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 <j@w1.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/lib80211.h>
37 #include "ieee80211.h"
39 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
41 struct ieee80211_rx_stats *rx_stats)
43 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
44 u16 fc = le16_to_cpu(hdr->frame_control);
47 skb_reset_mac_header(skb);
48 skb_pull(skb, ieee80211_get_hdrlen(fc));
49 skb->pkt_type = PACKET_OTHERHOST;
50 skb->protocol = htons(ETH_P_80211_RAW);
51 memset(skb->cb, 0, sizeof(skb->cb));
55 /* Called only as a tasklet (software IRQ) */
56 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
64 struct ieee80211_frag_entry *entry;
67 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
68 entry = &ieee->frag_cache[i];
69 if (entry->skb != NULL &&
70 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
71 IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
72 "seq=%u last_frag=%u\n",
73 entry->seq, entry->last_frag);
74 dev_kfree_skb_any(entry->skb);
78 if (entry->skb != NULL && entry->seq == seq &&
79 (entry->last_frag + 1 == frag || frag == -1) &&
80 !compare_ether_addr(entry->src_addr, src) &&
81 !compare_ether_addr(entry->dst_addr, dst))
88 /* Called only as a tasklet (software IRQ) */
89 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
90 struct ieee80211_hdr_4addr *hdr)
92 struct sk_buff *skb = NULL;
94 unsigned int frag, seq;
95 struct ieee80211_frag_entry *entry;
97 sc = le16_to_cpu(hdr->seq_ctl);
98 frag = WLAN_GET_SEQ_FRAG(sc);
99 seq = WLAN_GET_SEQ_SEQ(sc);
102 /* Reserve enough space to fit maximum frame length */
103 skb = dev_alloc_skb(ieee->dev->mtu +
104 sizeof(struct ieee80211_hdr_4addr) +
107 8 /* WEP */ + ETH_ALEN /* WDS */ );
111 entry = &ieee->frag_cache[ieee->frag_next_idx];
112 ieee->frag_next_idx++;
113 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
114 ieee->frag_next_idx = 0;
116 if (entry->skb != NULL)
117 dev_kfree_skb_any(entry->skb);
119 entry->first_frag_time = jiffies;
121 entry->last_frag = frag;
123 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
124 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
126 /* received a fragment of a frame for which the head fragment
127 * should have already been received */
128 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
131 entry->last_frag = frag;
139 /* Called only as a tasklet (software IRQ) */
140 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
141 struct ieee80211_hdr_4addr *hdr)
145 struct ieee80211_frag_entry *entry;
147 sc = le16_to_cpu(hdr->seq_ctl);
148 seq = WLAN_GET_SEQ_SEQ(sc);
150 entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
154 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
155 "entry (seq=%u)\n", seq);
164 /* ieee80211_rx_frame_mgtmt
166 * Responsible for handling management control frames
168 * Called by ieee80211_rx */
170 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
171 struct ieee80211_rx_stats *rx_stats, u16 type,
174 if (ieee->iw_mode == IW_MODE_MASTER) {
175 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
179 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
183 if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
184 if (stype == WLAN_FC_STYPE_BEACON &&
185 ieee->iw_mode == IW_MODE_MASTER) {
186 struct sk_buff *skb2;
187 /* Process beacon frames also in kernel driver to
188 * update STA(AP) table statistics */
189 skb2 = skb_clone(skb, GFP_ATOMIC);
191 hostap_rx(skb2->dev, skb2, rx_stats);
194 /* send management frames to the user space daemon for
196 ieee->apdevstats.rx_packets++;
197 ieee->apdevstats.rx_bytes += skb->len;
198 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
202 if (ieee->iw_mode == IW_MODE_MASTER) {
203 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
204 printk(KERN_DEBUG "%s: unknown management frame "
205 "(type=0x%02x, stype=0x%02x) dropped\n",
206 skb->dev->name, type, stype);
210 hostap_rx(skb->dev, skb, rx_stats);
214 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
215 "received in non-Host AP mode\n", skb->dev->name);
220 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
221 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
222 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
224 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
225 static unsigned char bridge_tunnel_header[] =
226 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
227 /* No encapsulation header if EtherType < 0x600 (=length) */
229 /* Called by ieee80211_rx_frame_decrypt */
230 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
233 struct net_device *dev = ieee->dev;
235 struct ieee80211_hdr_3addr *hdr;
241 hdr = (struct ieee80211_hdr_3addr *)skb->data;
242 fc = le16_to_cpu(hdr->frame_ctl);
244 /* check that the frame is unicast frame to us */
245 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
246 IEEE80211_FCTL_TODS &&
247 !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
248 !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
249 /* ToDS frame with own addr BSSID and DA */
250 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
251 IEEE80211_FCTL_FROMDS &&
252 !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
253 /* FromDS frame with own addr as DA */
257 if (skb->len < 24 + 8)
260 /* check for port access entity Ethernet type */
261 pos = skb->data + 24;
262 ethertype = (pos[6] << 8) | pos[7];
263 if (ethertype == ETH_P_PAE)
269 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
271 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
272 struct lib80211_crypt_data *crypt)
274 struct ieee80211_hdr_3addr *hdr;
277 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
280 hdr = (struct ieee80211_hdr_3addr *)skb->data;
281 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
283 atomic_inc(&crypt->refcnt);
284 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
285 atomic_dec(&crypt->refcnt);
287 IEEE80211_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
290 IEEE80211_DEBUG_DROP("Decryption failed ICV "
291 "mismatch (key %d)\n",
292 skb->data[hdrlen + 3] >> 6);
293 ieee->ieee_stats.rx_discards_undecryptable++;
300 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
302 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
303 struct sk_buff *skb, int keyidx,
304 struct lib80211_crypt_data *crypt)
306 struct ieee80211_hdr_3addr *hdr;
309 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
312 hdr = (struct ieee80211_hdr_3addr *)skb->data;
313 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
315 atomic_inc(&crypt->refcnt);
316 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
317 atomic_dec(&crypt->refcnt);
319 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
320 " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
328 /* All received frames are sent to this function. @skb contains the frame in
329 * IEEE 802.11 format, i.e., in the format it was sent over air.
330 * This function is called only as a tasklet (software IRQ). */
331 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
332 struct ieee80211_rx_stats *rx_stats)
334 struct net_device *dev = ieee->dev;
335 struct ieee80211_hdr_4addr *hdr;
337 u16 fc, type, stype, sc;
338 struct net_device_stats *stats;
343 struct net_device *wds = NULL;
344 struct sk_buff *skb2 = NULL;
345 struct net_device *wds = NULL;
346 int frame_authorized = 0;
347 int from_assoc_ap = 0;
352 struct lib80211_crypt_data *crypt = NULL;
354 int can_be_decrypted = 0;
356 hdr = (struct ieee80211_hdr_4addr *)skb->data;
357 stats = &ieee->stats;
360 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
364 fc = le16_to_cpu(hdr->frame_ctl);
365 type = WLAN_FC_GET_TYPE(fc);
366 stype = WLAN_FC_GET_STYPE(fc);
367 sc = le16_to_cpu(hdr->seq_ctl);
368 frag = WLAN_GET_SEQ_FRAG(sc);
369 hdrlen = ieee80211_get_hdrlen(fc);
371 if (skb->len < hdrlen) {
372 printk(KERN_INFO "%s: invalid SKB length %d\n",
373 dev->name, skb->len);
377 /* Put this code here so that we avoid duplicating it in all
378 * Rx paths. - Jean II */
379 #ifdef CONFIG_WIRELESS_EXT
380 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
381 /* If spy monitoring on */
382 if (ieee->spy_data.spy_number > 0) {
383 struct iw_quality wstats;
386 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
387 wstats.level = rx_stats->signal;
388 wstats.updated |= IW_QUAL_LEVEL_UPDATED;
390 wstats.updated |= IW_QUAL_LEVEL_INVALID;
392 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
393 wstats.noise = rx_stats->noise;
394 wstats.updated |= IW_QUAL_NOISE_UPDATED;
396 wstats.updated |= IW_QUAL_NOISE_INVALID;
398 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
399 wstats.qual = rx_stats->signal;
400 wstats.updated |= IW_QUAL_QUAL_UPDATED;
402 wstats.updated |= IW_QUAL_QUAL_INVALID;
404 /* Update spy records */
405 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
407 #endif /* IW_WIRELESS_SPY */
408 #endif /* CONFIG_WIRELESS_EXT */
411 hostap_update_rx_stats(local->ap, hdr, rx_stats);
414 if (ieee->iw_mode == IW_MODE_MONITOR) {
416 stats->rx_bytes += skb->len;
417 ieee80211_monitor_rx(ieee, skb, rx_stats);
421 can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
422 is_broadcast_ether_addr(hdr->addr2)) ?
423 ieee->host_mc_decrypt : ieee->host_decrypt;
425 if (can_be_decrypted) {
426 if (skb->len >= hdrlen + 3) {
427 /* Top two-bits of byte 3 are the key index */
428 keyidx = skb->data[hdrlen + 3] >> 6;
431 /* ieee->crypt[] is WEP_KEY (4) in length. Given that keyidx
432 * is only allowed 2-bits of storage, no value of keyidx can
433 * be provided via above code that would result in keyidx
434 * being out of range */
435 crypt = ieee->crypt_info.crypt[keyidx];
440 /* Use station specific key to override default keys if the
441 * receiver address is a unicast address ("individual RA"). If
442 * bcrx_sta_key parameter is set, station specific key is used
443 * even with broad/multicast targets (this is against IEEE
444 * 802.11, but makes it easier to use different keys with
445 * stations that do not support WEP key mapping). */
447 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
448 (void)hostap_handle_sta_crypto(local, hdr, &crypt,
452 /* allow NULL decrypt to indicate an station specific override
453 * for default encryption */
454 if (crypt && (crypt->ops == NULL ||
455 crypt->ops->decrypt_mpdu == NULL))
458 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
459 /* This seems to be triggered by some (multicast?)
460 * frames from other than current BSS, so just drop the
461 * frames silently instead of filling system log with
463 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
464 " (SA=%pM)\n", hdr->addr2);
465 ieee->ieee_stats.rx_discards_undecryptable++;
470 if (type != WLAN_FC_TYPE_DATA) {
471 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
472 fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
473 (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
474 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
475 "from %pM\n", dev->name, hdr->addr2);
476 /* TODO: could inform hostapd about this so that it
477 * could send auth failure report */
481 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
487 /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
488 if (sc == ieee->prev_seq_ctl)
491 ieee->prev_seq_ctl = sc;
493 /* Data frame - extract src/dst addresses */
494 if (skb->len < IEEE80211_3ADDR_LEN)
497 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
498 case IEEE80211_FCTL_FROMDS:
499 memcpy(dst, hdr->addr1, ETH_ALEN);
500 memcpy(src, hdr->addr3, ETH_ALEN);
502 case IEEE80211_FCTL_TODS:
503 memcpy(dst, hdr->addr3, ETH_ALEN);
504 memcpy(src, hdr->addr2, ETH_ALEN);
506 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
507 if (skb->len < IEEE80211_4ADDR_LEN)
509 memcpy(dst, hdr->addr3, ETH_ALEN);
510 memcpy(src, hdr->addr4, ETH_ALEN);
513 memcpy(dst, hdr->addr1, ETH_ALEN);
514 memcpy(src, hdr->addr2, ETH_ALEN);
519 if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
522 skb->dev = dev = wds;
523 stats = hostap_get_stats(dev);
526 if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
527 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
528 IEEE80211_FCTL_FROMDS && ieee->stadev
529 && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
530 /* Frame from BSSID of the AP for which we are a client */
531 skb->dev = dev = ieee->stadev;
532 stats = hostap_get_stats(dev);
538 if ((ieee->iw_mode == IW_MODE_MASTER ||
539 ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
540 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
542 case AP_RX_CONTINUE_NOT_AUTHORIZED:
543 frame_authorized = 0;
546 frame_authorized = 1;
556 /* Nullfunc frames may have PS-bit set, so they must be passed to
557 * hostap_handle_sta_rx() before being dropped here. */
559 stype &= ~IEEE80211_STYPE_QOS_DATA;
561 if (stype != IEEE80211_STYPE_DATA &&
562 stype != IEEE80211_STYPE_DATA_CFACK &&
563 stype != IEEE80211_STYPE_DATA_CFPOLL &&
564 stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
565 if (stype != IEEE80211_STYPE_NULLFUNC)
566 IEEE80211_DEBUG_DROP("RX: dropped data frame "
567 "with no data (type=0x%02x, "
568 "subtype=0x%02x, len=%d)\n",
569 type, stype, skb->len);
573 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
575 if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
576 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
579 hdr = (struct ieee80211_hdr_4addr *)skb->data;
581 /* skb: hdr + (possibly fragmented) plaintext payload */
582 // PR: FIXME: hostap has additional conditions in the "if" below:
583 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
584 if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
586 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
587 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
590 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
591 "Rx cannot get skb from fragment "
592 "cache (morefrag=%d seq=%u frag=%u)\n",
593 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
594 WLAN_GET_SEQ_SEQ(sc), frag);
602 if (frag_skb->tail + flen > frag_skb->end) {
603 printk(KERN_WARNING "%s: host decrypted and "
604 "reassembled frame did not fit skb\n",
606 ieee80211_frag_cache_invalidate(ieee, hdr);
611 /* copy first fragment (including full headers) into
612 * beginning of the fragment cache skb */
613 skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
615 /* append frame payload to the end of the fragment
617 skb_copy_from_linear_data_offset(skb, hdrlen,
618 skb_put(frag_skb, flen), flen);
620 dev_kfree_skb_any(skb);
623 if (fc & IEEE80211_FCTL_MOREFRAGS) {
624 /* more fragments expected - leave the skb in fragment
625 * cache for now; it will be delivered to upper layers
626 * after all fragments have been received */
630 /* this was the last fragment and the frame will be
631 * delivered, so remove skb from fragment cache */
633 hdr = (struct ieee80211_hdr_4addr *)skb->data;
634 ieee80211_frag_cache_invalidate(ieee, hdr);
637 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
638 * encrypted/authenticated */
639 if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
640 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
643 hdr = (struct ieee80211_hdr_4addr *)skb->data;
644 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
645 if ( /*ieee->ieee802_1x && */
646 ieee80211_is_eapol_frame(ieee, skb)) {
647 /* pass unencrypted EAPOL frames even if encryption is
650 IEEE80211_DEBUG_DROP("encryption configured, but RX "
651 "frame not encrypted (SA=%pM)\n",
657 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
658 !ieee80211_is_eapol_frame(ieee, skb)) {
659 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
660 "frame from %pM (drop_unencrypted=1)\n",
665 /* If the frame was decrypted in hardware, we may need to strip off
666 * any security data (IV, ICV, etc) that was left behind */
667 if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
668 ieee->host_strip_iv_icv) {
671 /* Top two-bits of byte 3 are the key index */
672 if (skb->len >= hdrlen + 3)
673 keyidx = skb->data[hdrlen + 3] >> 6;
675 /* To strip off any security data which appears before the
676 * payload, we simply increase hdrlen (as the header gets
677 * chopped off immediately below). For the security data which
678 * appears after the payload, we use skb_trim. */
680 switch (ieee->sec.encode_alg[keyidx]) {
688 /* 4 byte IV, 4 byte ExtIV */
690 /* 8 byte MIC, 4 byte ICV */
694 /* 8 byte CCMP header */
701 if (skb->len < trimlen)
704 __skb_trim(skb, skb->len - trimlen);
706 if (skb->len < hdrlen)
710 /* skb: hdr + (possible reassembled) full plaintext payload */
712 payload = skb->data + hdrlen;
713 ethertype = (payload[6] << 8) | payload[7];
716 /* If IEEE 802.1X is used, check whether the port is authorized to send
717 * the received frame. */
718 if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
719 if (ethertype == ETH_P_PAE) {
720 printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
722 if (ieee->hostapd && ieee->apdev) {
723 /* Send IEEE 802.1X frames to the user
724 * space daemon for processing */
725 prism2_rx_80211(ieee->apdev, skb, rx_stats,
727 ieee->apdevstats.rx_packets++;
728 ieee->apdevstats.rx_bytes += skb->len;
731 } else if (!frame_authorized) {
732 printk(KERN_DEBUG "%s: dropped frame from "
733 "unauthorized port (IEEE 802.1X): "
734 "ethertype=0x%04x\n", dev->name, ethertype);
740 /* convert hdr + possible LLC headers into Ethernet header */
741 if (skb->len - hdrlen >= 8 &&
742 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
743 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
744 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
745 /* remove RFC1042 or Bridge-Tunnel encapsulation and
746 * replace EtherType */
747 skb_pull(skb, hdrlen + SNAP_SIZE);
748 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
749 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
752 /* Leave Ethernet header part of hdr and full payload */
753 skb_pull(skb, hdrlen);
754 len = htons(skb->len);
755 memcpy(skb_push(skb, 2), &len, 2);
756 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
757 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
761 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
762 IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
763 /* Non-standard frame: get addr4 from its bogus location after
765 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
766 skb->data + skb->len - ETH_ALEN,
768 skb_trim(skb, skb->len - ETH_ALEN);
773 stats->rx_bytes += skb->len;
776 if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
778 /* copy multicast frame both to the higher layers and
779 * to the wireless media */
780 ieee->ap->bridged_multicast++;
781 skb2 = skb_clone(skb, GFP_ATOMIC);
783 printk(KERN_DEBUG "%s: skb_clone failed for "
784 "multicast frame\n", dev->name);
785 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
786 /* send frame directly to the associated STA using
787 * wireless media and not passing to higher layers */
788 ieee->ap->bridged_unicast++;
795 /* send to wireless media */
797 skb2->protocol = htons(ETH_P_802_3);
798 skb_reset_mac_header(skb2);
799 skb_reset_network_header(skb2);
800 /* skb2->network_header += ETH_HLEN; */
801 dev_queue_xmit(skb2);
806 skb->protocol = eth_type_trans(skb, dev);
807 memset(skb->cb, 0, sizeof(skb->cb));
808 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
809 if (netif_rx(skb) == NET_RX_DROP) {
810 /* netif_rx always succeeds, but it might drop
811 * the packet. If it drops the packet, we log that
814 ("RX: netif_rx dropped the packet\n");
822 hostap_handle_sta_release(sta);
829 /* Returning 0 indicates to caller that we have not handled the SKB--
830 * so it is still allocated and can be used again by underlying
831 * hardware as a DMA target */
835 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
836 * This function takes over the skb, it should not be used again after calling
838 void ieee80211_rx_any(struct ieee80211_device *ieee,
839 struct sk_buff *skb, struct ieee80211_rx_stats *stats)
841 struct ieee80211_hdr_4addr *hdr;
842 int is_packet_for_us;
845 if (ieee->iw_mode == IW_MODE_MONITOR) {
846 if (!ieee80211_rx(ieee, skb, stats))
847 dev_kfree_skb_irq(skb);
851 if (skb->len < sizeof(struct ieee80211_hdr))
854 hdr = (struct ieee80211_hdr_4addr *)skb->data;
855 fc = le16_to_cpu(hdr->frame_ctl);
857 if ((fc & IEEE80211_FCTL_VERS) != 0)
860 switch (fc & IEEE80211_FCTL_FTYPE) {
861 case IEEE80211_FTYPE_MGMT:
862 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
864 ieee80211_rx_mgt(ieee, hdr, stats);
865 dev_kfree_skb_irq(skb);
867 case IEEE80211_FTYPE_DATA:
869 case IEEE80211_FTYPE_CTL:
875 is_packet_for_us = 0;
876 switch (ieee->iw_mode) {
878 /* our BSS and not from/to DS */
879 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
880 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
881 /* promisc: get all */
882 if (ieee->dev->flags & IFF_PROMISC)
883 is_packet_for_us = 1;
885 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
886 is_packet_for_us = 1;
888 else if (is_multicast_ether_addr(hdr->addr1))
889 is_packet_for_us = 1;
893 /* our BSS (== from our AP) and from DS */
894 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
895 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
896 /* promisc: get all */
897 if (ieee->dev->flags & IFF_PROMISC)
898 is_packet_for_us = 1;
900 else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
901 is_packet_for_us = 1;
903 else if (is_multicast_ether_addr(hdr->addr1)) {
904 /* not our own packet bcasted from AP */
905 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
906 is_packet_for_us = 1;
915 if (is_packet_for_us)
916 if (!ieee80211_rx(ieee, skb, stats))
917 dev_kfree_skb_irq(skb);
921 dev_kfree_skb_irq(skb);
922 ieee->stats.rx_dropped++;
926 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
928 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
931 * Make ther structure we read from the beacon packet has
934 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
935 *info_element, int sub_type)
938 if (info_element->qui_subtype != sub_type)
940 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
942 if (info_element->qui_type != QOS_OUI_TYPE)
944 if (info_element->version != QOS_VERSION_1)
951 * Parse a QoS parameter element
953 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
954 *element_param, struct ieee80211_info_element
958 u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
960 if ((info_element == NULL) || (element_param == NULL))
963 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
964 memcpy(element_param->info_element.qui, info_element->data,
966 element_param->info_element.elementID = info_element->id;
967 element_param->info_element.length = info_element->len;
971 ret = ieee80211_verify_qos_info(&element_param->info_element,
972 QOS_OUI_PARAM_SUB_TYPE);
977 * Parse a QoS information element
979 static int ieee80211_read_qos_info_element(struct
980 ieee80211_qos_information_element
981 *element_info, struct ieee80211_info_element
985 u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
987 if (element_info == NULL)
989 if (info_element == NULL)
992 if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
993 memcpy(element_info->qui, info_element->data,
995 element_info->elementID = info_element->id;
996 element_info->length = info_element->len;
1001 ret = ieee80211_verify_qos_info(element_info,
1002 QOS_OUI_INFO_SUB_TYPE);
1007 * Write QoS parameters from the ac parameters.
1009 static int ieee80211_qos_convert_ac_to_parameters(struct
1010 ieee80211_qos_parameter_info
1012 ieee80211_qos_parameters
1017 struct ieee80211_qos_ac_parameter *ac_params;
1022 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1023 ac_params = &(param_elm->ac_params_record[i]);
1025 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1026 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1028 cw_min = ac_params->ecw_min_max & 0x0F;
1029 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1031 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1032 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1034 qos_param->flag[i] =
1035 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1037 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1038 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1044 * we have a generic data element which it may contain QoS information or
1045 * parameters element. check the information element length to decide
1046 * which type to read
1048 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1050 struct ieee80211_network *network)
1053 struct ieee80211_qos_parameters *qos_param = NULL;
1054 struct ieee80211_qos_information_element qos_info_element;
1056 rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1059 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1060 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1062 struct ieee80211_qos_parameter_info param_element;
1064 rc = ieee80211_read_qos_param_element(¶m_element,
1067 qos_param = &(network->qos_data.parameters);
1068 ieee80211_qos_convert_ac_to_parameters(¶m_element,
1070 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1071 network->qos_data.param_count =
1072 param_element.info_element.ac_info & 0x0F;
1077 IEEE80211_DEBUG_QOS("QoS is supported\n");
1078 network->qos_data.supported = 1;
1083 #ifdef CONFIG_IEEE80211_DEBUG
1084 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1086 static const char *get_info_element_string(u16 id)
1091 MFIE_STRING(FH_SET);
1092 MFIE_STRING(DS_SET);
1093 MFIE_STRING(CF_SET);
1095 MFIE_STRING(IBSS_SET);
1096 MFIE_STRING(COUNTRY);
1097 MFIE_STRING(HOP_PARAMS);
1098 MFIE_STRING(HOP_TABLE);
1099 MFIE_STRING(REQUEST);
1100 MFIE_STRING(CHALLENGE);
1101 MFIE_STRING(POWER_CONSTRAINT);
1102 MFIE_STRING(POWER_CAPABILITY);
1103 MFIE_STRING(TPC_REQUEST);
1104 MFIE_STRING(TPC_REPORT);
1105 MFIE_STRING(SUPP_CHANNELS);
1107 MFIE_STRING(MEASURE_REQUEST);
1108 MFIE_STRING(MEASURE_REPORT);
1110 MFIE_STRING(IBSS_DFS);
1111 MFIE_STRING(ERP_INFO);
1113 MFIE_STRING(RATES_EX);
1114 MFIE_STRING(GENERIC);
1115 MFIE_STRING(QOS_PARAMETER);
1122 static int ieee80211_parse_info_param(struct ieee80211_info_element
1123 *info_element, u16 length,
1124 struct ieee80211_network *network)
1126 DECLARE_SSID_BUF(ssid);
1128 #ifdef CONFIG_IEEE80211_DEBUG
1133 while (length >= sizeof(*info_element)) {
1134 if (sizeof(*info_element) + info_element->len > length) {
1135 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1136 "info_element->len + 2 > left : "
1137 "info_element->len+2=%zd left=%d, id=%d.\n",
1139 sizeof(*info_element),
1140 length, info_element->id);
1141 /* We stop processing but don't return an error here
1142 * because some misbehaviour APs break this rule. ie.
1143 * Orinoco AP1000. */
1147 switch (info_element->id) {
1148 case MFIE_TYPE_SSID:
1149 network->ssid_len = min(info_element->len,
1150 (u8) IW_ESSID_MAX_SIZE);
1151 memcpy(network->ssid, info_element->data,
1153 if (network->ssid_len < IW_ESSID_MAX_SIZE)
1154 memset(network->ssid + network->ssid_len, 0,
1155 IW_ESSID_MAX_SIZE - network->ssid_len);
1157 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1158 print_ssid(ssid, network->ssid,
1163 case MFIE_TYPE_RATES:
1164 #ifdef CONFIG_IEEE80211_DEBUG
1167 network->rates_len = min(info_element->len,
1169 for (i = 0; i < network->rates_len; i++) {
1170 network->rates[i] = info_element->data[i];
1171 #ifdef CONFIG_IEEE80211_DEBUG
1172 p += snprintf(p, sizeof(rates_str) -
1173 (p - rates_str), "%02X ",
1176 if (ieee80211_is_ofdm_rate
1177 (info_element->data[i])) {
1178 network->flags |= NETWORK_HAS_OFDM;
1179 if (info_element->data[i] &
1180 IEEE80211_BASIC_RATE_MASK)
1186 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1187 rates_str, network->rates_len);
1190 case MFIE_TYPE_RATES_EX:
1191 #ifdef CONFIG_IEEE80211_DEBUG
1194 network->rates_ex_len = min(info_element->len,
1195 MAX_RATES_EX_LENGTH);
1196 for (i = 0; i < network->rates_ex_len; i++) {
1197 network->rates_ex[i] = info_element->data[i];
1198 #ifdef CONFIG_IEEE80211_DEBUG
1199 p += snprintf(p, sizeof(rates_str) -
1200 (p - rates_str), "%02X ",
1203 if (ieee80211_is_ofdm_rate
1204 (info_element->data[i])) {
1205 network->flags |= NETWORK_HAS_OFDM;
1206 if (info_element->data[i] &
1207 IEEE80211_BASIC_RATE_MASK)
1213 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1214 rates_str, network->rates_ex_len);
1217 case MFIE_TYPE_DS_SET:
1218 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1219 info_element->data[0]);
1220 network->channel = info_element->data[0];
1223 case MFIE_TYPE_FH_SET:
1224 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1227 case MFIE_TYPE_CF_SET:
1228 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1232 network->tim.tim_count = info_element->data[0];
1233 network->tim.tim_period = info_element->data[1];
1234 IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1237 case MFIE_TYPE_ERP_INFO:
1238 network->erp_value = info_element->data[0];
1239 network->flags |= NETWORK_HAS_ERP_VALUE;
1240 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1241 network->erp_value);
1244 case MFIE_TYPE_IBSS_SET:
1245 network->atim_window = info_element->data[0];
1246 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1247 network->atim_window);
1250 case MFIE_TYPE_CHALLENGE:
1251 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1254 case MFIE_TYPE_GENERIC:
1255 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1257 if (!ieee80211_parse_qos_info_param_IE(info_element,
1261 if (info_element->len >= 4 &&
1262 info_element->data[0] == 0x00 &&
1263 info_element->data[1] == 0x50 &&
1264 info_element->data[2] == 0xf2 &&
1265 info_element->data[3] == 0x01) {
1266 network->wpa_ie_len = min(info_element->len + 2,
1268 memcpy(network->wpa_ie, info_element,
1269 network->wpa_ie_len);
1274 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1276 network->rsn_ie_len = min(info_element->len + 2,
1278 memcpy(network->rsn_ie, info_element,
1279 network->rsn_ie_len);
1282 case MFIE_TYPE_QOS_PARAMETER:
1284 "QoS Error need to parse QOS_PARAMETER IE\n");
1287 case MFIE_TYPE_POWER_CONSTRAINT:
1288 network->power_constraint = info_element->data[0];
1289 network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1293 network->power_constraint = info_element->data[0];
1294 network->flags |= NETWORK_HAS_CSA;
1297 case MFIE_TYPE_QUIET:
1298 network->quiet.count = info_element->data[0];
1299 network->quiet.period = info_element->data[1];
1300 network->quiet.duration = info_element->data[2];
1301 network->quiet.offset = info_element->data[3];
1302 network->flags |= NETWORK_HAS_QUIET;
1305 case MFIE_TYPE_IBSS_DFS:
1306 if (network->ibss_dfs)
1308 network->ibss_dfs = kmemdup(info_element->data,
1311 if (!network->ibss_dfs)
1313 network->flags |= NETWORK_HAS_IBSS_DFS;
1316 case MFIE_TYPE_TPC_REPORT:
1317 network->tpc_report.transmit_power =
1318 info_element->data[0];
1319 network->tpc_report.link_margin = info_element->data[1];
1320 network->flags |= NETWORK_HAS_TPC_REPORT;
1324 IEEE80211_DEBUG_MGMT
1325 ("Unsupported info element: %s (%d)\n",
1326 get_info_element_string(info_element->id),
1331 length -= sizeof(*info_element) + info_element->len;
1333 (struct ieee80211_info_element *)&info_element->
1334 data[info_element->len];
1340 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1341 *frame, struct ieee80211_rx_stats *stats)
1343 struct ieee80211_network network_resp = {
1346 struct ieee80211_network *network = &network_resp;
1347 struct net_device *dev = ieee->dev;
1350 network->qos_data.active = 0;
1351 network->qos_data.supported = 0;
1352 network->qos_data.param_count = 0;
1353 network->qos_data.old_param_count = 0;
1355 //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1356 network->atim_window = le16_to_cpu(frame->aid);
1357 network->listen_interval = le16_to_cpu(frame->status);
1358 memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1359 network->capability = le16_to_cpu(frame->capability);
1360 network->last_scanned = jiffies;
1361 network->rates_len = network->rates_ex_len = 0;
1362 network->last_associate = 0;
1363 network->ssid_len = 0;
1364 network->erp_value =
1365 (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1367 if (stats->freq == IEEE80211_52GHZ_BAND) {
1368 /* for A band (No DS info) */
1369 network->channel = stats->received_channel;
1371 network->flags |= NETWORK_HAS_CCK;
1373 network->wpa_ie_len = 0;
1374 network->rsn_ie_len = 0;
1376 if (ieee80211_parse_info_param
1377 (frame->info_element, stats->len - sizeof(*frame), network))
1381 if (stats->freq == IEEE80211_52GHZ_BAND)
1382 network->mode = IEEE_A;
1384 if (network->flags & NETWORK_HAS_OFDM)
1385 network->mode |= IEEE_G;
1386 if (network->flags & NETWORK_HAS_CCK)
1387 network->mode |= IEEE_B;
1390 memcpy(&network->stats, stats, sizeof(network->stats));
1392 if (ieee->handle_assoc_response != NULL)
1393 ieee->handle_assoc_response(dev, frame, network);
1398 /***************************************************/
1400 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1402 struct ieee80211_network *network,
1403 struct ieee80211_rx_stats *stats)
1405 DECLARE_SSID_BUF(ssid);
1407 network->qos_data.active = 0;
1408 network->qos_data.supported = 0;
1409 network->qos_data.param_count = 0;
1410 network->qos_data.old_param_count = 0;
1412 /* Pull out fixed field data */
1413 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1414 network->capability = le16_to_cpu(beacon->capability);
1415 network->last_scanned = jiffies;
1416 network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1417 network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1418 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1419 /* Where to pull this? beacon->listen_interval; */
1420 network->listen_interval = 0x0A;
1421 network->rates_len = network->rates_ex_len = 0;
1422 network->last_associate = 0;
1423 network->ssid_len = 0;
1425 network->atim_window = 0;
1426 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1429 if (stats->freq == IEEE80211_52GHZ_BAND) {
1430 /* for A band (No DS info) */
1431 network->channel = stats->received_channel;
1433 network->flags |= NETWORK_HAS_CCK;
1435 network->wpa_ie_len = 0;
1436 network->rsn_ie_len = 0;
1438 if (ieee80211_parse_info_param
1439 (beacon->info_element, stats->len - sizeof(*beacon), network))
1443 if (stats->freq == IEEE80211_52GHZ_BAND)
1444 network->mode = IEEE_A;
1446 if (network->flags & NETWORK_HAS_OFDM)
1447 network->mode |= IEEE_G;
1448 if (network->flags & NETWORK_HAS_CCK)
1449 network->mode |= IEEE_B;
1452 if (network->mode == 0) {
1453 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
1455 print_ssid(ssid, network->ssid,
1461 memcpy(&network->stats, stats, sizeof(network->stats));
1466 static inline int is_same_network(struct ieee80211_network *src,
1467 struct ieee80211_network *dst)
1469 /* A network is only a duplicate if the channel, BSSID, and ESSID
1470 * all match. We treat all <hidden> with the same BSSID and channel
1472 return ((src->ssid_len == dst->ssid_len) &&
1473 (src->channel == dst->channel) &&
1474 !compare_ether_addr(src->bssid, dst->bssid) &&
1475 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1478 static void update_network(struct ieee80211_network *dst,
1479 struct ieee80211_network *src)
1484 ieee80211_network_reset(dst);
1485 dst->ibss_dfs = src->ibss_dfs;
1487 /* We only update the statistics if they were created by receiving
1488 * the network information on the actual channel the network is on.
1490 * This keeps beacons received on neighbor channels from bringing
1491 * down the signal level of an AP. */
1492 if (dst->channel == src->stats.received_channel)
1493 memcpy(&dst->stats, &src->stats,
1494 sizeof(struct ieee80211_rx_stats));
1496 IEEE80211_DEBUG_SCAN("Network %pM info received "
1497 "off channel (%d vs. %d)\n", src->bssid,
1498 dst->channel, src->stats.received_channel);
1500 dst->capability = src->capability;
1501 memcpy(dst->rates, src->rates, src->rates_len);
1502 dst->rates_len = src->rates_len;
1503 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1504 dst->rates_ex_len = src->rates_ex_len;
1506 dst->mode = src->mode;
1507 dst->flags = src->flags;
1508 dst->time_stamp[0] = src->time_stamp[0];
1509 dst->time_stamp[1] = src->time_stamp[1];
1511 dst->beacon_interval = src->beacon_interval;
1512 dst->listen_interval = src->listen_interval;
1513 dst->atim_window = src->atim_window;
1514 dst->erp_value = src->erp_value;
1515 dst->tim = src->tim;
1517 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1518 dst->wpa_ie_len = src->wpa_ie_len;
1519 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1520 dst->rsn_ie_len = src->rsn_ie_len;
1522 dst->last_scanned = jiffies;
1523 qos_active = src->qos_data.active;
1524 old_param = dst->qos_data.old_param_count;
1525 if (dst->flags & NETWORK_HAS_QOS_MASK)
1526 memcpy(&dst->qos_data, &src->qos_data,
1527 sizeof(struct ieee80211_qos_data));
1529 dst->qos_data.supported = src->qos_data.supported;
1530 dst->qos_data.param_count = src->qos_data.param_count;
1533 if (dst->qos_data.supported == 1) {
1536 ("QoS the network %s is QoS supported\n",
1540 ("QoS the network is QoS supported\n");
1542 dst->qos_data.active = qos_active;
1543 dst->qos_data.old_param_count = old_param;
1545 /* dst->last_associate is not overwritten */
1548 static inline int is_beacon(__le16 fc)
1550 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1553 static void ieee80211_process_probe_response(struct ieee80211_device
1555 ieee80211_probe_response
1556 *beacon, struct ieee80211_rx_stats
1559 struct net_device *dev = ieee->dev;
1560 struct ieee80211_network network = {
1563 struct ieee80211_network *target;
1564 struct ieee80211_network *oldest = NULL;
1565 #ifdef CONFIG_IEEE80211_DEBUG
1566 struct ieee80211_info_element *info_element = beacon->info_element;
1568 unsigned long flags;
1569 DECLARE_SSID_BUF(ssid);
1571 IEEE80211_DEBUG_SCAN("'%s' (%pM"
1572 "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1573 print_ssid(ssid, info_element->data, info_element->len),
1574 beacon->header.addr3,
1575 (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1576 (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1577 (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1578 (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1579 (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1580 (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1581 (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1582 (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1583 (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1584 (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1585 (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1586 (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1587 (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1588 (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1589 (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1590 (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1592 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1593 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1594 print_ssid(ssid, info_element->data,
1596 beacon->header.addr3,
1597 is_beacon(beacon->header.frame_ctl) ?
1598 "BEACON" : "PROBE RESPONSE");
1602 /* The network parsed correctly -- so now we scan our known networks
1603 * to see if we can find it in our list.
1605 * NOTE: This search is definitely not optimized. Once its doing
1606 * the "right thing" we'll optimize it for efficiency if
1609 /* Search for this entry in the list and update it if it is
1612 spin_lock_irqsave(&ieee->lock, flags);
1614 list_for_each_entry(target, &ieee->network_list, list) {
1615 if (is_same_network(target, &network))
1618 if ((oldest == NULL) ||
1619 time_before(target->last_scanned, oldest->last_scanned))
1623 /* If we didn't find a match, then get a new network slot to initialize
1624 * with this beacon's information */
1625 if (&target->list == &ieee->network_list) {
1626 if (list_empty(&ieee->network_free_list)) {
1627 /* If there are no more slots, expire the oldest */
1628 list_del(&oldest->list);
1630 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
1632 print_ssid(ssid, target->ssid,
1635 ieee80211_network_reset(target);
1637 /* Otherwise just pull from the free list */
1638 target = list_entry(ieee->network_free_list.next,
1639 struct ieee80211_network, list);
1640 list_del(ieee->network_free_list.next);
1643 #ifdef CONFIG_IEEE80211_DEBUG
1644 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1645 print_ssid(ssid, network.ssid,
1648 is_beacon(beacon->header.frame_ctl) ?
1649 "BEACON" : "PROBE RESPONSE");
1651 memcpy(target, &network, sizeof(*target));
1652 network.ibss_dfs = NULL;
1653 list_add_tail(&target->list, &ieee->network_list);
1655 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1656 print_ssid(ssid, target->ssid,
1659 is_beacon(beacon->header.frame_ctl) ?
1660 "BEACON" : "PROBE RESPONSE");
1661 update_network(target, &network);
1662 network.ibss_dfs = NULL;
1665 spin_unlock_irqrestore(&ieee->lock, flags);
1667 if (is_beacon(beacon->header.frame_ctl)) {
1668 if (ieee->handle_beacon != NULL)
1669 ieee->handle_beacon(dev, beacon, target);
1671 if (ieee->handle_probe_response != NULL)
1672 ieee->handle_probe_response(dev, beacon, target);
1676 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1677 struct ieee80211_hdr_4addr *header,
1678 struct ieee80211_rx_stats *stats)
1680 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1681 case IEEE80211_STYPE_ASSOC_RESP:
1682 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1683 WLAN_FC_GET_STYPE(le16_to_cpu
1684 (header->frame_ctl)));
1685 ieee80211_handle_assoc_resp(ieee,
1686 (struct ieee80211_assoc_response *)
1690 case IEEE80211_STYPE_REASSOC_RESP:
1691 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1692 WLAN_FC_GET_STYPE(le16_to_cpu
1693 (header->frame_ctl)));
1696 case IEEE80211_STYPE_PROBE_REQ:
1697 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1698 WLAN_FC_GET_STYPE(le16_to_cpu
1699 (header->frame_ctl)));
1701 if (ieee->handle_probe_request != NULL)
1702 ieee->handle_probe_request(ieee->dev,
1704 ieee80211_probe_request *)
1708 case IEEE80211_STYPE_PROBE_RESP:
1709 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1710 WLAN_FC_GET_STYPE(le16_to_cpu
1711 (header->frame_ctl)));
1712 IEEE80211_DEBUG_SCAN("Probe response\n");
1713 ieee80211_process_probe_response(ieee,
1715 ieee80211_probe_response *)
1719 case IEEE80211_STYPE_BEACON:
1720 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1721 WLAN_FC_GET_STYPE(le16_to_cpu
1722 (header->frame_ctl)));
1723 IEEE80211_DEBUG_SCAN("Beacon\n");
1724 ieee80211_process_probe_response(ieee,
1726 ieee80211_probe_response *)
1729 case IEEE80211_STYPE_AUTH:
1731 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1732 WLAN_FC_GET_STYPE(le16_to_cpu
1733 (header->frame_ctl)));
1735 if (ieee->handle_auth != NULL)
1736 ieee->handle_auth(ieee->dev,
1737 (struct ieee80211_auth *)header);
1740 case IEEE80211_STYPE_DISASSOC:
1741 if (ieee->handle_disassoc != NULL)
1742 ieee->handle_disassoc(ieee->dev,
1743 (struct ieee80211_disassoc *)
1747 case IEEE80211_STYPE_ACTION:
1748 IEEE80211_DEBUG_MGMT("ACTION\n");
1749 if (ieee->handle_action)
1750 ieee->handle_action(ieee->dev,
1751 (struct ieee80211_action *)
1755 case IEEE80211_STYPE_REASSOC_REQ:
1756 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1757 WLAN_FC_GET_STYPE(le16_to_cpu
1758 (header->frame_ctl)));
1760 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1762 if (ieee->handle_reassoc_request != NULL)
1763 ieee->handle_reassoc_request(ieee->dev,
1764 (struct ieee80211_reassoc_request *)
1768 case IEEE80211_STYPE_ASSOC_REQ:
1769 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1770 WLAN_FC_GET_STYPE(le16_to_cpu
1771 (header->frame_ctl)));
1773 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1775 if (ieee->handle_assoc_request != NULL)
1776 ieee->handle_assoc_request(ieee->dev);
1779 case IEEE80211_STYPE_DEAUTH:
1780 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1781 if (ieee->handle_deauth != NULL)
1782 ieee->handle_deauth(ieee->dev,
1783 (struct ieee80211_deauth *)
1787 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1788 WLAN_FC_GET_STYPE(le16_to_cpu
1789 (header->frame_ctl)));
1790 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1792 WLAN_FC_GET_STYPE(le16_to_cpu
1793 (header->frame_ctl)));
1798 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1799 EXPORT_SYMBOL(ieee80211_rx_mgt);
1800 EXPORT_SYMBOL(ieee80211_rx);