/* * 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" #include "mesh.h" void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) { int i; /* Default values for sub-interface parameters */ sdata->drop_unencrypted = 0; for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) skb_queue_head_init(&sdata->fragments[i].skb_list); INIT_LIST_HEAD(&sdata->key_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 vif_params *params) { 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(*sdata) + local->hw.vif_data_size, 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->vif.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); if (ieee80211_vif_is_mesh(&sdata->vif) && params && params->mesh_id_len) ieee80211_if_sta_set_mesh_id(&sdata->u.sta, params->mesh_id_len, params->mesh_id); /* we're under RTNL so all this is fine */ if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { __ieee80211_if_del(local, sdata); return -ENODEV; } 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_set_type(struct net_device *dev, int type) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); int oldtype = sdata->vif.type; /* * We need to call this function on the master interface * which already has a hard_start_xmit routine assigned * which must not be changed. */ if (dev != sdata->local->mdev) dev->hard_start_xmit = ieee80211_subif_start_xmit; /* * Called even when register_netdevice fails, it would * oops if assigned before initialising the rest. */ dev->uninit = ieee80211_if_reinit; /* most have no BSS pointer */ sdata->bss = NULL; sdata->vif.type = type; sdata->basic_rates = 0; switch (type) { case IEEE80211_IF_TYPE_WDS: /* nothing special */ break; case IEEE80211_IF_TYPE_VLAN: sdata->u.vlan.ap = NULL; break; case IEEE80211_IF_TYPE_AP: 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; INIT_LIST_HEAD(&sdata->u.ap.vlans); break; case IEEE80211_IF_TYPE_MESH_POINT: 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->flags |= IEEE80211_STA_CREATE_IBSS | IEEE80211_STA_WMM_ENABLED | IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL; msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); sdata->bss = &msdata->u.ap; if (ieee80211_vif_is_mesh(&sdata->vif)) ieee80211_mesh_init_sdata(sdata); break; } case IEEE80211_IF_TYPE_MNTR: dev->type = ARPHRD_IEEE80211_RADIOTAP; dev->hard_start_xmit = ieee80211_monitor_start_xmit; sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | MONITOR_FLAG_OTHER_BSS; break; default: printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", dev->name, __func__, type); } ieee80211_debugfs_change_if_type(sdata, oldtype); } /* 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 sk_buff *skb; int flushed; ASSERT_RTNL(); ieee80211_free_keys(sdata); ieee80211_if_sdata_deinit(sdata); /* Need to handle mesh specially to allow eliding the function call */ if (ieee80211_vif_is_mesh(&sdata->vif)) mesh_rmc_free(dev); switch (sdata->vif.type) { case IEEE80211_IF_TYPE_INVALID: /* cannot happen */ WARN_ON(1); break; case IEEE80211_IF_TYPE_AP: { /* Remove all virtual interfaces that use this BSS * as their sdata->bss */ struct ieee80211_sub_if_data *tsdata, *n; struct beacon_data *beacon; list_for_each_entry_safe(tsdata, n, &local->interfaces, 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_del_rcu(&tsdata->list); /* * We have lots of time and can afford * to sync for each interface */ synchronize_rcu(); __ieee80211_if_del(local, tsdata); } } 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 IEEE80211_IF_TYPE_WDS: /* nothing to do */ break; case IEEE80211_IF_TYPE_MESH_POINT: 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; case IEEE80211_IF_TYPE_VLAN: sdata->u.vlan.ap = NULL; break; } flushed = sta_info_flush(local, sdata); WARN_ON(flushed); 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(); list_for_each_entry_safe(sdata, n, &local->interfaces, list) { if ((sdata->vif.type == id || id == -1) && strcmp(name, sdata->dev->name) == 0 && sdata->dev != local->mdev) { list_del_rcu(&sdata->list); synchronize_rcu(); __ieee80211_if_del(local, sdata); return 0; } } return -ENODEV; } void ieee80211_if_free(struct net_device *dev) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); ieee80211_if_sdata_deinit(sdata); free_netdev(dev); }