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> |
James Ketrenos | ebeaddc | 2005-09-21 11:58:43 -0500 | [diff] [blame] | 8 | * Copyright (c) 2004-2005, Intel Corporation |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 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> |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 31 | #include <linux/wireless.h> |
| 32 | #include <linux/etherdevice.h> |
| 33 | #include <asm/uaccess.h> |
| 34 | #include <linux/ctype.h> |
| 35 | |
| 36 | #include <net/ieee80211.h> |
| 37 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 38 | static void ieee80211_monitor_rx(struct ieee80211_device *ieee, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 39 | struct sk_buff *skb, |
| 40 | struct ieee80211_rx_stats *rx_stats) |
| 41 | { |
| 42 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 43 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 44 | |
| 45 | skb->dev = ieee->dev; |
| 46 | skb->mac.raw = skb->data; |
| 47 | skb_pull(skb, ieee80211_get_hdrlen(fc)); |
| 48 | skb->pkt_type = PACKET_OTHERHOST; |
| 49 | skb->protocol = __constant_htons(ETH_P_80211_RAW); |
| 50 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 51 | netif_rx(skb); |
| 52 | } |
| 53 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 54 | /* Called only as a tasklet (software IRQ) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 55 | static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct |
| 56 | ieee80211_device |
| 57 | *ieee, |
| 58 | unsigned int seq, |
| 59 | unsigned int frag, |
| 60 | u8 * src, |
| 61 | u8 * dst) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 62 | { |
| 63 | struct ieee80211_frag_entry *entry; |
| 64 | int i; |
| 65 | |
| 66 | for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { |
| 67 | entry = &ieee->frag_cache[i]; |
| 68 | if (entry->skb != NULL && |
| 69 | time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 70 | IEEE80211_DEBUG_FRAG("expiring fragment cache entry " |
| 71 | "seq=%u last_frag=%u\n", |
| 72 | entry->seq, entry->last_frag); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 73 | dev_kfree_skb_any(entry->skb); |
| 74 | entry->skb = NULL; |
| 75 | } |
| 76 | |
| 77 | if (entry->skb != NULL && entry->seq == seq && |
| 78 | (entry->last_frag + 1 == frag || frag == -1) && |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 79 | !compare_ether_addr(entry->src_addr, src) && |
| 80 | !compare_ether_addr(entry->dst_addr, dst)) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 81 | return entry; |
| 82 | } |
| 83 | |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | /* Called only as a tasklet (software IRQ) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 88 | static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee, |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 89 | struct ieee80211_hdr_4addr *hdr) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 90 | { |
| 91 | struct sk_buff *skb = NULL; |
| 92 | u16 sc; |
| 93 | unsigned int frag, seq; |
| 94 | struct ieee80211_frag_entry *entry; |
| 95 | |
| 96 | sc = le16_to_cpu(hdr->seq_ctl); |
| 97 | frag = WLAN_GET_SEQ_FRAG(sc); |
| 98 | seq = WLAN_GET_SEQ_SEQ(sc); |
| 99 | |
| 100 | if (frag == 0) { |
| 101 | /* Reserve enough space to fit maximum frame length */ |
| 102 | skb = dev_alloc_skb(ieee->dev->mtu + |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 103 | sizeof(struct ieee80211_hdr_4addr) + |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 104 | 8 /* LLC */ + |
| 105 | 2 /* alignment */ + |
| 106 | 8 /* WEP */ + ETH_ALEN /* WDS */ ); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 107 | if (skb == NULL) |
| 108 | return NULL; |
| 109 | |
| 110 | entry = &ieee->frag_cache[ieee->frag_next_idx]; |
| 111 | ieee->frag_next_idx++; |
| 112 | if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN) |
| 113 | ieee->frag_next_idx = 0; |
| 114 | |
| 115 | if (entry->skb != NULL) |
| 116 | dev_kfree_skb_any(entry->skb); |
| 117 | |
| 118 | entry->first_frag_time = jiffies; |
| 119 | entry->seq = seq; |
| 120 | entry->last_frag = frag; |
| 121 | entry->skb = skb; |
| 122 | memcpy(entry->src_addr, hdr->addr2, ETH_ALEN); |
| 123 | memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN); |
| 124 | } else { |
| 125 | /* received a fragment of a frame for which the head fragment |
| 126 | * should have already been received */ |
| 127 | entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2, |
| 128 | hdr->addr1); |
| 129 | if (entry != NULL) { |
| 130 | entry->last_frag = frag; |
| 131 | skb = entry->skb; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | return skb; |
| 136 | } |
| 137 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 138 | /* Called only as a tasklet (software IRQ) */ |
| 139 | static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 140 | struct ieee80211_hdr_4addr *hdr) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 141 | { |
| 142 | u16 sc; |
| 143 | unsigned int seq; |
| 144 | struct ieee80211_frag_entry *entry; |
| 145 | |
| 146 | sc = le16_to_cpu(hdr->seq_ctl); |
| 147 | seq = WLAN_GET_SEQ_SEQ(sc); |
| 148 | |
| 149 | entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2, |
| 150 | hdr->addr1); |
| 151 | |
| 152 | if (entry == NULL) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 153 | IEEE80211_DEBUG_FRAG("could not invalidate fragment cache " |
| 154 | "entry (seq=%u)\n", seq); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 155 | return -1; |
| 156 | } |
| 157 | |
| 158 | entry->skb = NULL; |
| 159 | return 0; |
| 160 | } |
| 161 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 162 | #ifdef NOT_YET |
| 163 | /* ieee80211_rx_frame_mgtmt |
| 164 | * |
| 165 | * Responsible for handling management control frames |
| 166 | * |
| 167 | * Called by ieee80211_rx */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 168 | static int |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 169 | ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 170 | struct ieee80211_rx_stats *rx_stats, u16 type, |
| 171 | u16 stype) |
| 172 | { |
| 173 | if (ieee->iw_mode == IW_MODE_MASTER) { |
| 174 | printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", |
| 175 | ieee->dev->name); |
| 176 | return 0; |
| 177 | /* |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 178 | hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 179 | skb->data);*/ |
| 180 | } |
| 181 | |
| 182 | if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) { |
| 183 | if (stype == WLAN_FC_STYPE_BEACON && |
| 184 | ieee->iw_mode == IW_MODE_MASTER) { |
| 185 | struct sk_buff *skb2; |
| 186 | /* Process beacon frames also in kernel driver to |
| 187 | * update STA(AP) table statistics */ |
| 188 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 189 | if (skb2) |
| 190 | hostap_rx(skb2->dev, skb2, rx_stats); |
| 191 | } |
| 192 | |
| 193 | /* send management frames to the user space daemon for |
| 194 | * processing */ |
| 195 | ieee->apdevstats.rx_packets++; |
| 196 | ieee->apdevstats.rx_bytes += skb->len; |
| 197 | prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); |
| 198 | return 0; |
| 199 | } |
| 200 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 201 | if (ieee->iw_mode == IW_MODE_MASTER) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 202 | if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { |
| 203 | printk(KERN_DEBUG "%s: unknown management frame " |
| 204 | "(type=0x%02x, stype=0x%02x) dropped\n", |
| 205 | skb->dev->name, type, stype); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | hostap_rx(skb->dev, skb, rx_stats); |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " |
| 214 | "received in non-Host AP mode\n", skb->dev->name); |
| 215 | return -1; |
| 216 | } |
| 217 | #endif |
| 218 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 219 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| 220 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 221 | static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| 222 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 223 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| 224 | static unsigned char bridge_tunnel_header[] = |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 225 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 226 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
| 227 | |
| 228 | /* Called by ieee80211_rx_frame_decrypt */ |
| 229 | static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, |
| 230 | struct sk_buff *skb) |
| 231 | { |
| 232 | struct net_device *dev = ieee->dev; |
| 233 | u16 fc, ethertype; |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 234 | struct ieee80211_hdr_3addr *hdr; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 235 | u8 *pos; |
| 236 | |
| 237 | if (skb->len < 24) |
| 238 | return 0; |
| 239 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 240 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 241 | fc = le16_to_cpu(hdr->frame_ctl); |
| 242 | |
| 243 | /* check that the frame is unicast frame to us */ |
| 244 | if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 245 | IEEE80211_FCTL_TODS && |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 246 | !compare_ether_addr(hdr->addr1, dev->dev_addr) && |
| 247 | !compare_ether_addr(hdr->addr3, dev->dev_addr)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 248 | /* ToDS frame with own addr BSSID and DA */ |
| 249 | } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 250 | IEEE80211_FCTL_FROMDS && |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 251 | !compare_ether_addr(hdr->addr1, dev->dev_addr)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 252 | /* FromDS frame with own addr as DA */ |
| 253 | } else |
| 254 | return 0; |
| 255 | |
| 256 | if (skb->len < 24 + 8) |
| 257 | return 0; |
| 258 | |
| 259 | /* check for port access entity Ethernet type */ |
| 260 | pos = skb->data + 24; |
| 261 | ethertype = (pos[6] << 8) | pos[7]; |
| 262 | if (ethertype == ETH_P_PAE) |
| 263 | return 1; |
| 264 | |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 269 | static int |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 270 | ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 271 | struct ieee80211_crypt_data *crypt) |
| 272 | { |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 273 | struct ieee80211_hdr_3addr *hdr; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 274 | int res, hdrlen; |
| 275 | |
| 276 | if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) |
| 277 | return 0; |
| 278 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 279 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 280 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 281 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 282 | atomic_inc(&crypt->refcnt); |
| 283 | res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); |
| 284 | atomic_dec(&crypt->refcnt); |
| 285 | if (res < 0) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 286 | IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT |
| 287 | ") res=%d\n", MAC_ARG(hdr->addr2), res); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 288 | if (res == -2) |
| 289 | IEEE80211_DEBUG_DROP("Decryption failed ICV " |
| 290 | "mismatch (key %d)\n", |
| 291 | skb->data[hdrlen + 3] >> 6); |
| 292 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 293 | return -1; |
| 294 | } |
| 295 | |
| 296 | return res; |
| 297 | } |
| 298 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 299 | /* Called only as a tasklet (software IRQ), by ieee80211_rx */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 300 | static int |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 301 | ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, |
| 302 | struct sk_buff *skb, int keyidx, |
| 303 | struct ieee80211_crypt_data *crypt) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 304 | { |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 305 | struct ieee80211_hdr_3addr *hdr; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 306 | int res, hdrlen; |
| 307 | |
| 308 | if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) |
| 309 | return 0; |
| 310 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 311 | hdr = (struct ieee80211_hdr_3addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 312 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); |
| 313 | |
| 314 | atomic_inc(&crypt->refcnt); |
| 315 | res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); |
| 316 | atomic_dec(&crypt->refcnt); |
| 317 | if (res < 0) { |
| 318 | printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed" |
| 319 | " (SA=" MAC_FMT " keyidx=%d)\n", |
| 320 | ieee->dev->name, MAC_ARG(hdr->addr2), keyidx); |
| 321 | return -1; |
| 322 | } |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 327 | /* All received frames are sent to this function. @skb contains the frame in |
| 328 | * IEEE 802.11 format, i.e., in the format it was sent over air. |
| 329 | * This function is called only as a tasklet (software IRQ). */ |
| 330 | int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, |
| 331 | struct ieee80211_rx_stats *rx_stats) |
| 332 | { |
| 333 | struct net_device *dev = ieee->dev; |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 334 | struct ieee80211_hdr_4addr *hdr; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 335 | size_t hdrlen; |
| 336 | u16 fc, type, stype, sc; |
| 337 | struct net_device_stats *stats; |
| 338 | unsigned int frag; |
| 339 | u8 *payload; |
| 340 | u16 ethertype; |
| 341 | #ifdef NOT_YET |
| 342 | struct net_device *wds = NULL; |
| 343 | struct sk_buff *skb2 = NULL; |
| 344 | struct net_device *wds = NULL; |
| 345 | int frame_authorized = 0; |
| 346 | int from_assoc_ap = 0; |
| 347 | void *sta = NULL; |
| 348 | #endif |
| 349 | u8 dst[ETH_ALEN]; |
| 350 | u8 src[ETH_ALEN]; |
| 351 | struct ieee80211_crypt_data *crypt = NULL; |
| 352 | int keyidx = 0; |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 353 | int can_be_decrypted = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 354 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 355 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 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 | |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 412 | can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) || |
| 413 | is_broadcast_ether_addr(hdr->addr2)) ? |
| 414 | ieee->host_mc_decrypt : ieee->host_decrypt; |
| 415 | |
| 416 | if (can_be_decrypted) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 417 | int idx = 0; |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 418 | if (skb->len >= hdrlen + 3) { |
| 419 | /* Top two-bits of byte 3 are the key index */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 420 | idx = skb->data[hdrlen + 3] >> 6; |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | /* ieee->crypt[] is WEP_KEY (4) in length. Given that idx |
| 424 | * is only allowed 2-bits of storage, no value of idx can |
| 425 | * be provided via above code that would result in idx |
| 426 | * being out of range */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 427 | crypt = ieee->crypt[idx]; |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 428 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 429 | #ifdef NOT_YET |
| 430 | sta = NULL; |
| 431 | |
| 432 | /* Use station specific key to override default keys if the |
| 433 | * receiver address is a unicast address ("individual RA"). If |
| 434 | * bcrx_sta_key parameter is set, station specific key is used |
| 435 | * even with broad/multicast targets (this is against IEEE |
| 436 | * 802.11, but makes it easier to use different keys with |
| 437 | * stations that do not support WEP key mapping). */ |
| 438 | |
| 439 | if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 440 | (void)hostap_handle_sta_crypto(local, hdr, &crypt, |
| 441 | &sta); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 442 | #endif |
| 443 | |
| 444 | /* allow NULL decrypt to indicate an station specific override |
| 445 | * for default encryption */ |
| 446 | if (crypt && (crypt->ops == NULL || |
| 447 | crypt->ops->decrypt_mpdu == NULL)) |
| 448 | crypt = NULL; |
| 449 | |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 450 | if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 451 | /* This seems to be triggered by some (multicast?) |
| 452 | * frames from other than current BSS, so just drop the |
| 453 | * frames silently instead of filling system log with |
| 454 | * these reports. */ |
| 455 | IEEE80211_DEBUG_DROP("Decryption failed (not set)" |
| 456 | " (SA=" MAC_FMT ")\n", |
| 457 | MAC_ARG(hdr->addr2)); |
| 458 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 459 | goto rx_dropped; |
| 460 | } |
| 461 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 462 | #ifdef NOT_YET |
| 463 | if (type != WLAN_FC_TYPE_DATA) { |
| 464 | if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH && |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 465 | fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt && |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 466 | (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 467 | printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth " |
| 468 | "from " MAC_FMT "\n", dev->name, |
| 469 | MAC_ARG(hdr->addr2)); |
| 470 | /* TODO: could inform hostapd about this so that it |
| 471 | * could send auth failure report */ |
| 472 | goto rx_dropped; |
| 473 | } |
| 474 | |
| 475 | if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) |
| 476 | goto rx_dropped; |
| 477 | else |
| 478 | goto rx_exit; |
| 479 | } |
| 480 | #endif |
| 481 | |
| 482 | /* Data frame - extract src/dst addresses */ |
Jiri Benc | 286d974 | 2005-05-24 15:10:18 +0200 | [diff] [blame] | 483 | if (skb->len < IEEE80211_3ADDR_LEN) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 484 | goto rx_dropped; |
| 485 | |
| 486 | switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { |
| 487 | case IEEE80211_FCTL_FROMDS: |
| 488 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 489 | memcpy(src, hdr->addr3, ETH_ALEN); |
| 490 | break; |
| 491 | case IEEE80211_FCTL_TODS: |
| 492 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 493 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 494 | break; |
| 495 | case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: |
Jiri Benc | 286d974 | 2005-05-24 15:10:18 +0200 | [diff] [blame] | 496 | if (skb->len < IEEE80211_4ADDR_LEN) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 497 | goto rx_dropped; |
| 498 | memcpy(dst, hdr->addr3, ETH_ALEN); |
| 499 | memcpy(src, hdr->addr4, ETH_ALEN); |
| 500 | break; |
| 501 | case 0: |
| 502 | memcpy(dst, hdr->addr1, ETH_ALEN); |
| 503 | memcpy(src, hdr->addr2, ETH_ALEN); |
| 504 | break; |
| 505 | } |
| 506 | |
| 507 | #ifdef NOT_YET |
| 508 | if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) |
| 509 | goto rx_dropped; |
| 510 | if (wds) { |
| 511 | skb->dev = dev = wds; |
| 512 | stats = hostap_get_stats(dev); |
| 513 | } |
| 514 | |
| 515 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 516 | (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
| 517 | IEEE80211_FCTL_FROMDS && ieee->stadev |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 518 | && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 519 | /* Frame from BSSID of the AP for which we are a client */ |
| 520 | skb->dev = dev = ieee->stadev; |
| 521 | stats = hostap_get_stats(dev); |
| 522 | from_assoc_ap = 1; |
| 523 | } |
| 524 | #endif |
| 525 | |
| 526 | dev->last_rx = jiffies; |
| 527 | |
| 528 | #ifdef NOT_YET |
| 529 | if ((ieee->iw_mode == IW_MODE_MASTER || |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 530 | ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 531 | switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, |
| 532 | wds != NULL)) { |
| 533 | case AP_RX_CONTINUE_NOT_AUTHORIZED: |
| 534 | frame_authorized = 0; |
| 535 | break; |
| 536 | case AP_RX_CONTINUE: |
| 537 | frame_authorized = 1; |
| 538 | break; |
| 539 | case AP_RX_DROP: |
| 540 | goto rx_dropped; |
| 541 | case AP_RX_EXIT: |
| 542 | goto rx_exit; |
| 543 | } |
| 544 | } |
| 545 | #endif |
| 546 | |
| 547 | /* Nullfunc frames may have PS-bit set, so they must be passed to |
| 548 | * hostap_handle_sta_rx() before being dropped here. */ |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 549 | |
| 550 | stype &= ~IEEE80211_STYPE_QOS_DATA; |
| 551 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 552 | if (stype != IEEE80211_STYPE_DATA && |
| 553 | stype != IEEE80211_STYPE_DATA_CFACK && |
| 554 | stype != IEEE80211_STYPE_DATA_CFPOLL && |
| 555 | stype != IEEE80211_STYPE_DATA_CFACKPOLL) { |
| 556 | if (stype != IEEE80211_STYPE_NULLFUNC) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 557 | IEEE80211_DEBUG_DROP("RX: dropped data frame " |
| 558 | "with no data (type=0x%02x, " |
| 559 | "subtype=0x%02x, len=%d)\n", |
| 560 | type, stype, skb->len); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 561 | goto rx_dropped; |
| 562 | } |
| 563 | |
| 564 | /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ |
| 565 | |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 566 | if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 567 | (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) |
| 568 | goto rx_dropped; |
| 569 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 570 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 571 | |
| 572 | /* skb: hdr + (possibly fragmented) plaintext payload */ |
| 573 | // PR: FIXME: hostap has additional conditions in the "if" below: |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 574 | // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) && |
Denis Vlasenko | 9eafe76 | 2006-01-22 13:57:10 +0200 | [diff] [blame] | 575 | if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 576 | int flen; |
| 577 | struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); |
| 578 | IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); |
| 579 | |
| 580 | if (!frag_skb) { |
| 581 | IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, |
| 582 | "Rx cannot get skb from fragment " |
| 583 | "cache (morefrag=%d seq=%u frag=%u)\n", |
| 584 | (fc & IEEE80211_FCTL_MOREFRAGS) != 0, |
| 585 | WLAN_GET_SEQ_SEQ(sc), frag); |
| 586 | goto rx_dropped; |
| 587 | } |
| 588 | |
| 589 | flen = skb->len; |
| 590 | if (frag != 0) |
| 591 | flen -= hdrlen; |
| 592 | |
| 593 | if (frag_skb->tail + flen > frag_skb->end) { |
| 594 | printk(KERN_WARNING "%s: host decrypted and " |
| 595 | "reassembled frame did not fit skb\n", |
| 596 | dev->name); |
| 597 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 598 | goto rx_dropped; |
| 599 | } |
| 600 | |
| 601 | if (frag == 0) { |
| 602 | /* copy first fragment (including full headers) into |
| 603 | * beginning of the fragment cache skb */ |
| 604 | memcpy(skb_put(frag_skb, flen), skb->data, flen); |
| 605 | } else { |
| 606 | /* append frame payload to the end of the fragment |
| 607 | * cache skb */ |
| 608 | memcpy(skb_put(frag_skb, flen), skb->data + hdrlen, |
| 609 | flen); |
| 610 | } |
| 611 | dev_kfree_skb_any(skb); |
| 612 | skb = NULL; |
| 613 | |
| 614 | if (fc & IEEE80211_FCTL_MOREFRAGS) { |
| 615 | /* more fragments expected - leave the skb in fragment |
| 616 | * cache for now; it will be delivered to upper layers |
| 617 | * after all fragments have been received */ |
| 618 | goto rx_exit; |
| 619 | } |
| 620 | |
| 621 | /* this was the last fragment and the frame will be |
| 622 | * delivered, so remove skb from fragment cache */ |
| 623 | skb = frag_skb; |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 624 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 625 | ieee80211_frag_cache_invalidate(ieee, hdr); |
| 626 | } |
| 627 | |
| 628 | /* skb: hdr + (possible reassembled) full MSDU payload; possibly still |
| 629 | * encrypted/authenticated */ |
Zhu Yi | b6daa25 | 2006-01-19 16:20:42 +0800 | [diff] [blame] | 630 | if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 631 | ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) |
| 632 | goto rx_dropped; |
| 633 | |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 634 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 635 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 636 | if ( /*ieee->ieee802_1x && */ |
| 637 | ieee80211_is_eapol_frame(ieee, skb)) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 638 | /* pass unencrypted EAPOL frames even if encryption is |
| 639 | * configured */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 640 | } else { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 641 | IEEE80211_DEBUG_DROP("encryption configured, but RX " |
| 642 | "frame not encrypted (SA=" MAC_FMT |
| 643 | ")\n", MAC_ARG(hdr->addr2)); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 644 | goto rx_dropped; |
| 645 | } |
| 646 | } |
| 647 | |
Jiri Benc | f13baae | 2005-08-25 20:11:46 -0400 | [diff] [blame] | 648 | if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 649 | !ieee80211_is_eapol_frame(ieee, skb)) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 650 | IEEE80211_DEBUG_DROP("dropped unencrypted RX data " |
| 651 | "frame from " MAC_FMT |
| 652 | " (drop_unencrypted=1)\n", |
| 653 | MAC_ARG(hdr->addr2)); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 654 | goto rx_dropped; |
| 655 | } |
| 656 | |
| 657 | /* skb: hdr + (possible reassembled) full plaintext payload */ |
| 658 | |
| 659 | payload = skb->data + hdrlen; |
| 660 | ethertype = (payload[6] << 8) | payload[7]; |
| 661 | |
| 662 | #ifdef NOT_YET |
| 663 | /* If IEEE 802.1X is used, check whether the port is authorized to send |
| 664 | * the received frame. */ |
| 665 | if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) { |
| 666 | if (ethertype == ETH_P_PAE) { |
| 667 | printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n", |
| 668 | dev->name); |
| 669 | if (ieee->hostapd && ieee->apdev) { |
| 670 | /* Send IEEE 802.1X frames to the user |
| 671 | * space daemon for processing */ |
| 672 | prism2_rx_80211(ieee->apdev, skb, rx_stats, |
| 673 | PRISM2_RX_MGMT); |
| 674 | ieee->apdevstats.rx_packets++; |
| 675 | ieee->apdevstats.rx_bytes += skb->len; |
| 676 | goto rx_exit; |
| 677 | } |
| 678 | } else if (!frame_authorized) { |
| 679 | printk(KERN_DEBUG "%s: dropped frame from " |
| 680 | "unauthorized port (IEEE 802.1X): " |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 681 | "ethertype=0x%04x\n", dev->name, ethertype); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 682 | goto rx_dropped; |
| 683 | } |
| 684 | } |
| 685 | #endif |
| 686 | |
| 687 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 688 | if (skb->len - hdrlen >= 8 && |
| 689 | ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 && |
| 690 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| 691 | memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) { |
| 692 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 693 | * replace EtherType */ |
| 694 | skb_pull(skb, hdrlen + SNAP_SIZE); |
| 695 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 696 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 697 | } else { |
| 698 | u16 len; |
| 699 | /* Leave Ethernet header part of hdr and full payload */ |
| 700 | skb_pull(skb, hdrlen); |
| 701 | len = htons(skb->len); |
| 702 | memcpy(skb_push(skb, 2), &len, 2); |
| 703 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| 704 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| 705 | } |
| 706 | |
| 707 | #ifdef NOT_YET |
| 708 | if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 709 | IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 710 | /* Non-standard frame: get addr4 from its bogus location after |
| 711 | * the payload */ |
| 712 | memcpy(skb->data + ETH_ALEN, |
| 713 | skb->data + skb->len - ETH_ALEN, ETH_ALEN); |
| 714 | skb_trim(skb, skb->len - ETH_ALEN); |
| 715 | } |
| 716 | #endif |
| 717 | |
| 718 | stats->rx_packets++; |
| 719 | stats->rx_bytes += skb->len; |
| 720 | |
| 721 | #ifdef NOT_YET |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 722 | if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 723 | if (dst[0] & 0x01) { |
| 724 | /* copy multicast frame both to the higher layers and |
| 725 | * to the wireless media */ |
| 726 | ieee->ap->bridged_multicast++; |
| 727 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 728 | if (skb2 == NULL) |
| 729 | printk(KERN_DEBUG "%s: skb_clone failed for " |
| 730 | "multicast frame\n", dev->name); |
| 731 | } else if (hostap_is_sta_assoc(ieee->ap, dst)) { |
| 732 | /* send frame directly to the associated STA using |
| 733 | * wireless media and not passing to higher layers */ |
| 734 | ieee->ap->bridged_unicast++; |
| 735 | skb2 = skb; |
| 736 | skb = NULL; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | if (skb2 != NULL) { |
| 741 | /* send to wireless media */ |
| 742 | skb2->protocol = __constant_htons(ETH_P_802_3); |
| 743 | skb2->mac.raw = skb2->nh.raw = skb2->data; |
| 744 | /* skb2->nh.raw = skb2->data + ETH_HLEN; */ |
| 745 | skb2->dev = dev; |
| 746 | dev_queue_xmit(skb2); |
| 747 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 748 | #endif |
| 749 | |
| 750 | if (skb) { |
| 751 | skb->protocol = eth_type_trans(skb, dev); |
| 752 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 753 | skb->dev = dev; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 754 | skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ |
Zhu Yi | d652923 | 2006-01-19 16:20:49 +0800 | [diff] [blame] | 755 | if (netif_rx(skb) == NET_RX_DROP) { |
| 756 | /* netif_rx always succeeds, but it might drop |
| 757 | * the packet. If it drops the packet, we log that |
| 758 | * in our stats. */ |
| 759 | IEEE80211_DEBUG_DROP |
| 760 | ("RX: netif_rx dropped the packet\n"); |
| 761 | stats->rx_dropped++; |
| 762 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 763 | } |
| 764 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 765 | rx_exit: |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 766 | #ifdef NOT_YET |
| 767 | if (sta) |
| 768 | hostap_handle_sta_release(sta); |
| 769 | #endif |
| 770 | return 1; |
| 771 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 772 | rx_dropped: |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 773 | stats->rx_dropped++; |
| 774 | |
| 775 | /* Returning 0 indicates to caller that we have not handled the SKB-- |
| 776 | * so it is still allocated and can be used again by underlying |
| 777 | * hardware as a DMA target */ |
| 778 | return 0; |
| 779 | } |
| 780 | |
Denis Vlasenko | 1a995b45 | 2006-01-24 16:57:11 +0200 | [diff] [blame] | 781 | /* Filter out unrelated packets, call ieee80211_rx[_mgt] */ |
| 782 | int ieee80211_rx_any(struct ieee80211_device *ieee, |
| 783 | struct sk_buff *skb, struct ieee80211_rx_stats *stats) |
| 784 | { |
| 785 | struct ieee80211_hdr_4addr *hdr; |
| 786 | int is_packet_for_us; |
| 787 | u16 fc; |
| 788 | |
| 789 | if (ieee->iw_mode == IW_MODE_MONITOR) |
| 790 | return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL; |
| 791 | |
| 792 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
| 793 | fc = le16_to_cpu(hdr->frame_ctl); |
| 794 | |
| 795 | if ((fc & IEEE80211_FCTL_VERS) != 0) |
| 796 | return -EINVAL; |
| 797 | |
| 798 | switch (fc & IEEE80211_FCTL_FTYPE) { |
| 799 | case IEEE80211_FTYPE_MGMT: |
| 800 | ieee80211_rx_mgt(ieee, hdr, stats); |
| 801 | return 0; |
| 802 | case IEEE80211_FTYPE_DATA: |
| 803 | break; |
| 804 | case IEEE80211_FTYPE_CTL: |
| 805 | return 0; |
| 806 | default: |
| 807 | return -EINVAL; |
| 808 | } |
| 809 | |
| 810 | is_packet_for_us = 0; |
| 811 | switch (ieee->iw_mode) { |
| 812 | case IW_MODE_ADHOC: |
| 813 | /* our BSS and not from/to DS */ |
| 814 | if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0) |
| 815 | if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) { |
| 816 | /* promisc: get all */ |
| 817 | if (ieee->dev->flags & IFF_PROMISC) |
| 818 | is_packet_for_us = 1; |
| 819 | /* to us */ |
| 820 | else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0) |
| 821 | is_packet_for_us = 1; |
| 822 | /* mcast */ |
| 823 | else if (is_multicast_ether_addr(hdr->addr1)) |
| 824 | is_packet_for_us = 1; |
| 825 | } |
| 826 | break; |
| 827 | case IW_MODE_INFRA: |
| 828 | /* our BSS (== from our AP) and from DS */ |
| 829 | if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0) |
| 830 | if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) { |
| 831 | /* promisc: get all */ |
| 832 | if (ieee->dev->flags & IFF_PROMISC) |
| 833 | is_packet_for_us = 1; |
| 834 | /* to us */ |
| 835 | else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0) |
| 836 | is_packet_for_us = 1; |
| 837 | /* mcast */ |
| 838 | else if (is_multicast_ether_addr(hdr->addr1)) { |
| 839 | /* not our own packet bcasted from AP */ |
| 840 | if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN)) |
| 841 | is_packet_for_us = 1; |
| 842 | } |
| 843 | } |
| 844 | break; |
| 845 | default: |
| 846 | /* ? */ |
| 847 | break; |
| 848 | } |
| 849 | |
| 850 | if (is_packet_for_us) |
| 851 | return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL); |
| 852 | return 0; |
| 853 | } |
| 854 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 855 | #define MGMT_FRAME_FIXED_PART_LENGTH 0x24 |
| 856 | |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 857 | static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; |
| 858 | |
| 859 | /* |
| 860 | * Make ther structure we read from the beacon packet has |
| 861 | * the right values |
| 862 | */ |
| 863 | static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element |
| 864 | *info_element, int sub_type) |
| 865 | { |
| 866 | |
| 867 | if (info_element->qui_subtype != sub_type) |
| 868 | return -1; |
| 869 | if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) |
| 870 | return -1; |
| 871 | if (info_element->qui_type != QOS_OUI_TYPE) |
| 872 | return -1; |
| 873 | if (info_element->version != QOS_VERSION_1) |
| 874 | return -1; |
| 875 | |
| 876 | return 0; |
| 877 | } |
| 878 | |
| 879 | /* |
| 880 | * Parse a QoS parameter element |
| 881 | */ |
| 882 | static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info |
| 883 | *element_param, struct ieee80211_info_element |
| 884 | *info_element) |
| 885 | { |
| 886 | int ret = 0; |
| 887 | u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2; |
| 888 | |
| 889 | if ((info_element == NULL) || (element_param == NULL)) |
| 890 | return -1; |
| 891 | |
| 892 | if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) { |
| 893 | memcpy(element_param->info_element.qui, info_element->data, |
| 894 | info_element->len); |
| 895 | element_param->info_element.elementID = info_element->id; |
| 896 | element_param->info_element.length = info_element->len; |
| 897 | } else |
| 898 | ret = -1; |
| 899 | if (ret == 0) |
| 900 | ret = ieee80211_verify_qos_info(&element_param->info_element, |
| 901 | QOS_OUI_PARAM_SUB_TYPE); |
| 902 | return ret; |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * Parse a QoS information element |
| 907 | */ |
| 908 | static int ieee80211_read_qos_info_element(struct |
| 909 | ieee80211_qos_information_element |
| 910 | *element_info, struct ieee80211_info_element |
| 911 | *info_element) |
| 912 | { |
| 913 | int ret = 0; |
| 914 | u16 size = sizeof(struct ieee80211_qos_information_element) - 2; |
| 915 | |
| 916 | if (element_info == NULL) |
| 917 | return -1; |
| 918 | if (info_element == NULL) |
| 919 | return -1; |
| 920 | |
| 921 | if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) { |
| 922 | memcpy(element_info->qui, info_element->data, |
| 923 | info_element->len); |
| 924 | element_info->elementID = info_element->id; |
| 925 | element_info->length = info_element->len; |
| 926 | } else |
| 927 | ret = -1; |
| 928 | |
| 929 | if (ret == 0) |
| 930 | ret = ieee80211_verify_qos_info(element_info, |
| 931 | QOS_OUI_INFO_SUB_TYPE); |
| 932 | return ret; |
| 933 | } |
| 934 | |
| 935 | /* |
| 936 | * Write QoS parameters from the ac parameters. |
| 937 | */ |
| 938 | static int ieee80211_qos_convert_ac_to_parameters(struct |
| 939 | ieee80211_qos_parameter_info |
| 940 | *param_elm, struct |
| 941 | ieee80211_qos_parameters |
| 942 | *qos_param) |
| 943 | { |
| 944 | int rc = 0; |
| 945 | int i; |
| 946 | struct ieee80211_qos_ac_parameter *ac_params; |
| 947 | u32 txop; |
| 948 | u8 cw_min; |
| 949 | u8 cw_max; |
| 950 | |
| 951 | for (i = 0; i < QOS_QUEUE_NUM; i++) { |
| 952 | ac_params = &(param_elm->ac_params_record[i]); |
| 953 | |
| 954 | qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F; |
| 955 | qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2; |
| 956 | |
| 957 | cw_min = ac_params->ecw_min_max & 0x0F; |
| 958 | qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1); |
| 959 | |
| 960 | cw_max = (ac_params->ecw_min_max & 0xF0) >> 4; |
| 961 | qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1); |
| 962 | |
| 963 | qos_param->flag[i] = |
| 964 | (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; |
| 965 | |
| 966 | txop = le16_to_cpu(ac_params->tx_op_limit) * 32; |
| 967 | qos_param->tx_op_limit[i] = (u16) txop; |
| 968 | } |
| 969 | return rc; |
| 970 | } |
| 971 | |
| 972 | /* |
| 973 | * we have a generic data element which it may contain QoS information or |
| 974 | * parameters element. check the information element length to decide |
| 975 | * which type to read |
| 976 | */ |
| 977 | static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element |
| 978 | *info_element, |
| 979 | struct ieee80211_network *network) |
| 980 | { |
| 981 | int rc = 0; |
| 982 | struct ieee80211_qos_parameters *qos_param = NULL; |
| 983 | struct ieee80211_qos_information_element qos_info_element; |
| 984 | |
| 985 | rc = ieee80211_read_qos_info_element(&qos_info_element, info_element); |
| 986 | |
| 987 | if (rc == 0) { |
| 988 | network->qos_data.param_count = qos_info_element.ac_info & 0x0F; |
| 989 | network->flags |= NETWORK_HAS_QOS_INFORMATION; |
| 990 | } else { |
| 991 | struct ieee80211_qos_parameter_info param_element; |
| 992 | |
| 993 | rc = ieee80211_read_qos_param_element(¶m_element, |
| 994 | info_element); |
| 995 | if (rc == 0) { |
| 996 | qos_param = &(network->qos_data.parameters); |
| 997 | ieee80211_qos_convert_ac_to_parameters(¶m_element, |
| 998 | qos_param); |
| 999 | network->flags |= NETWORK_HAS_QOS_PARAMETERS; |
| 1000 | network->qos_data.param_count = |
| 1001 | param_element.info_element.ac_info & 0x0F; |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | if (rc == 0) { |
| 1006 | IEEE80211_DEBUG_QOS("QoS is supported\n"); |
| 1007 | network->qos_data.supported = 1; |
| 1008 | } |
| 1009 | return rc; |
| 1010 | } |
| 1011 | |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1012 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1013 | #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x |
| 1014 | |
| 1015 | static const char *get_info_element_string(u16 id) |
| 1016 | { |
| 1017 | switch (id) { |
| 1018 | MFIE_STRING(SSID); |
| 1019 | MFIE_STRING(RATES); |
| 1020 | MFIE_STRING(FH_SET); |
| 1021 | MFIE_STRING(DS_SET); |
| 1022 | MFIE_STRING(CF_SET); |
| 1023 | MFIE_STRING(TIM); |
| 1024 | MFIE_STRING(IBSS_SET); |
| 1025 | MFIE_STRING(COUNTRY); |
| 1026 | MFIE_STRING(HOP_PARAMS); |
| 1027 | MFIE_STRING(HOP_TABLE); |
| 1028 | MFIE_STRING(REQUEST); |
| 1029 | MFIE_STRING(CHALLENGE); |
| 1030 | MFIE_STRING(POWER_CONSTRAINT); |
| 1031 | MFIE_STRING(POWER_CAPABILITY); |
| 1032 | MFIE_STRING(TPC_REQUEST); |
| 1033 | MFIE_STRING(TPC_REPORT); |
| 1034 | MFIE_STRING(SUPP_CHANNELS); |
| 1035 | MFIE_STRING(CSA); |
| 1036 | MFIE_STRING(MEASURE_REQUEST); |
| 1037 | MFIE_STRING(MEASURE_REPORT); |
| 1038 | MFIE_STRING(QUIET); |
| 1039 | MFIE_STRING(IBSS_DFS); |
| 1040 | MFIE_STRING(ERP_INFO); |
| 1041 | MFIE_STRING(RSN); |
| 1042 | MFIE_STRING(RATES_EX); |
| 1043 | MFIE_STRING(GENERIC); |
| 1044 | MFIE_STRING(QOS_PARAMETER); |
| 1045 | default: |
| 1046 | return "UNKNOWN"; |
| 1047 | } |
| 1048 | } |
| 1049 | #endif |
| 1050 | |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1051 | static int ieee80211_parse_info_param(struct ieee80211_info_element |
| 1052 | *info_element, u16 length, |
| 1053 | struct ieee80211_network *network) |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1054 | { |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1055 | u8 i; |
| 1056 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1057 | char rates_str[64]; |
| 1058 | char *p; |
| 1059 | #endif |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1060 | |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1061 | while (length >= sizeof(*info_element)) { |
| 1062 | if (sizeof(*info_element) + info_element->len > length) { |
| 1063 | IEEE80211_DEBUG_MGMT("Info elem: parse failed: " |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1064 | "info_element->len + 2 > left : " |
| 1065 | "info_element->len+2=%zd left=%d, id=%d.\n", |
| 1066 | info_element->len + |
| 1067 | sizeof(*info_element), |
| 1068 | length, info_element->id); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1069 | return 1; |
| 1070 | } |
| 1071 | |
| 1072 | switch (info_element->id) { |
| 1073 | case MFIE_TYPE_SSID: |
| 1074 | if (ieee80211_is_empty_essid(info_element->data, |
| 1075 | info_element->len)) { |
| 1076 | network->flags |= NETWORK_EMPTY_ESSID; |
| 1077 | break; |
| 1078 | } |
| 1079 | |
| 1080 | network->ssid_len = min(info_element->len, |
| 1081 | (u8) IW_ESSID_MAX_SIZE); |
| 1082 | memcpy(network->ssid, info_element->data, |
| 1083 | network->ssid_len); |
| 1084 | if (network->ssid_len < IW_ESSID_MAX_SIZE) |
| 1085 | memset(network->ssid + network->ssid_len, 0, |
| 1086 | IW_ESSID_MAX_SIZE - network->ssid_len); |
| 1087 | |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1088 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n", |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1089 | network->ssid, network->ssid_len); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1090 | break; |
| 1091 | |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1092 | case MFIE_TYPE_RATES: |
| 1093 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1094 | p = rates_str; |
| 1095 | #endif |
| 1096 | network->rates_len = min(info_element->len, |
| 1097 | MAX_RATES_LENGTH); |
| 1098 | for (i = 0; i < network->rates_len; i++) { |
| 1099 | network->rates[i] = info_element->data[i]; |
| 1100 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1101 | p += snprintf(p, sizeof(rates_str) - |
| 1102 | (p - rates_str), "%02X ", |
| 1103 | network->rates[i]); |
| 1104 | #endif |
| 1105 | if (ieee80211_is_ofdm_rate |
| 1106 | (info_element->data[i])) { |
| 1107 | network->flags |= NETWORK_HAS_OFDM; |
| 1108 | if (info_element->data[i] & |
| 1109 | IEEE80211_BASIC_RATE_MASK) |
| 1110 | network->flags &= |
| 1111 | ~NETWORK_HAS_CCK; |
| 1112 | } |
| 1113 | } |
| 1114 | |
| 1115 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n", |
| 1116 | rates_str, network->rates_len); |
| 1117 | break; |
| 1118 | |
| 1119 | case MFIE_TYPE_RATES_EX: |
| 1120 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1121 | p = rates_str; |
| 1122 | #endif |
| 1123 | network->rates_ex_len = min(info_element->len, |
| 1124 | MAX_RATES_EX_LENGTH); |
| 1125 | for (i = 0; i < network->rates_ex_len; i++) { |
| 1126 | network->rates_ex[i] = info_element->data[i]; |
| 1127 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1128 | p += snprintf(p, sizeof(rates_str) - |
| 1129 | (p - rates_str), "%02X ", |
| 1130 | network->rates[i]); |
| 1131 | #endif |
| 1132 | if (ieee80211_is_ofdm_rate |
| 1133 | (info_element->data[i])) { |
| 1134 | network->flags |= NETWORK_HAS_OFDM; |
| 1135 | if (info_element->data[i] & |
| 1136 | IEEE80211_BASIC_RATE_MASK) |
| 1137 | network->flags &= |
| 1138 | ~NETWORK_HAS_CCK; |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n", |
| 1143 | rates_str, network->rates_ex_len); |
| 1144 | break; |
| 1145 | |
| 1146 | case MFIE_TYPE_DS_SET: |
| 1147 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n", |
| 1148 | info_element->data[0]); |
| 1149 | network->channel = info_element->data[0]; |
| 1150 | break; |
| 1151 | |
| 1152 | case MFIE_TYPE_FH_SET: |
| 1153 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n"); |
| 1154 | break; |
| 1155 | |
| 1156 | case MFIE_TYPE_CF_SET: |
| 1157 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n"); |
| 1158 | break; |
| 1159 | |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1160 | case MFIE_TYPE_TIM: |
Zhu Yi | 41a25c6 | 2006-01-19 16:22:23 +0800 | [diff] [blame] | 1161 | network->tim.tim_count = info_element->data[0]; |
| 1162 | network->tim.tim_period = info_element->data[1]; |
| 1163 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n"); |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1164 | break; |
| 1165 | |
| 1166 | case MFIE_TYPE_ERP_INFO: |
| 1167 | network->erp_value = info_element->data[0]; |
| 1168 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n", |
| 1169 | network->erp_value); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1170 | break; |
| 1171 | |
| 1172 | case MFIE_TYPE_IBSS_SET: |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1173 | network->atim_window = info_element->data[0]; |
| 1174 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n", |
| 1175 | network->atim_window); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1176 | break; |
| 1177 | |
| 1178 | case MFIE_TYPE_CHALLENGE: |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1179 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n"); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1180 | break; |
| 1181 | |
| 1182 | case MFIE_TYPE_GENERIC: |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1183 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n", |
| 1184 | info_element->len); |
| 1185 | if (!ieee80211_parse_qos_info_param_IE(info_element, |
| 1186 | network)) |
| 1187 | break; |
| 1188 | |
| 1189 | if (info_element->len >= 4 && |
| 1190 | info_element->data[0] == 0x00 && |
| 1191 | info_element->data[1] == 0x50 && |
| 1192 | info_element->data[2] == 0xf2 && |
| 1193 | info_element->data[3] == 0x01) { |
| 1194 | network->wpa_ie_len = min(info_element->len + 2, |
| 1195 | MAX_WPA_IE_LEN); |
| 1196 | memcpy(network->wpa_ie, info_element, |
| 1197 | network->wpa_ie_len); |
| 1198 | } |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1199 | break; |
| 1200 | |
| 1201 | case MFIE_TYPE_RSN: |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1202 | IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n", |
| 1203 | info_element->len); |
| 1204 | network->rsn_ie_len = min(info_element->len + 2, |
| 1205 | MAX_WPA_IE_LEN); |
| 1206 | memcpy(network->rsn_ie, info_element, |
| 1207 | network->rsn_ie_len); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1208 | break; |
| 1209 | |
| 1210 | case MFIE_TYPE_QOS_PARAMETER: |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1211 | printk(KERN_ERR |
| 1212 | "QoS Error need to parse QOS_PARAMETER IE\n"); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1213 | break; |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1214 | /* 802.11h */ |
| 1215 | case MFIE_TYPE_POWER_CONSTRAINT: |
| 1216 | network->power_constraint = info_element->data[0]; |
| 1217 | network->flags |= NETWORK_HAS_POWER_CONSTRAINT; |
| 1218 | break; |
| 1219 | |
| 1220 | case MFIE_TYPE_CSA: |
| 1221 | network->power_constraint = info_element->data[0]; |
| 1222 | network->flags |= NETWORK_HAS_CSA; |
| 1223 | break; |
| 1224 | |
| 1225 | case MFIE_TYPE_QUIET: |
| 1226 | network->quiet.count = info_element->data[0]; |
| 1227 | network->quiet.period = info_element->data[1]; |
| 1228 | network->quiet.duration = info_element->data[2]; |
| 1229 | network->quiet.offset = info_element->data[3]; |
| 1230 | network->flags |= NETWORK_HAS_QUIET; |
| 1231 | break; |
| 1232 | |
| 1233 | case MFIE_TYPE_IBSS_DFS: |
| 1234 | if (network->ibss_dfs) |
| 1235 | break; |
| 1236 | network->ibss_dfs = |
| 1237 | kmalloc(info_element->len, GFP_ATOMIC); |
| 1238 | if (!network->ibss_dfs) |
| 1239 | return 1; |
| 1240 | memcpy(network->ibss_dfs, info_element->data, |
| 1241 | info_element->len); |
| 1242 | network->flags |= NETWORK_HAS_IBSS_DFS; |
| 1243 | break; |
| 1244 | |
| 1245 | case MFIE_TYPE_TPC_REPORT: |
| 1246 | network->tpc_report.transmit_power = |
| 1247 | info_element->data[0]; |
| 1248 | network->tpc_report.link_margin = info_element->data[1]; |
| 1249 | network->flags |= NETWORK_HAS_TPC_REPORT; |
| 1250 | break; |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1251 | |
| 1252 | default: |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1253 | IEEE80211_DEBUG_MGMT |
| 1254 | ("Unsupported info element: %s (%d)\n", |
| 1255 | get_info_element_string(info_element->id), |
| 1256 | info_element->id); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1257 | break; |
| 1258 | } |
| 1259 | |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1260 | length -= sizeof(*info_element) + info_element->len; |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1261 | info_element = |
| 1262 | (struct ieee80211_info_element *)&info_element-> |
| 1263 | data[info_element->len]; |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1264 | } |
| 1265 | |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1266 | return 0; |
| 1267 | } |
| 1268 | |
| 1269 | static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response |
| 1270 | *frame, struct ieee80211_rx_stats *stats) |
| 1271 | { |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1272 | struct ieee80211_network network_resp = { |
| 1273 | .ibss_dfs = NULL, |
| 1274 | }; |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1275 | struct ieee80211_network *network = &network_resp; |
| 1276 | struct net_device *dev = ieee->dev; |
| 1277 | |
| 1278 | network->flags = 0; |
| 1279 | network->qos_data.active = 0; |
| 1280 | network->qos_data.supported = 0; |
| 1281 | network->qos_data.param_count = 0; |
| 1282 | network->qos_data.old_param_count = 0; |
| 1283 | |
| 1284 | //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF); |
| 1285 | network->atim_window = le16_to_cpu(frame->aid); |
| 1286 | network->listen_interval = le16_to_cpu(frame->status); |
Ivo van Doorn | c1bda44 | 2005-10-03 10:20:47 -0500 | [diff] [blame] | 1287 | memcpy(network->bssid, frame->header.addr3, ETH_ALEN); |
| 1288 | network->capability = le16_to_cpu(frame->capability); |
| 1289 | network->last_scanned = jiffies; |
| 1290 | network->rates_len = network->rates_ex_len = 0; |
| 1291 | network->last_associate = 0; |
| 1292 | network->ssid_len = 0; |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1293 | network->erp_value = |
| 1294 | (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0; |
Ivo van Doorn | c1bda44 | 2005-10-03 10:20:47 -0500 | [diff] [blame] | 1295 | |
| 1296 | if (stats->freq == IEEE80211_52GHZ_BAND) { |
| 1297 | /* for A band (No DS info) */ |
| 1298 | network->channel = stats->received_channel; |
| 1299 | } else |
| 1300 | network->flags |= NETWORK_HAS_CCK; |
| 1301 | |
| 1302 | network->wpa_ie_len = 0; |
| 1303 | network->rsn_ie_len = 0; |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1304 | |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1305 | if (ieee80211_parse_info_param |
| 1306 | (frame->info_element, stats->len - sizeof(*frame), network)) |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1307 | return 1; |
| 1308 | |
Ivo van Doorn | c1bda44 | 2005-10-03 10:20:47 -0500 | [diff] [blame] | 1309 | network->mode = 0; |
| 1310 | if (stats->freq == IEEE80211_52GHZ_BAND) |
| 1311 | network->mode = IEEE_A; |
| 1312 | else { |
| 1313 | if (network->flags & NETWORK_HAS_OFDM) |
| 1314 | network->mode |= IEEE_G; |
| 1315 | if (network->flags & NETWORK_HAS_CCK) |
| 1316 | network->mode |= IEEE_B; |
| 1317 | } |
| 1318 | |
| 1319 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) |
| 1320 | network->flags |= NETWORK_EMPTY_ESSID; |
| 1321 | |
| 1322 | memcpy(&network->stats, stats, sizeof(network->stats)); |
| 1323 | |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1324 | if (ieee->handle_assoc_response != NULL) |
| 1325 | ieee->handle_assoc_response(dev, frame, network); |
| 1326 | |
| 1327 | return 0; |
| 1328 | } |
| 1329 | |
| 1330 | /***************************************************/ |
| 1331 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1332 | static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1333 | *beacon, |
| 1334 | struct ieee80211_network *network, |
| 1335 | struct ieee80211_rx_stats *stats) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1336 | { |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1337 | network->qos_data.active = 0; |
| 1338 | network->qos_data.supported = 0; |
| 1339 | network->qos_data.param_count = 0; |
Ivo van Doorn | c1bda44 | 2005-10-03 10:20:47 -0500 | [diff] [blame] | 1340 | network->qos_data.old_param_count = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1341 | |
| 1342 | /* Pull out fixed field data */ |
| 1343 | memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1344 | network->capability = le16_to_cpu(beacon->capability); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1345 | network->last_scanned = jiffies; |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1346 | network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]); |
| 1347 | network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]); |
| 1348 | network->beacon_interval = le16_to_cpu(beacon->beacon_interval); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1349 | /* Where to pull this? beacon->listen_interval; */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1350 | network->listen_interval = 0x0A; |
| 1351 | network->rates_len = network->rates_ex_len = 0; |
| 1352 | network->last_associate = 0; |
| 1353 | network->ssid_len = 0; |
| 1354 | network->flags = 0; |
| 1355 | network->atim_window = 0; |
James Ketrenos | 42c94e4 | 2005-09-21 11:58:29 -0500 | [diff] [blame] | 1356 | network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? |
James Ketrenos | ccd0fda | 2005-09-21 11:58:32 -0500 | [diff] [blame] | 1357 | 0x3 : 0x0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1358 | |
| 1359 | if (stats->freq == IEEE80211_52GHZ_BAND) { |
| 1360 | /* for A band (No DS info) */ |
| 1361 | network->channel = stats->received_channel; |
| 1362 | } else |
| 1363 | network->flags |= NETWORK_HAS_CCK; |
| 1364 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1365 | network->wpa_ie_len = 0; |
| 1366 | network->rsn_ie_len = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1367 | |
James Ketrenos | ff0037b | 2005-10-03 10:23:42 -0500 | [diff] [blame] | 1368 | if (ieee80211_parse_info_param |
| 1369 | (beacon->info_element, stats->len - sizeof(*beacon), network)) |
Ivo van Doorn | ff9e00f | 2005-10-03 10:19:25 -0500 | [diff] [blame] | 1370 | return 1; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1371 | |
| 1372 | network->mode = 0; |
| 1373 | if (stats->freq == IEEE80211_52GHZ_BAND) |
| 1374 | network->mode = IEEE_A; |
| 1375 | else { |
| 1376 | if (network->flags & NETWORK_HAS_OFDM) |
| 1377 | network->mode |= IEEE_G; |
| 1378 | if (network->flags & NETWORK_HAS_CCK) |
| 1379 | network->mode |= IEEE_B; |
| 1380 | } |
| 1381 | |
| 1382 | if (network->mode == 0) { |
| 1383 | IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' " |
| 1384 | "network.\n", |
| 1385 | escape_essid(network->ssid, |
| 1386 | network->ssid_len), |
| 1387 | MAC_ARG(network->bssid)); |
| 1388 | return 1; |
| 1389 | } |
| 1390 | |
| 1391 | if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) |
| 1392 | network->flags |= NETWORK_EMPTY_ESSID; |
| 1393 | |
| 1394 | memcpy(&network->stats, stats, sizeof(network->stats)); |
| 1395 | |
| 1396 | return 0; |
| 1397 | } |
| 1398 | |
| 1399 | static inline int is_same_network(struct ieee80211_network *src, |
| 1400 | struct ieee80211_network *dst) |
| 1401 | { |
| 1402 | /* A network is only a duplicate if the channel, BSSID, and ESSID |
| 1403 | * all match. We treat all <hidden> with the same BSSID and channel |
| 1404 | * as one network */ |
| 1405 | return ((src->ssid_len == dst->ssid_len) && |
| 1406 | (src->channel == dst->channel) && |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 1407 | !compare_ether_addr(src->bssid, dst->bssid) && |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1408 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); |
| 1409 | } |
| 1410 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1411 | static void update_network(struct ieee80211_network *dst, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1412 | struct ieee80211_network *src) |
| 1413 | { |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1414 | int qos_active; |
| 1415 | u8 old_param; |
| 1416 | |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1417 | ieee80211_network_reset(dst); |
| 1418 | dst->ibss_dfs = src->ibss_dfs; |
| 1419 | |
James Ketrenos | f44349f | 2006-03-08 13:14:45 -0600 | [diff] [blame] | 1420 | /* We only update the statistics if they were created by receiving |
| 1421 | * the network information on the actual channel the network is on. |
| 1422 | * |
| 1423 | * This keeps beacons received on neighbor channels from bringing |
| 1424 | * down the signal level of an AP. */ |
| 1425 | if (dst->channel == src->stats.received_channel) |
| 1426 | memcpy(&dst->stats, &src->stats, |
| 1427 | sizeof(struct ieee80211_rx_stats)); |
| 1428 | else |
| 1429 | IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received " |
| 1430 | "off channel (%d vs. %d)\n", MAC_ARG(src->bssid), |
| 1431 | dst->channel, src->stats.received_channel); |
| 1432 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1433 | dst->capability = src->capability; |
| 1434 | memcpy(dst->rates, src->rates, src->rates_len); |
| 1435 | dst->rates_len = src->rates_len; |
| 1436 | memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); |
| 1437 | dst->rates_ex_len = src->rates_ex_len; |
| 1438 | |
| 1439 | dst->mode = src->mode; |
| 1440 | dst->flags = src->flags; |
| 1441 | dst->time_stamp[0] = src->time_stamp[0]; |
| 1442 | dst->time_stamp[1] = src->time_stamp[1]; |
| 1443 | |
| 1444 | dst->beacon_interval = src->beacon_interval; |
| 1445 | dst->listen_interval = src->listen_interval; |
| 1446 | dst->atim_window = src->atim_window; |
James Ketrenos | 42c94e4 | 2005-09-21 11:58:29 -0500 | [diff] [blame] | 1447 | dst->erp_value = src->erp_value; |
Zhu Yi | 41a25c6 | 2006-01-19 16:22:23 +0800 | [diff] [blame] | 1448 | dst->tim = src->tim; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1449 | |
| 1450 | memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); |
| 1451 | dst->wpa_ie_len = src->wpa_ie_len; |
| 1452 | memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); |
| 1453 | dst->rsn_ie_len = src->rsn_ie_len; |
| 1454 | |
| 1455 | dst->last_scanned = jiffies; |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1456 | qos_active = src->qos_data.active; |
| 1457 | old_param = dst->qos_data.old_param_count; |
| 1458 | if (dst->flags & NETWORK_HAS_QOS_MASK) |
| 1459 | memcpy(&dst->qos_data, &src->qos_data, |
| 1460 | sizeof(struct ieee80211_qos_data)); |
| 1461 | else { |
| 1462 | dst->qos_data.supported = src->qos_data.supported; |
| 1463 | dst->qos_data.param_count = src->qos_data.param_count; |
| 1464 | } |
| 1465 | |
| 1466 | if (dst->qos_data.supported == 1) { |
| 1467 | if (dst->ssid_len) |
| 1468 | IEEE80211_DEBUG_QOS |
| 1469 | ("QoS the network %s is QoS supported\n", |
| 1470 | dst->ssid); |
| 1471 | else |
| 1472 | IEEE80211_DEBUG_QOS |
| 1473 | ("QoS the network is QoS supported\n"); |
| 1474 | } |
| 1475 | dst->qos_data.active = qos_active; |
| 1476 | dst->qos_data.old_param_count = old_param; |
| 1477 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1478 | /* dst->last_associate is not overwritten */ |
| 1479 | } |
| 1480 | |
Pete Zaitcev | 4832843 | 2006-02-26 23:43:20 -0800 | [diff] [blame] | 1481 | static inline int is_beacon(__le16 fc) |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1482 | { |
| 1483 | return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON); |
| 1484 | } |
| 1485 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1486 | static void ieee80211_process_probe_response(struct ieee80211_device |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 1487 | *ieee, struct |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1488 | ieee80211_probe_response |
James Ketrenos | 74079fd | 2005-09-13 17:35:21 -0500 | [diff] [blame] | 1489 | *beacon, struct ieee80211_rx_stats |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1490 | *stats) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1491 | { |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1492 | struct net_device *dev = ieee->dev; |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1493 | struct ieee80211_network network = { |
| 1494 | .ibss_dfs = NULL, |
| 1495 | }; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1496 | struct ieee80211_network *target; |
| 1497 | struct ieee80211_network *oldest = NULL; |
| 1498 | #ifdef CONFIG_IEEE80211_DEBUG |
James Ketrenos | 68e4e03 | 2005-09-13 17:37:22 -0500 | [diff] [blame] | 1499 | struct ieee80211_info_element *info_element = beacon->info_element; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1500 | #endif |
| 1501 | unsigned long flags; |
| 1502 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1503 | IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT |
| 1504 | "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", |
| 1505 | escape_essid(info_element->data, |
| 1506 | info_element->len), |
| 1507 | MAC_ARG(beacon->header.addr3), |
| 1508 | (beacon->capability & (1 << 0xf)) ? '1' : '0', |
| 1509 | (beacon->capability & (1 << 0xe)) ? '1' : '0', |
| 1510 | (beacon->capability & (1 << 0xd)) ? '1' : '0', |
| 1511 | (beacon->capability & (1 << 0xc)) ? '1' : '0', |
| 1512 | (beacon->capability & (1 << 0xb)) ? '1' : '0', |
| 1513 | (beacon->capability & (1 << 0xa)) ? '1' : '0', |
| 1514 | (beacon->capability & (1 << 0x9)) ? '1' : '0', |
| 1515 | (beacon->capability & (1 << 0x8)) ? '1' : '0', |
| 1516 | (beacon->capability & (1 << 0x7)) ? '1' : '0', |
| 1517 | (beacon->capability & (1 << 0x6)) ? '1' : '0', |
| 1518 | (beacon->capability & (1 << 0x5)) ? '1' : '0', |
| 1519 | (beacon->capability & (1 << 0x4)) ? '1' : '0', |
| 1520 | (beacon->capability & (1 << 0x3)) ? '1' : '0', |
| 1521 | (beacon->capability & (1 << 0x2)) ? '1' : '0', |
| 1522 | (beacon->capability & (1 << 0x1)) ? '1' : '0', |
| 1523 | (beacon->capability & (1 << 0x0)) ? '1' : '0'); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1524 | |
| 1525 | if (ieee80211_network_init(ieee, beacon, &network, stats)) { |
| 1526 | IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n", |
| 1527 | escape_essid(info_element->data, |
| 1528 | info_element->len), |
| 1529 | MAC_ARG(beacon->header.addr3), |
Pete Zaitcev | 4832843 | 2006-02-26 23:43:20 -0800 | [diff] [blame] | 1530 | is_beacon(beacon->header.frame_ctl) ? |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1531 | "BEACON" : "PROBE RESPONSE"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1532 | return; |
| 1533 | } |
| 1534 | |
| 1535 | /* The network parsed correctly -- so now we scan our known networks |
| 1536 | * to see if we can find it in our list. |
| 1537 | * |
| 1538 | * NOTE: This search is definitely not optimized. Once its doing |
| 1539 | * the "right thing" we'll optimize it for efficiency if |
| 1540 | * necessary */ |
| 1541 | |
| 1542 | /* Search for this entry in the list and update it if it is |
| 1543 | * already there. */ |
| 1544 | |
| 1545 | spin_lock_irqsave(&ieee->lock, flags); |
| 1546 | |
| 1547 | list_for_each_entry(target, &ieee->network_list, list) { |
| 1548 | if (is_same_network(target, &network)) |
| 1549 | break; |
| 1550 | |
| 1551 | if ((oldest == NULL) || |
| 1552 | (target->last_scanned < oldest->last_scanned)) |
| 1553 | oldest = target; |
| 1554 | } |
| 1555 | |
| 1556 | /* If we didn't find a match, then get a new network slot to initialize |
| 1557 | * with this beacon's information */ |
| 1558 | if (&target->list == &ieee->network_list) { |
| 1559 | if (list_empty(&ieee->network_free_list)) { |
| 1560 | /* If there are no more slots, expire the oldest */ |
| 1561 | list_del(&oldest->list); |
| 1562 | target = oldest; |
| 1563 | IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from " |
| 1564 | "network list.\n", |
| 1565 | escape_essid(target->ssid, |
| 1566 | target->ssid_len), |
| 1567 | MAC_ARG(target->bssid)); |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1568 | ieee80211_network_reset(target); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1569 | } else { |
| 1570 | /* Otherwise just pull from the free list */ |
| 1571 | target = list_entry(ieee->network_free_list.next, |
| 1572 | struct ieee80211_network, list); |
| 1573 | list_del(ieee->network_free_list.next); |
| 1574 | } |
| 1575 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1576 | #ifdef CONFIG_IEEE80211_DEBUG |
| 1577 | IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n", |
| 1578 | escape_essid(network.ssid, |
| 1579 | network.ssid_len), |
| 1580 | MAC_ARG(network.bssid), |
Pete Zaitcev | 4832843 | 2006-02-26 23:43:20 -0800 | [diff] [blame] | 1581 | is_beacon(beacon->header.frame_ctl) ? |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1582 | "BEACON" : "PROBE RESPONSE"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1583 | #endif |
| 1584 | memcpy(target, &network, sizeof(*target)); |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1585 | network.ibss_dfs = NULL; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1586 | list_add_tail(&target->list, &ieee->network_list); |
| 1587 | } else { |
| 1588 | IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n", |
| 1589 | escape_essid(target->ssid, |
| 1590 | target->ssid_len), |
| 1591 | MAC_ARG(target->bssid), |
Pete Zaitcev | 4832843 | 2006-02-26 23:43:20 -0800 | [diff] [blame] | 1592 | is_beacon(beacon->header.frame_ctl) ? |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1593 | "BEACON" : "PROBE RESPONSE"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1594 | update_network(target, &network); |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1595 | network.ibss_dfs = NULL; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | spin_unlock_irqrestore(&ieee->lock, flags); |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1599 | |
Pete Zaitcev | 4832843 | 2006-02-26 23:43:20 -0800 | [diff] [blame] | 1600 | if (is_beacon(beacon->header.frame_ctl)) { |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1601 | if (ieee->handle_beacon != NULL) |
Hong Liu | 72df16f | 2006-03-08 10:50:20 +0800 | [diff] [blame] | 1602 | ieee->handle_beacon(dev, beacon, target); |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1603 | } else { |
| 1604 | if (ieee->handle_probe_response != NULL) |
Hong Liu | 72df16f | 2006-03-08 10:50:20 +0800 | [diff] [blame] | 1605 | ieee->handle_probe_response(dev, beacon, target); |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1606 | } |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1607 | } |
| 1608 | |
| 1609 | void ieee80211_rx_mgt(struct ieee80211_device *ieee, |
James Ketrenos | ee34af3 | 2005-09-21 11:54:36 -0500 | [diff] [blame] | 1610 | struct ieee80211_hdr_4addr *header, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1611 | struct ieee80211_rx_stats *stats) |
| 1612 | { |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1613 | switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) { |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1614 | case IEEE80211_STYPE_ASSOC_RESP: |
| 1615 | IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1616 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1617 | (header->frame_ctl))); |
James Ketrenos | 9e8571a | 2005-09-21 11:56:33 -0500 | [diff] [blame] | 1618 | ieee80211_handle_assoc_resp(ieee, |
| 1619 | (struct ieee80211_assoc_response *) |
| 1620 | header, stats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1621 | break; |
| 1622 | |
| 1623 | case IEEE80211_STYPE_REASSOC_RESP: |
| 1624 | IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1625 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1626 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1627 | break; |
| 1628 | |
James Ketrenos | 42c94e4 | 2005-09-21 11:58:29 -0500 | [diff] [blame] | 1629 | case IEEE80211_STYPE_PROBE_REQ: |
Larry Finger | 1a1fedf | 2006-01-30 09:42:24 -0600 | [diff] [blame] | 1630 | IEEE80211_DEBUG_MGMT("received auth (%d)\n", |
James Ketrenos | 42c94e4 | 2005-09-21 11:58:29 -0500 | [diff] [blame] | 1631 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1632 | (header->frame_ctl))); |
| 1633 | |
| 1634 | if (ieee->handle_probe_request != NULL) |
| 1635 | ieee->handle_probe_request(ieee->dev, |
| 1636 | (struct |
| 1637 | ieee80211_probe_request *) |
| 1638 | header, stats); |
| 1639 | break; |
| 1640 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1641 | case IEEE80211_STYPE_PROBE_RESP: |
| 1642 | IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1643 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1644 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1645 | IEEE80211_DEBUG_SCAN("Probe response\n"); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1646 | ieee80211_process_probe_response(ieee, |
| 1647 | (struct |
| 1648 | ieee80211_probe_response *) |
| 1649 | header, stats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1650 | break; |
| 1651 | |
| 1652 | case IEEE80211_STYPE_BEACON: |
| 1653 | IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1654 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1655 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1656 | IEEE80211_DEBUG_SCAN("Beacon\n"); |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 1657 | ieee80211_process_probe_response(ieee, |
| 1658 | (struct |
| 1659 | ieee80211_probe_response *) |
| 1660 | header, stats); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1661 | break; |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1662 | case IEEE80211_STYPE_AUTH: |
| 1663 | |
Larry Finger | 1a1fedf | 2006-01-30 09:42:24 -0600 | [diff] [blame] | 1664 | IEEE80211_DEBUG_MGMT("received auth (%d)\n", |
James Ketrenos | 3f552bb | 2005-09-21 11:54:47 -0500 | [diff] [blame] | 1665 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1666 | (header->frame_ctl))); |
| 1667 | |
| 1668 | if (ieee->handle_auth != NULL) |
| 1669 | ieee->handle_auth(ieee->dev, |
| 1670 | (struct ieee80211_auth *)header); |
| 1671 | break; |
| 1672 | |
| 1673 | case IEEE80211_STYPE_DISASSOC: |
| 1674 | if (ieee->handle_disassoc != NULL) |
| 1675 | ieee->handle_disassoc(ieee->dev, |
| 1676 | (struct ieee80211_disassoc *) |
| 1677 | header); |
| 1678 | break; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1679 | |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1680 | case IEEE80211_STYPE_ACTION: |
| 1681 | IEEE80211_DEBUG_MGMT("ACTION\n"); |
| 1682 | if (ieee->handle_action) |
| 1683 | ieee->handle_action(ieee->dev, |
| 1684 | (struct ieee80211_action *) |
| 1685 | header, stats); |
| 1686 | break; |
| 1687 | |
Larry Finger | 2f633db | 2006-01-30 23:25:10 -0600 | [diff] [blame] | 1688 | case IEEE80211_STYPE_REASSOC_REQ: |
| 1689 | IEEE80211_DEBUG_MGMT("received reassoc (%d)\n", |
| 1690 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1691 | (header->frame_ctl))); |
| 1692 | |
Zhu Yi | 7736b5b | 2006-04-13 17:17:47 +0800 | [diff] [blame^] | 1693 | IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n", |
| 1694 | ieee->dev->name); |
Larry Finger | 2f633db | 2006-01-30 23:25:10 -0600 | [diff] [blame] | 1695 | if (ieee->handle_reassoc_request != NULL) |
| 1696 | ieee->handle_reassoc_request(ieee->dev, |
| 1697 | (struct ieee80211_reassoc_request *) |
| 1698 | header); |
| 1699 | break; |
| 1700 | |
| 1701 | case IEEE80211_STYPE_ASSOC_REQ: |
| 1702 | IEEE80211_DEBUG_MGMT("received assoc (%d)\n", |
| 1703 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1704 | (header->frame_ctl))); |
| 1705 | |
Zhu Yi | 7736b5b | 2006-04-13 17:17:47 +0800 | [diff] [blame^] | 1706 | IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n", |
| 1707 | ieee->dev->name); |
Larry Finger | 2f633db | 2006-01-30 23:25:10 -0600 | [diff] [blame] | 1708 | if (ieee->handle_assoc_request != NULL) |
| 1709 | ieee->handle_assoc_request(ieee->dev); |
| 1710 | break; |
| 1711 | |
James Ketrenos | 31b59ea | 2005-09-21 11:58:49 -0500 | [diff] [blame] | 1712 | case IEEE80211_STYPE_DEAUTH: |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1713 | IEEE80211_DEBUG_MGMT("DEAUTH\n"); |
James Ketrenos | 31b59ea | 2005-09-21 11:58:49 -0500 | [diff] [blame] | 1714 | if (ieee->handle_deauth != NULL) |
Zhu Yi | d1b46b0 | 2006-01-19 16:22:15 +0800 | [diff] [blame] | 1715 | ieee->handle_deauth(ieee->dev, |
| 1716 | (struct ieee80211_deauth *) |
James Ketrenos | 31b59ea | 2005-09-21 11:58:49 -0500 | [diff] [blame] | 1717 | header); |
| 1718 | break; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1719 | default: |
| 1720 | IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n", |
James Ketrenos | fd27817 | 2005-09-13 17:25:51 -0500 | [diff] [blame] | 1721 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1722 | (header->frame_ctl))); |
Zhu Yi | 7736b5b | 2006-04-13 17:17:47 +0800 | [diff] [blame^] | 1723 | IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n", |
| 1724 | ieee->dev->name, |
| 1725 | WLAN_FC_GET_STYPE(le16_to_cpu |
| 1726 | (header->frame_ctl))); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1727 | break; |
| 1728 | } |
| 1729 | } |
| 1730 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1731 | EXPORT_SYMBOL(ieee80211_rx_mgt); |
| 1732 | EXPORT_SYMBOL(ieee80211_rx); |