Johannes Berg | 4855d25 | 2006-01-12 21:12:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Event system |
| 3 | * Also see comments in public header file and longer explanation below. |
| 4 | * |
Johannes Berg | 7985905 | 2006-01-31 19:31:41 +0100 | [diff] [blame] | 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> |
Johannes Berg | 4855d25 | 2006-01-12 21:12:59 +0100 | [diff] [blame] | 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. |
| 19 | * |
| 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 | |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 28 | #include "ieee80211softmac_priv.h" |
| 29 | |
| 30 | /* |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 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: |
| 41 | * SCAN_FINISHED: no special meaning |
| 42 | * ASSOCIATED, |
| 43 | * ASSOCIATE_FAILED, |
| 44 | * ASSOCIATE_TIMEOUT, |
| 45 | * AUTHENTICATED, |
| 46 | * AUTH_FAILED, |
| 47 | * AUTH_TIMEOUT: a pointer to the network struct |
| 48 | * ... |
| 49 | * Code within this module can use the event context to be only |
| 50 | * called when the event is true for that specific context |
| 51 | * as per above table. |
| 52 | * If the event context is NULL, then the notification is always called, |
| 53 | * regardless of the event context. The event context is not passed to |
| 54 | * the callback, it is assumed that the context suffices. |
| 55 | * |
| 56 | * You can also use the event context only by setting the event type |
| 57 | * to -1 (private use only), in which case you'll be notified |
| 58 | * whenever the event context matches. |
| 59 | */ |
| 60 | |
| 61 | static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = { |
| 62 | "scan finished", |
| 63 | "associated", |
| 64 | "associating failed", |
| 65 | "associating timed out", |
| 66 | "authenticated", |
| 67 | "authenticating failed", |
| 68 | "authenticating timed out", |
| 69 | "associating failed because no suitable network was found", |
| 70 | }; |
| 71 | |
| 72 | |
| 73 | static void |
| 74 | ieee80211softmac_notify_callback(void *d) |
| 75 | { |
| 76 | struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d; |
| 77 | kfree(d); |
| 78 | |
| 79 | event.fun(event.mac->dev, event.context); |
| 80 | } |
| 81 | |
| 82 | int |
| 83 | ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac, |
| 84 | int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask) |
| 85 | { |
| 86 | struct ieee80211softmac_event *eventptr; |
| 87 | unsigned long flags; |
| 88 | |
| 89 | if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST) |
| 90 | return -ENOSYS; |
| 91 | |
| 92 | if (!fun) |
| 93 | return -EINVAL; |
| 94 | |
| 95 | eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask); |
| 96 | if (!eventptr) |
| 97 | return -ENOMEM; |
| 98 | |
| 99 | eventptr->event_type = event; |
| 100 | INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr); |
| 101 | eventptr->fun = fun; |
| 102 | eventptr->context = context; |
| 103 | eventptr->mac = mac; |
| 104 | eventptr->event_context = event_context; |
| 105 | |
| 106 | spin_lock_irqsave(&mac->lock, flags); |
| 107 | list_add(&eventptr->list, &mac->events); |
| 108 | spin_unlock_irqrestore(&mac->lock, flags); |
| 109 | |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | int |
| 114 | ieee80211softmac_notify_gfp(struct net_device *dev, |
| 115 | int event, notify_function_ptr fun, void *context, gfp_t gfp_mask) |
| 116 | { |
| 117 | struct ieee80211softmac_device *mac = ieee80211_priv(dev); |
| 118 | |
| 119 | if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST) |
| 120 | return -ENOSYS; |
| 121 | |
| 122 | return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask); |
| 123 | } |
| 124 | EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp); |
| 125 | |
| 126 | /* private -- calling all callbacks that were specified */ |
| 127 | void |
| 128 | ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx) |
| 129 | { |
| 130 | struct ieee80211softmac_event *eventptr, *tmp; |
| 131 | union iwreq_data wrqu; |
| 132 | char *msg; |
| 133 | |
| 134 | if (event >= 0) { |
| 135 | msg = event_descriptions[event]; |
| 136 | wrqu.data.length = strlen(msg); |
| 137 | wireless_send_event(mac->dev, IWEVCUSTOM, &wrqu, msg); |
| 138 | } |
| 139 | |
| 140 | if (!list_empty(&mac->events)) |
| 141 | list_for_each_entry_safe(eventptr, tmp, &mac->events, list) { |
| 142 | if ((eventptr->event_type == event || eventptr->event_type == -1) |
| 143 | && (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) { |
| 144 | list_del(&eventptr->list); |
Johannes Berg | 5c4df6d | 2006-01-06 01:43:45 +0100 | [diff] [blame] | 145 | schedule_work(&eventptr->work); |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 146 | } |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | void |
| 151 | ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx) |
| 152 | { |
| 153 | unsigned long flags; |
| 154 | |
| 155 | spin_lock_irqsave(&mac->lock, flags); |
| 156 | ieee80211softmac_call_events_locked(mac, event, event_ctx); |
| 157 | |
| 158 | spin_unlock_irqrestore(&mac->lock, flags); |
| 159 | } |