| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jouni Malinen | 15465 | 93.33% | 5 | 10.42% |
| David Howells | 476 | 2.87% | 2 | 4.17% |
| David S. Miller | 143 | 0.86% | 2 | 4.17% |
| Dan J Williams | 119 | 0.72% | 1 | 2.08% |
| Johannes Berg | 59 | 0.36% | 3 | 6.25% |
| Christoph Hellwig | 56 | 0.34% | 2 | 4.17% |
| Al Viro | 43 | 0.26% | 1 | 2.08% |
| Matthias Kaehlcke | 29 | 0.18% | 1 | 2.08% |
| Ding Tianhong | 22 | 0.13% | 1 | 2.08% |
| Adrian Bunk | 20 | 0.12% | 2 | 4.17% |
| Tejun Heo | 19 | 0.11% | 3 | 6.25% |
| Pavel Roskin | 17 | 0.10% | 2 | 4.17% |
| Kees Cook | 17 | 0.10% | 2 | 4.17% |
| Joe Perches | 16 | 0.10% | 2 | 4.17% |
| Yue haibing | 16 | 0.10% | 1 | 2.08% |
| Arnaldo Carvalho de Melo | 11 | 0.07% | 3 | 6.25% |
| Song Muchun | 8 | 0.05% | 1 | 2.08% |
| John W. Linville | 7 | 0.04% | 1 | 2.08% |
| Paul Gortmaker | 6 | 0.04% | 2 | 4.17% |
| Jean Tourrilhes | 5 | 0.03% | 1 | 2.08% |
| James Ketrenos | 4 | 0.02% | 1 | 2.08% |
| Harvey Harrison | 4 | 0.02% | 1 | 2.08% |
| Stephen Hemminger | 1 | 0.01% | 1 | 2.08% |
| Kumar Amit Mehta | 1 | 0.01% | 1 | 2.08% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 2.08% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 2.08% |
| Lucas De Marchi | 1 | 0.01% | 1 | 2.08% |
| Yan Burman | 1 | 0.01% | 1 | 2.08% |
| Kirill V Tkhai | 1 | 0.01% | 1 | 2.08% |
| Lee Jones | 1 | 0.01% | 1 | 2.08% |
| Total | 16570 | 48 |
// SPDX-License-Identifier: GPL-2.0 /* * Intersil Prism2 driver with Host AP (software access point) support * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen * <j@w1.fi> * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi> * * This file is to be included into hostap.c when S/W AP functionality is * compiled. * * AP: FIX: * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from * unauthenticated STA, send deauth. frame (8802.11: 5.5) * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5) * - if unicast Class 3 received from unauthenticated STA, send deauth. frame * (8802.11: 5.5) */ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/delay.h> #include <linux/random.h> #include <linux/if_arp.h> #include <linux/slab.h> #include <linux/export.h> #include <linux/moduleparam.h> #include <linux/etherdevice.h> #include "hostap_wlan.h" #include "hostap.h" #include "hostap_ap.h" static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL, DEF_INTS }; module_param_array(other_ap_policy, int, NULL, 0444); MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)"); static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC, DEF_INTS }; module_param_array(ap_max_inactivity, int, NULL, 0444); MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station " "inactivity"); static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS }; module_param_array(ap_bridge_packets, int, NULL, 0444); MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between " "stations"); static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS }; module_param_array(autom_ap_wds, int, NULL, 0444); MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs " "automatically"); static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta); static void hostap_event_expired_sta(struct net_device *dev, struct sta_info *sta); static void handle_add_proc_queue(struct work_struct *work); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT static void handle_wds_oper_queue(struct work_struct *work); static void prism2_send_mgmt(struct net_device *dev, u16 type_subtype, char *body, int body_len, u8 *addr, u16 tx_cb_idx); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS) static int ap_debug_proc_show(struct seq_file *m, void *v) { struct ap_data *ap = pde_data(file_inode(m->file)); seq_printf(m, "BridgedUnicastFrames=%u\n", ap->bridged_unicast); seq_printf(m, "BridgedMulticastFrames=%u\n", ap->bridged_multicast); seq_printf(m, "max_inactivity=%u\n", ap->max_inactivity / HZ); seq_printf(m, "bridge_packets=%u\n", ap->bridge_packets); seq_printf(m, "nullfunc_ack=%u\n", ap->nullfunc_ack); seq_printf(m, "autom_ap_wds=%u\n", ap->autom_ap_wds); seq_printf(m, "auth_algs=%u\n", ap->local->auth_algs); seq_printf(m, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc); return 0; } #endif static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta) { sta->hnext = ap->sta_hash[STA_HASH(sta->addr)]; ap->sta_hash[STA_HASH(sta->addr)] = sta; } static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta) { struct sta_info *s; s = ap->sta_hash[STA_HASH(sta->addr)]; if (s == NULL) return; if (ether_addr_equal(s->addr, sta->addr)) { ap->sta_hash[STA_HASH(sta->addr)] = s->hnext; return; } while (s->hnext != NULL && !ether_addr_equal(s->hnext->addr, sta->addr)) s = s->hnext; if (s->hnext != NULL) s->hnext = s->hnext->hnext; else printk("AP: could not remove STA %pM from hash table\n", sta->addr); } static void ap_free_sta(struct ap_data *ap, struct sta_info *sta) { if (sta->ap && sta->local) hostap_event_expired_sta(sta->local->dev, sta); if (ap->proc != NULL) { char name[20]; sprintf(name, "%pM", sta->addr); remove_proc_entry(name, ap->proc); } if (sta->crypt) { sta->crypt->ops->deinit(sta->crypt->priv); kfree(sta->crypt); sta->crypt = NULL; } skb_queue_purge(&sta->tx_buf); ap->num_sta--; #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (sta->aid > 0) ap->sta_aid[sta->aid - 1] = NULL; if (!sta->ap) kfree(sta->u.sta.challenge); del_timer_sync(&sta->timer); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ kfree(sta); } static void hostap_set_tim(local_info_t *local, int aid, int set) { if (local->func->set_tim) local->func->set_tim(local->dev, aid, set); } static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta) { union iwreq_data wrqu; memset(&wrqu, 0, sizeof(wrqu)); memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN); wrqu.addr.sa_family = ARPHRD_ETHER; wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL); } static void hostap_event_expired_sta(struct net_device *dev, struct sta_info *sta) { union iwreq_data wrqu; memset(&wrqu, 0, sizeof(wrqu)); memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN); wrqu.addr.sa_family = ARPHRD_ETHER; wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL); } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT static void ap_handle_timer(struct timer_list *t) { struct sta_info *sta = from_timer(sta, t, timer); local_info_t *local; struct ap_data *ap; unsigned long next_time = 0; int was_assoc; if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) { PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n"); return; } local = sta->local; ap = local->ap; was_assoc = sta->flags & WLAN_STA_ASSOC; if (atomic_read(&sta->users) != 0) next_time = jiffies + HZ; else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH)) next_time = jiffies + ap->max_inactivity; if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) { /* station activity detected; reset timeout state */ sta->timeout_next = STA_NULLFUNC; next_time = sta->last_rx + ap->max_inactivity; } else if (sta->timeout_next == STA_DISASSOC && !(sta->flags & WLAN_STA_PENDING_POLL)) { /* STA ACKed data nullfunc frame poll */ sta->timeout_next = STA_NULLFUNC; next_time = jiffies + ap->max_inactivity; } if (next_time) { sta->timer.expires = next_time; add_timer(&sta->timer); return; } if (sta->ap) sta->timeout_next = STA_DEAUTH; if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) { spin_lock(&ap->sta_table_lock); ap_sta_hash_del(ap, sta); list_del(&sta->list); spin_unlock(&ap->sta_table_lock); sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC); } else if (sta->timeout_next == STA_DISASSOC) sta->flags &= ~WLAN_STA_ASSOC; if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap) hostap_event_expired_sta(local->dev, sta); if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 && !skb_queue_empty(&sta->tx_buf)) { hostap_set_tim(local, sta->aid, 0); sta->flags &= ~WLAN_STA_TIM; } if (sta->ap) { if (ap->autom_ap_wds) { PDEBUG(DEBUG_AP, "%s: removing automatic WDS " "connection to AP %pM\n", local->dev->name, sta->addr); hostap_wds_link_oper(local, sta->addr, WDS_DEL); } } else if (sta->timeout_next == STA_NULLFUNC) { /* send data frame to poll STA and check whether this frame * is ACKed */ /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but * it is apparently not retried so TX Exc events are not * received for it */ sta->flags |= WLAN_STA_PENDING_POLL; prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA, NULL, 0, sta->addr, ap->tx_callback_poll); } else { int deauth = sta->timeout_next == STA_DEAUTH; __le16 resp; PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM" "(last=%lu, jiffies=%lu)\n", local->dev->name, deauth ? "deauthentication" : "disassociation", sta->addr, sta->last_rx, jiffies); resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID : WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT | (deauth ? IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC), (char *) &resp, 2, sta->addr, 0); } if (sta->timeout_next == STA_DEAUTH) { if (sta->flags & WLAN_STA_PERM) { PDEBUG(DEBUG_AP, "%s: STA %pM" " would have been removed, " "but it has 'perm' flag\n", local->dev->name, sta->addr); } else ap_free_sta(ap, sta); return; } if (sta->timeout_next == STA_NULLFUNC) { sta->timeout_next = STA_DISASSOC; sta->timer.expires = jiffies + AP_DISASSOC_DELAY; } else { sta->timeout_next = STA_DEAUTH; sta->timer.expires = jiffies + AP_DEAUTH_DELAY; } add_timer(&sta->timer); } void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap, int resend) { u8 addr[ETH_ALEN]; __le16 resp; int i; PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name); eth_broadcast_addr(addr); resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID); /* deauth message sent; try to resend it few times; the message is * broadcast, so it may be delayed until next DTIM; there is not much * else we can do at this point since the driver is going to be shut * down */ for (i = 0; i < 5; i++) { prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH, (char *) &resp, 2, addr, 0); if (!resend || ap->num_sta <= 0) return; mdelay(50); } } static int ap_control_proc_show(struct seq_file *m, void *v) { struct ap_data *ap = pde_data(file_inode(m->file)); char *policy_txt; struct mac_entry *entry; if (v == SEQ_START_TOKEN) { switch (ap->mac_restrictions.policy) { case MAC_POLICY_OPEN: policy_txt = "open"; break; case MAC_POLICY_ALLOW: policy_txt = "allow"; break; case MAC_POLICY_DENY: policy_txt = "deny"; break; default: policy_txt = "unknown"; break; } seq_printf(m, "MAC policy: %s\n", policy_txt); seq_printf(m, "MAC entries: %u\n", ap->mac_restrictions.entries); seq_puts(m, "MAC list:\n"); return 0; } entry = v; seq_printf(m, "%pM\n", entry->addr); return 0; } static void *ap_control_proc_start(struct seq_file *m, loff_t *_pos) { struct ap_data *ap = pde_data(file_inode(m->file)); spin_lock_bh(&ap->mac_restrictions.lock); return seq_list_start_head(&ap->mac_restrictions.mac_list, *_pos); } static void *ap_control_proc_next(struct seq_file *m, void *v, loff_t *_pos) { struct ap_data *ap = pde_data(file_inode(m->file)); return seq_list_next(v, &ap->mac_restrictions.mac_list, _pos); } static void ap_control_proc_stop(struct seq_file *m, void *v) { struct ap_data *ap = pde_data(file_inode(m->file)); spin_unlock_bh(&ap->mac_restrictions.lock); } static const struct seq_operations ap_control_proc_seqops = { .start = ap_control_proc_start, .next = ap_control_proc_next, .stop = ap_control_proc_stop, .show = ap_control_proc_show, }; int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac) { struct mac_entry *entry; entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL); if (entry == NULL) return -ENOMEM; memcpy(entry->addr, mac, ETH_ALEN); spin_lock_bh(&mac_restrictions->lock); list_add_tail(&entry->list, &mac_restrictions->mac_list); mac_restrictions->entries++; spin_unlock_bh(&mac_restrictions->lock); return 0; } int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac) { struct list_head *ptr; struct mac_entry *entry; spin_lock_bh(&mac_restrictions->lock); for (ptr = mac_restrictions->mac_list.next; ptr != &mac_restrictions->mac_list; ptr = ptr->next) { entry = list_entry(ptr, struct mac_entry, list); if (ether_addr_equal(entry->addr, mac)) { list_del(ptr); kfree(entry); mac_restrictions->entries--; spin_unlock_bh(&mac_restrictions->lock); return 0; } } spin_unlock_bh(&mac_restrictions->lock); return -1; } static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions, u8 *mac) { struct mac_entry *entry; int found = 0; if (mac_restrictions->policy == MAC_POLICY_OPEN) return 0; spin_lock_bh(&mac_restrictions->lock); list_for_each_entry(entry, &mac_restrictions->mac_list, list) { if (ether_addr_equal(entry->addr, mac)) { found = 1; break; } } spin_unlock_bh(&mac_restrictions->lock); if (mac_restrictions->policy == MAC_POLICY_ALLOW) return !found; else return found; } void ap_control_flush_macs(struct mac_restrictions *mac_restrictions) { struct list_head *ptr, *n; struct mac_entry *entry; if (mac_restrictions->entries == 0) return; spin_lock_bh(&mac_restrictions->lock); for (ptr = mac_restrictions->mac_list.next, n = ptr->next; ptr != &mac_restrictions->mac_list; ptr = n, n = ptr->next) { entry = list_entry(ptr, struct mac_entry, list); list_del(ptr); kfree(entry); } mac_restrictions->entries = 0; spin_unlock_bh(&mac_restrictions->lock); } int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac) { struct sta_info *sta; __le16 resp; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, mac); if (sta) { ap_sta_hash_del(ap, sta); list_del(&sta->list); } spin_unlock_bh(&ap->sta_table_lock); if (!sta) return -EINVAL; resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID); prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH, (char *) &resp, 2, sta->addr, 0); if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap) hostap_event_expired_sta(dev, sta); ap_free_sta(ap, sta); return 0; } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ void ap_control_kickall(struct ap_data *ap) { struct list_head *ptr, *n; struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list; ptr = n, n = ptr->next) { sta = list_entry(ptr, struct sta_info, list); ap_sta_hash_del(ap, sta); list_del(&sta->list); if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local) hostap_event_expired_sta(sta->local->dev, sta); ap_free_sta(ap, sta); } spin_unlock_bh(&ap->sta_table_lock); } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT static int prism2_ap_proc_show(struct seq_file *m, void *v) { struct sta_info *sta = v; int i; if (v == SEQ_START_TOKEN) { seq_printf(m, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n"); return 0; } if (!sta->ap) return 0; seq_printf(m, "%pM %d %d %d %d '", sta->addr, sta->u.ap.channel, sta->last_rx_signal, sta->last_rx_silence, sta->last_rx_rate); for (i = 0; i < sta->u.ap.ssid_len; i++) { if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127) seq_putc(m, sta->u.ap.ssid[i]); else seq_printf(m, "<%02x>", sta->u.ap.ssid[i]); } seq_putc(m, '\''); if (sta->capability & WLAN_CAPABILITY_ESS) seq_puts(m, " [ESS]"); if (sta->capability & WLAN_CAPABILITY_IBSS) seq_puts(m, " [IBSS]"); if (sta->capability & WLAN_CAPABILITY_PRIVACY) seq_puts(m, " [WEP]"); seq_putc(m, '\n'); return 0; } static void *prism2_ap_proc_start(struct seq_file *m, loff_t *_pos) { struct ap_data *ap = pde_data(file_inode(m->file)); spin_lock_bh(&ap->sta_table_lock); return seq_list_start_head(&ap->sta_list, *_pos); } static void *prism2_ap_proc_next(struct seq_file *m, void *v, loff_t *_pos) { struct ap_data *ap = pde_data(file_inode(m->file)); return seq_list_next(v, &ap->sta_list, _pos); } static void prism2_ap_proc_stop(struct seq_file *m, void *v) { struct ap_data *ap = pde_data(file_inode(m->file)); spin_unlock_bh(&ap->sta_table_lock); } static const struct seq_operations prism2_ap_proc_seqops = { .start = prism2_ap_proc_start, .next = prism2_ap_proc_next, .stop = prism2_ap_proc_stop, .show = prism2_ap_proc_show, }; #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver) { if (!ap) return; if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) { PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - " "firmware upgrade recommended\n"); ap->nullfunc_ack = 1; } else ap->nullfunc_ack = 0; if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) { printk(KERN_WARNING "%s: Warning: secondary station firmware " "version 1.4.2 does not seem to work in Host AP mode\n", ap->local->dev->name); } } /* Called only as a tasklet (software IRQ) */ static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data) { struct ap_data *ap = data; struct ieee80211_hdr *hdr; if (!ap->local->hostapd || !ap->local->apdev) { dev_kfree_skb(skb); return; } /* Pass the TX callback frame to the hostapd; use 802.11 header version * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */ hdr = (struct ieee80211_hdr *) skb->data; hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS); hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0)); skb->dev = ap->local->apdev; skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control)); skb->pkt_type = PACKET_OTHERHOST; skb->protocol = cpu_to_be16(ETH_P_802_2); memset(skb->cb, 0, sizeof(skb->cb)); netif_rx(skb); } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT /* Called only as a tasklet (software IRQ) */ static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data) { struct ap_data *ap = data; struct net_device *dev = ap->local->dev; struct ieee80211_hdr *hdr; u16 auth_alg, auth_transaction, status; __le16 *pos; struct sta_info *sta = NULL; char *txt = NULL; if (ap->local->hostapd) { dev_kfree_skb(skb); return; } hdr = (struct ieee80211_hdr *) skb->data; if (!ieee80211_is_auth(hdr->frame_control) || skb->len < IEEE80211_MGMT_HDR_LEN + 6) { printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid " "frame\n", dev->name); dev_kfree_skb(skb); return; } pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN); auth_alg = le16_to_cpu(*pos++); auth_transaction = le16_to_cpu(*pos++); status = le16_to_cpu(*pos++); if (!ok) { txt = "frame was not ACKed"; goto done; } spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, hdr->addr1); if (sta) atomic_inc(&sta->users); spin_unlock(&ap->sta_table_lock); if (!sta) { txt = "STA not found"; goto done; } if (status == WLAN_STATUS_SUCCESS && ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { txt = "STA authenticated"; sta->flags |= WLAN_STA_AUTH; sta->last_auth = jiffies; } else if (status != WLAN_STATUS_SUCCESS) txt = "authentication failed"; done: if (sta) atomic_dec(&sta->users); if (txt) { PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d " "trans#=%d status=%d - %s\n", dev->name, hdr->addr1, auth_alg, auth_transaction, status, txt); } dev_kfree_skb(skb); } /* Called only as a tasklet (software IRQ) */ static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data) { struct ap_data *ap = data; struct net_device *dev = ap->local->dev; struct ieee80211_hdr *hdr; u16 status; __le16 *pos; struct sta_info *sta = NULL; char *txt = NULL; if (ap->local->hostapd) { dev_kfree_skb(skb); return; } hdr = (struct ieee80211_hdr *) skb->data; if ((!ieee80211_is_assoc_resp(hdr->frame_control) && !ieee80211_is_reassoc_resp(hdr->frame_control)) || skb->len < IEEE80211_MGMT_HDR_LEN + 4) { printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid " "frame\n", dev->name); dev_kfree_skb(skb); return; } if (!ok) { txt = "frame was not ACKed"; goto done; } spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, hdr->addr1); if (sta) atomic_inc(&sta->users); spin_unlock(&ap->sta_table_lock); if (!sta) { txt = "STA not found"; goto done; } pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN); pos++; status = le16_to_cpu(*pos++); if (status == WLAN_STATUS_SUCCESS) { if (!(sta->flags & WLAN_STA_ASSOC)) hostap_event_new_sta(dev, sta); txt = "STA associated"; sta->flags |= WLAN_STA_ASSOC; sta->last_assoc = jiffies; } else txt = "association failed"; done: if (sta) atomic_dec(&sta->users); if (txt) { PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n", dev->name, hdr->addr1, txt); } dev_kfree_skb(skb); } /* Called only as a tasklet (software IRQ); TX callback for poll frames used * in verifying whether the STA is still present. */ static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data) { struct ap_data *ap = data; struct ieee80211_hdr *hdr; struct sta_info *sta; if (skb->len < 24) goto fail; hdr = (struct ieee80211_hdr *) skb->data; if (ok) { spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, hdr->addr1); if (sta) sta->flags &= ~WLAN_STA_PENDING_POLL; spin_unlock(&ap->sta_table_lock); } else { PDEBUG(DEBUG_AP, "%s: STA %pM did not ACK activity poll frame\n", ap->local->dev->name, hdr->addr1); } fail: dev_kfree_skb(skb); } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ void hostap_init_data(local_info_t *local) { struct ap_data *ap = local->ap; if (ap == NULL) { printk(KERN_WARNING "hostap_init_data: ap == NULL\n"); return; } memset(ap, 0, sizeof(struct ap_data)); ap->local = local; ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx); ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx); ap->max_inactivity = GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ; ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx); spin_lock_init(&ap->sta_table_lock); INIT_LIST_HEAD(&ap->sta_list); /* Initialize task queue structure for AP management */ INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue); ap->tx_callback_idx = hostap_tx_callback_register(local, hostap_ap_tx_cb, ap); if (ap->tx_callback_idx == 0) printk(KERN_WARNING "%s: failed to register TX callback for " "AP\n", local->dev->name); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue); ap->tx_callback_auth = hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap); ap->tx_callback_assoc = hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap); ap->tx_callback_poll = hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap); if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 || ap->tx_callback_poll == 0) printk(KERN_WARNING "%s: failed to register TX callback for " "AP\n", local->dev->name); spin_lock_init(&ap->mac_restrictions.lock); INIT_LIST_HEAD(&ap->mac_restrictions.mac_list); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ ap->initialized = 1; } void hostap_init_ap_proc(local_info_t *local) { struct ap_data *ap = local->ap; ap->proc = local->proc; if (ap->proc == NULL) return; #ifndef PRISM2_NO_PROCFS_DEBUG proc_create_single_data("ap_debug", 0, ap->proc, ap_debug_proc_show, ap); #endif /* PRISM2_NO_PROCFS_DEBUG */ #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT proc_create_seq_data("ap_control", 0, ap->proc, &ap_control_proc_seqops, ap); proc_create_seq_data("ap", 0, ap->proc, &prism2_ap_proc_seqops, ap); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ } void hostap_free_data(struct ap_data *ap) { struct sta_info *n, *sta; if (ap == NULL || !ap->initialized) { printk(KERN_DEBUG "hostap_free_data: ap has not yet been " "initialized - skip resource freeing\n"); return; } flush_work(&ap->add_sta_proc_queue); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT flush_work(&ap->wds_oper_queue); if (ap->crypt) ap->crypt->deinit(ap->crypt_priv); ap->crypt = ap->crypt_priv = NULL; #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ list_for_each_entry_safe(sta, n, &ap->sta_list, list) { ap_sta_hash_del(ap, sta); list_del(&sta->list); if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local) hostap_event_expired_sta(sta->local->dev, sta); ap_free_sta(ap, sta); } #ifndef PRISM2_NO_PROCFS_DEBUG if (ap->proc != NULL) { remove_proc_entry("ap_debug", ap->proc); } #endif /* PRISM2_NO_PROCFS_DEBUG */ #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (ap->proc != NULL) { remove_proc_entry("ap", ap->proc); remove_proc_entry("ap_control", ap->proc); } ap_control_flush_macs(&ap->mac_restrictions); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ ap->initialized = 0; } /* caller should have mutex for AP STA list handling */ static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta) { struct sta_info *s; s = ap->sta_hash[STA_HASH(sta)]; while (s != NULL && !ether_addr_equal(s->addr, sta)) s = s->hnext; return s; } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT /* Called from timer handler and from scheduled AP queue handlers */ static void prism2_send_mgmt(struct net_device *dev, u16 type_subtype, char *body, int body_len, u8 *addr, u16 tx_cb_idx) { struct hostap_interface *iface; local_info_t *local; struct ieee80211_hdr *hdr; u16 fc; struct sk_buff *skb; struct hostap_skb_tx_data *meta; int hdrlen; iface = netdev_priv(dev); local = iface->local; dev = local->dev; /* always use master radio device */ iface = netdev_priv(dev); if (!(dev->flags & IFF_UP)) { PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - " "cannot send frame\n", dev->name); return; } skb = dev_alloc_skb(sizeof(*hdr) + body_len); if (skb == NULL) { PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate " "skb\n", dev->name); return; } fc = type_subtype; hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype)); hdr = skb_put_zero(skb, hdrlen); if (body) skb_put_data(skb, body, body_len); /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11 * tx_control instead of using local->tx_control */ memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */ if (ieee80211_is_data(hdr->frame_control)) { fc |= IEEE80211_FCTL_FROMDS; memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */ memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */ } else if (ieee80211_is_ctl(hdr->frame_control)) { /* control:ACK does not have addr2 or addr3 */ eth_zero_addr(hdr->addr2); eth_zero_addr(hdr->addr3); } else { memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */ memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */ } hdr->frame_control = cpu_to_le16(fc); meta = (struct hostap_skb_tx_data *) skb->cb; memset(meta, 0, sizeof(*meta)); meta->magic = HOSTAP_SKB_TX_DATA_MAGIC; meta->iface = iface; meta->tx_cb_idx = tx_cb_idx; skb->dev = dev; skb_reset_mac_header(skb); skb_reset_network_header(skb); dev_queue_xmit(skb); } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ #ifdef CONFIG_PROC_FS static int prism2_sta_proc_show(struct seq_file *m, void *v) { struct sta_info *sta = m->private; int i; /* FIX: possible race condition.. the STA data could have just expired, * but proc entry was still here so that the read could have started; * some locking should be done here.. */ seq_printf(m, "%s=%pM\nusers=%d\naid=%d\n" "flags=0x%04x%s%s%s%s%s%s%s\n" "capability=0x%02x\nlisten_interval=%d\nsupported_rates=", sta->ap ? "AP" : "STA", sta->addr, atomic_read(&sta->users), sta->aid, sta->flags, sta->flags & WLAN_STA_AUTH ? " AUTH" : "", sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "", sta->flags & WLAN_STA_PS ? " PS" : "", sta->flags & WLAN_STA_TIM ? " TIM" : "", sta->flags & WLAN_STA_PERM ? " PERM" : "", sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "", sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "", sta->capability, sta->listen_interval); /* supported_rates: 500 kbit/s units with msb ignored */ for (i = 0; i < sizeof(sta->supported_rates); i++) if (sta->supported_rates[i] != 0) seq_printf(m, "%d%sMbps ", (sta->supported_rates[i] & 0x7f) / 2, sta->supported_rates[i] & 1 ? ".5" : ""); seq_printf(m, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n" "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n" "tx_packets=%lu\n" "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n" "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n" "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n" "tx[11M]=%d\n" "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n", jiffies, sta->last_auth, sta->last_assoc, sta->last_rx, sta->last_tx, sta->rx_packets, sta->tx_packets, sta->rx_bytes, sta->tx_bytes, skb_queue_len(&sta->tx_buf), sta->last_rx_silence, sta->last_rx_signal, sta->last_rx_rate / 10, sta->last_rx_rate % 10 ? ".5" : "", sta->tx_rate, sta->tx_count[0], sta->tx_count[1], sta->tx_count[2], sta->tx_count[3], sta->rx_count[0], sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]); if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats) sta->crypt->ops->print_stats(m, sta->crypt->priv); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (sta->ap) { if (sta->u.ap.channel >= 0) seq_printf(m, "channel=%d\n", sta->u.ap.channel); seq_puts(m, "ssid="); for (i = 0; i < sta->u.ap.ssid_len; i++) { if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127) seq_putc(m, sta->u.ap.ssid[i]); else seq_printf(m, "<%02x>", sta->u.ap.ssid[i]); } seq_putc(m, '\n'); } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ return 0; } #endif static void handle_add_proc_queue(struct work_struct *work) { struct ap_data *ap = container_of(work, struct ap_data, add_sta_proc_queue); struct sta_info *sta; char name[20]; struct add_sta_proc_data *entry, *prev; entry = ap->add_sta_proc_entries; ap->add_sta_proc_entries = NULL; while (entry) { spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, entry->addr); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&ap->sta_table_lock); if (sta) { sprintf(name, "%pM", sta->addr); sta->proc = proc_create_single_data( name, 0, ap->proc, prism2_sta_proc_show, sta); atomic_dec(&sta->users); } prev = entry; entry = entry->next; kfree(prev); } } static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr) { struct sta_info *sta; sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC); if (sta == NULL) { PDEBUG(DEBUG_AP, "AP: kmalloc failed\n"); return NULL; } /* initialize STA info data */ sta->local = ap->local; skb_queue_head_init(&sta->tx_buf); memcpy(sta->addr, addr, ETH_ALEN); atomic_inc(&sta->users); spin_lock_bh(&ap->sta_table_lock); list_add(&sta->list, &ap->sta_list); ap->num_sta++; ap_sta_hash_add(ap, sta); spin_unlock_bh(&ap->sta_table_lock); if (ap->proc) { struct add_sta_proc_data *entry; /* schedule a non-interrupt context process to add a procfs * entry for the STA since procfs code use GFP_KERNEL */ entry = kmalloc(sizeof(*entry), GFP_ATOMIC); if (entry) { memcpy(entry->addr, sta->addr, ETH_ALEN); entry->next = ap->add_sta_proc_entries; ap->add_sta_proc_entries = entry; schedule_work(&ap->add_sta_proc_queue); } else printk(KERN_DEBUG "Failed to add STA proc data\n"); } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT timer_setup(&sta->timer, ap_handle_timer, 0); sta->timer.expires = jiffies + ap->max_inactivity; if (!ap->local->hostapd) add_timer(&sta->timer); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ return sta; } static int ap_tx_rate_ok(int rateidx, struct sta_info *sta, local_info_t *local) { if (rateidx > sta->tx_max_rate || !(sta->tx_supp_rates & (1 << rateidx))) return 0; if (local->tx_rate_control != 0 && !(local->tx_rate_control & (1 << rateidx))) return 0; return 1; } static void prism2_check_tx_rates(struct sta_info *sta) { int i; sta->tx_supp_rates = 0; for (i = 0; i < sizeof(sta->supported_rates); i++) { if ((sta->supported_rates[i] & 0x7f) == 2) sta->tx_supp_rates |= WLAN_RATE_1M; if ((sta->supported_rates[i] & 0x7f) == 4) sta->tx_supp_rates |= WLAN_RATE_2M; if ((sta->supported_rates[i] & 0x7f) == 11) sta->tx_supp_rates |= WLAN_RATE_5M5; if ((sta->supported_rates[i] & 0x7f) == 22) sta->tx_supp_rates |= WLAN_RATE_11M; } sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0; if (sta->tx_supp_rates & WLAN_RATE_1M) { sta->tx_max_rate = 0; if (ap_tx_rate_ok(0, sta, sta->local)) { sta->tx_rate = 10; sta->tx_rate_idx = 0; } } if (sta->tx_supp_rates & WLAN_RATE_2M) { sta->tx_max_rate = 1; if (ap_tx_rate_ok(1, sta, sta->local)) { sta->tx_rate = 20; sta->tx_rate_idx = 1; } } if (sta->tx_supp_rates & WLAN_RATE_5M5) { sta->tx_max_rate = 2; if (ap_tx_rate_ok(2, sta, sta->local)) { sta->tx_rate = 55; sta->tx_rate_idx = 2; } } if (sta->tx_supp_rates & WLAN_RATE_11M) { sta->tx_max_rate = 3; if (ap_tx_rate_ok(3, sta, sta->local)) { sta->tx_rate = 110; sta->tx_rate_idx = 3; } } } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT static void ap_crypt_init(struct ap_data *ap) { ap->crypt = lib80211_get_crypto_ops("WEP"); if (ap->crypt) { if (ap->crypt->init) { ap->crypt_priv = ap->crypt->init(0); if (ap->crypt_priv == NULL) ap->crypt = NULL; else { u8 key[WEP_KEY_LEN]; get_random_bytes(key, WEP_KEY_LEN); ap->crypt->set_key(key, WEP_KEY_LEN, NULL, ap->crypt_priv); } } } if (ap->crypt == NULL) { printk(KERN_WARNING "AP could not initialize WEP: load module " "lib80211_crypt_wep.ko\n"); } } /* Generate challenge data for shared key authentication. IEEE 802.11 specifies * that WEP algorithm is used for generating challenge. This should be unique, * but otherwise there is not really need for randomness etc. Initialize WEP * with pseudo random key and then use increasing IV to get unique challenge * streams. * * Called only as a scheduled task for pending AP frames. */ static char * ap_auth_make_challenge(struct ap_data *ap) { char *tmpbuf; struct sk_buff *skb; if (ap->crypt == NULL) { ap_crypt_init(ap); if (ap->crypt == NULL) return NULL; } tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC); if (tmpbuf == NULL) { PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n"); return NULL; } skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN + ap->crypt->extra_mpdu_prefix_len + ap->crypt->extra_mpdu_postfix_len); if (skb == NULL) { kfree(tmpbuf); return NULL; } skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len); skb_put_zero(skb, WLAN_AUTH_CHALLENGE_LEN); if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) { dev_kfree_skb(skb); kfree(tmpbuf); return NULL; } skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len, tmpbuf, WLAN_AUTH_CHALLENGE_LEN); dev_kfree_skb(skb); return tmpbuf; } /* Called only as a scheduled task for pending AP frames. */ static void handle_authen(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { struct net_device *dev = local->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; size_t hdrlen; struct ap_data *ap = local->ap; char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL; int len, olen; u16 auth_alg, auth_transaction, status_code; __le16 *pos; u16 resp = WLAN_STATUS_SUCCESS; struct sta_info *sta = NULL; struct lib80211_crypt_data *crypt; char *txt = ""; len = skb->len - IEEE80211_MGMT_HDR_LEN; hdrlen = hostap_80211_get_hdrlen(hdr->frame_control); if (len < 6) { PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload " "(len=%d) from %pM\n", dev->name, len, hdr->addr2); return; } spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&local->ap->sta_table_lock); if (sta && sta->crypt) crypt = sta->crypt; else { int idx = 0; if (skb->len >= hdrlen + 3) idx = skb->data[hdrlen + 3] >> 6; crypt = local->crypt_info.crypt[idx]; } pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN); auth_alg = __le16_to_cpu(*pos); pos++; auth_transaction = __le16_to_cpu(*pos); pos++; status_code = __le16_to_cpu(*pos); pos++; if (ether_addr_equal(dev->dev_addr, hdr->addr2) || ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) { txt = "authentication denied"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (((local->auth_algs & PRISM2_AUTH_OPEN) && auth_alg == WLAN_AUTH_OPEN) || ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) && crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) { } else { txt = "unsupported algorithm"; resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; goto fail; } if (len >= 8) { u8 *u = (u8 *) pos; if (*u == WLAN_EID_CHALLENGE) { if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) { txt = "invalid challenge len"; resp = WLAN_STATUS_CHALLENGE_FAIL; goto fail; } if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) { txt = "challenge underflow"; resp = WLAN_STATUS_CHALLENGE_FAIL; goto fail; } challenge = (char *) (u + 2); } } if (sta && sta->ap) { if (time_after(jiffies, sta->u.ap.last_beacon + (10 * sta->listen_interval * HZ) / 1024)) { PDEBUG(DEBUG_AP, "%s: no beacons received for a while," " assuming AP %pM is now STA\n", dev->name, sta->addr); sta->ap = 0; sta->flags = 0; sta->u.sta.challenge = NULL; } else { txt = "AP trying to authenticate?"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } } if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) || (auth_alg == WLAN_AUTH_SHARED_KEY && (auth_transaction == 1 || (auth_transaction == 3 && sta != NULL && sta->u.sta.challenge != NULL)))) { } else { txt = "unknown authentication transaction number"; resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; goto fail; } if (sta == NULL) { txt = "new STA"; if (local->ap->num_sta >= MAX_STA_COUNT) { /* FIX: might try to remove some old STAs first? */ txt = "no more room for new STAs"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } sta = ap_add_sta(local->ap, hdr->addr2); if (sta == NULL) { txt = "ap_add_sta failed"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } } switch (auth_alg) { case WLAN_AUTH_OPEN: txt = "authOK"; /* IEEE 802.11 standard is not completely clear about * whether STA is considered authenticated after * authentication OK frame has been send or after it * has been ACKed. In order to reduce interoperability * issues, mark the STA authenticated before ACK. */ sta->flags |= WLAN_STA_AUTH; break; case WLAN_AUTH_SHARED_KEY: if (auth_transaction == 1) { if (sta->u.sta.challenge == NULL) { sta->u.sta.challenge = ap_auth_make_challenge(local->ap); if (sta->u.sta.challenge == NULL) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } } } else { if (sta->u.sta.challenge == NULL || challenge == NULL || memcmp(sta->u.sta.challenge, challenge, WLAN_AUTH_CHALLENGE_LEN) != 0 || !ieee80211_has_protected(hdr->frame_control)) { txt = "challenge response incorrect"; resp = WLAN_STATUS_CHALLENGE_FAIL; goto fail; } txt = "challenge OK - authOK"; /* IEEE 802.11 standard is not completely clear about * whether STA is considered authenticated after * authentication OK frame has been send or after it * has been ACKed. In order to reduce interoperability * issues, mark the STA authenticated before ACK. */ sta->flags |= WLAN_STA_AUTH; kfree(sta->u.sta.challenge); sta->u.sta.challenge = NULL; } break; } fail: pos = (__le16 *) body; *pos = cpu_to_le16(auth_alg); pos++; *pos = cpu_to_le16(auth_transaction + 1); pos++; *pos = cpu_to_le16(resp); /* status_code */ pos++; olen = 6; if (resp == WLAN_STATUS_SUCCESS && sta != NULL && sta->u.sta.challenge != NULL && auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) { u8 *tmp = (u8 *) pos; *tmp++ = WLAN_EID_CHALLENGE; *tmp++ = WLAN_AUTH_CHALLENGE_LEN; pos++; memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN); olen += 2 + WLAN_AUTH_CHALLENGE_LEN; } prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH, body, olen, hdr->addr2, ap->tx_callback_auth); if (sta) { sta->last_rx = jiffies; atomic_dec(&sta->users); } if (resp) { PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d " "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n", dev->name, hdr->addr2, auth_alg, auth_transaction, status_code, len, le16_to_cpu(hdr->frame_control), resp, txt); } } /* Called only as a scheduled task for pending AP frames. */ static void handle_assoc(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats, int reassoc) { struct net_device *dev = local->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; char body[12], *p, *lpos; int len, left; __le16 *pos; u16 resp = WLAN_STATUS_SUCCESS; struct sta_info *sta = NULL; int send_deauth = 0; char __always_unused *txt = ""; u8 prev_ap[ETH_ALEN]; left = len = skb->len - IEEE80211_MGMT_HDR_LEN; if (len < (reassoc ? 10 : 4)) { PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload " "(len=%d, reassoc=%d) from %pM\n", dev->name, len, reassoc, hdr->addr2); return; } spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { spin_unlock_bh(&local->ap->sta_table_lock); txt = "trying to associate before authentication"; send_deauth = 1; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; sta = NULL; /* do not decrement sta->users */ goto fail; } atomic_inc(&sta->users); spin_unlock_bh(&local->ap->sta_table_lock); pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN); sta->capability = __le16_to_cpu(*pos); pos++; left -= 2; sta->listen_interval = __le16_to_cpu(*pos); pos++; left -= 2; if (reassoc) { memcpy(prev_ap, pos, ETH_ALEN); pos++; pos++; pos++; left -= 6; } else eth_zero_addr(prev_ap); if (left >= 2) { unsigned int ileft; unsigned char *u = (unsigned char *) pos; if (*u == WLAN_EID_SSID) { u++; left--; ileft = *u; u++; left--; if (ileft > left || ileft > MAX_SSID_LEN) { txt = "SSID overflow"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (ileft != strlen(local->essid) || memcmp(local->essid, u, ileft) != 0) { txt = "not our SSID"; resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC; goto fail; } u += ileft; left -= ileft; } if (left >= 2 && *u == WLAN_EID_SUPP_RATES) { u++; left--; ileft = *u; u++; left--; if (ileft > left || ileft == 0 || ileft > WLAN_SUPP_RATES_MAX) { txt = "SUPP_RATES len error"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } memset(sta->supported_rates, 0, sizeof(sta->supported_rates)); memcpy(sta->supported_rates, u, ileft); prism2_check_tx_rates(sta); u += ileft; left -= ileft; } if (left > 0) { PDEBUG(DEBUG_AP, "%s: assoc from %pM" " with extra data (%d bytes) [", dev->name, hdr->addr2, left); while (left > 0) { PDEBUG2(DEBUG_AP, "<%02x>", *u); u++; left--; } PDEBUG2(DEBUG_AP, "]\n"); } } else { txt = "frame underflow"; resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } /* get a unique AID */ if (sta->aid > 0) txt = "OK, old AID"; else { spin_lock_bh(&local->ap->sta_table_lock); for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++) if (local->ap->sta_aid[sta->aid - 1] == NULL) break; if (sta->aid > MAX_AID_TABLE_SIZE) { sta->aid = 0; spin_unlock_bh(&local->ap->sta_table_lock); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; txt = "no room for more AIDs"; } else { local->ap->sta_aid[sta->aid - 1] = sta; spin_unlock_bh(&local->ap->sta_table_lock); txt = "OK, new AID"; } } fail: pos = (__le16 *) body; if (send_deauth) { *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH); pos++; } else { /* FIX: CF-Pollable and CF-PollReq should be set to match the * values in beacons/probe responses */ /* FIX: how about privacy and WEP? */ /* capability */ *pos = cpu_to_le16(WLAN_CAPABILITY_ESS); pos++; /* status_code */ *pos = cpu_to_le16(resp); pos++; *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) | BIT(14) | BIT(15)); /* AID */ pos++; /* Supported rates (Information element) */ p = (char *) pos; *p++ = WLAN_EID_SUPP_RATES; lpos = p; *p++ = 0; /* len */ if (local->tx_rate_control & WLAN_RATE_1M) { *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02; (*lpos)++; } if (local->tx_rate_control & WLAN_RATE_2M) { *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04; (*lpos)++; } if (local->tx_rate_control & WLAN_RATE_5M5) { *p++ = local->basic_rates & WLAN_RATE_5M5 ? 0x8b : 0x0b; (*lpos)++; } if (local->tx_rate_control & WLAN_RATE_11M) { *p++ = local->basic_rates & WLAN_RATE_11M ? 0x96 : 0x16; (*lpos)++; } pos = (__le16 *) p; } prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | (send_deauth ? IEEE80211_STYPE_DEAUTH : (reassoc ? IEEE80211_STYPE_REASSOC_RESP : IEEE80211_STYPE_ASSOC_RESP)), body, (u8 *) pos - (u8 *) body, hdr->addr2, send_deauth ? 0 : local->ap->tx_callback_assoc); if (sta) { if (resp == WLAN_STATUS_SUCCESS) { sta->last_rx = jiffies; /* STA will be marked associated from TX callback, if * AssocResp is ACKed */ } atomic_dec(&sta->users); } #if 0 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d " "prev_ap=%pM) => %d(%d) (%s)\n", dev->name, hdr->addr2, reassoc ? "re" : "", len, prev_ap, resp, send_deauth, txt); #endif } /* Called only as a scheduled task for pending AP frames. */ static void handle_deauth(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { struct net_device *dev = local->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN); int len; u16 reason_code; __le16 *pos; struct sta_info *sta = NULL; len = skb->len - IEEE80211_MGMT_HDR_LEN; if (len < 2) { printk("handle_deauth - too short payload (len=%d)\n", len); return; } pos = (__le16 *) body; reason_code = le16_to_cpu(*pos); PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, " "reason_code=%d\n", dev->name, hdr->addr2, len, reason_code); spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta != NULL) { if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap) hostap_event_expired_sta(local->dev, sta); sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC); } spin_unlock_bh(&local->ap->sta_table_lock); if (sta == NULL) { printk("%s: deauthentication from %pM, " "reason_code=%d, but STA not authenticated\n", dev->name, hdr->addr2, reason_code); } } /* Called only as a scheduled task for pending AP frames. */ static void handle_disassoc(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { struct net_device *dev = local->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; char *body = skb->data + IEEE80211_MGMT_HDR_LEN; int len; u16 reason_code; __le16 *pos; struct sta_info *sta = NULL; len = skb->len - IEEE80211_MGMT_HDR_LEN; if (len < 2) { printk("handle_disassoc - too short payload (len=%d)\n", len); return; } pos = (__le16 *) body; reason_code = le16_to_cpu(*pos); PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, " "reason_code=%d\n", dev->name, hdr->addr2, len, reason_code); spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta != NULL) { if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap) hostap_event_expired_sta(local->dev, sta); sta->flags &= ~WLAN_STA_ASSOC; } spin_unlock_bh(&local->ap->sta_table_lock); if (sta == NULL) { printk("%s: disassociation from %pM, " "reason_code=%d, but STA not authenticated\n", dev->name, hdr->addr2, reason_code); } } /* Called only as a scheduled task for pending AP frames. */ static void ap_handle_data_nullfunc(local_info_t *local, struct ieee80211_hdr *hdr) { struct net_device *dev = local->dev; /* some STA f/w's seem to require control::ACK frame for * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does * not send this.. * send control::ACK for the data::nullfunc */ printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n"); prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK, NULL, 0, hdr->addr2, 0); } /* Called only as a scheduled task for pending AP frames. */ static void ap_handle_dropped_data(local_info_t *local, struct ieee80211_hdr *hdr) { struct net_device *dev = local->dev; struct sta_info *sta; __le16 reason; spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&local->ap->sta_table_lock); if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) { PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n"); atomic_dec(&sta->users); return; } reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ? IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC), (char *) &reason, sizeof(reason), hdr->addr2, 0); if (sta) atomic_dec(&sta->users); } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ /* Called only as a scheduled task for pending AP frames. */ static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta, struct sk_buff *skb) { struct hostap_skb_tx_data *meta; if (!(sta->flags & WLAN_STA_PS)) { /* Station has moved to non-PS mode, so send all buffered * frames using normal device queue. */ dev_queue_xmit(skb); return; } /* add a flag for hostap_handle_sta_tx() to know that this skb should * be passed through even though STA is using PS */ meta = (struct hostap_skb_tx_data *) skb->cb; meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME; if (!skb_queue_empty(&sta->tx_buf)) { /* indicate to STA that more frames follow */ meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA; } dev_queue_xmit(skb); } /* Called only as a scheduled task for pending AP frames. */ static void handle_pspoll(local_info_t *local, struct ieee80211_hdr *hdr, struct hostap_80211_rx_status *rx_stats) { struct net_device *dev = local->dev; struct sta_info *sta; u16 aid; struct sk_buff *skb; PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n", hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control)); if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) { PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=%pM not own MAC\n", hdr->addr1); return; } aid = le16_to_cpu(hdr->duration_id); if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) { PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n"); return; } aid &= ~(BIT(15) | BIT(14)); if (aid == 0 || aid > MAX_AID_TABLE_SIZE) { PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid); return; } PDEBUG(DEBUG_PS2, " aid=%d\n", aid); spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&local->ap->sta_table_lock); if (sta == NULL) { PDEBUG(DEBUG_PS, " STA not found\n"); return; } if (sta->aid != aid) { PDEBUG(DEBUG_PS, " received aid=%i does not match with " "assoc.aid=%d\n", aid, sta->aid); return; } /* FIX: todo: * - add timeout for buffering (clear aid in TIM vector if buffer timed * out (expiry time must be longer than ListenInterval for * the corresponding STA; "8802-11: 11.2.1.9 AP aging function" * - what to do, if buffered, pspolled, and sent frame is not ACKed by * sta; store buffer for later use and leave TIM aid bit set? use * TX event to check whether frame was ACKed? */ while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) { /* send buffered frame .. */ PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL" " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf)); pspoll_send_buffered(local, sta, skb); if (sta->flags & WLAN_STA_PS) { /* send only one buffered packet per PS Poll */ /* FIX: should ignore further PS Polls until the * buffered packet that was just sent is acknowledged * (Tx or TxExc event) */ break; } } if (skb_queue_empty(&sta->tx_buf)) { /* try to clear aid from TIM */ if (!(sta->flags & WLAN_STA_TIM)) PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n", aid); hostap_set_tim(local, aid, 0); sta->flags &= ~WLAN_STA_TIM; } atomic_dec(&sta->users); } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT static void handle_wds_oper_queue(struct work_struct *work) { struct ap_data *ap = container_of(work, struct ap_data, wds_oper_queue); local_info_t *local = ap->local; struct wds_oper_data *entry, *prev; spin_lock_bh(&local->lock); entry = local->ap->wds_oper_entries; local->ap->wds_oper_entries = NULL; spin_unlock_bh(&local->lock); while (entry) { PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection " "to AP %pM\n", local->dev->name, entry->type == WDS_ADD ? "adding" : "removing", entry->addr); if (entry->type == WDS_ADD) prism2_wds_add(local, entry->addr, 0); else if (entry->type == WDS_DEL) prism2_wds_del(local, entry->addr, 0, 1); prev = entry; entry = entry->next; kfree(prev); } } /* Called only as a scheduled task for pending AP frames. */ static void handle_beacon(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; char *body = skb->data + IEEE80211_MGMT_HDR_LEN; int len, left; u16 beacon_int, capability; __le16 *pos; char *ssid = NULL; unsigned char *supp_rates = NULL; int ssid_len = 0, supp_rates_len = 0; struct sta_info *sta = NULL; int new_sta = 0, channel = -1; len = skb->len - IEEE80211_MGMT_HDR_LEN; if (len < 8 + 2 + 2) { printk(KERN_DEBUG "handle_beacon - too short payload " "(len=%d)\n", len); return; } pos = (__le16 *) body; left = len; /* Timestamp (8 octets) */ pos += 4; left -= 8; /* Beacon interval (2 octets) */ beacon_int = le16_to_cpu(*pos); pos++; left -= 2; /* Capability information (2 octets) */ capability = le16_to_cpu(*pos); pos++; left -= 2; if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS && capability & WLAN_CAPABILITY_IBSS) return; if (left >= 2) { unsigned int ileft; unsigned char *u = (unsigned char *) pos; if (*u == WLAN_EID_SSID) { u++; left--; ileft = *u; u++; left--; if (ileft > left || ileft > MAX_SSID_LEN) { PDEBUG(DEBUG_AP, "SSID: overflow\n"); return; } if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID && (ileft != strlen(local->essid) || memcmp(local->essid, u, ileft) != 0)) { /* not our SSID */ return; } ssid = u; ssid_len = ileft; u += ileft; left -= ileft; } if (*u == WLAN_EID_SUPP_RATES) { u++; left--; ileft = *u; u++; left--; if (ileft > left || ileft == 0 || ileft > 8) { PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n"); return; } supp_rates = u; supp_rates_len = ileft; u += ileft; left -= ileft; } if (*u == WLAN_EID_DS_PARAMS) { u++; left--; ileft = *u; u++; left--; if (ileft > left || ileft != 1) { PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n"); return; } channel = *u; u += ileft; left -= ileft; } } spin_lock_bh(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta != NULL) atomic_inc(&sta->users); spin_unlock_bh(&local->ap->sta_table_lock); if (sta == NULL) { /* add new AP */ new_sta = 1; sta = ap_add_sta(local->ap, hdr->addr2); if (sta == NULL) { printk(KERN_INFO "prism2: kmalloc failed for AP " "data structure\n"); return; } hostap_event_new_sta(local->dev, sta); /* mark APs authentication and associated for pseudo ad-hoc * style communication */ sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC; if (local->ap->autom_ap_wds) { hostap_wds_link_oper(local, sta->addr, WDS_ADD); } } sta->ap = 1; if (ssid) { sta->u.ap.ssid_len = ssid_len; memcpy(sta->u.ap.ssid, ssid, ssid_len); sta->u.ap.ssid[ssid_len] = '\0'; } else { sta->u.ap.ssid_len = 0; sta->u.ap.ssid[0] = '\0'; } sta->u.ap.channel = channel; sta->rx_packets++; sta->rx_bytes += len; sta->u.ap.last_beacon = sta->last_rx = jiffies; sta->capability = capability; sta->listen_interval = beacon_int; atomic_dec(&sta->users); if (new_sta) { memset(sta->supported_rates, 0, sizeof(sta->supported_rates)); memcpy(sta->supported_rates, supp_rates, supp_rates_len); prism2_check_tx_rates(sta); } } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ /* Called only as a tasklet. */ static void handle_ap_item(local_info_t *local, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT struct net_device *dev = local->dev; #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ u16 fc, type, stype; struct ieee80211_hdr *hdr; /* FIX: should give skb->len to handler functions and check that the * buffer is long enough */ hdr = (struct ieee80211_hdr *) skb->data; fc = le16_to_cpu(hdr->frame_control); type = fc & IEEE80211_FCTL_FTYPE; stype = fc & IEEE80211_FCTL_STYPE; #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (!local->hostapd && type == IEEE80211_FTYPE_DATA) { PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n"); if (!(fc & IEEE80211_FCTL_TODS) || (fc & IEEE80211_FCTL_FROMDS)) { if (stype == IEEE80211_STYPE_NULLFUNC) { /* no ToDS nullfunc seems to be used to check * AP association; so send reject message to * speed up re-association */ ap_handle_dropped_data(local, hdr); goto done; } PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n", fc); goto done; } if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) { PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM" " not own MAC\n", hdr->addr1); goto done; } if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC) ap_handle_data_nullfunc(local, hdr); else ap_handle_dropped_data(local, hdr); goto done; } if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) { handle_beacon(local, skb, rx_stats); goto done; } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) { handle_pspoll(local, hdr, rx_stats); goto done; } if (local->hostapd) { PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x " "subtype=0x%02x\n", type, stype); goto done; } #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (type != IEEE80211_FTYPE_MGMT) { PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n"); goto done; } if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) { PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM" " not own MAC\n", hdr->addr1); goto done; } if (!ether_addr_equal(hdr->addr3, dev->dev_addr)) { PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM" " not own MAC\n", hdr->addr3); goto done; } switch (stype) { case IEEE80211_STYPE_ASSOC_REQ: handle_assoc(local, skb, rx_stats, 0); break; case IEEE80211_STYPE_ASSOC_RESP: PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n"); break; case IEEE80211_STYPE_REASSOC_REQ: handle_assoc(local, skb, rx_stats, 1); break; case IEEE80211_STYPE_REASSOC_RESP: PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n"); break; case IEEE80211_STYPE_ATIM: PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n"); break; case IEEE80211_STYPE_DISASSOC: handle_disassoc(local, skb, rx_stats); break; case IEEE80211_STYPE_AUTH: handle_authen(local, skb, rx_stats); break; case IEEE80211_STYPE_DEAUTH: handle_deauth(local, skb, rx_stats); break; default: PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n", stype >> 4); break; } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ done: dev_kfree_skb(skb); } /* Called only as a tasklet (software IRQ) */ void hostap_rx(struct net_device *dev, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats) { struct hostap_interface *iface; local_info_t *local; struct ieee80211_hdr *hdr; iface = netdev_priv(dev); local = iface->local; if (skb->len < 16) goto drop; dev->stats.rx_packets++; hdr = (struct ieee80211_hdr *) skb->data; if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL && ieee80211_is_beacon(hdr->frame_control)) goto drop; skb->protocol = cpu_to_be16(ETH_P_HOSTAP); handle_ap_item(local, skb, rx_stats); return; drop: dev_kfree_skb(skb); } /* Called only as a tasklet (software IRQ) */ static void schedule_packet_send(local_info_t *local, struct sta_info *sta) { struct sk_buff *skb; struct ieee80211_hdr *hdr; struct hostap_80211_rx_status rx_stats; if (skb_queue_empty(&sta->tx_buf)) return; skb = dev_alloc_skb(16); if (skb == NULL) { printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc " "failed\n", local->dev->name); return; } hdr = skb_put(skb, 16); /* Generate a fake pspoll frame to start packet delivery */ hdr->frame_control = cpu_to_le16( IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL); memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN); memcpy(hdr->addr2, sta->addr, ETH_ALEN); hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14)); PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for STA %pM\n", local->dev->name, sta->addr); skb->dev = local->dev; memset(&rx_stats, 0, sizeof(rx_stats)); hostap_rx(local->dev, skb, &rx_stats); } int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[], struct iw_quality qual[], int buf_size, int aplist) { struct ap_data *ap = local->ap; struct list_head *ptr; int count = 0; spin_lock_bh(&ap->sta_table_lock); for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list; ptr = ptr->next) { struct sta_info *sta = (struct sta_info *) ptr; if (aplist && !sta->ap) continue; addr[count].sa_family = ARPHRD_ETHER; memcpy(addr[count].sa_data, sta->addr, ETH_ALEN); if (sta->last_rx_silence == 0) qual[count].qual = sta->last_rx_signal < 27 ? 0 : (sta->last_rx_signal - 27) * 92 / 127; else qual[count].qual = sta->last_rx_signal - sta->last_rx_silence - 35; qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal); qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence); qual[count].updated = sta->last_rx_updated; sta->last_rx_updated = IW_QUAL_DBM; count++; if (count >= buf_size) break; } spin_unlock_bh(&ap->sta_table_lock); return count; } /* Translate our list of Access Points & Stations to a card independent * format that the Wireless Tools will understand - Jean II */ int prism2_ap_translate_scan(struct net_device *dev, struct iw_request_info *info, char *buffer) { struct hostap_interface *iface; local_info_t *local; struct ap_data *ap; struct list_head *ptr; struct iw_event iwe; char *current_ev = buffer; char *end_buf = buffer + IW_SCAN_MAX_DATA; #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT) char buf[64]; #endif iface = netdev_priv(dev); local = iface->local; ap = local->ap; spin_lock_bh(&ap->sta_table_lock); for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list; ptr = ptr->next) { struct sta_info *sta = (struct sta_info *) ptr; /* First entry *MUST* be the AP MAC address */ memset(&iwe, 0, sizeof(iwe)); iwe.cmd = SIOCGIWAP; iwe.u.ap_addr.sa_family = ARPHRD_ETHER; memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN); iwe.len = IW_EV_ADDR_LEN; current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, IW_EV_ADDR_LEN); /* Use the mode to indicate if it's a station or * an Access Point */ memset(&iwe, 0, sizeof(iwe)); iwe.cmd = SIOCGIWMODE; if (sta->ap) iwe.u.mode = IW_MODE_MASTER; else iwe.u.mode = IW_MODE_INFRA; iwe.len = IW_EV_UINT_LEN; current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, IW_EV_UINT_LEN); /* Some quality */ memset(&iwe, 0, sizeof(iwe)); iwe.cmd = IWEVQUAL; if (sta->last_rx_silence == 0) iwe.u.qual.qual = sta->last_rx_signal < 27 ? 0 : (sta->last_rx_signal - 27) * 92 / 127; else iwe.u.qual.qual = sta->last_rx_signal - sta->last_rx_silence - 35; iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal); iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence); iwe.u.qual.updated = sta->last_rx_updated; iwe.len = IW_EV_QUAL_LEN; current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, IW_EV_QUAL_LEN); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT if (sta->ap) { memset(&iwe, 0, sizeof(iwe)); iwe.cmd = SIOCGIWESSID; iwe.u.data.length = sta->u.ap.ssid_len; iwe.u.data.flags = 1; current_ev = iwe_stream_add_point(info, current_ev, end_buf, &iwe, sta->u.ap.ssid); memset(&iwe, 0, sizeof(iwe)); iwe.cmd = SIOCGIWENCODE; if (sta->capability & WLAN_CAPABILITY_PRIVACY) iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; else iwe.u.data.flags = IW_ENCODE_DISABLED; current_ev = iwe_stream_add_point(info, current_ev, end_buf, &iwe, sta->u.ap.ssid); if (sta->u.ap.channel > 0 && sta->u.ap.channel <= FREQ_COUNT) { memset(&iwe, 0, sizeof(iwe)); iwe.cmd = SIOCGIWFREQ; iwe.u.freq.m = freq_list[sta->u.ap.channel - 1] * 100000; iwe.u.freq.e = 1; current_ev = iwe_stream_add_event( info, current_ev, end_buf, &iwe, IW_EV_FREQ_LEN); } memset(&iwe, 0, sizeof(iwe)); iwe.cmd = IWEVCUSTOM; sprintf(buf, "beacon_interval=%d", sta->listen_interval); iwe.u.data.length = strlen(buf); current_ev = iwe_stream_add_point(info, current_ev, end_buf, &iwe, buf); } #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ sta->last_rx_updated = IW_QUAL_DBM; /* To be continued, we should make good use of IWEVCUSTOM */ } spin_unlock_bh(&ap->sta_table_lock); return current_ev - buffer; } static int prism2_hostapd_add_sta(struct ap_data *ap, struct prism2_hostapd_param *param) { struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, param->sta_addr); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&ap->sta_table_lock); if (sta == NULL) { sta = ap_add_sta(ap, param->sta_addr); if (sta == NULL) return -1; } if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local) hostap_event_new_sta(sta->local->dev, sta); sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; sta->last_rx = jiffies; sta->aid = param->u.add_sta.aid; sta->capability = param->u.add_sta.capability; sta->tx_supp_rates = param->u.add_sta.tx_supp_rates; if (sta->tx_supp_rates & WLAN_RATE_1M) sta->supported_rates[0] = 2; if (sta->tx_supp_rates & WLAN_RATE_2M) sta->supported_rates[1] = 4; if (sta->tx_supp_rates & WLAN_RATE_5M5) sta->supported_rates[2] = 11; if (sta->tx_supp_rates & WLAN_RATE_11M) sta->supported_rates[3] = 22; prism2_check_tx_rates(sta); atomic_dec(&sta->users); return 0; } static int prism2_hostapd_remove_sta(struct ap_data *ap, struct prism2_hostapd_param *param) { struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, param->sta_addr); if (sta) { ap_sta_hash_del(ap, sta); list_del(&sta->list); } spin_unlock_bh(&ap->sta_table_lock); if (!sta) return -ENOENT; if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local) hostap_event_expired_sta(sta->local->dev, sta); ap_free_sta(ap, sta); return 0; } static int prism2_hostapd_get_info_sta(struct ap_data *ap, struct prism2_hostapd_param *param) { struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, param->sta_addr); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&ap->sta_table_lock); if (!sta) return -ENOENT; param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ; atomic_dec(&sta->users); return 1; } static int prism2_hostapd_set_flags_sta(struct ap_data *ap, struct prism2_hostapd_param *param) { struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, param->sta_addr); if (sta) { sta->flags |= param->u.set_flags_sta.flags_or; sta->flags &= param->u.set_flags_sta.flags_and; } spin_unlock_bh(&ap->sta_table_lock); if (!sta) return -ENOENT; return 0; } static int prism2_hostapd_sta_clear_stats(struct ap_data *ap, struct prism2_hostapd_param *param) { struct sta_info *sta; int rate; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, param->sta_addr); if (sta) { sta->rx_packets = sta->tx_packets = 0; sta->rx_bytes = sta->tx_bytes = 0; for (rate = 0; rate < WLAN_RATE_COUNT; rate++) { sta->tx_count[rate] = 0; sta->rx_count[rate] = 0; } } spin_unlock_bh(&ap->sta_table_lock); if (!sta) return -ENOENT; return 0; } int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param) { switch (param->cmd) { case PRISM2_HOSTAPD_FLUSH: ap_control_kickall(ap); return 0; case PRISM2_HOSTAPD_ADD_STA: return prism2_hostapd_add_sta(ap, param); case PRISM2_HOSTAPD_REMOVE_STA: return prism2_hostapd_remove_sta(ap, param); case PRISM2_HOSTAPD_GET_INFO_STA: return prism2_hostapd_get_info_sta(ap, param); case PRISM2_HOSTAPD_SET_FLAGS_STA: return prism2_hostapd_set_flags_sta(ap, param); case PRISM2_HOSTAPD_STA_CLEAR_STATS: return prism2_hostapd_sta_clear_stats(ap, param); default: printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n", param->cmd); return -EOPNOTSUPP; } } /* Update station info for host-based TX rate control and return current * TX rate */ static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev) { int ret = sta->tx_rate; struct hostap_interface *iface; local_info_t *local; iface = netdev_priv(dev); local = iface->local; sta->tx_count[sta->tx_rate_idx]++; sta->tx_since_last_failure++; sta->tx_consecutive_exc = 0; if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT && sta->tx_rate_idx < sta->tx_max_rate) { /* use next higher rate */ int old_rate, new_rate; old_rate = new_rate = sta->tx_rate_idx; while (new_rate < sta->tx_max_rate) { new_rate++; if (ap_tx_rate_ok(new_rate, sta, local)) { sta->tx_rate_idx = new_rate; break; } } if (old_rate != sta->tx_rate_idx) { switch (sta->tx_rate_idx) { case 0: sta->tx_rate = 10; break; case 1: sta->tx_rate = 20; break; case 2: sta->tx_rate = 55; break; case 3: sta->tx_rate = 110; break; default: sta->tx_rate = 0; break; } PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n", dev->name, sta->addr, sta->tx_rate); } sta->tx_since_last_failure = 0; } return ret; } /* Called only from software IRQ. Called for each TX frame prior possible * encryption and transmit. */ ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx) { struct sta_info *sta = NULL; struct sk_buff *skb = tx->skb; int set_tim, ret; struct ieee80211_hdr *hdr; struct hostap_skb_tx_data *meta; meta = (struct hostap_skb_tx_data *) skb->cb; ret = AP_TX_CONTINUE; if (local->ap == NULL || skb->len < 10 || meta->iface->type == HOSTAP_INTERFACE_STA) goto out; hdr = (struct ieee80211_hdr *) skb->data; if (hdr->addr1[0] & 0x01) { /* broadcast/multicast frame - no AP related processing */ if (local->ap->num_sta <= 0) ret = AP_TX_DROP; goto out; } /* unicast packet - check whether destination STA is associated */ spin_lock(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr1); if (sta) atomic_inc(&sta->users); spin_unlock(&local->ap->sta_table_lock); if (local->iw_mode == IW_MODE_MASTER && sta == NULL && !(meta->flags & HOSTAP_TX_FLAGS_WDS) && meta->iface->type != HOSTAP_INTERFACE_MASTER && meta->iface->type != HOSTAP_INTERFACE_AP) { #if 0 /* This can happen, e.g., when wlan0 is added to a bridge and * bridging code does not know which port is the correct target * for a unicast frame. In this case, the packet is send to all * ports of the bridge. Since this is a valid scenario, do not * print out any errors here. */ if (net_ratelimit()) { printk(KERN_DEBUG "AP: drop packet to non-associated " "STA %pM\n", hdr->addr1); } #endif local->ap->tx_drop_nonassoc++; ret = AP_TX_DROP; goto out; } if (sta == NULL) goto out; if (!(sta->flags & WLAN_STA_AUTHORIZED)) ret = AP_TX_CONTINUE_NOT_AUTHORIZED; /* Set tx_rate if using host-based TX rate control */ if (!local->fw_tx_rate_control) local->ap->last_tx_rate = meta->rate = ap_update_sta_tx_rate(sta, local->dev); if (local->iw_mode != IW_MODE_MASTER) goto out; if (!(sta->flags & WLAN_STA_PS)) goto out; if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) { /* indicate to STA that more frames follow */ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); } if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) { /* packet was already buffered and now send due to * PS poll, so do not rebuffer it */ goto out; } if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) { PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s" "PS mode buffer\n", local->dev->name, sta->addr); /* Make sure that TIM is set for the station (it might not be * after AP wlan hw reset). */ /* FIX: should fix hw reset to restore bits based on STA * buffer state.. */ hostap_set_tim(local, sta->aid, 1); sta->flags |= WLAN_STA_TIM; ret = AP_TX_DROP; goto out; } /* STA in PS mode, buffer frame for later delivery */ set_tim = skb_queue_empty(&sta->tx_buf); skb_queue_tail(&sta->tx_buf, skb); /* FIX: could save RX time to skb and expire buffered frames after * some time if STA does not poll for them */ if (set_tim) { if (sta->flags & WLAN_STA_TIM) PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n", sta->aid); hostap_set_tim(local, sta->aid, 1); sta->flags |= WLAN_STA_TIM; } ret = AP_TX_BUFFERED; out: if (sta != NULL) { if (ret == AP_TX_CONTINUE || ret == AP_TX_CONTINUE_NOT_AUTHORIZED) { sta->tx_packets++; sta->tx_bytes += skb->len; sta->last_tx = jiffies; } if ((ret == AP_TX_CONTINUE || ret == AP_TX_CONTINUE_NOT_AUTHORIZED) && sta->crypt && tx->host_encrypt) { tx->crypt = sta->crypt; tx->sta_ptr = sta; /* hostap_handle_sta_release() will * be called to release sta info * later */ } else atomic_dec(&sta->users); } return ret; } void hostap_handle_sta_release(void *ptr) { struct sta_info *sta = ptr; atomic_dec(&sta->users); } /* Called only as a tasklet (software IRQ) */ void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb) { struct sta_info *sta; struct ieee80211_hdr *hdr; struct hostap_skb_tx_data *meta; hdr = (struct ieee80211_hdr *) skb->data; meta = (struct hostap_skb_tx_data *) skb->cb; spin_lock(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr1); if (!sta) { spin_unlock(&local->ap->sta_table_lock); PDEBUG(DEBUG_AP, "%s: Could not find STA %pM" " for this TX error (@%lu)\n", local->dev->name, hdr->addr1, jiffies); return; } sta->tx_since_last_failure = 0; sta->tx_consecutive_exc++; if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD && sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) { /* use next lower rate */ int old, rate; old = rate = sta->tx_rate_idx; while (rate > 0) { rate--; if (ap_tx_rate_ok(rate, sta, local)) { sta->tx_rate_idx = rate; break; } } if (old != sta->tx_rate_idx) { switch (sta->tx_rate_idx) { case 0: sta->tx_rate = 10; break; case 1: sta->tx_rate = 20; break; case 2: sta->tx_rate = 55; break; case 3: sta->tx_rate = 110; break; default: sta->tx_rate = 0; break; } PDEBUG(DEBUG_AP, "%s: STA %pM TX rate lowered to %d\n", local->dev->name, sta->addr, sta->tx_rate); } sta->tx_consecutive_exc = 0; } spin_unlock(&local->ap->sta_table_lock); } static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta, int pwrmgt, int type, int stype) { if (pwrmgt && !(sta->flags & WLAN_STA_PS)) { sta->flags |= WLAN_STA_PS; PDEBUG(DEBUG_PS2, "STA %pM changed to use PS " "mode (type=0x%02X, stype=0x%02X)\n", sta->addr, type >> 2, stype >> 4); } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) { sta->flags &= ~WLAN_STA_PS; PDEBUG(DEBUG_PS2, "STA %pM changed to not use " "PS mode (type=0x%02X, stype=0x%02X)\n", sta->addr, type >> 2, stype >> 4); if (type != IEEE80211_FTYPE_CTL || stype != IEEE80211_STYPE_PSPOLL) schedule_packet_send(local, sta); } } /* Called only as a tasklet (software IRQ). Called for each RX frame to update * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */ int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr) { struct sta_info *sta; u16 fc; spin_lock(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock(&local->ap->sta_table_lock); if (!sta) return -1; fc = le16_to_cpu(hdr->frame_control); hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM, fc & IEEE80211_FCTL_FTYPE, fc & IEEE80211_FCTL_STYPE); atomic_dec(&sta->users); return 0; } /* Called only as a tasklet (software IRQ). Called for each RX frame after * getting RX header and payload from hardware. */ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev, struct sk_buff *skb, struct hostap_80211_rx_status *rx_stats, int wds) { int ret; struct sta_info *sta; u16 fc, type, stype; struct ieee80211_hdr *hdr; if (local->ap == NULL) return AP_RX_CONTINUE; hdr = (struct ieee80211_hdr *) skb->data; fc = le16_to_cpu(hdr->frame_control); type = fc & IEEE80211_FCTL_FTYPE; stype = fc & IEEE80211_FCTL_STYPE; spin_lock(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock(&local->ap->sta_table_lock); if (sta && !(sta->flags & WLAN_STA_AUTHORIZED)) ret = AP_RX_CONTINUE_NOT_AUTHORIZED; else ret = AP_RX_CONTINUE; if (fc & IEEE80211_FCTL_TODS) { if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { if (local->hostapd) { prism2_rx_80211(local->apdev, skb, rx_stats, PRISM2_RX_NON_ASSOC); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT } else { printk(KERN_DEBUG "%s: dropped received packet" " from non-associated STA %pM" " (type=0x%02x, subtype=0x%02x)\n", dev->name, hdr->addr2, type >> 2, stype >> 4); hostap_rx(dev, skb, rx_stats); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ } ret = AP_RX_EXIT; goto out; } } else if (fc & IEEE80211_FCTL_FROMDS) { if (!wds) { /* FromDS frame - not for us; probably * broadcast/multicast in another BSS - drop */ if (ether_addr_equal(hdr->addr1, dev->dev_addr)) { printk(KERN_DEBUG "Odd.. FromDS packet " "received with own BSSID\n"); hostap_dump_rx_80211(dev->name, skb, rx_stats); } ret = AP_RX_DROP; goto out; } } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL && ether_addr_equal(hdr->addr1, dev->dev_addr)) { if (local->hostapd) { prism2_rx_80211(local->apdev, skb, rx_stats, PRISM2_RX_NON_ASSOC); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT } else { /* At least Lucent f/w seems to send data::nullfunc * frames with no ToDS flag when the current AP returns * after being unavailable for some time. Speed up * re-association by informing the station about it not * being associated. */ printk(KERN_DEBUG "%s: rejected received nullfunc frame" " without ToDS from not associated STA %pM\n", dev->name, hdr->addr2); hostap_rx(dev, skb, rx_stats); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ } ret = AP_RX_EXIT; goto out; } else if (stype == IEEE80211_STYPE_NULLFUNC) { /* At least Lucent cards seem to send periodic nullfunc * frames with ToDS. Let these through to update SQ * stats and PS state. Nullfunc frames do not contain * any data and they will be dropped below. */ } else { /* If BSSID (Addr3) is foreign, this frame is a normal * broadcast frame from an IBSS network. Drop it silently. * If BSSID is own, report the dropping of this frame. */ if (ether_addr_equal(hdr->addr3, dev->dev_addr)) { printk(KERN_DEBUG "%s: dropped received packet from %pM" " with no ToDS flag " "(type=0x%02x, subtype=0x%02x)\n", dev->name, hdr->addr2, type >> 2, stype >> 4); hostap_dump_rx_80211(dev->name, skb, rx_stats); } ret = AP_RX_DROP; goto out; } if (sta) { hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM, type, stype); sta->rx_packets++; sta->rx_bytes += skb->len; sta->last_rx = jiffies; } if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC && fc & IEEE80211_FCTL_TODS) { if (local->hostapd) { prism2_rx_80211(local->apdev, skb, rx_stats, PRISM2_RX_NULLFUNC_ACK); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT } else { /* some STA f/w's seem to require control::ACK frame * for data::nullfunc, but Prism2 f/w 0.8.0 (at least * from Compaq) does not send this.. Try to generate * ACK for these frames from the host driver to make * power saving work with, e.g., Lucent WaveLAN f/w */ hostap_rx(dev, skb, rx_stats); #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ } ret = AP_RX_EXIT; goto out; } out: if (sta) atomic_dec(&sta->users); return ret; } /* Called only as a tasklet (software IRQ) */ int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr, struct lib80211_crypt_data **crypt, void **sta_ptr) { struct sta_info *sta; spin_lock(&local->ap->sta_table_lock); sta = ap_get_sta(local->ap, hdr->addr2); if (sta) atomic_inc(&sta->users); spin_unlock(&local->ap->sta_table_lock); if (!sta) return -1; if (sta->crypt) { *crypt = sta->crypt; *sta_ptr = sta; /* hostap_handle_sta_release() will be called to release STA * info */ } else atomic_dec(&sta->users); return 0; } /* Called only as a tasklet (software IRQ) */ int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr) { struct sta_info *sta; int ret = 0; spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, sta_addr); if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap) ret = 1; spin_unlock(&ap->sta_table_lock); return ret; } /* Called only as a tasklet (software IRQ) */ int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr) { struct sta_info *sta; int ret = 0; spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, sta_addr); if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap && ((sta->flags & WLAN_STA_AUTHORIZED) || ap->local->ieee_802_1x == 0)) ret = 1; spin_unlock(&ap->sta_table_lock); return ret; } /* Called only as a tasklet (software IRQ) */ int hostap_add_sta(struct ap_data *ap, u8 *sta_addr) { struct sta_info *sta; int ret = 1; if (!ap) return -1; spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, sta_addr); if (sta) ret = 0; spin_unlock(&ap->sta_table_lock); if (ret == 1) { sta = ap_add_sta(ap, sta_addr); if (!sta) return -1; sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC; sta->ap = 1; memset(sta->supported_rates, 0, sizeof(sta->supported_rates)); /* No way of knowing which rates are supported since we did not * get supported rates element from beacon/assoc req. Assume * that remote end supports all 802.11b rates. */ sta->supported_rates[0] = 0x82; sta->supported_rates[1] = 0x84; sta->supported_rates[2] = 0x0b; sta->supported_rates[3] = 0x16; sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M | WLAN_RATE_5M5 | WLAN_RATE_11M; sta->tx_rate = 110; sta->tx_max_rate = sta->tx_rate_idx = 3; } return ret; } /* Called only as a tasklet (software IRQ) */ int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr, struct hostap_80211_rx_status *rx_stats) { struct sta_info *sta; if (!ap) return -1; spin_lock(&ap->sta_table_lock); sta = ap_get_sta(ap, hdr->addr2); if (sta) { sta->last_rx_silence = rx_stats->noise; sta->last_rx_signal = rx_stats->signal; sta->last_rx_rate = rx_stats->rate; sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM; if (rx_stats->rate == 10) sta->rx_count[0]++; else if (rx_stats->rate == 20) sta->rx_count[1]++; else if (rx_stats->rate == 55) sta->rx_count[2]++; else if (rx_stats->rate == 110) sta->rx_count[3]++; } spin_unlock(&ap->sta_table_lock); return sta ? 0 : -1; } void hostap_update_rates(local_info_t *local) { struct sta_info *sta; struct ap_data *ap = local->ap; if (!ap) return; spin_lock_bh(&ap->sta_table_lock); list_for_each_entry(sta, &ap->sta_list, list) { prism2_check_tx_rates(sta); } spin_unlock_bh(&ap->sta_table_lock); } void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent, struct lib80211_crypt_data ***crypt) { struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); sta = ap_get_sta(ap, addr); if (sta) atomic_inc(&sta->users); spin_unlock_bh(&ap->sta_table_lock); if (!sta && permanent) sta = ap_add_sta(ap, addr); if (!sta) return NULL; if (permanent) sta->flags |= WLAN_STA_PERM; *crypt = &sta->crypt; return sta; } void hostap_add_wds_links(local_info_t *local) { struct ap_data *ap = local->ap; struct sta_info *sta; spin_lock_bh(&ap->sta_table_lock); list_for_each_entry(sta, &ap->sta_list, list) { if (sta->ap) hostap_wds_link_oper(local, sta->addr, WDS_ADD); } spin_unlock_bh(&ap->sta_table_lock); schedule_work(&local->ap->wds_oper_queue); } void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type) { struct wds_oper_data *entry; entry = kmalloc(sizeof(*entry), GFP_ATOMIC); if (!entry) return; memcpy(entry->addr, addr, ETH_ALEN); entry->type = type; spin_lock_bh(&local->lock); entry->next = local->ap->wds_oper_entries; local->ap->wds_oper_entries = entry; spin_unlock_bh(&local->lock); schedule_work(&local->ap->wds_oper_queue); } EXPORT_SYMBOL(hostap_init_data); EXPORT_SYMBOL(hostap_init_ap_proc); EXPORT_SYMBOL(hostap_free_data); EXPORT_SYMBOL(hostap_check_sta_fw_version); EXPORT_SYMBOL(hostap_handle_sta_tx_exc); #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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