mac80211: support adding/removing keys via cfg80211
[linux-2.6.git] / net / mac80211 / cfg.c
1 /*
2  * mac80211 configuration hooks for cfg80211
3  *
4  * Copyright 2006       Johannes Berg <johannes@sipsolutions.net>
5  *
6  * This file is GPLv2 as found in COPYING.
7  */
8
9 #include <linux/ieee80211.h>
10 #include <linux/nl80211.h>
11 #include <linux/rtnetlink.h>
12 #include <net/net_namespace.h>
13 #include <net/cfg80211.h>
14 #include "ieee80211_i.h"
15 #include "cfg.h"
16
17 static enum ieee80211_if_types
18 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
19 {
20         switch (type) {
21         case NL80211_IFTYPE_UNSPECIFIED:
22                 return IEEE80211_IF_TYPE_STA;
23         case NL80211_IFTYPE_ADHOC:
24                 return IEEE80211_IF_TYPE_IBSS;
25         case NL80211_IFTYPE_STATION:
26                 return IEEE80211_IF_TYPE_STA;
27         case NL80211_IFTYPE_MONITOR:
28                 return IEEE80211_IF_TYPE_MNTR;
29         default:
30                 return IEEE80211_IF_TYPE_INVALID;
31         }
32 }
33
34 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
35                                enum nl80211_iftype type)
36 {
37         struct ieee80211_local *local = wiphy_priv(wiphy);
38         enum ieee80211_if_types itype;
39
40         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
41                 return -ENODEV;
42
43         itype = nl80211_type_to_mac80211_type(type);
44         if (itype == IEEE80211_IF_TYPE_INVALID)
45                 return -EINVAL;
46
47         return ieee80211_if_add(local->mdev, name, NULL, itype);
48 }
49
50 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
51 {
52         struct ieee80211_local *local = wiphy_priv(wiphy);
53         struct net_device *dev;
54         char *name;
55
56         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
57                 return -ENODEV;
58
59         /* we're under RTNL */
60         dev = __dev_get_by_index(&init_net, ifindex);
61         if (!dev)
62                 return 0;
63
64         name = dev->name;
65
66         return ieee80211_if_remove(local->mdev, name, -1);
67 }
68
69 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
70                                   enum nl80211_iftype type)
71 {
72         struct ieee80211_local *local = wiphy_priv(wiphy);
73         struct net_device *dev;
74         enum ieee80211_if_types itype;
75         struct ieee80211_sub_if_data *sdata;
76
77         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
78                 return -ENODEV;
79
80         /* we're under RTNL */
81         dev = __dev_get_by_index(&init_net, ifindex);
82         if (!dev)
83                 return -ENODEV;
84
85         if (netif_running(dev))
86                 return -EBUSY;
87
88         itype = nl80211_type_to_mac80211_type(type);
89         if (itype == IEEE80211_IF_TYPE_INVALID)
90                 return -EINVAL;
91
92         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
93
94         if (sdata->type == IEEE80211_IF_TYPE_VLAN)
95                 return -EOPNOTSUPP;
96
97         ieee80211_if_reinit(dev);
98         ieee80211_if_set_type(dev, itype);
99
100         return 0;
101 }
102
103 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
104                              u8 key_idx, u8 *mac_addr,
105                              struct key_params *params)
106 {
107         struct ieee80211_sub_if_data *sdata;
108         struct sta_info *sta = NULL;
109         enum ieee80211_key_alg alg;
110         int ret;
111
112         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
113
114         switch (params->cipher) {
115         case WLAN_CIPHER_SUITE_WEP40:
116         case WLAN_CIPHER_SUITE_WEP104:
117                 alg = ALG_WEP;
118                 break;
119         case WLAN_CIPHER_SUITE_TKIP:
120                 alg = ALG_TKIP;
121                 break;
122         case WLAN_CIPHER_SUITE_CCMP:
123                 alg = ALG_CCMP;
124                 break;
125         default:
126                 return -EINVAL;
127         }
128
129         if (mac_addr) {
130                 sta = sta_info_get(sdata->local, mac_addr);
131                 if (!sta)
132                         return -ENOENT;
133         }
134
135         ret = 0;
136         if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
137                                  params->key_len, params->key))
138                 ret = -ENOMEM;
139
140         if (sta)
141                 sta_info_put(sta);
142
143         return ret;
144 }
145
146 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
147                              u8 key_idx, u8 *mac_addr)
148 {
149         struct ieee80211_sub_if_data *sdata;
150         struct sta_info *sta;
151         int ret;
152
153         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
154
155         if (mac_addr) {
156                 sta = sta_info_get(sdata->local, mac_addr);
157                 if (!sta)
158                         return -ENOENT;
159
160                 ret = 0;
161                 if (sta->key)
162                         ieee80211_key_free(sta->key);
163                 else
164                         ret = -ENOENT;
165
166                 sta_info_put(sta);
167                 return ret;
168         }
169
170         if (!sdata->keys[key_idx])
171                 return -ENOENT;
172
173         ieee80211_key_free(sdata->keys[key_idx]);
174
175         return 0;
176 }
177
178 static int ieee80211_config_default_key(struct wiphy *wiphy,
179                                         struct net_device *dev,
180                                         u8 key_idx)
181 {
182         struct ieee80211_sub_if_data *sdata;
183
184         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
185         ieee80211_set_default_key(sdata, key_idx);
186
187         return 0;
188 }
189
190 struct cfg80211_ops mac80211_config_ops = {
191         .add_virtual_intf = ieee80211_add_iface,
192         .del_virtual_intf = ieee80211_del_iface,
193         .change_virtual_intf = ieee80211_change_iface,
194         .add_key = ieee80211_add_key,
195         .del_key = ieee80211_del_key,
196         .set_default_key = ieee80211_config_default_key,
197 };