+++ /dev/null
-/*
- * Copyright 2002-2005, Instant802 Networks, Inc.
- * Copyright 2005-2006, Devicescape Software, Inc.
- * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
- *
- * 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.
- */
-
-#include <net/mac80211.h>
-#include <net/ieee80211_radiotap.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/etherdevice.h>
-#include <linux/if_arp.h>
-#include <linux/wireless.h>
-#include <linux/rtnetlink.h>
-#include <linux/bitmap.h>
-#include <net/net_namespace.h>
-#include <net/cfg80211.h>
-
-#include "ieee80211_i.h"
-#include "ieee80211_rate.h"
-#include "wep.h"
-#include "wme.h"
-#include "aes_ccm.h"
-#include "ieee80211_led.h"
-#include "cfg.h"
-#include "debugfs.h"
-#include "debugfs_netdev.h"
-
-#define SUPP_MCS_SET_LEN 16
-
-/*
- * For seeing transmitted packets on monitor interfaces
- * we have a radiotap header too.
- */
-struct ieee80211_tx_status_rtap_hdr {
- struct ieee80211_radiotap_header hdr;
- __le16 tx_flags;
- u8 data_retries;
-} __attribute__ ((packed));
-
-/* common interface routines */
-
-static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
-{
- memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
- return ETH_ALEN;
-}
-
-/* must be called under mdev tx lock */
-static void ieee80211_configure_filter(struct ieee80211_local *local)
-{
- unsigned int changed_flags;
- unsigned int new_flags = 0;
-
- if (atomic_read(&local->iff_promiscs))
- new_flags |= FIF_PROMISC_IN_BSS;
-
- if (atomic_read(&local->iff_allmultis))
- new_flags |= FIF_ALLMULTI;
-
- if (local->monitors)
- new_flags |= FIF_BCN_PRBRESP_PROMISC;
-
- if (local->fif_fcsfail)
- new_flags |= FIF_FCSFAIL;
-
- if (local->fif_plcpfail)
- new_flags |= FIF_PLCPFAIL;
-
- if (local->fif_control)
- new_flags |= FIF_CONTROL;
-
- if (local->fif_other_bss)
- new_flags |= FIF_OTHER_BSS;
-
- changed_flags = local->filter_flags ^ new_flags;
-
- /* be a bit nasty */
- new_flags |= (1<<31);
-
- local->ops->configure_filter(local_to_hw(local),
- changed_flags, &new_flags,
- local->mdev->mc_count,
- local->mdev->mc_list);
-
- WARN_ON(new_flags & (1<<31));
-
- local->filter_flags = new_flags & ~(1<<31);
-}
-
-/* master interface */
-
-static int ieee80211_master_open(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata;
- int res = -EOPNOTSUPP;
-
- /* we hold the RTNL here so can safely walk the list */
- list_for_each_entry(sdata, &local->interfaces, list) {
- if (sdata->dev != dev && netif_running(sdata->dev)) {
- res = 0;
- break;
- }
- }
- return res;
-}
-
-static int ieee80211_master_stop(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata;
-
- /* we hold the RTNL here so can safely walk the list */
- list_for_each_entry(sdata, &local->interfaces, list)
- if (sdata->dev != dev && netif_running(sdata->dev))
- dev_close(sdata->dev);
-
- return 0;
-}
-
-static void ieee80211_master_set_multicast_list(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-
- ieee80211_configure_filter(local);
-}
-
-/* regular interfaces */
-
-static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
-{
- /* FIX: what would be proper limits for MTU?
- * This interface uses 802.3 frames. */
- if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
- printk(KERN_WARNING "%s: invalid MTU %d\n",
- dev->name, new_mtu);
- return -EINVAL;
- }
-
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
- dev->mtu = new_mtu;
- return 0;
-}
-
-static inline int identical_mac_addr_allowed(int type1, int type2)
-{
- return (type1 == IEEE80211_IF_TYPE_MNTR ||
- type2 == IEEE80211_IF_TYPE_MNTR ||
- (type1 == IEEE80211_IF_TYPE_AP &&
- type2 == IEEE80211_IF_TYPE_WDS) ||
- (type1 == IEEE80211_IF_TYPE_WDS &&
- (type2 == IEEE80211_IF_TYPE_WDS ||
- type2 == IEEE80211_IF_TYPE_AP)) ||
- (type1 == IEEE80211_IF_TYPE_AP &&
- type2 == IEEE80211_IF_TYPE_VLAN) ||
- (type1 == IEEE80211_IF_TYPE_VLAN &&
- (type2 == IEEE80211_IF_TYPE_AP ||
- type2 == IEEE80211_IF_TYPE_VLAN)));
-}
-
-static int ieee80211_open(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata, *nsdata;
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_if_init_conf conf;
- int res;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- /* we hold the RTNL here so can safely walk the list */
- list_for_each_entry(nsdata, &local->interfaces, list) {
- struct net_device *ndev = nsdata->dev;
-
- if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
- compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
- /*
- * check whether it may have the same address
- */
- if (!identical_mac_addr_allowed(sdata->vif.type,
- nsdata->vif.type))
- return -ENOTUNIQ;
-
- /*
- * can only add VLANs to enabled APs
- */
- if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
- nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
- netif_running(nsdata->dev))
- sdata->u.vlan.ap = nsdata;
- }
- }
-
- switch (sdata->vif.type) {
- case IEEE80211_IF_TYPE_WDS:
- if (is_zero_ether_addr(sdata->u.wds.remote_addr))
- return -ENOLINK;
- break;
- case IEEE80211_IF_TYPE_VLAN:
- if (!sdata->u.vlan.ap)
- return -ENOLINK;
- break;
- case IEEE80211_IF_TYPE_AP:
- case IEEE80211_IF_TYPE_STA:
- case IEEE80211_IF_TYPE_MNTR:
- case IEEE80211_IF_TYPE_IBSS:
- /* no special treatment */
- break;
- case IEEE80211_IF_TYPE_INVALID:
- /* cannot happen */
- WARN_ON(1);
- break;
- }
-
- if (local->open_count == 0) {
- res = 0;
- if (local->ops->start)
- res = local->ops->start(local_to_hw(local));
- if (res)
- return res;
- ieee80211_hw_config(local);
- ieee80211_led_radio(local, local->hw.conf.radio_enabled);
- }
-
- switch (sdata->vif.type) {
- case IEEE80211_IF_TYPE_VLAN:
- list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
- /* no need to tell driver */
- break;
- case IEEE80211_IF_TYPE_MNTR:
- if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
- local->cooked_mntrs++;
- break;
- }
-
- /* must be before the call to ieee80211_configure_filter */
- local->monitors++;
- if (local->monitors == 1)
- local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
-
- if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
- local->fif_fcsfail++;
- if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
- local->fif_plcpfail++;
- if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
- local->fif_control++;
- if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
- local->fif_other_bss++;
-
- netif_tx_lock_bh(local->mdev);
- ieee80211_configure_filter(local);
- netif_tx_unlock_bh(local->mdev);
- break;
- case IEEE80211_IF_TYPE_STA:
- case IEEE80211_IF_TYPE_IBSS:
- sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
- /* fall through */
- default:
- conf.vif = &sdata->vif;
- conf.type = sdata->vif.type;
- conf.mac_addr = dev->dev_addr;
- res = local->ops->add_interface(local_to_hw(local), &conf);
- if (res && !local->open_count && local->ops->stop)
- local->ops->stop(local_to_hw(local));
- if (res)
- return res;
-
- ieee80211_if_config(dev);
- ieee80211_reset_erp_info(dev);
- ieee80211_enable_keys(sdata);
-
- if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
- !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
- netif_carrier_off(dev);
- else
- netif_carrier_on(dev);
- }
-
- if (local->open_count == 0) {
- res = dev_open(local->mdev);
- WARN_ON(res);
- tasklet_enable(&local->tx_pending_tasklet);
- tasklet_enable(&local->tasklet);
- }
-
- /*
- * set_multicast_list will be invoked by the networking core
- * which will check whether any increments here were done in
- * error and sync them down to the hardware as filter flags.
- */
- if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
- atomic_inc(&local->iff_allmultis);
-
- if (sdata->flags & IEEE80211_SDATA_PROMISC)
- atomic_inc(&local->iff_promiscs);
-
- local->open_count++;
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int ieee80211_stop(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_if_init_conf conf;
- struct sta_info *sta;
- int i;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- list_for_each_entry(sta, &local->sta_list, list) {
- if (sta->dev == dev)
- for (i = 0; i < STA_TID_NUM; i++)
- ieee80211_sta_stop_rx_ba_session(sta->dev,
- sta->addr, i,
- WLAN_BACK_RECIPIENT,
- WLAN_REASON_QSTA_LEAVE_QBSS);
- }
-
- netif_stop_queue(dev);
-
- /*
- * Don't count this interface for promisc/allmulti while it
- * is down. dev_mc_unsync() will invoke set_multicast_list
- * on the master interface which will sync these down to the
- * hardware as filter flags.
- */
- if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
- atomic_dec(&local->iff_allmultis);
-
- if (sdata->flags & IEEE80211_SDATA_PROMISC)
- atomic_dec(&local->iff_promiscs);
-
- dev_mc_unsync(local->mdev, dev);
-
- /* APs need special treatment */
- if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
- struct ieee80211_sub_if_data *vlan, *tmp;
- struct beacon_data *old_beacon = sdata->u.ap.beacon;
-
- /* remove beacon */
- rcu_assign_pointer(sdata->u.ap.beacon, NULL);
- synchronize_rcu();
- kfree(old_beacon);
-
- /* down all dependent devices, that is VLANs */
- list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
- u.vlan.list)
- dev_close(vlan->dev);
- WARN_ON(!list_empty(&sdata->u.ap.vlans));
- }
-
- local->open_count--;
-
- switch (sdata->vif.type) {
- case IEEE80211_IF_TYPE_VLAN:
- list_del(&sdata->u.vlan.list);
- sdata->u.vlan.ap = NULL;
- /* no need to tell driver */
- break;
- case IEEE80211_IF_TYPE_MNTR:
- if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
- local->cooked_mntrs--;
- break;
- }
-
- local->monitors--;
- if (local->monitors == 0)
- local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
-
- if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
- local->fif_fcsfail--;
- if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
- local->fif_plcpfail--;
- if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
- local->fif_control--;
- if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
- local->fif_other_bss--;
-
- netif_tx_lock_bh(local->mdev);
- ieee80211_configure_filter(local);
- netif_tx_unlock_bh(local->mdev);
- break;
- case IEEE80211_IF_TYPE_STA:
- case IEEE80211_IF_TYPE_IBSS:
- sdata->u.sta.state = IEEE80211_DISABLED;
- del_timer_sync(&sdata->u.sta.timer);
- /*
- * When we get here, the interface is marked down.
- * Call synchronize_rcu() to wait for the RX path
- * should it be using the interface and enqueuing
- * frames at this very time on another CPU.
- */
- synchronize_rcu();
- skb_queue_purge(&sdata->u.sta.skb_queue);
-
- if (local->scan_dev == sdata->dev) {
- if (!local->ops->hw_scan) {
- local->sta_sw_scanning = 0;
- cancel_delayed_work(&local->scan_work);
- } else
- local->sta_hw_scanning = 0;
- }
-
- flush_workqueue(local->hw.workqueue);
-
- sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
- kfree(sdata->u.sta.extra_ie);
- sdata->u.sta.extra_ie = NULL;
- sdata->u.sta.extra_ie_len = 0;
- /* fall through */
- default:
- conf.vif = &sdata->vif;
- conf.type = sdata->vif.type;
- conf.mac_addr = dev->dev_addr;
- /* disable all keys for as long as this netdev is down */
- ieee80211_disable_keys(sdata);
- local->ops->remove_interface(local_to_hw(local), &conf);
- }
-
- if (local->open_count == 0) {
- if (netif_running(local->mdev))
- dev_close(local->mdev);
-
- if (local->ops->stop)
- local->ops->stop(local_to_hw(local));
-
- ieee80211_led_radio(local, 0);
-
- tasklet_disable(&local->tx_pending_tasklet);
- tasklet_disable(&local->tasklet);
- }
-
- return 0;
-}
-
-int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct sta_info *sta;
- struct ieee80211_sub_if_data *sdata;
- u16 start_seq_num = 0;
- u8 *state;
- int ret;
- DECLARE_MAC_BUF(mac);
-
- if (tid >= STA_TID_NUM)
- return -EINVAL;
-
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
- print_mac(mac, ra), tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-
- sta = sta_info_get(local, ra);
- if (!sta) {
- printk(KERN_DEBUG "Could not find the station\n");
- return -ENOENT;
- }
-
- spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
-
- /* we have tried too many times, receiver does not want A-MPDU */
- if (sta->ampdu_mlme.tid_tx[tid].addba_req_num > HT_AGG_MAX_RETRIES) {
- ret = -EBUSY;
- goto start_ba_exit;
- }
-
- state = &sta->ampdu_mlme.tid_tx[tid].state;
- /* check if the TID is not in aggregation flow already */
- if (*state != HT_AGG_STATE_IDLE) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "BA request denied - session is not "
- "idle on tid %u\n", tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
- ret = -EAGAIN;
- goto start_ba_exit;
- }
-
- /* ensure that TX flow won't interrupt us
- * until the end of the call to requeue function */
- spin_lock_bh(&local->mdev->queue_lock);
-
- /* create a new queue for this aggregation */
- ret = ieee80211_ht_agg_queue_add(local, sta, tid);
-
- /* case no queue is available to aggregation
- * don't switch to aggregation */
- if (ret) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "BA request denied - no queue available for"
- " tid %d\n", tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
- spin_unlock_bh(&local->mdev->queue_lock);
- goto start_ba_exit;
- }
- sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
-
- /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
- * call back right away, it must see that the flow has begun */
- *state |= HT_ADDBA_REQUESTED_MSK;
-
- if (local->ops->ampdu_action)
- ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
- ra, tid, &start_seq_num);
-
- if (ret) {
- /* No need to requeue the packets in the agg queue, since we
- * held the tx lock: no packet could be enqueued to the newly
- * allocated queue */
- ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "BA request denied - HW or queue unavailable"
- " for tid %d\n", tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
- spin_unlock_bh(&local->mdev->queue_lock);
- *state = HT_AGG_STATE_IDLE;
- goto start_ba_exit;
- }
-
- /* Will put all the packets in the new SW queue */
- ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
- spin_unlock_bh(&local->mdev->queue_lock);
-
- /* We have most probably almost emptied the legacy queue */
- /* ieee80211_wake_queue(local_to_hw(local), ieee802_1d_to_ac[tid]); */
-
- /* send an addBA request */
- sta->ampdu_mlme.dialog_token_allocator++;
- sta->ampdu_mlme.tid_tx[tid].dialog_token =
- sta->ampdu_mlme.dialog_token_allocator;
- sta->ampdu_mlme.tid_tx[tid].ssn = start_seq_num;
-
- ieee80211_send_addba_request(sta->dev, ra, tid,
- sta->ampdu_mlme.tid_tx[tid].dialog_token,
- sta->ampdu_mlme.tid_tx[tid].ssn,
- 0x40, 5000);
-
- /* activate the timer for the recipient's addBA response */
- sta->ampdu_mlme.tid_tx[tid].addba_resp_timer.expires =
- jiffies + ADDBA_RESP_INTERVAL;
- add_timer(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
- printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
-
-start_ba_exit:
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
- sta_info_put(sta);
- return ret;
-}
-EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
-
-int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
- u8 *ra, u16 tid,
- enum ieee80211_back_parties initiator)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct sta_info *sta;
- u8 *state;
- int ret = 0;
- DECLARE_MAC_BUF(mac);
-
- if (tid >= STA_TID_NUM)
- return -EINVAL;
-
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "Stop a BA session requested for %s tid %u\n",
- print_mac(mac, ra), tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-
- sta = sta_info_get(local, ra);
- if (!sta)
- return -ENOENT;
-
- /* check if the TID is in aggregation */
- state = &sta->ampdu_mlme.tid_tx[tid].state;
- spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
-
- if (*state != HT_AGG_STATE_OPERATIONAL) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
- printk(KERN_DEBUG "Try to stop Tx aggregation on"
- " non active TID\n");
-#endif /* CONFIG_MAC80211_HT_DEBUG */
- ret = -ENOENT;
- goto stop_BA_exit;
- }
-
- ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
-
- *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
- (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
-
- if (local->ops->ampdu_action)
- ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
- ra, tid, NULL);
-
- /* case HW denied going back to legacy */
- if (ret) {
- WARN_ON(ret != -EBUSY);
- *state = HT_AGG_STATE_OPERATIONAL;
- ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
- goto stop_BA_exit;
- }
-
-stop_BA_exit:
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
- sta_info_put(sta);
- return ret;
-}
-EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
-
-void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct sta_info *sta;
- u8 *state;
- DECLARE_MAC_BUF(mac);
-
- if (tid >= STA_TID_NUM) {
- printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
- tid, STA_TID_NUM);
- return;
- }
-
- sta = sta_info_get(local, ra);
- if (!sta) {
- printk(KERN_DEBUG "Could not find station: %s\n",
- print_mac(mac, ra));
- return;
- }
-
- state = &sta->ampdu_mlme.tid_tx[tid].state;
- spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
-
- if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
- printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
- *state);
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
- sta_info_put(sta);
- return;
- }
-
- WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
-
- *state |= HT_ADDBA_DRV_READY_MSK;
-
- if (*state == HT_AGG_STATE_OPERATIONAL) {
- printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
- ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
- }
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
- sta_info_put(sta);
-}
-EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
-
-void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct sta_info *sta;
- u8 *state;
- int agg_queue;
- DECLARE_MAC_BUF(mac);
-
- if (tid >= STA_TID_NUM) {
- printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
- tid, STA_TID_NUM);
- return;
- }
-
- printk(KERN_DEBUG "Stop a BA session requested on DA %s tid %d\n",
- print_mac(mac, ra), tid);
-
- sta = sta_info_get(local, ra);
- if (!sta) {
- printk(KERN_DEBUG "Could not find station: %s\n",
- print_mac(mac, ra));
- return;
- }
- state = &sta->ampdu_mlme.tid_tx[tid].state;
-
- spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
- if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
- printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
- sta_info_put(sta);
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
- return;
- }
-
- if (*state & HT_AGG_STATE_INITIATOR_MSK)
- ieee80211_send_delba(sta->dev, ra, tid,
- WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
-
- agg_queue = sta->tid_to_tx_q[tid];
-
- /* avoid ordering issues: we are the only one that can modify
- * the content of the qdiscs */
- spin_lock_bh(&local->mdev->queue_lock);
- /* remove the queue for this aggregation */
- ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
- spin_unlock_bh(&local->mdev->queue_lock);
-
- /* we just requeued the all the frames that were in the removed
- * queue, and since we might miss a softirq we do netif_schedule.
- * ieee80211_wake_queue is not used here as this queue is not
- * necessarily stopped */
- netif_schedule(local->mdev);
- *state = HT_AGG_STATE_IDLE;
- sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
-
- sta_info_put(sta);
-}
-EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
-
-void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
- const u8 *ra, u16 tid)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_ra_tid *ra_tid;
- struct sk_buff *skb = dev_alloc_skb(0);
-
- if (unlikely(!skb)) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s: Not enough memory, "
- "dropping start BA session", skb->dev->name);
- return;
- }
- ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
- memcpy(&ra_tid->ra, ra, ETH_ALEN);
- ra_tid->tid = tid;
-
- skb->pkt_type = IEEE80211_ADDBA_MSG;
- skb_queue_tail(&local->skb_queue, skb);
- tasklet_schedule(&local->tasklet);
-}
-EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
-
-void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
- const u8 *ra, u16 tid)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_ra_tid *ra_tid;
- struct sk_buff *skb = dev_alloc_skb(0);
-
- if (unlikely(!skb)) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s: Not enough memory, "
- "dropping stop BA session", skb->dev->name);
- return;
- }
- ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
- memcpy(&ra_tid->ra, ra, ETH_ALEN);
- ra_tid->tid = tid;
-
- skb->pkt_type = IEEE80211_DELBA_MSG;
- skb_queue_tail(&local->skb_queue, skb);
- tasklet_schedule(&local->tasklet);
-}
-EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
-
-static void ieee80211_set_multicast_list(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- int allmulti, promisc, sdata_allmulti, sdata_promisc;
-
- allmulti = !!(dev->flags & IFF_ALLMULTI);
- promisc = !!(dev->flags & IFF_PROMISC);
- sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
- sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
-
- if (allmulti != sdata_allmulti) {
- if (dev->flags & IFF_ALLMULTI)
- atomic_inc(&local->iff_allmultis);
- else
- atomic_dec(&local->iff_allmultis);
- sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
- }
-
- if (promisc != sdata_promisc) {
- if (dev->flags & IFF_PROMISC)
- atomic_inc(&local->iff_promiscs);
- else
- atomic_dec(&local->iff_promiscs);
- sdata->flags ^= IEEE80211_SDATA_PROMISC;
- }
-
- dev_mc_sync(local->mdev, dev);
-}
-
-static const struct header_ops ieee80211_header_ops = {
- .create = eth_header,
- .parse = header_parse_80211,
- .rebuild = eth_rebuild_header,
- .cache = eth_header_cache,
- .cache_update = eth_header_cache_update,
-};
-
-/* Must not be called for mdev */
-void ieee80211_if_setup(struct net_device *dev)
-{
- ether_setup(dev);
- dev->hard_start_xmit = ieee80211_subif_start_xmit;
- dev->wireless_handlers = &ieee80211_iw_handler_def;
- dev->set_multicast_list = ieee80211_set_multicast_list;
- dev->change_mtu = ieee80211_change_mtu;
- dev->open = ieee80211_open;
- dev->stop = ieee80211_stop;
- dev->destructor = ieee80211_if_free;
-}
-
-/* WDS specialties */
-
-int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct sta_info *sta;
- DECLARE_MAC_BUF(mac);
-
- if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
- return 0;
-
- /* Create STA entry for the new peer */
- sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
- if (!sta)
- return -ENOMEM;
-
- sta->flags |= WLAN_STA_AUTHORIZED;
-
- sta_info_put(sta);
-
- /* Remove STA entry for the old peer */
- sta = sta_info_get(local, sdata->u.wds.remote_addr);
- if (sta) {
- sta_info_free(sta);
- sta_info_put(sta);
- } else {
- printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
- "peer %s\n",
- dev->name, print_mac(mac, sdata->u.wds.remote_addr));
- }
-
- /* Update WDS link data */
- memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
-
- return 0;
-}
-
-/* everything else */
-
-static int __ieee80211_if_config(struct net_device *dev,
- struct sk_buff *beacon,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_if_conf conf;
-
- if (!local->ops->config_interface || !netif_running(dev))
- return 0;
-
- memset(&conf, 0, sizeof(conf));
- conf.type = sdata->vif.type;
- if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
- sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
- conf.bssid = sdata->u.sta.bssid;
- conf.ssid = sdata->u.sta.ssid;
- conf.ssid_len = sdata->u.sta.ssid_len;
- } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
- conf.ssid = sdata->u.ap.ssid;
- conf.ssid_len = sdata->u.ap.ssid_len;
- conf.beacon = beacon;
- conf.beacon_control = control;
- }
- return local->ops->config_interface(local_to_hw(local),
- &sdata->vif, &conf);
-}
-
-int ieee80211_if_config(struct net_device *dev)
-{
- return __ieee80211_if_config(dev, NULL, NULL);
-}
-
-int ieee80211_if_config_beacon(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_tx_control control;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct sk_buff *skb;
-
- if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
- return 0;
- skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
- &control);
- if (!skb)
- return -ENOMEM;
- return __ieee80211_if_config(dev, skb, &control);
-}
-
-int ieee80211_hw_config(struct ieee80211_local *local)
-{
- struct ieee80211_channel *chan;
- int ret = 0;
-
- if (local->sta_sw_scanning)
- chan = local->scan_channel;
- else
- chan = local->oper_channel;
-
- local->hw.conf.channel = chan;
-
- if (!local->hw.conf.power_level)
- local->hw.conf.power_level = chan->max_power;
- else
- local->hw.conf.power_level = min(chan->max_power,
- local->hw.conf.power_level);
-
- local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
-
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
- wiphy_name(local->hw.wiphy), chan->center_freq);
-#endif
-
- if (local->open_count)
- ret = local->ops->config(local_to_hw(local), &local->hw.conf);
-
- return ret;
-}
-
-/**
- * ieee80211_hw_config_ht should be used only after legacy configuration
- * has been determined, as ht configuration depends upon the hardware's
- * HT abilities for a _specific_ band.
- */
-int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
- struct ieee80211_ht_info *req_ht_cap,
- struct ieee80211_ht_bss_info *req_bss_cap)
-{
- struct ieee80211_conf *conf = &local->hw.conf;
- struct ieee80211_supported_band *sband;
- int i;
-
- sband = local->hw.wiphy->bands[conf->channel->band];
-
- /* HT is not supported */
- if (!sband->ht_info.ht_supported) {
- conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
- return -EOPNOTSUPP;
- }
-
- /* disable HT */
- if (!enable_ht) {
- conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
- } else {
- conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
- conf->ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
- conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
- conf->ht_conf.cap |=
- sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
- conf->ht_bss_conf.primary_channel =
- req_bss_cap->primary_channel;
- conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
- conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
- for (i = 0; i < SUPP_MCS_SET_LEN; i++)
- conf->ht_conf.supp_mcs_set[i] =
- sband->ht_info.supp_mcs_set[i] &
- req_ht_cap->supp_mcs_set[i];
-
- /* In STA mode, this gives us indication
- * to the AP's mode of operation */
- conf->ht_conf.ht_supported = 1;
- conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
- conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
- }
-
- local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
-
- return 0;
-}
-
-void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
- u32 changed)
-{
- struct ieee80211_local *local = sdata->local;
-
- if (!changed)
- return;
-
- if (local->ops->bss_info_changed)
- local->ops->bss_info_changed(local_to_hw(local),
- &sdata->vif,
- &sdata->bss_conf,
- changed);
-}
-
-void ieee80211_reset_erp_info(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- sdata->bss_conf.use_cts_prot = 0;
- sdata->bss_conf.use_short_preamble = 0;
- ieee80211_bss_info_change_notify(sdata,
- BSS_CHANGED_ERP_CTS_PROT |
- BSS_CHANGED_ERP_PREAMBLE);
-}
-
-void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
- struct sk_buff *skb,
- struct ieee80211_tx_status *status)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_tx_status *saved;
- int tmp;
-
- skb->dev = local->mdev;
- saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
- if (unlikely(!saved)) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s: Not enough memory, "
- "dropping tx status", skb->dev->name);
- /* should be dev_kfree_skb_irq, but due to this function being
- * named _irqsafe instead of just _irq we can't be sure that
- * people won't call it from non-irq contexts */
- dev_kfree_skb_any(skb);
- return;
- }
- memcpy(saved, status, sizeof(struct ieee80211_tx_status));
- /* copy pointer to saved status into skb->cb for use by tasklet */
- memcpy(skb->cb, &saved, sizeof(saved));
-
- skb->pkt_type = IEEE80211_TX_STATUS_MSG;
- skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
- &local->skb_queue : &local->skb_queue_unreliable, skb);
- tmp = skb_queue_len(&local->skb_queue) +
- skb_queue_len(&local->skb_queue_unreliable);
- while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
- (skb = skb_dequeue(&local->skb_queue_unreliable))) {
- memcpy(&saved, skb->cb, sizeof(saved));
- kfree(saved);
- dev_kfree_skb_irq(skb);
- tmp--;
- I802_DEBUG_INC(local->tx_status_drop);
- }
- tasklet_schedule(&local->tasklet);
-}
-EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
-
-static void ieee80211_tasklet_handler(unsigned long data)
-{
- struct ieee80211_local *local = (struct ieee80211_local *) data;
- struct sk_buff *skb;
- struct ieee80211_rx_status rx_status;
- struct ieee80211_tx_status *tx_status;
- struct ieee80211_ra_tid *ra_tid;
-
- while ((skb = skb_dequeue(&local->skb_queue)) ||
- (skb = skb_dequeue(&local->skb_queue_unreliable))) {
- switch (skb->pkt_type) {
- case IEEE80211_RX_MSG:
- /* status is in skb->cb */
- memcpy(&rx_status, skb->cb, sizeof(rx_status));
- /* Clear skb->pkt_type in order to not confuse kernel
- * netstack. */
- skb->pkt_type = 0;
- __ieee80211_rx(local_to_hw(local), skb, &rx_status);
- break;
- case IEEE80211_TX_STATUS_MSG:
- /* get pointer to saved status out of skb->cb */
- memcpy(&tx_status, skb->cb, sizeof(tx_status));
- skb->pkt_type = 0;
- ieee80211_tx_status(local_to_hw(local),
- skb, tx_status);
- kfree(tx_status);
- break;
- case IEEE80211_DELBA_MSG:
- ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
- ieee80211_stop_tx_ba_cb(local_to_hw(local),
- ra_tid->ra, ra_tid->tid);
- dev_kfree_skb(skb);
- break;
- case IEEE80211_ADDBA_MSG:
- ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
- ieee80211_start_tx_ba_cb(local_to_hw(local),
- ra_tid->ra, ra_tid->tid);
- dev_kfree_skb(skb);
- break ;
- default: /* should never get here! */
- printk(KERN_ERR "%s: Unknown message type (%d)\n",
- wiphy_name(local->hw.wiphy), skb->pkt_type);
- dev_kfree_skb(skb);
- break;
- }
- }
-}
-
-/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
- * make a prepared TX frame (one that has been given to hw) to look like brand
- * new IEEE 802.11 frame that is ready to go through TX processing again.
- * Also, tx_packet_data in cb is restored from tx_control. */
-static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
- struct ieee80211_key *key,
- struct sk_buff *skb,
- struct ieee80211_tx_control *control)
-{
- int hdrlen, iv_len, mic_len;
- struct ieee80211_tx_packet_data *pkt_data;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
- pkt_data->flags = 0;
- if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
- pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
- if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
- pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
- if (control->flags & IEEE80211_TXCTL_REQUEUE)
- pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
- if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
- pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
- pkt_data->queue = control->queue;
-
- hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-
- if (!key)
- goto no_key;
-
- switch (key->conf.alg) {
- case ALG_WEP:
- iv_len = WEP_IV_LEN;
- mic_len = WEP_ICV_LEN;
- break;
- case ALG_TKIP:
- iv_len = TKIP_IV_LEN;
- mic_len = TKIP_ICV_LEN;
- break;
- case ALG_CCMP:
- iv_len = CCMP_HDR_LEN;
- mic_len = CCMP_MIC_LEN;
- break;
- default:
- goto no_key;
- }
-
- if (skb->len >= mic_len &&
- !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
- skb_trim(skb, skb->len - mic_len);
- if (skb->len >= iv_len && skb->len > hdrlen) {
- memmove(skb->data + iv_len, skb->data, hdrlen);
- skb_pull(skb, iv_len);
- }
-
-no_key:
- {
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc = le16_to_cpu(hdr->frame_control);
- if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
- fc &= ~IEEE80211_STYPE_QOS_DATA;
- hdr->frame_control = cpu_to_le16(fc);
- memmove(skb->data + 2, skb->data, hdrlen - 2);
- skb_pull(skb, 2);
- }
- }
-}
-
-void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_tx_status *status)
-{
- struct sk_buff *skb2;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_local *local = hw_to_local(hw);
- u16 frag, type;
- struct ieee80211_tx_status_rtap_hdr *rthdr;
- struct ieee80211_sub_if_data *sdata;
- struct net_device *prev_dev = NULL;
-
- if (!status) {
- printk(KERN_ERR
- "%s: ieee80211_tx_status called with NULL status\n",
- wiphy_name(local->hw.wiphy));
- dev_kfree_skb(skb);
- return;
- }
-
- if (status->excessive_retries) {
- struct sta_info *sta;
- sta = sta_info_get(local, hdr->addr1);
- if (sta) {
- if (sta->flags & WLAN_STA_PS) {
- /* The STA is in power save mode, so assume
- * that this TX packet failed because of that.
- */
- status->excessive_retries = 0;
- status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
- }
- sta_info_put(sta);
- }
- }
-
- if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
- struct sta_info *sta;
- sta = sta_info_get(local, hdr->addr1);
- if (sta) {
- sta->tx_filtered_count++;
-
- /* Clear the TX filter mask for this STA when sending
- * the next packet. If the STA went to power save mode,
- * this will happen when it is waking up for the next
- * time. */
- sta->clear_dst_mask = 1;
-
- /* TODO: Is the WLAN_STA_PS flag always set here or is
- * the race between RX and TX status causing some
- * packets to be filtered out before 80211.o gets an
- * update for PS status? This seems to be the case, so
- * no changes are likely to be needed. */
- if (sta->flags & WLAN_STA_PS &&
- skb_queue_len(&sta->tx_filtered) <
- STA_MAX_TX_BUFFER) {
- ieee80211_remove_tx_extra(local, sta->key,
- skb,
- &status->control);
- skb_queue_tail(&sta->tx_filtered, skb);
- } else if (!(sta->flags & WLAN_STA_PS) &&
- !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
- /* Software retry the packet once */
- status->control.flags |= IEEE80211_TXCTL_REQUEUE;
- ieee80211_remove_tx_extra(local, sta->key,
- skb,
- &status->control);
- dev_queue_xmit(skb);
- } else {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: dropped TX "
- "filtered frame queue_len=%d "
- "PS=%d @%lu\n",
- wiphy_name(local->hw.wiphy),
- skb_queue_len(
- &sta->tx_filtered),
- !!(sta->flags & WLAN_STA_PS),
- jiffies);
- }
- dev_kfree_skb(skb);
- }
- sta_info_put(sta);
- return;
- }
- } else
- rate_control_tx_status(local->mdev, skb, status);
-
- ieee80211_led_tx(local, 0);
-
- /* SNMP counters
- * Fragments are passed to low-level drivers as separate skbs, so these
- * are actually fragments, not frames. Update frame counters only for
- * the first fragment of the frame. */
-
- frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
- type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
-
- if (status->flags & IEEE80211_TX_STATUS_ACK) {
- if (frag == 0) {
- local->dot11TransmittedFrameCount++;
- if (is_multicast_ether_addr(hdr->addr1))
- local->dot11MulticastTransmittedFrameCount++;
- if (status->retry_count > 0)
- local->dot11RetryCount++;
- if (status->retry_count > 1)
- local->dot11MultipleRetryCount++;
- }
-
- /* This counter shall be incremented for an acknowledged MPDU
- * with an individual address in the address 1 field or an MPDU
- * with a multicast address in the address 1 field of type Data
- * or Management. */
- if (!is_multicast_ether_addr(hdr->addr1) ||
- type == IEEE80211_FTYPE_DATA ||
- type == IEEE80211_FTYPE_MGMT)
- local->dot11TransmittedFragmentCount++;
- } else {
- if (frag == 0)
- local->dot11FailedCount++;
- }
-
- /* this was a transmitted frame, but now we want to reuse it */
- skb_orphan(skb);
-
- /*
- * This is a bit racy but we can avoid a lot of work
- * with this test...
- */
- if (!local->monitors && !local->cooked_mntrs) {
- dev_kfree_skb(skb);
- return;
- }
-
- /* send frame to monitor interfaces now */
-
- if (skb_headroom(skb) < sizeof(*rthdr)) {
- printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
- dev_kfree_skb(skb);
- return;
- }
-
- rthdr = (struct ieee80211_tx_status_rtap_hdr*)
- skb_push(skb, sizeof(*rthdr));
-
- memset(rthdr, 0, sizeof(*rthdr));
- rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
- rthdr->hdr.it_present =
- cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
- (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
-
- if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
- !is_multicast_ether_addr(hdr->addr1))
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
-
- if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
- (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
- else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
- rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
-
- rthdr->data_retries = status->retry_count;
-
- /* XXX: is this sufficient for BPF? */
- skb_set_mac_header(skb, 0);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
-
- rcu_read_lock();
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
- if (!netif_running(sdata->dev))
- continue;
-
- if (prev_dev) {
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (skb2) {
- skb2->dev = prev_dev;
- netif_rx(skb2);
- }
- }
-
- prev_dev = sdata->dev;
- }
- }
- if (prev_dev) {
- skb->dev = prev_dev;
- netif_rx(skb);
- skb = NULL;
- }
- rcu_read_unlock();
- dev_kfree_skb(skb);
-}
-EXPORT_SYMBOL(ieee80211_tx_status);
-
-struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
- const struct ieee80211_ops *ops)
-{
- struct net_device *mdev;
- struct ieee80211_local *local;
- struct ieee80211_sub_if_data *sdata;
- int priv_size;
- struct wiphy *wiphy;
-
- /* Ensure 32-byte alignment of our private data and hw private data.
- * We use the wiphy priv data for both our ieee80211_local and for
- * the driver's private data
- *
- * In memory it'll be like this:
- *
- * +-------------------------+
- * | struct wiphy |
- * +-------------------------+
- * | struct ieee80211_local |
- * +-------------------------+
- * | driver's private data |
- * +-------------------------+
- *
- */
- priv_size = ((sizeof(struct ieee80211_local) +
- NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
- priv_data_len;
-
- wiphy = wiphy_new(&mac80211_config_ops, priv_size);
-
- if (!wiphy)
- return NULL;
-
- wiphy->privid = mac80211_wiphy_privid;
-
- local = wiphy_priv(wiphy);
- local->hw.wiphy = wiphy;
-
- local->hw.priv = (char *)local +
- ((sizeof(struct ieee80211_local) +
- NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
-
- BUG_ON(!ops->tx);
- BUG_ON(!ops->start);
- BUG_ON(!ops->stop);
- BUG_ON(!ops->config);
- BUG_ON(!ops->add_interface);
- BUG_ON(!ops->remove_interface);
- BUG_ON(!ops->configure_filter);
- local->ops = ops;
-
- /* for now, mdev needs sub_if_data :/ */
- mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
- "wmaster%d", ether_setup);
- if (!mdev) {
- wiphy_free(wiphy);
- return NULL;
- }
-
- sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
- mdev->ieee80211_ptr = &sdata->wdev;
- sdata->wdev.wiphy = wiphy;
-
- local->hw.queues = 1; /* default */
-
- local->mdev = mdev;
-
- local->bridge_packets = 1;
-
- local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
- local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
- local->short_retry_limit = 7;
- local->long_retry_limit = 4;
- local->hw.conf.radio_enabled = 1;
-
- INIT_LIST_HEAD(&local->interfaces);
-
- INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
- ieee80211_rx_bss_list_init(mdev);
-
- sta_info_init(local);
-
- mdev->hard_start_xmit = ieee80211_master_start_xmit;
- mdev->open = ieee80211_master_open;
- mdev->stop = ieee80211_master_stop;
- mdev->type = ARPHRD_IEEE80211;
- mdev->header_ops = &ieee80211_header_ops;
- mdev->set_multicast_list = ieee80211_master_set_multicast_list;
-
- sdata->vif.type = IEEE80211_IF_TYPE_AP;
- sdata->dev = mdev;
- sdata->local = local;
- sdata->u.ap.force_unicast_rateidx = -1;
- sdata->u.ap.max_ratectrl_rateidx = -1;
- ieee80211_if_sdata_init(sdata);
- /* no RCU needed since we're still during init phase */
- list_add_tail(&sdata->list, &local->interfaces);
-
- tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
- (unsigned long)local);
- tasklet_disable(&local->tx_pending_tasklet);
-
- tasklet_init(&local->tasklet,
- ieee80211_tasklet_handler,
- (unsigned long) local);
- tasklet_disable(&local->tasklet);
-
- skb_queue_head_init(&local->skb_queue);
- skb_queue_head_init(&local->skb_queue_unreliable);
-
- return local_to_hw(local);
-}
-EXPORT_SYMBOL(ieee80211_alloc_hw);
-
-int ieee80211_register_hw(struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- const char *name;
- int result;
- enum ieee80211_band band;
-
- /*
- * generic code guarantees at least one band,
- * set this very early because much code assumes
- * that hw.conf.channel is assigned
- */
- for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
- struct ieee80211_supported_band *sband;
-
- sband = local->hw.wiphy->bands[band];
- if (sband) {
- /* init channel we're on */
- local->hw.conf.channel =
- local->oper_channel =
- local->scan_channel = &sband->channels[0];
- break;
- }
- }
-
- result = wiphy_register(local->hw.wiphy);
- if (result < 0)
- return result;
-
- name = wiphy_dev(local->hw.wiphy)->driver->name;
- local->hw.workqueue = create_singlethread_workqueue(name);
- if (!local->hw.workqueue) {
- result = -ENOMEM;
- goto fail_workqueue;
- }
-
- /*
- * The hardware needs headroom for sending the frame,
- * and we need some headroom for passing the frame to monitor
- * interfaces, but never both at the same time.
- */
- local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
- sizeof(struct ieee80211_tx_status_rtap_hdr));
-
- debugfs_hw_add(local);
-
- local->hw.conf.beacon_int = 1000;
-
- local->wstats_flags |= local->hw.max_rssi ?
- IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
- local->wstats_flags |= local->hw.max_signal ?
- IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
- local->wstats_flags |= local->hw.max_noise ?
- IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
- if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
- local->wstats_flags |= IW_QUAL_DBM;
-
- result = sta_info_start(local);
- if (result < 0)
- goto fail_sta_info;
-
- rtnl_lock();
- result = dev_alloc_name(local->mdev, local->mdev->name);
- if (result < 0)
- goto fail_dev;
-
- memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
- SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
-
- result = register_netdevice(local->mdev);
- if (result < 0)
- goto fail_dev;
-
- ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
- ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
-
- result = ieee80211_init_rate_ctrl_alg(local,
- hw->rate_control_algorithm);
- if (result < 0) {
- printk(KERN_DEBUG "%s: Failed to initialize rate control "
- "algorithm\n", wiphy_name(local->hw.wiphy));
- goto fail_rate;
- }
-
- result = ieee80211_wep_init(local);
-
- if (result < 0) {
- printk(KERN_DEBUG "%s: Failed to initialize wep\n",
- wiphy_name(local->hw.wiphy));
- goto fail_wep;
- }
-
- ieee80211_install_qdisc(local->mdev);
-
- /* add one default STA interface */
- result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
- IEEE80211_IF_TYPE_STA);
- if (result)
- printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
- wiphy_name(local->hw.wiphy));
-
- local->reg_state = IEEE80211_DEV_REGISTERED;
- rtnl_unlock();
-
- ieee80211_led_init(local);
-
- return 0;
-
-fail_wep:
- rate_control_deinitialize(local);
-fail_rate:
- ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
- unregister_netdevice(local->mdev);
-fail_dev:
- rtnl_unlock();
- sta_info_stop(local);
-fail_sta_info:
- debugfs_hw_del(local);
- destroy_workqueue(local->hw.workqueue);
-fail_workqueue:
- wiphy_unregister(local->hw.wiphy);
- return result;
-}
-EXPORT_SYMBOL(ieee80211_register_hw);
-
-void ieee80211_unregister_hw(struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_sub_if_data *sdata, *tmp;
-
- tasklet_kill(&local->tx_pending_tasklet);
- tasklet_kill(&local->tasklet);
-
- rtnl_lock();
-
- BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
-
- local->reg_state = IEEE80211_DEV_UNREGISTERED;
-
- /*
- * At this point, interface list manipulations are fine
- * because the driver cannot be handing us frames any
- * more and the tasklet is killed.
- */
-
- /*
- * First, we remove all non-master interfaces. Do this because they
- * may have bss pointer dependency on the master, and when we free
- * the master these would be freed as well, breaking our list
- * iteration completely.
- */
- list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
- if (sdata->dev == local->mdev)
- continue;
- list_del(&sdata->list);
- __ieee80211_if_del(local, sdata);
- }
-
- /* then, finally, remove the master interface */
- __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
-
- rtnl_unlock();
-
- ieee80211_rx_bss_list_deinit(local->mdev);
- ieee80211_clear_tx_pending(local);
- sta_info_stop(local);
- rate_control_deinitialize(local);
- debugfs_hw_del(local);
-
- if (skb_queue_len(&local->skb_queue)
- || skb_queue_len(&local->skb_queue_unreliable))
- printk(KERN_WARNING "%s: skb_queue not empty\n",
- wiphy_name(local->hw.wiphy));
- skb_queue_purge(&local->skb_queue);
- skb_queue_purge(&local->skb_queue_unreliable);
-
- destroy_workqueue(local->hw.workqueue);
- wiphy_unregister(local->hw.wiphy);
- ieee80211_wep_free(local);
- ieee80211_led_exit(local);
-}
-EXPORT_SYMBOL(ieee80211_unregister_hw);
-
-void ieee80211_free_hw(struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = hw_to_local(hw);
-
- ieee80211_if_free(local->mdev);
- wiphy_free(local->hw.wiphy);
-}
-EXPORT_SYMBOL(ieee80211_free_hw);
-
-static int __init ieee80211_init(void)
-{
- struct sk_buff *skb;
- int ret;
-
- BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
-
- ret = rc80211_simple_init();
- if (ret)
- goto out;
-
- ret = rc80211_pid_init();
- if (ret)
- goto out_cleanup_simple;
-
- ret = ieee80211_wme_register();
- if (ret) {
- printk(KERN_DEBUG "ieee80211_init: failed to "
- "initialize WME (err=%d)\n", ret);
- goto out_cleanup_pid;
- }
-
- ieee80211_debugfs_netdev_init();
-
- return 0;
-
- out_cleanup_pid:
- rc80211_pid_exit();
- out_cleanup_simple:
- rc80211_simple_exit();
- out:
- return ret;
-}
-
-static void __exit ieee80211_exit(void)
-{
- rc80211_simple_exit();
- rc80211_pid_exit();
-
- ieee80211_wme_unregister();
- ieee80211_debugfs_netdev_exit();
-}
-
-
-subsys_initcall(ieee80211_init);
-module_exit(ieee80211_exit);
-
-MODULE_DESCRIPTION("IEEE 802.11 subsystem");
-MODULE_LICENSE("GPL");
projects / openwrt.git / blobdiff