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-rw-r--r--package/d80211/src/ieee80211_sta.c2891
1 files changed, 2891 insertions, 0 deletions
diff --git a/package/d80211/src/ieee80211_sta.c b/package/d80211/src/ieee80211_sta.c
new file mode 100644
index 0000000000..4985afe509
--- /dev/null
+++ b/package/d80211/src/ieee80211_sta.c
@@ -0,0 +1,2891 @@
+/*
+ * BSS client mode implementation
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/* TODO:
+ * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
+ * order BSS list by RSSI(?) ("quality of AP")
+ * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
+ * SSID)
+ */
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/wireless.h>
+#include <linux/random.h>
+#include <net/iw_handler.h>
+#include <asm/types.h>
+#include <asm/delay.h>
+
+#include <net/d80211.h>
+#include <net/d80211_mgmt.h>
+#include "ieee80211_i.h"
+#include "ieee80211_rate.h"
+#include "hostapd_ioctl.h"
+
+#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
+#define IEEE80211_AUTH_MAX_TRIES 3
+#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
+#define IEEE80211_ASSOC_MAX_TRIES 3
+#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
+#define IEEE80211_PROBE_INTERVAL (60 * HZ)
+#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
+#define IEEE80211_SCAN_INTERVAL (2 * HZ)
+#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
+#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
+
+#define IEEE80211_PROBE_DELAY (HZ / 33)
+#define IEEE80211_CHANNEL_TIME (HZ / 33)
+#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
+#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
+#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
+#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
+
+#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
+
+
+#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
+
+#define ERP_INFO_USE_PROTECTION BIT(1)
+
+static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
+ u8 *ssid, size_t ssid_len);
+static struct ieee80211_sta_bss *
+ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
+static void ieee80211_rx_bss_put(struct net_device *dev,
+ struct ieee80211_sta_bss *bss);
+static int ieee80211_sta_find_ibss(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta);
+static int ieee80211_sta_wep_configured(struct net_device *dev);
+
+
+/* Parsed Information Elements */
+struct ieee802_11_elems {
+ u8 *ssid;
+ u8 ssid_len;
+ u8 *supp_rates;
+ u8 supp_rates_len;
+ u8 *fh_params;
+ u8 fh_params_len;
+ u8 *ds_params;
+ u8 ds_params_len;
+ u8 *cf_params;
+ u8 cf_params_len;
+ u8 *tim;
+ u8 tim_len;
+ u8 *ibss_params;
+ u8 ibss_params_len;
+ u8 *challenge;
+ u8 challenge_len;
+ u8 *wpa;
+ u8 wpa_len;
+ u8 *rsn;
+ u8 rsn_len;
+ u8 *erp_info;
+ u8 erp_info_len;
+ u8 *ext_supp_rates;
+ u8 ext_supp_rates_len;
+ u8 *wmm_info;
+ u8 wmm_info_len;
+ u8 *wmm_param;
+ u8 wmm_param_len;
+};
+
+typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
+
+
+static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
+ struct ieee802_11_elems *elems)
+{
+ size_t left = len;
+ u8 *pos = start;
+ int unknown = 0;
+
+ memset(elems, 0, sizeof(*elems));
+
+ while (left >= 2) {
+ u8 id, elen;
+
+ id = *pos++;
+ elen = *pos++;
+ left -= 2;
+
+ if (elen > left) {
+#if 0
+ if (net_ratelimit())
+ printk(KERN_DEBUG "IEEE 802.11 element parse "
+ "failed (id=%d elen=%d left=%d)\n",
+ id, elen, left);
+#endif
+ return ParseFailed;
+ }
+
+ switch (id) {
+ case WLAN_EID_SSID:
+ elems->ssid = pos;
+ elems->ssid_len = elen;
+ break;
+ case WLAN_EID_SUPP_RATES:
+ elems->supp_rates = pos;
+ elems->supp_rates_len = elen;
+ break;
+ case WLAN_EID_FH_PARAMS:
+ elems->fh_params = pos;
+ elems->fh_params_len = elen;
+ break;
+ case WLAN_EID_DS_PARAMS:
+ elems->ds_params = pos;
+ elems->ds_params_len = elen;
+ break;
+ case WLAN_EID_CF_PARAMS:
+ elems->cf_params = pos;
+ elems->cf_params_len = elen;
+ break;
+ case WLAN_EID_TIM:
+ elems->tim = pos;
+ elems->tim_len = elen;
+ break;
+ case WLAN_EID_IBSS_PARAMS:
+ elems->ibss_params = pos;
+ elems->ibss_params_len = elen;
+ break;
+ case WLAN_EID_CHALLENGE:
+ elems->challenge = pos;
+ elems->challenge_len = elen;
+ break;
+ case WLAN_EID_WPA:
+ if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
+ pos[2] == 0xf2) {
+ /* Microsoft OUI (00:50:F2) */
+ if (pos[3] == 1) {
+ /* OUI Type 1 - WPA IE */
+ elems->wpa = pos;
+ elems->wpa_len = elen;
+ } else if (elen >= 5 && pos[3] == 2) {
+ if (pos[4] == 0) {
+ elems->wmm_info = pos;
+ elems->wmm_info_len = elen;
+ } else if (pos[4] == 1) {
+ elems->wmm_param = pos;
+ elems->wmm_param_len = elen;
+ }
+ }
+ }
+ break;
+ case WLAN_EID_RSN:
+ elems->rsn = pos;
+ elems->rsn_len = elen;
+ break;
+ case WLAN_EID_ERP_INFO:
+ elems->erp_info = pos;
+ elems->erp_info_len = elen;
+ break;
+ case WLAN_EID_EXT_SUPP_RATES:
+ elems->ext_supp_rates = pos;
+ elems->ext_supp_rates_len = elen;
+ break;
+ default:
+#if 0
+ printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
+ "unknown element (id=%d elen=%d)\n",
+ id, elen);
+#endif
+ unknown++;
+ break;
+ }
+
+ left -= elen;
+ pos += elen;
+ }
+
+ /* Do not trigger error if left == 1 as Apple Airport base stations
+ * send AssocResps that are one spurious byte too long. */
+
+ return unknown ? ParseUnknown : ParseOK;
+}
+
+
+
+
+static int ecw2cw(int ecw)
+{
+ int cw = 1;
+ while (ecw > 0) {
+ cw <<= 1;
+ ecw--;
+ }
+ return cw - 1;
+}
+
+
+static void ieee80211_sta_wmm_params(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ u8 *wmm_param, size_t wmm_param_len)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_tx_queue_params params;
+ size_t left;
+ int count;
+ u8 *pos;
+
+ if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
+ return;
+ count = wmm_param[6] & 0x0f;
+ if (count == ifsta->wmm_last_param_set)
+ return;
+ ifsta->wmm_last_param_set = count;
+
+ pos = wmm_param + 8;
+ left = wmm_param_len - 8;
+
+ memset(&params, 0, sizeof(params));
+
+ if (!local->ops->conf_tx)
+ return;
+
+ local->wmm_acm = 0;
+ for (; left >= 4; left -= 4, pos += 4) {
+ int aci = (pos[0] >> 5) & 0x03;
+ int acm = (pos[0] >> 4) & 0x01;
+ int queue;
+
+ switch (aci) {
+ case 1:
+ queue = IEEE80211_TX_QUEUE_DATA3;
+ if (acm) {
+ local->wmm_acm |= BIT(1) | BIT(2);
+ }
+ break;
+ case 2:
+ queue = IEEE80211_TX_QUEUE_DATA1;
+ if (acm) {
+ local->wmm_acm |= BIT(4) | BIT(5);
+ }
+ break;
+ case 3:
+ queue = IEEE80211_TX_QUEUE_DATA0;
+ if (acm) {
+ local->wmm_acm |= BIT(6) | BIT(7);
+ }
+ break;
+ case 0:
+ default:
+ queue = IEEE80211_TX_QUEUE_DATA2;
+ if (acm) {
+ local->wmm_acm |= BIT(0) | BIT(3);
+ }
+ break;
+ }
+
+ params.aifs = pos[0] & 0x0f;
+ params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
+ params.cw_min = ecw2cw(pos[1] & 0x0f);
+ /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
+ params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
+ printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
+ "cWmin=%d cWmax=%d burst=%d\n",
+ dev->name, queue, aci, acm, params.aifs, params.cw_min,
+ params.cw_max, params.burst_time);
+ /* TODO: handle ACM (block TX, fallback to next lowest allowed
+ * AC for now) */
+ if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
+ printk(KERN_DEBUG "%s: failed to set TX queue "
+ "parameters for queue %d\n", dev->name, queue);
+ }
+ }
+}
+
+
+static void ieee80211_sta_send_associnfo(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ char *buf;
+ size_t len;
+ int i;
+ union iwreq_data wrqu;
+
+ if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
+ return;
+
+ buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
+ ifsta->assocresp_ies_len), GFP_ATOMIC);
+ if (!buf)
+ return;
+
+ len = sprintf(buf, "ASSOCINFO(");
+ if (ifsta->assocreq_ies) {
+ len += sprintf(buf + len, "ReqIEs=");
+ for (i = 0; i < ifsta->assocreq_ies_len; i++) {
+ len += sprintf(buf + len, "%02x",
+ ifsta->assocreq_ies[i]);
+ }
+ }
+ if (ifsta->assocresp_ies) {
+ if (ifsta->assocreq_ies)
+ len += sprintf(buf + len, " ");
+ len += sprintf(buf + len, "RespIEs=");
+ for (i = 0; i < ifsta->assocresp_ies_len; i++) {
+ len += sprintf(buf + len, "%02x",
+ ifsta->assocresp_ies[i]);
+ }
+ }
+ len += sprintf(buf + len, ")");
+
+ if (len > IW_CUSTOM_MAX) {
+ len = sprintf(buf, "ASSOCRESPIE=");
+ for (i = 0; i < ifsta->assocresp_ies_len; i++) {
+ len += sprintf(buf + len, "%02x",
+ ifsta->assocresp_ies[i]);
+ }
+ }
+
+ memset(&wrqu, 0, sizeof(wrqu));
+ wrqu.data.length = len;
+ wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
+
+ kfree(buf);
+}
+
+
+static void ieee80211_set_associated(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta, int assoc)
+{
+ union iwreq_data wrqu;
+
+ if (ifsta->associated == assoc)
+ return;
+
+ ifsta->associated = assoc;
+
+ if (assoc) {
+ struct ieee80211_sub_if_data *sdata;
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (sdata->type != IEEE80211_IF_TYPE_STA)
+ return;
+ ifsta->prev_bssid_set = 1;
+ memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
+ memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
+ ieee80211_sta_send_associnfo(dev, ifsta);
+ } else {
+ memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
+ }
+ wrqu.ap_addr.sa_family = ARPHRD_ETHER;
+ wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
+ ifsta->last_probe = jiffies;
+}
+
+static void ieee80211_set_disassoc(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta, int deauth)
+{
+ if (deauth)
+ ifsta->auth_tries = 0;
+ ifsta->assoc_tries = 0;
+ ieee80211_set_associated(dev, ifsta, 0);
+}
+
+static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
+ int encrypt, int probe_resp)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_tx_packet_data *pkt_data;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ skb->dev = sdata->local->mdev;
+ skb->mac.raw = skb->nh.raw = skb->h.raw = skb->data;
+
+ pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
+ memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
+ pkt_data->ifindex = sdata->dev->ifindex;
+ pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
+ pkt_data->do_not_encrypt = !encrypt;
+ if (probe_resp)
+ pkt_data->pkt_probe_resp = 1;
+
+ dev_queue_xmit(skb);
+}
+
+
+static void ieee80211_send_auth(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ int transaction, u8 *extra, size_t extra_len,
+ int encrypt)
+{
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+
+ skb = dev_alloc_skb(sizeof(*mgmt) + 6 + extra_len);
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
+ "frame\n", dev->name);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
+ memset(mgmt, 0, 24 + 6);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_AUTH);
+ if (encrypt)
+ mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+ memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+ mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
+ mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
+ ifsta->auth_transaction = transaction + 1;
+ mgmt->u.auth.status_code = cpu_to_le16(0);
+ if (extra)
+ memcpy(skb_put(skb, extra_len), extra, extra_len);
+
+ ieee80211_sta_tx(dev, skb, encrypt, 0);
+}
+
+
+static void ieee80211_authenticate(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ ifsta->auth_tries++;
+ if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
+ printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
+ " timed out\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+ return;
+ }
+
+ ifsta->state = IEEE80211_AUTHENTICATE;
+ printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+
+ ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
+
+ schedule_delayed_work(&ifsta->work, IEEE80211_AUTH_TIMEOUT);
+}
+
+
+static void ieee80211_send_assoc(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+ u8 *pos, *ies;
+ int i, len;
+ u16 capab;
+ struct ieee80211_sta_bss *bss;
+ int wmm = 0;
+
+ skb = dev_alloc_skb(sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
+ ifsta->ssid_len);
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
+ "frame\n", dev->name);
+ return;
+ }
+
+ capab = ifsta->capab;
+ if (local->hw.conf.phymode == MODE_IEEE80211G) {
+ capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
+ WLAN_CAPABILITY_SHORT_PREAMBLE;
+ }
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ if (bss) {
+ if (bss->capability & WLAN_CAPABILITY_PRIVACY)
+ capab |= WLAN_CAPABILITY_PRIVACY;
+ if (bss->wmm_ie) {
+ wmm = 1;
+ }
+ ieee80211_rx_bss_put(dev, bss);
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+
+ if (ifsta->prev_bssid_set) {
+ skb_put(skb, 10);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_REASSOC_REQ);
+ mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
+ mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
+ memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
+ ETH_ALEN);
+ } else {
+ skb_put(skb, 4);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_ASSOC_REQ);
+ mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
+ mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
+ }
+
+ /* SSID */
+ ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
+ *pos++ = WLAN_EID_SSID;
+ *pos++ = ifsta->ssid_len;
+ memcpy(pos, ifsta->ssid, ifsta->ssid_len);
+
+ len = local->num_curr_rates;
+ if (len > 8)
+ len = 8;
+ pos = skb_put(skb, len + 2);
+ *pos++ = WLAN_EID_SUPP_RATES;
+ *pos++ = len;
+ for (i = 0; i < len; i++) {
+ int rate = local->curr_rates[i].rate;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate /= 2;
+ *pos++ = (u8) (rate / 5);
+ }
+
+ if (local->num_curr_rates > len) {
+ pos = skb_put(skb, local->num_curr_rates - len + 2);
+ *pos++ = WLAN_EID_EXT_SUPP_RATES;
+ *pos++ = local->num_curr_rates - len;
+ for (i = len; i < local->num_curr_rates; i++) {
+ int rate = local->curr_rates[i].rate;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate /= 2;
+ *pos++ = (u8) (rate / 5);
+ }
+ }
+
+ if (ifsta->extra_ie) {
+ pos = skb_put(skb, ifsta->extra_ie_len);
+ memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
+ }
+
+ if (wmm && ifsta->wmm_enabled) {
+ pos = skb_put(skb, 9);
+ *pos++ = WLAN_EID_VENDOR_SPECIFIC;
+ *pos++ = 7; /* len */
+ *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
+ *pos++ = 0x50;
+ *pos++ = 0xf2;
+ *pos++ = 2; /* WME */
+ *pos++ = 0; /* WME info */
+ *pos++ = 1; /* WME ver */
+ *pos++ = 0;
+ }
+
+ kfree(ifsta->assocreq_ies);
+ ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
+ ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
+ if (ifsta->assocreq_ies)
+ memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
+
+ ieee80211_sta_tx(dev, skb, 0, 0);
+}
+
+
+static void ieee80211_send_deauth(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta, u16 reason)
+{
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+
+ skb = dev_alloc_skb(sizeof(*mgmt));
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
+ "frame\n", dev->name);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_DEAUTH);
+ skb_put(skb, 2);
+ mgmt->u.deauth.reason_code = cpu_to_le16(reason);
+
+ ieee80211_sta_tx(dev, skb, 0, 0);
+}
+
+
+static void ieee80211_send_disassoc(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta, u16 reason)
+{
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+
+ skb = dev_alloc_skb(sizeof(*mgmt));
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
+ "frame\n", dev->name);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_DISASSOC);
+ skb_put(skb, 2);
+ mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
+
+ ieee80211_sta_tx(dev, skb, 0, 0);
+}
+
+
+static int ieee80211_privacy_mismatch(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_sta_bss *bss;
+ int res = 0;
+
+ if (!ifsta || ifsta->mixed_cell ||
+ ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
+ return 0;
+
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ if (!bss)
+ return 0;
+
+ if (ieee80211_sta_wep_configured(dev) !=
+ !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
+ res = 1;
+
+ ieee80211_rx_bss_put(dev, bss);
+
+ return res;
+}
+
+
+static void ieee80211_associate(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ ifsta->assoc_tries++;
+ if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
+ printk(KERN_DEBUG "%s: association with AP " MAC_FMT
+ " timed out\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+ return;
+ }
+
+ ifsta->state = IEEE80211_ASSOCIATE;
+ printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+ if (ieee80211_privacy_mismatch(dev, ifsta)) {
+ printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
+ "mixed-cell disabled - abort association\n", dev->name);
+ return;
+ }
+
+ ieee80211_send_assoc(dev, ifsta);
+
+ schedule_delayed_work(&ifsta->work, IEEE80211_ASSOC_TIMEOUT);
+}
+
+
+static void ieee80211_associated(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sta_info *sta;
+ int disassoc;
+
+ /* TODO: start monitoring current AP signal quality and number of
+ * missed beacons. Scan other channels every now and then and search
+ * for better APs. */
+ /* TODO: remove expired BSSes */
+
+ ifsta->state = IEEE80211_ASSOCIATED;
+
+ sta = sta_info_get(local, ifsta->bssid);
+ if (!sta) {
+ printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+ disassoc = 1;
+ } else {
+ disassoc = 0;
+ if (time_after(jiffies,
+ sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
+ if (ifsta->probereq_poll) {
+ printk(KERN_DEBUG "%s: No ProbeResp from "
+ "current AP " MAC_FMT " - assume out of "
+ "range\n",
+ dev->name, MAC_ARG(ifsta->bssid));
+ disassoc = 1;
+ sta_info_free(sta, 0);
+ ifsta->probereq_poll = 0;
+ } else {
+ ieee80211_send_probe_req(dev, ifsta->bssid,
+ local->scan_ssid,
+ local->scan_ssid_len);
+ ifsta->probereq_poll = 1;
+ }
+ } else {
+ ifsta->probereq_poll = 0;
+ if (time_after(jiffies, ifsta->last_probe +
+ IEEE80211_PROBE_INTERVAL)) {
+ ifsta->last_probe = jiffies;
+ ieee80211_send_probe_req(dev, ifsta->bssid,
+ ifsta->ssid,
+ ifsta->ssid_len);
+ }
+ }
+ sta_info_put(sta);
+ }
+ if (disassoc) {
+ union iwreq_data wrqu;
+ memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
+ wrqu.ap_addr.sa_family = ARPHRD_ETHER;
+ wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
+ schedule_delayed_work(&ifsta->work,
+ IEEE80211_MONITORING_INTERVAL + 30 * HZ);
+ } else {
+ schedule_delayed_work(&ifsta->work,
+ IEEE80211_MONITORING_INTERVAL);
+ }
+}
+
+
+static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
+ u8 *ssid, size_t ssid_len)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+ u8 *pos, *supp_rates, *esupp_rates = NULL;
+ int i;
+
+ skb = dev_alloc_skb(sizeof(*mgmt) + 200);
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
+ "request\n", dev->name);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_PROBE_REQ);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ if (dst) {
+ memcpy(mgmt->da, dst, ETH_ALEN);
+ memcpy(mgmt->bssid, dst, ETH_ALEN);
+ } else {
+ memset(mgmt->da, 0xff, ETH_ALEN);
+ memset(mgmt->bssid, 0xff, ETH_ALEN);
+ }
+ pos = skb_put(skb, 2 + ssid_len);
+ *pos++ = WLAN_EID_SSID;
+ *pos++ = ssid_len;
+ memcpy(pos, ssid, ssid_len);
+
+ supp_rates = skb_put(skb, 2);
+ supp_rates[0] = WLAN_EID_SUPP_RATES;
+ supp_rates[1] = 0;
+ for (i = 0; i < local->num_curr_rates; i++) {
+ struct ieee80211_rate *rate = &local->curr_rates[i];
+ if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
+ continue;
+ if (esupp_rates) {
+ pos = skb_put(skb, 1);
+ esupp_rates[1]++;
+ } else if (supp_rates[1] == 8) {
+ esupp_rates = skb_put(skb, 3);
+ esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
+ esupp_rates[1] = 1;
+ pos = &esupp_rates[2];
+ } else {
+ pos = skb_put(skb, 1);
+ supp_rates[1]++;
+ }
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ *pos = rate->rate / 10;
+ else
+ *pos = rate->rate / 5;
+ }
+
+ ieee80211_sta_tx(dev, skb, 0, 0);
+}
+
+
+static int ieee80211_sta_wep_configured(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (!sdata || !sdata->default_key ||
+ sdata->default_key->alg != ALG_WEP)
+ return 0;
+ return 1;
+}
+
+
+static void ieee80211_auth_completed(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ printk(KERN_DEBUG "%s: authenticated\n", dev->name);
+ ifsta->authenticated = 1;
+ ieee80211_associate(dev, ifsta);
+}
+
+
+static void ieee80211_auth_challenge(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ u8 *pos;
+ struct ieee802_11_elems elems;
+
+ printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
+ pos = mgmt->u.auth.variable;
+ if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
+ == ParseFailed) {
+ printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
+ dev->name);
+ return;
+ }
+ if (!elems.challenge) {
+ printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
+ "frame\n", dev->name);
+ return;
+ }
+ ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
+ elems.challenge_len + 2, 1);
+}
+
+
+static void ieee80211_rx_mgmt_auth(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ u16 auth_alg, auth_transaction, status_code;
+
+ if (ifsta->state != IEEE80211_AUTHENTICATE &&
+ sdata->type != IEEE80211_IF_TYPE_IBSS) {
+ printk(KERN_DEBUG "%s: authentication frame received from "
+ MAC_FMT ", but not in authenticate state - ignored\n",
+ dev->name, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (len < 24 + 6) {
+ printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
+ "received from " MAC_FMT " - ignored\n",
+ dev->name, len, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
+ printk(KERN_DEBUG "%s: authentication frame received from "
+ "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
+ "ignored\n", dev->name, MAC_ARG(mgmt->sa),
+ MAC_ARG(mgmt->bssid));
+ return;
+ }
+
+ if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
+ printk(KERN_DEBUG "%s: authentication frame received from "
+ "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
+ "ignored\n", dev->name, MAC_ARG(mgmt->sa),
+ MAC_ARG(mgmt->bssid));
+ return;
+ }
+
+ auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
+ auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
+ status_code = le16_to_cpu(mgmt->u.auth.status_code);
+
+ printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
+ "transaction=%d status=%d)\n",
+ dev->name, MAC_ARG(mgmt->sa), auth_alg,
+ auth_transaction, status_code);
+
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ /* IEEE 802.11 standard does not require authentication in IBSS
+ * networks and most implementations do not seem to use it.
+ * However, try to reply to authentication attempts if someone
+ * has actually implemented this.
+ * TODO: Could implement shared key authentication. */
+ if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
+ printk(KERN_DEBUG "%s: unexpected IBSS authentication "
+ "frame (alg=%d transaction=%d)\n",
+ dev->name, auth_alg, auth_transaction);
+ return;
+ }
+ ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
+ }
+
+ if (auth_alg != ifsta->auth_alg ||
+ auth_transaction != ifsta->auth_transaction) {
+ printk(KERN_DEBUG "%s: unexpected authentication frame "
+ "(alg=%d transaction=%d)\n",
+ dev->name, auth_alg, auth_transaction);
+ return;
+ }
+
+ if (status_code != WLAN_STATUS_SUCCESS) {
+ printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
+ "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
+ if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
+ u8 algs[3];
+ const int num_algs = ARRAY_SIZE(algs);
+ int i, pos;
+ algs[0] = algs[1] = algs[2] = 0xff;
+ if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
+ algs[0] = WLAN_AUTH_OPEN;
+ if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
+ algs[1] = WLAN_AUTH_SHARED_KEY;
+ if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
+ algs[2] = WLAN_AUTH_LEAP;
+ if (ifsta->auth_alg == WLAN_AUTH_OPEN)
+ pos = 0;
+ else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
+ pos = 1;
+ else
+ pos = 2;
+ for (i = 0; i < num_algs; i++) {
+ pos++;
+ if (pos >= num_algs)
+ pos = 0;
+ if (algs[pos] == ifsta->auth_alg ||
+ algs[pos] == 0xff)
+ continue;
+ if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
+ !ieee80211_sta_wep_configured(dev))
+ continue;
+ ifsta->auth_alg = algs[pos];
+ printk(KERN_DEBUG "%s: set auth_alg=%d for "
+ "next try\n",
+ dev->name, ifsta->auth_alg);
+ break;
+ }
+ }
+ return;
+ }
+
+ switch (ifsta->auth_alg) {
+ case WLAN_AUTH_OPEN:
+ case WLAN_AUTH_LEAP:
+ ieee80211_auth_completed(dev, ifsta);
+ break;
+ case WLAN_AUTH_SHARED_KEY:
+ if (ifsta->auth_transaction == 4)
+ ieee80211_auth_completed(dev, ifsta);
+ else
+ ieee80211_auth_challenge(dev, ifsta, mgmt, len,
+ rx_status);
+ break;
+ }
+}
+
+
+static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ u16 reason_code;
+
+ if (len < 24 + 2) {
+ printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
+ "received from " MAC_FMT " - ignored\n",
+ dev->name, len, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
+ printk(KERN_DEBUG "%s: deauthentication frame received from "
+ "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
+ "ignored\n", dev->name, MAC_ARG(mgmt->sa),
+ MAC_ARG(mgmt->bssid));
+ return;
+ }
+
+ reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
+
+ printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
+ " (reason=%d)\n",
+ dev->name, MAC_ARG(mgmt->sa), reason_code);
+
+ if (ifsta->authenticated) {
+ printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
+ }
+
+ if (ifsta->state == IEEE80211_AUTHENTICATE ||
+ ifsta->state == IEEE80211_ASSOCIATE ||
+ ifsta->state == IEEE80211_ASSOCIATED) {
+ ifsta->state = IEEE80211_AUTHENTICATE;
+ schedule_delayed_work(&ifsta->work,
+ IEEE80211_RETRY_AUTH_INTERVAL);
+ }
+
+ ieee80211_set_disassoc(dev, ifsta, 1);
+ ifsta->authenticated = 0;
+}
+
+
+static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ u16 reason_code;
+
+ if (len < 24 + 2) {
+ printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
+ "received from " MAC_FMT " - ignored\n",
+ dev->name, len, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
+ printk(KERN_DEBUG "%s: disassociation frame received from "
+ "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
+ "ignored\n", dev->name, MAC_ARG(mgmt->sa),
+ MAC_ARG(mgmt->bssid));
+ return;
+ }
+
+ reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
+
+ printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
+ " (reason=%d)\n",
+ dev->name, MAC_ARG(mgmt->sa), reason_code);
+
+ if (ifsta->associated)
+ printk(KERN_DEBUG "%s: disassociated\n", dev->name);
+
+ if (ifsta->state == IEEE80211_ASSOCIATED) {
+ ifsta->state = IEEE80211_ASSOCIATE;
+ schedule_delayed_work(&ifsta->work,
+ IEEE80211_RETRY_AUTH_INTERVAL);
+ }
+
+ ieee80211_set_disassoc(dev, ifsta, 0);
+}
+
+
+static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status,
+ int reassoc)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sta_info *sta;
+ u32 rates;
+ u16 capab_info, status_code, aid;
+ struct ieee802_11_elems elems;
+ u8 *pos;
+ int i, j;
+
+ /* AssocResp and ReassocResp have identical structure, so process both
+ * of them in this function. */
+
+ if (ifsta->state != IEEE80211_ASSOCIATE) {
+ printk(KERN_DEBUG "%s: association frame received from "
+ MAC_FMT ", but not in associate state - ignored\n",
+ dev->name, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (len < 24 + 6) {
+ printk(KERN_DEBUG "%s: too short (%zd) association frame "
+ "received from " MAC_FMT " - ignored\n",
+ dev->name, len, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
+ printk(KERN_DEBUG "%s: association frame received from "
+ "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
+ "ignored\n", dev->name, MAC_ARG(mgmt->sa),
+ MAC_ARG(mgmt->bssid));
+ return;
+ }
+
+ capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
+ status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
+ aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
+ if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
+ printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
+ "set\n", dev->name, aid);
+ aid &= ~(BIT(15) | BIT(14));
+
+ printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
+ "status=%d aid=%d)\n",
+ dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
+ capab_info, status_code, aid);
+
+ if (status_code != WLAN_STATUS_SUCCESS) {
+ printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
+ dev->name, status_code);
+ return;
+ }
+
+ pos = mgmt->u.assoc_resp.variable;
+ if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
+ == ParseFailed) {
+ printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
+ dev->name);
+ return;
+ }
+
+ if (!elems.supp_rates) {
+ printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
+ dev->name);
+ return;
+ }
+
+ printk(KERN_DEBUG "%s: associated\n", dev->name);
+ ifsta->aid = aid;
+ ifsta->ap_capab = capab_info;
+
+ kfree(ifsta->assocresp_ies);
+ ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
+ ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
+ if (ifsta->assocresp_ies)
+ memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
+
+ ieee80211_set_associated(dev, ifsta, 1);
+
+ /* Add STA entry for the AP */
+ sta = sta_info_get(local, ifsta->bssid);
+ if (!sta) {
+ sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
+ if (!sta) {
+ printk(KERN_DEBUG "%s: failed to add STA entry for the"
+ " AP\n", dev->name);
+ return;
+ }
+ }
+
+ sta->dev = dev;
+ sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
+ sta->assoc_ap = 1;
+
+ rates = 0;
+ for (i = 0; i < elems.supp_rates_len; i++) {
+ int rate = (elems.supp_rates[i] & 0x7f) * 5;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate *= 2;
+ for (j = 0; j < local->num_curr_rates; j++)
+ if (local->curr_rates[j].rate == rate)
+ rates |= BIT(j);
+ }
+ for (i = 0; i < elems.ext_supp_rates_len; i++) {
+ int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate *= 2;
+ for (j = 0; j < local->num_curr_rates; j++)
+ if (local->curr_rates[j].rate == rate)
+ rates |= BIT(j);
+ }
+ sta->supp_rates = rates;
+
+ rate_control_rate_init(sta, local);
+
+ if (elems.wmm_param && ifsta->wmm_enabled) {
+ sta->flags |= WLAN_STA_WME;
+ ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
+ elems.wmm_param_len);
+ }
+
+
+ sta_info_put(sta);
+
+ ieee80211_associated(dev, ifsta);
+}
+
+
+/* Caller must hold local->sta_bss_lock */
+static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
+ struct ieee80211_sta_bss *bss)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
+ local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
+}
+
+
+/* Caller must hold local->sta_bss_lock */
+static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
+ struct ieee80211_sta_bss *bss)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *b, *prev = NULL;
+ b = local->sta_bss_hash[STA_HASH(bss->bssid)];
+ while (b) {
+ if (b == bss) {
+ if (!prev)
+ local->sta_bss_hash[STA_HASH(bss->bssid)] =
+ bss->hnext;
+ else
+ prev->hnext = bss->hnext;
+ break;
+ }
+ prev = b;
+ b = b->hnext;
+ }
+}
+
+
+static struct ieee80211_sta_bss *
+ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *bss;
+
+ bss = kmalloc(sizeof(*bss), GFP_ATOMIC);
+ if (!bss)
+ return NULL;
+ memset(bss, 0, sizeof(*bss));
+ atomic_inc(&bss->users);
+ atomic_inc(&bss->users);
+ memcpy(bss->bssid, bssid, ETH_ALEN);
+
+ spin_lock_bh(&local->sta_bss_lock);
+ /* TODO: order by RSSI? */
+ list_add_tail(&bss->list, &local->sta_bss_list);
+ __ieee80211_rx_bss_hash_add(dev, bss);
+ spin_unlock_bh(&local->sta_bss_lock);
+ return bss;
+}
+
+
+static struct ieee80211_sta_bss *
+ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *bss;
+
+ spin_lock_bh(&local->sta_bss_lock);
+ bss = local->sta_bss_hash[STA_HASH(bssid)];
+ while (bss) {
+ if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
+ atomic_inc(&bss->users);
+ break;
+ }
+ bss = bss->hnext;
+ }
+ spin_unlock_bh(&local->sta_bss_lock);
+ return bss;
+}
+
+
+static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
+{
+ kfree(bss->wpa_ie);
+ kfree(bss->rsn_ie);
+ kfree(bss->wmm_ie);
+ kfree(bss);
+}
+
+
+static void ieee80211_rx_bss_put(struct net_device *dev,
+ struct ieee80211_sta_bss *bss)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ if (!atomic_dec_and_test(&bss->users))
+ return;
+
+ spin_lock_bh(&local->sta_bss_lock);
+ __ieee80211_rx_bss_hash_del(dev, bss);
+ list_del(&bss->list);
+ spin_unlock_bh(&local->sta_bss_lock);
+ ieee80211_rx_bss_free(bss);
+}
+
+
+void ieee80211_rx_bss_list_init(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ spin_lock_init(&local->sta_bss_lock);
+ INIT_LIST_HEAD(&local->sta_bss_list);
+}
+
+
+void ieee80211_rx_bss_list_deinit(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *bss, *tmp;
+
+ list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
+ ieee80211_rx_bss_put(dev, bss);
+}
+
+
+static void ieee80211_rx_bss_info(struct net_device *dev,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status,
+ int beacon)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee802_11_elems elems;
+ size_t baselen;
+ int channel, invalid = 0, clen;
+ struct ieee80211_sta_bss *bss;
+ struct sta_info *sta;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ u64 timestamp;
+
+ if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
+ return; /* ignore ProbeResp to foreign address */
+
+#if 0
+ printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
+ dev->name, beacon ? "Beacon" : "Probe Response",
+ MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
+#endif
+
+ baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
+ if (baselen > len)
+ return;
+
+ timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
+
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
+ memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ static unsigned long last_tsf_debug = 0;
+ u64 tsf;
+ if (local->ops->get_tsf)
+ tsf = local->ops->get_tsf(local->mdev);
+ else
+ tsf = -1LLU;
+ if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
+ printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
+ MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
+ "@%ld\n",
+ MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
+ tsf, timestamp, tsf - timestamp, jiffies);
+ last_tsf_debug = jiffies;
+ }
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+ }
+
+ if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
+ &elems) == ParseFailed)
+ invalid = 1;
+
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
+ memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
+ (sta = sta_info_get(local, mgmt->sa))) {
+ struct ieee80211_rate *rates;
+ size_t num_rates;
+ u32 supp_rates, prev_rates;
+ int i, j, oper_mode;
+
+ rates = local->curr_rates;
+ num_rates = local->num_curr_rates;
+ oper_mode = local->sta_scanning ? local->scan_oper_phymode :
+ local->hw.conf.phymode;
+ for (i = 0; i < local->hw.num_modes; i++) {
+ struct ieee80211_hw_modes *mode = &local->hw.modes[i];
+ if (oper_mode == mode->mode) {
+ rates = mode->rates;
+ num_rates = mode->num_rates;
+ break;
+ }
+ }
+
+ supp_rates = 0;
+ for (i = 0; i < elems.supp_rates_len +
+ elems.ext_supp_rates_len; i++) {
+ u8 rate = 0;
+ int own_rate;
+ if (i < elems.supp_rates_len)
+ rate = elems.supp_rates[i];
+ else if (elems.ext_supp_rates)
+ rate = elems.ext_supp_rates
+ [i - elems.supp_rates_len];
+ own_rate = 5 * (rate & 0x7f);
+ if (oper_mode == MODE_ATHEROS_TURBO)
+ own_rate *= 2;
+ for (j = 0; j < num_rates; j++)
+ if (rates[j].rate == own_rate)
+ supp_rates |= BIT(j);
+ }
+
+ prev_rates = sta->supp_rates;
+ sta->supp_rates &= supp_rates;
+ if (sta->supp_rates == 0) {
+ /* No matching rates - this should not really happen.
+ * Make sure that at least one rate is marked
+ * supported to avoid issues with TX rate ctrl. */
+ sta->supp_rates = sdata->u.sta.supp_rates_bits;
+ }
+ if (sta->supp_rates != prev_rates) {
+ printk(KERN_DEBUG "%s: updated supp_rates set for "
+ MAC_FMT " based on beacon info (0x%x & 0x%x -> "
+ "0x%x)\n",
+ dev->name, MAC_ARG(sta->addr), prev_rates,
+ supp_rates, sta->supp_rates);
+ }
+ sta_info_put(sta);
+ }
+
+ if (!elems.ssid)
+ return;
+
+ if (elems.ds_params && elems.ds_params_len == 1)
+ channel = elems.ds_params[0];
+ else
+ channel = rx_status->channel;
+
+ bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
+ if (!bss) {
+ bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
+ if (!bss)
+ return;
+ } else {
+#if 0
+ /* TODO: order by RSSI? */
+ spin_lock_bh(&local->sta_bss_lock);
+ list_move_tail(&bss->list, &local->sta_bss_list);
+ spin_unlock_bh(&local->sta_bss_lock);
+#endif
+ }
+
+ if (bss->probe_resp && beacon) {
+ /* Do not allow beacon to override data from Probe Response. */
+ ieee80211_rx_bss_put(dev, bss);
+ return;
+ }
+
+ bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
+ bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
+ if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
+ memcpy(bss->ssid, elems.ssid, elems.ssid_len);
+ bss->ssid_len = elems.ssid_len;
+ }
+
+ bss->supp_rates_len = 0;
+ if (elems.supp_rates) {
+ clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
+ if (clen > elems.supp_rates_len)
+ clen = elems.supp_rates_len;
+ memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
+ clen);
+ bss->supp_rates_len += clen;
+ }
+ if (elems.ext_supp_rates) {
+ clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
+ if (clen > elems.ext_supp_rates_len)
+ clen = elems.ext_supp_rates_len;
+ memcpy(&bss->supp_rates[bss->supp_rates_len],
+ elems.ext_supp_rates, clen);
+ bss->supp_rates_len += clen;
+ }
+
+ if (elems.wpa &&
+ (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
+ memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
+ kfree(bss->wpa_ie);
+ bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
+ if (bss->wpa_ie) {
+ memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
+ bss->wpa_ie_len = elems.wpa_len + 2;
+ } else
+ bss->wpa_ie_len = 0;
+ } else if (!elems.wpa && bss->wpa_ie) {
+ kfree(bss->wpa_ie);
+ bss->wpa_ie = NULL;
+ bss->wpa_ie_len = 0;
+ }
+
+ if (elems.rsn &&
+ (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
+ memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
+ kfree(bss->rsn_ie);
+ bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
+ if (bss->rsn_ie) {
+ memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
+ bss->rsn_ie_len = elems.rsn_len + 2;
+ } else
+ bss->rsn_ie_len = 0;
+ } else if (!elems.rsn && bss->rsn_ie) {
+ kfree(bss->rsn_ie);
+ bss->rsn_ie = NULL;
+ bss->rsn_ie_len = 0;
+ }
+
+ if (elems.wmm_param &&
+ (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
+ memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
+ kfree(bss->wmm_ie);
+ bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
+ if (bss->wmm_ie) {
+ memcpy(bss->wmm_ie, elems.wmm_param - 2,
+ elems.wmm_param_len + 2);
+ bss->wmm_ie_len = elems.wmm_param_len + 2;
+ } else
+ bss->wmm_ie_len = 0;
+ } else if (!elems.wmm_param && bss->wmm_ie) {
+ kfree(bss->wmm_ie);
+ bss->wmm_ie = NULL;
+ bss->wmm_ie_len = 0;
+ }
+
+
+ bss->hw_mode = rx_status->phymode;
+ bss->channel = channel;
+ bss->freq = rx_status->freq;
+ if (channel != rx_status->channel &&
+ (bss->hw_mode == MODE_IEEE80211G ||
+ bss->hw_mode == MODE_IEEE80211B) &&
+ channel >= 1 && channel <= 14) {
+ static const int freq_list[] = {
+ 2412, 2417, 2422, 2427, 2432, 2437, 2442,
+ 2447, 2452, 2457, 2462, 2467, 2472, 2484
+ };
+ /* IEEE 802.11g/b mode can receive packets from neighboring
+ * channels, so map the channel into frequency. */
+ bss->freq = freq_list[channel - 1];
+ }
+ bss->timestamp = timestamp;
+ bss->last_update = jiffies;
+ bss->rssi = rx_status->ssi;
+ if (!beacon)
+ bss->probe_resp++;
+ ieee80211_rx_bss_put(dev, bss);
+}
+
+
+static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
+}
+
+
+static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_sta *ifsta;
+ int use_protection;
+ size_t baselen;
+ struct ieee802_11_elems elems;
+
+ ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (sdata->type != IEEE80211_IF_TYPE_STA)
+ return;
+ ifsta = &sdata->u.sta;
+
+ if (!ifsta->associated ||
+ memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
+ return;
+
+ /* Process beacon from the current BSS */
+ baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
+ if (baselen > len)
+ return;
+
+ if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
+ &elems) == ParseFailed)
+ return;
+
+ use_protection = 0;
+ if (elems.erp_info && elems.erp_info_len >= 1) {
+ use_protection =
+ (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0;
+ }
+
+ if (use_protection != !!ifsta->use_protection) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
+ MAC_FMT ")\n",
+ dev->name,
+ use_protection ? "enabled" : "disabled",
+ MAC_ARG(ifsta->bssid));
+ }
+ ifsta->use_protection = use_protection ? 1 : 0;
+ local->cts_protect_erp_frames = use_protection;
+ }
+
+ if (elems.wmm_param && ifsta->wmm_enabled) {
+ ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
+ elems.wmm_param_len);
+ }
+}
+
+
+static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len,
+ struct ieee80211_rx_status *rx_status)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ int tx_last_beacon;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *resp;
+ u8 *pos, *end;
+
+ if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
+ ifsta->state != IEEE80211_IBSS_JOINED ||
+ len < 24 + 2 || !ifsta->probe_resp)
+ return;
+
+ if (local->ops->tx_last_beacon)
+ tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
+ else
+ tx_last_beacon = 1;
+
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
+ MAC_FMT " (tx_last_beacon=%d)\n",
+ dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
+ MAC_ARG(mgmt->bssid), tx_last_beacon);
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+
+ if (!tx_last_beacon)
+ return;
+
+ if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
+ memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
+ return;
+
+ end = ((u8 *) mgmt) + len;
+ pos = mgmt->u.probe_req.variable;
+ if (pos[0] != WLAN_EID_SSID ||
+ pos + 2 + pos[1] > end) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
+ "from " MAC_FMT "\n",
+ dev->name, MAC_ARG(mgmt->sa));
+ }
+ return;
+ }
+ if (pos[1] != 0 &&
+ (pos[1] != ifsta->ssid_len ||
+ memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
+ /* Ignore ProbeReq for foreign SSID */
+ return;
+ }
+
+ /* Reply with ProbeResp */
+ skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
+ if (!skb)
+ return;
+
+ resp = (struct ieee80211_mgmt *) skb->data;
+ memcpy(resp->da, mgmt->sa, ETH_ALEN);
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
+ dev->name, MAC_ARG(resp->da));
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+ ieee80211_sta_tx(dev, skb, 0, 1);
+}
+
+
+void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
+ struct ieee80211_rx_status *rx_status)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_sta *ifsta;
+ struct ieee80211_mgmt *mgmt;
+ u16 fc;
+
+ if (skb->len < 24)
+ goto fail;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ ifsta = &sdata->u.sta;
+
+ mgmt = (struct ieee80211_mgmt *) skb->data;
+ fc = le16_to_cpu(mgmt->frame_control);
+
+ switch (fc & IEEE80211_FCTL_STYPE) {
+ case IEEE80211_STYPE_PROBE_REQ:
+ ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
+ rx_status);
+ break;
+ case IEEE80211_STYPE_PROBE_RESP:
+ ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
+ break;
+ case IEEE80211_STYPE_BEACON:
+ ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
+ break;
+ case IEEE80211_STYPE_AUTH:
+ ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len, rx_status);
+ break;
+ case IEEE80211_STYPE_ASSOC_RESP:
+ ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len,
+ rx_status, 0);
+ break;
+ case IEEE80211_STYPE_REASSOC_RESP:
+ ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len,
+ rx_status, 1);
+ break;
+ case IEEE80211_STYPE_DEAUTH:
+ ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len,
+ rx_status);
+ break;
+ case IEEE80211_STYPE_DISASSOC:
+ ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len,
+ rx_status);
+ break;
+ default:
+ printk(KERN_DEBUG "%s: received unknown management frame - "
+ "stype=%d\n", dev->name,
+ (fc & IEEE80211_FCTL_STYPE) >> 4);
+ break;
+ }
+
+ fail:
+ dev_kfree_skb(skb);
+}
+
+
+void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
+ struct ieee80211_rx_status *rx_status)
+{
+ struct ieee80211_mgmt *mgmt;
+ u16 fc;
+
+ if (skb->len < 24) {
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb->data;
+ fc = le16_to_cpu(mgmt->frame_control);
+
+ if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
+ if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
+ ieee80211_rx_mgmt_probe_resp(dev, mgmt,
+ skb->len, rx_status);
+ } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
+ ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
+ rx_status);
+ }
+ }
+
+ dev_kfree_skb(skb);
+}
+
+
+static int ieee80211_sta_active_ibss(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ int active = 0;
+ struct sta_info *sta;
+
+ spin_lock_bh(&local->sta_lock);
+ list_for_each_entry(sta, &local->sta_list, list) {
+ if (sta->dev == dev &&
+ time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
+ jiffies)) {
+ active++;
+ break;
+ }
+ }
+ spin_unlock_bh(&local->sta_lock);
+
+ return active;
+}
+
+
+static void ieee80211_sta_expire(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sta_info *sta, *tmp;
+
+ spin_lock_bh(&local->sta_lock);
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
+ if (time_after(jiffies, sta->last_rx +
+ IEEE80211_IBSS_INACTIVITY_LIMIT)) {
+ printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
+ "\n", dev->name, MAC_ARG(sta->addr));
+ sta_info_free(sta, 1);
+ }
+ spin_unlock_bh(&local->sta_lock);
+}
+
+
+static void ieee80211_sta_merge_ibss(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ schedule_delayed_work(&ifsta->work, IEEE80211_IBSS_MERGE_INTERVAL);
+
+ ieee80211_sta_expire(dev);
+ if (ieee80211_sta_active_ibss(dev))
+ return;
+
+ printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
+ "IBSS networks with same SSID (merge)\n", dev->name);
+ ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
+}
+
+
+void ieee80211_sta_work(void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_sta *ifsta;
+
+ if (!netif_running(dev))
+ return;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (sdata->type != IEEE80211_IF_TYPE_STA &&
+ sdata->type != IEEE80211_IF_TYPE_IBSS) {
+ printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
+ "(type=%d)\n", dev->name, sdata->type);
+ return;
+ }
+ ifsta = &sdata->u.sta;
+
+ switch (ifsta->state) {
+ case IEEE80211_DISABLED:
+ break;
+ case IEEE80211_AUTHENTICATE:
+ ieee80211_authenticate(dev, ifsta);
+ break;
+ case IEEE80211_ASSOCIATE:
+ ieee80211_associate(dev, ifsta);
+ break;
+ case IEEE80211_ASSOCIATED:
+ ieee80211_associated(dev, ifsta);
+ break;
+ case IEEE80211_IBSS_SEARCH:
+ ieee80211_sta_find_ibss(dev, ifsta);
+ break;
+ case IEEE80211_IBSS_JOINED:
+ ieee80211_sta_merge_ibss(dev, ifsta);
+ break;
+ default:
+ printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
+ ifsta->state);
+ break;
+ }
+
+ if (ieee80211_privacy_mismatch(dev, ifsta)) {
+ printk(KERN_DEBUG "%s: privacy configuration mismatch and "
+ "mixed-cell disabled - disassociate\n", dev->name);
+
+ ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
+ ieee80211_set_disassoc(dev, ifsta, 0);
+ }
+}
+
+
+static void ieee80211_sta_new_auth(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (sdata->type != IEEE80211_IF_TYPE_STA)
+ return;
+
+ if (local->ops->reset_tsf) {
+ /* Reset own TSF to allow time synchronization work. */
+ local->ops->reset_tsf(local_to_hw(local));
+ }
+
+ ifsta->wmm_last_param_set = -1; /* allow any WMM update */
+
+
+ if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
+ ifsta->auth_alg = WLAN_AUTH_OPEN;
+ else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
+ ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
+ else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
+ ifsta->auth_alg = WLAN_AUTH_LEAP;
+ else
+ ifsta->auth_alg = WLAN_AUTH_OPEN;
+ printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
+ ifsta->auth_alg);
+ ifsta->auth_transaction = -1;
+ ifsta->auth_tries = ifsta->assoc_tries = 0;
+ ieee80211_authenticate(dev, ifsta);
+}
+
+
+static int ieee80211_ibss_allowed(struct ieee80211_local *local)
+{
+ int m, c;
+
+ for (m = 0; m < local->hw.num_modes; m++) {
+ struct ieee80211_hw_modes *mode = &local->hw.modes[m];
+ if (mode->mode != local->hw.conf.phymode)
+ continue;
+ for (c = 0; c < mode->num_channels; c++) {
+ struct ieee80211_channel *chan = &mode->channels[c];
+ if (chan->flag & IEEE80211_CHAN_W_SCAN &&
+ chan->chan == local->hw.conf.channel) {
+ if (chan->flag & IEEE80211_CHAN_W_IBSS)
+ return 1;
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+extern int ieee80211_ioctl_siwfreq(struct net_device *dev,
+ struct iw_request_info *info,
+ struct iw_freq *freq, char *extra);
+
+static int ieee80211_sta_join_ibss(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_sta_bss *bss)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct iw_freq rq;
+ int res, rates, i, j;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+ struct ieee80211_tx_control control;
+ struct ieee80211_rate *rate;
+ struct rate_control_extra extra;
+ u8 *pos;
+ struct ieee80211_sub_if_data *sdata;
+
+ /* Remove possible STA entries from other IBSS networks. */
+ sta_info_flush(local, NULL);
+
+ if (local->ops->reset_tsf) {
+ /* Reset own TSF to allow time synchronization work. */
+ local->ops->reset_tsf(local_to_hw(local));
+ }
+ memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
+ res = ieee80211_if_config(dev);
+ if (res)
+ return res;
+
+ local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ sdata->drop_unencrypted = bss->capability &
+ WLAN_CAPABILITY_PRIVACY ? 1 : 0;
+
+ memset(&rq, 0, sizeof(rq));
+ rq.m = bss->freq * 100000;
+ rq.e = 1;
+ res = ieee80211_ioctl_siwfreq(dev, NULL, &rq, NULL);
+
+ if (!ieee80211_ibss_allowed(local)) {
+ printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
+ "(%d MHz)\n", dev->name, local->hw.conf.channel,
+ local->hw.conf.freq);
+ return -1;
+ }
+
+ /* Set beacon template based on scan results */
+ skb = dev_alloc_skb(400);
+ do {
+ if (!skb)
+ break;
+
+ mgmt = (struct ieee80211_mgmt *)
+ skb_put(skb, 24 + sizeof(mgmt->u.beacon));
+ memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_BEACON);
+ memset(mgmt->da, 0xff, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+ mgmt->u.beacon.beacon_int =
+ cpu_to_le16(local->hw.conf.beacon_int);
+ mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
+
+ pos = skb_put(skb, 2 + ifsta->ssid_len);
+ *pos++ = WLAN_EID_SSID;
+ *pos++ = ifsta->ssid_len;
+ memcpy(pos, ifsta->ssid, ifsta->ssid_len);
+
+ rates = bss->supp_rates_len;
+ if (rates > 8)
+ rates = 8;
+ pos = skb_put(skb, 2 + rates);
+ *pos++ = WLAN_EID_SUPP_RATES;
+ *pos++ = rates;
+ memcpy(pos, bss->supp_rates, rates);
+
+ pos = skb_put(skb, 2 + 1);
+ *pos++ = WLAN_EID_DS_PARAMS;
+ *pos++ = 1;
+ *pos++ = bss->channel;
+
+ pos = skb_put(skb, 2 + 2);
+ *pos++ = WLAN_EID_IBSS_PARAMS;
+ *pos++ = 2;
+ /* FIX: set ATIM window based on scan results */
+ *pos++ = 0;
+ *pos++ = 0;
+
+ if (bss->supp_rates_len > 8) {
+ rates = bss->supp_rates_len - 8;
+ pos = skb_put(skb, 2 + rates);
+ *pos++ = WLAN_EID_EXT_SUPP_RATES;
+ *pos++ = rates;
+ memcpy(pos, &bss->supp_rates[8], rates);
+ }
+
+ memset(&control, 0, sizeof(control));
+ control.pkt_type = PKT_PROBE_RESP;
+ memset(&extra, 0, sizeof(extra));
+ extra.endidx = local->num_curr_rates;
+ rate = rate_control_get_rate(local, dev, skb, &extra);
+ if (!rate) {
+ printk(KERN_DEBUG "%s: Failed to determine TX rate "
+ "for IBSS beacon\n", dev->name);
+ break;
+ }
+ control.tx_rate = (local->short_preamble &&
+ (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
+ rate->val2 : rate->val;
+ control.antenna_sel = local->hw.conf.antenna_sel;
+ control.power_level = local->hw.conf.power_level;
+ control.flags |= IEEE80211_TXCTL_NO_ACK;
+ control.retry_limit = 1;
+ control.rts_cts_duration = 0;
+
+ ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
+ if (ifsta->probe_resp) {
+ mgmt = (struct ieee80211_mgmt *)
+ ifsta->probe_resp->data;
+ mgmt->frame_control =
+ IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_PROBE_RESP);
+ } else {
+ printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
+ "template for IBSS\n", dev->name);
+ }
+
+ if (local->ops->beacon_update &&
+ local->ops->beacon_update(local_to_hw(local),
+ skb, &control) == 0) {
+ printk(KERN_DEBUG "%s: Configured IBSS beacon "
+ "template based on scan results\n", dev->name);
+ skb = NULL;
+ }
+
+ rates = 0;
+ for (i = 0; i < bss->supp_rates_len; i++) {
+ int rate = (bss->supp_rates[i] & 0x7f) * 5;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate *= 2;
+ for (j = 0; j < local->num_curr_rates; j++)
+ if (local->curr_rates[j].rate == rate)
+ rates |= BIT(j);
+ }
+ ifsta->supp_rates_bits = rates;
+ } while (0);
+
+ if (skb) {
+ printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
+ "template\n", dev->name);
+ dev_kfree_skb(skb);
+ }
+
+ ifsta->state = IEEE80211_IBSS_JOINED;
+ schedule_delayed_work(&ifsta->work, IEEE80211_IBSS_MERGE_INTERVAL);
+
+ ieee80211_rx_bss_put(dev, bss);
+
+ return res;
+}
+
+
+static int ieee80211_sta_create_ibss(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *bss;
+ struct ieee80211_sub_if_data *sdata;
+ u8 bssid[ETH_ALEN], *pos;
+ int i;
+
+#if 0
+ /* Easier testing, use fixed BSSID. */
+ memset(bssid, 0xfe, ETH_ALEN);
+#else
+ /* Generate random, not broadcast, locally administered BSSID. Mix in
+ * own MAC address to make sure that devices that do not have proper
+ * random number generator get different BSSID. */
+ get_random_bytes(bssid, ETH_ALEN);
+ for (i = 0; i < ETH_ALEN; i++)
+ bssid[i] ^= dev->dev_addr[i];
+ bssid[0] &= ~0x01;
+ bssid[0] |= 0x02;
+#endif
+
+ printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
+ dev->name, MAC_ARG(bssid));
+
+ bss = ieee80211_rx_bss_add(dev, bssid);
+ if (!bss)
+ return -ENOMEM;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (local->hw.conf.beacon_int == 0)
+ local->hw.conf.beacon_int = 100;
+ bss->beacon_int = local->hw.conf.beacon_int;
+ bss->hw_mode = local->hw.conf.phymode;
+ bss->channel = local->hw.conf.channel;
+ bss->freq = local->hw.conf.freq;
+ bss->last_update = jiffies;
+ bss->capability = WLAN_CAPABILITY_IBSS;
+ if (sdata->default_key) {
+ bss->capability |= WLAN_CAPABILITY_PRIVACY;
+ } else
+ sdata->drop_unencrypted = 0;
+ bss->supp_rates_len = local->num_curr_rates;
+ pos = bss->supp_rates;
+ for (i = 0; i < local->num_curr_rates; i++) {
+ int rate = local->curr_rates[i].rate;
+ if (local->hw.conf.phymode == MODE_ATHEROS_TURBO)
+ rate /= 2;
+ *pos++ = (u8) (rate / 5);
+ }
+
+ return ieee80211_sta_join_ibss(dev, ifsta, bss);
+}
+
+
+static int ieee80211_sta_find_ibss(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sta_bss *bss;
+ int found = 0;
+ u8 bssid[ETH_ALEN];
+ int active_ibss;
+
+ if (ifsta->ssid_len == 0)
+ return -EINVAL;
+
+ active_ibss = ieee80211_sta_active_ibss(dev);
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
+ dev->name, active_ibss);
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+ spin_lock_bh(&local->sta_bss_lock);
+ list_for_each_entry(bss, &local->sta_bss_list, list) {
+ if (ifsta->ssid_len != bss->ssid_len ||
+ memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
+ || !(bss->capability & WLAN_CAPABILITY_IBSS))
+ continue;
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
+ MAC_ARG(bss->bssid));
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+ memcpy(bssid, bss->bssid, ETH_ALEN);
+ found = 1;
+ if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
+ break;
+ }
+ spin_unlock_bh(&local->sta_bss_lock);
+
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
+ MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+ if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
+ (bss = ieee80211_rx_bss_get(dev, bssid))) {
+ printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
+ " based on configured SSID\n",
+ dev->name, MAC_ARG(bssid));
+ return ieee80211_sta_join_ibss(dev, ifsta, bss);
+ }
+#ifdef CONFIG_D80211_IBSS_DEBUG
+ printk(KERN_DEBUG " did not try to join ibss\n");
+#endif /* CONFIG_D80211_IBSS_DEBUG */
+
+ /* Selected IBSS not found in current scan results - try to scan */
+ if (ifsta->state == IEEE80211_IBSS_JOINED &&
+ !ieee80211_sta_active_ibss(dev)) {
+ schedule_delayed_work(&ifsta->work,
+ IEEE80211_IBSS_MERGE_INTERVAL);
+ } else if (time_after(jiffies, local->last_scan_completed +
+ IEEE80211_SCAN_INTERVAL)) {
+ printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
+ "join\n", dev->name);
+ return ieee80211_sta_req_scan(dev, ifsta->ssid,
+ ifsta->ssid_len);
+ } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
+ int interval = IEEE80211_SCAN_INTERVAL;
+
+ if (time_after(jiffies, ifsta->ibss_join_req +
+ IEEE80211_IBSS_JOIN_TIMEOUT)) {
+ if (ifsta->create_ibss &&
+ ieee80211_ibss_allowed(local))
+ return ieee80211_sta_create_ibss(dev, ifsta);
+ if (ifsta->create_ibss) {
+ printk(KERN_DEBUG "%s: IBSS not allowed on the"
+ " configured channel %d (%d MHz)\n",
+ dev->name, local->hw.conf.channel,
+ local->hw.conf.freq);
+ }
+
+ /* No IBSS found - decrease scan interval and continue
+ * scanning. */
+ interval = IEEE80211_SCAN_INTERVAL_SLOW;
+ }
+
+ ifsta->state = IEEE80211_IBSS_SEARCH;
+ schedule_delayed_work(&ifsta->work, interval);
+ return 0;
+ }
+
+ return 0;
+}
+
+
+int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_sta *ifsta;
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+
+ if (len > IEEE80211_MAX_SSID_LEN)
+ return -EINVAL;
+
+ /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
+ * not defined. */
+ if (local->ops->conf_tx) {
+ struct ieee80211_tx_queue_params qparam;
+ int i;
+
+ memset(&qparam, 0, sizeof(qparam));
+ /* TODO: are these ok defaults for all hw_modes? */
+ qparam.aifs = 2;
+ qparam.cw_min =
+ local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
+ qparam.cw_max = 1023;
+ qparam.burst_time = 0;
+ for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
+ {
+ local->ops->conf_tx(local_to_hw(local),
+ i + IEEE80211_TX_QUEUE_DATA0,
+ &qparam);
+ }
+ /* IBSS uses different parameters for Beacon sending */
+ qparam.cw_min++;
+ qparam.cw_min *= 2;
+ qparam.cw_min--;
+ local->ops->conf_tx(local_to_hw(local),
+ IEEE80211_TX_QUEUE_BEACON, &qparam);
+ }
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ ifsta = &sdata->u.sta;
+
+ if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
+ ifsta->prev_bssid_set = 0;
+ memcpy(ifsta->ssid, ssid, len);
+ memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
+ ifsta->ssid_len = len;
+
+ ifsta->ssid_set = 1;
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
+ ifsta->ibss_join_req = jiffies;
+ ifsta->state = IEEE80211_IBSS_SEARCH;
+ return ieee80211_sta_find_ibss(dev, ifsta);
+ }
+
+ if (ifsta->bssid_set && ifsta->state != IEEE80211_AUTHENTICATE)
+ ieee80211_sta_new_auth(dev, ifsta);
+
+ return 0;
+}
+
+
+int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+ memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
+ *len = ifsta->ssid_len;
+ return 0;
+}
+
+
+int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_sta *ifsta;
+ int res;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ ifsta = &sdata->u.sta;
+
+ if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
+ memcpy(ifsta->bssid, bssid, ETH_ALEN);
+ res = ieee80211_if_config(dev);
+ if (res) {
+ printk(KERN_DEBUG "%s: Failed to config new BSSID to "
+ "the low-level driver\n", dev->name);
+ return res;
+ }
+ }
+
+ if (memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
+ ifsta->bssid_set = 0;
+ else
+ ifsta->bssid_set = 1;
+ if (ifsta->ssid_set)
+ ieee80211_sta_new_auth(dev, ifsta);
+
+ return 0;
+}
+
+
+static void ieee80211_sta_save_oper_chan(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ local->scan_oper_channel = local->hw.conf.channel;
+ local->scan_oper_channel_val = local->hw.conf.channel_val;
+ local->scan_oper_power_level = local->hw.conf.power_level;
+ local->scan_oper_freq = local->hw.conf.freq;
+ local->scan_oper_phymode = local->hw.conf.phymode;
+ local->scan_oper_antenna_max = local->hw.conf.antenna_max;
+}
+
+
+static int ieee80211_sta_restore_oper_chan(struct net_device *dev)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ local->hw.conf.channel = local->scan_oper_channel;
+ local->hw.conf.channel_val = local->scan_oper_channel_val;
+ local->hw.conf.power_level = local->scan_oper_power_level;
+ local->hw.conf.freq = local->scan_oper_freq;
+ local->hw.conf.phymode = local->scan_oper_phymode;
+ local->hw.conf.antenna_max = local->scan_oper_antenna_max;
+ return ieee80211_hw_config(local);
+}
+
+
+static int ieee80211_active_scan(struct ieee80211_local *local)
+{
+ int m, c;
+
+ for (m = 0; m < local->hw.num_modes; m++) {
+ struct ieee80211_hw_modes *mode = &local->hw.modes[m];
+ if (mode->mode != local->hw.conf.phymode)
+ continue;
+ for (c = 0; c < mode->num_channels; c++) {
+ struct ieee80211_channel *chan = &mode->channels[c];
+ if (chan->flag & IEEE80211_CHAN_W_SCAN &&
+ chan->chan == local->hw.conf.channel) {
+ if (chan->flag & IEEE80211_CHAN_W_ACTIVE_SCAN)
+ return 1;
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+void ieee80211_scan_completed(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct net_device *dev = local->scan_work.data;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ union iwreq_data wrqu;
+
+ printk(KERN_DEBUG "%s: scan completed\n", dev->name);
+ local->sta_scanning = 0;
+ local->last_scan_completed = jiffies;
+
+ memset(&wrqu, 0, sizeof(wrqu));
+ wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
+
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+ if (!ifsta->bssid_set ||
+ (!ifsta->state == IEEE80211_IBSS_JOINED &&
+ !ieee80211_sta_active_ibss(dev)))
+ ieee80211_sta_find_ibss(dev, ifsta);
+ }
+}
+EXPORT_SYMBOL(ieee80211_scan_completed);
+
+static void ieee80211_sta_scan_work(void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_hw_modes *mode;
+ struct ieee80211_channel *chan;
+ int skip;
+ unsigned long next_delay = 0;
+
+ if (!local->sta_scanning)
+ return;
+
+ switch (local->scan_state) {
+ case SCAN_SET_CHANNEL:
+ mode = &local->hw.modes[local->scan_hw_mode_idx];
+ if (local->scan_hw_mode_idx >= local->hw.num_modes ||
+ (local->scan_hw_mode_idx + 1 == local->hw.num_modes &&
+ local->scan_channel_idx >= mode->num_channels)) {
+ if (ieee80211_sta_restore_oper_chan(dev)) {
+ printk(KERN_DEBUG "%s: failed to restore "
+ "operational channel after scan\n",
+ dev->name);
+ }
+
+ ieee80211_scan_completed(local_to_hw(local));
+ return;
+ }
+ skip = !(local->enabled_modes & (1 << mode->mode));
+ chan = &mode->channels[local->scan_channel_idx];
+ if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
+ (sdata->type == IEEE80211_IF_TYPE_IBSS &&
+ !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
+ (local->hw_modes & local->enabled_modes &
+ (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
+ skip = 1;
+
+ if (!skip) {
+#if 0
+ printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
+ dev->name, chan->chan, chan->freq);
+#endif
+
+ local->hw.conf.channel = chan->chan;
+ local->hw.conf.channel_val = chan->val;
+ local->hw.conf.power_level = chan->power_level;
+ local->hw.conf.freq = chan->freq;
+ local->hw.conf.phymode = mode->mode;
+ local->hw.conf.antenna_max = chan->antenna_max;
+ if (ieee80211_hw_config(local)) {
+ printk(KERN_DEBUG "%s: failed to set channel "
+ "%d (%d MHz) for scan\n", dev->name,
+ chan->chan, chan->freq);
+ skip = 1;
+ }
+ }
+
+ local->scan_channel_idx++;
+ if (local->scan_channel_idx >=
+ local->hw.modes[local->scan_hw_mode_idx].num_channels) {
+ local->scan_hw_mode_idx++;
+ local->scan_channel_idx = 0;
+ }
+
+ if (skip)
+ break;
+
+ next_delay = IEEE80211_PROBE_DELAY +
+ usecs_to_jiffies(local->hw.channel_change_time);
+ local->scan_state = SCAN_SEND_PROBE;
+ break;
+ case SCAN_SEND_PROBE:
+ if (ieee80211_active_scan(local)) {
+ ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
+ local->scan_ssid_len);
+ next_delay = IEEE80211_CHANNEL_TIME;
+ } else
+ next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+ local->scan_state = SCAN_SET_CHANNEL;
+ break;
+ }
+
+ if (local->sta_scanning) {
+ if (next_delay)
+ schedule_delayed_work(&local->scan_work, next_delay);
+ else
+ schedule_work(&local->scan_work);
+ }
+}
+
+
+int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+
+ if (ssid_len > IEEE80211_MAX_SSID_LEN)
+ return -EINVAL;
+
+ /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
+ * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
+ * BSSID: MACAddress
+ * SSID
+ * ScanType: ACTIVE, PASSIVE
+ * ProbeDelay: delay (in microseconds) to be used prior to transmitting
+ * a Probe frame during active scanning
+ * ChannelList
+ * MinChannelTime (>= ProbeDelay), in TU
+ * MaxChannelTime: (>= MinChannelTime), in TU
+ */
+
+ /* MLME-SCAN.confirm
+ * BSSDescriptionSet
+ * ResultCode: SUCCESS, INVALID_PARAMETERS
+ */
+
+ /* TODO: if assoc, move to power save mode for the duration of the
+ * scan */
+
+ if (local->sta_scanning) {
+ if (local->scan_work.data == dev)
+ return 0;
+ return -EBUSY;
+ }
+
+ printk(KERN_DEBUG "%s: starting scan\n", dev->name);
+
+ if (local->ops->hw_scan) {
+ int rc = local->ops->hw_scan(local_to_hw(local),
+ ssid, ssid_len);
+ if (!rc) {
+ local->sta_scanning = 1;
+ local->scan_work.data = dev;
+ }
+ return rc;
+ }
+
+ ieee80211_sta_save_oper_chan(dev);
+
+ local->sta_scanning = 1;
+ /* TODO: stop TX queue? */
+
+ if (ssid) {
+ local->scan_ssid_len = ssid_len;
+ memcpy(local->scan_ssid, ssid, ssid_len);
+ } else
+ local->scan_ssid_len = 0;
+ local->scan_state = SCAN_SET_CHANNEL;
+ local->scan_hw_mode_idx = 0;
+ local->scan_channel_idx = 0;
+ INIT_WORK(&local->scan_work, ieee80211_sta_scan_work, dev);
+ schedule_work(&local->scan_work);
+
+ return 0;
+}
+
+
+static char *
+ieee80211_sta_scan_result(struct net_device *dev,
+ struct ieee80211_sta_bss *bss,
+ char *current_ev, char *end_buf)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct iw_event iwe;
+
+ if (time_after(jiffies,
+ bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
+ return current_ev;
+
+ if (!(local->enabled_modes & (1 << bss->hw_mode)))
+ return current_ev;
+
+ if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
+ !bss->wpa_ie && !bss->rsn_ie)
+ return current_ev;
+
+ if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
+ (local->scan_ssid_len != bss->ssid_len ||
+ memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
+ return current_ev;
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWAP;
+ iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+ memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
+ current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+ IW_EV_ADDR_LEN);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWESSID;
+ iwe.u.data.length = bss->ssid_len;
+ iwe.u.data.flags = 1;
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ bss->ssid);
+
+ if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWMODE;
+ if (bss->capability & WLAN_CAPABILITY_ESS)
+ iwe.u.mode = IW_MODE_MASTER;
+ else
+ iwe.u.mode = IW_MODE_ADHOC;
+ current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+ IW_EV_UINT_LEN);
+ }
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWFREQ;
+ iwe.u.freq.m = bss->freq * 100000;
+ iwe.u.freq.e = 1;
+ current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+ IW_EV_FREQ_LEN);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWENCODE;
+ if (bss->capability & WLAN_CAPABILITY_PRIVACY)
+ iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+ else
+ iwe.u.data.flags = IW_ENCODE_DISABLED;
+ iwe.u.data.length = 0;
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
+
+ if (bss && bss->wpa_ie) {
+ char *buf, *p;
+ int i;
+ buf = kmalloc(30 + bss->wpa_ie_len * 2, GFP_ATOMIC);
+ if (buf) {
+ p = buf;
+ p += sprintf(p, "wpa_ie=");
+ for (i = 0; i < bss->wpa_ie_len; i++)
+ p+= sprintf(p, "%02x", bss->wpa_ie[i]);
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf,
+ &iwe, buf);
+ kfree(buf);
+ }
+ }
+
+ if (bss && bss->rsn_ie) {
+ char *buf, *p;
+ int i;
+ buf = kmalloc(30 + bss->rsn_ie_len * 2, GFP_ATOMIC);
+ if (buf) {
+ p = buf;
+ p += sprintf(p, "rsn_ie=");
+ for (i = 0; i < bss->rsn_ie_len; i++)
+ p+= sprintf(p, "%02x", bss->rsn_ie[i]);
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf,
+ &iwe, buf);
+ kfree(buf);
+ }
+ }
+
+ if (bss) {
+ char *buf;
+ buf = kmalloc(30, GFP_ATOMIC);
+ if (buf) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "tsf=%016llx", bss->timestamp);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf,
+ &iwe, buf);
+ kfree(buf);
+ }
+ }
+
+ do {
+ char *buf, *p;
+ int i;
+
+ if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
+ break;
+
+ buf = kmalloc(100, GFP_ATOMIC);
+ if (!buf)
+ break;
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "bcn_int=%d", bss->beacon_int);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ buf);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "rssi=%d", bss->rssi);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ buf);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "capab=0x%04x", bss->capability);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ buf);
+
+ /* dispaly all support rates in readable format */
+ p = current_ev + IW_EV_LCP_LEN;
+ iwe.cmd = SIOCGIWRATE;
+ /* Those two flags are ignored... */
+ iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
+
+ for (i = 0; i < bss->supp_rates_len; i++) {
+ iwe.u.bitrate.value = ((bss->supp_rates[i] &
+ 0x7f) * 500000);
+ p = iwe_stream_add_value(current_ev, p,
+ end_buf, &iwe, IW_EV_PARAM_LEN);
+ }
+ /* Check if we added any rate */
+ if((p - current_ev) > IW_EV_LCP_LEN)
+ current_ev = p;
+
+ kfree(buf);
+ break;
+ } while (0);
+
+ return current_ev;
+}
+
+
+int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ char *current_ev = buf;
+ char *end_buf = buf + len;
+ struct ieee80211_sta_bss *bss;
+
+ spin_lock_bh(&local->sta_bss_lock);
+ list_for_each_entry(bss, &local->sta_bss_list, list) {
+ if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
+ spin_unlock_bh(&local->sta_bss_lock);
+ return -E2BIG;
+ }
+ current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
+ end_buf);
+ }
+ spin_unlock_bh(&local->sta_bss_lock);
+ return current_ev - buf;
+}
+
+
+int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+ kfree(ifsta->extra_ie);
+ if (len == 0) {
+ ifsta->extra_ie = NULL;
+ ifsta->extra_ie_len = 0;
+ return 0;
+ }
+ ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
+ if (!ifsta->extra_ie) {
+ ifsta->extra_ie_len = 0;
+ return -ENOMEM;
+ }
+ memcpy(ifsta->extra_ie, ie, len);
+ ifsta->extra_ie_len = len;
+ if (ifsta->bssid_set && ifsta->ssid_set &&
+ ifsta->state != IEEE80211_AUTHENTICATE)
+ ieee80211_sta_new_auth(dev, ifsta);
+ return 0;
+}
+
+
+struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
+ struct sk_buff *skb, u8 *bssid,
+ u8 *addr)
+{
+ struct ieee80211_local *local = dev->ieee80211_ptr;
+ struct sta_info *sta;
+ struct ieee80211_sub_if_data *sdata = NULL;
+ struct net_device *sta_dev = NULL;
+
+ /* TODO: Could consider removing the least recently used entry and
+ * allow new one to be added. */
+ if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: No room for a new IBSS STA "
+ "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
+ }
+ return NULL;
+ }
+
+ spin_lock_bh(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list)
+ if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
+ memcmp(bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
+ sta_dev = sdata->dev;
+ break;
+ }
+ spin_unlock_bh(&local->sub_if_lock);
+
+ if (!sta_dev)
+ return NULL;
+
+ printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
+ dev->name, MAC_ARG(addr), sta_dev->name);
+
+ sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
+ if (!sta)
+ return NULL;
+
+ sta->dev = sta_dev;
+ sta->supp_rates = sdata->u.sta.supp_rates_bits;
+
+ rate_control_rate_init(sta, local);
+
+ return sta; /* caller will call sta_info_put() */
+}
+
+
+int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+
+ printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
+ dev->name, reason);
+
+ if (sdata->type != IEEE80211_IF_TYPE_STA &&
+ sdata->type != IEEE80211_IF_TYPE_IBSS)
+ return -EINVAL;
+
+ ieee80211_send_deauth(dev, ifsta, reason);
+ ieee80211_set_disassoc(dev, ifsta, 1);
+ return 0;
+}
+
+
+int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+
+ printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
+ dev->name, reason);
+
+ if (sdata->type != IEEE80211_IF_TYPE_STA)
+ return -EINVAL;
+
+ if (!ifsta->associated)
+ return -1;
+
+ ieee80211_send_disassoc(dev, ifsta, reason);
+ ieee80211_set_disassoc(dev, ifsta, 0);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 20:41:14 +0000