Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [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/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/version.h> |
| 40 | #include <linux/wireless.h> |
| 41 | #include <linux/etherdevice.h> |
| 42 | #include <asm/uaccess.h> |
| 43 | #include <linux/ctype.h> |
| 44 | |
| 45 | #include "rtllib.h" |
| 46 | #ifdef ENABLE_DOT11D |
| 47 | #include "dot11d.h" |
| 48 | #endif |
| 49 | |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 50 | #if defined CONFIG_CFG_80211 |
| 51 | #include <linux/crc32.h> |
| 52 | |
| 53 | struct ieee80211_channel *rtllib_get_channel(struct wiphy *wiphy, |
| 54 | int freq) |
| 55 | { |
| 56 | enum ieee80211_band band; |
| 57 | struct ieee80211_supported_band *sband; |
| 58 | int i; |
| 59 | |
| 60 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 61 | sband = wiphy->bands[band]; |
| 62 | |
| 63 | if (!sband) |
| 64 | continue; |
| 65 | |
| 66 | for (i = 0; i < sband->n_channels; i++) { |
| 67 | if (sband->channels[i].center_freq == freq) |
| 68 | return &sband->channels[i]; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return NULL; |
| 73 | } |
| 74 | |
| 75 | int rtllib_channel_to_frequency(int chan) |
| 76 | { |
| 77 | if (chan < 14) |
| 78 | return 2407 + chan * 5; |
| 79 | |
| 80 | if (chan == 14) |
| 81 | return 2484; |
| 82 | |
| 83 | /* FIXME: 802.11j 17.3.8.3.2 */ |
| 84 | return (chan + 1000) * 5; |
| 85 | } |
| 86 | |
| 87 | u32 rtllib_parse_elems_crc(u8 *start, size_t len, |
| 88 | struct ieee802_11_elems *elems, |
| 89 | u64 filter, u32 crc) |
| 90 | { |
| 91 | size_t left = len; |
| 92 | u8 *pos = start; |
| 93 | bool calc_crc = filter != 0; |
| 94 | |
| 95 | memset(elems, 0, sizeof(*elems)); |
| 96 | elems->ie_start = start; |
| 97 | elems->total_len = len; |
| 98 | |
| 99 | while (left >= 2) { |
| 100 | u8 id, elen; |
| 101 | |
| 102 | id = *pos++; |
| 103 | elen = *pos++; |
| 104 | left -= 2; |
| 105 | |
| 106 | if (elen > left) |
| 107 | break; |
| 108 | |
| 109 | if (calc_crc && id < 64 && (filter & BIT(id))) |
| 110 | crc = crc32_be(crc, pos - 2, elen + 2); |
| 111 | |
| 112 | switch (id) { |
| 113 | case WLAN_EID_SSID: |
| 114 | elems->ssid = pos; |
| 115 | elems->ssid_len = elen; |
| 116 | break; |
| 117 | case WLAN_EID_SUPP_RATES: |
| 118 | elems->supp_rates = pos; |
| 119 | elems->supp_rates_len = elen; |
| 120 | break; |
| 121 | case WLAN_EID_FH_PARAMS: |
| 122 | elems->fh_params = pos; |
| 123 | elems->fh_params_len = elen; |
| 124 | break; |
| 125 | case WLAN_EID_DS_PARAMS: |
| 126 | elems->ds_params = pos; |
| 127 | elems->ds_params_len = elen; |
| 128 | break; |
| 129 | case WLAN_EID_CF_PARAMS: |
| 130 | elems->cf_params = pos; |
| 131 | elems->cf_params_len = elen; |
| 132 | break; |
| 133 | case WLAN_EID_TIM: |
| 134 | if (elen >= sizeof(struct ieee80211_tim_ie)) { |
| 135 | elems->tim = (void *)pos; |
| 136 | elems->tim_len = elen; |
| 137 | } |
| 138 | break; |
| 139 | case WLAN_EID_IBSS_PARAMS: |
| 140 | elems->ibss_params = pos; |
| 141 | elems->ibss_params_len = elen; |
| 142 | break; |
| 143 | case WLAN_EID_CHALLENGE: |
| 144 | elems->challenge = pos; |
| 145 | elems->challenge_len = elen; |
| 146 | break; |
| 147 | case WLAN_EID_VENDOR_SPECIFIC: |
| 148 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
| 149 | pos[2] == 0xf2) { |
| 150 | /* Microsoft OUI (00:50:F2) */ |
| 151 | |
| 152 | if (calc_crc) |
| 153 | crc = crc32_be(crc, pos - 2, elen + 2); |
| 154 | |
| 155 | if (pos[3] == 1) { |
| 156 | /* OUI Type 1 - WPA IE */ |
| 157 | elems->wpa = pos; |
| 158 | elems->wpa_len = elen; |
| 159 | } else if (elen >= 5 && pos[3] == 2) { |
| 160 | /* OUI Type 2 - WMM IE */ |
| 161 | if (pos[4] == 0) { |
| 162 | elems->wmm_info = pos; |
| 163 | elems->wmm_info_len = elen; |
| 164 | } else if (pos[4] == 1) { |
| 165 | elems->wmm_param = pos; |
| 166 | elems->wmm_param_len = elen; |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | break; |
| 171 | case WLAN_EID_RSN: |
| 172 | elems->rsn = pos; |
| 173 | elems->rsn_len = elen; |
| 174 | break; |
| 175 | case WLAN_EID_ERP_INFO: |
| 176 | elems->erp_info = pos; |
| 177 | elems->erp_info_len = elen; |
| 178 | break; |
| 179 | case WLAN_EID_EXT_SUPP_RATES: |
| 180 | elems->ext_supp_rates = pos; |
| 181 | elems->ext_supp_rates_len = elen; |
| 182 | break; |
| 183 | case WLAN_EID_HT_CAPABILITY: |
| 184 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
| 185 | elems->ht_cap_elem = (void *)pos; |
| 186 | break; |
| 187 | case WLAN_EID_HT_INFORMATION: |
| 188 | if (elen >= sizeof(struct ieee80211_ht_info)) |
| 189 | elems->ht_info_elem = (void *)pos; |
| 190 | break; |
| 191 | case WLAN_EID_MESH_ID: |
| 192 | elems->mesh_id = pos; |
| 193 | elems->mesh_id_len = elen; |
| 194 | break; |
| 195 | case WLAN_EID_MESH_CONFIG: |
| 196 | elems->mesh_config = pos; |
| 197 | elems->mesh_config_len = elen; |
| 198 | break; |
| 199 | case WLAN_EID_PEER_LINK: |
| 200 | elems->peer_link = pos; |
| 201 | elems->peer_link_len = elen; |
| 202 | break; |
| 203 | case WLAN_EID_PREQ: |
| 204 | elems->preq = pos; |
| 205 | elems->preq_len = elen; |
| 206 | break; |
| 207 | case WLAN_EID_PREP: |
| 208 | elems->prep = pos; |
| 209 | elems->prep_len = elen; |
| 210 | break; |
| 211 | case WLAN_EID_PERR: |
| 212 | elems->perr = pos; |
| 213 | elems->perr_len = elen; |
| 214 | break; |
| 215 | case WLAN_EID_CHANNEL_SWITCH: |
| 216 | elems->ch_switch_elem = pos; |
| 217 | elems->ch_switch_elem_len = elen; |
| 218 | break; |
| 219 | case WLAN_EID_QUIET: |
| 220 | if (!elems->quiet_elem) { |
| 221 | elems->quiet_elem = pos; |
| 222 | elems->quiet_elem_len = elen; |
| 223 | } |
| 224 | elems->num_of_quiet_elem++; |
| 225 | break; |
| 226 | case WLAN_EID_COUNTRY: |
| 227 | elems->country_elem = pos; |
| 228 | elems->country_elem_len = elen; |
| 229 | break; |
| 230 | case WLAN_EID_PWR_CONSTRAINT: |
| 231 | elems->pwr_constr_elem = pos; |
| 232 | elems->pwr_constr_elem_len = elen; |
| 233 | break; |
| 234 | case WLAN_EID_TIMEOUT_INTERVAL: |
| 235 | elems->timeout_int = pos; |
| 236 | elems->timeout_int_len = elen; |
| 237 | break; |
| 238 | default: |
| 239 | break; |
| 240 | } |
| 241 | |
| 242 | left -= elen; |
| 243 | pos += elen; |
| 244 | } |
| 245 | |
| 246 | return crc; |
| 247 | } |
| 248 | |
| 249 | void rtllib_parse_elems(u8 *start, size_t len, |
| 250 | struct ieee802_11_elems *elems) |
| 251 | { |
| 252 | rtllib_parse_elems_crc(start, len, elems, 0, 0); |
| 253 | } |
| 254 | |
| 255 | void ieee80211_scan_rx(struct rtllib_device *ieee, struct sk_buff *skb, struct rtllib_rx_stats *rx_status) |
| 256 | { |
| 257 | struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ; |
| 258 | struct ieee80211_mgmt *mgmt; |
| 259 | struct ieee80211_bss *bss; |
| 260 | u8 *elements; |
| 261 | struct ieee80211_channel *channel; |
| 262 | size_t baselen; |
| 263 | int freq; |
| 264 | __le16 fc; |
| 265 | bool presp, beacon = false; |
| 266 | struct ieee802_11_elems elems; |
| 267 | s32 signal = 0; |
| 268 | |
| 269 | if (skb->len < 2) |
| 270 | return; |
| 271 | |
| 272 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 273 | fc = mgmt->frame_control; |
| 274 | |
| 275 | if (skb->len < 24) |
| 276 | return; |
| 277 | |
| 278 | presp = (WLAN_FC_GET_STYPE(header->frame_ctl) == RTLLIB_STYPE_PROBE_RESP); |
| 279 | if (presp) { |
| 280 | /* ignore ProbeResp to foreign address */ |
| 281 | if (memcmp(mgmt->da, ieee->dev->dev_addr, ETH_ALEN)) |
| 282 | return ;; |
| 283 | |
| 284 | presp = true; |
| 285 | elements = mgmt->u.probe_resp.variable; |
| 286 | baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); |
| 287 | } else { |
| 288 | beacon = (WLAN_FC_GET_STYPE(header->frame_ctl) == RTLLIB_STYPE_BEACON); |
| 289 | baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); |
| 290 | elements = mgmt->u.beacon.variable; |
| 291 | } |
| 292 | |
| 293 | if (!presp && !beacon) |
| 294 | return; |
| 295 | |
| 296 | if (baselen > skb->len) |
| 297 | return; |
| 298 | |
| 299 | rtllib_parse_elems(elements, skb->len - baselen, &elems); |
| 300 | |
| 301 | if (elems.ds_params && elems.ds_params_len == 1) |
| 302 | freq = rtllib_channel_to_frequency(elems.ds_params[0]); |
| 303 | else |
| 304 | return; |
| 305 | |
| 306 | channel = rtllib_get_channel(ieee->wdev.wiphy, freq); |
| 307 | |
| 308 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 309 | return; |
| 310 | |
| 311 | signal = rx_status->signal * 100; |
| 312 | |
| 313 | bss = (void *)cfg80211_inform_bss_frame(ieee->wdev.wiphy, channel, |
| 314 | mgmt, skb->len, signal, GFP_ATOMIC); |
| 315 | |
| 316 | return; |
| 317 | } |
| 318 | #endif |
| 319 | |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 320 | static inline void rtllib_monitor_rx(struct rtllib_device *ieee, |
| 321 | struct sk_buff *skb,struct rtllib_rx_stats *rx_status, |
| 322 | size_t hdr_length) |
| 323 | { |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 324 | skb->dev = ieee->dev; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 325 | skb_reset_mac_header(skb); |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 326 | skb_pull(skb, hdr_length); |
| 327 | skb->pkt_type = PACKET_OTHERHOST; |
| 328 | skb->protocol = __constant_htons(ETH_P_80211_RAW); |
| 329 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 330 | netif_rx(skb); |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | /* Called only as a tasklet (software IRQ) */ |
| 334 | static struct rtllib_frag_entry * |
| 335 | rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq, |
| 336 | unsigned int frag, u8 tid,u8 *src, u8 *dst) |
| 337 | { |
| 338 | struct rtllib_frag_entry *entry; |
| 339 | int i; |
| 340 | |
| 341 | for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) { |
| 342 | entry = &ieee->frag_cache[tid][i]; |
| 343 | if (entry->skb != NULL && |
| 344 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
| 345 | RTLLIB_DEBUG_FRAG( |
| 346 | "expiring fragment cache entry " |
| 347 | "seq=%u last_frag=%u\n", |
| 348 | entry->seq, entry->last_frag); |
| 349 | dev_kfree_skb_any(entry->skb); |
| 350 | entry->skb = NULL; |
| 351 | } |
| 352 | |
| 353 | if (entry->skb != NULL && entry->seq == seq && |
| 354 | (entry->last_frag + 1 == frag || frag == -1) && |
| 355 | memcmp(entry->src_addr, src, ETH_ALEN) == 0 && |
| 356 | memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) |
| 357 | return entry; |
| 358 | } |
| 359 | |
| 360 | return NULL; |
| 361 | } |
| 362 | |
| 363 | /* Called only as a tasklet (software IRQ) */ |
| 364 | static struct sk_buff * |
| 365 | rtllib_frag_cache_get(struct rtllib_device *ieee, |
| 366 | struct rtllib_hdr_4addr *hdr) |
| 367 | { |
| 368 | struct sk_buff *skb = NULL; |
| 369 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 370 | u16 sc = le16_to_cpu(hdr->seq_ctl); |
| 371 | unsigned int frag = WLAN_GET_SEQ_FRAG(sc); |
| 372 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); |
| 373 | struct rtllib_frag_entry *entry; |
| 374 | struct rtllib_hdr_3addrqos *hdr_3addrqos; |
| 375 | struct rtllib_hdr_4addrqos *hdr_4addrqos; |
| 376 | u8 tid; |
| 377 | |
| 378 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) { |
| 379 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; |
| 380 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 381 | tid = UP2AC(tid); |
| 382 | tid ++; |
| 383 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { |
| 384 | hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; |
| 385 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 386 | tid = UP2AC(tid); |
| 387 | tid ++; |
| 388 | } else { |
| 389 | tid = 0; |
| 390 | } |
| 391 | |
| 392 | if (frag == 0) { |
| 393 | /* Reserve enough space to fit maximum frame length */ |
| 394 | skb = dev_alloc_skb(ieee->dev->mtu + |
| 395 | sizeof(struct rtllib_hdr_4addr) + |
| 396 | 8 /* LLC */ + |
| 397 | 2 /* alignment */ + |
| 398 | 8 /* WEP */ + |
| 399 | ETH_ALEN /* WDS */ + |
| 400 | (RTLLIB_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */); |
| 401 | if (skb == NULL) |
| 402 | return NULL; |
| 403 | |
| 404 | entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; |
| 405 | ieee->frag_next_idx[tid]++; |
| 406 | if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN) |
| 407 | ieee->frag_next_idx[tid] = 0; |
| 408 | |
| 409 | if (entry->skb != NULL) |
| 410 | dev_kfree_skb_any(entry->skb); |
| 411 | |
| 412 | entry->first_frag_time = jiffies; |
| 413 | entry->seq = seq; |
| 414 | entry->last_frag = frag; |
| 415 | entry->skb = skb; |
| 416 | memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); |
| 417 | memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); |
| 418 | } else { |
| 419 | /* received a fragment of a frame for which the head fragment |
| 420 | * should have already been received */ |
| 421 | entry = rtllib_frag_cache_find(ieee, seq, frag, tid,hdr->addr2, |
| 422 | hdr->addr1); |
| 423 | if (entry != NULL) { |
| 424 | entry->last_frag = frag; |
| 425 | skb = entry->skb; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | return skb; |
| 430 | } |
| 431 | |
| 432 | |
| 433 | /* Called only as a tasklet (software IRQ) */ |
| 434 | static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee, |
| 435 | struct rtllib_hdr_4addr *hdr) |
| 436 | { |
| 437 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 438 | u16 sc = le16_to_cpu(hdr->seq_ctl); |
| 439 | unsigned int seq = WLAN_GET_SEQ_SEQ(sc); |
| 440 | struct rtllib_frag_entry *entry; |
| 441 | struct rtllib_hdr_3addrqos *hdr_3addrqos; |
| 442 | struct rtllib_hdr_4addrqos *hdr_4addrqos; |
| 443 | u8 tid; |
| 444 | |
| 445 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) { |
| 446 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr; |
| 447 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 448 | tid = UP2AC(tid); |
| 449 | tid ++; |
| 450 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { |
| 451 | hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr; |
| 452 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 453 | tid = UP2AC(tid); |
| 454 | tid ++; |
| 455 | } else { |
| 456 | tid = 0; |
| 457 | } |
| 458 | |
| 459 | entry = rtllib_frag_cache_find(ieee, seq, -1, tid,hdr->addr2, |
| 460 | hdr->addr1); |
| 461 | |
| 462 | if (entry == NULL) { |
| 463 | RTLLIB_DEBUG_FRAG( |
| 464 | "could not invalidate fragment cache " |
| 465 | "entry (seq=%u)\n", seq); |
| 466 | return -1; |
| 467 | } |
| 468 | |
| 469 | entry->skb = NULL; |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | |
| 474 | |
| 475 | /* rtllib_rx_frame_mgtmt |
| 476 | * |
| 477 | * Responsible for handling management control frames |
| 478 | * |
| 479 | * Called by rtllib_rx */ |
| 480 | static inline int |
| 481 | rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb, |
| 482 | struct rtllib_rx_stats *rx_stats, u16 type, |
| 483 | u16 stype) |
| 484 | { |
| 485 | /* On the struct stats definition there is written that |
| 486 | * this is not mandatory.... but seems that the probe |
| 487 | * response parser uses it |
| 488 | */ |
| 489 | struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data; |
| 490 | |
| 491 | rx_stats->len = skb->len; |
| 492 | rtllib_rx_mgt(ieee,skb,rx_stats); |
| 493 | if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { |
| 494 | dev_kfree_skb_any(skb); |
| 495 | return 0; |
| 496 | } |
| 497 | rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype); |
| 498 | |
| 499 | dev_kfree_skb_any(skb); |
| 500 | |
| 501 | return 0; |
| 502 | |
| 503 | #ifdef NOT_YET |
| 504 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 505 | printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", |
| 506 | ieee->dev->name); |
| 507 | return 0; |
| 508 | /* |
| 509 | hostap_update_sta_ps(ieee, (struct hostap_rtllib_hdr_4addr *) |
| 510 | skb->data);*/ |
| 511 | } |
| 512 | |
| 513 | if (ieee->hostapd && type == RTLLIB_TYPE_MGMT) { |
| 514 | if (stype == WLAN_FC_STYPE_BEACON && |
| 515 | ieee->iw_mode == IW_MODE_MASTER) { |
| 516 | struct sk_buff *skb2; |
| 517 | /* Process beacon frames also in kernel driver to |
| 518 | * update STA(AP) table statistics */ |
| 519 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 520 | if (skb2) |
| 521 | hostap_rx(skb2->dev, skb2, rx_stats); |
| 522 | } |
| 523 | |
| 524 | /* send management frames to the user space daemon for |
| 525 | * processing */ |
| 526 | ieee->apdevstats.rx_packets++; |
| 527 | ieee->apdevstats.rx_bytes += skb->len; |
| 528 | prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 533 | if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { |
| 534 | printk(KERN_DEBUG "%s: unknown management frame " |
| 535 | "(type=0x%02x, stype=0x%02x) dropped\n", |
| 536 | skb->dev->name, type, stype); |
| 537 | return -1; |
| 538 | } |
| 539 | |
| 540 | hostap_rx(skb->dev, skb, rx_stats); |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " |
| 545 | "received in non-Host AP mode\n", skb->dev->name); |
| 546 | return -1; |
| 547 | #endif |
| 548 | } |
| 549 | |
| 550 | #ifndef CONFIG_CFG_80211 |
| 551 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| 552 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| 553 | static unsigned char rfc1042_header[] = |
| 554 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| 555 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| 556 | static unsigned char bridge_tunnel_header[] = |
| 557 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
| 558 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
| 559 | #endif |
| 560 | |
| 561 | /* Called by rtllib_rx_frame_decrypt */ |
| 562 | static int rtllib_is_eapol_frame(struct rtllib_device *ieee, |
| 563 | struct sk_buff *skb, size_t hdrlen) |
| 564 | { |
| 565 | struct net_device *dev = ieee->dev; |
| 566 | u16 fc, ethertype; |
| 567 | struct rtllib_hdr_4addr *hdr; |
| 568 | u8 *pos; |
| 569 | |
| 570 | if (skb->len < 24) |
| 571 | return 0; |
| 572 | |
| 573 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 574 | fc = le16_to_cpu(hdr->frame_ctl); |
| 575 | |
| 576 | /* check that the frame is unicast frame to us */ |
| 577 | if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == |
| 578 | RTLLIB_FCTL_TODS && |
| 579 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && |
| 580 | memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { |
| 581 | /* ToDS frame with own addr BSSID and DA */ |
| 582 | } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == |
| 583 | RTLLIB_FCTL_FROMDS && |
| 584 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { |
| 585 | /* FromDS frame with own addr as DA */ |
| 586 | } else |
| 587 | return 0; |
| 588 | |
| 589 | if (skb->len < 24 + 8) |
| 590 | return 0; |
| 591 | |
| 592 | /* check for port access entity Ethernet type */ |
| 593 | pos = skb->data + hdrlen; |
| 594 | ethertype = (pos[6] << 8) | pos[7]; |
| 595 | if (ethertype == ETH_P_PAE) |
| 596 | return 1; |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | /* Called only as a tasklet (software IRQ), by rtllib_rx */ |
| 602 | static inline int |
| 603 | rtllib_rx_frame_decrypt(struct rtllib_device* ieee, struct sk_buff *skb, |
| 604 | struct rtllib_crypt_data *crypt) |
| 605 | { |
| 606 | struct rtllib_hdr_4addr *hdr; |
| 607 | int res, hdrlen; |
| 608 | |
| 609 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) |
| 610 | return 0; |
| 611 | #if 1 |
| 612 | if (ieee->hwsec_active) |
| 613 | { |
| 614 | cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE); |
| 615 | tcb_desc->bHwSec = 1; |
| 616 | |
| 617 | if (ieee->need_sw_enc) |
| 618 | tcb_desc->bHwSec = 0; |
| 619 | } |
| 620 | #endif |
| 621 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 622 | hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 623 | |
| 624 | #ifdef CONFIG_RTLLIB_CRYPT_TKIP |
| 625 | if (ieee->tkip_countermeasures && |
| 626 | strcmp(crypt->ops->name, "TKIP") == 0) { |
| 627 | if (net_ratelimit()) { |
| 628 | printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " |
| 629 | "received packet from " MAC_FMT "\n", |
| 630 | ieee->dev->name, MAC_ARG(hdr->addr2)); |
| 631 | } |
| 632 | return -1; |
| 633 | } |
| 634 | #endif |
| 635 | |
| 636 | atomic_inc(&crypt->refcnt); |
| 637 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); |
| 638 | atomic_dec(&crypt->refcnt); |
| 639 | if (res < 0) { |
| 640 | RTLLIB_DEBUG_DROP( |
| 641 | "decryption failed (SA=" MAC_FMT |
| 642 | ") res=%d\n", MAC_ARG(hdr->addr2), res); |
| 643 | if (res == -2) |
| 644 | RTLLIB_DEBUG_DROP("Decryption failed ICV " |
| 645 | "mismatch (key %d)\n", |
| 646 | skb->data[hdrlen + 3] >> 6); |
| 647 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 648 | return -1; |
| 649 | } |
| 650 | |
| 651 | return res; |
| 652 | } |
| 653 | |
| 654 | |
| 655 | /* Called only as a tasklet (software IRQ), by rtllib_rx */ |
| 656 | static inline int |
| 657 | rtllib_rx_frame_decrypt_msdu(struct rtllib_device* ieee, struct sk_buff *skb, |
| 658 | int keyidx, struct rtllib_crypt_data *crypt) |
| 659 | { |
| 660 | struct rtllib_hdr_4addr *hdr; |
| 661 | int res, hdrlen; |
| 662 | |
| 663 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) |
| 664 | return 0; |
| 665 | if (ieee->hwsec_active) |
| 666 | { |
| 667 | cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE); |
| 668 | tcb_desc->bHwSec = 1; |
| 669 | |
| 670 | if (ieee->need_sw_enc) |
| 671 | tcb_desc->bHwSec = 0; |
| 672 | } |
| 673 | |
| 674 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 675 | hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 676 | |
| 677 | atomic_inc(&crypt->refcnt); |
| 678 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv,ieee); |
| 679 | atomic_dec(&crypt->refcnt); |
| 680 | if (res < 0) { |
| 681 | printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" |
| 682 | " (SA=" MAC_FMT " keyidx=%d)\n", |
| 683 | ieee->dev->name, MAC_ARG(hdr->addr2), keyidx); |
| 684 | return -1; |
| 685 | } |
| 686 | |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | |
| 691 | /* this function is stolen from ipw2200 driver*/ |
| 692 | #define IEEE_PACKET_RETRY_TIME (5*HZ) |
| 693 | static int is_duplicate_packet(struct rtllib_device *ieee, |
| 694 | struct rtllib_hdr_4addr *header) |
| 695 | { |
| 696 | u16 fc = le16_to_cpu(header->frame_ctl); |
| 697 | u16 sc = le16_to_cpu(header->seq_ctl); |
| 698 | u16 seq = WLAN_GET_SEQ_SEQ(sc); |
| 699 | u16 frag = WLAN_GET_SEQ_FRAG(sc); |
| 700 | u16 *last_seq, *last_frag; |
| 701 | unsigned long *last_time; |
| 702 | struct rtllib_hdr_3addrqos *hdr_3addrqos; |
| 703 | struct rtllib_hdr_4addrqos *hdr_4addrqos; |
| 704 | u8 tid; |
| 705 | |
| 706 | if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) { |
| 707 | hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header; |
| 708 | tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 709 | tid = UP2AC(tid); |
| 710 | tid ++; |
| 711 | } else if (RTLLIB_QOS_HAS_SEQ(fc)) { |
| 712 | hdr_3addrqos = (struct rtllib_hdr_3addrqos*)header; |
| 713 | tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID; |
| 714 | tid = UP2AC(tid); |
| 715 | tid ++; |
| 716 | } else { |
| 717 | tid = 0; |
| 718 | } |
| 719 | |
| 720 | switch (ieee->iw_mode) { |
| 721 | case IW_MODE_ADHOC: |
| 722 | { |
| 723 | struct list_head *p; |
| 724 | struct ieee_ibss_seq *entry = NULL; |
| 725 | u8 *mac = header->addr2; |
| 726 | int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; |
| 727 | list_for_each(p, &ieee->ibss_mac_hash[index]) { |
| 728 | entry = list_entry(p, struct ieee_ibss_seq, list); |
| 729 | if (!memcmp(entry->mac, mac, ETH_ALEN)) |
| 730 | break; |
| 731 | } |
| 732 | if (p == &ieee->ibss_mac_hash[index]) { |
| 733 | entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC); |
| 734 | if (!entry) { |
| 735 | printk(KERN_WARNING "Cannot malloc new mac entry\n"); |
| 736 | return 0; |
| 737 | } |
| 738 | memcpy(entry->mac, mac, ETH_ALEN); |
| 739 | entry->seq_num[tid] = seq; |
| 740 | entry->frag_num[tid] = frag; |
| 741 | entry->packet_time[tid] = jiffies; |
| 742 | list_add(&entry->list, &ieee->ibss_mac_hash[index]); |
| 743 | return 0; |
| 744 | } |
| 745 | last_seq = &entry->seq_num[tid]; |
| 746 | last_frag = &entry->frag_num[tid]; |
| 747 | last_time = &entry->packet_time[tid]; |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | case IW_MODE_INFRA: |
| 752 | last_seq = &ieee->last_rxseq_num[tid]; |
| 753 | last_frag = &ieee->last_rxfrag_num[tid]; |
| 754 | last_time = &ieee->last_packet_time[tid]; |
| 755 | break; |
| 756 | default: |
| 757 | return 0; |
| 758 | } |
| 759 | |
| 760 | if ((*last_seq == seq) && |
| 761 | time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { |
| 762 | if (*last_frag == frag){ |
| 763 | goto drop; |
| 764 | |
| 765 | } |
| 766 | if (*last_frag + 1 != frag) |
| 767 | /* out-of-order fragment */ |
| 768 | goto drop; |
| 769 | } else |
| 770 | *last_seq = seq; |
| 771 | |
| 772 | *last_frag = frag; |
| 773 | *last_time = jiffies; |
| 774 | return 0; |
| 775 | |
| 776 | drop: |
| 777 | |
| 778 | return 1; |
| 779 | } |
| 780 | bool |
| 781 | AddReorderEntry( |
| 782 | PRX_TS_RECORD pTS, |
| 783 | PRX_REORDER_ENTRY pReorderEntry |
| 784 | ) |
| 785 | { |
| 786 | struct list_head *pList = &pTS->RxPendingPktList; |
| 787 | |
| 788 | while(pList->next != &pTS->RxPendingPktList) |
| 789 | { |
| 790 | if ( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) ) |
| 791 | { |
| 792 | pList = pList->next; |
| 793 | } |
| 794 | else if ( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) ) |
| 795 | { |
| 796 | return false; |
| 797 | } |
| 798 | else |
| 799 | { |
| 800 | break; |
| 801 | } |
| 802 | } |
| 803 | pReorderEntry->List.next = pList->next; |
| 804 | pReorderEntry->List.next->prev = &pReorderEntry->List; |
| 805 | pReorderEntry->List.prev = pList; |
| 806 | pList->next = &pReorderEntry->List; |
| 807 | |
| 808 | return true; |
| 809 | } |
| 810 | |
| 811 | void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb** prxbIndicateArray,u8 index) |
| 812 | { |
| 813 | struct net_device_stats *stats = &ieee->stats; |
| 814 | u8 i = 0 , j=0; |
| 815 | u16 ethertype; |
| 816 | for (j = 0; j < index; j++) { |
| 817 | struct rtllib_rxb* prxb = prxbIndicateArray[j]; |
| 818 | for (i = 0; i<prxb->nr_subframes; i++) { |
| 819 | struct sk_buff *sub_skb = prxb->subframes[i]; |
| 820 | |
| 821 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 822 | ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; |
| 823 | if (sub_skb->len >= 8 && |
| 824 | ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && |
| 825 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 826 | memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 827 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 828 | * replace EtherType */ |
| 829 | skb_pull(sub_skb, SNAP_SIZE); |
| 830 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); |
| 831 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); |
| 832 | } else { |
| 833 | u16 len; |
| 834 | /* Leave Ethernet header part of hdr and full payload */ |
| 835 | len = htons(sub_skb->len); |
| 836 | memcpy(skb_push(sub_skb, 2), &len, 2); |
| 837 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); |
| 838 | memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); |
| 839 | } |
| 840 | |
| 841 | /* Indicat the packets to upper layer */ |
| 842 | if (sub_skb) { |
| 843 | stats->rx_packets++; |
| 844 | stats->rx_bytes += sub_skb->len; |
| 845 | |
| 846 | memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); |
| 847 | sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev); |
| 848 | sub_skb->dev = ieee->dev; |
| 849 | sub_skb->dev->stats.rx_packets++; |
| 850 | sub_skb->dev->stats.rx_bytes += sub_skb->len; |
| 851 | #ifdef TCP_CSUM_OFFLOAD_RX |
| 852 | if ( prxb->tcp_csum_valid) |
| 853 | sub_skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 854 | else |
| 855 | sub_skb->ip_summed = CHECKSUM_NONE; |
| 856 | |
| 857 | #else |
| 858 | sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
| 859 | #endif |
| 860 | ieee->last_rx_ps_time = jiffies; |
| 861 | netif_rx(sub_skb); |
| 862 | } |
| 863 | } |
| 864 | kfree(prxb); |
| 865 | prxb = NULL; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | void |
| 870 | rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, PRX_TS_RECORD pTS) |
| 871 | { |
| 872 | PRX_REORDER_ENTRY pRxReorderEntry; |
| 873 | struct rtllib_rxb* RfdArray[REORDER_WIN_SIZE]; |
| 874 | u8 RfdCnt = 0; |
| 875 | |
| 876 | |
| 877 | del_timer_sync(&pTS->RxPktPendingTimer); |
| 878 | while(!list_empty(&pTS->RxPendingPktList)) |
| 879 | { |
| 880 | if (RfdCnt >= REORDER_WIN_SIZE){ |
| 881 | printk("-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__); |
| 882 | break; |
| 883 | } |
| 884 | |
| 885 | pRxReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List); |
| 886 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pRxReorderEntry->SeqNum); |
| 887 | list_del_init(&pRxReorderEntry->List); |
| 888 | |
| 889 | RfdArray[RfdCnt] = pRxReorderEntry->prxb; |
| 890 | |
| 891 | RfdCnt = RfdCnt + 1; |
| 892 | list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List); |
| 893 | } |
| 894 | rtllib_indicate_packets(ieee, RfdArray, RfdCnt); |
| 895 | |
| 896 | pTS->RxIndicateSeq = 0xffff; |
| 897 | |
| 898 | #ifdef MERGE_TO_DO |
| 899 | #endif |
| 900 | } |
| 901 | |
| 902 | |
| 903 | void RxReorderIndicatePacket( struct rtllib_device *ieee, |
| 904 | struct rtllib_rxb* prxb, |
| 905 | PRX_TS_RECORD pTS, |
| 906 | u16 SeqNum) |
| 907 | { |
| 908 | PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; |
| 909 | PRX_REORDER_ENTRY pReorderEntry = NULL; |
| 910 | struct rtllib_rxb* prxbIndicateArray[REORDER_WIN_SIZE]; |
| 911 | u8 WinSize = pHTInfo->RxReorderWinSize; |
| 912 | u16 WinEnd = 0; |
| 913 | u8 index = 0; |
| 914 | bool bMatchWinStart = false, bPktInBuf = false; |
| 915 | unsigned long flags; |
| 916 | |
| 917 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize); |
| 918 | |
| 919 | spin_lock_irqsave(&(ieee->reorder_spinlock), flags); |
| 920 | |
| 921 | WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096; |
| 922 | /* Rx Reorder initialize condition.*/ |
| 923 | if (pTS->RxIndicateSeq == 0xffff) { |
| 924 | pTS->RxIndicateSeq = SeqNum; |
| 925 | } |
| 926 | |
| 927 | /* Drop out the packet which SeqNum is smaller than WinStart */ |
| 928 | if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) { |
| 929 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n", |
| 930 | pTS->RxIndicateSeq, SeqNum); |
| 931 | pHTInfo->RxReorderDropCounter++; |
| 932 | { |
| 933 | int i; |
| 934 | for (i =0; i < prxb->nr_subframes; i++) { |
| 935 | dev_kfree_skb(prxb->subframes[i]); |
| 936 | } |
| 937 | kfree(prxb); |
| 938 | prxb = NULL; |
| 939 | } |
| 940 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); |
| 941 | return; |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Sliding window manipulation. Conditions includes: |
| 946 | * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 |
| 947 | * 2. Incoming SeqNum is larger than the WinEnd => Window shift N |
| 948 | */ |
| 949 | if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) { |
| 950 | pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096; |
| 951 | bMatchWinStart = true; |
| 952 | } else if (SN_LESS(WinEnd, SeqNum)) { |
| 953 | if (SeqNum >= (WinSize - 1)) { |
| 954 | pTS->RxIndicateSeq = SeqNum + 1 -WinSize; |
| 955 | } else { |
| 956 | pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1; |
| 957 | } |
| 958 | RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum); |
| 959 | } |
| 960 | |
| 961 | /* |
| 962 | * Indication process. |
| 963 | * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets |
| 964 | * with the SeqNum smaller than latest WinStart and buffer other packets. |
| 965 | */ |
| 966 | /* For Rx Reorder condition: |
| 967 | * 1. All packets with SeqNum smaller than WinStart => Indicate |
| 968 | * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. |
| 969 | */ |
| 970 | if (bMatchWinStart) { |
| 971 | /* Current packet is going to be indicated.*/ |
| 972 | RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\ |
| 973 | pTS->RxIndicateSeq, SeqNum); |
| 974 | prxbIndicateArray[0] = prxb; |
| 975 | index = 1; |
| 976 | } else { |
| 977 | /* Current packet is going to be inserted into pending list.*/ |
| 978 | if (!list_empty(&ieee->RxReorder_Unused_List)) { |
| 979 | pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List); |
| 980 | list_del_init(&pReorderEntry->List); |
| 981 | |
| 982 | /* Make a reorder entry and insert into a the packet list.*/ |
| 983 | pReorderEntry->SeqNum = SeqNum; |
| 984 | pReorderEntry->prxb = prxb; |
| 985 | |
| 986 | #if 1 |
| 987 | if (!AddReorderEntry(pTS, pReorderEntry)) { |
| 988 | RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n", |
| 989 | __func__, pTS->RxIndicateSeq, SeqNum); |
| 990 | list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List); |
| 991 | { |
| 992 | int i; |
| 993 | for (i =0; i < prxb->nr_subframes; i++) { |
| 994 | dev_kfree_skb(prxb->subframes[i]); |
| 995 | } |
| 996 | kfree(prxb); |
| 997 | prxb = NULL; |
| 998 | } |
| 999 | } else { |
| 1000 | RTLLIB_DEBUG(RTLLIB_DL_REORDER, |
| 1001 | "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum); |
| 1002 | } |
| 1003 | #endif |
| 1004 | } |
| 1005 | else { |
| 1006 | /* |
| 1007 | * Packets are dropped if there is not enough reorder entries. |
| 1008 | * This part shall be modified!! We can just indicate all the |
| 1009 | * packets in buffer and get reorder entries. |
| 1010 | */ |
| 1011 | RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n"); |
| 1012 | { |
| 1013 | int i; |
| 1014 | for (i =0; i < prxb->nr_subframes; i++) { |
| 1015 | dev_kfree_skb(prxb->subframes[i]); |
| 1016 | } |
| 1017 | kfree(prxb); |
| 1018 | prxb = NULL; |
| 1019 | } |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | /* Check if there is any packet need indicate.*/ |
| 1024 | while(!list_empty(&pTS->RxPendingPktList)) { |
| 1025 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): start RREORDER indicate\n",__func__); |
| 1026 | #if 1 |
| 1027 | pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List); |
| 1028 | if ( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) || |
| 1029 | SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) |
| 1030 | { |
| 1031 | /* This protect buffer from overflow. */ |
| 1032 | if (index >= REORDER_WIN_SIZE) { |
| 1033 | RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n"); |
| 1034 | bPktInBuf = true; |
| 1035 | break; |
| 1036 | } |
| 1037 | |
| 1038 | list_del_init(&pReorderEntry->List); |
| 1039 | |
| 1040 | if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) |
| 1041 | pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096; |
| 1042 | |
| 1043 | prxbIndicateArray[index] = pReorderEntry->prxb; |
| 1044 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pReorderEntry->SeqNum); |
| 1045 | index++; |
| 1046 | |
| 1047 | list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List); |
| 1048 | } else { |
| 1049 | bPktInBuf = true; |
| 1050 | break; |
| 1051 | } |
| 1052 | #endif |
| 1053 | } |
| 1054 | |
| 1055 | /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/ |
| 1056 | if (index>0) { |
| 1057 | if (timer_pending(&pTS->RxPktPendingTimer)){ |
| 1058 | del_timer_sync(&pTS->RxPktPendingTimer); |
| 1059 | } |
| 1060 | pTS->RxTimeoutIndicateSeq = 0xffff; |
| 1061 | |
| 1062 | if (index>REORDER_WIN_SIZE){ |
| 1063 | RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n"); |
| 1064 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); |
| 1065 | return; |
| 1066 | } |
| 1067 | rtllib_indicate_packets(ieee, prxbIndicateArray, index); |
| 1068 | bPktInBuf = false; |
| 1069 | } |
| 1070 | |
| 1071 | if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) { |
| 1072 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): SET rx timeout timer\n", __func__); |
| 1073 | pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq; |
| 1074 | mod_timer(&pTS->RxPktPendingTimer, jiffies + MSECS(pHTInfo->RxReorderPendingTime)); |
| 1075 | } |
| 1076 | spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); |
| 1077 | } |
| 1078 | |
| 1079 | u8 parse_subframe(struct rtllib_device* ieee,struct sk_buff *skb, |
| 1080 | struct rtllib_rx_stats *rx_stats, |
| 1081 | struct rtllib_rxb *rxb,u8* src,u8* dst) |
| 1082 | { |
| 1083 | struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr* )skb->data; |
| 1084 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1085 | |
| 1086 | u16 LLCOffset= sizeof(struct rtllib_hdr_3addr); |
| 1087 | u16 ChkLength; |
| 1088 | bool bIsAggregateFrame = false; |
| 1089 | u16 nSubframe_Length; |
| 1090 | u8 nPadding_Length = 0; |
| 1091 | u16 SeqNum=0; |
| 1092 | struct sk_buff *sub_skb; |
| 1093 | u8 *data_ptr; |
| 1094 | /* just for debug purpose */ |
| 1095 | SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl)); |
| 1096 | if ((RTLLIB_QOS_HAS_SEQ(fc))&&\ |
| 1097 | (((frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) { |
| 1098 | bIsAggregateFrame = true; |
| 1099 | } |
| 1100 | |
| 1101 | if (RTLLIB_QOS_HAS_SEQ(fc)) { |
| 1102 | LLCOffset += 2; |
| 1103 | } |
| 1104 | if (rx_stats->bContainHTC) { |
| 1105 | LLCOffset += sHTCLng; |
| 1106 | } |
| 1107 | |
| 1108 | ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/ |
| 1109 | |
| 1110 | if ( skb->len <= ChkLength ) { |
| 1111 | return 0; |
| 1112 | } |
| 1113 | |
| 1114 | skb_pull(skb, LLCOffset); |
| 1115 | ieee->bIsAggregateFrame = bIsAggregateFrame; |
| 1116 | if (!bIsAggregateFrame) { |
| 1117 | rxb->nr_subframes = 1; |
| 1118 | |
| 1119 | /* altered by clark 3/30/2010 |
| 1120 | * The buffer size of the skb indicated to upper layer |
| 1121 | * must be less than 5000, or the defraged IP datagram |
| 1122 | * in the IP layer will exceed "ipfrag_high_tresh" and be |
| 1123 | * discarded. so there must not use the function |
| 1124 | * "skb_copy" and "skb_clone" for "skb". |
| 1125 | */ |
| 1126 | |
| 1127 | /* Allocate new skb for releasing to upper layer */ |
| 1128 | sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE); |
| 1129 | skb_reserve(sub_skb, 12); |
| 1130 | data_ptr = (u8 *)skb_put(sub_skb, skb->len); |
| 1131 | memcpy(data_ptr, skb->data, skb->len); |
| 1132 | sub_skb->dev = ieee->dev; |
| 1133 | |
| 1134 | rxb->subframes[0] = sub_skb; |
| 1135 | |
| 1136 | memcpy(rxb->src,src,ETH_ALEN); |
| 1137 | memcpy(rxb->dst,dst,ETH_ALEN); |
| 1138 | rxb->subframes[0]->dev = ieee->dev; |
| 1139 | return 1; |
| 1140 | } else { |
| 1141 | rxb->nr_subframes = 0; |
| 1142 | memcpy(rxb->src,src,ETH_ALEN); |
| 1143 | memcpy(rxb->dst,dst,ETH_ALEN); |
| 1144 | while(skb->len > ETHERNET_HEADER_SIZE) { |
| 1145 | /* Offset 12 denote 2 mac address */ |
| 1146 | nSubframe_Length = *((u16*)(skb->data + 12)); |
| 1147 | nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8); |
| 1148 | |
| 1149 | if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) { |
| 1150 | printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\ |
| 1151 | __func__,rxb->nr_subframes); |
| 1152 | printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length); |
| 1153 | printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length); |
| 1154 | printk("The Packet SeqNum is %d\n",SeqNum); |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | /* move the data point to data content */ |
| 1159 | skb_pull(skb, ETHERNET_HEADER_SIZE); |
| 1160 | |
| 1161 | /* altered by clark 3/30/2010 |
| 1162 | * The buffer size of the skb indicated to upper layer |
| 1163 | * must be less than 5000, or the defraged IP datagram |
| 1164 | * in the IP layer will exceed "ipfrag_high_tresh" and be |
| 1165 | * discarded. so there must not use the function |
| 1166 | * "skb_copy" and "skb_clone" for "skb". |
| 1167 | */ |
| 1168 | |
| 1169 | /* Allocate new skb for releasing to upper layer */ |
| 1170 | sub_skb = dev_alloc_skb(nSubframe_Length + 12); |
| 1171 | skb_reserve(sub_skb, 12); |
| 1172 | data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length); |
| 1173 | memcpy(data_ptr,skb->data,nSubframe_Length); |
| 1174 | |
| 1175 | sub_skb->dev = ieee->dev; |
| 1176 | rxb->subframes[rxb->nr_subframes++] = sub_skb; |
| 1177 | if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { |
| 1178 | RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n"); |
| 1179 | break; |
| 1180 | } |
| 1181 | skb_pull(skb,nSubframe_Length); |
| 1182 | |
| 1183 | if (skb->len != 0) { |
| 1184 | nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4); |
| 1185 | if (nPadding_Length == 4) { |
| 1186 | nPadding_Length = 0; |
| 1187 | } |
| 1188 | |
| 1189 | if (skb->len < nPadding_Length) { |
| 1190 | return 0; |
| 1191 | } |
| 1192 | |
| 1193 | skb_pull(skb,nPadding_Length); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | return rxb->nr_subframes; |
| 1198 | } |
| 1199 | } |
| 1200 | |
| 1201 | |
| 1202 | size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1203 | struct rtllib_rx_stats *rx_stats) |
| 1204 | { |
| 1205 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1206 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1207 | size_t hdrlen = 0; |
| 1208 | |
| 1209 | hdrlen = rtllib_get_hdrlen(fc); |
| 1210 | if (HTCCheck(ieee, skb->data)) { |
| 1211 | if (net_ratelimit()) |
| 1212 | printk("%s: find HTCControl!\n", __func__); |
| 1213 | hdrlen += 4; |
| 1214 | rx_stats->bContainHTC = 1; |
| 1215 | } |
| 1216 | |
| 1217 | if (RTLLIB_QOS_HAS_SEQ(fc)) |
| 1218 | rx_stats->bIsQosData = 1; |
| 1219 | |
| 1220 | return hdrlen; |
| 1221 | } |
| 1222 | |
| 1223 | int rtllib_rx_check_duplicate(struct rtllib_device *ieee, struct sk_buff *skb, u8 multicast) |
| 1224 | { |
| 1225 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1226 | u16 fc, sc; |
| 1227 | u8 frag, type, stype; |
| 1228 | |
| 1229 | fc = le16_to_cpu(hdr->frame_ctl); |
| 1230 | type = WLAN_FC_GET_TYPE(fc); |
| 1231 | stype = WLAN_FC_GET_STYPE(fc); |
| 1232 | sc = le16_to_cpu(hdr->seq_ctl); |
| 1233 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 1234 | |
| 1235 | if ( (ieee->pHTInfo->bCurRxReorderEnable == false) || |
| 1236 | !ieee->current_network.qos_data.active || |
| 1237 | !IsDataFrame(skb->data) || |
| 1238 | IsLegacyDataFrame(skb->data)) { |
| 1239 | if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))){ |
| 1240 | if (is_duplicate_packet(ieee, hdr)){ |
| 1241 | return -1; |
| 1242 | } |
| 1243 | } |
| 1244 | } else { |
| 1245 | PRX_TS_RECORD pRxTS = NULL; |
| 1246 | if (GetTs(ieee, (PTS_COMMON_INFO*) &pRxTS, hdr->addr2, |
| 1247 | (u8)Frame_QoSTID((u8*)(skb->data)), RX_DIR, true)) { |
| 1248 | if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) && |
| 1249 | (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) { |
| 1250 | return -1; |
| 1251 | } else { |
| 1252 | pRxTS->RxLastFragNum = frag; |
| 1253 | pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc); |
| 1254 | } |
| 1255 | } else { |
| 1256 | RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n",__func__); |
| 1257 | return -1; |
| 1258 | } |
| 1259 | } |
| 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | void rtllib_rx_extract_addr(struct rtllib_device *ieee, struct rtllib_hdr_4addr *hdr, u8 *dst, u8 *src, u8 *bssid) |
| 1264 | { |
| 1265 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1266 | |
| 1267 | switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) { |
| 1268 | case RTLLIB_FCTL_FROMDS: |
| 1269 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 1270 | memcpy(src, hdr->addr3, ETH_ALEN); |
| 1271 | memcpy(bssid, hdr->addr2, ETH_ALEN); |
| 1272 | break; |
| 1273 | case RTLLIB_FCTL_TODS: |
| 1274 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 1275 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 1276 | memcpy(bssid, hdr->addr1, ETH_ALEN); |
| 1277 | break; |
| 1278 | case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS: |
| 1279 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 1280 | memcpy(src, hdr->addr4, ETH_ALEN); |
| 1281 | memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); |
| 1282 | break; |
| 1283 | case 0: |
| 1284 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 1285 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 1286 | memcpy(bssid, hdr->addr3, ETH_ALEN); |
| 1287 | break; |
| 1288 | } |
| 1289 | } |
| 1290 | int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, u8 *dst, u8 *src, u8 *bssid, u8 *addr2) |
| 1291 | { |
| 1292 | u8 zero_addr[ETH_ALEN] = {0}; |
| 1293 | u8 type, stype; |
| 1294 | |
| 1295 | type = WLAN_FC_GET_TYPE(fc); |
| 1296 | stype = WLAN_FC_GET_STYPE(fc); |
| 1297 | |
| 1298 | /* Filter frames from different BSS */ |
| 1299 | if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) |
| 1300 | && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0) |
| 1301 | && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) { |
| 1302 | return -1; |
| 1303 | } |
| 1304 | |
| 1305 | /* Filter packets sent by an STA that will be forwarded by AP */ |
| 1306 | if ( ieee->IntelPromiscuousModeInfo.bPromiscuousOn && |
| 1307 | ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame ) { |
| 1308 | if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) && |
| 1309 | (compare_ether_addr(dst, ieee->current_network.bssid) != 0) && |
| 1310 | (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) { |
| 1311 | return -1; |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | /* Nullfunc frames may have PS-bit set, so they must be passed to |
| 1316 | * hostap_handle_sta_rx() before being dropped here. */ |
| 1317 | if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn){ |
| 1318 | if (stype != RTLLIB_STYPE_DATA && |
| 1319 | stype != RTLLIB_STYPE_DATA_CFACK && |
| 1320 | stype != RTLLIB_STYPE_DATA_CFPOLL && |
| 1321 | stype != RTLLIB_STYPE_DATA_CFACKPOLL&& |
| 1322 | stype != RTLLIB_STYPE_QOS_DATA |
| 1323 | ) { |
| 1324 | if (stype != RTLLIB_STYPE_NULLFUNC) |
| 1325 | RTLLIB_DEBUG_DROP( |
| 1326 | "RX: dropped data frame " |
| 1327 | "with no data (type=0x%02x, " |
| 1328 | "subtype=0x%02x)\n", |
| 1329 | type, stype); |
| 1330 | return -1; |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | if (ieee->iw_mode != IW_MODE_MESH) { |
| 1335 | /* packets from our adapter are dropped (echo) */ |
| 1336 | if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN)) |
| 1337 | return -1; |
| 1338 | |
| 1339 | /* {broad,multi}cast packets to our BSS go through */ |
| 1340 | if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) { |
| 1341 | if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) { |
| 1342 | return -1; |
| 1343 | } |
| 1344 | } |
| 1345 | } |
| 1346 | return 0; |
| 1347 | } |
| 1348 | int rtllib_rx_get_crypt( |
| 1349 | struct rtllib_device *ieee, |
| 1350 | struct sk_buff *skb, |
| 1351 | struct rtllib_crypt_data **crypt, |
| 1352 | size_t hdrlen) |
| 1353 | { |
| 1354 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1355 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1356 | int idx = 0; |
| 1357 | |
| 1358 | if (ieee->host_decrypt) { |
| 1359 | if (skb->len >= hdrlen + 3) |
| 1360 | idx = skb->data[hdrlen + 3] >> 6; |
| 1361 | |
| 1362 | *crypt = ieee->crypt[idx]; |
| 1363 | /* allow NULL decrypt to indicate an station specific override |
| 1364 | * for default encryption */ |
| 1365 | if (*crypt && ((*crypt)->ops == NULL || |
| 1366 | (*crypt)->ops->decrypt_mpdu == NULL)) |
| 1367 | *crypt = NULL; |
| 1368 | |
| 1369 | if (!*crypt && (fc & RTLLIB_FCTL_WEP)) { |
| 1370 | /* This seems to be triggered by some (multicast?) |
| 1371 | * frames from other than current BSS, so just drop the |
| 1372 | * frames silently instead of filling system log with |
| 1373 | * these reports. */ |
| 1374 | RTLLIB_DEBUG_DROP("Decryption failed (not set)" |
| 1375 | " (SA=" MAC_FMT ")\n", |
| 1376 | MAC_ARG(hdr->addr2)); |
| 1377 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 1378 | return -1; |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | return 0; |
| 1383 | } |
| 1384 | int rtllib_rx_decrypt( |
| 1385 | struct rtllib_device *ieee, |
| 1386 | struct sk_buff *skb, |
| 1387 | struct rtllib_rx_stats *rx_stats, |
| 1388 | struct rtllib_crypt_data *crypt, |
| 1389 | size_t hdrlen) |
| 1390 | { |
| 1391 | struct rtllib_hdr_4addr *hdr; |
| 1392 | int keyidx = 0; |
| 1393 | u16 fc, sc; |
| 1394 | u8 frag; |
| 1395 | |
| 1396 | hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1397 | fc = le16_to_cpu(hdr->frame_ctl); |
| 1398 | sc = le16_to_cpu(hdr->seq_ctl); |
| 1399 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 1400 | |
| 1401 | if ((!rx_stats->Decrypted)){ |
| 1402 | ieee->need_sw_enc = 1; |
| 1403 | }else{ |
| 1404 | ieee->need_sw_enc = 0; |
| 1405 | } |
| 1406 | |
| 1407 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && |
| 1408 | ((keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt)) < 0)) { |
| 1409 | printk("%s: decrypt frame error\n", __func__); |
| 1410 | return -1; |
| 1411 | } |
| 1412 | |
| 1413 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 1414 | if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) { |
| 1415 | int flen; |
| 1416 | struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); |
| 1417 | RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); |
| 1418 | |
| 1419 | if (!frag_skb) { |
| 1420 | RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG, |
| 1421 | "Rx cannot get skb from fragment " |
| 1422 | "cache (morefrag=%d seq=%u frag=%u)\n", |
| 1423 | (fc & RTLLIB_FCTL_MOREFRAGS) != 0, |
| 1424 | WLAN_GET_SEQ_SEQ(sc), frag); |
| 1425 | return -1; |
| 1426 | } |
| 1427 | flen = skb->len; |
| 1428 | if (frag != 0) |
| 1429 | flen -= hdrlen; |
| 1430 | |
| 1431 | if (frag_skb->tail + flen > frag_skb->end) { |
| 1432 | printk(KERN_WARNING "%s: host decrypted and " |
| 1433 | "reassembled frame did not fit skb\n", |
| 1434 | __func__); |
| 1435 | rtllib_frag_cache_invalidate(ieee, hdr); |
| 1436 | return -1; |
| 1437 | } |
| 1438 | |
| 1439 | if (frag == 0) { |
| 1440 | /* copy first fragment (including full headers) into |
| 1441 | * beginning of the fragment cache skb */ |
| 1442 | memcpy(skb_put(frag_skb, flen), skb->data, flen); |
| 1443 | } else { |
| 1444 | /* append frame payload to the end of the fragment |
| 1445 | * cache skb */ |
| 1446 | memcpy(skb_put(frag_skb, flen), skb->data + hdrlen, |
| 1447 | flen); |
| 1448 | } |
| 1449 | dev_kfree_skb_any(skb); |
| 1450 | skb = NULL; |
| 1451 | |
| 1452 | if (fc & RTLLIB_FCTL_MOREFRAGS) { |
| 1453 | /* more fragments expected - leave the skb in fragment |
| 1454 | * cache for now; it will be delivered to upper layers |
| 1455 | * after all fragments have been received */ |
| 1456 | return -2; |
| 1457 | } |
| 1458 | |
| 1459 | /* this was the last fragment and the frame will be |
| 1460 | * delivered, so remove skb from fragment cache */ |
| 1461 | skb = frag_skb; |
| 1462 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 1463 | rtllib_frag_cache_invalidate(ieee, hdr); |
| 1464 | } |
| 1465 | |
| 1466 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still |
| 1467 | * encrypted/authenticated */ |
| 1468 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && |
| 1469 | rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) |
| 1470 | { |
| 1471 | printk("%s: ==>decrypt msdu error\n", __func__); |
| 1472 | return -1; |
| 1473 | } |
| 1474 | |
| 1475 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 1476 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) { |
| 1477 | if (/*ieee->ieee802_1x &&*/ |
| 1478 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 1479 | |
| 1480 | #ifdef CONFIG_RTLLIB_DEBUG |
| 1481 | /* pass unencrypted EAPOL frames even if encryption is |
| 1482 | * configured */ |
| 1483 | struct eapol *eap = (struct eapol *)(skb->data + |
| 1484 | 24); |
| 1485 | RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 1486 | eap_get_type(eap->type)); |
| 1487 | #endif |
| 1488 | } else { |
| 1489 | RTLLIB_DEBUG_DROP( |
| 1490 | "encryption configured, but RX " |
| 1491 | "frame not encrypted (SA=" MAC_FMT ")\n", |
| 1492 | MAC_ARG(hdr->addr2)); |
| 1493 | return -1; |
| 1494 | } |
| 1495 | } |
| 1496 | |
| 1497 | #ifdef CONFIG_RTLLIB_DEBUG |
| 1498 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && |
| 1499 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 1500 | struct eapol *eap = (struct eapol *)(skb->data + |
| 1501 | 24); |
| 1502 | RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 1503 | eap_get_type(eap->type)); |
| 1504 | } |
| 1505 | #endif |
| 1506 | |
| 1507 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep && |
| 1508 | !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 1509 | RTLLIB_DEBUG_DROP( |
| 1510 | "dropped unencrypted RX data " |
| 1511 | "frame from " MAC_FMT |
| 1512 | " (drop_unencrypted=1)\n", |
| 1513 | MAC_ARG(hdr->addr2)); |
| 1514 | return -1; |
| 1515 | } |
| 1516 | |
| 1517 | if (rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 1518 | printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n"); |
| 1519 | } |
| 1520 | |
| 1521 | return 0; |
| 1522 | } |
| 1523 | void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes) |
| 1524 | { |
| 1525 | #if !defined(RTL8192SU) && !defined(RTL8192U) |
| 1526 | if (unicast){ |
| 1527 | |
| 1528 | if ((ieee->state == RTLLIB_LINKED) /*&& !MgntInitAdapterInProgress(pMgntInfo)*/) |
| 1529 | { |
| 1530 | if ( ((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +ieee->LinkDetectInfo.NumTxOkInPeriod) > 8 ) || |
| 1531 | (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2) ) |
| 1532 | { |
| 1533 | if (ieee->LeisurePSLeave) |
| 1534 | ieee->LeisurePSLeave(ieee->dev); |
| 1535 | } |
| 1536 | } |
| 1537 | } |
| 1538 | #endif |
| 1539 | ieee->last_rx_ps_time = jiffies; |
| 1540 | } |
| 1541 | void rtllib_rx_indicate_pkt_legacy( |
| 1542 | struct rtllib_device *ieee, |
| 1543 | struct rtllib_rx_stats *rx_stats, |
| 1544 | struct rtllib_rxb* rxb, |
| 1545 | u8 *dst, |
| 1546 | u8 *src) |
| 1547 | { |
| 1548 | struct net_device *dev = ieee->dev; |
| 1549 | u16 ethertype; |
| 1550 | int i = 0; |
| 1551 | |
| 1552 | if (rxb == NULL){ |
| 1553 | printk("%s: rxb is NULL!!\n", __func__); |
| 1554 | return ; |
| 1555 | } |
| 1556 | |
| 1557 | for (i = 0; i<rxb->nr_subframes; i++) { |
| 1558 | struct sk_buff *sub_skb = rxb->subframes[i]; |
| 1559 | |
| 1560 | if (sub_skb) { |
| 1561 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 1562 | ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; |
| 1563 | if (sub_skb->len >= 8 && |
| 1564 | ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && |
| 1565 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 1566 | memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 1567 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 1568 | * replace EtherType */ |
| 1569 | skb_pull(sub_skb, SNAP_SIZE); |
| 1570 | memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); |
| 1571 | memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); |
| 1572 | } else { |
| 1573 | u16 len; |
| 1574 | /* Leave Ethernet header part of hdr and full payload */ |
| 1575 | len = htons(sub_skb->len); |
| 1576 | memcpy(skb_push(sub_skb, 2), &len, 2); |
| 1577 | memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); |
| 1578 | memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); |
| 1579 | } |
| 1580 | |
| 1581 | ieee->stats.rx_packets++; |
| 1582 | ieee->stats.rx_bytes += sub_skb->len; |
| 1583 | |
| 1584 | if (is_multicast_ether_addr(dst)) { |
| 1585 | ieee->stats.multicast++; |
| 1586 | } |
| 1587 | |
| 1588 | /* Indicat the packets to upper layer */ |
| 1589 | memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); |
| 1590 | sub_skb->protocol = eth_type_trans(sub_skb, dev); |
| 1591 | sub_skb->dev = dev; |
| 1592 | sub_skb->dev->stats.rx_packets++; |
| 1593 | sub_skb->dev->stats.rx_bytes += sub_skb->len; |
| 1594 | #ifdef TCP_CSUM_OFFLOAD_RX |
| 1595 | if ( rx_stats->tcp_csum_valid) |
| 1596 | sub_skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1597 | else |
| 1598 | sub_skb->ip_summed = CHECKSUM_NONE; |
| 1599 | #else |
| 1600 | sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
| 1601 | #endif |
| 1602 | netif_rx(sub_skb); |
| 1603 | } |
| 1604 | } |
| 1605 | kfree(rxb); |
| 1606 | rxb = NULL; |
| 1607 | } |
| 1608 | int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1609 | struct rtllib_rx_stats *rx_stats) |
| 1610 | { |
| 1611 | struct net_device *dev = ieee->dev; |
| 1612 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1613 | struct rtllib_crypt_data *crypt = NULL; |
| 1614 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 1615 | struct sta_info * psta = NULL; |
| 1616 | #endif |
| 1617 | struct rtllib_rxb* rxb = NULL; |
| 1618 | PRX_TS_RECORD pTS = NULL; |
| 1619 | u16 fc, sc, SeqNum = 0; |
| 1620 | u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0; |
| 1621 | u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload; |
| 1622 | size_t hdrlen = 0; |
| 1623 | bool bToOtherSTA = false; |
| 1624 | int ret = 0, i = 0; |
| 1625 | |
| 1626 | hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1627 | fc = le16_to_cpu(hdr->frame_ctl); |
| 1628 | type = WLAN_FC_GET_TYPE(fc); |
| 1629 | stype = WLAN_FC_GET_STYPE(fc); |
| 1630 | sc = le16_to_cpu(hdr->seq_ctl); |
| 1631 | |
| 1632 | /*Filter pkt not to me*/ |
| 1633 | multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1); |
| 1634 | unicast = !multicast; |
| 1635 | if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) { |
| 1636 | if (ieee->bNetPromiscuousMode) |
| 1637 | bToOtherSTA = true; |
| 1638 | else |
| 1639 | goto rx_dropped; |
| 1640 | } |
| 1641 | |
| 1642 | /*Filter pkt has too small length */ |
| 1643 | hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats); |
| 1644 | if (skb->len < hdrlen){ |
| 1645 | printk("%s():ERR!!! skb->len is smaller than hdrlen\n",__func__); |
| 1646 | goto rx_dropped; |
| 1647 | } |
| 1648 | |
| 1649 | /* Filter Duplicate pkt */ |
| 1650 | ret = rtllib_rx_check_duplicate(ieee, skb, multicast); |
| 1651 | if (ret < 0) |
| 1652 | goto rx_dropped; |
| 1653 | |
| 1654 | /* Filter CTRL Frame */ |
| 1655 | if (type == RTLLIB_FTYPE_CTL) { |
| 1656 | goto rx_dropped; |
| 1657 | } |
| 1658 | |
| 1659 | /* Filter MGNT Frame */ |
| 1660 | if (type == RTLLIB_FTYPE_MGMT) { |
| 1661 | if (bToOtherSTA) |
| 1662 | goto rx_dropped; |
| 1663 | if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) |
| 1664 | goto rx_dropped; |
| 1665 | else |
| 1666 | goto rx_exit; |
| 1667 | } |
| 1668 | |
| 1669 | /* Filter WAPI DATA Frame */ |
| 1670 | |
| 1671 | /* Update statstics for AP roaming */ |
| 1672 | if (!bToOtherSTA){ |
| 1673 | ieee->LinkDetectInfo.NumRecvDataInPeriod++; |
| 1674 | ieee->LinkDetectInfo.NumRxOkInPeriod++; |
| 1675 | } |
| 1676 | dev->last_rx = jiffies; |
| 1677 | |
| 1678 | /* Data frame - extract src/dst addresses */ |
| 1679 | rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); |
| 1680 | |
| 1681 | /* Filter Data frames */ |
| 1682 | ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2); |
| 1683 | if (ret < 0) |
| 1684 | goto rx_dropped; |
| 1685 | |
| 1686 | if (skb->len == hdrlen){ |
| 1687 | goto rx_dropped; |
| 1688 | } |
| 1689 | |
| 1690 | /* Send pspoll based on moredata */ |
| 1691 | if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP) |
| 1692 | && (ieee->polling) && (!bToOtherSTA)) { |
| 1693 | if (WLAN_FC_MORE_DATA(fc)) { |
| 1694 | /* more data bit is set, let's request a new frame from the AP */ |
| 1695 | rtllib_sta_ps_send_pspoll_frame(ieee); |
| 1696 | } else { |
| 1697 | ieee->polling = false; |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 1702 | if (ieee->iw_mode == IW_MODE_ADHOC){ |
| 1703 | psta = GetStaInfo(ieee, src); |
| 1704 | if (NULL != psta) |
| 1705 | psta->LastActiveTime = jiffies; |
| 1706 | } |
| 1707 | #endif |
| 1708 | |
| 1709 | /* Get crypt if encrypted */ |
| 1710 | ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen); |
| 1711 | if (ret == -1) |
| 1712 | goto rx_dropped; |
| 1713 | |
| 1714 | /* Decrypt data frame (including reassemble) */ |
| 1715 | ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen); |
| 1716 | if (ret == -1) |
| 1717 | goto rx_dropped; |
| 1718 | else if (ret == -2) |
| 1719 | goto rx_exit; |
| 1720 | |
| 1721 | /* Get TS for Rx Reorder */ |
| 1722 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 1723 | if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) |
| 1724 | && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1) |
| 1725 | && (!bToOtherSTA)) |
| 1726 | { |
| 1727 | TID = Frame_QoSTID(skb->data); |
| 1728 | SeqNum = WLAN_GET_SEQ_SEQ(sc); |
| 1729 | GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true); |
| 1730 | if (TID !=0 && TID !=3){ |
| 1731 | ieee->bis_any_nonbepkts = true; |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | /* Parse rx data frame (For AMSDU) */ |
| 1736 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
| 1737 | payload = skb->data + hdrlen; |
| 1738 | rxb = (struct rtllib_rxb*)kmalloc(sizeof(struct rtllib_rxb),GFP_ATOMIC); |
| 1739 | if (rxb == NULL) |
| 1740 | { |
| 1741 | RTLLIB_DEBUG(RTLLIB_DL_ERR,"%s(): kmalloc rxb error\n",__func__); |
| 1742 | goto rx_dropped; |
| 1743 | } |
| 1744 | /* to parse amsdu packets */ |
| 1745 | /* qos data packets & reserved bit is 1 */ |
| 1746 | if (parse_subframe(ieee,skb,rx_stats,rxb,src,dst) == 0) { |
| 1747 | /* only to free rxb, and not submit the packets to upper layer */ |
| 1748 | for (i =0; i < rxb->nr_subframes; i++) { |
| 1749 | dev_kfree_skb(rxb->subframes[i]); |
| 1750 | } |
| 1751 | kfree(rxb); |
| 1752 | rxb = NULL; |
| 1753 | goto rx_dropped; |
| 1754 | } |
| 1755 | |
| 1756 | /* Update WAPI PN */ |
| 1757 | |
| 1758 | /* Check if leave LPS */ |
| 1759 | if (!bToOtherSTA){ |
| 1760 | if (ieee->bIsAggregateFrame) |
| 1761 | nr_subframes = rxb->nr_subframes; |
| 1762 | else |
| 1763 | nr_subframes = 1; |
| 1764 | if (unicast) |
| 1765 | ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes; |
| 1766 | rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes); |
| 1767 | } |
| 1768 | |
| 1769 | /* Indicate packets to upper layer or Rx Reorder */ |
| 1770 | if (ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL || bToOtherSTA){ |
| 1771 | rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src); |
| 1772 | }else{ |
| 1773 | #ifdef TCP_CSUM_OFFLOAD_RX |
| 1774 | rxb->tcp_csum_valid = rx_stats->tcp_csum_valid; |
| 1775 | #endif |
| 1776 | RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); |
| 1777 | } |
| 1778 | |
| 1779 | dev_kfree_skb(skb); |
| 1780 | |
| 1781 | rx_exit: |
| 1782 | return 1; |
| 1783 | |
| 1784 | rx_dropped: |
| 1785 | if (rxb != NULL) |
| 1786 | { |
| 1787 | kfree(rxb); |
| 1788 | rxb = NULL; |
| 1789 | } |
| 1790 | ieee->stats.rx_dropped++; |
| 1791 | |
| 1792 | /* Returning 0 indicates to caller that we have not handled the SKB-- |
| 1793 | * so it is still allocated and can be used again by underlying |
| 1794 | * hardware as a DMA target */ |
| 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1799 | struct rtllib_rx_stats *rx_stats) |
| 1800 | { |
| 1801 | return 0; |
| 1802 | } |
| 1803 | int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1804 | struct rtllib_rx_stats *rx_stats) |
| 1805 | { |
| 1806 | struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1807 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1808 | size_t hdrlen = rtllib_get_hdrlen(fc); |
| 1809 | |
| 1810 | if (skb->len < hdrlen){ |
| 1811 | printk("%s():ERR!!! skb->len is smaller than hdrlen\n", __func__); |
| 1812 | return 0; |
| 1813 | } |
| 1814 | |
| 1815 | if (HTCCheck(ieee, skb->data)) { |
| 1816 | if (net_ratelimit()) |
| 1817 | printk("%s: Find HTCControl!\n", __func__); |
| 1818 | hdrlen += 4; |
| 1819 | } |
| 1820 | |
| 1821 | #if WIRELESS_EXT > 15 |
| 1822 | rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen); |
| 1823 | ieee->stats.rx_packets++; |
| 1824 | ieee->stats.rx_bytes += skb->len; |
| 1825 | #endif |
| 1826 | return 1; |
| 1827 | } |
| 1828 | |
| 1829 | int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1830 | struct rtllib_rx_stats *rx_stats) |
| 1831 | { |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 1835 | #if 1 |
| 1836 | /* All received frames are sent to this function. @skb contains the frame in |
| 1837 | * IEEE 802.11 format, i.e., in the format it was sent over air. |
| 1838 | * This function is called only as a tasklet (software IRQ). */ |
| 1839 | int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1840 | struct rtllib_rx_stats *rx_stats) |
| 1841 | { |
| 1842 | int ret = 0; |
| 1843 | |
| 1844 | if ((NULL==ieee) || (NULL==skb) || (NULL==rx_stats)){ |
| 1845 | printk(KERN_INFO "%s: Input parameters NULL!\n", __func__); |
| 1846 | goto rx_dropped; |
| 1847 | } |
| 1848 | if (skb->len < 10) { |
| 1849 | printk(KERN_INFO "%s: SKB length < 10 \n", __func__); |
| 1850 | goto rx_dropped; |
| 1851 | } |
| 1852 | |
| 1853 | switch (ieee->iw_mode) { |
| 1854 | case IW_MODE_ADHOC: |
| 1855 | case IW_MODE_INFRA: |
| 1856 | ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats); |
| 1857 | break; |
| 1858 | case IW_MODE_MASTER: |
| 1859 | case IW_MODE_REPEAT: |
| 1860 | ret = rtllib_rx_Master(ieee, skb, rx_stats); |
| 1861 | break; |
| 1862 | case IW_MODE_MONITOR: |
| 1863 | ret = rtllib_rx_Monitor(ieee, skb, rx_stats); |
| 1864 | break; |
| 1865 | case IW_MODE_MESH: |
| 1866 | ret = rtllib_rx_Mesh(ieee, skb, rx_stats); |
| 1867 | break; |
| 1868 | default: |
| 1869 | printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__); |
| 1870 | break; |
| 1871 | } |
| 1872 | |
| 1873 | return ret; |
| 1874 | |
| 1875 | rx_dropped: |
| 1876 | ieee->stats.rx_dropped++; |
| 1877 | return 0; |
| 1878 | } |
| 1879 | #else |
| 1880 | int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, |
| 1881 | struct rtllib_rx_stats *rx_stats) |
| 1882 | { |
| 1883 | struct net_device *dev = ieee->dev; |
| 1884 | struct rtllib_hdr_4addr *hdr; |
| 1885 | size_t hdrlen; |
| 1886 | u16 fc, type, stype, sc; |
| 1887 | struct net_device_stats *stats = NULL; |
| 1888 | unsigned int frag; |
| 1889 | u8 *payload; |
| 1890 | u16 ethertype; |
| 1891 | u8 TID = 0; |
| 1892 | u16 SeqNum = 0; |
| 1893 | PRX_TS_RECORD pTS = NULL; |
| 1894 | #ifdef NOT_YET |
| 1895 | struct net_device *wds = NULL; |
| 1896 | struct sk_buff *skb2 = NULL; |
| 1897 | struct net_device *wds = NULL; |
| 1898 | int frame_authorized = 0; |
| 1899 | int from_assoc_ap = 0; |
| 1900 | void *sta = NULL; |
| 1901 | #endif |
| 1902 | u8 dst[ETH_ALEN]; |
| 1903 | u8 src[ETH_ALEN]; |
| 1904 | u8 bssid[ETH_ALEN] = {0}; |
| 1905 | u8 zero_addr[ETH_ALEN] = {0}; |
| 1906 | struct rtllib_crypt_data *crypt = NULL; |
| 1907 | int keyidx = 0; |
| 1908 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 1909 | struct sta_info * psta = NULL; |
| 1910 | #endif |
| 1911 | bool unicast_packet = false; |
| 1912 | int i; |
| 1913 | struct rtllib_rxb* rxb = NULL; |
| 1914 | int multicast = 0; |
| 1915 | bool tmp_dump = false; |
| 1916 | bool bToOtherSTA = false; |
| 1917 | hdr = (struct rtllib_hdr_4addr *)skb->data; |
| 1918 | stats = &ieee->stats; |
| 1919 | |
| 1920 | multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1); |
| 1921 | if (!multicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) { |
| 1922 | if ((ieee->iw_mode == IW_MODE_MONITOR) || ieee->bNetPromiscuousMode){ |
| 1923 | bToOtherSTA = true; |
| 1924 | }else{ |
| 1925 | goto rx_dropped; |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | fc = le16_to_cpu(hdr->frame_ctl); |
| 1930 | type = WLAN_FC_GET_TYPE(fc); |
| 1931 | stype = WLAN_FC_GET_STYPE(fc); |
| 1932 | sc = le16_to_cpu(hdr->seq_ctl); |
| 1933 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 1934 | |
| 1935 | ieee->need_sw_enc = 0; |
| 1936 | |
| 1937 | hdrlen = rtllib_get_hdrlen(fc); |
| 1938 | if (skb->len < hdrlen){ |
| 1939 | printk("%s():ERR!!! skb->len is smaller than hdrlen\n",__func__); |
| 1940 | goto rx_dropped; |
| 1941 | } |
| 1942 | |
| 1943 | if (HTCCheck(ieee, skb->data)) { |
| 1944 | if (net_ratelimit()) |
| 1945 | printk("find HTCControl\n"); |
| 1946 | hdrlen += 4; |
| 1947 | rx_stats->bContainHTC = 1; |
| 1948 | } |
| 1949 | if (RTLLIB_QOS_HAS_SEQ(fc)) |
| 1950 | rx_stats->bIsQosData = 1; |
| 1951 | if ((0) && (type == RTLLIB_FTYPE_DATA) && ((is_broadcast_ether_addr(hdr->addr1)) || (compare_ether_addr(dev->dev_addr, hdr->addr1) == 0))) { |
| 1952 | printk("===>RX data before decrypt\n"); |
| 1953 | tmp_dump = true; |
| 1954 | dump_buf(skb->data,skb->len); |
| 1955 | } |
| 1956 | #ifdef NOT_YET |
| 1957 | hostap_update_rx_stats(local->ap, hdr, rx_stats); |
| 1958 | #endif |
| 1959 | |
| 1960 | if (ieee->host_decrypt) { |
| 1961 | int idx = 0; |
| 1962 | if (skb->len >= hdrlen + 3) |
| 1963 | idx = skb->data[hdrlen + 3] >> 6; |
| 1964 | crypt = ieee->crypt[idx]; |
| 1965 | #ifdef NOT_YET |
| 1966 | sta = NULL; |
| 1967 | |
| 1968 | /* Use station specific key to override default keys if the |
| 1969 | * receiver address is a unicast address ("individual RA"). If |
| 1970 | * bcrx_sta_key parameter is set, station specific key is used |
| 1971 | * even with broad/multicast targets (this is against IEEE |
| 1972 | * 802.11, but makes it easier to use different keys with |
| 1973 | * stations that do not support WEP key mapping). */ |
| 1974 | |
| 1975 | if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) |
| 1976 | (void) hostap_handle_sta_crypto(local, hdr, &crypt, |
| 1977 | &sta); |
| 1978 | #endif |
| 1979 | |
| 1980 | /* allow NULL decrypt to indicate an station specific override |
| 1981 | * for default encryption */ |
| 1982 | if (crypt && (crypt->ops == NULL || |
| 1983 | crypt->ops->decrypt_mpdu == NULL)) |
| 1984 | crypt = NULL; |
| 1985 | |
| 1986 | if (!crypt && (fc & RTLLIB_FCTL_WEP)) { |
| 1987 | /* This seems to be triggered by some (multicast?) |
| 1988 | * frames from other than current BSS, so just drop the |
| 1989 | * frames silently instead of filling system log with |
| 1990 | * these reports. */ |
| 1991 | RTLLIB_DEBUG_DROP("Decryption failed (not set)" |
| 1992 | " (SA=" MAC_FMT ")\n", |
| 1993 | MAC_ARG(hdr->addr2)); |
| 1994 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 1995 | goto rx_dropped; |
| 1996 | } |
| 1997 | } |
| 1998 | |
| 1999 | if (skb->len < RTLLIB_DATA_HDR3_LEN) |
| 2000 | goto rx_dropped; |
| 2001 | |
| 2002 | if ( (ieee->pHTInfo->bCurRxReorderEnable == false) || |
| 2003 | !ieee->current_network.qos_data.active || |
| 2004 | !IsDataFrame(skb->data) || |
| 2005 | IsLegacyDataFrame(skb->data)) { |
| 2006 | if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))){ |
| 2007 | if (is_duplicate_packet(ieee, hdr)){ |
| 2008 | goto rx_dropped; |
| 2009 | } |
| 2010 | } |
| 2011 | } else { |
| 2012 | PRX_TS_RECORD pRxTS = NULL; |
| 2013 | if (GetTs(ieee, (PTS_COMMON_INFO*) &pRxTS, hdr->addr2, |
| 2014 | (u8)Frame_QoSTID((u8*)(skb->data)), RX_DIR, true)) { |
| 2015 | if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) && |
| 2016 | (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) { |
| 2017 | goto rx_dropped; |
| 2018 | } else { |
| 2019 | pRxTS->RxLastFragNum = frag; |
| 2020 | pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc); |
| 2021 | } |
| 2022 | } else { |
| 2023 | RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n",__func__); |
| 2024 | goto rx_dropped; |
| 2025 | } |
| 2026 | } |
| 2027 | if (type == RTLLIB_FTYPE_MGMT) { |
| 2028 | if (bToOtherSTA) |
| 2029 | goto rx_dropped; |
| 2030 | if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) |
| 2031 | goto rx_dropped; |
| 2032 | else |
| 2033 | goto rx_exit; |
| 2034 | } |
| 2035 | if (type == RTLLIB_FTYPE_CTL) { |
| 2036 | goto rx_dropped; |
| 2037 | } |
| 2038 | /* Data frame - extract src/dst addresses */ |
| 2039 | switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) { |
| 2040 | case RTLLIB_FCTL_FROMDS: |
| 2041 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 2042 | memcpy(src, hdr->addr3, ETH_ALEN); |
| 2043 | memcpy(bssid, hdr->addr2, ETH_ALEN); |
| 2044 | break; |
| 2045 | case RTLLIB_FCTL_TODS: |
| 2046 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 2047 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 2048 | memcpy(bssid, hdr->addr1, ETH_ALEN); |
| 2049 | break; |
| 2050 | case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS: |
| 2051 | if (skb->len < RTLLIB_DATA_HDR4_LEN) |
| 2052 | goto rx_dropped; |
| 2053 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 2054 | memcpy(src, hdr->addr4, ETH_ALEN); |
| 2055 | memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); |
| 2056 | break; |
| 2057 | case 0: |
| 2058 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 2059 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 2060 | memcpy(bssid, hdr->addr3, ETH_ALEN); |
| 2061 | break; |
| 2062 | } |
| 2063 | |
| 2064 | /* Filter frames from different BSS */ |
| 2065 | if ((type != RTLLIB_FTYPE_CTL) && ((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) |
| 2066 | && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0) && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) { |
| 2067 | goto rx_dropped; |
| 2068 | } |
| 2069 | |
| 2070 | /* Filter packets sent by an STA that will be forwarded by AP */ |
| 2071 | if ( ieee->IntelPromiscuousModeInfo.bPromiscuousOn && |
| 2072 | ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame ) { |
| 2073 | if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) && |
| 2074 | (compare_ether_addr(dst, ieee->current_network.bssid) != 0) && |
| 2075 | (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) { |
| 2076 | goto rx_dropped; |
| 2077 | } |
| 2078 | } |
| 2079 | |
| 2080 | #ifdef NOT_YET |
| 2081 | if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) |
| 2082 | goto rx_dropped; |
| 2083 | if (wds) { |
| 2084 | skb->dev = dev = wds; |
| 2085 | stats = hostap_get_stats(dev); |
| 2086 | } |
| 2087 | |
| 2088 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && |
| 2089 | (fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) == RTLLIB_FCTL_FROMDS && |
| 2090 | ieee->stadev && |
| 2091 | memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { |
| 2092 | /* Frame from BSSID of the AP for which we are a client */ |
| 2093 | skb->dev = dev = ieee->stadev; |
| 2094 | stats = hostap_get_stats(dev); |
| 2095 | from_assoc_ap = 1; |
| 2096 | } |
| 2097 | #endif |
| 2098 | |
| 2099 | dev->last_rx = jiffies; |
| 2100 | |
| 2101 | #ifdef NOT_YET |
| 2102 | if ((ieee->iw_mode == IW_MODE_MASTER || |
| 2103 | ieee->iw_mode == IW_MODE_REPEAT) && |
| 2104 | !from_assoc_ap) { |
| 2105 | switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, |
| 2106 | wds != NULL)) { |
| 2107 | case AP_RX_CONTINUE_NOT_AUTHORIZED: |
| 2108 | frame_authorized = 0; |
| 2109 | break; |
| 2110 | case AP_RX_CONTINUE: |
| 2111 | frame_authorized = 1; |
| 2112 | break; |
| 2113 | case AP_RX_DROP: |
| 2114 | goto rx_dropped; |
| 2115 | case AP_RX_EXIT: |
| 2116 | goto rx_exit; |
| 2117 | } |
| 2118 | } |
| 2119 | #endif |
| 2120 | /* Nullfunc frames may have PS-bit set, so they must be passed to |
| 2121 | * hostap_handle_sta_rx() before being dropped here. */ |
| 2122 | if (stype != RTLLIB_STYPE_DATA && |
| 2123 | stype != RTLLIB_STYPE_DATA_CFACK && |
| 2124 | stype != RTLLIB_STYPE_DATA_CFPOLL && |
| 2125 | stype != RTLLIB_STYPE_DATA_CFACKPOLL&& |
| 2126 | stype != RTLLIB_STYPE_QOS_DATA |
| 2127 | ) { |
| 2128 | if (stype != RTLLIB_STYPE_NULLFUNC) |
| 2129 | RTLLIB_DEBUG_DROP( |
| 2130 | "RX: dropped data frame " |
| 2131 | "with no data (type=0x%02x, " |
| 2132 | "subtype=0x%02x, len=%d)\n", |
| 2133 | type, stype, skb->len); |
| 2134 | goto rx_dropped; |
| 2135 | } |
| 2136 | |
| 2137 | if (skb->len == hdrlen){ |
| 2138 | goto rx_dropped; |
| 2139 | } |
| 2140 | |
| 2141 | { |
| 2142 | /* network filter more precisely */ |
| 2143 | switch (ieee->iw_mode) { |
| 2144 | case IW_MODE_ADHOC: |
| 2145 | /* packets from our adapter are dropped (echo) */ |
| 2146 | if (!memcmp(hdr->addr2, dev->dev_addr, ETH_ALEN)) |
| 2147 | goto rx_dropped; |
| 2148 | |
| 2149 | /* {broad,multi}cast packets to our BSSID go through */ |
| 2150 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 2151 | if (!memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)) |
| 2152 | break; |
| 2153 | else |
| 2154 | goto rx_dropped; |
| 2155 | } |
| 2156 | |
| 2157 | /* packets not to our adapter, just discard it */ |
| 2158 | if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) { |
| 2159 | if (bToOtherSTA) |
| 2160 | break; |
| 2161 | else |
| 2162 | goto rx_dropped; |
| 2163 | } |
| 2164 | |
| 2165 | break; |
| 2166 | |
| 2167 | case IW_MODE_INFRA: |
| 2168 | /* packets from our adapter are dropped (echo) */ |
| 2169 | if (!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) |
| 2170 | goto rx_dropped; |
| 2171 | |
| 2172 | /* {broad,multi}cast packets to our BSS go through */ |
| 2173 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 2174 | if (!memcmp(hdr->addr2, ieee->current_network.bssid, ETH_ALEN)) |
| 2175 | break; |
| 2176 | else |
| 2177 | goto rx_dropped; |
| 2178 | } |
| 2179 | |
| 2180 | /* packets to our adapter go through */ |
| 2181 | if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) { |
| 2182 | if (bToOtherSTA) |
| 2183 | break; |
| 2184 | else |
| 2185 | goto rx_dropped; |
| 2186 | } |
| 2187 | |
| 2188 | break; |
| 2189 | } |
| 2190 | |
| 2191 | |
| 2192 | } |
| 2193 | |
| 2194 | if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP) |
| 2195 | && (ieee->polling)) { |
| 2196 | if (WLAN_FC_MORE_DATA(fc)) { |
| 2197 | /* more data bit is set, let's request a new frame from the AP */ |
| 2198 | rtllib_sta_ps_send_pspoll_frame(ieee); |
| 2199 | } else { |
| 2200 | ieee->polling = false; |
| 2201 | } |
| 2202 | } |
| 2203 | |
| 2204 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 2205 | if (ieee->iw_mode == IW_MODE_ADHOC){ |
| 2206 | psta = GetStaInfo(ieee, src); |
| 2207 | if (NULL != psta) |
| 2208 | psta->LastActiveTime = jiffies; |
| 2209 | } |
| 2210 | #endif |
| 2211 | /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ |
| 2212 | if ((!rx_stats->Decrypted)){ |
| 2213 | ieee->need_sw_enc = 1; |
| 2214 | } |
| 2215 | |
| 2216 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && |
| 2217 | ((keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt)) < 0)) { |
| 2218 | printk("decrypt frame error\n"); |
| 2219 | goto rx_dropped; |
| 2220 | } |
| 2221 | if (tmp_dump) { |
| 2222 | printk("************after decrypt\n"); |
| 2223 | dump_buf(skb->data,skb->len); |
| 2224 | } |
| 2225 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 2226 | |
| 2227 | /* skb: hdr + (possibly fragmented) plaintext payload */ |
| 2228 | if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) { |
| 2229 | int flen; |
| 2230 | struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); |
| 2231 | RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); |
| 2232 | |
| 2233 | if (!frag_skb) { |
| 2234 | RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG, |
| 2235 | "Rx cannot get skb from fragment " |
| 2236 | "cache (morefrag=%d seq=%u frag=%u)\n", |
| 2237 | (fc & RTLLIB_FCTL_MOREFRAGS) != 0, |
| 2238 | WLAN_GET_SEQ_SEQ(sc), frag); |
| 2239 | goto rx_dropped; |
| 2240 | } |
| 2241 | flen = skb->len; |
| 2242 | if (frag != 0) |
| 2243 | flen -= hdrlen; |
| 2244 | |
| 2245 | if (frag_skb->tail + flen > frag_skb->end) { |
| 2246 | printk(KERN_WARNING "%s: host decrypted and " |
| 2247 | "reassembled frame did not fit skb\n", |
| 2248 | dev->name); |
| 2249 | rtllib_frag_cache_invalidate(ieee, hdr); |
| 2250 | goto rx_dropped; |
| 2251 | } |
| 2252 | |
| 2253 | if (frag == 0) { |
| 2254 | /* copy first fragment (including full headers) into |
| 2255 | * beginning of the fragment cache skb */ |
| 2256 | memcpy(skb_put(frag_skb, flen), skb->data, flen); |
| 2257 | } else { |
| 2258 | /* append frame payload to the end of the fragment |
| 2259 | * cache skb */ |
| 2260 | memcpy(skb_put(frag_skb, flen), skb->data + hdrlen, |
| 2261 | flen); |
| 2262 | } |
| 2263 | dev_kfree_skb_any(skb); |
| 2264 | skb = NULL; |
| 2265 | |
| 2266 | if (fc & RTLLIB_FCTL_MOREFRAGS) { |
| 2267 | /* more fragments expected - leave the skb in fragment |
| 2268 | * cache for now; it will be delivered to upper layers |
| 2269 | * after all fragments have been received */ |
| 2270 | goto rx_exit; |
| 2271 | } |
| 2272 | |
| 2273 | /* this was the last fragment and the frame will be |
| 2274 | * delivered, so remove skb from fragment cache */ |
| 2275 | skb = frag_skb; |
| 2276 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 2277 | rtllib_frag_cache_invalidate(ieee, hdr); |
| 2278 | } |
| 2279 | |
| 2280 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still |
| 2281 | * encrypted/authenticated */ |
| 2282 | if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && |
| 2283 | rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { |
| 2284 | printk("==>decrypt msdu error\n"); |
| 2285 | goto rx_dropped; |
| 2286 | } |
| 2287 | |
| 2288 | ieee->LinkDetectInfo.NumRecvDataInPeriod++; |
| 2289 | ieee->LinkDetectInfo.NumRxOkInPeriod++; |
| 2290 | |
| 2291 | hdr = (struct rtllib_hdr_4addr *) skb->data; |
| 2292 | if ((!is_multicast_ether_addr(hdr->addr1)) && (!is_broadcast_ether_addr(hdr->addr1))) |
| 2293 | unicast_packet = true; |
| 2294 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) { |
| 2295 | if (/*ieee->ieee802_1x &&*/ |
| 2296 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 2297 | |
| 2298 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2299 | /* pass unencrypted EAPOL frames even if encryption is |
| 2300 | * configured */ |
| 2301 | struct eapol *eap = (struct eapol *)(skb->data + |
| 2302 | 24); |
| 2303 | RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 2304 | eap_get_type(eap->type)); |
| 2305 | #endif |
| 2306 | } else { |
| 2307 | RTLLIB_DEBUG_DROP( |
| 2308 | "encryption configured, but RX " |
| 2309 | "frame not encrypted (SA=" MAC_FMT ")\n", |
| 2310 | MAC_ARG(hdr->addr2)); |
| 2311 | goto rx_dropped; |
| 2312 | } |
| 2313 | } |
| 2314 | |
| 2315 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2316 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && |
| 2317 | rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 2318 | struct eapol *eap = (struct eapol *)(skb->data + |
| 2319 | 24); |
| 2320 | RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", |
| 2321 | eap_get_type(eap->type)); |
| 2322 | } |
| 2323 | #endif |
| 2324 | |
| 2325 | if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep && |
| 2326 | !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { |
| 2327 | RTLLIB_DEBUG_DROP( |
| 2328 | "dropped unencrypted RX data " |
| 2329 | "frame from " MAC_FMT |
| 2330 | " (drop_unencrypted=1)\n", |
| 2331 | MAC_ARG(hdr->addr2)); |
| 2332 | goto rx_dropped; |
| 2333 | } |
| 2334 | if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) |
| 2335 | && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1)) { |
| 2336 | TID = Frame_QoSTID(skb->data); |
| 2337 | SeqNum = WLAN_GET_SEQ_SEQ(sc); |
| 2338 | GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true); |
| 2339 | if (TID !=0 && TID !=3) |
| 2340 | ieee->bis_any_nonbepkts = true; |
| 2341 | } |
| 2342 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
| 2343 | payload = skb->data + hdrlen; |
| 2344 | rxb = (struct rtllib_rxb*)kmalloc(sizeof(struct rtllib_rxb),GFP_ATOMIC); |
| 2345 | if (rxb == NULL) { |
| 2346 | RTLLIB_DEBUG(RTLLIB_DL_ERR,"%s(): kmalloc rxb error\n",__func__); |
| 2347 | goto rx_dropped; |
| 2348 | } |
| 2349 | /* to parse amsdu packets */ |
| 2350 | /* qos data packets & reserved bit is 1 */ |
| 2351 | if (parse_subframe(ieee,skb,rx_stats,rxb,src,dst) == 0) { |
| 2352 | /* only to free rxb, and not submit the packets to upper layer */ |
| 2353 | for (i =0; i < rxb->nr_subframes; i++) { |
| 2354 | dev_kfree_skb(rxb->subframes[i]); |
| 2355 | } |
| 2356 | kfree(rxb); |
| 2357 | rxb = NULL; |
| 2358 | goto rx_dropped; |
| 2359 | } |
| 2360 | #if !defined(RTL8192SU) && !defined(RTL8192U) |
| 2361 | if (unicast_packet) { |
| 2362 | if (type == RTLLIB_FTYPE_DATA) { |
| 2363 | if (ieee->bIsAggregateFrame) |
| 2364 | ieee->LinkDetectInfo.NumRxUnicastOkInPeriod+=rxb->nr_subframes; |
| 2365 | else |
| 2366 | ieee->LinkDetectInfo.NumRxUnicastOkInPeriod++; |
| 2367 | |
| 2368 | if ((ieee->state == RTLLIB_LINKED) /*&& !MgntInitAdapterInProgress(pMgntInfo)*/) { |
| 2369 | if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +ieee->LinkDetectInfo.NumTxOkInPeriod) > 8 ) || |
| 2370 | (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) { |
| 2371 | if (ieee->LeisurePSLeave) |
| 2372 | ieee->LeisurePSLeave(dev); |
| 2373 | } |
| 2374 | } |
| 2375 | } |
| 2376 | } |
| 2377 | #endif |
| 2378 | ieee->last_rx_ps_time = jiffies; |
| 2379 | if (ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL || bToOtherSTA ){ |
| 2380 | for (i = 0; i<rxb->nr_subframes; i++) { |
| 2381 | struct sk_buff *sub_skb = rxb->subframes[i]; |
| 2382 | |
| 2383 | if (sub_skb) { |
| 2384 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 2385 | ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; |
| 2386 | if (sub_skb->len >= 8 && |
| 2387 | ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && |
| 2388 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 2389 | memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 2390 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 2391 | * replace EtherType */ |
| 2392 | skb_pull(sub_skb, SNAP_SIZE); |
| 2393 | memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); |
| 2394 | memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); |
| 2395 | } else { |
| 2396 | u16 len; |
| 2397 | /* Leave Ethernet header part of hdr and full payload */ |
| 2398 | len = htons(sub_skb->len); |
| 2399 | memcpy(skb_push(sub_skb, 2), &len, 2); |
| 2400 | memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); |
| 2401 | memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); |
| 2402 | } |
| 2403 | |
| 2404 | stats->rx_packets++; |
| 2405 | stats->rx_bytes += sub_skb->len; |
| 2406 | |
| 2407 | if (is_multicast_ether_addr(dst)) { |
| 2408 | stats->multicast++; |
| 2409 | } |
| 2410 | |
| 2411 | /* Indicat the packets to upper layer */ |
| 2412 | memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); |
| 2413 | sub_skb->protocol = eth_type_trans(sub_skb, dev); |
| 2414 | sub_skb->dev = dev; |
| 2415 | sub_skb->dev->stats.rx_packets++; |
| 2416 | sub_skb->dev->stats.rx_bytes += sub_skb->len; |
| 2417 | #ifdef TCP_CSUM_OFFLOAD_RX |
| 2418 | if ( rx_stats->tcp_csum_valid) |
| 2419 | sub_skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2420 | else |
| 2421 | sub_skb->ip_summed = CHECKSUM_NONE; |
| 2422 | #else |
| 2423 | sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
| 2424 | #endif |
| 2425 | |
| 2426 | netif_rx(sub_skb); |
| 2427 | } |
| 2428 | } |
| 2429 | kfree(rxb); |
| 2430 | rxb = NULL; |
| 2431 | |
| 2432 | } |
| 2433 | else |
| 2434 | { |
| 2435 | RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__func__); |
| 2436 | #ifdef TCP_CSUM_OFFLOAD_RX |
| 2437 | rxb->tcp_csum_valid = rx_stats->tcp_csum_valid; |
| 2438 | #endif |
| 2439 | RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum); |
| 2440 | } |
| 2441 | #ifndef JOHN_NOCPY |
| 2442 | dev_kfree_skb(skb); |
| 2443 | #endif |
| 2444 | |
| 2445 | rx_exit: |
| 2446 | #ifdef NOT_YET |
| 2447 | if (sta) |
| 2448 | hostap_handle_sta_release(sta); |
| 2449 | #endif |
| 2450 | return 1; |
| 2451 | |
| 2452 | rx_dropped: |
| 2453 | if (rxb != NULL) |
| 2454 | { |
| 2455 | kfree(rxb); |
| 2456 | rxb = NULL; |
| 2457 | } |
| 2458 | stats->rx_dropped++; |
| 2459 | |
| 2460 | /* Returning 0 indicates to caller that we have not handled the SKB-- |
| 2461 | * so it is still allocated and can be used again by underlying |
| 2462 | * hardware as a DMA target */ |
| 2463 | return 0; |
| 2464 | } |
| 2465 | #endif |
| 2466 | |
| 2467 | #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 |
| 2468 | |
| 2469 | static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; |
| 2470 | |
| 2471 | /* |
| 2472 | * Make ther structure we read from the beacon packet has |
| 2473 | * the right values |
| 2474 | */ |
| 2475 | static int rtllib_verify_qos_info(struct rtllib_qos_information_element |
| 2476 | *info_element, int sub_type) |
| 2477 | { |
| 2478 | |
| 2479 | if (info_element->qui_subtype != sub_type) |
| 2480 | return -1; |
| 2481 | if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) |
| 2482 | return -1; |
| 2483 | if (info_element->qui_type != QOS_OUI_TYPE) |
| 2484 | return -1; |
| 2485 | if (info_element->version != QOS_VERSION_1) |
| 2486 | return -1; |
| 2487 | |
| 2488 | return 0; |
| 2489 | } |
| 2490 | |
| 2491 | |
| 2492 | /* |
| 2493 | * Parse a QoS parameter element |
| 2494 | */ |
| 2495 | static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info |
| 2496 | *element_param, struct rtllib_info_element |
| 2497 | *info_element) |
| 2498 | { |
| 2499 | int ret = 0; |
| 2500 | u16 size = sizeof(struct rtllib_qos_parameter_info) - 2; |
| 2501 | |
| 2502 | if ((info_element == NULL) || (element_param == NULL)) |
| 2503 | return -1; |
| 2504 | |
| 2505 | if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { |
| 2506 | memcpy(element_param->info_element.qui, info_element->data, |
| 2507 | info_element->len); |
| 2508 | element_param->info_element.elementID = info_element->id; |
| 2509 | element_param->info_element.length = info_element->len; |
| 2510 | } else |
| 2511 | ret = -1; |
| 2512 | if (ret == 0) |
| 2513 | ret = rtllib_verify_qos_info(&element_param->info_element, |
| 2514 | QOS_OUI_PARAM_SUB_TYPE); |
| 2515 | return ret; |
| 2516 | } |
| 2517 | |
| 2518 | /* |
| 2519 | * Parse a QoS information element |
| 2520 | */ |
| 2521 | static int rtllib_read_qos_info_element(struct |
| 2522 | rtllib_qos_information_element |
| 2523 | *element_info, struct rtllib_info_element |
| 2524 | *info_element) |
| 2525 | { |
| 2526 | int ret = 0; |
| 2527 | u16 size = sizeof(struct rtllib_qos_information_element) - 2; |
| 2528 | |
| 2529 | if (element_info == NULL) |
| 2530 | return -1; |
| 2531 | if (info_element == NULL) |
| 2532 | return -1; |
| 2533 | |
| 2534 | if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { |
| 2535 | memcpy(element_info->qui, info_element->data, |
| 2536 | info_element->len); |
| 2537 | element_info->elementID = info_element->id; |
| 2538 | element_info->length = info_element->len; |
| 2539 | } else |
| 2540 | ret = -1; |
| 2541 | |
| 2542 | if (ret == 0) |
| 2543 | ret = rtllib_verify_qos_info(element_info, |
| 2544 | QOS_OUI_INFO_SUB_TYPE); |
| 2545 | return ret; |
| 2546 | } |
| 2547 | |
| 2548 | |
| 2549 | /* |
| 2550 | * Write QoS parameters from the ac parameters. |
| 2551 | */ |
| 2552 | static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm, |
| 2553 | struct rtllib_qos_data *qos_data) |
| 2554 | { |
| 2555 | struct rtllib_qos_ac_parameter *ac_params; |
| 2556 | struct rtllib_qos_parameters *qos_param = &(qos_data->parameters); |
| 2557 | int rc = 0; |
| 2558 | int i; |
| 2559 | u8 aci; |
| 2560 | u8 acm; |
| 2561 | |
| 2562 | qos_data->wmm_acm = 0; |
| 2563 | for (i = 0; i < QOS_QUEUE_NUM; i++) { |
| 2564 | ac_params = &(param_elm->ac_params_record[i]); |
| 2565 | |
| 2566 | aci = (ac_params->aci_aifsn & 0x60) >> 5; |
| 2567 | acm = (ac_params->aci_aifsn & 0x10) >> 4; |
| 2568 | |
| 2569 | if (aci >= QOS_QUEUE_NUM) |
| 2570 | continue; |
| 2571 | switch (aci) { |
| 2572 | case 1: |
| 2573 | /* BIT(0) | BIT(3) */ |
| 2574 | if (acm) |
| 2575 | qos_data->wmm_acm |= (0x01<<0)|(0x01<<3); |
| 2576 | break; |
| 2577 | case 2: |
| 2578 | /* BIT(4) | BIT(5) */ |
| 2579 | if (acm) |
| 2580 | qos_data->wmm_acm |= (0x01<<4)|(0x01<<5); |
| 2581 | break; |
| 2582 | case 3: |
| 2583 | /* BIT(6) | BIT(7) */ |
| 2584 | if (acm) |
| 2585 | qos_data->wmm_acm |= (0x01<<6)|(0x01<<7); |
| 2586 | break; |
| 2587 | case 0: |
| 2588 | default: |
| 2589 | /* BIT(1) | BIT(2) */ |
| 2590 | if (acm) |
| 2591 | qos_data->wmm_acm |= (0x01<<1)|(0x01<<2); |
| 2592 | break; |
| 2593 | } |
| 2594 | |
| 2595 | qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; |
| 2596 | |
| 2597 | /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ |
| 2598 | qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci]; |
| 2599 | |
| 2600 | qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F; |
| 2601 | |
| 2602 | qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4; |
| 2603 | |
| 2604 | qos_param->flag[aci] = |
| 2605 | (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; |
| 2606 | qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit); |
| 2607 | } |
| 2608 | return rc; |
| 2609 | } |
| 2610 | |
| 2611 | /* |
| 2612 | * we have a generic data element which it may contain QoS information or |
| 2613 | * parameters element. check the information element length to decide |
| 2614 | * which type to read |
| 2615 | */ |
| 2616 | static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element |
| 2617 | *info_element, |
| 2618 | struct rtllib_network *network) |
| 2619 | { |
| 2620 | int rc = 0; |
| 2621 | struct rtllib_qos_information_element qos_info_element; |
| 2622 | |
| 2623 | rc = rtllib_read_qos_info_element(&qos_info_element, info_element); |
| 2624 | |
| 2625 | if (rc == 0) { |
| 2626 | network->qos_data.param_count = qos_info_element.ac_info & 0x0F; |
| 2627 | network->flags |= NETWORK_HAS_QOS_INFORMATION; |
| 2628 | } else { |
| 2629 | struct rtllib_qos_parameter_info param_element; |
| 2630 | |
| 2631 | rc = rtllib_read_qos_param_element(¶m_element, |
| 2632 | info_element); |
| 2633 | if (rc == 0) { |
| 2634 | rtllib_qos_convert_ac_to_parameters(¶m_element, |
| 2635 | &(network->qos_data)); |
| 2636 | network->flags |= NETWORK_HAS_QOS_PARAMETERS; |
| 2637 | network->qos_data.param_count = |
| 2638 | param_element.info_element.ac_info & 0x0F; |
| 2639 | } |
| 2640 | } |
| 2641 | |
| 2642 | if (rc == 0) { |
| 2643 | RTLLIB_DEBUG_QOS("QoS is supported\n"); |
| 2644 | network->qos_data.supported = 1; |
| 2645 | } |
| 2646 | return rc; |
| 2647 | } |
| 2648 | |
| 2649 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2650 | #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x |
| 2651 | |
| 2652 | static const char *get_info_element_string(u16 id) |
| 2653 | { |
| 2654 | switch (id) { |
| 2655 | MFIE_STRING(SSID); |
| 2656 | MFIE_STRING(RATES); |
| 2657 | MFIE_STRING(FH_SET); |
| 2658 | MFIE_STRING(DS_SET); |
| 2659 | MFIE_STRING(CF_SET); |
| 2660 | MFIE_STRING(TIM); |
| 2661 | MFIE_STRING(IBSS_SET); |
| 2662 | MFIE_STRING(COUNTRY); |
| 2663 | MFIE_STRING(HOP_PARAMS); |
| 2664 | MFIE_STRING(HOP_TABLE); |
| 2665 | MFIE_STRING(REQUEST); |
| 2666 | MFIE_STRING(CHALLENGE); |
| 2667 | MFIE_STRING(POWER_CONSTRAINT); |
| 2668 | MFIE_STRING(POWER_CAPABILITY); |
| 2669 | MFIE_STRING(TPC_REQUEST); |
| 2670 | MFIE_STRING(TPC_REPORT); |
| 2671 | MFIE_STRING(SUPP_CHANNELS); |
| 2672 | MFIE_STRING(CSA); |
| 2673 | MFIE_STRING(MEASURE_REQUEST); |
| 2674 | MFIE_STRING(MEASURE_REPORT); |
| 2675 | MFIE_STRING(QUIET); |
| 2676 | MFIE_STRING(IBSS_DFS); |
| 2677 | MFIE_STRING(RSN); |
| 2678 | MFIE_STRING(RATES_EX); |
| 2679 | MFIE_STRING(GENERIC); |
| 2680 | MFIE_STRING(QOS_PARAMETER); |
| 2681 | default: |
| 2682 | return "UNKNOWN"; |
| 2683 | } |
| 2684 | } |
| 2685 | #endif |
| 2686 | |
| 2687 | #ifdef ENABLE_DOT11D |
| 2688 | static inline void rtllib_extract_country_ie( |
| 2689 | struct rtllib_device *ieee, |
| 2690 | struct rtllib_info_element *info_element, |
| 2691 | struct rtllib_network *network, |
| 2692 | u8 * addr2) |
| 2693 | { |
| 2694 | if (IS_DOT11D_ENABLE(ieee)) { |
| 2695 | if (info_element->len!= 0) { |
| 2696 | memcpy(network->CountryIeBuf, info_element->data, info_element->len); |
| 2697 | network->CountryIeLen = info_element->len; |
| 2698 | |
| 2699 | if (!IS_COUNTRY_IE_VALID(ieee)) |
| 2700 | { |
| 2701 | if ((rtllib_act_scanning(ieee,false) == true) && (ieee->FirstIe_InScan == 1)) |
| 2702 | printk("Received beacon ContryIE, SSID: <%s>\n",network->ssid); |
| 2703 | Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data); |
| 2704 | } |
| 2705 | } |
| 2706 | |
| 2707 | if (IS_EQUAL_CIE_SRC(ieee, addr2)) { |
| 2708 | UPDATE_CIE_WATCHDOG(ieee); |
| 2709 | } |
| 2710 | } |
| 2711 | |
| 2712 | } |
| 2713 | #endif |
| 2714 | |
| 2715 | int rtllib_parse_info_param(struct rtllib_device *ieee, |
| 2716 | struct rtllib_info_element *info_element, |
| 2717 | u16 length, |
| 2718 | struct rtllib_network *network, |
| 2719 | struct rtllib_rx_stats *stats) |
| 2720 | { |
| 2721 | u8 i; |
| 2722 | short offset; |
| 2723 | u16 tmp_htcap_len=0; |
| 2724 | u16 tmp_htinfo_len=0; |
| 2725 | u16 ht_realtek_agg_len=0; |
| 2726 | u8 ht_realtek_agg_buf[MAX_IE_LEN]; |
| 2727 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2728 | char rates_str[64]; |
| 2729 | char *p; |
| 2730 | #endif |
| 2731 | while (length >= sizeof(*info_element)) { |
| 2732 | if (sizeof(*info_element) + info_element->len > length) { |
| 2733 | RTLLIB_DEBUG_MGMT("Info elem: parse failed: " |
| 2734 | "info_element->len + 2 > left : " |
| 2735 | "info_element->len+2=%zd left=%d, id=%d.\n", |
| 2736 | info_element->len + |
| 2737 | sizeof(*info_element), |
| 2738 | length, info_element->id); |
| 2739 | /* We stop processing but don't return an error here |
| 2740 | * because some misbehaviour APs break this rule. ie. |
| 2741 | * Orinoco AP1000. */ |
| 2742 | break; |
| 2743 | } |
| 2744 | |
| 2745 | switch (info_element->id) { |
| 2746 | case MFIE_TYPE_SSID: |
| 2747 | if (rtllib_is_empty_essid(info_element->data, |
| 2748 | info_element->len)) { |
| 2749 | network->flags |= NETWORK_EMPTY_ESSID; |
| 2750 | break; |
| 2751 | } |
| 2752 | |
| 2753 | network->ssid_len = min(info_element->len, |
| 2754 | (u8) IW_ESSID_MAX_SIZE); |
| 2755 | memcpy(network->ssid, info_element->data, network->ssid_len); |
| 2756 | if (network->ssid_len < IW_ESSID_MAX_SIZE) |
| 2757 | memset(network->ssid + network->ssid_len, 0, |
| 2758 | IW_ESSID_MAX_SIZE - network->ssid_len); |
| 2759 | |
| 2760 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", |
| 2761 | network->ssid, network->ssid_len); |
| 2762 | break; |
| 2763 | |
| 2764 | case MFIE_TYPE_RATES: |
| 2765 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2766 | p = rates_str; |
| 2767 | #endif |
| 2768 | network->rates_len = min(info_element->len, |
| 2769 | MAX_RATES_LENGTH); |
| 2770 | for (i = 0; i < network->rates_len; i++) { |
| 2771 | network->rates[i] = info_element->data[i]; |
| 2772 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2773 | p += snprintf(p, sizeof(rates_str) - |
| 2774 | (p - rates_str), "%02X ", |
| 2775 | network->rates[i]); |
| 2776 | #endif |
| 2777 | if (rtllib_is_ofdm_rate |
| 2778 | (info_element->data[i])) { |
| 2779 | network->flags |= NETWORK_HAS_OFDM; |
| 2780 | if (info_element->data[i] & |
| 2781 | RTLLIB_BASIC_RATE_MASK) |
| 2782 | network->flags &= |
| 2783 | ~NETWORK_HAS_CCK; |
| 2784 | } |
| 2785 | |
| 2786 | if (rtllib_is_cck_rate |
| 2787 | (info_element->data[i])) { |
| 2788 | network->flags |= NETWORK_HAS_CCK; |
| 2789 | } |
| 2790 | } |
| 2791 | |
| 2792 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", |
| 2793 | rates_str, network->rates_len); |
| 2794 | break; |
| 2795 | |
| 2796 | case MFIE_TYPE_RATES_EX: |
| 2797 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2798 | p = rates_str; |
| 2799 | #endif |
| 2800 | network->rates_ex_len = min(info_element->len, |
| 2801 | MAX_RATES_EX_LENGTH); |
| 2802 | for (i = 0; i < network->rates_ex_len; i++) { |
| 2803 | network->rates_ex[i] = info_element->data[i]; |
| 2804 | #ifdef CONFIG_RTLLIB_DEBUG |
| 2805 | p += snprintf(p, sizeof(rates_str) - |
| 2806 | (p - rates_str), "%02X ", |
| 2807 | network->rates[i]); |
| 2808 | #endif |
| 2809 | if (rtllib_is_ofdm_rate |
| 2810 | (info_element->data[i])) { |
| 2811 | network->flags |= NETWORK_HAS_OFDM; |
| 2812 | if (info_element->data[i] & |
| 2813 | RTLLIB_BASIC_RATE_MASK) |
| 2814 | network->flags &= |
| 2815 | ~NETWORK_HAS_CCK; |
| 2816 | } |
| 2817 | } |
| 2818 | |
| 2819 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", |
| 2820 | rates_str, network->rates_ex_len); |
| 2821 | break; |
| 2822 | |
| 2823 | case MFIE_TYPE_DS_SET: |
| 2824 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", |
| 2825 | info_element->data[0]); |
| 2826 | network->channel = info_element->data[0]; |
| 2827 | break; |
| 2828 | |
| 2829 | case MFIE_TYPE_FH_SET: |
| 2830 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); |
| 2831 | break; |
| 2832 | |
| 2833 | case MFIE_TYPE_CF_SET: |
| 2834 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); |
| 2835 | break; |
| 2836 | |
| 2837 | case MFIE_TYPE_TIM: |
| 2838 | if (info_element->len < 4) |
| 2839 | break; |
| 2840 | |
| 2841 | network->tim.tim_count = info_element->data[0]; |
| 2842 | network->tim.tim_period = info_element->data[1]; |
| 2843 | |
| 2844 | network->dtim_period = info_element->data[1]; |
| 2845 | if (ieee->state != RTLLIB_LINKED) |
| 2846 | break; |
| 2847 | network->last_dtim_sta_time[0] = jiffies; |
| 2848 | network->last_dtim_sta_time[1] = stats->mac_time[1]; |
| 2849 | |
| 2850 | network->dtim_data = RTLLIB_DTIM_VALID; |
| 2851 | |
| 2852 | |
| 2853 | if (info_element->data[2] & 1) |
| 2854 | network->dtim_data |= RTLLIB_DTIM_MBCAST; |
| 2855 | |
| 2856 | #if 1 |
| 2857 | offset = (info_element->data[2] >> 1)*2; |
| 2858 | |
| 2859 | |
| 2860 | if (ieee->assoc_id < 8*offset || |
| 2861 | ieee->assoc_id > 8*(offset + info_element->len -3)) |
| 2862 | |
| 2863 | break; |
| 2864 | |
| 2865 | offset = (ieee->assoc_id / 8) - offset; |
| 2866 | if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) |
| 2867 | network->dtim_data |= RTLLIB_DTIM_UCAST; |
| 2868 | #else |
| 2869 | { |
| 2870 | u16 numSta = 0; |
| 2871 | u16 offset_byte = 0; |
| 2872 | u16 offset_bit = 0; |
| 2873 | |
| 2874 | numSta = (info_element->data[2] &0xFE)*8; |
| 2875 | |
| 2876 | if (ieee->assoc_id < numSta || |
| 2877 | ieee->assoc_id > (numSta + (info_element->len -3)*8)) |
| 2878 | break; |
| 2879 | |
| 2880 | offset = ieee->assoc_id - numSta; |
| 2881 | offset_byte = offset / 8; |
| 2882 | offset_bit = offset % 8; |
| 2883 | if (info_element->data[3+offset_byte] & (0x01<<offset_bit)) |
| 2884 | network->dtim_data |= RTLLIB_DTIM_UCAST; |
| 2885 | } |
| 2886 | #endif |
| 2887 | |
| 2888 | network->listen_interval = network->dtim_period; |
| 2889 | break; |
| 2890 | |
| 2891 | case MFIE_TYPE_ERP: |
| 2892 | network->erp_value = info_element->data[0]; |
| 2893 | network->flags |= NETWORK_HAS_ERP_VALUE; |
| 2894 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", |
| 2895 | network->erp_value); |
| 2896 | break; |
| 2897 | case MFIE_TYPE_IBSS_SET: |
| 2898 | network->atim_window = info_element->data[0]; |
| 2899 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", |
| 2900 | network->atim_window); |
| 2901 | break; |
| 2902 | |
| 2903 | case MFIE_TYPE_CHALLENGE: |
| 2904 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); |
| 2905 | break; |
| 2906 | |
| 2907 | case MFIE_TYPE_GENERIC: |
| 2908 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", |
| 2909 | info_element->len); |
| 2910 | if (!rtllib_parse_qos_info_param_IE(info_element, |
| 2911 | network)) |
| 2912 | break; |
| 2913 | if (info_element->len >= 4 && |
| 2914 | info_element->data[0] == 0x00 && |
| 2915 | info_element->data[1] == 0x50 && |
| 2916 | info_element->data[2] == 0xf2 && |
| 2917 | info_element->data[3] == 0x01) { |
| 2918 | network->wpa_ie_len = min(info_element->len + 2, |
| 2919 | MAX_WPA_IE_LEN); |
| 2920 | memcpy(network->wpa_ie, info_element, |
| 2921 | network->wpa_ie_len); |
| 2922 | break; |
| 2923 | } |
| 2924 | if (info_element->len == 7 && |
| 2925 | info_element->data[0] == 0x00 && |
| 2926 | info_element->data[1] == 0xe0 && |
| 2927 | info_element->data[2] == 0x4c && |
| 2928 | info_element->data[3] == 0x01 && |
| 2929 | info_element->data[4] == 0x02) |
| 2930 | network->Turbo_Enable = 1; |
| 2931 | |
| 2932 | if (tmp_htcap_len == 0) { |
| 2933 | if (info_element->len >= 4 && |
| 2934 | info_element->data[0] == 0x00 && |
| 2935 | info_element->data[1] == 0x90 && |
| 2936 | info_element->data[2] == 0x4c && |
| 2937 | info_element->data[3] == 0x033) { |
| 2938 | |
| 2939 | tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN); |
| 2940 | if (tmp_htcap_len != 0){ |
| 2941 | network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; |
| 2942 | network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\ |
| 2943 | sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len; |
| 2944 | memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen); |
| 2945 | } |
| 2946 | } |
| 2947 | if (tmp_htcap_len != 0){ |
| 2948 | network->bssht.bdSupportHT = true; |
| 2949 | network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0); |
| 2950 | }else{ |
| 2951 | network->bssht.bdSupportHT = false; |
| 2952 | network->bssht.bdHT1R = false; |
| 2953 | } |
| 2954 | } |
| 2955 | |
| 2956 | |
| 2957 | if (tmp_htinfo_len == 0){ |
| 2958 | if (info_element->len >= 4 && |
| 2959 | info_element->data[0] == 0x00 && |
| 2960 | info_element->data[1] == 0x90 && |
| 2961 | info_element->data[2] == 0x4c && |
| 2962 | info_element->data[3] == 0x034){ |
| 2963 | |
| 2964 | tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN); |
| 2965 | if (tmp_htinfo_len != 0){ |
| 2966 | network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; |
| 2967 | if (tmp_htinfo_len){ |
| 2968 | network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\ |
| 2969 | sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len; |
| 2970 | memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen); |
| 2971 | } |
| 2972 | |
| 2973 | } |
| 2974 | |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | if (ieee->aggregation){ |
| 2979 | if (network->bssht.bdSupportHT){ |
| 2980 | if (info_element->len >= 4 && |
| 2981 | info_element->data[0] == 0x00 && |
| 2982 | info_element->data[1] == 0xe0 && |
| 2983 | info_element->data[2] == 0x4c && |
| 2984 | info_element->data[3] == 0x02){ |
| 2985 | |
| 2986 | ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN); |
| 2987 | memcpy(ht_realtek_agg_buf,info_element->data,info_element->len); |
| 2988 | |
| 2989 | } |
| 2990 | if (ht_realtek_agg_len >= 5){ |
| 2991 | network->realtek_cap_exit = true; |
| 2992 | network->bssht.bdRT2RTAggregation = true; |
| 2993 | |
| 2994 | if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02)) |
| 2995 | network->bssht.bdRT2RTLongSlotTime = true; |
| 2996 | |
| 2997 | if ((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE)) |
| 2998 | { |
| 2999 | network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE; |
| 3000 | } |
| 3001 | } |
| 3002 | } |
| 3003 | if (ht_realtek_agg_len >= 5){ |
| 3004 | if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP)) |
| 3005 | network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP; |
| 3006 | } |
| 3007 | } |
| 3008 | |
| 3009 | { |
| 3010 | if ((info_element->len >= 3 && |
| 3011 | info_element->data[0] == 0x00 && |
| 3012 | info_element->data[1] == 0x05 && |
| 3013 | info_element->data[2] == 0xb5) || |
| 3014 | (info_element->len >= 3 && |
| 3015 | info_element->data[0] == 0x00 && |
| 3016 | info_element->data[1] == 0x0a && |
| 3017 | info_element->data[2] == 0xf7) || |
| 3018 | (info_element->len >= 3 && |
| 3019 | info_element->data[0] == 0x00 && |
| 3020 | info_element->data[1] == 0x10 && |
| 3021 | info_element->data[2] == 0x18)){ |
| 3022 | |
| 3023 | network->broadcom_cap_exist = true; |
| 3024 | |
| 3025 | } |
| 3026 | } |
| 3027 | if (info_element->len >= 3 && |
| 3028 | info_element->data[0] == 0x00 && |
| 3029 | info_element->data[1] == 0x0c && |
| 3030 | info_element->data[2] == 0x43) |
| 3031 | { |
| 3032 | network->ralink_cap_exist = true; |
| 3033 | } |
| 3034 | if ((info_element->len >= 3 && |
| 3035 | info_element->data[0] == 0x00 && |
| 3036 | info_element->data[1] == 0x03 && |
| 3037 | info_element->data[2] == 0x7f) || |
| 3038 | (info_element->len >= 3 && |
| 3039 | info_element->data[0] == 0x00 && |
| 3040 | info_element->data[1] == 0x13 && |
| 3041 | info_element->data[2] == 0x74)) |
| 3042 | { |
| 3043 | network->atheros_cap_exist = true; |
| 3044 | } |
| 3045 | |
| 3046 | if ((info_element->len >= 3 && |
| 3047 | info_element->data[0] == 0x00 && |
| 3048 | info_element->data[1] == 0x50 && |
| 3049 | info_element->data[2] == 0x43) ) |
| 3050 | { |
| 3051 | network->marvell_cap_exist = true; |
| 3052 | } |
| 3053 | if (info_element->len >= 3 && |
| 3054 | info_element->data[0] == 0x00 && |
| 3055 | info_element->data[1] == 0x40 && |
| 3056 | info_element->data[2] == 0x96) |
| 3057 | { |
| 3058 | network->cisco_cap_exist = true; |
| 3059 | } |
| 3060 | |
| 3061 | |
| 3062 | if (info_element->len >= 3 && |
| 3063 | info_element->data[0] == 0x00 && |
| 3064 | info_element->data[1] == 0x0a && |
| 3065 | info_element->data[2] == 0xf5) |
| 3066 | { |
| 3067 | network->airgo_cap_exist = true; |
| 3068 | } |
| 3069 | |
| 3070 | if (info_element->len > 4 && |
| 3071 | info_element->data[0] == 0x00 && |
| 3072 | info_element->data[1] == 0x40 && |
| 3073 | info_element->data[2] == 0x96 && |
| 3074 | info_element->data[3] == 0x01) |
| 3075 | { |
| 3076 | if (info_element->len == 6) |
| 3077 | { |
| 3078 | memcpy(network->CcxRmState, &info_element[4], 2); |
| 3079 | if (network->CcxRmState[0] != 0) |
| 3080 | { |
| 3081 | network->bCcxRmEnable = true; |
| 3082 | } |
| 3083 | else |
| 3084 | network->bCcxRmEnable = false; |
| 3085 | network->MBssidMask = network->CcxRmState[1] & 0x07; |
| 3086 | if (network->MBssidMask != 0) |
| 3087 | { |
| 3088 | network->bMBssidValid = true; |
| 3089 | network->MBssidMask = 0xff << (network->MBssidMask); |
| 3090 | memcpy(network->MBssid, network->bssid, ETH_ALEN); |
| 3091 | network->MBssid[5] &= network->MBssidMask; |
| 3092 | } |
| 3093 | else |
| 3094 | { |
| 3095 | network->bMBssidValid = false; |
| 3096 | } |
| 3097 | } |
| 3098 | else |
| 3099 | { |
| 3100 | network->bCcxRmEnable = false; |
| 3101 | } |
| 3102 | } |
| 3103 | if (info_element->len > 4 && |
| 3104 | info_element->data[0] == 0x00 && |
| 3105 | info_element->data[1] == 0x40 && |
| 3106 | info_element->data[2] == 0x96 && |
| 3107 | info_element->data[3] == 0x03) |
| 3108 | { |
| 3109 | if (info_element->len == 5) |
| 3110 | { |
| 3111 | network->bWithCcxVerNum = true; |
| 3112 | network->BssCcxVerNumber = info_element->data[4]; |
| 3113 | } |
| 3114 | else |
| 3115 | { |
| 3116 | network->bWithCcxVerNum = false; |
| 3117 | network->BssCcxVerNumber = 0; |
| 3118 | } |
| 3119 | } |
| 3120 | if (info_element->len > 4 && |
| 3121 | info_element->data[0] == 0x00 && |
| 3122 | info_element->data[1] == 0x50 && |
| 3123 | info_element->data[2] == 0xf2 && |
| 3124 | info_element->data[3] == 0x04) |
| 3125 | { |
| 3126 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n", |
| 3127 | info_element->len); |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3128 | network->wzc_ie_len = min(info_element->len+2, |
| 3129 | MAX_WZC_IE_LEN); |
| 3130 | memcpy(network->wzc_ie, info_element, |
| 3131 | network->wzc_ie_len); |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3132 | } |
| 3133 | break; |
| 3134 | |
| 3135 | case MFIE_TYPE_RSN: |
| 3136 | RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", |
| 3137 | info_element->len); |
| 3138 | network->rsn_ie_len = min(info_element->len + 2, |
| 3139 | MAX_WPA_IE_LEN); |
| 3140 | memcpy(network->rsn_ie, info_element, |
| 3141 | network->rsn_ie_len); |
| 3142 | break; |
| 3143 | |
| 3144 | case MFIE_TYPE_HT_CAP: |
| 3145 | RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n", |
| 3146 | info_element->len); |
| 3147 | tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN); |
| 3148 | if (tmp_htcap_len != 0){ |
| 3149 | network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC; |
| 3150 | network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\ |
| 3151 | sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len; |
| 3152 | memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen); |
| 3153 | |
| 3154 | network->bssht.bdSupportHT = true; |
| 3155 | network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0); |
| 3156 | |
| 3157 | network->bssht.bdBandWidth = (HT_CHANNEL_WIDTH)(((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->ChlWidth); |
| 3158 | } |
| 3159 | else{ |
| 3160 | network->bssht.bdSupportHT = false; |
| 3161 | network->bssht.bdHT1R = false; |
| 3162 | network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20 ; |
| 3163 | } |
| 3164 | break; |
| 3165 | |
| 3166 | |
| 3167 | case MFIE_TYPE_HT_INFO: |
| 3168 | RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n", |
| 3169 | info_element->len); |
| 3170 | tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN); |
| 3171 | if (tmp_htinfo_len){ |
| 3172 | network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE; |
| 3173 | network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\ |
| 3174 | sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len; |
| 3175 | memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen); |
| 3176 | } |
| 3177 | break; |
| 3178 | |
| 3179 | case MFIE_TYPE_AIRONET: |
| 3180 | RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n", |
| 3181 | info_element->len); |
| 3182 | if (info_element->len >IE_CISCO_FLAG_POSITION) |
| 3183 | { |
| 3184 | network->bWithAironetIE = true; |
| 3185 | |
| 3186 | if ( (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC) || |
| 3187 | (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK) ) |
| 3188 | { |
| 3189 | network->bCkipSupported = true; |
| 3190 | } |
| 3191 | else |
| 3192 | { |
| 3193 | network->bCkipSupported = false; |
| 3194 | } |
| 3195 | } |
| 3196 | else |
| 3197 | { |
| 3198 | network->bWithAironetIE = false; |
| 3199 | network->bCkipSupported = false; |
| 3200 | } |
| 3201 | break; |
| 3202 | case MFIE_TYPE_QOS_PARAMETER: |
| 3203 | printk(KERN_ERR |
| 3204 | "QoS Error need to parse QOS_PARAMETER IE\n"); |
| 3205 | break; |
| 3206 | |
| 3207 | #ifdef ENABLE_DOT11D |
| 3208 | case MFIE_TYPE_COUNTRY: |
| 3209 | RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", |
| 3210 | info_element->len); |
| 3211 | rtllib_extract_country_ie(ieee, info_element, network, network->bssid); |
| 3212 | break; |
| 3213 | #endif |
| 3214 | /* TODO */ |
| 3215 | default: |
| 3216 | RTLLIB_DEBUG_MGMT |
| 3217 | ("Unsupported info element: %s (%d)\n", |
| 3218 | get_info_element_string(info_element->id), |
| 3219 | info_element->id); |
| 3220 | break; |
| 3221 | } |
| 3222 | |
| 3223 | length -= sizeof(*info_element) + info_element->len; |
| 3224 | info_element = |
| 3225 | (struct rtllib_info_element *)&info_element-> |
| 3226 | data[info_element->len]; |
| 3227 | } |
| 3228 | |
| 3229 | if (!network->atheros_cap_exist && !network->broadcom_cap_exist && |
| 3230 | !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) |
| 3231 | { |
| 3232 | network->unknown_cap_exist = true; |
| 3233 | } |
| 3234 | else |
| 3235 | { |
| 3236 | network->unknown_cap_exist = false; |
| 3237 | } |
| 3238 | return 0; |
| 3239 | } |
| 3240 | |
| 3241 | static inline u8 rtllib_SignalStrengthTranslate( |
| 3242 | u8 CurrSS |
| 3243 | ) |
| 3244 | { |
| 3245 | u8 RetSS; |
| 3246 | |
| 3247 | if (CurrSS >= 71 && CurrSS <= 100) |
| 3248 | { |
| 3249 | RetSS = 90 + ((CurrSS - 70) / 3); |
| 3250 | } |
| 3251 | else if (CurrSS >= 41 && CurrSS <= 70) |
| 3252 | { |
| 3253 | RetSS = 78 + ((CurrSS - 40) / 3); |
| 3254 | } |
| 3255 | else if (CurrSS >= 31 && CurrSS <= 40) |
| 3256 | { |
| 3257 | RetSS = 66 + (CurrSS - 30); |
| 3258 | } |
| 3259 | else if (CurrSS >= 21 && CurrSS <= 30) |
| 3260 | { |
| 3261 | RetSS = 54 + (CurrSS - 20); |
| 3262 | } |
| 3263 | else if (CurrSS >= 5 && CurrSS <= 20) |
| 3264 | { |
| 3265 | RetSS = 42 + (((CurrSS - 5) * 2) / 3); |
| 3266 | } |
| 3267 | else if (CurrSS == 4) |
| 3268 | { |
| 3269 | RetSS = 36; |
| 3270 | } |
| 3271 | else if (CurrSS == 3) |
| 3272 | { |
| 3273 | RetSS = 27; |
| 3274 | } |
| 3275 | else if (CurrSS == 2) |
| 3276 | { |
| 3277 | RetSS = 18; |
| 3278 | } |
| 3279 | else if (CurrSS == 1) |
| 3280 | { |
| 3281 | RetSS = 9; |
| 3282 | } |
| 3283 | else |
| 3284 | { |
| 3285 | RetSS = CurrSS; |
| 3286 | } |
| 3287 | |
| 3288 | |
| 3289 | |
| 3290 | return RetSS; |
| 3291 | } |
| 3292 | |
| 3293 | long rtllib_translate_todbm(u8 signal_strength_index ) |
| 3294 | { |
| 3295 | long signal_power; |
| 3296 | |
| 3297 | signal_power = (long)((signal_strength_index + 1) >> 1); |
| 3298 | signal_power -= 95; |
| 3299 | |
| 3300 | return signal_power; |
| 3301 | } |
| 3302 | |
| 3303 | static inline int rtllib_network_init( |
| 3304 | struct rtllib_device *ieee, |
| 3305 | struct rtllib_probe_response *beacon, |
| 3306 | struct rtllib_network *network, |
| 3307 | struct rtllib_rx_stats *stats) |
| 3308 | { |
| 3309 | #ifdef CONFIG_RTLLIB_DEBUG |
| 3310 | #endif |
| 3311 | |
| 3312 | /* |
| 3313 | network->qos_data.active = 0; |
| 3314 | network->qos_data.supported = 0; |
| 3315 | network->qos_data.param_count = 0; |
| 3316 | network->qos_data.old_param_count = 0; |
| 3317 | */ |
| 3318 | memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data)); |
| 3319 | |
| 3320 | /* Pull out fixed field data */ |
| 3321 | memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); |
| 3322 | network->capability = le16_to_cpu(beacon->capability); |
| 3323 | network->last_scanned = jiffies; |
| 3324 | network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); |
| 3325 | network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); |
| 3326 | network->beacon_interval = le32_to_cpu(beacon->beacon_interval); |
| 3327 | /* Where to pull this? beacon->listen_interval;*/ |
| 3328 | network->listen_interval = 0x0A; |
| 3329 | network->rates_len = network->rates_ex_len = 0; |
| 3330 | network->last_associate = 0; |
| 3331 | network->ssid_len = 0; |
| 3332 | network->hidden_ssid_len = 0; |
| 3333 | memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid)); |
| 3334 | network->flags = 0; |
| 3335 | network->atim_window = 0; |
| 3336 | network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? |
| 3337 | 0x3 : 0x0; |
| 3338 | network->berp_info_valid = false; |
| 3339 | network->broadcom_cap_exist = false; |
| 3340 | network->ralink_cap_exist = false; |
| 3341 | network->atheros_cap_exist = false; |
| 3342 | network->cisco_cap_exist = false; |
| 3343 | network->unknown_cap_exist = false; |
| 3344 | network->realtek_cap_exit = false; |
| 3345 | network->marvell_cap_exist = false; |
| 3346 | network->airgo_cap_exist = false; |
| 3347 | network->Turbo_Enable = 0; |
| 3348 | network->SignalStrength = stats->SignalStrength; |
| 3349 | network->RSSI = stats->SignalStrength; |
| 3350 | #ifdef ENABLE_DOT11D |
| 3351 | network->CountryIeLen = 0; |
| 3352 | memset(network->CountryIeBuf, 0, MAX_IE_LEN); |
| 3353 | #endif |
| 3354 | HTInitializeBssDesc(&network->bssht); |
| 3355 | if (stats->freq == RTLLIB_52GHZ_BAND) { |
| 3356 | /* for A band (No DS info) */ |
| 3357 | network->channel = stats->received_channel; |
| 3358 | } else |
| 3359 | network->flags |= NETWORK_HAS_CCK; |
| 3360 | |
| 3361 | network->wpa_ie_len = 0; |
| 3362 | network->rsn_ie_len = 0; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3363 | network->wzc_ie_len = 0; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3364 | |
| 3365 | if (rtllib_parse_info_param(ieee, |
| 3366 | beacon->info_element, |
| 3367 | (stats->len - sizeof(*beacon)), |
| 3368 | network, |
| 3369 | stats)) |
| 3370 | return 1; |
| 3371 | |
| 3372 | network->mode = 0; |
| 3373 | if (stats->freq == RTLLIB_52GHZ_BAND) |
| 3374 | network->mode = IEEE_A; |
| 3375 | else { |
| 3376 | if (network->flags & NETWORK_HAS_OFDM) |
| 3377 | network->mode |= IEEE_G; |
| 3378 | if (network->flags & NETWORK_HAS_CCK) |
| 3379 | network->mode |= IEEE_B; |
| 3380 | } |
| 3381 | |
| 3382 | if (network->mode == 0) { |
| 3383 | RTLLIB_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' " |
| 3384 | "network.\n", |
| 3385 | escape_essid(network->ssid, |
| 3386 | network->ssid_len), |
| 3387 | MAC_ARG(network->bssid)); |
| 3388 | return 1; |
| 3389 | } |
| 3390 | |
| 3391 | if (network->bssht.bdSupportHT){ |
| 3392 | if (network->mode == IEEE_A) |
| 3393 | network->mode = IEEE_N_5G; |
| 3394 | else if (network->mode & (IEEE_G | IEEE_B)) |
| 3395 | network->mode = IEEE_N_24G; |
| 3396 | } |
| 3397 | if (rtllib_is_empty_essid(network->ssid, network->ssid_len)) |
| 3398 | network->flags |= NETWORK_EMPTY_ESSID; |
| 3399 | stats->signal = 30 + (stats->SignalStrength * 70) / 100; |
| 3400 | stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) -25; |
| 3401 | |
| 3402 | memcpy(&network->stats, stats, sizeof(network->stats)); |
| 3403 | |
| 3404 | return 0; |
| 3405 | } |
| 3406 | |
| 3407 | static inline int is_same_network(struct rtllib_network *src, |
| 3408 | struct rtllib_network *dst, u8 ssidbroad) |
| 3409 | { |
| 3410 | /* A network is only a duplicate if the channel, BSSID, ESSID |
| 3411 | * and the capability field (in particular IBSS and BSS) all match. |
| 3412 | * We treat all <hidden> with the same BSSID and channel |
| 3413 | * as one network */ |
| 3414 | return |
| 3415 | (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) && |
| 3416 | (src->channel == dst->channel) && |
| 3417 | !memcmp(src->bssid, dst->bssid, ETH_ALEN) && |
| 3418 | (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (!ssidbroad)) && |
| 3419 | ((src->capability & WLAN_CAPABILITY_IBSS) == |
| 3420 | (dst->capability & WLAN_CAPABILITY_IBSS)) && |
| 3421 | ((src->capability & WLAN_CAPABILITY_ESS) == |
| 3422 | (dst->capability & WLAN_CAPABILITY_ESS))); |
| 3423 | } |
| 3424 | |
| 3425 | static inline void update_ibss_network(struct rtllib_network *dst, |
| 3426 | struct rtllib_network *src) |
| 3427 | { |
| 3428 | memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); |
| 3429 | dst->last_scanned = jiffies; |
| 3430 | } |
| 3431 | |
| 3432 | |
| 3433 | static inline void update_network(struct rtllib_network *dst, |
| 3434 | struct rtllib_network *src) |
| 3435 | { |
| 3436 | int qos_active; |
| 3437 | u8 old_param; |
| 3438 | |
| 3439 | memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); |
| 3440 | dst->capability = src->capability; |
| 3441 | memcpy(dst->rates, src->rates, src->rates_len); |
| 3442 | dst->rates_len = src->rates_len; |
| 3443 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); |
| 3444 | dst->rates_ex_len = src->rates_ex_len; |
| 3445 | if (src->ssid_len > 0) |
| 3446 | { |
| 3447 | if (dst->ssid_len == 0) |
| 3448 | { |
| 3449 | memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid)); |
| 3450 | dst->hidden_ssid_len = src->ssid_len; |
| 3451 | memcpy(dst->hidden_ssid, src->ssid, src->ssid_len); |
| 3452 | }else{ |
| 3453 | memset(dst->ssid, 0, dst->ssid_len); |
| 3454 | dst->ssid_len = src->ssid_len; |
| 3455 | memcpy(dst->ssid, src->ssid, src->ssid_len); |
| 3456 | } |
| 3457 | } |
| 3458 | dst->mode = src->mode; |
| 3459 | dst->flags = src->flags; |
| 3460 | dst->time_stamp[0] = src->time_stamp[0]; |
| 3461 | dst->time_stamp[1] = src->time_stamp[1]; |
| 3462 | if (src->flags & NETWORK_HAS_ERP_VALUE) |
| 3463 | { |
| 3464 | dst->erp_value = src->erp_value; |
| 3465 | dst->berp_info_valid = src->berp_info_valid = true; |
| 3466 | } |
| 3467 | dst->beacon_interval = src->beacon_interval; |
| 3468 | dst->listen_interval = src->listen_interval; |
| 3469 | dst->atim_window = src->atim_window; |
| 3470 | dst->dtim_period = src->dtim_period; |
| 3471 | dst->dtim_data = src->dtim_data; |
| 3472 | dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; |
| 3473 | dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; |
| 3474 | memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters)); |
| 3475 | |
| 3476 | dst->bssht.bdSupportHT = src->bssht.bdSupportHT; |
| 3477 | dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation; |
| 3478 | dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen; |
| 3479 | memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen); |
| 3480 | dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen; |
| 3481 | memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen); |
| 3482 | dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer; |
| 3483 | dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime; |
| 3484 | dst->broadcom_cap_exist = src->broadcom_cap_exist; |
| 3485 | dst->ralink_cap_exist = src->ralink_cap_exist; |
| 3486 | dst->atheros_cap_exist = src->atheros_cap_exist; |
| 3487 | dst->realtek_cap_exit = src->realtek_cap_exit; |
| 3488 | dst->marvell_cap_exist = src->marvell_cap_exist; |
| 3489 | dst->cisco_cap_exist = src->cisco_cap_exist; |
| 3490 | dst->airgo_cap_exist = src->airgo_cap_exist; |
| 3491 | dst->unknown_cap_exist = src->unknown_cap_exist; |
| 3492 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); |
| 3493 | dst->wpa_ie_len = src->wpa_ie_len; |
| 3494 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); |
| 3495 | dst->rsn_ie_len = src->rsn_ie_len; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3496 | memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len); |
| 3497 | dst->wzc_ie_len = src->wzc_ie_len; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3498 | |
| 3499 | dst->last_scanned = jiffies; |
| 3500 | /* qos related parameters */ |
| 3501 | qos_active = dst->qos_data.active; |
| 3502 | old_param = dst->qos_data.param_count; |
| 3503 | dst->qos_data.supported = src->qos_data.supported; |
| 3504 | if (dst->flags & NETWORK_HAS_QOS_PARAMETERS) |
| 3505 | memcpy(&dst->qos_data, &src->qos_data, sizeof(struct rtllib_qos_data)); |
| 3506 | if (dst->qos_data.supported == 1) { |
| 3507 | if (dst->ssid_len) |
| 3508 | RTLLIB_DEBUG_QOS |
| 3509 | ("QoS the network %s is QoS supported\n", |
| 3510 | dst->ssid); |
| 3511 | else |
| 3512 | RTLLIB_DEBUG_QOS |
| 3513 | ("QoS the network is QoS supported\n"); |
| 3514 | } |
| 3515 | dst->qos_data.active = qos_active; |
| 3516 | dst->qos_data.old_param_count = old_param; |
| 3517 | |
| 3518 | /* dst->last_associate is not overwritten */ |
| 3519 | dst->wmm_info = src->wmm_info; |
| 3520 | if (src->wmm_param[0].ac_aci_acm_aifsn|| \ |
| 3521 | src->wmm_param[1].ac_aci_acm_aifsn|| \ |
| 3522 | src->wmm_param[2].ac_aci_acm_aifsn|| \ |
| 3523 | src->wmm_param[1].ac_aci_acm_aifsn) { |
| 3524 | memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); |
| 3525 | } |
| 3526 | |
| 3527 | dst->SignalStrength = src->SignalStrength; |
| 3528 | dst->RSSI = src->RSSI; |
| 3529 | dst->Turbo_Enable = src->Turbo_Enable; |
| 3530 | |
| 3531 | #ifdef ENABLE_DOT11D |
| 3532 | dst->CountryIeLen = src->CountryIeLen; |
| 3533 | memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); |
| 3534 | #endif |
| 3535 | |
| 3536 | dst->bWithAironetIE = src->bWithAironetIE; |
| 3537 | dst->bCkipSupported = src->bCkipSupported; |
| 3538 | memcpy(dst->CcxRmState,src->CcxRmState,2); |
| 3539 | dst->bCcxRmEnable = src->bCcxRmEnable; |
| 3540 | dst->MBssidMask = src->MBssidMask; |
| 3541 | dst->bMBssidValid = src->bMBssidValid; |
| 3542 | memcpy(dst->MBssid,src->MBssid,6); |
| 3543 | dst->bWithCcxVerNum = src->bWithCcxVerNum; |
| 3544 | dst->BssCcxVerNumber = src->BssCcxVerNumber; |
| 3545 | |
| 3546 | } |
| 3547 | static inline int is_beacon(__le16 fc) |
| 3548 | { |
| 3549 | return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON); |
| 3550 | } |
| 3551 | |
| 3552 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 3553 | u8 AsocEntry_ComputeSum(u8 *paddr) |
| 3554 | { |
| 3555 | u32 sum; |
| 3556 | |
| 3557 | sum = paddr[0]+ |
| 3558 | paddr[1]+ |
| 3559 | paddr[2]+ |
| 3560 | paddr[3]+ |
| 3561 | paddr[4]+ |
| 3562 | paddr[5]; |
| 3563 | |
| 3564 | return (u8)(sum % PEER_MAX_ASSOC); |
| 3565 | } |
| 3566 | u8 AsocEntry_AssignAvailableAID(struct rtllib_device *ieee, u8 *paddr) |
| 3567 | { |
| 3568 | int i; |
| 3569 | |
| 3570 | for (i = 0; i < PEER_MAX_ASSOC; i++) |
| 3571 | { |
| 3572 | if (ieee->AvailableAIDTable[i] == 99) |
| 3573 | { |
| 3574 | ieee->AvailableAIDTable[i] = AsocEntry_ComputeSum(paddr); |
| 3575 | return i+1; |
| 3576 | } |
| 3577 | } |
| 3578 | |
| 3579 | return 1; |
| 3580 | } |
| 3581 | |
| 3582 | void InitStaInfo(struct rtllib_device *ieee,int index) |
| 3583 | { |
| 3584 | int idx = index; |
| 3585 | ieee->peer_assoc_list[idx]->StaDataRate = 0; |
| 3586 | ieee->peer_assoc_list[idx]->StaSS = 0; |
| 3587 | ieee->peer_assoc_list[idx]->RetryFrameCnt = 0; |
| 3588 | ieee->peer_assoc_list[idx]->NoRetryFrameCnt = 0; |
| 3589 | ieee->peer_assoc_list[idx]->LastRetryCnt = 0; |
| 3590 | ieee->peer_assoc_list[idx]->LastNoRetryCnt = 0; |
| 3591 | ieee->peer_assoc_list[idx]->AvgRetryRate = 0; |
| 3592 | ieee->peer_assoc_list[idx]->LastRetryRate = 0; |
| 3593 | ieee->peer_assoc_list[idx]->txRateIndex = 11; |
| 3594 | ieee->peer_assoc_list[idx]->APDataRate = 0x2; |
| 3595 | ieee->peer_assoc_list[idx]->ForcedDataRate = 0x2; |
| 3596 | |
| 3597 | } |
| 3598 | static u8 IsStaInfoExist(struct rtllib_device *ieee, u8 *addr) |
| 3599 | { |
| 3600 | int k=0; |
| 3601 | struct sta_info * psta = NULL; |
| 3602 | u8 sta_idx = PEER_MAX_ASSOC; |
| 3603 | |
| 3604 | for (k=0; k<PEER_MAX_ASSOC; k++) |
| 3605 | { |
| 3606 | psta = ieee->peer_assoc_list[k]; |
| 3607 | if (NULL != psta) |
| 3608 | { |
| 3609 | if (memcmp(addr, psta->macaddr, ETH_ALEN) == 0) |
| 3610 | { |
| 3611 | sta_idx = k; |
| 3612 | break; |
| 3613 | } |
| 3614 | } |
| 3615 | } |
| 3616 | return sta_idx; |
| 3617 | } |
| 3618 | static u8 GetFreeStaInfoIdx(struct rtllib_device *ieee, u8 *addr) |
| 3619 | { |
| 3620 | int k = 0; |
| 3621 | while((ieee->peer_assoc_list[k] != NULL) && (k < PEER_MAX_ASSOC)) |
| 3622 | k++; |
| 3623 | printk("%s: addr:"MAC_FMT" index: %d\n", __func__, MAC_ARG(addr), k); |
| 3624 | return k; |
| 3625 | } |
| 3626 | struct sta_info *GetStaInfo(struct rtllib_device *ieee, u8 *addr) |
| 3627 | { |
| 3628 | int k=0; |
| 3629 | struct sta_info * psta = NULL; |
| 3630 | struct sta_info * psta_find = NULL; |
| 3631 | |
| 3632 | for (k=0; k<PEER_MAX_ASSOC; k++) |
| 3633 | { |
| 3634 | psta = ieee->peer_assoc_list[k]; |
| 3635 | if (NULL != psta) |
| 3636 | { |
| 3637 | if (memcmp(addr, psta->macaddr, ETH_ALEN) == 0) |
| 3638 | { |
| 3639 | psta_find = psta; |
| 3640 | break; |
| 3641 | } |
| 3642 | } |
| 3643 | } |
| 3644 | return psta_find; |
| 3645 | } |
| 3646 | void DelStaInfoList(struct rtllib_device *ieee) |
| 3647 | { |
| 3648 | int idx = 0; |
| 3649 | struct sta_info * AsocEntry = NULL; |
| 3650 | |
| 3651 | atomic_set(&ieee->AsocEntryNum, 0); |
| 3652 | for (idx=0; idx<PEER_MAX_ASSOC; idx++){ |
| 3653 | AsocEntry = ieee->peer_assoc_list[idx]; |
| 3654 | if (NULL != AsocEntry){ |
| 3655 | kfree(AsocEntry); |
| 3656 | ieee->peer_assoc_list[idx] = NULL; |
| 3657 | } |
| 3658 | ieee->AvailableAIDTable[idx] = 99; |
| 3659 | } |
| 3660 | } |
| 3661 | void DelStaInfo(struct rtllib_device *ieee, u8 *addr) |
| 3662 | { |
| 3663 | struct sta_info * psta = NULL; |
| 3664 | int k=0; |
| 3665 | |
| 3666 | for (k=0; k<PEER_MAX_ASSOC; k++) |
| 3667 | { |
| 3668 | psta = ieee->peer_assoc_list[k]; |
| 3669 | if (NULL != psta){ |
| 3670 | if (memcmp(addr, psta->macaddr, ETH_ALEN) == 0){ |
| 3671 | if (psta->aid > 0 && psta->aid-1 < PEER_MAX_ASSOC) |
| 3672 | ieee->AvailableAIDTable[psta->aid-1] = 99; |
| 3673 | else |
| 3674 | printk("%s(): clear non-existing entry AID\n", __func__); |
| 3675 | |
| 3676 | kfree(psta); |
| 3677 | ieee->peer_assoc_list[k] = NULL; |
| 3678 | atomic_dec(&ieee->AsocEntryNum); |
| 3679 | } |
| 3680 | } |
| 3681 | } |
| 3682 | } |
| 3683 | void IbssAgeFunction(struct rtllib_device *ieee) |
| 3684 | { |
| 3685 | struct sta_info* AsocEntry = NULL; |
| 3686 | int idx; |
| 3687 | unsigned long CurrentTime; |
| 3688 | signed long TimeDifference; |
| 3689 | struct rtllib_network *target; |
| 3690 | |
| 3691 | CurrentTime = jiffies; |
| 3692 | |
| 3693 | for (idx = 0; idx < PEER_MAX_ASSOC; idx++) |
| 3694 | { |
| 3695 | AsocEntry = ieee->peer_assoc_list[idx]; |
| 3696 | if (AsocEntry) |
| 3697 | { |
| 3698 | TimeDifference = jiffies_to_msecs(CurrentTime - AsocEntry->LastActiveTime); |
| 3699 | |
| 3700 | if (TimeDifference > 20000) |
| 3701 | { |
| 3702 | printk("IbssAgeFunction(): "MAC_FMT" timeout\n", MAC_ARG(AsocEntry->macaddr)); |
| 3703 | kfree(AsocEntry); |
| 3704 | ieee->peer_assoc_list[idx] = NULL; |
| 3705 | atomic_dec(&ieee->AsocEntryNum); |
| 3706 | |
| 3707 | if (atomic_read(&ieee->AsocEntryNum) == 0){ |
| 3708 | |
| 3709 | down(&ieee->wx_sem); |
| 3710 | rtllib_stop_protocol(ieee,true); |
| 3711 | |
| 3712 | list_for_each_entry(target, &ieee->network_list, list) { |
| 3713 | if (is_same_network(target, &ieee->current_network,(target->ssid_len?1:0))){ |
| 3714 | printk("delete sta of previous Ad-hoc\n"); |
| 3715 | list_del(&target->list); |
| 3716 | break; |
| 3717 | } |
| 3718 | } |
| 3719 | |
| 3720 | rtllib_start_protocol(ieee); |
| 3721 | up(&ieee->wx_sem); |
| 3722 | } |
| 3723 | } |
| 3724 | } |
| 3725 | } |
| 3726 | |
| 3727 | #ifdef TO_DO_LIST |
| 3728 | if (AsocEntry_AnyStationAssociated(pMgntInfo)==false) |
| 3729 | DrvIFIndicateDisassociation(Adapter, unspec_reason); |
| 3730 | |
| 3731 | if (pMgntInfo->dot11CurrentWirelessMode == WIRELESS_MODE_G || |
| 3732 | (IS_WIRELESS_MODE_N_24G(Adapter) && pMgntInfo->pHTInfo->bCurSuppCCK) ) |
| 3733 | { |
| 3734 | if (nBModeStaCnt == 0) |
| 3735 | { |
| 3736 | pMgntInfo->bUseProtection = false; |
| 3737 | ActUpdate_mCapInfo(Adapter, pMgntInfo->mCap); |
| 3738 | } |
| 3739 | } |
| 3740 | |
| 3741 | if (IS_WIRELESS_MODE_N_24G(Adapter) || IS_WIRELESS_MODE_N_5G(Adapter) ) |
| 3742 | { |
| 3743 | if (nLegacyStaCnt > 0) |
| 3744 | { |
| 3745 | pMgntInfo->pHTInfo->CurrentOpMode = HT_OPMODE_MIXED; |
| 3746 | } |
| 3747 | else |
| 3748 | { |
| 3749 | if ((pMgntInfo->pHTInfo->bCurBW40MHz) && (n20MHzStaCnt > 0)) |
| 3750 | pMgntInfo->pHTInfo->CurrentOpMode = HT_OPMODE_40MHZ_PROTECT; |
| 3751 | else |
| 3752 | pMgntInfo->pHTInfo->CurrentOpMode = HT_OPMODE_NO_PROTECT; |
| 3753 | |
| 3754 | } |
| 3755 | } |
| 3756 | |
| 3757 | if (IS_WIRELESS_MODE_G(Adapter) || |
| 3758 | (IS_WIRELESS_MODE_N_24G(Adapter) && pMgntInfo->pHTInfo->bCurSuppCCK)) |
| 3759 | { |
| 3760 | if (pMgntInfo->bUseProtection) |
| 3761 | { |
| 3762 | u8 CckRate[4] = { MGN_1M, MGN_2M, MGN_5_5M, MGN_11M }; |
| 3763 | OCTET_STRING osCckRate; |
| 3764 | FillOctetString(osCckRate, CckRate, 4); |
| 3765 | FilterSupportRate(pMgntInfo->mBrates, &osCckRate, false); |
| 3766 | Adapter->HalFunc.SetHwRegHandler(Adapter, HW_VAR_BASIC_RATE, (pu1Byte)&osCckRate); |
| 3767 | } |
| 3768 | else |
| 3769 | { |
| 3770 | Adapter->HalFunc.SetHwRegHandler( Adapter, HW_VAR_BASIC_RATE, (pu1Byte)(&pMgntInfo->mBrates) ); |
| 3771 | } |
| 3772 | } |
| 3773 | #endif |
| 3774 | } |
| 3775 | #endif |
| 3776 | |
| 3777 | static int IsPassiveChannel( struct rtllib_device *rtllib, u8 channel) |
| 3778 | { |
| 3779 | if (MAX_CHANNEL_NUMBER < channel) { |
| 3780 | printk("%s(): Invalid Channel\n", __func__); |
| 3781 | return 0; |
| 3782 | } |
| 3783 | |
| 3784 | if (rtllib->active_channel_map[channel] == 2) |
| 3785 | return 1; |
| 3786 | |
| 3787 | return 0; |
| 3788 | } |
| 3789 | |
| 3790 | int IsLegalChannel( struct rtllib_device *rtllib, u8 channel) |
| 3791 | { |
| 3792 | if (MAX_CHANNEL_NUMBER < channel) { |
| 3793 | printk("%s(): Invalid Channel\n", __func__); |
| 3794 | return 0; |
| 3795 | } |
| 3796 | if (rtllib->active_channel_map[channel] > 0) |
| 3797 | return 1; |
| 3798 | |
| 3799 | return 0; |
| 3800 | } |
| 3801 | |
| 3802 | |
| 3803 | static inline void rtllib_process_probe_response( |
| 3804 | struct rtllib_device *ieee, |
| 3805 | struct rtllib_probe_response *beacon, |
| 3806 | struct rtllib_rx_stats *stats) |
| 3807 | { |
| 3808 | struct rtllib_network *target; |
| 3809 | struct rtllib_network *oldest = NULL; |
| 3810 | #ifdef CONFIG_RTLLIB_DEBUG |
| 3811 | struct rtllib_info_element *info_element = &beacon->info_element[0]; |
| 3812 | #endif |
| 3813 | unsigned long flags; |
| 3814 | short renew; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3815 | struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), GFP_ATOMIC); |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3816 | |
Mike McCormack | cb76215 | 2011-07-11 08:56:20 +0900 | [diff] [blame^] | 3817 | if (!network) |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3818 | return; |
Larry Finger | 94a7994 | 2011-08-23 19:00:42 -0500 | [diff] [blame] | 3819 | |
| 3820 | RTLLIB_DEBUG_SCAN( |
| 3821 | "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", |
| 3822 | escape_essid(info_element->data, info_element->len), |
| 3823 | MAC_ARG(beacon->header.addr3), |
| 3824 | (beacon->capability & (1<<0xf)) ? '1' : '0', |
| 3825 | (beacon->capability & (1<<0xe)) ? '1' : '0', |
| 3826 | (beacon->capability & (1<<0xd)) ? '1' : '0', |
| 3827 | (beacon->capability & (1<<0xc)) ? '1' : '0', |
| 3828 | (beacon->capability & (1<<0xb)) ? '1' : '0', |
| 3829 | (beacon->capability & (1<<0xa)) ? '1' : '0', |
| 3830 | (beacon->capability & (1<<0x9)) ? '1' : '0', |
| 3831 | (beacon->capability & (1<<0x8)) ? '1' : '0', |
| 3832 | (beacon->capability & (1<<0x7)) ? '1' : '0', |
| 3833 | (beacon->capability & (1<<0x6)) ? '1' : '0', |
| 3834 | (beacon->capability & (1<<0x5)) ? '1' : '0', |
| 3835 | (beacon->capability & (1<<0x4)) ? '1' : '0', |
| 3836 | (beacon->capability & (1<<0x3)) ? '1' : '0', |
| 3837 | (beacon->capability & (1<<0x2)) ? '1' : '0', |
| 3838 | (beacon->capability & (1<<0x1)) ? '1' : '0', |
| 3839 | (beacon->capability & (1<<0x0)) ? '1' : '0'); |
| 3840 | |
| 3841 | if (rtllib_network_init(ieee, beacon, network, stats)) { |
| 3842 | RTLLIB_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n", |
| 3843 | escape_essid(info_element->data, |
| 3844 | info_element->len), |
| 3845 | MAC_ARG(beacon->header.addr3), |
| 3846 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 3847 | RTLLIB_STYPE_PROBE_RESP ? |
| 3848 | "PROBE RESPONSE" : "BEACON"); |
| 3849 | goto free_network; |
| 3850 | } |
| 3851 | |
| 3852 | |
| 3853 | if (!IsLegalChannel(ieee, network->channel)) |
| 3854 | goto free_network; |
| 3855 | |
| 3856 | if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == RTLLIB_STYPE_PROBE_RESP) { |
| 3857 | if (IsPassiveChannel(ieee, network->channel)) { |
| 3858 | printk("GetScanInfo(): For Global Domain, " |
| 3859 | "filter probe response at channel(%d).\n", network->channel); |
| 3860 | goto free_network; |
| 3861 | } |
| 3862 | } |
| 3863 | |
| 3864 | /* The network parsed correctly -- so now we scan our known networks |
| 3865 | * to see if we can find it in our list. |
| 3866 | * |
| 3867 | * NOTE: This search is definitely not optimized. Once its doing |
| 3868 | * the "right thing" we'll optimize it for efficiency if |
| 3869 | * necessary */ |
| 3870 | |
| 3871 | /* Search for this entry in the list and update it if it is |
| 3872 | * already there. */ |
| 3873 | |
| 3874 | spin_lock_irqsave(&ieee->lock, flags); |
| 3875 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 3876 | if (is_beacon(beacon->header.frame_ctl)){ |
| 3877 | if ((ieee->iw_mode == IW_MODE_ADHOC) && (ieee->state == RTLLIB_LINKED)) |
| 3878 | { |
| 3879 | if ((network->ssid_len == ieee->current_network.ssid_len) |
| 3880 | && (!memcmp(network->ssid,ieee->current_network.ssid,ieee->current_network.ssid_len)) |
| 3881 | && (network->channel == ieee->current_network.channel) |
| 3882 | && (ieee->current_network.channel > 0) |
| 3883 | && (ieee->current_network.channel <= 14)) |
| 3884 | { |
| 3885 | if (!memcmp(ieee->current_network.bssid,network->bssid,6)) |
| 3886 | { |
| 3887 | int idx = 0; |
| 3888 | struct rtllib_hdr_3addr* header = NULL; |
| 3889 | int idx_exist = 0; |
| 3890 | if (timer_pending(&ieee->ibss_wait_timer)) |
| 3891 | del_timer_sync(&ieee->ibss_wait_timer); |
| 3892 | header = (struct rtllib_hdr_3addr*)&(beacon->header); |
| 3893 | idx_exist = IsStaInfoExist(ieee,header->addr2); |
| 3894 | if (idx_exist >= PEER_MAX_ASSOC) { |
| 3895 | idx = GetFreeStaInfoIdx(ieee, header->addr2); |
| 3896 | } else { |
| 3897 | ieee->peer_assoc_list[idx_exist]->LastActiveTime = jiffies; |
| 3898 | goto no_alloc; |
| 3899 | } |
| 3900 | if (idx >= PEER_MAX_ASSOC - 1) { |
| 3901 | printk("\n%s():ERR!!!Buffer overflow - could not append!!!",__func__); |
| 3902 | goto free_network; |
| 3903 | } else { |
| 3904 | ieee->peer_assoc_list[idx] = (struct sta_info *)kmalloc(sizeof(struct sta_info), GFP_ATOMIC); |
| 3905 | memset(ieee->peer_assoc_list[idx], 0, sizeof(struct sta_info)); |
| 3906 | ieee->peer_assoc_list[idx]->LastActiveTime = jiffies; |
| 3907 | memcpy(ieee->peer_assoc_list[idx]->macaddr,header->addr2,ETH_ALEN); |
| 3908 | ieee->peer_assoc_list[idx]->ratr_index = 8; |
| 3909 | InitStaInfo(ieee,idx); |
| 3910 | atomic_inc(&ieee->AsocEntryNum); |
| 3911 | ieee->peer_assoc_list[idx]->aid = AsocEntry_AssignAvailableAID(ieee, ieee->peer_assoc_list[idx]->macaddr); |
| 3912 | ieee->check_ht_cap(ieee->dev,ieee->peer_assoc_list[idx],network); |
| 3913 | queue_delayed_work_rsl(ieee->wq, &ieee->update_assoc_sta_info_wq, 0); |
| 3914 | ieee->Adhoc_InitRateAdaptive(ieee->dev,ieee->peer_assoc_list[idx]); |
| 3915 | } |
| 3916 | } |
| 3917 | } |
| 3918 | } |
| 3919 | } |
| 3920 | if (ieee->iw_mode == IW_MODE_ADHOC){ |
| 3921 | if ((network->ssid_len == ieee->current_network.ssid_len) |
| 3922 | && (!memcmp(network->ssid,ieee->current_network.ssid,ieee->current_network.ssid_len)) |
| 3923 | && (network->capability & WLAN_CAPABILITY_IBSS) |
| 3924 | && (ieee->state == RTLLIB_LINKED_SCANNING)) |
| 3925 | { |
| 3926 | if (memcmp(ieee->current_network.bssid,network->bssid,6)) |
| 3927 | { |
| 3928 | printk("%s(): SSID matched but BSSID mismatched.\n",__func__); |
| 3929 | |
| 3930 | ieee->TargetTsf = beacon->time_stamp[1]; |
| 3931 | ieee->TargetTsf <<= 32; |
| 3932 | ieee->TargetTsf |= beacon->time_stamp[0]; |
| 3933 | |
| 3934 | ieee->CurrTsf = stats->TimeStampLow; |
| 3935 | |
| 3936 | queue_delayed_work_rsl(ieee->wq, &ieee->check_tsf_wq, 0); |
| 3937 | } |
| 3938 | } |
| 3939 | } |
| 3940 | #endif |
| 3941 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 3942 | no_alloc: |
| 3943 | if (ieee->iw_mode == IW_MODE_INFRA) |
| 3944 | #endif |
| 3945 | { |
| 3946 | if (is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))) { |
| 3947 | update_network(&ieee->current_network, network); |
| 3948 | if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G) |
| 3949 | && ieee->current_network.berp_info_valid){ |
| 3950 | if (ieee->current_network.erp_value& ERP_UseProtection) |
| 3951 | ieee->current_network.buseprotection = true; |
| 3952 | else |
| 3953 | ieee->current_network.buseprotection = false; |
| 3954 | } |
| 3955 | if (is_beacon(beacon->header.frame_ctl)) |
| 3956 | { |
| 3957 | if (ieee->state >= RTLLIB_LINKED) |
| 3958 | ieee->LinkDetectInfo.NumRecvBcnInPeriod++; |
| 3959 | } |
| 3960 | } |
| 3961 | } |
| 3962 | #if defined(RTL8192U) || defined(RTL8192SU) || defined(RTL8192SE) |
| 3963 | else if (ieee->iw_mode == IW_MODE_ADHOC) |
| 3964 | { |
| 3965 | if (is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))) { |
| 3966 | update_ibss_network(&ieee->current_network, network); |
| 3967 | } |
| 3968 | } |
| 3969 | #endif |
| 3970 | list_for_each_entry(target, &ieee->network_list, list) { |
| 3971 | if (is_same_network(target, network,(target->ssid_len?1:0))) |
| 3972 | break; |
| 3973 | if ((oldest == NULL) || |
| 3974 | (target->last_scanned < oldest->last_scanned)) |
| 3975 | oldest = target; |
| 3976 | } |
| 3977 | |
| 3978 | /* If we didn't find a match, then get a new network slot to initialize |
| 3979 | * with this beacon's information */ |
| 3980 | if (&target->list == &ieee->network_list) { |
| 3981 | if (list_empty(&ieee->network_free_list)) { |
| 3982 | /* If there are no more slots, expire the oldest */ |
| 3983 | list_del(&oldest->list); |
| 3984 | target = oldest; |
| 3985 | RTLLIB_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from " |
| 3986 | "network list.\n", |
| 3987 | escape_essid(target->ssid, |
| 3988 | target->ssid_len), |
| 3989 | MAC_ARG(target->bssid)); |
| 3990 | } else { |
| 3991 | /* Otherwise just pull from the free list */ |
| 3992 | target = list_entry(ieee->network_free_list.next, |
| 3993 | struct rtllib_network, list); |
| 3994 | list_del(ieee->network_free_list.next); |
| 3995 | } |
| 3996 | |
| 3997 | |
| 3998 | #ifdef CONFIG_RTLLIB_DEBUG |
| 3999 | RTLLIB_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n", |
| 4000 | escape_essid(network->ssid, |
| 4001 | network->ssid_len), |
| 4002 | MAC_ARG(network->bssid), |
| 4003 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 4004 | RTLLIB_STYPE_PROBE_RESP ? |
| 4005 | "PROBE RESPONSE" : "BEACON"); |
| 4006 | #endif |
| 4007 | memcpy(target, network, sizeof(*target)); |
| 4008 | list_add_tail(&target->list, &ieee->network_list); |
| 4009 | if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) |
| 4010 | rtllib_softmac_new_net(ieee, network); |
| 4011 | } else { |
| 4012 | RTLLIB_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n", |
| 4013 | escape_essid(target->ssid, |
| 4014 | target->ssid_len), |
| 4015 | MAC_ARG(target->bssid), |
| 4016 | WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == |
| 4017 | RTLLIB_STYPE_PROBE_RESP ? |
| 4018 | "PROBE RESPONSE" : "BEACON"); |
| 4019 | |
| 4020 | /* we have an entry and we are going to update it. But this entry may |
| 4021 | * be already expired. In this case we do the same as we found a new |
| 4022 | * net and call the new_net handler |
| 4023 | */ |
| 4024 | renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); |
| 4025 | if ((!target->ssid_len) && |
| 4026 | (((network->ssid_len > 0) && (target->hidden_ssid_len == 0)) |
| 4027 | || ((ieee->current_network.ssid_len == network->ssid_len) && |
| 4028 | (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && |
| 4029 | (ieee->state == RTLLIB_NOLINK))) |
| 4030 | ) { |
| 4031 | renew = 1; |
| 4032 | } |
| 4033 | update_network(target, network); |
| 4034 | if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) |
| 4035 | rtllib_softmac_new_net(ieee, network); |
| 4036 | } |
| 4037 | |
| 4038 | spin_unlock_irqrestore(&ieee->lock, flags); |
| 4039 | if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))&&\ |
| 4040 | (ieee->state == RTLLIB_LINKED)) { |
| 4041 | if (ieee->handle_beacon != NULL) { |
| 4042 | ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network); |
| 4043 | } |
| 4044 | } |
| 4045 | free_network: |
| 4046 | kfree(network); |
| 4047 | return; |
| 4048 | } |
| 4049 | |
| 4050 | void rtllib_rx_mgt(struct rtllib_device *ieee, |
| 4051 | struct sk_buff *skb, |
| 4052 | struct rtllib_rx_stats *stats) |
| 4053 | { |
| 4054 | struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ; |
| 4055 | if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP && |
| 4056 | WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON) |
| 4057 | ieee->last_rx_ps_time = jiffies; |
| 4058 | |
| 4059 | switch (WLAN_FC_GET_STYPE(header->frame_ctl)) { |
| 4060 | |
| 4061 | case RTLLIB_STYPE_BEACON: |
| 4062 | RTLLIB_DEBUG_MGMT("received BEACON (%d)\n", |
| 4063 | WLAN_FC_GET_STYPE(header->frame_ctl)); |
| 4064 | RTLLIB_DEBUG_SCAN("Beacon\n"); |
| 4065 | rtllib_process_probe_response( |
| 4066 | ieee, (struct rtllib_probe_response *)header, stats); |
| 4067 | |
| 4068 | if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED && |
| 4069 | ieee->iw_mode == IW_MODE_INFRA && |
| 4070 | ieee->state == RTLLIB_LINKED)) |
| 4071 | tasklet_schedule(&ieee->ps_task); |
| 4072 | |
| 4073 | break; |
| 4074 | |
| 4075 | case RTLLIB_STYPE_PROBE_RESP: |
| 4076 | RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", |
| 4077 | WLAN_FC_GET_STYPE(header->frame_ctl)); |
| 4078 | RTLLIB_DEBUG_SCAN("Probe response\n"); |
| 4079 | rtllib_process_probe_response( |
| 4080 | ieee, (struct rtllib_probe_response *)header, stats); |
| 4081 | break; |
| 4082 | case RTLLIB_STYPE_PROBE_REQ: |
| 4083 | RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n", |
| 4084 | WLAN_FC_GET_STYPE(header->frame_ctl)); |
| 4085 | RTLLIB_DEBUG_SCAN("Probe request\n"); |
| 4086 | if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) && |
| 4087 | ((ieee->iw_mode == IW_MODE_ADHOC || |
| 4088 | ieee->iw_mode == IW_MODE_MASTER) && |
| 4089 | ieee->state == RTLLIB_LINKED)){ |
| 4090 | rtllib_rx_probe_rq(ieee, skb); |
| 4091 | } |
| 4092 | break; |
| 4093 | } |
| 4094 | |
| 4095 | } |