2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/if_arp.h>
13 #include <linux/netdevice.h>
14 #include <linux/rtnetlink.h>
15 #include <net/mac80211.h>
16 #include "ieee80211_i.h"
18 #include "debugfs_netdev.h"
22 * Called when the netdev is removed or, by the code below, before
23 * the interface type changes.
25 static void ieee80211_teardown_sdata(struct net_device
*dev
)
27 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
28 struct ieee80211_local
*local
= sdata
->local
;
29 struct beacon_data
*beacon
;
35 ieee80211_free_keys(sdata
);
37 ieee80211_debugfs_remove_netdev(sdata
);
39 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
40 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
41 sdata
->fragment_next
= 0;
43 switch (sdata
->vif
.type
) {
44 case IEEE80211_IF_TYPE_AP
:
45 beacon
= sdata
->u
.ap
.beacon
;
46 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
50 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
51 local
->total_ps_buffered
--;
56 case IEEE80211_IF_TYPE_MESH_POINT
:
57 if (ieee80211_vif_is_mesh(&sdata
->vif
))
60 case IEEE80211_IF_TYPE_STA
:
61 case IEEE80211_IF_TYPE_IBSS
:
62 kfree(sdata
->u
.sta
.extra_ie
);
63 kfree(sdata
->u
.sta
.assocreq_ies
);
64 kfree(sdata
->u
.sta
.assocresp_ies
);
65 kfree_skb(sdata
->u
.sta
.probe_resp
);
67 case IEEE80211_IF_TYPE_WDS
:
68 case IEEE80211_IF_TYPE_VLAN
:
69 case IEEE80211_IF_TYPE_MNTR
:
71 case IEEE80211_IF_TYPE_INVALID
:
76 flushed
= sta_info_flush(local
, sdata
);
81 * Helper function to initialise an interface to a specific type.
83 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
84 enum ieee80211_if_types type
)
86 struct ieee80211_if_sta
*ifsta
;
88 /* clear type-dependent union */
89 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
91 /* and set some type-dependent values */
92 sdata
->vif
.type
= type
;
94 /* only monitor differs */
95 sdata
->dev
->type
= ARPHRD_ETHER
;
98 case IEEE80211_IF_TYPE_AP
:
99 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
100 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
102 case IEEE80211_IF_TYPE_STA
:
103 case IEEE80211_IF_TYPE_IBSS
:
104 ifsta
= &sdata
->u
.sta
;
105 INIT_WORK(&ifsta
->work
, ieee80211_sta_work
);
106 setup_timer(&ifsta
->timer
, ieee80211_sta_timer
,
107 (unsigned long) sdata
);
108 skb_queue_head_init(&ifsta
->skb_queue
);
110 ifsta
->capab
= WLAN_CAPABILITY_ESS
;
111 ifsta
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
112 IEEE80211_AUTH_ALG_SHARED_KEY
;
113 ifsta
->flags
|= IEEE80211_STA_CREATE_IBSS
|
114 IEEE80211_STA_AUTO_BSSID_SEL
|
115 IEEE80211_STA_AUTO_CHANNEL_SEL
;
116 if (ieee80211_num_regular_queues(&sdata
->local
->hw
) >= 4)
117 ifsta
->flags
|= IEEE80211_STA_WMM_ENABLED
;
119 case IEEE80211_IF_TYPE_MESH_POINT
:
120 if (ieee80211_vif_is_mesh(&sdata
->vif
))
121 ieee80211_mesh_init_sdata(sdata
);
123 case IEEE80211_IF_TYPE_MNTR
:
124 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
125 sdata
->dev
->hard_start_xmit
= ieee80211_monitor_start_xmit
;
126 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
127 MONITOR_FLAG_OTHER_BSS
;
129 case IEEE80211_IF_TYPE_WDS
:
130 case IEEE80211_IF_TYPE_VLAN
:
132 case IEEE80211_IF_TYPE_INVALID
:
137 ieee80211_debugfs_add_netdev(sdata
);
140 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
141 enum ieee80211_if_types type
)
145 if (type
== sdata
->vif
.type
)
149 * We could, here, on changes between IBSS/STA/MESH modes,
150 * invoke an MLME function instead that disassociates etc.
151 * and goes into the requested mode.
154 if (netif_running(sdata
->dev
))
157 /* Purge and reset type-dependent state. */
158 ieee80211_teardown_sdata(sdata
->dev
);
159 ieee80211_setup_sdata(sdata
, type
);
161 /* reset some values that shouldn't be kept across type changes */
162 sdata
->basic_rates
= 0;
163 sdata
->drop_unencrypted
= 0;
168 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
169 struct net_device
**new_dev
, enum ieee80211_if_types type
,
170 struct vif_params
*params
)
172 struct net_device
*ndev
;
173 struct ieee80211_sub_if_data
*sdata
= NULL
;
178 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
179 name
, ieee80211_if_setup
);
183 ndev
->needed_headroom
= local
->tx_headroom
+
184 4*6 /* four MAC addresses */
185 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
187 + 8 /* rfc1042/bridge tunnel */
188 - ETH_HLEN
/* ethernet hard_header_len */
189 + IEEE80211_ENCRYPT_HEADROOM
;
190 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
192 ret
= dev_alloc_name(ndev
, ndev
->name
);
196 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
197 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
199 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
200 sdata
= netdev_priv(ndev
);
201 ndev
->ieee80211_ptr
= &sdata
->wdev
;
203 /* initialise type-independent data */
204 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
205 sdata
->local
= local
;
208 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
209 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
211 INIT_LIST_HEAD(&sdata
->key_list
);
213 sdata
->force_unicast_rateidx
= -1;
214 sdata
->max_ratectrl_rateidx
= -1;
216 /* setup type-dependent data */
217 ieee80211_setup_sdata(sdata
, type
);
219 ret
= register_netdevice(ndev
);
223 ndev
->uninit
= ieee80211_teardown_sdata
;
225 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
226 params
&& params
->mesh_id_len
)
227 ieee80211_sdata_set_mesh_id(sdata
,
231 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
243 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
247 list_del_rcu(&sdata
->list
);
249 unregister_netdevice(sdata
->dev
);
253 * Remove all interfaces, may only be called at hardware unregistration
254 * time because it doesn't do RCU-safe list removals.
256 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
258 struct ieee80211_sub_if_data
*sdata
, *tmp
;
262 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
263 list_del(&sdata
->list
);
264 unregister_netdevice(sdata
->dev
);