Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 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 <andreamrl@tiscali.it> |
| 18 | |
| 19 | A special thanks goes to Realtek for their support ! |
| 20 | |
| 21 | ******************************************************************************/ |
| 22 | |
| 23 | |
| 24 | #include <linux/compiler.h> |
| 25 | //#include <linux/config.h> |
| 26 | #include <linux/errno.h> |
| 27 | #include <linux/if_arp.h> |
| 28 | #include <linux/in6.h> |
| 29 | #include <linux/in.h> |
| 30 | #include <linux/ip.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/netdevice.h> |
| 34 | #include <linux/pci.h> |
| 35 | #include <linux/proc_fs.h> |
| 36 | #include <linux/skbuff.h> |
| 37 | #include <linux/slab.h> |
| 38 | #include <linux/tcp.h> |
| 39 | #include <linux/types.h> |
| 40 | #include <linux/version.h> |
| 41 | #include <linux/wireless.h> |
| 42 | #include <linux/etherdevice.h> |
| 43 | #include <asm/uaccess.h> |
| 44 | #include <linux/ctype.h> |
| 45 | |
| 46 | #include "ieee80211.h" |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 47 | #include "dot11d.h" |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 48 | static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, |
| 49 | struct sk_buff *skb, |
| 50 | struct ieee80211_rx_stats *rx_stats) |
| 51 | { |
| 52 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 53 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 54 | |
| 55 | skb->dev = ieee->dev; |
Bartlomiej Zolnierkiewicz | 0370453 | 2009-06-13 18:30:28 +0200 | [diff] [blame] | 56 | skb_reset_mac_header(skb); |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 57 | skb_pull(skb, ieee80211_get_hdrlen(fc)); |
| 58 | skb->pkt_type = PACKET_OTHERHOST; |
| 59 | skb->protocol = __constant_htons(ETH_P_80211_RAW); |
| 60 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 61 | netif_rx(skb); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | /* Called only as a tasklet (software IRQ) */ |
| 66 | static struct ieee80211_frag_entry * |
| 67 | ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq, |
| 68 | unsigned int frag, u8 tid,u8 *src, u8 *dst) |
| 69 | { |
| 70 | struct ieee80211_frag_entry *entry; |
| 71 | int i; |
| 72 | |
| 73 | for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { |
| 74 | entry = &ieee->frag_cache[tid][i]; |
| 75 | if (entry->skb != NULL && |
| 76 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
| 77 | IEEE80211_DEBUG_FRAG( |
| 78 | "expiring fragment cache entry " |
| 79 | "seq=%u last_frag=%u\n", |
| 80 | entry->seq, entry->last_frag); |
| 81 | dev_kfree_skb_any(entry->skb); |
| 82 | entry->skb = NULL; |
| 83 | } |
| 84 | |
| 85 | if (entry->skb != NULL && entry->seq == seq && |
| 86 | (entry->last_frag + 1 == frag || frag == -1) && |
| 87 | memcmp(entry->src_addr, src, ETH_ALEN) == 0 && |
| 88 | memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) |
| 89 | return entry; |
| 90 | } |
| 91 | |
| 92 | return NULL; |
| 93 | } |
| 94 | |
| 95 | /* Called only as a tasklet (software IRQ) */ |
| 96 | static struct sk_buff * |
| 97 | ieee80211_frag_cache_get(struct ieee80211_device *ieee, |
| 98 | struct ieee80211_hdr *hdr) |
| 99 | { |
| 100 | struct sk_buff *skb = NULL; |
| 101 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 102 | u16 sc = le16_to_cpu(hdr->seq_ctl); |
| 103 | unsigned int frag = WLAN_GET_SEQ_FRAG(sc); |
| 104 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); |
| 105 | struct ieee80211_frag_entry *entry; |
| 106 | struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS; |
| 107 | struct ieee80211_hdr_QOS *hdr_4addr_QoS; |
| 108 | u8 tid; |
| 109 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 110 | if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { |
| 111 | hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr; |
| 112 | tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 113 | tid = UP2AC(tid); |
| 114 | tid ++; |
| 115 | } else if (IEEE80211_QOS_HAS_SEQ(fc)) { |
| 116 | hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr; |
| 117 | tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 118 | tid = UP2AC(tid); |
| 119 | tid ++; |
| 120 | } else { |
| 121 | tid = 0; |
| 122 | } |
| 123 | |
| 124 | if (frag == 0) { |
| 125 | /* Reserve enough space to fit maximum frame length */ |
| 126 | skb = dev_alloc_skb(ieee->dev->mtu + |
| 127 | sizeof(struct ieee80211_hdr) + |
| 128 | 8 /* LLC */ + |
| 129 | 2 /* alignment */ + |
| 130 | 8 /* WEP */ + |
| 131 | ETH_ALEN /* WDS */ + |
| 132 | (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */); |
| 133 | if (skb == NULL) |
| 134 | return NULL; |
| 135 | |
| 136 | entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; |
| 137 | ieee->frag_next_idx[tid]++; |
| 138 | if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN) |
| 139 | ieee->frag_next_idx[tid] = 0; |
| 140 | |
| 141 | if (entry->skb != NULL) |
| 142 | dev_kfree_skb_any(entry->skb); |
| 143 | |
| 144 | entry->first_frag_time = jiffies; |
| 145 | entry->seq = seq; |
| 146 | entry->last_frag = frag; |
| 147 | entry->skb = skb; |
| 148 | memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); |
| 149 | memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); |
| 150 | } else { |
| 151 | /* received a fragment of a frame for which the head fragment |
| 152 | * should have already been received */ |
| 153 | entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2, |
| 154 | hdr->addr1); |
| 155 | if (entry != NULL) { |
| 156 | entry->last_frag = frag; |
| 157 | skb = entry->skb; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | return skb; |
| 162 | } |
| 163 | |
| 164 | |
| 165 | /* Called only as a tasklet (software IRQ) */ |
| 166 | static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, |
| 167 | struct ieee80211_hdr *hdr) |
| 168 | { |
| 169 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 170 | u16 sc = le16_to_cpu(hdr->seq_ctl); |
| 171 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); |
| 172 | struct ieee80211_frag_entry *entry; |
| 173 | struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS; |
| 174 | struct ieee80211_hdr_QOS *hdr_4addr_QoS; |
| 175 | u8 tid; |
| 176 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 177 | if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { |
| 178 | hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr; |
| 179 | tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 180 | tid = UP2AC(tid); |
| 181 | tid ++; |
| 182 | } else if (IEEE80211_QOS_HAS_SEQ(fc)) { |
| 183 | hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr; |
| 184 | tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 185 | tid = UP2AC(tid); |
| 186 | tid ++; |
| 187 | } else { |
| 188 | tid = 0; |
| 189 | } |
| 190 | |
| 191 | entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2, |
| 192 | hdr->addr1); |
| 193 | |
| 194 | if (entry == NULL) { |
| 195 | IEEE80211_DEBUG_FRAG( |
| 196 | "could not invalidate fragment cache " |
| 197 | "entry (seq=%u)\n", seq); |
| 198 | return -1; |
| 199 | } |
| 200 | |
| 201 | entry->skb = NULL; |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | |
| 206 | |
| 207 | /* ieee80211_rx_frame_mgtmt |
| 208 | * |
| 209 | * Responsible for handling management control frames |
| 210 | * |
| 211 | * Called by ieee80211_rx */ |
| 212 | static inline int |
| 213 | ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 214 | struct ieee80211_rx_stats *rx_stats, u16 type, |
| 215 | u16 stype) |
| 216 | { |
| 217 | struct ieee80211_hdr *hdr; |
| 218 | |
| 219 | // cheat the the hdr type |
| 220 | hdr = (struct ieee80211_hdr *)skb->data; |
| 221 | |
| 222 | /* On the struct stats definition there is written that |
| 223 | * this is not mandatory.... but seems that the probe |
| 224 | * response parser uses it |
| 225 | */ |
| 226 | rx_stats->len = skb->len; |
| 227 | ieee80211_rx_mgt(ieee,(struct ieee80211_hdr *)skb->data,rx_stats); |
| 228 | |
| 229 | if((ieee->state == IEEE80211_LINKED)&&(memcmp(hdr->addr3,ieee->current_network.bssid,ETH_ALEN))) { |
| 230 | dev_kfree_skb_any(skb); |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype); |
| 235 | |
| 236 | dev_kfree_skb_any(skb); |
| 237 | |
| 238 | return 0; |
| 239 | |
| 240 | #ifdef NOT_YET |
| 241 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 242 | printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", |
| 243 | ieee->dev->name); |
| 244 | return 0; |
| 245 | /* |
| 246 | hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *) |
| 247 | skb->data);*/ |
| 248 | } |
| 249 | |
| 250 | if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) { |
| 251 | if (stype == WLAN_FC_STYPE_BEACON && |
| 252 | ieee->iw_mode == IW_MODE_MASTER) { |
| 253 | struct sk_buff *skb2; |
| 254 | /* Process beacon frames also in kernel driver to |
| 255 | * update STA(AP) table statistics */ |
| 256 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 257 | if (skb2) |
| 258 | hostap_rx(skb2->dev, skb2, rx_stats); |
| 259 | } |
| 260 | |
| 261 | /* send management frames to the user space daemon for |
| 262 | * processing */ |
| 263 | ieee->apdevstats.rx_packets++; |
| 264 | ieee->apdevstats.rx_bytes += skb->len; |
| 265 | prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 270 | if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { |
| 271 | printk(KERN_DEBUG "%s: unknown management frame " |
| 272 | "(type=0x%02x, stype=0x%02x) dropped\n", |
| 273 | skb->dev->name, type, stype); |
| 274 | return -1; |
| 275 | } |
| 276 | |
| 277 | hostap_rx(skb->dev, skb, rx_stats); |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " |
| 282 | "received in non-Host AP mode\n", skb->dev->name); |
| 283 | return -1; |
| 284 | #endif |
| 285 | } |
| 286 | |
| 287 | |
| 288 | |
| 289 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| 290 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| 291 | static unsigned char rfc1042_header[] = |
| 292 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| 293 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| 294 | static unsigned char bridge_tunnel_header[] = |
| 295 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
| 296 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
| 297 | |
| 298 | /* Called by ieee80211_rx_frame_decrypt */ |
| 299 | static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, |
| 300 | struct sk_buff *skb, size_t hdrlen) |
| 301 | { |
| 302 | struct net_device *dev = ieee->dev; |
| 303 | u16 fc, ethertype; |
| 304 | struct ieee80211_hdr *hdr; |
| 305 | u8 *pos; |
| 306 | |
| 307 | if (skb->len < 24) |
| 308 | return 0; |
| 309 | |
| 310 | hdr = (struct ieee80211_hdr *) skb->data; |
| 311 | fc = le16_to_cpu(hdr->frame_ctl); |
| 312 | |
| 313 | /* check that the frame is unicast frame to us */ |
| 314 | if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 315 | IEEE80211_FCTL_TODS && |
| 316 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && |
| 317 | memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { |
| 318 | /* ToDS frame with own addr BSSID and DA */ |
| 319 | } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 320 | IEEE80211_FCTL_FROMDS && |
| 321 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { |
| 322 | /* FromDS frame with own addr as DA */ |
| 323 | } else |
| 324 | return 0; |
| 325 | |
| 326 | if (skb->len < 24 + 8) |
| 327 | return 0; |
| 328 | |
| 329 | /* check for port access entity Ethernet type */ |
| 330 | // pos = skb->data + 24; |
| 331 | pos = skb->data + hdrlen; |
| 332 | ethertype = (pos[6] << 8) | pos[7]; |
| 333 | if (ethertype == ETH_P_PAE) |
| 334 | return 1; |
| 335 | |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
| 340 | static inline int |
| 341 | ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb, |
| 342 | struct ieee80211_crypt_data *crypt) |
| 343 | { |
| 344 | struct ieee80211_hdr *hdr; |
| 345 | int res, hdrlen; |
| 346 | |
| 347 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) |
| 348 | return 0; |
| 349 | |
| 350 | hdr = (struct ieee80211_hdr *) skb->data; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 351 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 352 | |
| 353 | #ifdef CONFIG_IEEE80211_CRYPT_TKIP |
| 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 " MAC_FMT "\n", |
| 359 | ieee->dev->name, MAC_ARG(hdr->addr2)); |
| 360 | } |
| 361 | return -1; |
| 362 | } |
| 363 | #endif |
| 364 | |
| 365 | atomic_inc(&crypt->refcnt); |
| 366 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); |
| 367 | atomic_dec(&crypt->refcnt); |
| 368 | if (res < 0) { |
| 369 | IEEE80211_DEBUG_DROP( |
| 370 | "decryption failed (SA=" MAC_FMT |
| 371 | ") res=%d\n", MAC_ARG(hdr->addr2), res); |
| 372 | if (res == -2) |
| 373 | IEEE80211_DEBUG_DROP("Decryption failed ICV " |
| 374 | "mismatch (key %d)\n", |
| 375 | skb->data[hdrlen + 3] >> 6); |
| 376 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | return res; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
| 385 | static inline int |
| 386 | ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb, |
| 387 | int keyidx, struct ieee80211_crypt_data *crypt) |
| 388 | { |
| 389 | struct ieee80211_hdr *hdr; |
| 390 | int res, hdrlen; |
| 391 | |
| 392 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) |
| 393 | return 0; |
| 394 | |
| 395 | hdr = (struct ieee80211_hdr *) skb->data; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 396 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 397 | |
| 398 | atomic_inc(&crypt->refcnt); |
| 399 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); |
| 400 | atomic_dec(&crypt->refcnt); |
| 401 | if (res < 0) { |
| 402 | printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" |
| 403 | " (SA=" MAC_FMT " keyidx=%d)\n", |
| 404 | ieee->dev->name, MAC_ARG(hdr->addr2), keyidx); |
| 405 | return -1; |
| 406 | } |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | |
| 412 | /* this function is stolen from ipw2200 driver*/ |
| 413 | #define IEEE_PACKET_RETRY_TIME (5*HZ) |
| 414 | static int is_duplicate_packet(struct ieee80211_device *ieee, |
| 415 | struct ieee80211_hdr *header) |
| 416 | { |
| 417 | u16 fc = le16_to_cpu(header->frame_ctl); |
| 418 | u16 sc = le16_to_cpu(header->seq_ctl); |
| 419 | u16 seq = WLAN_GET_SEQ_SEQ(sc); |
| 420 | u16 frag = WLAN_GET_SEQ_FRAG(sc); |
| 421 | u16 *last_seq, *last_frag; |
| 422 | unsigned long *last_time; |
| 423 | struct ieee80211_hdr_3addr_QOS *hdr_3addr_QoS; |
| 424 | struct ieee80211_hdr_QOS *hdr_4addr_QoS; |
| 425 | u8 tid; |
| 426 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 427 | //TO2DS and QoS |
| 428 | if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { |
| 429 | hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)header; |
| 430 | tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 431 | tid = UP2AC(tid); |
| 432 | tid ++; |
| 433 | } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS |
| 434 | hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS*)header; |
| 435 | tid = le16_to_cpu(hdr_3addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; |
| 436 | tid = UP2AC(tid); |
| 437 | tid ++; |
| 438 | } else { // no QoS |
| 439 | tid = 0; |
| 440 | } |
| 441 | switch (ieee->iw_mode) { |
| 442 | case IW_MODE_ADHOC: |
| 443 | { |
| 444 | struct list_head *p; |
| 445 | struct ieee_ibss_seq *entry = NULL; |
| 446 | u8 *mac = header->addr2; |
| 447 | int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; |
| 448 | //for (pos = (head)->next; pos != (head); pos = pos->next) |
| 449 | __list_for_each(p, &ieee->ibss_mac_hash[index]) { |
| 450 | entry = list_entry(p, struct ieee_ibss_seq, list); |
| 451 | if (!memcmp(entry->mac, mac, ETH_ALEN)) |
| 452 | break; |
| 453 | } |
| 454 | // if (memcmp(entry->mac, mac, ETH_ALEN)){ |
| 455 | if (p == &ieee->ibss_mac_hash[index]) { |
| 456 | entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC); |
| 457 | if (!entry) { |
| 458 | printk(KERN_WARNING "Cannot malloc new mac entry\n"); |
| 459 | return 0; |
| 460 | } |
| 461 | memcpy(entry->mac, mac, ETH_ALEN); |
| 462 | entry->seq_num[tid] = seq; |
| 463 | entry->frag_num[tid] = frag; |
| 464 | entry->packet_time[tid] = jiffies; |
| 465 | list_add(&entry->list, &ieee->ibss_mac_hash[index]); |
| 466 | return 0; |
| 467 | } |
| 468 | last_seq = &entry->seq_num[tid]; |
| 469 | last_frag = &entry->frag_num[tid]; |
| 470 | last_time = &entry->packet_time[tid]; |
| 471 | break; |
| 472 | } |
| 473 | |
| 474 | case IW_MODE_INFRA: |
| 475 | last_seq = &ieee->last_rxseq_num[tid]; |
| 476 | last_frag = &ieee->last_rxfrag_num[tid]; |
| 477 | last_time = &ieee->last_packet_time[tid]; |
| 478 | |
| 479 | break; |
| 480 | default: |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | // if(tid != 0) { |
| 485 | // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl); |
| 486 | // } |
| 487 | if ((*last_seq == seq) && |
| 488 | time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { |
| 489 | if (*last_frag == frag){ |
| 490 | //printk(KERN_WARNING "[1] go drop!\n"); |
| 491 | goto drop; |
| 492 | |
| 493 | } |
| 494 | if (*last_frag + 1 != frag) |
| 495 | /* out-of-order fragment */ |
| 496 | //printk(KERN_WARNING "[2] go drop!\n"); |
| 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 | // printk("DUP\n"); |
| 508 | |
| 509 | return 1; |
| 510 | } |
| 511 | |
| 512 | |
| 513 | /* All received frames are sent to this function. @skb contains the frame in |
| 514 | * IEEE 802.11 format, i.e., in the format it was sent over air. |
| 515 | * This function is called only as a tasklet (software IRQ). */ |
| 516 | int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 517 | struct ieee80211_rx_stats *rx_stats) |
| 518 | { |
| 519 | struct net_device *dev = ieee->dev; |
| 520 | //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev); |
| 521 | struct ieee80211_hdr *hdr; |
| 522 | //struct ieee80211_hdr_3addr_QOS *hdr; |
| 523 | |
| 524 | size_t hdrlen; |
| 525 | u16 fc, type, stype, sc; |
| 526 | struct net_device_stats *stats; |
| 527 | unsigned int frag; |
| 528 | u8 *payload; |
| 529 | u16 ethertype; |
| 530 | #ifdef NOT_YET |
| 531 | struct net_device *wds = NULL; |
| 532 | struct sk_buff *skb2 = NULL; |
| 533 | struct net_device *wds = NULL; |
| 534 | int frame_authorized = 0; |
| 535 | int from_assoc_ap = 0; |
| 536 | void *sta = NULL; |
| 537 | #endif |
| 538 | // u16 QOS_ctl = 0; |
| 539 | u8 dst[ETH_ALEN]; |
| 540 | u8 src[ETH_ALEN]; |
| 541 | u8 bssid[ETH_ALEN]; |
| 542 | struct ieee80211_crypt_data *crypt = NULL; |
| 543 | int keyidx = 0; |
| 544 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 545 | // cheat the the hdr type |
| 546 | hdr = (struct ieee80211_hdr *)skb->data; |
| 547 | stats = &ieee->stats; |
| 548 | |
| 549 | if (skb->len < 10) { |
| 550 | printk(KERN_INFO "%s: SKB length < 10\n", |
| 551 | dev->name); |
| 552 | goto rx_dropped; |
| 553 | } |
| 554 | |
| 555 | fc = le16_to_cpu(hdr->frame_ctl); |
| 556 | type = WLAN_FC_GET_TYPE(fc); |
| 557 | stype = WLAN_FC_GET_STYPE(fc); |
| 558 | sc = le16_to_cpu(hdr->seq_ctl); |
| 559 | |
| 560 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 561 | |
| 562 | //YJ,add,080828,for keep alive |
| 563 | if((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS) |
| 564 | { |
| 565 | if(!memcmp(hdr->addr1,dev->dev_addr, ETH_ALEN)) |
| 566 | { |
| 567 | ieee->NumRxUnicast++; |
| 568 | } |
| 569 | } |
| 570 | else |
| 571 | { |
| 572 | if(!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) |
| 573 | { |
| 574 | ieee->NumRxUnicast++; |
| 575 | } |
| 576 | } |
| 577 | //YJ,add,080828,for keep alive,end |
| 578 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 579 | hdrlen = ieee80211_get_hdrlen(fc); |
| 580 | |
| 581 | #ifdef NOT_YET |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 582 | /* Put this code here so that we avoid duplicating it in all |
| 583 | * Rx paths. - Jean II */ |
| 584 | #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ |
| 585 | /* If spy monitoring on */ |
| 586 | if (iface->spy_data.spy_number > 0) { |
| 587 | struct iw_quality wstats; |
| 588 | wstats.level = rx_stats->signal; |
| 589 | wstats.noise = rx_stats->noise; |
| 590 | wstats.updated = 6; /* No qual value */ |
| 591 | /* Update spy records */ |
| 592 | wireless_spy_update(dev, hdr->addr2, &wstats); |
| 593 | } |
| 594 | #endif /* IW_WIRELESS_SPY */ |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 595 | hostap_update_rx_stats(local->ap, hdr, rx_stats); |
| 596 | #endif |
| 597 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 598 | if (ieee->iw_mode == IW_MODE_MONITOR) { |
| 599 | ieee80211_monitor_rx(ieee, skb, rx_stats); |
| 600 | stats->rx_packets++; |
| 601 | stats->rx_bytes += skb->len; |
| 602 | return 1; |
| 603 | } |
Bartlomiej Zolnierkiewicz | 8efff17 | 2009-06-13 18:31:18 +0200 | [diff] [blame] | 604 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 605 | if (ieee->host_decrypt) { |
| 606 | int idx = 0; |
| 607 | if (skb->len >= hdrlen + 3) |
| 608 | idx = skb->data[hdrlen + 3] >> 6; |
| 609 | crypt = ieee->crypt[idx]; |
| 610 | #ifdef NOT_YET |
| 611 | sta = NULL; |
| 612 | |
| 613 | /* Use station specific key to override default keys if the |
| 614 | * receiver address is a unicast address ("individual RA"). If |
| 615 | * bcrx_sta_key parameter is set, station specific key is used |
| 616 | * even with broad/multicast targets (this is against IEEE |
| 617 | * 802.11, but makes it easier to use different keys with |
| 618 | * stations that do not support WEP key mapping). */ |
| 619 | |
| 620 | if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) |
| 621 | (void) hostap_handle_sta_crypto(local, hdr, &crypt, |
| 622 | &sta); |
| 623 | #endif |
| 624 | |
| 625 | /* allow NULL decrypt to indicate an station specific override |
| 626 | * for default encryption */ |
| 627 | if (crypt && (crypt->ops == NULL || |
| 628 | crypt->ops->decrypt_mpdu == NULL)) |
| 629 | crypt = NULL; |
| 630 | |
| 631 | if (!crypt && (fc & IEEE80211_FCTL_WEP)) { |
| 632 | /* This seems to be triggered by some (multicast?) |
| 633 | * frames from other than current BSS, so just drop the |
| 634 | * frames silently instead of filling system log with |
| 635 | * these reports. */ |
| 636 | IEEE80211_DEBUG_DROP("Decryption failed (not set)" |
| 637 | " (SA=" MAC_FMT ")\n", |
| 638 | MAC_ARG(hdr->addr2)); |
| 639 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 640 | goto rx_dropped; |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | if (skb->len < IEEE80211_DATA_HDR3_LEN) |
| 645 | goto rx_dropped; |
| 646 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 647 | // if QoS enabled, should check the sequence for each of the AC |
| 648 | if (is_duplicate_packet(ieee, hdr)) |
| 649 | goto rx_dropped; |
| 650 | |
| 651 | |
| 652 | if (type == IEEE80211_FTYPE_MGMT) { |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 653 | if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) |
| 654 | goto rx_dropped; |
| 655 | else |
| 656 | goto rx_exit; |
| 657 | } |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 658 | |
| 659 | /* Data frame - extract src/dst addresses */ |
| 660 | switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { |
| 661 | case IEEE80211_FCTL_FROMDS: |
| 662 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 663 | memcpy(src, hdr->addr3, ETH_ALEN); |
| 664 | memcpy(bssid,hdr->addr2,ETH_ALEN); |
| 665 | break; |
| 666 | case IEEE80211_FCTL_TODS: |
| 667 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 668 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 669 | memcpy(bssid,hdr->addr1,ETH_ALEN); |
| 670 | break; |
| 671 | case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: |
| 672 | if (skb->len < IEEE80211_DATA_HDR4_LEN) |
| 673 | goto rx_dropped; |
| 674 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 675 | memcpy(src, hdr->addr4, ETH_ALEN); |
| 676 | memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); |
| 677 | break; |
| 678 | case 0: |
| 679 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 680 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 681 | memcpy(bssid,hdr->addr3,ETH_ALEN); |
| 682 | break; |
| 683 | } |
| 684 | |
| 685 | #ifdef NOT_YET |
| 686 | if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) |
| 687 | goto rx_dropped; |
| 688 | if (wds) { |
| 689 | skb->dev = dev = wds; |
| 690 | stats = hostap_get_stats(dev); |
| 691 | } |
| 692 | |
| 693 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && |
| 694 | (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS && |
| 695 | ieee->stadev && |
| 696 | memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { |
| 697 | /* Frame from BSSID of the AP for which we are a client */ |
| 698 | skb->dev = dev = ieee->stadev; |
| 699 | stats = hostap_get_stats(dev); |
| 700 | from_assoc_ap = 1; |
| 701 | } |
| 702 | #endif |
| 703 | |
| 704 | dev->last_rx = jiffies; |
| 705 | |
| 706 | #ifdef NOT_YET |
| 707 | if ((ieee->iw_mode == IW_MODE_MASTER || |
| 708 | ieee->iw_mode == IW_MODE_REPEAT) && |
| 709 | !from_assoc_ap) { |
| 710 | switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, |
| 711 | wds != NULL)) { |
| 712 | case AP_RX_CONTINUE_NOT_AUTHORIZED: |
| 713 | frame_authorized = 0; |
| 714 | break; |
| 715 | case AP_RX_CONTINUE: |
| 716 | frame_authorized = 1; |
| 717 | break; |
| 718 | case AP_RX_DROP: |
| 719 | goto rx_dropped; |
| 720 | case AP_RX_EXIT: |
| 721 | goto rx_exit; |
| 722 | } |
| 723 | } |
| 724 | #endif |
| 725 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 726 | /* Nullfunc frames may have PS-bit set, so they must be passed to |
| 727 | * hostap_handle_sta_rx() before being dropped here. */ |
| 728 | if (stype != IEEE80211_STYPE_DATA && |
| 729 | stype != IEEE80211_STYPE_DATA_CFACK && |
| 730 | stype != IEEE80211_STYPE_DATA_CFPOLL && |
| 731 | stype != IEEE80211_STYPE_DATA_CFACKPOLL&& |
| 732 | stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4 |
| 733 | ) { |
| 734 | if (stype != IEEE80211_STYPE_NULLFUNC) |
| 735 | IEEE80211_DEBUG_DROP( |
| 736 | "RX: dropped data frame " |
| 737 | "with no data (type=0x%02x, " |
| 738 | "subtype=0x%02x, len=%d)\n", |
| 739 | type, stype, skb->len); |
| 740 | goto rx_dropped; |
| 741 | } |
| 742 | if(memcmp(bssid,ieee->current_network.bssid,ETH_ALEN)) { |
| 743 | goto rx_dropped; |
| 744 | } |
| 745 | |
| 746 | ieee->NumRxDataInPeriod++; |
| 747 | ieee->NumRxOkTotal++; |
| 748 | /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ |
| 749 | |
| 750 | if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && |
| 751 | (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) |
| 752 | goto rx_dropped; |
| 753 | |
| 754 | hdr = (struct ieee80211_hdr *) skb->data; |
| 755 | |
| 756 | /* skb: hdr + (possibly fragmented) plaintext payload */ |
| 757 | // PR: FIXME: hostap has additional conditions in the "if" below: |
| 758 | // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && |
| 759 | if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { |
| 760 | int flen; |
| 761 | struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); |
| 762 | IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); |
| 763 | |
| 764 | if (!frag_skb) { |
| 765 | IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, |
| 766 | "Rx cannot get skb from fragment " |
| 767 | "cache (morefrag=%d seq=%u frag=%u)\n", |
| 768 | (fc & IEEE80211_FCTL_MOREFRAGS) != 0, |
| 769 | WLAN_GET_SEQ_SEQ(sc), frag); |
| 770 | goto rx_dropped; |
| 771 | } |
| 772 | flen = skb->len; |
| 773 | if (frag != 0) |
| 774 | flen -= hdrlen; |
| 775 | |
| 776 | if (frag_skb->tail + flen > frag_skb->end) { |
| 777 | printk(KERN_WARNING "%s: host decrypted and " |
| 778 | "reassembled frame did not fit skb\n", |
| 779 | dev->name); |
| 780 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 781 | goto rx_dropped; |
| 782 | } |
| 783 | |
| 784 | if (frag == 0) { |
| 785 | /* copy first fragment (including full headers) into |
| 786 | * beginning of the fragment cache skb */ |
| 787 | memcpy(skb_put(frag_skb, flen), skb->data, flen); |
| 788 | } else { |
| 789 | /* append frame payload to the end of the fragment |
| 790 | * cache skb */ |
| 791 | memcpy(skb_put(frag_skb, flen), skb->data + hdrlen, |
| 792 | flen); |
| 793 | } |
| 794 | dev_kfree_skb_any(skb); |
| 795 | skb = NULL; |
| 796 | |
| 797 | if (fc & IEEE80211_FCTL_MOREFRAGS) { |
| 798 | /* more fragments expected - leave the skb in fragment |
| 799 | * cache for now; it will be delivered to upper layers |
| 800 | * after all fragments have been received */ |
| 801 | goto rx_exit; |
| 802 | } |
| 803 | |
| 804 | /* this was the last fragment and the frame will be |
| 805 | * delivered, so remove skb from fragment cache */ |
| 806 | skb = frag_skb; |
| 807 | hdr = (struct ieee80211_hdr *) skb->data; |
| 808 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 809 | } |
| 810 | |
| 811 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still |
| 812 | * encrypted/authenticated */ |
| 813 | if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && |
| 814 | ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) |
| 815 | goto rx_dropped; |
| 816 | |
| 817 | hdr = (struct ieee80211_hdr *) skb->data; |
| 818 | if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { |
| 819 | if (/*ieee->ieee802_1x &&*/ |
| 820 | ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { |
| 821 | |
| 822 | #ifdef CONFIG_IEEE80211_DEBUG |
| 823 | /* pass unencrypted EAPOL frames even if encryption is |
| 824 | * configured */ |
| 825 | struct eapol *eap = (struct eapol *)(skb->data + |
| 826 | 24); |
| 827 | IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 828 | eap_get_type(eap->type)); |
| 829 | #endif |
| 830 | } else { |
| 831 | IEEE80211_DEBUG_DROP( |
| 832 | "encryption configured, but RX " |
| 833 | "frame not encrypted (SA=" MAC_FMT ")\n", |
| 834 | MAC_ARG(hdr->addr2)); |
| 835 | goto rx_dropped; |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | #ifdef CONFIG_IEEE80211_DEBUG |
| 840 | if (crypt && !(fc & IEEE80211_FCTL_WEP) && |
| 841 | ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { |
| 842 | struct eapol *eap = (struct eapol *)(skb->data + |
| 843 | 24); |
| 844 | IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 845 | eap_get_type(eap->type)); |
| 846 | } |
| 847 | #endif |
| 848 | |
| 849 | if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && |
| 850 | !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { |
| 851 | IEEE80211_DEBUG_DROP( |
| 852 | "dropped unencrypted RX data " |
| 853 | "frame from " MAC_FMT |
| 854 | " (drop_unencrypted=1)\n", |
| 855 | MAC_ARG(hdr->addr2)); |
| 856 | goto rx_dropped; |
| 857 | } |
| 858 | /* |
| 859 | if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { |
| 860 | printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); |
| 861 | } |
| 862 | */ |
| 863 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
| 864 | payload = skb->data + hdrlen; |
| 865 | ethertype = (payload[6] << 8) | payload[7]; |
| 866 | |
| 867 | #ifdef NOT_YET |
| 868 | /* If IEEE 802.1X is used, check whether the port is authorized to send |
| 869 | * the received frame. */ |
| 870 | if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) { |
| 871 | if (ethertype == ETH_P_PAE) { |
| 872 | printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n", |
| 873 | dev->name); |
| 874 | if (ieee->hostapd && ieee->apdev) { |
| 875 | /* Send IEEE 802.1X frames to the user |
| 876 | * space daemon for processing */ |
| 877 | prism2_rx_80211(ieee->apdev, skb, rx_stats, |
| 878 | PRISM2_RX_MGMT); |
| 879 | ieee->apdevstats.rx_packets++; |
| 880 | ieee->apdevstats.rx_bytes += skb->len; |
| 881 | goto rx_exit; |
| 882 | } |
| 883 | } else if (!frame_authorized) { |
| 884 | printk(KERN_DEBUG "%s: dropped frame from " |
| 885 | "unauthorized port (IEEE 802.1X): " |
| 886 | "ethertype=0x%04x\n", |
| 887 | dev->name, ethertype); |
| 888 | goto rx_dropped; |
| 889 | } |
| 890 | } |
| 891 | #endif |
| 892 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 893 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 894 | if (skb->len - hdrlen >= 8 && |
| 895 | ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 && |
| 896 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 897 | memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 898 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 899 | * replace EtherType */ |
| 900 | skb_pull(skb, hdrlen + SNAP_SIZE); |
| 901 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 902 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 903 | } else { |
| 904 | u16 len; |
| 905 | /* Leave Ethernet header part of hdr and full payload */ |
| 906 | skb_pull(skb, hdrlen); |
| 907 | len = htons(skb->len); |
| 908 | memcpy(skb_push(skb, 2), &len, 2); |
| 909 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 910 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 911 | } |
| 912 | |
| 913 | #ifdef NOT_YET |
| 914 | if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 915 | IEEE80211_FCTL_TODS) && |
| 916 | skb->len >= ETH_HLEN + ETH_ALEN) { |
| 917 | /* Non-standard frame: get addr4 from its bogus location after |
| 918 | * the payload */ |
| 919 | memcpy(skb->data + ETH_ALEN, |
| 920 | skb->data + skb->len - ETH_ALEN, ETH_ALEN); |
| 921 | skb_trim(skb, skb->len - ETH_ALEN); |
| 922 | } |
| 923 | #endif |
| 924 | |
| 925 | stats->rx_packets++; |
| 926 | stats->rx_bytes += skb->len; |
| 927 | |
| 928 | #ifdef NOT_YET |
| 929 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && |
| 930 | ieee->ap->bridge_packets) { |
| 931 | if (dst[0] & 0x01) { |
| 932 | /* copy multicast frame both to the higher layers and |
| 933 | * to the wireless media */ |
| 934 | ieee->ap->bridged_multicast++; |
| 935 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 936 | if (skb2 == NULL) |
| 937 | printk(KERN_DEBUG "%s: skb_clone failed for " |
| 938 | "multicast frame\n", dev->name); |
| 939 | } else if (hostap_is_sta_assoc(ieee->ap, dst)) { |
| 940 | /* send frame directly to the associated STA using |
| 941 | * wireless media and not passing to higher layers */ |
| 942 | ieee->ap->bridged_unicast++; |
| 943 | skb2 = skb; |
| 944 | skb = NULL; |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | if (skb2 != NULL) { |
| 949 | /* send to wireless media */ |
| 950 | skb2->protocol = __constant_htons(ETH_P_802_3); |
| 951 | skb2->mac.raw = skb2->nh.raw = skb2->data; |
| 952 | /* skb2->nh.raw = skb2->data + ETH_HLEN; */ |
| 953 | skb2->dev = dev; |
| 954 | dev_queue_xmit(skb2); |
| 955 | } |
| 956 | |
| 957 | #endif |
| 958 | if (skb) { |
| 959 | skb->protocol = eth_type_trans(skb, dev); |
| 960 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 961 | skb->dev = dev; |
| 962 | skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
| 963 | ieee->last_rx_ps_time = jiffies; |
| 964 | netif_rx(skb); |
| 965 | } |
| 966 | |
| 967 | rx_exit: |
| 968 | #ifdef NOT_YET |
| 969 | if (sta) |
| 970 | hostap_handle_sta_release(sta); |
| 971 | #endif |
| 972 | return 1; |
| 973 | |
| 974 | rx_dropped: |
| 975 | stats->rx_dropped++; |
| 976 | |
| 977 | /* Returning 0 indicates to caller that we have not handled the SKB-- |
| 978 | * so it is still allocated and can be used again by underlying |
| 979 | * hardware as a DMA target */ |
| 980 | return 0; |
| 981 | } |
| 982 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 983 | #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 |
| 984 | |
| 985 | static inline int ieee80211_is_ofdm_rate(u8 rate) |
| 986 | { |
| 987 | switch (rate & ~IEEE80211_BASIC_RATE_MASK) { |
| 988 | case IEEE80211_OFDM_RATE_6MB: |
| 989 | case IEEE80211_OFDM_RATE_9MB: |
| 990 | case IEEE80211_OFDM_RATE_12MB: |
| 991 | case IEEE80211_OFDM_RATE_18MB: |
| 992 | case IEEE80211_OFDM_RATE_24MB: |
| 993 | case IEEE80211_OFDM_RATE_36MB: |
| 994 | case IEEE80211_OFDM_RATE_48MB: |
| 995 | case IEEE80211_OFDM_RATE_54MB: |
| 996 | return 1; |
| 997 | } |
| 998 | return 0; |
| 999 | } |
| 1000 | |
| 1001 | static inline int ieee80211_SignalStrengthTranslate( |
| 1002 | int CurrSS |
| 1003 | ) |
| 1004 | { |
| 1005 | int RetSS; |
| 1006 | |
| 1007 | // Step 1. Scale mapping. |
| 1008 | if(CurrSS >= 71 && CurrSS <= 100) |
| 1009 | { |
| 1010 | RetSS = 90 + ((CurrSS - 70) / 3); |
| 1011 | } |
| 1012 | else if(CurrSS >= 41 && CurrSS <= 70) |
| 1013 | { |
| 1014 | RetSS = 78 + ((CurrSS - 40) / 3); |
| 1015 | } |
| 1016 | else if(CurrSS >= 31 && CurrSS <= 40) |
| 1017 | { |
| 1018 | RetSS = 66 + (CurrSS - 30); |
| 1019 | } |
| 1020 | else if(CurrSS >= 21 && CurrSS <= 30) |
| 1021 | { |
| 1022 | RetSS = 54 + (CurrSS - 20); |
| 1023 | } |
| 1024 | else if(CurrSS >= 5 && CurrSS <= 20) |
| 1025 | { |
| 1026 | RetSS = 42 + (((CurrSS - 5) * 2) / 3); |
| 1027 | } |
| 1028 | else if(CurrSS == 4) |
| 1029 | { |
| 1030 | RetSS = 36; |
| 1031 | } |
| 1032 | else if(CurrSS == 3) |
| 1033 | { |
| 1034 | RetSS = 27; |
| 1035 | } |
| 1036 | else if(CurrSS == 2) |
| 1037 | { |
| 1038 | RetSS = 18; |
| 1039 | } |
| 1040 | else if(CurrSS == 1) |
| 1041 | { |
| 1042 | RetSS = 9; |
| 1043 | } |
| 1044 | else |
| 1045 | { |
| 1046 | RetSS = CurrSS; |
| 1047 | } |
| 1048 | //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); |
| 1049 | |
| 1050 | // Step 2. Smoothing. |
| 1051 | |
| 1052 | //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); |
| 1053 | |
| 1054 | return RetSS; |
| 1055 | } |
| 1056 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1057 | static inline void ieee80211_extract_country_ie( |
| 1058 | struct ieee80211_device *ieee, |
| 1059 | struct ieee80211_info_element *info_element, |
| 1060 | struct ieee80211_network *network, |
| 1061 | u8 * addr2 |
| 1062 | ) |
| 1063 | { |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1064 | if(IS_DOT11D_ENABLE(ieee)) |
| 1065 | { |
| 1066 | if(info_element->len!= 0) |
| 1067 | { |
| 1068 | memcpy(network->CountryIeBuf, info_element->data, info_element->len); |
| 1069 | network->CountryIeLen = info_element->len; |
| 1070 | |
| 1071 | if(!IS_COUNTRY_IE_VALID(ieee)) |
| 1072 | { |
| 1073 | Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data); |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | // |
| 1078 | // 070305, rcnjko: I update country IE watch dog here because |
| 1079 | // some AP (e.g. Cisco 1242) don't include country IE in their |
| 1080 | // probe response frame. |
| 1081 | // |
| 1082 | if(IS_EQUAL_CIE_SRC(ieee, addr2) ) |
| 1083 | { |
| 1084 | UPDATE_CIE_WATCHDOG(ieee); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | } |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1089 | |
| 1090 | int |
| 1091 | ieee80211_TranslateToDbm( |
| 1092 | unsigned char SignalStrengthIndex // 0-100 index. |
| 1093 | ) |
| 1094 | { |
| 1095 | unsigned char SignalPower; // in dBm. |
| 1096 | |
| 1097 | // Translate to dBm (x=0.5y-95). |
| 1098 | SignalPower = (int)SignalStrengthIndex * 7 / 10; |
| 1099 | SignalPower -= 95; |
| 1100 | |
| 1101 | return SignalPower; |
| 1102 | } |
| 1103 | inline int ieee80211_network_init( |
| 1104 | struct ieee80211_device *ieee, |
| 1105 | struct ieee80211_probe_response *beacon, |
| 1106 | struct ieee80211_network *network, |
| 1107 | struct ieee80211_rx_stats *stats) |
| 1108 | { |
| 1109 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1110 | char rates_str[64]; |
| 1111 | char *p; |
| 1112 | #endif |
| 1113 | struct ieee80211_info_element *info_element; |
| 1114 | u16 left; |
| 1115 | u8 i; |
| 1116 | short offset; |
| 1117 | u8 curRate = 0,hOpRate = 0,curRate_ex = 0; |
| 1118 | |
| 1119 | /* Pull out fixed field data */ |
| 1120 | memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); |
| 1121 | network->capability = beacon->capability; |
| 1122 | network->last_scanned = jiffies; |
| 1123 | network->time_stamp[0] = beacon->time_stamp[0]; |
| 1124 | network->time_stamp[1] = beacon->time_stamp[1]; |
| 1125 | network->beacon_interval = beacon->beacon_interval; |
| 1126 | /* Where to pull this? beacon->listen_interval;*/ |
| 1127 | network->listen_interval = 0x0A; |
| 1128 | network->rates_len = network->rates_ex_len = 0; |
| 1129 | network->last_associate = 0; |
| 1130 | network->ssid_len = 0; |
| 1131 | network->flags = 0; |
| 1132 | network->atim_window = 0; |
| 1133 | network->QoS_Enable = 0; |
| 1134 | //by amy 080312 |
| 1135 | network->HighestOperaRate = 0; |
| 1136 | //by amy 080312 |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1137 | network->Turbo_Enable = 0; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1138 | network->CountryIeLen = 0; |
| 1139 | memset(network->CountryIeBuf, 0, MAX_IE_LEN); |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1140 | |
| 1141 | if (stats->freq == IEEE80211_52GHZ_BAND) { |
| 1142 | /* for A band (No DS info) */ |
| 1143 | network->channel = stats->received_channel; |
| 1144 | } else |
| 1145 | network->flags |= NETWORK_HAS_CCK; |
| 1146 | |
| 1147 | network->wpa_ie_len = 0; |
| 1148 | network->rsn_ie_len = 0; |
| 1149 | |
| 1150 | info_element = &beacon->info_element; |
| 1151 | left = stats->len - ((void *)info_element - (void *)beacon); |
| 1152 | while (left >= sizeof(struct ieee80211_info_element_hdr)) { |
| 1153 | if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) { |
| 1154 | IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n", |
| 1155 | info_element->len + sizeof(struct ieee80211_info_element), |
| 1156 | left); |
| 1157 | return 1; |
| 1158 | } |
| 1159 | |
| 1160 | switch (info_element->id) { |
| 1161 | case MFIE_TYPE_SSID: |
| 1162 | if (ieee80211_is_empty_essid(info_element->data, |
| 1163 | info_element->len)) { |
| 1164 | network->flags |= NETWORK_EMPTY_ESSID; |
| 1165 | break; |
| 1166 | } |
| 1167 | |
| 1168 | network->ssid_len = min(info_element->len, |
| 1169 | (u8)IW_ESSID_MAX_SIZE); |
| 1170 | memcpy(network->ssid, info_element->data, network->ssid_len); |
| 1171 | if (network->ssid_len < IW_ESSID_MAX_SIZE) |
| 1172 | memset(network->ssid + network->ssid_len, 0, |
| 1173 | IW_ESSID_MAX_SIZE - network->ssid_len); |
| 1174 | |
| 1175 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n", |
| 1176 | network->ssid, network->ssid_len); |
| 1177 | break; |
| 1178 | |
| 1179 | case MFIE_TYPE_RATES: |
| 1180 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1181 | p = rates_str; |
| 1182 | #endif |
| 1183 | network->rates_len = min(info_element->len, MAX_RATES_LENGTH); |
| 1184 | for (i = 0; i < network->rates_len; i++) { |
| 1185 | network->rates[i] = info_element->data[i]; |
| 1186 | curRate = network->rates[i] & 0x7f; |
| 1187 | if( hOpRate < curRate ) |
| 1188 | hOpRate = curRate; |
| 1189 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1190 | p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]); |
| 1191 | #endif |
| 1192 | if (ieee80211_is_ofdm_rate(info_element->data[i])) { |
| 1193 | network->flags |= NETWORK_HAS_OFDM; |
| 1194 | if (info_element->data[i] & |
| 1195 | IEEE80211_BASIC_RATE_MASK) |
| 1196 | network->flags &= |
| 1197 | ~NETWORK_HAS_CCK; |
| 1198 | } |
| 1199 | } |
| 1200 | |
| 1201 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n", |
| 1202 | rates_str, network->rates_len); |
| 1203 | break; |
| 1204 | |
| 1205 | case MFIE_TYPE_RATES_EX: |
| 1206 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1207 | p = rates_str; |
| 1208 | #endif |
| 1209 | network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH); |
| 1210 | for (i = 0; i < network->rates_ex_len; i++) { |
| 1211 | network->rates_ex[i] = info_element->data[i]; |
| 1212 | curRate_ex = network->rates_ex[i] & 0x7f; |
| 1213 | if( hOpRate < curRate_ex ) |
| 1214 | hOpRate = curRate_ex; |
| 1215 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1216 | p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]); |
| 1217 | #endif |
| 1218 | if (ieee80211_is_ofdm_rate(info_element->data[i])) { |
| 1219 | network->flags |= NETWORK_HAS_OFDM; |
| 1220 | if (info_element->data[i] & |
| 1221 | IEEE80211_BASIC_RATE_MASK) |
| 1222 | network->flags &= |
| 1223 | ~NETWORK_HAS_CCK; |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n", |
| 1228 | rates_str, network->rates_ex_len); |
| 1229 | break; |
| 1230 | |
| 1231 | case MFIE_TYPE_DS_SET: |
| 1232 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n", |
| 1233 | info_element->data[0]); |
| 1234 | if (stats->freq == IEEE80211_24GHZ_BAND) |
| 1235 | network->channel = info_element->data[0]; |
| 1236 | break; |
| 1237 | |
| 1238 | case MFIE_TYPE_FH_SET: |
| 1239 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n"); |
| 1240 | break; |
| 1241 | |
| 1242 | case MFIE_TYPE_CF_SET: |
| 1243 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n"); |
| 1244 | break; |
| 1245 | |
| 1246 | case MFIE_TYPE_TIM: |
| 1247 | |
| 1248 | if(info_element->len < 4) |
| 1249 | break; |
| 1250 | |
| 1251 | network->dtim_period = info_element->data[1]; |
| 1252 | |
| 1253 | if(ieee->state != IEEE80211_LINKED) |
| 1254 | break; |
Bartlomiej Zolnierkiewicz | 5521a51 | 2009-06-28 16:19:23 +0200 | [diff] [blame^] | 1255 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1256 | network->last_dtim_sta_time[0] = jiffies; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1257 | network->last_dtim_sta_time[1] = stats->mac_time[1]; |
| 1258 | |
| 1259 | network->dtim_data = IEEE80211_DTIM_VALID; |
| 1260 | |
| 1261 | if(info_element->data[0] != 0) |
| 1262 | break; |
| 1263 | |
| 1264 | if(info_element->data[2] & 1) |
| 1265 | network->dtim_data |= IEEE80211_DTIM_MBCAST; |
| 1266 | |
| 1267 | offset = (info_element->data[2] >> 1)*2; |
| 1268 | |
| 1269 | //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id); |
| 1270 | |
| 1271 | /* add and modified for ps 2008.1.22 */ |
| 1272 | if(ieee->assoc_id < 8*offset || |
| 1273 | ieee->assoc_id > 8*(offset + info_element->len -3)) { |
| 1274 | break; |
| 1275 | } |
| 1276 | |
| 1277 | offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ; |
| 1278 | |
| 1279 | // printk("offset:%x data:%x, ucast:%d\n", offset, |
| 1280 | // info_element->data[3+offset] , |
| 1281 | // info_element->data[3+offset] & (1<<(ieee->assoc_id%8))); |
| 1282 | |
| 1283 | if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) { |
| 1284 | network->dtim_data |= IEEE80211_DTIM_UCAST; |
| 1285 | } |
| 1286 | break; |
| 1287 | |
| 1288 | case MFIE_TYPE_IBSS_SET: |
| 1289 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n"); |
| 1290 | break; |
| 1291 | |
| 1292 | case MFIE_TYPE_CHALLENGE: |
| 1293 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n"); |
| 1294 | break; |
| 1295 | |
| 1296 | case MFIE_TYPE_GENERIC: |
| 1297 | //nic is 87B |
| 1298 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n", |
| 1299 | info_element->len); |
| 1300 | if (info_element->len >= 4 && |
| 1301 | info_element->data[0] == 0x00 && |
| 1302 | info_element->data[1] == 0x50 && |
| 1303 | info_element->data[2] == 0xf2 && |
| 1304 | info_element->data[3] == 0x01) { |
| 1305 | network->wpa_ie_len = min(info_element->len + 2, |
| 1306 | MAX_WPA_IE_LEN); |
| 1307 | memcpy(network->wpa_ie, info_element, |
| 1308 | network->wpa_ie_len); |
| 1309 | } |
| 1310 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1311 | if (info_element->len == 7 && |
| 1312 | info_element->data[0] == 0x00 && |
| 1313 | info_element->data[1] == 0xe0 && |
| 1314 | info_element->data[2] == 0x4c && |
| 1315 | info_element->data[3] == 0x01 && |
| 1316 | info_element->data[4] == 0x02) { |
| 1317 | network->Turbo_Enable = 1; |
| 1318 | } |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1319 | if (1 == stats->nic_type) {//nic 87 |
| 1320 | break; |
| 1321 | } |
| 1322 | |
| 1323 | if (info_element->len >= 5 && |
| 1324 | info_element->data[0] == 0x00 && |
| 1325 | info_element->data[1] == 0x50 && |
| 1326 | info_element->data[2] == 0xf2 && |
| 1327 | info_element->data[3] == 0x02 && |
| 1328 | info_element->data[4] == 0x00) { |
| 1329 | //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]); |
| 1330 | //WMM Information Element |
| 1331 | network->wmm_info = info_element->data[6]; |
| 1332 | network->QoS_Enable = 1; |
| 1333 | } |
| 1334 | |
| 1335 | if (info_element->len >= 8 && |
| 1336 | info_element->data[0] == 0x00 && |
| 1337 | info_element->data[1] == 0x50 && |
| 1338 | info_element->data[2] == 0xf2 && |
| 1339 | info_element->data[3] == 0x02 && |
| 1340 | info_element->data[4] == 0x01) { |
| 1341 | // Not care about version at present. |
| 1342 | //WMM Information Element |
| 1343 | //printk(KERN_WARNING "wmm info¶m updated: %x\n", info_element->data[6]); |
| 1344 | network->wmm_info = info_element->data[6]; |
| 1345 | //WMM Parameter Element |
| 1346 | memcpy(network->wmm_param, (u8 *)(info_element->data + 8),(info_element->len - 8)); |
| 1347 | network->QoS_Enable = 1; |
| 1348 | } |
| 1349 | break; |
| 1350 | |
| 1351 | case MFIE_TYPE_RSN: |
| 1352 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n", |
| 1353 | info_element->len); |
| 1354 | network->rsn_ie_len = min(info_element->len + 2, |
| 1355 | MAX_WPA_IE_LEN); |
| 1356 | memcpy(network->rsn_ie, info_element, |
| 1357 | network->rsn_ie_len); |
| 1358 | break; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1359 | case MFIE_TYPE_COUNTRY: |
| 1360 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", |
| 1361 | info_element->len); |
| 1362 | // printk("=====>Receive <%s> Country IE\n",network->ssid); |
| 1363 | ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2); |
| 1364 | break; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1365 | default: |
| 1366 | IEEE80211_DEBUG_SCAN("unsupported IE %d\n", |
| 1367 | info_element->id); |
| 1368 | break; |
| 1369 | } |
| 1370 | |
| 1371 | left -= sizeof(struct ieee80211_info_element_hdr) + |
| 1372 | info_element->len; |
| 1373 | info_element = (struct ieee80211_info_element *) |
| 1374 | &info_element->data[info_element->len]; |
| 1375 | } |
| 1376 | //by amy 080312 |
| 1377 | network->HighestOperaRate = hOpRate; |
| 1378 | //by amy 080312 |
| 1379 | network->mode = 0; |
| 1380 | if (stats->freq == IEEE80211_52GHZ_BAND) |
| 1381 | network->mode = IEEE_A; |
| 1382 | else { |
| 1383 | if (network->flags & NETWORK_HAS_OFDM) |
| 1384 | network->mode |= IEEE_G; |
| 1385 | if (network->flags & NETWORK_HAS_CCK) |
| 1386 | network->mode |= IEEE_B; |
| 1387 | } |
| 1388 | |
| 1389 | if (network->mode == 0) { |
| 1390 | IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' " |
| 1391 | "network.\n", |
| 1392 | escape_essid(network->ssid, |
| 1393 | network->ssid_len), |
| 1394 | MAC_ARG(network->bssid)); |
| 1395 | return 1; |
| 1396 | } |
| 1397 | |
| 1398 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) |
| 1399 | network->flags |= NETWORK_EMPTY_ESSID; |
Bartlomiej Zolnierkiewicz | 5521a51 | 2009-06-28 16:19:23 +0200 | [diff] [blame^] | 1400 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1401 | stats->signal = ieee80211_TranslateToDbm(stats->signalstrength); |
| 1402 | //stats->noise = stats->signal - stats->noise; |
| 1403 | stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25; |
| 1404 | memcpy(&network->stats, stats, sizeof(network->stats)); |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
| 1409 | static inline int is_same_network(struct ieee80211_network *src, |
| 1410 | struct ieee80211_network *dst, |
| 1411 | struct ieee80211_device * ieee) |
| 1412 | { |
| 1413 | /* A network is only a duplicate if the channel, BSSID, ESSID |
| 1414 | * and the capability field (in particular IBSS and BSS) all match. |
| 1415 | * We treat all <hidden> with the same BSSID and channel |
| 1416 | * as one network */ |
| 1417 | return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap |
| 1418 | //((src->ssid_len == dst->ssid_len) && |
| 1419 | (src->channel == dst->channel) && |
| 1420 | !memcmp(src->bssid, dst->bssid, ETH_ALEN) && |
| 1421 | (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap |
| 1422 | //!memcmp(src->ssid, dst->ssid, src->ssid_len) && |
| 1423 | ((src->capability & WLAN_CAPABILITY_IBSS) == |
| 1424 | (dst->capability & WLAN_CAPABILITY_IBSS)) && |
| 1425 | ((src->capability & WLAN_CAPABILITY_BSS) == |
| 1426 | (dst->capability & WLAN_CAPABILITY_BSS))); |
| 1427 | } |
| 1428 | |
| 1429 | inline void update_network(struct ieee80211_network *dst, |
| 1430 | struct ieee80211_network *src) |
| 1431 | { |
| 1432 | unsigned char quality = src->stats.signalstrength; |
| 1433 | unsigned char signal = 0; |
| 1434 | unsigned char noise = 0; |
| 1435 | if(dst->stats.signalstrength > 0) { |
| 1436 | quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6; |
| 1437 | } |
| 1438 | signal = ieee80211_TranslateToDbm(quality); |
| 1439 | //noise = signal - src->stats.noise; |
| 1440 | if(dst->stats.noise > 0) |
| 1441 | noise = (dst->stats.noise * 5 + src->stats.noise)/6; |
| 1442 | //if(strcmp(dst->ssid, "linksys_lzm000") == 0) |
| 1443 | // printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal); |
| 1444 | memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); |
| 1445 | dst->stats.signalstrength = quality; |
| 1446 | dst->stats.signal = signal; |
| 1447 | // printk("==================>stats.signal is %d\n",dst->stats.signal); |
| 1448 | dst->stats.noise = noise; |
| 1449 | |
| 1450 | |
| 1451 | dst->capability = src->capability; |
| 1452 | memcpy(dst->rates, src->rates, src->rates_len); |
| 1453 | dst->rates_len = src->rates_len; |
| 1454 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); |
| 1455 | dst->rates_ex_len = src->rates_ex_len; |
| 1456 | dst->HighestOperaRate= src->HighestOperaRate; |
Harvey Harrison | d599edc | 2009-01-07 14:31:57 -0800 | [diff] [blame] | 1457 | //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel); |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1458 | |
| 1459 | //YJ,add,080819,for hidden ap |
| 1460 | if(src->ssid_len > 0) |
| 1461 | { |
| 1462 | //if(src->ssid_len == 13) |
| 1463 | // printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid); |
| 1464 | memset(dst->ssid, 0, dst->ssid_len); |
| 1465 | dst->ssid_len = src->ssid_len; |
| 1466 | memcpy(dst->ssid, src->ssid, src->ssid_len); |
| 1467 | } |
| 1468 | //YJ,add,080819,for hidden ap,end |
| 1469 | |
| 1470 | dst->channel = src->channel; |
| 1471 | dst->mode = src->mode; |
| 1472 | dst->flags = src->flags; |
| 1473 | dst->time_stamp[0] = src->time_stamp[0]; |
| 1474 | dst->time_stamp[1] = src->time_stamp[1]; |
| 1475 | |
| 1476 | dst->beacon_interval = src->beacon_interval; |
| 1477 | dst->listen_interval = src->listen_interval; |
| 1478 | dst->atim_window = src->atim_window; |
| 1479 | dst->dtim_period = src->dtim_period; |
| 1480 | dst->dtim_data = src->dtim_data; |
| 1481 | dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; |
| 1482 | dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; |
| 1483 | // printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data); |
| 1484 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); |
| 1485 | dst->wpa_ie_len = src->wpa_ie_len; |
| 1486 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); |
| 1487 | dst->rsn_ie_len = src->rsn_ie_len; |
| 1488 | |
| 1489 | dst->last_scanned = jiffies; |
| 1490 | /* dst->last_associate is not overwritten */ |
| 1491 | // disable QoS process now, added by David 2006/7/25 |
| 1492 | #if 1 |
| 1493 | dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. |
| 1494 | /* |
| 1495 | if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter |
| 1496 | memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN); |
| 1497 | } |
| 1498 | */ |
| 1499 | if(src->wmm_param[0].ac_aci_acm_aifsn|| \ |
| 1500 | src->wmm_param[1].ac_aci_acm_aifsn|| \ |
| 1501 | src->wmm_param[2].ac_aci_acm_aifsn|| \ |
Roel Kluin | 50fdd34 | 2009-05-18 17:31:36 +0200 | [diff] [blame] | 1502 | src->wmm_param[3].ac_aci_acm_aifsn) { |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1503 | memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); |
| 1504 | } |
| 1505 | dst->QoS_Enable = src->QoS_Enable; |
| 1506 | #else |
| 1507 | dst->QoS_Enable = 1;//for Rtl8187 simulation |
| 1508 | #endif |
| 1509 | dst->SignalStrength = src->SignalStrength; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1510 | dst->Turbo_Enable = src->Turbo_Enable; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1511 | dst->CountryIeLen = src->CountryIeLen; |
| 1512 | memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1513 | } |
| 1514 | |
| 1515 | |
| 1516 | inline void ieee80211_process_probe_response( |
| 1517 | struct ieee80211_device *ieee, |
| 1518 | struct ieee80211_probe_response *beacon, |
| 1519 | struct ieee80211_rx_stats *stats) |
| 1520 | { |
| 1521 | struct ieee80211_network network; |
| 1522 | struct ieee80211_network *target; |
| 1523 | struct ieee80211_network *oldest = NULL; |
| 1524 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1525 | struct ieee80211_info_element *info_element = &beacon->info_element; |
| 1526 | #endif |
| 1527 | unsigned long flags; |
| 1528 | short renew; |
| 1529 | u8 wmm_info; |
| 1530 | u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)? 1:0; //YJ,add,080819,for hidden ap |
| 1531 | |
| 1532 | memset(&network, 0, sizeof(struct ieee80211_network)); |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1533 | |
| 1534 | IEEE80211_DEBUG_SCAN( |
| 1535 | "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", |
| 1536 | escape_essid(info_element->data, info_element->len), |
| 1537 | MAC_ARG(beacon->header.addr3), |
| 1538 | (beacon->capability & (1<<0xf)) ? '1' : '0', |
| 1539 | (beacon->capability & (1<<0xe)) ? '1' : '0', |
| 1540 | (beacon->capability & (1<<0xd)) ? '1' : '0', |
| 1541 | (beacon->capability & (1<<0xc)) ? '1' : '0', |
| 1542 | (beacon->capability & (1<<0xb)) ? '1' : '0', |
| 1543 | (beacon->capability & (1<<0xa)) ? '1' : '0', |
| 1544 | (beacon->capability & (1<<0x9)) ? '1' : '0', |
| 1545 | (beacon->capability & (1<<0x8)) ? '1' : '0', |
| 1546 | (beacon->capability & (1<<0x7)) ? '1' : '0', |
| 1547 | (beacon->capability & (1<<0x6)) ? '1' : '0', |
| 1548 | (beacon->capability & (1<<0x5)) ? '1' : '0', |
| 1549 | (beacon->capability & (1<<0x4)) ? '1' : '0', |
| 1550 | (beacon->capability & (1<<0x3)) ? '1' : '0', |
| 1551 | (beacon->capability & (1<<0x2)) ? '1' : '0', |
| 1552 | (beacon->capability & (1<<0x1)) ? '1' : '0', |
| 1553 | (beacon->capability & (1<<0x0)) ? '1' : '0'); |
Bartlomiej Zolnierkiewicz | 5521a51 | 2009-06-28 16:19:23 +0200 | [diff] [blame^] | 1554 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1555 | if (ieee80211_network_init(ieee, beacon, &network, stats)) { |
| 1556 | IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n", |
| 1557 | escape_essid(info_element->data, |
| 1558 | info_element->len), |
| 1559 | MAC_ARG(beacon->header.addr3), |
| 1560 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 1561 | IEEE80211_STYPE_PROBE_RESP ? |
| 1562 | "PROBE RESPONSE" : "BEACON"); |
| 1563 | return; |
| 1564 | } |
| 1565 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1566 | // For Asus EeePc request, |
| 1567 | // (1) if wireless adapter receive get any 802.11d country code in AP beacon, |
| 1568 | // wireless adapter should follow the country code. |
| 1569 | // (2) If there is no any country code in beacon, |
| 1570 | // then wireless adapter should do active scan from ch1~11 and |
| 1571 | // passive scan from ch12~14 |
| 1572 | if(ieee->bGlobalDomain) |
| 1573 | { |
| 1574 | if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP) |
| 1575 | { |
| 1576 | // Case 1: Country code |
| 1577 | if(IS_COUNTRY_IE_VALID(ieee) ) |
| 1578 | { |
| 1579 | if( !IsLegalChannel(ieee, network.channel) ) |
| 1580 | { |
| 1581 | printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel); |
| 1582 | return; |
| 1583 | } |
| 1584 | } |
| 1585 | // Case 2: No any country code. |
| 1586 | else |
| 1587 | { |
| 1588 | // Filter over channel ch12~14 |
| 1589 | if(network.channel > 11) |
| 1590 | { |
| 1591 | printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel); |
| 1592 | return; |
| 1593 | } |
| 1594 | } |
| 1595 | } |
| 1596 | else |
| 1597 | { |
| 1598 | // Case 1: Country code |
| 1599 | if(IS_COUNTRY_IE_VALID(ieee) ) |
| 1600 | { |
| 1601 | if( !IsLegalChannel(ieee, network.channel) ) |
| 1602 | { |
| 1603 | printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel); |
| 1604 | return; |
| 1605 | } |
| 1606 | } |
| 1607 | // Case 2: No any country code. |
| 1608 | else |
| 1609 | { |
| 1610 | // Filter over channel ch12~14 |
| 1611 | if(network.channel > 14) |
| 1612 | { |
| 1613 | printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel); |
| 1614 | return; |
| 1615 | } |
| 1616 | } |
| 1617 | } |
| 1618 | } |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1619 | /* The network parsed correctly -- so now we scan our known networks |
| 1620 | * to see if we can find it in our list. |
| 1621 | * |
| 1622 | * NOTE: This search is definitely not optimized. Once its doing |
| 1623 | * the "right thing" we'll optimize it for efficiency if |
| 1624 | * necessary */ |
| 1625 | |
| 1626 | /* Search for this entry in the list and update it if it is |
| 1627 | * already there. */ |
| 1628 | |
| 1629 | spin_lock_irqsave(&ieee->lock, flags); |
| 1630 | |
| 1631 | if(is_same_network(&ieee->current_network, &network, ieee)) { |
| 1632 | wmm_info = ieee->current_network.wmm_info; |
| 1633 | //YJ,add,080819,for hidden ap |
| 1634 | if(is_beacon == 0) |
| 1635 | network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags); |
| 1636 | else if(ieee->state == IEEE80211_LINKED) |
| 1637 | ieee->NumRxBcnInPeriod++; |
| 1638 | //YJ,add,080819,for hidden ap,end |
| 1639 | //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid); |
| 1640 | update_network(&ieee->current_network, &network); |
| 1641 | } |
| 1642 | |
| 1643 | list_for_each_entry(target, &ieee->network_list, list) { |
| 1644 | if (is_same_network(target, &network, ieee)) |
| 1645 | break; |
| 1646 | if ((oldest == NULL) || |
| 1647 | (target->last_scanned < oldest->last_scanned)) |
| 1648 | oldest = target; |
| 1649 | } |
| 1650 | |
| 1651 | /* If we didn't find a match, then get a new network slot to initialize |
| 1652 | * with this beacon's information */ |
| 1653 | if (&target->list == &ieee->network_list) { |
| 1654 | if (list_empty(&ieee->network_free_list)) { |
| 1655 | /* If there are no more slots, expire the oldest */ |
| 1656 | list_del(&oldest->list); |
| 1657 | target = oldest; |
| 1658 | IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from " |
| 1659 | "network list.\n", |
| 1660 | escape_essid(target->ssid, |
| 1661 | target->ssid_len), |
| 1662 | MAC_ARG(target->bssid)); |
| 1663 | } else { |
| 1664 | /* Otherwise just pull from the free list */ |
| 1665 | target = list_entry(ieee->network_free_list.next, |
| 1666 | struct ieee80211_network, list); |
| 1667 | list_del(ieee->network_free_list.next); |
| 1668 | } |
| 1669 | |
| 1670 | |
| 1671 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1672 | IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n", |
| 1673 | escape_essid(network.ssid, |
| 1674 | network.ssid_len), |
| 1675 | MAC_ARG(network.bssid), |
| 1676 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 1677 | IEEE80211_STYPE_PROBE_RESP ? |
| 1678 | "PROBE RESPONSE" : "BEACON"); |
| 1679 | #endif |
| 1680 | |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1681 | memcpy(target, &network, sizeof(*target)); |
| 1682 | list_add_tail(&target->list, &ieee->network_list); |
| 1683 | if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) |
| 1684 | ieee80211_softmac_new_net(ieee,&network); |
| 1685 | } else { |
| 1686 | IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n", |
| 1687 | escape_essid(target->ssid, |
| 1688 | target->ssid_len), |
| 1689 | MAC_ARG(target->bssid), |
| 1690 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 1691 | IEEE80211_STYPE_PROBE_RESP ? |
| 1692 | "PROBE RESPONSE" : "BEACON"); |
| 1693 | |
| 1694 | /* we have an entry and we are going to update it. But this entry may |
| 1695 | * be already expired. In this case we do the same as we found a new |
| 1696 | * net and call the new_net handler |
| 1697 | */ |
| 1698 | renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); |
| 1699 | //YJ,add,080819,for hidden ap |
| 1700 | if(is_beacon == 0) |
| 1701 | network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags); |
| 1702 | //if(strncmp(network.ssid, "linksys-c",9) == 0) |
| 1703 | // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags); |
| 1704 | if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ |
| 1705 | && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\ |
| 1706 | ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK)))) |
| 1707 | renew = 1; |
| 1708 | //YJ,add,080819,for hidden ap,end |
| 1709 | update_network(target, &network); |
| 1710 | if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) |
| 1711 | ieee80211_softmac_new_net(ieee,&network); |
| 1712 | } |
| 1713 | |
| 1714 | spin_unlock_irqrestore(&ieee->lock, flags); |
| 1715 | } |
| 1716 | |
| 1717 | void ieee80211_rx_mgt(struct ieee80211_device *ieee, |
| 1718 | struct ieee80211_hdr *header, |
| 1719 | struct ieee80211_rx_stats *stats) |
| 1720 | { |
| 1721 | switch (WLAN_FC_GET_STYPE(header->frame_ctl)) { |
| 1722 | |
| 1723 | case IEEE80211_STYPE_BEACON: |
| 1724 | IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", |
| 1725 | WLAN_FC_GET_STYPE(header->frame_ctl)); |
| 1726 | IEEE80211_DEBUG_SCAN("Beacon\n"); |
| 1727 | ieee80211_process_probe_response( |
| 1728 | ieee, (struct ieee80211_probe_response *)header, stats); |
| 1729 | break; |
| 1730 | |
| 1731 | case IEEE80211_STYPE_PROBE_RESP: |
| 1732 | IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", |
| 1733 | WLAN_FC_GET_STYPE(header->frame_ctl)); |
| 1734 | IEEE80211_DEBUG_SCAN("Probe response\n"); |
| 1735 | ieee80211_process_probe_response( |
| 1736 | ieee, (struct ieee80211_probe_response *)header, stats); |
| 1737 | break; |
Greg Kroah-Hartman | c8d86be | 2008-12-04 20:01:41 -0800 | [diff] [blame] | 1738 | } |
| 1739 | } |