Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [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 | #include <linux/compiler.h> |
| 17 | #include <linux/config.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/if_arp.h> |
| 20 | #include <linux/in6.h> |
| 21 | #include <linux/in.h> |
| 22 | #include <linux/ip.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/netdevice.h> |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/skbuff.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/tcp.h> |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/version.h> |
| 32 | #include <linux/wireless.h> |
| 33 | #include <linux/etherdevice.h> |
| 34 | #include <asm/uaccess.h> |
| 35 | #include <linux/ctype.h> |
| 36 | |
| 37 | #include <net/ieee80211.h> |
| 38 | |
| 39 | static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, |
| 40 | struct sk_buff *skb, |
| 41 | struct ieee80211_rx_stats *rx_stats) |
| 42 | { |
| 43 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 44 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 45 | |
| 46 | skb->dev = ieee->dev; |
| 47 | skb->mac.raw = skb->data; |
| 48 | skb_pull(skb, ieee80211_get_hdrlen(fc)); |
| 49 | skb->pkt_type = PACKET_OTHERHOST; |
| 50 | skb->protocol = __constant_htons(ETH_P_80211_RAW); |
| 51 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 52 | netif_rx(skb); |
| 53 | } |
| 54 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 55 | /* Called only as a tasklet (software IRQ) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 56 | static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct |
| 57 | ieee80211_device |
| 58 | *ieee, |
| 59 | unsigned int seq, |
| 60 | unsigned int frag, |
| 61 | u8 * src, |
| 62 | u8 * dst) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 63 | { |
| 64 | struct ieee80211_frag_entry *entry; |
| 65 | int i; |
| 66 | |
| 67 | for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { |
| 68 | entry = &ieee->frag_cache[i]; |
| 69 | if (entry->skb != NULL && |
| 70 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 71 | IEEE80211_DEBUG_FRAG("expiring fragment cache entry " |
| 72 | "seq=%u last_frag=%u\n", |
| 73 | entry->seq, entry->last_frag); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 74 | dev_kfree_skb_any(entry->skb); |
| 75 | entry->skb = NULL; |
| 76 | } |
| 77 | |
| 78 | if (entry->skb != NULL && entry->seq == seq && |
| 79 | (entry->last_frag + 1 == frag || frag == -1) && |
| 80 | memcmp(entry->src_addr, src, ETH_ALEN) == 0 && |
| 81 | memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) |
| 82 | return entry; |
| 83 | } |
| 84 | |
| 85 | return NULL; |
| 86 | } |
| 87 | |
| 88 | /* Called only as a tasklet (software IRQ) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 89 | static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee, |
| 90 | struct ieee80211_hdr *hdr) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 91 | { |
| 92 | struct sk_buff *skb = NULL; |
| 93 | u16 sc; |
| 94 | unsigned int frag, seq; |
| 95 | struct ieee80211_frag_entry *entry; |
| 96 | |
| 97 | sc = le16_to_cpu(hdr->seq_ctl); |
| 98 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 99 | seq = WLAN_GET_SEQ_SEQ(sc); |
| 100 | |
| 101 | if (frag == 0) { |
| 102 | /* Reserve enough space to fit maximum frame length */ |
| 103 | skb = dev_alloc_skb(ieee->dev->mtu + |
| 104 | sizeof(struct ieee80211_hdr) + |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 105 | 8 /* LLC */ + |
| 106 | 2 /* alignment */ + |
| 107 | 8 /* WEP */ + ETH_ALEN /* WDS */ ); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 108 | if (skb == NULL) |
| 109 | return NULL; |
| 110 | |
| 111 | entry = &ieee->frag_cache[ieee->frag_next_idx]; |
| 112 | ieee->frag_next_idx++; |
| 113 | if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN) |
| 114 | ieee->frag_next_idx = 0; |
| 115 | |
| 116 | if (entry->skb != NULL) |
| 117 | dev_kfree_skb_any(entry->skb); |
| 118 | |
| 119 | entry->first_frag_time = jiffies; |
| 120 | entry->seq = seq; |
| 121 | entry->last_frag = frag; |
| 122 | entry->skb = skb; |
| 123 | memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); |
| 124 | memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); |
| 125 | } else { |
| 126 | /* received a fragment of a frame for which the head fragment |
| 127 | * should have already been received */ |
| 128 | entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2, |
| 129 | hdr->addr1); |
| 130 | if (entry != NULL) { |
| 131 | entry->last_frag = frag; |
| 132 | skb = entry->skb; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | return skb; |
| 137 | } |
| 138 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 139 | /* Called only as a tasklet (software IRQ) */ |
| 140 | static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, |
| 141 | struct ieee80211_hdr *hdr) |
| 142 | { |
| 143 | u16 sc; |
| 144 | unsigned int seq; |
| 145 | struct ieee80211_frag_entry *entry; |
| 146 | |
| 147 | sc = le16_to_cpu(hdr->seq_ctl); |
| 148 | seq = WLAN_GET_SEQ_SEQ(sc); |
| 149 | |
| 150 | entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2, |
| 151 | hdr->addr1); |
| 152 | |
| 153 | if (entry == NULL) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 154 | IEEE80211_DEBUG_FRAG("could not invalidate fragment cache " |
| 155 | "entry (seq=%u)\n", seq); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 156 | return -1; |
| 157 | } |
| 158 | |
| 159 | entry->skb = NULL; |
| 160 | return 0; |
| 161 | } |
| 162 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 163 | #ifdef NOT_YET |
| 164 | /* ieee80211_rx_frame_mgtmt |
| 165 | * |
| 166 | * Responsible for handling management control frames |
| 167 | * |
| 168 | * Called by ieee80211_rx */ |
| 169 | static inline int |
| 170 | ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 171 | struct ieee80211_rx_stats *rx_stats, u16 type, |
| 172 | u16 stype) |
| 173 | { |
| 174 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 175 | printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", |
| 176 | ieee->dev->name); |
| 177 | return 0; |
| 178 | /* |
| 179 | hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *) |
| 180 | skb->data);*/ |
| 181 | } |
| 182 | |
| 183 | if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) { |
| 184 | if (stype == WLAN_FC_STYPE_BEACON && |
| 185 | ieee->iw_mode == IW_MODE_MASTER) { |
| 186 | struct sk_buff *skb2; |
| 187 | /* Process beacon frames also in kernel driver to |
| 188 | * update STA(AP) table statistics */ |
| 189 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 190 | if (skb2) |
| 191 | hostap_rx(skb2->dev, skb2, rx_stats); |
| 192 | } |
| 193 | |
| 194 | /* send management frames to the user space daemon for |
| 195 | * processing */ |
| 196 | ieee->apdevstats.rx_packets++; |
| 197 | ieee->apdevstats.rx_bytes += skb->len; |
| 198 | prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); |
| 199 | return 0; |
| 200 | } |
| 201 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 202 | if (ieee->iw_mode == IW_MODE_MASTER) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 203 | if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { |
| 204 | printk(KERN_DEBUG "%s: unknown management frame " |
| 205 | "(type=0x%02x, stype=0x%02x) dropped\n", |
| 206 | skb->dev->name, type, stype); |
| 207 | return -1; |
| 208 | } |
| 209 | |
| 210 | hostap_rx(skb->dev, skb, rx_stats); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " |
| 215 | "received in non-Host AP mode\n", skb->dev->name); |
| 216 | return -1; |
| 217 | } |
| 218 | #endif |
| 219 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 220 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| 221 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 222 | static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| 223 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 224 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| 225 | static unsigned char bridge_tunnel_header[] = |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 226 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 227 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
| 228 | |
| 229 | /* Called by ieee80211_rx_frame_decrypt */ |
| 230 | static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, |
| 231 | struct sk_buff *skb) |
| 232 | { |
| 233 | struct net_device *dev = ieee->dev; |
| 234 | u16 fc, ethertype; |
| 235 | struct ieee80211_hdr *hdr; |
| 236 | u8 *pos; |
| 237 | |
| 238 | if (skb->len < 24) |
| 239 | return 0; |
| 240 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 241 | hdr = (struct ieee80211_hdr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 242 | fc = le16_to_cpu(hdr->frame_ctl); |
| 243 | |
| 244 | /* check that the frame is unicast frame to us */ |
| 245 | if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 246 | IEEE80211_FCTL_TODS && |
| 247 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && |
| 248 | memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { |
| 249 | /* ToDS frame with own addr BSSID and DA */ |
| 250 | } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 251 | IEEE80211_FCTL_FROMDS && |
| 252 | memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { |
| 253 | /* FromDS frame with own addr as DA */ |
| 254 | } else |
| 255 | return 0; |
| 256 | |
| 257 | if (skb->len < 24 + 8) |
| 258 | return 0; |
| 259 | |
| 260 | /* check for port access entity Ethernet type */ |
| 261 | pos = skb->data + 24; |
| 262 | ethertype = (pos[6] << 8) | pos[7]; |
| 263 | if (ethertype == ETH_P_PAE) |
| 264 | return 1; |
| 265 | |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
| 270 | static inline int |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 271 | ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 272 | struct ieee80211_crypt_data *crypt) |
| 273 | { |
| 274 | struct ieee80211_hdr *hdr; |
| 275 | int res, hdrlen; |
| 276 | |
| 277 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) |
| 278 | return 0; |
| 279 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 280 | hdr = (struct ieee80211_hdr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 281 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 282 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 283 | atomic_inc(&crypt->refcnt); |
| 284 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); |
| 285 | atomic_dec(&crypt->refcnt); |
| 286 | if (res < 0) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 287 | IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT |
| 288 | ") res=%d\n", MAC_ARG(hdr->addr2), res); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 289 | if (res == -2) |
| 290 | IEEE80211_DEBUG_DROP("Decryption failed ICV " |
| 291 | "mismatch (key %d)\n", |
| 292 | skb->data[hdrlen + 3] >> 6); |
| 293 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 294 | return -1; |
| 295 | } |
| 296 | |
| 297 | return res; |
| 298 | } |
| 299 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 300 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
| 301 | static inline int |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 302 | ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, |
| 303 | struct sk_buff *skb, int keyidx, |
| 304 | struct ieee80211_crypt_data *crypt) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 305 | { |
| 306 | struct ieee80211_hdr *hdr; |
| 307 | int res, hdrlen; |
| 308 | |
| 309 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) |
| 310 | return 0; |
| 311 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 312 | hdr = (struct ieee80211_hdr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 313 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 314 | |
| 315 | atomic_inc(&crypt->refcnt); |
| 316 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); |
| 317 | atomic_dec(&crypt->refcnt); |
| 318 | if (res < 0) { |
| 319 | printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" |
| 320 | " (SA=" MAC_FMT " keyidx=%d)\n", |
| 321 | ieee->dev->name, MAC_ARG(hdr->addr2), keyidx); |
| 322 | return -1; |
| 323 | } |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 328 | /* All received frames are sent to this function. @skb contains the frame in |
| 329 | * IEEE 802.11 format, i.e., in the format it was sent over air. |
| 330 | * This function is called only as a tasklet (software IRQ). */ |
| 331 | int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 332 | struct ieee80211_rx_stats *rx_stats) |
| 333 | { |
| 334 | struct net_device *dev = ieee->dev; |
| 335 | struct ieee80211_hdr *hdr; |
| 336 | size_t hdrlen; |
| 337 | u16 fc, type, stype, sc; |
| 338 | struct net_device_stats *stats; |
| 339 | unsigned int frag; |
| 340 | u8 *payload; |
| 341 | u16 ethertype; |
| 342 | #ifdef NOT_YET |
| 343 | struct net_device *wds = NULL; |
| 344 | struct sk_buff *skb2 = NULL; |
| 345 | struct net_device *wds = NULL; |
| 346 | int frame_authorized = 0; |
| 347 | int from_assoc_ap = 0; |
| 348 | void *sta = NULL; |
| 349 | #endif |
| 350 | u8 dst[ETH_ALEN]; |
| 351 | u8 src[ETH_ALEN]; |
| 352 | struct ieee80211_crypt_data *crypt = NULL; |
| 353 | int keyidx = 0; |
| 354 | |
| 355 | hdr = (struct ieee80211_hdr *)skb->data; |
| 356 | stats = &ieee->stats; |
| 357 | |
| 358 | if (skb->len < 10) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 359 | printk(KERN_INFO "%s: SKB length < 10\n", dev->name); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 360 | goto rx_dropped; |
| 361 | } |
| 362 | |
| 363 | fc = le16_to_cpu(hdr->frame_ctl); |
| 364 | type = WLAN_FC_GET_TYPE(fc); |
| 365 | stype = WLAN_FC_GET_STYPE(fc); |
| 366 | sc = le16_to_cpu(hdr->seq_ctl); |
| 367 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 368 | hdrlen = ieee80211_get_hdrlen(fc); |
| 369 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 370 | /* Put this code here so that we avoid duplicating it in all |
| 371 | * Rx paths. - Jean II */ |
| 372 | #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ |
| 373 | /* If spy monitoring on */ |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 374 | if (ieee->spy_data.spy_number > 0) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 375 | struct iw_quality wstats; |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 376 | |
| 377 | wstats.updated = 0; |
| 378 | if (rx_stats->mask & IEEE80211_STATMASK_RSSI) { |
| 379 | wstats.level = rx_stats->rssi; |
| 380 | wstats.updated |= IW_QUAL_LEVEL_UPDATED; |
| 381 | } else |
| 382 | wstats.updated |= IW_QUAL_LEVEL_INVALID; |
| 383 | |
| 384 | if (rx_stats->mask & IEEE80211_STATMASK_NOISE) { |
| 385 | wstats.noise = rx_stats->noise; |
| 386 | wstats.updated |= IW_QUAL_NOISE_UPDATED; |
| 387 | } else |
| 388 | wstats.updated |= IW_QUAL_NOISE_INVALID; |
| 389 | |
| 390 | if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) { |
| 391 | wstats.qual = rx_stats->signal; |
| 392 | wstats.updated |= IW_QUAL_QUAL_UPDATED; |
| 393 | } else |
| 394 | wstats.updated |= IW_QUAL_QUAL_INVALID; |
| 395 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 396 | /* Update spy records */ |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 397 | wireless_spy_update(ieee->dev, hdr->addr2, &wstats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 398 | } |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 399 | #endif /* IW_WIRELESS_SPY */ |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 400 | |
| 401 | #ifdef NOT_YET |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 402 | hostap_update_rx_stats(local->ap, hdr, rx_stats); |
| 403 | #endif |
| 404 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 405 | if (ieee->iw_mode == IW_MODE_MONITOR) { |
| 406 | ieee80211_monitor_rx(ieee, skb, rx_stats); |
| 407 | stats->rx_packets++; |
| 408 | stats->rx_bytes += skb->len; |
| 409 | return 1; |
| 410 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 411 | |
| 412 | if (ieee->host_decrypt) { |
| 413 | int idx = 0; |
| 414 | if (skb->len >= hdrlen + 3) |
| 415 | idx = skb->data[hdrlen + 3] >> 6; |
| 416 | crypt = ieee->crypt[idx]; |
| 417 | #ifdef NOT_YET |
| 418 | sta = NULL; |
| 419 | |
| 420 | /* Use station specific key to override default keys if the |
| 421 | * receiver address is a unicast address ("individual RA"). If |
| 422 | * bcrx_sta_key parameter is set, station specific key is used |
| 423 | * even with broad/multicast targets (this is against IEEE |
| 424 | * 802.11, but makes it easier to use different keys with |
| 425 | * stations that do not support WEP key mapping). */ |
| 426 | |
| 427 | if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 428 | (void)hostap_handle_sta_crypto(local, hdr, &crypt, |
| 429 | &sta); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 430 | #endif |
| 431 | |
| 432 | /* allow NULL decrypt to indicate an station specific override |
| 433 | * for default encryption */ |
| 434 | if (crypt && (crypt->ops == NULL || |
| 435 | crypt->ops->decrypt_mpdu == NULL)) |
| 436 | crypt = NULL; |
| 437 | |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 438 | if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 439 | /* This seems to be triggered by some (multicast?) |
| 440 | * frames from other than current BSS, so just drop the |
| 441 | * frames silently instead of filling system log with |
| 442 | * these reports. */ |
| 443 | IEEE80211_DEBUG_DROP("Decryption failed (not set)" |
| 444 | " (SA=" MAC_FMT ")\n", |
| 445 | MAC_ARG(hdr->addr2)); |
| 446 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 447 | goto rx_dropped; |
| 448 | } |
| 449 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 450 | #ifdef NOT_YET |
| 451 | if (type != WLAN_FC_TYPE_DATA) { |
| 452 | if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH && |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 453 | fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt && |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 454 | (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 455 | printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth " |
| 456 | "from " MAC_FMT "\n", dev->name, |
| 457 | MAC_ARG(hdr->addr2)); |
| 458 | /* TODO: could inform hostapd about this so that it |
| 459 | * could send auth failure report */ |
| 460 | goto rx_dropped; |
| 461 | } |
| 462 | |
| 463 | if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) |
| 464 | goto rx_dropped; |
| 465 | else |
| 466 | goto rx_exit; |
| 467 | } |
| 468 | #endif |
| 469 | |
| 470 | /* Data frame - extract src/dst addresses */ |
Jiri Benc | 286d974 | 2005-05-24 15:10:18 +0200 | [diff] [blame] | 471 | if (skb->len < IEEE80211_3ADDR_LEN) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 472 | goto rx_dropped; |
| 473 | |
| 474 | switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { |
| 475 | case IEEE80211_FCTL_FROMDS: |
| 476 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 477 | memcpy(src, hdr->addr3, ETH_ALEN); |
| 478 | break; |
| 479 | case IEEE80211_FCTL_TODS: |
| 480 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 481 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 482 | break; |
| 483 | case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: |
Jiri Benc | 286d974 | 2005-05-24 15:10:18 +0200 | [diff] [blame] | 484 | if (skb->len < IEEE80211_4ADDR_LEN) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 485 | goto rx_dropped; |
| 486 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 487 | memcpy(src, hdr->addr4, ETH_ALEN); |
| 488 | break; |
| 489 | case 0: |
| 490 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 491 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 492 | break; |
| 493 | } |
| 494 | |
| 495 | #ifdef NOT_YET |
| 496 | if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) |
| 497 | goto rx_dropped; |
| 498 | if (wds) { |
| 499 | skb->dev = dev = wds; |
| 500 | stats = hostap_get_stats(dev); |
| 501 | } |
| 502 | |
| 503 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 504 | (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 505 | IEEE80211_FCTL_FROMDS && ieee->stadev |
| 506 | && memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 507 | /* Frame from BSSID of the AP for which we are a client */ |
| 508 | skb->dev = dev = ieee->stadev; |
| 509 | stats = hostap_get_stats(dev); |
| 510 | from_assoc_ap = 1; |
| 511 | } |
| 512 | #endif |
| 513 | |
| 514 | dev->last_rx = jiffies; |
| 515 | |
| 516 | #ifdef NOT_YET |
| 517 | if ((ieee->iw_mode == IW_MODE_MASTER || |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 518 | ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 519 | switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, |
| 520 | wds != NULL)) { |
| 521 | case AP_RX_CONTINUE_NOT_AUTHORIZED: |
| 522 | frame_authorized = 0; |
| 523 | break; |
| 524 | case AP_RX_CONTINUE: |
| 525 | frame_authorized = 1; |
| 526 | break; |
| 527 | case AP_RX_DROP: |
| 528 | goto rx_dropped; |
| 529 | case AP_RX_EXIT: |
| 530 | goto rx_exit; |
| 531 | } |
| 532 | } |
| 533 | #endif |
| 534 | |
| 535 | /* Nullfunc frames may have PS-bit set, so they must be passed to |
| 536 | * hostap_handle_sta_rx() before being dropped here. */ |
| 537 | if (stype != IEEE80211_STYPE_DATA && |
| 538 | stype != IEEE80211_STYPE_DATA_CFACK && |
| 539 | stype != IEEE80211_STYPE_DATA_CFPOLL && |
| 540 | stype != IEEE80211_STYPE_DATA_CFACKPOLL) { |
| 541 | if (stype != IEEE80211_STYPE_NULLFUNC) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 542 | IEEE80211_DEBUG_DROP("RX: dropped data frame " |
| 543 | "with no data (type=0x%02x, " |
| 544 | "subtype=0x%02x, len=%d)\n", |
| 545 | type, stype, skb->len); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 546 | goto rx_dropped; |
| 547 | } |
| 548 | |
| 549 | /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ |
| 550 | |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 551 | if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 552 | (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) |
| 553 | goto rx_dropped; |
| 554 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 555 | hdr = (struct ieee80211_hdr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 556 | |
| 557 | /* skb: hdr + (possibly fragmented) plaintext payload */ |
| 558 | // PR: FIXME: hostap has additional conditions in the "if" below: |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 559 | // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 560 | if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { |
| 561 | int flen; |
| 562 | struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); |
| 563 | IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); |
| 564 | |
| 565 | if (!frag_skb) { |
| 566 | IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, |
| 567 | "Rx cannot get skb from fragment " |
| 568 | "cache (morefrag=%d seq=%u frag=%u)\n", |
| 569 | (fc & IEEE80211_FCTL_MOREFRAGS) != 0, |
| 570 | WLAN_GET_SEQ_SEQ(sc), frag); |
| 571 | goto rx_dropped; |
| 572 | } |
| 573 | |
| 574 | flen = skb->len; |
| 575 | if (frag != 0) |
| 576 | flen -= hdrlen; |
| 577 | |
| 578 | if (frag_skb->tail + flen > frag_skb->end) { |
| 579 | printk(KERN_WARNING "%s: host decrypted and " |
| 580 | "reassembled frame did not fit skb\n", |
| 581 | dev->name); |
| 582 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 583 | goto rx_dropped; |
| 584 | } |
| 585 | |
| 586 | if (frag == 0) { |
| 587 | /* copy first fragment (including full headers) into |
| 588 | * beginning of the fragment cache skb */ |
| 589 | memcpy(skb_put(frag_skb, flen), skb->data, flen); |
| 590 | } else { |
| 591 | /* append frame payload to the end of the fragment |
| 592 | * cache skb */ |
| 593 | memcpy(skb_put(frag_skb, flen), skb->data + hdrlen, |
| 594 | flen); |
| 595 | } |
| 596 | dev_kfree_skb_any(skb); |
| 597 | skb = NULL; |
| 598 | |
| 599 | if (fc & IEEE80211_FCTL_MOREFRAGS) { |
| 600 | /* more fragments expected - leave the skb in fragment |
| 601 | * cache for now; it will be delivered to upper layers |
| 602 | * after all fragments have been received */ |
| 603 | goto rx_exit; |
| 604 | } |
| 605 | |
| 606 | /* this was the last fragment and the frame will be |
| 607 | * delivered, so remove skb from fragment cache */ |
| 608 | skb = frag_skb; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 609 | hdr = (struct ieee80211_hdr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 610 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 611 | } |
| 612 | |
| 613 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still |
| 614 | * encrypted/authenticated */ |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 615 | if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 616 | ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) |
| 617 | goto rx_dropped; |
| 618 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 619 | hdr = (struct ieee80211_hdr *)skb->data; |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 620 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 621 | if ( /*ieee->ieee802_1x && */ |
| 622 | ieee80211_is_eapol_frame(ieee, skb)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 623 | /* pass unencrypted EAPOL frames even if encryption is |
| 624 | * configured */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 625 | } else { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 626 | IEEE80211_DEBUG_DROP("encryption configured, but RX " |
| 627 | "frame not encrypted (SA=" MAC_FMT |
| 628 | ")\n", MAC_ARG(hdr->addr2)); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 629 | goto rx_dropped; |
| 630 | } |
| 631 | } |
| 632 | |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 633 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 634 | !ieee80211_is_eapol_frame(ieee, skb)) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 635 | IEEE80211_DEBUG_DROP("dropped unencrypted RX data " |
| 636 | "frame from " MAC_FMT |
| 637 | " (drop_unencrypted=1)\n", |
| 638 | MAC_ARG(hdr->addr2)); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 639 | goto rx_dropped; |
| 640 | } |
| 641 | |
| 642 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
| 643 | |
| 644 | payload = skb->data + hdrlen; |
| 645 | ethertype = (payload[6] << 8) | payload[7]; |
| 646 | |
| 647 | #ifdef NOT_YET |
| 648 | /* If IEEE 802.1X is used, check whether the port is authorized to send |
| 649 | * the received frame. */ |
| 650 | if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) { |
| 651 | if (ethertype == ETH_P_PAE) { |
| 652 | printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n", |
| 653 | dev->name); |
| 654 | if (ieee->hostapd && ieee->apdev) { |
| 655 | /* Send IEEE 802.1X frames to the user |
| 656 | * space daemon for processing */ |
| 657 | prism2_rx_80211(ieee->apdev, skb, rx_stats, |
| 658 | PRISM2_RX_MGMT); |
| 659 | ieee->apdevstats.rx_packets++; |
| 660 | ieee->apdevstats.rx_bytes += skb->len; |
| 661 | goto rx_exit; |
| 662 | } |
| 663 | } else if (!frame_authorized) { |
| 664 | printk(KERN_DEBUG "%s: dropped frame from " |
| 665 | "unauthorized port (IEEE 802.1X): " |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 666 | "ethertype=0x%04x\n", dev->name, ethertype); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 667 | goto rx_dropped; |
| 668 | } |
| 669 | } |
| 670 | #endif |
| 671 | |
| 672 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 673 | if (skb->len - hdrlen >= 8 && |
| 674 | ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 && |
| 675 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 676 | memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 677 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 678 | * replace EtherType */ |
| 679 | skb_pull(skb, hdrlen + SNAP_SIZE); |
| 680 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 681 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 682 | } else { |
| 683 | u16 len; |
| 684 | /* Leave Ethernet header part of hdr and full payload */ |
| 685 | skb_pull(skb, hdrlen); |
| 686 | len = htons(skb->len); |
| 687 | memcpy(skb_push(skb, 2), &len, 2); |
| 688 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 689 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 690 | } |
| 691 | |
| 692 | #ifdef NOT_YET |
| 693 | if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 694 | IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 695 | /* Non-standard frame: get addr4 from its bogus location after |
| 696 | * the payload */ |
| 697 | memcpy(skb->data + ETH_ALEN, |
| 698 | skb->data + skb->len - ETH_ALEN, ETH_ALEN); |
| 699 | skb_trim(skb, skb->len - ETH_ALEN); |
| 700 | } |
| 701 | #endif |
| 702 | |
| 703 | stats->rx_packets++; |
| 704 | stats->rx_bytes += skb->len; |
| 705 | |
| 706 | #ifdef NOT_YET |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 707 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 708 | if (dst[0] & 0x01) { |
| 709 | /* copy multicast frame both to the higher layers and |
| 710 | * to the wireless media */ |
| 711 | ieee->ap->bridged_multicast++; |
| 712 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 713 | if (skb2 == NULL) |
| 714 | printk(KERN_DEBUG "%s: skb_clone failed for " |
| 715 | "multicast frame\n", dev->name); |
| 716 | } else if (hostap_is_sta_assoc(ieee->ap, dst)) { |
| 717 | /* send frame directly to the associated STA using |
| 718 | * wireless media and not passing to higher layers */ |
| 719 | ieee->ap->bridged_unicast++; |
| 720 | skb2 = skb; |
| 721 | skb = NULL; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | if (skb2 != NULL) { |
| 726 | /* send to wireless media */ |
| 727 | skb2->protocol = __constant_htons(ETH_P_802_3); |
| 728 | skb2->mac.raw = skb2->nh.raw = skb2->data; |
| 729 | /* skb2->nh.raw = skb2->data + ETH_HLEN; */ |
| 730 | skb2->dev = dev; |
| 731 | dev_queue_xmit(skb2); |
| 732 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 733 | #endif |
| 734 | |
| 735 | if (skb) { |
| 736 | skb->protocol = eth_type_trans(skb, dev); |
| 737 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 738 | skb->dev = dev; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 739 | skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 740 | netif_rx(skb); |
| 741 | } |
| 742 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 743 | rx_exit: |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 744 | #ifdef NOT_YET |
| 745 | if (sta) |
| 746 | hostap_handle_sta_release(sta); |
| 747 | #endif |
| 748 | return 1; |
| 749 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 750 | rx_dropped: |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 751 | stats->rx_dropped++; |
| 752 | |
| 753 | /* Returning 0 indicates to caller that we have not handled the SKB-- |
| 754 | * so it is still allocated and can be used again by underlying |
| 755 | * hardware as a DMA target */ |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 |
| 760 | |
| 761 | static inline int ieee80211_is_ofdm_rate(u8 rate) |
| 762 | { |
| 763 | switch (rate & ~IEEE80211_BASIC_RATE_MASK) { |
| 764 | case IEEE80211_OFDM_RATE_6MB: |
| 765 | case IEEE80211_OFDM_RATE_9MB: |
| 766 | case IEEE80211_OFDM_RATE_12MB: |
| 767 | case IEEE80211_OFDM_RATE_18MB: |
| 768 | case IEEE80211_OFDM_RATE_24MB: |
| 769 | case IEEE80211_OFDM_RATE_36MB: |
| 770 | case IEEE80211_OFDM_RATE_48MB: |
| 771 | case IEEE80211_OFDM_RATE_54MB: |
| 772 | return 1; |
| 773 | } |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 774 | return 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 775 | } |
| 776 | |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 777 | static inline int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 778 | *beacon, |
| 779 | struct ieee80211_network *network, |
| 780 | struct ieee80211_rx_stats *stats) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 781 | { |
| 782 | #ifdef CONFIG_IEEE80211_DEBUG |
| 783 | char rates_str[64]; |
| 784 | char *p; |
| 785 | #endif |
| 786 | struct ieee80211_info_element *info_element; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 787 | u16 left; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 788 | u8 i; |
| 789 | |
| 790 | /* Pull out fixed field data */ |
| 791 | memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 792 | network->capability = le16_to_cpu(beacon->capability); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 793 | network->last_scanned = jiffies; |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 794 | network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); |
| 795 | network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); |
| 796 | network->beacon_interval = le16_to_cpu(beacon->beacon_interval); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 797 | /* Where to pull this? beacon->listen_interval; */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 798 | network->listen_interval = 0x0A; |
| 799 | network->rates_len = network->rates_ex_len = 0; |
| 800 | network->last_associate = 0; |
| 801 | network->ssid_len = 0; |
| 802 | network->flags = 0; |
| 803 | network->atim_window = 0; |
| 804 | |
| 805 | if (stats->freq == IEEE80211_52GHZ_BAND) { |
| 806 | /* for A band (No DS info) */ |
| 807 | network->channel = stats->received_channel; |
| 808 | } else |
| 809 | network->flags |= NETWORK_HAS_CCK; |
| 810 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 811 | network->wpa_ie_len = 0; |
| 812 | network->rsn_ie_len = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 813 | |
James Ketrenos | 68e4e03 | 2005-09-13 17:37:22 -0500 | [diff] [blame] | 814 | info_element = beacon->info_element; |
James Ketrenos | 7b1fa54 | 2005-09-13 17:38:13 -0500 | [diff] [blame] | 815 | left = stats->len - sizeof(*beacon); |
| 816 | while (left >= sizeof(struct ieee80211_info_element)) { |
| 817 | if (sizeof(struct ieee80211_info_element) + info_element->len > |
| 818 | left) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 819 | IEEE80211_DEBUG_SCAN |
| 820 | ("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%Zd left=%d.\n", |
| 821 | info_element->len + |
| 822 | sizeof(struct ieee80211_info_element), left); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 823 | return 1; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 824 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 825 | |
| 826 | switch (info_element->id) { |
| 827 | case MFIE_TYPE_SSID: |
| 828 | if (ieee80211_is_empty_essid(info_element->data, |
| 829 | info_element->len)) { |
| 830 | network->flags |= NETWORK_EMPTY_ESSID; |
| 831 | break; |
| 832 | } |
| 833 | |
| 834 | network->ssid_len = min(info_element->len, |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 835 | (u8) IW_ESSID_MAX_SIZE); |
| 836 | memcpy(network->ssid, info_element->data, |
| 837 | network->ssid_len); |
| 838 | if (network->ssid_len < IW_ESSID_MAX_SIZE) |
| 839 | memset(network->ssid + network->ssid_len, 0, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 840 | IW_ESSID_MAX_SIZE - network->ssid_len); |
| 841 | |
| 842 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n", |
| 843 | network->ssid, network->ssid_len); |
| 844 | break; |
| 845 | |
| 846 | case MFIE_TYPE_RATES: |
| 847 | #ifdef CONFIG_IEEE80211_DEBUG |
| 848 | p = rates_str; |
| 849 | #endif |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 850 | network->rates_len = |
| 851 | min(info_element->len, MAX_RATES_LENGTH); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 852 | for (i = 0; i < network->rates_len; i++) { |
| 853 | network->rates[i] = info_element->data[i]; |
| 854 | #ifdef CONFIG_IEEE80211_DEBUG |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 855 | p += snprintf(p, |
| 856 | sizeof(rates_str) - (p - |
| 857 | rates_str), |
| 858 | "%02X ", network->rates[i]); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 859 | #endif |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 860 | if (ieee80211_is_ofdm_rate |
| 861 | (info_element->data[i])) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 862 | network->flags |= NETWORK_HAS_OFDM; |
| 863 | if (info_element->data[i] & |
| 864 | IEEE80211_BASIC_RATE_MASK) |
| 865 | network->flags &= |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 866 | ~NETWORK_HAS_CCK; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 867 | } |
| 868 | } |
| 869 | |
| 870 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n", |
| 871 | rates_str, network->rates_len); |
| 872 | break; |
| 873 | |
| 874 | case MFIE_TYPE_RATES_EX: |
| 875 | #ifdef CONFIG_IEEE80211_DEBUG |
| 876 | p = rates_str; |
| 877 | #endif |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 878 | network->rates_ex_len = |
| 879 | min(info_element->len, MAX_RATES_EX_LENGTH); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 880 | for (i = 0; i < network->rates_ex_len; i++) { |
| 881 | network->rates_ex[i] = info_element->data[i]; |
| 882 | #ifdef CONFIG_IEEE80211_DEBUG |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 883 | p += snprintf(p, |
| 884 | sizeof(rates_str) - (p - |
| 885 | rates_str), |
| 886 | "%02X ", network->rates[i]); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 887 | #endif |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 888 | if (ieee80211_is_ofdm_rate |
| 889 | (info_element->data[i])) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 890 | network->flags |= NETWORK_HAS_OFDM; |
| 891 | if (info_element->data[i] & |
| 892 | IEEE80211_BASIC_RATE_MASK) |
| 893 | network->flags &= |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 894 | ~NETWORK_HAS_CCK; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 895 | } |
| 896 | } |
| 897 | |
| 898 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n", |
| 899 | rates_str, network->rates_ex_len); |
| 900 | break; |
| 901 | |
| 902 | case MFIE_TYPE_DS_SET: |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 903 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n", |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 904 | info_element->data[0]); |
| 905 | if (stats->freq == IEEE80211_24GHZ_BAND) |
| 906 | network->channel = info_element->data[0]; |
| 907 | break; |
| 908 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 909 | case MFIE_TYPE_FH_SET: |
| 910 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 911 | break; |
| 912 | |
| 913 | case MFIE_TYPE_CF_SET: |
| 914 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n"); |
| 915 | break; |
| 916 | |
| 917 | case MFIE_TYPE_TIM: |
| 918 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_TIM: ignored\n"); |
| 919 | break; |
| 920 | |
| 921 | case MFIE_TYPE_IBSS_SET: |
| 922 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n"); |
| 923 | break; |
| 924 | |
| 925 | case MFIE_TYPE_CHALLENGE: |
| 926 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n"); |
| 927 | break; |
| 928 | |
| 929 | case MFIE_TYPE_GENERIC: |
| 930 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n", |
| 931 | info_element->len); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 932 | if (info_element->len >= 4 && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 933 | info_element->data[0] == 0x00 && |
| 934 | info_element->data[1] == 0x50 && |
| 935 | info_element->data[2] == 0xf2 && |
| 936 | info_element->data[3] == 0x01) { |
| 937 | network->wpa_ie_len = min(info_element->len + 2, |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 938 | MAX_WPA_IE_LEN); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 939 | memcpy(network->wpa_ie, info_element, |
| 940 | network->wpa_ie_len); |
| 941 | } |
| 942 | break; |
| 943 | |
| 944 | case MFIE_TYPE_RSN: |
| 945 | IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n", |
| 946 | info_element->len); |
| 947 | network->rsn_ie_len = min(info_element->len + 2, |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 948 | MAX_WPA_IE_LEN); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 949 | memcpy(network->rsn_ie, info_element, |
| 950 | network->rsn_ie_len); |
| 951 | break; |
| 952 | |
| 953 | default: |
| 954 | IEEE80211_DEBUG_SCAN("unsupported IE %d\n", |
| 955 | info_element->id); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 956 | break; |
| 957 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 958 | |
James Ketrenos | 7b1fa54 | 2005-09-13 17:38:13 -0500 | [diff] [blame] | 959 | left -= sizeof(struct ieee80211_info_element) + |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 960 | info_element->len; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 961 | info_element = (struct ieee80211_info_element *) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 962 | &info_element->data[info_element->len]; |
| 963 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 964 | |
| 965 | network->mode = 0; |
| 966 | if (stats->freq == IEEE80211_52GHZ_BAND) |
| 967 | network->mode = IEEE_A; |
| 968 | else { |
| 969 | if (network->flags & NETWORK_HAS_OFDM) |
| 970 | network->mode |= IEEE_G; |
| 971 | if (network->flags & NETWORK_HAS_CCK) |
| 972 | network->mode |= IEEE_B; |
| 973 | } |
| 974 | |
| 975 | if (network->mode == 0) { |
| 976 | IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' " |
| 977 | "network.\n", |
| 978 | escape_essid(network->ssid, |
| 979 | network->ssid_len), |
| 980 | MAC_ARG(network->bssid)); |
| 981 | return 1; |
| 982 | } |
| 983 | |
| 984 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) |
| 985 | network->flags |= NETWORK_EMPTY_ESSID; |
| 986 | |
| 987 | memcpy(&network->stats, stats, sizeof(network->stats)); |
| 988 | |
| 989 | return 0; |
| 990 | } |
| 991 | |
| 992 | static inline int is_same_network(struct ieee80211_network *src, |
| 993 | struct ieee80211_network *dst) |
| 994 | { |
| 995 | /* A network is only a duplicate if the channel, BSSID, and ESSID |
| 996 | * all match. We treat all <hidden> with the same BSSID and channel |
| 997 | * as one network */ |
| 998 | return ((src->ssid_len == dst->ssid_len) && |
| 999 | (src->channel == dst->channel) && |
| 1000 | !memcmp(src->bssid, dst->bssid, ETH_ALEN) && |
| 1001 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); |
| 1002 | } |
| 1003 | |
| 1004 | static inline void update_network(struct ieee80211_network *dst, |
| 1005 | struct ieee80211_network *src) |
| 1006 | { |
| 1007 | memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); |
| 1008 | dst->capability = src->capability; |
| 1009 | memcpy(dst->rates, src->rates, src->rates_len); |
| 1010 | dst->rates_len = src->rates_len; |
| 1011 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); |
| 1012 | dst->rates_ex_len = src->rates_ex_len; |
| 1013 | |
| 1014 | dst->mode = src->mode; |
| 1015 | dst->flags = src->flags; |
| 1016 | dst->time_stamp[0] = src->time_stamp[0]; |
| 1017 | dst->time_stamp[1] = src->time_stamp[1]; |
| 1018 | |
| 1019 | dst->beacon_interval = src->beacon_interval; |
| 1020 | dst->listen_interval = src->listen_interval; |
| 1021 | dst->atim_window = src->atim_window; |
| 1022 | |
| 1023 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); |
| 1024 | dst->wpa_ie_len = src->wpa_ie_len; |
| 1025 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); |
| 1026 | dst->rsn_ie_len = src->rsn_ie_len; |
| 1027 | |
| 1028 | dst->last_scanned = jiffies; |
| 1029 | /* dst->last_associate is not overwritten */ |
| 1030 | } |
| 1031 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1032 | static inline void ieee80211_process_probe_response(struct ieee80211_device |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 1033 | *ieee, struct |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1034 | ieee80211_probe_response |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 1035 | *beacon, struct ieee80211_rx_stats |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1036 | *stats) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1037 | { |
| 1038 | struct ieee80211_network network; |
| 1039 | struct ieee80211_network *target; |
| 1040 | struct ieee80211_network *oldest = NULL; |
| 1041 | #ifdef CONFIG_IEEE80211_DEBUG |
James Ketrenos | 68e4e03 | 2005-09-13 17:37:22 -0500 | [diff] [blame] | 1042 | struct ieee80211_info_element *info_element = beacon->info_element; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1043 | #endif |
| 1044 | unsigned long flags; |
| 1045 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1046 | IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT |
| 1047 | "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", |
| 1048 | escape_essid(info_element->data, |
| 1049 | info_element->len), |
| 1050 | MAC_ARG(beacon->header.addr3), |
| 1051 | (beacon->capability & (1 << 0xf)) ? '1' : '0', |
| 1052 | (beacon->capability & (1 << 0xe)) ? '1' : '0', |
| 1053 | (beacon->capability & (1 << 0xd)) ? '1' : '0', |
| 1054 | (beacon->capability & (1 << 0xc)) ? '1' : '0', |
| 1055 | (beacon->capability & (1 << 0xb)) ? '1' : '0', |
| 1056 | (beacon->capability & (1 << 0xa)) ? '1' : '0', |
| 1057 | (beacon->capability & (1 << 0x9)) ? '1' : '0', |
| 1058 | (beacon->capability & (1 << 0x8)) ? '1' : '0', |
| 1059 | (beacon->capability & (1 << 0x7)) ? '1' : '0', |
| 1060 | (beacon->capability & (1 << 0x6)) ? '1' : '0', |
| 1061 | (beacon->capability & (1 << 0x5)) ? '1' : '0', |
| 1062 | (beacon->capability & (1 << 0x4)) ? '1' : '0', |
| 1063 | (beacon->capability & (1 << 0x3)) ? '1' : '0', |
| 1064 | (beacon->capability & (1 << 0x2)) ? '1' : '0', |
| 1065 | (beacon->capability & (1 << 0x1)) ? '1' : '0', |
| 1066 | (beacon->capability & (1 << 0x0)) ? '1' : '0'); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1067 | |
| 1068 | if (ieee80211_network_init(ieee, beacon, &network, stats)) { |
| 1069 | IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n", |
| 1070 | escape_essid(info_element->data, |
| 1071 | info_element->len), |
| 1072 | MAC_ARG(beacon->header.addr3), |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1073 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1074 | (beacon->header. |
| 1075 | frame_ctl)) == |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1076 | IEEE80211_STYPE_PROBE_RESP ? |
| 1077 | "PROBE RESPONSE" : "BEACON"); |
| 1078 | return; |
| 1079 | } |
| 1080 | |
| 1081 | /* The network parsed correctly -- so now we scan our known networks |
| 1082 | * to see if we can find it in our list. |
| 1083 | * |
| 1084 | * NOTE: This search is definitely not optimized. Once its doing |
| 1085 | * the "right thing" we'll optimize it for efficiency if |
| 1086 | * necessary */ |
| 1087 | |
| 1088 | /* Search for this entry in the list and update it if it is |
| 1089 | * already there. */ |
| 1090 | |
| 1091 | spin_lock_irqsave(&ieee->lock, flags); |
| 1092 | |
| 1093 | list_for_each_entry(target, &ieee->network_list, list) { |
| 1094 | if (is_same_network(target, &network)) |
| 1095 | break; |
| 1096 | |
| 1097 | if ((oldest == NULL) || |
| 1098 | (target->last_scanned < oldest->last_scanned)) |
| 1099 | oldest = target; |
| 1100 | } |
| 1101 | |
| 1102 | /* If we didn't find a match, then get a new network slot to initialize |
| 1103 | * with this beacon's information */ |
| 1104 | if (&target->list == &ieee->network_list) { |
| 1105 | if (list_empty(&ieee->network_free_list)) { |
| 1106 | /* If there are no more slots, expire the oldest */ |
| 1107 | list_del(&oldest->list); |
| 1108 | target = oldest; |
| 1109 | IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from " |
| 1110 | "network list.\n", |
| 1111 | escape_essid(target->ssid, |
| 1112 | target->ssid_len), |
| 1113 | MAC_ARG(target->bssid)); |
| 1114 | } else { |
| 1115 | /* Otherwise just pull from the free list */ |
| 1116 | target = list_entry(ieee->network_free_list.next, |
| 1117 | struct ieee80211_network, list); |
| 1118 | list_del(ieee->network_free_list.next); |
| 1119 | } |
| 1120 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1121 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1122 | IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n", |
| 1123 | escape_essid(network.ssid, |
| 1124 | network.ssid_len), |
| 1125 | MAC_ARG(network.bssid), |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1126 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1127 | (beacon->header. |
| 1128 | frame_ctl)) == |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1129 | IEEE80211_STYPE_PROBE_RESP ? |
| 1130 | "PROBE RESPONSE" : "BEACON"); |
| 1131 | #endif |
| 1132 | memcpy(target, &network, sizeof(*target)); |
| 1133 | list_add_tail(&target->list, &ieee->network_list); |
| 1134 | } else { |
| 1135 | IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n", |
| 1136 | escape_essid(target->ssid, |
| 1137 | target->ssid_len), |
| 1138 | MAC_ARG(target->bssid), |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1139 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1140 | (beacon->header. |
| 1141 | frame_ctl)) == |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1142 | IEEE80211_STYPE_PROBE_RESP ? |
| 1143 | "PROBE RESPONSE" : "BEACON"); |
| 1144 | update_network(target, &network); |
| 1145 | } |
| 1146 | |
| 1147 | spin_unlock_irqrestore(&ieee->lock, flags); |
| 1148 | } |
| 1149 | |
| 1150 | void ieee80211_rx_mgt(struct ieee80211_device *ieee, |
| 1151 | struct ieee80211_hdr *header, |
| 1152 | struct ieee80211_rx_stats *stats) |
| 1153 | { |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1154 | switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1155 | case IEEE80211_STYPE_ASSOC_RESP: |
| 1156 | IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1157 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1158 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1159 | break; |
| 1160 | |
| 1161 | case IEEE80211_STYPE_REASSOC_RESP: |
| 1162 | IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1163 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1164 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1165 | break; |
| 1166 | |
| 1167 | case IEEE80211_STYPE_PROBE_RESP: |
| 1168 | IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1169 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1170 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1171 | IEEE80211_DEBUG_SCAN("Probe response\n"); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1172 | ieee80211_process_probe_response(ieee, |
| 1173 | (struct |
| 1174 | ieee80211_probe_response *) |
| 1175 | header, stats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1176 | break; |
| 1177 | |
| 1178 | case IEEE80211_STYPE_BEACON: |
| 1179 | IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1180 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1181 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1182 | IEEE80211_DEBUG_SCAN("Beacon\n"); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1183 | ieee80211_process_probe_response(ieee, |
| 1184 | (struct |
| 1185 | ieee80211_probe_response *) |
| 1186 | header, stats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1187 | break; |
| 1188 | |
| 1189 | default: |
| 1190 | IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1191 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1192 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1193 | IEEE80211_WARNING("%s: Unknown management packet: %d\n", |
| 1194 | ieee->dev->name, |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1195 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1196 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1197 | break; |
| 1198 | } |
| 1199 | } |
| 1200 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1201 | EXPORT_SYMBOL(ieee80211_rx_mgt); |
| 1202 | EXPORT_SYMBOL(ieee80211_rx); |