diff options
Diffstat (limited to 'package/d80211/src/ieee80211_sta.c')
| -rw-r--r-- | package/d80211/src/ieee80211_sta.c | 2891 |
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 0000000..4985afe --- /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(¶ms, 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, ¶ms)) { + 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; +} |