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 /* clear type-dependent union */
87 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
89 /* and set some type-dependent values */
90 sdata
->vif
.type
= type
;
92 /* only monitor differs */
93 sdata
->dev
->type
= ARPHRD_ETHER
;
96 case IEEE80211_IF_TYPE_AP
:
97 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
98 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
100 case IEEE80211_IF_TYPE_STA
:
101 case IEEE80211_IF_TYPE_IBSS
:
102 ieee80211_sta_setup_sdata(sdata
);
104 case IEEE80211_IF_TYPE_MESH_POINT
:
105 if (ieee80211_vif_is_mesh(&sdata
->vif
))
106 ieee80211_mesh_init_sdata(sdata
);
108 case IEEE80211_IF_TYPE_MNTR
:
109 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
110 sdata
->dev
->hard_start_xmit
= ieee80211_monitor_start_xmit
;
111 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
112 MONITOR_FLAG_OTHER_BSS
;
114 case IEEE80211_IF_TYPE_WDS
:
115 case IEEE80211_IF_TYPE_VLAN
:
117 case IEEE80211_IF_TYPE_INVALID
:
122 ieee80211_debugfs_add_netdev(sdata
);
125 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
126 enum ieee80211_if_types type
)
130 if (type
== sdata
->vif
.type
)
134 * We could, here, on changes between IBSS/STA/MESH modes,
135 * invoke an MLME function instead that disassociates etc.
136 * and goes into the requested mode.
139 if (netif_running(sdata
->dev
))
142 /* Purge and reset type-dependent state. */
143 ieee80211_teardown_sdata(sdata
->dev
);
144 ieee80211_setup_sdata(sdata
, type
);
146 /* reset some values that shouldn't be kept across type changes */
147 sdata
->basic_rates
= 0;
148 sdata
->drop_unencrypted
= 0;
153 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
154 struct net_device
**new_dev
, enum ieee80211_if_types type
,
155 struct vif_params
*params
)
157 struct net_device
*ndev
;
158 struct ieee80211_sub_if_data
*sdata
= NULL
;
163 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
164 name
, ieee80211_if_setup
);
168 ndev
->needed_headroom
= local
->tx_headroom
+
169 4*6 /* four MAC addresses */
170 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
172 + 8 /* rfc1042/bridge tunnel */
173 - ETH_HLEN
/* ethernet hard_header_len */
174 + IEEE80211_ENCRYPT_HEADROOM
;
175 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
177 ret
= dev_alloc_name(ndev
, ndev
->name
);
181 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
182 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
184 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
185 sdata
= netdev_priv(ndev
);
186 ndev
->ieee80211_ptr
= &sdata
->wdev
;
188 /* initialise type-independent data */
189 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
190 sdata
->local
= local
;
193 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
194 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
196 INIT_LIST_HEAD(&sdata
->key_list
);
198 sdata
->force_unicast_rateidx
= -1;
199 sdata
->max_ratectrl_rateidx
= -1;
201 /* setup type-dependent data */
202 ieee80211_setup_sdata(sdata
, type
);
204 ret
= register_netdevice(ndev
);
208 ndev
->uninit
= ieee80211_teardown_sdata
;
210 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
211 params
&& params
->mesh_id_len
)
212 ieee80211_sdata_set_mesh_id(sdata
,
216 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
228 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
232 list_del_rcu(&sdata
->list
);
234 unregister_netdevice(sdata
->dev
);
238 * Remove all interfaces, may only be called at hardware unregistration
239 * time because it doesn't do RCU-safe list removals.
241 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
243 struct ieee80211_sub_if_data
*sdata
, *tmp
;
247 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
248 list_del(&sdata
->list
);
249 unregister_netdevice(sdata
->dev
);