![Assaf Krauss](/assets/img/avatar_default.png)
This patch fixes the issue of slow reconnection to an IBSS cell after disconnection from it. Now the interface's bssid is reset upon ifdown. ieee80211_sta_find_ibss: if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel->center_freq, ifsta->ssid, ifsta->ssid_len))) Note: In general disconnection is still not handled properly in mac80211 Signed-off-by: Assaf Krauss <assaf.krauss@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1907 lines
53 KiB
C
1907 lines
53 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitmap.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "rate.h"
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#include "mesh.h"
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#include "wep.h"
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#include "wme.h"
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#include "aes_ccm.h"
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#include "led.h"
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#include "cfg.h"
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#include "debugfs.h"
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#include "debugfs_netdev.h"
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#define SUPP_MCS_SET_LEN 16
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/*
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* For seeing transmitted packets on monitor interfaces
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* we have a radiotap header too.
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*/
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struct ieee80211_tx_status_rtap_hdr {
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struct ieee80211_radiotap_header hdr;
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__le16 tx_flags;
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u8 data_retries;
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} __attribute__ ((packed));
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/* common interface routines */
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static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
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{
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memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
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return ETH_ALEN;
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}
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/* must be called under mdev tx lock */
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static void ieee80211_configure_filter(struct ieee80211_local *local)
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{
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unsigned int changed_flags;
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unsigned int new_flags = 0;
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if (atomic_read(&local->iff_promiscs))
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new_flags |= FIF_PROMISC_IN_BSS;
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if (atomic_read(&local->iff_allmultis))
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new_flags |= FIF_ALLMULTI;
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if (local->monitors)
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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if (local->fif_fcsfail)
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new_flags |= FIF_FCSFAIL;
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if (local->fif_plcpfail)
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new_flags |= FIF_PLCPFAIL;
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if (local->fif_control)
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new_flags |= FIF_CONTROL;
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if (local->fif_other_bss)
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new_flags |= FIF_OTHER_BSS;
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changed_flags = local->filter_flags ^ new_flags;
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/* be a bit nasty */
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new_flags |= (1<<31);
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local->ops->configure_filter(local_to_hw(local),
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changed_flags, &new_flags,
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local->mdev->mc_count,
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local->mdev->mc_list);
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WARN_ON(new_flags & (1<<31));
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local->filter_flags = new_flags & ~(1<<31);
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}
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/* master interface */
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static int ieee80211_master_open(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_sub_if_data *sdata;
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int res = -EOPNOTSUPP;
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (sdata->dev != dev && netif_running(sdata->dev)) {
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res = 0;
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break;
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}
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}
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return res;
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}
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static int ieee80211_master_stop(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_sub_if_data *sdata;
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(sdata, &local->interfaces, list)
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if (sdata->dev != dev && netif_running(sdata->dev))
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dev_close(sdata->dev);
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return 0;
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}
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static void ieee80211_master_set_multicast_list(struct net_device *dev)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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ieee80211_configure_filter(local);
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}
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/* regular interfaces */
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static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
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{
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int meshhdrlen;
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
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/* FIX: what would be proper limits for MTU?
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* This interface uses 802.3 frames. */
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if (new_mtu < 256 ||
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new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
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printk(KERN_WARNING "%s: invalid MTU %d\n",
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dev->name, new_mtu);
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return -EINVAL;
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}
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#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
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printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
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#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
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dev->mtu = new_mtu;
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return 0;
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}
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static inline int identical_mac_addr_allowed(int type1, int type2)
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{
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return (type1 == IEEE80211_IF_TYPE_MNTR ||
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type2 == IEEE80211_IF_TYPE_MNTR ||
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(type1 == IEEE80211_IF_TYPE_AP &&
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type2 == IEEE80211_IF_TYPE_WDS) ||
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(type1 == IEEE80211_IF_TYPE_WDS &&
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(type2 == IEEE80211_IF_TYPE_WDS ||
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type2 == IEEE80211_IF_TYPE_AP)) ||
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(type1 == IEEE80211_IF_TYPE_AP &&
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type2 == IEEE80211_IF_TYPE_VLAN) ||
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(type1 == IEEE80211_IF_TYPE_VLAN &&
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(type2 == IEEE80211_IF_TYPE_AP ||
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type2 == IEEE80211_IF_TYPE_VLAN)));
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}
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static int ieee80211_open(struct net_device *dev)
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{
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struct ieee80211_sub_if_data *sdata, *nsdata;
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_if_init_conf conf;
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int res;
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bool need_hw_reconfig = 0;
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struct sta_info *sta;
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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/* we hold the RTNL here so can safely walk the list */
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list_for_each_entry(nsdata, &local->interfaces, list) {
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struct net_device *ndev = nsdata->dev;
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if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
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/*
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* Allow only a single IBSS interface to be up at any
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* time. This is restricted because beacon distribution
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* cannot work properly if both are in the same IBSS.
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*
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* To remove this restriction we'd have to disallow them
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* from setting the same SSID on different IBSS interfaces
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* belonging to the same hardware. Then, however, we're
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* faced with having to adopt two different TSF timers...
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*/
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if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
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nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
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return -EBUSY;
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/*
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* Disallow multiple IBSS/STA mode interfaces.
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*
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* This is a technical restriction, it is possible although
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* most likely not IEEE 802.11 compliant to have multiple
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* STAs with just a single hardware (the TSF timer will not
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* be adjusted properly.)
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*
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* However, because mac80211 uses the master device's BSS
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* information for each STA/IBSS interface, doing this will
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* currently corrupt that BSS information completely, unless,
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* a not very useful case, both STAs are associated to the
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* same BSS.
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*
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* To remove this restriction, the BSS information needs to
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* be embedded in the STA/IBSS mode sdata instead of using
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* the master device's BSS structure.
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*/
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if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
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sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
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(nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
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nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
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return -EBUSY;
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/*
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* The remaining checks are only performed for interfaces
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* with the same MAC address.
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*/
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if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
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continue;
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/*
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* check whether it may have the same address
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*/
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if (!identical_mac_addr_allowed(sdata->vif.type,
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nsdata->vif.type))
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return -ENOTUNIQ;
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/*
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* can only add VLANs to enabled APs
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*/
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if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
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nsdata->vif.type == IEEE80211_IF_TYPE_AP)
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sdata->u.vlan.ap = nsdata;
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}
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}
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_WDS:
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if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
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return -ENOLINK;
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break;
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case IEEE80211_IF_TYPE_VLAN:
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if (!sdata->u.vlan.ap)
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return -ENOLINK;
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break;
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case IEEE80211_IF_TYPE_AP:
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_MNTR:
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case IEEE80211_IF_TYPE_IBSS:
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case IEEE80211_IF_TYPE_MESH_POINT:
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/* no special treatment */
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break;
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case IEEE80211_IF_TYPE_INVALID:
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/* cannot happen */
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WARN_ON(1);
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break;
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}
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if (local->open_count == 0) {
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res = 0;
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if (local->ops->start)
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res = local->ops->start(local_to_hw(local));
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if (res)
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return res;
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need_hw_reconfig = 1;
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ieee80211_led_radio(local, local->hw.conf.radio_enabled);
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}
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_VLAN:
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list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
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/* no need to tell driver */
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break;
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case IEEE80211_IF_TYPE_MNTR:
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if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
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local->cooked_mntrs++;
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break;
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}
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/* must be before the call to ieee80211_configure_filter */
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local->monitors++;
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if (local->monitors == 1)
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local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
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if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
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local->fif_fcsfail++;
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if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
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local->fif_plcpfail++;
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if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
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local->fif_control++;
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if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
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local->fif_other_bss++;
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netif_tx_lock_bh(local->mdev);
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ieee80211_configure_filter(local);
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netif_tx_unlock_bh(local->mdev);
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break;
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
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/* fall through */
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default:
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conf.vif = &sdata->vif;
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conf.type = sdata->vif.type;
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conf.mac_addr = dev->dev_addr;
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res = local->ops->add_interface(local_to_hw(local), &conf);
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if (res)
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goto err_stop;
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ieee80211_if_config(dev);
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ieee80211_reset_erp_info(dev);
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ieee80211_enable_keys(sdata);
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if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
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!(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
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netif_carrier_off(dev);
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else
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netif_carrier_on(dev);
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}
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if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
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/* Create STA entry for the WDS peer */
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sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
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GFP_KERNEL);
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if (!sta) {
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res = -ENOMEM;
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goto err_del_interface;
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}
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sta->flags |= WLAN_STA_AUTHORIZED;
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res = sta_info_insert(sta);
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if (res) {
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/* STA has been freed */
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goto err_del_interface;
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}
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}
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if (local->open_count == 0) {
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res = dev_open(local->mdev);
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WARN_ON(res);
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if (res)
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goto err_del_interface;
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tasklet_enable(&local->tx_pending_tasklet);
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tasklet_enable(&local->tasklet);
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}
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/*
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* set_multicast_list will be invoked by the networking core
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* which will check whether any increments here were done in
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* error and sync them down to the hardware as filter flags.
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*/
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if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
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atomic_inc(&local->iff_allmultis);
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if (sdata->flags & IEEE80211_SDATA_PROMISC)
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atomic_inc(&local->iff_promiscs);
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local->open_count++;
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if (need_hw_reconfig)
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ieee80211_hw_config(local);
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/*
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* ieee80211_sta_work is disabled while network interface
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* is down. Therefore, some configuration changes may not
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* yet be effective. Trigger execution of ieee80211_sta_work
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* to fix this.
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*/
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if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
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sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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queue_work(local->hw.workqueue, &ifsta->work);
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}
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netif_start_queue(dev);
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return 0;
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err_del_interface:
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local->ops->remove_interface(local_to_hw(local), &conf);
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err_stop:
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if (!local->open_count && local->ops->stop)
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local->ops->stop(local_to_hw(local));
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return res;
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}
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static int ieee80211_stop(struct net_device *dev)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_init_conf conf;
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struct sta_info *sta;
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/*
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* Stop TX on this interface first.
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*/
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netif_stop_queue(dev);
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/*
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* Now delete all active aggregation sessions.
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*/
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rcu_read_lock();
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list_for_each_entry_rcu(sta, &local->sta_list, list) {
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if (sta->sdata == sdata)
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ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
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}
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rcu_read_unlock();
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/*
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* Remove all stations associated with this interface.
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*
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* This must be done before calling ops->remove_interface()
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* because otherwise we can later invoke ops->sta_notify()
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* whenever the STAs are removed, and that invalidates driver
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* assumptions about always getting a vif pointer that is valid
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* (because if we remove a STA after ops->remove_interface()
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* the driver will have removed the vif info already!)
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*
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* We could relax this and only unlink the stations from the
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* hash table and list but keep them on a per-sdata list that
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* will be inserted back again when the interface is brought
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* up again, but I don't currently see a use case for that,
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* except with WDS which gets a STA entry created when it is
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* brought up.
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*/
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sta_info_flush(local, sdata);
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/*
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* Don't count this interface for promisc/allmulti while it
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* is down. dev_mc_unsync() will invoke set_multicast_list
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* on the master interface which will sync these down to the
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* hardware as filter flags.
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*/
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if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
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atomic_dec(&local->iff_allmultis);
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if (sdata->flags & IEEE80211_SDATA_PROMISC)
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atomic_dec(&local->iff_promiscs);
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dev_mc_unsync(local->mdev, dev);
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/* APs need special treatment */
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if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
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struct ieee80211_sub_if_data *vlan, *tmp;
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struct beacon_data *old_beacon = sdata->u.ap.beacon;
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/* remove beacon */
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rcu_assign_pointer(sdata->u.ap.beacon, NULL);
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synchronize_rcu();
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kfree(old_beacon);
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/* down all dependent devices, that is VLANs */
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list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
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u.vlan.list)
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dev_close(vlan->dev);
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WARN_ON(!list_empty(&sdata->u.ap.vlans));
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}
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local->open_count--;
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_VLAN:
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list_del(&sdata->u.vlan.list);
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sdata->u.vlan.ap = NULL;
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/* no need to tell driver */
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break;
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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_MESH_POINT:
|
|
case IEEE80211_IF_TYPE_STA:
|
|
case IEEE80211_IF_TYPE_IBSS:
|
|
sdata->u.sta.state = IEEE80211_DISABLED;
|
|
memset(sdata->u.sta.bssid, 0, ETH_ALEN);
|
|
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 */
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, ra);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "Could not find the station\n");
|
|
rcu_read_unlock();
|
|
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.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
|
|
ret = -EBUSY;
|
|
goto start_ba_exit;
|
|
}
|
|
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
|
/* 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;
|
|
}
|
|
|
|
/* prepare A-MPDU MLME for Tx aggregation */
|
|
sta->ampdu_mlme.tid_tx[tid] =
|
|
kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
|
|
if (!sta->ampdu_mlme.tid_tx[tid]) {
|
|
if (net_ratelimit())
|
|
printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
|
|
tid);
|
|
ret = -ENOMEM;
|
|
goto start_ba_exit;
|
|
}
|
|
/* Tx timer */
|
|
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
|
|
sta_addba_resp_timer_expired;
|
|
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
|
|
(unsigned long)&sta->timer_to_tid[tid];
|
|
init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
|
|
|
/* 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 - queue unavailable for"
|
|
" tid %d\n", tid);
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
goto start_ba_err;
|
|
}
|
|
sdata = sta->sdata;
|
|
|
|
/* 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 unavailable for"
|
|
" tid %d\n", tid);
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
*state = HT_AGG_STATE_IDLE;
|
|
goto start_ba_err;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* 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->sdata->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);
|
|
goto start_ba_exit;
|
|
|
|
start_ba_err:
|
|
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
|
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
|
spin_unlock_bh(&local->mdev->queue_lock);
|
|
ret = -EBUSY;
|
|
start_ba_exit:
|
|
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
|
rcu_read_unlock();
|
|
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;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(local, ra);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* check if the TID is in aggregation */
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
|
spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
|
|
|
|
if (*state != HT_AGG_STATE_OPERATIONAL) {
|
|
ret = -ENOENT;
|
|
goto stop_BA_exit;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
|
printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
|
|
print_mac(mac, ra), tid);
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
|
|
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);
|
|
rcu_read_unlock();
|
|
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;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(local, ra);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
printk(KERN_DEBUG "Could not find station: %s\n",
|
|
print_mac(mac, ra));
|
|
return;
|
|
}
|
|
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
|
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);
|
|
rcu_read_unlock();
|
|
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);
|
|
rcu_read_unlock();
|
|
}
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
|
printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
|
|
print_mac(mac, ra), tid);
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(local, ra);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "Could not find station: %s\n",
|
|
print_mac(mac, ra));
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
|
|
|
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");
|
|
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
if (*state & HT_AGG_STATE_INITIATOR_MSK)
|
|
ieee80211_send_delba(sta->sdata->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.addba_req_num[tid] = 0;
|
|
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
|
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
|
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
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;
|
|
}
|
|
|
|
/* 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 (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
conf.beacon = beacon;
|
|
conf.beacon_control = control;
|
|
ieee80211_start_mesh(dev);
|
|
} 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)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
|
|
(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
|
|
return ieee80211_if_config_beacon(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_handle_ht should be used only after legacy configuration
|
|
* has been determined namely band, as ht configuration depends upon
|
|
* the hardware's HT abilities for a _specific_ band.
|
|
*/
|
|
u32 ieee80211_handle_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;
|
|
struct ieee80211_ht_info ht_conf;
|
|
struct ieee80211_ht_bss_info ht_bss_conf;
|
|
int i;
|
|
u32 changed = 0;
|
|
|
|
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 0;
|
|
}
|
|
|
|
memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
|
|
memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
|
|
|
|
if (enable_ht) {
|
|
if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
|
|
changed |= BSS_CHANGED_HT;
|
|
|
|
conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
|
|
ht_conf.ht_supported = 1;
|
|
|
|
ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
|
|
ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
|
|
ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
|
|
|
|
for (i = 0; i < SUPP_MCS_SET_LEN; i++)
|
|
ht_conf.supp_mcs_set[i] =
|
|
sband->ht_info.supp_mcs_set[i] &
|
|
req_ht_cap->supp_mcs_set[i];
|
|
|
|
ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
|
|
ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
|
|
ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
|
|
|
|
ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
|
|
ht_conf.ampdu_density = req_ht_cap->ampdu_density;
|
|
|
|
/* if bss configuration changed store the new one */
|
|
if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
|
|
memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
|
|
changed |= BSS_CHANGED_HT;
|
|
memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
|
|
memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
|
|
}
|
|
} else {
|
|
if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
|
|
changed |= BSS_CHANGED_HT;
|
|
conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
|
|
struct sta_info *sta,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_tx_status *status)
|
|
{
|
|
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 wakes up for the next time.
|
|
*/
|
|
sta->flags |= WLAN_STA_CLEAR_PS_FILT;
|
|
|
|
/*
|
|
* This code races in the following way:
|
|
*
|
|
* (1) STA sends frame indicating it will go to sleep and does so
|
|
* (2) hardware/firmware adds STA to filter list, passes frame up
|
|
* (3) hardware/firmware processes TX fifo and suppresses a frame
|
|
* (4) we get TX status before having processed the frame and
|
|
* knowing that the STA has gone to sleep.
|
|
*
|
|
* This is actually quite unlikely even when both those events are
|
|
* processed from interrupts coming in quickly after one another or
|
|
* even at the same time because we queue both TX status events and
|
|
* RX frames to be processed by a tasklet and process them in the
|
|
* same order that they were received or TX status last. Hence, there
|
|
* is no race as long as the frame RX is processed before the next TX
|
|
* status, which drivers can ensure, see below.
|
|
*
|
|
* Note that this can only happen if the hardware or firmware can
|
|
* actually add STAs to the filter list, if this is done by the
|
|
* driver in response to set_tim() (which will only reduce the race
|
|
* this whole filtering tries to solve, not completely solve it)
|
|
* this situation cannot happen.
|
|
*
|
|
* To completely solve this race drivers need to make sure that they
|
|
* (a) don't mix the irq-safe/not irq-safe TX status/RX processing
|
|
* functions and
|
|
* (b) always process RX events before TX status events if ordering
|
|
* can be unknown, for example with different interrupt status
|
|
* bits.
|
|
*/
|
|
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);
|
|
return;
|
|
}
|
|
|
|
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);
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
|
|
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;
|
|
ieee80211_handle_filtered_frame(local, sta,
|
|
skb, status);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
|
|
struct sta_info *sta;
|
|
sta = sta_info_get(local, hdr->addr1);
|
|
if (sta) {
|
|
ieee80211_handle_filtered_frame(local, sta, skb,
|
|
status);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
} else
|
|
rate_control_tx_status(local->mdev, skb, status);
|
|
|
|
rcu_read_unlock();
|
|
|
|
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 ieee80211_local *local;
|
|
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;
|
|
|
|
local->hw.queues = 1; /* default */
|
|
|
|
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);
|
|
|
|
spin_lock_init(&local->key_lock);
|
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
|
|
|
|
sta_info_init(local);
|
|
|
|
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;
|
|
struct net_device *mdev;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* for now, mdev needs sub_if_data :/ */
|
|
mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
|
|
"wmaster%d", ether_setup);
|
|
if (!mdev)
|
|
goto fail_mdev_alloc;
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
|
|
mdev->ieee80211_ptr = &sdata->wdev;
|
|
sdata->wdev.wiphy = local->hw.wiphy;
|
|
|
|
local->mdev = mdev;
|
|
|
|
ieee80211_rx_bss_list_init(mdev);
|
|
|
|
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);
|
|
|
|
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, NULL);
|
|
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);
|
|
local->mdev = NULL;
|
|
fail_dev:
|
|
rtnl_unlock();
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
debugfs_hw_del(local);
|
|
destroy_workqueue(local->hw.workqueue);
|
|
fail_workqueue:
|
|
if (local->mdev != NULL) {
|
|
ieee80211_if_free(local->mdev);
|
|
local->mdev = NULL;
|
|
}
|
|
fail_mdev_alloc:
|
|
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);
|
|
ieee80211_if_free(local->mdev);
|
|
local->mdev = NULL;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
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_pid_init();
|
|
if (ret)
|
|
goto out;
|
|
|
|
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:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_pid_exit();
|
|
|
|
/*
|
|
* For key todo, it'll be empty by now but the work
|
|
* might still be scheduled.
|
|
*/
|
|
flush_scheduled_work();
|
|
|
|
if (mesh_allocated)
|
|
ieee80211s_stop();
|
|
|
|
ieee80211_wme_unregister();
|
|
ieee80211_debugfs_netdev_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|