forked from Minki/linux
mac80211: move regular interface handling
Move the code to handle regular interfaces out of main.c and into iface.c, keep only the master interface stuff in main.c. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
John W. Linville
parent
05c914fe33
commit
0d143fe1e2
@ -891,6 +891,7 @@ u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
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struct ieee80211_ht_bss_info *req_bss_cap);
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
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u32 changed);
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void ieee80211_configure_filter(struct ieee80211_local *local);
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/* wireless extensions */
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extern const struct iw_handler_def ieee80211_iw_handler_def;
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@ -952,7 +953,6 @@ void ieee80211_rx_bss_put(struct ieee80211_local *local,
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struct ieee80211_bss *bss);
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/* interface handling */
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void ieee80211_if_setup(struct net_device *dev);
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int ieee80211_if_add(struct ieee80211_local *local, const char *name,
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struct net_device **new_dev, enum nl80211_iftype type,
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struct vif_params *params);
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@ -1,4 +1,6 @@
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/*
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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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@ -17,7 +19,539 @@
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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, *nsdata;
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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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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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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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, 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
|
||||
* 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);
|
||||
|
||||
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 */
|
||||
case NL80211_IFTYPE_MESH_POINT:
|
||||
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
||||
/* allmulti is always set on mesh ifaces */
|
||||
atomic_dec(&local->iff_allmultis);
|
||||
ieee80211_stop_mesh(sdata);
|
||||
}
|
||||
/* fall through */
|
||||
default:
|
||||
if (local->scan_sdata == sdata) {
|
||||
if (!local->ops->hw_scan)
|
||||
cancel_delayed_work_sync(&local->scan_work);
|
||||
/*
|
||||
* The software scan can no longer run now, so we can
|
||||
* clear out the scan_sdata reference. However, the
|
||||
* hardware scan may still be running. The complete
|
||||
* function must be prepared to handle a NULL value.
|
||||
*/
|
||||
local->scan_sdata = NULL;
|
||||
/*
|
||||
* The memory barrier guarantees that another CPU
|
||||
* that is hardware-scanning will now see the fact
|
||||
* that this interface is gone.
|
||||
*/
|
||||
smp_mb();
|
||||
/*
|
||||
* 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_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 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.
|
||||
|
||||
@ -45,16 +45,9 @@ struct ieee80211_tx_status_rtap_hdr {
|
||||
u8 data_retries;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
/* common interface routines */
|
||||
|
||||
static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
|
||||
{
|
||||
memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
|
||||
return ETH_ALEN;
|
||||
}
|
||||
|
||||
/* must be called under mdev tx lock */
|
||||
static void ieee80211_configure_filter(struct ieee80211_local *local)
|
||||
void ieee80211_configure_filter(struct ieee80211_local *local)
|
||||
{
|
||||
unsigned int changed_flags;
|
||||
unsigned int new_flags = 0;
|
||||
@ -97,6 +90,20 @@ static void ieee80211_configure_filter(struct ieee80211_local *local)
|
||||
|
||||
/* master interface */
|
||||
|
||||
static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
|
||||
{
|
||||
memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
|
||||
return ETH_ALEN;
|
||||
}
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
static int ieee80211_master_open(struct net_device *dev)
|
||||
{
|
||||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||||
@ -139,548 +146,6 @@ static void ieee80211_master_set_multicast_list(struct net_device *dev)
|
||||
ieee80211_configure_filter(local);
|
||||
}
|
||||
|
||||
/* regular interfaces */
|
||||
|
||||
static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
|
||||
{
|
||||
int meshhdrlen;
|
||||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||||
|
||||
meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
|
||||
|
||||
/* FIX: what would be proper limits for MTU?
|
||||
* This interface uses 802.3 frames. */
|
||||
if (new_mtu < 256 ||
|
||||
new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||||
printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
|
||||
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
|
||||
dev->mtu = new_mtu;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int identical_mac_addr_allowed(int type1, int type2)
|
||||
{
|
||||
return type1 == NL80211_IFTYPE_MONITOR ||
|
||||
type2 == NL80211_IFTYPE_MONITOR ||
|
||||
(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
|
||||
(type1 == NL80211_IFTYPE_WDS &&
|
||||
(type2 == NL80211_IFTYPE_WDS ||
|
||||
type2 == NL80211_IFTYPE_AP)) ||
|
||||
(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
|
||||
(type1 == NL80211_IFTYPE_AP_VLAN &&
|
||||
(type2 == NL80211_IFTYPE_AP ||
|
||||
type2 == NL80211_IFTYPE_AP_VLAN));
|
||||
}
|
||||
|
||||
static int ieee80211_open(struct net_device *dev)
|
||||
{
|
||||
struct ieee80211_sub_if_data *sdata, *nsdata;
|
||||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||||
struct sta_info *sta;
|
||||
struct ieee80211_if_init_conf conf;
|
||||
u32 changed = 0;
|
||||
int res;
|
||||
bool need_hw_reconfig = 0;
|
||||
u8 null_addr[ETH_ALEN] = {0};
|
||||
|
||||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||||
|
||||
/* fail early if user set an invalid address */
|
||||
if (compare_ether_addr(dev->dev_addr, null_addr) &&
|
||||
!is_valid_ether_addr(dev->dev_addr))
|
||||
return -EADDRNOTAVAIL;
|
||||
|
||||
/* we hold the RTNL here so can safely walk the list */
|
||||
list_for_each_entry(nsdata, &local->interfaces, list) {
|
||||
struct net_device *ndev = nsdata->dev;
|
||||
|
||||
if (ndev != dev && netif_running(ndev)) {
|
||||
/*
|
||||
* Allow only a single IBSS interface to be up at any
|
||||
* time. This is restricted because beacon distribution
|
||||
* cannot work properly if both are in the same IBSS.
|
||||
*
|
||||
* To remove this restriction we'd have to disallow them
|
||||
* from setting the same SSID on different IBSS interfaces
|
||||
* belonging to the same hardware. Then, however, we're
|
||||
* faced with having to adopt two different TSF timers...
|
||||
*/
|
||||
if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
|
||||
nsdata->vif.type == NL80211_IFTYPE_ADHOC)
|
||||
return -EBUSY;
|
||||
|
||||
/*
|
||||
* The remaining checks are only performed for interfaces
|
||||
* with the same MAC address.
|
||||
*/
|
||||
if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
|
||||
continue;
|
||||
|
||||
/*
|
||||
* check whether it may have the same address
|
||||
*/
|
||||
if (!identical_mac_addr_allowed(sdata->vif.type,
|
||||
nsdata->vif.type))
|
||||
return -ENOTUNIQ;
|
||||
|
||||
/*
|
||||
* can only add VLANs to enabled APs
|
||||
*/
|
||||
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
|
||||
nsdata->vif.type == NL80211_IFTYPE_AP)
|
||||
sdata->bss = &nsdata->u.ap;
|
||||
}
|
||||
}
|
||||
|
||||
switch (sdata->vif.type) {
|
||||
case NL80211_IFTYPE_WDS:
|
||||
if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
|
||||
return -ENOLINK;
|
||||
break;
|
||||
case NL80211_IFTYPE_AP_VLAN:
|
||||
if (!sdata->bss)
|
||||
return -ENOLINK;
|
||||
list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
|
||||
break;
|
||||
case NL80211_IFTYPE_AP:
|
||||
sdata->bss = &sdata->u.ap;
|
||||
break;
|
||||
case NL80211_IFTYPE_MESH_POINT:
|
||||
if (!ieee80211_vif_is_mesh(&sdata->vif))
|
||||
break;
|
||||
/* mesh ifaces must set allmulti to forward mcast traffic */
|
||||
atomic_inc(&local->iff_allmultis);
|
||||
break;
|
||||
case NL80211_IFTYPE_STATION:
|
||||
case NL80211_IFTYPE_MONITOR:
|
||||
case NL80211_IFTYPE_ADHOC:
|
||||
/* no special treatment */
|
||||
break;
|
||||
case NL80211_IFTYPE_UNSPECIFIED:
|
||||
case __NL80211_IFTYPE_AFTER_LAST:
|
||||
/* cannot happen */
|
||||
WARN_ON(1);
|
||||
break;
|
||||
}
|
||||
|
||||
if (local->open_count == 0) {
|
||||
res = 0;
|
||||
if (local->ops->start)
|
||||
res = local->ops->start(local_to_hw(local));
|
||||
if (res)
|
||||
goto err_del_bss;
|
||||
need_hw_reconfig = 1;
|
||||
ieee80211_led_radio(local, local->hw.conf.radio_enabled);
|
||||
}
|
||||
|
||||
/*
|
||||
* Check all interfaces and copy the hopefully now-present
|
||||
* MAC address to those that have the special null one.
|
||||
*/
|
||||
list_for_each_entry(nsdata, &local->interfaces, list) {
|
||||
struct net_device *ndev = nsdata->dev;
|
||||
|
||||
/*
|
||||
* No need to check netif_running since we do not allow
|
||||
* it to start up with this invalid address.
|
||||
*/
|
||||
if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
|
||||
memcpy(ndev->dev_addr,
|
||||
local->hw.wiphy->perm_addr,
|
||||
ETH_ALEN);
|
||||
}
|
||||
|
||||
if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
|
||||
memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
|
||||
ETH_ALEN);
|
||||
|
||||
/*
|
||||
* Validate the MAC address for this device.
|
||||
*/
|
||||
if (!is_valid_ether_addr(dev->dev_addr)) {
|
||||
if (!local->open_count && local->ops->stop)
|
||||
local->ops->stop(local_to_hw(local));
|
||||
return -EADDRNOTAVAIL;
|
||||
}
|
||||
|
||||
switch (sdata->vif.type) {
|
||||
case NL80211_IFTYPE_AP_VLAN:
|
||||
/* no need to tell driver */
|
||||
break;
|
||||
case NL80211_IFTYPE_MONITOR:
|
||||
if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
|
||||
local->cooked_mntrs++;
|
||||
break;
|
||||
}
|
||||
|
||||
/* must be before the call to ieee80211_configure_filter */
|
||||
local->monitors++;
|
||||
if (local->monitors == 1)
|
||||
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
|
||||
|
||||
if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
|
||||
local->fif_fcsfail++;
|
||||
if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
|
||||
local->fif_plcpfail++;
|
||||
if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
|
||||
local->fif_control++;
|
||||
if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
|
||||
local->fif_other_bss++;
|
||||
|
||||
netif_addr_lock_bh(local->mdev);
|
||||
ieee80211_configure_filter(local);
|
||||
netif_addr_unlock_bh(local->mdev);
|
||||
break;
|
||||
case NL80211_IFTYPE_STATION:
|
||||
case NL80211_IFTYPE_ADHOC:
|
||||
sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
||||
/* fall through */
|
||||
default:
|
||||
conf.vif = &sdata->vif;
|
||||
conf.type = sdata->vif.type;
|
||||
conf.mac_addr = dev->dev_addr;
|
||||
res = local->ops->add_interface(local_to_hw(local), &conf);
|
||||
if (res)
|
||||
goto err_stop;
|
||||
|
||||
if (ieee80211_vif_is_mesh(&sdata->vif))
|
||||
ieee80211_start_mesh(sdata);
|
||||
changed |= ieee80211_reset_erp_info(sdata);
|
||||
ieee80211_bss_info_change_notify(sdata, changed);
|
||||
ieee80211_enable_keys(sdata);
|
||||
|
||||
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
|
||||
!(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
|
||||
netif_carrier_off(dev);
|
||||
else
|
||||
netif_carrier_on(dev);
|
||||
}
|
||||
|
||||
if (sdata->vif.type == NL80211_IFTYPE_WDS) {
|
||||
/* Create STA entry for the WDS peer */
|
||||
sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
|
||||
GFP_KERNEL);
|
||||
if (!sta) {
|
||||
res = -ENOMEM;
|
||||
goto err_del_interface;
|
||||
}
|
||||
|
||||
/* no locking required since STA is not live yet */
|
||||
sta->flags |= WLAN_STA_AUTHORIZED;
|
||||
|
||||
res = sta_info_insert(sta);
|
||||
if (res) {
|
||||
/* STA has been freed */
|
||||
goto err_del_interface;
|
||||
}
|
||||
}
|
||||
|
||||
if (local->open_count == 0) {
|
||||
res = dev_open(local->mdev);
|
||||
WARN_ON(res);
|
||||
if (res)
|
||||
goto err_del_interface;
|
||||
tasklet_enable(&local->tx_pending_tasklet);
|
||||
tasklet_enable(&local->tasklet);
|
||||
}
|
||||
|
||||
/*
|
||||
* set_multicast_list will be invoked by the networking core
|
||||
* which will check whether any increments here were done in
|
||||
* error and sync them down to the hardware as filter flags.
|
||||
*/
|
||||
if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
|
||||
atomic_inc(&local->iff_allmultis);
|
||||
|
||||
if (sdata->flags & IEEE80211_SDATA_PROMISC)
|
||||
atomic_inc(&local->iff_promiscs);
|
||||
|
||||
local->open_count++;
|
||||
if (need_hw_reconfig) {
|
||||
ieee80211_hw_config(local);
|
||||
/*
|
||||
* set default queue parameters so drivers don't
|
||||
* need to initialise the hardware if the hardware
|
||||
* doesn't start up with sane defaults
|
||||
*/
|
||||
ieee80211_set_wmm_default(sdata);
|
||||
}
|
||||
|
||||
/*
|
||||
* ieee80211_sta_work is disabled while network interface
|
||||
* is down. Therefore, some configuration changes may not
|
||||
* yet be effective. Trigger execution of ieee80211_sta_work
|
||||
* to fix this.
|
||||
*/
|
||||
if (sdata->vif.type == NL80211_IFTYPE_STATION ||
|
||||
sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
||||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||||
queue_work(local->hw.workqueue, &ifsta->work);
|
||||
}
|
||||
|
||||
netif_tx_start_all_queues(dev);
|
||||
|
||||
return 0;
|
||||
err_del_interface:
|
||||
local->ops->remove_interface(local_to_hw(local), &conf);
|
||||
err_stop:
|
||||
if (!local->open_count && local->ops->stop)
|
||||
local->ops->stop(local_to_hw(local));
|
||||
err_del_bss:
|
||||
sdata->bss = NULL;
|
||||
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
|
||||
list_del(&sdata->u.vlan.list);
|
||||
return res;
|
||||
}
|
||||
|
||||
static int ieee80211_stop(struct net_device *dev)
|
||||
{
|
||||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_if_init_conf conf;
|
||||
struct sta_info *sta;
|
||||
|
||||
/*
|
||||
* Stop TX on this interface first.
|
||||
*/
|
||||
netif_tx_stop_all_queues(dev);
|
||||
|
||||
/*
|
||||
* Now delete all active aggregation sessions.
|
||||
*/
|
||||
rcu_read_lock();
|
||||
|
||||
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
||||
if (sta->sdata == sdata)
|
||||
ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
|
||||
}
|
||||
|
||||
rcu_read_unlock();
|
||||
|
||||
/*
|
||||
* Remove all stations associated with this interface.
|
||||
*
|
||||
* This must be done before calling ops->remove_interface()
|
||||
* because otherwise we can later invoke ops->sta_notify()
|
||||
* whenever the STAs are removed, and that invalidates driver
|
||||
* assumptions about always getting a vif pointer that is valid
|
||||
* (because if we remove a STA after ops->remove_interface()
|
||||
* the driver will have removed the vif info already!)
|
||||
*
|
||||
* We could relax this and only unlink the stations from the
|
||||
* hash table and list but keep them on a per-sdata list that
|
||||
* will be inserted back again when the interface is brought
|
||||
* up again, but I don't currently see a use case for that,
|
||||
* except with WDS which gets a STA entry created when it is
|
||||
* brought up.
|
||||
*/
|
||||
sta_info_flush(local, sdata);
|
||||
|
||||
/*
|
||||
* Don't count this interface for promisc/allmulti while it
|
||||
* is down. dev_mc_unsync() will invoke set_multicast_list
|
||||
* on the master interface which will sync these down to the
|
||||
* hardware as filter flags.
|
||||
*/
|
||||
if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
|
||||
atomic_dec(&local->iff_allmultis);
|
||||
|
||||
if (sdata->flags & IEEE80211_SDATA_PROMISC)
|
||||
atomic_dec(&local->iff_promiscs);
|
||||
|
||||
dev_mc_unsync(local->mdev, dev);
|
||||
|
||||
/* APs need special treatment */
|
||||
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
||||
struct ieee80211_sub_if_data *vlan, *tmp;
|
||||
struct beacon_data *old_beacon = sdata->u.ap.beacon;
|
||||
|
||||
/* remove beacon */
|
||||
rcu_assign_pointer(sdata->u.ap.beacon, NULL);
|
||||
synchronize_rcu();
|
||||
kfree(old_beacon);
|
||||
|
||||
/* down all dependent devices, that is VLANs */
|
||||
list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
|
||||
u.vlan.list)
|
||||
dev_close(vlan->dev);
|
||||
WARN_ON(!list_empty(&sdata->u.ap.vlans));
|
||||
}
|
||||
|
||||
local->open_count--;
|
||||
|
||||
switch (sdata->vif.type) {
|
||||
case NL80211_IFTYPE_AP_VLAN:
|
||||
list_del(&sdata->u.vlan.list);
|
||||
/* no need to tell driver */
|
||||
break;
|
||||
case NL80211_IFTYPE_MONITOR:
|
||||
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_addr_lock_bh(local->mdev);
|
||||
ieee80211_configure_filter(local);
|
||||
netif_addr_unlock_bh(local->mdev);
|
||||
break;
|
||||
case NL80211_IFTYPE_STATION:
|
||||
case NL80211_IFTYPE_ADHOC:
|
||||
sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
|
||||
memset(sdata->u.sta.bssid, 0, ETH_ALEN);
|
||||
del_timer_sync(&sdata->u.sta.timer);
|
||||
/*
|
||||
* If the timer fired while we waited for it, it will have
|
||||
* requeued the work. Now the work will be running again
|
||||
* but will not rearm the timer again because it checks
|
||||
* whether the interface is running, which, at this point,
|
||||
* it no longer is.
|
||||
*/
|
||||
cancel_work_sync(&sdata->u.sta.work);
|
||||
/*
|
||||
* 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);
|
||||
|
||||
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 */
|
||||
case NL80211_IFTYPE_MESH_POINT:
|
||||
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
||||
/* allmulti is always set on mesh ifaces */
|
||||
atomic_dec(&local->iff_allmultis);
|
||||
ieee80211_stop_mesh(sdata);
|
||||
}
|
||||
/* fall through */
|
||||
default:
|
||||
if (local->scan_sdata == sdata) {
|
||||
if (!local->ops->hw_scan)
|
||||
cancel_delayed_work_sync(&local->scan_work);
|
||||
/*
|
||||
* The software scan can no longer run now, so we can
|
||||
* clear out the scan_sdata reference. However, the
|
||||
* hardware scan may still be running. The complete
|
||||
* function must be prepared to handle a NULL value.
|
||||
*/
|
||||
local->scan_sdata = NULL;
|
||||
/*
|
||||
* The memory barrier guarantees that another CPU
|
||||
* that is hardware-scanning will now see the fact
|
||||
* that this interface is gone.
|
||||
*/
|
||||
smp_mb();
|
||||
/*
|
||||
* 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_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,
|
||||
};
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
/* everything else */
|
||||
|
||||
int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user