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1 | /* |
2 | * Event system | |
4855d25b JB |
3 | * Also see comments in public header file and longer explanation below. |
4 | * | |
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5 | * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net> |
6 | * Joseph Jezak <josejx@gentoo.org> | |
7 | * Larry Finger <Larry.Finger@lwfinger.net> | |
8 | * Danny van Dyk <kugelfang@gentoo.org> | |
9 | * Michael Buesch <mbuesch@freenet.de> | |
4855d25b JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
18 | * more details. | |
370121e5 | 19 | * |
4855d25b JB |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution in the | |
25 | * file called COPYING. | |
26 | */ | |
27 | ||
28 | #include "ieee80211softmac_priv.h" | |
29 | ||
30 | /* | |
370121e5 JB |
31 | * Each event has associated to it |
32 | * - an event type (see constants in public header) | |
33 | * - an event context (see below) | |
34 | * - the function to be called | |
35 | * - a context (extra parameter to call the function with) | |
36 | * - and the softmac struct | |
37 | * | |
38 | * The event context is private and can only be used from | |
39 | * within this module. Its meaning varies with the event | |
40 | * type: | |
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41 | * SCAN_FINISHED, |
42 | * DISASSOCIATED: NULL | |
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43 | * ASSOCIATED, |
44 | * ASSOCIATE_FAILED, | |
45 | * ASSOCIATE_TIMEOUT, | |
46 | * AUTHENTICATED, | |
47 | * AUTH_FAILED, | |
48 | * AUTH_TIMEOUT: a pointer to the network struct | |
49 | * ... | |
50 | * Code within this module can use the event context to be only | |
51 | * called when the event is true for that specific context | |
52 | * as per above table. | |
53 | * If the event context is NULL, then the notification is always called, | |
54 | * regardless of the event context. The event context is not passed to | |
55 | * the callback, it is assumed that the context suffices. | |
56 | * | |
57 | * You can also use the event context only by setting the event type | |
58 | * to -1 (private use only), in which case you'll be notified | |
59 | * whenever the event context matches. | |
60 | */ | |
61 | ||
62 | static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = { | |
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63 | NULL, /* scan finished */ |
64 | NULL, /* associated */ | |
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65 | "associating failed", |
66 | "associating timed out", | |
67 | "authenticated", | |
68 | "authenticating failed", | |
69 | "authenticating timed out", | |
70 | "associating failed because no suitable network was found", | |
921a91ef | 71 | NULL, /* disassociated */ |
370121e5 JB |
72 | }; |
73 | ||
74 | ||
75 | static void | |
76 | ieee80211softmac_notify_callback(void *d) | |
77 | { | |
78 | struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d; | |
79 | kfree(d); | |
80 | ||
81 | event.fun(event.mac->dev, event.context); | |
82 | } | |
83 | ||
84 | int | |
85 | ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac, | |
86 | int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask) | |
87 | { | |
88 | struct ieee80211softmac_event *eventptr; | |
89 | unsigned long flags; | |
90 | ||
91 | if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST) | |
92 | return -ENOSYS; | |
93 | ||
94 | if (!fun) | |
95 | return -EINVAL; | |
96 | ||
97 | eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask); | |
98 | if (!eventptr) | |
99 | return -ENOMEM; | |
100 | ||
101 | eventptr->event_type = event; | |
102 | INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr); | |
103 | eventptr->fun = fun; | |
104 | eventptr->context = context; | |
105 | eventptr->mac = mac; | |
106 | eventptr->event_context = event_context; | |
107 | ||
108 | spin_lock_irqsave(&mac->lock, flags); | |
109 | list_add(&eventptr->list, &mac->events); | |
110 | spin_unlock_irqrestore(&mac->lock, flags); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | int | |
116 | ieee80211softmac_notify_gfp(struct net_device *dev, | |
117 | int event, notify_function_ptr fun, void *context, gfp_t gfp_mask) | |
118 | { | |
119 | struct ieee80211softmac_device *mac = ieee80211_priv(dev); | |
120 | ||
121 | if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST) | |
122 | return -ENOSYS; | |
123 | ||
124 | return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask); | |
125 | } | |
126 | EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp); | |
127 | ||
128 | /* private -- calling all callbacks that were specified */ | |
129 | void | |
130 | ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx) | |
131 | { | |
132 | struct ieee80211softmac_event *eventptr, *tmp; | |
feeeaa87 | 133 | struct ieee80211softmac_network *network; |
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134 | |
135 | if (event >= 0) { | |
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136 | union iwreq_data wrqu; |
137 | int we_event; | |
138 | char *msg = NULL; | |
139 | ||
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140 | memset(&wrqu, '\0', sizeof (union iwreq_data)); |
141 | ||
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142 | switch(event) { |
143 | case IEEE80211SOFTMAC_EVENT_ASSOCIATED: | |
144 | network = (struct ieee80211softmac_network *)event_ctx; | |
feeeaa87 | 145 | memcpy(wrqu.ap_addr.sa_data, &network->bssid[0], ETH_ALEN); |
921a91ef | 146 | /* fall through */ |
feeeaa87 | 147 | case IEEE80211SOFTMAC_EVENT_DISASSOCIATED: |
feeeaa87 JB |
148 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
149 | we_event = SIOCGIWAP; | |
150 | break; | |
6788a07f | 151 | case IEEE80211SOFTMAC_EVENT_SCAN_FINISHED: |
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152 | we_event = SIOCGIWSCAN; |
153 | break; | |
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154 | default: |
155 | msg = event_descriptions[event]; | |
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156 | if (!msg) |
157 | msg = "SOFTMAC EVENT BUG"; | |
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158 | wrqu.data.length = strlen(msg); |
159 | we_event = IWEVCUSTOM; | |
160 | break; | |
161 | } | |
162 | wireless_send_event(mac->dev, we_event, &wrqu, msg); | |
370121e5 JB |
163 | } |
164 | ||
165 | if (!list_empty(&mac->events)) | |
166 | list_for_each_entry_safe(eventptr, tmp, &mac->events, list) { | |
167 | if ((eventptr->event_type == event || eventptr->event_type == -1) | |
168 | && (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) { | |
169 | list_del(&eventptr->list); | |
5c4df6da | 170 | schedule_work(&eventptr->work); |
370121e5 JB |
171 | } |
172 | } | |
173 | } | |
174 | ||
175 | void | |
176 | ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx) | |
177 | { | |
178 | unsigned long flags; | |
179 | ||
180 | spin_lock_irqsave(&mac->lock, flags); | |
181 | ieee80211softmac_call_events_locked(mac, event, event_ctx); | |
182 | ||
183 | spin_unlock_irqrestore(&mac->lock, flags); | |
184 | } |