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)) < 0) { 1126 netdev_dbg(ieee->dev, "decrypt frame error\n"); 1127 goto rx_dropped; 1128 } 1129 1130 1131 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1132 1133 /* skb: hdr + (possibly fragmented) plaintext payload */ 1134 // PR: FIXME: hostap has additional conditions in the "if" below: 1135 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1136 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1137 int flen; 1138 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); 1139 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); 1140 1141 if (!frag_skb) { 1142 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, 1143 "Rx cannot get skb from fragment " 1144 "cache (morefrag=%d seq=%u frag=%u)\n", 1145 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1146 WLAN_GET_SEQ_SEQ(sc), frag); 1147 goto rx_dropped; 1148 } 1149 flen = skb->len; 1150 if (frag != 0) 1151 flen -= hdrlen; 1152 1153 if (frag_skb->tail + flen > frag_skb->end) { 1154 netdev_warn(dev, "host decrypted and " 1155 "reassembled frame did not fit skb\n"); 1156 ieee80211_frag_cache_invalidate(ieee, hdr); 1157 goto rx_dropped; 1158 } 1159 1160 if (frag == 0) { 1161 /* copy first fragment (including full headers) into 1162 * beginning of the fragment cache skb */ 1163 skb_put_data(frag_skb, skb->data, flen); 1164 } else { 1165 /* append frame payload to the end of the fragment 1166 * cache skb */ 1167 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1168 } 1169 dev_kfree_skb_any(skb); 1170 skb = NULL; 1171 1172 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1173 /* more fragments expected - leave the skb in fragment 1174 * cache for now; it will be delivered to upper layers 1175 * after all fragments have been received */ 1176 goto rx_exit; 1177 } 1178 1179 /* this was the last fragment and the frame will be 1180 * delivered, so remove skb from fragment cache */ 1181 skb = frag_skb; 1182 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1183 ieee80211_frag_cache_invalidate(ieee, hdr); 1184 } 1185 1186 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1187 * encrypted/authenticated */ 1188 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1189 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1190 netdev_dbg(ieee->dev, "==>decrypt msdu error\n"); 1191 goto rx_dropped; 1192 } 1193 1194 //added by amy for AP roaming 1195 ieee->LinkDetectInfo.NumRecvDataInPeriod++; 1196 ieee->LinkDetectInfo.NumRxOkInPeriod++; 1197 1198 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1199 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { 1200 if (/*ieee->ieee802_1x &&*/ 1201 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1202 1203 #ifdef CONFIG_IEEE80211_DEBUG 1204 /* pass unencrypted EAPOL frames even if encryption is 1205 * configured */ 1206 struct eapol *eap = (struct eapol *)(skb->data + 1207 24); 1208 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1209 eap_get_type(eap->type)); 1210 #endif 1211 } else { 1212 IEEE80211_DEBUG_DROP( 1213 "encryption configured, but RX " 1214 "frame not encrypted (SA=%pM)\n", 1215 hdr->addr2); 1216 goto rx_dropped; 1217 } 1218 } 1219 1220 #ifdef CONFIG_IEEE80211_DEBUG 1221 if (crypt && !(fc & IEEE80211_FCTL_WEP) && 1222 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1223 struct eapol *eap = (struct eapol *)(skb->data + 1224 24); 1225 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1226 eap_get_type(eap->type)); 1227 } 1228 #endif 1229 1230 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && 1231 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1232 IEEE80211_DEBUG_DROP( 1233 "dropped unencrypted RX data " 1234 "frame from %pM" 1235 " (drop_unencrypted=1)\n", 1236 hdr->addr2); 1237 goto rx_dropped; 1238 } 1239 /* 1240 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1241 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); 1242 } 1243 */ 1244 //added by amy for reorder 1245 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1246 && !is_multicast_ether_addr(hdr->addr1)) { 1247 TID = Frame_QoSTID(skb->data); 1248 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1249 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true); 1250 if (TID != 0 && TID != 3) 1251 ieee->bis_any_nonbepkts = true; 1252 } 1253 //added by amy for reorder 1254 /* skb: hdr + (possible reassembled) full plaintext payload */ 1255 //ethertype = (payload[6] << 8) | payload[7]; 1256 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC); 1257 if (!rxb) 1258 goto rx_dropped; 1259 /* to parse amsdu packets */ 1260 /* qos data packets & reserved bit is 1 */ 1261 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { 1262 /* only to free rxb, and not submit the packets to upper layer */ 1263 for (i = 0; i < rxb->nr_subframes; i++) 1264 dev_kfree_skb(rxb->subframes[i]); 1265 1266 kfree(rxb); 1267 rxb = NULL; 1268 goto rx_dropped; 1269 } 1270 1271 //added by amy for reorder 1272 if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) { 1273 indicate_packets(ieee, rxb); 1274 kfree(rxb); 1275 rxb = NULL; 1276 1277 } else { 1278 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__); 1279 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); 1280 } 1281 #ifndef JOHN_NOCPY 1282 dev_kfree_skb(skb); 1283 #endif 1284 1285 rx_exit: 1286 #ifdef NOT_YET 1287 if (sta) 1288 hostap_handle_sta_release(sta); 1289 #endif 1290 return 1; 1291 1292 rx_dropped: 1293 kfree(rxb); 1294 rxb = NULL; 1295 stats->rx_dropped++; 1296 1297 /* Returning 0 indicates to caller that we have not handled the SKB-- 1298 * so it is still allocated and can be used again by underlying 1299 * hardware as a DMA target */ 1300 return 0; 1301 } 1302 EXPORT_SYMBOL(ieee80211_rx); 1303 1304 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 1305 1306 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1307 1308 /* 1309 * Make the structure we read from the beacon packet to have 1310 * the right values 1311 */ 1312 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element 1313 *info_element, int sub_type) 1314 { 1315 if (info_element->elementID != QOS_ELEMENT_ID) 1316 return -1; 1317 if (info_element->qui_subtype != sub_type) 1318 return -1; 1319 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1320 return -1; 1321 if (info_element->qui_type != QOS_OUI_TYPE) 1322 return -1; 1323 if (info_element->version != QOS_VERSION_1) 1324 return -1; 1325 1326 return 0; 1327 } 1328 1329 1330 /* 1331 * Parse a QoS parameter element 1332 */ 1333 static int ieee80211_read_qos_param_element( 1334 struct ieee80211_qos_parameter_info *element_param, 1335 struct ieee80211_info_element *info_element) 1336 { 1337 size_t size = sizeof(*element_param); 1338 1339 if (!element_param || !info_element || info_element->len != size - 2) 1340 return -1; 1341 1342 memcpy(element_param, info_element, size); 1343 return ieee80211_verify_qos_info(&element_param->info_element, 1344 QOS_OUI_PARAM_SUB_TYPE); 1345 } 1346 1347 /* 1348 * Parse a QoS information element 1349 */ 1350 static int ieee80211_read_qos_info_element( 1351 struct ieee80211_qos_information_element *element_info, 1352 struct ieee80211_info_element *info_element) 1353 { 1354 size_t size = sizeof(*element_info); 1355 1356 if (!element_info || !info_element || info_element->len != size - 2) 1357 return -1; 1358 1359 memcpy(element_info, info_element, size); 1360 return ieee80211_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE); 1361 } 1362 1363 1364 /* 1365 * Write QoS parameters from the ac parameters. 1366 */ 1367 static int ieee80211_qos_convert_ac_to_parameters( 1368 struct ieee80211_qos_parameter_info *param_elm, 1369 struct ieee80211_qos_parameters *qos_param) 1370 { 1371 int i; 1372 struct ieee80211_qos_ac_parameter *ac_params; 1373 u8 aci; 1374 //u8 cw_min; 1375 //u8 cw_max; 1376 1377 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1378 ac_params = &(param_elm->ac_params_record[i]); 1379 1380 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1381 1382 if (aci >= QOS_QUEUE_NUM) 1383 continue; 1384 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1385 1386 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1387 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci]; 1388 1389 qos_param->cw_min[aci] = 1390 cpu_to_le16(ac_params->ecw_min_max & 0x0F); 1391 1392 qos_param->cw_max[aci] = 1393 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4); 1394 1395 qos_param->flag[aci] = 1396 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1397 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1398 } 1399 return 0; 1400 } 1401 1402 /* 1403 * we have a generic data element which it may contain QoS information or 1404 * parameters element. check the information element length to decide 1405 * which type to read 1406 */ 1407 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element 1408 *info_element, 1409 struct ieee80211_network *network) 1410 { 1411 int rc = 0; 1412 struct ieee80211_qos_parameters *qos_param = NULL; 1413 struct ieee80211_qos_information_element qos_info_element; 1414 1415 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); 1416 1417 if (rc == 0) { 1418 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1419 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1420 } else { 1421 struct ieee80211_qos_parameter_info param_element; 1422 1423 rc = ieee80211_read_qos_param_element(¶m_element, 1424 info_element); 1425 if (rc == 0) { 1426 qos_param = &(network->qos_data.parameters); 1427 ieee80211_qos_convert_ac_to_parameters(¶m_element, 1428 qos_param); 1429 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1430 network->qos_data.param_count = 1431 param_element.info_element.ac_info & 0x0F; 1432 } 1433 } 1434 1435 if (rc == 0) { 1436 IEEE80211_DEBUG_QOS("QoS is supported\n"); 1437 network->qos_data.supported = 1; 1438 } 1439 return rc; 1440 } 1441 1442 #ifdef CONFIG_IEEE80211_DEBUG 1443 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x 1444 1445 static const char *get_info_element_string(u16 id) 1446 { 1447 switch (id) { 1448 MFIE_STRING(SSID); 1449 MFIE_STRING(RATES); 1450 MFIE_STRING(FH_SET); 1451 MFIE_STRING(DS_SET); 1452 MFIE_STRING(CF_SET); 1453 MFIE_STRING(TIM); 1454 MFIE_STRING(IBSS_SET); 1455 MFIE_STRING(COUNTRY); 1456 MFIE_STRING(HOP_PARAMS); 1457 MFIE_STRING(HOP_TABLE); 1458 MFIE_STRING(REQUEST); 1459 MFIE_STRING(CHALLENGE); 1460 MFIE_STRING(POWER_CONSTRAINT); 1461 MFIE_STRING(POWER_CAPABILITY); 1462 MFIE_STRING(TPC_REQUEST); 1463 MFIE_STRING(TPC_REPORT); 1464 MFIE_STRING(SUPP_CHANNELS); 1465 MFIE_STRING(CSA); 1466 MFIE_STRING(MEASURE_REQUEST); 1467 MFIE_STRING(MEASURE_REPORT); 1468 MFIE_STRING(QUIET); 1469 MFIE_STRING(IBSS_DFS); 1470 // MFIE_STRING(ERP_INFO); 1471 MFIE_STRING(RSN); 1472 MFIE_STRING(RATES_EX); 1473 MFIE_STRING(GENERIC); 1474 MFIE_STRING(QOS_PARAMETER); 1475 default: 1476 return "UNKNOWN"; 1477 } 1478 } 1479 #endif 1480 1481 static inline void ieee80211_extract_country_ie( 1482 struct ieee80211_device *ieee, 1483 struct ieee80211_info_element *info_element, 1484 struct ieee80211_network *network, 1485 u8 *addr2 1486 ) 1487 { 1488 if (IS_DOT11D_ENABLE(ieee)) { 1489 if (info_element->len != 0) { 1490 memcpy(network->CountryIeBuf, info_element->data, info_element->len); 1491 network->CountryIeLen = info_element->len; 1492 1493 if (!IS_COUNTRY_IE_VALID(ieee)) { 1494 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data); 1495 } 1496 } 1497 1498 // 1499 // 070305, rcnjko: I update country IE watch dog here because 1500 // some AP (e.g. Cisco 1242) don't include country IE in their 1501 // probe response frame. 1502 // 1503 if (IS_EQUAL_CIE_SRC(ieee, addr2)) 1504 UPDATE_CIE_WATCHDOG(ieee); 1505 } 1506 } 1507 1508 int ieee80211_parse_info_param(struct ieee80211_device *ieee, 1509 struct ieee80211_info_element *info_element, 1510 u16 length, 1511 struct ieee80211_network *network, 1512 struct ieee80211_rx_stats *stats) 1513 { 1514 u8 i; 1515 short offset; 1516 u16 tmp_htcap_len = 0; 1517 u16 tmp_htinfo_len = 0; 1518 u16 ht_realtek_agg_len = 0; 1519 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1520 // u16 broadcom_len = 0; 1521 #ifdef CONFIG_IEEE80211_DEBUG 1522 char rates_str[64]; 1523 char *p; 1524 #endif 1525 1526 while (length >= sizeof(*info_element)) { 1527 if (sizeof(*info_element) + info_element->len > length) { 1528 IEEE80211_DEBUG_MGMT("Info elem: parse failed: " 1529 "info_element->len + 2 > left : " 1530 "info_element->len+2=%zd left=%d, id=%d.\n", 1531 info_element->len + 1532 sizeof(*info_element), 1533 length, info_element->id); 1534 /* We stop processing but don't return an error here 1535 * because some misbehaviour APs break this rule. ie. 1536 * Orinoco AP1000. */ 1537 break; 1538 } 1539 1540 switch (info_element->id) { 1541 case MFIE_TYPE_SSID: 1542 if (ieee80211_is_empty_essid(info_element->data, 1543 info_element->len)) { 1544 network->flags |= NETWORK_EMPTY_ESSID; 1545 break; 1546 } 1547 1548 network->ssid_len = min(info_element->len, 1549 (u8)IW_ESSID_MAX_SIZE); 1550 memcpy(network->ssid, info_element->data, network->ssid_len); 1551 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1552 memset(network->ssid + network->ssid_len, 0, 1553 IW_ESSID_MAX_SIZE - network->ssid_len); 1554 1555 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", 1556 network->ssid, network->ssid_len); 1557 break; 1558 1559 case MFIE_TYPE_RATES: 1560 #ifdef CONFIG_IEEE80211_DEBUG 1561 p = rates_str; 1562 #endif 1563 network->rates_len = min(info_element->len, 1564 MAX_RATES_LENGTH); 1565 for (i = 0; i < network->rates_len; i++) { 1566 network->rates[i] = info_element->data[i]; 1567 #ifdef CONFIG_IEEE80211_DEBUG 1568 p += scnprintf(p, sizeof(rates_str) - 1569 (p - rates_str), "%02X ", 1570 network->rates[i]); 1571 #endif 1572 if (ieee80211_is_ofdm_rate 1573 (info_element->data[i])) { 1574 network->flags |= NETWORK_HAS_OFDM; 1575 if (info_element->data[i] & 1576 IEEE80211_BASIC_RATE_MASK) 1577 network->flags &= 1578 ~NETWORK_HAS_CCK; 1579 } 1580 } 1581 1582 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", 1583 rates_str, network->rates_len); 1584 break; 1585 1586 case MFIE_TYPE_RATES_EX: 1587 #ifdef CONFIG_IEEE80211_DEBUG 1588 p = rates_str; 1589 #endif 1590 network->rates_ex_len = min(info_element->len, 1591 MAX_RATES_EX_LENGTH); 1592 for (i = 0; i < network->rates_ex_len; i++) { 1593 network->rates_ex[i] = info_element->data[i]; 1594 #ifdef CONFIG_IEEE80211_DEBUG 1595 p += scnprintf(p, sizeof(rates_str) - 1596 (p - rates_str), "%02X ", 1597 network->rates_ex[i]); 1598 #endif 1599 if (ieee80211_is_ofdm_rate 1600 (info_element->data[i])) { 1601 network->flags |= NETWORK_HAS_OFDM; 1602 if (info_element->data[i] & 1603 IEEE80211_BASIC_RATE_MASK) 1604 network->flags &= 1605 ~NETWORK_HAS_CCK; 1606 } 1607 } 1608 1609 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1610 rates_str, network->rates_ex_len); 1611 break; 1612 1613 case MFIE_TYPE_DS_SET: 1614 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", 1615 info_element->data[0]); 1616 network->channel = info_element->data[0]; 1617 break; 1618 1619 case MFIE_TYPE_FH_SET: 1620 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); 1621 break; 1622 1623 case MFIE_TYPE_CF_SET: 1624 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); 1625 break; 1626 1627 case MFIE_TYPE_TIM: 1628 if (info_element->len < 4) 1629 break; 1630 1631 network->tim.tim_count = info_element->data[0]; 1632 network->tim.tim_period = info_element->data[1]; 1633 1634 network->dtim_period = info_element->data[1]; 1635 if (ieee->state != IEEE80211_LINKED) 1636 break; 1637 1638 network->last_dtim_sta_time[0] = stats->mac_time[0]; 1639 network->last_dtim_sta_time[1] = stats->mac_time[1]; 1640 1641 network->dtim_data = IEEE80211_DTIM_VALID; 1642 1643 if (info_element->data[0] != 0) 1644 break; 1645 1646 if (info_element->data[2] & 1) 1647 network->dtim_data |= IEEE80211_DTIM_MBCAST; 1648 1649 offset = (info_element->data[2] >> 1) * 2; 1650 1651 if (ieee->assoc_id < 8 * offset || 1652 ieee->assoc_id > 8 * (offset + info_element->len - 3)) 1653 1654 break; 1655 1656 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ; 1657 1658 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8))) 1659 network->dtim_data |= IEEE80211_DTIM_UCAST; 1660 1661 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); 1662 break; 1663 1664 case MFIE_TYPE_ERP: 1665 network->erp_value = info_element->data[0]; 1666 network->flags |= NETWORK_HAS_ERP_VALUE; 1667 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", 1668 network->erp_value); 1669 break; 1670 case MFIE_TYPE_IBSS_SET: 1671 network->atim_window = info_element->data[0]; 1672 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", 1673 network->atim_window); 1674 break; 1675 1676 case MFIE_TYPE_CHALLENGE: 1677 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); 1678 break; 1679 1680 case MFIE_TYPE_GENERIC: 1681 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", 1682 info_element->len); 1683 if (!ieee80211_parse_qos_info_param_IE(info_element, 1684 network)) 1685 break; 1686 1687 if (info_element->len >= 4 && 1688 info_element->data[0] == 0x00 && 1689 info_element->data[1] == 0x50 && 1690 info_element->data[2] == 0xf2 && 1691 info_element->data[3] == 0x01) { 1692 network->wpa_ie_len = min(info_element->len + 2, 1693 MAX_WPA_IE_LEN); 1694 memcpy(network->wpa_ie, info_element, 1695 network->wpa_ie_len); 1696 break; 1697 } 1698 1699 #ifdef THOMAS_TURBO 1700 if (info_element->len == 7 && 1701 info_element->data[0] == 0x00 && 1702 info_element->data[1] == 0xe0 && 1703 info_element->data[2] == 0x4c && 1704 info_element->data[3] == 0x01 && 1705 info_element->data[4] == 0x02) { 1706 network->Turbo_Enable = 1; 1707 } 1708 #endif 1709 1710 //for HTcap and HTinfo parameters 1711 if (tmp_htcap_len == 0) { 1712 if (info_element->len >= 4 && 1713 info_element->data[0] == 0x00 && 1714 info_element->data[1] == 0x90 && 1715 info_element->data[2] == 0x4c && 1716 info_element->data[3] == 0x033){ 1717 1718 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1719 if (tmp_htcap_len != 0) { 1720 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1721 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1722 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1723 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1724 } 1725 } 1726 if (tmp_htcap_len != 0) 1727 network->bssht.bdSupportHT = true; 1728 else 1729 network->bssht.bdSupportHT = false; 1730 } 1731 1732 1733 if (tmp_htinfo_len == 0) { 1734 if (info_element->len >= 4 && 1735 info_element->data[0] == 0x00 && 1736 info_element->data[1] == 0x90 && 1737 info_element->data[2] == 0x4c && 1738 info_element->data[3] == 0x034){ 1739 1740 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1741 if (tmp_htinfo_len != 0) { 1742 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1743 if (tmp_htinfo_len) { 1744 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1745 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1746 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1747 } 1748 1749 } 1750 1751 } 1752 } 1753 1754 if (ieee->aggregation) { 1755 if (network->bssht.bdSupportHT) { 1756 if (info_element->len >= 4 && 1757 info_element->data[0] == 0x00 && 1758 info_element->data[1] == 0xe0 && 1759 info_element->data[2] == 0x4c && 1760 info_element->data[3] == 0x02){ 1761 1762 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN); 1763 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len); 1764 1765 } 1766 if (ht_realtek_agg_len >= 5) { 1767 network->bssht.bdRT2RTAggregation = true; 1768 1769 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02)) 1770 network->bssht.bdRT2RTLongSlotTime = true; 1771 } 1772 } 1773 1774 } 1775 1776 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0) 1777 { 1778 if ((info_element->len >= 3 && 1779 info_element->data[0] == 0x00 && 1780 info_element->data[1] == 0x05 && 1781 info_element->data[2] == 0xb5) || 1782 (info_element->len >= 3 && 1783 info_element->data[0] == 0x00 && 1784 info_element->data[1] == 0x0a && 1785 info_element->data[2] == 0xf7) || 1786 (info_element->len >= 3 && 1787 info_element->data[0] == 0x00 && 1788 info_element->data[1] == 0x10 && 1789 info_element->data[2] == 0x18)){ 1790 1791 network->broadcom_cap_exist = true; 1792 1793 } 1794 } 1795 if (info_element->len >= 3 && 1796 info_element->data[0] == 0x00 && 1797 info_element->data[1] == 0x0c && 1798 info_element->data[2] == 0x43) { 1799 network->ralink_cap_exist = true; 1800 } else 1801 network->ralink_cap_exist = false; 1802 //added by amy for atheros AP 1803 if ((info_element->len >= 3 && 1804 info_element->data[0] == 0x00 && 1805 info_element->data[1] == 0x03 && 1806 info_element->data[2] == 0x7f) || 1807 (info_element->len >= 3 && 1808 info_element->data[0] == 0x00 && 1809 info_element->data[1] == 0x13 && 1810 info_element->data[2] == 0x74)) { 1811 netdev_dbg(ieee->dev, "========> Atheros AP exists\n"); 1812 network->atheros_cap_exist = true; 1813 } else 1814 network->atheros_cap_exist = false; 1815 1816 if (info_element->len >= 3 && 1817 info_element->data[0] == 0x00 && 1818 info_element->data[1] == 0x40 && 1819 info_element->data[2] == 0x96) { 1820 network->cisco_cap_exist = true; 1821 } else 1822 network->cisco_cap_exist = false; 1823 //added by amy for LEAP of cisco 1824 if (info_element->len > 4 && 1825 info_element->data[0] == 0x00 && 1826 info_element->data[1] == 0x40 && 1827 info_element->data[2] == 0x96 && 1828 info_element->data[3] == 0x01) { 1829 if (info_element->len == 6) { 1830 memcpy(network->CcxRmState, &info_element[4], 2); 1831 if (network->CcxRmState[0] != 0) 1832 network->bCcxRmEnable = true; 1833 else 1834 network->bCcxRmEnable = false; 1835 // 1836 // CCXv4 Table 59-1 MBSSID Masks. 1837 // 1838 network->MBssidMask = network->CcxRmState[1] & 0x07; 1839 if (network->MBssidMask != 0) { 1840 network->bMBssidValid = true; 1841 network->MBssidMask = 0xff << (network->MBssidMask); 1842 ether_addr_copy(network->MBssid, network->bssid); 1843 network->MBssid[5] &= network->MBssidMask; 1844 } else { 1845 network->bMBssidValid = false; 1846 } 1847 } else { 1848 network->bCcxRmEnable = false; 1849 } 1850 } 1851 if (info_element->len > 4 && 1852 info_element->data[0] == 0x00 && 1853 info_element->data[1] == 0x40 && 1854 info_element->data[2] == 0x96 && 1855 info_element->data[3] == 0x03) { 1856 if (info_element->len == 5) { 1857 network->bWithCcxVerNum = true; 1858 network->BssCcxVerNumber = info_element->data[4]; 1859 } else { 1860 network->bWithCcxVerNum = false; 1861 network->BssCcxVerNumber = 0; 1862 } 1863 } 1864 break; 1865 1866 case MFIE_TYPE_RSN: 1867 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", 1868 info_element->len); 1869 network->rsn_ie_len = min(info_element->len + 2, 1870 MAX_WPA_IE_LEN); 1871 memcpy(network->rsn_ie, info_element, 1872 network->rsn_ie_len); 1873 break; 1874 1875 //HT related element. 1876 case MFIE_TYPE_HT_CAP: 1877 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n", 1878 info_element->len); 1879 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1880 if (tmp_htcap_len != 0) { 1881 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1882 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1883 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1884 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1885 1886 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT() 1887 // windows driver will update WMM parameters each beacon received once connected 1888 // Linux driver is a bit different. 1889 network->bssht.bdSupportHT = true; 1890 } else 1891 network->bssht.bdSupportHT = false; 1892 break; 1893 1894 1895 case MFIE_TYPE_HT_INFO: 1896 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n", 1897 info_element->len); 1898 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1899 if (tmp_htinfo_len) { 1900 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; 1901 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1902 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1903 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1904 } 1905 break; 1906 1907 case MFIE_TYPE_AIRONET: 1908 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n", 1909 info_element->len); 1910 if (info_element->len > IE_CISCO_FLAG_POSITION) { 1911 network->bWithAironetIE = true; 1912 1913 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23): 1914 // "A Cisco access point advertises support for CKIP in beacon and probe response packets, 1915 // by adding an Aironet element and setting one or both of the CKIP negotiation bits." 1916 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) || 1917 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) { 1918 network->bCkipSupported = true; 1919 } else { 1920 network->bCkipSupported = false; 1921 } 1922 } else { 1923 network->bWithAironetIE = false; 1924 network->bCkipSupported = false; 1925 } 1926 break; 1927 case MFIE_TYPE_QOS_PARAMETER: 1928 netdev_err(ieee->dev, 1929 "QoS Error need to parse QOS_PARAMETER IE\n"); 1930 break; 1931 1932 case MFIE_TYPE_COUNTRY: 1933 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", 1934 info_element->len); 1935 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP 1936 break; 1937 /* TODO */ 1938 default: 1939 IEEE80211_DEBUG_MGMT 1940 ("Unsupported info element: %s (%d)\n", 1941 get_info_element_string(info_element->id), 1942 info_element->id); 1943 break; 1944 } 1945 1946 length -= sizeof(*info_element) + info_element->len; 1947 info_element = 1948 (struct ieee80211_info_element *)&info_element-> 1949 data[info_element->len]; 1950 } 1951 1952 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 1953 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) { 1954 network->unknown_cap_exist = true; 1955 } else { 1956 network->unknown_cap_exist = false; 1957 } 1958 return 0; 1959 } 1960 1961 /* 0-100 index */ 1962 static long ieee80211_translate_todbm(u8 signal_strength_index) 1963 { 1964 long signal_power; // in dBm. 1965 1966 // Translate to dBm (x=0.5y-95). 1967 signal_power = (long)((signal_strength_index + 1) >> 1); 1968 signal_power -= 95; 1969 1970 return signal_power; 1971 } 1972 1973 static inline int ieee80211_network_init( 1974 struct ieee80211_device *ieee, 1975 struct ieee80211_probe_response *beacon, 1976 struct ieee80211_network *network, 1977 struct ieee80211_rx_stats *stats) 1978 { 1979 #ifdef CONFIG_IEEE80211_DEBUG 1980 //char rates_str[64]; 1981 //char *p; 1982 #endif 1983 1984 network->qos_data.active = 0; 1985 network->qos_data.supported = 0; 1986 network->qos_data.param_count = 0; 1987 network->qos_data.old_param_count = 0; 1988 1989 /* Pull out fixed field data */ 1990 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); 1991 network->capability = le16_to_cpu(beacon->capability); 1992 network->last_scanned = jiffies; 1993 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); 1994 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); 1995 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 1996 /* Where to pull this? beacon->listen_interval;*/ 1997 network->listen_interval = 0x0A; 1998 network->rates_len = network->rates_ex_len = 0; 1999 network->last_associate = 0; 2000 network->ssid_len = 0; 2001 network->flags = 0; 2002 network->atim_window = 0; 2003 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2004 0x3 : 0x0; 2005 network->berp_info_valid = false; 2006 network->broadcom_cap_exist = false; 2007 network->ralink_cap_exist = false; 2008 network->atheros_cap_exist = false; 2009 network->cisco_cap_exist = false; 2010 network->unknown_cap_exist = false; 2011 #ifdef THOMAS_TURBO 2012 network->Turbo_Enable = 0; 2013 #endif 2014 network->CountryIeLen = 0; 2015 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2016 //Initialize HT parameters 2017 //ieee80211_ht_initialize(&network->bssht); 2018 HTInitializeBssDesc(&network->bssht); 2019 if (stats->freq == IEEE80211_52GHZ_BAND) { 2020 /* for A band (No DS info) */ 2021 network->channel = stats->received_channel; 2022 } else 2023 network->flags |= NETWORK_HAS_CCK; 2024 2025 network->wpa_ie_len = 0; 2026 network->rsn_ie_len = 0; 2027 2028 if (ieee80211_parse_info_param 2029 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats)) 2030 return 1; 2031 2032 network->mode = 0; 2033 if (stats->freq == IEEE80211_52GHZ_BAND) 2034 network->mode = IEEE_A; 2035 else { 2036 if (network->flags & NETWORK_HAS_OFDM) 2037 network->mode |= IEEE_G; 2038 if (network->flags & NETWORK_HAS_CCK) 2039 network->mode |= IEEE_B; 2040 } 2041 2042 if (network->mode == 0) { 2043 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' " 2044 "network.\n", 2045 escape_essid(network->ssid, 2046 network->ssid_len), 2047 network->bssid); 2048 return 1; 2049 } 2050 2051 if (network->bssht.bdSupportHT) { 2052 if (network->mode == IEEE_A) 2053 network->mode = IEEE_N_5G; 2054 else if (network->mode & (IEEE_G | IEEE_B)) 2055 network->mode = IEEE_N_24G; 2056 } 2057 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) 2058 network->flags |= NETWORK_EMPTY_ESSID; 2059 2060 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2061 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25; 2062 2063 memcpy(&network->stats, stats, sizeof(network->stats)); 2064 2065 return 0; 2066 } 2067 2068 static inline int is_same_network(struct ieee80211_network *src, 2069 struct ieee80211_network *dst, struct ieee80211_device *ieee) 2070 { 2071 /* A network is only a duplicate if the channel, BSSID, ESSID 2072 * and the capability field (in particular IBSS and BSS) all match. 2073 * We treat all <hidden> with the same BSSID and channel 2074 * as one network */ 2075 return //((src->ssid_len == dst->ssid_len) && 2076 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2077 (src->channel == dst->channel) && 2078 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2079 //!memcmp(src->ssid, dst->ssid, src->ssid_len) && 2080 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2081 ((src->capability & WLAN_CAPABILITY_IBSS) == 2082 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2083 ((src->capability & WLAN_CAPABILITY_BSS) == 2084 (dst->capability & WLAN_CAPABILITY_BSS))); 2085 } 2086 2087 static inline void update_network(struct ieee80211_network *dst, 2088 struct ieee80211_network *src) 2089 { 2090 int qos_active; 2091 u8 old_param; 2092 2093 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); 2094 dst->capability = src->capability; 2095 memcpy(dst->rates, src->rates, src->rates_len); 2096 dst->rates_len = src->rates_len; 2097 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2098 dst->rates_ex_len = src->rates_ex_len; 2099 if (src->ssid_len > 0) { 2100 memset(dst->ssid, 0, dst->ssid_len); 2101 dst->ssid_len = src->ssid_len; 2102 memcpy(dst->ssid, src->ssid, src->ssid_len); 2103 } 2104 dst->mode = src->mode; 2105 dst->flags = src->flags; 2106 dst->time_stamp[0] = src->time_stamp[0]; 2107 dst->time_stamp[1] = src->time_stamp[1]; 2108 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2109 dst->erp_value = src->erp_value; 2110 dst->berp_info_valid = src->berp_info_valid = true; 2111 } 2112 dst->beacon_interval = src->beacon_interval; 2113 dst->listen_interval = src->listen_interval; 2114 dst->atim_window = src->atim_window; 2115 dst->dtim_period = src->dtim_period; 2116 dst->dtim_data = src->dtim_data; 2117 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; 2118 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; 2119 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters)); 2120 2121 dst->bssht.bdSupportHT = src->bssht.bdSupportHT; 2122 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; 2123 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen; 2124 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen); 2125 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen; 2126 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen); 2127 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; 2128 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; 2129 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2130 dst->ralink_cap_exist = src->ralink_cap_exist; 2131 dst->atheros_cap_exist = src->atheros_cap_exist; 2132 dst->cisco_cap_exist = src->cisco_cap_exist; 2133 dst->unknown_cap_exist = src->unknown_cap_exist; 2134 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2135 dst->wpa_ie_len = src->wpa_ie_len; 2136 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2137 dst->rsn_ie_len = src->rsn_ie_len; 2138 2139 dst->last_scanned = jiffies; 2140 /* qos related parameters */ 2141 //qos_active = src->qos_data.active; 2142 qos_active = dst->qos_data.active; 2143 //old_param = dst->qos_data.old_param_count; 2144 old_param = dst->qos_data.param_count; 2145 if (dst->flags & NETWORK_HAS_QOS_MASK) 2146 memcpy(&dst->qos_data, &src->qos_data, 2147 sizeof(struct ieee80211_qos_data)); 2148 else { 2149 dst->qos_data.supported = src->qos_data.supported; 2150 dst->qos_data.param_count = src->qos_data.param_count; 2151 } 2152 2153 if (dst->qos_data.supported == 1) { 2154 dst->QoS_Enable = 1; 2155 if (dst->ssid_len) 2156 IEEE80211_DEBUG_QOS 2157 ("QoS the network %s is QoS supported\n", 2158 dst->ssid); 2159 else 2160 IEEE80211_DEBUG_QOS 2161 ("QoS the network is QoS supported\n"); 2162 } 2163 dst->qos_data.active = qos_active; 2164 dst->qos_data.old_param_count = old_param; 2165 2166 /* dst->last_associate is not overwritten */ 2167 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. 2168 if (src->wmm_param[0].aci_aifsn || \ 2169 src->wmm_param[1].aci_aifsn || \ 2170 src->wmm_param[2].aci_aifsn || \ 2171 src->wmm_param[3].aci_aifsn) { 2172 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2173 } 2174 //dst->QoS_Enable = src->QoS_Enable; 2175 #ifdef THOMAS_TURBO 2176 dst->Turbo_Enable = src->Turbo_Enable; 2177 #endif 2178 2179 dst->CountryIeLen = src->CountryIeLen; 2180 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2181 2182 //added by amy for LEAP 2183 dst->bWithAironetIE = src->bWithAironetIE; 2184 dst->bCkipSupported = src->bCkipSupported; 2185 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2186 dst->bCcxRmEnable = src->bCcxRmEnable; 2187 dst->MBssidMask = src->MBssidMask; 2188 dst->bMBssidValid = src->bMBssidValid; 2189 memcpy(dst->MBssid, src->MBssid, 6); 2190 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2191 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2192 2193 } 2194 2195 static inline int is_beacon(__le16 fc) 2196 { 2197 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); 2198 } 2199 2200 static inline void ieee80211_process_probe_response( 2201 struct ieee80211_device *ieee, 2202 struct ieee80211_probe_response *beacon, 2203 struct ieee80211_rx_stats *stats) 2204 { 2205 struct ieee80211_network *network; 2206 struct ieee80211_network *target; 2207 struct ieee80211_network *oldest = NULL; 2208 #ifdef CONFIG_IEEE80211_DEBUG 2209 struct ieee80211_info_element *info_element = &beacon->info_element[0]; 2210 #endif 2211 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)); 2212 unsigned long flags; 2213 short renew; 2214 u16 capability; 2215 //u8 wmm_info; 2216 2217 network = kzalloc(sizeof(*network), GFP_ATOMIC); 2218 if (!network) 2219 goto out; 2220 2221 capability = le16_to_cpu(beacon->capability); 2222 IEEE80211_DEBUG_SCAN( 2223 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2224 escape_essid(info_element->data, info_element->len), 2225 beacon->header.addr3, 2226 (capability & BIT(0xf)) ? '1' : '0', 2227 (capability & BIT(0xe)) ? '1' : '0', 2228 (capability & BIT(0xd)) ? '1' : '0', 2229 (capability & BIT(0xc)) ? '1' : '0', 2230 (capability & BIT(0xb)) ? '1' : '0', 2231 (capability & BIT(0xa)) ? '1' : '0', 2232 (capability & BIT(0x9)) ? '1' : '0', 2233 (capability & BIT(0x8)) ? '1' : '0', 2234 (capability & BIT(0x7)) ? '1' : '0', 2235 (capability & BIT(0x6)) ? '1' : '0', 2236 (capability & BIT(0x5)) ? '1' : '0', 2237 (capability & BIT(0x4)) ? '1' : '0', 2238 (capability & BIT(0x3)) ? '1' : '0', 2239 (capability & BIT(0x2)) ? '1' : '0', 2240 (capability & BIT(0x1)) ? '1' : '0', 2241 (capability & BIT(0x0)) ? '1' : '0'); 2242 2243 if (ieee80211_network_init(ieee, beacon, network, stats)) { 2244 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n", 2245 escape_essid(info_element->data, 2246 info_element->len), 2247 beacon->header.addr3, 2248 fc == IEEE80211_STYPE_PROBE_RESP ? 2249 "PROBE RESPONSE" : "BEACON"); 2250 goto out; 2251 } 2252 2253 // For Asus EeePc request, 2254 // (1) if wireless adapter receive get any 802.11d country code in AP beacon, 2255 // wireless adapter should follow the country code. 2256 // (2) If there is no any country code in beacon, 2257 // then wireless adapter should do active scan from ch1~11 and 2258 // passive scan from ch12~14 2259 2260 if (!is_legal_channel(ieee, network->channel)) 2261 goto out; 2262 if (ieee->bGlobalDomain) { 2263 if (fc == IEEE80211_STYPE_PROBE_RESP) { 2264 if (IS_COUNTRY_IE_VALID(ieee)) { 2265 // Case 1: Country code 2266 if (!is_legal_channel(ieee, network->channel)) { 2267 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel); 2268 goto out; 2269 } 2270 } else { 2271 // Case 2: No any country code. 2272 // Filter over channel ch12~14 2273 if (network->channel > 11) { 2274 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel); 2275 goto out; 2276 } 2277 } 2278 } else { 2279 if (IS_COUNTRY_IE_VALID(ieee)) { 2280 // Case 1: Country code 2281 if (!is_legal_channel(ieee, network->channel)) { 2282 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel); 2283 goto out; 2284 } 2285 } else { 2286 // Case 2: No any country code. 2287 // Filter over channel ch12~14 2288 if (network->channel > 14) { 2289 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel); 2290 goto out; 2291 } 2292 } 2293 } 2294 } 2295 2296 /* The network parsed correctly -- so now we scan our known networks 2297 * to see if we can find it in our list. 2298 * 2299 * NOTE: This search is definitely not optimized. Once its doing 2300 * the "right thing" we'll optimize it for efficiency if 2301 * necessary */ 2302 2303 /* Search for this entry in the list and update it if it is 2304 * already there. */ 2305 2306 spin_lock_irqsave(&ieee->lock, flags); 2307 2308 if (is_same_network(&ieee->current_network, network, ieee)) { 2309 update_network(&ieee->current_network, network); 2310 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G) 2311 && ieee->current_network.berp_info_valid){ 2312 if (ieee->current_network.erp_value & ERP_UseProtection) 2313 ieee->current_network.buseprotection = true; 2314 else 2315 ieee->current_network.buseprotection = false; 2316 } 2317 if (is_beacon(beacon->header.frame_ctl)) { 2318 if (ieee->state == IEEE80211_LINKED) 2319 ieee->LinkDetectInfo.NumRecvBcnInPeriod++; 2320 } else //hidden AP 2321 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags); 2322 } 2323 2324 list_for_each_entry(target, &ieee->network_list, list) { 2325 if (is_same_network(target, network, ieee)) 2326 break; 2327 if (!oldest || 2328 (target->last_scanned < oldest->last_scanned)) 2329 oldest = target; 2330 } 2331 2332 /* If we didn't find a match, then get a new network slot to initialize 2333 * with this beacon's information */ 2334 if (&target->list == &ieee->network_list) { 2335 if (list_empty(&ieee->network_free_list)) { 2336 /* If there are no more slots, expire the oldest */ 2337 list_del(&oldest->list); 2338 target = oldest; 2339 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from " 2340 "network list.\n", 2341 escape_essid(target->ssid, 2342 target->ssid_len), 2343 target->bssid); 2344 } else { 2345 /* Otherwise just pull from the free list */ 2346 target = list_entry(ieee->network_free_list.next, 2347 struct ieee80211_network, list); 2348 list_del(ieee->network_free_list.next); 2349 } 2350 2351 2352 #ifdef CONFIG_IEEE80211_DEBUG 2353 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n", 2354 escape_essid(network->ssid, 2355 network->ssid_len), 2356 network->bssid, 2357 fc == IEEE80211_STYPE_PROBE_RESP ? 2358 "PROBE RESPONSE" : "BEACON"); 2359 #endif 2360 memcpy(target, network, sizeof(*target)); 2361 list_add_tail(&target->list, &ieee->network_list); 2362 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2363 ieee80211_softmac_new_net(ieee, network); 2364 } else { 2365 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n", 2366 escape_essid(target->ssid, 2367 target->ssid_len), 2368 target->bssid, 2369 fc == IEEE80211_STYPE_PROBE_RESP ? 2370 "PROBE RESPONSE" : "BEACON"); 2371 2372 /* we have an entry and we are going to update it. But this entry may 2373 * be already expired. In this case we do the same as we found a new 2374 * net and call the new_net handler 2375 */ 2376 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); 2377 //YJ,add,080819,for hidden ap 2378 if (is_beacon(beacon->header.frame_ctl) == 0) 2379 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags); 2380 //if(strncmp(network->ssid, "linksys-c",9) == 0) 2381 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags); 2382 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ 2383 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\ 2384 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK)))) 2385 renew = 1; 2386 //YJ,add,080819,for hidden ap,end 2387 2388 update_network(target, network); 2389 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2390 ieee80211_softmac_new_net(ieee, network); 2391 } 2392 2393 spin_unlock_irqrestore(&ieee->lock, flags); 2394 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \ 2395 (ieee->state == IEEE80211_LINKED)) { 2396 if (ieee->handle_beacon) 2397 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network); 2398 } 2399 2400 out: 2401 kfree(network); 2402 } 2403 2404 void ieee80211_rx_mgt(struct ieee80211_device *ieee, 2405 struct rtl_80211_hdr_4addr *header, 2406 struct ieee80211_rx_stats *stats) 2407 { 2408 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { 2409 2410 case IEEE80211_STYPE_BEACON: 2411 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", 2412 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2413 IEEE80211_DEBUG_SCAN("Beacon\n"); 2414 ieee80211_process_probe_response( 2415 ieee, (struct ieee80211_probe_response *)header, stats); 2416 break; 2417 2418 case IEEE80211_STYPE_PROBE_RESP: 2419 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", 2420 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2421 IEEE80211_DEBUG_SCAN("Probe response\n"); 2422 ieee80211_process_probe_response( 2423 ieee, (struct ieee80211_probe_response *)header, stats); 2424 break; 2425 2426 } 2427 } 2428 EXPORT_SYMBOL(ieee80211_rx_mgt); 2429