2007-05-05 14:45:53 -04:00
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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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2008-07-09 08:40:35 -04:00
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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2007-05-05 14:45:53 -04:00
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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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2007-05-05 14:46:38 -04:00
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#include "debugfs_netdev.h"
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2008-02-23 09:17:11 -05:00
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#include "mesh.h"
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2007-05-05 14:45:53 -04:00
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2008-07-09 08:40:35 -04:00
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/*
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* Called when the netdev is removed or, by the code below, before
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* the interface type changes.
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*/
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static void ieee80211_teardown_sdata(struct net_device *dev)
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2007-05-05 14:45:53 -04:00
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{
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2008-07-09 08:40:35 -04:00
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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 beacon_data *beacon;
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struct sk_buff *skb;
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int flushed;
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2007-05-05 14:45:53 -04:00
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int i;
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2008-07-09 08:40:35 -04:00
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ieee80211_debugfs_remove_netdev(sdata);
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/* free extra data */
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ieee80211_free_keys(sdata);
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2007-05-05 14:45:53 -04:00
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for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
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2008-07-09 08:40:35 -04:00
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__skb_queue_purge(&sdata->fragments[i].skb_list);
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sdata->fragment_next = 0;
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2007-08-28 17:01:55 -04:00
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2008-07-09 08:40:35 -04:00
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switch (sdata->vif.type) {
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case IEEE80211_IF_TYPE_AP:
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beacon = sdata->u.ap.beacon;
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rcu_assign_pointer(sdata->u.ap.beacon, NULL);
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synchronize_rcu();
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kfree(beacon);
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mac80211: make master netdev handling sane
Currently, almost every interface type has a 'bss' pointer
pointing to BSS information. This BSS information, however,
is for a _local_ BSS, not for the BSS we joined, so having
it on a STA mode interface makes little sense, but now they
have it pointing to the master device, which is an AP mode
virtual interface. However, except for some bitrate control
data, this pointer is only used in AP/VLAN modes (for power
saving stations.)
Overall, it is not necessary to even have the master netdev
be a valid virtual interface, and it doesn't have to be on
the list of interfaces either.
This patch changes the master netdev to be special, it now
- no longer is on the list of virtual interfaces, which
lets me remove a lot of tests for that
- no longer has sub_if_data attached, since that isn't used
Additionally, this patch changes some vlan/ap mode handling
that is related to these 'bss' pointers described above (but
in the VLAN case they actually make sense because there they
point to the AP they belong to); it also adds some debugging
code to IEEE80211_DEV_TO_SUB_IF to validate it is not called
on the master netdev any more.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-07-09 08:40:34 -04:00
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2008-07-09 08:40:35 -04:00
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while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
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local->total_ps_buffered--;
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dev_kfree_skb(skb);
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}
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break;
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case IEEE80211_IF_TYPE_MESH_POINT:
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/* Allow compiler to elide mesh_rmc_free call. */
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if (ieee80211_vif_is_mesh(&sdata->vif))
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mesh_rmc_free(dev);
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/* fall through */
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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kfree(sdata->u.sta.extra_ie);
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kfree(sdata->u.sta.assocreq_ies);
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kfree(sdata->u.sta.assocresp_ies);
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kfree_skb(sdata->u.sta.probe_resp);
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break;
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case IEEE80211_IF_TYPE_WDS:
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case IEEE80211_IF_TYPE_VLAN:
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case IEEE80211_IF_TYPE_MNTR:
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break;
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case IEEE80211_IF_TYPE_INVALID:
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BUG();
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break;
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}
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flushed = sta_info_flush(local, sdata);
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WARN_ON(flushed);
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2007-05-05 14:45:53 -04:00
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}
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2008-07-09 08:40:35 -04:00
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/*
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* Helper function to initialise an interface to a specific type.
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*/
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static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
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enum ieee80211_if_types type)
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2007-05-05 14:45:53 -04:00
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{
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2008-07-09 08:40:35 -04:00
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struct ieee80211_if_sta *ifsta;
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2007-05-05 14:45:53 -04:00
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2008-07-09 08:40:35 -04:00
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/* clear type-dependent union */
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memset(&sdata->u, 0, sizeof(sdata->u));
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/* and set some type-dependent values */
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sdata->vif.type = type;
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/* only monitor differs */
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sdata->dev->type = ARPHRD_ETHER;
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switch (type) {
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case IEEE80211_IF_TYPE_AP:
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skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
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INIT_LIST_HEAD(&sdata->u.ap.vlans);
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break;
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case IEEE80211_IF_TYPE_MESH_POINT:
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case IEEE80211_IF_TYPE_STA:
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case IEEE80211_IF_TYPE_IBSS:
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ifsta = &sdata->u.sta;
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INIT_WORK(&ifsta->work, ieee80211_sta_work);
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setup_timer(&ifsta->timer, ieee80211_sta_timer,
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(unsigned long) sdata);
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skb_queue_head_init(&ifsta->skb_queue);
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ifsta->capab = WLAN_CAPABILITY_ESS;
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ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
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IEEE80211_AUTH_ALG_SHARED_KEY;
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ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
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IEEE80211_STA_AUTO_BSSID_SEL |
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IEEE80211_STA_AUTO_CHANNEL_SEL;
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if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
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ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
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if (ieee80211_vif_is_mesh(&sdata->vif))
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ieee80211_mesh_init_sdata(sdata);
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break;
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case IEEE80211_IF_TYPE_MNTR:
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sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
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sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit;
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sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
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MONITOR_FLAG_OTHER_BSS;
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break;
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case IEEE80211_IF_TYPE_WDS:
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case IEEE80211_IF_TYPE_VLAN:
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break;
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case IEEE80211_IF_TYPE_INVALID:
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BUG();
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break;
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}
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ieee80211_debugfs_add_netdev(sdata);
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}
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2008-07-09 08:40:36 -04:00
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int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
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enum ieee80211_if_types type)
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2008-07-09 08:40:35 -04:00
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{
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2008-07-09 08:40:36 -04:00
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ASSERT_RTNL();
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if (type == sdata->vif.type)
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return 0;
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/*
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* We could, here, on changes between IBSS/STA/MESH modes,
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* invoke an MLME function instead that disassociates etc.
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* and goes into the requested mode.
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*/
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if (netif_running(sdata->dev))
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return -EBUSY;
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2008-07-09 08:40:35 -04:00
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/* Purge and reset type-dependent state. */
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ieee80211_teardown_sdata(sdata->dev);
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ieee80211_setup_sdata(sdata, type);
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/* reset some values that shouldn't be kept across type changes */
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sdata->basic_rates = 0;
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sdata->drop_unencrypted = 0;
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2008-07-09 08:40:36 -04:00
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return 0;
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2007-05-05 14:45:53 -04:00
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}
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mac80211: make master netdev handling sane
Currently, almost every interface type has a 'bss' pointer
pointing to BSS information. This BSS information, however,
is for a _local_ BSS, not for the BSS we joined, so having
it on a STA mode interface makes little sense, but now they
have it pointing to the master device, which is an AP mode
virtual interface. However, except for some bitrate control
data, this pointer is only used in AP/VLAN modes (for power
saving stations.)
Overall, it is not necessary to even have the master netdev
be a valid virtual interface, and it doesn't have to be on
the list of interfaces either.
This patch changes the master netdev to be special, it now
- no longer is on the list of virtual interfaces, which
lets me remove a lot of tests for that
- no longer has sub_if_data attached, since that isn't used
Additionally, this patch changes some vlan/ap mode handling
that is related to these 'bss' pointers described above (but
in the VLAN case they actually make sense because there they
point to the AP they belong to); it also adds some debugging
code to IEEE80211_DEV_TO_SUB_IF to validate it is not called
on the master netdev any more.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-07-09 08:40:34 -04:00
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int ieee80211_if_add(struct ieee80211_local *local, const char *name,
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2008-07-09 08:40:35 -04:00
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struct net_device **new_dev, enum ieee80211_if_types type,
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2008-02-23 09:17:11 -05:00
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struct vif_params *params)
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2007-05-05 14:45:53 -04:00
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{
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struct net_device *ndev;
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struct ieee80211_sub_if_data *sdata = NULL;
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2008-07-09 08:40:35 -04:00
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int ret, i;
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2007-05-05 14:45:53 -04:00
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ASSERT_RTNL();
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2008-07-09 08:40:35 -04:00
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2007-12-18 19:31:26 -05:00
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ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
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2007-05-05 14:45:53 -04:00
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name, ieee80211_if_setup);
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if (!ndev)
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return -ENOMEM;
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2008-05-12 23:51:44 -04:00
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ndev->needed_headroom = local->tx_headroom +
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4*6 /* four MAC addresses */
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+ 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
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+ 6 /* mesh */
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+ 8 /* rfc1042/bridge tunnel */
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- ETH_HLEN /* ethernet hard_header_len */
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+ IEEE80211_ENCRYPT_HEADROOM;
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ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
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2007-05-05 14:45:53 -04:00
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ret = dev_alloc_name(ndev, ndev->name);
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if (ret < 0)
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goto fail;
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memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
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SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
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mac80211: make master netdev handling sane
Currently, almost every interface type has a 'bss' pointer
pointing to BSS information. This BSS information, however,
is for a _local_ BSS, not for the BSS we joined, so having
it on a STA mode interface makes little sense, but now they
have it pointing to the master device, which is an AP mode
virtual interface. However, except for some bitrate control
data, this pointer is only used in AP/VLAN modes (for power
saving stations.)
Overall, it is not necessary to even have the master netdev
be a valid virtual interface, and it doesn't have to be on
the list of interfaces either.
This patch changes the master netdev to be special, it now
- no longer is on the list of virtual interfaces, which
lets me remove a lot of tests for that
- no longer has sub_if_data attached, since that isn't used
Additionally, this patch changes some vlan/ap mode handling
that is related to these 'bss' pointers described above (but
in the VLAN case they actually make sense because there they
point to the AP they belong to); it also adds some debugging
code to IEEE80211_DEV_TO_SUB_IF to validate it is not called
on the master netdev any more.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-07-09 08:40:34 -04:00
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/* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
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sdata = netdev_priv(ndev);
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2007-05-05 14:45:53 -04:00
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ndev->ieee80211_ptr = &sdata->wdev;
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2008-07-09 08:40:35 -04:00
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/* initialise type-independent data */
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2007-05-05 14:45:53 -04:00
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sdata->wdev.wiphy = local->hw.wiphy;
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sdata->local = local;
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2008-07-09 08:40:35 -04:00
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sdata->dev = ndev;
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for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
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skb_queue_head_init(&sdata->fragments[i].skb_list);
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INIT_LIST_HEAD(&sdata->key_list);
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sdata->force_unicast_rateidx = -1;
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sdata->max_ratectrl_rateidx = -1;
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/* setup type-dependent data */
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ieee80211_setup_sdata(sdata, type);
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2007-05-05 14:45:53 -04:00
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ret = register_netdevice(ndev);
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if (ret)
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goto fail;
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2008-07-09 08:40:35 -04:00
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ndev->uninit = ieee80211_teardown_sdata;
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2007-05-05 14:45:53 -04:00
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2008-02-23 09:17:19 -05:00
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if (ieee80211_vif_is_mesh(&sdata->vif) &&
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params && params->mesh_id_len)
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ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
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params->mesh_id_len,
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params->mesh_id);
|
2008-02-23 09:17:11 -05:00
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2007-09-18 17:29:21 -04:00
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list_add_tail_rcu(&sdata->list, &local->interfaces);
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2007-05-05 14:45:53 -04:00
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if (new_dev)
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*new_dev = ndev;
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return 0;
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2008-07-09 08:40:35 -04:00
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fail:
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2007-05-05 14:45:53 -04:00
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free_netdev(ndev);
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return ret;
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}
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2008-07-09 08:40:35 -04:00
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void ieee80211_if_remove(struct net_device *dev)
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2007-05-05 14:45:53 -04:00
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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ASSERT_RTNL();
|
2007-08-28 17:01:55 -04:00
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2008-07-09 08:40:35 -04:00
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list_del_rcu(&sdata->list);
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synchronize_rcu();
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2007-05-05 14:45:53 -04:00
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unregister_netdevice(dev);
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}
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2008-07-09 08:40:35 -04:00
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/*
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* Remove all interfaces, may only be called at hardware unregistration
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* time because it doesn't do RCU-safe list removals.
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*/
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void ieee80211_remove_interfaces(struct ieee80211_local *local)
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2007-05-05 14:45:53 -04:00
|
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{
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2008-07-09 08:40:35 -04:00
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struct ieee80211_sub_if_data *sdata, *tmp;
|
2007-05-05 14:45:53 -04:00
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ASSERT_RTNL();
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2008-07-09 08:40:35 -04:00
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list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
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list_del(&sdata->list);
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unregister_netdevice(sdata->dev);
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2007-05-05 14:45:53 -04:00
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}
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}
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