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f0706e82 | 1 | /* |
3017b80b JB |
2 | * mac80211 <-> driver interface |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Devicescape Software, Inc. |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
3017b80b | 6 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #ifndef MAC80211_H | |
14 | #define MAC80211_H | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/if_ether.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/wireless.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/ieee80211.h> | |
22 | #include <net/wireless.h> | |
23 | #include <net/cfg80211.h> | |
24 | ||
25 | /* Note! Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be | |
26 | * called in hardware interrupt context. The low-level driver must not call any | |
27 | * other functions in hardware interrupt context. If there is a need for such | |
28 | * call, the low-level driver should first ACK the interrupt and perform the | |
29 | * IEEE 802.11 code call after this, e.g., from a scheduled tasklet (in | |
30 | * software interrupt context). | |
31 | */ | |
32 | ||
33 | /* | |
34 | * Frame format used when passing frame between low-level hardware drivers | |
35 | * and IEEE 802.11 driver the same as used in the wireless media, i.e., | |
36 | * buffers start with IEEE 802.11 header and include the same octets that | |
37 | * are sent over air. | |
38 | * | |
39 | * If hardware uses IEEE 802.3 headers (and perform 802.3 <-> 802.11 | |
40 | * conversion in firmware), upper layer 802.11 code needs to be changed to | |
41 | * support this. | |
42 | * | |
43 | * If the receive frame format is not the same as the real frame sent | |
44 | * on the wireless media (e.g., due to padding etc.), upper layer 802.11 code | |
45 | * could be updated to provide support for such format assuming this would | |
46 | * optimize the performance, e.g., by removing need to re-allocation and | |
47 | * copying of the data. | |
48 | */ | |
49 | ||
50 | #define IEEE80211_CHAN_W_SCAN 0x00000001 | |
51 | #define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002 | |
52 | #define IEEE80211_CHAN_W_IBSS 0x00000004 | |
53 | ||
54 | /* Channel information structure. Low-level driver is expected to fill in chan, | |
55 | * freq, and val fields. Other fields will be filled in by 80211.o based on | |
56 | * hostapd information and low-level driver does not need to use them. The | |
57 | * limits for each channel will be provided in 'struct ieee80211_conf' when | |
58 | * configuring the low-level driver with hw->config callback. If a device has | |
59 | * a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED | |
60 | * can be set to let the driver configure all fields */ | |
61 | struct ieee80211_channel { | |
62 | short chan; /* channel number (IEEE 802.11) */ | |
63 | short freq; /* frequency in MHz */ | |
64 | int val; /* hw specific value for the channel */ | |
65 | int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */ | |
66 | unsigned char power_level; | |
67 | unsigned char antenna_max; | |
68 | }; | |
69 | ||
70 | #define IEEE80211_RATE_ERP 0x00000001 | |
71 | #define IEEE80211_RATE_BASIC 0x00000002 | |
72 | #define IEEE80211_RATE_PREAMBLE2 0x00000004 | |
73 | #define IEEE80211_RATE_SUPPORTED 0x00000010 | |
74 | #define IEEE80211_RATE_OFDM 0x00000020 | |
75 | #define IEEE80211_RATE_CCK 0x00000040 | |
f0706e82 JB |
76 | #define IEEE80211_RATE_MANDATORY 0x00000100 |
77 | ||
78 | #define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2) | |
79 | #define IEEE80211_RATE_MODULATION(f) \ | |
80 | (f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM)) | |
81 | ||
b708e610 | 82 | /* Low-level driver should set PREAMBLE2, OFDM and CCK flags. |
f0706e82 JB |
83 | * BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the |
84 | * configuration. */ | |
85 | struct ieee80211_rate { | |
86 | int rate; /* rate in 100 kbps */ | |
87 | int val; /* hw specific value for the rate */ | |
88 | int flags; /* IEEE80211_RATE_ flags */ | |
89 | int val2; /* hw specific value for the rate when using short preamble | |
90 | * (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for | |
91 | * 2, 5.5, and 11 Mbps) */ | |
92 | signed char min_rssi_ack; | |
93 | unsigned char min_rssi_ack_delta; | |
94 | ||
95 | /* following fields are set by 80211.o and need not be filled by the | |
96 | * low-level driver */ | |
97 | int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for | |
98 | * optimizing channel utilization estimates */ | |
99 | }; | |
100 | ||
101 | /* 802.11g is backwards-compatible with 802.11b, so a wlan card can | |
102 | * actually be both in 11b and 11g modes at the same time. */ | |
b708e610 | 103 | enum ieee80211_phymode { |
f0706e82 JB |
104 | MODE_IEEE80211A, /* IEEE 802.11a */ |
105 | MODE_IEEE80211B, /* IEEE 802.11b only */ | |
f0706e82 | 106 | MODE_IEEE80211G, /* IEEE 802.11g (and 802.11b compatibility) */ |
f0706e82 JB |
107 | |
108 | /* keep last */ | |
109 | NUM_IEEE80211_MODES | |
110 | }; | |
111 | ||
112 | struct ieee80211_hw_mode { | |
113 | int mode; /* MODE_IEEE80211... */ | |
114 | int num_channels; /* Number of channels (below) */ | |
115 | struct ieee80211_channel *channels; /* Array of supported channels */ | |
116 | int num_rates; /* Number of rates (below) */ | |
117 | struct ieee80211_rate *rates; /* Array of supported rates */ | |
118 | ||
119 | struct list_head list; /* Internal, don't touch */ | |
120 | }; | |
121 | ||
122 | struct ieee80211_tx_queue_params { | |
123 | int aifs; /* 0 .. 255; -1 = use default */ | |
124 | int cw_min; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ | |
125 | int cw_max; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */ | |
126 | int burst_time; /* maximum burst time in 0.1 ms (i.e., 10 = 1 ms); | |
127 | * 0 = disabled */ | |
128 | }; | |
129 | ||
130 | struct ieee80211_tx_queue_stats_data { | |
131 | unsigned int len; /* num packets in queue */ | |
132 | unsigned int limit; /* queue len (soft) limit */ | |
133 | unsigned int count; /* total num frames sent */ | |
134 | }; | |
135 | ||
136 | enum { | |
137 | IEEE80211_TX_QUEUE_DATA0, | |
138 | IEEE80211_TX_QUEUE_DATA1, | |
139 | IEEE80211_TX_QUEUE_DATA2, | |
140 | IEEE80211_TX_QUEUE_DATA3, | |
141 | IEEE80211_TX_QUEUE_DATA4, | |
142 | IEEE80211_TX_QUEUE_SVP, | |
143 | ||
144 | NUM_TX_DATA_QUEUES, | |
145 | ||
146 | /* due to stupidity in the sub-ioctl userspace interface, the items in | |
147 | * this struct need to have fixed values. As soon as it is removed, we can | |
148 | * fix these entries. */ | |
149 | IEEE80211_TX_QUEUE_AFTER_BEACON = 6, | |
150 | IEEE80211_TX_QUEUE_BEACON = 7 | |
151 | }; | |
152 | ||
153 | struct ieee80211_tx_queue_stats { | |
154 | struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES]; | |
155 | }; | |
156 | ||
157 | struct ieee80211_low_level_stats { | |
158 | unsigned int dot11ACKFailureCount; | |
159 | unsigned int dot11RTSFailureCount; | |
160 | unsigned int dot11FCSErrorCount; | |
161 | unsigned int dot11RTSSuccessCount; | |
162 | }; | |
163 | ||
164 | /* Transmit control fields. This data structure is passed to low-level driver | |
165 | * with each TX frame. The low-level driver is responsible for configuring | |
166 | * the hardware to use given values (depending on what is supported). */ | |
167 | #define HW_KEY_IDX_INVALID -1 | |
168 | ||
169 | struct ieee80211_tx_control { | |
170 | int tx_rate; /* Transmit rate, given as the hw specific value for the | |
171 | * rate (from struct ieee80211_rate) */ | |
172 | int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw | |
173 | * specific value for the rate (from | |
174 | * struct ieee80211_rate) */ | |
175 | ||
176 | #define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for | |
177 | * this frame */ | |
178 | #define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without | |
179 | * encryption; e.g., for EAPOL | |
180 | * frames */ | |
181 | #define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending | |
182 | * frame */ | |
183 | #define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the | |
184 | * frame (e.g., for combined | |
185 | * 802.11g / 802.11b networks) */ | |
186 | #define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to | |
187 | * wait for an ack */ | |
188 | #define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5) | |
189 | #define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6) | |
190 | #define IEEE80211_TXCTL_REQUEUE (1<<7) | |
191 | #define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of | |
192 | * the frame */ | |
193 | #define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9) | |
d5d08def ID |
194 | #define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send |
195 | * using the through | |
196 | * set_retry_limit configured | |
197 | * long retry value */ | |
f0706e82 JB |
198 | u32 flags; /* tx control flags defined |
199 | * above */ | |
d5d08def ID |
200 | u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. |
201 | * This could be used when set_retry_limit | |
202 | * is not implemented by the driver */ | |
f0706e82 JB |
203 | u8 power_level; /* per-packet transmit power level, in dBm */ |
204 | u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ | |
8f20fc24 JB |
205 | s8 key_idx; /* HW_KEY_IDX_INVALID = do not encrypt, |
206 | * other values: keyidx from hw->set_key() */ | |
f0706e82 JB |
207 | u8 icv_len; /* length of the ICV/MIC field in octets */ |
208 | u8 iv_len; /* length of the IV field in octets */ | |
209 | u8 tkip_key[16]; /* generated phase2/phase1 key for hw TKIP */ | |
210 | u8 queue; /* hardware queue to use for this frame; | |
211 | * 0 = highest, hw->queues-1 = lowest */ | |
212 | u8 sw_retry_attempt; /* number of times hw has tried to | |
213 | * transmit frame (not incl. hw retries) */ | |
214 | ||
215 | struct ieee80211_rate *rate; /* internal 80211.o rate */ | |
216 | struct ieee80211_rate *rts_rate; /* internal 80211.o rate | |
217 | * for RTS/CTS */ | |
218 | int alt_retry_rate; /* retry rate for the last retries, given as the | |
219 | * hw specific value for the rate (from | |
220 | * struct ieee80211_rate). To be used to limit | |
221 | * packet dropping when probing higher rates, if hw | |
222 | * supports multiple retry rates. -1 = not used */ | |
223 | int type; /* internal */ | |
224 | int ifindex; /* internal */ | |
225 | }; | |
226 | ||
7ac1bd6a JB |
227 | |
228 | /** | |
229 | * enum mac80211_rx_flags - receive flags | |
230 | * | |
231 | * These flags are used with the @flag member of &struct ieee80211_rx_status. | |
232 | * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. | |
233 | * Use together with %RX_FLAG_MMIC_STRIPPED. | |
234 | * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. | |
235 | * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. | |
236 | * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, | |
237 | * verification has been done by the hardware. | |
238 | * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. | |
239 | * If this flag is set, the stack cannot do any replay detection | |
240 | * hence the driver or hardware will have to do that. | |
241 | */ | |
242 | enum mac80211_rx_flags { | |
243 | RX_FLAG_MMIC_ERROR = 1<<0, | |
244 | RX_FLAG_DECRYPTED = 1<<1, | |
245 | RX_FLAG_RADIOTAP = 1<<2, | |
246 | RX_FLAG_MMIC_STRIPPED = 1<<3, | |
247 | RX_FLAG_IV_STRIPPED = 1<<4, | |
248 | }; | |
249 | ||
250 | /** | |
251 | * struct ieee80211_rx_status - receive status | |
252 | * | |
253 | * The low-level driver should provide this information (the subset | |
254 | * supported by hardware) to the 802.11 code with each received | |
255 | * frame. | |
256 | * @mactime: MAC timestamp as defined by 802.11 | |
257 | * @freq: frequency the radio was tuned to when receiving this frame, in MHz | |
258 | * @channel: channel the radio was tuned to | |
259 | * @phymode: active PHY mode | |
260 | * @ssi: signal strength when receiving this frame | |
261 | * @signal: used as 'qual' in statistics reporting | |
262 | * @noise: PHY noise when receiving this frame | |
263 | * @antenna: antenna used | |
264 | * @rate: data rate | |
265 | * @flag: %RX_FLAG_* | |
266 | */ | |
f0706e82 JB |
267 | struct ieee80211_rx_status { |
268 | u64 mactime; | |
7ac1bd6a | 269 | int freq; |
f0706e82 JB |
270 | int channel; |
271 | int phymode; | |
272 | int ssi; | |
7ac1bd6a | 273 | int signal; |
f0706e82 JB |
274 | int noise; |
275 | int antenna; | |
276 | int rate; | |
f0706e82 JB |
277 | int flag; |
278 | }; | |
279 | ||
280 | /* Transmit status. The low-level driver should provide this information | |
281 | * (the subset supported by hardware) to the 802.11 code for each transmit | |
282 | * frame. */ | |
283 | struct ieee80211_tx_status { | |
284 | /* copied ieee80211_tx_control structure */ | |
285 | struct ieee80211_tx_control control; | |
286 | ||
287 | #define IEEE80211_TX_STATUS_TX_FILTERED (1<<0) | |
288 | #define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */ | |
289 | u32 flags; /* tx staus flags defined above */ | |
290 | ||
291 | int ack_signal; /* measured signal strength of the ACK frame */ | |
292 | int excessive_retries; | |
293 | int retry_count; | |
294 | ||
295 | int queue_length; /* information about TX queue */ | |
296 | int queue_number; | |
297 | }; | |
298 | ||
299 | ||
300 | /** | |
301 | * struct ieee80211_conf - configuration of the device | |
302 | * | |
303 | * This struct indicates how the driver shall configure the hardware. | |
304 | * | |
305 | * @radio_enabled: when zero, driver is required to switch off the radio. | |
306 | */ | |
307 | struct ieee80211_conf { | |
308 | int channel; /* IEEE 802.11 channel number */ | |
309 | int freq; /* MHz */ | |
310 | int channel_val; /* hw specific value for the channel */ | |
311 | ||
312 | int phymode; /* MODE_IEEE80211A, .. */ | |
313 | struct ieee80211_channel *chan; | |
314 | struct ieee80211_hw_mode *mode; | |
315 | unsigned int regulatory_domain; | |
316 | int radio_enabled; | |
317 | ||
318 | int beacon_int; | |
319 | ||
320 | #define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot | |
321 | * Time */ | |
322 | #define IEEE80211_CONF_SSID_HIDDEN (1<<1) /* do not broadcast the ssid */ | |
323 | #define IEEE80211_CONF_RADIOTAP (1<<2) /* use radiotap if supported | |
324 | check this bit at RX time */ | |
325 | u32 flags; /* configuration flags defined above */ | |
326 | ||
327 | u8 power_level; /* transmit power limit for current | |
328 | * regulatory domain; in dBm */ | |
329 | u8 antenna_max; /* maximum antenna gain */ | |
f0706e82 JB |
330 | |
331 | /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */ | |
332 | u8 antenna_sel_tx; | |
333 | u8 antenna_sel_rx; | |
f0706e82 JB |
334 | }; |
335 | ||
336 | /** | |
337 | * enum ieee80211_if_types - types of 802.11 network interfaces | |
338 | * | |
339 | * @IEEE80211_IF_TYPE_AP: interface in AP mode. | |
340 | * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap | |
341 | * daemon. Drivers should never see this type. | |
342 | * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. | |
343 | * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. | |
344 | * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. | |
345 | * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. | |
346 | * @IEEE80211_IF_TYPE_VLAN: not used. | |
347 | */ | |
348 | enum ieee80211_if_types { | |
349 | IEEE80211_IF_TYPE_AP = 0x00000000, | |
350 | IEEE80211_IF_TYPE_MGMT = 0x00000001, | |
351 | IEEE80211_IF_TYPE_STA = 0x00000002, | |
352 | IEEE80211_IF_TYPE_IBSS = 0x00000003, | |
353 | IEEE80211_IF_TYPE_MNTR = 0x00000004, | |
354 | IEEE80211_IF_TYPE_WDS = 0x5A580211, | |
355 | IEEE80211_IF_TYPE_VLAN = 0x00080211, | |
356 | }; | |
357 | ||
358 | /** | |
359 | * struct ieee80211_if_init_conf - initial configuration of an interface | |
360 | * | |
361 | * @if_id: internal interface ID. This number has no particular meaning to | |
362 | * drivers and the only allowed usage is to pass it to | |
363 | * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions. | |
364 | * This field is not valid for monitor interfaces | |
365 | * (interfaces of %IEEE80211_IF_TYPE_MNTR type). | |
366 | * @type: one of &enum ieee80211_if_types constants. Determines the type of | |
367 | * added/removed interface. | |
368 | * @mac_addr: pointer to MAC address of the interface. This pointer is valid | |
369 | * until the interface is removed (i.e. it cannot be used after | |
370 | * remove_interface() callback was called for this interface). | |
4480f15c | 371 | * This pointer will be %NULL for monitor interfaces, be careful. |
f0706e82 JB |
372 | * |
373 | * This structure is used in add_interface() and remove_interface() | |
374 | * callbacks of &struct ieee80211_hw. | |
4480f15c JB |
375 | * |
376 | * When you allow multiple interfaces to be added to your PHY, take care | |
377 | * that the hardware can actually handle multiple MAC addresses. However, | |
378 | * also take care that when there's no interface left with mac_addr != %NULL | |
379 | * you remove the MAC address from the device to avoid acknowledging packets | |
380 | * in pure monitor mode. | |
f0706e82 JB |
381 | */ |
382 | struct ieee80211_if_init_conf { | |
383 | int if_id; | |
384 | int type; | |
385 | void *mac_addr; | |
386 | }; | |
387 | ||
388 | /** | |
389 | * struct ieee80211_if_conf - configuration of an interface | |
390 | * | |
391 | * @type: type of the interface. This is always the same as was specified in | |
392 | * &struct ieee80211_if_init_conf. The type of an interface never changes | |
393 | * during the life of the interface; this field is present only for | |
394 | * convenience. | |
395 | * @bssid: BSSID of the network we are associated to/creating. | |
396 | * @ssid: used (together with @ssid_len) by drivers for hardware that | |
397 | * generate beacons independently. The pointer is valid only during the | |
398 | * config_interface() call, so copy the value somewhere if you need | |
399 | * it. | |
400 | * @ssid_len: length of the @ssid field. | |
401 | * @generic_elem: used (together with @generic_elem_len) by drivers for | |
402 | * hardware that generate beacons independently. The pointer is valid | |
403 | * only during the config_interface() call, so copy the value somewhere | |
404 | * if you need it. | |
405 | * @generic_elem_len: length of the generic element. | |
406 | * @beacon: beacon template. Valid only if @host_gen_beacon_template in | |
407 | * &struct ieee80211_hw is set. The driver is responsible of freeing | |
408 | * the sk_buff. | |
409 | * @beacon_control: tx_control for the beacon template, this field is only | |
410 | * valid when the @beacon field was set. | |
411 | * | |
412 | * This structure is passed to the config_interface() callback of | |
413 | * &struct ieee80211_hw. | |
414 | */ | |
415 | struct ieee80211_if_conf { | |
416 | int type; | |
417 | u8 *bssid; | |
418 | u8 *ssid; | |
419 | size_t ssid_len; | |
420 | u8 *generic_elem; | |
421 | size_t generic_elem_len; | |
422 | struct sk_buff *beacon; | |
423 | struct ieee80211_tx_control *beacon_control; | |
424 | }; | |
425 | ||
7ac1bd6a JB |
426 | /** |
427 | * enum ieee80211_key_alg - key algorithm | |
428 | * @ALG_NONE: Unset key algorithm, will never be passed to the driver | |
429 | * @ALG_WEP: WEP40 or WEP104 | |
430 | * @ALG_TKIP: TKIP | |
431 | * @ALG_CCMP: CCMP (AES) | |
432 | */ | |
433 | typedef enum ieee80211_key_alg { | |
8f20fc24 JB |
434 | ALG_NONE, |
435 | ALG_WEP, | |
436 | ALG_TKIP, | |
437 | ALG_CCMP, | |
438 | } ieee80211_key_alg; | |
f0706e82 | 439 | |
7ac1bd6a JB |
440 | |
441 | /** | |
442 | * enum ieee80211_key_flags - key flags | |
443 | * | |
444 | * These flags are used for communication about keys between the driver | |
445 | * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. | |
446 | * | |
447 | * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates | |
448 | * that the STA this key will be used with could be using QoS. | |
449 | * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the | |
450 | * driver to indicate that it requires IV generation for this | |
451 | * particular key. | |
452 | * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by | |
453 | * the driver for a TKIP key if it requires Michael MIC | |
454 | * generation in software. | |
7848ba7d | 455 | */ |
7ac1bd6a JB |
456 | enum ieee80211_key_flags { |
457 | IEEE80211_KEY_FLAG_WMM_STA = 1<<0, | |
458 | IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, | |
459 | IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, | |
460 | }; | |
11a843b7 | 461 | |
7ac1bd6a JB |
462 | /** |
463 | * struct ieee80211_key_conf - key information | |
464 | * | |
465 | * This key information is given by mac80211 to the driver by | |
466 | * the set_key() callback in &struct ieee80211_ops. | |
467 | * | |
468 | * @hw_key_idx: To be set by the driver, this is the key index the driver | |
469 | * wants to be given when a frame is transmitted and needs to be | |
470 | * encrypted in hardware. It defaults to %HW_KEY_IDX_INVALID which | |
471 | * the driver may not use. | |
472 | * @alg: The key algorithm. | |
473 | * @flags: key flags, see &enum ieee80211_key_flags. | |
474 | * @keyidx: the key index (0-3) | |
475 | * @keylen: key material length | |
476 | * @key: key material | |
477 | */ | |
f0706e82 | 478 | struct ieee80211_key_conf { |
8f20fc24 | 479 | int hw_key_idx; |
f0706e82 | 480 | ieee80211_key_alg alg; |
11a843b7 | 481 | u8 flags; |
11a843b7 | 482 | s8 keyidx; |
11a843b7 | 483 | u8 keylen; |
f0706e82 JB |
484 | u8 key[0]; |
485 | }; | |
486 | ||
487 | #define IEEE80211_SEQ_COUNTER_RX 0 | |
488 | #define IEEE80211_SEQ_COUNTER_TX 1 | |
489 | ||
7ac1bd6a JB |
490 | /** |
491 | * enum set_key_cmd - key command | |
492 | * | |
493 | * Used with the set_key() callback in &struct ieee80211_ops, this | |
494 | * indicates whether a key is being removed or added. | |
495 | * | |
496 | * @SET_KEY: a key is set | |
497 | * @DISABLE_KEY: a key must be disabled | |
498 | */ | |
499 | typedef enum set_key_cmd { | |
11a843b7 | 500 | SET_KEY, DISABLE_KEY, |
f0706e82 JB |
501 | } set_key_cmd; |
502 | ||
7ac1bd6a JB |
503 | /** |
504 | * struct ieee80211_hw - hardware information and state | |
505 | * TODO: move documentation into kernel-doc format | |
506 | */ | |
f0706e82 JB |
507 | struct ieee80211_hw { |
508 | /* points to the cfg80211 wiphy for this piece. Note | |
509 | * that you must fill in the perm_addr and dev fields | |
510 | * of this structure, use the macros provided below. */ | |
511 | struct wiphy *wiphy; | |
512 | ||
513 | /* assigned by mac80211, don't write */ | |
514 | struct ieee80211_conf conf; | |
515 | ||
516 | /* Single thread workqueue available for driver use | |
517 | * Allocated by mac80211 on registration */ | |
518 | struct workqueue_struct *workqueue; | |
519 | ||
520 | /* Pointer to the private area that was | |
521 | * allocated with this struct for you. */ | |
522 | void *priv; | |
523 | ||
524 | /* The rest is information about your hardware */ | |
525 | ||
526 | /* TODO: frame_type 802.11/802.3, sw_encryption requirements */ | |
527 | ||
0ef6e49b JB |
528 | /* hole at 0 */ |
529 | ||
530 | /* | |
531 | * The device only needs to be supplied with a beacon template. | |
532 | * If you need the host to generate each beacon then don't use | |
533 | * this flag and use ieee80211_beacon_get(). | |
534 | */ | |
f0706e82 JB |
535 | #define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1) |
536 | ||
7848ba7d | 537 | /* hole at 2 */ |
f0706e82 JB |
538 | |
539 | /* Whether RX frames passed to ieee80211_rx() include FCS in the end */ | |
540 | #define IEEE80211_HW_RX_INCLUDES_FCS (1<<3) | |
541 | ||
542 | /* Some wireless LAN chipsets buffer broadcast/multicast frames for | |
543 | * power saving stations in the hardware/firmware and others rely on | |
544 | * the host system for such buffering. This option is used to | |
545 | * configure the IEEE 802.11 upper layer to buffer broadcast/multicast | |
546 | * frames when there are power saving stations so that low-level driver | |
547 | * can fetch them with ieee80211_get_buffered_bc(). */ | |
548 | #define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4) | |
549 | ||
7848ba7d | 550 | /* hole at 5 */ |
f0706e82 | 551 | |
aaa92e9a | 552 | /* hole at 6 */ |
f0706e82 | 553 | |
11a843b7 | 554 | /* hole at 7 */ |
f0706e82 | 555 | |
7848ba7d | 556 | /* hole at 8 */ |
f0706e82 JB |
557 | |
558 | /* Device is capable of performing full monitor mode even during | |
559 | * normal operation. */ | |
560 | #define IEEE80211_HW_MONITOR_DURING_OPER (1<<9) | |
561 | ||
562 | /* Device does not need BSSID filter set to broadcast in order to | |
563 | * receive all probe responses while scanning */ | |
564 | #define IEEE80211_HW_NO_PROBE_FILTERING (1<<10) | |
565 | ||
566 | /* Channels are already configured to the default regulatory domain | |
567 | * specified in the device's EEPROM */ | |
568 | #define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11) | |
569 | ||
f0706e82 JB |
570 | /* Do TKIP phase1 key mixing in stack to support cards only do |
571 | * phase2 key mixing when doing hwcrypto */ | |
572 | #define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13) | |
573 | /* Do TKIP phase1 and phase2 key mixing in stack and send the generated | |
574 | * per-packet RC4 key with each TX frame when doing hwcrypto */ | |
575 | #define IEEE80211_HW_TKIP_REQ_PHASE2_KEY (1<<14) | |
576 | ||
577 | u32 flags; /* hardware flags defined above */ | |
578 | ||
579 | /* Set to the size of a needed device specific skb headroom for TX skbs. */ | |
580 | unsigned int extra_tx_headroom; | |
581 | ||
582 | /* This is the time in us to change channels | |
583 | */ | |
584 | int channel_change_time; | |
585 | /* Maximum values for various statistics. | |
586 | * Leave at 0 to indicate no support. Use negative numbers for dBm. */ | |
587 | s8 max_rssi; | |
588 | s8 max_signal; | |
589 | s8 max_noise; | |
590 | ||
591 | /* Number of available hardware TX queues for data packets. | |
592 | * WMM requires at least four queues. */ | |
593 | int queues; | |
594 | }; | |
595 | ||
596 | static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) | |
597 | { | |
598 | set_wiphy_dev(hw->wiphy, dev); | |
599 | } | |
600 | ||
601 | static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) | |
602 | { | |
603 | memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); | |
604 | } | |
605 | ||
606 | /* Configuration block used by the low-level driver to tell the 802.11 code | |
607 | * about supported hardware features and to pass function pointers to callback | |
608 | * functions. */ | |
609 | struct ieee80211_ops { | |
610 | /* Handler that 802.11 module calls for each transmitted frame. | |
611 | * skb contains the buffer starting from the IEEE 802.11 header. | |
612 | * The low-level driver should send the frame out based on | |
613 | * configuration in the TX control data. | |
614 | * Must be atomic. */ | |
615 | int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, | |
616 | struct ieee80211_tx_control *control); | |
617 | ||
f0706e82 JB |
618 | /* Handler that is called when any netdevice attached to the hardware |
619 | * device is set UP for the first time. This can be used, e.g., to | |
620 | * enable interrupts and beacon sending. */ | |
621 | int (*open)(struct ieee80211_hw *hw); | |
622 | ||
623 | /* Handler that is called when the last netdevice attached to the | |
624 | * hardware device is set DOWN. This can be used, e.g., to disable | |
625 | * interrupts and beacon sending. */ | |
626 | int (*stop)(struct ieee80211_hw *hw); | |
627 | ||
628 | /* Handler for asking a driver if a new interface can be added (or, | |
629 | * more exactly, set UP). If the handler returns zero, the interface | |
630 | * is added. Driver should perform any initialization it needs prior | |
631 | * to returning zero. By returning non-zero addition of the interface | |
632 | * is inhibited. Unless monitor_during_oper is set, it is guaranteed | |
633 | * that monitor interfaces and normal interfaces are mutually | |
4480f15c JB |
634 | * exclusive. If assigned, the open() handler is called after |
635 | * add_interface() if this is the first device added. The | |
636 | * add_interface() callback has to be assigned because it is the only | |
637 | * way to obtain the requested MAC address for any interface. | |
638 | */ | |
f0706e82 JB |
639 | int (*add_interface)(struct ieee80211_hw *hw, |
640 | struct ieee80211_if_init_conf *conf); | |
641 | ||
642 | /* Notify a driver that an interface is going down. The stop() handler | |
643 | * is called prior to this if this is a last interface. */ | |
644 | void (*remove_interface)(struct ieee80211_hw *hw, | |
645 | struct ieee80211_if_init_conf *conf); | |
646 | ||
647 | /* Handler for configuration requests. IEEE 802.11 code calls this | |
648 | * function to change hardware configuration, e.g., channel. */ | |
649 | int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); | |
650 | ||
651 | /* Handler for configuration requests related to interfaces (e.g. | |
652 | * BSSID). */ | |
653 | int (*config_interface)(struct ieee80211_hw *hw, | |
654 | int if_id, struct ieee80211_if_conf *conf); | |
655 | ||
656 | /* ieee80211 drivers do not have access to the &struct net_device | |
657 | * that is (are) connected with their device. Hence (and because | |
658 | * we need to combine the multicast lists and flags for multiple | |
659 | * virtual interfaces), they cannot assign set_multicast_list. | |
660 | * The parameters here replace dev->flags and dev->mc_count, | |
661 | * dev->mc_list is replaced by calling ieee80211_get_mc_list_item. | |
662 | * Must be atomic. */ | |
663 | void (*set_multicast_list)(struct ieee80211_hw *hw, | |
664 | unsigned short flags, int mc_count); | |
665 | ||
666 | /* Set TIM bit handler. If the hardware/firmware takes care of beacon | |
667 | * generation, IEEE 802.11 code uses this function to tell the | |
668 | * low-level to set (or clear if set==0) TIM bit for the given aid. If | |
669 | * host system is used to generate beacons, this handler is not used | |
670 | * and low-level driver should set it to NULL. | |
671 | * Must be atomic. */ | |
672 | int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); | |
673 | ||
8f20fc24 JB |
674 | /* |
675 | * Set encryption key. | |
676 | * | |
677 | * This is called to enable hardware acceleration of encryption and | |
678 | * decryption. The address will be the broadcast address for default | |
11a843b7 JB |
679 | * keys, the other station's hardware address for individual keys or |
680 | * the zero address for keys that will be used only for transmission. | |
681 | * | |
682 | * The local_address parameter will always be set to our own address, | |
683 | * this is only relevant if you support multiple local addresses. | |
684 | * | |
8f20fc24 JB |
685 | * When transmitting, the TX control data will use the hw_key_idx |
686 | * selected by the low-level driver. | |
11a843b7 JB |
687 | * |
688 | * Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it | |
689 | * couldn't be added; if you return 0 then hw_key_idx must be | |
690 | * assigned to something other than HW_KEY_IDX_INVALID. When the cmd | |
691 | * is DISABLE_KEY then it must succeed. | |
692 | * | |
7ac1bd6a JB |
693 | * Note that it is permissible to not decrypt a frame even if a key |
694 | * for it has been uploaded to hardware, the stack will not make any | |
695 | * decision based on whether a key has been uploaded or not but rather | |
696 | * based on the receive flags. | |
697 | * | |
11a843b7 JB |
698 | * This callback can sleep, and is only called between add_interface |
699 | * and remove_interface calls, i.e. while the interface with the | |
700 | * given local_address is enabled. | |
701 | * | |
702 | * The ieee80211_key_conf structure pointed to by the key parameter | |
703 | * is guaranteed to be valid until another call to set_key removes | |
704 | * it, but it can only be used as a cookie to differentiate keys. | |
8f20fc24 | 705 | */ |
f0706e82 | 706 | int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd, |
11a843b7 JB |
707 | const u8 *local_address, const u8 *address, |
708 | struct ieee80211_key_conf *key); | |
f0706e82 | 709 | |
f0706e82 JB |
710 | /* Enable/disable IEEE 802.1X. This item requests wlan card to pass |
711 | * unencrypted EAPOL-Key frames even when encryption is configured. | |
712 | * If the wlan card does not require such a configuration, this | |
713 | * function pointer can be set to NULL. */ | |
714 | int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x); | |
715 | ||
716 | /* Set port authorization state (IEEE 802.1X PAE) to be authorized | |
717 | * (authorized=1) or unauthorized (authorized=0). This function can be | |
718 | * used if the wlan hardware or low-level driver implements PAE. | |
719 | * 80211.o module will anyway filter frames based on authorization | |
720 | * state, so this function pointer can be NULL if low-level driver does | |
721 | * not require event notification about port state changes. | |
722 | * Currently unused. */ | |
723 | int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr, | |
724 | int authorized); | |
725 | ||
726 | /* Ask the hardware to service the scan request, no need to start | |
727 | * the scan state machine in stack. */ | |
728 | int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); | |
729 | ||
730 | /* return low-level statistics */ | |
731 | int (*get_stats)(struct ieee80211_hw *hw, | |
732 | struct ieee80211_low_level_stats *stats); | |
733 | ||
734 | /* For devices that generate their own beacons and probe response | |
735 | * or association responses this updates the state of privacy_invoked | |
736 | * returns 0 for success or an error number */ | |
737 | int (*set_privacy_invoked)(struct ieee80211_hw *hw, | |
738 | int privacy_invoked); | |
739 | ||
740 | /* For devices that have internal sequence counters, allow 802.11 | |
741 | * code to access the current value of a counter */ | |
742 | int (*get_sequence_counter)(struct ieee80211_hw *hw, | |
743 | u8* addr, u8 keyidx, u8 txrx, | |
744 | u32* iv32, u16* iv16); | |
745 | ||
746 | /* Configuration of RTS threshold (if device needs it) */ | |
747 | int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); | |
748 | ||
749 | /* Configuration of fragmentation threshold. | |
750 | * Assign this if the device does fragmentation by itself, | |
751 | * if this method is assigned then the stack will not do | |
752 | * fragmentation. */ | |
753 | int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); | |
754 | ||
755 | /* Configuration of retry limits (if device needs it) */ | |
756 | int (*set_retry_limit)(struct ieee80211_hw *hw, | |
757 | u32 short_retry, u32 long_retr); | |
758 | ||
759 | /* Number of STAs in STA table notification (NULL = disabled). | |
760 | * Must be atomic. */ | |
761 | void (*sta_table_notification)(struct ieee80211_hw *hw, | |
762 | int num_sta); | |
763 | ||
d9430a32 DD |
764 | /* Handle ERP IE change notifications. Must be atomic. */ |
765 | void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes, | |
766 | int cts_protection, int preamble); | |
767 | ||
768 | /* Flags for the erp_ie_changed changes parameter */ | |
769 | #define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */ | |
770 | #define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */ | |
771 | ||
f0706e82 JB |
772 | /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), |
773 | * bursting) for a hardware TX queue. | |
774 | * queue = IEEE80211_TX_QUEUE_*. | |
775 | * Must be atomic. */ | |
776 | int (*conf_tx)(struct ieee80211_hw *hw, int queue, | |
777 | const struct ieee80211_tx_queue_params *params); | |
778 | ||
779 | /* Get statistics of the current TX queue status. This is used to get | |
780 | * number of currently queued packets (queue length), maximum queue | |
781 | * size (limit), and total number of packets sent using each TX queue | |
782 | * (count). | |
783 | * Currently unused. */ | |
784 | int (*get_tx_stats)(struct ieee80211_hw *hw, | |
785 | struct ieee80211_tx_queue_stats *stats); | |
786 | ||
787 | /* Get the current TSF timer value from firmware/hardware. Currently, | |
788 | * this is only used for IBSS mode debugging and, as such, is not a | |
789 | * required function. | |
790 | * Must be atomic. */ | |
791 | u64 (*get_tsf)(struct ieee80211_hw *hw); | |
792 | ||
793 | /* Reset the TSF timer and allow firmware/hardware to synchronize with | |
794 | * other STAs in the IBSS. This is only used in IBSS mode. This | |
795 | * function is optional if the firmware/hardware takes full care of | |
796 | * TSF synchronization. */ | |
797 | void (*reset_tsf)(struct ieee80211_hw *hw); | |
798 | ||
799 | /* Setup beacon data for IBSS beacons. Unlike access point (Master), | |
800 | * IBSS uses a fixed beacon frame which is configured using this | |
801 | * function. This handler is required only for IBSS mode. */ | |
802 | int (*beacon_update)(struct ieee80211_hw *hw, | |
803 | struct sk_buff *skb, | |
804 | struct ieee80211_tx_control *control); | |
805 | ||
806 | /* Determine whether the last IBSS beacon was sent by us. This is | |
807 | * needed only for IBSS mode and the result of this function is used to | |
808 | * determine whether to reply to Probe Requests. */ | |
809 | int (*tx_last_beacon)(struct ieee80211_hw *hw); | |
810 | }; | |
811 | ||
812 | /* Allocate a new hardware device. This must be called once for each | |
813 | * hardware device. The returned pointer must be used to refer to this | |
814 | * device when calling other functions. 802.11 code allocates a private data | |
815 | * area for the low-level driver. The size of this area is given as | |
816 | * priv_data_len. | |
817 | */ | |
818 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
819 | const struct ieee80211_ops *ops); | |
820 | ||
821 | /* Register hardware device to the IEEE 802.11 code and kernel. Low-level | |
822 | * drivers must call this function before using any other IEEE 802.11 | |
823 | * function except ieee80211_register_hwmode. */ | |
824 | int ieee80211_register_hw(struct ieee80211_hw *hw); | |
825 | ||
826 | /* driver can use this and ieee80211_get_rx_led_name to get the | |
827 | * name of the registered LEDs after ieee80211_register_hw | |
828 | * was called. | |
829 | * This is useful to set the default trigger on the LED class | |
830 | * device that your driver should export for each LED the device | |
831 | * has, that way the default behaviour will be as expected but | |
832 | * the user can still change it/turn off the LED etc. | |
833 | */ | |
834 | #ifdef CONFIG_MAC80211_LEDS | |
835 | extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); | |
836 | extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); | |
837 | #endif | |
838 | static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) | |
839 | { | |
840 | #ifdef CONFIG_MAC80211_LEDS | |
841 | return __ieee80211_get_tx_led_name(hw); | |
842 | #else | |
843 | return NULL; | |
844 | #endif | |
845 | } | |
846 | ||
847 | static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) | |
848 | { | |
849 | #ifdef CONFIG_MAC80211_LEDS | |
850 | return __ieee80211_get_rx_led_name(hw); | |
851 | #else | |
852 | return NULL; | |
853 | #endif | |
854 | } | |
855 | ||
856 | /* Register a new hardware PHYMODE capability to the stack. */ | |
857 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
858 | struct ieee80211_hw_mode *mode); | |
859 | ||
860 | /* Unregister a hardware device. This function instructs 802.11 code to free | |
861 | * allocated resources and unregister netdevices from the kernel. */ | |
862 | void ieee80211_unregister_hw(struct ieee80211_hw *hw); | |
863 | ||
864 | /* Free everything that was allocated including private data of a driver. */ | |
865 | void ieee80211_free_hw(struct ieee80211_hw *hw); | |
866 | ||
867 | /* Receive frame callback function. The low-level driver uses this function to | |
868 | * send received frames to the IEEE 802.11 code. Receive buffer (skb) must | |
869 | * start with IEEE 802.11 header. */ | |
870 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
871 | struct ieee80211_rx_status *status); | |
872 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, | |
873 | struct sk_buff *skb, | |
874 | struct ieee80211_rx_status *status); | |
875 | ||
876 | /* Transmit status callback function. The low-level driver must call this | |
877 | * function to report transmit status for all the TX frames that had | |
878 | * req_tx_status set in the transmit control fields. In addition, this should | |
879 | * be called at least for all unicast frames to provide information for TX rate | |
880 | * control algorithm. In order to maintain all statistics, this function is | |
881 | * recommended to be called after each frame, including multicast/broadcast, is | |
882 | * sent. */ | |
883 | void ieee80211_tx_status(struct ieee80211_hw *hw, | |
884 | struct sk_buff *skb, | |
885 | struct ieee80211_tx_status *status); | |
886 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
887 | struct sk_buff *skb, | |
888 | struct ieee80211_tx_status *status); | |
889 | ||
890 | /** | |
891 | * ieee80211_beacon_get - beacon generation function | |
892 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
893 | * @if_id: interface ID from &struct ieee80211_if_init_conf. | |
894 | * @control: will be filled with information needed to send this beacon. | |
895 | * | |
896 | * If the beacon frames are generated by the host system (i.e., not in | |
897 | * hardware/firmware), the low-level driver uses this function to receive | |
898 | * the next beacon frame from the 802.11 code. The low-level is responsible | |
899 | * for calling this function before beacon data is needed (e.g., based on | |
900 | * hardware interrupt). Returned skb is used only once and low-level driver | |
901 | * is responsible of freeing it. | |
902 | */ | |
903 | struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, | |
904 | int if_id, | |
905 | struct ieee80211_tx_control *control); | |
906 | ||
907 | /** | |
908 | * ieee80211_rts_get - RTS frame generation function | |
909 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
7e9ed188 | 910 | * @if_id: interface ID from &struct ieee80211_if_init_conf. |
f0706e82 JB |
911 | * @frame: pointer to the frame that is going to be protected by the RTS. |
912 | * @frame_len: the frame length (in octets). | |
913 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
914 | * @rts: The buffer where to store the RTS frame. | |
915 | * | |
916 | * If the RTS frames are generated by the host system (i.e., not in | |
917 | * hardware/firmware), the low-level driver uses this function to receive | |
918 | * the next RTS frame from the 802.11 code. The low-level is responsible | |
919 | * for calling this function before and RTS frame is needed. | |
920 | */ | |
7e9ed188 | 921 | void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id, |
f0706e82 JB |
922 | const void *frame, size_t frame_len, |
923 | const struct ieee80211_tx_control *frame_txctl, | |
924 | struct ieee80211_rts *rts); | |
925 | ||
926 | /** | |
927 | * ieee80211_rts_duration - Get the duration field for an RTS frame | |
928 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
7e9ed188 | 929 | * @if_id: interface ID from &struct ieee80211_if_init_conf. |
f0706e82 JB |
930 | * @frame_len: the length of the frame that is going to be protected by the RTS. |
931 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
932 | * | |
933 | * If the RTS is generated in firmware, but the host system must provide | |
934 | * the duration field, the low-level driver uses this function to receive | |
935 | * the duration field value in little-endian byteorder. | |
936 | */ | |
7e9ed188 | 937 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id, |
f0706e82 JB |
938 | size_t frame_len, |
939 | const struct ieee80211_tx_control *frame_txctl); | |
940 | ||
941 | /** | |
942 | * ieee80211_ctstoself_get - CTS-to-self frame generation function | |
943 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
7e9ed188 | 944 | * @if_id: interface ID from &struct ieee80211_if_init_conf. |
f0706e82 JB |
945 | * @frame: pointer to the frame that is going to be protected by the CTS-to-self. |
946 | * @frame_len: the frame length (in octets). | |
947 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
948 | * @cts: The buffer where to store the CTS-to-self frame. | |
949 | * | |
950 | * If the CTS-to-self frames are generated by the host system (i.e., not in | |
951 | * hardware/firmware), the low-level driver uses this function to receive | |
952 | * the next CTS-to-self frame from the 802.11 code. The low-level is responsible | |
953 | * for calling this function before and CTS-to-self frame is needed. | |
954 | */ | |
7e9ed188 | 955 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id, |
f0706e82 JB |
956 | const void *frame, size_t frame_len, |
957 | const struct ieee80211_tx_control *frame_txctl, | |
958 | struct ieee80211_cts *cts); | |
959 | ||
960 | /** | |
961 | * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame | |
962 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
7e9ed188 | 963 | * @if_id: interface ID from &struct ieee80211_if_init_conf. |
f0706e82 JB |
964 | * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. |
965 | * @frame_txctl: &struct ieee80211_tx_control of the frame. | |
966 | * | |
967 | * If the CTS-to-self is generated in firmware, but the host system must provide | |
968 | * the duration field, the low-level driver uses this function to receive | |
969 | * the duration field value in little-endian byteorder. | |
970 | */ | |
7e9ed188 | 971 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id, |
f0706e82 JB |
972 | size_t frame_len, |
973 | const struct ieee80211_tx_control *frame_txctl); | |
974 | ||
975 | /** | |
976 | * ieee80211_generic_frame_duration - Calculate the duration field for a frame | |
977 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
7e9ed188 | 978 | * @if_id: interface ID from &struct ieee80211_if_init_conf. |
f0706e82 JB |
979 | * @frame_len: the length of the frame. |
980 | * @rate: the rate (in 100kbps) at which the frame is going to be transmitted. | |
981 | * | |
982 | * Calculate the duration field of some generic frame, given its | |
983 | * length and transmission rate (in 100kbps). | |
984 | */ | |
7e9ed188 | 985 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id, |
f0706e82 JB |
986 | size_t frame_len, |
987 | int rate); | |
988 | ||
989 | /** | |
990 | * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames | |
991 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
992 | * @if_id: interface ID from &struct ieee80211_if_init_conf. | |
993 | * @control: will be filled with information needed to send returned frame. | |
994 | * | |
995 | * Function for accessing buffered broadcast and multicast frames. If | |
996 | * hardware/firmware does not implement buffering of broadcast/multicast | |
997 | * frames when power saving is used, 802.11 code buffers them in the host | |
998 | * memory. The low-level driver uses this function to fetch next buffered | |
999 | * frame. In most cases, this is used when generating beacon frame. This | |
1000 | * function returns a pointer to the next buffered skb or NULL if no more | |
1001 | * buffered frames are available. | |
1002 | * | |
1003 | * Note: buffered frames are returned only after DTIM beacon frame was | |
1004 | * generated with ieee80211_beacon_get() and the low-level driver must thus | |
1005 | * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns | |
1006 | * NULL if the previous generated beacon was not DTIM, so the low-level driver | |
1007 | * does not need to check for DTIM beacons separately and should be able to | |
1008 | * use common code for all beacons. | |
1009 | */ | |
1010 | struct sk_buff * | |
1011 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, | |
1012 | struct ieee80211_tx_control *control); | |
1013 | ||
f0706e82 JB |
1014 | /* Given an sk_buff with a raw 802.11 header at the data pointer this function |
1015 | * returns the 802.11 header length in bytes (not including encryption | |
1016 | * headers). If the data in the sk_buff is too short to contain a valid 802.11 | |
1017 | * header the function returns 0. | |
1018 | */ | |
1019 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); | |
1020 | ||
1021 | /* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */ | |
1022 | int ieee80211_get_hdrlen(u16 fc); | |
1023 | ||
1024 | /** | |
1025 | * ieee80211_wake_queue - wake specific queue | |
1026 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1027 | * @queue: queue number (counted from zero). | |
1028 | * | |
1029 | * Drivers should use this function instead of netif_wake_queue. | |
1030 | */ | |
1031 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); | |
1032 | ||
1033 | /** | |
1034 | * ieee80211_stop_queue - stop specific queue | |
1035 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1036 | * @queue: queue number (counted from zero). | |
1037 | * | |
1038 | * Drivers should use this function instead of netif_stop_queue. | |
1039 | */ | |
1040 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); | |
1041 | ||
1042 | /** | |
1043 | * ieee80211_start_queues - start all queues | |
1044 | * @hw: pointer to as obtained from ieee80211_alloc_hw(). | |
1045 | * | |
1046 | * Drivers should use this function instead of netif_start_queue. | |
1047 | */ | |
1048 | void ieee80211_start_queues(struct ieee80211_hw *hw); | |
1049 | ||
1050 | /** | |
1051 | * ieee80211_stop_queues - stop all queues | |
1052 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1053 | * | |
1054 | * Drivers should use this function instead of netif_stop_queue. | |
1055 | */ | |
1056 | void ieee80211_stop_queues(struct ieee80211_hw *hw); | |
1057 | ||
1058 | /** | |
1059 | * ieee80211_wake_queues - wake all queues | |
1060 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1061 | * | |
1062 | * Drivers should use this function instead of netif_wake_queue. | |
1063 | */ | |
1064 | void ieee80211_wake_queues(struct ieee80211_hw *hw); | |
1065 | ||
1066 | /** | |
1067 | * ieee80211_get_mc_list_item - iteration over items in multicast list | |
1068 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1069 | * @prev: value returned by previous call to ieee80211_get_mc_list_item() or | |
1070 | * NULL to start a new iteration. | |
1071 | * @ptr: pointer to buffer of void * type for internal usage of | |
1072 | * ieee80211_get_mc_list_item(). | |
1073 | * | |
1074 | * Iterates over items in multicast list of given device. To get the first | |
1075 | * item, pass NULL in @prev and in *@ptr. In subsequent calls, pass the | |
1076 | * value returned by previous call in @prev. Don't alter *@ptr during | |
1077 | * iteration. When there are no more items, NULL is returned. | |
1078 | */ | |
1079 | struct dev_mc_list * | |
1080 | ieee80211_get_mc_list_item(struct ieee80211_hw *hw, | |
1081 | struct dev_mc_list *prev, | |
1082 | void **ptr); | |
1083 | ||
1084 | /* called by driver to notify scan status completed */ | |
1085 | void ieee80211_scan_completed(struct ieee80211_hw *hw); | |
1086 | ||
f0706e82 JB |
1087 | /* return a pointer to the source address (SA) */ |
1088 | static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) | |
1089 | { | |
1090 | u8 *raw = (u8 *) hdr; | |
1091 | u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ | |
1092 | ||
1093 | switch (tofrom) { | |
1094 | case 2: | |
1095 | return hdr->addr3; | |
1096 | case 3: | |
1097 | return hdr->addr4; | |
1098 | } | |
1099 | return hdr->addr2; | |
1100 | } | |
1101 | ||
1102 | /* return a pointer to the destination address (DA) */ | |
1103 | static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) | |
1104 | { | |
1105 | u8 *raw = (u8 *) hdr; | |
1106 | u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ | |
1107 | ||
1108 | if (to_ds) | |
1109 | return hdr->addr3; | |
1110 | return hdr->addr1; | |
1111 | } | |
1112 | ||
1113 | static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) | |
1114 | { | |
1115 | return (le16_to_cpu(hdr->frame_control) & | |
1116 | IEEE80211_FCTL_MOREFRAGS) != 0; | |
1117 | } | |
1118 | ||
1119 | #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x" | |
1120 | #define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \ | |
1121 | ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5] | |
1122 | ||
1123 | #endif /* MAC80211_H */ |