| /* |
| * BSS client mode implementation |
| * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> |
| * Copyright 2004, Instant802 Networks, Inc. |
| * Copyright 2005, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
| * |
| * 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: |
| * order BSS list by RSSI(?) ("quality of AP") |
| * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, |
| * SSID) |
| */ |
| #include <linux/delay.h> |
| #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 <linux/etherdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <net/iw_handler.h> |
| #include <asm/types.h> |
| |
| #include <net/mac80211.h> |
| #include "ieee80211_i.h" |
| #include "rate.h" |
| #include "led.h" |
| #include "mesh.h" |
| |
| #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
| #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_MESH_HOUSEKEEPING_INTERVAL (60 * 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 (7 * 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_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
| |
| #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 |
| |
| |
| #define ERP_INFO_USE_PROTECTION BIT(1) |
| |
| /* mgmt header + 1 byte category code */ |
| #define IEEE80211_MIN_ACTION_SIZE (24 + 1) |
| |
| #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 |
| #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C |
| #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 |
| #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 |
| #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 |
| |
| /* next values represent the buffer size for A-MPDU frame. |
| * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ |
| #define IEEE80211_MIN_AMPDU_BUF 0x8 |
| #define IEEE80211_MAX_AMPDU_BUF 0x40 |
| |
| static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
| u8 *ssid, size_t ssid_len); |
| static struct ieee80211_sta_bss * |
| ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
| u8 *ssid, u8 ssid_len); |
| static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
| struct ieee80211_sta_bss *bss); |
| static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta); |
| static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata); |
| static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata, |
| u8 *ssid, size_t ssid_len); |
| static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta); |
| static void sta_rx_agg_session_timer_expired(unsigned long data); |
| |
| |
| static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie) |
| { |
| u8 *end, *pos; |
| |
| pos = bss->ies; |
| if (pos == NULL) |
| return NULL; |
| end = pos + bss->ies_len; |
| |
| while (pos + 1 < end) { |
| if (pos + 2 + pos[1] > end) |
| break; |
| if (pos[0] == ie) |
| return pos; |
| pos += 2 + pos[1]; |
| } |
| |
| return NULL; |
| } |
| |
| |
| static int ecw2cw(int ecw) |
| { |
| return (1 << ecw) - 1; |
| } |
| |
| |
| static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_sta_bss *bss, |
| int ibss) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int i, have_higher_than_11mbit = 0; |
| |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| for (i = 0; i < bss->supp_rates_len; i++) |
| if ((bss->supp_rates[i] & 0x7f) * 5 > 110) |
| have_higher_than_11mbit = 1; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| |
| |
| if (local->ops->conf_tx) { |
| struct ieee80211_tx_queue_params qparam; |
| |
| memset(&qparam, 0, sizeof(qparam)); |
| |
| qparam.aifs = 2; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) |
| qparam.cw_min = 31; |
| else |
| qparam.cw_min = 15; |
| |
| qparam.cw_max = 1023; |
| qparam.txop = 0; |
| |
| for (i = 0; i < local_to_hw(local)->queues; i++) |
| local->ops->conf_tx(local_to_hw(local), i, &qparam); |
| } |
| } |
| |
| static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
| struct ieee80211_if_sta *ifsta, |
| u8 *wmm_param, size_t wmm_param_len) |
| { |
| struct ieee80211_tx_queue_params params; |
| size_t left; |
| int count; |
| u8 *pos; |
| |
| if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
| return; |
| |
| if (!wmm_param) |
| return; |
| |
| 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 = 3; |
| if (acm) |
| local->wmm_acm |= BIT(0) | BIT(3); |
| break; |
| case 2: |
| queue = 1; |
| if (acm) |
| local->wmm_acm |= BIT(4) | BIT(5); |
| break; |
| case 3: |
| queue = 0; |
| if (acm) |
| local->wmm_acm |= BIT(6) | BIT(7); |
| break; |
| case 0: |
| default: |
| queue = 2; |
| if (acm) |
| local->wmm_acm |= BIT(1) | BIT(2); |
| break; |
| } |
| |
| params.aifs = pos[0] & 0x0f; |
| params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
| params.cw_min = ecw2cw(pos[1] & 0x0f); |
| params.txop = get_unaligned_le16(pos + 2); |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
| "cWmin=%d cWmax=%d txop=%d\n", |
| local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
| params.cw_max, params.txop); |
| #endif |
| /* 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", local->mdev->name, queue); |
| } |
| } |
| } |
| |
| static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata, |
| bool use_protection, |
| bool use_short_preamble) |
| { |
| struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| DECLARE_MAC_BUF(mac); |
| #endif |
| u32 changed = 0; |
| |
| if (use_protection != bss_conf->use_cts_prot) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" |
| "%s)\n", |
| sdata->dev->name, |
| use_protection ? "enabled" : "disabled", |
| print_mac(mac, ifsta->bssid)); |
| } |
| #endif |
| bss_conf->use_cts_prot = use_protection; |
| changed |= BSS_CHANGED_ERP_CTS_PROT; |
| } |
| |
| if (use_short_preamble != bss_conf->use_short_preamble) { |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) { |
| printk(KERN_DEBUG "%s: switched to %s barker preamble" |
| " (BSSID=%s)\n", |
| sdata->dev->name, |
| use_short_preamble ? "short" : "long", |
| print_mac(mac, ifsta->bssid)); |
| } |
| #endif |
| bss_conf->use_short_preamble = use_short_preamble; |
| changed |= BSS_CHANGED_ERP_PREAMBLE; |
| } |
| |
| return changed; |
| } |
| |
| static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
| u8 erp_value) |
| { |
| bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; |
| bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; |
| |
| return ieee80211_handle_protect_preamb(sdata, |
| use_protection, use_short_preamble); |
| } |
| |
| static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_sta_bss *bss) |
| { |
| u32 changed = 0; |
| |
| if (bss->has_erp_value) |
| changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value); |
| else { |
| u16 capab = bss->capability; |
| changed |= ieee80211_handle_protect_preamb(sdata, false, |
| (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); |
| } |
| |
| return changed; |
| } |
| |
| int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
| struct ieee80211_ht_info *ht_info) |
| { |
| |
| if (ht_info == NULL) |
| return -EINVAL; |
| |
| memset(ht_info, 0, sizeof(*ht_info)); |
| |
| if (ht_cap_ie) { |
| u8 ampdu_info = ht_cap_ie->ampdu_params_info; |
| |
| ht_info->ht_supported = 1; |
| ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); |
| ht_info->ampdu_factor = |
| ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; |
| ht_info->ampdu_density = |
| (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; |
| memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); |
| } else |
| ht_info->ht_supported = 0; |
| |
| return 0; |
| } |
| |
| int ieee80211_ht_addt_info_ie_to_ht_bss_info( |
| struct ieee80211_ht_addt_info *ht_add_info_ie, |
| struct ieee80211_ht_bss_info *bss_info) |
| { |
| if (bss_info == NULL) |
| return -EINVAL; |
| |
| memset(bss_info, 0, sizeof(*bss_info)); |
| |
| if (ht_add_info_ie) { |
| u16 op_mode; |
| op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); |
| |
| bss_info->primary_channel = ht_add_info_ie->control_chan; |
| bss_info->bss_cap = ht_add_info_ie->ht_param; |
| bss_info->bss_op_mode = (u8)(op_mode & 0xff); |
| } |
| |
| return 0; |
| } |
| |
| static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| union iwreq_data wrqu; |
| |
| if (ifsta->assocreq_ies) { |
| memset(&wrqu, 0, sizeof(wrqu)); |
| wrqu.data.length = ifsta->assocreq_ies_len; |
| wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu, |
| ifsta->assocreq_ies); |
| } |
| if (ifsta->assocresp_ies) { |
| memset(&wrqu, 0, sizeof(wrqu)); |
| wrqu.data.length = ifsta->assocresp_ies_len; |
| wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu, |
| ifsta->assocresp_ies); |
| } |
| } |
| |
| |
| static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| bool assoc) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
| union iwreq_data wrqu; |
| u32 changed = BSS_CHANGED_ASSOC; |
| |
| if (assoc) { |
| struct ieee80211_sta_bss *bss; |
| |
| ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| return; |
| |
| bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
| conf->channel->center_freq, |
| ifsta->ssid, ifsta->ssid_len); |
| if (bss) { |
| /* set timing information */ |
| sdata->bss_conf.beacon_int = bss->beacon_int; |
| sdata->bss_conf.timestamp = bss->timestamp; |
| sdata->bss_conf.dtim_period = bss->dtim_period; |
| |
| changed |= ieee80211_handle_bss_capability(sdata, bss); |
| |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
| changed |= BSS_CHANGED_HT; |
| sdata->bss_conf.assoc_ht = 1; |
| sdata->bss_conf.ht_conf = &conf->ht_conf; |
| sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; |
| } |
| |
| ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
| 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(sdata, ifsta); |
| } else { |
| netif_carrier_off(sdata->dev); |
| ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid); |
| ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
| changed |= ieee80211_reset_erp_info(sdata); |
| |
| sdata->bss_conf.assoc_ht = 0; |
| sdata->bss_conf.ht_conf = NULL; |
| sdata->bss_conf.ht_bss_conf = NULL; |
| |
| memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
| } |
| ifsta->last_probe = jiffies; |
| ieee80211_led_assoc(local, assoc); |
| |
| sdata->bss_conf.assoc = assoc; |
| ieee80211_bss_info_change_notify(sdata, changed); |
| |
| if (assoc) |
| netif_carrier_on(sdata->dev); |
| |
| wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
| } |
| |
| static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, int deauth) |
| { |
| if (deauth) { |
| ifsta->direct_probe_tries = 0; |
| ifsta->auth_tries = 0; |
| } |
| ifsta->assoc_scan_tries = 0; |
| ifsta->assoc_tries = 0; |
| ieee80211_set_associated(sdata, ifsta, 0); |
| } |
| |
| void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
| int encrypt) |
| { |
| skb->dev = sdata->local->mdev; |
| skb_set_mac_header(skb, 0); |
| skb_set_network_header(skb, 0); |
| skb_set_transport_header(skb, 0); |
| |
| skb->iif = sdata->dev->ifindex; |
| skb->do_not_encrypt = !encrypt; |
| |
| dev_queue_xmit(skb); |
| } |
| |
| |
| static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| int transaction, u8 *extra, size_t extra_len, |
| int encrypt) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 6 + extra_len); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for auth " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); |
| memset(mgmt, 0, 24 + 6); |
| mgmt->frame_control = cpu_to_le16(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, sdata->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(sdata, skb, encrypt); |
| } |
| |
| static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| DECLARE_MAC_BUF(mac); |
| |
| ifsta->direct_probe_tries++; |
| if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| return; |
| } |
| |
| printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid), |
| ifsta->direct_probe_tries); |
| |
| ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| |
| set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
| |
| /* Direct probe is sent to broadcast address as some APs |
| * will not answer to direct packet in unassociated state. |
| */ |
| ieee80211_send_probe_req(sdata, NULL, |
| ifsta->ssid, ifsta->ssid_len); |
| |
| mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
| } |
| |
| |
| static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| DECLARE_MAC_BUF(mac); |
| |
| ifsta->auth_tries++; |
| if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: authentication with AP %s" |
| " timed out\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| return; |
| } |
| |
| ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| |
| ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
| |
| mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
| } |
| |
| static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
| struct ieee80211_supported_band *sband, |
| u64 *rates) |
| { |
| int i, j, count; |
| *rates = 0; |
| count = 0; |
| for (i = 0; i < bss->supp_rates_len; i++) { |
| int rate = (bss->supp_rates[i] & 0x7F) * 5; |
| |
| for (j = 0; j < sband->n_bitrates; j++) |
| if (sband->bitrates[j].bitrate == rate) { |
| *rates |= BIT(j); |
| count++; |
| break; |
| } |
| } |
| |
| return count; |
| } |
| |
| static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos, *ies, *ht_add_ie; |
| int i, len, count, rates_len, supp_rates_len; |
| u16 capab; |
| struct ieee80211_sta_bss *bss; |
| int wmm = 0; |
| struct ieee80211_supported_band *sband; |
| u64 rates = 0; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 200 + ifsta->extra_ie_len + |
| ifsta->ssid_len); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| capab = ifsta->capab; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { |
| if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
| capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
| capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| } |
| |
| bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
| local->hw.conf.channel->center_freq, |
| ifsta->ssid, ifsta->ssid_len); |
| if (bss) { |
| if (bss->capability & WLAN_CAPABILITY_PRIVACY) |
| capab |= WLAN_CAPABILITY_PRIVACY; |
| if (bss->wmm_used) |
| wmm = 1; |
| |
| /* get all rates supported by the device and the AP as |
| * some APs don't like getting a superset of their rates |
| * in the association request (e.g. D-Link DAP 1353 in |
| * b-only mode) */ |
| rates_len = ieee80211_compatible_rates(bss, sband, &rates); |
| |
| if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
| (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
| capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
| |
| ieee80211_rx_bss_put(local, bss); |
| } else { |
| rates = ~0; |
| rates_len = sband->n_bitrates; |
| } |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| |
| if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
| skb_put(skb, 10); |
| mgmt->frame_control = cpu_to_le16(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(local->hw.conf.listen_interval); |
| memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
| ETH_ALEN); |
| } else { |
| skb_put(skb, 4); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ASSOC_REQ); |
| mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
| mgmt->u.reassoc_req.listen_interval = |
| cpu_to_le16(local->hw.conf.listen_interval); |
| } |
| |
| /* 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); |
| |
| /* add all rates which were marked to be used above */ |
| supp_rates_len = rates_len; |
| if (supp_rates_len > 8) |
| supp_rates_len = 8; |
| |
| len = sband->n_bitrates; |
| pos = skb_put(skb, supp_rates_len + 2); |
| *pos++ = WLAN_EID_SUPP_RATES; |
| *pos++ = supp_rates_len; |
| |
| count = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (BIT(i) & rates) { |
| int rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| if (++count == 8) |
| break; |
| } |
| } |
| |
| if (rates_len > count) { |
| pos = skb_put(skb, rates_len - count + 2); |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| *pos++ = rates_len - count; |
| |
| for (i++; i < sband->n_bitrates; i++) { |
| if (BIT(i) & rates) { |
| int rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| } |
| } |
| } |
| |
| if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
| /* 1. power capabilities */ |
| pos = skb_put(skb, 4); |
| *pos++ = WLAN_EID_PWR_CAPABILITY; |
| *pos++ = 2; |
| *pos++ = 0; /* min tx power */ |
| *pos++ = local->hw.conf.channel->max_power; /* max tx power */ |
| |
| /* 2. supported channels */ |
| /* TODO: get this in reg domain format */ |
| pos = skb_put(skb, 2 * sband->n_channels + 2); |
| *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
| *pos++ = 2 * sband->n_channels; |
| for (i = 0; i < sband->n_channels; i++) { |
| *pos++ = ieee80211_frequency_to_channel( |
| sband->channels[i].center_freq); |
| *pos++ = 1; /* one channel in the subband*/ |
| } |
| } |
| |
| if (ifsta->extra_ie) { |
| pos = skb_put(skb, ifsta->extra_ie_len); |
| memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); |
| } |
| |
| if (wmm && (ifsta->flags & IEEE80211_STA_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; |
| } |
| |
| /* wmm support is a must to HT */ |
| if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
| sband->ht_info.ht_supported && |
| (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { |
| struct ieee80211_ht_addt_info *ht_add_info = |
| (struct ieee80211_ht_addt_info *)ht_add_ie; |
| u16 cap = sband->ht_info.cap; |
| __le16 tmp; |
| u32 flags = local->hw.conf.channel->flags; |
| |
| switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_IE_CHA_SEC_ABOVE: |
| if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
| cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; |
| cap &= ~IEEE80211_HT_CAP_SGI_40; |
| } |
| break; |
| case IEEE80211_HT_IE_CHA_SEC_BELOW: |
| if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
| cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; |
| cap &= ~IEEE80211_HT_CAP_SGI_40; |
| } |
| break; |
| } |
| |
| tmp = cpu_to_le16(cap); |
| pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
| *pos++ = WLAN_EID_HT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_ht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| memcpy(pos, &tmp, sizeof(u16)); |
| pos += sizeof(u16); |
| /* TODO: needs a define here for << 2 */ |
| *pos++ = sband->ht_info.ampdu_factor | |
| (sband->ht_info.ampdu_density << 2); |
| memcpy(pos, sband->ht_info.supp_mcs_set, 16); |
| } |
| |
| kfree(ifsta->assocreq_ies); |
| ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; |
| ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
| if (ifsta->assocreq_ies) |
| memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| |
| static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, u16 reason) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_DEAUTH); |
| skb_put(skb, 2); |
| mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| |
| static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, u16 reason) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_DISASSOC); |
| skb_put(skb, 2); |
| mgmt->u.disassoc.reason_code = cpu_to_le16(reason); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| |
| static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_sta_bss *bss; |
| int bss_privacy; |
| int wep_privacy; |
| int privacy_invoked; |
| |
| if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
| return 0; |
| |
| bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
| local->hw.conf.channel->center_freq, |
| ifsta->ssid, ifsta->ssid_len); |
| if (!bss) |
| return 0; |
| |
| bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
| wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
| privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
| |
| ieee80211_rx_bss_put(local, bss); |
| |
| if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
| return 0; |
| |
| return 1; |
| } |
| |
| |
| static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| DECLARE_MAC_BUF(mac); |
| |
| ifsta->assoc_tries++; |
| if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { |
| printk(KERN_DEBUG "%s: association with AP %s" |
| " timed out\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| return; |
| } |
| |
| ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
| printk(KERN_DEBUG "%s: associate with AP %s\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
| printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
| "mixed-cell disabled - abort association\n", sdata->dev->name); |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| return; |
| } |
| |
| ieee80211_send_assoc(sdata, ifsta); |
| |
| mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
| } |
| |
| |
| static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| int disassoc; |
| DECLARE_MAC_BUF(mac); |
| |
| /* 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_STA_MLME_ASSOCIATED; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, ifsta->bssid); |
| if (!sta) { |
| printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| disassoc = 1; |
| } else { |
| disassoc = 0; |
| if (time_after(jiffies, |
| sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { |
| if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
| printk(KERN_DEBUG "%s: No ProbeResp from " |
| "current AP %s - assume out of " |
| "range\n", |
| sdata->dev->name, print_mac(mac, ifsta->bssid)); |
| disassoc = 1; |
| sta_info_unlink(&sta); |
| } else |
| ieee80211_send_probe_req(sdata, ifsta->bssid, |
| local->scan_ssid, |
| local->scan_ssid_len); |
| ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
| } else { |
| ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
| if (time_after(jiffies, ifsta->last_probe + |
| IEEE80211_PROBE_INTERVAL)) { |
| ifsta->last_probe = jiffies; |
| ieee80211_send_probe_req(sdata, ifsta->bssid, |
| ifsta->ssid, |
| ifsta->ssid_len); |
| } |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| if (disassoc && sta) |
| sta_info_destroy(sta); |
| |
| if (disassoc) { |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| ieee80211_set_associated(sdata, ifsta, 0); |
| } else { |
| mod_timer(&ifsta->timer, jiffies + |
| IEEE80211_MONITORING_INTERVAL); |
| } |
| } |
| |
| |
| static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
| u8 *ssid, size_t ssid_len) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos, *supp_rates, *esupp_rates = NULL; |
| int i; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for probe " |
| "request\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_PROBE_REQ); |
| memcpy(mgmt->sa, sdata->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; |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| for (i = 0; i < sband->n_bitrates; i++) { |
| struct ieee80211_rate *rate = &sband->bitrates[i]; |
| 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]++; |
| } |
| *pos = rate->bitrate / 5; |
| } |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| |
| static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
| { |
| if (!sdata || !sdata->default_key || |
| sdata->default_key->conf.alg != ALG_WEP) |
| return 0; |
| return 1; |
| } |
| |
| |
| static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
| ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
| ieee80211_associate(sdata, ifsta); |
| } |
| |
| |
| static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| u8 *pos; |
| struct ieee802_11_elems elems; |
| |
| pos = mgmt->u.auth.variable; |
| ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
| if (!elems.challenge) |
| return; |
| ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
| elems.challenge_len + 2, 1); |
| } |
| |
| static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
| u8 dialog_token, u16 status, u16 policy, |
| u16 buf_size, u16 timeout) |
| { |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u16 capab; |
| |
| skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
| |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer " |
| "for addba resp frame\n", sdata->dev->name); |
| return; |
| } |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, da, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
| memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
| else |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ACTION); |
| |
| skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); |
| mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; |
| mgmt->u.action.u.addba_resp.dialog_token = dialog_token; |
| |
| capab = (u16)(policy << 1); /* bit 1 aggregation policy */ |
| capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
| capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ |
| |
| mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); |
| mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); |
| mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| |
| return; |
| } |
| |
| void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, |
| u16 tid, u8 dialog_token, u16 start_seq_num, |
| u16 agg_size, u16 timeout) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u16 capab; |
| |
| skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
| |
| if (!skb) { |
| printk(KERN_ERR "%s: failed to allocate buffer " |
| "for addba request frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, da, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
| memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
| else |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ACTION); |
| |
| skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); |
| |
| mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; |
| |
| mgmt->u.action.u.addba_req.dialog_token = dialog_token; |
| capab = (u16)(1 << 1); /* bit 1 aggregation policy */ |
| capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
| capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ |
| |
| mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); |
| |
| mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); |
| mgmt->u.action.u.addba_req.start_seq_num = |
| cpu_to_le16(start_seq_num << 4); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct ieee80211_conf *conf = &hw->conf; |
| struct sta_info *sta; |
| struct tid_ampdu_rx *tid_agg_rx; |
| u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; |
| u8 dialog_token; |
| int ret = -EOPNOTSUPP; |
| DECLARE_MAC_BUF(mac); |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, mgmt->sa); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| /* extract session parameters from addba request frame */ |
| dialog_token = mgmt->u.action.u.addba_req.dialog_token; |
| timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); |
| start_seq_num = |
| le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; |
| |
| capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); |
| ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; |
| tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
| buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; |
| |
| status = WLAN_STATUS_REQUEST_DECLINED; |
| |
| /* sanity check for incoming parameters: |
| * check if configuration can support the BA policy |
| * and if buffer size does not exceeds max value */ |
| if (((ba_policy != 1) |
| && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) |
| || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { |
| status = WLAN_STATUS_INVALID_QOS_PARAM; |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_DEBUG "AddBA Req with bad params from " |
| "%s on tid %u. policy %d, buffer size %d\n", |
| print_mac(mac, mgmt->sa), tid, ba_policy, |
| buf_size); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| goto end_no_lock; |
| } |
| /* determine default buffer size */ |
| if (buf_size == 0) { |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[conf->channel->band]; |
| buf_size = IEEE80211_MIN_AMPDU_BUF; |
| buf_size = buf_size << sband->ht_info.ampdu_factor; |
| } |
| |
| |
| /* examine state machine */ |
| spin_lock_bh(&sta->lock); |
| |
| if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_DEBUG "unexpected AddBA Req from " |
| "%s on tid %u\n", |
| print_mac(mac, mgmt->sa), tid); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| goto end; |
| } |
| |
| /* prepare A-MPDU MLME for Rx aggregation */ |
| sta->ampdu_mlme.tid_rx[tid] = |
| kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); |
| if (!sta->ampdu_mlme.tid_rx[tid]) { |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_ERR "allocate rx mlme to tid %d failed\n", |
| tid); |
| #endif |
| goto end; |
| } |
| /* rx timer */ |
| sta->ampdu_mlme.tid_rx[tid]->session_timer.function = |
| sta_rx_agg_session_timer_expired; |
| sta->ampdu_mlme.tid_rx[tid]->session_timer.data = |
| (unsigned long)&sta->timer_to_tid[tid]; |
| init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
| |
| tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; |
| |
| /* prepare reordering buffer */ |
| tid_agg_rx->reorder_buf = |
| kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
| if (!tid_agg_rx->reorder_buf) { |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_ERR "can not allocate reordering buffer " |
| "to tid %d\n", tid); |
| #endif |
| kfree(sta->ampdu_mlme.tid_rx[tid]); |
| goto end; |
| } |
| memset(tid_agg_rx->reorder_buf, 0, |
| buf_size * sizeof(struct sk_buff *)); |
| |
| if (local->ops->ampdu_action) |
| ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, |
| sta->addr, tid, &start_seq_num); |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| |
| if (ret) { |
| kfree(tid_agg_rx->reorder_buf); |
| kfree(tid_agg_rx); |
| sta->ampdu_mlme.tid_rx[tid] = NULL; |
| goto end; |
| } |
| |
| /* change state and send addba resp */ |
| sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
| tid_agg_rx->dialog_token = dialog_token; |
| tid_agg_rx->ssn = start_seq_num; |
| tid_agg_rx->head_seq_num = start_seq_num; |
| tid_agg_rx->buf_size = buf_size; |
| tid_agg_rx->timeout = timeout; |
| tid_agg_rx->stored_mpdu_num = 0; |
| status = WLAN_STATUS_SUCCESS; |
| end: |
| spin_unlock_bh(&sta->lock); |
| |
| end_no_lock: |
| ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
| dialog_token, status, 1, buf_size, timeout); |
| rcu_read_unlock(); |
| } |
| |
| static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct sta_info *sta; |
| u16 capab; |
| u16 tid; |
| u8 *state; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, mgmt->sa); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); |
| tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
| |
| state = &sta->ampdu_mlme.tid_state_tx[tid]; |
| |
| spin_lock_bh(&sta->lock); |
| |
| if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
| spin_unlock_bh(&sta->lock); |
| goto addba_resp_exit; |
| } |
| |
| if (mgmt->u.action.u.addba_resp.dialog_token != |
| sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
| spin_unlock_bh(&sta->lock); |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| goto addba_resp_exit; |
| } |
| |
| del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) |
| == WLAN_STATUS_SUCCESS) { |
| *state |= HT_ADDBA_RECEIVED_MSK; |
| sta->ampdu_mlme.addba_req_num[tid] = 0; |
| |
| if (*state == HT_AGG_STATE_OPERATIONAL) |
| ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
| |
| spin_unlock_bh(&sta->lock); |
| } else { |
| sta->ampdu_mlme.addba_req_num[tid]++; |
| /* this will allow the state check in stop_BA_session */ |
| *state = HT_AGG_STATE_OPERATIONAL; |
| spin_unlock_bh(&sta->lock); |
| ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
| WLAN_BACK_INITIATOR); |
| } |
| |
| addba_resp_exit: |
| rcu_read_unlock(); |
| } |
| |
| void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, |
| u16 initiator, u16 reason_code) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u16 params; |
| |
| skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
| |
| if (!skb) { |
| printk(KERN_ERR "%s: failed to allocate buffer " |
| "for delba frame\n", sdata->dev->name); |
| return; |
| } |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, da, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
| memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
| else |
| memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ACTION); |
| |
| skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); |
| |
| mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; |
| params = (u16)(initiator << 11); /* bit 11 initiator */ |
| params |= (u16)(tid << 12); /* bit 15:12 TID number */ |
| |
| mgmt->u.action.u.delba.params = cpu_to_le16(params); |
| mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_bar *bar; |
| u16 bar_control = 0; |
| |
| skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); |
| if (!skb) { |
| printk(KERN_ERR "%s: failed to allocate buffer for " |
| "bar frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); |
| memset(bar, 0, sizeof(*bar)); |
| bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| IEEE80211_STYPE_BACK_REQ); |
| memcpy(bar->ra, ra, ETH_ALEN); |
| memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN); |
| bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
| bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; |
| bar_control |= (u16)(tid << 12); |
| bar->control = cpu_to_le16(bar_control); |
| bar->start_seq_num = cpu_to_le16(ssn); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, |
| u16 initiator, u16 reason) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_hw *hw = &local->hw; |
| struct sta_info *sta; |
| int ret, i; |
| DECLARE_MAC_BUF(mac); |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, ra); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| /* check if TID is in operational state */ |
| spin_lock_bh(&sta->lock); |
| if (sta->ampdu_mlme.tid_state_rx[tid] |
| != HT_AGG_STATE_OPERATIONAL) { |
| spin_unlock_bh(&sta->lock); |
| rcu_read_unlock(); |
| return; |
| } |
| sta->ampdu_mlme.tid_state_rx[tid] = |
| HT_AGG_STATE_REQ_STOP_BA_MSK | |
| (initiator << HT_AGG_STATE_INITIATOR_SHIFT); |
| spin_unlock_bh(&sta->lock); |
| |
| /* stop HW Rx aggregation. ampdu_action existence |
| * already verified in session init so we add the BUG_ON */ |
| BUG_ON(!local->ops->ampdu_action); |
| |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n", |
| print_mac(mac, ra), tid); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| |
| ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, |
| ra, tid, NULL); |
| if (ret) |
| printk(KERN_DEBUG "HW problem - can not stop rx " |
| "aggregation for tid %d\n", tid); |
| |
| /* shutdown timer has not expired */ |
| if (initiator != WLAN_BACK_TIMER) |
| del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
| |
| /* check if this is a self generated aggregation halt */ |
| if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) |
| ieee80211_send_delba(sdata, ra, tid, 0, reason); |
| |
| /* free the reordering buffer */ |
| for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
| if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { |
| /* release the reordered frames */ |
| dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
| sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; |
| sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; |
| } |
| } |
| /* free resources */ |
| kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); |
| kfree(sta->ampdu_mlme.tid_rx[tid]); |
| sta->ampdu_mlme.tid_rx[tid] = NULL; |
| sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; |
| |
| rcu_read_unlock(); |
| } |
| |
| |
| static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, size_t len) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| u16 tid, params; |
| u16 initiator; |
| DECLARE_MAC_BUF(mac); |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, mgmt->sa); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| params = le16_to_cpu(mgmt->u.action.u.delba.params); |
| tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; |
| initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; |
| |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
| print_mac(mac, mgmt->sa), |
| initiator ? "initiator" : "recipient", tid, |
| mgmt->u.action.u.delba.reason_code); |
| #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| |
| if (initiator == WLAN_BACK_INITIATOR) |
| ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
| WLAN_BACK_INITIATOR, 0); |
| else { /* WLAN_BACK_RECIPIENT */ |
| spin_lock_bh(&sta->lock); |
| sta->ampdu_mlme.tid_state_tx[tid] = |
| HT_AGG_STATE_OPERATIONAL; |
| spin_unlock_bh(&sta->lock); |
| ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
| WLAN_BACK_RECIPIENT); |
| } |
| rcu_read_unlock(); |
| } |
| |
| /* |
| * After sending add Block Ack request we activated a timer until |
| * add Block Ack response will arrive from the recipient. |
| * If this timer expires sta_addba_resp_timer_expired will be executed. |
| */ |
| void sta_addba_resp_timer_expired(unsigned long data) |
| { |
| /* not an elegant detour, but there is no choice as the timer passes |
| * only one argument, and both sta_info and TID are needed, so init |
| * flow in sta_info_create gives the TID as data, while the timer_to_id |
| * array gives the sta through container_of */ |
| u16 tid = *(u8 *)data; |
| struct sta_info *temp_sta = container_of((void *)data, |
| struct sta_info, timer_to_tid[tid]); |
| |
| struct ieee80211_local *local = temp_sta->local; |
| struct ieee80211_hw *hw = &local->hw; |
| struct sta_info *sta; |
| u8 *state; |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, temp_sta->addr); |
| if (!sta) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| state = &sta->ampdu_mlme.tid_state_tx[tid]; |
| /* check if the TID waits for addBA response */ |
| spin_lock_bh(&sta->lock); |
| if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
| spin_unlock_bh(&sta->lock); |
| *state = HT_AGG_STATE_IDLE; |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "timer expired on tid %d but we are not " |
| "expecting addBA response there", tid); |
| #endif |
| goto timer_expired_exit; |
| } |
| |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
| #endif |
| |
| /* go through the state check in stop_BA_session */ |
| *state = HT_AGG_STATE_OPERATIONAL; |
| spin_unlock_bh(&sta->lock); |
| ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, |
| WLAN_BACK_INITIATOR); |
| |
| timer_expired_exit: |
| rcu_read_unlock(); |
| } |
| |
| /* |
| * After accepting the AddBA Request we activated a timer, |
| * resetting it after each frame that arrives from the originator. |
| * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
| */ |
| static void sta_rx_agg_session_timer_expired(unsigned long data) |
| { |
| /* not an elegant detour, but there is no choice as the timer passes |
| * only one argument, and various sta_info are needed here, so init |
| * flow in sta_info_create gives the TID as data, while the timer_to_id |
| * array gives the sta through container_of */ |
| u8 *ptid = (u8 *)data; |
| u8 *timer_to_id = ptid - *ptid; |
| struct sta_info *sta = container_of(timer_to_id, struct sta_info, |
| timer_to_tid[0]); |
| |
| #ifdef CONFIG_MAC80211_HT_DEBUG |
| printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
| #endif |
| ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
| (u16)*ptid, WLAN_BACK_TIMER, |
| WLAN_REASON_QSTA_TIMEOUT); |
| } |
| |
| void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int i; |
| |
| for (i = 0; i < STA_TID_NUM; i++) { |
| ieee80211_stop_tx_ba_session(&local->hw, addr, i, |
| WLAN_BACK_INITIATOR); |
| ieee80211_sta_stop_rx_ba_session(sdata, addr, i, |
| WLAN_BACK_RECIPIENT, |
| WLAN_REASON_QSTA_LEAVE_QBSS); |
| } |
| } |
| |
| static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_msrment_ie *request_ie, |
| const u8 *da, const u8 *bssid, |
| u8 dialog_token) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *msr_report; |
| |
| skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + |
| sizeof(struct ieee80211_msrment_ie)); |
| |
| if (!skb) { |
| printk(KERN_ERR "%s: failed to allocate buffer for " |
| "measurement report frame\n", sdata->dev->name); |
| return; |
| } |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); |
| memset(msr_report, 0, 24); |
| memcpy(msr_report->da, da, ETH_ALEN); |
| memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(msr_report->bssid, bssid, ETH_ALEN); |
| msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ACTION); |
| |
| skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); |
| msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; |
| msr_report->u.action.u.measurement.action_code = |
| WLAN_ACTION_SPCT_MSR_RPRT; |
| msr_report->u.action.u.measurement.dialog_token = dialog_token; |
| |
| msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; |
| msr_report->u.action.u.measurement.length = |
| sizeof(struct ieee80211_msrment_ie); |
| |
| memset(&msr_report->u.action.u.measurement.msr_elem, 0, |
| sizeof(struct ieee80211_msrment_ie)); |
| msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; |
| msr_report->u.action.u.measurement.msr_elem.mode |= |
| IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; |
| msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| /* |
| * Ignoring measurement request is spec violation. |
| * Mandatory measurements must be reported optional |
| * measurements might be refused or reported incapable |
| * For now just refuse |
| * TODO: Answer basic measurement as unmeasured |
| */ |
| ieee80211_send_refuse_measurement_request(sdata, |
| &mgmt->u.action.u.measurement.msr_elem, |
| mgmt->sa, mgmt->bssid, |
| mgmt->u.action.u.measurement.dialog_token); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| u16 auth_alg, auth_transaction, status_code; |
| DECLARE_MAC_BUF(mac); |
| |
| if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
| sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
| return; |
| |
| if (len < 24 + 6) |
| return; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
| memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
| return; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
| memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
| 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); |
| |
| if (sdata->vif.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. |
| */ |
| if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
| return; |
| ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
| } |
| |
| if (auth_alg != ifsta->auth_alg || |
| auth_transaction != ifsta->auth_transaction) |
| return; |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| 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(sdata)) |
| continue; |
| ifsta->auth_alg = algs[pos]; |
| break; |
| } |
| } |
| return; |
| } |
| |
| switch (ifsta->auth_alg) { |
| case WLAN_AUTH_OPEN: |
| case WLAN_AUTH_LEAP: |
| ieee80211_auth_completed(sdata, ifsta); |
| break; |
| case WLAN_AUTH_SHARED_KEY: |
| if (ifsta->auth_transaction == 4) |
| ieee80211_auth_completed(sdata, ifsta); |
| else |
| ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
| break; |
| } |
| } |
| |
| |
| static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| u16 reason_code; |
| DECLARE_MAC_BUF(mac); |
| |
| if (len < 24 + 2) |
| return; |
| |
| if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
| return; |
| |
| reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| |
| if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
| printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
| |
| if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
| ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || |
| ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
| ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| mod_timer(&ifsta->timer, jiffies + |
| IEEE80211_RETRY_AUTH_INTERVAL); |
| } |
| |
| ieee80211_set_disassoc(sdata, ifsta, 1); |
| ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
| } |
| |
| |
| static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len) |
| { |
| u16 reason_code; |
| DECLARE_MAC_BUF(mac); |
| |
| if (len < 24 + 2) |
| return; |
| |
| if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
| return; |
| |
| reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| |
| if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
| printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
| |
| if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
| ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
| mod_timer(&ifsta->timer, jiffies + |
| IEEE80211_RETRY_AUTH_INTERVAL); |
| } |
| |
| ieee80211_set_disassoc(sdata, ifsta, 0); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| int reassoc) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct sta_info *sta; |
| u64 rates, basic_rates; |
| u16 capab_info, status_code, aid; |
| struct ieee802_11_elems elems; |
| struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
| u8 *pos; |
| int i, j; |
| DECLARE_MAC_BUF(mac); |
| bool have_higher_than_11mbit = false; |
| |
| /* AssocResp and ReassocResp have identical structure, so process both |
| * of them in this function. */ |
| |
| if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
| return; |
| |
| if (len < 24 + 6) |
| return; |
| |
| if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
| 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); |
| |
| printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
| "status=%d aid=%d)\n", |
| sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
| capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", |
| sdata->dev->name, status_code); |
| /* if this was a reassociation, ensure we try a "full" |
| * association next time. This works around some broken APs |
| * which do not correctly reject reassociation requests. */ |
| ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
| return; |
| } |
| |
| if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
| printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " |
| "set\n", sdata->dev->name, aid); |
| aid &= ~(BIT(15) | BIT(14)); |
| |
| pos = mgmt->u.assoc_resp.variable; |
| ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
| |
| if (!elems.supp_rates) { |
| printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", |
| sdata->dev->name); |
| return; |
| } |
| |
| printk(KERN_DEBUG "%s: associated\n", sdata->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_KERNEL); |
| if (ifsta->assocresp_ies) |
| memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); |
| |
| rcu_read_lock(); |
| |
| /* Add STA entry for the AP */ |
| sta = sta_info_get(local, ifsta->bssid); |
| if (!sta) { |
| struct ieee80211_sta_bss *bss; |
| int err; |
| |
| sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
| if (!sta) { |
| printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
| " the AP\n", sdata->dev->name); |
| rcu_read_unlock(); |
| return; |
| } |
| bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
| local->hw.conf.channel->center_freq, |
| ifsta->ssid, ifsta->ssid_len); |
| if (bss) { |
| sta->last_signal = bss->signal; |
| sta->last_qual = bss->qual; |
| sta->last_noise = bss->noise; |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| err = sta_info_insert(sta); |
| if (err) { |
| printk(KERN_DEBUG "%s: failed to insert STA entry for" |
| " the AP (error %d)\n", sdata->dev->name, err); |
| rcu_read_unlock(); |
| return; |
| } |
| /* update new sta with its last rx activity */ |
| sta->last_rx = jiffies; |
| } |
| |
| /* |
| * FIXME: Do we really need to update the sta_info's information here? |
| * We already know about the AP (we found it in our list) so it |
| * should already be filled with the right info, no? |
| * As is stands, all this is racy because typically we assume |
| * the information that is filled in here (except flags) doesn't |
| * change while a STA structure is alive. As such, it should move |
| * to between the sta_info_alloc() and sta_info_insert() above. |
| */ |
| |
| set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
| WLAN_STA_AUTHORIZED); |
| |
| rates = 0; |
| basic_rates = 0; |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| for (i = 0; i < elems.supp_rates_len; i++) { |
| int rate = (elems.supp_rates[i] & 0x7f) * 5; |
| |
| if (rate > 110) |
| have_higher_than_11mbit = true; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) |
| rates |= BIT(j); |
| if (elems.supp_rates[i] & 0x80) |
| basic_rates |= BIT(j); |
| } |
| } |
| |
| for (i = 0; i < elems.ext_supp_rates_len; i++) { |
| int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; |
| |
| if (rate > 110) |
| have_higher_than_11mbit = true; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) |
| rates |= BIT(j); |
| if (elems.ext_supp_rates[i] & 0x80) |
| basic_rates |= BIT(j); |
| } |
| } |
| |
| sta->supp_rates[local->hw.conf.channel->band] = rates; |
| sdata->basic_rates = basic_rates; |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| |
| if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
| (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
| struct ieee80211_ht_bss_info bss_info; |
| ieee80211_ht_cap_ie_to_ht_info( |
| (struct ieee80211_ht_cap *) |
| elems.ht_cap_elem, &sta->ht_info); |
| ieee80211_ht_addt_info_ie_to_ht_bss_info( |
| (struct ieee80211_ht_addt_info *) |
| elems.ht_info_elem, &bss_info); |
| ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); |
| } |
| |
| rate_control_rate_init(sta, local); |
| |
| if (elems.wmm_param) { |
| set_sta_flags(sta, WLAN_STA_WME); |
| rcu_read_unlock(); |
| ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
| elems.wmm_param_len); |
| } else |
| rcu_read_unlock(); |
| |
| /* set AID and assoc capability, |
| * ieee80211_set_associated() will tell the driver */ |
| bss_conf->aid = aid; |
| bss_conf->assoc_capability = capab_info; |
| ieee80211_set_associated(sdata, ifsta, 1); |
| |
| ieee80211_associated(sdata, ifsta); |
| } |
| |
| |
| /* Caller must hold local->sta_bss_lock */ |
| static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local, |
| struct ieee80211_sta_bss *bss) |
| { |
| u8 hash_idx; |
| |
| if (bss_mesh_cfg(bss)) |
| hash_idx = mesh_id_hash(bss_mesh_id(bss), |
| bss_mesh_id_len(bss)); |
| else |
| hash_idx = STA_HASH(bss->bssid); |
| |
| bss->hnext = local->sta_bss_hash[hash_idx]; |
| local->sta_bss_hash[hash_idx] = bss; |
| } |
| |
| |
| /* Caller must hold local->sta_bss_lock */ |
| static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, |
| struct ieee80211_sta_bss *bss) |
| { |
| 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 ieee80211_sub_if_data *sdata, u8 *bssid, int freq, |
| u8 *ssid, u8 ssid_len) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_sta_bss *bss; |
| |
| bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
| if (!bss) |
| return NULL; |
| atomic_inc(&bss->users); |
| atomic_inc(&bss->users); |
| memcpy(bss->bssid, bssid, ETH_ALEN); |
| bss->freq = freq; |
| if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
| memcpy(bss->ssid, ssid, ssid_len); |
| bss->ssid_len = ssid_len; |
| } |
| |
| 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(local, bss); |
| spin_unlock_bh(&local->sta_bss_lock); |
| return bss; |
| } |
| |
| static struct ieee80211_sta_bss * |
| ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
| u8 *ssid, u8 ssid_len) |
| { |
| struct ieee80211_sta_bss *bss; |
| |
| spin_lock_bh(&local->sta_bss_lock); |
| bss = local->sta_bss_hash[STA_HASH(bssid)]; |
| while (bss) { |
| if (!bss_mesh_cfg(bss) && |
| !memcmp(bss->bssid, bssid, ETH_ALEN) && |
| bss->freq == freq && |
| bss->ssid_len == ssid_len && |
| (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { |
| atomic_inc(&bss->users); |
| break; |
| } |
| bss = bss->hnext; |
| } |
| spin_unlock_bh(&local->sta_bss_lock); |
| return bss; |
| } |
| |
| #ifdef CONFIG_MAC80211_MESH |
| static struct ieee80211_sta_bss * |
| ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
| u8 *mesh_cfg, int freq) |
| { |
| struct ieee80211_sta_bss *bss; |
| |
| spin_lock_bh(&local->sta_bss_lock); |
| bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; |
| while (bss) { |
| if (bss_mesh_cfg(bss) && |
| !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && |
| bss->freq == freq && |
| mesh_id_len == bss->mesh_id_len && |
| (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, |
| mesh_id_len))) { |
| atomic_inc(&bss->users); |
| break; |
| } |
| bss = bss->hnext; |
| } |
| spin_unlock_bh(&local->sta_bss_lock); |
| return bss; |
| } |
| |
| static struct ieee80211_sta_bss * |
| ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
| u8 *mesh_cfg, int mesh_config_len, int freq) |
| { |
| struct ieee80211_sta_bss *bss; |
| |
| if (mesh_config_len != MESH_CFG_LEN) |
| return NULL; |
| |
| bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
| if (!bss) |
| return NULL; |
| |
| bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
| if (!bss->mesh_cfg) { |
| kfree(bss); |
| return NULL; |
| } |
| |
| if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { |
| bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); |
| if (!bss->mesh_id) { |
| kfree(bss->mesh_cfg); |
| kfree(bss); |
| return NULL; |
| } |
| memcpy(bss->mesh_id, mesh_id, mesh_id_len); |
| } |
| |
| atomic_inc(&bss->users); |
| atomic_inc(&bss->users); |
| memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
| bss->mesh_id_len = mesh_id_len; |
| bss->freq = freq; |
| 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(local, bss); |
| spin_unlock_bh(&local->sta_bss_lock); |
| return bss; |
| } |
| #endif |
| |
| static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) |
| { |
| kfree(bss->ies); |
| kfree(bss_mesh_id(bss)); |
| kfree(bss_mesh_cfg(bss)); |
| kfree(bss); |
| } |
| |
| |
| static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
| struct ieee80211_sta_bss *bss) |
| { |
| local_bh_disable(); |
| if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) { |
| local_bh_enable(); |
| return; |
| } |
| |
| __ieee80211_rx_bss_hash_del(local, bss); |
| list_del(&bss->list); |
| spin_unlock_bh(&local->sta_bss_lock); |
| ieee80211_rx_bss_free(bss); |
| } |
| |
| |
| void ieee80211_rx_bss_list_init(struct ieee80211_local *local) |
| { |
| spin_lock_init(&local->sta_bss_lock); |
| INIT_LIST_HEAD(&local->sta_bss_list); |
| } |
| |
| |
| void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local) |
| { |
| struct ieee80211_sta_bss *bss, *tmp; |
| |
| list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| |
| static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_sta_bss *bss) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int res, rates, i, j; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos; |
| struct ieee80211_supported_band *sband; |
| union iwreq_data wrqu; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| /* Remove possible STA entries from other IBSS networks. */ |
| sta_info_flush_delayed(sdata); |
| |
| 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(sdata, IEEE80211_IFCC_BSSID); |
| if (res) |
| return res; |
| |
| local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; |
| |
| sdata->drop_unencrypted = bss->capability & |
| WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
| |
| res = ieee80211_set_freq(sdata, bss->freq); |
| |
| if (res) |
| return res; |
| |
| /* Build IBSS probe response */ |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
| if (skb) { |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) |
| skb_put(skb, 24 + sizeof(mgmt->u.beacon)); |
| memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_PROBE_RESP); |
| memset(mgmt->da, 0xff, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->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.timestamp = cpu_to_le64(bss->timestamp); |
| 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); |
| |
| if (bss->band == IEEE80211_BAND_2GHZ) { |
| pos = skb_put(skb, 2 + 1); |
| *pos++ = WLAN_EID_DS_PARAMS; |
| *pos++ = 1; |
| *pos++ = ieee80211_frequency_to_channel(bss->freq); |
| } |
| |
| 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); |
| } |
| |
| ifsta->probe_resp = skb; |
| |
| ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
| } |
| |
| rates = 0; |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| for (i = 0; i < bss->supp_rates_len; i++) { |
| int bitrate = (bss->supp_rates[i] & 0x7f) * 5; |
| for (j = 0; j < sband->n_bitrates; j++) |
| if (sband->bitrates[j].bitrate == bitrate) |
| rates |= BIT(j); |
| } |
| ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
| |
| ieee80211_sta_def_wmm_params(sdata, bss, 1); |
| |
| ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
| mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
| |
| memset(&wrqu, 0, sizeof(wrqu)); |
| memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); |
| wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
| |
| return res; |
| } |
| |
| u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
| struct ieee802_11_elems *elems, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_rate *bitrates; |
| size_t num_rates; |
| u64 supp_rates; |
| int i, j; |
| sband = local->hw.wiphy->bands[band]; |
| |
| if (!sband) { |
| WARN_ON(1); |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| } |
| |
| bitrates = sband->bitrates; |
| num_rates = sband->n_bitrates; |
| 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); |
| for (j = 0; j < num_rates; j++) |
| if (bitrates[j].bitrate == own_rate) |
| supp_rates |= BIT(j); |
| } |
| return supp_rates; |
| } |
| |
| static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_rate *bitrates; |
| u64 mandatory_rates; |
| enum ieee80211_rate_flags mandatory_flag; |
| int i; |
| |
| sband = local->hw.wiphy->bands[band]; |
| if (!sband) { |
| WARN_ON(1); |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| } |
| |
| if (band == IEEE80211_BAND_2GHZ) |
| mandatory_flag = IEEE80211_RATE_MANDATORY_B; |
| else |
| mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
| |
| bitrates = sband->bitrates; |
| mandatory_rates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) |
| if (bitrates[i].flags & mandatory_flag) |
| mandatory_rates |= BIT(i); |
| return mandatory_rates; |
| } |
| |
| static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status, |
| struct ieee802_11_elems *elems) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int freq, clen; |
| struct ieee80211_sta_bss *bss; |
| struct sta_info *sta; |
| struct ieee80211_channel *channel; |
| u64 beacon_timestamp, rx_timestamp; |
| u64 supp_rates = 0; |
| bool beacon = ieee80211_is_beacon(mgmt->frame_control); |
| enum ieee80211_band band = rx_status->band; |
| DECLARE_MAC_BUF(mac); |
| DECLARE_MAC_BUF(mac2); |
| |
| if (elems->ds_params && elems->ds_params_len == 1) |
| freq = ieee80211_channel_to_frequency(elems->ds_params[0]); |
| else |
| freq = rx_status->freq; |
| |
| channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| |
| if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| return; |
| |
| if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && |
| elems->mesh_config && mesh_matches_local(elems, sdata)) { |
| supp_rates = ieee80211_sta_get_rates(local, elems, band); |
| |
| mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
| mesh_peer_accepts_plinks(elems)); |
| } |
| |
| if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && |
| memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
| supp_rates = ieee80211_sta_get_rates(local, elems, band); |
| |
| rcu_read_lock(); |
| |
| sta = sta_info_get(local, mgmt->sa); |
| if (sta) { |
| u64 prev_rates; |
| |
| prev_rates = sta->supp_rates[band]; |
| /* make sure mandatory rates are always added */ |
| sta->supp_rates[band] = supp_rates | |
| ieee80211_sta_get_mandatory_rates(local, band); |
| |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| if (sta->supp_rates[band] != prev_rates) |
| printk(KERN_DEBUG "%s: updated supp_rates set " |
| "for %s based on beacon info (0x%llx | " |
| "0x%llx -> 0x%llx)\n", |
| sdata->dev->name, print_mac(mac, sta->addr), |
| (unsigned long long) prev_rates, |
| (unsigned long long) supp_rates, |
| (unsigned long long) sta->supp_rates[band]); |
| #endif |
| } else { |
| ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, |
| mgmt->sa, supp_rates); |
| } |
| |
| rcu_read_unlock(); |
| } |
| |
| #ifdef CONFIG_MAC80211_MESH |
| if (elems->mesh_config) |
| bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id, |
| elems->mesh_id_len, elems->mesh_config, freq); |
| else |
| #endif |
| bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq, |
| elems->ssid, elems->ssid_len); |
| if (!bss) { |
| #ifdef CONFIG_MAC80211_MESH |
| if (elems->mesh_config) |
| bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id, |
| elems->mesh_id_len, elems->mesh_config, |
| elems->mesh_config_len, freq); |
| else |
| #endif |
| bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq, |
| elems->ssid, elems->ssid_len); |
| 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 |
| } |
| |
| /* save the ERP value so that it is available at association time */ |
| if (elems->erp_info && elems->erp_info_len >= 1) { |
| bss->erp_value = elems->erp_info[0]; |
| bss->has_erp_value = 1; |
| } |
| |
| bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
| bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); |
| |
| if (elems->tim) { |
| struct ieee80211_tim_ie *tim_ie = |
| (struct ieee80211_tim_ie *)elems->tim; |
| bss->dtim_period = tim_ie->dtim_period; |
| } |
| |
| /* set default value for buggy APs */ |
| if (!elems->tim || bss->dtim_period == 0) |
| bss->dtim_period = 1; |
| |
| 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; |
| } |
| |
| bss->band = band; |
| |
| beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
| |
| bss->timestamp = beacon_timestamp; |
| bss->last_update = jiffies; |
| bss->signal = rx_status->signal; |
| bss->noise = rx_status->noise; |
| bss->qual = rx_status->qual; |
| if (!beacon) |
| bss->last_probe_resp = jiffies; |
| /* |
| * In STA mode, the remaining parameters should not be overridden |
| * by beacons because they're not necessarily accurate there. |
| */ |
| if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
| bss->last_probe_resp && beacon) { |
| ieee80211_rx_bss_put(local, bss); |
| return; |
| } |
| |
| if (bss->ies == NULL || bss->ies_len < elems->total_len) { |
| kfree(bss->ies); |
| bss->ies = kmalloc(elems->total_len, GFP_ATOMIC); |
| } |
| if (bss->ies) { |
| memcpy(bss->ies, elems->ie_start, elems->total_len); |
| bss->ies_len = elems->total_len; |
| } else |
| bss->ies_len = 0; |
| |
| bss->wmm_used = elems->wmm_param || elems->wmm_info; |
| |
| /* check if we need to merge IBSS */ |
| if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && |
| !local->sta_sw_scanning && !local->sta_hw_scanning && |
| bss->capability & WLAN_CAPABILITY_IBSS && |
| bss->freq == local->oper_channel->center_freq && |
| elems->ssid_len == sdata->u.sta.ssid_len && |
| memcmp(elems->ssid, sdata->u.sta.ssid, |
| sdata->u.sta.ssid_len) == 0) { |
| if (rx_status->flag & RX_FLAG_TSFT) { |
| /* in order for correct IBSS merging we need mactime |
| * |
| * since mactime is defined as the time the first data |
| * symbol of the frame hits the PHY, and the timestamp |
| * of the beacon is defined as "the time that the data |
| * symbol containing the first bit of the timestamp is |
| * transmitted to the PHY plus the transmitting STA’s |
| * delays through its local PHY from the MAC-PHY |
| * interface to its interface with the WM" |
| * (802.11 11.1.2) - equals the time this bit arrives at |
| * the receiver - we have to take into account the |
| * offset between the two. |
| * e.g: at 1 MBit that means mactime is 192 usec earlier |
| * (=24 bytes * 8 usecs/byte) than the beacon timestamp. |
| */ |
| int rate = local->hw.wiphy->bands[band]-> |
| bitrates[rx_status->rate_idx].bitrate; |
| rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); |
| } else if (local && local->ops && local->ops->get_tsf) |
| /* second best option: get current TSF */ |
| rx_timestamp = local->ops->get_tsf(local_to_hw(local)); |
| else |
| /* can't merge without knowing the TSF */ |
| rx_timestamp = -1LLU; |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "RX beacon SA=%s BSSID=" |
| "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", |
| print_mac(mac, mgmt->sa), |
| print_mac(mac2, mgmt->bssid), |
| (unsigned long long)rx_timestamp, |
| (unsigned long long)beacon_timestamp, |
| (unsigned long long)(rx_timestamp - beacon_timestamp), |
| jiffies); |
| #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| if (beacon_timestamp > rx_timestamp) { |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: beacon TSF higher than " |
| "local TSF - IBSS merge with BSSID %s\n", |
| sdata->dev->name, print_mac(mac, mgmt->bssid)); |
| #endif |
| ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
| ieee80211_ibss_add_sta(sdata, NULL, |
| mgmt->bssid, mgmt->sa, |
| supp_rates); |
| } |
| } |
| |
| ieee80211_rx_bss_put(local, bss); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| size_t baselen; |
| struct ieee802_11_elems elems; |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| |
| if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
| return; /* ignore ProbeResp to foreign address */ |
| |
| baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| if (baselen > len) |
| return; |
| |
| ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| &elems); |
| |
| ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
| |
| /* direct probe may be part of the association flow */ |
| if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, |
| &ifsta->request)) { |
| printk(KERN_DEBUG "%s direct probe responded\n", |
| sdata->dev->name); |
| ieee80211_authenticate(sdata, ifsta); |
| } |
| } |
| |
| |
| static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_if_sta *ifsta; |
| size_t baselen; |
| struct ieee802_11_elems elems; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_conf *conf = &local->hw.conf; |
| u32 changed = 0; |
| |
| /* Process beacon from the current BSS */ |
| baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
| if (baselen > len) |
| return; |
| |
| ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
| |
| ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| return; |
| ifsta = &sdata->u.sta; |
| |
| if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
| memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
| return; |
| |
| /* Do not send changes to driver if we are scanning. This removes |
| * requirement that a driver's bss_info_changed/conf_tx functions |
| * need to be atomic. |
| * This is really ugly code, we should rewrite scanning and make |
| * all this more understandable for humans. |
| */ |
| if (local->sta_sw_scanning || local->sta_hw_scanning) |
| return; |
| |
| ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
| elems.wmm_param_len); |
| |
| if (elems.erp_info && elems.erp_info_len >= 1) |
| changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
| else { |
| u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); |
| changed |= ieee80211_handle_protect_preamb(sdata, false, |
| (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); |
| } |
| |
| if (elems.ht_cap_elem && elems.ht_info_elem && |
| elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
| struct ieee80211_ht_bss_info bss_info; |
| |
| ieee80211_ht_addt_info_ie_to_ht_bss_info( |
| (struct ieee80211_ht_addt_info *) |
| elems.ht_info_elem, &bss_info); |
| changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
| &bss_info); |
| } |
| |
| ieee80211_bss_info_change_notify(sdata, changed); |
| } |
| |
| |
| static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int tx_last_beacon; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *resp; |
| u8 *pos, *end; |
| DECLARE_MAC_BUF(mac); |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| DECLARE_MAC_BUF(mac2); |
| DECLARE_MAC_BUF(mac3); |
| #endif |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
| ifsta->state != IEEE80211_STA_MLME_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_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
| "%s (tx_last_beacon=%d)\n", |
| sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
| print_mac(mac3, mgmt->bssid), tx_last_beacon); |
| #endif /* CONFIG_MAC80211_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) { |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " |
| "from %s\n", |
| sdata->dev->name, print_mac(mac, mgmt->sa)); |
| #endif |
| 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_KERNEL); |
| if (!skb) |
| return; |
| |
| resp = (struct ieee80211_mgmt *) skb->data; |
| memcpy(resp->da, mgmt->sa, ETH_ALEN); |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
| sdata->dev->name, print_mac(mac, resp->da)); |
| #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta, |
| struct ieee80211_mgmt *mgmt, |
| size_t len, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_local *local = sdata->local; |
| |
| /* all categories we currently handle have action_code */ |
| if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| return; |
| |
| switch (mgmt->u.action.category) { |
| case WLAN_CATEGORY_SPECTRUM_MGMT: |
| if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) |
| break; |
| switch (mgmt->u.action.u.measurement.action_code) { |
| case WLAN_ACTION_SPCT_MSR_REQ: |
| if (len < (IEEE80211_MIN_ACTION_SIZE + |
| sizeof(mgmt->u.action.u.measurement))) |
| break; |
| ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
| break; |
| } |
| break; |
| case WLAN_CATEGORY_BACK: |
| switch (mgmt->u.action.u.addba_req.action_code) { |
| case WLAN_ACTION_ADDBA_REQ: |
| if (len < (IEEE80211_MIN_ACTION_SIZE + |
| sizeof(mgmt->u.action.u.addba_req))) |
| break; |
| ieee80211_sta_process_addba_request(local, mgmt, len); |
| break; |
| case WLAN_ACTION_ADDBA_RESP: |
| if (len < (IEEE80211_MIN_ACTION_SIZE + |
| sizeof(mgmt->u.action.u.addba_resp))) |
| break; |
| ieee80211_sta_process_addba_resp(local, mgmt, len); |
| break; |
| case WLAN_ACTION_DELBA: |
| if (len < (IEEE80211_MIN_ACTION_SIZE + |
| sizeof(mgmt->u.action.u.delba))) |
| break; |
| ieee80211_sta_process_delba(sdata, mgmt, len); |
| break; |
| } |
| break; |
| case PLINK_CATEGORY: |
| if (ieee80211_vif_is_mesh(&sdata->vif)) |
| mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
| break; |
| case MESH_PATH_SEL_CATEGORY: |
| if (ieee80211_vif_is_mesh(&sdata->vif)) |
| mesh_rx_path_sel_frame(sdata, mgmt, len); |
| break; |
| } |
| } |
| |
| void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_sta *ifsta; |
| struct ieee80211_mgmt *mgmt; |
| u16 fc; |
| |
| if (skb->len < 24) |
| goto fail; |
| |
| 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: |
| case IEEE80211_STYPE_PROBE_RESP: |
| case IEEE80211_STYPE_BEACON: |
| case IEEE80211_STYPE_ACTION: |
| memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
| case IEEE80211_STYPE_AUTH: |
| case IEEE80211_STYPE_ASSOC_RESP: |
| case IEEE80211_STYPE_REASSOC_RESP: |
| case IEEE80211_STYPE_DEAUTH: |
| case IEEE80211_STYPE_DISASSOC: |
| skb_queue_tail(&ifsta->skb_queue, skb); |
| queue_work(local->hw.workqueue, &ifsta->work); |
| return; |
| } |
| |
| fail: |
| kfree_skb(skb); |
| } |
| |
| static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_rx_status *rx_status; |
| struct ieee80211_if_sta *ifsta; |
| struct ieee80211_mgmt *mgmt; |
| u16 fc; |
| |
| ifsta = &sdata->u.sta; |
| |
| rx_status = (struct ieee80211_rx_status *) skb->cb; |
| 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(sdata, ifsta, mgmt, skb->len, |
| rx_status); |
| break; |
| case IEEE80211_STYPE_PROBE_RESP: |
| ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
| break; |
| case IEEE80211_STYPE_BEACON: |
| ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
| break; |
| case IEEE80211_STYPE_AUTH: |
| ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_ASSOC_RESP: |
| ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
| break; |
| case IEEE80211_STYPE_REASSOC_RESP: |
| ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
| break; |
| case IEEE80211_STYPE_DEAUTH: |
| ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_DISASSOC: |
| ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
| break; |
| case IEEE80211_STYPE_ACTION: |
| ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
| break; |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| |
| ieee80211_rx_result |
| ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_mgmt *mgmt; |
| __le16 fc; |
| |
| if (skb->len < 2) |
| return RX_DROP_UNUSABLE; |
| |
| mgmt = (struct ieee80211_mgmt *) skb->data; |
| fc = mgmt->frame_control; |
| |
| if (ieee80211_is_ctl(fc)) |
| return RX_CONTINUE; |
| |
| if (skb->len < 24) |
| return RX_DROP_MONITOR; |
| |
| if (ieee80211_is_probe_resp(fc)) { |
| ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
| dev_kfree_skb(skb); |
| return RX_QUEUED; |
| } |
| |
| if (ieee80211_is_beacon(fc)) { |
| ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
| dev_kfree_skb(skb); |
| return RX_QUEUED; |
| } |
| |
| return RX_CONTINUE; |
| } |
| |
| |
| static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int active = 0; |
| struct sta_info *sta; |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| if (sta->sdata == sdata && |
| time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
| jiffies)) { |
| active++; |
| break; |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| return active; |
| } |
| |
| |
| static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta, *tmp; |
| LIST_HEAD(tmp_list); |
| DECLARE_MAC_BUF(mac); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->sta_lock, flags); |
| list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
| if (time_after(jiffies, sta->last_rx + exp_time)) { |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
| sdata->dev->name, print_mac(mac, sta->addr)); |
| #endif |
| __sta_info_unlink(&sta); |
| if (sta) |
| list_add(&sta->list, &tmp_list); |
| } |
| spin_unlock_irqrestore(&local->sta_lock, flags); |
| |
| list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
| sta_info_destroy(sta); |
| } |
| |
| |
| static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
| |
| ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
| if (ieee80211_sta_active_ibss(sdata)) |
| return; |
| |
| printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " |
| "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
| ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); |
| } |
| |
| |
| #ifdef CONFIG_MAC80211_MESH |
| static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| bool free_plinks; |
| |
| ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
| mesh_path_expire(sdata); |
| |
| free_plinks = mesh_plink_availables(sdata); |
| if (free_plinks != sdata->u.sta.accepting_plinks) |
| ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
| |
| mod_timer(&ifsta->timer, jiffies + |
| IEEE80211_MESH_HOUSEKEEPING_INTERVAL); |
| } |
| |
| |
| void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_sta *ifsta; |
| ifsta = &sdata->u.sta; |
| ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
| ieee80211_sta_timer((unsigned long)sdata); |
| ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
| } |
| #endif |
| |
| |
| void ieee80211_sta_timer(unsigned long data) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| (struct ieee80211_sub_if_data *) data; |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| struct ieee80211_local *local = sdata->local; |
| |
| set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
| queue_work(local->hw.workqueue, &ifsta->work); |
| } |
| |
| void ieee80211_sta_work(struct work_struct *work) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| container_of(work, struct ieee80211_sub_if_data, u.sta.work); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_sta *ifsta; |
| struct sk_buff *skb; |
| |
| if (!netif_running(sdata->dev)) |
| return; |
| |
| if (local->sta_sw_scanning || local->sta_hw_scanning) |
| return; |
| |
| if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && |
| sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
| sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) |
| return; |
| ifsta = &sdata->u.sta; |
| |
| while ((skb = skb_dequeue(&ifsta->skb_queue))) |
| ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| |
| #ifdef CONFIG_MAC80211_MESH |
| if (ifsta->preq_queue_len && |
| time_after(jiffies, |
| ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) |
| mesh_path_start_discovery(sdata); |
| #endif |
| |
| if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
| ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
| ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && |
| test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { |
| if (ifsta->scan_ssid_len) |
| ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
| else |
| ieee80211_sta_start_scan(sdata, NULL, 0); |
| return; |
| } |
| |
| if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
| if (ieee80211_sta_config_auth(sdata, ifsta)) |
| return; |
| clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
| } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) |
| return; |
| |
| switch (ifsta->state) { |
| case IEEE80211_STA_MLME_DISABLED: |
| break; |
| case IEEE80211_STA_MLME_DIRECT_PROBE: |
| ieee80211_direct_probe(sdata, ifsta); |
| break; |
| case IEEE80211_STA_MLME_AUTHENTICATE: |
| ieee80211_authenticate(sdata, ifsta); |
| break; |
| case IEEE80211_STA_MLME_ASSOCIATE: |
| ieee80211_associate(sdata, ifsta); |
| break; |
| case IEEE80211_STA_MLME_ASSOCIATED: |
| ieee80211_associated(sdata, ifsta); |
| break; |
| case IEEE80211_STA_MLME_IBSS_SEARCH: |
| ieee80211_sta_find_ibss(sdata, ifsta); |
| break; |
| case IEEE80211_STA_MLME_IBSS_JOINED: |
| ieee80211_sta_merge_ibss(sdata, ifsta); |
| break; |
| #ifdef CONFIG_MAC80211_MESH |
| case IEEE80211_STA_MLME_MESH_UP: |
| ieee80211_mesh_housekeeping(sdata, ifsta); |
| break; |
| #endif |
| default: |
| WARN_ON(1); |
| break; |
| } |
| |
| if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
| printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
| "mixed-cell disabled - disassociate\n", sdata->dev->name); |
| |
| ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED); |
| ieee80211_set_disassoc(sdata, ifsta, 0); |
| } |
| } |
| |
| |
| static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| |
| 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; |
| ifsta->auth_transaction = -1; |
| ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
| ifsta->assoc_scan_tries = 0; |
| ifsta->direct_probe_tries = 0; |
| ifsta->auth_tries = 0; |
| ifsta->assoc_tries = 0; |
| netif_carrier_off(sdata->dev); |
| } |
| |
| |
| void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| return; |
| |
| if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
| IEEE80211_STA_AUTO_BSSID_SEL)) && |
| (ifsta->flags & (IEEE80211_STA_SSID_SET | |
| IEEE80211_STA_AUTO_SSID_SEL))) { |
| set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
| queue_work(local->hw.workqueue, &ifsta->work); |
| } |
| } |
| |
| static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, |
| const char *ssid, int ssid_len) |
| { |
| int tmp, hidden_ssid; |
| |
| if (ssid_len == ifsta->ssid_len && |
| !memcmp(ifsta->ssid, ssid, ssid_len)) |
| return 1; |
| |
| if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
| return 0; |
| |
| hidden_ssid = 1; |
| tmp = ssid_len; |
| while (tmp--) { |
| if (ssid[tmp] != '\0') { |
| hidden_ssid = 0; |
| break; |
| } |
| } |
| |
| if (hidden_ssid && ifsta->ssid_len == ssid_len) |
| return 1; |
| |
| if (ssid_len == 1 && ssid[0] == ' ') |
| return 1; |
| |
| return 0; |
| } |
| |
| static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_sta_bss *bss, *selected = NULL; |
| int top_rssi = 0, freq; |
| |
| spin_lock_bh(&local->sta_bss_lock); |
| freq = local->oper_channel->center_freq; |
| list_for_each_entry(bss, &local->sta_bss_list, list) { |
| if (!(bss->capability & WLAN_CAPABILITY_ESS)) |
| continue; |
| |
| if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
| IEEE80211_STA_AUTO_BSSID_SEL | |
| IEEE80211_STA_AUTO_CHANNEL_SEL)) && |
| (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ |
| !!sdata->default_key)) |
| continue; |
| |
| if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
| bss->freq != freq) |
| continue; |
| |
| if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
| memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
| continue; |
| |
| if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
| !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
| continue; |
| |
| if (!selected || top_rssi < bss->signal) { |
| selected = bss; |
| top_rssi = bss->signal; |
| } |
| } |
| if (selected) |
| atomic_inc(&selected->users); |
| spin_unlock_bh(&local->sta_bss_lock); |
| |
| if (selected) { |
| ieee80211_set_freq(sdata, selected->freq); |
| if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
| ieee80211_sta_set_ssid(sdata, selected->ssid, |
| selected->ssid_len); |
| ieee80211_sta_set_bssid(sdata, selected->bssid); |
| ieee80211_sta_def_wmm_params(sdata, selected, 0); |
| |
| /* Send out direct probe if no probe resp was received or |
| * the one we have is outdated |
| */ |
| if (!selected->last_probe_resp || |
| time_after(jiffies, selected->last_probe_resp |
| + IEEE80211_SCAN_RESULT_EXPIRE)) |
| ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
| else |
| ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| |
| ieee80211_rx_bss_put(local, selected); |
| ieee80211_sta_reset_auth(sdata, ifsta); |
| return 0; |
| } else { |
| if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
| ifsta->assoc_scan_tries++; |
| if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
| ieee80211_sta_start_scan(sdata, NULL, 0); |
| else |
| ieee80211_sta_start_scan(sdata, ifsta->ssid, |
| ifsta->ssid_len); |
| ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
| set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
| } else |
| ifsta->state = IEEE80211_STA_MLME_DISABLED; |
| } |
| return -1; |
| } |
| |
| |
| static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_sta_bss *bss; |
| struct ieee80211_supported_band *sband; |
| u8 bssid[ETH_ALEN], *pos; |
| int i; |
| int ret; |
| DECLARE_MAC_BUF(mac); |
| |
| #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] ^= sdata->dev->dev_addr[i]; |
| bssid[0] &= ~0x01; |
| bssid[0] |= 0x02; |
| #endif |
| |
| printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
| sdata->dev->name, print_mac(mac, bssid)); |
| |
| bss = ieee80211_rx_bss_add(sdata, bssid, |
| local->hw.conf.channel->center_freq, |
| sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
| if (!bss) |
| return -ENOMEM; |
| |
| bss->band = local->hw.conf.channel->band; |
| sband = local->hw.wiphy->bands[bss->band]; |
| |
| if (local->hw.conf.beacon_int == 0) |
| local->hw.conf.beacon_int = 100; |
| bss->beacon_int = local->hw.conf.beacon_int; |
| 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 = sband->n_bitrates; |
| pos = bss->supp_rates; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| int rate = sband->bitrates[i].bitrate; |
| *pos++ = (u8) (rate / 5); |
| } |
| |
| ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
| ieee80211_rx_bss_put(local, bss); |
| return ret; |
| } |
| |
| |
| static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_if_sta *ifsta) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_sta_bss *bss; |
| int found = 0; |
| u8 bssid[ETH_ALEN]; |
| int active_ibss; |
| DECLARE_MAC_BUF(mac); |
| DECLARE_MAC_BUF(mac2); |
| |
| if (ifsta->ssid_len == 0) |
| return -EINVAL; |
| |
| active_ibss = ieee80211_sta_active_ibss(sdata); |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", |
| sdata->dev->name, active_ibss); |
| #endif /* CONFIG_MAC80211_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_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG " bssid=%s found\n", |
| print_mac(mac, bss->bssid)); |
| #endif /* CONFIG_MAC80211_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_MAC80211_IBSS_DEBUG |
| if (found) |
| printk(KERN_DEBUG " sta_find_ibss: selected %s current " |
| "%s\n", print_mac(mac, bssid), |
| print_mac(mac2, ifsta->bssid)); |
| #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| |
| if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { |
| int ret; |
| int search_freq; |
| |
| if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
| search_freq = bss->freq; |
| else |
| search_freq = local->hw.conf.channel->center_freq; |
| |
| bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
| ifsta->ssid, ifsta->ssid_len); |
| if (!bss) |
| goto dont_join; |
| |
| printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
| " based on configured SSID\n", |
| sdata->dev->name, print_mac(mac, bssid)); |
| ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
| ieee80211_rx_bss_put(local, bss); |
| return ret; |
| } |
| |
| dont_join: |
| #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| printk(KERN_DEBUG " did not try to join ibss\n"); |
| #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| |
| /* Selected IBSS not found in current scan results - try to scan */ |
| if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
| !ieee80211_sta_active_ibss(sdata)) { |
| mod_timer(&ifsta->timer, jiffies + |
| 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", sdata->dev->name); |
| return ieee80211_sta_req_scan(sdata, ifsta->ssid, |
| ifsta->ssid_len); |
| } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
| int interval = IEEE80211_SCAN_INTERVAL; |
| |
| if (time_after(jiffies, ifsta->ibss_join_req + |
| IEEE80211_IBSS_JOIN_TIMEOUT)) { |
| if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
| (!(local->oper_channel->flags & |
| IEEE80211_CHAN_NO_IBSS))) |
| return ieee80211_sta_create_ibss(sdata, ifsta); |
| if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
| printk(KERN_DEBUG "%s: IBSS not allowed on" |
| " %d MHz\n", sdata->dev->name, |
| local->hw.conf.channel->center_freq); |
| } |
| |
| /* No IBSS found - decrease scan interval and continue |
| * scanning. */ |
| interval = IEEE80211_SCAN_INTERVAL_SLOW; |
| } |
| |
| ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
| mod_timer(&ifsta->timer, jiffies + interval); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| |
| int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
| { |
| struct ieee80211_if_sta *ifsta; |
| int res; |
| |
| if (len > IEEE80211_MAX_SSID_LEN) |
| return -EINVAL; |
| |
| ifsta = &sdata->u.sta; |
| |
| if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
| memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); |
| memcpy(ifsta->ssid, ssid, len); |
| ifsta->ssid_len = len; |
| ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
| |
| res = 0; |
| /* |
| * Hack! MLME code needs to be cleaned up to have different |
| * entry points for configuration and internal selection change |
| */ |
| if (netif_running(sdata->dev)) |
| res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); |
| if (res) { |
| printk(KERN_DEBUG "%s: Failed to config new SSID to " |
| "the low-level driver\n", sdata->dev->name); |
| return res; |
| } |
| } |
| |
| if (len) |
| ifsta->flags |= IEEE80211_STA_SSID_SET; |
| else |
| ifsta->flags &= ~IEEE80211_STA_SSID_SET; |
| |
| if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
| !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
| ifsta->ibss_join_req = jiffies; |
| ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
| return ieee80211_sta_find_ibss(sdata, ifsta); |
| } |
| |
| return 0; |
| } |
| |
| |
| int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
| { |
| 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 ieee80211_sub_if_data *sdata, u8 *bssid) |
| { |
| struct ieee80211_if_sta *ifsta; |
| int res; |
| |
| ifsta = &sdata->u.sta; |
| |
| if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { |
| memcpy(ifsta->bssid, bssid, ETH_ALEN); |
| res = 0; |
| /* |
| * Hack! See also ieee80211_sta_set_ssid. |
| */ |
| if (netif_running(sdata->dev)) |
| res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
| if (res) { |
| printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
| "the low-level driver\n", sdata->dev->name); |
| return res; |
| } |
| } |
| |
| if (is_valid_ether_addr(bssid)) |
| ifsta->flags |= IEEE80211_STA_BSSID_SET; |
| else |
| ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
| |
| return 0; |
| } |
| |
| |
| static void ieee80211_send_nullfunc(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata, |
| int powersave) |
| { |
| struct sk_buff *skb; |
| struct ieee80211_hdr *nullfunc; |
| __le16 fc; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); |
| memset(nullfunc, 0, 24); |
| fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
| IEEE80211_FCTL_TODS); |
| if (powersave) |
| fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
| nullfunc->frame_control = fc; |
| memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); |
| memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); |
| |
| ieee80211_sta_tx(sdata, skb, 0); |
| } |
| |
| |
| static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
| { |
| if (sdata->vif.type == IEEE80211_IF_TYPE_STA || |
| ieee80211_vif_is_mesh(&sdata->vif)) |
| ieee80211_sta_timer((unsigned long)sdata); |
| } |
| |
| void ieee80211_scan_completed(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct net_device *dev = local->scan_dev; |
| struct ieee80211_sub_if_data *sdata; |
| union iwreq_data wrqu; |
| |
| local->last_scan_completed = jiffies; |
| memset(&wrqu, 0, sizeof(wrqu)); |
| wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); |
| |
| if (local->sta_hw_scanning) { |
| local->sta_hw_scanning = 0; |
| if (ieee80211_hw_config(local)) |
| printk(KERN_DEBUG "%s: failed to restore operational " |
| "channel after scan\n", dev->name); |
| /* Restart STA timer for HW scan case */ |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| ieee80211_restart_sta_timer(sdata); |
| rcu_read_unlock(); |
| |
| goto done; |
| } |
| |
| local->sta_sw_scanning = 0; |
| if (ieee80211_hw_config(local)) |
| printk(KERN_DEBUG "%s: failed to restore operational " |
| "channel after scan\n", dev->name); |
| |
| |
| netif_tx_lock_bh(local->mdev); |
| netif_addr_lock(local->mdev); |
| local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; |
| local->ops->configure_filter(local_to_hw(local), |
| FIF_BCN_PRBRESP_PROMISC, |
| &local->filter_flags, |
| local->mdev->mc_count, |
| local->mdev->mc_list); |
| |
| netif_addr_unlock(local->mdev); |
| netif_tx_unlock_bh(local->mdev); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| /* Tell AP we're back */ |
| if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
| sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) |
| ieee80211_send_nullfunc(local, sdata, 0); |
| |
| ieee80211_restart_sta_timer(sdata); |
| |
| netif_wake_queue(sdata->dev); |
| } |
| rcu_read_unlock(); |
| |
| done: |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
| (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && |
| !ieee80211_sta_active_ibss(sdata))) |
| ieee80211_sta_find_ibss(sdata, ifsta); |
| } |
| } |
| EXPORT_SYMBOL(ieee80211_scan_completed); |
| |
| void ieee80211_sta_scan_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, scan_work.work); |
| struct net_device *dev = local->scan_dev; |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_channel *chan; |
| int skip; |
| unsigned long next_delay = 0; |
| |
| if (!local->sta_sw_scanning) |
| return; |
| |
| switch (local->scan_state) { |
| case SCAN_SET_CHANNEL: |
| /* |
| * Get current scan band. scan_band may be IEEE80211_NUM_BANDS |
| * after we successfully scanned the last channel of the last |
| * band (and the last band is supported by the hw) |
| */ |
| if (local->scan_band < IEEE80211_NUM_BANDS) |
| sband = local->hw.wiphy->bands[local->scan_band]; |
| else |
| sband = NULL; |
| |
| /* |
| * If we are at an unsupported band and have more bands |
| * left to scan, advance to the next supported one. |
| */ |
| while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { |
| local->scan_band++; |
| sband = local->hw.wiphy->bands[local->scan_band]; |
| local->scan_channel_idx = 0; |
| } |
| |
| /* if no more bands/channels left, complete scan */ |
| if (!sband || local->scan_channel_idx >= sband->n_channels) { |
| ieee80211_scan_completed(local_to_hw(local)); |
| return; |
| } |
| skip = 0; |
| chan = &sband->channels[local->scan_channel_idx]; |
| |
| if (chan->flags & IEEE80211_CHAN_DISABLED || |
| (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
| chan->flags & IEEE80211_CHAN_NO_IBSS)) |
| skip = 1; |
| |
| if (!skip) { |
| local->scan_channel = chan; |
| if (ieee80211_hw_config(local)) { |
| printk(KERN_DEBUG "%s: failed to set freq to " |
| "%d MHz for scan\n", dev->name, |
| chan->center_freq); |
| skip = 1; |
| } |
| } |
| |
| /* advance state machine to next channel/band */ |
| local->scan_channel_idx++; |
| if (local->scan_channel_idx >= sband->n_channels) { |
| /* |
| * scan_band may end up == IEEE80211_NUM_BANDS, but |
| * we'll catch that case above and complete the scan |
| * if that is the case. |
| */ |
| local->scan_band++; |
| 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: |
| next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
| local->scan_state = SCAN_SET_CHANNEL; |
| |
| if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) |
| break; |
| ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, |
| local->scan_ssid_len); |
| next_delay = IEEE80211_CHANNEL_TIME; |
| break; |
| } |
| |
| if (local->sta_sw_scanning) |
| queue_delayed_work(local->hw.workqueue, &local->scan_work, |
| next_delay); |
| } |
| |
| |
| static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata, |
| u8 *ssid, size_t ssid_len) |
| { |
| struct ieee80211_local *local = scan_sdata->local; |
| struct ieee80211_sub_if_data *sdata; |
| |
| 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 |
| */ |
| |
| if (local->sta_sw_scanning || local->sta_hw_scanning) { |
| if (local->scan_dev == scan_sdata->dev) |
| return 0; |
| return -EBUSY; |
| } |
| |
| if (local->ops->hw_scan) { |
| int rc = local->ops->hw_scan(local_to_hw(local), |
| ssid, ssid_len); |
| if (!rc) { |
| local->sta_hw_scanning = 1; |
| local->scan_dev = scan_sdata->dev; |
| } |
| return rc; |
| } |
| |
| local->sta_sw_scanning = 1; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| netif_stop_queue(sdata->dev); |
| if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
| (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
| ieee80211_send_nullfunc(local, sdata, 1); |
| } |
| rcu_read_unlock(); |
| |
| 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_channel_idx = 0; |
| local->scan_band = IEEE80211_BAND_2GHZ; |
| local->scan_dev = scan_sdata->dev; |
| |
| netif_addr_lock_bh(local->mdev); |
| local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; |
| local->ops->configure_filter(local_to_hw(local), |
| FIF_BCN_PRBRESP_PROMISC, |
| &local->filter_flags, |
| local->mdev->mc_count, |
| local->mdev->mc_list); |
| netif_addr_unlock_bh(local->mdev); |
| |
| /* TODO: start scan as soon as all nullfunc frames are ACKed */ |
| queue_delayed_work(local->hw.workqueue, &local->scan_work, |
| IEEE80211_CHANNEL_TIME); |
| |
| return 0; |
| } |
| |
| |
| int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len) |
| { |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| struct ieee80211_local *local = sdata->local; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| return ieee80211_sta_start_scan(sdata, ssid, ssid_len); |
| |
| if (local->sta_sw_scanning || local->sta_hw_scanning) { |
| if (local->scan_dev == sdata->dev) |
| return 0; |
| return -EBUSY; |
| } |
| |
| ifsta->scan_ssid_len = ssid_len; |
| if (ssid_len) |
| memcpy(ifsta->scan_ssid, ssid, ssid_len); |
| set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
| queue_work(local->hw.workqueue, &ifsta->work); |
| return 0; |
| } |
| |
| |
| static void ieee80211_sta_add_scan_ies(struct iw_request_info *info, |
| struct ieee80211_sta_bss *bss, |
| char **current_ev, char *end_buf) |
| { |
| u8 *pos, *end, *next; |
| struct iw_event iwe; |
| |
| if (bss == NULL || bss->ies == NULL) |
| return; |
| |
| /* |
| * If needed, fragment the IEs buffer (at IE boundaries) into short |
| * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. |
| */ |
| pos = bss->ies; |
| end = pos + bss->ies_len; |
| |
| while (end - pos > IW_GENERIC_IE_MAX) { |
| next = pos + 2 + pos[1]; |
| while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) |
| next = next + 2 + next[1]; |
| |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVGENIE; |
| iwe.u.data.length = next - pos; |
| *current_ev = iwe_stream_add_point(info, *current_ev, |
| end_buf, &iwe, pos); |
| |
| pos = next; |
| } |
| |
| if (end > pos) { |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVGENIE; |
| iwe.u.data.length = end - pos; |
| *current_ev = iwe_stream_add_point(info, *current_ev, |
| end_buf, &iwe, pos); |
| } |
| } |
| |
| |
| static char * |
| ieee80211_sta_scan_result(struct ieee80211_local *local, |
| struct iw_request_info *info, |
| struct ieee80211_sta_bss *bss, |
| char *current_ev, char *end_buf) |
| { |
| struct iw_event iwe; |
| |
| if (time_after(jiffies, |
| bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) |
| 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(info, current_ev, end_buf, &iwe, |
| IW_EV_ADDR_LEN); |
| |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = SIOCGIWESSID; |
| if (bss_mesh_cfg(bss)) { |
| iwe.u.data.length = bss_mesh_id_len(bss); |
| iwe.u.data.flags = 1; |
| current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| &iwe, bss_mesh_id(bss)); |
| } else { |
| iwe.u.data.length = bss->ssid_len; |
| iwe.u.data.flags = 1; |
| current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| &iwe, bss->ssid); |
| } |
| |
| if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
| || bss_mesh_cfg(bss)) { |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = SIOCGIWMODE; |
| if (bss_mesh_cfg(bss)) |
| iwe.u.mode = IW_MODE_MESH; |
| else 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(info, current_ev, end_buf, |
| &iwe, IW_EV_UINT_LEN); |
| } |
| |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = SIOCGIWFREQ; |
| iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); |
| iwe.u.freq.e = 0; |
| current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| IW_EV_FREQ_LEN); |
| |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = SIOCGIWFREQ; |
| iwe.u.freq.m = bss->freq; |
| iwe.u.freq.e = 6; |
| current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| IW_EV_FREQ_LEN); |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVQUAL; |
| iwe.u.qual.qual = bss->qual; |
| iwe.u.qual.level = bss->signal; |
| iwe.u.qual.noise = bss->noise; |
| iwe.u.qual.updated = local->wstats_flags; |
| current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| IW_EV_QUAL_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(info, current_ev, end_buf, |
| &iwe, ""); |
| |
| ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf); |
| |
| if (bss && bss->supp_rates_len > 0) { |
| /* display all supported rates in readable format */ |
| char *p = current_ev + iwe_stream_lcp_len(info); |
| int i; |
| |
| memset(&iwe, 0, sizeof(iwe)); |
| 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(info, current_ev, p, |
| end_buf, &iwe, IW_EV_PARAM_LEN); |
| } |
| current_ev = p; |
| } |
| |
| if (bss) { |
| char *buf; |
| buf = kmalloc(30, GFP_ATOMIC); |
| if (buf) { |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVCUSTOM; |
| sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVCUSTOM; |
| sprintf(buf, " Last beacon: %dms ago", |
| jiffies_to_msecs(jiffies - bss->last_update)); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, &iwe, buf); |
| kfree(buf); |
| } |
| } |
| |
| if (bss_mesh_cfg(bss)) { |
| char *buf; |
| u8 *cfg = bss_mesh_cfg(bss); |
| buf = kmalloc(50, GFP_ATOMIC); |
| if (buf) { |
| memset(&iwe, 0, sizeof(iwe)); |
| iwe.cmd = IWEVCUSTOM; |
| sprintf(buf, "Mesh network (version %d)", cfg[0]); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| sprintf(buf, "Path Selection Protocol ID: " |
| "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
| cfg[4]); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| sprintf(buf, "Path Selection Metric ID: " |
| "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
| cfg[8]); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| sprintf(buf, "Congestion Control Mode ID: " |
| "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
| cfg[11], cfg[12]); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| sprintf(buf, "Channel Precedence: " |
| "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
| cfg[15], cfg[16]); |
| iwe.u.data.length = strlen(buf); |
| current_ev = iwe_stream_add_point(info, current_ev, |
| end_buf, |
| &iwe, buf); |
| kfree(buf); |
| } |
| } |
| |
| return current_ev; |
| } |
| |
| |
| int ieee80211_sta_scan_results(struct ieee80211_local *local, |
| struct iw_request_info *info, |
| char *buf, size_t len) |
| { |
| 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(local, info, bss, |
| current_ev, end_buf); |
| } |
| spin_unlock_bh(&local->sta_bss_lock); |
| return current_ev - buf; |
| } |
| |
| |
| int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
| { |
| 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; |
| return 0; |
| } |
| |
| |
| struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
| struct sk_buff *skb, u8 *bssid, |
| u8 *addr, u64 supp_rates) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| DECLARE_MAC_BUF(mac); |
| int band = local->hw.conf.channel->band; |
| |
| /* 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 %s\n", sdata->dev->name, print_mac(mac, addr)); |
| } |
| return NULL; |
| } |
| |
| if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
| return NULL; |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
| wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
| #endif |
| |
| sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
| if (!sta) |
| return NULL; |
| |
| set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
| |
| /* make sure mandatory rates are always added */ |
| sta->supp_rates[band] = supp_rates | |
| ieee80211_sta_get_mandatory_rates(local, band); |
| |
| rate_control_rate_init(sta, local); |
| |
| if (sta_info_insert(sta)) |
| return NULL; |
| |
| return sta; |
| } |
| |
| |
| int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
| { |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| |
| printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
| sdata->dev->name, reason); |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
| sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
| return -EINVAL; |
| |
| ieee80211_send_deauth(sdata, ifsta, reason); |
| ieee80211_set_disassoc(sdata, ifsta, 1); |
| return 0; |
| } |
| |
| |
| int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
| { |
| struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
| |
| printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
| sdata->dev->name, reason); |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| return -EINVAL; |
| |
| if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
| return -1; |
| |
| ieee80211_send_disassoc(sdata, ifsta, reason); |
| ieee80211_set_disassoc(sdata, ifsta, 0); |
| return 0; |
| } |
| |
| void ieee80211_notify_mac(struct ieee80211_hw *hw, |
| enum ieee80211_notification_types notif_type) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| |
| switch (notif_type) { |
| case IEEE80211_NOTIFY_RE_ASSOC: |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
| continue; |
| |
| ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
| } |
| rcu_read_unlock(); |
| break; |
| } |
| } |
| EXPORT_SYMBOL(ieee80211_notify_mac); |