1 /* 2 * Original code based Host AP (software wireless LAN access point) driver 3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines 4 * 5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 6 * <jkmaline@cc.hut.fi> 7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> 8 * Copyright (c) 2004, Intel Corporation 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. See README and COPYING for 13 * more details. 14 ****************************************************************************** 15 16 Few modifications for Realtek's Wi-Fi drivers by 17 Andrea Merello <andrea.merello@gmail.com> 18 19 A special thanks goes to Realtek for their support ! 20 21 ******************************************************************************/ 22 23 24 #include <linux/compiler.h> 25 #include <linux/errno.h> 26 #include <linux/if_arp.h> 27 #include <linux/in6.h> 28 #include <linux/in.h> 29 #include <linux/ip.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/netdevice.h> 33 #include <linux/pci.h> 34 #include <linux/proc_fs.h> 35 #include <linux/skbuff.h> 36 #include <linux/slab.h> 37 #include <linux/tcp.h> 38 #include <linux/types.h> 39 #include <linux/wireless.h> 40 #include <linux/etherdevice.h> 41 #include <linux/uaccess.h> 42 #include <linux/ctype.h> 43 44 #include "ieee80211.h" 45 #include "dot11d.h" 46 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, 47 struct sk_buff *skb, 48 struct ieee80211_rx_stats *rx_stats) 49 { 50 struct rtl_80211_hdr_4addr *hdr = (struct rtl_80211_hdr_4addr *)skb->data; 51 u16 fc = le16_to_cpu(hdr->frame_ctl); 52 53 skb->dev = ieee->dev; 54 skb_reset_mac_header(skb); 55 56 skb_pull(skb, ieee80211_get_hdrlen(fc)); 57 skb->pkt_type = PACKET_OTHERHOST; 58 skb->protocol = htons(ETH_P_80211_RAW); 59 memset(skb->cb, 0, sizeof(skb->cb)); 60 netif_rx(skb); 61 } 62 63 64 /* Called only as a tasklet (software IRQ) */ 65 static struct ieee80211_frag_entry * 66 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq, 67 unsigned int frag, u8 tid, u8 *src, u8 *dst) 68 { 69 struct ieee80211_frag_entry *entry; 70 int i; 71 72 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { 73 entry = &ieee->frag_cache[tid][i]; 74 if (entry->skb != NULL && 75 time_after(jiffies, entry->first_frag_time + 2 * HZ)) { 76 IEEE80211_DEBUG_FRAG( 77 "expiring fragment cache entry " 78 "seq=%u last_frag=%u\n", 79 entry->seq, entry->last_frag); 80 dev_kfree_skb_any(entry->skb); 81 entry->skb = NULL; 82 } 83 84 if (entry->skb != NULL && entry->seq == seq && 85 (entry->last_frag + 1 == frag || frag == -1) && 86 memcmp(entry->src_addr, src, ETH_ALEN) == 0 && 87 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) 88 return entry; 89 } 90 91 return NULL; 92 } 93 94 /* Called only as a tasklet (software IRQ) */ 95 static struct sk_buff * 96 ieee80211_frag_cache_get(struct ieee80211_device *ieee, 97 struct rtl_80211_hdr_4addr *hdr) 98 { 99 struct sk_buff *skb = NULL; 100 u16 fc = le16_to_cpu(hdr->frame_ctl); 101 u16 sc = le16_to_cpu(hdr->seq_ctl); 102 unsigned int frag = WLAN_GET_SEQ_FRAG(sc); 103 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 104 struct ieee80211_frag_entry *entry; 105 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 106 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 107 u8 tid; 108 109 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { 110 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr; 111 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 112 tid = UP2AC(tid); 113 tid++; 114 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { 115 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr; 116 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 117 tid = UP2AC(tid); 118 tid++; 119 } else { 120 tid = 0; 121 } 122 123 if (frag == 0) { 124 /* Reserve enough space to fit maximum frame length */ 125 skb = dev_alloc_skb(ieee->dev->mtu + 126 sizeof(struct rtl_80211_hdr_4addr) + 127 8 /* LLC */ + 128 2 /* alignment */ + 129 8 /* WEP */ + 130 ETH_ALEN /* WDS */ + 131 (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */); 132 if (!skb) 133 return NULL; 134 135 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; 136 ieee->frag_next_idx[tid]++; 137 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN) 138 ieee->frag_next_idx[tid] = 0; 139 140 if (entry->skb != NULL) 141 dev_kfree_skb_any(entry->skb); 142 143 entry->first_frag_time = jiffies; 144 entry->seq = seq; 145 entry->last_frag = frag; 146 entry->skb = skb; 147 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); 148 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); 149 } else { 150 /* received a fragment of a frame for which the head fragment 151 * should have already been received */ 152 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2, 153 hdr->addr1); 154 if (entry != NULL) { 155 entry->last_frag = frag; 156 skb = entry->skb; 157 } 158 } 159 160 return skb; 161 } 162 163 164 /* Called only as a tasklet (software IRQ) */ 165 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, 166 struct rtl_80211_hdr_4addr *hdr) 167 { 168 u16 fc = le16_to_cpu(hdr->frame_ctl); 169 u16 sc = le16_to_cpu(hdr->seq_ctl); 170 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 171 struct ieee80211_frag_entry *entry; 172 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 173 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 174 u8 tid; 175 176 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { 177 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr; 178 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 179 tid = UP2AC(tid); 180 tid++; 181 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { 182 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr; 183 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 184 tid = UP2AC(tid); 185 tid++; 186 } else { 187 tid = 0; 188 } 189 190 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, 191 hdr->addr1); 192 193 if (entry == NULL) { 194 IEEE80211_DEBUG_FRAG( 195 "could not invalidate fragment cache " 196 "entry (seq=%u)\n", seq); 197 return -1; 198 } 199 200 entry->skb = NULL; 201 return 0; 202 } 203 204 205 206 /* ieee80211_rx_frame_mgtmt 207 * 208 * Responsible for handling management control frames 209 * 210 * Called by ieee80211_rx */ 211 static inline int 212 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, 213 struct ieee80211_rx_stats *rx_stats, u16 type, 214 u16 stype) 215 { 216 /* On the struct stats definition there is written that 217 * this is not mandatory.... but seems that the probe 218 * response parser uses it 219 */ 220 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data; 221 222 rx_stats->len = skb->len; 223 ieee80211_rx_mgt(ieee,(struct rtl_80211_hdr_4addr *)skb->data,rx_stats); 224 /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */ 225 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))/* use ADDR1 to perform address matching for Management frames */ 226 { 227 dev_kfree_skb_any(skb); 228 return 0; 229 } 230 231 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype); 232 233 dev_kfree_skb_any(skb); 234 235 return 0; 236 237 #ifdef NOT_YET 238 if (ieee->iw_mode == IW_MODE_MASTER) { 239 printk(KERN_DEBUG "%s: Master mode not yet supported.\n", 240 ieee->dev->name); 241 return 0; 242 /* 243 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *) 244 skb->data);*/ 245 } 246 247 if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) { 248 if (stype == WLAN_FC_STYPE_BEACON && 249 ieee->iw_mode == IW_MODE_MASTER) { 250 struct sk_buff *skb2; 251 /* Process beacon frames also in kernel driver to 252 * update STA(AP) table statistics */ 253 skb2 = skb_clone(skb, GFP_ATOMIC); 254 if (skb2) 255 hostap_rx(skb2->dev, skb2, rx_stats); 256 } 257 258 /* send management frames to the user space daemon for 259 * processing */ 260 ieee->apdevstats.rx_packets++; 261 ieee->apdevstats.rx_bytes += skb->len; 262 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); 263 return 0; 264 } 265 266 if (ieee->iw_mode == IW_MODE_MASTER) { 267 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { 268 printk(KERN_DEBUG "%s: unknown management frame " 269 "(type=0x%02x, stype=0x%02x) dropped\n", 270 skb->dev->name, type, stype); 271 return -1; 272 } 273 274 hostap_rx(skb->dev, skb, rx_stats); 275 return 0; 276 } 277 278 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " 279 "received in non-Host AP mode\n", skb->dev->name); 280 return -1; 281 #endif 282 } 283 284 285 286 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 287 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 288 static unsigned char rfc1042_header[] = 289 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 290 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 291 static unsigned char bridge_tunnel_header[] = 292 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 293 /* No encapsulation header if EtherType < 0x600 (=length) */ 294 295 /* Called by ieee80211_rx_frame_decrypt */ 296 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, 297 struct sk_buff *skb, size_t hdrlen) 298 { 299 struct net_device *dev = ieee->dev; 300 u16 fc, ethertype; 301 struct rtl_80211_hdr_4addr *hdr; 302 u8 *pos; 303 304 if (skb->len < 24) 305 return 0; 306 307 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 308 fc = le16_to_cpu(hdr->frame_ctl); 309 310 /* check that the frame is unicast frame to us */ 311 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 312 IEEE80211_FCTL_TODS && 313 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && 314 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { 315 /* ToDS frame with own addr BSSID and DA */ 316 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 317 IEEE80211_FCTL_FROMDS && 318 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { 319 /* FromDS frame with own addr as DA */ 320 } else 321 return 0; 322 323 if (skb->len < 24 + 8) 324 return 0; 325 326 /* check for port access entity Ethernet type */ 327 // pos = skb->data + 24; 328 pos = skb->data + hdrlen; 329 ethertype = (pos[6] << 8) | pos[7]; 330 if (ethertype == ETH_P_PAE) 331 return 1; 332 333 return 0; 334 } 335 336 /* Called only as a tasklet (software IRQ), by ieee80211_rx */ 337 static inline int 338 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, 339 struct ieee80211_crypt_data *crypt) 340 { 341 struct rtl_80211_hdr_4addr *hdr; 342 int res, hdrlen; 343 344 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) 345 return 0; 346 if (ieee->hwsec_active) 347 { 348 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE); 349 tcb_desc->bHwSec = 1; 350 } 351 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 352 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 353 354 if (ieee->tkip_countermeasures && 355 strcmp(crypt->ops->name, "TKIP") == 0) { 356 if (net_ratelimit()) { 357 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " 358 "received packet from %pM\n", 359 ieee->dev->name, hdr->addr2); 360 } 361 return -1; 362 } 363 364 atomic_inc(&crypt->refcnt); 365 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); 366 atomic_dec(&crypt->refcnt); 367 if (res < 0) { 368 IEEE80211_DEBUG_DROP( 369 "decryption failed (SA=%pM" 370 ") res=%d\n", hdr->addr2, res); 371 if (res == -2) 372 IEEE80211_DEBUG_DROP("Decryption failed ICV " 373 "mismatch (key %d)\n", 374 skb->data[hdrlen + 3] >> 6); 375 ieee->ieee_stats.rx_discards_undecryptable++; 376 return -1; 377 } 378 379 return res; 380 } 381 382 383 /* Called only as a tasklet (software IRQ), by ieee80211_rx */ 384 static inline int 385 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb, 386 int keyidx, struct ieee80211_crypt_data *crypt) 387 { 388 struct rtl_80211_hdr_4addr *hdr; 389 int res, hdrlen; 390 391 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) 392 return 0; 393 if (ieee->hwsec_active) 394 { 395 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE); 396 tcb_desc->bHwSec = 1; 397 } 398 399 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 400 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); 401 402 atomic_inc(&crypt->refcnt); 403 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); 404 atomic_dec(&crypt->refcnt); 405 if (res < 0) { 406 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" 407 " (SA=%pM keyidx=%d)\n", 408 ieee->dev->name, hdr->addr2, keyidx); 409 return -1; 410 } 411 412 return 0; 413 } 414 415 416 /* this function is stolen from ipw2200 driver*/ 417 #define IEEE_PACKET_RETRY_TIME (5*HZ) 418 static int is_duplicate_packet(struct ieee80211_device *ieee, 419 struct rtl_80211_hdr_4addr *header) 420 { 421 u16 fc = le16_to_cpu(header->frame_ctl); 422 u16 sc = le16_to_cpu(header->seq_ctl); 423 u16 seq = WLAN_GET_SEQ_SEQ(sc); 424 u16 frag = WLAN_GET_SEQ_FRAG(sc); 425 u16 *last_seq, *last_frag; 426 unsigned long *last_time; 427 struct rtl_80211_hdr_3addrqos *hdr_3addrqos; 428 struct rtl_80211_hdr_4addrqos *hdr_4addrqos; 429 u8 tid; 430 431 432 //TO2DS and QoS 433 if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { 434 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)header; 435 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID; 436 tid = UP2AC(tid); 437 tid++; 438 } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS 439 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header; 440 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID; 441 tid = UP2AC(tid); 442 tid++; 443 } else { // no QoS 444 tid = 0; 445 } 446 447 switch (ieee->iw_mode) { 448 case IW_MODE_ADHOC: 449 { 450 struct list_head *p; 451 struct ieee_ibss_seq *entry = NULL; 452 u8 *mac = header->addr2; 453 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; 454 455 list_for_each(p, &ieee->ibss_mac_hash[index]) { 456 entry = list_entry(p, struct ieee_ibss_seq, list); 457 if (!memcmp(entry->mac, mac, ETH_ALEN)) 458 break; 459 } 460 // if (memcmp(entry->mac, mac, ETH_ALEN)){ 461 if (p == &ieee->ibss_mac_hash[index]) { 462 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC); 463 if (!entry) 464 return 0; 465 memcpy(entry->mac, mac, ETH_ALEN); 466 entry->seq_num[tid] = seq; 467 entry->frag_num[tid] = frag; 468 entry->packet_time[tid] = jiffies; 469 list_add(&entry->list, &ieee->ibss_mac_hash[index]); 470 return 0; 471 } 472 last_seq = &entry->seq_num[tid]; 473 last_frag = &entry->frag_num[tid]; 474 last_time = &entry->packet_time[tid]; 475 break; 476 } 477 478 case IW_MODE_INFRA: 479 last_seq = &ieee->last_rxseq_num[tid]; 480 last_frag = &ieee->last_rxfrag_num[tid]; 481 last_time = &ieee->last_packet_time[tid]; 482 483 break; 484 default: 485 return 0; 486 } 487 488 // if(tid != 0) { 489 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl); 490 // } 491 if ((*last_seq == seq) && 492 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { 493 if (*last_frag == frag) 494 goto drop; 495 if (*last_frag + 1 != frag) 496 /* out-of-order fragment */ 497 goto drop; 498 } else 499 *last_seq = seq; 500 501 *last_frag = frag; 502 *last_time = jiffies; 503 return 0; 504 505 drop: 506 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY)); 507 508 return 1; 509 } 510 511 static bool AddReorderEntry(struct rx_ts_record *pTS, PRX_REORDER_ENTRY pReorderEntry) 512 { 513 struct list_head *pList = &pTS->rx_pending_pkt_list; 514 while(pList->next != &pTS->rx_pending_pkt_list) 515 { 516 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) ) 517 { 518 pList = pList->next; 519 } 520 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) ) 521 { 522 return false; 523 } 524 else 525 { 526 break; 527 } 528 } 529 pReorderEntry->List.next = pList->next; 530 pReorderEntry->List.next->prev = &pReorderEntry->List; 531 pReorderEntry->List.prev = pList; 532 pList->next = &pReorderEntry->List; 533 534 return true; 535 } 536 537 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray,u8 index) 538 { 539 u8 i = 0 , j=0; 540 u16 ethertype; 541 // if(index > 1) 542 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__func__,index); 543 for(j = 0; j<index; j++) 544 { 545 //added by amy for reorder 546 struct ieee80211_rxb *prxb = prxbIndicateArray[j]; 547 for(i = 0; i<prxb->nr_subframes; i++) { 548 struct sk_buff *sub_skb = prxb->subframes[i]; 549 550 /* convert hdr + possible LLC headers into Ethernet header */ 551 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 552 if (sub_skb->len >= 8 && 553 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && 554 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 555 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { 556 /* remove RFC1042 or Bridge-Tunnel encapsulation and 557 * replace EtherType */ 558 skb_pull(sub_skb, SNAP_SIZE); 559 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 560 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 561 } else { 562 /* Leave Ethernet header part of hdr and full payload */ 563 put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2)); 564 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 565 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 566 } 567 //stats->rx_packets++; 568 //stats->rx_bytes += sub_skb->len; 569 570 /* Indicat the packets to upper layer */ 571 if (sub_skb) { 572 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev); 573 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 574 sub_skb->dev = ieee->dev; 575 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ 576 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */ 577 ieee->last_rx_ps_time = jiffies; 578 netif_rx(sub_skb); 579 } 580 } 581 kfree(prxb); 582 prxb = NULL; 583 } 584 } 585 586 587 static void RxReorderIndicatePacket(struct ieee80211_device *ieee, 588 struct ieee80211_rxb *prxb, 589 struct rx_ts_record *pTS, u16 SeqNum) 590 { 591 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 592 PRX_REORDER_ENTRY pReorderEntry = NULL; 593 struct ieee80211_rxb **prxbIndicateArray; 594 u8 WinSize = pHTInfo->RxReorderWinSize; 595 u16 WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096; 596 u8 index = 0; 597 bool bMatchWinStart = false, bPktInBuf = false; 598 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); 599 600 prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE, 601 sizeof(struct ieee80211_rxb *), 602 GFP_KERNEL); 603 if (!prxbIndicateArray) 604 return; 605 606 /* Rx Reorder initialize condition.*/ 607 if (pTS->rx_indicate_seq == 0xffff) { 608 pTS->rx_indicate_seq = SeqNum; 609 } 610 611 /* Drop out the packet which SeqNum is smaller than WinStart */ 612 if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) { 613 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n", 614 pTS->rx_indicate_seq, SeqNum); 615 pHTInfo->RxReorderDropCounter++; 616 { 617 int i; 618 for(i =0; i < prxb->nr_subframes; i++) { 619 dev_kfree_skb(prxb->subframes[i]); 620 } 621 kfree(prxb); 622 prxb = NULL; 623 } 624 625 kfree(prxbIndicateArray); 626 return; 627 } 628 629 /* 630 * Sliding window manipulation. Conditions includes: 631 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 632 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N 633 */ 634 if(SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) { 635 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096; 636 bMatchWinStart = true; 637 } else if(SN_LESS(WinEnd, SeqNum)) { 638 if(SeqNum >= (WinSize - 1)) { 639 pTS->rx_indicate_seq = SeqNum + 1 -WinSize; 640 } else { 641 pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1; 642 } 643 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum); 644 } 645 646 /* 647 * Indication process. 648 * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets 649 * with the SeqNum smaller than latest WinStart and buffer other packets. 650 */ 651 /* For Rx Reorder condition: 652 * 1. All packets with SeqNum smaller than WinStart => Indicate 653 * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. 654 */ 655 if(bMatchWinStart) { 656 /* Current packet is going to be indicated.*/ 657 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\ 658 pTS->rx_indicate_seq, SeqNum); 659 prxbIndicateArray[0] = prxb; 660 // printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum); 661 index = 1; 662 } else { 663 /* Current packet is going to be inserted into pending list.*/ 664 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__); 665 if(!list_empty(&ieee->RxReorder_Unused_List)) { 666 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List); 667 list_del_init(&pReorderEntry->List); 668 669 /* Make a reorder entry and insert into a the packet list.*/ 670 pReorderEntry->SeqNum = SeqNum; 671 pReorderEntry->prxb = prxb; 672 // IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum); 673 674 if(!AddReorderEntry(pTS, pReorderEntry)) { 675 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n", 676 __func__, pTS->rx_indicate_seq, SeqNum); 677 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List); 678 { 679 int i; 680 for(i =0; i < prxb->nr_subframes; i++) { 681 dev_kfree_skb(prxb->subframes[i]); 682 } 683 kfree(prxb); 684 prxb = NULL; 685 } 686 } else { 687 IEEE80211_DEBUG(IEEE80211_DL_REORDER, 688 "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum); 689 } 690 } 691 else { 692 /* 693 * Packets are dropped if there is not enough reorder entries. 694 * This part shall be modified!! We can just indicate all the 695 * packets in buffer and get reorder entries. 696 */ 697 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n"); 698 { 699 int i; 700 for(i =0; i < prxb->nr_subframes; i++) { 701 dev_kfree_skb(prxb->subframes[i]); 702 } 703 kfree(prxb); 704 prxb = NULL; 705 } 706 } 707 } 708 709 /* Check if there is any packet need indicate.*/ 710 while(!list_empty(&pTS->rx_pending_pkt_list)) { 711 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__func__); 712 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->rx_pending_pkt_list.prev,RX_REORDER_ENTRY,List); 713 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) || 714 SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) 715 { 716 /* This protect buffer from overflow. */ 717 if (index >= REORDER_WIN_SIZE) { 718 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n"); 719 bPktInBuf = true; 720 break; 721 } 722 723 list_del_init(&pReorderEntry->List); 724 725 if(SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) 726 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096; 727 728 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum); 729 prxbIndicateArray[index] = pReorderEntry->prxb; 730 // printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum); 731 index++; 732 733 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List); 734 } else { 735 bPktInBuf = true; 736 break; 737 } 738 } 739 740 /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/ 741 if (index>0) { 742 // Cancel previous pending timer. 743 // del_timer_sync(&pTS->rx_pkt_pending_timer); 744 pTS->rx_timeout_indicate_seq = 0xffff; 745 746 // Indicate packets 747 if(index>REORDER_WIN_SIZE){ 748 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n"); 749 kfree(prxbIndicateArray); 750 return; 751 } 752 ieee80211_indicate_packets(ieee, prxbIndicateArray, index); 753 } 754 755 if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) { 756 // Set new pending timer. 757 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __func__); 758 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq; 759 if(timer_pending(&pTS->rx_pkt_pending_timer)) 760 del_timer_sync(&pTS->rx_pkt_pending_timer); 761 pTS->rx_pkt_pending_timer.expires = jiffies + 762 msecs_to_jiffies(pHTInfo->RxReorderPendingTime); 763 add_timer(&pTS->rx_pkt_pending_timer); 764 } 765 766 kfree(prxbIndicateArray); 767 } 768 769 static u8 parse_subframe(struct sk_buff *skb, 770 struct ieee80211_rx_stats *rx_stats, 771 struct ieee80211_rxb *rxb, u8 *src, u8 *dst) 772 { 773 struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data; 774 u16 fc = le16_to_cpu(hdr->frame_ctl); 775 776 u16 LLCOffset= sizeof(struct rtl_80211_hdr_3addr); 777 u16 ChkLength; 778 bool bIsAggregateFrame = false; 779 u16 nSubframe_Length; 780 u8 nPadding_Length = 0; 781 u16 SeqNum=0; 782 783 struct sk_buff *sub_skb; 784 /* just for debug purpose */ 785 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl)); 786 787 if ((IEEE80211_QOS_HAS_SEQ(fc))&&\ 788 (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) { 789 bIsAggregateFrame = true; 790 } 791 792 if (IEEE80211_QOS_HAS_SEQ(fc)) { 793 LLCOffset += 2; 794 } 795 796 if (rx_stats->bContainHTC) { 797 LLCOffset += HTCLNG; 798 } 799 // Null packet, don't indicate it to upper layer 800 ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/ 801 802 if (skb->len <= ChkLength) 803 return 0; 804 805 skb_pull(skb, LLCOffset); 806 807 if(!bIsAggregateFrame) { 808 rxb->nr_subframes = 1; 809 #ifdef JOHN_NOCPY 810 rxb->subframes[0] = skb; 811 #else 812 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC); 813 #endif 814 815 memcpy(rxb->src,src,ETH_ALEN); 816 memcpy(rxb->dst,dst,ETH_ALEN); 817 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len); 818 return 1; 819 } else { 820 rxb->nr_subframes = 0; 821 memcpy(rxb->src,src,ETH_ALEN); 822 memcpy(rxb->dst,dst,ETH_ALEN); 823 while(skb->len > ETHERNET_HEADER_SIZE) { 824 /* Offset 12 denote 2 mac address */ 825 nSubframe_Length = *((u16 *)(skb->data + 12)); 826 //==m==>change the length order 827 nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8); 828 829 if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) { 830 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\ 831 __func__, rxb->nr_subframes); 832 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length); 833 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length); 834 printk("The Packet SeqNum is %d\n",SeqNum); 835 return 0; 836 } 837 838 /* move the data point to data content */ 839 skb_pull(skb, ETHERNET_HEADER_SIZE); 840 841 #ifdef JOHN_NOCPY 842 sub_skb = skb_clone(skb, GFP_ATOMIC); 843 sub_skb->len = nSubframe_Length; 844 sub_skb->tail = sub_skb->data + nSubframe_Length; 845 #else 846 /* Allocate new skb for releasing to upper layer */ 847 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 848 if (!sub_skb) 849 return 0; 850 skb_reserve(sub_skb, 12); 851 skb_put_data(sub_skb, skb->data, nSubframe_Length); 852 #endif 853 rxb->subframes[rxb->nr_subframes++] = sub_skb; 854 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 855 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n"); 856 break; 857 } 858 skb_pull(skb, nSubframe_Length); 859 860 if (skb->len != 0) { 861 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4); 862 if (nPadding_Length == 4) { 863 nPadding_Length = 0; 864 } 865 866 if (skb->len < nPadding_Length) { 867 return 0; 868 } 869 870 skb_pull(skb, nPadding_Length); 871 } 872 } 873 #ifdef JOHN_NOCPY 874 dev_kfree_skb(skb); 875 #endif 876 //{just for debug added by david 877 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes); 878 //} 879 return rxb->nr_subframes; 880 } 881 } 882 883 /* All received frames are sent to this function. @skb contains the frame in 884 * IEEE 802.11 format, i.e., in the format it was sent over air. 885 * This function is called only as a tasklet (software IRQ). */ 886 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, 887 struct ieee80211_rx_stats *rx_stats) 888 { 889 struct net_device *dev = ieee->dev; 890 struct rtl_80211_hdr_4addr *hdr; 891 //struct rtl_80211_hdr_3addrqos *hdr; 892 893 size_t hdrlen; 894 u16 fc, type, stype, sc; 895 struct net_device_stats *stats; 896 unsigned int frag; 897 u16 ethertype; 898 //added by amy for reorder 899 u8 TID = 0; 900 u16 SeqNum = 0; 901 struct rx_ts_record *pTS = NULL; 902 //bool bIsAggregateFrame = false; 903 //added by amy for reorder 904 #ifdef NOT_YET 905 struct net_device *wds = NULL; 906 struct net_device *wds = NULL; 907 int from_assoc_ap = 0; 908 void *sta = NULL; 909 #endif 910 // u16 qos_ctl = 0; 911 u8 dst[ETH_ALEN]; 912 u8 src[ETH_ALEN]; 913 u8 bssid[ETH_ALEN]; 914 struct ieee80211_crypt_data *crypt = NULL; 915 int keyidx = 0; 916 917 int i; 918 struct ieee80211_rxb *rxb = NULL; 919 // cheat the hdr type 920 hdr = (struct rtl_80211_hdr_4addr *)skb->data; 921 stats = &ieee->stats; 922 923 if (skb->len < 10) { 924 printk(KERN_INFO "%s: SKB length < 10\n", 925 dev->name); 926 goto rx_dropped; 927 } 928 929 fc = le16_to_cpu(hdr->frame_ctl); 930 type = WLAN_FC_GET_TYPE(fc); 931 stype = WLAN_FC_GET_STYPE(fc); 932 sc = le16_to_cpu(hdr->seq_ctl); 933 934 frag = WLAN_GET_SEQ_FRAG(sc); 935 hdrlen = ieee80211_get_hdrlen(fc); 936 937 if (HTCCheck(ieee, skb->data)) 938 { 939 if(net_ratelimit()) 940 printk("find HTCControl\n"); 941 hdrlen += 4; 942 rx_stats->bContainHTC = true; 943 } 944 945 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 946 #ifdef NOT_YET 947 /* Put this code here so that we avoid duplicating it in all 948 * Rx paths. - Jean II */ 949 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ 950 /* If spy monitoring on */ 951 if (iface->spy_data.spy_number > 0) { 952 struct iw_quality wstats; 953 wstats.level = rx_stats->rssi; 954 wstats.noise = rx_stats->noise; 955 wstats.updated = 6; /* No qual value */ 956 /* Update spy records */ 957 wireless_spy_update(dev, hdr->addr2, &wstats); 958 } 959 #endif /* IW_WIRELESS_SPY */ 960 hostap_update_rx_stats(local->ap, hdr, rx_stats); 961 #endif 962 963 if (ieee->iw_mode == IW_MODE_MONITOR) { 964 ieee80211_monitor_rx(ieee, skb, rx_stats); 965 stats->rx_packets++; 966 stats->rx_bytes += skb->len; 967 return 1; 968 } 969 970 if (ieee->host_decrypt) { 971 int idx = 0; 972 if (skb->len >= hdrlen + 3) 973 idx = skb->data[hdrlen + 3] >> 6; 974 crypt = ieee->crypt[idx]; 975 #ifdef NOT_YET 976 sta = NULL; 977 978 /* Use station specific key to override default keys if the 979 * receiver address is a unicast address ("individual RA"). If 980 * bcrx_sta_key parameter is set, station specific key is used 981 * even with broad/multicast targets (this is against IEEE 982 * 802.11, but makes it easier to use different keys with 983 * stations that do not support WEP key mapping). */ 984 985 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) 986 (void) hostap_handle_sta_crypto(local, hdr, &crypt, 987 &sta); 988 #endif 989 990 /* allow NULL decrypt to indicate an station specific override 991 * for default encryption */ 992 if (crypt && (crypt->ops == NULL || 993 crypt->ops->decrypt_mpdu == NULL)) 994 crypt = NULL; 995 996 if (!crypt && (fc & IEEE80211_FCTL_WEP)) { 997 /* This seems to be triggered by some (multicast?) 998 * frames from other than current BSS, so just drop the 999 * frames silently instead of filling system log with 1000 * these reports. */ 1001 IEEE80211_DEBUG_DROP("Decryption failed (not set)" 1002 " (SA=%pM)\n", 1003 hdr->addr2); 1004 ieee->ieee_stats.rx_discards_undecryptable++; 1005 goto rx_dropped; 1006 } 1007 } 1008 1009 if (skb->len < IEEE80211_DATA_HDR3_LEN) 1010 goto rx_dropped; 1011 1012 // if QoS enabled, should check the sequence for each of the AC 1013 if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) { 1014 if (is_duplicate_packet(ieee, hdr)) 1015 goto rx_dropped; 1016 1017 } 1018 else 1019 { 1020 struct rx_ts_record *pRxTS = NULL; 1021 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid); 1022 if(GetTs( 1023 ieee, 1024 (struct ts_common_info **) &pRxTS, 1025 hdr->addr2, 1026 Frame_QoSTID((u8 *)(skb->data)), 1027 RX_DIR, 1028 true)) 1029 { 1030 1031 // 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)); 1032 if ((fc & (1<<11)) && 1033 (frag == pRxTS->rx_last_frag_num) && 1034 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) { 1035 goto rx_dropped; 1036 } 1037 else 1038 { 1039 pRxTS->rx_last_frag_num = frag; 1040 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc); 1041 } 1042 } 1043 else 1044 { 1045 IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__func__); 1046 goto rx_dropped; 1047 } 1048 } 1049 if (type == IEEE80211_FTYPE_MGMT) { 1050 1051 1052 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1053 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1054 goto rx_dropped; 1055 else 1056 goto rx_exit; 1057 } 1058 1059 /* Data frame - extract src/dst addresses */ 1060 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { 1061 case IEEE80211_FCTL_FROMDS: 1062 memcpy(dst, hdr->addr1, ETH_ALEN); 1063 memcpy(src, hdr->addr3, ETH_ALEN); 1064 memcpy(bssid, hdr->addr2, ETH_ALEN); 1065 break; 1066 case IEEE80211_FCTL_TODS: 1067 memcpy(dst, hdr->addr3, ETH_ALEN); 1068 memcpy(src, hdr->addr2, ETH_ALEN); 1069 memcpy(bssid, hdr->addr1, ETH_ALEN); 1070 break; 1071 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: 1072 if (skb->len < IEEE80211_DATA_HDR4_LEN) 1073 goto rx_dropped; 1074 memcpy(dst, hdr->addr3, ETH_ALEN); 1075 memcpy(src, hdr->addr4, ETH_ALEN); 1076 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); 1077 break; 1078 default: 1079 memcpy(dst, hdr->addr1, ETH_ALEN); 1080 memcpy(src, hdr->addr2, ETH_ALEN); 1081 memcpy(bssid, hdr->addr3, ETH_ALEN); 1082 break; 1083 } 1084 1085 #ifdef NOT_YET 1086 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) 1087 goto rx_dropped; 1088 if (wds) { 1089 skb->dev = dev = wds; 1090 stats = hostap_get_stats(dev); 1091 } 1092 1093 if (ieee->iw_mode == IW_MODE_MASTER && !wds && 1094 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS && 1095 ieee->stadev && 1096 memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { 1097 /* Frame from BSSID of the AP for which we are a client */ 1098 skb->dev = dev = ieee->stadev; 1099 stats = hostap_get_stats(dev); 1100 from_assoc_ap = 1; 1101 } 1102 1103 if ((ieee->iw_mode == IW_MODE_MASTER || 1104 ieee->iw_mode == IW_MODE_REPEAT) && 1105 !from_assoc_ap) { 1106 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, 1107 wds != NULL)) { 1108 case AP_RX_CONTINUE_NOT_AUTHORIZED: 1109 case AP_RX_CONTINUE: 1110 break; 1111 case AP_RX_DROP: 1112 goto rx_dropped; 1113 case AP_RX_EXIT: 1114 goto rx_exit; 1115 } 1116 } 1117 #endif 1118 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 1119 /* Nullfunc frames may have PS-bit set, so they must be passed to 1120 * hostap_handle_sta_rx() before being dropped here. */ 1121 if (stype != IEEE80211_STYPE_DATA && 1122 stype != IEEE80211_STYPE_DATA_CFACK && 1123 stype != IEEE80211_STYPE_DATA_CFPOLL && 1124 stype != IEEE80211_STYPE_DATA_CFACKPOLL&& 1125 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4 1126 ) { 1127 if (stype != IEEE80211_STYPE_NULLFUNC) 1128 IEEE80211_DEBUG_DROP( 1129 "RX: dropped data frame " 1130 "with no data (type=0x%02x, " 1131 "subtype=0x%02x, len=%d)\n", 1132 type, stype, skb->len); 1133 goto rx_dropped; 1134 } 1135 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) 1136 goto rx_dropped; 1137 1138 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ 1139 1140 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1141 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) 1142 { 1143 printk("decrypt frame error\n"); 1144 goto rx_dropped; 1145 } 1146 1147 1148 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 1149 1150 /* skb: hdr + (possibly fragmented) plaintext payload */ 1151 // PR: FIXME: hostap has additional conditions in the "if" below: 1152 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1153 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1154 int flen; 1155 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); 1156 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); 1157 1158 if (!frag_skb) { 1159 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, 1160 "Rx cannot get skb from fragment " 1161 "cache (morefrag=%d seq=%u frag=%u)\n", 1162 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1163 WLAN_GET_SEQ_SEQ(sc), frag); 1164 goto rx_dropped; 1165 } 1166 flen = skb->len; 1167 if (frag != 0) 1168 flen -= hdrlen; 1169 1170 if (frag_skb->tail + flen > frag_skb->end) { 1171 printk(KERN_WARNING "%s: host decrypted and " 1172 "reassembled frame did not fit skb\n", 1173 dev->name); 1174 ieee80211_frag_cache_invalidate(ieee, hdr); 1175 goto rx_dropped; 1176 } 1177 1178 if (frag == 0) { 1179 /* copy first fragment (including full headers) into 1180 * beginning of the fragment cache skb */ 1181 skb_put_data(frag_skb, skb->data, flen); 1182 } else { 1183 /* append frame payload to the end of the fragment 1184 * cache skb */ 1185 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1186 } 1187 dev_kfree_skb_any(skb); 1188 skb = NULL; 1189 1190 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1191 /* more fragments expected - leave the skb in fragment 1192 * cache for now; it will be delivered to upper layers 1193 * after all fragments have been received */ 1194 goto rx_exit; 1195 } 1196 1197 /* this was the last fragment and the frame will be 1198 * delivered, so remove skb from fragment cache */ 1199 skb = frag_skb; 1200 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 1201 ieee80211_frag_cache_invalidate(ieee, hdr); 1202 } 1203 1204 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1205 * encrypted/authenticated */ 1206 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && 1207 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) 1208 { 1209 printk("==>decrypt msdu error\n"); 1210 goto rx_dropped; 1211 } 1212 1213 //added by amy for AP roaming 1214 ieee->LinkDetectInfo.NumRecvDataInPeriod++; 1215 ieee->LinkDetectInfo.NumRxOkInPeriod++; 1216 1217 hdr = (struct rtl_80211_hdr_4addr *) skb->data; 1218 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { 1219 if (/*ieee->ieee802_1x &&*/ 1220 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1221 1222 #ifdef CONFIG_IEEE80211_DEBUG 1223 /* pass unencrypted EAPOL frames even if encryption is 1224 * configured */ 1225 struct eapol *eap = (struct eapol *)(skb->data + 1226 24); 1227 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1228 eap_get_type(eap->type)); 1229 #endif 1230 } else { 1231 IEEE80211_DEBUG_DROP( 1232 "encryption configured, but RX " 1233 "frame not encrypted (SA=%pM)\n", 1234 hdr->addr2); 1235 goto rx_dropped; 1236 } 1237 } 1238 1239 #ifdef CONFIG_IEEE80211_DEBUG 1240 if (crypt && !(fc & IEEE80211_FCTL_WEP) && 1241 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1242 struct eapol *eap = (struct eapol *)(skb->data + 1243 24); 1244 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", 1245 eap_get_type(eap->type)); 1246 } 1247 #endif 1248 1249 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && 1250 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1251 IEEE80211_DEBUG_DROP( 1252 "dropped unencrypted RX data " 1253 "frame from %pM" 1254 " (drop_unencrypted=1)\n", 1255 hdr->addr2); 1256 goto rx_dropped; 1257 } 1258 /* 1259 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { 1260 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); 1261 } 1262 */ 1263 //added by amy for reorder 1264 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1265 && !is_multicast_ether_addr(hdr->addr1)) 1266 { 1267 TID = Frame_QoSTID(skb->data); 1268 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1269 GetTs(ieee,(struct ts_common_info **) &pTS,hdr->addr2,TID,RX_DIR,true); 1270 if (TID !=0 && TID !=3) 1271 { 1272 ieee->bis_any_nonbepkts = true; 1273 } 1274 } 1275 //added by amy for reorder 1276 /* skb: hdr + (possible reassembled) full plaintext payload */ 1277 //ethertype = (payload[6] << 8) | payload[7]; 1278 rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC); 1279 if (!rxb) 1280 goto rx_dropped; 1281 /* to parse amsdu packets */ 1282 /* qos data packets & reserved bit is 1 */ 1283 if (parse_subframe(skb, rx_stats, rxb, src, dst) == 0) { 1284 /* only to free rxb, and not submit the packets to upper layer */ 1285 for(i =0; i < rxb->nr_subframes; i++) { 1286 dev_kfree_skb(rxb->subframes[i]); 1287 } 1288 kfree(rxb); 1289 rxb = NULL; 1290 goto rx_dropped; 1291 } 1292 1293 //added by amy for reorder 1294 if (!ieee->pHTInfo->bCurRxReorderEnable || pTS == NULL){ 1295 //added by amy for reorder 1296 for(i = 0; i<rxb->nr_subframes; i++) { 1297 struct sk_buff *sub_skb = rxb->subframes[i]; 1298 1299 if (sub_skb) { 1300 /* convert hdr + possible LLC headers into Ethernet header */ 1301 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 1302 if (sub_skb->len >= 8 && 1303 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && 1304 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 1305 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { 1306 /* remove RFC1042 or Bridge-Tunnel encapsulation and 1307 * replace EtherType */ 1308 skb_pull(sub_skb, SNAP_SIZE); 1309 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); 1310 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); 1311 } else { 1312 u16 len; 1313 /* Leave Ethernet header part of hdr and full payload */ 1314 len = be16_to_cpu(htons(sub_skb->len)); 1315 memcpy(skb_push(sub_skb, 2), &len, 2); 1316 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); 1317 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); 1318 } 1319 1320 stats->rx_packets++; 1321 stats->rx_bytes += sub_skb->len; 1322 if (is_multicast_ether_addr(dst)) { 1323 stats->multicast++; 1324 } 1325 1326 /* Indicat the packets to upper layer */ 1327 sub_skb->protocol = eth_type_trans(sub_skb, dev); 1328 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 1329 sub_skb->dev = dev; 1330 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ 1331 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */ 1332 ieee->last_rx_ps_time = jiffies; 1333 netif_rx(sub_skb); 1334 } 1335 } 1336 kfree(rxb); 1337 rxb = NULL; 1338 1339 } 1340 else 1341 { 1342 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__func__); 1343 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); 1344 } 1345 #ifndef JOHN_NOCPY 1346 dev_kfree_skb(skb); 1347 #endif 1348 1349 rx_exit: 1350 #ifdef NOT_YET 1351 if (sta) 1352 hostap_handle_sta_release(sta); 1353 #endif 1354 return 1; 1355 1356 rx_dropped: 1357 kfree(rxb); 1358 rxb = NULL; 1359 stats->rx_dropped++; 1360 1361 /* Returning 0 indicates to caller that we have not handled the SKB-- 1362 * so it is still allocated and can be used again by underlying 1363 * hardware as a DMA target */ 1364 return 0; 1365 } 1366 EXPORT_SYMBOL(ieee80211_rx); 1367 1368 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 1369 1370 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1371 1372 /* 1373 * Make the structure we read from the beacon packet to have 1374 * the right values 1375 */ 1376 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element 1377 *info_element, int sub_type) 1378 { 1379 1380 if (info_element->qui_subtype != sub_type) 1381 return -1; 1382 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1383 return -1; 1384 if (info_element->qui_type != QOS_OUI_TYPE) 1385 return -1; 1386 if (info_element->version != QOS_VERSION_1) 1387 return -1; 1388 1389 return 0; 1390 } 1391 1392 1393 /* 1394 * Parse a QoS parameter element 1395 */ 1396 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info 1397 *element_param, struct ieee80211_info_element 1398 *info_element) 1399 { 1400 int ret = 0; 1401 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2; 1402 1403 if ((info_element == NULL) || (element_param == NULL)) 1404 return -1; 1405 1406 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { 1407 memcpy(element_param->info_element.qui, info_element->data, 1408 info_element->len); 1409 element_param->info_element.elementID = info_element->id; 1410 element_param->info_element.length = info_element->len; 1411 } else 1412 ret = -1; 1413 if (ret == 0) 1414 ret = ieee80211_verify_qos_info(&element_param->info_element, 1415 QOS_OUI_PARAM_SUB_TYPE); 1416 return ret; 1417 } 1418 1419 /* 1420 * Parse a QoS information element 1421 */ 1422 static int ieee80211_read_qos_info_element(struct 1423 ieee80211_qos_information_element 1424 *element_info, struct ieee80211_info_element 1425 *info_element) 1426 { 1427 int ret = 0; 1428 u16 size = sizeof(struct ieee80211_qos_information_element) - 2; 1429 1430 if (element_info == NULL) 1431 return -1; 1432 if (info_element == NULL) 1433 return -1; 1434 1435 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { 1436 memcpy(element_info->qui, info_element->data, 1437 info_element->len); 1438 element_info->elementID = info_element->id; 1439 element_info->length = info_element->len; 1440 } else 1441 ret = -1; 1442 1443 if (ret == 0) 1444 ret = ieee80211_verify_qos_info(element_info, 1445 QOS_OUI_INFO_SUB_TYPE); 1446 return ret; 1447 } 1448 1449 1450 /* 1451 * Write QoS parameters from the ac parameters. 1452 */ 1453 static int ieee80211_qos_convert_ac_to_parameters(struct 1454 ieee80211_qos_parameter_info 1455 *param_elm, struct 1456 ieee80211_qos_parameters 1457 *qos_param) 1458 { 1459 int i; 1460 struct ieee80211_qos_ac_parameter *ac_params; 1461 u8 aci; 1462 //u8 cw_min; 1463 //u8 cw_max; 1464 1465 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1466 ac_params = &(param_elm->ac_params_record[i]); 1467 1468 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1469 1470 if(aci >= QOS_QUEUE_NUM) 1471 continue; 1472 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1473 1474 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1475 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci]; 1476 1477 qos_param->cw_min[aci] = 1478 cpu_to_le16(ac_params->ecw_min_max & 0x0F); 1479 1480 qos_param->cw_max[aci] = 1481 cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4); 1482 1483 qos_param->flag[aci] = 1484 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1485 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1486 } 1487 return 0; 1488 } 1489 1490 /* 1491 * we have a generic data element which it may contain QoS information or 1492 * parameters element. check the information element length to decide 1493 * which type to read 1494 */ 1495 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element 1496 *info_element, 1497 struct ieee80211_network *network) 1498 { 1499 int rc = 0; 1500 struct ieee80211_qos_parameters *qos_param = NULL; 1501 struct ieee80211_qos_information_element qos_info_element; 1502 1503 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); 1504 1505 if (rc == 0) { 1506 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1507 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1508 } else { 1509 struct ieee80211_qos_parameter_info param_element; 1510 1511 rc = ieee80211_read_qos_param_element(¶m_element, 1512 info_element); 1513 if (rc == 0) { 1514 qos_param = &(network->qos_data.parameters); 1515 ieee80211_qos_convert_ac_to_parameters(¶m_element, 1516 qos_param); 1517 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1518 network->qos_data.param_count = 1519 param_element.info_element.ac_info & 0x0F; 1520 } 1521 } 1522 1523 if (rc == 0) { 1524 IEEE80211_DEBUG_QOS("QoS is supported\n"); 1525 network->qos_data.supported = 1; 1526 } 1527 return rc; 1528 } 1529 1530 #ifdef CONFIG_IEEE80211_DEBUG 1531 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x 1532 1533 static const char *get_info_element_string(u16 id) 1534 { 1535 switch (id) { 1536 MFIE_STRING(SSID); 1537 MFIE_STRING(RATES); 1538 MFIE_STRING(FH_SET); 1539 MFIE_STRING(DS_SET); 1540 MFIE_STRING(CF_SET); 1541 MFIE_STRING(TIM); 1542 MFIE_STRING(IBSS_SET); 1543 MFIE_STRING(COUNTRY); 1544 MFIE_STRING(HOP_PARAMS); 1545 MFIE_STRING(HOP_TABLE); 1546 MFIE_STRING(REQUEST); 1547 MFIE_STRING(CHALLENGE); 1548 MFIE_STRING(POWER_CONSTRAINT); 1549 MFIE_STRING(POWER_CAPABILITY); 1550 MFIE_STRING(TPC_REQUEST); 1551 MFIE_STRING(TPC_REPORT); 1552 MFIE_STRING(SUPP_CHANNELS); 1553 MFIE_STRING(CSA); 1554 MFIE_STRING(MEASURE_REQUEST); 1555 MFIE_STRING(MEASURE_REPORT); 1556 MFIE_STRING(QUIET); 1557 MFIE_STRING(IBSS_DFS); 1558 // MFIE_STRING(ERP_INFO); 1559 MFIE_STRING(RSN); 1560 MFIE_STRING(RATES_EX); 1561 MFIE_STRING(GENERIC); 1562 MFIE_STRING(QOS_PARAMETER); 1563 default: 1564 return "UNKNOWN"; 1565 } 1566 } 1567 #endif 1568 1569 static inline void ieee80211_extract_country_ie( 1570 struct ieee80211_device *ieee, 1571 struct ieee80211_info_element *info_element, 1572 struct ieee80211_network *network, 1573 u8 *addr2 1574 ) 1575 { 1576 if (IS_DOT11D_ENABLE(ieee)) 1577 { 1578 if (info_element->len!= 0) 1579 { 1580 memcpy(network->CountryIeBuf, info_element->data, info_element->len); 1581 network->CountryIeLen = info_element->len; 1582 1583 if (!IS_COUNTRY_IE_VALID(ieee)) 1584 { 1585 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data); 1586 } 1587 } 1588 1589 // 1590 // 070305, rcnjko: I update country IE watch dog here because 1591 // some AP (e.g. Cisco 1242) don't include country IE in their 1592 // probe response frame. 1593 // 1594 if (IS_EQUAL_CIE_SRC(ieee, addr2) ) 1595 { 1596 UPDATE_CIE_WATCHDOG(ieee); 1597 } 1598 } 1599 1600 } 1601 1602 int ieee80211_parse_info_param(struct ieee80211_device *ieee, 1603 struct ieee80211_info_element *info_element, 1604 u16 length, 1605 struct ieee80211_network *network, 1606 struct ieee80211_rx_stats *stats) 1607 { 1608 u8 i; 1609 short offset; 1610 u16 tmp_htcap_len=0; 1611 u16 tmp_htinfo_len=0; 1612 u16 ht_realtek_agg_len=0; 1613 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1614 // u16 broadcom_len = 0; 1615 #ifdef CONFIG_IEEE80211_DEBUG 1616 char rates_str[64]; 1617 char *p; 1618 #endif 1619 1620 while (length >= sizeof(*info_element)) { 1621 if (sizeof(*info_element) + info_element->len > length) { 1622 IEEE80211_DEBUG_MGMT("Info elem: parse failed: " 1623 "info_element->len + 2 > left : " 1624 "info_element->len+2=%zd left=%d, id=%d.\n", 1625 info_element->len + 1626 sizeof(*info_element), 1627 length, info_element->id); 1628 /* We stop processing but don't return an error here 1629 * because some misbehaviour APs break this rule. ie. 1630 * Orinoco AP1000. */ 1631 break; 1632 } 1633 1634 switch (info_element->id) { 1635 case MFIE_TYPE_SSID: 1636 if (ieee80211_is_empty_essid(info_element->data, 1637 info_element->len)) { 1638 network->flags |= NETWORK_EMPTY_ESSID; 1639 break; 1640 } 1641 1642 network->ssid_len = min(info_element->len, 1643 (u8) IW_ESSID_MAX_SIZE); 1644 memcpy(network->ssid, info_element->data, network->ssid_len); 1645 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1646 memset(network->ssid + network->ssid_len, 0, 1647 IW_ESSID_MAX_SIZE - network->ssid_len); 1648 1649 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", 1650 network->ssid, network->ssid_len); 1651 break; 1652 1653 case MFIE_TYPE_RATES: 1654 #ifdef CONFIG_IEEE80211_DEBUG 1655 p = rates_str; 1656 #endif 1657 network->rates_len = min(info_element->len, 1658 MAX_RATES_LENGTH); 1659 for (i = 0; i < network->rates_len; i++) { 1660 network->rates[i] = info_element->data[i]; 1661 #ifdef CONFIG_IEEE80211_DEBUG 1662 p += snprintf(p, sizeof(rates_str) - 1663 (p - rates_str), "%02X ", 1664 network->rates[i]); 1665 #endif 1666 if (ieee80211_is_ofdm_rate 1667 (info_element->data[i])) { 1668 network->flags |= NETWORK_HAS_OFDM; 1669 if (info_element->data[i] & 1670 IEEE80211_BASIC_RATE_MASK) 1671 network->flags &= 1672 ~NETWORK_HAS_CCK; 1673 } 1674 } 1675 1676 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", 1677 rates_str, network->rates_len); 1678 break; 1679 1680 case MFIE_TYPE_RATES_EX: 1681 #ifdef CONFIG_IEEE80211_DEBUG 1682 p = rates_str; 1683 #endif 1684 network->rates_ex_len = min(info_element->len, 1685 MAX_RATES_EX_LENGTH); 1686 for (i = 0; i < network->rates_ex_len; i++) { 1687 network->rates_ex[i] = info_element->data[i]; 1688 #ifdef CONFIG_IEEE80211_DEBUG 1689 p += snprintf(p, sizeof(rates_str) - 1690 (p - rates_str), "%02X ", 1691 network->rates_ex[i]); 1692 #endif 1693 if (ieee80211_is_ofdm_rate 1694 (info_element->data[i])) { 1695 network->flags |= NETWORK_HAS_OFDM; 1696 if (info_element->data[i] & 1697 IEEE80211_BASIC_RATE_MASK) 1698 network->flags &= 1699 ~NETWORK_HAS_CCK; 1700 } 1701 } 1702 1703 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1704 rates_str, network->rates_ex_len); 1705 break; 1706 1707 case MFIE_TYPE_DS_SET: 1708 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", 1709 info_element->data[0]); 1710 network->channel = info_element->data[0]; 1711 break; 1712 1713 case MFIE_TYPE_FH_SET: 1714 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); 1715 break; 1716 1717 case MFIE_TYPE_CF_SET: 1718 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); 1719 break; 1720 1721 case MFIE_TYPE_TIM: 1722 if(info_element->len < 4) 1723 break; 1724 1725 network->tim.tim_count = info_element->data[0]; 1726 network->tim.tim_period = info_element->data[1]; 1727 1728 network->dtim_period = info_element->data[1]; 1729 if(ieee->state != IEEE80211_LINKED) 1730 break; 1731 1732 network->last_dtim_sta_time[0] = stats->mac_time[0]; 1733 network->last_dtim_sta_time[1] = stats->mac_time[1]; 1734 1735 network->dtim_data = IEEE80211_DTIM_VALID; 1736 1737 if(info_element->data[0] != 0) 1738 break; 1739 1740 if(info_element->data[2] & 1) 1741 network->dtim_data |= IEEE80211_DTIM_MBCAST; 1742 1743 offset = (info_element->data[2] >> 1)*2; 1744 1745 if(ieee->assoc_id < 8*offset || 1746 ieee->assoc_id > 8*(offset + info_element->len -3)) 1747 1748 break; 1749 1750 offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ; 1751 1752 if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) 1753 network->dtim_data |= IEEE80211_DTIM_UCAST; 1754 1755 //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); 1756 break; 1757 1758 case MFIE_TYPE_ERP: 1759 network->erp_value = info_element->data[0]; 1760 network->flags |= NETWORK_HAS_ERP_VALUE; 1761 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", 1762 network->erp_value); 1763 break; 1764 case MFIE_TYPE_IBSS_SET: 1765 network->atim_window = info_element->data[0]; 1766 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", 1767 network->atim_window); 1768 break; 1769 1770 case MFIE_TYPE_CHALLENGE: 1771 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); 1772 break; 1773 1774 case MFIE_TYPE_GENERIC: 1775 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", 1776 info_element->len); 1777 if (!ieee80211_parse_qos_info_param_IE(info_element, 1778 network)) 1779 break; 1780 1781 if (info_element->len >= 4 && 1782 info_element->data[0] == 0x00 && 1783 info_element->data[1] == 0x50 && 1784 info_element->data[2] == 0xf2 && 1785 info_element->data[3] == 0x01) { 1786 network->wpa_ie_len = min(info_element->len + 2, 1787 MAX_WPA_IE_LEN); 1788 memcpy(network->wpa_ie, info_element, 1789 network->wpa_ie_len); 1790 break; 1791 } 1792 1793 #ifdef THOMAS_TURBO 1794 if (info_element->len == 7 && 1795 info_element->data[0] == 0x00 && 1796 info_element->data[1] == 0xe0 && 1797 info_element->data[2] == 0x4c && 1798 info_element->data[3] == 0x01 && 1799 info_element->data[4] == 0x02) { 1800 network->Turbo_Enable = 1; 1801 } 1802 #endif 1803 1804 //for HTcap and HTinfo parameters 1805 if(tmp_htcap_len == 0){ 1806 if(info_element->len >= 4 && 1807 info_element->data[0] == 0x00 && 1808 info_element->data[1] == 0x90 && 1809 info_element->data[2] == 0x4c && 1810 info_element->data[3] == 0x033){ 1811 1812 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN); 1813 if(tmp_htcap_len != 0){ 1814 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1815 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\ 1816 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len; 1817 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen); 1818 } 1819 } 1820 if(tmp_htcap_len != 0) 1821 network->bssht.bdSupportHT = true; 1822 else 1823 network->bssht.bdSupportHT = false; 1824 } 1825 1826 1827 if(tmp_htinfo_len == 0){ 1828 if(info_element->len >= 4 && 1829 info_element->data[0] == 0x00 && 1830 info_element->data[1] == 0x90 && 1831 info_element->data[2] == 0x4c && 1832 info_element->data[3] == 0x034){ 1833 1834 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN); 1835 if(tmp_htinfo_len != 0){ 1836 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1837 if(tmp_htinfo_len){ 1838 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\ 1839 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len; 1840 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen); 1841 } 1842 1843 } 1844 1845 } 1846 } 1847 1848 if(ieee->aggregation){ 1849 if(network->bssht.bdSupportHT){ 1850 if(info_element->len >= 4 && 1851 info_element->data[0] == 0x00 && 1852 info_element->data[1] == 0xe0 && 1853 info_element->data[2] == 0x4c && 1854 info_element->data[3] == 0x02){ 1855 1856 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN); 1857 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len); 1858 1859 } 1860 if(ht_realtek_agg_len >= 5){ 1861 network->bssht.bdRT2RTAggregation = true; 1862 1863 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02)) 1864 network->bssht.bdRT2RTLongSlotTime = true; 1865 } 1866 } 1867 1868 } 1869 1870 //if(tmp_htcap_len !=0 || tmp_htinfo_len != 0) 1871 { 1872 if ((info_element->len >= 3 && 1873 info_element->data[0] == 0x00 && 1874 info_element->data[1] == 0x05 && 1875 info_element->data[2] == 0xb5) || 1876 (info_element->len >= 3 && 1877 info_element->data[0] == 0x00 && 1878 info_element->data[1] == 0x0a && 1879 info_element->data[2] == 0xf7) || 1880 (info_element->len >= 3 && 1881 info_element->data[0] == 0x00 && 1882 info_element->data[1] == 0x10 && 1883 info_element->data[2] == 0x18)){ 1884 1885 network->broadcom_cap_exist = true; 1886 1887 } 1888 } 1889 if(info_element->len >= 3 && 1890 info_element->data[0] == 0x00 && 1891 info_element->data[1] == 0x0c && 1892 info_element->data[2] == 0x43) 1893 { 1894 network->ralink_cap_exist = true; 1895 } 1896 else 1897 network->ralink_cap_exist = false; 1898 //added by amy for atheros AP 1899 if((info_element->len >= 3 && 1900 info_element->data[0] == 0x00 && 1901 info_element->data[1] == 0x03 && 1902 info_element->data[2] == 0x7f) || 1903 (info_element->len >= 3 && 1904 info_element->data[0] == 0x00 && 1905 info_element->data[1] == 0x13 && 1906 info_element->data[2] == 0x74)) 1907 { 1908 printk("========>%s(): athros AP is exist\n",__func__); 1909 network->atheros_cap_exist = true; 1910 } 1911 else 1912 network->atheros_cap_exist = false; 1913 1914 if(info_element->len >= 3 && 1915 info_element->data[0] == 0x00 && 1916 info_element->data[1] == 0x40 && 1917 info_element->data[2] == 0x96) 1918 { 1919 network->cisco_cap_exist = true; 1920 } 1921 else 1922 network->cisco_cap_exist = false; 1923 //added by amy for LEAP of cisco 1924 if (info_element->len > 4 && 1925 info_element->data[0] == 0x00 && 1926 info_element->data[1] == 0x40 && 1927 info_element->data[2] == 0x96 && 1928 info_element->data[3] == 0x01) 1929 { 1930 if(info_element->len == 6) 1931 { 1932 memcpy(network->CcxRmState, &info_element[4], 2); 1933 if(network->CcxRmState[0] != 0) 1934 { 1935 network->bCcxRmEnable = true; 1936 } 1937 else 1938 network->bCcxRmEnable = false; 1939 // 1940 // CCXv4 Table 59-1 MBSSID Masks. 1941 // 1942 network->MBssidMask = network->CcxRmState[1] & 0x07; 1943 if(network->MBssidMask != 0) 1944 { 1945 network->bMBssidValid = true; 1946 network->MBssidMask = 0xff << (network->MBssidMask); 1947 ether_addr_copy(network->MBssid, network->bssid); 1948 network->MBssid[5] &= network->MBssidMask; 1949 } 1950 else 1951 { 1952 network->bMBssidValid = false; 1953 } 1954 } 1955 else 1956 { 1957 network->bCcxRmEnable = false; 1958 } 1959 } 1960 if (info_element->len > 4 && 1961 info_element->data[0] == 0x00 && 1962 info_element->data[1] == 0x40 && 1963 info_element->data[2] == 0x96 && 1964 info_element->data[3] == 0x03) 1965 { 1966 if(info_element->len == 5) 1967 { 1968 network->bWithCcxVerNum = true; 1969 network->BssCcxVerNumber = info_element->data[4]; 1970 } 1971 else 1972 { 1973 network->bWithCcxVerNum = false; 1974 network->BssCcxVerNumber = 0; 1975 } 1976 } 1977 break; 1978 1979 case MFIE_TYPE_RSN: 1980 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", 1981 info_element->len); 1982 network->rsn_ie_len = min(info_element->len + 2, 1983 MAX_WPA_IE_LEN); 1984 memcpy(network->rsn_ie, info_element, 1985 network->rsn_ie_len); 1986 break; 1987 1988 //HT related element. 1989 case MFIE_TYPE_HT_CAP: 1990 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n", 1991 info_element->len); 1992 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN); 1993 if(tmp_htcap_len != 0){ 1994 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; 1995 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\ 1996 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len; 1997 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen); 1998 1999 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT() 2000 // windows driver will update WMM parameters each beacon received once connected 2001 // Linux driver is a bit different. 2002 network->bssht.bdSupportHT = true; 2003 } 2004 else 2005 network->bssht.bdSupportHT = false; 2006 break; 2007 2008 2009 case MFIE_TYPE_HT_INFO: 2010 IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n", 2011 info_element->len); 2012 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN); 2013 if(tmp_htinfo_len){ 2014 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; 2015 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\ 2016 sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len; 2017 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen); 2018 } 2019 break; 2020 2021 case MFIE_TYPE_AIRONET: 2022 IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n", 2023 info_element->len); 2024 if(info_element->len >IE_CISCO_FLAG_POSITION) 2025 { 2026 network->bWithAironetIE = true; 2027 2028 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23): 2029 // "A Cisco access point advertises support for CKIP in beacon and probe response packets, 2030 // by adding an Aironet element and setting one or both of the CKIP negotiation bits." 2031 if( (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC) || 2032 (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK) ) 2033 { 2034 network->bCkipSupported = true; 2035 } 2036 else 2037 { 2038 network->bCkipSupported = false; 2039 } 2040 } 2041 else 2042 { 2043 network->bWithAironetIE = false; 2044 network->bCkipSupported = false; 2045 } 2046 break; 2047 case MFIE_TYPE_QOS_PARAMETER: 2048 printk(KERN_ERR 2049 "QoS Error need to parse QOS_PARAMETER IE\n"); 2050 break; 2051 2052 case MFIE_TYPE_COUNTRY: 2053 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", 2054 info_element->len); 2055 ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP 2056 break; 2057 /* TODO */ 2058 default: 2059 IEEE80211_DEBUG_MGMT 2060 ("Unsupported info element: %s (%d)\n", 2061 get_info_element_string(info_element->id), 2062 info_element->id); 2063 break; 2064 } 2065 2066 length -= sizeof(*info_element) + info_element->len; 2067 info_element = 2068 (struct ieee80211_info_element *)&info_element-> 2069 data[info_element->len]; 2070 } 2071 2072 if(!network->atheros_cap_exist && !network->broadcom_cap_exist && 2073 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) 2074 { 2075 network->unknown_cap_exist = true; 2076 } 2077 else 2078 { 2079 network->unknown_cap_exist = false; 2080 } 2081 return 0; 2082 } 2083 2084 static inline u8 ieee80211_SignalStrengthTranslate( 2085 u8 CurrSS 2086 ) 2087 { 2088 u8 RetSS; 2089 2090 // Step 1. Scale mapping. 2091 if(CurrSS >= 71 && CurrSS <= 100) 2092 { 2093 RetSS = 90 + ((CurrSS - 70) / 3); 2094 } 2095 else if(CurrSS >= 41 && CurrSS <= 70) 2096 { 2097 RetSS = 78 + ((CurrSS - 40) / 3); 2098 } 2099 else if(CurrSS >= 31 && CurrSS <= 40) 2100 { 2101 RetSS = 66 + (CurrSS - 30); 2102 } 2103 else if(CurrSS >= 21 && CurrSS <= 30) 2104 { 2105 RetSS = 54 + (CurrSS - 20); 2106 } 2107 else if(CurrSS >= 5 && CurrSS <= 20) 2108 { 2109 RetSS = 42 + (((CurrSS - 5) * 2) / 3); 2110 } 2111 else if(CurrSS == 4) 2112 { 2113 RetSS = 36; 2114 } 2115 else if(CurrSS == 3) 2116 { 2117 RetSS = 27; 2118 } 2119 else if(CurrSS == 2) 2120 { 2121 RetSS = 18; 2122 } 2123 else if(CurrSS == 1) 2124 { 2125 RetSS = 9; 2126 } 2127 else 2128 { 2129 RetSS = CurrSS; 2130 } 2131 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); 2132 2133 // Step 2. Smoothing. 2134 2135 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); 2136 2137 return RetSS; 2138 } 2139 2140 /* 0-100 index */ 2141 static long ieee80211_translate_todbm(u8 signal_strength_index) 2142 { 2143 long signal_power; // in dBm. 2144 2145 // Translate to dBm (x=0.5y-95). 2146 signal_power = (long)((signal_strength_index + 1) >> 1); 2147 signal_power -= 95; 2148 2149 return signal_power; 2150 } 2151 2152 static inline int ieee80211_network_init( 2153 struct ieee80211_device *ieee, 2154 struct ieee80211_probe_response *beacon, 2155 struct ieee80211_network *network, 2156 struct ieee80211_rx_stats *stats) 2157 { 2158 #ifdef CONFIG_IEEE80211_DEBUG 2159 //char rates_str[64]; 2160 //char *p; 2161 #endif 2162 2163 network->qos_data.active = 0; 2164 network->qos_data.supported = 0; 2165 network->qos_data.param_count = 0; 2166 network->qos_data.old_param_count = 0; 2167 2168 /* Pull out fixed field data */ 2169 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); 2170 network->capability = le16_to_cpu(beacon->capability); 2171 network->last_scanned = jiffies; 2172 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); 2173 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); 2174 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 2175 /* Where to pull this? beacon->listen_interval;*/ 2176 network->listen_interval = 0x0A; 2177 network->rates_len = network->rates_ex_len = 0; 2178 network->last_associate = 0; 2179 network->ssid_len = 0; 2180 network->flags = 0; 2181 network->atim_window = 0; 2182 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2183 0x3 : 0x0; 2184 network->berp_info_valid = false; 2185 network->broadcom_cap_exist = false; 2186 network->ralink_cap_exist = false; 2187 network->atheros_cap_exist = false; 2188 network->cisco_cap_exist = false; 2189 network->unknown_cap_exist = false; 2190 #ifdef THOMAS_TURBO 2191 network->Turbo_Enable = 0; 2192 #endif 2193 network->CountryIeLen = 0; 2194 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2195 //Initialize HT parameters 2196 //ieee80211_ht_initialize(&network->bssht); 2197 HTInitializeBssDesc(&network->bssht); 2198 if (stats->freq == IEEE80211_52GHZ_BAND) { 2199 /* for A band (No DS info) */ 2200 network->channel = stats->received_channel; 2201 } else 2202 network->flags |= NETWORK_HAS_CCK; 2203 2204 network->wpa_ie_len = 0; 2205 network->rsn_ie_len = 0; 2206 2207 if (ieee80211_parse_info_param 2208 (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats)) 2209 return 1; 2210 2211 network->mode = 0; 2212 if (stats->freq == IEEE80211_52GHZ_BAND) 2213 network->mode = IEEE_A; 2214 else { 2215 if (network->flags & NETWORK_HAS_OFDM) 2216 network->mode |= IEEE_G; 2217 if (network->flags & NETWORK_HAS_CCK) 2218 network->mode |= IEEE_B; 2219 } 2220 2221 if (network->mode == 0) { 2222 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' " 2223 "network.\n", 2224 escape_essid(network->ssid, 2225 network->ssid_len), 2226 network->bssid); 2227 return 1; 2228 } 2229 2230 if(network->bssht.bdSupportHT){ 2231 if(network->mode == IEEE_A) 2232 network->mode = IEEE_N_5G; 2233 else if(network->mode & (IEEE_G | IEEE_B)) 2234 network->mode = IEEE_N_24G; 2235 } 2236 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) 2237 network->flags |= NETWORK_EMPTY_ESSID; 2238 2239 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2240 //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal); 2241 stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25; 2242 2243 memcpy(&network->stats, stats, sizeof(network->stats)); 2244 2245 return 0; 2246 } 2247 2248 static inline int is_same_network(struct ieee80211_network *src, 2249 struct ieee80211_network *dst, struct ieee80211_device *ieee) 2250 { 2251 /* A network is only a duplicate if the channel, BSSID, ESSID 2252 * and the capability field (in particular IBSS and BSS) all match. 2253 * We treat all <hidden> with the same BSSID and channel 2254 * as one network */ 2255 return //((src->ssid_len == dst->ssid_len) && 2256 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2257 (src->channel == dst->channel) && 2258 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2259 //!memcmp(src->ssid, dst->ssid, src->ssid_len) && 2260 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && 2261 ((src->capability & WLAN_CAPABILITY_IBSS) == 2262 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2263 ((src->capability & WLAN_CAPABILITY_BSS) == 2264 (dst->capability & WLAN_CAPABILITY_BSS))); 2265 } 2266 2267 static inline void update_network(struct ieee80211_network *dst, 2268 struct ieee80211_network *src) 2269 { 2270 int qos_active; 2271 u8 old_param; 2272 2273 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); 2274 dst->capability = src->capability; 2275 memcpy(dst->rates, src->rates, src->rates_len); 2276 dst->rates_len = src->rates_len; 2277 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2278 dst->rates_ex_len = src->rates_ex_len; 2279 if (src->ssid_len > 0) 2280 { 2281 memset(dst->ssid, 0, dst->ssid_len); 2282 dst->ssid_len = src->ssid_len; 2283 memcpy(dst->ssid, src->ssid, src->ssid_len); 2284 } 2285 dst->mode = src->mode; 2286 dst->flags = src->flags; 2287 dst->time_stamp[0] = src->time_stamp[0]; 2288 dst->time_stamp[1] = src->time_stamp[1]; 2289 if (src->flags & NETWORK_HAS_ERP_VALUE) 2290 { 2291 dst->erp_value = src->erp_value; 2292 dst->berp_info_valid = src->berp_info_valid = true; 2293 } 2294 dst->beacon_interval = src->beacon_interval; 2295 dst->listen_interval = src->listen_interval; 2296 dst->atim_window = src->atim_window; 2297 dst->dtim_period = src->dtim_period; 2298 dst->dtim_data = src->dtim_data; 2299 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; 2300 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; 2301 memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters)); 2302 2303 dst->bssht.bdSupportHT = src->bssht.bdSupportHT; 2304 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; 2305 dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen; 2306 memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen); 2307 dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen; 2308 memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen); 2309 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; 2310 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; 2311 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2312 dst->ralink_cap_exist = src->ralink_cap_exist; 2313 dst->atheros_cap_exist = src->atheros_cap_exist; 2314 dst->cisco_cap_exist = src->cisco_cap_exist; 2315 dst->unknown_cap_exist = src->unknown_cap_exist; 2316 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2317 dst->wpa_ie_len = src->wpa_ie_len; 2318 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2319 dst->rsn_ie_len = src->rsn_ie_len; 2320 2321 dst->last_scanned = jiffies; 2322 /* qos related parameters */ 2323 //qos_active = src->qos_data.active; 2324 qos_active = dst->qos_data.active; 2325 //old_param = dst->qos_data.old_param_count; 2326 old_param = dst->qos_data.param_count; 2327 if(dst->flags & NETWORK_HAS_QOS_MASK) 2328 memcpy(&dst->qos_data, &src->qos_data, 2329 sizeof(struct ieee80211_qos_data)); 2330 else { 2331 dst->qos_data.supported = src->qos_data.supported; 2332 dst->qos_data.param_count = src->qos_data.param_count; 2333 } 2334 2335 if (dst->qos_data.supported == 1) { 2336 dst->QoS_Enable = 1; 2337 if(dst->ssid_len) 2338 IEEE80211_DEBUG_QOS 2339 ("QoS the network %s is QoS supported\n", 2340 dst->ssid); 2341 else 2342 IEEE80211_DEBUG_QOS 2343 ("QoS the network is QoS supported\n"); 2344 } 2345 dst->qos_data.active = qos_active; 2346 dst->qos_data.old_param_count = old_param; 2347 2348 /* dst->last_associate is not overwritten */ 2349 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. 2350 if (src->wmm_param[0].aci_aifsn|| \ 2351 src->wmm_param[1].aci_aifsn|| \ 2352 src->wmm_param[2].aci_aifsn|| \ 2353 src->wmm_param[3].aci_aifsn) { 2354 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2355 } 2356 //dst->QoS_Enable = src->QoS_Enable; 2357 #ifdef THOMAS_TURBO 2358 dst->Turbo_Enable = src->Turbo_Enable; 2359 #endif 2360 2361 dst->CountryIeLen = src->CountryIeLen; 2362 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2363 2364 //added by amy for LEAP 2365 dst->bWithAironetIE = src->bWithAironetIE; 2366 dst->bCkipSupported = src->bCkipSupported; 2367 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2368 dst->bCcxRmEnable = src->bCcxRmEnable; 2369 dst->MBssidMask = src->MBssidMask; 2370 dst->bMBssidValid = src->bMBssidValid; 2371 memcpy(dst->MBssid, src->MBssid, 6); 2372 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2373 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2374 2375 } 2376 2377 static inline int is_beacon(__le16 fc) 2378 { 2379 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); 2380 } 2381 2382 static inline void ieee80211_process_probe_response( 2383 struct ieee80211_device *ieee, 2384 struct ieee80211_probe_response *beacon, 2385 struct ieee80211_rx_stats *stats) 2386 { 2387 struct ieee80211_network *network; 2388 struct ieee80211_network *target; 2389 struct ieee80211_network *oldest = NULL; 2390 #ifdef CONFIG_IEEE80211_DEBUG 2391 struct ieee80211_info_element *info_element = &beacon->info_element[0]; 2392 #endif 2393 int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)); 2394 unsigned long flags; 2395 short renew; 2396 u16 capability; 2397 //u8 wmm_info; 2398 2399 network = kzalloc(sizeof(*network), GFP_ATOMIC); 2400 if (!network) 2401 goto out; 2402 2403 capability = le16_to_cpu(beacon->capability); 2404 IEEE80211_DEBUG_SCAN( 2405 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2406 escape_essid(info_element->data, info_element->len), 2407 beacon->header.addr3, 2408 (capability & (1 << 0xf)) ? '1' : '0', 2409 (capability & (1 << 0xe)) ? '1' : '0', 2410 (capability & (1 << 0xd)) ? '1' : '0', 2411 (capability & (1 << 0xc)) ? '1' : '0', 2412 (capability & (1 << 0xb)) ? '1' : '0', 2413 (capability & (1 << 0xa)) ? '1' : '0', 2414 (capability & (1 << 0x9)) ? '1' : '0', 2415 (capability & (1 << 0x8)) ? '1' : '0', 2416 (capability & (1 << 0x7)) ? '1' : '0', 2417 (capability & (1 << 0x6)) ? '1' : '0', 2418 (capability & (1 << 0x5)) ? '1' : '0', 2419 (capability & (1 << 0x4)) ? '1' : '0', 2420 (capability & (1 << 0x3)) ? '1' : '0', 2421 (capability & (1 << 0x2)) ? '1' : '0', 2422 (capability & (1 << 0x1)) ? '1' : '0', 2423 (capability & (1 << 0x0)) ? '1' : '0'); 2424 2425 if (ieee80211_network_init(ieee, beacon, network, stats)) { 2426 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n", 2427 escape_essid(info_element->data, 2428 info_element->len), 2429 beacon->header.addr3, 2430 fc == IEEE80211_STYPE_PROBE_RESP ? 2431 "PROBE RESPONSE" : "BEACON"); 2432 goto out; 2433 } 2434 2435 // For Asus EeePc request, 2436 // (1) if wireless adapter receive get any 802.11d country code in AP beacon, 2437 // wireless adapter should follow the country code. 2438 // (2) If there is no any country code in beacon, 2439 // then wireless adapter should do active scan from ch1~11 and 2440 // passive scan from ch12~14 2441 2442 if (!is_legal_channel(ieee, network->channel)) 2443 goto out; 2444 if (ieee->bGlobalDomain) 2445 { 2446 if (fc == IEEE80211_STYPE_PROBE_RESP) 2447 { 2448 // Case 1: Country code 2449 if(IS_COUNTRY_IE_VALID(ieee) ) 2450 { 2451 if (!is_legal_channel(ieee, network->channel)) { 2452 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel); 2453 goto out; 2454 } 2455 } 2456 // Case 2: No any country code. 2457 else 2458 { 2459 // Filter over channel ch12~14 2460 if (network->channel > 11) 2461 { 2462 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel); 2463 goto out; 2464 } 2465 } 2466 } 2467 else 2468 { 2469 // Case 1: Country code 2470 if(IS_COUNTRY_IE_VALID(ieee) ) 2471 { 2472 if (!is_legal_channel(ieee, network->channel)) { 2473 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network->channel); 2474 goto out; 2475 } 2476 } 2477 // Case 2: No any country code. 2478 else 2479 { 2480 // Filter over channel ch12~14 2481 if (network->channel > 14) 2482 { 2483 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network->channel); 2484 goto out; 2485 } 2486 } 2487 } 2488 } 2489 2490 /* The network parsed correctly -- so now we scan our known networks 2491 * to see if we can find it in our list. 2492 * 2493 * NOTE: This search is definitely not optimized. Once its doing 2494 * the "right thing" we'll optimize it for efficiency if 2495 * necessary */ 2496 2497 /* Search for this entry in the list and update it if it is 2498 * already there. */ 2499 2500 spin_lock_irqsave(&ieee->lock, flags); 2501 2502 if (is_same_network(&ieee->current_network, network, ieee)) { 2503 update_network(&ieee->current_network, network); 2504 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G) 2505 && ieee->current_network.berp_info_valid){ 2506 if(ieee->current_network.erp_value& ERP_UseProtection) 2507 ieee->current_network.buseprotection = true; 2508 else 2509 ieee->current_network.buseprotection = false; 2510 } 2511 if(is_beacon(beacon->header.frame_ctl)) 2512 { 2513 if(ieee->state == IEEE80211_LINKED) 2514 ieee->LinkDetectInfo.NumRecvBcnInPeriod++; 2515 } 2516 else //hidden AP 2517 network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags); 2518 } 2519 2520 list_for_each_entry(target, &ieee->network_list, list) { 2521 if (is_same_network(target, network, ieee)) 2522 break; 2523 if ((oldest == NULL) || 2524 (target->last_scanned < oldest->last_scanned)) 2525 oldest = target; 2526 } 2527 2528 /* If we didn't find a match, then get a new network slot to initialize 2529 * with this beacon's information */ 2530 if (&target->list == &ieee->network_list) { 2531 if (list_empty(&ieee->network_free_list)) { 2532 /* If there are no more slots, expire the oldest */ 2533 list_del(&oldest->list); 2534 target = oldest; 2535 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from " 2536 "network list.\n", 2537 escape_essid(target->ssid, 2538 target->ssid_len), 2539 target->bssid); 2540 } else { 2541 /* Otherwise just pull from the free list */ 2542 target = list_entry(ieee->network_free_list.next, 2543 struct ieee80211_network, list); 2544 list_del(ieee->network_free_list.next); 2545 } 2546 2547 2548 #ifdef CONFIG_IEEE80211_DEBUG 2549 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n", 2550 escape_essid(network->ssid, 2551 network->ssid_len), 2552 network->bssid, 2553 fc == IEEE80211_STYPE_PROBE_RESP ? 2554 "PROBE RESPONSE" : "BEACON"); 2555 #endif 2556 memcpy(target, network, sizeof(*target)); 2557 list_add_tail(&target->list, &ieee->network_list); 2558 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2559 ieee80211_softmac_new_net(ieee,network); 2560 } else { 2561 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n", 2562 escape_essid(target->ssid, 2563 target->ssid_len), 2564 target->bssid, 2565 fc == IEEE80211_STYPE_PROBE_RESP ? 2566 "PROBE RESPONSE" : "BEACON"); 2567 2568 /* we have an entry and we are going to update it. But this entry may 2569 * be already expired. In this case we do the same as we found a new 2570 * net and call the new_net handler 2571 */ 2572 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); 2573 //YJ,add,080819,for hidden ap 2574 if(is_beacon(beacon->header.frame_ctl) == 0) 2575 network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & target->flags); 2576 //if(strncmp(network->ssid, "linksys-c",9) == 0) 2577 // printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags); 2578 if(((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ 2579 && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\ 2580 ||((ieee->current_network.ssid_len == network->ssid_len)&&(strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK)))) 2581 renew = 1; 2582 //YJ,add,080819,for hidden ap,end 2583 2584 update_network(target, network); 2585 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2586 ieee80211_softmac_new_net(ieee,network); 2587 } 2588 2589 spin_unlock_irqrestore(&ieee->lock, flags); 2590 if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, ieee)&&\ 2591 (ieee->state == IEEE80211_LINKED)) { 2592 if (ieee->handle_beacon != NULL) { 2593 ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network); 2594 } 2595 } 2596 2597 out: 2598 kfree(network); 2599 } 2600 2601 void ieee80211_rx_mgt(struct ieee80211_device *ieee, 2602 struct rtl_80211_hdr_4addr *header, 2603 struct ieee80211_rx_stats *stats) 2604 { 2605 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { 2606 2607 case IEEE80211_STYPE_BEACON: 2608 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", 2609 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2610 IEEE80211_DEBUG_SCAN("Beacon\n"); 2611 ieee80211_process_probe_response( 2612 ieee, (struct ieee80211_probe_response *)header, stats); 2613 break; 2614 2615 case IEEE80211_STYPE_PROBE_RESP: 2616 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", 2617 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))); 2618 IEEE80211_DEBUG_SCAN("Probe response\n"); 2619 ieee80211_process_probe_response( 2620 ieee, (struct ieee80211_probe_response *)header, stats); 2621 break; 2622 2623 } 2624 } 2625 EXPORT_SYMBOL(ieee80211_rx_mgt); 2626