1 files changed, 314 insertions, 0 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
new file mode 100644
index 000000000000..80954a512185
--- /dev/null
+++ b/net/mac80211/iface.c
@@ -0,0 +1,314 @@
+/*
+ * 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);
+}