2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
7 * This file is to be included into hostap.c when S/W AP functionality is
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
23 #include "hostap_wlan.h"
25 #include "hostap_ap.h"
27 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
29 module_param_array(other_ap_policy, int, NULL, 0444);
30 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
32 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
34 module_param_array(ap_max_inactivity, int, NULL, 0444);
35 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
38 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
39 module_param_array(ap_bridge_packets, int, NULL, 0444);
40 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
43 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
44 module_param_array(autom_ap_wds, int, NULL, 0444);
45 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
49 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
50 static void hostap_event_expired_sta(struct net_device *dev,
51 struct sta_info *sta);
52 static void handle_add_proc_queue(struct work_struct *work);
54 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
55 static void handle_wds_oper_queue(struct work_struct *work);
56 static void prism2_send_mgmt(struct net_device *dev,
57 u16 type_subtype, char *body,
58 int body_len, u8 *addr, u16 tx_cb_idx);
59 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
62 #ifndef PRISM2_NO_PROCFS_DEBUG
63 static int ap_debug_proc_read(char *page, char **start, off_t off,
64 int count, int *eof, void *data)
67 struct ap_data *ap = (struct ap_data *) data;
74 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
75 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
76 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
77 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
78 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
79 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
80 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
81 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
85 #endif /* PRISM2_NO_PROCFS_DEBUG */
88 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
90 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
91 ap->sta_hash[STA_HASH(sta->addr)] = sta;
94 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
98 s = ap->sta_hash[STA_HASH(sta->addr)];
99 if (s == NULL) return;
100 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
101 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
105 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
108 if (s->hnext != NULL)
109 s->hnext = s->hnext->hnext;
111 printk("AP: could not remove STA " MACSTR " from hash table\n",
115 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
117 if (sta->ap && sta->local)
118 hostap_event_expired_sta(sta->local->dev, sta);
120 if (ap->proc != NULL) {
122 sprintf(name, MACSTR, MAC2STR(sta->addr));
123 remove_proc_entry(name, ap->proc);
127 sta->crypt->ops->deinit(sta->crypt->priv);
132 skb_queue_purge(&sta->tx_buf);
135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
137 ap->sta_aid[sta->aid - 1] = NULL;
139 if (!sta->ap && sta->u.sta.challenge)
140 kfree(sta->u.sta.challenge);
141 del_timer(&sta->timer);
142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
148 static void hostap_set_tim(local_info_t *local, int aid, int set)
150 if (local->func->set_tim)
151 local->func->set_tim(local->dev, aid, set);
155 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
157 union iwreq_data wrqu;
158 memset(&wrqu, 0, sizeof(wrqu));
159 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
160 wrqu.addr.sa_family = ARPHRD_ETHER;
161 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
165 static void hostap_event_expired_sta(struct net_device *dev,
166 struct sta_info *sta)
168 union iwreq_data wrqu;
169 memset(&wrqu, 0, sizeof(wrqu));
170 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
171 wrqu.addr.sa_family = ARPHRD_ETHER;
172 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
176 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
178 static void ap_handle_timer(unsigned long data)
180 struct sta_info *sta = (struct sta_info *) data;
183 unsigned long next_time = 0;
186 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
187 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
193 was_assoc = sta->flags & WLAN_STA_ASSOC;
195 if (atomic_read(&sta->users) != 0)
196 next_time = jiffies + HZ;
197 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
198 next_time = jiffies + ap->max_inactivity;
200 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
201 /* station activity detected; reset timeout state */
202 sta->timeout_next = STA_NULLFUNC;
203 next_time = sta->last_rx + ap->max_inactivity;
204 } else if (sta->timeout_next == STA_DISASSOC &&
205 !(sta->flags & WLAN_STA_PENDING_POLL)) {
206 /* STA ACKed data nullfunc frame poll */
207 sta->timeout_next = STA_NULLFUNC;
208 next_time = jiffies + ap->max_inactivity;
212 sta->timer.expires = next_time;
213 add_timer(&sta->timer);
218 sta->timeout_next = STA_DEAUTH;
220 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
221 spin_lock(&ap->sta_table_lock);
222 ap_sta_hash_del(ap, sta);
223 list_del(&sta->list);
224 spin_unlock(&ap->sta_table_lock);
225 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
226 } else if (sta->timeout_next == STA_DISASSOC)
227 sta->flags &= ~WLAN_STA_ASSOC;
229 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
230 hostap_event_expired_sta(local->dev, sta);
232 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
233 !skb_queue_empty(&sta->tx_buf)) {
234 hostap_set_tim(local, sta->aid, 0);
235 sta->flags &= ~WLAN_STA_TIM;
239 if (ap->autom_ap_wds) {
240 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
241 "connection to AP " MACSTR "\n",
242 local->dev->name, MAC2STR(sta->addr));
243 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
245 } else if (sta->timeout_next == STA_NULLFUNC) {
246 /* send data frame to poll STA and check whether this frame
248 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
249 * it is apparently not retried so TX Exc events are not
251 sta->flags |= WLAN_STA_PENDING_POLL;
252 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
253 IEEE80211_STYPE_DATA, NULL, 0,
254 sta->addr, ap->tx_callback_poll);
256 int deauth = sta->timeout_next == STA_DEAUTH;
258 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
259 "(last=%lu, jiffies=%lu)\n",
261 deauth ? "deauthentication" : "disassociation",
262 MAC2STR(sta->addr), sta->last_rx, jiffies);
264 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
266 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
267 (deauth ? IEEE80211_STYPE_DEAUTH :
268 IEEE80211_STYPE_DISASSOC),
269 (char *) &resp, 2, sta->addr, 0);
272 if (sta->timeout_next == STA_DEAUTH) {
273 if (sta->flags & WLAN_STA_PERM) {
274 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
275 "removed, but it has 'perm' flag\n",
276 local->dev->name, MAC2STR(sta->addr));
278 ap_free_sta(ap, sta);
282 if (sta->timeout_next == STA_NULLFUNC) {
283 sta->timeout_next = STA_DISASSOC;
284 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
286 sta->timeout_next = STA_DEAUTH;
287 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
290 add_timer(&sta->timer);
294 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
301 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
302 memset(addr, 0xff, ETH_ALEN);
304 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
306 /* deauth message sent; try to resend it few times; the message is
307 * broadcast, so it may be delayed until next DTIM; there is not much
308 * else we can do at this point since the driver is going to be shut
310 for (i = 0; i < 5; i++) {
311 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
312 IEEE80211_STYPE_DEAUTH,
313 (char *) &resp, 2, addr, 0);
315 if (!resend || ap->num_sta <= 0)
323 static int ap_control_proc_read(char *page, char **start, off_t off,
324 int count, int *eof, void *data)
327 struct ap_data *ap = (struct ap_data *) data;
329 struct list_head *ptr;
330 struct mac_entry *entry;
337 switch (ap->mac_restrictions.policy) {
338 case MAC_POLICY_OPEN:
341 case MAC_POLICY_ALLOW:
342 policy_txt = "allow";
344 case MAC_POLICY_DENY:
348 policy_txt = "unknown";
351 p += sprintf(p, "MAC policy: %s\n", policy_txt);
352 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
353 p += sprintf(p, "MAC list:\n");
354 spin_lock_bh(&ap->mac_restrictions.lock);
355 for (ptr = ap->mac_restrictions.mac_list.next;
356 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
357 if (p - page > PAGE_SIZE - 80) {
358 p += sprintf(p, "All entries did not fit one page.\n");
362 entry = list_entry(ptr, struct mac_entry, list);
363 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
365 spin_unlock_bh(&ap->mac_restrictions.lock);
371 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
373 struct mac_entry *entry;
375 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
379 memcpy(entry->addr, mac, ETH_ALEN);
381 spin_lock_bh(&mac_restrictions->lock);
382 list_add_tail(&entry->list, &mac_restrictions->mac_list);
383 mac_restrictions->entries++;
384 spin_unlock_bh(&mac_restrictions->lock);
390 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
392 struct list_head *ptr;
393 struct mac_entry *entry;
395 spin_lock_bh(&mac_restrictions->lock);
396 for (ptr = mac_restrictions->mac_list.next;
397 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
398 entry = list_entry(ptr, struct mac_entry, list);
400 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
403 mac_restrictions->entries--;
404 spin_unlock_bh(&mac_restrictions->lock);
408 spin_unlock_bh(&mac_restrictions->lock);
413 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
416 struct list_head *ptr;
417 struct mac_entry *entry;
420 if (mac_restrictions->policy == MAC_POLICY_OPEN)
423 spin_lock_bh(&mac_restrictions->lock);
424 for (ptr = mac_restrictions->mac_list.next;
425 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
426 entry = list_entry(ptr, struct mac_entry, list);
428 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
433 spin_unlock_bh(&mac_restrictions->lock);
435 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
442 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
444 struct list_head *ptr, *n;
445 struct mac_entry *entry;
447 if (mac_restrictions->entries == 0)
450 spin_lock_bh(&mac_restrictions->lock);
451 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
452 ptr != &mac_restrictions->mac_list;
453 ptr = n, n = ptr->next) {
454 entry = list_entry(ptr, struct mac_entry, list);
458 mac_restrictions->entries = 0;
459 spin_unlock_bh(&mac_restrictions->lock);
463 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
465 struct sta_info *sta;
468 spin_lock_bh(&ap->sta_table_lock);
469 sta = ap_get_sta(ap, mac);
471 ap_sta_hash_del(ap, sta);
472 list_del(&sta->list);
474 spin_unlock_bh(&ap->sta_table_lock);
479 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
480 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
481 (char *) &resp, 2, sta->addr, 0);
483 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
484 hostap_event_expired_sta(dev, sta);
486 ap_free_sta(ap, sta);
491 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
494 void ap_control_kickall(struct ap_data *ap)
496 struct list_head *ptr, *n;
497 struct sta_info *sta;
499 spin_lock_bh(&ap->sta_table_lock);
500 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
501 ptr = n, n = ptr->next) {
502 sta = list_entry(ptr, struct sta_info, list);
503 ap_sta_hash_del(ap, sta);
504 list_del(&sta->list);
505 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
506 hostap_event_expired_sta(sta->local->dev, sta);
507 ap_free_sta(ap, sta);
509 spin_unlock_bh(&ap->sta_table_lock);
513 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
515 #define PROC_LIMIT (PAGE_SIZE - 80)
517 static int prism2_ap_proc_read(char *page, char **start, off_t off,
518 int count, int *eof, void *data)
521 struct ap_data *ap = (struct ap_data *) data;
522 struct list_head *ptr;
525 if (off > PROC_LIMIT) {
530 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
531 spin_lock_bh(&ap->sta_table_lock);
532 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
533 struct sta_info *sta = (struct sta_info *) ptr;
538 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
539 sta->u.ap.channel, sta->last_rx_signal,
540 sta->last_rx_silence, sta->last_rx_rate);
541 for (i = 0; i < sta->u.ap.ssid_len; i++)
542 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
543 sta->u.ap.ssid[i] < 127) ?
546 p += sprintf(p, "'");
547 if (sta->capability & WLAN_CAPABILITY_ESS)
548 p += sprintf(p, " [ESS]");
549 if (sta->capability & WLAN_CAPABILITY_IBSS)
550 p += sprintf(p, " [IBSS]");
551 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
552 p += sprintf(p, " [WEP]");
553 p += sprintf(p, "\n");
555 if ((p - page) > PROC_LIMIT) {
556 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
560 spin_unlock_bh(&ap->sta_table_lock);
562 if ((p - page) <= off) {
569 return (p - page - off);
571 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
574 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
579 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
580 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
581 "firmware upgrade recommended\n");
582 ap->nullfunc_ack = 1;
584 ap->nullfunc_ack = 0;
586 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
587 printk(KERN_WARNING "%s: Warning: secondary station firmware "
588 "version 1.4.2 does not seem to work in Host AP mode\n",
589 ap->local->dev->name);
594 /* Called only as a tasklet (software IRQ) */
595 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
597 struct ap_data *ap = data;
599 struct ieee80211_hdr_4addr *hdr;
601 if (!ap->local->hostapd || !ap->local->apdev) {
606 hdr = (struct ieee80211_hdr_4addr *) skb->data;
607 fc = le16_to_cpu(hdr->frame_ctl);
609 /* Pass the TX callback frame to the hostapd; use 802.11 header version
610 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
612 fc &= ~IEEE80211_FCTL_VERS;
613 fc |= ok ? BIT(1) : BIT(0);
614 hdr->frame_ctl = cpu_to_le16(fc);
616 skb->dev = ap->local->apdev;
617 skb_pull(skb, hostap_80211_get_hdrlen(fc));
618 skb->pkt_type = PACKET_OTHERHOST;
619 skb->protocol = __constant_htons(ETH_P_802_2);
620 memset(skb->cb, 0, sizeof(skb->cb));
625 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
626 /* Called only as a tasklet (software IRQ) */
627 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
629 struct ap_data *ap = data;
630 struct net_device *dev = ap->local->dev;
631 struct ieee80211_hdr_4addr *hdr;
632 u16 fc, *pos, auth_alg, auth_transaction, status;
633 struct sta_info *sta = NULL;
636 if (ap->local->hostapd) {
641 hdr = (struct ieee80211_hdr_4addr *) skb->data;
642 fc = le16_to_cpu(hdr->frame_ctl);
643 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
644 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
645 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
646 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
647 "frame\n", dev->name);
652 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
653 auth_alg = le16_to_cpu(*pos++);
654 auth_transaction = le16_to_cpu(*pos++);
655 status = le16_to_cpu(*pos++);
658 txt = "frame was not ACKed";
662 spin_lock(&ap->sta_table_lock);
663 sta = ap_get_sta(ap, hdr->addr1);
665 atomic_inc(&sta->users);
666 spin_unlock(&ap->sta_table_lock);
669 txt = "STA not found";
673 if (status == WLAN_STATUS_SUCCESS &&
674 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
675 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
676 txt = "STA authenticated";
677 sta->flags |= WLAN_STA_AUTH;
678 sta->last_auth = jiffies;
679 } else if (status != WLAN_STATUS_SUCCESS)
680 txt = "authentication failed";
684 atomic_dec(&sta->users);
686 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
688 dev->name, MAC2STR(hdr->addr1), auth_alg,
689 auth_transaction, status, txt);
695 /* Called only as a tasklet (software IRQ) */
696 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
698 struct ap_data *ap = data;
699 struct net_device *dev = ap->local->dev;
700 struct ieee80211_hdr_4addr *hdr;
701 u16 fc, *pos, status;
702 struct sta_info *sta = NULL;
705 if (ap->local->hostapd) {
710 hdr = (struct ieee80211_hdr_4addr *) skb->data;
711 fc = le16_to_cpu(hdr->frame_ctl);
712 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
713 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
714 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
715 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
716 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
717 "frame\n", dev->name);
723 txt = "frame was not ACKed";
727 spin_lock(&ap->sta_table_lock);
728 sta = ap_get_sta(ap, hdr->addr1);
730 atomic_inc(&sta->users);
731 spin_unlock(&ap->sta_table_lock);
734 txt = "STA not found";
738 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
740 status = le16_to_cpu(*pos++);
741 if (status == WLAN_STATUS_SUCCESS) {
742 if (!(sta->flags & WLAN_STA_ASSOC))
743 hostap_event_new_sta(dev, sta);
744 txt = "STA associated";
745 sta->flags |= WLAN_STA_ASSOC;
746 sta->last_assoc = jiffies;
748 txt = "association failed";
752 atomic_dec(&sta->users);
754 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
755 dev->name, MAC2STR(hdr->addr1), txt);
760 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
761 * in verifying whether the STA is still present. */
762 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
764 struct ap_data *ap = data;
765 struct ieee80211_hdr_4addr *hdr;
766 struct sta_info *sta;
770 hdr = (struct ieee80211_hdr_4addr *) skb->data;
772 spin_lock(&ap->sta_table_lock);
773 sta = ap_get_sta(ap, hdr->addr1);
775 sta->flags &= ~WLAN_STA_PENDING_POLL;
776 spin_unlock(&ap->sta_table_lock);
778 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
779 "poll frame\n", ap->local->dev->name,
780 MAC2STR(hdr->addr1));
786 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
789 void hostap_init_data(local_info_t *local)
791 struct ap_data *ap = local->ap;
794 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
797 memset(ap, 0, sizeof(struct ap_data));
800 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
801 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
803 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
804 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
806 spin_lock_init(&ap->sta_table_lock);
807 INIT_LIST_HEAD(&ap->sta_list);
809 /* Initialize task queue structure for AP management */
810 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
812 ap->tx_callback_idx =
813 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
814 if (ap->tx_callback_idx == 0)
815 printk(KERN_WARNING "%s: failed to register TX callback for "
816 "AP\n", local->dev->name);
817 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
818 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
820 ap->tx_callback_auth =
821 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
822 ap->tx_callback_assoc =
823 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
824 ap->tx_callback_poll =
825 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
826 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
827 ap->tx_callback_poll == 0)
828 printk(KERN_WARNING "%s: failed to register TX callback for "
829 "AP\n", local->dev->name);
831 spin_lock_init(&ap->mac_restrictions.lock);
832 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
833 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
839 void hostap_init_ap_proc(local_info_t *local)
841 struct ap_data *ap = local->ap;
843 ap->proc = local->proc;
844 if (ap->proc == NULL)
847 #ifndef PRISM2_NO_PROCFS_DEBUG
848 create_proc_read_entry("ap_debug", 0, ap->proc,
849 ap_debug_proc_read, ap);
850 #endif /* PRISM2_NO_PROCFS_DEBUG */
852 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
853 create_proc_read_entry("ap_control", 0, ap->proc,
854 ap_control_proc_read, ap);
855 create_proc_read_entry("ap", 0, ap->proc,
856 prism2_ap_proc_read, ap);
857 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
862 void hostap_free_data(struct ap_data *ap)
864 struct list_head *n, *ptr;
866 if (ap == NULL || !ap->initialized) {
867 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
868 "initialized - skip resource freeing\n");
872 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
874 ap->crypt->deinit(ap->crypt_priv);
875 ap->crypt = ap->crypt_priv = NULL;
876 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
878 list_for_each_safe(ptr, n, &ap->sta_list) {
879 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
880 ap_sta_hash_del(ap, sta);
881 list_del(&sta->list);
882 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
883 hostap_event_expired_sta(sta->local->dev, sta);
884 ap_free_sta(ap, sta);
887 #ifndef PRISM2_NO_PROCFS_DEBUG
888 if (ap->proc != NULL) {
889 remove_proc_entry("ap_debug", ap->proc);
891 #endif /* PRISM2_NO_PROCFS_DEBUG */
893 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
894 if (ap->proc != NULL) {
895 remove_proc_entry("ap", ap->proc);
896 remove_proc_entry("ap_control", ap->proc);
898 ap_control_flush_macs(&ap->mac_restrictions);
899 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
905 /* caller should have mutex for AP STA list handling */
906 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
910 s = ap->sta_hash[STA_HASH(sta)];
911 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
917 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
919 /* Called from timer handler and from scheduled AP queue handlers */
920 static void prism2_send_mgmt(struct net_device *dev,
921 u16 type_subtype, char *body,
922 int body_len, u8 *addr, u16 tx_cb_idx)
924 struct hostap_interface *iface;
926 struct ieee80211_hdr_4addr *hdr;
929 struct hostap_skb_tx_data *meta;
932 iface = netdev_priv(dev);
933 local = iface->local;
934 dev = local->dev; /* always use master radio device */
935 iface = netdev_priv(dev);
937 if (!(dev->flags & IFF_UP)) {
938 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
939 "cannot send frame\n", dev->name);
943 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
945 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
951 hdrlen = hostap_80211_get_hdrlen(fc);
952 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
954 memcpy(skb_put(skb, body_len), body, body_len);
956 memset(hdr, 0, hdrlen);
958 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
959 * tx_control instead of using local->tx_control */
962 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
963 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
964 fc |= IEEE80211_FCTL_FROMDS;
965 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
966 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
967 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
968 /* control:ACK does not have addr2 or addr3 */
969 memset(hdr->addr2, 0, ETH_ALEN);
970 memset(hdr->addr3, 0, ETH_ALEN);
972 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
973 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
976 hdr->frame_ctl = cpu_to_le16(fc);
978 meta = (struct hostap_skb_tx_data *) skb->cb;
979 memset(meta, 0, sizeof(*meta));
980 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
982 meta->tx_cb_idx = tx_cb_idx;
985 skb->mac.raw = skb->nh.raw = skb->data;
988 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
991 static int prism2_sta_proc_read(char *page, char **start, off_t off,
992 int count, int *eof, void *data)
995 struct sta_info *sta = (struct sta_info *) data;
998 /* FIX: possible race condition.. the STA data could have just expired,
999 * but proc entry was still here so that the read could have started;
1000 * some locking should be done here.. */
1007 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1008 "flags=0x%04x%s%s%s%s%s%s%s\n"
1009 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1010 sta->ap ? "AP" : "STA",
1011 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1013 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1014 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1015 sta->flags & WLAN_STA_PS ? " PS" : "",
1016 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1017 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1018 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1019 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1020 sta->capability, sta->listen_interval);
1021 /* supported_rates: 500 kbit/s units with msb ignored */
1022 for (i = 0; i < sizeof(sta->supported_rates); i++)
1023 if (sta->supported_rates[i] != 0)
1024 p += sprintf(p, "%d%sMbps ",
1025 (sta->supported_rates[i] & 0x7f) / 2,
1026 sta->supported_rates[i] & 1 ? ".5" : "");
1027 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1028 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1030 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1031 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1032 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1034 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1035 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1037 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1038 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1039 sta->last_rx_silence,
1040 sta->last_rx_signal, sta->last_rx_rate / 10,
1041 sta->last_rx_rate % 10 ? ".5" : "",
1042 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1043 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1044 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1045 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1046 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1047 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1049 if (sta->u.ap.channel >= 0)
1050 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1051 p += sprintf(p, "ssid=");
1052 for (i = 0; i < sta->u.ap.ssid_len; i++)
1053 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1054 sta->u.ap.ssid[i] < 127) ?
1057 p += sprintf(p, "\n");
1059 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1065 static void handle_add_proc_queue(struct work_struct *work)
1067 struct ap_data *ap = container_of(work, struct ap_data,
1068 add_sta_proc_queue);
1069 struct sta_info *sta;
1071 struct add_sta_proc_data *entry, *prev;
1073 entry = ap->add_sta_proc_entries;
1074 ap->add_sta_proc_entries = NULL;
1077 spin_lock_bh(&ap->sta_table_lock);
1078 sta = ap_get_sta(ap, entry->addr);
1080 atomic_inc(&sta->users);
1081 spin_unlock_bh(&ap->sta_table_lock);
1084 sprintf(name, MACSTR, MAC2STR(sta->addr));
1085 sta->proc = create_proc_read_entry(
1087 prism2_sta_proc_read, sta);
1089 atomic_dec(&sta->users);
1093 entry = entry->next;
1099 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1101 struct sta_info *sta;
1103 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1105 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1109 /* initialize STA info data */
1110 sta->local = ap->local;
1111 skb_queue_head_init(&sta->tx_buf);
1112 memcpy(sta->addr, addr, ETH_ALEN);
1114 atomic_inc(&sta->users);
1115 spin_lock_bh(&ap->sta_table_lock);
1116 list_add(&sta->list, &ap->sta_list);
1118 ap_sta_hash_add(ap, sta);
1119 spin_unlock_bh(&ap->sta_table_lock);
1122 struct add_sta_proc_data *entry;
1123 /* schedule a non-interrupt context process to add a procfs
1124 * entry for the STA since procfs code use GFP_KERNEL */
1125 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1127 memcpy(entry->addr, sta->addr, ETH_ALEN);
1128 entry->next = ap->add_sta_proc_entries;
1129 ap->add_sta_proc_entries = entry;
1130 schedule_work(&ap->add_sta_proc_queue);
1132 printk(KERN_DEBUG "Failed to add STA proc data\n");
1135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1136 init_timer(&sta->timer);
1137 sta->timer.expires = jiffies + ap->max_inactivity;
1138 sta->timer.data = (unsigned long) sta;
1139 sta->timer.function = ap_handle_timer;
1140 if (!ap->local->hostapd)
1141 add_timer(&sta->timer);
1142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1148 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1149 local_info_t *local)
1151 if (rateidx > sta->tx_max_rate ||
1152 !(sta->tx_supp_rates & (1 << rateidx)))
1155 if (local->tx_rate_control != 0 &&
1156 !(local->tx_rate_control & (1 << rateidx)))
1163 static void prism2_check_tx_rates(struct sta_info *sta)
1167 sta->tx_supp_rates = 0;
1168 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1169 if ((sta->supported_rates[i] & 0x7f) == 2)
1170 sta->tx_supp_rates |= WLAN_RATE_1M;
1171 if ((sta->supported_rates[i] & 0x7f) == 4)
1172 sta->tx_supp_rates |= WLAN_RATE_2M;
1173 if ((sta->supported_rates[i] & 0x7f) == 11)
1174 sta->tx_supp_rates |= WLAN_RATE_5M5;
1175 if ((sta->supported_rates[i] & 0x7f) == 22)
1176 sta->tx_supp_rates |= WLAN_RATE_11M;
1178 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1179 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1180 sta->tx_max_rate = 0;
1181 if (ap_tx_rate_ok(0, sta, sta->local)) {
1183 sta->tx_rate_idx = 0;
1186 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1187 sta->tx_max_rate = 1;
1188 if (ap_tx_rate_ok(1, sta, sta->local)) {
1190 sta->tx_rate_idx = 1;
1193 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1194 sta->tx_max_rate = 2;
1195 if (ap_tx_rate_ok(2, sta, sta->local)) {
1197 sta->tx_rate_idx = 2;
1200 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1201 sta->tx_max_rate = 3;
1202 if (ap_tx_rate_ok(3, sta, sta->local)) {
1204 sta->tx_rate_idx = 3;
1210 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1212 static void ap_crypt_init(struct ap_data *ap)
1214 ap->crypt = ieee80211_get_crypto_ops("WEP");
1217 if (ap->crypt->init) {
1218 ap->crypt_priv = ap->crypt->init(0);
1219 if (ap->crypt_priv == NULL)
1222 u8 key[WEP_KEY_LEN];
1223 get_random_bytes(key, WEP_KEY_LEN);
1224 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1230 if (ap->crypt == NULL) {
1231 printk(KERN_WARNING "AP could not initialize WEP: load module "
1232 "ieee80211_crypt_wep.ko\n");
1237 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1238 * that WEP algorithm is used for generating challange. This should be unique,
1239 * but otherwise there is not really need for randomness etc. Initialize WEP
1240 * with pseudo random key and then use increasing IV to get unique challenge
1243 * Called only as a scheduled task for pending AP frames.
1245 static char * ap_auth_make_challenge(struct ap_data *ap)
1248 struct sk_buff *skb;
1250 if (ap->crypt == NULL) {
1252 if (ap->crypt == NULL)
1256 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1257 if (tmpbuf == NULL) {
1258 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1262 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1263 ap->crypt->extra_mpdu_prefix_len +
1264 ap->crypt->extra_mpdu_postfix_len);
1270 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1271 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1272 WLAN_AUTH_CHALLENGE_LEN);
1273 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1279 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
1280 WLAN_AUTH_CHALLENGE_LEN);
1287 /* Called only as a scheduled task for pending AP frames. */
1288 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1289 struct hostap_80211_rx_status *rx_stats)
1291 struct net_device *dev = local->dev;
1292 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1294 struct ap_data *ap = local->ap;
1295 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1297 u16 auth_alg, auth_transaction, status_code, *pos;
1298 u16 resp = WLAN_STATUS_SUCCESS, fc;
1299 struct sta_info *sta = NULL;
1300 struct ieee80211_crypt_data *crypt;
1303 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1305 fc = le16_to_cpu(hdr->frame_ctl);
1306 hdrlen = hostap_80211_get_hdrlen(fc);
1309 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1310 "(len=%d) from " MACSTR "\n", dev->name, len,
1311 MAC2STR(hdr->addr2));
1315 spin_lock_bh(&local->ap->sta_table_lock);
1316 sta = ap_get_sta(local->ap, hdr->addr2);
1318 atomic_inc(&sta->users);
1319 spin_unlock_bh(&local->ap->sta_table_lock);
1321 if (sta && sta->crypt)
1325 if (skb->len >= hdrlen + 3)
1326 idx = skb->data[hdrlen + 3] >> 6;
1327 crypt = local->crypt[idx];
1330 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1331 auth_alg = __le16_to_cpu(*pos);
1333 auth_transaction = __le16_to_cpu(*pos);
1335 status_code = __le16_to_cpu(*pos);
1338 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1339 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1340 txt = "authentication denied";
1341 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1345 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1346 auth_alg == WLAN_AUTH_OPEN) ||
1347 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1348 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1350 txt = "unsupported algorithm";
1351 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1357 if (*u == WLAN_EID_CHALLENGE) {
1358 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1359 txt = "invalid challenge len";
1360 resp = WLAN_STATUS_CHALLENGE_FAIL;
1363 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1364 txt = "challenge underflow";
1365 resp = WLAN_STATUS_CHALLENGE_FAIL;
1368 challenge = (char *) (u + 2);
1372 if (sta && sta->ap) {
1373 if (time_after(jiffies, sta->u.ap.last_beacon +
1374 (10 * sta->listen_interval * HZ) / 1024)) {
1375 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1376 " assuming AP " MACSTR " is now STA\n",
1377 dev->name, MAC2STR(sta->addr));
1380 sta->u.sta.challenge = NULL;
1382 txt = "AP trying to authenticate?";
1383 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1388 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1389 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1390 (auth_transaction == 1 ||
1391 (auth_transaction == 3 && sta != NULL &&
1392 sta->u.sta.challenge != NULL)))) {
1394 txt = "unknown authentication transaction number";
1395 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1402 if (local->ap->num_sta >= MAX_STA_COUNT) {
1403 /* FIX: might try to remove some old STAs first? */
1404 txt = "no more room for new STAs";
1405 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1409 sta = ap_add_sta(local->ap, hdr->addr2);
1411 txt = "ap_add_sta failed";
1412 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1418 case WLAN_AUTH_OPEN:
1420 /* IEEE 802.11 standard is not completely clear about
1421 * whether STA is considered authenticated after
1422 * authentication OK frame has been send or after it
1423 * has been ACKed. In order to reduce interoperability
1424 * issues, mark the STA authenticated before ACK. */
1425 sta->flags |= WLAN_STA_AUTH;
1428 case WLAN_AUTH_SHARED_KEY:
1429 if (auth_transaction == 1) {
1430 if (sta->u.sta.challenge == NULL) {
1431 sta->u.sta.challenge =
1432 ap_auth_make_challenge(local->ap);
1433 if (sta->u.sta.challenge == NULL) {
1434 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1439 if (sta->u.sta.challenge == NULL ||
1440 challenge == NULL ||
1441 memcmp(sta->u.sta.challenge, challenge,
1442 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1443 !(fc & IEEE80211_FCTL_PROTECTED)) {
1444 txt = "challenge response incorrect";
1445 resp = WLAN_STATUS_CHALLENGE_FAIL;
1449 txt = "challenge OK - authOK";
1450 /* IEEE 802.11 standard is not completely clear about
1451 * whether STA is considered authenticated after
1452 * authentication OK frame has been send or after it
1453 * has been ACKed. In order to reduce interoperability
1454 * issues, mark the STA authenticated before ACK. */
1455 sta->flags |= WLAN_STA_AUTH;
1456 kfree(sta->u.sta.challenge);
1457 sta->u.sta.challenge = NULL;
1464 *pos = cpu_to_le16(auth_alg);
1466 *pos = cpu_to_le16(auth_transaction + 1);
1468 *pos = cpu_to_le16(resp); /* status_code */
1472 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1473 sta->u.sta.challenge != NULL &&
1474 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1475 u8 *tmp = (u8 *) pos;
1476 *tmp++ = WLAN_EID_CHALLENGE;
1477 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1479 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1480 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1483 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1484 body, olen, hdr->addr2, ap->tx_callback_auth);
1487 sta->last_rx = jiffies;
1488 atomic_dec(&sta->users);
1492 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1493 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1494 dev->name, MAC2STR(hdr->addr2), auth_alg,
1495 auth_transaction, status_code, len, fc, resp, txt);
1500 /* Called only as a scheduled task for pending AP frames. */
1501 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1502 struct hostap_80211_rx_status *rx_stats, int reassoc)
1504 struct net_device *dev = local->dev;
1505 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1506 char body[12], *p, *lpos;
1509 u16 resp = WLAN_STATUS_SUCCESS;
1510 struct sta_info *sta = NULL;
1511 int send_deauth = 0;
1513 u8 prev_ap[ETH_ALEN];
1515 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1517 if (len < (reassoc ? 10 : 4)) {
1518 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1519 "(len=%d, reassoc=%d) from " MACSTR "\n",
1520 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1524 spin_lock_bh(&local->ap->sta_table_lock);
1525 sta = ap_get_sta(local->ap, hdr->addr2);
1526 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1527 spin_unlock_bh(&local->ap->sta_table_lock);
1528 txt = "trying to associate before authentication";
1530 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1531 sta = NULL; /* do not decrement sta->users */
1534 atomic_inc(&sta->users);
1535 spin_unlock_bh(&local->ap->sta_table_lock);
1537 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1538 sta->capability = __le16_to_cpu(*pos);
1540 sta->listen_interval = __le16_to_cpu(*pos);
1544 memcpy(prev_ap, pos, ETH_ALEN);
1545 pos++; pos++; pos++; left -= 6;
1547 memset(prev_ap, 0, ETH_ALEN);
1551 unsigned char *u = (unsigned char *) pos;
1553 if (*u == WLAN_EID_SSID) {
1558 if (ileft > left || ileft > MAX_SSID_LEN) {
1559 txt = "SSID overflow";
1560 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1564 if (ileft != strlen(local->essid) ||
1565 memcmp(local->essid, u, ileft) != 0) {
1566 txt = "not our SSID";
1567 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1575 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1580 if (ileft > left || ileft == 0 ||
1581 ileft > WLAN_SUPP_RATES_MAX) {
1582 txt = "SUPP_RATES len error";
1583 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1587 memset(sta->supported_rates, 0,
1588 sizeof(sta->supported_rates));
1589 memcpy(sta->supported_rates, u, ileft);
1590 prism2_check_tx_rates(sta);
1597 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1598 " data (%d bytes) [",
1599 dev->name, MAC2STR(hdr->addr2), left);
1601 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1604 PDEBUG2(DEBUG_AP, "]\n");
1607 txt = "frame underflow";
1608 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1612 /* get a unique AID */
1614 txt = "OK, old AID";
1616 spin_lock_bh(&local->ap->sta_table_lock);
1617 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1618 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1620 if (sta->aid > MAX_AID_TABLE_SIZE) {
1622 spin_unlock_bh(&local->ap->sta_table_lock);
1623 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1624 txt = "no room for more AIDs";
1626 local->ap->sta_aid[sta->aid - 1] = sta;
1627 spin_unlock_bh(&local->ap->sta_table_lock);
1628 txt = "OK, new AID";
1636 *pos = __constant_cpu_to_le16(
1637 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1640 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1641 * values in beacons/probe responses */
1642 /* FIX: how about privacy and WEP? */
1644 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1648 *pos = __cpu_to_le16(resp);
1651 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1652 BIT(14) | BIT(15)); /* AID */
1655 /* Supported rates (Information element) */
1657 *p++ = WLAN_EID_SUPP_RATES;
1660 if (local->tx_rate_control & WLAN_RATE_1M) {
1661 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1664 if (local->tx_rate_control & WLAN_RATE_2M) {
1665 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1668 if (local->tx_rate_control & WLAN_RATE_5M5) {
1669 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1673 if (local->tx_rate_control & WLAN_RATE_11M) {
1674 *p++ = local->basic_rates & WLAN_RATE_11M ?
1681 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1682 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1683 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1684 IEEE80211_STYPE_ASSOC_RESP)),
1685 body, (u8 *) pos - (u8 *) body,
1687 send_deauth ? 0 : local->ap->tx_callback_assoc);
1690 if (resp == WLAN_STATUS_SUCCESS) {
1691 sta->last_rx = jiffies;
1692 /* STA will be marked associated from TX callback, if
1693 * AssocResp is ACKed */
1695 atomic_dec(&sta->users);
1699 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1700 ") => %d(%d) (%s)\n",
1701 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1702 MAC2STR(prev_ap), resp, send_deauth, txt);
1707 /* Called only as a scheduled task for pending AP frames. */
1708 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1709 struct hostap_80211_rx_status *rx_stats)
1711 struct net_device *dev = local->dev;
1712 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1713 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1715 u16 reason_code, *pos;
1716 struct sta_info *sta = NULL;
1718 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1721 printk("handle_deauth - too short payload (len=%d)\n", len);
1726 reason_code = __le16_to_cpu(*pos);
1728 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1729 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1732 spin_lock_bh(&local->ap->sta_table_lock);
1733 sta = ap_get_sta(local->ap, hdr->addr2);
1735 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1736 hostap_event_expired_sta(local->dev, sta);
1737 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1739 spin_unlock_bh(&local->ap->sta_table_lock);
1741 printk("%s: deauthentication from " MACSTR ", "
1742 "reason_code=%d, but STA not authenticated\n", dev->name,
1743 MAC2STR(hdr->addr2), reason_code);
1748 /* Called only as a scheduled task for pending AP frames. */
1749 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1750 struct hostap_80211_rx_status *rx_stats)
1752 struct net_device *dev = local->dev;
1753 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1754 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1756 u16 reason_code, *pos;
1757 struct sta_info *sta = NULL;
1759 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1762 printk("handle_disassoc - too short payload (len=%d)\n", len);
1767 reason_code = __le16_to_cpu(*pos);
1769 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1770 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1773 spin_lock_bh(&local->ap->sta_table_lock);
1774 sta = ap_get_sta(local->ap, hdr->addr2);
1776 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1777 hostap_event_expired_sta(local->dev, sta);
1778 sta->flags &= ~WLAN_STA_ASSOC;
1780 spin_unlock_bh(&local->ap->sta_table_lock);
1782 printk("%s: disassociation from " MACSTR ", "
1783 "reason_code=%d, but STA not authenticated\n",
1784 dev->name, MAC2STR(hdr->addr2), reason_code);
1789 /* Called only as a scheduled task for pending AP frames. */
1790 static void ap_handle_data_nullfunc(local_info_t *local,
1791 struct ieee80211_hdr_4addr *hdr)
1793 struct net_device *dev = local->dev;
1795 /* some STA f/w's seem to require control::ACK frame for
1796 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1798 * send control::ACK for the data::nullfunc */
1800 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1801 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1802 NULL, 0, hdr->addr2, 0);
1806 /* Called only as a scheduled task for pending AP frames. */
1807 static void ap_handle_dropped_data(local_info_t *local,
1808 struct ieee80211_hdr_4addr *hdr)
1810 struct net_device *dev = local->dev;
1811 struct sta_info *sta;
1814 spin_lock_bh(&local->ap->sta_table_lock);
1815 sta = ap_get_sta(local->ap, hdr->addr2);
1817 atomic_inc(&sta->users);
1818 spin_unlock_bh(&local->ap->sta_table_lock);
1820 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1821 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1822 atomic_dec(&sta->users);
1826 reason = __constant_cpu_to_le16(
1827 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1828 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1829 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1830 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1831 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1834 atomic_dec(&sta->users);
1837 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1840 /* Called only as a scheduled task for pending AP frames. */
1841 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1842 struct sk_buff *skb)
1844 struct hostap_skb_tx_data *meta;
1846 if (!(sta->flags & WLAN_STA_PS)) {
1847 /* Station has moved to non-PS mode, so send all buffered
1848 * frames using normal device queue. */
1849 dev_queue_xmit(skb);
1853 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1854 * be passed through even though STA is using PS */
1855 meta = (struct hostap_skb_tx_data *) skb->cb;
1856 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1857 if (!skb_queue_empty(&sta->tx_buf)) {
1858 /* indicate to STA that more frames follow */
1859 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1861 dev_queue_xmit(skb);
1865 /* Called only as a scheduled task for pending AP frames. */
1866 static void handle_pspoll(local_info_t *local,
1867 struct ieee80211_hdr_4addr *hdr,
1868 struct hostap_80211_rx_status *rx_stats)
1870 struct net_device *dev = local->dev;
1871 struct sta_info *sta;
1873 struct sk_buff *skb;
1875 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1877 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
1878 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
1880 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1881 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1882 " not own MAC\n", MAC2STR(hdr->addr1));
1886 aid = __le16_to_cpu(hdr->duration_id);
1887 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1888 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1891 aid &= ~BIT(15) & ~BIT(14);
1892 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1893 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1896 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1898 spin_lock_bh(&local->ap->sta_table_lock);
1899 sta = ap_get_sta(local->ap, hdr->addr2);
1901 atomic_inc(&sta->users);
1902 spin_unlock_bh(&local->ap->sta_table_lock);
1905 PDEBUG(DEBUG_PS, " STA not found\n");
1908 if (sta->aid != aid) {
1909 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1910 "assoc.aid=%d\n", aid, sta->aid);
1915 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1916 * out (expiry time must be longer than ListenInterval for
1917 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1918 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1919 * sta; store buffer for later use and leave TIM aid bit set? use
1920 * TX event to check whether frame was ACKed?
1923 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1924 /* send buffered frame .. */
1925 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1926 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1928 pspoll_send_buffered(local, sta, skb);
1930 if (sta->flags & WLAN_STA_PS) {
1931 /* send only one buffered packet per PS Poll */
1932 /* FIX: should ignore further PS Polls until the
1933 * buffered packet that was just sent is acknowledged
1934 * (Tx or TxExc event) */
1939 if (skb_queue_empty(&sta->tx_buf)) {
1940 /* try to clear aid from TIM */
1941 if (!(sta->flags & WLAN_STA_TIM))
1942 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1944 hostap_set_tim(local, aid, 0);
1945 sta->flags &= ~WLAN_STA_TIM;
1948 atomic_dec(&sta->users);
1952 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1954 static void handle_wds_oper_queue(struct work_struct *work)
1956 struct ap_data *ap = container_of(work, struct ap_data,
1958 local_info_t *local = ap->local;
1959 struct wds_oper_data *entry, *prev;
1961 spin_lock_bh(&local->lock);
1962 entry = local->ap->wds_oper_entries;
1963 local->ap->wds_oper_entries = NULL;
1964 spin_unlock_bh(&local->lock);
1967 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1968 "to AP " MACSTR "\n",
1970 entry->type == WDS_ADD ? "adding" : "removing",
1971 MAC2STR(entry->addr));
1972 if (entry->type == WDS_ADD)
1973 prism2_wds_add(local, entry->addr, 0);
1974 else if (entry->type == WDS_DEL)
1975 prism2_wds_del(local, entry->addr, 0, 1);
1978 entry = entry->next;
1984 /* Called only as a scheduled task for pending AP frames. */
1985 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1986 struct hostap_80211_rx_status *rx_stats)
1988 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1989 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1991 u16 *pos, beacon_int, capability;
1993 unsigned char *supp_rates = NULL;
1994 int ssid_len = 0, supp_rates_len = 0;
1995 struct sta_info *sta = NULL;
1996 int new_sta = 0, channel = -1;
1998 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2000 if (len < 8 + 2 + 2) {
2001 printk(KERN_DEBUG "handle_beacon - too short payload "
2009 /* Timestamp (8 octets) */
2010 pos += 4; left -= 8;
2011 /* Beacon interval (2 octets) */
2012 beacon_int = __le16_to_cpu(*pos);
2014 /* Capability information (2 octets) */
2015 capability = __le16_to_cpu(*pos);
2018 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2019 capability & WLAN_CAPABILITY_IBSS)
2024 unsigned char *u = (unsigned char *) pos;
2026 if (*u == WLAN_EID_SSID) {
2031 if (ileft > left || ileft > MAX_SSID_LEN) {
2032 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2036 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2037 (ileft != strlen(local->essid) ||
2038 memcmp(local->essid, u, ileft) != 0)) {
2050 if (*u == WLAN_EID_SUPP_RATES) {
2055 if (ileft > left || ileft == 0 || ileft > 8) {
2056 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2061 supp_rates_len = ileft;
2067 if (*u == WLAN_EID_DS_PARAMS) {
2072 if (ileft > left || ileft != 1) {
2073 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2084 spin_lock_bh(&local->ap->sta_table_lock);
2085 sta = ap_get_sta(local->ap, hdr->addr2);
2087 atomic_inc(&sta->users);
2088 spin_unlock_bh(&local->ap->sta_table_lock);
2093 sta = ap_add_sta(local->ap, hdr->addr2);
2095 printk(KERN_INFO "prism2: kmalloc failed for AP "
2096 "data structure\n");
2099 hostap_event_new_sta(local->dev, sta);
2101 /* mark APs authentication and associated for pseudo ad-hoc
2102 * style communication */
2103 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2105 if (local->ap->autom_ap_wds) {
2106 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2112 sta->u.ap.ssid_len = ssid_len;
2113 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2114 sta->u.ap.ssid[ssid_len] = '\0';
2116 sta->u.ap.ssid_len = 0;
2117 sta->u.ap.ssid[0] = '\0';
2119 sta->u.ap.channel = channel;
2121 sta->rx_bytes += len;
2122 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2123 sta->capability = capability;
2124 sta->listen_interval = beacon_int;
2126 atomic_dec(&sta->users);
2129 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2130 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2131 prism2_check_tx_rates(sta);
2135 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2138 /* Called only as a tasklet. */
2139 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2140 struct hostap_80211_rx_status *rx_stats)
2142 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2143 struct net_device *dev = local->dev;
2144 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2145 u16 fc, type, stype;
2146 struct ieee80211_hdr_4addr *hdr;
2148 /* FIX: should give skb->len to handler functions and check that the
2149 * buffer is long enough */
2150 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2151 fc = le16_to_cpu(hdr->frame_ctl);
2152 type = WLAN_FC_GET_TYPE(fc);
2153 stype = WLAN_FC_GET_STYPE(fc);
2155 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2156 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2157 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2159 if (!(fc & IEEE80211_FCTL_TODS) ||
2160 (fc & IEEE80211_FCTL_FROMDS)) {
2161 if (stype == IEEE80211_STYPE_NULLFUNC) {
2162 /* no ToDS nullfunc seems to be used to check
2163 * AP association; so send reject message to
2164 * speed up re-association */
2165 ap_handle_dropped_data(local, hdr);
2168 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2173 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2174 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2175 MACSTR " not own MAC\n",
2176 MAC2STR(hdr->addr1));
2180 if (local->ap->nullfunc_ack &&
2181 stype == IEEE80211_STYPE_NULLFUNC)
2182 ap_handle_data_nullfunc(local, hdr);
2184 ap_handle_dropped_data(local, hdr);
2188 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2189 handle_beacon(local, skb, rx_stats);
2192 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2194 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2195 handle_pspoll(local, hdr, rx_stats);
2199 if (local->hostapd) {
2200 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2201 "subtype=0x%02x\n", type, stype);
2205 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2206 if (type != IEEE80211_FTYPE_MGMT) {
2207 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2211 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2212 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2213 " not own MAC\n", MAC2STR(hdr->addr1));
2217 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2218 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2219 " not own MAC\n", MAC2STR(hdr->addr3));
2224 case IEEE80211_STYPE_ASSOC_REQ:
2225 handle_assoc(local, skb, rx_stats, 0);
2227 case IEEE80211_STYPE_ASSOC_RESP:
2228 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2230 case IEEE80211_STYPE_REASSOC_REQ:
2231 handle_assoc(local, skb, rx_stats, 1);
2233 case IEEE80211_STYPE_REASSOC_RESP:
2234 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2236 case IEEE80211_STYPE_ATIM:
2237 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2239 case IEEE80211_STYPE_DISASSOC:
2240 handle_disassoc(local, skb, rx_stats);
2242 case IEEE80211_STYPE_AUTH:
2243 handle_authen(local, skb, rx_stats);
2245 case IEEE80211_STYPE_DEAUTH:
2246 handle_deauth(local, skb, rx_stats);
2249 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2253 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2260 /* Called only as a tasklet (software IRQ) */
2261 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2262 struct hostap_80211_rx_status *rx_stats)
2264 struct hostap_interface *iface;
2265 local_info_t *local;
2267 struct ieee80211_hdr_4addr *hdr;
2269 iface = netdev_priv(dev);
2270 local = iface->local;
2275 local->stats.rx_packets++;
2277 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2278 fc = le16_to_cpu(hdr->frame_ctl);
2280 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2281 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2282 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
2285 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2286 handle_ap_item(local, skb, rx_stats);
2294 /* Called only as a tasklet (software IRQ) */
2295 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2297 struct sk_buff *skb;
2298 struct ieee80211_hdr_4addr *hdr;
2299 struct hostap_80211_rx_status rx_stats;
2301 if (skb_queue_empty(&sta->tx_buf))
2304 skb = dev_alloc_skb(16);
2306 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2307 "failed\n", local->dev->name);
2311 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
2313 /* Generate a fake pspoll frame to start packet delivery */
2314 hdr->frame_ctl = __constant_cpu_to_le16(
2315 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2316 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2317 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2318 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2320 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2321 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2323 skb->dev = local->dev;
2325 memset(&rx_stats, 0, sizeof(rx_stats));
2326 hostap_rx(local->dev, skb, &rx_stats);
2330 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2331 struct iw_quality qual[], int buf_size,
2334 struct ap_data *ap = local->ap;
2335 struct list_head *ptr;
2338 spin_lock_bh(&ap->sta_table_lock);
2340 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2342 struct sta_info *sta = (struct sta_info *) ptr;
2344 if (aplist && !sta->ap)
2346 addr[count].sa_family = ARPHRD_ETHER;
2347 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2348 if (sta->last_rx_silence == 0)
2349 qual[count].qual = sta->last_rx_signal < 27 ?
2350 0 : (sta->last_rx_signal - 27) * 92 / 127;
2352 qual[count].qual = sta->last_rx_signal -
2353 sta->last_rx_silence - 35;
2354 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2355 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2356 qual[count].updated = sta->last_rx_updated;
2358 sta->last_rx_updated = IW_QUAL_DBM;
2361 if (count >= buf_size)
2364 spin_unlock_bh(&ap->sta_table_lock);
2370 /* Translate our list of Access Points & Stations to a card independant
2371 * format that the Wireless Tools will understand - Jean II */
2372 int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
2374 struct hostap_interface *iface;
2375 local_info_t *local;
2377 struct list_head *ptr;
2378 struct iw_event iwe;
2379 char *current_ev = buffer;
2380 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2381 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2385 iface = netdev_priv(dev);
2386 local = iface->local;
2389 spin_lock_bh(&ap->sta_table_lock);
2391 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2393 struct sta_info *sta = (struct sta_info *) ptr;
2395 /* First entry *MUST* be the AP MAC address */
2396 memset(&iwe, 0, sizeof(iwe));
2397 iwe.cmd = SIOCGIWAP;
2398 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2399 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2400 iwe.len = IW_EV_ADDR_LEN;
2401 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2404 /* Use the mode to indicate if it's a station or
2405 * an Access Point */
2406 memset(&iwe, 0, sizeof(iwe));
2407 iwe.cmd = SIOCGIWMODE;
2409 iwe.u.mode = IW_MODE_MASTER;
2411 iwe.u.mode = IW_MODE_INFRA;
2412 iwe.len = IW_EV_UINT_LEN;
2413 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2417 memset(&iwe, 0, sizeof(iwe));
2419 if (sta->last_rx_silence == 0)
2420 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2421 0 : (sta->last_rx_signal - 27) * 92 / 127;
2423 iwe.u.qual.qual = sta->last_rx_signal -
2424 sta->last_rx_silence - 35;
2425 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2426 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2427 iwe.u.qual.updated = sta->last_rx_updated;
2428 iwe.len = IW_EV_QUAL_LEN;
2429 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2432 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2434 memset(&iwe, 0, sizeof(iwe));
2435 iwe.cmd = SIOCGIWESSID;
2436 iwe.u.data.length = sta->u.ap.ssid_len;
2437 iwe.u.data.flags = 1;
2438 current_ev = iwe_stream_add_point(current_ev, end_buf,
2442 memset(&iwe, 0, sizeof(iwe));
2443 iwe.cmd = SIOCGIWENCODE;
2444 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2446 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2448 iwe.u.data.flags = IW_ENCODE_DISABLED;
2449 current_ev = iwe_stream_add_point(current_ev, end_buf,
2452 /* 0 byte memcpy */);
2454 if (sta->u.ap.channel > 0 &&
2455 sta->u.ap.channel <= FREQ_COUNT) {
2456 memset(&iwe, 0, sizeof(iwe));
2457 iwe.cmd = SIOCGIWFREQ;
2458 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2461 current_ev = iwe_stream_add_event(
2462 current_ev, end_buf, &iwe,
2466 memset(&iwe, 0, sizeof(iwe));
2467 iwe.cmd = IWEVCUSTOM;
2468 sprintf(buf, "beacon_interval=%d",
2469 sta->listen_interval);
2470 iwe.u.data.length = strlen(buf);
2471 current_ev = iwe_stream_add_point(current_ev, end_buf,
2474 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2476 sta->last_rx_updated = IW_QUAL_DBM;
2478 /* To be continued, we should make good use of IWEVCUSTOM */
2481 spin_unlock_bh(&ap->sta_table_lock);
2483 return current_ev - buffer;
2487 static int prism2_hostapd_add_sta(struct ap_data *ap,
2488 struct prism2_hostapd_param *param)
2490 struct sta_info *sta;
2492 spin_lock_bh(&ap->sta_table_lock);
2493 sta = ap_get_sta(ap, param->sta_addr);
2495 atomic_inc(&sta->users);
2496 spin_unlock_bh(&ap->sta_table_lock);
2499 sta = ap_add_sta(ap, param->sta_addr);
2504 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2505 hostap_event_new_sta(sta->local->dev, sta);
2507 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2508 sta->last_rx = jiffies;
2509 sta->aid = param->u.add_sta.aid;
2510 sta->capability = param->u.add_sta.capability;
2511 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2512 if (sta->tx_supp_rates & WLAN_RATE_1M)
2513 sta->supported_rates[0] = 2;
2514 if (sta->tx_supp_rates & WLAN_RATE_2M)
2515 sta->supported_rates[1] = 4;
2516 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2517 sta->supported_rates[2] = 11;
2518 if (sta->tx_supp_rates & WLAN_RATE_11M)
2519 sta->supported_rates[3] = 22;
2520 prism2_check_tx_rates(sta);
2521 atomic_dec(&sta->users);
2526 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2527 struct prism2_hostapd_param *param)
2529 struct sta_info *sta;
2531 spin_lock_bh(&ap->sta_table_lock);
2532 sta = ap_get_sta(ap, param->sta_addr);
2534 ap_sta_hash_del(ap, sta);
2535 list_del(&sta->list);
2537 spin_unlock_bh(&ap->sta_table_lock);
2542 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2543 hostap_event_expired_sta(sta->local->dev, sta);
2544 ap_free_sta(ap, sta);
2550 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2551 struct prism2_hostapd_param *param)
2553 struct sta_info *sta;
2555 spin_lock_bh(&ap->sta_table_lock);
2556 sta = ap_get_sta(ap, param->sta_addr);
2558 atomic_inc(&sta->users);
2559 spin_unlock_bh(&ap->sta_table_lock);
2564 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2566 atomic_dec(&sta->users);
2572 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2573 struct prism2_hostapd_param *param)
2575 struct sta_info *sta;
2577 spin_lock_bh(&ap->sta_table_lock);
2578 sta = ap_get_sta(ap, param->sta_addr);
2580 sta->flags |= param->u.set_flags_sta.flags_or;
2581 sta->flags &= param->u.set_flags_sta.flags_and;
2583 spin_unlock_bh(&ap->sta_table_lock);
2592 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2593 struct prism2_hostapd_param *param)
2595 struct sta_info *sta;
2598 spin_lock_bh(&ap->sta_table_lock);
2599 sta = ap_get_sta(ap, param->sta_addr);
2601 sta->rx_packets = sta->tx_packets = 0;
2602 sta->rx_bytes = sta->tx_bytes = 0;
2603 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2604 sta->tx_count[rate] = 0;
2605 sta->rx_count[rate] = 0;
2608 spin_unlock_bh(&ap->sta_table_lock);
2617 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2619 switch (param->cmd) {
2620 case PRISM2_HOSTAPD_FLUSH:
2621 ap_control_kickall(ap);
2623 case PRISM2_HOSTAPD_ADD_STA:
2624 return prism2_hostapd_add_sta(ap, param);
2625 case PRISM2_HOSTAPD_REMOVE_STA:
2626 return prism2_hostapd_remove_sta(ap, param);
2627 case PRISM2_HOSTAPD_GET_INFO_STA:
2628 return prism2_hostapd_get_info_sta(ap, param);
2629 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2630 return prism2_hostapd_set_flags_sta(ap, param);
2631 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2632 return prism2_hostapd_sta_clear_stats(ap, param);
2634 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2641 /* Update station info for host-based TX rate control and return current
2643 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2645 int ret = sta->tx_rate;
2646 struct hostap_interface *iface;
2647 local_info_t *local;
2649 iface = netdev_priv(dev);
2650 local = iface->local;
2652 sta->tx_count[sta->tx_rate_idx]++;
2653 sta->tx_since_last_failure++;
2654 sta->tx_consecutive_exc = 0;
2655 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2656 sta->tx_rate_idx < sta->tx_max_rate) {
2657 /* use next higher rate */
2658 int old_rate, new_rate;
2659 old_rate = new_rate = sta->tx_rate_idx;
2660 while (new_rate < sta->tx_max_rate) {
2662 if (ap_tx_rate_ok(new_rate, sta, local)) {
2663 sta->tx_rate_idx = new_rate;
2667 if (old_rate != sta->tx_rate_idx) {
2668 switch (sta->tx_rate_idx) {
2669 case 0: sta->tx_rate = 10; break;
2670 case 1: sta->tx_rate = 20; break;
2671 case 2: sta->tx_rate = 55; break;
2672 case 3: sta->tx_rate = 110; break;
2673 default: sta->tx_rate = 0; break;
2675 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2676 " %d\n", dev->name, MAC2STR(sta->addr),
2679 sta->tx_since_last_failure = 0;
2686 /* Called only from software IRQ. Called for each TX frame prior possible
2687 * encryption and transmit. */
2688 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2690 struct sta_info *sta = NULL;
2691 struct sk_buff *skb = tx->skb;
2693 struct ieee80211_hdr_4addr *hdr;
2694 struct hostap_skb_tx_data *meta;
2696 meta = (struct hostap_skb_tx_data *) skb->cb;
2697 ret = AP_TX_CONTINUE;
2698 if (local->ap == NULL || skb->len < 10 ||
2699 meta->iface->type == HOSTAP_INTERFACE_STA)
2702 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2704 if (hdr->addr1[0] & 0x01) {
2705 /* broadcast/multicast frame - no AP related processing */
2709 /* unicast packet - check whether destination STA is associated */
2710 spin_lock(&local->ap->sta_table_lock);
2711 sta = ap_get_sta(local->ap, hdr->addr1);
2713 atomic_inc(&sta->users);
2714 spin_unlock(&local->ap->sta_table_lock);
2716 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2717 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2718 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2719 meta->iface->type != HOSTAP_INTERFACE_AP) {
2721 /* This can happen, e.g., when wlan0 is added to a bridge and
2722 * bridging code does not know which port is the correct target
2723 * for a unicast frame. In this case, the packet is send to all
2724 * ports of the bridge. Since this is a valid scenario, do not
2725 * print out any errors here. */
2726 if (net_ratelimit()) {
2727 printk(KERN_DEBUG "AP: drop packet to non-associated "
2728 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2731 local->ap->tx_drop_nonassoc++;
2739 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2740 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2742 /* Set tx_rate if using host-based TX rate control */
2743 if (!local->fw_tx_rate_control)
2744 local->ap->last_tx_rate = meta->rate =
2745 ap_update_sta_tx_rate(sta, local->dev);
2747 if (local->iw_mode != IW_MODE_MASTER)
2750 if (!(sta->flags & WLAN_STA_PS))
2753 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2754 /* indicate to STA that more frames follow */
2756 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2759 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2760 /* packet was already buffered and now send due to
2761 * PS poll, so do not rebuffer it */
2765 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2766 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2767 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2768 /* Make sure that TIM is set for the station (it might not be
2769 * after AP wlan hw reset). */
2770 /* FIX: should fix hw reset to restore bits based on STA
2772 hostap_set_tim(local, sta->aid, 1);
2773 sta->flags |= WLAN_STA_TIM;
2778 /* STA in PS mode, buffer frame for later delivery */
2779 set_tim = skb_queue_empty(&sta->tx_buf);
2780 skb_queue_tail(&sta->tx_buf, skb);
2781 /* FIX: could save RX time to skb and expire buffered frames after
2782 * some time if STA does not poll for them */
2785 if (sta->flags & WLAN_STA_TIM)
2786 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2788 hostap_set_tim(local, sta->aid, 1);
2789 sta->flags |= WLAN_STA_TIM;
2792 ret = AP_TX_BUFFERED;
2796 if (ret == AP_TX_CONTINUE ||
2797 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2799 sta->tx_bytes += skb->len;
2800 sta->last_tx = jiffies;
2803 if ((ret == AP_TX_CONTINUE ||
2804 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2805 sta->crypt && tx->host_encrypt) {
2806 tx->crypt = sta->crypt;
2807 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2808 * be called to release sta info
2811 atomic_dec(&sta->users);
2818 void hostap_handle_sta_release(void *ptr)
2820 struct sta_info *sta = ptr;
2821 atomic_dec(&sta->users);
2825 /* Called only as a tasklet (software IRQ) */
2826 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2828 struct sta_info *sta;
2829 struct ieee80211_hdr_4addr *hdr;
2830 struct hostap_skb_tx_data *meta;
2832 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2833 meta = (struct hostap_skb_tx_data *) skb->cb;
2835 spin_lock(&local->ap->sta_table_lock);
2836 sta = ap_get_sta(local->ap, hdr->addr1);
2838 spin_unlock(&local->ap->sta_table_lock);
2839 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2840 "TX error (@%lu)\n",
2841 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2845 sta->tx_since_last_failure = 0;
2846 sta->tx_consecutive_exc++;
2848 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2849 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2850 /* use next lower rate */
2852 old = rate = sta->tx_rate_idx;
2855 if (ap_tx_rate_ok(rate, sta, local)) {
2856 sta->tx_rate_idx = rate;
2860 if (old != sta->tx_rate_idx) {
2861 switch (sta->tx_rate_idx) {
2862 case 0: sta->tx_rate = 10; break;
2863 case 1: sta->tx_rate = 20; break;
2864 case 2: sta->tx_rate = 55; break;
2865 case 3: sta->tx_rate = 110; break;
2866 default: sta->tx_rate = 0; break;
2868 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2869 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2872 sta->tx_consecutive_exc = 0;
2874 spin_unlock(&local->ap->sta_table_lock);
2878 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2879 int pwrmgt, int type, int stype)
2881 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2882 sta->flags |= WLAN_STA_PS;
2883 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2884 "mode (type=0x%02X, stype=0x%02X)\n",
2885 MAC2STR(sta->addr), type >> 2, stype >> 4);
2886 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2887 sta->flags &= ~WLAN_STA_PS;
2888 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2889 "PS mode (type=0x%02X, stype=0x%02X)\n",
2890 MAC2STR(sta->addr), type >> 2, stype >> 4);
2891 if (type != IEEE80211_FTYPE_CTL ||
2892 stype != IEEE80211_STYPE_PSPOLL)
2893 schedule_packet_send(local, sta);
2898 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2899 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
2900 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
2902 struct sta_info *sta;
2905 spin_lock(&local->ap->sta_table_lock);
2906 sta = ap_get_sta(local->ap, hdr->addr2);
2908 atomic_inc(&sta->users);
2909 spin_unlock(&local->ap->sta_table_lock);
2914 fc = le16_to_cpu(hdr->frame_ctl);
2915 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2916 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
2918 atomic_dec(&sta->users);
2923 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2924 * getting RX header and payload from hardware. */
2925 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2926 struct sk_buff *skb,
2927 struct hostap_80211_rx_status *rx_stats,
2931 struct sta_info *sta;
2932 u16 fc, type, stype;
2933 struct ieee80211_hdr_4addr *hdr;
2935 if (local->ap == NULL)
2936 return AP_RX_CONTINUE;
2938 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2940 fc = le16_to_cpu(hdr->frame_ctl);
2941 type = WLAN_FC_GET_TYPE(fc);
2942 stype = WLAN_FC_GET_STYPE(fc);
2944 spin_lock(&local->ap->sta_table_lock);
2945 sta = ap_get_sta(local->ap, hdr->addr2);
2947 atomic_inc(&sta->users);
2948 spin_unlock(&local->ap->sta_table_lock);
2950 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2951 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2953 ret = AP_RX_CONTINUE;
2956 if (fc & IEEE80211_FCTL_TODS) {
2957 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2958 if (local->hostapd) {
2959 prism2_rx_80211(local->apdev, skb, rx_stats,
2960 PRISM2_RX_NON_ASSOC);
2961 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2963 printk(KERN_DEBUG "%s: dropped received packet"
2964 " from non-associated STA " MACSTR
2965 " (type=0x%02x, subtype=0x%02x)\n",
2966 dev->name, MAC2STR(hdr->addr2),
2967 type >> 2, stype >> 4);
2968 hostap_rx(dev, skb, rx_stats);
2969 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2974 } else if (fc & IEEE80211_FCTL_FROMDS) {
2976 /* FromDS frame - not for us; probably
2977 * broadcast/multicast in another BSS - drop */
2978 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2979 printk(KERN_DEBUG "Odd.. FromDS packet "
2980 "received with own BSSID\n");
2981 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2986 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2987 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2989 if (local->hostapd) {
2990 prism2_rx_80211(local->apdev, skb, rx_stats,
2991 PRISM2_RX_NON_ASSOC);
2992 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2994 /* At least Lucent f/w seems to send data::nullfunc
2995 * frames with no ToDS flag when the current AP returns
2996 * after being unavailable for some time. Speed up
2997 * re-association by informing the station about it not
2998 * being associated. */
2999 printk(KERN_DEBUG "%s: rejected received nullfunc "
3000 "frame without ToDS from not associated STA "
3002 dev->name, MAC2STR(hdr->addr2));
3003 hostap_rx(dev, skb, rx_stats);
3004 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3008 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3009 /* At least Lucent cards seem to send periodic nullfunc
3010 * frames with ToDS. Let these through to update SQ
3011 * stats and PS state. Nullfunc frames do not contain
3012 * any data and they will be dropped below. */
3014 /* If BSSID (Addr3) is foreign, this frame is a normal
3015 * broadcast frame from an IBSS network. Drop it silently.
3016 * If BSSID is own, report the dropping of this frame. */
3017 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3018 printk(KERN_DEBUG "%s: dropped received packet from "
3019 MACSTR " with no ToDS flag (type=0x%02x, "
3020 "subtype=0x%02x)\n", dev->name,
3021 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
3022 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3029 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3033 sta->rx_bytes += skb->len;
3034 sta->last_rx = jiffies;
3037 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3038 fc & IEEE80211_FCTL_TODS) {
3039 if (local->hostapd) {
3040 prism2_rx_80211(local->apdev, skb, rx_stats,
3041 PRISM2_RX_NULLFUNC_ACK);
3042 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3044 /* some STA f/w's seem to require control::ACK frame
3045 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3046 * from Compaq) does not send this.. Try to generate
3047 * ACK for these frames from the host driver to make
3048 * power saving work with, e.g., Lucent WaveLAN f/w */
3049 hostap_rx(dev, skb, rx_stats);
3050 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3058 atomic_dec(&sta->users);
3064 /* Called only as a tasklet (software IRQ) */
3065 int hostap_handle_sta_crypto(local_info_t *local,
3066 struct ieee80211_hdr_4addr *hdr,
3067 struct ieee80211_crypt_data **crypt,
3070 struct sta_info *sta;
3072 spin_lock(&local->ap->sta_table_lock);
3073 sta = ap_get_sta(local->ap, hdr->addr2);
3075 atomic_inc(&sta->users);
3076 spin_unlock(&local->ap->sta_table_lock);
3082 *crypt = sta->crypt;
3084 /* hostap_handle_sta_release() will be called to release STA
3087 atomic_dec(&sta->users);
3093 /* Called only as a tasklet (software IRQ) */
3094 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3096 struct sta_info *sta;
3099 spin_lock(&ap->sta_table_lock);
3100 sta = ap_get_sta(ap, sta_addr);
3101 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3103 spin_unlock(&ap->sta_table_lock);
3109 /* Called only as a tasklet (software IRQ) */
3110 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3112 struct sta_info *sta;
3115 spin_lock(&ap->sta_table_lock);
3116 sta = ap_get_sta(ap, sta_addr);
3117 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3118 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3119 ap->local->ieee_802_1x == 0))
3121 spin_unlock(&ap->sta_table_lock);
3127 /* Called only as a tasklet (software IRQ) */
3128 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3130 struct sta_info *sta;
3136 spin_lock(&ap->sta_table_lock);
3137 sta = ap_get_sta(ap, sta_addr);
3140 spin_unlock(&ap->sta_table_lock);
3143 sta = ap_add_sta(ap, sta_addr);
3146 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3148 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3149 /* No way of knowing which rates are supported since we did not
3150 * get supported rates element from beacon/assoc req. Assume
3151 * that remote end supports all 802.11b rates. */
3152 sta->supported_rates[0] = 0x82;
3153 sta->supported_rates[1] = 0x84;
3154 sta->supported_rates[2] = 0x0b;
3155 sta->supported_rates[3] = 0x16;
3156 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3157 WLAN_RATE_5M5 | WLAN_RATE_11M;
3159 sta->tx_max_rate = sta->tx_rate_idx = 3;
3166 /* Called only as a tasklet (software IRQ) */
3167 int hostap_update_rx_stats(struct ap_data *ap,
3168 struct ieee80211_hdr_4addr *hdr,
3169 struct hostap_80211_rx_status *rx_stats)
3171 struct sta_info *sta;
3176 spin_lock(&ap->sta_table_lock);
3177 sta = ap_get_sta(ap, hdr->addr2);
3179 sta->last_rx_silence = rx_stats->noise;
3180 sta->last_rx_signal = rx_stats->signal;
3181 sta->last_rx_rate = rx_stats->rate;
3182 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3183 if (rx_stats->rate == 10)
3185 else if (rx_stats->rate == 20)
3187 else if (rx_stats->rate == 55)
3189 else if (rx_stats->rate == 110)
3192 spin_unlock(&ap->sta_table_lock);
3194 return sta ? 0 : -1;
3198 void hostap_update_rates(local_info_t *local)
3200 struct list_head *ptr;
3201 struct ap_data *ap = local->ap;
3206 spin_lock_bh(&ap->sta_table_lock);
3207 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3208 struct sta_info *sta = (struct sta_info *) ptr;
3209 prism2_check_tx_rates(sta);
3211 spin_unlock_bh(&ap->sta_table_lock);
3215 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3216 struct ieee80211_crypt_data ***crypt)
3218 struct sta_info *sta;
3220 spin_lock_bh(&ap->sta_table_lock);
3221 sta = ap_get_sta(ap, addr);
3223 atomic_inc(&sta->users);
3224 spin_unlock_bh(&ap->sta_table_lock);
3226 if (!sta && permanent)
3227 sta = ap_add_sta(ap, addr);
3233 sta->flags |= WLAN_STA_PERM;
3235 *crypt = &sta->crypt;
3241 void hostap_add_wds_links(local_info_t *local)
3243 struct ap_data *ap = local->ap;
3244 struct list_head *ptr;
3246 spin_lock_bh(&ap->sta_table_lock);
3247 list_for_each(ptr, &ap->sta_list) {
3248 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3250 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3252 spin_unlock_bh(&ap->sta_table_lock);
3254 schedule_work(&local->ap->wds_oper_queue);
3258 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3260 struct wds_oper_data *entry;
3262 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3265 memcpy(entry->addr, addr, ETH_ALEN);
3267 spin_lock_bh(&local->lock);
3268 entry->next = local->ap->wds_oper_entries;
3269 local->ap->wds_oper_entries = entry;
3270 spin_unlock_bh(&local->lock);
3272 schedule_work(&local->ap->wds_oper_queue);
3276 EXPORT_SYMBOL(hostap_init_data);
3277 EXPORT_SYMBOL(hostap_init_ap_proc);
3278 EXPORT_SYMBOL(hostap_free_data);
3279 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3280 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3281 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3282 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */