXME: hostap has additional conditions in the "if" below: 1137 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1138 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1139 int flen; 1140 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); 1141 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); 1142 1143 if (!frag_skb) { 1144 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, 1145 "Rx cannot get skb from fragment " 1146 "cache (morefrag=%d seq=%u frag=%u)\n", 1147 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1148 WLAN_GET_SEQ_SEQ(sc), frag); 1149 goto rx_dropped; 1150 } 1151 flen = skb->len; 1152 if (frag != 0) 1153 flen -= hdrlen; 1154 1155 if (frag_skb->tail + flen > frag_skb->end) { 1156 netdev_warn(dev, "host decrypted and " 1157 "reassembled frame did not fit skb\n"); 1158 ieee80211_frag_cache_invalidate(ieee, hdr); 1159 goto rx_dropped; 1160 } 1161 1162 if (frag == 0) { 1163 /* copy first fragment (including full headers) into 1164 * beginning of the fragment cache skb */ 1165 skb_put_data(frag_skb, skb->data, flen); 1166 } else { 1167 /* append frame payload to the end of the fragment 1168 * cache skb */ 1169 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1170 } 1171 dev_kfree_skb_any(skb); 1172 skb = NULL; 1173 1174 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1175 /* more fragments expected - leave the skb in fragment 1176 * cache for now; it will be delivered to upper layers 1177 * after all fragments have been received */ 1178 goto rx_exit; 1179 } 1180 1181 /* this was the last fragment and the frame will be 1182 * delivered, so remove skb from fragment cache */ 1183 skb = frag_skb; 1184 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1185 ieee80211_frag_cache_invalidate(ieee, hdr); 1186 } 1187 1188 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1189 * encrypted/authenticated */ 1190 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1191 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1192 netdev_dbg(ieee->dev, "==>decrypt msdu error\n"); 1193 goto rx_dropped; 1194 } 1195 1196 //added by amy for AP roaming 1197 ieee->LinkDetectInfo.NumRecvDataInPeriod++; 1198 ieee->LinkDetectInfo.NumRxOkInPeriod++; 1199 1200 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1201 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { 1202 if (/*ieee->ieee802_1x &&*/ 1203 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1204 1205 #ifdef CONFIG_IEEE80211_DEBUG 1206 /* pass unencrypted EAPOL frames even if encryption is 1207 * configured */ 1208 struct eapol *eap = (struct eapol *)(skb->data + 1209 24); 1210 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1211 eap_get_type(eap->type)); 1212 #endif 1213 } else { 1214 IEEE80211_DEBUG_DROP( 1215 "encryption configured, but RX " 1216 "frame not encrypted (SA=%pM)\n", 1217 hdr->addr2); 1218 goto rx_dropped; 1219 } 1220 } 1221 1222 #ifdef CONFIG_IEEE80211_DEBUG 1223 if (crypt && !(fc & IEEE80211_FCTL_WEP) && 1224 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1225 struct eapol *eap = (struct eapol *)(skb->data + 1226 24); 1227 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1228 eap_get_type(eap->type)); 1229 } 1230 #endif 1231 1232 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && 1233 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1234 IEEE80211_DEBUG_DROP( 1235 "dropped unencrypted RX data " 1236 "frame from %pM" 1237 " (drop_unencrypted=1)\n", 1238 hdr->addr2); 1239 goto rx_dropped; 1240 } 1241 /* 1242 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1243 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); 1244 } 1245 */ 1246 //added by amy for reorder 1247 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1248 && !is_multicast_ether_addr(hdr->addr1)) { 1249 TID = Frame_QoSTID(skb->data); 1250 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1251 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true); 1252 if (TID != 0 && TID != 3) 1253 ieee->bis_any_nonbepkts = true; 1254 } 1255 //added by amy for reorder 1256 /* skb: hdr + (possible reassembled) full plaintext payload */ 1257 //ethertype = (payload[6] << 8) | payload[7]; 1258 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC); 1259 if (!rxb) 1260 goto rx_dropped; 1261 /* to parse amsdu packets */ 1262 /* qos data packets & reserved bit is 1 */ 1263 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { 1264 /* only to free rxb, and not submit the packets to upper layer */ 1265 for (i = 0; i < rxb->nr_subframes; i++) 1266 dev_kfree_skb(rxb->subframes[i]); 1267 1268 kfree(rxb); 1269 rxb = NULL; 1270 goto rx_dropped; 1271 } 1272 1273 //added by amy for reorder 1274 if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) { 1275 indicate_packets(ieee, rxb); 1276 kfree(rxb); 1277 rxb = NULL; 1278 1279 } else { 1280 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__); 1281 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); 1282 } 1283 #ifndef JOHN_NOCPY 1284 dev_kfree_skb(skb); 1285 #endif 1286 1287 rx_exit: 1288 #ifdef NOT_YET 1289 if (sta) 1290 hostap_handle_sta_release(sta); 1291 #endif 1292 return 1; 1293 1294 rx_dropped: 1295 kfree(rxb); 1296 rxb = NULL; 1297 stats->rx_dropped++; 1298 1299 /* Returning 0 indicates to caller that we have not handled the SKB-- 1300 * so it is still allocated and can be used again by underlying 1301 * hardware as a DMA target */ 1302 return 0; 1303 } 1304 EXPORT_SYMBOL(ieee80211_rx); 1305 1306 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 1307 1308 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1309 1310 /* 1311 * Make the structure we read from the beacon packet to have 1312 * the right values 1313 */ 1314 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element 1315 *info_element, int sub_type) 1316 { 1317 if (info_element->elementID != QOS_ELEMENT_ID) 1318 return -1; 1319 if (info_element->qui_subtype != sub_type) 1320 return -1; 1321 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1322 return -1; 1323 if (info_element->qui_type != QOS_OUI_TYPE) 1324 return -1; 1325 if (info_element->version != QOS_VERSION_1) 1326 return -1; 1327 1328 return 0; 1329 } 1330 1331 1332 /* 1333 * Parse a QoS parameter element 1334 */ 1335 static int ieee80211_read_qos_param_element( 1336 struct ieee80211_qos_parameter_info *element_param, 1337 struct ieee80211_info_element *info_element) 1338 { 1339 size_t size = sizeof(*element_param); 1340 1341 if (!element_param || !info_element || info_element->len != size - 2) 1342 return -1; 1343 1344 memcpy(element_param, info_element, size); 1345 return ieee80211_verify_qos_info(&element_param->info_element, 1346 QOS_OUI_PARAM_SUB_TYPE); 1347 } 1348 1349 /* 1350 * Parse a QoS information element 1351 */ 1352 static int ieee80211_read_qos_info_element( 1353 struct ieee80211_qos_information_element *element_info, 1354 struct ieee80211_info_element *info_element) 1355 { 1356 size_t size = sizeof(*element_info); 1357 1358 if (!element_info || !info_element || info_element->len != size - 2) 1359 return -1; 1360 1361 memcpy(element_info, info_element, size); 1362 return ieee80211_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE); 1363 } 1364 1365 1366 /* 1367 * Write QoS parameters from the ac parameters. 1368 */ 1369 static int ieee80211_qos_convert_ac_to_parameters( 1370 struct ieee80211_qos_parameter_info *param_elm, 1371 struct ieee80211_qos_parameters *qos_param) 1372 { 1373 int i; 1374 struct ieee80211_qos_ac_parameter *ac_params; 1375 u8 aci; 1376 //u8 cw_min; 1377 //u8 cw_max; 1378 1379 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1380 ac_params = &(param_elm->ac_params_record[i]); 1381 1382 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1383 1384 if (aci >= QOS_QUEUE_NUM) 1385 continue; 1386 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1387 1388 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1389 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci]; 1390 1391 qos_param->cw_min[aci] = 1392 cpu_to_le16(ac_params->ecw_min_max & 0x0F); 1393 1394 qos_param->cw_max[aci] = 1395 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4); 1396 1397 qos_param->flag[aci] = 1398 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1399 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1400 } 1401 return 0; 1402 } 1403 1404 /* 1405 * we have a generic data element which it may contain QoS information or 1406 * parameters element. check the information element length to decide 1407 * which type to read 1408 */ 1409 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element 1410 *info_element, 1411 struct ieee80211_network *network) 1412 { 1413 int rc = 0; 1414 struct ieee80211_qos_parameters *qos_param = NULL; 1415 struct ieee80211_qos_information_element qos_info_element; 1416 1417 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); 1418 1419 if (rc == 0) { 1420 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1421 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1422 } else { 1423 struct ieee80211_qos_parameter_info param_element; 1424 1425 rc = ieee80211_read_qos_param_element(¶m_element, 1426 info_element); 1427 if (rc == 0) { 1428 qos_param = &(network->qos_data.parameters); 1429 ieee80211_qos_convert_ac_to_parameters(¶m_element, 1430 qos_param); 1431 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1432 network->qos_data.param_count = 1433 param_element.info_element.ac_info & 0x0F; 1434 } 1435 } 1436 1437 if (rc == 0) { 1438 IEEE80211_DEBUG_QOS("QoS is supported\n"); 1439 network->qos_data.supported = 1; 1440 } 1441 return rc; 1442 } 1443 1444 #ifdef CONFIG_IEEE80211_DEBUG 1445 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x 1446 1447 static const char *get_info_element_string(u16 id) 1448 { 1449 switch (id) { 1450 MFIE_STRING(SSID); 1451 MFIE_STRING(RATES); 1452 MFIE_STRING(FH_SET); 1453 MFIE_STRING(DS_SET); 1454 MFIE_STRING(CF_SET); 1455 MFIE_STRING(TIM); 1456 MFIE_STRING(IBSS_SET); 1457 MFIE_STRING(COUNTRY); 1458 MFIE_STRING(HOP_PARAMS); 1459 MFIE_STRING(HOP_TABLE); 1460 MFIE_STRING(REQUEST); 1461 MFIE_STRING(CHALLENGE); 1462 MFIE_STRING(POWER_CONSTRAINT); 1463 MFIE_STRING(POWER_CAPABILITY); 1464 MFIE_STRING(TPC_REQUEST); 1465 MFIE_STRING(TPC_REPORT); 1466 MFIE_STRING(SUPP_CHANNELS); 1467 MFIE_STRING(CSA); 1468 MFIE_STRING(MEASURE_REQUEST); 1469 MFIE_STRING(MEASURE_REPORT); 1470 MFIE_STRING(QUIET); 1471 MFIE_STRING(IBSS_DFS); 1472 // MFIE_STRING(ERP_INFO); 1473 MFIE_STRING(RSN); 1474 MFIE_STRING(RATES_EX); 1475 MFIE_STRING(GENERIC); 1476 MFIE_STRING(QOS_PARAMETER); 1477 default: 1478 return "UNKNOWN"; 1479 } 1480 } 1481 #endif 1482 1483 static inline void ieee80211_extract_country_ie( 1484 struct ieee80211_device *ieee, 1485 struct ieee80211_info_element *info_element, 1486 struct ieee80211_network *network, 1487 u8 *addr2 1488 ) 1489 { 1490 if (IS_DOT11D_ENABLE(ieee)) { 1491 if (info_element->len != 0) { 1492 memcpy(network->CountryIeBuf, info_element->data, info_element->len); 1493 network->CountryIeLen = info_element->len; 1494 1495 if (!IS_COUNTRY_IE_VALID(ieee)) { 1496 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data); 1497 } 1498 } 1499 1500 // 1501 // 070305, rcnjko: I update country IE watch dog here because 1502 // some AP (e.g. Cisco 1242) don't include country IE in their 1503 // probe response frame. 1504 // 1505 if (IS_EQUAL_CIE_SRC(ieee, addr2)) 1506 UPDATE_CIE_WATCHDOG(ieee); 1507 } 1508 } 1509 1510 int ieee80211_parse_info_param(struct ieee80211_device *ieee, 1511 struct ieee80211_info_element *info_element, 1512 u16 length, 1513 struct ieee80211_network *network, 1514 struct ieee80211_rx_stats *stats) 1515 { 1516 u8 i; 1517 short offset; 1518 u16 tmp_htcap_len = 0; 1519 u16 tmp_htinfo_len = 0; 1520 u16 ht_realtek_agg_len = 0; 1521 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1522 // u16 broadcom_len = 0; 1523 #ifdef CONFIG_IEEE80211_DEBUG 1524 char rates_str[64]; 1525 char *p; 1526 #endif 1527 1528 while (length >= sizeof(*info_element)) { 1529 if (sizeof(*info_element) + info_element->len > length) { 1530 IEEE80211_DEBUG_MGMT("Info elem: parse failed: " 1531 "info_element->len + 2 > left : " 1532 "info_element->len+2=%zd left=%d, id=%d.\n", 1533 info_element->len + 1534 sizeof(*info_element), 1535 length, info_element->id); 1536 /* We stop processing but don't return an error here 1537 * because some misbehaviour APs break this rule. ie. 1538 * Orinoco AP1000. */ 1539 break; 1540 } 1541 1542 switch (info_element->id) { 1543 case MFIE_TYPE_SSID: 1544 if (ieee80211_is_empty_essid(info_element->data, 1545 info_element->len)) { 1546 network->flags |= NETWORK_EMPTY_ESSID; 1547 break; 1548 } 1549 1550 network->ssid_len = min(info_element->len, 1551 (u8)IW_ESSID_MAX_SIZE); 1552 memcpy(network->ssid, info_element->data, network->ssid_len); 1553 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1554 memset(network->ssid + network->ssid_len, 0, 1555 IW_ESSID_MAX_SIZE - network->ssid_len); 1556 1557 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", 1558 network->ssid, network->ssid_len); 1559 break; 1560 1561 case MFIE_TYPE_RATES: 1562 #ifdef CONFIG_IEEE80211_DEBUG 1563 p = rates_str; 1564 #endif 1565 network->rates_len = min(info_element->len, 1566 MAX_RATES_LENGTH); 1567 for (i = 0; i < network->rates_len; i++) { 1568 network->rates[i] = info_element->data[i]; 1569 #ifdef CONFIG_IEEE80211_DEBUG 1570 p += scnprintf(p, sizeof(rates_str) - 1571 (p - rates_str), "%02X ", 1572 network->rates[i]); 1573 #endif 1574 if (ieee80211_is_ofdm_rate 1575 (info_element->data[i])) { 1576 network->flags |= NETWORK_HAS_OFDM; 1577 if (info_element->data[i] & 1578 IEEE80211_BASIC_RATE_MASK) 1579 network->flags &= 1580 ~NETWORK_HAS_CCK; 1581 } 1582 } 1583 1584 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", 1585 rates_str, network->rates_len); 1586 break; 1587 1588 case MFIE_TYPE_RATES_EX: 1589 #ifdef CONFIG_IEEE80211_DEBUG 1590 p = rates_str; 1591 #endif 1592 network->rates_ex_len = min(info_element->len, 1593 MAX_RATES_EX_LENGTH); 1594 for (i = 0; i < network->rates_ex_len; i++) { 1595 network->rates_ex[i] = info_element->data[i]; 1596 #ifdef CONFIG_IEEE80211_DEBUG 1597 p += scnprintf(p, sizeof(rates_str) - 1598 (p - rates_str), "%02X ", 1599 network->rates_ex[i]); 1600 #endif 1601 if (ieee80211_is_ofdm_rate 1602 (info_element->data[i])) { 1603 network->flags |= NETWORK_HAS_OFDM; 1604 if (info_element->data[i] & 1605 IEEE80211_BASIC_RATE_MASK) 1606 network->flags &= 1607 ~NETWORK_HAS_CCK; 1608 } 1609 } 1610 1611 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1612 rates_str, network->rates_ex_len); 1613 break; 1614 1615 case MFIE_TYPE_DS_SET: 1616 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", 1617 info_element->data[0]); 1618 network->channel = info_element->data[0]; 1619 break; 1620 1621 case MFIE_TYPE_FH_SET: 1622 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); 1623 break; 1624 1625 case MFIE_TYPE_CF_SET: 1626 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); 1627 break; 1628 1629 case MFIE_TYPE_TIM: 1630 if (info_element->len < 4) 1631 break; 1632 1633 network->tim.tim_count = info_element->data[0]; 1634 network->tim.tim_period = info_element->data[1]; 1635 1636 network->dtim_period = info_element->data[1]; 1637 if (ieee->state != IEEE80211_LINKED) 1638 break; 1639 1640 network->last_dtim_sta_time[0] = stats->mac_time[0]; 1641 network->last_dtim_sta_time[1] = stats->mac_time[1]; 1642 1643 network->dtim_data = IEEE80211_DTIM_VALID; 1644 1645 if (info_element->data[0] != 0) 1646 break; 1647 1648 if (info_element->data[2] & 1) 1649 network->dtim_data |= IEEE80211_DTIM_MBCAST; 1650 1651 offset = (info_element->data[2] >> 1) * 2; 1652 1653 if (ieee->assoc_id < 8 * offset || 1654 ieee->assoc_id > 8 * (offset + info_element->len - 3)) 1655 1656 break; 1657 1658 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ; 1659 1660 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8))) 1661 network->dtim_data |= IEEE80211_DTIM_UCAST; 1662 1663 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); 1664 break; 1665 1666 case MFIE_TYPE_ERP: 1667 network->erp_value = info_element->data[0]; 1668 network->flags |= NETWORK_HAS_ERP_VALUE; 1669 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", 1670 network->erp_value); 1671 break; 1672 case MFIE_TYPE_IBSS_SET: 1673 network->atim_window = info_element->data[0]; 1674 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", 1675 network->atim_window); 1676 break; 1677 1678 case MFIE_TYPE_CHALLENGE: 1679 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); 1680 break; 1681 1682 case MFIE_TYPE_GENERIC: 1683 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", 1684 info_element->len); 1685 if (!ieee80211_parse_qos_info_param_IE(info_element, 1686 network)) 1687 break; 1688 1689 if (info_element->len >= 4 && 1690 info_element->data[0] == 0x00 && 1691 info_element->data[1] == 0x50 && 1692 info_element->data[2] == 0xf2 && 1693 info_element->data[3] == 0x01) { 1694 network->wpa_ie_len = min(info_element->len + 2, 1695 MAX_WPA_IE_LEN); 1696 memcpy(network->wpa_ie, info_element, 1697 network->wpa_ie_len); 1698 break; 1699 } 1700 1701 #ifdef THOMAS_TURBO 1702 if (info_element->len == 7 && 1703 info_element->data[0] == 0x00 && 1704 info_element->data[1] == 0xe0 && 1705 info_element->data[2] == 0x4c && 1706 info_element->data[3] == 0x01 && 1707 info_element->data[4] == 0x02) { 1708 network->Turbo_Enable = 1; 1709 } 1710 #endif 1711 1712 //for HTcap and HTinfo parameters 1713 if (tmp_htcap_len == 0) { 1714 if (info_element->len >= 4 && 1715 info_element->data[0] == 0x00 && 1716 info_element->data[1] == 0x90 && 1717 info_element->data[2] == 0x4c && 1718 info_element->data[3] == 0x033){ 1719 1720 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1721 if (tmp_htcap_len != 0) { 1722 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1723 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1724 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1725 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1726 } 1727 } 1728 if (tmp_htcap_len != 0) 1729 network->bssht.bdSupportHT = true; 1730 else 1731 network->bssht.bdSupportHT = false; 1732 } 1733 1734 1735 if (tmp_htinfo_len == 0) { 1736 if (info_element->len >= 4 && 1737 info_element->data[0] == 0x00 && 1738 info_element->data[1] == 0x90 && 1739 info_element->data[2] == 0x4c && 1740 info_element->data[3] == 0x034){ 1741 1742 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1743 if (tmp_htinfo_len != 0) { 1744 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1745 if (tmp_htinfo_len) { 1746 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1747 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1748 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1749 } 1750 1751 } 1752 1753 } 1754 } 1755 1756 if (ieee->aggregation) { 1757 if (network->bssht.bdSupportHT) { 1758 if (info_element->len >= 4 && 1759 info_element->data[0] == 0x00 && 1760 info_element->data[1] == 0xe0 && 1761 info_element->data[2] == 0x4c && 1762 info_element->data[3] == 0x02){ 1763 1764 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN); 1765 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len); 1766 1767 } 1768 if (ht_realtek_agg_len >= 5) { 1769 network->bssht.bdRT2RTAggregation = true; 1770 1771 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02)) 1772 network->bssht.bdRT2RTLongSlotTime = true; 1773 } 1774 } 1775 1776 } 1777 1778 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0) 1779 { 1780 if ((info_element->len >= 3 && 1781 info_element->data[0] == 0x00 && 1782 info_element->data[1] == 0x05 && 1783 info_element->data[2] == 0xb5) || 1784 (info_element->len >= 3 && 1785 info_element->data[0] == 0x00 && 1786 info_element->data[1] == 0x0a && 1787 info_element->data[2] == 0xf7) || 1788 (info_element->len >= 3 && 1789 info_element->data[0] == 0x00 && 1790 info_element->data[1] == 0x10 && 1791 info_element->data[2] == 0x18)){ 1792 1793 network->broadcom_cap_exist = true; 1794 1795 } 1796 } 1797 if (info_element->len >= 3 && 1798 info_element->data[0] == 0x00 && 1799 info_element->data[1] == 0x0c && 1800 info_element->data[2] == 0x43) { 1801 network->ralink_cap_exist = true; 1802 } else 1803 network->ralink_cap_exist = false; 1804 //added by amy for atheros AP 1805 if ((info_element->len >= 3 && 1806 info_element->data[0] == 0x00 && 1807 info_element->data[1] == 0x03 && 1808 info_element->data[2] == 0x7f) || 1809 (info_element->len >= 3 && 1810 info_element->data[0] == 0x00 && 1811 info_element->data[1] == 0x13 && 1812 info_element->data[2] == 0x74)) { 1813 netdev_dbg(ieee->dev, "========> Atheros AP exists\n"); 1814 network->atheros_cap_exist = true; 1815 } else 1816 network->atheros_cap_exist = false; 1817 1818 if (info_element->len >= 3 && 1819 info_element->data[0] == 0x00 && 1820 info_element->data[1] == 0x40 && 1821 info_element->data[2] == 0x96) { 1822 network->cisco_cap_exist = true; 1823 } else 1824 network->cisco_cap_exist = false; 1825 //added by amy for LEAP of cisco 1826 if (info_element->len > 4 && 1827 info_element->data[0] == 0x00 && 1828 info_element->data[1] == 0x40 && 1829 info_element->data[2] == 0x96 && 1830 info_element->data[3] == 0x01) { 1831 if (info_element->len == 6) { 1832 memcpy(network->CcxRmState, &info_element[4], 2); 1833 if (network->CcxRmState[0] != 0) 1834 network->bCcxRmEnable = true; 1835 else 1836 network->bCcxRmEnable = false; 1837 // 1838 // CCXv4 Table 59-1 MBSSID Masks. 1839 // 1840 network->MBssidMask = network->CcxRmState[1] & 0x07; 1841 if (network->MBssidMask != 0) { 1842 network->bMBssidValid = true; 1843 network->MBssidMask = 0xff << (network->MBssidMask); 1844 ether_addr_copy(network->MBssid, network->bssid); 1845 network->MBssid[5] &= network->MBssidMask; 1846 } else { 1847 network->bMBssidValid = false; 1848 } 1849 } else { 1850 network->bCcxRmEnable = false; 1851 } 1852 } 1853 if (info_element->len > 4 && 1854 info_element->data[0] == 0x00 && 1855 info_element->data[1] == 0x40 && 1856 info_element->data[2] == 0x96 && 1857 info_element->data[3] == 0x03) { 1858 if (info_element->len == 5) { 1859 network->bWithCcxVerNum = true; 1860 network->BssCcxVerNumber = info_element->data[4]; 1861 } else { 1862 network->bWithCcxVerNum = false; 1863 network->BssCcxVerNumber = 0; 1864 } 1865 } 1866 break; 1867 1868 case MFIE_TYPE_RSN: 1869 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", 1870 info_element->len); 1871 network->rsn_ie_len = min(info_element->len + 2, 1872 MAX_WPA_IE_LEN); 1873 memcpy(network->rsn_ie, info_element, 1874 network->rsn_ie_len); 1875 break; 1876 1877 //HT related element. 1878 case MFIE_TYPE_HT_CAP: 1879 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n", 1880 info_element->len); 1881 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1882 if (tmp_htcap_len != 0) { 1883 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1884 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1885 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1886 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1887 1888 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT() 1889 // windows driver will update WMM parameters each beacon received once connected 1890 // Linux driver is a bit different. 1891 network->bssht.bdSupportHT = true; 1892 } else 1893 network->bssht.bdSupportHT = false; 1894 break; 1895 1896 1897 case MFIE_TYPE_HT_INFO: 1898 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n", 1899 info_element->len); 1900 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1901 if (tmp_htinfo_len) { 1902 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; 1903 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1904 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1905 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1906 } 1907 break; 1908 1909 case MFIE_TYPE_AIRONET: 1910 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n", 1911 info_element->len); 1912 if (info_element->len > IE_CISCO_FLAG_POSITION) { 1913 network->bWithAironetIE = true; 1914 1915 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23): 1916 // "A Cisco access point advertises support for CKIP in beacon and probe response packets, 1917 // by adding an Aironet element and setting one or both of the CKIP negotiation bits." 1918 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) || 1919 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) { 1920 network->bCkipSupported = true; 1921 } else { 1922 network->bCkipSupported = false; 1923 } 1924 } else { 1925 network->bWithAironetIE = false; 1926 network->bCkipSupported = false; 1927 } 1928 break; 1929 case MFIE_TYPE_QOS_PARAMETER: 1930 netdev_err(ieee->dev, 1931 "QoS Error need to parse QOS_PARAMETER IE\n"); 1932 break; 1933 1934 case MFIE_TYPE_COUNTRY: 1935 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", 1936 info_element->len); 1937 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP 1938 break; 1939 /* TODO */ 1940 default: 1941 IEEE80211_DEBUG_MGMT 1942 ("Unsupported info element: %s (%d)\n", 1943 get_info_element_string(info_element->id), 1944 info_element->id); 1945 break; 1946 } 1947 1948 length -= sizeof(*info_element) + info_element->len; 1949 info_element = 1950 (struct ieee80211_info_element *)&info_element-> 1951 data[info_element->len]; 1952 } 1953 1954 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 1955 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) { 1956 network->unknown_cap_exist = true; 1957 } else { 1958 network->unknown_cap_exist = false; 1959 } 1960 return 0; 1961 } 1962 1963 /* 0-100 index */ 1964 static long ieee80211_translate_todbm(u8 signal_strength_index) 1965 { 1966 long signal_power; // in dBm. 1967 1968 // Translate to dBm (x=0.5y-95). 1969 signal_power = (long)((signal_strength_index + 1) >> 1); 1970 signal_power -= 95; 1971 1972 return signal_power; 1973 } 1974 1975 static inline int ieee80211_network_init( 1976 struct ieee80211_device *ieee, 1977 struct ieee80211_probe_response *beacon, 1978 struct ieee80211_network *network, 1979 struct ieee80211_rx_stats *stats) 1980 { 1981 #ifdef CONFIG_IEEE80211_DEBUG 1982 //char rates_str[64]; 1983 //char *p; 1984 #endif 1985 1986 network->qos_data.active = 0; 1987 network->qos_data.supported = 0; 1988 network->qos_data.param_count = 0; 1989 network->qos_data.old_param_count = 0; 1990 1991 /* Pull out fixed field data */ 1992 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); 1993 network->capability = le16_to_cpu(beacon->capability); 1994 network->last_scanned = jiffies; 1995 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); 1996 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); 1997 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 1998 /* Where to pull this? beacon->listen_interval;*/ 1999 network->listen_interval = 0x0A; 2000 network->rates_len = network->rates_ex_len = 0; 2001 network->last_associate = 0; 2002 network->ssid_len = 0; 2003 network->flags = 0; 2004 network->atim_window = 0; 2005 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2006 0x3 : 0x0; 2007 network->berp_info_valid = false; 2008 network->broadcom_cap_exist = false; 2009 network->ralink_cap_exist = false; 2010 network->atheros_cap_exist = false; 2011 network->cisco_cap_exist = false; 2012 network->unknown_cap_exist = false; 2013 #ifdef THOMAS_TURBO 2014 network->Turbo_Enable = 0; 2015 #endif 2016 network->CountryIeLen = 0; 2017 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2018 //Initialize HT parameters 2019 //ieee80211_ht_initialize(&network->bssht); 2020 HTInitializeBssDesc(&network->bssht); 2021 if (stats->freq == IEEE80211_52GHZ_BAND) { 2022 /* for A band (No DS info) */ 2023 network->channel = stats->received_channel; 2024 } else 2025 network->flags |= NETWORK_HAS_CCK; 2026 2027 network->wpa_ie_len = 0; 2028 network->rsn_ie_len = 0; 2029 2030 if (ieee80211_parse_info_param 2031 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats)) 2032 return 1; 2033 2034 network->mode = 0; 2035 if (stats->freq == IEEE80211_52GHZ_BAND) 2036 network->mode = IEEE_A; 2037 else { 2038 if (network->flags & NETWORK_HAS_OFDM) 2039 network->mode |= IEEE_G; 2040 if (network->flags & NETWORK_HAS_CCK) 2041 network->mode |= IEEE_B; 2042 } 2043 2044 if (network->mode == 0) { 2045 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' " 2046 "network.\n", 2047 escape_essid(network->ssid, 2048 network->ssid_len), 2049 network->bssid); 2050 return 1; 2051 } 2052 2053 if (network->bssht.bdSupportHT) { 2054 if (network->mode == IEEE_A) 2055 network->mode = IEEE_N_5G; 2056 else if (network->mode & (IEEE_G | IEEE_B)) 2057 network->mode = IEEE_N_24G; 2058 } 2059 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) 2060 network->flags |= NETWORK_EMPTY_ESSID; 2061 2062 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2063 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25; 2064 2065 memcpy(&network->stats, stats, sizeof(network->stats)); 2066 2067 return 0; 2068 } 2069 2070 static inline int is_same_network(struct ieee80211_network *src, 2071 struct ieee80211_network *dst, struct ieee80211_device *ieee) 2072 { 2073 /* A network is only a duplicate if the channel, BSSID, ESSID 2074 * and the capability field (in particular IBSS and BSS) all match. 2075 * We treat all <hidden> with the same BSSID and channel 2076 * as one network */ 2077 return //((src->ssid_len == dst->ssid_len) && 2078 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2079 (src->channel == dst->channel) && 2080 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2081 //!memcmp(src->ssid, dst->ssid, src->ssid_len) && 2082 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2083 ((src->capability & WLAN_CAPABILITY_IBSS) == 2084 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2085 ((src->capability & WLAN_CAPABILITY_BSS) == 2086 (dst->capability & WLAN_CAPABILITY_BSS))); 2087 } 2088 2089 static inline void update_network(struct ieee80211_network *dst, 2090 struct ieee80211_network *src) 2091 { 2092 int qos_active; 2093 u8 old_param; 2094 2095 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); 2096 dst->capability = src->capability; 2097 memcpy(dst->rates, src->rates, src->rates_len); 2098 dst->rates_len = src->rates_len; 2099 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2100 dst->rates_ex_len = src->rates_ex_len; 2101 if (src->ssid_len > 0) { 2102 memset(dst->ssid, 0, dst->ssid_len); 2103 dst->ssid_len = src->ssid_len; 2104 memcpy(dst->ssid, src->ssid, src->ssid_len); 2105 } 2106 dst->mode = src->mode; 2107 dst->flags = src->flags; 2108 dst->time_stamp[0] = src->time_stamp[0]; 2109 dst->time_stamp[1] = src->time_stamp[1]; 2110 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2111 dst->erp_value = src->erp_value; 2112 dst->berp_info_valid = src->berp_info_valid = true; 2113 } 2114 dst->beacon_interval = src->beacon_interval; 2115 dst->listen_interval = src->listen_interval; 2116 dst->atim_window = src->atim_window; 2117 dst->dtim_period = src->dtim_period; 2118 dst->dtim_data = src->dtim_data; 2119 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; 2120 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; 2121 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters)); 2122 2123 dst->bssht.bdSupportHT = src->bssht.bdSupportHT; 2124 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; 2125 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen; 2126 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen); 2127 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen; 2128 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen); 2129 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; 2130 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; 2131 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2132 dst->ralink_cap_exist = src->ralink_cap_exist; 2133 dst->atheros_cap_exist = src->atheros_cap_exist; 2134 dst->cisco_cap_exist = src->cisco_cap_exist; 2135 dst->unknown_cap_exist = src->unknown_cap_exist; 2136 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2137 dst->wpa_ie_len = src->wpa_ie_len; 2138 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2139 dst->rsn_ie_len = src->rsn_ie_len; 2140 2141 dst->last_scanned = jiffies; 2142 /* qos related parameters */ 2143 //qos_active = src->qos_data.active; 2144 qos_active = dst->qos_data.active; 2145 //old_param = dst->qos_data.old_param_count; 2146 old_param = dst->qos_data.param_count; 2147 if (dst->flags & NETWORK_HAS_QOS_MASK) 2148 memcpy(&dst->qos_data, &src->qos_data, 2149 sizeof(struct ieee80211_qos_data)); 2150 else { 2151 dst->qos_data.supported = src->qos_data.supported; 2152 dst->qos_data.param_count = src->qos_data.param_count; 2153 } 2154 2155 if (dst->qos_data.supported == 1) { 2156 dst->QoS_Enable = 1; 2157 if (dst->ssid_len) 2158 IEEE80211_DEBUG_QOS 2159 ("QoS the network %s is QoS supported\n", 2160 dst->ssid); 2161 else 2162 IEEE80211_DEBUG_QOS 2163 ("QoS the network is QoS supported\n"); 2164 } 2165 dst->qos_data.active = qos_active; 2166 dst->qos_data.old_param_count = old_param; 2167 2168 /* dst->last_associate is not overwritten */ 2169 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. 2170 if (src->wmm_param[0].aci_aifsn || \ 2171 src->wmm_param[1].aci_aifsn || \ 2172 src->wmm_param[2].aci_aifsn || \ 2173 src->wmm_param[3].aci_aifsn) { 2174 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2175 } 2176 //dst->QoS_Enable = src->QoS_Enable; 2177 #ifdef THOMAS_TURBO 2178 dst->Turbo_Enable = src->Turbo_Enable; 2179 #endif 2180 2181 dst->CountryIeLen = src->CountryIeLen; 2182 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2183 2184 //added by amy for LEAP 2185 dst->bWithAironetIE = src->bWithAironetIE; 2186 dst->bCkipSupported = src->bCkipSupported; 2187 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2188 dst->bCcxRmEnable = src->bCcxRmEnable; 2189 dst->MBssidMask = src->MBssidMask; 2190 dst->bMBssidValid = src->bMBssidValid; 2191 memcpy(dst->MBssid, src->MBssid, 6); 2192 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2193 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2194 2195 } 2196 2197 static inline int is_beacon(__le16 fc) 2198 { 2199 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); 2200 } 2201 2202 static inline void ieee80211_process_probe_response( 2203 struct ieee80211_device *ieee, 2204 struct ieee80211_probe_response *beacon, 2205 struct ieee80211_rx_stats *stats) 2206 { 2207 struct ieee80211_network *network; 2208 struct ieee80211_network *target; 2209 struct ieee80211_network *oldest = NULL; 2210 #ifdef CONFIG_IEEE80211_DEBUG 2211 struct ieee80211_info_element *info_element = &beacon->info_element[0]; 2212 #endif 2213 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)); 2214 unsigned long flags; 2215 short renew; 2216 u16 capability; 2217 //u8 wmm_info; 2218 2219 network = kzalloc(sizeof(*network), GFP_ATOMIC); 2220 if (!network) 2221 goto out; 2222 2223 capability = le16_to_cpu(beacon->capability); 2224 IEEE80211_DEBUG_SCAN( 2225 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2226 escape_essid(info_element->data, info_element->len), 2227 beacon->header.addr3, 2228 (capability & BIT(0xf)) ? '1' : '0', 2229 (capability & BIT(0xe)) ? '1' : '0', 2230 (capability & BIT(0xd)) ? '1' : '0', 2231 (capability & BIT(0xc)) ? '1' : '0', 2232 (capability & BIT(0xb)) ? '1' : '0', 2233 (capability & BIT(0xa)) ? '1' : '0', 2234 (capability & BIT(0x9)) ? '1' : '0', 2235 (capability & BIT(0x8)) ? '1' : '0', 2236 (capability & BIT(0x7)) ? '1' : '0', 2237 (capability & BIT(0x6)) ? '1' : '0', 2238 (capability & BIT(0x5)) ? '1' : '0', 2239 (capability & BIT(0x4)) ? '1' : '0', 2240 (capability & BIT(0x3)) ? '1' : '0', 2241 (capability & BIT(0x2)) ? '1' : '0', 2242 (capability & BIT(0x1)) ? '1' : '0', 2243 (capability & BIT(0x0)) ? '1' : '0'); 2244 2245 if (ieee80211_network_init(ieee, beacon, network, stats)) { 2246 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n", 2247 escape_essid(info_element->data, 2248 info_element->len), 2249 beacon->header.addr3, 2250 fc == IEEE80211_STYPE_PROBE_RESP ? 2251 "PROBE RESPONSE" : "BEACON"); 2252 goto out; 2253 } 2254 2255 // For Asus EeePc request, 2256 // (1) if wireless adapter receive get any 802.11d country code in AP beacon, 2257 // wireless adapter should follow the country code. 2258 // (2) If there is no any country code in beacon, 2259 // then wireless adapter should do active scan from ch1~11 and 2260 // passive scan from ch12~14 2261 2262 if (!is_legal_channel(ieee, network->channel)) 2263 goto out; 2264 if (ieee->bGlobalDomain) { 2265 if (fc == IEEE80211_STYPE_PROBE_RESP) { 2266 if (IS_COUNTRY_IE_VALID(ieee)) { 2267 // Case 1: Country code 2268 if (!is_legal_channel(ieee, network->channel)) { 2269 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel); 2270 goto out; 2271 } 2272 } else { 2273 // Case 2: No any country code. 2274 // Filter over channel ch12~14 2275 if (network->channel > 11) { 2276 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel); 2277 goto out; 2278 } 2279 } 2280 } else { 2281 if (IS_COUNTRY_IE_VALID(ieee)) { 2282 // Case 1: Country code 2283 if (!is_legal_channel(ieee, network->channel)) { 2284 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel); 2285 goto out; 2286 } 2287 } else { 2288 // Case 2: No any country code. 2289 // Filter over channel ch12~14 2290 if (network->channel > 14) { 2291 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel); 2292 goto out; 2293 } 2294 } 2295 } 2296 } 2297 2298 /* The network parsed correctly -- so now we scan our known networks 2299 * to see if we can find it in our list. 2300 * 2301 * NOTE: This search is definitely not optimized. Once its doing 2302 * the "right thing" we'll optimize it for efficiency if 2303 * necessary */ 2304 2305 /* Search for this entry in the list and update it if it is 2306 * already there. */ 2307 2308 spin_lock_irqsave(&ieee->lock, flags); 2309 2310 if (is_same_network(&ieee->current_network, network, ieee)) { 2311 update_network(&ieee->current_network, network); 2312 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G) 2313 && ieee->current_network.berp_info_valid){ 2314 if (ieee->current_network.erp_value & ERP_UseProtection) 2315 ieee->current_network.buseprotection = true; 2316 else 2317 ieee->current_network.buseprotection = false; 2318 } 2319 if (is_beacon(beacon->header.frame_ctl)) { 2320 if (ieee->state == IEEE80211_LINKED) 2321 ieee->LinkDetectInfo.NumRecvBcnInPeriod++; 2322 } else //hidden AP 2323 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags); 2324 } 2325 2326 list_for_each_entry(target, &ieee->network_list, list) { 2327 if (is_same_network(target, network, ieee)) 2328 break; 2329 if (!oldest || 2330 (target->last_scanned < oldest->last_scanned)) 2331 oldest = target; 2332 } 2333 2334 /* If we didn't find a match, then get a new network slot to initialize 2335 * with this beacon's information */ 2336 if (&target->list == &ieee->network_list) { 2337 if (list_empty(&ieee->network_free_list)) { 2338 /* If there are no more slots, expire the oldest */ 2339 list_del(&oldest->list); 2340 target = oldest; 2341 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from " 2342 "network list.\n", 2343 escape_essid(target->ssid, 2344 target->ssid_len), 2345 target->bssid); 2346 } else { 2347 /* Otherwise just pull from the free list */ 2348 target = list_entry(ieee->network_free_list.next, 2349 struct ieee80211_network, list); 2350 list_del(ieee->network_free_list.next); 2351 } 2352 2353 2354 #ifdef CONFIG_IEEE80211_DEBUG 2355 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n", 2356 escape_essid(network->ssid, 2357 network->ssid_len), 2358 network->bssid, 2359 fc == IEEE80211_STYPE_PROBE_RESP ? 2360 "PROBE RESPONSE" : "BEACON"); 2361 #endif 2362 memcpy(target, network, sizeof(*target)); 2363 list_add_tail(&target->list, &ieee->network_list); 2364 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2365 ieee80211_softmac_new_net(ieee, network); 2366 } else { 2367 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n", 2368 escape_essid(target->ssid, 2369 target->ssid_len), 2370 target->bssid, 2371 fc == IEEE80211_STYPE_PROBE_RESP ? 2372 "PROBE RESPONSE" : "BEACON"); 2373 2374 /* we have an entry and we are going to update it. But this entry may 2375 * be already expired. In this case we do the same as we found a new 2376 * net and call the new_net handler 2377 */ 2378 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); 2379 //YJ,add,080819,for hidden ap 2380 if (is_beacon(beacon->header.frame_ctl) == 0) 2381 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags); 2382 //if(strncmp(network->ssid, "linksys-c",9) == 0) 2383 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags); 2384 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ 2385 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\ 2386 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK)))) 2387 renew = 1; 2388 //YJ,add,080819,for hidden ap,end 2389 2390 update_network(target, network); 2391 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2392 ieee80211_softmac_new_net(ieee, network); 2393 } 2394 2395 spin_unlock_irqrestore(&ieee->lock, flags); 2396 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \ 2397 (ieee->state == IEEE80211_LINKED)) { 2398 if (ieee->handle_beacon) 2399 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network); 2400 } 2401 2402 out: 2403 kfree(network); 2404 } 2405 2406 void ieee80211_rx_mgt(struct ieee80211_device *ieee, 2407 struct rtl_80211_hdr_4addr *header, 2408 struct ieee80211_rx_stats *stats) 2409 { 2410 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { 2411 2412 case IEEE80211_STYPE_BEACON: 2413 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", 2414 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2415 IEEE80211_DEBUG_SCAN("Beacon\n"); 2416 ieee80211_process_probe_response( 2417 ieee, (struct ieee80211_probe_response *)header, stats); 2418 break; 2419 2420 case IEEE80211_STYPE_PROBE_RESP: 2421 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", 2422 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2423 IEEE80211_DEBUG_SCAN("Probe response\n"); 2424 ieee80211_process_probe_response( 2425 ieee, (struct ieee80211_probe_response *)header, stats); 2426 break; 2427 2428 } 2429 } 2430 EXPORT_SYMBOL(ieee80211_rx_mgt); 2431