2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004-2005, Intel Corporation
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
16 #include <linux/compiler.h>
17 #include <linux/errno.h>
18 #include <linux/if_arp.h>
19 #include <linux/in6.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/netdevice.h>
25 #include <linux/proc_fs.h>
26 #include <linux/skbuff.h>
27 #include <linux/slab.h>
28 #include <linux/tcp.h>
29 #include <linux/types.h>
30 #include <linux/wireless.h>
31 #include <linux/etherdevice.h>
32 #include <asm/uaccess.h>
33 #include <linux/ctype.h>
35 #include <net/ieee80211.h>
37 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
39 struct ieee80211_rx_stats *rx_stats)
41 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
42 u16 fc = le16_to_cpu(hdr->frame_ctl);
45 skb->mac.raw = skb->data;
46 skb_pull(skb, ieee80211_get_hdrlen(fc));
47 skb->pkt_type = PACKET_OTHERHOST;
48 skb->protocol = __constant_htons(ETH_P_80211_RAW);
49 memset(skb->cb, 0, sizeof(skb->cb));
53 /* Called only as a tasklet (software IRQ) */
54 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
62 struct ieee80211_frag_entry *entry;
65 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
66 entry = &ieee->frag_cache[i];
67 if (entry->skb != NULL &&
68 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
69 IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
70 "seq=%u last_frag=%u\n",
71 entry->seq, entry->last_frag);
72 dev_kfree_skb_any(entry->skb);
76 if (entry->skb != NULL && entry->seq == seq &&
77 (entry->last_frag + 1 == frag || frag == -1) &&
78 !compare_ether_addr(entry->src_addr, src) &&
79 !compare_ether_addr(entry->dst_addr, dst))
86 /* Called only as a tasklet (software IRQ) */
87 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
88 struct ieee80211_hdr_4addr *hdr)
90 struct sk_buff *skb = NULL;
92 unsigned int frag, seq;
93 struct ieee80211_frag_entry *entry;
95 sc = le16_to_cpu(hdr->seq_ctl);
96 frag = WLAN_GET_SEQ_FRAG(sc);
97 seq = WLAN_GET_SEQ_SEQ(sc);
100 /* Reserve enough space to fit maximum frame length */
101 skb = dev_alloc_skb(ieee->dev->mtu +
102 sizeof(struct ieee80211_hdr_4addr) +
105 8 /* WEP */ + ETH_ALEN /* WDS */ );
109 entry = &ieee->frag_cache[ieee->frag_next_idx];
110 ieee->frag_next_idx++;
111 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
112 ieee->frag_next_idx = 0;
114 if (entry->skb != NULL)
115 dev_kfree_skb_any(entry->skb);
117 entry->first_frag_time = jiffies;
119 entry->last_frag = frag;
121 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
122 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
124 /* received a fragment of a frame for which the head fragment
125 * should have already been received */
126 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
129 entry->last_frag = frag;
137 /* Called only as a tasklet (software IRQ) */
138 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
139 struct ieee80211_hdr_4addr *hdr)
143 struct ieee80211_frag_entry *entry;
145 sc = le16_to_cpu(hdr->seq_ctl);
146 seq = WLAN_GET_SEQ_SEQ(sc);
148 entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
152 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
153 "entry (seq=%u)\n", seq);
162 /* ieee80211_rx_frame_mgtmt
164 * Responsible for handling management control frames
166 * Called by ieee80211_rx */
168 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
169 struct ieee80211_rx_stats *rx_stats, u16 type,
172 if (ieee->iw_mode == IW_MODE_MASTER) {
173 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
177 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
181 if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
182 if (stype == WLAN_FC_STYPE_BEACON &&
183 ieee->iw_mode == IW_MODE_MASTER) {
184 struct sk_buff *skb2;
185 /* Process beacon frames also in kernel driver to
186 * update STA(AP) table statistics */
187 skb2 = skb_clone(skb, GFP_ATOMIC);
189 hostap_rx(skb2->dev, skb2, rx_stats);
192 /* send management frames to the user space daemon for
194 ieee->apdevstats.rx_packets++;
195 ieee->apdevstats.rx_bytes += skb->len;
196 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
200 if (ieee->iw_mode == IW_MODE_MASTER) {
201 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
202 printk(KERN_DEBUG "%s: unknown management frame "
203 "(type=0x%02x, stype=0x%02x) dropped\n",
204 skb->dev->name, type, stype);
208 hostap_rx(skb->dev, skb, rx_stats);
212 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
213 "received in non-Host AP mode\n", skb->dev->name);
218 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
219 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
220 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
222 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
223 static unsigned char bridge_tunnel_header[] =
224 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
225 /* No encapsulation header if EtherType < 0x600 (=length) */
227 /* Called by ieee80211_rx_frame_decrypt */
228 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
231 struct net_device *dev = ieee->dev;
233 struct ieee80211_hdr_3addr *hdr;
239 hdr = (struct ieee80211_hdr_3addr *)skb->data;
240 fc = le16_to_cpu(hdr->frame_ctl);
242 /* check that the frame is unicast frame to us */
243 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
244 IEEE80211_FCTL_TODS &&
245 !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
246 !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
247 /* ToDS frame with own addr BSSID and DA */
248 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
249 IEEE80211_FCTL_FROMDS &&
250 !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
251 /* FromDS frame with own addr as DA */
255 if (skb->len < 24 + 8)
258 /* check for port access entity Ethernet type */
259 pos = skb->data + 24;
260 ethertype = (pos[6] << 8) | pos[7];
261 if (ethertype == ETH_P_PAE)
267 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
269 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
270 struct ieee80211_crypt_data *crypt)
272 struct ieee80211_hdr_3addr *hdr;
275 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
278 hdr = (struct ieee80211_hdr_3addr *)skb->data;
279 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
281 atomic_inc(&crypt->refcnt);
282 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
283 atomic_dec(&crypt->refcnt);
285 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
286 ") res=%d\n", MAC_ARG(hdr->addr2), res);
288 IEEE80211_DEBUG_DROP("Decryption failed ICV "
289 "mismatch (key %d)\n",
290 skb->data[hdrlen + 3] >> 6);
291 ieee->ieee_stats.rx_discards_undecryptable++;
298 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
300 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
301 struct sk_buff *skb, int keyidx,
302 struct ieee80211_crypt_data *crypt)
304 struct ieee80211_hdr_3addr *hdr;
307 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
310 hdr = (struct ieee80211_hdr_3addr *)skb->data;
311 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
313 atomic_inc(&crypt->refcnt);
314 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
315 atomic_dec(&crypt->refcnt);
317 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
318 " (SA=" MAC_FMT " keyidx=%d)\n",
319 ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
326 /* All received frames are sent to this function. @skb contains the frame in
327 * IEEE 802.11 format, i.e., in the format it was sent over air.
328 * This function is called only as a tasklet (software IRQ). */
329 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
330 struct ieee80211_rx_stats *rx_stats)
332 struct net_device *dev = ieee->dev;
333 struct ieee80211_hdr_4addr *hdr;
335 u16 fc, type, stype, sc;
336 struct net_device_stats *stats;
341 struct net_device *wds = NULL;
342 struct sk_buff *skb2 = NULL;
343 struct net_device *wds = NULL;
344 int frame_authorized = 0;
345 int from_assoc_ap = 0;
350 struct ieee80211_crypt_data *crypt = NULL;
352 int can_be_decrypted = 0;
354 hdr = (struct ieee80211_hdr_4addr *)skb->data;
355 stats = &ieee->stats;
358 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
362 fc = le16_to_cpu(hdr->frame_ctl);
363 type = WLAN_FC_GET_TYPE(fc);
364 stype = WLAN_FC_GET_STYPE(fc);
365 sc = le16_to_cpu(hdr->seq_ctl);
366 frag = WLAN_GET_SEQ_FRAG(sc);
367 hdrlen = ieee80211_get_hdrlen(fc);
369 /* Put this code here so that we avoid duplicating it in all
370 * Rx paths. - Jean II */
371 #ifdef CONFIG_WIRELESS_EXT
372 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
373 /* If spy monitoring on */
374 if (ieee->spy_data.spy_number > 0) {
375 struct iw_quality wstats;
378 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
379 wstats.level = rx_stats->rssi;
380 wstats.updated |= IW_QUAL_LEVEL_UPDATED;
382 wstats.updated |= IW_QUAL_LEVEL_INVALID;
384 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
385 wstats.noise = rx_stats->noise;
386 wstats.updated |= IW_QUAL_NOISE_UPDATED;
388 wstats.updated |= IW_QUAL_NOISE_INVALID;
390 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
391 wstats.qual = rx_stats->signal;
392 wstats.updated |= IW_QUAL_QUAL_UPDATED;
394 wstats.updated |= IW_QUAL_QUAL_INVALID;
396 /* Update spy records */
397 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
399 #endif /* IW_WIRELESS_SPY */
400 #endif /* CONFIG_WIRELESS_EXT */
403 hostap_update_rx_stats(local->ap, hdr, rx_stats);
406 if (ieee->iw_mode == IW_MODE_MONITOR) {
408 stats->rx_bytes += skb->len;
409 ieee80211_monitor_rx(ieee, skb, rx_stats);
413 can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
414 is_broadcast_ether_addr(hdr->addr2)) ?
415 ieee->host_mc_decrypt : ieee->host_decrypt;
417 if (can_be_decrypted) {
418 if (skb->len >= hdrlen + 3) {
419 /* Top two-bits of byte 3 are the key index */
420 keyidx = skb->data[hdrlen + 3] >> 6;
423 /* ieee->crypt[] is WEP_KEY (4) in length. Given that keyidx
424 * is only allowed 2-bits of storage, no value of keyidx can
425 * be provided via above code that would result in keyidx
426 * being out of range */
427 crypt = ieee->crypt[keyidx];
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). */
439 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
440 (void)hostap_handle_sta_crypto(local, hdr, &crypt,
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))
450 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
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
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++;
463 if (type != WLAN_FC_TYPE_DATA) {
464 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
465 fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
466 (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
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 */
475 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
482 /* Data frame - extract src/dst addresses */
483 if (skb->len < IEEE80211_3ADDR_LEN)
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);
491 case IEEE80211_FCTL_TODS:
492 memcpy(dst, hdr->addr3, ETH_ALEN);
493 memcpy(src, hdr->addr2, ETH_ALEN);
495 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
496 if (skb->len < IEEE80211_4ADDR_LEN)
498 memcpy(dst, hdr->addr3, ETH_ALEN);
499 memcpy(src, hdr->addr4, ETH_ALEN);
502 memcpy(dst, hdr->addr1, ETH_ALEN);
503 memcpy(src, hdr->addr2, ETH_ALEN);
508 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
511 skb->dev = dev = wds;
512 stats = hostap_get_stats(dev);
515 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
516 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
517 IEEE80211_FCTL_FROMDS && ieee->stadev
518 && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
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);
526 dev->last_rx = jiffies;
529 if ((ieee->iw_mode == IW_MODE_MASTER ||
530 ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
531 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
533 case AP_RX_CONTINUE_NOT_AUTHORIZED:
534 frame_authorized = 0;
537 frame_authorized = 1;
547 /* Nullfunc frames may have PS-bit set, so they must be passed to
548 * hostap_handle_sta_rx() before being dropped here. */
550 stype &= ~IEEE80211_STYPE_QOS_DATA;
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)
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);
564 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
566 if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
567 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
570 hdr = (struct ieee80211_hdr_4addr *)skb->data;
572 /* skb: hdr + (possibly fragmented) plaintext payload */
573 // PR: FIXME: hostap has additional conditions in the "if" below:
574 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
575 if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
577 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
578 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
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);
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",
597 ieee80211_frag_cache_invalidate(ieee, hdr);
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);
606 /* append frame payload to the end of the fragment
608 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
611 dev_kfree_skb_any(skb);
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 */
621 /* this was the last fragment and the frame will be
622 * delivered, so remove skb from fragment cache */
624 hdr = (struct ieee80211_hdr_4addr *)skb->data;
625 ieee80211_frag_cache_invalidate(ieee, hdr);
628 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
629 * encrypted/authenticated */
630 if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
631 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
634 hdr = (struct ieee80211_hdr_4addr *)skb->data;
635 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
636 if ( /*ieee->ieee802_1x && */
637 ieee80211_is_eapol_frame(ieee, skb)) {
638 /* pass unencrypted EAPOL frames even if encryption is
641 IEEE80211_DEBUG_DROP("encryption configured, but RX "
642 "frame not encrypted (SA=" MAC_FMT
643 ")\n", MAC_ARG(hdr->addr2));
648 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
649 !ieee80211_is_eapol_frame(ieee, skb)) {
650 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
651 "frame from " MAC_FMT
652 " (drop_unencrypted=1)\n",
653 MAC_ARG(hdr->addr2));
657 /* If the frame was decrypted in hardware, we may need to strip off
658 * any security data (IV, ICV, etc) that was left behind */
659 if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
660 ieee->host_strip_iv_icv) {
663 /* Top two-bits of byte 3 are the key index */
664 if (skb->len >= hdrlen + 3)
665 keyidx = skb->data[hdrlen + 3] >> 6;
667 /* To strip off any security data which appears before the
668 * payload, we simply increase hdrlen (as the header gets
669 * chopped off immediately below). For the security data which
670 * appears after the payload, we use skb_trim. */
672 switch (ieee->sec.encode_alg[keyidx]) {
680 /* 4 byte IV, 4 byte ExtIV */
682 /* 8 byte MIC, 4 byte ICV */
686 /* 8 byte CCMP header */
693 if (skb->len < trimlen)
696 __skb_trim(skb, skb->len - trimlen);
698 if (skb->len < hdrlen)
702 /* skb: hdr + (possible reassembled) full plaintext payload */
704 payload = skb->data + hdrlen;
705 ethertype = (payload[6] << 8) | payload[7];
708 /* If IEEE 802.1X is used, check whether the port is authorized to send
709 * the received frame. */
710 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
711 if (ethertype == ETH_P_PAE) {
712 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
714 if (ieee->hostapd && ieee->apdev) {
715 /* Send IEEE 802.1X frames to the user
716 * space daemon for processing */
717 prism2_rx_80211(ieee->apdev, skb, rx_stats,
719 ieee->apdevstats.rx_packets++;
720 ieee->apdevstats.rx_bytes += skb->len;
723 } else if (!frame_authorized) {
724 printk(KERN_DEBUG "%s: dropped frame from "
725 "unauthorized port (IEEE 802.1X): "
726 "ethertype=0x%04x\n", dev->name, ethertype);
732 /* convert hdr + possible LLC headers into Ethernet header */
733 if (skb->len - hdrlen >= 8 &&
734 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
735 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
736 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
737 /* remove RFC1042 or Bridge-Tunnel encapsulation and
738 * replace EtherType */
739 skb_pull(skb, hdrlen + SNAP_SIZE);
740 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
741 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
744 /* Leave Ethernet header part of hdr and full payload */
745 skb_pull(skb, hdrlen);
746 len = htons(skb->len);
747 memcpy(skb_push(skb, 2), &len, 2);
748 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
749 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
753 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
754 IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
755 /* Non-standard frame: get addr4 from its bogus location after
757 memcpy(skb->data + ETH_ALEN,
758 skb->data + skb->len - ETH_ALEN, ETH_ALEN);
759 skb_trim(skb, skb->len - ETH_ALEN);
764 stats->rx_bytes += skb->len;
767 if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
769 /* copy multicast frame both to the higher layers and
770 * to the wireless media */
771 ieee->ap->bridged_multicast++;
772 skb2 = skb_clone(skb, GFP_ATOMIC);
774 printk(KERN_DEBUG "%s: skb_clone failed for "
775 "multicast frame\n", dev->name);
776 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
777 /* send frame directly to the associated STA using
778 * wireless media and not passing to higher layers */
779 ieee->ap->bridged_unicast++;
786 /* send to wireless media */
787 skb2->protocol = __constant_htons(ETH_P_802_3);
788 skb2->mac.raw = skb2->nh.raw = skb2->data;
789 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
791 dev_queue_xmit(skb2);
796 skb->protocol = eth_type_trans(skb, dev);
797 memset(skb->cb, 0, sizeof(skb->cb));
799 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
800 if (netif_rx(skb) == NET_RX_DROP) {
801 /* netif_rx always succeeds, but it might drop
802 * the packet. If it drops the packet, we log that
805 ("RX: netif_rx dropped the packet\n");
813 hostap_handle_sta_release(sta);
820 /* Returning 0 indicates to caller that we have not handled the SKB--
821 * so it is still allocated and can be used again by underlying
822 * hardware as a DMA target */
826 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
827 * This function takes over the skb, it should not be used again after calling
829 void ieee80211_rx_any(struct ieee80211_device *ieee,
830 struct sk_buff *skb, struct ieee80211_rx_stats *stats)
832 struct ieee80211_hdr_4addr *hdr;
833 int is_packet_for_us;
836 if (ieee->iw_mode == IW_MODE_MONITOR) {
837 if (!ieee80211_rx(ieee, skb, stats))
838 dev_kfree_skb_irq(skb);
842 if (skb->len < sizeof(struct ieee80211_hdr))
845 hdr = (struct ieee80211_hdr_4addr *)skb->data;
846 fc = le16_to_cpu(hdr->frame_ctl);
848 if ((fc & IEEE80211_FCTL_VERS) != 0)
851 switch (fc & IEEE80211_FCTL_FTYPE) {
852 case IEEE80211_FTYPE_MGMT:
853 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
855 ieee80211_rx_mgt(ieee, hdr, stats);
856 dev_kfree_skb_irq(skb);
858 case IEEE80211_FTYPE_DATA:
860 case IEEE80211_FTYPE_CTL:
866 is_packet_for_us = 0;
867 switch (ieee->iw_mode) {
869 /* our BSS and not from/to DS */
870 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
871 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
872 /* promisc: get all */
873 if (ieee->dev->flags & IFF_PROMISC)
874 is_packet_for_us = 1;
876 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
877 is_packet_for_us = 1;
879 else if (is_multicast_ether_addr(hdr->addr1))
880 is_packet_for_us = 1;
884 /* our BSS (== from our AP) and from DS */
885 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
886 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
887 /* promisc: get all */
888 if (ieee->dev->flags & IFF_PROMISC)
889 is_packet_for_us = 1;
891 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
892 is_packet_for_us = 1;
894 else if (is_multicast_ether_addr(hdr->addr1)) {
895 /* not our own packet bcasted from AP */
896 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
897 is_packet_for_us = 1;
906 if (is_packet_for_us)
907 if (!ieee80211_rx(ieee, skb, stats))
908 dev_kfree_skb_irq(skb);
912 dev_kfree_skb_irq(skb);
913 ieee->stats.rx_dropped++;
917 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
919 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
922 * Make ther structure we read from the beacon packet has
925 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
926 *info_element, int sub_type)
929 if (info_element->qui_subtype != sub_type)
931 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
933 if (info_element->qui_type != QOS_OUI_TYPE)
935 if (info_element->version != QOS_VERSION_1)
942 * Parse a QoS parameter element
944 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
945 *element_param, struct ieee80211_info_element
949 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
951 if ((info_element == NULL) || (element_param == NULL))
954 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
955 memcpy(element_param->info_element.qui, info_element->data,
957 element_param->info_element.elementID = info_element->id;
958 element_param->info_element.length = info_element->len;
962 ret = ieee80211_verify_qos_info(&element_param->info_element,
963 QOS_OUI_PARAM_SUB_TYPE);
968 * Parse a QoS information element
970 static int ieee80211_read_qos_info_element(struct
971 ieee80211_qos_information_element
972 *element_info, struct ieee80211_info_element
976 u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
978 if (element_info == NULL)
980 if (info_element == NULL)
983 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
984 memcpy(element_info->qui, info_element->data,
986 element_info->elementID = info_element->id;
987 element_info->length = info_element->len;
992 ret = ieee80211_verify_qos_info(element_info,
993 QOS_OUI_INFO_SUB_TYPE);
998 * Write QoS parameters from the ac parameters.
1000 static int ieee80211_qos_convert_ac_to_parameters(struct
1001 ieee80211_qos_parameter_info
1003 ieee80211_qos_parameters
1008 struct ieee80211_qos_ac_parameter *ac_params;
1013 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1014 ac_params = &(param_elm->ac_params_record[i]);
1016 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1017 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1019 cw_min = ac_params->ecw_min_max & 0x0F;
1020 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
1022 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1023 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
1025 qos_param->flag[i] =
1026 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1028 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1029 qos_param->tx_op_limit[i] = (u16) txop;
1035 * we have a generic data element which it may contain QoS information or
1036 * parameters element. check the information element length to decide
1037 * which type to read
1039 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1041 struct ieee80211_network *network)
1044 struct ieee80211_qos_parameters *qos_param = NULL;
1045 struct ieee80211_qos_information_element qos_info_element;
1047 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1050 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1051 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1053 struct ieee80211_qos_parameter_info param_element;
1055 rc = ieee80211_read_qos_param_element(¶m_element,
1058 qos_param = &(network->qos_data.parameters);
1059 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1061 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1062 network->qos_data.param_count =
1063 param_element.info_element.ac_info & 0x0F;
1068 IEEE80211_DEBUG_QOS("QoS is supported\n");
1069 network->qos_data.supported = 1;
1074 #ifdef CONFIG_IEEE80211_DEBUG
1075 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1077 static const char *get_info_element_string(u16 id)
1082 MFIE_STRING(FH_SET);
1083 MFIE_STRING(DS_SET);
1084 MFIE_STRING(CF_SET);
1086 MFIE_STRING(IBSS_SET);
1087 MFIE_STRING(COUNTRY);
1088 MFIE_STRING(HOP_PARAMS);
1089 MFIE_STRING(HOP_TABLE);
1090 MFIE_STRING(REQUEST);
1091 MFIE_STRING(CHALLENGE);
1092 MFIE_STRING(POWER_CONSTRAINT);
1093 MFIE_STRING(POWER_CAPABILITY);
1094 MFIE_STRING(TPC_REQUEST);
1095 MFIE_STRING(TPC_REPORT);
1096 MFIE_STRING(SUPP_CHANNELS);
1098 MFIE_STRING(MEASURE_REQUEST);
1099 MFIE_STRING(MEASURE_REPORT);
1101 MFIE_STRING(IBSS_DFS);
1102 MFIE_STRING(ERP_INFO);
1104 MFIE_STRING(RATES_EX);
1105 MFIE_STRING(GENERIC);
1106 MFIE_STRING(QOS_PARAMETER);
1113 static int ieee80211_parse_info_param(struct ieee80211_info_element
1114 *info_element, u16 length,
1115 struct ieee80211_network *network)
1118 #ifdef CONFIG_IEEE80211_DEBUG
1123 while (length >= sizeof(*info_element)) {
1124 if (sizeof(*info_element) + info_element->len > length) {
1125 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1126 "info_element->len + 2 > left : "
1127 "info_element->len+2=%zd left=%d, id=%d.\n",
1129 sizeof(*info_element),
1130 length, info_element->id);
1131 /* We stop processing but don't return an error here
1132 * because some misbehaviour APs break this rule. ie.
1133 * Orinoco AP1000. */
1137 switch (info_element->id) {
1138 case MFIE_TYPE_SSID:
1139 if (ieee80211_is_empty_essid(info_element->data,
1140 info_element->len)) {
1141 network->flags |= NETWORK_EMPTY_ESSID;
1145 network->ssid_len = min(info_element->len,
1146 (u8) IW_ESSID_MAX_SIZE);
1147 memcpy(network->ssid, info_element->data,
1149 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1150 memset(network->ssid + network->ssid_len, 0,
1151 IW_ESSID_MAX_SIZE - network->ssid_len);
1153 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1154 network->ssid, network->ssid_len);
1157 case MFIE_TYPE_RATES:
1158 #ifdef CONFIG_IEEE80211_DEBUG
1161 network->rates_len = min(info_element->len,
1163 for (i = 0; i < network->rates_len; i++) {
1164 network->rates[i] = info_element->data[i];
1165 #ifdef CONFIG_IEEE80211_DEBUG
1166 p += snprintf(p, sizeof(rates_str) -
1167 (p - rates_str), "%02X ",
1170 if (ieee80211_is_ofdm_rate
1171 (info_element->data[i])) {
1172 network->flags |= NETWORK_HAS_OFDM;
1173 if (info_element->data[i] &
1174 IEEE80211_BASIC_RATE_MASK)
1180 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1181 rates_str, network->rates_len);
1184 case MFIE_TYPE_RATES_EX:
1185 #ifdef CONFIG_IEEE80211_DEBUG
1188 network->rates_ex_len = min(info_element->len,
1189 MAX_RATES_EX_LENGTH);
1190 for (i = 0; i < network->rates_ex_len; i++) {
1191 network->rates_ex[i] = info_element->data[i];
1192 #ifdef CONFIG_IEEE80211_DEBUG
1193 p += snprintf(p, sizeof(rates_str) -
1194 (p - rates_str), "%02X ",
1197 if (ieee80211_is_ofdm_rate
1198 (info_element->data[i])) {
1199 network->flags |= NETWORK_HAS_OFDM;
1200 if (info_element->data[i] &
1201 IEEE80211_BASIC_RATE_MASK)
1207 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1208 rates_str, network->rates_ex_len);
1211 case MFIE_TYPE_DS_SET:
1212 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1213 info_element->data[0]);
1214 network->channel = info_element->data[0];
1217 case MFIE_TYPE_FH_SET:
1218 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1221 case MFIE_TYPE_CF_SET:
1222 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1226 network->tim.tim_count = info_element->data[0];
1227 network->tim.tim_period = info_element->data[1];
1228 IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1231 case MFIE_TYPE_ERP_INFO:
1232 network->erp_value = info_element->data[0];
1233 network->flags |= NETWORK_HAS_ERP_VALUE;
1234 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1235 network->erp_value);
1238 case MFIE_TYPE_IBSS_SET:
1239 network->atim_window = info_element->data[0];
1240 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1241 network->atim_window);
1244 case MFIE_TYPE_CHALLENGE:
1245 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1248 case MFIE_TYPE_GENERIC:
1249 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1251 if (!ieee80211_parse_qos_info_param_IE(info_element,
1255 if (info_element->len >= 4 &&
1256 info_element->data[0] == 0x00 &&
1257 info_element->data[1] == 0x50 &&
1258 info_element->data[2] == 0xf2 &&
1259 info_element->data[3] == 0x01) {
1260 network->wpa_ie_len = min(info_element->len + 2,
1262 memcpy(network->wpa_ie, info_element,
1263 network->wpa_ie_len);
1268 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1270 network->rsn_ie_len = min(info_element->len + 2,
1272 memcpy(network->rsn_ie, info_element,
1273 network->rsn_ie_len);
1276 case MFIE_TYPE_QOS_PARAMETER:
1278 "QoS Error need to parse QOS_PARAMETER IE\n");
1281 case MFIE_TYPE_POWER_CONSTRAINT:
1282 network->power_constraint = info_element->data[0];
1283 network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1287 network->power_constraint = info_element->data[0];
1288 network->flags |= NETWORK_HAS_CSA;
1291 case MFIE_TYPE_QUIET:
1292 network->quiet.count = info_element->data[0];
1293 network->quiet.period = info_element->data[1];
1294 network->quiet.duration = info_element->data[2];
1295 network->quiet.offset = info_element->data[3];
1296 network->flags |= NETWORK_HAS_QUIET;
1299 case MFIE_TYPE_IBSS_DFS:
1300 if (network->ibss_dfs)
1303 kmalloc(info_element->len, GFP_ATOMIC);
1304 if (!network->ibss_dfs)
1306 memcpy(network->ibss_dfs, info_element->data,
1308 network->flags |= NETWORK_HAS_IBSS_DFS;
1311 case MFIE_TYPE_TPC_REPORT:
1312 network->tpc_report.transmit_power =
1313 info_element->data[0];
1314 network->tpc_report.link_margin = info_element->data[1];
1315 network->flags |= NETWORK_HAS_TPC_REPORT;
1319 IEEE80211_DEBUG_MGMT
1320 ("Unsupported info element: %s (%d)\n",
1321 get_info_element_string(info_element->id),
1326 length -= sizeof(*info_element) + info_element->len;
1328 (struct ieee80211_info_element *)&info_element->
1329 data[info_element->len];
1335 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1336 *frame, struct ieee80211_rx_stats *stats)
1338 struct ieee80211_network network_resp = {
1341 struct ieee80211_network *network = &network_resp;
1342 struct net_device *dev = ieee->dev;
1345 network->qos_data.active = 0;
1346 network->qos_data.supported = 0;
1347 network->qos_data.param_count = 0;
1348 network->qos_data.old_param_count = 0;
1350 //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1351 network->atim_window = le16_to_cpu(frame->aid);
1352 network->listen_interval = le16_to_cpu(frame->status);
1353 memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1354 network->capability = le16_to_cpu(frame->capability);
1355 network->last_scanned = jiffies;
1356 network->rates_len = network->rates_ex_len = 0;
1357 network->last_associate = 0;
1358 network->ssid_len = 0;
1359 network->erp_value =
1360 (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1362 if (stats->freq == IEEE80211_52GHZ_BAND) {
1363 /* for A band (No DS info) */
1364 network->channel = stats->received_channel;
1366 network->flags |= NETWORK_HAS_CCK;
1368 network->wpa_ie_len = 0;
1369 network->rsn_ie_len = 0;
1371 if (ieee80211_parse_info_param
1372 (frame->info_element, stats->len - sizeof(*frame), network))
1376 if (stats->freq == IEEE80211_52GHZ_BAND)
1377 network->mode = IEEE_A;
1379 if (network->flags & NETWORK_HAS_OFDM)
1380 network->mode |= IEEE_G;
1381 if (network->flags & NETWORK_HAS_CCK)
1382 network->mode |= IEEE_B;
1385 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1386 network->flags |= NETWORK_EMPTY_ESSID;
1388 memcpy(&network->stats, stats, sizeof(network->stats));
1390 if (ieee->handle_assoc_response != NULL)
1391 ieee->handle_assoc_response(dev, frame, network);
1396 /***************************************************/
1398 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1400 struct ieee80211_network *network,
1401 struct ieee80211_rx_stats *stats)
1403 network->qos_data.active = 0;
1404 network->qos_data.supported = 0;
1405 network->qos_data.param_count = 0;
1406 network->qos_data.old_param_count = 0;
1408 /* Pull out fixed field data */
1409 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1410 network->capability = le16_to_cpu(beacon->capability);
1411 network->last_scanned = jiffies;
1412 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1413 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1414 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1415 /* Where to pull this? beacon->listen_interval; */
1416 network->listen_interval = 0x0A;
1417 network->rates_len = network->rates_ex_len = 0;
1418 network->last_associate = 0;
1419 network->ssid_len = 0;
1421 network->atim_window = 0;
1422 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1425 if (stats->freq == IEEE80211_52GHZ_BAND) {
1426 /* for A band (No DS info) */
1427 network->channel = stats->received_channel;
1429 network->flags |= NETWORK_HAS_CCK;
1431 network->wpa_ie_len = 0;
1432 network->rsn_ie_len = 0;
1434 if (ieee80211_parse_info_param
1435 (beacon->info_element, stats->len - sizeof(*beacon), network))
1439 if (stats->freq == IEEE80211_52GHZ_BAND)
1440 network->mode = IEEE_A;
1442 if (network->flags & NETWORK_HAS_OFDM)
1443 network->mode |= IEEE_G;
1444 if (network->flags & NETWORK_HAS_CCK)
1445 network->mode |= IEEE_B;
1448 if (network->mode == 0) {
1449 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1451 escape_essid(network->ssid,
1453 MAC_ARG(network->bssid));
1457 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1458 network->flags |= NETWORK_EMPTY_ESSID;
1460 memcpy(&network->stats, stats, sizeof(network->stats));
1465 static inline int is_same_network(struct ieee80211_network *src,
1466 struct ieee80211_network *dst)
1468 /* A network is only a duplicate if the channel, BSSID, and ESSID
1469 * all match. We treat all <hidden> with the same BSSID and channel
1471 return ((src->ssid_len == dst->ssid_len) &&
1472 (src->channel == dst->channel) &&
1473 !compare_ether_addr(src->bssid, dst->bssid) &&
1474 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1477 static void update_network(struct ieee80211_network *dst,
1478 struct ieee80211_network *src)
1483 ieee80211_network_reset(dst);
1484 dst->ibss_dfs = src->ibss_dfs;
1486 /* We only update the statistics if they were created by receiving
1487 * the network information on the actual channel the network is on.
1489 * This keeps beacons received on neighbor channels from bringing
1490 * down the signal level of an AP. */
1491 if (dst->channel == src->stats.received_channel)
1492 memcpy(&dst->stats, &src->stats,
1493 sizeof(struct ieee80211_rx_stats));
1495 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1496 "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1497 dst->channel, src->stats.received_channel);
1499 dst->capability = src->capability;
1500 memcpy(dst->rates, src->rates, src->rates_len);
1501 dst->rates_len = src->rates_len;
1502 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1503 dst->rates_ex_len = src->rates_ex_len;
1505 dst->mode = src->mode;
1506 dst->flags = src->flags;
1507 dst->time_stamp[0] = src->time_stamp[0];
1508 dst->time_stamp[1] = src->time_stamp[1];
1510 dst->beacon_interval = src->beacon_interval;
1511 dst->listen_interval = src->listen_interval;
1512 dst->atim_window = src->atim_window;
1513 dst->erp_value = src->erp_value;
1514 dst->tim = src->tim;
1516 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1517 dst->wpa_ie_len = src->wpa_ie_len;
1518 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1519 dst->rsn_ie_len = src->rsn_ie_len;
1521 dst->last_scanned = jiffies;
1522 qos_active = src->qos_data.active;
1523 old_param = dst->qos_data.old_param_count;
1524 if (dst->flags & NETWORK_HAS_QOS_MASK)
1525 memcpy(&dst->qos_data, &src->qos_data,
1526 sizeof(struct ieee80211_qos_data));
1528 dst->qos_data.supported = src->qos_data.supported;
1529 dst->qos_data.param_count = src->qos_data.param_count;
1532 if (dst->qos_data.supported == 1) {
1535 ("QoS the network %s is QoS supported\n",
1539 ("QoS the network is QoS supported\n");
1541 dst->qos_data.active = qos_active;
1542 dst->qos_data.old_param_count = old_param;
1544 /* dst->last_associate is not overwritten */
1547 static inline int is_beacon(__le16 fc)
1549 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1552 static void ieee80211_process_probe_response(struct ieee80211_device
1554 ieee80211_probe_response
1555 *beacon, struct ieee80211_rx_stats
1558 struct net_device *dev = ieee->dev;
1559 struct ieee80211_network network = {
1562 struct ieee80211_network *target;
1563 struct ieee80211_network *oldest = NULL;
1564 #ifdef CONFIG_IEEE80211_DEBUG
1565 struct ieee80211_info_element *info_element = beacon->info_element;
1567 unsigned long flags;
1569 IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1570 "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1571 escape_essid(info_element->data,
1573 MAC_ARG(beacon->header.addr3),
1574 (beacon->capability & (1 << 0xf)) ? '1' : '0',
1575 (beacon->capability & (1 << 0xe)) ? '1' : '0',
1576 (beacon->capability & (1 << 0xd)) ? '1' : '0',
1577 (beacon->capability & (1 << 0xc)) ? '1' : '0',
1578 (beacon->capability & (1 << 0xb)) ? '1' : '0',
1579 (beacon->capability & (1 << 0xa)) ? '1' : '0',
1580 (beacon->capability & (1 << 0x9)) ? '1' : '0',
1581 (beacon->capability & (1 << 0x8)) ? '1' : '0',
1582 (beacon->capability & (1 << 0x7)) ? '1' : '0',
1583 (beacon->capability & (1 << 0x6)) ? '1' : '0',
1584 (beacon->capability & (1 << 0x5)) ? '1' : '0',
1585 (beacon->capability & (1 << 0x4)) ? '1' : '0',
1586 (beacon->capability & (1 << 0x3)) ? '1' : '0',
1587 (beacon->capability & (1 << 0x2)) ? '1' : '0',
1588 (beacon->capability & (1 << 0x1)) ? '1' : '0',
1589 (beacon->capability & (1 << 0x0)) ? '1' : '0');
1591 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1592 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1593 escape_essid(info_element->data,
1595 MAC_ARG(beacon->header.addr3),
1596 is_beacon(beacon->header.frame_ctl) ?
1597 "BEACON" : "PROBE RESPONSE");
1601 /* The network parsed correctly -- so now we scan our known networks
1602 * to see if we can find it in our list.
1604 * NOTE: This search is definitely not optimized. Once its doing
1605 * the "right thing" we'll optimize it for efficiency if
1608 /* Search for this entry in the list and update it if it is
1611 spin_lock_irqsave(&ieee->lock, flags);
1613 list_for_each_entry(target, &ieee->network_list, list) {
1614 if (is_same_network(target, &network))
1617 if ((oldest == NULL) ||
1618 (target->last_scanned < oldest->last_scanned))
1622 /* If we didn't find a match, then get a new network slot to initialize
1623 * with this beacon's information */
1624 if (&target->list == &ieee->network_list) {
1625 if (list_empty(&ieee->network_free_list)) {
1626 /* If there are no more slots, expire the oldest */
1627 list_del(&oldest->list);
1629 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1631 escape_essid(target->ssid,
1633 MAC_ARG(target->bssid));
1634 ieee80211_network_reset(target);
1636 /* Otherwise just pull from the free list */
1637 target = list_entry(ieee->network_free_list.next,
1638 struct ieee80211_network, list);
1639 list_del(ieee->network_free_list.next);
1642 #ifdef CONFIG_IEEE80211_DEBUG
1643 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1644 escape_essid(network.ssid,
1646 MAC_ARG(network.bssid),
1647 is_beacon(beacon->header.frame_ctl) ?
1648 "BEACON" : "PROBE RESPONSE");
1650 memcpy(target, &network, sizeof(*target));
1651 network.ibss_dfs = NULL;
1652 list_add_tail(&target->list, &ieee->network_list);
1654 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1655 escape_essid(target->ssid,
1657 MAC_ARG(target->bssid),
1658 is_beacon(beacon->header.frame_ctl) ?
1659 "BEACON" : "PROBE RESPONSE");
1660 update_network(target, &network);
1661 network.ibss_dfs = NULL;
1664 spin_unlock_irqrestore(&ieee->lock, flags);
1666 if (is_beacon(beacon->header.frame_ctl)) {
1667 if (ieee->handle_beacon != NULL)
1668 ieee->handle_beacon(dev, beacon, target);
1670 if (ieee->handle_probe_response != NULL)
1671 ieee->handle_probe_response(dev, beacon, target);
1675 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1676 struct ieee80211_hdr_4addr *header,
1677 struct ieee80211_rx_stats *stats)
1679 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1680 case IEEE80211_STYPE_ASSOC_RESP:
1681 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1682 WLAN_FC_GET_STYPE(le16_to_cpu
1683 (header->frame_ctl)));
1684 ieee80211_handle_assoc_resp(ieee,
1685 (struct ieee80211_assoc_response *)
1689 case IEEE80211_STYPE_REASSOC_RESP:
1690 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1691 WLAN_FC_GET_STYPE(le16_to_cpu
1692 (header->frame_ctl)));
1695 case IEEE80211_STYPE_PROBE_REQ:
1696 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1697 WLAN_FC_GET_STYPE(le16_to_cpu
1698 (header->frame_ctl)));
1700 if (ieee->handle_probe_request != NULL)
1701 ieee->handle_probe_request(ieee->dev,
1703 ieee80211_probe_request *)
1707 case IEEE80211_STYPE_PROBE_RESP:
1708 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1709 WLAN_FC_GET_STYPE(le16_to_cpu
1710 (header->frame_ctl)));
1711 IEEE80211_DEBUG_SCAN("Probe response\n");
1712 ieee80211_process_probe_response(ieee,
1714 ieee80211_probe_response *)
1718 case IEEE80211_STYPE_BEACON:
1719 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1720 WLAN_FC_GET_STYPE(le16_to_cpu
1721 (header->frame_ctl)));
1722 IEEE80211_DEBUG_SCAN("Beacon\n");
1723 ieee80211_process_probe_response(ieee,
1725 ieee80211_probe_response *)
1728 case IEEE80211_STYPE_AUTH:
1730 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1731 WLAN_FC_GET_STYPE(le16_to_cpu
1732 (header->frame_ctl)));
1734 if (ieee->handle_auth != NULL)
1735 ieee->handle_auth(ieee->dev,
1736 (struct ieee80211_auth *)header);
1739 case IEEE80211_STYPE_DISASSOC:
1740 if (ieee->handle_disassoc != NULL)
1741 ieee->handle_disassoc(ieee->dev,
1742 (struct ieee80211_disassoc *)
1746 case IEEE80211_STYPE_ACTION:
1747 IEEE80211_DEBUG_MGMT("ACTION\n");
1748 if (ieee->handle_action)
1749 ieee->handle_action(ieee->dev,
1750 (struct ieee80211_action *)
1754 case IEEE80211_STYPE_REASSOC_REQ:
1755 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1756 WLAN_FC_GET_STYPE(le16_to_cpu
1757 (header->frame_ctl)));
1759 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1761 if (ieee->handle_reassoc_request != NULL)
1762 ieee->handle_reassoc_request(ieee->dev,
1763 (struct ieee80211_reassoc_request *)
1767 case IEEE80211_STYPE_ASSOC_REQ:
1768 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1769 WLAN_FC_GET_STYPE(le16_to_cpu
1770 (header->frame_ctl)));
1772 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1774 if (ieee->handle_assoc_request != NULL)
1775 ieee->handle_assoc_request(ieee->dev);
1778 case IEEE80211_STYPE_DEAUTH:
1779 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1780 if (ieee->handle_deauth != NULL)
1781 ieee->handle_deauth(ieee->dev,
1782 (struct ieee80211_deauth *)
1786 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1787 WLAN_FC_GET_STYPE(le16_to_cpu
1788 (header->frame_ctl)));
1789 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1791 WLAN_FC_GET_STYPE(le16_to_cpu
1792 (header->frame_ctl)));
1797 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1798 EXPORT_SYMBOL(ieee80211_rx_mgt);
1799 EXPORT_SYMBOL(ieee80211_rx);