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_KERNEL); 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 } 791 792 if (rx_stats->bContainHTC) { 793 LLCOffset += HTCLNG; 794 } 795 // Null packet, don't indicate it to upper layer 796 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/ 797 798 if (skb->len <= ChkLength) 799 return 0; 800 801 skb_pull(skb, LLCOffset); 802 803 if (!bIsAggregateFrame) { 804 rxb->nr_subframes = 1; 805 #ifdef JOHN_NOCPY 806 rxb->subframes[0] = skb; 807 #else 808 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC); 809 #endif 810 811 memcpy(rxb->src, src, ETH_ALEN); 812 memcpy(rxb->dst, dst, ETH_ALEN); 813 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len); 814 return 1; 815 } else { 816 rxb->nr_subframes = 0; 817 memcpy(rxb->src, src, ETH_ALEN); 818 memcpy(rxb->dst, dst, ETH_ALEN); 819 while (skb->len > ETHERNET_HEADER_SIZE) { 820 /* Offset 12 denote 2 mac address */ 821 nSubframe_Length = *((u16 *)(skb->data + 12)); 822 //==m==>change the length order 823 nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8); 824 825 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { 826 netdev_dbg(ieee->dev, "A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", 827 rxb->nr_subframes); 828 netdev_dbg(ieee->dev, "A-MSDU parse error!! Subframe Length: %d\n", nSubframe_Length); 829 netdev_dbg(ieee->dev, "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length); 830 netdev_dbg(ieee->dev, "The Packet SeqNum is %d\n", SeqNum); 831 return 0; 832 } 833 834 /* move the data point to data content */ 835 skb_pull(skb, ETHERNET_HEADER_SIZE); 836 837 #ifdef JOHN_NOCPY 838 sub_skb = skb_clone(skb, GFP_ATOMIC); 839 sub_skb->len = nSubframe_Length; 840 sub_skb->tail = sub_skb->data + nSubframe_Length; 841 #else 842 /* Allocate new skb for releasing to upper layer */ 843 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 844 if (!sub_skb) 845 return 0; 846 skb_reserve(sub_skb, 12); 847 skb_put_data(sub_skb, skb->data, nSubframe_Length); 848 #endif 849 rxb->subframes[rxb->nr_subframes++] = sub_skb; 850 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 851 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n"); 852 break; 853 } 854 skb_pull(skb, nSubframe_Length); 855 856 if (skb->len != 0) { 857 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4); 858 if (nPadding_Length == 4) { 859 nPadding_Length = 0; 860 } 861 862 if (skb->len < nPadding_Length) { 863 return 0; 864 } 865 866 skb_pull(skb, nPadding_Length); 867 } 868 } 869 #ifdef JOHN_NOCPY 870 dev_kfree_skb(skb); 871 #endif 872 //{just for debug added by david 873 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes); 874 //} 875 return rxb->nr_subframes; 876 } 877 } 878 879 /* All received frames are sent to this function. @skb contains the frame in 880 * IEEE 802.11 format, i.e., in the format it was sent over air. 881 * This function is called only as a tasklet (software IRQ). */ 882 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, 883 struct ieee80211_rx_stats *rx_stats) 884 { 885 struct net_device *dev = ieee->dev; 886 struct rtl_80211_hdr_4addr *hdr; 887 //struct rtl_80211_hdr_3addrqos *hdr; 888 889 size_t hdrlen; 890 u16 fc, type, stype, sc; 891 struct net_device_stats *stats; 892 unsigned int frag; 893 //added by amy for reorder 894 u8 TID = 0; 895 u16 SeqNum = 0; 896 struct rx_ts_record *pTS = NULL; 897 //bool bIsAggregateFrame = false; 898 //added by amy for reorder 899 #ifdef NOT_YET 900 struct net_device *wds = NULL; 901 struct net_device *wds = NULL; 902 int from_assoc_ap = 0; 903 void *sta = NULL; 904 #endif 905 // u16 qos_ctl = 0; 906 u8 dst[ETH_ALEN]; 907 u8 src[ETH_ALEN]; 908 u8 bssid[ETH_ALEN]; 909 struct ieee80211_crypt_data *crypt = NULL; 910 int keyidx = 0; 911 912 int i; 913 struct ieee80211_rxb *rxb = NULL; 914 // cheat the hdr type 915 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 916 stats = &ieee->stats; 917 918 if (skb->len < 10) { 919 netdev_info(dev, "SKB length < 10\n"); 920 goto rx_dropped; 921 } 922 923 fc = le16_to_cpu(hdr->frame_ctl); 924 type = WLAN_FC_GET_TYPE(fc); 925 stype = WLAN_FC_GET_STYPE(fc); 926 sc = le16_to_cpu(hdr->seq_ctl); 927 928 frag = WLAN_GET_SEQ_FRAG(sc); 929 hdrlen = ieee80211_get_hdrlen(fc); 930 931 if (HTCCheck(ieee, skb->data)) { 932 if (net_ratelimit()) 933 netdev_warn(dev, "find HTCControl\n"); 934 hdrlen += 4; 935 rx_stats->bContainHTC = true; 936 } 937 938 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 939 #ifdef NOT_YET 940 /* Put this code here so that we avoid duplicating it in all 941 * Rx paths. - Jean II */ 942 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ 943 /* If spy monitoring on */ 944 if (iface->spy_data.spy_number > 0) { 945 struct iw_quality wstats; 946 wstats.level = rx_stats->rssi; 947 wstats.noise = rx_stats->noise; 948 wstats.updated = 6; /* No qual value */ 949 /* Update spy records */ 950 wireless_spy_update(dev, hdr->addr2, &wstats); 951 } 952 #endif /* IW_WIRELESS_SPY */ 953 hostap_update_rx_stats(local->ap, hdr, rx_stats); 954 #endif 955 956 if (ieee->iw_mode == IW_MODE_MONITOR) { 957 ieee80211_monitor_rx(ieee, skb, rx_stats); 958 stats->rx_packets++; 959 stats->rx_bytes += skb->len; 960 return 1; 961 } 962 963 if (ieee->host_decrypt) { 964 int idx = 0; 965 if (skb->len >= hdrlen + 3) 966 idx = skb->data[hdrlen + 3] >> 6; 967 crypt = ieee->crypt[idx]; 968 #ifdef NOT_YET 969 sta = NULL; 970 971 /* Use station specific key to override default keys if the 972 * receiver address is a unicast address ("individual RA"). If 973 * bcrx_sta_key parameter is set, station specific key is used 974 * even with broad/multicast targets (this is against IEEE 975 * 802.11, but makes it easier to use different keys with 976 * stations that do not support WEP key mapping). */ 977 978 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) 979 (void)hostap_handle_sta_crypto(local, hdr, &crypt, 980 &sta); 981 #endif 982 983 /* allow NULL decrypt to indicate an station specific override 984 * for default encryption */ 985 if (crypt && (!crypt->ops || !crypt->ops->decrypt_mpdu)) 986 crypt = NULL; 987 988 if (!crypt && (fc & IEEE80211_FCTL_WEP)) { 989 /* This seems to be triggered by some (multicast?) 990 * frames from other than current BSS, so just drop the 991 * frames silently instead of filling system log with 992 * these reports. */ 993 IEEE80211_DEBUG_DROP("Decryption failed (not set)" 994 " (SA=%pM)\n", 995 hdr->addr2); 996 ieee->ieee_stats.rx_discards_undecryptable++; 997 goto rx_dropped; 998 } 999 } 1000 1001 if (skb->len < IEEE80211_DATA_HDR3_LEN) 1002 goto rx_dropped; 1003 1004 // if QoS enabled, should check the sequence for each of the AC 1005 if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) { 1006 if (is_duplicate_packet(ieee, hdr)) 1007 goto rx_dropped; 1008 1009 } else { 1010 struct rx_ts_record *pRxTS = NULL; 1011 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid); 1012 if (GetTs( 1013 ieee, 1014 (struct ts_common_info **)&pRxTS, 1015 hdr->addr2, 1016 Frame_QoSTID((u8 *)(skb->data)), 1017 RX_DIR, 1018 true)) { 1019 1020 // 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)); 1021 if ((fc & (1 << 11)) && 1022 (frag == pRxTS->rx_last_frag_num) && 1023 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) { 1024 goto rx_dropped; 1025 } else { 1026 pRxTS->rx_last_frag_num = frag; 1027 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc); 1028 } 1029 } else { 1030 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__); 1031 goto rx_dropped; 1032 } 1033 } 1034 if (type == IEEE80211_FTYPE_MGMT) { 1035 1036 1037 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1038 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1039 goto rx_dropped; 1040 else 1041 goto rx_exit; 1042 } 1043 1044 /* Data frame - extract src/dst addresses */ 1045 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { 1046 case IEEE80211_FCTL_FROMDS: 1047 memcpy(dst, hdr->addr1, ETH_ALEN); 1048 memcpy(src, hdr->addr3, ETH_ALEN); 1049 memcpy(bssid, hdr->addr2, ETH_ALEN); 1050 break; 1051 case IEEE80211_FCTL_TODS: 1052 memcpy(dst, hdr->addr3, ETH_ALEN); 1053 memcpy(src, hdr->addr2, ETH_ALEN); 1054 memcpy(bssid, hdr->addr1, ETH_ALEN); 1055 break; 1056 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: 1057 if (skb->len < IEEE80211_DATA_HDR4_LEN) 1058 goto rx_dropped; 1059 memcpy(dst, hdr->addr3, ETH_ALEN); 1060 memcpy(src, hdr->addr4, ETH_ALEN); 1061 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); 1062 break; 1063 default: 1064 memcpy(dst, hdr->addr1, ETH_ALEN); 1065 memcpy(src, hdr->addr2, ETH_ALEN); 1066 memcpy(bssid, hdr->addr3, ETH_ALEN); 1067 break; 1068 } 1069 1070 #ifdef NOT_YET 1071 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) 1072 goto rx_dropped; 1073 if (wds) { 1074 skb->dev = dev = wds; 1075 stats = hostap_get_stats(dev); 1076 } 1077 1078 if (ieee->iw_mode == IW_MODE_MASTER && !wds && 1079 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS && 1080 ieee->stadev && 1081 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { 1082 /* Frame from BSSID of the AP for which we are a client */ 1083 skb->dev = dev = ieee->stadev; 1084 stats = hostap_get_stats(dev); 1085 from_assoc_ap = 1; 1086 } 1087 1088 if ((ieee->iw_mode == IW_MODE_MASTER || 1089 ieee->iw_mode == IW_MODE_REPEAT) && 1090 !from_assoc_ap) { 1091 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, 1092 wds)) { 1093 case AP_RX_CONTINUE_NOT_AUTHORIZED: 1094 case AP_RX_CONTINUE: 1095 break; 1096 case AP_RX_DROP: 1097 goto rx_dropped; 1098 case AP_RX_EXIT: 1099 goto rx_exit; 1100 } 1101 } 1102 #endif 1103 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1104 /* Nullfunc frames may have PS-bit set, so they must be passed to 1105 * hostap_handle_sta_rx() before being dropped here. */ 1106 if (stype != IEEE80211_STYPE_DATA && 1107 stype != IEEE80211_STYPE_DATA_CFACK && 1108 stype != IEEE80211_STYPE_DATA_CFPOLL && 1109 stype != IEEE80211_STYPE_DATA_CFACKPOLL && 1110 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4 1111 ) { 1112 if (stype != IEEE80211_STYPE_NULLFUNC) 1113 IEEE80211_DEBUG_DROP( 1114 "RX: dropped data frame " 1115 "with no data (type=0x%02x, " 1116 "subtype=0x%02x, len=%d)\n", 1117 type, stype, skb->len); 1118 goto rx_dropped; 1119 } 1120 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) 1121 goto rx_dropped; 1122 1123 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ 1124 1125 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1126 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) { 1127 netdev_dbg(ieee->dev, "decrypt frame error\n"); 1128 goto rx_dropped; 1129 } 1130 1131 1132 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1133 1134 /* skb: hdr + (possibly fragmented) plaintext payload */ 1135 // PR: FIXME: hostap has additional conditions in the "if" below: 1136 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1137 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1138 int flen; 1139 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); 1140 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); 1141 1142 if (!frag_skb) { 1143 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, 1144 "Rx cannot get skb from fragment " 1145 "cache (morefrag=%d seq=%u frag=%u)\n", 1146 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1147 WLAN_GET_SEQ_SEQ(sc), frag); 1148 goto rx_dropped; 1149 } 1150 flen = skb->len; 1151 if (frag != 0) 1152 flen -= hdrlen; 1153 1154 if (frag_skb->tail + flen > frag_skb->end) { 1155 netdev_warn(dev, "host decrypted and " 1156 "reassembled frame did not fit skb\n"); 1157 ieee80211_frag_cache_invalidate(ieee, hdr); 1158 goto rx_dropped; 1159 } 1160 1161 if (frag == 0) { 1162 /* copy first fragment (including full headers) into 1163 * beginning of the fragment cache skb */ 1164 skb_put_data(frag_skb, skb->data, flen); 1165 } else { 1166 /* append frame payload to the end of the fragment 1167 * cache skb */ 1168 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1169 } 1170 dev_kfree_skb_any(skb); 1171 skb = NULL; 1172 1173 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1174 /* more fragments expected - leave the skb in fragment 1175 * cache for now; it will be delivered to upper layers 1176 * after all fragments have been received */ 1177 goto rx_exit; 1178 } 1179 1180 /* this was the last fragment and the frame will be 1181 * delivered, so remove skb from fragment cache */ 1182 skb = frag_skb; 1183 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1184 ieee80211_frag_cache_invalidate(ieee, hdr); 1185 } 1186 1187 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1188 * encrypted/authenticated */ 1189 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1190 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1191 netdev_dbg(ieee->dev, "==>decrypt msdu error\n"); 1192 goto rx_dropped; 1193 } 1194 1195 //added by amy for AP roaming 1196 ieee->LinkDetectInfo.NumRecvDataInPeriod++; 1197 ieee->LinkDetectInfo.NumRxOkInPeriod++; 1198 1199 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 1200 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { 1201 if (/*ieee->ieee802_1x &&*/ 1202 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1203 1204 #ifdef CONFIG_IEEE80211_DEBUG 1205 /* pass unencrypted EAPOL frames even if encryption is 1206 * configured */ 1207 struct eapol *eap = (struct eapol *)(skb->data + 1208 24); 1209 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1210 eap_get_type(eap->type)); 1211 #endif 1212 } else { 1213 IEEE80211_DEBUG_DROP( 1214 "encryption configured, but RX " 1215 "frame not encrypted (SA=%pM)\n", 1216 hdr->addr2); 1217 goto rx_dropped; 1218 } 1219 } 1220 1221 #ifdef CONFIG_IEEE80211_DEBUG 1222 if (crypt && !(fc & IEEE80211_FCTL_WEP) && 1223 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1224 struct eapol *eap = (struct eapol *)(skb->data + 1225 24); 1226 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1227 eap_get_type(eap->type)); 1228 } 1229 #endif 1230 1231 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && 1232 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1233 IEEE80211_DEBUG_DROP( 1234 "dropped unencrypted RX data " 1235 "frame from %pM" 1236 " (drop_unencrypted=1)\n", 1237 hdr->addr2); 1238 goto rx_dropped; 1239 } 1240 /* 1241 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1242 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); 1243 } 1244 */ 1245 //added by amy for reorder 1246 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1247 && !is_multicast_ether_addr(hdr->addr1)) { 1248 TID = Frame_QoSTID(skb->data); 1249 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1250 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true); 1251 if (TID != 0 && TID != 3) { 1252 ieee->bis_any_nonbepkts = true; 1253 } 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 1318 if (info_element->qui_subtype != sub_type) 1319 return -1; 1320 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1321 return -1; 1322 if (info_element->qui_type != QOS_OUI_TYPE) 1323 return -1; 1324 if (info_element->version != QOS_VERSION_1) 1325 return -1; 1326 1327 return 0; 1328 } 1329 1330 1331 /* 1332 * Parse a QoS parameter element 1333 */ 1334 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info 1335 *element_param, struct ieee80211_info_element 1336 *info_element) 1337 { 1338 int ret = 0; 1339 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2; 1340 1341 if (!info_element || !element_param) 1342 return -1; 1343 1344 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { 1345 memcpy(element_param->info_element.qui, info_element->data, 1346 info_element->len); 1347 element_param->info_element.elementID = info_element->id; 1348 element_param->info_element.length = info_element->len; 1349 } else 1350 ret = -1; 1351 if (ret == 0) 1352 ret = ieee80211_verify_qos_info(&element_param->info_element, 1353 QOS_OUI_PARAM_SUB_TYPE); 1354 return ret; 1355 } 1356 1357 /* 1358 * Parse a QoS information element 1359 */ 1360 static int ieee80211_read_qos_info_element( 1361 struct ieee80211_qos_information_element *element_info, 1362 struct ieee80211_info_element *info_element) 1363 { 1364 int ret = 0; 1365 u16 size = sizeof(struct ieee80211_qos_information_element) - 2; 1366 1367 if (!element_info) 1368 return -1; 1369 if (!info_element) 1370 return -1; 1371 1372 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { 1373 memcpy(element_info->qui, info_element->data, 1374 info_element->len); 1375 element_info->elementID = info_element->id; 1376 element_info->length = info_element->len; 1377 } else 1378 ret = -1; 1379 1380 if (ret == 0) 1381 ret = ieee80211_verify_qos_info(element_info, 1382 QOS_OUI_INFO_SUB_TYPE); 1383 return ret; 1384 } 1385 1386 1387 /* 1388 * Write QoS parameters from the ac parameters. 1389 */ 1390 static int ieee80211_qos_convert_ac_to_parameters( 1391 struct ieee80211_qos_parameter_info *param_elm, 1392 struct ieee80211_qos_parameters *qos_param) 1393 { 1394 int i; 1395 struct ieee80211_qos_ac_parameter *ac_params; 1396 u8 aci; 1397 //u8 cw_min; 1398 //u8 cw_max; 1399 1400 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1401 ac_params = &(param_elm->ac_params_record[i]); 1402 1403 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1404 1405 if (aci >= QOS_QUEUE_NUM) 1406 continue; 1407 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1408 1409 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1410 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci]; 1411 1412 qos_param->cw_min[aci] = 1413 cpu_to_le16(ac_params->ecw_min_max & 0x0F); 1414 1415 qos_param->cw_max[aci] = 1416 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4); 1417 1418 qos_param->flag[aci] = 1419 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1420 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1421 } 1422 return 0; 1423 } 1424 1425 /* 1426 * we have a generic data element which it may contain QoS information or 1427 * parameters element. check the information element length to decide 1428 * which type to read 1429 */ 1430 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element 1431 *info_element, 1432 struct ieee80211_network *network) 1433 { 1434 int rc = 0; 1435 struct ieee80211_qos_parameters *qos_param = NULL; 1436 struct ieee80211_qos_information_element qos_info_element; 1437 1438 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); 1439 1440 if (rc == 0) { 1441 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1442 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1443 } else { 1444 struct ieee80211_qos_parameter_info param_element; 1445 1446 rc = ieee80211_read_qos_param_element(¶m_element, 1447 info_element); 1448 if (rc == 0) { 1449 qos_param = &(network->qos_data.parameters); 1450 ieee80211_qos_convert_ac_to_parameters(¶m_element, 1451 qos_param); 1452 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1453 network->qos_data.param_count = 1454 param_element.info_element.ac_info & 0x0F; 1455 } 1456 } 1457 1458 if (rc == 0) { 1459 IEEE80211_DEBUG_QOS("QoS is supported\n"); 1460 network->qos_data.supported = 1; 1461 } 1462 return rc; 1463 } 1464 1465 #ifdef CONFIG_IEEE80211_DEBUG 1466 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x 1467 1468 static const char *get_info_element_string(u16 id) 1469 { 1470 switch (id) { 1471 MFIE_STRING(SSID); 1472 MFIE_STRING(RATES); 1473 MFIE_STRING(FH_SET); 1474 MFIE_STRING(DS_SET); 1475 MFIE_STRING(CF_SET); 1476 MFIE_STRING(TIM); 1477 MFIE_STRING(IBSS_SET); 1478 MFIE_STRING(COUNTRY); 1479 MFIE_STRING(HOP_PARAMS); 1480 MFIE_STRING(HOP_TABLE); 1481 MFIE_STRING(REQUEST); 1482 MFIE_STRING(CHALLENGE); 1483 MFIE_STRING(POWER_CONSTRAINT); 1484 MFIE_STRING(POWER_CAPABILITY); 1485 MFIE_STRING(TPC_REQUEST); 1486 MFIE_STRING(TPC_REPORT); 1487 MFIE_STRING(SUPP_CHANNELS); 1488 MFIE_STRING(CSA); 1489 MFIE_STRING(MEASURE_REQUEST); 1490 MFIE_STRING(MEASURE_REPORT); 1491 MFIE_STRING(QUIET); 1492 MFIE_STRING(IBSS_DFS); 1493 // MFIE_STRING(ERP_INFO); 1494 MFIE_STRING(RSN); 1495 MFIE_STRING(RATES_EX); 1496 MFIE_STRING(GENERIC); 1497 MFIE_STRING(QOS_PARAMETER); 1498 default: 1499 return "UNKNOWN"; 1500 } 1501 } 1502 #endif 1503 1504 static inline void ieee80211_extract_country_ie( 1505 struct ieee80211_device *ieee, 1506 struct ieee80211_info_element *info_element, 1507 struct ieee80211_network *network, 1508 u8 *addr2 1509 ) 1510 { 1511 if (IS_DOT11D_ENABLE(ieee)) { 1512 if (info_element->len != 0) { 1513 memcpy(network->CountryIeBuf, info_element->data, info_element->len); 1514 network->CountryIeLen = info_element->len; 1515 1516 if (!IS_COUNTRY_IE_VALID(ieee)) { 1517 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data); 1518 } 1519 } 1520 1521 // 1522 // 070305, rcnjko: I update country IE watch dog here because 1523 // some AP (e.g. Cisco 1242) don't include country IE in their 1524 // probe response frame. 1525 // 1526 if (IS_EQUAL_CIE_SRC(ieee, addr2)) { 1527 UPDATE_CIE_WATCHDOG(ieee); 1528 } 1529 } 1530 1531 } 1532 1533 int ieee80211_parse_info_param(struct ieee80211_device *ieee, 1534 struct ieee80211_info_element *info_element, 1535 u16 length, 1536 struct ieee80211_network *network, 1537 struct ieee80211_rx_stats *stats) 1538 { 1539 u8 i; 1540 short offset; 1541 u16 tmp_htcap_len = 0; 1542 u16 tmp_htinfo_len = 0; 1543 u16 ht_realtek_agg_len = 0; 1544 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1545 // u16 broadcom_len = 0; 1546 #ifdef CONFIG_IEEE80211_DEBUG 1547 char rates_str[64]; 1548 char *p; 1549 #endif 1550 1551 while (length >= sizeof(*info_element)) { 1552 if (sizeof(*info_element) + info_element->len > length) { 1553 IEEE80211_DEBUG_MGMT("Info elem: parse failed: " 1554 "info_element->len + 2 > left : " 1555 "info_element->len+2=%zd left=%d, id=%d.\n", 1556 info_element->len + 1557 sizeof(*info_element), 1558 length, info_element->id); 1559 /* We stop processing but don't return an error here 1560 * because some misbehaviour APs break this rule. ie. 1561 * Orinoco AP1000. */ 1562 break; 1563 } 1564 1565 switch (info_element->id) { 1566 case MFIE_TYPE_SSID: 1567 if (ieee80211_is_empty_essid(info_element->data, 1568 info_element->len)) { 1569 network->flags |= NETWORK_EMPTY_ESSID; 1570 break; 1571 } 1572 1573 network->ssid_len = min(info_element->len, 1574 (u8)IW_ESSID_MAX_SIZE); 1575 memcpy(network->ssid, info_element->data, network->ssid_len); 1576 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1577 memset(network->ssid + network->ssid_len, 0, 1578 IW_ESSID_MAX_SIZE - network->ssid_len); 1579 1580 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", 1581 network->ssid, network->ssid_len); 1582 break; 1583 1584 case MFIE_TYPE_RATES: 1585 #ifdef CONFIG_IEEE80211_DEBUG 1586 p = rates_str; 1587 #endif 1588 network->rates_len = min(info_element->len, 1589 MAX_RATES_LENGTH); 1590 for (i = 0; i < network->rates_len; i++) { 1591 network->rates[i] = info_element->data[i]; 1592 #ifdef CONFIG_IEEE80211_DEBUG 1593 p += scnprintf(p, sizeof(rates_str) - 1594 (p - rates_str), "%02X ", 1595 network->rates[i]); 1596 #endif 1597 if (ieee80211_is_ofdm_rate 1598 (info_element->data[i])) { 1599 network->flags |= NETWORK_HAS_OFDM; 1600 if (info_element->data[i] & 1601 IEEE80211_BASIC_RATE_MASK) 1602 network->flags &= 1603 ~NETWORK_HAS_CCK; 1604 } 1605 } 1606 1607 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", 1608 rates_str, network->rates_len); 1609 break; 1610 1611 case MFIE_TYPE_RATES_EX: 1612 #ifdef CONFIG_IEEE80211_DEBUG 1613 p = rates_str; 1614 #endif 1615 network->rates_ex_len = min(info_element->len, 1616 MAX_RATES_EX_LENGTH); 1617 for (i = 0; i < network->rates_ex_len; i++) { 1618 network->rates_ex[i] = info_element->data[i]; 1619 #ifdef CONFIG_IEEE80211_DEBUG 1620 p += scnprintf(p, sizeof(rates_str) - 1621 (p - rates_str), "%02X ", 1622 network->rates_ex[i]); 1623 #endif 1624 if (ieee80211_is_ofdm_rate 1625 (info_element->data[i])) { 1626 network->flags |= NETWORK_HAS_OFDM; 1627 if (info_element->data[i] & 1628 IEEE80211_BASIC_RATE_MASK) 1629 network->flags &= 1630 ~NETWORK_HAS_CCK; 1631 } 1632 } 1633 1634 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1635 rates_str, network->rates_ex_len); 1636 break; 1637 1638 case MFIE_TYPE_DS_SET: 1639 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", 1640 info_element->data[0]); 1641 network->channel = info_element->data[0]; 1642 break; 1643 1644 case MFIE_TYPE_FH_SET: 1645 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); 1646 break; 1647 1648 case MFIE_TYPE_CF_SET: 1649 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); 1650 break; 1651 1652 case MFIE_TYPE_TIM: 1653 if (info_element->len < 4) 1654 break; 1655 1656 network->tim.tim_count = info_element->data[0]; 1657 network->tim.tim_period = info_element->data[1]; 1658 1659 network->dtim_period = info_element->data[1]; 1660 if (ieee->state != IEEE80211_LINKED) 1661 break; 1662 1663 network->last_dtim_sta_time[0] = stats->mac_time[0]; 1664 network->last_dtim_sta_time[1] = stats->mac_time[1]; 1665 1666 network->dtim_data = IEEE80211_DTIM_VALID; 1667 1668 if (info_element->data[0] != 0) 1669 break; 1670 1671 if (info_element->data[2] & 1) 1672 network->dtim_data |= IEEE80211_DTIM_MBCAST; 1673 1674 offset = (info_element->data[2] >> 1) * 2; 1675 1676 if (ieee->assoc_id < 8 * offset || 1677 ieee->assoc_id > 8 * (offset + info_element->len - 3)) 1678 1679 break; 1680 1681 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ; 1682 1683 if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8))) 1684 network->dtim_data |= IEEE80211_DTIM_UCAST; 1685 1686 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); 1687 break; 1688 1689 case MFIE_TYPE_ERP: 1690 network->erp_value = info_element->data[0]; 1691 network->flags |= NETWORK_HAS_ERP_VALUE; 1692 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", 1693 network->erp_value); 1694 break; 1695 case MFIE_TYPE_IBSS_SET: 1696 network->atim_window = info_element->data[0]; 1697 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", 1698 network->atim_window); 1699 break; 1700 1701 case MFIE_TYPE_CHALLENGE: 1702 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); 1703 break; 1704 1705 case MFIE_TYPE_GENERIC: 1706 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", 1707 info_element->len); 1708 if (!ieee80211_parse_qos_info_param_IE(info_element, 1709 network)) 1710 break; 1711 1712 if (info_element->len >= 4 && 1713 info_element->data[0] == 0x00 && 1714 info_element->data[1] == 0x50 && 1715 info_element->data[2] == 0xf2 && 1716 info_element->data[3] == 0x01) { 1717 network->wpa_ie_len = min(info_element->len + 2, 1718 MAX_WPA_IE_LEN); 1719 memcpy(network->wpa_ie, info_element, 1720 network->wpa_ie_len); 1721 break; 1722 } 1723 1724 #ifdef THOMAS_TURBO 1725 if (info_element->len == 7 && 1726 info_element->data[0] == 0x00 && 1727 info_element->data[1] == 0xe0 && 1728 info_element->data[2] == 0x4c && 1729 info_element->data[3] == 0x01 && 1730 info_element->data[4] == 0x02) { 1731 network->Turbo_Enable = 1; 1732 } 1733 #endif 1734 1735 //for HTcap and HTinfo parameters 1736 if (tmp_htcap_len == 0) { 1737 if (info_element->len >= 4 && 1738 info_element->data[0] == 0x00 && 1739 info_element->data[1] == 0x90 && 1740 info_element->data[2] == 0x4c && 1741 info_element->data[3] == 0x033){ 1742 1743 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1744 if (tmp_htcap_len != 0) { 1745 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1746 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1747 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1748 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1749 } 1750 } 1751 if (tmp_htcap_len != 0) 1752 network->bssht.bdSupportHT = true; 1753 else 1754 network->bssht.bdSupportHT = false; 1755 } 1756 1757 1758 if (tmp_htinfo_len == 0) { 1759 if (info_element->len >= 4 && 1760 info_element->data[0] == 0x00 && 1761 info_element->data[1] == 0x90 && 1762 info_element->data[2] == 0x4c && 1763 info_element->data[3] == 0x034){ 1764 1765 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1766 if (tmp_htinfo_len != 0) { 1767 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1768 if (tmp_htinfo_len) { 1769 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1770 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1771 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1772 } 1773 1774 } 1775 1776 } 1777 } 1778 1779 if (ieee->aggregation) { 1780 if (network->bssht.bdSupportHT) { 1781 if (info_element->len >= 4 && 1782 info_element->data[0] == 0x00 && 1783 info_element->data[1] == 0xe0 && 1784 info_element->data[2] == 0x4c && 1785 info_element->data[3] == 0x02){ 1786 1787 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN); 1788 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len); 1789 1790 } 1791 if (ht_realtek_agg_len >= 5) { 1792 network->bssht.bdRT2RTAggregation = true; 1793 1794 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02)) 1795 network->bssht.bdRT2RTLongSlotTime = true; 1796 } 1797 } 1798 1799 } 1800 1801 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0) 1802 { 1803 if ((info_element->len >= 3 && 1804 info_element->data[0] == 0x00 && 1805 info_element->data[1] == 0x05 && 1806 info_element->data[2] == 0xb5) || 1807 (info_element->len >= 3 && 1808 info_element->data[0] == 0x00 && 1809 info_element->data[1] == 0x0a && 1810 info_element->data[2] == 0xf7) || 1811 (info_element->len >= 3 && 1812 info_element->data[0] == 0x00 && 1813 info_element->data[1] == 0x10 && 1814 info_element->data[2] == 0x18)){ 1815 1816 network->broadcom_cap_exist = true; 1817 1818 } 1819 } 1820 if (info_element->len >= 3 && 1821 info_element->data[0] == 0x00 && 1822 info_element->data[1] == 0x0c && 1823 info_element->data[2] == 0x43) { 1824 network->ralink_cap_exist = true; 1825 } else 1826 network->ralink_cap_exist = false; 1827 //added by amy for atheros AP 1828 if ((info_element->len >= 3 && 1829 info_element->data[0] == 0x00 && 1830 info_element->data[1] == 0x03 && 1831 info_element->data[2] == 0x7f) || 1832 (info_element->len >= 3 && 1833 info_element->data[0] == 0x00 && 1834 info_element->data[1] == 0x13 && 1835 info_element->data[2] == 0x74)) { 1836 netdev_dbg(ieee->dev, "========> athros AP is exist\n"); 1837 network->atheros_cap_exist = true; 1838 } else 1839 network->atheros_cap_exist = false; 1840 1841 if (info_element->len >= 3 && 1842 info_element->data[0] == 0x00 && 1843 info_element->data[1] == 0x40 && 1844 info_element->data[2] == 0x96) { 1845 network->cisco_cap_exist = true; 1846 } else 1847 network->cisco_cap_exist = false; 1848 //added by amy for LEAP of cisco 1849 if (info_element->len > 4 && 1850 info_element->data[0] == 0x00 && 1851 info_element->data[1] == 0x40 && 1852 info_element->data[2] == 0x96 && 1853 info_element->data[3] == 0x01) { 1854 if (info_element->len == 6) { 1855 memcpy(network->CcxRmState, &info_element[4], 2); 1856 if (network->CcxRmState[0] != 0) 1857 network->bCcxRmEnable = true; 1858 else 1859 network->bCcxRmEnable = false; 1860 // 1861 // CCXv4 Table 59-1 MBSSID Masks. 1862 // 1863 network->MBssidMask = network->CcxRmState[1] & 0x07; 1864 if (network->MBssidMask != 0) { 1865 network->bMBssidValid = true; 1866 network->MBssidMask = 0xff << (network->MBssidMask); 1867 ether_addr_copy(network->MBssid, network->bssid); 1868 network->MBssid[5] &= network->MBssidMask; 1869 } else { 1870 network->bMBssidValid = false; 1871 } 1872 } else { 1873 network->bCcxRmEnable = false; 1874 } 1875 } 1876 if (info_element->len > 4 && 1877 info_element->data[0] == 0x00 && 1878 info_element->data[1] == 0x40 && 1879 info_element->data[2] == 0x96 && 1880 info_element->data[3] == 0x03) { 1881 if (info_element->len == 5) { 1882 network->bWithCcxVerNum = true; 1883 network->BssCcxVerNumber = info_element->data[4]; 1884 } else { 1885 network->bWithCcxVerNum = false; 1886 network->BssCcxVerNumber = 0; 1887 } 1888 } 1889 break; 1890 1891 case MFIE_TYPE_RSN: 1892 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", 1893 info_element->len); 1894 network->rsn_ie_len = min(info_element->len + 2, 1895 MAX_WPA_IE_LEN); 1896 memcpy(network->rsn_ie, info_element, 1897 network->rsn_ie_len); 1898 break; 1899 1900 //HT related element. 1901 case MFIE_TYPE_HT_CAP: 1902 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n", 1903 info_element->len); 1904 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN); 1905 if (tmp_htcap_len != 0) { 1906 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1907 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \ 1908 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len; 1909 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen); 1910 1911 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT() 1912 // windows driver will update WMM parameters each beacon received once connected 1913 // Linux driver is a bit different. 1914 network->bssht.bdSupportHT = true; 1915 } else 1916 network->bssht.bdSupportHT = false; 1917 break; 1918 1919 1920 case MFIE_TYPE_HT_INFO: 1921 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n", 1922 info_element->len); 1923 tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN); 1924 if (tmp_htinfo_len) { 1925 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; 1926 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \ 1927 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len; 1928 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen); 1929 } 1930 break; 1931 1932 case MFIE_TYPE_AIRONET: 1933 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n", 1934 info_element->len); 1935 if (info_element->len > IE_CISCO_FLAG_POSITION) { 1936 network->bWithAironetIE = true; 1937 1938 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23): 1939 // "A Cisco access point advertises support for CKIP in beacon and probe response packets, 1940 // by adding an Aironet element and setting one or both of the CKIP negotiation bits." 1941 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) || 1942 (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) { 1943 network->bCkipSupported = true; 1944 } else { 1945 network->bCkipSupported = false; 1946 } 1947 } else { 1948 network->bWithAironetIE = false; 1949 network->bCkipSupported = false; 1950 } 1951 break; 1952 case MFIE_TYPE_QOS_PARAMETER: 1953 netdev_err(ieee->dev, 1954 "QoS Error need to parse QOS_PARAMETER IE\n"); 1955 break; 1956 1957 case MFIE_TYPE_COUNTRY: 1958 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", 1959 info_element->len); 1960 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP 1961 break; 1962 /* TODO */ 1963 default: 1964 IEEE80211_DEBUG_MGMT 1965 ("Unsupported info element: %s (%d)\n", 1966 get_info_element_string(info_element->id), 1967 info_element->id); 1968 break; 1969 } 1970 1971 length -= sizeof(*info_element) + info_element->len; 1972 info_element = 1973 (struct ieee80211_info_element *)&info_element-> 1974 data[info_element->len]; 1975 } 1976 1977 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 1978 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) { 1979 network->unknown_cap_exist = true; 1980 } else { 1981 network->unknown_cap_exist = false; 1982 } 1983 return 0; 1984 } 1985 1986 static inline u8 ieee80211_SignalStrengthTranslate( 1987 u8 CurrSS 1988 ) 1989 { 1990 u8 RetSS; 1991 1992 // Step 1. Scale mapping. 1993 if (CurrSS >= 71 && CurrSS <= 100) { 1994 RetSS = 90 + ((CurrSS - 70) / 3); 1995 } else if (CurrSS >= 41 && CurrSS <= 70) { 1996 RetSS = 78 + ((CurrSS - 40) / 3); 1997 } else if (CurrSS >= 31 && CurrSS <= 40) { 1998 RetSS = 66 + (CurrSS - 30); 1999 } else if (CurrSS >= 21 && CurrSS <= 30) { 2000 RetSS = 54 + (CurrSS - 20); 2001 } else if (CurrSS >= 5 && CurrSS <= 20) { 2002 RetSS = 42 + (((CurrSS - 5) * 2) / 3); 2003 } else if (CurrSS == 4) { 2004 RetSS = 36; 2005 } else if (CurrSS == 3) { 2006 RetSS = 27; 2007 } else if (CurrSS == 2) { 2008 RetSS = 18; 2009 } else if (CurrSS == 1) { 2010 RetSS = 9; 2011 } else { 2012 RetSS = CurrSS; 2013 } 2014 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); 2015 2016 // Step 2. Smoothing. 2017 2018 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); 2019 2020 return RetSS; 2021 } 2022 2023 /* 0-100 index */ 2024 static long ieee80211_translate_todbm(u8 signal_strength_index) 2025 { 2026 long signal_power; // in dBm. 2027 2028 // Translate to dBm (x=0.5y-95). 2029 signal_power = (long)((signal_strength_index + 1) >> 1); 2030 signal_power -= 95; 2031 2032 return signal_power; 2033 } 2034 2035 static inline int ieee80211_network_init( 2036 struct ieee80211_device *ieee, 2037 struct ieee80211_probe_response *beacon, 2038 struct ieee80211_network *network, 2039 struct ieee80211_rx_stats *stats) 2040 { 2041 #ifdef CONFIG_IEEE80211_DEBUG 2042 //char rates_str[64]; 2043 //char *p; 2044 #endif 2045 2046 network->qos_data.active = 0; 2047 network->qos_data.supported = 0; 2048 network->qos_data.param_count = 0; 2049 network->qos_data.old_param_count = 0; 2050 2051 /* Pull out fixed field data */ 2052 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); 2053 network->capability = le16_to_cpu(beacon->capability); 2054 network->last_scanned = jiffies; 2055 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); 2056 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); 2057 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 2058 /* Where to pull this? beacon->listen_interval;*/ 2059 network->listen_interval = 0x0A; 2060 network->rates_len = network->rates_ex_len = 0; 2061 network->last_associate = 0; 2062 network->ssid_len = 0; 2063 network->flags = 0; 2064 network->atim_window = 0; 2065 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2066 0x3 : 0x0; 2067 network->berp_info_valid = false; 2068 network->broadcom_cap_exist = false; 2069 network->ralink_cap_exist = false; 2070 network->atheros_cap_exist = false; 2071 network->cisco_cap_exist = false; 2072 network->unknown_cap_exist = false; 2073 #ifdef THOMAS_TURBO 2074 network->Turbo_Enable = 0; 2075 #endif 2076 network->CountryIeLen = 0; 2077 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2078 //Initialize HT parameters 2079 //ieee80211_ht_initialize(&network->bssht); 2080 HTInitializeBssDesc(&network->bssht); 2081 if (stats->freq == IEEE80211_52GHZ_BAND) { 2082 /* for A band (No DS info) */ 2083 network->channel = stats->received_channel; 2084 } else 2085 network->flags |= NETWORK_HAS_CCK; 2086 2087 network->wpa_ie_len = 0; 2088 network->rsn_ie_len = 0; 2089 2090 if (ieee80211_parse_info_param 2091 (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats)) 2092 return 1; 2093 2094 network->mode = 0; 2095 if (stats->freq == IEEE80211_52GHZ_BAND) 2096 network->mode = IEEE_A; 2097 else { 2098 if (network->flags & NETWORK_HAS_OFDM) 2099 network->mode |= IEEE_G; 2100 if (network->flags & NETWORK_HAS_CCK) 2101 network->mode |= IEEE_B; 2102 } 2103 2104 if (network->mode == 0) { 2105 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' " 2106 "network.\n", 2107 escape_essid(network->ssid, 2108 network->ssid_len), 2109 network->bssid); 2110 return 1; 2111 } 2112 2113 if (network->bssht.bdSupportHT) { 2114 if (network->mode == IEEE_A) 2115 network->mode = IEEE_N_5G; 2116 else if (network->mode & (IEEE_G | IEEE_B)) 2117 network->mode = IEEE_N_24G; 2118 } 2119 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) 2120 network->flags |= NETWORK_EMPTY_ESSID; 2121 2122 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2123 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal); 2124 stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25; 2125 2126 memcpy(&network->stats, stats, sizeof(network->stats)); 2127 2128 return 0; 2129 } 2130 2131 static inline int is_same_network(struct ieee80211_network *src, 2132 struct ieee80211_network *dst, struct ieee80211_device *ieee) 2133 { 2134 /* A network is only a duplicate if the channel, BSSID, ESSID 2135 * and the capability field (in particular IBSS and BSS) all match. 2136 * We treat all <hidden> with the same BSSID and channel 2137 * as one network */ 2138 return //((src->ssid_len == dst->ssid_len) && 2139 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2140 (src->channel == dst->channel) && 2141 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2142 //!memcmp(src->ssid, dst->ssid, src->ssid_len) && 2143 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2144 ((src->capability & WLAN_CAPABILITY_IBSS) == 2145 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2146 ((src->capability & WLAN_CAPABILITY_BSS) == 2147 (dst->capability & WLAN_CAPABILITY_BSS))); 2148 } 2149 2150 static inline void update_network(struct ieee80211_network *dst, 2151 struct ieee80211_network *src) 2152 { 2153 int qos_active; 2154 u8 old_param; 2155 2156 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); 2157 dst->capability = src->capability; 2158 memcpy(dst->rates, src->rates, src->rates_len); 2159 dst->rates_len = src->rates_len; 2160 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2161 dst->rates_ex_len = src->rates_ex_len; 2162 if (src->ssid_len > 0) { 2163 memset(dst->ssid, 0, dst->ssid_len); 2164 dst->ssid_len = src->ssid_len; 2165 memcpy(dst->ssid, src->ssid, src->ssid_len); 2166 } 2167 dst->mode = src->mode; 2168 dst->flags = src->flags; 2169 dst->time_stamp[0] = src->time_stamp[0]; 2170 dst->time_stamp[1] = src->time_stamp[1]; 2171 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2172 dst->erp_value = src->erp_value; 2173 dst->berp_info_valid = src->berp_info_valid = true; 2174 } 2175 dst->beacon_interval = src->beacon_interval; 2176 dst->listen_interval = src->listen_interval; 2177 dst->atim_window = src->atim_window; 2178 dst->dtim_period = src->dtim_period; 2179 dst->dtim_data = src->dtim_data; 2180 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; 2181 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; 2182 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters)); 2183 2184 dst->bssht.bdSupportHT = src->bssht.bdSupportHT; 2185 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; 2186 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen; 2187 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen); 2188 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen; 2189 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen); 2190 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; 2191 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; 2192 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2193 dst->ralink_cap_exist = src->ralink_cap_exist; 2194 dst->atheros_cap_exist = src->atheros_cap_exist; 2195 dst->cisco_cap_exist = src->cisco_cap_exist; 2196 dst->unknown_cap_exist = src->unknown_cap_exist; 2197 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2198 dst->wpa_ie_len = src->wpa_ie_len; 2199 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2200 dst->rsn_ie_len = src->rsn_ie_len; 2201 2202 dst->last_scanned = jiffies; 2203 /* qos related parameters */ 2204 //qos_active = src->qos_data.active; 2205 qos_active = dst->qos_data.active; 2206 //old_param = dst->qos_data.old_param_count; 2207 old_param = dst->qos_data.param_count; 2208 if (dst->flags & NETWORK_HAS_QOS_MASK) 2209 memcpy(&dst->qos_data, &src->qos_data, 2210 sizeof(struct ieee80211_qos_data)); 2211 else { 2212 dst->qos_data.supported = src->qos_data.supported; 2213 dst->qos_data.param_count = src->qos_data.param_count; 2214 } 2215 2216 if (dst->qos_data.supported == 1) { 2217 dst->QoS_Enable = 1; 2218 if (dst->ssid_len) 2219 IEEE80211_DEBUG_QOS 2220 ("QoS the network %s is QoS supported\n", 2221 dst->ssid); 2222 else 2223 IEEE80211_DEBUG_QOS 2224 ("QoS the network is QoS supported\n"); 2225 } 2226 dst->qos_data.active = qos_active; 2227 dst->qos_data.old_param_count = old_param; 2228 2229 /* dst->last_associate is not overwritten */ 2230 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. 2231 if (src->wmm_param[0].aci_aifsn || \ 2232 src->wmm_param[1].aci_aifsn || \ 2233 src->wmm_param[2].aci_aifsn || \ 2234 src->wmm_param[3].aci_aifsn) { 2235 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2236 } 2237 //dst->QoS_Enable = src->QoS_Enable; 2238 #ifdef THOMAS_TURBO 2239 dst->Turbo_Enable = src->Turbo_Enable; 2240 #endif 2241 2242 dst->CountryIeLen = src->CountryIeLen; 2243 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2244 2245 //added by amy for LEAP 2246 dst->bWithAironetIE = src->bWithAironetIE; 2247 dst->bCkipSupported = src->bCkipSupported; 2248 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2249 dst->bCcxRmEnable = src->bCcxRmEnable; 2250 dst->MBssidMask = src->MBssidMask; 2251 dst->bMBssidValid = src->bMBssidValid; 2252 memcpy(dst->MBssid, src->MBssid, 6); 2253 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2254 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2255 2256 } 2257 2258 static inline int is_beacon(__le16 fc) 2259 { 2260 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); 2261 } 2262 2263 static inline void ieee80211_process_probe_response( 2264 struct ieee80211_device *ieee, 2265 struct ieee80211_probe_response *beacon, 2266 struct ieee80211_rx_stats *stats) 2267 { 2268 struct ieee80211_network *network; 2269 struct ieee80211_network *target; 2270 struct ieee80211_network *oldest = NULL; 2271 #ifdef CONFIG_IEEE80211_DEBUG 2272 struct ieee80211_info_element *info_element = &beacon->info_element[0]; 2273 #endif 2274 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)); 2275 unsigned long flags; 2276 short renew; 2277 u16 capability; 2278 //u8 wmm_info; 2279 2280 network = kzalloc(sizeof(*network), GFP_ATOMIC); 2281 if (!network) 2282 goto out; 2283 2284 capability = le16_to_cpu(beacon->capability); 2285 IEEE80211_DEBUG_SCAN( 2286 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2287 escape_essid(info_element->data, info_element->len), 2288 beacon->header.addr3, 2289 (capability & BIT(0xf)) ? '1' : '0', 2290 (capability & BIT(0xe)) ? '1' : '0', 2291 (capability & BIT(0xd)) ? '1' : '0', 2292 (capability & BIT(0xc)) ? '1' : '0', 2293 (capability & BIT(0xb)) ? '1' : '0', 2294 (capability & BIT(0xa)) ? '1' : '0', 2295 (capability & BIT(0x9)) ? '1' : '0', 2296 (capability & BIT(0x8)) ? '1' : '0', 2297 (capability & BIT(0x7)) ? '1' : '0', 2298 (capability & BIT(0x6)) ? '1' : '0', 2299 (capability & BIT(0x5)) ? '1' : '0', 2300 (capability & BIT(0x4)) ? '1' : '0', 2301 (capability & BIT(0x3)) ? '1' : '0', 2302 (capability & BIT(0x2)) ? '1' : '0', 2303 (capability & BIT(0x1)) ? '1' : '0', 2304 (capability & BIT(0x0)) ? '1' : '0'); 2305 2306 if (ieee80211_network_init(ieee, beacon, network, stats)) { 2307 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n", 2308 escape_essid(info_element->data, 2309 info_element->len), 2310 beacon->header.addr3, 2311 fc == IEEE80211_STYPE_PROBE_RESP ? 2312 "PROBE RESPONSE" : "BEACON"); 2313 goto out; 2314 } 2315 2316 // For Asus EeePc request, 2317 // (1) if wireless adapter receive get any 802.11d country code in AP beacon, 2318 // wireless adapter should follow the country code. 2319 // (2) If there is no any country code in beacon, 2320 // then wireless adapter should do active scan from ch1~11 and 2321 // passive scan from ch12~14 2322 2323 if (!is_legal_channel(ieee, network->channel)) 2324 goto out; 2325 if (ieee->bGlobalDomain) { 2326 if (fc == IEEE80211_STYPE_PROBE_RESP) { 2327 if (IS_COUNTRY_IE_VALID(ieee)) { 2328 // Case 1: Country code 2329 if (!is_legal_channel(ieee, network->channel)) { 2330 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel); 2331 goto out; 2332 } 2333 } else { 2334 // Case 2: No any country code. 2335 // Filter over channel ch12~14 2336 if (network->channel > 11) { 2337 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel); 2338 goto out; 2339 } 2340 } 2341 } else { 2342 if (IS_COUNTRY_IE_VALID(ieee)) { 2343 // Case 1: Country code 2344 if (!is_legal_channel(ieee, network->channel)) { 2345 netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel); 2346 goto out; 2347 } 2348 } else { 2349 // Case 2: No any country code. 2350 // Filter over channel ch12~14 2351 if (network->channel > 14) { 2352 netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel); 2353 goto out; 2354 } 2355 } 2356 } 2357 } 2358 2359 /* The network parsed correctly -- so now we scan our known networks 2360 * to see if we can find it in our list. 2361 * 2362 * NOTE: This search is definitely not optimized. Once its doing 2363 * the "right thing" we'll optimize it for efficiency if 2364 * necessary */ 2365 2366 /* Search for this entry in the list and update it if it is 2367 * already there. */ 2368 2369 spin_lock_irqsave(&ieee->lock, flags); 2370 2371 if (is_same_network(&ieee->current_network, network, ieee)) { 2372 update_network(&ieee->current_network, network); 2373 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G) 2374 && ieee->current_network.berp_info_valid){ 2375 if (ieee->current_network.erp_value & ERP_UseProtection) 2376 ieee->current_network.buseprotection = true; 2377 else 2378 ieee->current_network.buseprotection = false; 2379 } 2380 if (is_beacon(beacon->header.frame_ctl)) { 2381 if (ieee->state == IEEE80211_LINKED) 2382 ieee->LinkDetectInfo.NumRecvBcnInPeriod++; 2383 } else //hidden AP 2384 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags); 2385 } 2386 2387 list_for_each_entry(target, &ieee->network_list, list) { 2388 if (is_same_network(target, network, ieee)) 2389 break; 2390 if (!oldest || 2391 (target->last_scanned < oldest->last_scanned)) 2392 oldest = target; 2393 } 2394 2395 /* If we didn't find a match, then get a new network slot to initialize 2396 * with this beacon's information */ 2397 if (&target->list == &ieee->network_list) { 2398 if (list_empty(&ieee->network_free_list)) { 2399 /* If there are no more slots, expire the oldest */ 2400 list_del(&oldest->list); 2401 target = oldest; 2402 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from " 2403 "network list.\n", 2404 escape_essid(target->ssid, 2405 target->ssid_len), 2406 target->bssid); 2407 } else { 2408 /* Otherwise just pull from the free list */ 2409 target = list_entry(ieee->network_free_list.next, 2410 struct ieee80211_network, list); 2411 list_del(ieee->network_free_list.next); 2412 } 2413 2414 2415 #ifdef CONFIG_IEEE80211_DEBUG 2416 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n", 2417 escape_essid(network->ssid, 2418 network->ssid_len), 2419 network->bssid, 2420 fc == IEEE80211_STYPE_PROBE_RESP ? 2421 "PROBE RESPONSE" : "BEACON"); 2422 #endif 2423 memcpy(target, network, sizeof(*target)); 2424 list_add_tail(&target->list, &ieee->network_list); 2425 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2426 ieee80211_softmac_new_net(ieee, network); 2427 } else { 2428 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n", 2429 escape_essid(target->ssid, 2430 target->ssid_len), 2431 target->bssid, 2432 fc == IEEE80211_STYPE_PROBE_RESP ? 2433 "PROBE RESPONSE" : "BEACON"); 2434 2435 /* we have an entry and we are going to update it. But this entry may 2436 * be already expired. In this case we do the same as we found a new 2437 * net and call the new_net handler 2438 */ 2439 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); 2440 //YJ,add,080819,for hidden ap 2441 if (is_beacon(beacon->header.frame_ctl) == 0) 2442 network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags); 2443 //if(strncmp(network->ssid, "linksys-c",9) == 0) 2444 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags); 2445 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ 2446 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\ 2447 || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK)))) 2448 renew = 1; 2449 //YJ,add,080819,for hidden ap,end 2450 2451 update_network(target, network); 2452 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2453 ieee80211_softmac_new_net(ieee, network); 2454 } 2455 2456 spin_unlock_irqrestore(&ieee->lock, flags); 2457 if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \ 2458 (ieee->state == IEEE80211_LINKED)) { 2459 if (ieee->handle_beacon) 2460 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network); 2461 } 2462 2463 out: 2464 kfree(network); 2465 } 2466 2467 void ieee80211_rx_mgt(struct ieee80211_device *ieee, 2468 struct rtl_80211_hdr_4addr *header, 2469 struct ieee80211_rx_stats *stats) 2470 { 2471 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { 2472 2473 case IEEE80211_STYPE_BEACON: 2474 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", 2475 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2476 IEEE80211_DEBUG_SCAN("Beacon\n"); 2477 ieee80211_process_probe_response( 2478 ieee, (struct ieee80211_probe_response *)header, stats); 2479 break; 2480 2481 case IEEE80211_STYPE_PROBE_RESP: 2482 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", 2483 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2484 IEEE80211_DEBUG_SCAN("Probe response\n"); 2485 ieee80211_process_probe_response( 2486 ieee, (struct ieee80211_probe_response *)header, stats); 2487 break; 2488 2489 } 2490 } 2491 EXPORT_SYMBOL(ieee80211_rx_mgt); 2492