1 /*
2 * Wi-Fi Multimedia Admission Control (WMM-AC)
3 * Copyright(c) 2014, Intel Mobile Communication GmbH.
4 * Copyright(c) 2014, Intel Corporation. All rights reserved.
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "includes.h"
11
12 #include "utils/common.h"
13 #include "utils/list.h"
14 #include "utils/eloop.h"
15 #include "common/ieee802_11_common.h"
16 #include "wpa_supplicant_i.h"
17 #include "bss.h"
18 #include "driver_i.h"
19 #include "wmm_ac.h"
20
21 static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx);
22
23 static const enum wmm_ac up_to_ac[8] = {
24 WMM_AC_BK,
25 WMM_AC_BE,
26 WMM_AC_BE,
27 WMM_AC_BK,
28 WMM_AC_VI,
29 WMM_AC_VI,
30 WMM_AC_VO,
31 WMM_AC_VO
32 };
33
34
wmm_ac_get_tsid(const struct wmm_tspec_element * tspec)35 static inline u8 wmm_ac_get_tsid(const struct wmm_tspec_element *tspec)
36 {
37 return (tspec->ts_info[0] >> 1) & 0x0f;
38 }
39
40
wmm_ac_get_direction(const struct wmm_tspec_element * tspec)41 static u8 wmm_ac_get_direction(const struct wmm_tspec_element *tspec)
42 {
43 return (tspec->ts_info[0] >> 5) & 0x03;
44 }
45
46
wmm_ac_get_user_priority(const struct wmm_tspec_element * tspec)47 static u8 wmm_ac_get_user_priority(const struct wmm_tspec_element *tspec)
48 {
49 return (tspec->ts_info[1] >> 3) & 0x07;
50 }
51
52
wmm_ac_direction_to_idx(u8 direction)53 static u8 wmm_ac_direction_to_idx(u8 direction)
54 {
55 switch (direction) {
56 case WMM_AC_DIR_UPLINK:
57 return TS_DIR_IDX_UPLINK;
58 case WMM_AC_DIR_DOWNLINK:
59 return TS_DIR_IDX_DOWNLINK;
60 case WMM_AC_DIR_BIDIRECTIONAL:
61 return TS_DIR_IDX_BIDI;
62 default:
63 wpa_printf(MSG_ERROR, "Invalid direction: %d", direction);
64 return WMM_AC_DIR_UPLINK;
65 }
66 }
67
68
wmm_ac_add_ts(struct wpa_supplicant * wpa_s,const u8 * addr,const struct wmm_tspec_element * tspec)69 static int wmm_ac_add_ts(struct wpa_supplicant *wpa_s, const u8 *addr,
70 const struct wmm_tspec_element *tspec)
71 {
72 struct wmm_tspec_element *_tspec;
73 int ret;
74 u16 admitted_time = le_to_host16(tspec->medium_time);
75 u8 up = wmm_ac_get_user_priority(tspec);
76 u8 ac = up_to_ac[up];
77 u8 dir = wmm_ac_get_direction(tspec);
78 u8 tsid = wmm_ac_get_tsid(tspec);
79 enum ts_dir_idx idx = wmm_ac_direction_to_idx(dir);
80
81 /* should have been verified before, but double-check here */
82 if (wpa_s->tspecs[ac][idx]) {
83 wpa_printf(MSG_ERROR,
84 "WMM AC: tspec (ac=%d, dir=%d) already exists!",
85 ac, dir);
86 return -1;
87 }
88
89 /* copy tspec */
90 _tspec = os_memdup(tspec, sizeof(*_tspec));
91 if (!_tspec)
92 return -1;
93
94 if (dir != WMM_AC_DIR_DOWNLINK) {
95 ret = wpa_drv_add_ts(wpa_s, tsid, addr, up, admitted_time);
96 wpa_printf(MSG_DEBUG,
97 "WMM AC: Add TS: addr=" MACSTR
98 " TSID=%u admitted time=%u, ret=%d",
99 MAC2STR(addr), tsid, admitted_time, ret);
100 if (ret < 0) {
101 os_free(_tspec);
102 return -1;
103 }
104 }
105
106 wpa_s->tspecs[ac][idx] = _tspec;
107
108 wpa_printf(MSG_DEBUG, "Traffic stream was created successfully");
109
110 wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_ADDED
111 "tsid=%d addr=" MACSTR " admitted_time=%d",
112 tsid, MAC2STR(addr), admitted_time);
113
114 return 0;
115 }
116
117
wmm_ac_del_ts_idx(struct wpa_supplicant * wpa_s,u8 ac,enum ts_dir_idx dir)118 static void wmm_ac_del_ts_idx(struct wpa_supplicant *wpa_s, u8 ac,
119 enum ts_dir_idx dir)
120 {
121 struct wmm_tspec_element *tspec = wpa_s->tspecs[ac][dir];
122 u8 tsid;
123
124 if (!tspec)
125 return;
126
127 tsid = wmm_ac_get_tsid(tspec);
128 wpa_printf(MSG_DEBUG, "WMM AC: Del TS ac=%d tsid=%d", ac, tsid);
129
130 /* update the driver in case of uplink/bidi */
131 if (wmm_ac_get_direction(tspec) != WMM_AC_DIR_DOWNLINK)
132 wpa_drv_del_ts(wpa_s, tsid, wpa_s->bssid);
133
134 wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REMOVED
135 "tsid=%d addr=" MACSTR, tsid, MAC2STR(wpa_s->bssid));
136
137 os_free(wpa_s->tspecs[ac][dir]);
138 wpa_s->tspecs[ac][dir] = NULL;
139 }
140
141
wmm_ac_del_req(struct wpa_supplicant * wpa_s,int failed)142 static void wmm_ac_del_req(struct wpa_supplicant *wpa_s, int failed)
143 {
144 struct wmm_ac_addts_request *req = wpa_s->addts_request;
145
146 if (!req)
147 return;
148
149 if (failed)
150 wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED
151 "tsid=%u", wmm_ac_get_tsid(&req->tspec));
152
153 eloop_cancel_timeout(wmm_ac_addts_req_timeout, wpa_s, req);
154 wpa_s->addts_request = NULL;
155 os_free(req);
156 }
157
158
wmm_ac_addts_req_timeout(void * eloop_ctx,void * timeout_ctx)159 static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx)
160 {
161 struct wpa_supplicant *wpa_s = eloop_ctx;
162 struct wmm_ac_addts_request *addts_req = timeout_ctx;
163
164 wpa_printf(MSG_DEBUG,
165 "Timeout getting ADDTS response (tsid=%d up=%d)",
166 wmm_ac_get_tsid(&addts_req->tspec),
167 wmm_ac_get_user_priority(&addts_req->tspec));
168
169 wmm_ac_del_req(wpa_s, 1);
170 }
171
172
wmm_ac_send_addts_request(struct wpa_supplicant * wpa_s,const struct wmm_ac_addts_request * req)173 static int wmm_ac_send_addts_request(struct wpa_supplicant *wpa_s,
174 const struct wmm_ac_addts_request *req)
175 {
176 struct wpabuf *buf;
177 int ret;
178
179 wpa_printf(MSG_DEBUG, "Sending ADDTS Request to " MACSTR,
180 MAC2STR(req->address));
181
182 /* category + action code + dialog token + status + sizeof(tspec) */
183 buf = wpabuf_alloc(4 + sizeof(req->tspec));
184 if (!buf) {
185 wpa_printf(MSG_ERROR, "WMM AC: Allocation error");
186 return -1;
187 }
188
189 wpabuf_put_u8(buf, WLAN_ACTION_WMM);
190 wpabuf_put_u8(buf, WMM_ACTION_CODE_ADDTS_REQ);
191 wpabuf_put_u8(buf, req->dialog_token);
192 wpabuf_put_u8(buf, 0); /* status code */
193 wpabuf_put_data(buf, &req->tspec, sizeof(req->tspec));
194
195 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, req->address,
196 wpa_s->own_addr, wpa_s->bssid,
197 wpabuf_head(buf), wpabuf_len(buf), 0);
198 if (ret) {
199 wpa_printf(MSG_WARNING,
200 "WMM AC: Failed to send ADDTS Request");
201 }
202
203 wpabuf_free(buf);
204 return ret;
205 }
206
207
wmm_ac_send_delts(struct wpa_supplicant * wpa_s,const struct wmm_tspec_element * tspec,const u8 * address)208 static int wmm_ac_send_delts(struct wpa_supplicant *wpa_s,
209 const struct wmm_tspec_element *tspec,
210 const u8 *address)
211 {
212 struct wpabuf *buf;
213 int ret;
214
215 /* category + action code + dialog token + status + sizeof(tspec) */
216 buf = wpabuf_alloc(4 + sizeof(*tspec));
217 if (!buf)
218 return -1;
219
220 wpa_printf(MSG_DEBUG, "Sending DELTS to " MACSTR, MAC2STR(address));
221
222 /* category + action code + dialog token + status + sizeof(tspec) */
223 wpabuf_put_u8(buf, WLAN_ACTION_WMM);
224 wpabuf_put_u8(buf, WMM_ACTION_CODE_DELTS);
225 wpabuf_put_u8(buf, 0); /* Dialog Token (not used) */
226 wpabuf_put_u8(buf, 0); /* Status Code (not used) */
227 wpabuf_put_data(buf, tspec, sizeof(*tspec));
228
229 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, address,
230 wpa_s->own_addr, wpa_s->bssid,
231 wpabuf_head(buf), wpabuf_len(buf), 0);
232 if (ret)
233 wpa_printf(MSG_WARNING, "Failed to send DELTS frame");
234
235 wpabuf_free(buf);
236 return ret;
237 }
238
239
240 /* return the AC using the given TSPEC tid */
wmm_ac_find_tsid(struct wpa_supplicant * wpa_s,u8 tsid,enum ts_dir_idx * dir)241 static int wmm_ac_find_tsid(struct wpa_supplicant *wpa_s, u8 tsid,
242 enum ts_dir_idx *dir)
243 {
244 int ac;
245 enum ts_dir_idx idx;
246
247 for (ac = 0; ac < WMM_AC_NUM; ac++) {
248 for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
249 if (wpa_s->tspecs[ac][idx] &&
250 wmm_ac_get_tsid(wpa_s->tspecs[ac][idx]) == tsid) {
251 if (dir)
252 *dir = idx;
253 return ac;
254 }
255 }
256 }
257
258 return -1;
259 }
260
261
262 static struct wmm_ac_addts_request *
wmm_ac_build_addts_req(struct wpa_supplicant * wpa_s,const struct wmm_ac_ts_setup_params * params,const u8 * address)263 wmm_ac_build_addts_req(struct wpa_supplicant *wpa_s,
264 const struct wmm_ac_ts_setup_params *params,
265 const u8 *address)
266 {
267 struct wmm_ac_addts_request *addts_req;
268 struct wmm_tspec_element *tspec;
269 u8 ac = up_to_ac[params->user_priority];
270 u8 uapsd = wpa_s->wmm_ac_assoc_info->ac_params[ac].uapsd;
271
272 addts_req = os_zalloc(sizeof(*addts_req));
273 if (!addts_req)
274 return NULL;
275
276 tspec = &addts_req->tspec;
277 os_memcpy(addts_req->address, address, ETH_ALEN);
278
279 /* The dialog token cannot be zero */
280 if (++wpa_s->wmm_ac_last_dialog_token == 0)
281 wpa_s->wmm_ac_last_dialog_token++;
282
283 addts_req->dialog_token = wpa_s->wmm_ac_last_dialog_token;
284 tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
285 tspec->length = sizeof(*tspec) - 2; /* reduce eid and length */
286 tspec->oui[0] = 0x00;
287 tspec->oui[1] = 0x50;
288 tspec->oui[2] = 0xf2;
289 tspec->oui_type = WMM_OUI_TYPE;
290 tspec->oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT;
291 tspec->version = WMM_VERSION;
292
293 tspec->ts_info[0] = params->tsid << 1;
294 tspec->ts_info[0] |= params->direction << 5;
295 tspec->ts_info[0] |= WMM_AC_ACCESS_POLICY_EDCA << 7;
296 tspec->ts_info[1] = uapsd << 2;
297 tspec->ts_info[1] |= params->user_priority << 3;
298 tspec->ts_info[2] = 0;
299
300 tspec->nominal_msdu_size = host_to_le16(params->nominal_msdu_size);
301 if (params->fixed_nominal_msdu)
302 tspec->nominal_msdu_size |=
303 host_to_le16(WMM_AC_FIXED_MSDU_SIZE);
304
305 tspec->mean_data_rate = host_to_le32(params->mean_data_rate);
306 tspec->minimum_phy_rate = host_to_le32(params->minimum_phy_rate);
307 tspec->surplus_bandwidth_allowance =
308 host_to_le16(params->surplus_bandwidth_allowance);
309
310 return addts_req;
311 }
312
313
param_in_range(const char * name,long value,long min_val,long max_val)314 static int param_in_range(const char *name, long value,
315 long min_val, long max_val)
316 {
317 if (value < min_val || (max_val >= 0 && value > max_val)) {
318 wpa_printf(MSG_DEBUG,
319 "WMM AC: param %s (%ld) is out of range (%ld-%ld)",
320 name, value, min_val, max_val);
321 return 0;
322 }
323
324 return 1;
325 }
326
327
wmm_ac_should_replace_ts(struct wpa_supplicant * wpa_s,u8 tsid,u8 ac,u8 dir)328 static int wmm_ac_should_replace_ts(struct wpa_supplicant *wpa_s,
329 u8 tsid, u8 ac, u8 dir)
330 {
331 enum ts_dir_idx idx;
332 int cur_ac, existing_ts = 0, replace_ts = 0;
333
334 cur_ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
335 if (cur_ac >= 0) {
336 if (cur_ac != ac) {
337 wpa_printf(MSG_DEBUG,
338 "WMM AC: TSID %i already exists on different ac (%d)",
339 tsid, cur_ac);
340 return -1;
341 }
342
343 /* same tsid - this tspec will replace the current one */
344 replace_ts |= BIT(idx);
345 }
346
347 for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
348 if (wpa_s->tspecs[ac][idx])
349 existing_ts |= BIT(idx);
350 }
351
352 switch (dir) {
353 case WMM_AC_DIR_UPLINK:
354 /* replace existing uplink/bidi tspecs */
355 replace_ts |= existing_ts & (BIT(TS_DIR_IDX_UPLINK) |
356 BIT(TS_DIR_IDX_BIDI));
357 break;
358 case WMM_AC_DIR_DOWNLINK:
359 /* replace existing downlink/bidi tspecs */
360 replace_ts |= existing_ts & (BIT(TS_DIR_IDX_DOWNLINK) |
361 BIT(TS_DIR_IDX_BIDI));
362 break;
363 case WMM_AC_DIR_BIDIRECTIONAL:
364 /* replace all existing tspecs */
365 replace_ts |= existing_ts;
366 break;
367 default:
368 return -1;
369 }
370
371 return replace_ts;
372 }
373
374
wmm_ac_ts_req_is_valid(struct wpa_supplicant * wpa_s,const struct wmm_ac_ts_setup_params * params)375 static int wmm_ac_ts_req_is_valid(struct wpa_supplicant *wpa_s,
376 const struct wmm_ac_ts_setup_params *params)
377 {
378 enum wmm_ac req_ac;
379
380 #define PARAM_IN_RANGE(field, min_value, max_value) \
381 param_in_range(#field, params->field, min_value, max_value)
382
383 if (!PARAM_IN_RANGE(tsid, 0, WMM_AC_MAX_TID) ||
384 !PARAM_IN_RANGE(user_priority, 0, WMM_AC_MAX_USER_PRIORITY) ||
385 !PARAM_IN_RANGE(nominal_msdu_size, 1, WMM_AC_MAX_NOMINAL_MSDU) ||
386 !PARAM_IN_RANGE(mean_data_rate, 1, -1) ||
387 !PARAM_IN_RANGE(minimum_phy_rate, 1, -1) ||
388 !PARAM_IN_RANGE(surplus_bandwidth_allowance, WMM_AC_MIN_SBA_UNITY,
389 -1))
390 return 0;
391 #undef PARAM_IN_RANGE
392
393 if (!(params->direction == WMM_TSPEC_DIRECTION_UPLINK ||
394 params->direction == WMM_TSPEC_DIRECTION_DOWNLINK ||
395 params->direction == WMM_TSPEC_DIRECTION_BI_DIRECTIONAL)) {
396 wpa_printf(MSG_DEBUG, "WMM AC: invalid TS direction: %d",
397 params->direction);
398 return 0;
399 }
400
401 req_ac = up_to_ac[params->user_priority];
402
403 /* Requested accesss category must have acm */
404 if (!wpa_s->wmm_ac_assoc_info->ac_params[req_ac].acm) {
405 wpa_printf(MSG_DEBUG, "WMM AC: AC %d is not ACM", req_ac);
406 return 0;
407 }
408
409 if (wmm_ac_should_replace_ts(wpa_s, params->tsid, req_ac,
410 params->direction) < 0)
411 return 0;
412
413 return 1;
414 }
415
416
417 static struct wmm_ac_assoc_data *
wmm_ac_process_param_elem(struct wpa_supplicant * wpa_s,const u8 * ies,size_t ies_len)418 wmm_ac_process_param_elem(struct wpa_supplicant *wpa_s, const u8 *ies,
419 size_t ies_len)
420 {
421 struct ieee802_11_elems elems;
422 struct wmm_parameter_element *wmm_params;
423 struct wmm_ac_assoc_data *assoc_data;
424 int i;
425
426 /* Parsing WMM Parameter Element */
427 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
428 wpa_printf(MSG_DEBUG, "WMM AC: could not parse assoc ies");
429 return NULL;
430 }
431
432 if (!elems.wmm) {
433 wpa_printf(MSG_DEBUG, "WMM AC: No WMM IE");
434 return NULL;
435 }
436
437 if (elems.wmm_len != sizeof(*wmm_params)) {
438 wpa_printf(MSG_DEBUG, "WMM AC: Invalid WMM ie length");
439 return NULL;
440 }
441
442 wmm_params = (struct wmm_parameter_element *)(elems.wmm);
443
444 assoc_data = os_zalloc(sizeof(*assoc_data));
445 if (!assoc_data)
446 return NULL;
447
448 for (i = 0; i < WMM_AC_NUM; i++)
449 assoc_data->ac_params[i].acm =
450 !!(wmm_params->ac[i].aci_aifsn & WMM_AC_ACM);
451
452 wpa_printf(MSG_DEBUG,
453 "WMM AC: AC mandatory: AC_BE=%u AC_BK=%u AC_VI=%u AC_VO=%u",
454 assoc_data->ac_params[WMM_AC_BE].acm,
455 assoc_data->ac_params[WMM_AC_BK].acm,
456 assoc_data->ac_params[WMM_AC_VI].acm,
457 assoc_data->ac_params[WMM_AC_VO].acm);
458
459 return assoc_data;
460 }
461
462
wmm_ac_init(struct wpa_supplicant * wpa_s,const u8 * ies,size_t ies_len,const struct wmm_params * wmm_params)463 static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
464 size_t ies_len, const struct wmm_params *wmm_params)
465 {
466 struct wmm_ac_assoc_data *assoc_data;
467 u8 ac;
468
469 if (wpa_s->wmm_ac_assoc_info) {
470 wpa_printf(MSG_ERROR, "WMM AC: Already initialized");
471 return -1;
472 }
473
474 if (!ies || !(wmm_params->info_bitmap & WMM_PARAMS_UAPSD_QUEUES_INFO)) {
475 /* WMM AC not in use for this connection */
476 return -1;
477 }
478
479 os_memset(wpa_s->tspecs, 0, sizeof(wpa_s->tspecs));
480 wpa_s->wmm_ac_last_dialog_token = 0;
481 wpa_s->addts_request = NULL;
482
483 assoc_data = wmm_ac_process_param_elem(wpa_s, ies, ies_len);
484 if (!assoc_data)
485 return -1;
486
487 wpa_printf(MSG_DEBUG, "WMM AC: U-APSD queues=0x%x",
488 wmm_params->uapsd_queues);
489
490 for (ac = 0; ac < WMM_AC_NUM; ac++) {
491 assoc_data->ac_params[ac].uapsd =
492 !!(wmm_params->uapsd_queues & BIT(ac));
493 }
494
495 wpa_s->wmm_ac_assoc_info = assoc_data;
496 return 0;
497 }
498
499
wmm_ac_del_ts(struct wpa_supplicant * wpa_s,u8 ac,int dir_bitmap)500 static void wmm_ac_del_ts(struct wpa_supplicant *wpa_s, u8 ac, int dir_bitmap)
501 {
502 enum ts_dir_idx idx;
503
504 for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
505 if (!(dir_bitmap & BIT(idx)))
506 continue;
507
508 wmm_ac_del_ts_idx(wpa_s, ac, idx);
509 }
510 }
511
512
wmm_ac_deinit(struct wpa_supplicant * wpa_s)513 static void wmm_ac_deinit(struct wpa_supplicant *wpa_s)
514 {
515 int i;
516
517 for (i = 0; i < WMM_AC_NUM; i++)
518 wmm_ac_del_ts(wpa_s, i, TS_DIR_IDX_ALL);
519
520 /* delete pending add_ts request */
521 wmm_ac_del_req(wpa_s, 1);
522
523 os_free(wpa_s->wmm_ac_assoc_info);
524 wpa_s->wmm_ac_assoc_info = NULL;
525 }
526
527
wmm_ac_notify_assoc(struct wpa_supplicant * wpa_s,const u8 * ies,size_t ies_len,const struct wmm_params * wmm_params)528 void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
529 size_t ies_len, const struct wmm_params *wmm_params)
530 {
531 if (wmm_ac_init(wpa_s, ies, ies_len, wmm_params))
532 return;
533
534 wpa_printf(MSG_DEBUG,
535 "WMM AC: Valid WMM association, WMM AC is enabled");
536 }
537
538
wmm_ac_notify_disassoc(struct wpa_supplicant * wpa_s)539 void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s)
540 {
541 if (!wpa_s->wmm_ac_assoc_info)
542 return;
543
544 wmm_ac_deinit(wpa_s);
545 wpa_printf(MSG_DEBUG, "WMM AC: WMM AC is disabled");
546 }
547
548
wpas_wmm_ac_delts(struct wpa_supplicant * wpa_s,u8 tsid)549 int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid)
550 {
551 struct wmm_tspec_element tspec;
552 int ac;
553 enum ts_dir_idx dir;
554
555 if (!wpa_s->wmm_ac_assoc_info) {
556 wpa_printf(MSG_DEBUG,
557 "WMM AC: Failed to delete TS, WMM AC is disabled");
558 return -1;
559 }
560
561 ac = wmm_ac_find_tsid(wpa_s, tsid, &dir);
562 if (ac < 0) {
563 wpa_printf(MSG_DEBUG, "WMM AC: TS does not exist");
564 return -1;
565 }
566
567 tspec = *wpa_s->tspecs[ac][dir];
568
569 wmm_ac_del_ts_idx(wpa_s, ac, dir);
570
571 wmm_ac_send_delts(wpa_s, &tspec, wpa_s->bssid);
572
573 return 0;
574 }
575
576
wpas_wmm_ac_addts(struct wpa_supplicant * wpa_s,struct wmm_ac_ts_setup_params * params)577 int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
578 struct wmm_ac_ts_setup_params *params)
579 {
580 struct wmm_ac_addts_request *addts_req;
581
582 if (!wpa_s->wmm_ac_assoc_info) {
583 wpa_printf(MSG_DEBUG,
584 "WMM AC: Cannot add TS - missing assoc data");
585 return -1;
586 }
587
588 if (wpa_s->addts_request) {
589 wpa_printf(MSG_DEBUG,
590 "WMM AC: can't add TS - ADDTS request is already pending");
591 return -1;
592 }
593
594 /*
595 * we can setup downlink TS even without driver support.
596 * however, we need driver support for the other directions.
597 */
598 if (params->direction != WMM_AC_DIR_DOWNLINK &&
599 !wpa_s->wmm_ac_supported) {
600 wpa_printf(MSG_DEBUG,
601 "Cannot set uplink/bidi TS without driver support");
602 return -1;
603 }
604
605 if (!wmm_ac_ts_req_is_valid(wpa_s, params))
606 return -1;
607
608 wpa_printf(MSG_DEBUG, "WMM AC: TS setup request (addr=" MACSTR
609 " tsid=%u user priority=%u direction=%d)",
610 MAC2STR(wpa_s->bssid), params->tsid,
611 params->user_priority, params->direction);
612
613 addts_req = wmm_ac_build_addts_req(wpa_s, params, wpa_s->bssid);
614 if (!addts_req)
615 return -1;
616
617 if (wmm_ac_send_addts_request(wpa_s, addts_req))
618 goto err;
619
620 /* save as pending and set ADDTS resp timeout to 1 second */
621 wpa_s->addts_request = addts_req;
622 eloop_register_timeout(1, 0, wmm_ac_addts_req_timeout,
623 wpa_s, addts_req);
624 return 0;
625 err:
626 os_free(addts_req);
627 return -1;
628 }
629
630
wmm_ac_handle_delts(struct wpa_supplicant * wpa_s,const u8 * sa,const struct wmm_tspec_element * tspec)631 static void wmm_ac_handle_delts(struct wpa_supplicant *wpa_s, const u8 *sa,
632 const struct wmm_tspec_element *tspec)
633 {
634 int ac;
635 u8 tsid;
636 enum ts_dir_idx idx;
637
638 tsid = wmm_ac_get_tsid(tspec);
639
640 wpa_printf(MSG_DEBUG,
641 "WMM AC: DELTS frame has been received TSID=%u addr="
642 MACSTR, tsid, MAC2STR(sa));
643
644 ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
645 if (ac < 0) {
646 wpa_printf(MSG_DEBUG,
647 "WMM AC: Ignoring DELTS frame - TSID does not exist");
648 return;
649 }
650
651 wmm_ac_del_ts_idx(wpa_s, ac, idx);
652
653 wpa_printf(MSG_DEBUG,
654 "TS was deleted successfully (tsid=%u address=" MACSTR ")",
655 tsid, MAC2STR(sa));
656 }
657
658
wmm_ac_handle_addts_resp(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 resp_dialog_token,const u8 status_code,const struct wmm_tspec_element * tspec)659 static void wmm_ac_handle_addts_resp(struct wpa_supplicant *wpa_s, const u8 *sa,
660 const u8 resp_dialog_token, const u8 status_code,
661 const struct wmm_tspec_element *tspec)
662 {
663 struct wmm_ac_addts_request *req = wpa_s->addts_request;
664 u8 ac, tsid, up, dir;
665 int replace_tspecs;
666
667 tsid = wmm_ac_get_tsid(tspec);
668 dir = wmm_ac_get_direction(tspec);
669 up = wmm_ac_get_user_priority(tspec);
670 ac = up_to_ac[up];
671
672 /* make sure we have a matching addts request */
673 if (!req || req->dialog_token != resp_dialog_token) {
674 wpa_printf(MSG_DEBUG,
675 "WMM AC: no req with dialog=%u, ignoring frame",
676 resp_dialog_token);
677 return;
678 }
679
680 /* make sure the params are the same */
681 if (os_memcmp(req->address, sa, ETH_ALEN) != 0 ||
682 tsid != wmm_ac_get_tsid(&req->tspec) ||
683 up != wmm_ac_get_user_priority(&req->tspec) ||
684 dir != wmm_ac_get_direction(&req->tspec)) {
685 wpa_printf(MSG_DEBUG,
686 "WMM AC: ADDTS params do not match, ignoring frame");
687 return;
688 }
689
690 /* delete pending request */
691 wmm_ac_del_req(wpa_s, 0);
692
693 wpa_printf(MSG_DEBUG,
694 "ADDTS response status=%d tsid=%u up=%u direction=%u",
695 status_code, tsid, up, dir);
696
697 if (status_code != WMM_ADDTS_STATUS_ADMISSION_ACCEPTED) {
698 wpa_printf(MSG_INFO, "WMM AC: ADDTS request was rejected");
699 goto err_msg;
700 }
701
702 replace_tspecs = wmm_ac_should_replace_ts(wpa_s, tsid, ac, dir);
703 if (replace_tspecs < 0)
704 goto err_delts;
705
706 wpa_printf(MSG_DEBUG, "ts idx replace bitmap: 0x%x", replace_tspecs);
707
708 /* when replacing tspecs - delete first */
709 wmm_ac_del_ts(wpa_s, ac, replace_tspecs);
710
711 /* Creating a new traffic stream */
712 wpa_printf(MSG_DEBUG,
713 "WMM AC: adding a new TS with TSID=%u address="MACSTR
714 " medium time=%u access category=%d dir=%d ",
715 tsid, MAC2STR(sa),
716 le_to_host16(tspec->medium_time), ac, dir);
717
718 if (wmm_ac_add_ts(wpa_s, sa, tspec))
719 goto err_delts;
720
721 return;
722
723 err_delts:
724 /* ask the ap to delete the tspec */
725 wmm_ac_send_delts(wpa_s, tspec, sa);
726 err_msg:
727 wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED "tsid=%u",
728 tsid);
729 }
730
731
wmm_ac_rx_action(struct wpa_supplicant * wpa_s,const u8 * da,const u8 * sa,const u8 * data,size_t len)732 void wmm_ac_rx_action(struct wpa_supplicant *wpa_s, const u8 *da,
733 const u8 *sa, const u8 *data, size_t len)
734 {
735 u8 action;
736 u8 dialog_token;
737 u8 status_code;
738 struct ieee802_11_elems elems;
739 struct wmm_tspec_element *tspec;
740
741 if (wpa_s->wmm_ac_assoc_info == NULL) {
742 wpa_printf(MSG_DEBUG,
743 "WMM AC: WMM AC is disabled, ignoring action frame");
744 return;
745 }
746
747 action = data[0];
748
749 if (action != WMM_ACTION_CODE_ADDTS_RESP &&
750 action != WMM_ACTION_CODE_DELTS) {
751 wpa_printf(MSG_DEBUG,
752 "WMM AC: Unknown action (%d), ignoring action frame",
753 action);
754 return;
755 }
756
757 /* WMM AC action frame */
758 if (os_memcmp(da, wpa_s->own_addr, ETH_ALEN) != 0) {
759 wpa_printf(MSG_DEBUG, "WMM AC: frame destination addr="MACSTR
760 " is other than ours, ignoring frame", MAC2STR(da));
761 return;
762 }
763
764 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
765 wpa_printf(MSG_DEBUG, "WMM AC: ignore frame with sa " MACSTR
766 " different other than our bssid", MAC2STR(da));
767 return;
768 }
769
770 if (len < 2 + sizeof(struct wmm_tspec_element)) {
771 wpa_printf(MSG_DEBUG,
772 "WMM AC: Short ADDTS response ignored (len=%lu)",
773 (unsigned long) len);
774 return;
775 }
776
777 data++;
778 len--;
779 dialog_token = data[0];
780 status_code = data[1];
781
782 if (ieee802_11_parse_elems(data + 2, len - 2, &elems, 1) != ParseOK) {
783 wpa_printf(MSG_DEBUG,
784 "WMM AC: Could not parse WMM AC action from " MACSTR,
785 MAC2STR(sa));
786 return;
787 }
788
789 /* the struct also contains the type and value, so decrease it */
790 if (elems.wmm_tspec_len != sizeof(struct wmm_tspec_element) - 2) {
791 wpa_printf(MSG_DEBUG, "WMM AC: missing or wrong length TSPEC");
792 return;
793 }
794
795 tspec = (struct wmm_tspec_element *)(elems.wmm_tspec - 2);
796
797 wpa_printf(MSG_DEBUG, "WMM AC: RX WMM AC Action from " MACSTR,
798 MAC2STR(sa));
799 wpa_hexdump(MSG_MSGDUMP, "WMM AC: WMM AC Action content", data, len);
800
801 switch (action) {
802 case WMM_ACTION_CODE_ADDTS_RESP:
803 wmm_ac_handle_addts_resp(wpa_s, sa, dialog_token, status_code,
804 tspec);
805 break;
806 case WMM_ACTION_CODE_DELTS:
807 wmm_ac_handle_delts(wpa_s, sa, tspec);
808 break;
809 default:
810 break;
811 }
812 }
813
814
get_ac_str(u8 ac)815 static const char * get_ac_str(u8 ac)
816 {
817 switch (ac) {
818 case WMM_AC_BE:
819 return "BE";
820 case WMM_AC_BK:
821 return "BK";
822 case WMM_AC_VI:
823 return "VI";
824 case WMM_AC_VO:
825 return "VO";
826 default:
827 return "N/A";
828 }
829 }
830
831
get_direction_str(u8 direction)832 static const char * get_direction_str(u8 direction)
833 {
834 switch (direction) {
835 case WMM_AC_DIR_DOWNLINK:
836 return "Downlink";
837 case WMM_AC_DIR_UPLINK:
838 return "Uplink";
839 case WMM_AC_DIR_BIDIRECTIONAL:
840 return "Bi-directional";
841 default:
842 return "N/A";
843 }
844 }
845
846
wpas_wmm_ac_status(struct wpa_supplicant * wpa_s,char * buf,size_t buflen)847 int wpas_wmm_ac_status(struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
848 {
849 struct wmm_ac_assoc_data *assoc_info = wpa_s->wmm_ac_assoc_info;
850 enum ts_dir_idx idx;
851 int pos = 0;
852 u8 ac, up;
853
854 if (!assoc_info) {
855 return wpa_scnprintf(buf, buflen - pos,
856 "Not associated to a WMM AP, WMM AC is Disabled\n");
857 }
858
859 pos += wpa_scnprintf(buf + pos, buflen - pos, "WMM AC is Enabled\n");
860
861 for (ac = 0; ac < WMM_AC_NUM; ac++) {
862 int ts_count = 0;
863
864 pos += wpa_scnprintf(buf + pos, buflen - pos,
865 "%s: acm=%d uapsd=%d\n",
866 get_ac_str(ac),
867 assoc_info->ac_params[ac].acm,
868 assoc_info->ac_params[ac].uapsd);
869
870 for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
871 struct wmm_tspec_element *tspec;
872 u8 dir, tsid;
873 const char *dir_str;
874
875 tspec = wpa_s->tspecs[ac][idx];
876 if (!tspec)
877 continue;
878
879 ts_count++;
880
881 dir = wmm_ac_get_direction(tspec);
882 dir_str = get_direction_str(dir);
883 tsid = wmm_ac_get_tsid(tspec);
884 up = wmm_ac_get_user_priority(tspec);
885
886 pos += wpa_scnprintf(buf + pos, buflen - pos,
887 "\tTSID=%u UP=%u\n"
888 "\tAddress = "MACSTR"\n"
889 "\tWMM AC dir = %s\n"
890 "\tTotal admitted time = %u\n\n",
891 tsid, up,
892 MAC2STR(wpa_s->bssid),
893 dir_str,
894 le_to_host16(tspec->medium_time));
895 }
896
897 if (!ts_count) {
898 pos += wpa_scnprintf(buf + pos, buflen - pos,
899 "\t(No Traffic Stream)\n\n");
900 }
901 }
902
903 return pos;
904 }
905
906
wmm_ac_get_tspecs_count(struct wpa_supplicant * wpa_s)907 static u8 wmm_ac_get_tspecs_count(struct wpa_supplicant *wpa_s)
908 {
909 int ac, dir, tspecs_count = 0;
910
911 for (ac = 0; ac < WMM_AC_NUM; ac++) {
912 for (dir = 0; dir < TS_DIR_IDX_COUNT; dir++) {
913 if (wpa_s->tspecs[ac][dir])
914 tspecs_count++;
915 }
916 }
917
918 return tspecs_count;
919 }
920
921
wmm_ac_save_tspecs(struct wpa_supplicant * wpa_s)922 void wmm_ac_save_tspecs(struct wpa_supplicant *wpa_s)
923 {
924 int ac, dir, tspecs_count;
925
926 wpa_printf(MSG_DEBUG, "WMM AC: Save last configured tspecs");
927
928 if (!wpa_s->wmm_ac_assoc_info)
929 return;
930
931 tspecs_count = wmm_ac_get_tspecs_count(wpa_s);
932 if (!tspecs_count) {
933 wpa_printf(MSG_DEBUG, "WMM AC: No configured TSPECs");
934 return;
935 }
936
937 wpa_printf(MSG_DEBUG, "WMM AC: Saving tspecs");
938
939 wmm_ac_clear_saved_tspecs(wpa_s);
940 wpa_s->last_tspecs = os_calloc(tspecs_count,
941 sizeof(*wpa_s->last_tspecs));
942 if (!wpa_s->last_tspecs) {
943 wpa_printf(MSG_ERROR, "WMM AC: Failed to save tspecs!");
944 return;
945 }
946
947 for (ac = 0; ac < WMM_AC_NUM; ac++) {
948 for (dir = 0; dir < TS_DIR_IDX_COUNT; dir++) {
949 if (!wpa_s->tspecs[ac][dir])
950 continue;
951
952 wpa_s->last_tspecs[wpa_s->last_tspecs_count++] =
953 *wpa_s->tspecs[ac][dir];
954 }
955 }
956
957 wpa_printf(MSG_DEBUG, "WMM AC: Successfully saved %d TSPECs",
958 wpa_s->last_tspecs_count);
959 }
960
961
wmm_ac_clear_saved_tspecs(struct wpa_supplicant * wpa_s)962 void wmm_ac_clear_saved_tspecs(struct wpa_supplicant *wpa_s)
963 {
964 if (wpa_s->last_tspecs) {
965 wpa_printf(MSG_DEBUG, "WMM AC: Clear saved tspecs");
966 os_free(wpa_s->last_tspecs);
967 wpa_s->last_tspecs = NULL;
968 wpa_s->last_tspecs_count = 0;
969 }
970 }
971
972
wmm_ac_restore_tspecs(struct wpa_supplicant * wpa_s)973 int wmm_ac_restore_tspecs(struct wpa_supplicant *wpa_s)
974 {
975 unsigned int i;
976
977 if (!wpa_s->wmm_ac_assoc_info || !wpa_s->last_tspecs_count)
978 return 0;
979
980 wpa_printf(MSG_DEBUG, "WMM AC: Restore %u saved tspecs",
981 wpa_s->last_tspecs_count);
982
983 for (i = 0; i < wpa_s->last_tspecs_count; i++)
984 wmm_ac_add_ts(wpa_s, wpa_s->bssid, &wpa_s->last_tspecs[i]);
985
986 return 0;
987 }
988