2 * ieee80211softmac.h - public interface to the softmac
4 * Copyright (c) 2005 Johannes Berg <johannes@sipsolutions.net>
5 * Joseph Jezak <josejx@gentoo.org>
6 * Larry Finger <Larry.Finger@lwfinger.net>
7 * Danny van Dyk <kugelfang@gentoo.org>
8 * Michael Buesch <mbuesch@freenet.de>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 * The full GNU General Public License is included in this distribution in the
24 * file called COPYING.
27 #ifndef IEEE80211SOFTMAC_H_
28 #define IEEE80211SOFTMAC_H_
30 #include <linux/kernel.h>
31 #include <linux/spinlock.h>
32 #include <linux/workqueue.h>
33 #include <linux/list.h>
34 #include <net/ieee80211.h>
36 /* Once the API is considered more or less stable,
37 * this should be incremented on API incompatible changes.
39 #define IEEE80211SOFTMAC_API 0
41 #define IEEE80211SOFTMAC_MAX_RATES_LEN 8
42 #define IEEE80211SOFTMAC_MAX_EX_RATES_LEN 255
44 struct ieee80211softmac_ratesinfo {
46 u8 rates[IEEE80211SOFTMAC_MAX_RATES_LEN + IEEE80211SOFTMAC_MAX_EX_RATES_LEN];
49 /* internal structures */
50 struct ieee80211softmac_network;
51 struct ieee80211softmac_scaninfo;
53 struct ieee80211softmac_essid {
55 char data[IW_ESSID_MAX_SIZE+1];
58 struct ieee80211softmac_wpa {
65 * Information about association
67 struct ieee80211softmac_assoc_info {
72 * This is the requested ESSID. It is written
73 * only by the WX handlers.
76 struct ieee80211softmac_essid req_essid;
78 * the ESSID of the network we're currently
79 * associated (or trying) to. This is
80 * updated to the network's actual ESSID
81 * even if the requested ESSID was 'ANY'
83 struct ieee80211softmac_essid associate_essid;
85 /* BSSID we're trying to associate to */
89 * static_essid is valid if the essid is constant,
90 * this is for use by the wx handlers only.
92 * associating is true, if the network has been
93 * auth'ed on and we are in the process of associating.
95 * bssvalid is true if we found a matching network
96 * and saved it's BSSID into the bssid above.
98 * bssfixed is used for SIOCSIWAP.
101 u8 short_preamble_available;
108 /* Scan retries remaining */
111 struct delayed_work work;
112 struct delayed_work timeout;
115 struct ieee80211softmac_bss_info {
116 /* Rates supported by the network */
117 struct ieee80211softmac_ratesinfo supported_rates;
119 /* This indicates whether frames can currently be transmitted with
120 * short preamble (only use this variable during TX at CCK rates) */
123 /* This indicates whether protection (e.g. self-CTS) should be used
124 * when transmitting with OFDM modulation */
129 IEEE80211SOFTMAC_AUTH_OPEN_REQUEST = 1,
130 IEEE80211SOFTMAC_AUTH_OPEN_RESPONSE = 2,
134 IEEE80211SOFTMAC_AUTH_SHARED_REQUEST = 1,
135 IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE = 2,
136 IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE = 3,
137 IEEE80211SOFTMAC_AUTH_SHARED_PASS = 4,
140 /* We should make these tunable
141 * AUTH_TIMEOUT seems really long, but that's what it is in BSD */
142 #define IEEE80211SOFTMAC_AUTH_TIMEOUT (12 * HZ)
143 #define IEEE80211SOFTMAC_AUTH_RETRY_LIMIT 5
144 #define IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT 3
146 struct ieee80211softmac_txrates {
147 /* The Bit-Rate to be used for multicast frames. */
150 /* The Bit-Rate to be used for multicast management frames. */
153 /* The Bit-Rate to be used for any other (normal) data packet. */
155 /* The Bit-Rate to be used for default fallback
156 * (If the device supports fallback and hardware-retry)
160 /* This is the rate that the user asked for */
164 /* Bits for txrates_change callback. */
165 #define IEEE80211SOFTMAC_TXRATECHG_DEFAULT (1 << 0) /* default_rate */
166 #define IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK (1 << 1) /* default_fallback */
167 #define IEEE80211SOFTMAC_TXRATECHG_MCAST (1 << 2) /* mcast_rate */
168 #define IEEE80211SOFTMAC_TXRATECHG_MGT_MCAST (1 << 3) /* mgt_mcast_rate */
170 #define IEEE80211SOFTMAC_BSSINFOCHG_RATES (1 << 0) /* supported_rates */
171 #define IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE (1 << 1) /* short_preamble */
172 #define IEEE80211SOFTMAC_BSSINFOCHG_PROTECTION (1 << 2) /* use_protection */
174 struct ieee80211softmac_device {
175 /* 802.11 structure for data stuff */
176 struct ieee80211_device *ieee;
177 struct net_device *dev;
179 /* only valid if associated, then holds the Association ID */
182 /* the following methods are callbacks that the driver
183 * using this framework has to assign
186 /* always assign these */
187 void (*set_bssid_filter)(struct net_device *dev, const u8 *bssid);
188 void (*set_channel)(struct net_device *dev, u8 channel);
190 /* assign if you need it, informational only */
191 void (*link_change)(struct net_device *dev);
193 /* If the hardware can do scanning, assign _all_ three of these callbacks.
194 * When the scan finishes, call ieee80211softmac_scan_finished().
197 /* when called, start_scan is guaranteed to not be called again
198 * until you call ieee80211softmac_scan_finished.
199 * Return 0 if scanning could start, error otherwise.
200 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_start_scan */
201 int (*start_scan)(struct net_device *dev);
202 /* this should block until after ieee80211softmac_scan_finished was called
203 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_wait_for_scan */
204 void (*wait_for_scan)(struct net_device *dev);
205 /* stop_scan aborts a scan, but is asynchronous.
206 * if you want to wait for it too, use wait_for_scan
207 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_stop_scan */
208 void (*stop_scan)(struct net_device *dev);
210 /* we'll need something about beacons here too, for AP or ad-hoc modes */
212 /* Transmission rates to be used by the driver.
213 * The SoftMAC figures out the best possible rates.
214 * The driver just needs to read them.
216 struct ieee80211softmac_txrates txrates;
218 /* If the driver needs to do stuff on TX rate changes, assign this
219 * callback. See IEEE80211SOFTMAC_TXRATECHG for change flags. */
220 void (*txrates_change)(struct net_device *dev,
223 /* If the driver needs to do stuff when BSS properties change, assign
224 * this callback. see IEEE80211SOFTMAC_BSSINFOCHG for change flags. */
225 void (*bssinfo_change)(struct net_device *dev,
228 /* private stuff follows */
229 /* this lock protects this structure */
232 struct workqueue_struct *wq;
234 u8 running; /* SoftMAC started? */
237 struct ieee80211softmac_scaninfo *scaninfo;
238 struct ieee80211softmac_assoc_info associnfo;
239 struct ieee80211softmac_bss_info bssinfo;
241 struct list_head auth_queue;
242 struct list_head events;
244 struct ieee80211softmac_ratesinfo ratesinfo;
248 struct ieee80211softmac_wpa wpa;
250 /* we need to keep a list of network structs we copied */
251 struct list_head network_list;
253 /* This must be the last item so that it points to the data
254 * allocated beyond this structure by alloc_ieee80211 */
258 extern void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm);
260 static inline void * ieee80211softmac_priv(struct net_device *dev)
262 return ((struct ieee80211softmac_device *)ieee80211_priv(dev))->priv;
265 extern struct net_device * alloc_ieee80211softmac(int sizeof_priv);
266 extern void free_ieee80211softmac(struct net_device *dev);
268 /* Call this function if you detect a lost TX fragment.
269 * (If the device indicates failure of ACK RX, for example.)
270 * It is wise to call this function if you are able to detect lost packets,
271 * because it contributes to the TX Rates auto adjustment.
273 extern void ieee80211softmac_fragment_lost(struct net_device *dev,
274 u16 wireless_sequence_number);
275 /* Call this function before _start to tell the softmac what rates
276 * the hw supports. The rates parameter is copied, so you can
277 * free it right after calling this function.
278 * Note that the rates need to be sorted. */
279 extern void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates);
281 /* Finds the highest rate which is:
282 * 1. Present in ri (optionally a basic rate)
283 * 2. Supported by the device
284 * 3. Less than or equal to the user-defined rate
286 extern u8 ieee80211softmac_highest_supported_rate(struct ieee80211softmac_device *mac,
287 struct ieee80211softmac_ratesinfo *ri, int basic_only);
289 /* Helper function which advises you the rate at which a frame should be
291 static inline u8 ieee80211softmac_suggest_txrate(struct ieee80211softmac_device *mac,
295 struct ieee80211softmac_txrates *txrates = &mac->txrates;
297 if (!mac->associnfo.associated)
298 return txrates->mgt_mcast_rate;
300 /* We are associated, sending unicast frame */
302 return txrates->default_rate;
304 /* We are associated, sending multicast frame */
306 return txrates->mgt_mcast_rate;
308 return txrates->mcast_rate;
311 /* Helper function which advises you when it is safe to transmit with short
313 * You should only call this function when transmitting at CCK rates. */
314 static inline int ieee80211softmac_short_preamble_ok(struct ieee80211softmac_device *mac,
318 return (is_multicast && is_mgt) ? 0 : mac->bssinfo.short_preamble;
321 /* Helper function which advises you whether protection (e.g. self-CTS) is
322 * needed. 1 = protection needed, 0 = no protection needed
323 * Only use this function when transmitting with OFDM modulation. */
324 static inline int ieee80211softmac_protection_needed(struct ieee80211softmac_device *mac)
326 return mac->bssinfo.use_protection;
329 /* Start the SoftMAC. Call this after you initialized the device
330 * and it is ready to run.
332 extern void ieee80211softmac_start(struct net_device *dev);
333 /* Stop the SoftMAC. Call this before you shutdown the device. */
334 extern void ieee80211softmac_stop(struct net_device *dev);
340 /* valid event types */
341 #define IEEE80211SOFTMAC_EVENT_ANY -1 /*private use only*/
342 #define IEEE80211SOFTMAC_EVENT_SCAN_FINISHED 0
343 #define IEEE80211SOFTMAC_EVENT_ASSOCIATED 1
344 #define IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED 2
345 #define IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT 3
346 #define IEEE80211SOFTMAC_EVENT_AUTHENTICATED 4
347 #define IEEE80211SOFTMAC_EVENT_AUTH_FAILED 5
348 #define IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT 6
349 #define IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND 7
350 #define IEEE80211SOFTMAC_EVENT_DISASSOCIATED 8
351 /* keep this updated! */
352 #define IEEE80211SOFTMAC_EVENT_LAST 8
354 * If you want to be notified of certain events, you can call
355 * ieee80211softmac_notify[_atomic] with
356 * - event set to one of the constants below
357 * - fun set to a function pointer of the appropriate type
358 * - context set to the context data you want passed
359 * The return value is 0, or an error.
361 typedef void (*notify_function_ptr)(struct net_device *dev, int event_type, void *context);
363 #define ieee80211softmac_notify(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_KERNEL);
364 #define ieee80211softmac_notify_atomic(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_ATOMIC);
366 extern int ieee80211softmac_notify_gfp(struct net_device *dev,
367 int event, notify_function_ptr fun, void *context, gfp_t gfp_mask);
369 /* To clear pending work (for ifconfig down, etc.) */
371 ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm);
373 #endif /* IEEE80211SOFTMAC_H_ */