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, 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
14 ******************************************************************************
16 Few modifications for Realtek's Wi-Fi drivers by
17 Andrea Merello <andreamrl@tiscali.it>
19 A special thanks goes to Realtek for their support !
21 ******************************************************************************/
24 #include <linux/compiler.h>
25 //#include <linux/config.h>
26 #include <linux/errno.h>
27 #include <linux/if_arp.h>
28 #include <linux/in6.h>
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/netdevice.h>
34 #include <linux/pci.h>
35 #include <linux/proc_fs.h>
36 #include <linux/skbuff.h>
37 #include <linux/slab.h>
38 #include <linux/tcp.h>
39 #include <linux/types.h>
40 #include <linux/wireless.h>
41 #include <linux/etherdevice.h>
42 #include <linux/uaccess.h>
43 #include <linux/ctype.h>
45 #include "ieee80211.h"
47 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
49 struct ieee80211_rx_stats *rx_stats)
51 struct ieee80211_hdr_4addr *hdr =
52 (struct ieee80211_hdr_4addr *)skb->data;
53 u16 fc = le16_to_cpu(hdr->frame_ctl);
56 skb_reset_mac_header(skb);
57 skb_pull(skb, ieee80211_get_hdrlen(fc));
58 skb->pkt_type = PACKET_OTHERHOST;
59 skb->protocol = __constant_htons(ETH_P_80211_RAW);
60 memset(skb->cb, 0, sizeof(skb->cb));
65 /* Called only as a tasklet (software IRQ) */
66 static struct ieee80211_frag_entry *
67 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
68 unsigned int frag, u8 tid, u8 *src, u8 *dst)
70 struct ieee80211_frag_entry *entry;
73 for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
74 entry = &ieee->frag_cache[tid][i];
75 if (entry->skb != NULL &&
76 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
78 "expiring fragment cache entry "
79 "seq=%u last_frag=%u\n",
80 entry->seq, entry->last_frag);
81 dev_kfree_skb_any(entry->skb);
85 if (entry->skb != NULL && entry->seq == seq &&
86 (entry->last_frag + 1 == frag || frag == -1) &&
87 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
88 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
95 /* Called only as a tasklet (software IRQ) */
96 static struct sk_buff *
97 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
98 struct ieee80211_hdr_4addr *hdr)
100 struct sk_buff *skb = NULL;
101 u16 fc = le16_to_cpu(hdr->frame_ctl);
102 u16 sc = le16_to_cpu(hdr->seq_ctl);
103 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
104 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
105 struct ieee80211_frag_entry *entry;
106 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
107 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
110 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
111 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
112 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
115 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
116 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
117 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
125 /* Reserve enough space to fit maximum frame length */
126 skb = dev_alloc_skb(ieee->dev->mtu +
127 sizeof(struct ieee80211_hdr_4addr) +
132 (IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
136 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
137 ieee->frag_next_idx[tid]++;
138 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
139 ieee->frag_next_idx[tid] = 0;
141 if (entry->skb != NULL)
142 dev_kfree_skb_any(entry->skb);
144 entry->first_frag_time = jiffies;
146 entry->last_frag = frag;
148 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
149 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
151 /* received a fragment of a frame for which the head fragment
152 * should have already been received */
153 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
156 entry->last_frag = frag;
165 /* Called only as a tasklet (software IRQ) */
166 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
167 struct ieee80211_hdr_4addr *hdr)
169 u16 fc = le16_to_cpu(hdr->frame_ctl);
170 u16 sc = le16_to_cpu(hdr->seq_ctl);
171 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
172 struct ieee80211_frag_entry *entry;
173 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
174 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
177 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
178 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
179 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
182 } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
183 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
184 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
191 entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
195 IEEE80211_DEBUG_FRAG(
196 "could not invalidate fragment cache "
197 "entry (seq=%u)\n", seq);
207 /* ieee80211_rx_frame_mgtmt
209 * Responsible for handling management control frames
211 * Called by ieee80211_rx */
213 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
214 struct ieee80211_rx_stats *rx_stats, u16 type,
217 struct ieee80211_hdr_4addr *hdr;
219 // cheat the the hdr type
220 hdr = (struct ieee80211_hdr_4addr *)skb->data;
222 /* On the struct stats definition there is written that
223 * this is not mandatory.... but seems that the probe
224 * response parser uses it
226 rx_stats->len = skb->len;
227 ieee80211_rx_mgt(ieee, (struct ieee80211_hdr_4addr *)skb->data,
230 if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) {
231 dev_kfree_skb_any(skb);
235 ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
237 dev_kfree_skb_any(skb);
245 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
246 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
247 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
248 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
249 static unsigned char bridge_tunnel_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
250 /* No encapsulation header if EtherType < 0x600 (=length) */
252 /* Called by ieee80211_rx_frame_decrypt */
253 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
254 struct sk_buff *skb, size_t hdrlen)
256 struct net_device *dev = ieee->dev;
258 struct ieee80211_hdr_4addr *hdr;
264 hdr = (struct ieee80211_hdr_4addr *)skb->data;
265 fc = le16_to_cpu(hdr->frame_ctl);
267 /* check that the frame is unicast frame to us */
268 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
269 IEEE80211_FCTL_TODS &&
270 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
271 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
272 /* ToDS frame with own addr BSSID and DA */
273 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
274 IEEE80211_FCTL_FROMDS &&
275 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
276 /* FromDS frame with own addr as DA */
280 if (skb->len < 24 + 8)
283 /* check for port access entity Ethernet type */
284 // pos = skb->data + 24;
285 pos = skb->data + hdrlen;
286 ethertype = (pos[6] << 8) | pos[7];
287 if (ethertype == ETH_P_PAE)
293 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
295 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
296 struct ieee80211_crypt_data *crypt)
298 struct ieee80211_hdr_4addr *hdr;
301 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
304 hdr = (struct ieee80211_hdr_4addr *)skb->data;
305 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
307 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
308 if (ieee->tkip_countermeasures &&
309 strcmp(crypt->ops->name, "TKIP") == 0) {
310 if (net_ratelimit()) {
311 netdev_dbg(ieee->dev,
312 "TKIP countermeasures: dropped received packet from %pM\n",
313 ieee->dev->name, hdr->addr2);
319 atomic_inc(&crypt->refcnt);
320 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
321 atomic_dec(&crypt->refcnt);
323 IEEE80211_DEBUG_DROP(
324 "decryption failed (SA=%pM"
325 ") res=%d\n", hdr->addr2, res);
327 IEEE80211_DEBUG_DROP("Decryption failed ICV "
328 "mismatch (key %d)\n",
329 skb->data[hdrlen + 3] >> 6);
330 ieee->ieee_stats.rx_discards_undecryptable++;
338 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
340 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
341 int keyidx, struct ieee80211_crypt_data *crypt)
343 struct ieee80211_hdr_4addr *hdr;
346 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
349 hdr = (struct ieee80211_hdr_4addr *)skb->data;
350 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
352 atomic_inc(&crypt->refcnt);
353 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
354 atomic_dec(&crypt->refcnt);
356 netdev_dbg(ieee->dev,
357 "MSDU decryption/MIC verification failed (SA=%pM keyidx=%d)\n",
366 /* this function is stolen from ipw2200 driver*/
367 #define IEEE_PACKET_RETRY_TIME (5*HZ)
368 static int is_duplicate_packet(struct ieee80211_device *ieee,
369 struct ieee80211_hdr_4addr *header)
371 u16 fc = le16_to_cpu(header->frame_ctl);
372 u16 sc = le16_to_cpu(header->seq_ctl);
373 u16 seq = WLAN_GET_SEQ_SEQ(sc);
374 u16 frag = WLAN_GET_SEQ_FRAG(sc);
375 u16 *last_seq, *last_frag;
376 unsigned long *last_time;
377 struct ieee80211_hdr_3addrqos *hdr_3addrqos;
378 struct ieee80211_hdr_4addrqos *hdr_4addrqos;
382 if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
383 hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
384 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
387 } else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
388 hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
389 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
395 switch (ieee->iw_mode) {
399 struct ieee_ibss_seq *entry = NULL;
400 u8 *mac = header->addr2;
401 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
403 list_for_each(p, &ieee->ibss_mac_hash[index]) {
404 entry = list_entry(p, struct ieee_ibss_seq, list);
405 if (!memcmp(entry->mac, mac, ETH_ALEN))
408 // if (memcmp(entry->mac, mac, ETH_ALEN)){
409 if (p == &ieee->ibss_mac_hash[index]) {
410 entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
414 memcpy(entry->mac, mac, ETH_ALEN);
415 entry->seq_num[tid] = seq;
416 entry->frag_num[tid] = frag;
417 entry->packet_time[tid] = jiffies;
418 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
421 last_seq = &entry->seq_num[tid];
422 last_frag = &entry->frag_num[tid];
423 last_time = &entry->packet_time[tid];
428 last_seq = &ieee->last_rxseq_num[tid];
429 last_frag = &ieee->last_rxfrag_num[tid];
430 last_time = &ieee->last_packet_time[tid];
438 // printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
440 if ((*last_seq == seq) &&
441 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
442 if (*last_frag == frag) {
443 //printk(KERN_WARNING "[1] go drop!\n");
447 if (*last_frag + 1 != frag)
448 /* out-of-order fragment */
449 //printk(KERN_WARNING "[2] go drop!\n");
455 *last_time = jiffies;
459 // BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
466 /* All received frames are sent to this function. @skb contains the frame in
467 * IEEE 802.11 format, i.e., in the format it was sent over air.
468 * This function is called only as a tasklet (software IRQ). */
469 int ieee80211_rtl_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
470 struct ieee80211_rx_stats *rx_stats)
472 struct net_device *dev = ieee->dev;
473 //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
474 struct ieee80211_hdr_4addr *hdr;
477 u16 fc, type, stype, sc;
478 struct net_device_stats *stats;
485 struct ieee80211_crypt_data *crypt = NULL;
488 // cheat the the hdr type
489 hdr = (struct ieee80211_hdr_4addr *)skb->data;
490 stats = &ieee->stats;
493 netdev_info(ieee->dev, "SKB length < 10\n");
497 fc = le16_to_cpu(hdr->frame_ctl);
498 type = WLAN_FC_GET_TYPE(fc);
499 stype = WLAN_FC_GET_STYPE(fc);
500 sc = le16_to_cpu(hdr->seq_ctl);
502 frag = WLAN_GET_SEQ_FRAG(sc);
504 //YJ,add,080828,for keep alive
505 if ((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS) {
506 if (!memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN))
507 ieee->NumRxUnicast++;
509 if (!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
510 ieee->NumRxUnicast++;
512 //YJ,add,080828,for keep alive,end
514 hdrlen = ieee80211_get_hdrlen(fc);
517 if (ieee->iw_mode == IW_MODE_MONITOR) {
518 ieee80211_monitor_rx(ieee, skb, rx_stats);
520 stats->rx_bytes += skb->len;
524 if (ieee->host_decrypt) {
526 if (skb->len >= hdrlen + 3)
527 idx = skb->data[hdrlen + 3] >> 6;
528 crypt = ieee->crypt[idx];
530 /* allow NULL decrypt to indicate an station specific override
531 * for default encryption */
532 if (crypt && (crypt->ops == NULL ||
533 crypt->ops->decrypt_mpdu == NULL))
536 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
537 /* This seems to be triggered by some (multicast?)
538 * frames from other than current BSS, so just drop the
539 * frames silently instead of filling system log with
541 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
544 ieee->ieee_stats.rx_discards_undecryptable++;
549 if (skb->len < IEEE80211_DATA_HDR3_LEN)
552 // if QoS enabled, should check the sequence for each of the AC
553 if (is_duplicate_packet(ieee, hdr))
557 if (type == IEEE80211_FTYPE_MGMT) {
558 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
564 /* Data frame - extract src/dst addresses */
565 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
566 case IEEE80211_FCTL_FROMDS:
567 memcpy(dst, hdr->addr1, ETH_ALEN);
568 memcpy(src, hdr->addr3, ETH_ALEN);
569 memcpy(bssid, hdr->addr2, ETH_ALEN);
571 case IEEE80211_FCTL_TODS:
572 memcpy(dst, hdr->addr3, ETH_ALEN);
573 memcpy(src, hdr->addr2, ETH_ALEN);
574 memcpy(bssid, hdr->addr1, ETH_ALEN);
576 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
577 if (skb->len < IEEE80211_DATA_HDR4_LEN)
579 memcpy(dst, hdr->addr3, ETH_ALEN);
580 memcpy(src, hdr->addr4, ETH_ALEN);
581 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
584 memcpy(dst, hdr->addr1, ETH_ALEN);
585 memcpy(src, hdr->addr2, ETH_ALEN);
586 memcpy(bssid, hdr->addr3, ETH_ALEN);
591 dev->last_rx = jiffies;
594 /* Nullfunc frames may have PS-bit set, so they must be passed to
595 * hostap_handle_sta_rx() before being dropped here. */
596 if (stype != IEEE80211_STYPE_DATA &&
597 stype != IEEE80211_STYPE_DATA_CFACK &&
598 stype != IEEE80211_STYPE_DATA_CFPOLL &&
599 stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
600 stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
602 if (stype != IEEE80211_STYPE_NULLFUNC)
603 IEEE80211_DEBUG_DROP(
604 "RX: dropped data frame "
605 "with no data (type=0x%02x, "
606 "subtype=0x%02x, len=%d)\n",
607 type, stype, skb->len);
610 if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
613 ieee->NumRxDataInPeriod++;
614 ieee->NumRxOkTotal++;
615 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
617 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
618 (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
621 hdr = (struct ieee80211_hdr_4addr *)skb->data;
623 /* skb: hdr + (possibly fragmented) plaintext payload */
624 // PR: FIXME: hostap has additional conditions in the "if" below:
625 // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
626 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
628 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
629 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
632 IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
633 "Rx cannot get skb from fragment "
634 "cache (morefrag=%d seq=%u frag=%u)\n",
635 (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
636 WLAN_GET_SEQ_SEQ(sc), frag);
643 if (frag_skb->tail + flen > frag_skb->end) {
644 netdev_warn(ieee->dev,
645 "host decrypted and reassembled frame did not fit skb\n");
646 ieee80211_frag_cache_invalidate(ieee, hdr);
651 /* copy first fragment (including full headers) into
652 * beginning of the fragment cache skb */
653 memcpy(skb_put(frag_skb, flen), skb->data, flen);
655 /* append frame payload to the end of the fragment
657 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
660 dev_kfree_skb_any(skb);
663 if (fc & IEEE80211_FCTL_MOREFRAGS) {
664 /* more fragments expected - leave the skb in fragment
665 * cache for now; it will be delivered to upper layers
666 * after all fragments have been received */
670 /* this was the last fragment and the frame will be
671 * delivered, so remove skb from fragment cache */
673 hdr = (struct ieee80211_hdr_4addr *)skb->data;
674 ieee80211_frag_cache_invalidate(ieee, hdr);
677 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
678 * encrypted/authenticated */
679 if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
680 ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
683 hdr = (struct ieee80211_hdr_4addr *)skb->data;
684 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
685 if (/*ieee->ieee802_1x &&*/
686 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
688 #ifdef CONFIG_IEEE80211_DEBUG
689 /* pass unencrypted EAPOL frames even if encryption is
691 struct eapol *eap = (struct eapol *)(skb->data +
693 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
694 eap_get_type(eap->type));
697 IEEE80211_DEBUG_DROP(
698 "encryption configured, but RX "
699 "frame not encrypted (SA=%pM)\n",
705 #ifdef CONFIG_IEEE80211_DEBUG
706 if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
707 ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
708 struct eapol *eap = (struct eapol *)(skb->data +
710 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
711 eap_get_type(eap->type));
715 if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
716 !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
717 IEEE80211_DEBUG_DROP(
718 "dropped unencrypted RX data "
720 " (drop_unencrypted=1)\n",
725 if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
726 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
729 /* skb: hdr + (possible reassembled) full plaintext payload */
730 payload = skb->data + hdrlen;
731 ethertype = (payload[6] << 8) | payload[7];
734 /* convert hdr + possible LLC headers into Ethernet header */
735 if (skb->len - hdrlen >= 8 &&
736 ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
737 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
738 memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
739 /* remove RFC1042 or Bridge-Tunnel encapsulation and
740 * replace EtherType */
741 skb_pull(skb, hdrlen + SNAP_SIZE);
742 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
743 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
746 /* Leave Ethernet header part of hdr and full payload */
747 skb_pull(skb, hdrlen);
748 len = htons(skb->len);
749 memcpy(skb_push(skb, 2), &len, 2);
750 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
751 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
756 stats->rx_bytes += skb->len;
759 skb->protocol = eth_type_trans(skb, dev);
760 memset(skb->cb, 0, sizeof(skb->cb));
762 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
763 ieee->last_rx_ps_time = jiffies;
773 /* Returning 0 indicates to caller that we have not handled the SKB--
774 * so it is still allocated and can be used again by underlying
775 * hardware as a DMA target */
779 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
781 static inline int ieee80211_is_ofdm_rate(u8 rate)
783 switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
784 case IEEE80211_OFDM_RATE_6MB:
785 case IEEE80211_OFDM_RATE_9MB:
786 case IEEE80211_OFDM_RATE_12MB:
787 case IEEE80211_OFDM_RATE_18MB:
788 case IEEE80211_OFDM_RATE_24MB:
789 case IEEE80211_OFDM_RATE_36MB:
790 case IEEE80211_OFDM_RATE_48MB:
791 case IEEE80211_OFDM_RATE_54MB:
797 static inline int ieee80211_SignalStrengthTranslate(
803 // Step 1. Scale mapping.
804 if (CurrSS >= 71 && CurrSS <= 100)
805 RetSS = 90 + ((CurrSS - 70) / 3);
806 else if (CurrSS >= 41 && CurrSS <= 70)
807 RetSS = 78 + ((CurrSS - 40) / 3);
808 else if (CurrSS >= 31 && CurrSS <= 40)
809 RetSS = 66 + (CurrSS - 30);
810 else if (CurrSS >= 21 && CurrSS <= 30)
811 RetSS = 54 + (CurrSS - 20);
812 else if (CurrSS >= 5 && CurrSS <= 20)
813 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
814 else if (CurrSS == 4)
816 else if (CurrSS == 3)
818 else if (CurrSS == 2)
820 else if (CurrSS == 1)
825 //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
827 // Step 2. Smoothing.
829 //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
834 static inline void ieee80211_extract_country_ie(
835 struct ieee80211_device *ieee,
836 struct ieee80211_info_element *info_element,
837 struct ieee80211_network *network,
841 if (IS_DOT11D_ENABLE(ieee)) {
842 if (info_element->len != 0) {
843 memcpy(network->CountryIeBuf, info_element->data, info_element->len);
844 network->CountryIeLen = info_element->len;
846 if (!IS_COUNTRY_IE_VALID(ieee))
847 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
851 // 070305, rcnjko: I update country IE watch dog here because
852 // some AP (e.g. Cisco 1242) don't include country IE in their
853 // probe response frame.
855 if (IS_EQUAL_CIE_SRC(ieee, addr2))
856 UPDATE_CIE_WATCHDOG(ieee);
862 ieee80211_TranslateToDbm(
863 unsigned char SignalStrengthIndex // 0-100 index.
866 unsigned char SignalPower; // in dBm.
868 // Translate to dBm (x=0.5y-95).
869 SignalPower = (int)SignalStrengthIndex * 7 / 10;
874 inline int ieee80211_network_init(
875 struct ieee80211_device *ieee,
876 struct ieee80211_probe_response *beacon,
877 struct ieee80211_network *network,
878 struct ieee80211_rx_stats *stats)
880 #ifdef CONFIG_IEEE80211_DEBUG
884 struct ieee80211_info_element *info_element;
888 u8 curRate = 0, hOpRate = 0, curRate_ex = 0;
890 /* Pull out fixed field data */
891 memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
892 network->capability = beacon->capability;
893 network->last_scanned = jiffies;
894 network->time_stamp[0] = beacon->time_stamp[0];
895 network->time_stamp[1] = beacon->time_stamp[1];
896 network->beacon_interval = beacon->beacon_interval;
897 /* Where to pull this? beacon->listen_interval;*/
898 network->listen_interval = 0x0A;
899 network->rates_len = network->rates_ex_len = 0;
900 network->last_associate = 0;
901 network->ssid_len = 0;
903 network->atim_window = 0;
904 network->QoS_Enable = 0;
906 network->HighestOperaRate = 0;
908 network->Turbo_Enable = 0;
909 network->CountryIeLen = 0;
910 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
912 if (stats->freq == IEEE80211_52GHZ_BAND) {
913 /* for A band (No DS info) */
914 network->channel = stats->received_channel;
916 network->flags |= NETWORK_HAS_CCK;
918 network->wpa_ie_len = 0;
919 network->rsn_ie_len = 0;
921 info_element = &beacon->info_element;
922 left = stats->len - ((void *)info_element - (void *)beacon);
923 while (left >= sizeof(struct ieee80211_info_element_hdr)) {
924 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
925 IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
926 info_element->len + sizeof(struct ieee80211_info_element),
931 switch (info_element->id) {
933 if (ieee80211_is_empty_essid(info_element->data,
934 info_element->len)) {
935 network->flags |= NETWORK_EMPTY_ESSID;
939 network->ssid_len = min(info_element->len,
940 (u8)IW_ESSID_MAX_SIZE);
941 memcpy(network->ssid, info_element->data, network->ssid_len);
942 if (network->ssid_len < IW_ESSID_MAX_SIZE)
943 memset(network->ssid + network->ssid_len, 0,
944 IW_ESSID_MAX_SIZE - network->ssid_len);
946 IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
947 network->ssid, network->ssid_len);
950 case MFIE_TYPE_RATES:
951 #ifdef CONFIG_IEEE80211_DEBUG
954 network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
955 for (i = 0; i < network->rates_len; i++) {
956 network->rates[i] = info_element->data[i];
957 curRate = network->rates[i] & 0x7f;
958 if (hOpRate < curRate)
960 #ifdef CONFIG_IEEE80211_DEBUG
961 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
963 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
964 network->flags |= NETWORK_HAS_OFDM;
965 if (info_element->data[i] &
966 IEEE80211_BASIC_RATE_MASK)
972 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
973 rates_str, network->rates_len);
976 case MFIE_TYPE_RATES_EX:
977 #ifdef CONFIG_IEEE80211_DEBUG
980 network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
981 for (i = 0; i < network->rates_ex_len; i++) {
982 network->rates_ex[i] = info_element->data[i];
983 curRate_ex = network->rates_ex[i] & 0x7f;
984 if (hOpRate < curRate_ex)
985 hOpRate = curRate_ex;
986 #ifdef CONFIG_IEEE80211_DEBUG
987 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
989 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
990 network->flags |= NETWORK_HAS_OFDM;
991 if (info_element->data[i] &
992 IEEE80211_BASIC_RATE_MASK)
998 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
999 rates_str, network->rates_ex_len);
1002 case MFIE_TYPE_DS_SET:
1003 IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
1004 info_element->data[0]);
1005 if (stats->freq == IEEE80211_24GHZ_BAND)
1006 network->channel = info_element->data[0];
1009 case MFIE_TYPE_FH_SET:
1010 IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
1013 case MFIE_TYPE_CF_SET:
1014 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
1019 if (info_element->len < 4)
1022 network->dtim_period = info_element->data[1];
1024 if (ieee->state != IEEE80211_LINKED)
1027 network->last_dtim_sta_time[0] = jiffies;
1028 network->last_dtim_sta_time[1] = stats->mac_time[1];
1030 network->dtim_data = IEEE80211_DTIM_VALID;
1032 if (info_element->data[0] != 0)
1035 if (info_element->data[2] & 1)
1036 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1038 offset = (info_element->data[2] >> 1)*2;
1040 //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1042 /* add and modified for ps 2008.1.22 */
1043 if (ieee->assoc_id < 8*offset ||
1044 ieee->assoc_id > 8*(offset + info_element->len - 3)) {
1048 offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ;
1050 // printk("offset:%x data:%x, ucast:%d\n", offset,
1051 // info_element->data[3+offset] ,
1052 // info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
1054 if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1055 network->dtim_data |= IEEE80211_DTIM_UCAST;
1059 case MFIE_TYPE_IBSS_SET:
1060 IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
1063 case MFIE_TYPE_CHALLENGE:
1064 IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
1067 case MFIE_TYPE_GENERIC:
1069 IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
1071 if (info_element->len >= 4 &&
1072 info_element->data[0] == 0x00 &&
1073 info_element->data[1] == 0x50 &&
1074 info_element->data[2] == 0xf2 &&
1075 info_element->data[3] == 0x01) {
1076 network->wpa_ie_len = min(info_element->len + 2,
1078 memcpy(network->wpa_ie, info_element,
1079 network->wpa_ie_len);
1082 if (info_element->len == 7 &&
1083 info_element->data[0] == 0x00 &&
1084 info_element->data[1] == 0xe0 &&
1085 info_element->data[2] == 0x4c &&
1086 info_element->data[3] == 0x01 &&
1087 info_element->data[4] == 0x02) {
1088 network->Turbo_Enable = 1;
1090 if (1 == stats->nic_type) //nic 87
1093 if (info_element->len >= 5 &&
1094 info_element->data[0] == 0x00 &&
1095 info_element->data[1] == 0x50 &&
1096 info_element->data[2] == 0xf2 &&
1097 info_element->data[3] == 0x02 &&
1098 info_element->data[4] == 0x00) {
1099 //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
1100 //WMM Information Element
1101 network->wmm_info = info_element->data[6];
1102 network->QoS_Enable = 1;
1105 if (info_element->len >= 8 &&
1106 info_element->data[0] == 0x00 &&
1107 info_element->data[1] == 0x50 &&
1108 info_element->data[2] == 0xf2 &&
1109 info_element->data[3] == 0x02 &&
1110 info_element->data[4] == 0x01) {
1111 // Not care about version at present.
1112 //WMM Information Element
1113 //printk(KERN_WARNING "wmm info¶m updated: %x\n", info_element->data[6]);
1114 network->wmm_info = info_element->data[6];
1115 //WMM Parameter Element
1116 memcpy(network->wmm_param, (u8 *)(info_element->data + 8), (info_element->len - 8));
1117 network->QoS_Enable = 1;
1122 IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
1124 network->rsn_ie_len = min(info_element->len + 2,
1126 memcpy(network->rsn_ie, info_element,
1127 network->rsn_ie_len);
1129 case MFIE_TYPE_COUNTRY:
1130 IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1132 // printk("=====>Receive <%s> Country IE\n",network->ssid);
1133 ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2);
1136 IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
1141 left -= sizeof(struct ieee80211_info_element_hdr) +
1143 info_element = (struct ieee80211_info_element *)
1144 &info_element->data[info_element->len];
1147 network->HighestOperaRate = hOpRate;
1150 if (stats->freq == IEEE80211_52GHZ_BAND)
1151 network->mode = IEEE_A;
1153 if (network->flags & NETWORK_HAS_OFDM)
1154 network->mode |= IEEE_G;
1155 if (network->flags & NETWORK_HAS_CCK)
1156 network->mode |= IEEE_B;
1159 if (network->mode == 0) {
1160 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
1162 escape_essid(network->ssid,
1168 if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1169 network->flags |= NETWORK_EMPTY_ESSID;
1171 stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
1172 //stats->noise = stats->signal - stats->noise;
1173 stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
1174 memcpy(&network->stats, stats, sizeof(network->stats));
1179 static inline int is_same_network(struct ieee80211_network *src,
1180 struct ieee80211_network *dst,
1181 struct ieee80211_device *ieee)
1183 /* A network is only a duplicate if the channel, BSSID, ESSID
1184 * and the capability field (in particular IBSS and BSS) all match.
1185 * We treat all <hidden> with the same BSSID and channel
1187 return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1188 //((src->ssid_len == dst->ssid_len) &&
1189 (src->channel == dst->channel) &&
1190 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1191 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1192 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
1193 ((src->capability & WLAN_CAPABILITY_IBSS) ==
1194 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
1195 ((src->capability & WLAN_CAPABILITY_BSS) ==
1196 (dst->capability & WLAN_CAPABILITY_BSS)));
1199 inline void update_network(struct ieee80211_network *dst,
1200 struct ieee80211_network *src)
1202 unsigned char quality = src->stats.signalstrength;
1203 unsigned char signal = 0;
1204 unsigned char noise = 0;
1205 if (dst->stats.signalstrength > 0)
1206 quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
1207 signal = ieee80211_TranslateToDbm(quality);
1208 //noise = signal - src->stats.noise;
1209 if (dst->stats.noise > 0)
1210 noise = (dst->stats.noise * 5 + src->stats.noise)/6;
1211 //if(strcmp(dst->ssid, "linksys_lzm000") == 0)
1212 // printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
1213 memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1214 dst->stats.signalstrength = quality;
1215 dst->stats.signal = signal;
1216 // printk("==================>stats.signal is %d\n",dst->stats.signal);
1217 dst->stats.noise = noise;
1220 dst->capability = src->capability;
1221 memcpy(dst->rates, src->rates, src->rates_len);
1222 dst->rates_len = src->rates_len;
1223 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1224 dst->rates_ex_len = src->rates_ex_len;
1225 dst->HighestOperaRate = src->HighestOperaRate;
1226 //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel);
1228 //YJ,add,080819,for hidden ap
1229 if (src->ssid_len > 0) {
1230 //if(src->ssid_len == 13)
1231 // printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
1232 memset(dst->ssid, 0, dst->ssid_len);
1233 dst->ssid_len = src->ssid_len;
1234 memcpy(dst->ssid, src->ssid, src->ssid_len);
1236 //YJ,add,080819,for hidden ap,end
1238 dst->channel = src->channel;
1239 dst->mode = src->mode;
1240 dst->flags = src->flags;
1241 dst->time_stamp[0] = src->time_stamp[0];
1242 dst->time_stamp[1] = src->time_stamp[1];
1244 dst->beacon_interval = src->beacon_interval;
1245 dst->listen_interval = src->listen_interval;
1246 dst->atim_window = src->atim_window;
1247 dst->dtim_period = src->dtim_period;
1248 dst->dtim_data = src->dtim_data;
1249 dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
1250 dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
1251 // printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
1252 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1253 dst->wpa_ie_len = src->wpa_ie_len;
1254 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1255 dst->rsn_ie_len = src->rsn_ie_len;
1257 dst->last_scanned = jiffies;
1258 /* dst->last_associate is not overwritten */
1259 // disable QoS process now, added by David 2006/7/25
1261 dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
1263 if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
1264 memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
1267 if (src->wmm_param[0].ac_aci_acm_aifsn || \
1268 src->wmm_param[1].ac_aci_acm_aifsn || \
1269 src->wmm_param[2].ac_aci_acm_aifsn || \
1270 src->wmm_param[3].ac_aci_acm_aifsn) {
1271 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
1273 dst->QoS_Enable = src->QoS_Enable;
1275 dst->QoS_Enable = 1;//for Rtl8187 simulation
1277 dst->SignalStrength = src->SignalStrength;
1278 dst->Turbo_Enable = src->Turbo_Enable;
1279 dst->CountryIeLen = src->CountryIeLen;
1280 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
1284 inline void ieee80211_process_probe_response(
1285 struct ieee80211_device *ieee,
1286 struct ieee80211_probe_response *beacon,
1287 struct ieee80211_rx_stats *stats)
1289 struct ieee80211_network network;
1290 struct ieee80211_network *target;
1291 struct ieee80211_network *oldest = NULL;
1292 #ifdef CONFIG_IEEE80211_DEBUG
1293 struct ieee80211_info_element *info_element = &beacon->info_element;
1295 unsigned long flags;
1298 u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON) ? 1 : 0; //YJ,add,080819,for hidden ap
1300 memset(&network, 0, sizeof(struct ieee80211_network));
1302 IEEE80211_DEBUG_SCAN(
1303 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1304 escape_essid(info_element->data, info_element->len),
1305 beacon->header.addr3,
1306 (beacon->capability & (1<<0xf)) ? '1' : '0',
1307 (beacon->capability & (1<<0xe)) ? '1' : '0',
1308 (beacon->capability & (1<<0xd)) ? '1' : '0',
1309 (beacon->capability & (1<<0xc)) ? '1' : '0',
1310 (beacon->capability & (1<<0xb)) ? '1' : '0',
1311 (beacon->capability & (1<<0xa)) ? '1' : '0',
1312 (beacon->capability & (1<<0x9)) ? '1' : '0',
1313 (beacon->capability & (1<<0x8)) ? '1' : '0',
1314 (beacon->capability & (1<<0x7)) ? '1' : '0',
1315 (beacon->capability & (1<<0x6)) ? '1' : '0',
1316 (beacon->capability & (1<<0x5)) ? '1' : '0',
1317 (beacon->capability & (1<<0x4)) ? '1' : '0',
1318 (beacon->capability & (1<<0x3)) ? '1' : '0',
1319 (beacon->capability & (1<<0x2)) ? '1' : '0',
1320 (beacon->capability & (1<<0x1)) ? '1' : '0',
1321 (beacon->capability & (1<<0x0)) ? '1' : '0');
1323 if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1324 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1325 escape_essid(info_element->data,
1327 beacon->header.addr3,
1328 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1329 IEEE80211_STYPE_PROBE_RESP ?
1330 "PROBE RESPONSE" : "BEACON");
1334 // For Asus EeePc request,
1335 // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
1336 // wireless adapter should follow the country code.
1337 // (2) If there is no any country code in beacon,
1338 // then wireless adapter should do active scan from ch1~11 and
1339 // passive scan from ch12~14
1340 if (ieee->bGlobalDomain) {
1341 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP) {
1342 // Case 1: Country code
1343 if (IS_COUNTRY_IE_VALID(ieee)) {
1344 if (!IsLegalChannel(ieee, network.channel)) {
1345 printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
1349 // Case 2: No any country code.
1351 // Filter over channel ch12~14
1352 if (network.channel > 11) {
1353 printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
1358 // Case 1: Country code
1359 if (IS_COUNTRY_IE_VALID(ieee)) {
1360 if (!IsLegalChannel(ieee, network.channel)) {
1361 printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network.channel);
1365 // Case 2: No any country code.
1367 // Filter over channel ch12~14
1368 if (network.channel > 14) {
1369 printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network.channel);
1375 /* The network parsed correctly -- so now we scan our known networks
1376 * to see if we can find it in our list.
1378 * NOTE: This search is definitely not optimized. Once its doing
1379 * the "right thing" we'll optimize it for efficiency if
1382 /* Search for this entry in the list and update it if it is
1385 spin_lock_irqsave(&ieee->lock, flags);
1387 if (is_same_network(&ieee->current_network, &network, ieee)) {
1388 wmm_info = ieee->current_network.wmm_info;
1389 //YJ,add,080819,for hidden ap
1391 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
1392 else if (ieee->state == IEEE80211_LINKED)
1393 ieee->NumRxBcnInPeriod++;
1394 //YJ,add,080819,for hidden ap,end
1395 //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
1396 update_network(&ieee->current_network, &network);
1399 list_for_each_entry(target, &ieee->network_list, list) {
1400 if (is_same_network(target, &network, ieee))
1402 if ((oldest == NULL) ||
1403 (target->last_scanned < oldest->last_scanned))
1407 /* If we didn't find a match, then get a new network slot to initialize
1408 * with this beacon's information */
1409 if (&target->list == &ieee->network_list) {
1410 if (list_empty(&ieee->network_free_list)) {
1411 /* If there are no more slots, expire the oldest */
1412 list_del(&oldest->list);
1414 IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
1416 escape_essid(target->ssid,
1420 /* Otherwise just pull from the free list */
1421 target = list_entry(ieee->network_free_list.next,
1422 struct ieee80211_network, list);
1423 list_del(ieee->network_free_list.next);
1427 #ifdef CONFIG_IEEE80211_DEBUG
1428 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1429 escape_essid(network.ssid,
1432 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1433 IEEE80211_STYPE_PROBE_RESP ?
1434 "PROBE RESPONSE" : "BEACON");
1437 memcpy(target, &network, sizeof(*target));
1438 list_add_tail(&target->list, &ieee->network_list);
1440 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1441 escape_essid(target->ssid,
1444 WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1445 IEEE80211_STYPE_PROBE_RESP ?
1446 "PROBE RESPONSE" : "BEACON");
1448 /* we have an entry and we are going to update it. But this entry may
1449 * be already expired. In this case we do the same as we found a new
1450 * net and call the new_net handler
1452 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
1453 //YJ,add,080819,for hidden ap
1455 network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
1456 //if(strncmp(network.ssid, "linksys-c",9) == 0)
1457 // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
1458 if (((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
1459 && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
1460 || ((ieee->current_network.ssid_len == network.ssid_len) && (strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
1462 //YJ,add,080819,for hidden ap,end
1463 update_network(target, &network);
1466 spin_unlock_irqrestore(&ieee->lock, flags);
1469 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1470 struct ieee80211_hdr_4addr *header,
1471 struct ieee80211_rx_stats *stats)
1473 switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1475 case IEEE80211_STYPE_BEACON:
1476 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1477 WLAN_FC_GET_STYPE(header->frame_ctl));
1478 IEEE80211_DEBUG_SCAN("Beacon\n");
1479 ieee80211_process_probe_response(
1480 ieee, (struct ieee80211_probe_response *)header, stats);
1483 case IEEE80211_STYPE_PROBE_RESP:
1484 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1485 WLAN_FC_GET_STYPE(header->frame_ctl));
1486 IEEE80211_DEBUG_SCAN("Probe response\n");
1487 ieee80211_process_probe_response(
1488 ieee, (struct ieee80211_probe_response *)header, stats);