/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/if_arp.h> #include <linux/netdevice.h> #include <linux/rtnetlink.h> #include <net/mac80211.h> #include "ieee80211_i.h" #include "sta_info.h" #include "debugfs_netdev.h" void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) { int i; /* Default values for sub-interface parameters */ sdata->drop_unencrypted = 0; sdata->eapol = 1; for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) skb_queue_head_init(&sdata->fragments[i].skb_list); } static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) { int i; for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { __skb_queue_purge(&sdata->fragments[i].skb_list); } } /* Must be called with rtnl lock held. */ int ieee80211_if_add(struct net_device *dev, const char *name, struct net_device **new_dev, int type) { struct net_device *ndev; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_sub_if_data *sdata = NULL; int ret; ASSERT_RTNL(); ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), name, ieee80211_if_setup); if (!ndev) return -ENOMEM; ret = dev_alloc_name(ndev, ndev->name); if (ret < 0) goto fail; memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); ndev->base_addr = dev->base_addr; ndev->irq = dev->irq; ndev->mem_start = dev->mem_start; ndev->mem_end = dev->mem_end; SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); sdata = IEEE80211_DEV_TO_SUB_IF(ndev); ndev->ieee80211_ptr = &sdata->wdev; sdata->wdev.wiphy = local->hw.wiphy; sdata->type = IEEE80211_IF_TYPE_AP; sdata->dev = ndev; sdata->local = local; ieee80211_if_sdata_init(sdata); ret = register_netdevice(ndev); if (ret) goto fail; ieee80211_debugfs_add_netdev(sdata); ieee80211_if_set_type(ndev, type); write_lock_bh(&local->sub_if_lock); if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { write_unlock_bh(&local->sub_if_lock); __ieee80211_if_del(local, sdata); return -ENODEV; } list_add(&sdata->list, &local->sub_if_list); if (new_dev) *new_dev = ndev; write_unlock_bh(&local->sub_if_lock); ieee80211_update_default_wep_only(local); return 0; fail: free_netdev(ndev); return ret; } int ieee80211_if_add_mgmt(struct ieee80211_local *local) { struct net_device *ndev; struct ieee80211_sub_if_data *nsdata; int ret; ASSERT_RTNL(); ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d", ieee80211_if_mgmt_setup); if (!ndev) return -ENOMEM; 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)); nsdata = IEEE80211_DEV_TO_SUB_IF(ndev); ndev->ieee80211_ptr = &nsdata->wdev; nsdata->wdev.wiphy = local->hw.wiphy; nsdata->type = IEEE80211_IF_TYPE_MGMT; nsdata->dev = ndev; nsdata->local = local; ieee80211_if_sdata_init(nsdata); ret = register_netdevice(ndev); if (ret) goto fail; ieee80211_debugfs_add_netdev(nsdata); if (local->open_count > 0) dev_open(ndev); local->apdev = ndev; return 0; fail: free_netdev(ndev); return ret; } void ieee80211_if_del_mgmt(struct ieee80211_local *local) { struct net_device *apdev; ASSERT_RTNL(); apdev = local->apdev; ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev)); local->apdev = NULL; unregister_netdevice(apdev); } void ieee80211_if_set_type(struct net_device *dev, int type) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); int oldtype = sdata->type; sdata->type = type; switch (type) { case IEEE80211_IF_TYPE_WDS: sdata->bss = NULL; break; case IEEE80211_IF_TYPE_VLAN: break; case IEEE80211_IF_TYPE_AP: sdata->u.ap.dtim_period = 2; sdata->u.ap.force_unicast_rateidx = -1; sdata->u.ap.max_ratectrl_rateidx = -1; skb_queue_head_init(&sdata->u.ap.ps_bc_buf); sdata->bss = &sdata->u.ap; break; case IEEE80211_IF_TYPE_STA: case IEEE80211_IF_TYPE_IBSS: { struct ieee80211_sub_if_data *msdata; struct ieee80211_if_sta *ifsta; ifsta = &sdata->u.sta; INIT_WORK(&ifsta->work, ieee80211_sta_work); setup_timer(&ifsta->timer, ieee80211_sta_timer, (unsigned long) sdata); skb_queue_head_init(&ifsta->skb_queue); ifsta->capab = WLAN_CAPABILITY_ESS; ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | IEEE80211_AUTH_ALG_SHARED_KEY; ifsta->create_ibss = 1; ifsta->wmm_enabled = 1; ifsta->auto_channel_sel = 1; ifsta->auto_bssid_sel = 1; msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); sdata->bss = &msdata->u.ap; break; } case IEEE80211_IF_TYPE_MNTR: dev->type = ARPHRD_IEEE80211_RADIOTAP; break; default: printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", dev->name, __FUNCTION__, type); } ieee80211_debugfs_change_if_type(sdata, oldtype); ieee80211_update_default_wep_only(local); } /* Must be called with rtnl lock held. */ void ieee80211_if_reinit(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); struct sta_info *sta; int i; ASSERT_RTNL(); ieee80211_if_sdata_deinit(sdata); for (i = 0; i < NUM_DEFAULT_KEYS; i++) { if (!sdata->keys[i]) continue; #if 0 /* The interface is down at the moment, so there is not * really much point in disabling the keys at this point. */ memset(addr, 0xff, ETH_ALEN); if (local->ops->set_key) local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr, local->keys[i], 0); #endif ieee80211_key_free(sdata->keys[i]); sdata->keys[i] = NULL; } switch (sdata->type) { case IEEE80211_IF_TYPE_AP: { /* Remove all virtual interfaces that use this BSS * as their sdata->bss */ struct ieee80211_sub_if_data *tsdata, *n; LIST_HEAD(tmp_list); write_lock_bh(&local->sub_if_lock); list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) { if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { printk(KERN_DEBUG "%s: removing virtual " "interface %s because its BSS interface" " is being removed\n", sdata->dev->name, tsdata->dev->name); list_move_tail(&tsdata->list, &tmp_list); } } write_unlock_bh(&local->sub_if_lock); list_for_each_entry_safe(tsdata, n, &tmp_list, list) __ieee80211_if_del(local, tsdata); kfree(sdata->u.ap.beacon_head); kfree(sdata->u.ap.beacon_tail); kfree(sdata->u.ap.generic_elem); if (dev != local->mdev) { struct sk_buff *skb; while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { local->total_ps_buffered--; dev_kfree_skb(skb); } } break; } case IEEE80211_IF_TYPE_WDS: sta = sta_info_get(local, sdata->u.wds.remote_addr); if (sta) { sta_info_put(sta); sta_info_free(sta, 0); } else { #ifdef CONFIG_MAC80211_VERBOSE_DEBUG printk(KERN_DEBUG "%s: Someone had deleted my STA " "entry for the WDS link\n", dev->name); #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ } break; case IEEE80211_IF_TYPE_STA: case IEEE80211_IF_TYPE_IBSS: kfree(sdata->u.sta.extra_ie); sdata->u.sta.extra_ie = NULL; kfree(sdata->u.sta.assocreq_ies); sdata->u.sta.assocreq_ies = NULL; kfree(sdata->u.sta.assocresp_ies); sdata->u.sta.assocresp_ies = NULL; if (sdata->u.sta.probe_resp) { dev_kfree_skb(sdata->u.sta.probe_resp); sdata->u.sta.probe_resp = NULL; } break; case IEEE80211_IF_TYPE_MNTR: dev->type = ARPHRD_ETHER; break; } /* remove all STAs that are bound to this virtual interface */ sta_info_flush(local, dev); memset(&sdata->u, 0, sizeof(sdata->u)); ieee80211_if_sdata_init(sdata); } /* Must be called with rtnl lock held. */ void __ieee80211_if_del(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { struct net_device *dev = sdata->dev; ieee80211_debugfs_remove_netdev(sdata); unregister_netdevice(dev); /* Except master interface, the net_device will be freed by * net_device->destructor (i. e. ieee80211_if_free). */ } /* Must be called with rtnl lock held. */ int ieee80211_if_remove(struct net_device *dev, const char *name, int id) { struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_sub_if_data *sdata, *n; ASSERT_RTNL(); write_lock_bh(&local->sub_if_lock); list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) { if ((sdata->type == id || id == -1) && strcmp(name, sdata->dev->name) == 0 && sdata->dev != local->mdev) { list_del(&sdata->list); write_unlock_bh(&local->sub_if_lock); __ieee80211_if_del(local, sdata); ieee80211_update_default_wep_only(local); return 0; } } write_unlock_bh(&local->sub_if_lock); return -ENODEV; } void ieee80211_if_free(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); /* local->apdev must be NULL when freeing management interface */ BUG_ON(dev == local->apdev); ieee80211_if_sdata_deinit(sdata); free_netdev(dev); }