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a0413b17 MB |
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" | |
674f6c07 | 13 | #include "utils/list.h" |
d1f88001 | 14 | #include "utils/eloop.h" |
a0413b17 MB |
15 | #include "common/ieee802_11_common.h" |
16 | #include "wpa_supplicant_i.h" | |
674f6c07 | 17 | #include "bss.h" |
a0413b17 MB |
18 | #include "driver_i.h" |
19 | #include "wmm_ac.h" | |
20 | ||
d1f88001 | 21 | static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx); |
a0413b17 | 22 | |
674f6c07 EP |
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 | ||
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 | ||
d1f88001 MB |
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 | ||
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 | ||
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 | ||
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_malloc(sizeof(*_tspec)); | |
91 | if (!_tspec) | |
92 | return -1; | |
93 | ||
94 | /* store the admitted TSPEC */ | |
95 | os_memcpy(_tspec, tspec, sizeof(*_tspec)); | |
96 | ||
97 | if (dir != WMM_AC_DIR_DOWNLINK) { | |
98 | ret = wpa_drv_add_ts(wpa_s, tsid, addr, up, admitted_time); | |
99 | wpa_printf(MSG_DEBUG, | |
100 | "WMM AC: Add TS: addr=" MACSTR | |
101 | " TSID=%u admitted time=%u, ret=%d", | |
102 | MAC2STR(addr), tsid, admitted_time, ret); | |
103 | if (ret < 0) { | |
104 | os_free(_tspec); | |
105 | return -1; | |
106 | } | |
107 | } | |
108 | ||
109 | wpa_s->tspecs[ac][idx] = _tspec; | |
110 | ||
111 | wpa_printf(MSG_DEBUG, "Traffic stream was created successfully"); | |
112 | ||
113 | wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_ADDED | |
114 | "tsid=%d addr=" MACSTR " admitted_time=%d", | |
115 | tsid, MAC2STR(addr), admitted_time); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | ||
121 | static void wmm_ac_del_ts_idx(struct wpa_supplicant *wpa_s, u8 ac, | |
122 | enum ts_dir_idx dir) | |
123 | { | |
124 | struct wmm_tspec_element *tspec = wpa_s->tspecs[ac][dir]; | |
125 | u8 tsid; | |
126 | ||
127 | if (!tspec) | |
128 | return; | |
129 | ||
130 | tsid = wmm_ac_get_tsid(tspec); | |
131 | wpa_printf(MSG_DEBUG, "WMM AC: Del TS ac=%d tsid=%d", ac, tsid); | |
132 | ||
133 | /* update the driver in case of uplink/bidi */ | |
134 | if (wmm_ac_get_direction(tspec) != WMM_AC_DIR_DOWNLINK) | |
135 | wpa_drv_del_ts(wpa_s, tsid, wpa_s->bssid); | |
136 | ||
137 | wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REMOVED | |
138 | "tsid=%d addr=" MACSTR, tsid, MAC2STR(wpa_s->bssid)); | |
139 | ||
140 | os_free(wpa_s->tspecs[ac][dir]); | |
141 | wpa_s->tspecs[ac][dir] = NULL; | |
142 | } | |
143 | ||
144 | ||
145 | static void wmm_ac_del_req(struct wpa_supplicant *wpa_s, int failed) | |
146 | { | |
147 | struct wmm_ac_addts_request *req = wpa_s->addts_request; | |
148 | ||
149 | if (!req) | |
150 | return; | |
151 | ||
152 | if (failed) | |
153 | wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED | |
154 | "tsid=%u", wmm_ac_get_tsid(&req->tspec)); | |
155 | ||
156 | eloop_cancel_timeout(wmm_ac_addts_req_timeout, wpa_s, req); | |
157 | wpa_s->addts_request = NULL; | |
158 | os_free(req); | |
159 | } | |
160 | ||
161 | ||
162 | static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx) | |
163 | { | |
164 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
165 | struct wmm_ac_addts_request *addts_req = timeout_ctx; | |
166 | ||
167 | wpa_printf(MSG_DEBUG, | |
168 | "Timeout getting ADDTS response (tsid=%d up=%d)", | |
169 | wmm_ac_get_tsid(&addts_req->tspec), | |
170 | wmm_ac_get_user_priority(&addts_req->tspec)); | |
171 | ||
172 | wmm_ac_del_req(wpa_s, 1); | |
173 | } | |
174 | ||
175 | ||
674f6c07 EP |
176 | static int wmm_ac_send_addts_request(struct wpa_supplicant *wpa_s, |
177 | const struct wmm_ac_addts_request *req) | |
178 | { | |
179 | struct wpabuf *buf; | |
180 | int ret; | |
181 | ||
182 | wpa_printf(MSG_DEBUG, "Sending ADDTS Request to " MACSTR, | |
183 | MAC2STR(req->address)); | |
184 | ||
185 | /* category + action code + dialog token + status + sizeof(tspec) */ | |
186 | buf = wpabuf_alloc(4 + sizeof(req->tspec)); | |
187 | if (!buf) { | |
188 | wpa_printf(MSG_ERROR, "WMM AC: Allocation error"); | |
189 | return -1; | |
190 | } | |
191 | ||
192 | wpabuf_put_u8(buf, WLAN_ACTION_WMM); | |
193 | wpabuf_put_u8(buf, WMM_ACTION_CODE_ADDTS_REQ); | |
194 | wpabuf_put_u8(buf, req->dialog_token); | |
195 | wpabuf_put_u8(buf, 0); /* status code */ | |
196 | wpabuf_put_data(buf, &req->tspec, sizeof(req->tspec)); | |
197 | ||
198 | ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, req->address, | |
199 | wpa_s->own_addr, wpa_s->bssid, | |
200 | wpabuf_head(buf), wpabuf_len(buf), 0); | |
201 | if (ret) { | |
202 | wpa_printf(MSG_WARNING, | |
203 | "WMM AC: Failed to send ADDTS Request"); | |
204 | } | |
205 | ||
206 | wpabuf_free(buf); | |
207 | return ret; | |
208 | } | |
209 | ||
210 | ||
211 | static int wmm_ac_send_delts(struct wpa_supplicant *wpa_s, | |
212 | const struct wmm_tspec_element *tspec, | |
213 | const u8 *address) | |
214 | { | |
215 | struct wpabuf *buf; | |
216 | int ret; | |
217 | ||
218 | /* category + action code + dialog token + status + sizeof(tspec) */ | |
219 | buf = wpabuf_alloc(4 + sizeof(*tspec)); | |
220 | if (!buf) | |
221 | return -1; | |
222 | ||
223 | wpa_printf(MSG_DEBUG, "Sending DELTS to " MACSTR, MAC2STR(address)); | |
224 | ||
225 | /* category + action code + dialog token + status + sizeof(tspec) */ | |
226 | wpabuf_put_u8(buf, WLAN_ACTION_WMM); | |
227 | wpabuf_put_u8(buf, WMM_ACTION_CODE_DELTS); | |
228 | wpabuf_put_u8(buf, 0); /* Dialog Token (not used) */ | |
229 | wpabuf_put_u8(buf, 0); /* Status Code (not used) */ | |
230 | wpabuf_put_data(buf, tspec, sizeof(*tspec)); | |
231 | ||
232 | ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, address, | |
233 | wpa_s->own_addr, wpa_s->bssid, | |
234 | wpabuf_head(buf), wpabuf_len(buf), 0); | |
235 | if (ret) | |
236 | wpa_printf(MSG_WARNING, "Failed to send DELTS frame"); | |
237 | ||
238 | wpabuf_free(buf); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | ||
243 | /* return the AC using the given TSPEC tid */ | |
244 | static int wmm_ac_find_tsid(struct wpa_supplicant *wpa_s, u8 tsid, | |
245 | enum ts_dir_idx *dir) | |
246 | { | |
247 | int ac; | |
248 | enum ts_dir_idx idx; | |
249 | ||
250 | for (ac = 0; ac < WMM_AC_NUM; ac++) { | |
251 | for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) { | |
252 | if (wpa_s->tspecs[ac][idx] && | |
253 | wmm_ac_get_tsid(wpa_s->tspecs[ac][idx]) == tsid) { | |
254 | if (dir) | |
255 | *dir = idx; | |
256 | return ac; | |
257 | } | |
258 | } | |
259 | } | |
260 | ||
261 | return -1; | |
262 | } | |
263 | ||
264 | ||
265 | static struct wmm_ac_addts_request * | |
266 | wmm_ac_build_addts_req(struct wpa_supplicant *wpa_s, | |
267 | const struct wmm_ac_ts_setup_params *params, | |
268 | const u8 *address) | |
269 | { | |
270 | struct wmm_ac_addts_request *addts_req; | |
271 | struct wmm_tspec_element *tspec; | |
272 | u8 ac = up_to_ac[params->user_priority]; | |
273 | u8 uapsd = wpa_s->wmm_ac_assoc_info->ac_params[ac].uapsd; | |
274 | ||
275 | addts_req = os_zalloc(sizeof(*addts_req)); | |
276 | if (!addts_req) | |
277 | return NULL; | |
278 | ||
279 | tspec = &addts_req->tspec; | |
280 | os_memcpy(addts_req->address, address, ETH_ALEN); | |
281 | ||
282 | /* The dialog token cannot be zero */ | |
283 | if (++wpa_s->wmm_ac_last_dialog_token == 0) | |
284 | wpa_s->wmm_ac_last_dialog_token++; | |
285 | ||
286 | addts_req->dialog_token = wpa_s->wmm_ac_last_dialog_token; | |
287 | tspec->eid = WLAN_EID_VENDOR_SPECIFIC; | |
288 | tspec->length = sizeof(*tspec) - 2; /* reduce eid and length */ | |
289 | tspec->oui[0] = 0x00; | |
290 | tspec->oui[1] = 0x50; | |
291 | tspec->oui[2] = 0xf2; | |
292 | tspec->oui_type = WMM_OUI_TYPE; | |
293 | tspec->oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT; | |
294 | tspec->version = WMM_VERSION; | |
295 | ||
296 | tspec->ts_info[0] = params->tsid << 1; | |
297 | tspec->ts_info[0] |= params->direction << 5; | |
298 | tspec->ts_info[0] |= WMM_AC_ACCESS_POLICY_EDCA << 7; | |
299 | tspec->ts_info[1] = uapsd << 2; | |
300 | tspec->ts_info[1] |= params->user_priority << 3; | |
301 | tspec->ts_info[2] = 0; | |
302 | ||
303 | tspec->nominal_msdu_size = host_to_le16(params->nominal_msdu_size); | |
304 | if (params->fixed_nominal_msdu) | |
305 | tspec->nominal_msdu_size |= | |
306 | host_to_le16(WMM_AC_FIXED_MSDU_SIZE); | |
307 | ||
308 | tspec->mean_data_rate = host_to_le32(params->mean_data_rate); | |
309 | tspec->minimum_phy_rate = host_to_le32(params->minimum_phy_rate); | |
310 | tspec->surplus_bandwidth_allowance = | |
311 | host_to_le16(params->surplus_bandwidth_allowance); | |
312 | ||
313 | return addts_req; | |
314 | } | |
315 | ||
316 | ||
317 | static int param_in_range(const char *name, long value, | |
318 | long min_val, long max_val) | |
319 | { | |
320 | if (value < min_val || (max_val >= 0 && value > max_val)) { | |
321 | wpa_printf(MSG_DEBUG, | |
322 | "WMM AC: param %s (%ld) is out of range (%ld-%ld)", | |
323 | name, value, min_val, max_val); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | return 1; | |
328 | } | |
329 | ||
330 | ||
331 | static int wmm_ac_should_replace_ts(struct wpa_supplicant *wpa_s, | |
332 | u8 tsid, u8 ac, u8 dir) | |
333 | { | |
334 | enum ts_dir_idx idx; | |
335 | int cur_ac, existing_ts = 0, replace_ts = 0; | |
336 | ||
337 | cur_ac = wmm_ac_find_tsid(wpa_s, tsid, &idx); | |
338 | if (cur_ac >= 0) { | |
339 | if (cur_ac != ac) { | |
340 | wpa_printf(MSG_DEBUG, | |
341 | "WMM AC: TSID %i already exists on different ac (%d)", | |
342 | tsid, cur_ac); | |
343 | return -1; | |
344 | } | |
345 | ||
346 | /* same tsid - this tspec will replace the current one */ | |
347 | replace_ts |= BIT(idx); | |
348 | } | |
349 | ||
350 | for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) { | |
351 | if (wpa_s->tspecs[ac][idx]) | |
352 | existing_ts |= BIT(idx); | |
353 | } | |
354 | ||
355 | switch (dir) { | |
356 | case WMM_AC_DIR_UPLINK: | |
357 | /* replace existing uplink/bidi tspecs */ | |
358 | replace_ts |= existing_ts & (BIT(TS_DIR_IDX_UPLINK) | | |
359 | BIT(TS_DIR_IDX_BIDI)); | |
360 | break; | |
361 | case WMM_AC_DIR_DOWNLINK: | |
362 | /* replace existing downlink/bidi tspecs */ | |
363 | replace_ts |= existing_ts & (BIT(TS_DIR_IDX_DOWNLINK) | | |
364 | BIT(TS_DIR_IDX_BIDI)); | |
365 | break; | |
366 | case WMM_AC_DIR_BIDIRECTIONAL: | |
367 | /* replace all existing tspecs */ | |
368 | replace_ts |= existing_ts; | |
369 | break; | |
370 | default: | |
371 | return -1; | |
372 | } | |
373 | ||
374 | return replace_ts; | |
375 | } | |
376 | ||
377 | ||
378 | static int wmm_ac_ts_req_is_valid(struct wpa_supplicant *wpa_s, | |
379 | const struct wmm_ac_ts_setup_params *params) | |
380 | { | |
381 | enum wmm_ac req_ac; | |
382 | ||
383 | #define PARAM_IN_RANGE(field, min_value, max_value) \ | |
384 | param_in_range(#field, params->field, min_value, max_value) | |
385 | ||
386 | if (!PARAM_IN_RANGE(tsid, 0, WMM_AC_MAX_TID) || | |
387 | !PARAM_IN_RANGE(user_priority, 0, WMM_AC_MAX_USER_PRIORITY) || | |
388 | !PARAM_IN_RANGE(nominal_msdu_size, 1, WMM_AC_MAX_NOMINAL_MSDU) || | |
389 | !PARAM_IN_RANGE(mean_data_rate, 1, -1) || | |
390 | !PARAM_IN_RANGE(minimum_phy_rate, 1, -1) || | |
391 | !PARAM_IN_RANGE(surplus_bandwidth_allowance, WMM_AC_MIN_SBA_UNITY, | |
392 | -1)) | |
393 | return 0; | |
394 | #undef PARAM_IN_RANGE | |
395 | ||
396 | if (!(params->direction == WMM_TSPEC_DIRECTION_UPLINK || | |
397 | params->direction == WMM_TSPEC_DIRECTION_DOWNLINK || | |
398 | params->direction == WMM_TSPEC_DIRECTION_BI_DIRECTIONAL)) { | |
399 | wpa_printf(MSG_DEBUG, "WMM AC: invalid TS direction: %d", | |
400 | params->direction); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | req_ac = up_to_ac[params->user_priority]; | |
405 | ||
406 | /* Requested accesss category must have acm */ | |
407 | if (!wpa_s->wmm_ac_assoc_info->ac_params[req_ac].acm) { | |
408 | wpa_printf(MSG_DEBUG, "WMM AC: AC %d is not ACM", req_ac); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | if (wmm_ac_should_replace_ts(wpa_s, params->tsid, req_ac, | |
413 | params->direction) < 0) | |
414 | return 0; | |
415 | ||
416 | return 1; | |
417 | } | |
418 | ||
419 | ||
a0413b17 MB |
420 | static struct wmm_ac_assoc_data * |
421 | wmm_ac_process_param_elem(struct wpa_supplicant *wpa_s, const u8 *ies, | |
422 | size_t ies_len) | |
423 | { | |
424 | struct ieee802_11_elems elems; | |
425 | struct wmm_parameter_element *wmm_params; | |
426 | struct wmm_ac_assoc_data *assoc_data; | |
427 | int i; | |
428 | ||
429 | /* Parsing WMM Parameter Element */ | |
430 | if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) != ParseOK) { | |
431 | wpa_printf(MSG_DEBUG, "WMM AC: could not parse assoc ies"); | |
432 | return NULL; | |
433 | } | |
434 | ||
435 | if (!elems.wmm) { | |
436 | wpa_printf(MSG_DEBUG, "WMM AC: No WMM IE"); | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | if (elems.wmm_len != sizeof(*wmm_params)) { | |
441 | wpa_printf(MSG_WARNING, "WMM AC: Invalid WMM ie length"); | |
442 | return NULL; | |
443 | } | |
444 | ||
445 | wmm_params = (struct wmm_parameter_element *)(elems.wmm); | |
446 | ||
447 | assoc_data = os_zalloc(sizeof(*assoc_data)); | |
448 | if (!assoc_data) | |
449 | return NULL; | |
450 | ||
451 | for (i = 0; i < WMM_AC_NUM; i++) | |
452 | assoc_data->ac_params[i].acm = | |
453 | !!(wmm_params->ac[i].aci_aifsn & WMM_AC_ACM); | |
454 | ||
455 | wpa_printf(MSG_DEBUG, | |
456 | "WMM AC: AC mandatory: AC_BE=%u AC_BK=%u AC_VI=%u AC_VO=%u", | |
457 | assoc_data->ac_params[WMM_AC_BE].acm, | |
458 | assoc_data->ac_params[WMM_AC_BK].acm, | |
459 | assoc_data->ac_params[WMM_AC_VI].acm, | |
460 | assoc_data->ac_params[WMM_AC_VO].acm); | |
461 | ||
462 | return assoc_data; | |
463 | } | |
464 | ||
465 | ||
466 | static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies, | |
467 | size_t ies_len, const struct wmm_params *wmm_params) | |
468 | { | |
469 | struct wmm_ac_assoc_data *assoc_data; | |
470 | u8 ac; | |
471 | ||
472 | if (wpa_s->wmm_ac_assoc_info) { | |
473 | wpa_printf(MSG_ERROR, "WMM AC: Already initialized"); | |
474 | return -1; | |
475 | } | |
476 | ||
477 | if (!ies) { | |
478 | wpa_printf(MSG_ERROR, "WMM AC: Missing IEs"); | |
479 | return -1; | |
480 | } | |
481 | ||
482 | if (!(wmm_params->info_bitmap & WMM_PARAMS_UAPSD_QUEUES_INFO)) { | |
483 | wpa_printf(MSG_DEBUG, "WMM AC: Missing U-APSD configuration"); | |
484 | return -1; | |
485 | } | |
486 | ||
674f6c07 EP |
487 | os_memset(wpa_s->tspecs, 0, sizeof(wpa_s->tspecs)); |
488 | wpa_s->wmm_ac_last_dialog_token = 0; | |
d1f88001 | 489 | wpa_s->addts_request = NULL; |
674f6c07 | 490 | |
a0413b17 MB |
491 | assoc_data = wmm_ac_process_param_elem(wpa_s, ies, ies_len); |
492 | if (!assoc_data) | |
493 | return -1; | |
494 | ||
495 | wpa_printf(MSG_DEBUG, "WMM AC: U-APSD queues=0x%x", | |
496 | wmm_params->uapsd_queues); | |
497 | ||
498 | for (ac = 0; ac < WMM_AC_NUM; ac++) { | |
499 | assoc_data->ac_params[ac].uapsd = | |
500 | !!(wmm_params->uapsd_queues & BIT(ac)); | |
501 | } | |
502 | ||
503 | wpa_s->wmm_ac_assoc_info = assoc_data; | |
504 | return 0; | |
505 | } | |
506 | ||
507 | ||
674f6c07 EP |
508 | static void wmm_ac_del_ts(struct wpa_supplicant *wpa_s, u8 ac, int dir_bitmap) |
509 | { | |
510 | enum ts_dir_idx idx; | |
511 | ||
512 | for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) { | |
513 | if (!(dir_bitmap & BIT(idx))) | |
514 | continue; | |
515 | ||
d1f88001 | 516 | wmm_ac_del_ts_idx(wpa_s, ac, idx); |
674f6c07 EP |
517 | } |
518 | } | |
519 | ||
520 | ||
a0413b17 MB |
521 | static void wmm_ac_deinit(struct wpa_supplicant *wpa_s) |
522 | { | |
674f6c07 EP |
523 | int i; |
524 | ||
525 | for (i = 0; i < WMM_AC_NUM; i++) | |
526 | wmm_ac_del_ts(wpa_s, i, TS_DIR_IDX_ALL); | |
527 | ||
d1f88001 MB |
528 | /* delete pending add_ts requset */ |
529 | wmm_ac_del_req(wpa_s, 1); | |
530 | ||
a0413b17 MB |
531 | os_free(wpa_s->wmm_ac_assoc_info); |
532 | wpa_s->wmm_ac_assoc_info = NULL; | |
533 | } | |
534 | ||
535 | ||
536 | void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies, | |
537 | size_t ies_len, const struct wmm_params *wmm_params) | |
538 | { | |
539 | if (wmm_ac_init(wpa_s, ies, ies_len, wmm_params)) | |
540 | return; | |
541 | ||
542 | wpa_printf(MSG_DEBUG, | |
543 | "WMM AC: Valid WMM association, WMM AC is enabled"); | |
544 | } | |
545 | ||
546 | ||
547 | void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s) | |
548 | { | |
549 | if (!wpa_s->wmm_ac_assoc_info) | |
550 | return; | |
551 | ||
552 | wmm_ac_deinit(wpa_s); | |
553 | wpa_printf(MSG_DEBUG, "WMM AC: WMM AC is disabled"); | |
554 | } | |
674f6c07 EP |
555 | |
556 | ||
557 | int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid) | |
558 | { | |
83b9d426 | 559 | struct wmm_tspec_element tspec; |
674f6c07 EP |
560 | int ac; |
561 | enum ts_dir_idx dir; | |
562 | ||
563 | if (!wpa_s->wmm_ac_assoc_info) { | |
564 | wpa_printf(MSG_DEBUG, | |
565 | "WMM AC: Failed to delete TS, WMM AC is disabled"); | |
566 | return -1; | |
567 | } | |
568 | ||
569 | ac = wmm_ac_find_tsid(wpa_s, tsid, &dir); | |
570 | if (ac < 0) { | |
571 | wpa_printf(MSG_DEBUG, "WMM AC: TS does not exist"); | |
572 | return -1; | |
573 | } | |
574 | ||
83b9d426 | 575 | tspec = *wpa_s->tspecs[ac][dir]; |
674f6c07 | 576 | |
d1f88001 | 577 | wmm_ac_del_ts_idx(wpa_s, ac, dir); |
674f6c07 | 578 | |
83b9d426 JB |
579 | wmm_ac_send_delts(wpa_s, &tspec, wpa_s->bssid); |
580 | ||
674f6c07 EP |
581 | return 0; |
582 | } | |
583 | ||
584 | ||
585 | int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s, | |
586 | struct wmm_ac_ts_setup_params *params) | |
587 | { | |
588 | struct wmm_ac_addts_request *addts_req; | |
589 | ||
590 | if (!wpa_s->wmm_ac_assoc_info) { | |
591 | wpa_printf(MSG_DEBUG, | |
592 | "WMM AC: Cannot add TS - missing assoc data"); | |
593 | return -1; | |
594 | } | |
595 | ||
d1f88001 MB |
596 | if (wpa_s->addts_request) { |
597 | wpa_printf(MSG_DEBUG, | |
598 | "WMM AC: can't add TS - ADDTS request is already pending"); | |
599 | return -1; | |
600 | } | |
601 | ||
674f6c07 EP |
602 | /* |
603 | * we can setup downlink TS even without driver support. | |
604 | * however, we need driver support for the other directions. | |
605 | */ | |
606 | if (params->direction != WMM_AC_DIR_DOWNLINK && | |
607 | !wpa_s->wmm_ac_supported) { | |
608 | wpa_printf(MSG_DEBUG, | |
609 | "Cannot set uplink/bidi TS without driver support"); | |
610 | return -1; | |
611 | } | |
612 | ||
613 | if (!wmm_ac_ts_req_is_valid(wpa_s, params)) | |
614 | return -1; | |
615 | ||
616 | wpa_printf(MSG_DEBUG, "WMM AC: TS setup request (addr=" MACSTR | |
617 | " tsid=%u user priority=%u direction=%d)", | |
618 | MAC2STR(wpa_s->bssid), params->tsid, | |
619 | params->user_priority, params->direction); | |
620 | ||
621 | addts_req = wmm_ac_build_addts_req(wpa_s, params, wpa_s->bssid); | |
622 | if (!addts_req) | |
623 | return -1; | |
624 | ||
625 | if (wmm_ac_send_addts_request(wpa_s, addts_req)) | |
626 | goto err; | |
627 | ||
d1f88001 MB |
628 | /* save as pending and set ADDTS resp timeout to 1 second */ |
629 | wpa_s->addts_request = addts_req; | |
630 | eloop_register_timeout(1, 0, wmm_ac_addts_req_timeout, | |
631 | wpa_s, addts_req); | |
674f6c07 EP |
632 | return 0; |
633 | err: | |
634 | os_free(addts_req); | |
635 | return -1; | |
636 | } | |
d1f88001 MB |
637 | |
638 | ||
639 | static void wmm_ac_handle_delts(struct wpa_supplicant *wpa_s, const u8 *sa, | |
640 | const struct wmm_tspec_element *tspec) | |
641 | { | |
642 | int ac; | |
643 | u8 tsid; | |
644 | enum ts_dir_idx idx; | |
645 | ||
646 | tsid = wmm_ac_get_tsid(tspec); | |
647 | ||
648 | wpa_printf(MSG_DEBUG, | |
649 | "WMM AC: DELTS frame has been received TSID=%u addr=" | |
650 | MACSTR, tsid, MAC2STR(sa)); | |
651 | ||
652 | ac = wmm_ac_find_tsid(wpa_s, tsid, &idx); | |
653 | if (ac < 0) { | |
654 | wpa_printf(MSG_DEBUG, | |
655 | "WMM AC: Ignoring DELTS frame - TSID does not exist"); | |
656 | return; | |
657 | } | |
658 | ||
659 | wmm_ac_del_ts_idx(wpa_s, ac, idx); | |
660 | ||
661 | wpa_printf(MSG_INFO, | |
662 | "TS was deleted successfully (tsid=%u address=" MACSTR ")", | |
663 | tsid, MAC2STR(sa)); | |
664 | } | |
665 | ||
666 | ||
667 | static void wmm_ac_handle_addts_resp(struct wpa_supplicant *wpa_s, const u8 *sa, | |
668 | const u8 resp_dialog_token, const u8 status_code, | |
669 | const struct wmm_tspec_element *tspec) | |
670 | { | |
671 | struct wmm_ac_addts_request *req = wpa_s->addts_request; | |
672 | u8 ac, tsid, up, dir; | |
673 | int replace_tspecs; | |
674 | ||
675 | tsid = wmm_ac_get_tsid(tspec); | |
676 | dir = wmm_ac_get_direction(tspec); | |
677 | up = wmm_ac_get_user_priority(tspec); | |
678 | ac = up_to_ac[up]; | |
679 | ||
680 | /* make sure we have a matching addts request */ | |
681 | if (!req || req->dialog_token != resp_dialog_token) { | |
682 | wpa_printf(MSG_ERROR, | |
683 | "WMM AC: no req with dialog=%u, ignoring frame", | |
684 | resp_dialog_token); | |
685 | return; | |
686 | } | |
687 | ||
688 | /* make sure the params are the same */ | |
689 | if (os_memcmp(req->address, sa, ETH_ALEN) != 0 || | |
690 | tsid != wmm_ac_get_tsid(&req->tspec) || | |
691 | up != wmm_ac_get_user_priority(&req->tspec) || | |
692 | dir != wmm_ac_get_direction(&req->tspec)) { | |
693 | wpa_printf(MSG_ERROR, | |
694 | "WMM AC: ADDTS params do not match, ignoring frame"); | |
695 | return; | |
696 | } | |
697 | ||
698 | /* delete pending request */ | |
699 | wmm_ac_del_req(wpa_s, 0); | |
700 | ||
701 | wpa_printf(MSG_INFO, | |
702 | "ADDTS response status=%d tsid=%u up=%u direction=%u", | |
703 | status_code, tsid, up, dir); | |
704 | ||
705 | if (status_code != WMM_ADDTS_STATUS_ADMISSION_ACCEPTED) { | |
706 | wpa_printf(MSG_INFO, "WMM AC: ADDTS request was rejected"); | |
707 | goto err_msg; | |
708 | } | |
709 | ||
710 | replace_tspecs = wmm_ac_should_replace_ts(wpa_s, tsid, ac, dir); | |
711 | if (replace_tspecs < 0) | |
712 | goto err_delts; | |
713 | ||
714 | wpa_printf(MSG_DEBUG, "ts idx replace bitmap: 0x%x", replace_tspecs); | |
715 | ||
716 | /* when replacing tspecs - delete first */ | |
717 | wmm_ac_del_ts(wpa_s, ac, replace_tspecs); | |
718 | ||
719 | /* Creating a new traffic stream */ | |
720 | wpa_printf(MSG_DEBUG, | |
721 | "WMM AC: adding a new TS with TSID=%u address="MACSTR | |
722 | " medium time=%u access category=%d dir=%d ", | |
723 | tsid, MAC2STR(sa), | |
724 | le_to_host16(tspec->medium_time), ac, dir); | |
725 | ||
726 | if (wmm_ac_add_ts(wpa_s, sa, tspec)) | |
727 | goto err_delts; | |
728 | ||
729 | return; | |
730 | ||
731 | err_delts: | |
732 | /* ask the ap to delete the tspec */ | |
733 | wmm_ac_send_delts(wpa_s, tspec, sa); | |
734 | err_msg: | |
735 | wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED "tsid=%u", | |
736 | tsid); | |
737 | } | |
738 | ||
739 | ||
740 | void wmm_ac_rx_action(struct wpa_supplicant *wpa_s, const u8 *da, | |
741 | const u8 *sa, const u8 *data, size_t len) | |
742 | { | |
743 | u8 action; | |
744 | u8 dialog_token; | |
745 | u8 status_code; | |
746 | struct ieee802_11_elems elems; | |
747 | struct wmm_tspec_element *tspec; | |
748 | ||
749 | if (wpa_s->wmm_ac_assoc_info == NULL) { | |
750 | wpa_printf(MSG_WARNING, | |
751 | "WMM AC: WMM AC is disabled, ignoring action frame"); | |
752 | return; | |
753 | } | |
754 | ||
755 | action = data[0]; | |
756 | ||
757 | if (action != WMM_ACTION_CODE_ADDTS_RESP && | |
758 | action != WMM_ACTION_CODE_DELTS) { | |
759 | wpa_printf(MSG_WARNING, | |
760 | "WMM AC: Unknown action (%d), ignoring action frame", | |
761 | action); | |
762 | return; | |
763 | } | |
764 | ||
765 | /* WMM AC action frame */ | |
766 | if (os_memcmp(da, wpa_s->own_addr, ETH_ALEN) != 0) { | |
767 | wpa_printf(MSG_DEBUG, "WMM AC: frame destination addr="MACSTR | |
768 | " is other than ours, ignoring frame", MAC2STR(da)); | |
769 | return; | |
770 | } | |
771 | ||
772 | if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) { | |
773 | wpa_printf(MSG_DEBUG, "WMM AC: ignore frame with sa " MACSTR | |
774 | " different other than our bssid", MAC2STR(da)); | |
775 | return; | |
776 | } | |
777 | ||
778 | if (len < 2 + sizeof(struct wmm_tspec_element)) { | |
779 | wpa_printf(MSG_DEBUG, | |
780 | "WMM AC: Short ADDTS response ignored (len=%lu)", | |
781 | (unsigned long) len); | |
782 | return; | |
783 | } | |
784 | ||
785 | data++; | |
786 | len--; | |
787 | dialog_token = data[0]; | |
788 | status_code = data[1]; | |
789 | ||
790 | if (ieee802_11_parse_elems(data + 2, len - 2, &elems, 1) != ParseOK) { | |
791 | wpa_printf(MSG_DEBUG, | |
792 | "WMM AC: Could not parse WMM AC action from " MACSTR, | |
793 | MAC2STR(sa)); | |
794 | return; | |
795 | } | |
796 | ||
797 | /* the struct also contains the type and value, so decrease it */ | |
798 | if (elems.wmm_tspec_len != sizeof(struct wmm_tspec_element) - 2) { | |
799 | wpa_printf(MSG_DEBUG, "WMM AC: missing or wrong length TSPEC"); | |
800 | return; | |
801 | } | |
802 | ||
803 | tspec = (struct wmm_tspec_element *)(elems.wmm_tspec - 2); | |
804 | ||
805 | wpa_printf(MSG_DEBUG, "WMM AC: RX WMM AC Action from " MACSTR, | |
806 | MAC2STR(sa)); | |
807 | wpa_hexdump(MSG_MSGDUMP, "WMM AC: WMM AC Action content", data, len); | |
808 | ||
809 | switch (action) { | |
810 | case WMM_ACTION_CODE_ADDTS_RESP: | |
811 | wmm_ac_handle_addts_resp(wpa_s, sa, dialog_token, status_code, | |
812 | tspec); | |
813 | break; | |
814 | case WMM_ACTION_CODE_DELTS: | |
815 | wmm_ac_handle_delts(wpa_s, sa, tspec); | |
816 | break; | |
817 | default: | |
818 | break; | |
819 | } | |
820 | } | |
8506ea6f MB |
821 | |
822 | ||
823 | static const char * get_ac_str(u8 ac) | |
824 | { | |
825 | switch (ac) { | |
826 | case WMM_AC_BE: | |
827 | return "BE"; | |
828 | case WMM_AC_BK: | |
829 | return "BK"; | |
830 | case WMM_AC_VI: | |
831 | return "VI"; | |
832 | case WMM_AC_VO: | |
833 | return "VO"; | |
834 | default: | |
835 | return "N/A"; | |
836 | } | |
837 | } | |
838 | ||
839 | ||
840 | static const char * get_direction_str(u8 direction) | |
841 | { | |
842 | switch (direction) { | |
843 | case WMM_AC_DIR_DOWNLINK: | |
844 | return "Downlink"; | |
845 | case WMM_AC_DIR_UPLINK: | |
846 | return "Uplink"; | |
847 | case WMM_AC_DIR_BIDIRECTIONAL: | |
848 | return "Bi-directional"; | |
849 | default: | |
850 | return "N/A"; | |
851 | } | |
852 | } | |
853 | ||
854 | ||
855 | int wpas_wmm_ac_status(struct wpa_supplicant *wpa_s, char *buf, size_t buflen) | |
856 | { | |
857 | struct wmm_ac_assoc_data *assoc_info = wpa_s->wmm_ac_assoc_info; | |
858 | enum ts_dir_idx idx; | |
859 | int pos = 0; | |
860 | u8 ac; | |
861 | ||
862 | if (!assoc_info) { | |
863 | return wpa_scnprintf(buf, buflen - pos, | |
864 | "Not associated to a WMM AP, WMM AC is Disabled\n"); | |
865 | } | |
866 | ||
867 | pos += wpa_scnprintf(buf + pos, buflen - pos, "WMM AC is Enabled\n"); | |
868 | ||
869 | for (ac = 0; ac < WMM_AC_NUM; ac++) { | |
870 | int ts_count = 0; | |
871 | ||
872 | pos += wpa_scnprintf(buf + pos, buflen - pos, | |
873 | "%s: acm=%d uapsd=%d\n", | |
874 | get_ac_str(ac), | |
875 | assoc_info->ac_params[ac].acm, | |
876 | assoc_info->ac_params[ac].uapsd); | |
877 | ||
878 | for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) { | |
879 | struct wmm_tspec_element *tspec; | |
880 | u8 dir, tsid; | |
881 | const char *dir_str; | |
882 | ||
883 | tspec = wpa_s->tspecs[ac][idx]; | |
884 | if (!tspec) | |
885 | continue; | |
886 | ||
887 | ts_count++; | |
888 | ||
889 | dir = wmm_ac_get_direction(tspec); | |
890 | dir_str = get_direction_str(dir); | |
891 | tsid = wmm_ac_get_tsid(tspec); | |
892 | ||
893 | pos += wpa_scnprintf(buf + pos, buflen - pos, | |
894 | "\tTSID = %u\n" | |
895 | "\tAddress = "MACSTR"\n" | |
896 | "\tWMM AC dir = %s\n" | |
897 | "\tTotal admitted time = %u\n\n", | |
898 | tsid, | |
899 | MAC2STR(wpa_s->bssid), | |
900 | dir_str, | |
901 | le_to_host16(tspec->medium_time)); | |
902 | } | |
903 | ||
904 | if (!ts_count) { | |
905 | pos += wpa_scnprintf(buf + pos, buflen - pos, | |
906 | "\t(No Traffic Stream)\n\n"); | |
907 | } | |
908 | } | |
909 | ||
910 | return pos; | |
911 | } |