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![Johannes Berg](/assets/img/avatar_default.png)
In "mac80211: make master iface not wireless" I accidentally forgot to include these changes ... leading to the expected BUG_ON errors. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
791 lines
21 KiB
C
791 lines
21 KiB
C
/*
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* Interface handling (except master interface)
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*
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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 (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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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 <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "sta_info.h"
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#include "debugfs_netdev.h"
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#include "mesh.h"
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#include "led.h"
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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 == NL80211_IFTYPE_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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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 == NL80211_IFTYPE_MONITOR ||
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type2 == NL80211_IFTYPE_MONITOR ||
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(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
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(type1 == NL80211_IFTYPE_WDS &&
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(type2 == NL80211_IFTYPE_WDS ||
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type2 == NL80211_IFTYPE_AP)) ||
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(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
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(type1 == NL80211_IFTYPE_AP_VLAN &&
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(type2 == NL80211_IFTYPE_AP ||
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type2 == NL80211_IFTYPE_AP_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 = IEEE80211_DEV_TO_SUB_IF(dev);
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struct ieee80211_sub_if_data *nsdata;
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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struct ieee80211_if_init_conf conf;
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u32 changed = 0;
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int res;
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bool need_hw_reconfig = 0;
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u8 null_addr[ETH_ALEN] = {0};
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/* fail early if user set an invalid address */
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if (compare_ether_addr(dev->dev_addr, null_addr) &&
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!is_valid_ether_addr(dev->dev_addr))
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return -EADDRNOTAVAIL;
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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 && 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 == NL80211_IFTYPE_ADHOC &&
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nsdata->vif.type == NL80211_IFTYPE_ADHOC)
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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 == NL80211_IFTYPE_AP_VLAN &&
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nsdata->vif.type == NL80211_IFTYPE_AP)
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sdata->bss = &nsdata->u.ap;
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}
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}
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_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 NL80211_IFTYPE_AP_VLAN:
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if (!sdata->bss)
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return -ENOLINK;
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list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
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break;
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case NL80211_IFTYPE_AP:
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sdata->bss = &sdata->u.ap;
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break;
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case NL80211_IFTYPE_MESH_POINT:
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if (!ieee80211_vif_is_mesh(&sdata->vif))
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break;
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/* mesh ifaces must set allmulti to forward mcast traffic */
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atomic_inc(&local->iff_allmultis);
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break;
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_MONITOR:
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case NL80211_IFTYPE_ADHOC:
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/* no special treatment */
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break;
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case NL80211_IFTYPE_UNSPECIFIED:
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case __NL80211_IFTYPE_AFTER_LAST:
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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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goto err_del_bss;
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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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/*
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* Check all interfaces and copy the hopefully now-present
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* MAC address to those that have the special null one.
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*/
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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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/*
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* No need to check netif_running since we do not allow
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* it to start up with this invalid address.
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*/
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if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
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memcpy(ndev->dev_addr,
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local->hw.wiphy->perm_addr,
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ETH_ALEN);
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}
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if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
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memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
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ETH_ALEN);
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/*
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* Validate the MAC address for this device.
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*/
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if (!is_valid_ether_addr(dev->dev_addr)) {
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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 -EADDRNOTAVAIL;
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}
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP_VLAN:
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/* no need to tell driver */
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break;
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case NL80211_IFTYPE_MONITOR:
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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_addr_lock_bh(local->mdev);
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ieee80211_configure_filter(local);
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netif_addr_unlock_bh(local->mdev);
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break;
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_ADHOC:
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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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if (ieee80211_vif_is_mesh(&sdata->vif))
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ieee80211_start_mesh(sdata);
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changed |= ieee80211_reset_erp_info(sdata);
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ieee80211_bss_info_change_notify(sdata, changed);
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ieee80211_enable_keys(sdata);
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if (sdata->vif.type == NL80211_IFTYPE_STATION &&
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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 == NL80211_IFTYPE_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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/* no locking required since STA is not live yet */
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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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* set default queue parameters so drivers don't
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* need to initialise the hardware if the hardware
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* doesn't start up with sane defaults
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*/
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ieee80211_set_wmm_default(sdata);
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}
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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 == NL80211_IFTYPE_STATION ||
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sdata->vif.type == NL80211_IFTYPE_ADHOC) {
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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_tx_start_all_queues(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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err_del_bss:
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sdata->bss = NULL;
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if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
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list_del(&sdata->u.vlan.list);
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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_tx_stop_all_queues(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(sdata,
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sta->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 == NL80211_IFTYPE_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 NL80211_IFTYPE_AP_VLAN:
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list_del(&sdata->u.vlan.list);
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/* no need to tell driver */
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break;
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case NL80211_IFTYPE_MONITOR:
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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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local->monitors--;
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if (local->monitors == 0)
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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_addr_lock_bh(local->mdev);
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ieee80211_configure_filter(local);
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netif_addr_unlock_bh(local->mdev);
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break;
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_ADHOC:
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sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
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memset(sdata->u.sta.bssid, 0, ETH_ALEN);
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del_timer_sync(&sdata->u.sta.timer);
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/*
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* If the timer fired while we waited for it, it will have
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* requeued the work. Now the work will be running again
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* but will not rearm the timer again because it checks
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* whether the interface is running, which, at this point,
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* it no longer is.
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*/
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cancel_work_sync(&sdata->u.sta.work);
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/*
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* When we get here, the interface is marked down.
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* Call synchronize_rcu() to wait for the RX path
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* should it be using the interface and enqueuing
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* frames at this very time on another CPU.
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*/
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synchronize_rcu();
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skb_queue_purge(&sdata->u.sta.skb_queue);
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sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
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kfree(sdata->u.sta.extra_ie);
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sdata->u.sta.extra_ie = NULL;
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sdata->u.sta.extra_ie_len = 0;
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/* fall through */
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case NL80211_IFTYPE_MESH_POINT:
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if (ieee80211_vif_is_mesh(&sdata->vif)) {
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/* allmulti is always set on mesh ifaces */
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atomic_dec(&local->iff_allmultis);
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ieee80211_stop_mesh(sdata);
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}
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/* fall through */
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default:
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if (local->scan_sdata == sdata) {
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if (!local->ops->hw_scan)
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cancel_delayed_work_sync(&local->scan_work);
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/*
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* The software scan can no longer run now, so we can
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* clear out the scan_sdata reference. However, the
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* hardware scan may still be running. The complete
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* function must be prepared to handle a NULL value.
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*/
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local->scan_sdata = NULL;
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/*
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* The memory barrier guarantees that another CPU
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* that is hardware-scanning will now see the fact
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* that this interface is gone.
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*/
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smp_mb();
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/*
|
|
* If software scanning, complete the scan but since
|
|
* the scan_sdata is NULL already don't send out a
|
|
* scan event to userspace -- the scan is incomplete.
|
|
*/
|
|
if (local->sw_scanning)
|
|
ieee80211_scan_completed(&local->hw);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
sdata->bss = NULL;
|
|
|
|
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);
|
|
|
|
flush_workqueue(local->hw.workqueue);
|
|
|
|
tasklet_disable(&local->tx_pending_tasklet);
|
|
tasklet_disable(&local->tasklet);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ieee80211_set_multicast_list(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
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 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 = free_netdev;
|
|
/* we will validate the address ourselves in ->open */
|
|
dev->validate_addr = NULL;
|
|
}
|
|
/*
|
|
* Called when the netdev is removed or, by the code below, before
|
|
* the interface type changes.
|
|
*/
|
|
static void ieee80211_teardown_sdata(struct net_device *dev)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct beacon_data *beacon;
|
|
struct sk_buff *skb;
|
|
int flushed;
|
|
int i;
|
|
|
|
/* free extra data */
|
|
ieee80211_free_keys(sdata);
|
|
|
|
ieee80211_debugfs_remove_netdev(sdata);
|
|
|
|
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
|
|
__skb_queue_purge(&sdata->fragments[i].skb_list);
|
|
sdata->fragment_next = 0;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_AP:
|
|
beacon = sdata->u.ap.beacon;
|
|
rcu_assign_pointer(sdata->u.ap.beacon, NULL);
|
|
synchronize_rcu();
|
|
kfree(beacon);
|
|
|
|
while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
|
|
local->total_ps_buffered--;
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
mesh_rmc_free(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
kfree(sdata->u.sta.extra_ie);
|
|
kfree(sdata->u.sta.assocreq_ies);
|
|
kfree(sdata->u.sta.assocresp_ies);
|
|
kfree_skb(sdata->u.sta.probe_resp);
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
break;
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case __NL80211_IFTYPE_AFTER_LAST:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
flushed = sta_info_flush(local, sdata);
|
|
WARN_ON(flushed);
|
|
}
|
|
|
|
/*
|
|
* Helper function to initialise an interface to a specific type.
|
|
*/
|
|
static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
|
|
enum nl80211_iftype type)
|
|
{
|
|
/* clear type-dependent union */
|
|
memset(&sdata->u, 0, sizeof(sdata->u));
|
|
|
|
/* and set some type-dependent values */
|
|
sdata->vif.type = type;
|
|
sdata->dev->hard_start_xmit = ieee80211_subif_start_xmit;
|
|
sdata->wdev.iftype = type;
|
|
|
|
/* only monitor differs */
|
|
sdata->dev->type = ARPHRD_ETHER;
|
|
|
|
switch (type) {
|
|
case NL80211_IFTYPE_AP:
|
|
skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
|
|
INIT_LIST_HEAD(&sdata->u.ap.vlans);
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_sta_setup_sdata(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
ieee80211_mesh_init_sdata(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MONITOR:
|
|
sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
|
|
sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit;
|
|
sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
|
|
MONITOR_FLAG_OTHER_BSS;
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
break;
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case __NL80211_IFTYPE_AFTER_LAST:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
ieee80211_debugfs_add_netdev(sdata);
|
|
}
|
|
|
|
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
|
|
enum nl80211_iftype type)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
if (type == sdata->vif.type)
|
|
return 0;
|
|
|
|
/*
|
|
* We could, here, on changes between IBSS/STA/MESH modes,
|
|
* invoke an MLME function instead that disassociates etc.
|
|
* and goes into the requested mode.
|
|
*/
|
|
|
|
if (netif_running(sdata->dev))
|
|
return -EBUSY;
|
|
|
|
/* Purge and reset type-dependent state. */
|
|
ieee80211_teardown_sdata(sdata->dev);
|
|
ieee80211_setup_sdata(sdata, type);
|
|
|
|
/* reset some values that shouldn't be kept across type changes */
|
|
sdata->bss_conf.basic_rates =
|
|
ieee80211_mandatory_rates(sdata->local,
|
|
sdata->local->hw.conf.channel->band);
|
|
sdata->drop_unencrypted = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
|
|
struct net_device **new_dev, enum nl80211_iftype type,
|
|
struct vif_params *params)
|
|
{
|
|
struct net_device *ndev;
|
|
struct ieee80211_sub_if_data *sdata = NULL;
|
|
int ret, i;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
|
|
name, ieee80211_if_setup);
|
|
if (!ndev)
|
|
return -ENOMEM;
|
|
|
|
ndev->needed_headroom = local->tx_headroom +
|
|
4*6 /* four MAC addresses */
|
|
+ 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
|
|
+ 6 /* mesh */
|
|
+ 8 /* rfc1042/bridge tunnel */
|
|
- ETH_HLEN /* ethernet hard_header_len */
|
|
+ IEEE80211_ENCRYPT_HEADROOM;
|
|
ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
|
|
|
|
ret = dev_alloc_name(ndev, ndev->name);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
|
|
SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
|
|
|
|
/* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
|
|
sdata = netdev_priv(ndev);
|
|
ndev->ieee80211_ptr = &sdata->wdev;
|
|
|
|
/* initialise type-independent data */
|
|
sdata->wdev.wiphy = local->hw.wiphy;
|
|
sdata->local = local;
|
|
sdata->dev = ndev;
|
|
|
|
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
|
|
skb_queue_head_init(&sdata->fragments[i].skb_list);
|
|
|
|
INIT_LIST_HEAD(&sdata->key_list);
|
|
|
|
sdata->force_unicast_rateidx = -1;
|
|
sdata->max_ratectrl_rateidx = -1;
|
|
|
|
/* setup type-dependent data */
|
|
ieee80211_setup_sdata(sdata, type);
|
|
|
|
ret = register_netdevice(ndev);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ndev->uninit = ieee80211_teardown_sdata;
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif) &&
|
|
params && params->mesh_id_len)
|
|
ieee80211_sdata_set_mesh_id(sdata,
|
|
params->mesh_id_len,
|
|
params->mesh_id);
|
|
|
|
list_add_tail_rcu(&sdata->list, &local->interfaces);
|
|
|
|
if (new_dev)
|
|
*new_dev = ndev;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
free_netdev(ndev);
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
list_del_rcu(&sdata->list);
|
|
synchronize_rcu();
|
|
unregister_netdevice(sdata->dev);
|
|
}
|
|
|
|
/*
|
|
* Remove all interfaces, may only be called at hardware unregistration
|
|
* time because it doesn't do RCU-safe list removals.
|
|
*/
|
|
void ieee80211_remove_interfaces(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata, *tmp;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
|
|
list_del(&sdata->list);
|
|
unregister_netdevice(sdata->dev);
|
|
}
|
|
}
|