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1 | /* | |
2 | * wpa_supplicant - WNM | |
3 | * Copyright (c) 2011-2013, Qualcomm Atheros, Inc. | |
4 | * | |
5 | * This software may be distributed under the terms of the BSD license. | |
6 | * See README for more details. | |
7 | */ | |
8 | ||
9 | #include "utils/includes.h" | |
10 | ||
11 | #include "utils/common.h" | |
12 | #include "common/ieee802_11_defs.h" | |
13 | #include "common/ieee802_11_common.h" | |
14 | #include "common/wpa_ctrl.h" | |
15 | #include "common/ocv.h" | |
16 | #include "rsn_supp/wpa.h" | |
17 | #include "config.h" | |
18 | #include "wpa_supplicant_i.h" | |
19 | #include "driver_i.h" | |
20 | #include "scan.h" | |
21 | #include "ctrl_iface.h" | |
22 | #include "bss.h" | |
23 | #include "wnm_sta.h" | |
24 | #include "notify.h" | |
25 | #include "hs20_supplicant.h" | |
26 | ||
27 | #define MAX_TFS_IE_LEN 1024 | |
28 | #define WNM_MAX_NEIGHBOR_REPORT 10 | |
29 | ||
30 | #define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */ | |
31 | ||
32 | /* get the TFS IE from driver */ | |
33 | static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf, | |
34 | u16 *buf_len, enum wnm_oper oper) | |
35 | { | |
36 | wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper); | |
37 | ||
38 | return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len); | |
39 | } | |
40 | ||
41 | ||
42 | /* set the TFS IE to driver */ | |
43 | static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s, | |
44 | const u8 *addr, const u8 *buf, u16 buf_len, | |
45 | enum wnm_oper oper) | |
46 | { | |
47 | u16 len = buf_len; | |
48 | ||
49 | wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper); | |
50 | ||
51 | return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len); | |
52 | } | |
53 | ||
54 | ||
55 | /* MLME-SLEEPMODE.request */ | |
56 | int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s, | |
57 | u8 action, u16 intval, struct wpabuf *tfs_req) | |
58 | { | |
59 | struct ieee80211_mgmt *mgmt; | |
60 | int res; | |
61 | size_t len; | |
62 | struct wnm_sleep_element *wnmsleep_ie; | |
63 | u8 *wnmtfs_ie, *oci_ie; | |
64 | u8 wnmsleep_ie_len, oci_ie_len; | |
65 | u16 wnmtfs_ie_len; /* possibly multiple IE(s) */ | |
66 | enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD : | |
67 | WNM_SLEEP_TFS_REQ_IE_NONE; | |
68 | ||
69 | wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request " | |
70 | "action=%s to " MACSTR, | |
71 | action == 0 ? "enter" : "exit", | |
72 | MAC2STR(wpa_s->bssid)); | |
73 | ||
74 | /* WNM-Sleep Mode IE */ | |
75 | wnmsleep_ie_len = sizeof(struct wnm_sleep_element); | |
76 | wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element)); | |
77 | if (wnmsleep_ie == NULL) | |
78 | return -1; | |
79 | wnmsleep_ie->eid = WLAN_EID_WNMSLEEP; | |
80 | wnmsleep_ie->len = wnmsleep_ie_len - 2; | |
81 | wnmsleep_ie->action_type = action; | |
82 | wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT; | |
83 | wnmsleep_ie->intval = host_to_le16(intval); | |
84 | wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element", | |
85 | (u8 *) wnmsleep_ie, wnmsleep_ie_len); | |
86 | ||
87 | /* TFS IE(s) */ | |
88 | if (tfs_req) { | |
89 | wnmtfs_ie_len = wpabuf_len(tfs_req); | |
90 | wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len); | |
91 | if (wnmtfs_ie == NULL) { | |
92 | os_free(wnmsleep_ie); | |
93 | return -1; | |
94 | } | |
95 | } else { | |
96 | wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN); | |
97 | if (wnmtfs_ie == NULL) { | |
98 | os_free(wnmsleep_ie); | |
99 | return -1; | |
100 | } | |
101 | if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len, | |
102 | tfs_oper)) { | |
103 | wnmtfs_ie_len = 0; | |
104 | os_free(wnmtfs_ie); | |
105 | wnmtfs_ie = NULL; | |
106 | } | |
107 | } | |
108 | wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element", | |
109 | (u8 *) wnmtfs_ie, wnmtfs_ie_len); | |
110 | ||
111 | oci_ie = NULL; | |
112 | oci_ie_len = 0; | |
113 | #ifdef CONFIG_OCV | |
114 | if (action == WNM_SLEEP_MODE_EXIT && wpa_sm_ocv_enabled(wpa_s->wpa)) { | |
115 | struct wpa_channel_info ci; | |
116 | ||
117 | if (wpa_drv_channel_info(wpa_s, &ci) != 0) { | |
118 | wpa_printf(MSG_WARNING, | |
119 | "Failed to get channel info for OCI element in WNM-Sleep Mode frame"); | |
120 | os_free(wnmsleep_ie); | |
121 | os_free(wnmtfs_ie); | |
122 | return -1; | |
123 | } | |
124 | ||
125 | oci_ie_len = OCV_OCI_EXTENDED_LEN; | |
126 | oci_ie = os_zalloc(oci_ie_len); | |
127 | if (!oci_ie) { | |
128 | wpa_printf(MSG_WARNING, | |
129 | "Failed to allocate buffer for for OCI element in WNM-Sleep Mode frame"); | |
130 | os_free(wnmsleep_ie); | |
131 | os_free(wnmtfs_ie); | |
132 | return -1; | |
133 | } | |
134 | ||
135 | if (ocv_insert_extended_oci(&ci, oci_ie) < 0) { | |
136 | os_free(wnmsleep_ie); | |
137 | os_free(wnmtfs_ie); | |
138 | os_free(oci_ie); | |
139 | return -1; | |
140 | } | |
141 | } | |
142 | #endif /* CONFIG_OCV */ | |
143 | ||
144 | mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len + | |
145 | oci_ie_len); | |
146 | if (mgmt == NULL) { | |
147 | wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for " | |
148 | "WNM-Sleep Request action frame"); | |
149 | os_free(wnmsleep_ie); | |
150 | os_free(wnmtfs_ie); | |
151 | return -1; | |
152 | } | |
153 | ||
154 | os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN); | |
155 | os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN); | |
156 | os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN); | |
157 | mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, | |
158 | WLAN_FC_STYPE_ACTION); | |
159 | mgmt->u.action.category = WLAN_ACTION_WNM; | |
160 | mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ; | |
161 | mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1; | |
162 | os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie, | |
163 | wnmsleep_ie_len); | |
164 | /* copy TFS IE here */ | |
165 | if (wnmtfs_ie_len > 0) { | |
166 | os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable + | |
167 | wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len); | |
168 | } | |
169 | ||
170 | #ifdef CONFIG_OCV | |
171 | /* copy OCV OCI here */ | |
172 | if (oci_ie_len > 0) { | |
173 | os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable + | |
174 | wnmsleep_ie_len + wnmtfs_ie_len, oci_ie, oci_ie_len); | |
175 | } | |
176 | #endif /* CONFIG_OCV */ | |
177 | ||
178 | len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len + | |
179 | wnmtfs_ie_len + oci_ie_len; | |
180 | ||
181 | res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
182 | wpa_s->own_addr, wpa_s->bssid, | |
183 | &mgmt->u.action.category, len, 0); | |
184 | if (res < 0) | |
185 | wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request " | |
186 | "(action=%d, intval=%d)", action, intval); | |
187 | else | |
188 | wpa_s->wnmsleep_used = 1; | |
189 | ||
190 | os_free(wnmsleep_ie); | |
191 | os_free(wnmtfs_ie); | |
192 | os_free(oci_ie); | |
193 | os_free(mgmt); | |
194 | ||
195 | return res; | |
196 | } | |
197 | ||
198 | ||
199 | static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s, | |
200 | const u8 *tfsresp_ie_start, | |
201 | const u8 *tfsresp_ie_end) | |
202 | { | |
203 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM, | |
204 | wpa_s->bssid, NULL, NULL); | |
205 | /* remove GTK/IGTK ?? */ | |
206 | ||
207 | /* set the TFS Resp IE(s) */ | |
208 | if (tfsresp_ie_start && tfsresp_ie_end && | |
209 | tfsresp_ie_end - tfsresp_ie_start >= 0) { | |
210 | u16 tfsresp_ie_len; | |
211 | tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) - | |
212 | tfsresp_ie_start; | |
213 | wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found"); | |
214 | /* pass the TFS Resp IE(s) to driver for processing */ | |
215 | if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid, | |
216 | tfsresp_ie_start, | |
217 | tfsresp_ie_len, | |
218 | WNM_SLEEP_TFS_RESP_IE_SET)) | |
219 | wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE"); | |
220 | } | |
221 | } | |
222 | ||
223 | ||
224 | static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s, | |
225 | const u8 *frm, u16 key_len_total) | |
226 | { | |
227 | u8 *ptr, *end; | |
228 | u8 gtk_len; | |
229 | ||
230 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid, | |
231 | NULL, NULL); | |
232 | ||
233 | /* Install GTK/IGTK */ | |
234 | ||
235 | /* point to key data field */ | |
236 | ptr = (u8 *) frm + 1 + 2; | |
237 | end = ptr + key_len_total; | |
238 | wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total); | |
239 | ||
240 | if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) { | |
241 | wpa_msg(wpa_s, MSG_INFO, | |
242 | "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled"); | |
243 | return; | |
244 | } | |
245 | ||
246 | while (end - ptr > 1) { | |
247 | if (2 + ptr[1] > end - ptr) { | |
248 | wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element " | |
249 | "length"); | |
250 | if (end > ptr) { | |
251 | wpa_hexdump(MSG_DEBUG, "WNM: Remaining data", | |
252 | ptr, end - ptr); | |
253 | } | |
254 | break; | |
255 | } | |
256 | if (*ptr == WNM_SLEEP_SUBELEM_GTK) { | |
257 | if (ptr[1] < 11 + 5) { | |
258 | wpa_printf(MSG_DEBUG, "WNM: Too short GTK " | |
259 | "subelem"); | |
260 | break; | |
261 | } | |
262 | gtk_len = *(ptr + 4); | |
263 | if (ptr[1] < 11 + gtk_len || | |
264 | gtk_len < 5 || gtk_len > 32) { | |
265 | wpa_printf(MSG_DEBUG, "WNM: Invalid GTK " | |
266 | "subelem"); | |
267 | break; | |
268 | } | |
269 | wpa_wnmsleep_install_key( | |
270 | wpa_s->wpa, | |
271 | WNM_SLEEP_SUBELEM_GTK, | |
272 | ptr); | |
273 | ptr += 13 + gtk_len; | |
274 | #ifdef CONFIG_IEEE80211W | |
275 | } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) { | |
276 | if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) { | |
277 | wpa_printf(MSG_DEBUG, "WNM: Too short IGTK " | |
278 | "subelem"); | |
279 | break; | |
280 | } | |
281 | wpa_wnmsleep_install_key(wpa_s->wpa, | |
282 | WNM_SLEEP_SUBELEM_IGTK, ptr); | |
283 | ptr += 10 + WPA_IGTK_LEN; | |
284 | #endif /* CONFIG_IEEE80211W */ | |
285 | } else | |
286 | break; /* skip the loop */ | |
287 | } | |
288 | } | |
289 | ||
290 | ||
291 | static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s, | |
292 | const u8 *frm, int len) | |
293 | { | |
294 | /* | |
295 | * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data | | |
296 | * WNM-Sleep Mode IE | TFS Response IE | |
297 | */ | |
298 | const u8 *pos = frm; /* point to payload after the action field */ | |
299 | u16 key_len_total; | |
300 | struct wnm_sleep_element *wnmsleep_ie = NULL; | |
301 | /* multiple TFS Resp IE (assuming consecutive) */ | |
302 | const u8 *tfsresp_ie_start = NULL; | |
303 | const u8 *tfsresp_ie_end = NULL; | |
304 | #ifdef CONFIG_OCV | |
305 | const u8 *oci_ie = NULL; | |
306 | u8 oci_ie_len = 0; | |
307 | #endif /* CONFIG_OCV */ | |
308 | size_t left; | |
309 | ||
310 | if (!wpa_s->wnmsleep_used) { | |
311 | wpa_printf(MSG_DEBUG, | |
312 | "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested"); | |
313 | return; | |
314 | } | |
315 | ||
316 | if (len < 3) | |
317 | return; | |
318 | key_len_total = WPA_GET_LE16(frm + 1); | |
319 | ||
320 | wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d", | |
321 | frm[0], key_len_total); | |
322 | left = len - 3; | |
323 | if (key_len_total > left) { | |
324 | wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field"); | |
325 | return; | |
326 | } | |
327 | pos += 3 + key_len_total; | |
328 | while (pos - frm + 1 < len) { | |
329 | u8 ie_len = *(pos + 1); | |
330 | if (2 + ie_len > frm + len - pos) { | |
331 | wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len); | |
332 | break; | |
333 | } | |
334 | wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len); | |
335 | if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4) | |
336 | wnmsleep_ie = (struct wnm_sleep_element *) pos; | |
337 | else if (*pos == WLAN_EID_TFS_RESP) { | |
338 | if (!tfsresp_ie_start) | |
339 | tfsresp_ie_start = pos; | |
340 | tfsresp_ie_end = pos; | |
341 | #ifdef CONFIG_OCV | |
342 | } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 && | |
343 | pos[2] == WLAN_EID_EXT_OCV_OCI) { | |
344 | oci_ie = pos + 3; | |
345 | oci_ie_len = ie_len - 1; | |
346 | #endif /* CONFIG_OCV */ | |
347 | } else | |
348 | wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos); | |
349 | pos += ie_len + 2; | |
350 | } | |
351 | ||
352 | if (!wnmsleep_ie) { | |
353 | wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found"); | |
354 | return; | |
355 | } | |
356 | ||
357 | #ifdef CONFIG_OCV | |
358 | if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT && | |
359 | wpa_sm_ocv_enabled(wpa_s->wpa)) { | |
360 | struct wpa_channel_info ci; | |
361 | ||
362 | if (wpa_drv_channel_info(wpa_s, &ci) != 0) { | |
363 | wpa_msg(wpa_s, MSG_WARNING, | |
364 | "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame"); | |
365 | return; | |
366 | } | |
367 | ||
368 | if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci, | |
369 | channel_width_to_int(ci.chanwidth), | |
370 | ci.seg1_idx) != 0) { | |
371 | wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr); | |
372 | return; | |
373 | } | |
374 | } | |
375 | #endif /* CONFIG_OCV */ | |
376 | ||
377 | wpa_s->wnmsleep_used = 0; | |
378 | ||
379 | if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT || | |
380 | wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) { | |
381 | wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response " | |
382 | "frame (action=%d, intval=%d)", | |
383 | wnmsleep_ie->action_type, wnmsleep_ie->intval); | |
384 | if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) { | |
385 | wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start, | |
386 | tfsresp_ie_end); | |
387 | } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) { | |
388 | wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total); | |
389 | } | |
390 | } else { | |
391 | wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame " | |
392 | "(action=%d, intval=%d)", | |
393 | wnmsleep_ie->action_type, wnmsleep_ie->intval); | |
394 | if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) | |
395 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL, | |
396 | wpa_s->bssid, NULL, NULL); | |
397 | else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) | |
398 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL, | |
399 | wpa_s->bssid, NULL, NULL); | |
400 | } | |
401 | } | |
402 | ||
403 | ||
404 | void wnm_deallocate_memory(struct wpa_supplicant *wpa_s) | |
405 | { | |
406 | int i; | |
407 | ||
408 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
409 | os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot); | |
410 | os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid); | |
411 | } | |
412 | ||
413 | wpa_s->wnm_num_neighbor_report = 0; | |
414 | os_free(wpa_s->wnm_neighbor_report_elements); | |
415 | wpa_s->wnm_neighbor_report_elements = NULL; | |
416 | ||
417 | wpabuf_free(wpa_s->coloc_intf_elems); | |
418 | wpa_s->coloc_intf_elems = NULL; | |
419 | } | |
420 | ||
421 | ||
422 | static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep, | |
423 | u8 id, u8 elen, const u8 *pos) | |
424 | { | |
425 | switch (id) { | |
426 | case WNM_NEIGHBOR_TSF: | |
427 | if (elen < 2 + 2) { | |
428 | wpa_printf(MSG_DEBUG, "WNM: Too short TSF"); | |
429 | break; | |
430 | } | |
431 | rep->tsf_offset = WPA_GET_LE16(pos); | |
432 | rep->beacon_int = WPA_GET_LE16(pos + 2); | |
433 | rep->tsf_present = 1; | |
434 | break; | |
435 | case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING: | |
436 | if (elen < 2) { | |
437 | wpa_printf(MSG_DEBUG, "WNM: Too short condensed " | |
438 | "country string"); | |
439 | break; | |
440 | } | |
441 | os_memcpy(rep->country, pos, 2); | |
442 | rep->country_present = 1; | |
443 | break; | |
444 | case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE: | |
445 | if (elen < 1) { | |
446 | wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition " | |
447 | "candidate"); | |
448 | break; | |
449 | } | |
450 | rep->preference = pos[0]; | |
451 | rep->preference_present = 1; | |
452 | break; | |
453 | case WNM_NEIGHBOR_BSS_TERMINATION_DURATION: | |
454 | if (elen < 10) { | |
455 | wpa_printf(MSG_DEBUG, | |
456 | "WNM: Too short BSS termination duration"); | |
457 | break; | |
458 | } | |
459 | rep->bss_term_tsf = WPA_GET_LE64(pos); | |
460 | rep->bss_term_dur = WPA_GET_LE16(pos + 8); | |
461 | rep->bss_term_present = 1; | |
462 | break; | |
463 | case WNM_NEIGHBOR_BEARING: | |
464 | if (elen < 8) { | |
465 | wpa_printf(MSG_DEBUG, "WNM: Too short neighbor " | |
466 | "bearing"); | |
467 | break; | |
468 | } | |
469 | rep->bearing = WPA_GET_LE16(pos); | |
470 | rep->distance = WPA_GET_LE32(pos + 2); | |
471 | rep->rel_height = WPA_GET_LE16(pos + 2 + 4); | |
472 | rep->bearing_present = 1; | |
473 | break; | |
474 | case WNM_NEIGHBOR_MEASUREMENT_PILOT: | |
475 | if (elen < 1) { | |
476 | wpa_printf(MSG_DEBUG, "WNM: Too short measurement " | |
477 | "pilot"); | |
478 | break; | |
479 | } | |
480 | os_free(rep->meas_pilot); | |
481 | rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot)); | |
482 | if (rep->meas_pilot == NULL) | |
483 | break; | |
484 | rep->meas_pilot->measurement_pilot = pos[0]; | |
485 | rep->meas_pilot->subelem_len = elen - 1; | |
486 | os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1); | |
487 | break; | |
488 | case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES: | |
489 | if (elen < 5) { | |
490 | wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled " | |
491 | "capabilities"); | |
492 | break; | |
493 | } | |
494 | os_memcpy(rep->rm_capab, pos, 5); | |
495 | rep->rm_capab_present = 1; | |
496 | break; | |
497 | case WNM_NEIGHBOR_MULTIPLE_BSSID: | |
498 | if (elen < 1) { | |
499 | wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID"); | |
500 | break; | |
501 | } | |
502 | os_free(rep->mul_bssid); | |
503 | rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid)); | |
504 | if (rep->mul_bssid == NULL) | |
505 | break; | |
506 | rep->mul_bssid->max_bssid_indicator = pos[0]; | |
507 | rep->mul_bssid->subelem_len = elen - 1; | |
508 | os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1); | |
509 | break; | |
510 | } | |
511 | } | |
512 | ||
513 | ||
514 | static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan) | |
515 | { | |
516 | struct wpa_bss *bss = wpa_s->current_bss; | |
517 | const char *country = NULL; | |
518 | int freq; | |
519 | ||
520 | if (bss) { | |
521 | const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY); | |
522 | ||
523 | if (elem && elem[1] >= 2) | |
524 | country = (const char *) (elem + 2); | |
525 | } | |
526 | ||
527 | freq = ieee80211_chan_to_freq(country, op_class, chan); | |
528 | if (freq <= 0 && op_class == 0) { | |
529 | /* | |
530 | * Some APs do not advertise correct operating class | |
531 | * information. Try to determine the most likely operating | |
532 | * frequency based on the channel number. | |
533 | */ | |
534 | if (chan >= 1 && chan <= 13) | |
535 | freq = 2407 + chan * 5; | |
536 | else if (chan == 14) | |
537 | freq = 2484; | |
538 | else if (chan >= 36 && chan <= 169) | |
539 | freq = 5000 + chan * 5; | |
540 | } | |
541 | return freq; | |
542 | } | |
543 | ||
544 | ||
545 | static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s, | |
546 | const u8 *pos, u8 len, | |
547 | struct neighbor_report *rep) | |
548 | { | |
549 | u8 left = len; | |
550 | ||
551 | if (left < 13) { | |
552 | wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report"); | |
553 | return; | |
554 | } | |
555 | ||
556 | os_memcpy(rep->bssid, pos, ETH_ALEN); | |
557 | rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN); | |
558 | rep->regulatory_class = *(pos + 10); | |
559 | rep->channel_number = *(pos + 11); | |
560 | rep->phy_type = *(pos + 12); | |
561 | ||
562 | pos += 13; | |
563 | left -= 13; | |
564 | ||
565 | while (left >= 2) { | |
566 | u8 id, elen; | |
567 | ||
568 | id = *pos++; | |
569 | elen = *pos++; | |
570 | wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen); | |
571 | left -= 2; | |
572 | if (elen > left) { | |
573 | wpa_printf(MSG_DEBUG, | |
574 | "WNM: Truncated neighbor report subelement"); | |
575 | break; | |
576 | } | |
577 | wnm_parse_neighbor_report_elem(rep, id, elen, pos); | |
578 | left -= elen; | |
579 | pos += elen; | |
580 | } | |
581 | ||
582 | rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class, | |
583 | rep->channel_number); | |
584 | } | |
585 | ||
586 | ||
587 | static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s) | |
588 | { | |
589 | unsigned int i; | |
590 | ||
591 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) | |
592 | wpa_s->wnm_neighbor_report_elements[i].acceptable = 0; | |
593 | } | |
594 | ||
595 | ||
596 | static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s) | |
597 | { | |
598 | unsigned int i; | |
599 | struct neighbor_report *nei; | |
600 | ||
601 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
602 | nei = &wpa_s->wnm_neighbor_report_elements[i]; | |
603 | if (nei->acceptable) | |
604 | return wpa_bss_get_bssid(wpa_s, nei->bssid); | |
605 | } | |
606 | ||
607 | return NULL; | |
608 | } | |
609 | ||
610 | ||
611 | #ifdef CONFIG_MBO | |
612 | static struct wpa_bss * | |
613 | get_mbo_transition_candidate(struct wpa_supplicant *wpa_s, | |
614 | enum mbo_transition_reject_reason *reason) | |
615 | { | |
616 | struct wpa_bss *target = NULL; | |
617 | struct wpa_bss_trans_info params; | |
618 | struct wpa_bss_candidate_info *info = NULL; | |
619 | struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements; | |
620 | u8 *first_candidate_bssid = NULL, *pos; | |
621 | unsigned int i; | |
622 | ||
623 | params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason; | |
624 | params.n_candidates = 0; | |
625 | params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN); | |
626 | if (!params.bssid) | |
627 | return NULL; | |
628 | ||
629 | pos = params.bssid; | |
630 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) { | |
631 | if (nei->is_first) | |
632 | first_candidate_bssid = nei->bssid; | |
633 | if (!nei->acceptable) | |
634 | continue; | |
635 | os_memcpy(pos, nei->bssid, ETH_ALEN); | |
636 | pos += ETH_ALEN; | |
637 | params.n_candidates++; | |
638 | } | |
639 | ||
640 | if (!params.n_candidates) | |
641 | goto end; | |
642 | ||
643 | info = wpa_drv_get_bss_trans_status(wpa_s, ¶ms); | |
644 | if (!info) { | |
645 | /* If failed to get candidate BSS transition status from driver, | |
646 | * get the first acceptable candidate from wpa_supplicant. | |
647 | */ | |
648 | target = wpa_bss_get_bssid(wpa_s, params.bssid); | |
649 | goto end; | |
650 | } | |
651 | ||
652 | /* Get the first acceptable candidate from driver */ | |
653 | for (i = 0; i < info->num; i++) { | |
654 | if (info->candidates[i].is_accept) { | |
655 | target = wpa_bss_get_bssid(wpa_s, | |
656 | info->candidates[i].bssid); | |
657 | goto end; | |
658 | } | |
659 | } | |
660 | ||
661 | /* If Disassociation Imminent is set and driver rejects all the | |
662 | * candidate select first acceptable candidate which has | |
663 | * rssi > disassoc_imminent_rssi_threshold | |
664 | */ | |
665 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) { | |
666 | for (i = 0; i < info->num; i++) { | |
667 | target = wpa_bss_get_bssid(wpa_s, | |
668 | info->candidates[i].bssid); | |
669 | if (target && | |
670 | (target->level < | |
671 | wpa_s->conf->disassoc_imminent_rssi_threshold)) | |
672 | continue; | |
673 | goto end; | |
674 | } | |
675 | } | |
676 | ||
677 | /* While sending BTM reject use reason code of the first candidate | |
678 | * received in BTM request frame | |
679 | */ | |
680 | if (reason) { | |
681 | for (i = 0; i < info->num; i++) { | |
682 | if (first_candidate_bssid && | |
683 | os_memcmp(first_candidate_bssid, | |
684 | info->candidates[i].bssid, ETH_ALEN) == 0) | |
685 | { | |
686 | *reason = info->candidates[i].reject_reason; | |
687 | break; | |
688 | } | |
689 | } | |
690 | } | |
691 | ||
692 | target = NULL; | |
693 | ||
694 | end: | |
695 | os_free(params.bssid); | |
696 | if (info) { | |
697 | os_free(info->candidates); | |
698 | os_free(info); | |
699 | } | |
700 | return target; | |
701 | } | |
702 | #endif /* CONFIG_MBO */ | |
703 | ||
704 | ||
705 | static struct wpa_bss * | |
706 | compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs, | |
707 | enum mbo_transition_reject_reason *reason) | |
708 | { | |
709 | u8 i; | |
710 | struct wpa_bss *bss = wpa_s->current_bss; | |
711 | struct wpa_bss *target; | |
712 | ||
713 | if (!bss) | |
714 | return NULL; | |
715 | ||
716 | wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d", | |
717 | MAC2STR(wpa_s->bssid), bss->level); | |
718 | ||
719 | wnm_clear_acceptable(wpa_s); | |
720 | ||
721 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
722 | struct neighbor_report *nei; | |
723 | ||
724 | nei = &wpa_s->wnm_neighbor_report_elements[i]; | |
725 | if (nei->preference_present && nei->preference == 0) { | |
726 | wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR, | |
727 | MAC2STR(nei->bssid)); | |
728 | continue; | |
729 | } | |
730 | ||
731 | target = wpa_bss_get_bssid(wpa_s, nei->bssid); | |
732 | if (!target) { | |
733 | wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR | |
734 | " (pref %d) not found in scan results", | |
735 | MAC2STR(nei->bssid), | |
736 | nei->preference_present ? nei->preference : | |
737 | -1); | |
738 | continue; | |
739 | } | |
740 | ||
741 | if (age_secs) { | |
742 | struct os_reltime now; | |
743 | ||
744 | if (os_get_reltime(&now) == 0 && | |
745 | os_reltime_expired(&now, &target->last_update, | |
746 | age_secs)) { | |
747 | wpa_printf(MSG_DEBUG, | |
748 | "Candidate BSS is more than %ld seconds old", | |
749 | age_secs); | |
750 | continue; | |
751 | } | |
752 | } | |
753 | ||
754 | if (bss->ssid_len != target->ssid_len || | |
755 | os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) { | |
756 | /* | |
757 | * TODO: Could consider allowing transition to another | |
758 | * ESS if PMF was enabled for the association. | |
759 | */ | |
760 | wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR | |
761 | " (pref %d) in different ESS", | |
762 | MAC2STR(nei->bssid), | |
763 | nei->preference_present ? nei->preference : | |
764 | -1); | |
765 | continue; | |
766 | } | |
767 | ||
768 | if (wpa_s->current_ssid && | |
769 | !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid, | |
770 | 1, 0)) { | |
771 | wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR | |
772 | " (pref %d) does not match the current network profile", | |
773 | MAC2STR(nei->bssid), | |
774 | nei->preference_present ? nei->preference : | |
775 | -1); | |
776 | continue; | |
777 | } | |
778 | ||
779 | if (wpa_is_bss_tmp_disallowed(wpa_s, target)) { | |
780 | wpa_printf(MSG_DEBUG, | |
781 | "MBO: Candidate BSS " MACSTR | |
782 | " retry delay is not over yet", | |
783 | MAC2STR(nei->bssid)); | |
784 | continue; | |
785 | } | |
786 | ||
787 | if (target->level < bss->level && target->level < -80) { | |
788 | wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR | |
789 | " (pref %d) does not have sufficient signal level (%d)", | |
790 | MAC2STR(nei->bssid), | |
791 | nei->preference_present ? nei->preference : | |
792 | -1, | |
793 | target->level); | |
794 | continue; | |
795 | } | |
796 | ||
797 | nei->acceptable = 1; | |
798 | } | |
799 | ||
800 | #ifdef CONFIG_MBO | |
801 | if (wpa_s->wnm_mbo_trans_reason_present) | |
802 | target = get_mbo_transition_candidate(wpa_s, reason); | |
803 | else | |
804 | target = get_first_acceptable(wpa_s); | |
805 | #else /* CONFIG_MBO */ | |
806 | target = get_first_acceptable(wpa_s); | |
807 | #endif /* CONFIG_MBO */ | |
808 | ||
809 | if (target) { | |
810 | wpa_printf(MSG_DEBUG, | |
811 | "WNM: Found an acceptable preferred transition candidate BSS " | |
812 | MACSTR " (RSSI %d)", | |
813 | MAC2STR(target->bssid), target->level); | |
814 | } | |
815 | ||
816 | return target; | |
817 | } | |
818 | ||
819 | ||
820 | static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid) | |
821 | { | |
822 | const u8 *ie_a, *ie_b; | |
823 | ||
824 | if (!a || !b) | |
825 | return 0; | |
826 | ||
827 | ie_a = wpa_bss_get_ie(a, eid); | |
828 | ie_b = wpa_bss_get_ie(b, eid); | |
829 | ||
830 | if (!ie_a || !ie_b || ie_a[1] != ie_b[1]) | |
831 | return 0; | |
832 | ||
833 | return os_memcmp(ie_a, ie_b, ie_a[1]) == 0; | |
834 | } | |
835 | ||
836 | ||
837 | static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) | |
838 | { | |
839 | u32 info = 0; | |
840 | ||
841 | info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH; | |
842 | ||
843 | /* | |
844 | * Leave the security and key scope bits unset to indicate that the | |
845 | * security information is not available. | |
846 | */ | |
847 | ||
848 | if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT) | |
849 | info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT; | |
850 | if (bss->caps & WLAN_CAPABILITY_QOS) | |
851 | info |= NEI_REP_BSSID_INFO_QOS; | |
852 | if (bss->caps & WLAN_CAPABILITY_APSD) | |
853 | info |= NEI_REP_BSSID_INFO_APSD; | |
854 | if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT) | |
855 | info |= NEI_REP_BSSID_INFO_RM; | |
856 | if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK) | |
857 | info |= NEI_REP_BSSID_INFO_DELAYED_BA; | |
858 | if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK) | |
859 | info |= NEI_REP_BSSID_INFO_IMM_BA; | |
860 | if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN)) | |
861 | info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN; | |
862 | if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP)) | |
863 | info |= NEI_REP_BSSID_INFO_HT; | |
864 | ||
865 | return info; | |
866 | } | |
867 | ||
868 | ||
869 | static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid, | |
870 | u32 bss_info, u8 op_class, u8 chan, u8 phy_type, | |
871 | u8 pref) | |
872 | { | |
873 | if (wpabuf_len(*buf) + 18 > | |
874 | IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) { | |
875 | wpa_printf(MSG_DEBUG, | |
876 | "WNM: No room in frame for Neighbor Report element"); | |
877 | return -1; | |
878 | } | |
879 | ||
880 | if (wpabuf_resize(buf, 18) < 0) { | |
881 | wpa_printf(MSG_DEBUG, | |
882 | "WNM: Failed to allocate memory for Neighbor Report element"); | |
883 | return -1; | |
884 | } | |
885 | ||
886 | wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT); | |
887 | /* length: 13 for basic neighbor report + 3 for preference subelement */ | |
888 | wpabuf_put_u8(*buf, 16); | |
889 | wpabuf_put_data(*buf, bssid, ETH_ALEN); | |
890 | wpabuf_put_le32(*buf, bss_info); | |
891 | wpabuf_put_u8(*buf, op_class); | |
892 | wpabuf_put_u8(*buf, chan); | |
893 | wpabuf_put_u8(*buf, phy_type); | |
894 | wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE); | |
895 | wpabuf_put_u8(*buf, 1); | |
896 | wpabuf_put_u8(*buf, pref); | |
897 | return 0; | |
898 | } | |
899 | ||
900 | ||
901 | static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s, | |
902 | struct wpa_bss *bss, struct wpabuf **buf, | |
903 | u8 pref) | |
904 | { | |
905 | const u8 *ie; | |
906 | u8 op_class, chan; | |
907 | int sec_chan = 0, vht = 0; | |
908 | enum phy_type phy_type; | |
909 | u32 info; | |
910 | struct ieee80211_ht_operation *ht_oper = NULL; | |
911 | struct ieee80211_vht_operation *vht_oper = NULL; | |
912 | ||
913 | ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION); | |
914 | if (ie && ie[1] >= 2) { | |
915 | ht_oper = (struct ieee80211_ht_operation *) (ie + 2); | |
916 | ||
917 | if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) | |
918 | sec_chan = 1; | |
919 | else if (ht_oper->ht_param & | |
920 | HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) | |
921 | sec_chan = -1; | |
922 | } | |
923 | ||
924 | ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION); | |
925 | if (ie && ie[1] >= 1) { | |
926 | vht_oper = (struct ieee80211_vht_operation *) (ie + 2); | |
927 | ||
928 | if (vht_oper->vht_op_info_chwidth == CHANWIDTH_80MHZ || | |
929 | vht_oper->vht_op_info_chwidth == CHANWIDTH_160MHZ || | |
930 | vht_oper->vht_op_info_chwidth == CHANWIDTH_80P80MHZ) | |
931 | vht = vht_oper->vht_op_info_chwidth; | |
932 | } | |
933 | ||
934 | if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class, | |
935 | &chan) == NUM_HOSTAPD_MODES) { | |
936 | wpa_printf(MSG_DEBUG, | |
937 | "WNM: Cannot determine operating class and channel"); | |
938 | return -2; | |
939 | } | |
940 | ||
941 | phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL), | |
942 | (vht_oper != NULL)); | |
943 | if (phy_type == PHY_TYPE_UNSPECIFIED) { | |
944 | wpa_printf(MSG_DEBUG, | |
945 | "WNM: Cannot determine BSS phy type for Neighbor Report"); | |
946 | return -2; | |
947 | } | |
948 | ||
949 | info = wnm_get_bss_info(wpa_s, bss); | |
950 | ||
951 | return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type, | |
952 | pref); | |
953 | } | |
954 | ||
955 | ||
956 | static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf) | |
957 | { | |
958 | unsigned int i, pref = 255; | |
959 | struct os_reltime now; | |
960 | struct wpa_ssid *ssid = wpa_s->current_ssid; | |
961 | ||
962 | if (!ssid) | |
963 | return; | |
964 | ||
965 | /* | |
966 | * TODO: Define when scan results are no longer valid for the candidate | |
967 | * list. | |
968 | */ | |
969 | os_get_reltime(&now); | |
970 | if (os_reltime_expired(&now, &wpa_s->last_scan, 10)) | |
971 | return; | |
972 | ||
973 | wpa_printf(MSG_DEBUG, | |
974 | "WNM: Add candidate list to BSS Transition Management Response frame"); | |
975 | for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) { | |
976 | struct wpa_bss *bss = wpa_s->last_scan_res[i]; | |
977 | int res; | |
978 | ||
979 | if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) { | |
980 | res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--); | |
981 | if (res == -2) | |
982 | continue; /* could not build entry for BSS */ | |
983 | if (res < 0) | |
984 | break; /* no more room for candidates */ | |
985 | if (pref == 1) | |
986 | break; | |
987 | } | |
988 | } | |
989 | ||
990 | wpa_hexdump_buf(MSG_DEBUG, | |
991 | "WNM: BSS Transition Management Response candidate list", | |
992 | *buf); | |
993 | } | |
994 | ||
995 | ||
996 | #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN | |
997 | ||
998 | static void wnm_send_bss_transition_mgmt_resp( | |
999 | struct wpa_supplicant *wpa_s, u8 dialog_token, | |
1000 | enum bss_trans_mgmt_status_code status, | |
1001 | enum mbo_transition_reject_reason reason, | |
1002 | u8 delay, const u8 *target_bssid) | |
1003 | { | |
1004 | struct wpabuf *buf; | |
1005 | int res; | |
1006 | ||
1007 | wpa_printf(MSG_DEBUG, | |
1008 | "WNM: Send BSS Transition Management Response to " MACSTR | |
1009 | " dialog_token=%u status=%u reason=%u delay=%d", | |
1010 | MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay); | |
1011 | if (!wpa_s->current_bss) { | |
1012 | wpa_printf(MSG_DEBUG, | |
1013 | "WNM: Current BSS not known - drop response"); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | buf = wpabuf_alloc(BTM_RESP_MIN_SIZE); | |
1018 | if (!buf) { | |
1019 | wpa_printf(MSG_DEBUG, | |
1020 | "WNM: Failed to allocate memory for BTM response"); | |
1021 | return; | |
1022 | } | |
1023 | ||
1024 | wpa_s->bss_tm_status = status; | |
1025 | wpas_notify_bss_tm_status(wpa_s); | |
1026 | ||
1027 | wpabuf_put_u8(buf, WLAN_ACTION_WNM); | |
1028 | wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP); | |
1029 | wpabuf_put_u8(buf, dialog_token); | |
1030 | wpabuf_put_u8(buf, status); | |
1031 | wpabuf_put_u8(buf, delay); | |
1032 | if (target_bssid) { | |
1033 | wpabuf_put_data(buf, target_bssid, ETH_ALEN); | |
1034 | } else if (status == WNM_BSS_TM_ACCEPT) { | |
1035 | /* | |
1036 | * P802.11-REVmc clarifies that the Target BSSID field is always | |
1037 | * present when status code is zero, so use a fake value here if | |
1038 | * no BSSID is yet known. | |
1039 | */ | |
1040 | wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN); | |
1041 | } | |
1042 | ||
1043 | if (status == WNM_BSS_TM_ACCEPT) | |
1044 | wnm_add_cand_list(wpa_s, &buf); | |
1045 | ||
1046 | #ifdef CONFIG_MBO | |
1047 | if (status != WNM_BSS_TM_ACCEPT && | |
1048 | wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) { | |
1049 | u8 mbo[10]; | |
1050 | size_t ret; | |
1051 | ||
1052 | ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo), | |
1053 | reason); | |
1054 | if (ret) { | |
1055 | if (wpabuf_resize(&buf, ret) < 0) { | |
1056 | wpabuf_free(buf); | |
1057 | wpa_printf(MSG_DEBUG, | |
1058 | "WNM: Failed to allocate memory for MBO IE"); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | wpabuf_put_data(buf, mbo, ret); | |
1063 | } | |
1064 | } | |
1065 | #endif /* CONFIG_MBO */ | |
1066 | ||
1067 | res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
1068 | wpa_s->own_addr, wpa_s->bssid, | |
1069 | wpabuf_head_u8(buf), wpabuf_len(buf), 0); | |
1070 | if (res < 0) { | |
1071 | wpa_printf(MSG_DEBUG, | |
1072 | "WNM: Failed to send BSS Transition Management Response"); | |
1073 | } | |
1074 | ||
1075 | wpabuf_free(buf); | |
1076 | } | |
1077 | ||
1078 | ||
1079 | static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s, | |
1080 | struct wpa_bss *bss, struct wpa_ssid *ssid, | |
1081 | int after_new_scan) | |
1082 | { | |
1083 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1084 | "WNM: Transition to BSS " MACSTR | |
1085 | " based on BSS Transition Management Request (old BSSID " | |
1086 | MACSTR " after_new_scan=%d)", | |
1087 | MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan); | |
1088 | ||
1089 | /* Send the BSS Management Response - Accept */ | |
1090 | if (wpa_s->wnm_reply) { | |
1091 | wpa_s->wnm_reply = 0; | |
1092 | wpa_printf(MSG_DEBUG, | |
1093 | "WNM: Sending successful BSS Transition Management Response"); | |
1094 | wnm_send_bss_transition_mgmt_resp( | |
1095 | wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT, | |
1096 | MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, | |
1097 | bss->bssid); | |
1098 | } | |
1099 | ||
1100 | if (bss == wpa_s->current_bss) { | |
1101 | wpa_printf(MSG_DEBUG, | |
1102 | "WNM: Already associated with the preferred candidate"); | |
1103 | wnm_deallocate_memory(wpa_s); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | wpa_s->reassociate = 1; | |
1108 | wpa_printf(MSG_DEBUG, "WNM: Issuing connect"); | |
1109 | wpa_supplicant_connect(wpa_s, bss, ssid); | |
1110 | wnm_deallocate_memory(wpa_s); | |
1111 | } | |
1112 | ||
1113 | ||
1114 | int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail) | |
1115 | { | |
1116 | struct wpa_bss *bss; | |
1117 | struct wpa_ssid *ssid = wpa_s->current_ssid; | |
1118 | enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED; | |
1119 | enum mbo_transition_reject_reason reason = | |
1120 | MBO_TRANSITION_REJECT_REASON_UNSPECIFIED; | |
1121 | ||
1122 | if (!wpa_s->wnm_neighbor_report_elements) | |
1123 | return 0; | |
1124 | ||
1125 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1126 | "WNM: Process scan results for BSS Transition Management"); | |
1127 | if (os_reltime_before(&wpa_s->wnm_cand_valid_until, | |
1128 | &wpa_s->scan_trigger_time)) { | |
1129 | wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it"); | |
1130 | wnm_deallocate_memory(wpa_s); | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | if (!wpa_s->current_bss || | |
1135 | os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid, | |
1136 | ETH_ALEN) != 0) { | |
1137 | wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it"); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | /* Compare the Neighbor Report and scan results */ | |
1142 | bss = compare_scan_neighbor_results(wpa_s, 0, &reason); | |
1143 | if (!bss) { | |
1144 | wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found"); | |
1145 | status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES; | |
1146 | goto send_bss_resp_fail; | |
1147 | } | |
1148 | ||
1149 | /* Associate to the network */ | |
1150 | wnm_bss_tm_connect(wpa_s, bss, ssid, 1); | |
1151 | return 1; | |
1152 | ||
1153 | send_bss_resp_fail: | |
1154 | if (!reply_on_fail) | |
1155 | return 0; | |
1156 | ||
1157 | /* Send reject response for all the failures */ | |
1158 | ||
1159 | if (wpa_s->wnm_reply) { | |
1160 | wpa_s->wnm_reply = 0; | |
1161 | wnm_send_bss_transition_mgmt_resp(wpa_s, | |
1162 | wpa_s->wnm_dialog_token, | |
1163 | status, reason, 0, NULL); | |
1164 | } | |
1165 | wnm_deallocate_memory(wpa_s); | |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | ||
1171 | static int cand_pref_compar(const void *a, const void *b) | |
1172 | { | |
1173 | const struct neighbor_report *aa = a; | |
1174 | const struct neighbor_report *bb = b; | |
1175 | ||
1176 | if (!aa->preference_present && !bb->preference_present) | |
1177 | return 0; | |
1178 | if (!aa->preference_present) | |
1179 | return 1; | |
1180 | if (!bb->preference_present) | |
1181 | return -1; | |
1182 | if (bb->preference > aa->preference) | |
1183 | return 1; | |
1184 | if (bb->preference < aa->preference) | |
1185 | return -1; | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | ||
1190 | static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s) | |
1191 | { | |
1192 | if (!wpa_s->wnm_neighbor_report_elements) | |
1193 | return; | |
1194 | qsort(wpa_s->wnm_neighbor_report_elements, | |
1195 | wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report), | |
1196 | cand_pref_compar); | |
1197 | } | |
1198 | ||
1199 | ||
1200 | static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s) | |
1201 | { | |
1202 | unsigned int i; | |
1203 | ||
1204 | wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List"); | |
1205 | if (!wpa_s->wnm_neighbor_report_elements) | |
1206 | return; | |
1207 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
1208 | struct neighbor_report *nei; | |
1209 | ||
1210 | nei = &wpa_s->wnm_neighbor_report_elements[i]; | |
1211 | wpa_printf(MSG_DEBUG, "%u: " MACSTR | |
1212 | " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d", | |
1213 | i, MAC2STR(nei->bssid), nei->bssid_info, | |
1214 | nei->regulatory_class, | |
1215 | nei->channel_number, nei->phy_type, | |
1216 | nei->preference_present ? nei->preference : -1, | |
1217 | nei->freq); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | ||
1222 | static int chan_supported(struct wpa_supplicant *wpa_s, int freq) | |
1223 | { | |
1224 | unsigned int i; | |
1225 | ||
1226 | for (i = 0; i < wpa_s->hw.num_modes; i++) { | |
1227 | struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i]; | |
1228 | int j; | |
1229 | ||
1230 | for (j = 0; j < mode->num_channels; j++) { | |
1231 | struct hostapd_channel_data *chan; | |
1232 | ||
1233 | chan = &mode->channels[j]; | |
1234 | if (chan->freq == freq && | |
1235 | !(chan->flag & HOSTAPD_CHAN_DISABLED)) | |
1236 | return 1; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | ||
1244 | static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s) | |
1245 | { | |
1246 | int *freqs; | |
1247 | int num_freqs = 0; | |
1248 | unsigned int i; | |
1249 | ||
1250 | if (!wpa_s->wnm_neighbor_report_elements) | |
1251 | return; | |
1252 | ||
1253 | if (wpa_s->hw.modes == NULL) | |
1254 | return; | |
1255 | ||
1256 | os_free(wpa_s->next_scan_freqs); | |
1257 | wpa_s->next_scan_freqs = NULL; | |
1258 | ||
1259 | freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int)); | |
1260 | if (freqs == NULL) | |
1261 | return; | |
1262 | ||
1263 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
1264 | struct neighbor_report *nei; | |
1265 | ||
1266 | nei = &wpa_s->wnm_neighbor_report_elements[i]; | |
1267 | if (nei->freq <= 0) { | |
1268 | wpa_printf(MSG_DEBUG, | |
1269 | "WNM: Unknown neighbor operating frequency for " | |
1270 | MACSTR " - scan all channels", | |
1271 | MAC2STR(nei->bssid)); | |
1272 | os_free(freqs); | |
1273 | return; | |
1274 | } | |
1275 | if (chan_supported(wpa_s, nei->freq)) | |
1276 | add_freq(freqs, &num_freqs, nei->freq); | |
1277 | } | |
1278 | ||
1279 | if (num_freqs == 0) { | |
1280 | os_free(freqs); | |
1281 | return; | |
1282 | } | |
1283 | ||
1284 | wpa_printf(MSG_DEBUG, | |
1285 | "WNM: Scan %d frequencies based on transition candidate list", | |
1286 | num_freqs); | |
1287 | wpa_s->next_scan_freqs = freqs; | |
1288 | } | |
1289 | ||
1290 | ||
1291 | static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s) | |
1292 | { | |
1293 | struct wpa_scan_results *scan_res; | |
1294 | struct wpa_bss *bss; | |
1295 | struct wpa_ssid *ssid = wpa_s->current_ssid; | |
1296 | u8 i, found = 0; | |
1297 | size_t j; | |
1298 | ||
1299 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1300 | "WNM: Fetch current scan results from the driver for checking transition candidates"); | |
1301 | scan_res = wpa_drv_get_scan_results2(wpa_s); | |
1302 | if (!scan_res) { | |
1303 | wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results"); | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | if (scan_res->fetch_time.sec == 0) | |
1308 | os_get_reltime(&scan_res->fetch_time); | |
1309 | ||
1310 | filter_scan_res(wpa_s, scan_res); | |
1311 | ||
1312 | for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) { | |
1313 | struct neighbor_report *nei; | |
1314 | ||
1315 | nei = &wpa_s->wnm_neighbor_report_elements[i]; | |
1316 | if (nei->preference_present && nei->preference == 0) | |
1317 | continue; | |
1318 | ||
1319 | for (j = 0; j < scan_res->num; j++) { | |
1320 | struct wpa_scan_res *res; | |
1321 | const u8 *ssid_ie; | |
1322 | ||
1323 | res = scan_res->res[j]; | |
1324 | if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 || | |
1325 | res->age > WNM_SCAN_RESULT_AGE * 1000) | |
1326 | continue; | |
1327 | bss = wpa_s->current_bss; | |
1328 | ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID); | |
1329 | if (bss && ssid_ie && | |
1330 | (bss->ssid_len != ssid_ie[1] || | |
1331 | os_memcmp(bss->ssid, ssid_ie + 2, | |
1332 | bss->ssid_len) != 0)) | |
1333 | continue; | |
1334 | ||
1335 | /* Potential candidate found */ | |
1336 | found = 1; | |
1337 | scan_snr(res); | |
1338 | scan_est_throughput(wpa_s, res); | |
1339 | wpa_bss_update_scan_res(wpa_s, res, | |
1340 | &scan_res->fetch_time); | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | wpa_scan_results_free(scan_res); | |
1345 | if (!found) { | |
1346 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1347 | "WNM: No transition candidate matches existing scan results"); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL); | |
1352 | if (!bss) { | |
1353 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1354 | "WNM: Comparison of scan results against transition candidates did not find matches"); | |
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | /* Associate to the network */ | |
1359 | wnm_bss_tm_connect(wpa_s, bss, ssid, 0); | |
1360 | return 1; | |
1361 | } | |
1362 | ||
1363 | ||
1364 | static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s, | |
1365 | const u8 *pos, const u8 *end, | |
1366 | int reply) | |
1367 | { | |
1368 | unsigned int beacon_int; | |
1369 | u8 valid_int; | |
1370 | #ifdef CONFIG_MBO | |
1371 | const u8 *vendor; | |
1372 | #endif /* CONFIG_MBO */ | |
1373 | ||
1374 | if (wpa_s->conf->disable_btm) | |
1375 | return; | |
1376 | ||
1377 | if (end - pos < 5) | |
1378 | return; | |
1379 | ||
1380 | #ifdef CONFIG_MBO | |
1381 | wpa_s->wnm_mbo_trans_reason_present = 0; | |
1382 | wpa_s->wnm_mbo_transition_reason = 0; | |
1383 | #endif /* CONFIG_MBO */ | |
1384 | ||
1385 | if (wpa_s->current_bss) | |
1386 | beacon_int = wpa_s->current_bss->beacon_int; | |
1387 | else | |
1388 | beacon_int = 100; /* best guess */ | |
1389 | ||
1390 | wpa_s->wnm_dialog_token = pos[0]; | |
1391 | wpa_s->wnm_mode = pos[1]; | |
1392 | wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2); | |
1393 | valid_int = pos[4]; | |
1394 | wpa_s->wnm_reply = reply; | |
1395 | ||
1396 | wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: " | |
1397 | "dialog_token=%u request_mode=0x%x " | |
1398 | "disassoc_timer=%u validity_interval=%u", | |
1399 | wpa_s->wnm_dialog_token, wpa_s->wnm_mode, | |
1400 | wpa_s->wnm_dissoc_timer, valid_int); | |
1401 | ||
1402 | #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS) | |
1403 | if (wpa_s->reject_btm_req_reason) { | |
1404 | wpa_printf(MSG_INFO, | |
1405 | "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d", | |
1406 | wpa_s->reject_btm_req_reason); | |
1407 | wnm_send_bss_transition_mgmt_resp( | |
1408 | wpa_s, wpa_s->wnm_dialog_token, | |
1409 | wpa_s->reject_btm_req_reason, | |
1410 | MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL); | |
1411 | return; | |
1412 | } | |
1413 | #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */ | |
1414 | ||
1415 | pos += 5; | |
1416 | ||
1417 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) { | |
1418 | if (end - pos < 12) { | |
1419 | wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request"); | |
1420 | return; | |
1421 | } | |
1422 | os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12); | |
1423 | pos += 12; /* BSS Termination Duration */ | |
1424 | } | |
1425 | ||
1426 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) { | |
1427 | char url[256]; | |
1428 | ||
1429 | if (end - pos < 1 || 1 + pos[0] > end - pos) { | |
1430 | wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition " | |
1431 | "Management Request (URL)"); | |
1432 | return; | |
1433 | } | |
1434 | os_memcpy(url, pos + 1, pos[0]); | |
1435 | url[pos[0]] = '\0'; | |
1436 | pos += 1 + pos[0]; | |
1437 | ||
1438 | wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s", | |
1439 | wpa_sm_pmf_enabled(wpa_s->wpa), | |
1440 | wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url); | |
1441 | } | |
1442 | ||
1443 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) { | |
1444 | wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - " | |
1445 | "Disassociation Timer %u", wpa_s->wnm_dissoc_timer); | |
1446 | if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) { | |
1447 | /* TODO: mark current BSS less preferred for | |
1448 | * selection */ | |
1449 | wpa_printf(MSG_DEBUG, "Trying to find another BSS"); | |
1450 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | #ifdef CONFIG_MBO | |
1455 | vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC); | |
1456 | if (vendor) | |
1457 | wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]); | |
1458 | #endif /* CONFIG_MBO */ | |
1459 | ||
1460 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) { | |
1461 | unsigned int valid_ms; | |
1462 | ||
1463 | wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available"); | |
1464 | wnm_deallocate_memory(wpa_s); | |
1465 | wpa_s->wnm_neighbor_report_elements = os_calloc( | |
1466 | WNM_MAX_NEIGHBOR_REPORT, | |
1467 | sizeof(struct neighbor_report)); | |
1468 | if (wpa_s->wnm_neighbor_report_elements == NULL) | |
1469 | return; | |
1470 | ||
1471 | while (end - pos >= 2 && | |
1472 | wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT) | |
1473 | { | |
1474 | u8 tag = *pos++; | |
1475 | u8 len = *pos++; | |
1476 | ||
1477 | wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u", | |
1478 | tag); | |
1479 | if (len > end - pos) { | |
1480 | wpa_printf(MSG_DEBUG, "WNM: Truncated request"); | |
1481 | return; | |
1482 | } | |
1483 | if (tag == WLAN_EID_NEIGHBOR_REPORT) { | |
1484 | struct neighbor_report *rep; | |
1485 | rep = &wpa_s->wnm_neighbor_report_elements[ | |
1486 | wpa_s->wnm_num_neighbor_report]; | |
1487 | wnm_parse_neighbor_report(wpa_s, pos, len, rep); | |
1488 | wpa_s->wnm_num_neighbor_report++; | |
1489 | #ifdef CONFIG_MBO | |
1490 | if (wpa_s->wnm_mbo_trans_reason_present && | |
1491 | wpa_s->wnm_num_neighbor_report == 1) { | |
1492 | rep->is_first = 1; | |
1493 | wpa_printf(MSG_DEBUG, | |
1494 | "WNM: First transition candidate is " | |
1495 | MACSTR, MAC2STR(rep->bssid)); | |
1496 | } | |
1497 | #endif /* CONFIG_MBO */ | |
1498 | } | |
1499 | ||
1500 | pos += len; | |
1501 | } | |
1502 | ||
1503 | if (!wpa_s->wnm_num_neighbor_report) { | |
1504 | wpa_printf(MSG_DEBUG, | |
1505 | "WNM: Candidate list included bit is set, but no candidates found"); | |
1506 | wnm_send_bss_transition_mgmt_resp( | |
1507 | wpa_s, wpa_s->wnm_dialog_token, | |
1508 | WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES, | |
1509 | MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, | |
1510 | NULL); | |
1511 | return; | |
1512 | } | |
1513 | ||
1514 | wnm_sort_cand_list(wpa_s); | |
1515 | wnm_dump_cand_list(wpa_s); | |
1516 | valid_ms = valid_int * beacon_int * 128 / 125; | |
1517 | wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms", | |
1518 | valid_ms); | |
1519 | os_get_reltime(&wpa_s->wnm_cand_valid_until); | |
1520 | wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000; | |
1521 | wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000; | |
1522 | wpa_s->wnm_cand_valid_until.sec += | |
1523 | wpa_s->wnm_cand_valid_until.usec / 1000000; | |
1524 | wpa_s->wnm_cand_valid_until.usec %= 1000000; | |
1525 | os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN); | |
1526 | ||
1527 | /* | |
1528 | * Fetch the latest scan results from the kernel and check for | |
1529 | * candidates based on those results first. This can help in | |
1530 | * finding more up-to-date information should the driver has | |
1531 | * done some internal scanning operations after the last scan | |
1532 | * result update in wpa_supplicant. | |
1533 | */ | |
1534 | if (wnm_fetch_scan_results(wpa_s) > 0) | |
1535 | return; | |
1536 | ||
1537 | /* | |
1538 | * Try to use previously received scan results, if they are | |
1539 | * recent enough to use for a connection. | |
1540 | */ | |
1541 | if (wpa_s->last_scan_res_used > 0) { | |
1542 | struct os_reltime now; | |
1543 | ||
1544 | os_get_reltime(&now); | |
1545 | if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) { | |
1546 | wpa_printf(MSG_DEBUG, | |
1547 | "WNM: Try to use recent scan results"); | |
1548 | if (wnm_scan_process(wpa_s, 0) > 0) | |
1549 | return; | |
1550 | wpa_printf(MSG_DEBUG, | |
1551 | "WNM: No match in previous scan results - try a new scan"); | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | wnm_set_scan_freqs(wpa_s); | |
1556 | if (wpa_s->wnm_num_neighbor_report == 1) { | |
1557 | os_memcpy(wpa_s->next_scan_bssid, | |
1558 | wpa_s->wnm_neighbor_report_elements[0].bssid, | |
1559 | ETH_ALEN); | |
1560 | wpa_printf(MSG_DEBUG, | |
1561 | "WNM: Scan only for a specific BSSID since there is only a single candidate " | |
1562 | MACSTR, MAC2STR(wpa_s->next_scan_bssid)); | |
1563 | } | |
1564 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
1565 | } else if (reply) { | |
1566 | enum bss_trans_mgmt_status_code status; | |
1567 | if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) | |
1568 | status = WNM_BSS_TM_ACCEPT; | |
1569 | else { | |
1570 | wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates"); | |
1571 | status = WNM_BSS_TM_REJECT_UNSPECIFIED; | |
1572 | } | |
1573 | wnm_send_bss_transition_mgmt_resp( | |
1574 | wpa_s, wpa_s->wnm_dialog_token, status, | |
1575 | MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | ||
1580 | #define BTM_QUERY_MIN_SIZE 4 | |
1581 | ||
1582 | int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s, | |
1583 | u8 query_reason, | |
1584 | const char *btm_candidates, | |
1585 | int cand_list) | |
1586 | { | |
1587 | struct wpabuf *buf; | |
1588 | int ret; | |
1589 | ||
1590 | wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to " | |
1591 | MACSTR " query_reason=%u%s", | |
1592 | MAC2STR(wpa_s->bssid), query_reason, | |
1593 | cand_list ? " candidate list" : ""); | |
1594 | ||
1595 | buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE); | |
1596 | if (!buf) | |
1597 | return -1; | |
1598 | ||
1599 | wpabuf_put_u8(buf, WLAN_ACTION_WNM); | |
1600 | wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY); | |
1601 | wpabuf_put_u8(buf, 1); | |
1602 | wpabuf_put_u8(buf, query_reason); | |
1603 | ||
1604 | if (cand_list) | |
1605 | wnm_add_cand_list(wpa_s, &buf); | |
1606 | ||
1607 | if (btm_candidates) { | |
1608 | const size_t max_len = 1000; | |
1609 | ||
1610 | ret = wpabuf_resize(&buf, max_len); | |
1611 | if (ret < 0) { | |
1612 | wpabuf_free(buf); | |
1613 | return ret; | |
1614 | } | |
1615 | ||
1616 | ret = ieee802_11_parse_candidate_list(btm_candidates, | |
1617 | wpabuf_put(buf, 0), | |
1618 | max_len); | |
1619 | if (ret < 0) { | |
1620 | wpabuf_free(buf); | |
1621 | return ret; | |
1622 | } | |
1623 | ||
1624 | wpabuf_put(buf, ret); | |
1625 | } | |
1626 | ||
1627 | ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
1628 | wpa_s->own_addr, wpa_s->bssid, | |
1629 | wpabuf_head_u8(buf), wpabuf_len(buf), 0); | |
1630 | ||
1631 | wpabuf_free(buf); | |
1632 | return ret; | |
1633 | } | |
1634 | ||
1635 | ||
1636 | static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s, | |
1637 | const u8 *sa, const u8 *data, | |
1638 | int len) | |
1639 | { | |
1640 | const u8 *pos, *end, *next; | |
1641 | u8 ie, ie_len; | |
1642 | ||
1643 | pos = data; | |
1644 | end = data + len; | |
1645 | ||
1646 | while (end - pos > 1) { | |
1647 | ie = *pos++; | |
1648 | ie_len = *pos++; | |
1649 | wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u", | |
1650 | ie, ie_len); | |
1651 | if (ie_len > end - pos) { | |
1652 | wpa_printf(MSG_DEBUG, "WNM: Not enough room for " | |
1653 | "subelement"); | |
1654 | break; | |
1655 | } | |
1656 | next = pos + ie_len; | |
1657 | if (ie_len < 4) { | |
1658 | pos = next; | |
1659 | continue; | |
1660 | } | |
1661 | wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u", | |
1662 | WPA_GET_BE24(pos), pos[3]); | |
1663 | ||
1664 | #ifdef CONFIG_HS20 | |
1665 | if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 && | |
1666 | WPA_GET_BE24(pos) == OUI_WFA && | |
1667 | pos[3] == HS20_WNM_SUB_REM_NEEDED) { | |
1668 | /* Subscription Remediation subelement */ | |
1669 | const u8 *ie_end; | |
1670 | u8 url_len; | |
1671 | char *url; | |
1672 | u8 osu_method; | |
1673 | ||
1674 | wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation " | |
1675 | "subelement"); | |
1676 | ie_end = pos + ie_len; | |
1677 | pos += 4; | |
1678 | url_len = *pos++; | |
1679 | if (url_len == 0) { | |
1680 | wpa_printf(MSG_DEBUG, "WNM: No Server URL included"); | |
1681 | url = NULL; | |
1682 | osu_method = 1; | |
1683 | } else { | |
1684 | if (url_len + 1 > ie_end - pos) { | |
1685 | wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)", | |
1686 | url_len, | |
1687 | (int) (ie_end - pos)); | |
1688 | break; | |
1689 | } | |
1690 | url = os_malloc(url_len + 1); | |
1691 | if (url == NULL) | |
1692 | break; | |
1693 | os_memcpy(url, pos, url_len); | |
1694 | url[url_len] = '\0'; | |
1695 | osu_method = pos[url_len]; | |
1696 | } | |
1697 | hs20_rx_subscription_remediation(wpa_s, url, | |
1698 | osu_method); | |
1699 | os_free(url); | |
1700 | pos = next; | |
1701 | continue; | |
1702 | } | |
1703 | ||
1704 | if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 && | |
1705 | WPA_GET_BE24(pos) == OUI_WFA && | |
1706 | pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) { | |
1707 | const u8 *ie_end; | |
1708 | u8 url_len; | |
1709 | char *url; | |
1710 | u8 code; | |
1711 | u16 reauth_delay; | |
1712 | ||
1713 | ie_end = pos + ie_len; | |
1714 | pos += 4; | |
1715 | code = *pos++; | |
1716 | reauth_delay = WPA_GET_LE16(pos); | |
1717 | pos += 2; | |
1718 | url_len = *pos++; | |
1719 | wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication " | |
1720 | "Imminent - Reason Code %u " | |
1721 | "Re-Auth Delay %u URL Length %u", | |
1722 | code, reauth_delay, url_len); | |
1723 | if (url_len > ie_end - pos) | |
1724 | break; | |
1725 | url = os_malloc(url_len + 1); | |
1726 | if (url == NULL) | |
1727 | break; | |
1728 | os_memcpy(url, pos, url_len); | |
1729 | url[url_len] = '\0'; | |
1730 | hs20_rx_deauth_imminent_notice(wpa_s, code, | |
1731 | reauth_delay, url); | |
1732 | os_free(url); | |
1733 | pos = next; | |
1734 | continue; | |
1735 | } | |
1736 | ||
1737 | if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 && | |
1738 | WPA_GET_BE24(pos) == OUI_WFA && | |
1739 | pos[3] == HS20_WNM_T_C_ACCEPTANCE) { | |
1740 | const u8 *ie_end; | |
1741 | u8 url_len; | |
1742 | char *url; | |
1743 | ||
1744 | ie_end = pos + ie_len; | |
1745 | pos += 4; | |
1746 | url_len = *pos++; | |
1747 | wpa_printf(MSG_DEBUG, | |
1748 | "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)", | |
1749 | url_len); | |
1750 | if (url_len > ie_end - pos) | |
1751 | break; | |
1752 | url = os_malloc(url_len + 1); | |
1753 | if (!url) | |
1754 | break; | |
1755 | os_memcpy(url, pos, url_len); | |
1756 | url[url_len] = '\0'; | |
1757 | hs20_rx_t_c_acceptance(wpa_s, url); | |
1758 | os_free(url); | |
1759 | pos = next; | |
1760 | continue; | |
1761 | } | |
1762 | #endif /* CONFIG_HS20 */ | |
1763 | ||
1764 | pos = next; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | ||
1769 | static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s, | |
1770 | const u8 *sa, const u8 *frm, int len) | |
1771 | { | |
1772 | const u8 *pos, *end; | |
1773 | u8 dialog_token, type; | |
1774 | ||
1775 | /* Dialog Token [1] | Type [1] | Subelements */ | |
1776 | ||
1777 | if (len < 2 || sa == NULL) | |
1778 | return; | |
1779 | end = frm + len; | |
1780 | pos = frm; | |
1781 | dialog_token = *pos++; | |
1782 | type = *pos++; | |
1783 | ||
1784 | wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request " | |
1785 | "(dialog_token %u type %u sa " MACSTR ")", | |
1786 | dialog_token, type, MAC2STR(sa)); | |
1787 | wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements", | |
1788 | pos, end - pos); | |
1789 | ||
1790 | if (wpa_s->wpa_state != WPA_COMPLETED || | |
1791 | os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) { | |
1792 | wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not " | |
1793 | "from our AP - ignore it"); | |
1794 | return; | |
1795 | } | |
1796 | ||
1797 | switch (type) { | |
1798 | case 1: | |
1799 | ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos); | |
1800 | break; | |
1801 | default: | |
1802 | wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown " | |
1803 | "WNM-Notification type %u", type); | |
1804 | break; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | ||
1809 | static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s, | |
1810 | const u8 *sa, const u8 *frm, | |
1811 | int len) | |
1812 | { | |
1813 | u8 dialog_token, req_info, auto_report, timeout; | |
1814 | ||
1815 | if (!wpa_s->conf->coloc_intf_reporting) | |
1816 | return; | |
1817 | ||
1818 | /* Dialog Token [1] | Request Info [1] */ | |
1819 | ||
1820 | if (len < 2) | |
1821 | return; | |
1822 | dialog_token = frm[0]; | |
1823 | req_info = frm[1]; | |
1824 | auto_report = req_info & 0x03; | |
1825 | timeout = req_info >> 2; | |
1826 | ||
1827 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1828 | "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")", | |
1829 | dialog_token, auto_report, timeout, MAC2STR(sa)); | |
1830 | ||
1831 | if (dialog_token == 0) | |
1832 | return; /* only nonzero values are used for request */ | |
1833 | ||
1834 | if (wpa_s->wpa_state != WPA_COMPLETED || | |
1835 | os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) { | |
1836 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1837 | "WNM: Collocated Interference Request frame not from current AP - ignore it"); | |
1838 | return; | |
1839 | } | |
1840 | ||
1841 | wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u", | |
1842 | dialog_token, auto_report, timeout); | |
1843 | wpa_s->coloc_intf_dialog_token = dialog_token; | |
1844 | wpa_s->coloc_intf_auto_report = auto_report; | |
1845 | wpa_s->coloc_intf_timeout = timeout; | |
1846 | } | |
1847 | ||
1848 | ||
1849 | void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s, | |
1850 | const struct ieee80211_mgmt *mgmt, size_t len) | |
1851 | { | |
1852 | const u8 *pos, *end; | |
1853 | u8 act; | |
1854 | ||
1855 | if (len < IEEE80211_HDRLEN + 2) | |
1856 | return; | |
1857 | ||
1858 | pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1; | |
1859 | act = *pos++; | |
1860 | end = ((const u8 *) mgmt) + len; | |
1861 | ||
1862 | wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR, | |
1863 | act, MAC2STR(mgmt->sa)); | |
1864 | if (wpa_s->wpa_state < WPA_ASSOCIATED || | |
1865 | os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) { | |
1866 | wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action " | |
1867 | "frame"); | |
1868 | return; | |
1869 | } | |
1870 | ||
1871 | switch (act) { | |
1872 | case WNM_BSS_TRANS_MGMT_REQ: | |
1873 | ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end, | |
1874 | !(mgmt->da[0] & 0x01)); | |
1875 | break; | |
1876 | case WNM_SLEEP_MODE_RESP: | |
1877 | ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos); | |
1878 | break; | |
1879 | case WNM_NOTIFICATION_REQ: | |
1880 | ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos); | |
1881 | break; | |
1882 | case WNM_COLLOCATED_INTERFERENCE_REQ: | |
1883 | ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos, | |
1884 | end - pos); | |
1885 | break; | |
1886 | default: | |
1887 | wpa_printf(MSG_ERROR, "WNM: Unknown request"); | |
1888 | break; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | ||
1893 | int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token, | |
1894 | const struct wpabuf *elems) | |
1895 | { | |
1896 | struct wpabuf *buf; | |
1897 | int ret; | |
1898 | ||
1899 | if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems) | |
1900 | return -1; | |
1901 | ||
1902 | wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to " | |
1903 | MACSTR " (dialog token %u)", | |
1904 | MAC2STR(wpa_s->bssid), dialog_token); | |
1905 | ||
1906 | buf = wpabuf_alloc(3 + wpabuf_len(elems)); | |
1907 | if (!buf) | |
1908 | return -1; | |
1909 | ||
1910 | wpabuf_put_u8(buf, WLAN_ACTION_WNM); | |
1911 | wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT); | |
1912 | wpabuf_put_u8(buf, dialog_token); | |
1913 | wpabuf_put_buf(buf, elems); | |
1914 | ||
1915 | ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
1916 | wpa_s->own_addr, wpa_s->bssid, | |
1917 | wpabuf_head_u8(buf), wpabuf_len(buf), 0); | |
1918 | wpabuf_free(buf); | |
1919 | return ret; | |
1920 | } | |
1921 | ||
1922 | ||
1923 | void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s, | |
1924 | struct wpabuf *elems) | |
1925 | { | |
1926 | wpabuf_free(wpa_s->coloc_intf_elems); | |
1927 | if (elems && wpabuf_len(elems) == 0) { | |
1928 | wpabuf_free(elems); | |
1929 | elems = NULL; | |
1930 | } | |
1931 | wpa_s->coloc_intf_elems = elems; | |
1932 | ||
1933 | if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems && | |
1934 | wpa_s->coloc_intf_dialog_token && | |
1935 | (wpa_s->coloc_intf_auto_report == 1 || | |
1936 | wpa_s->coloc_intf_auto_report == 3)) { | |
1937 | /* TODO: Check that there has not been less than | |
1938 | * wpa_s->coloc_intf_timeout * 200 TU from the last report. | |
1939 | */ | |
1940 | wnm_send_coloc_intf_report(wpa_s, | |
1941 | wpa_s->coloc_intf_dialog_token, | |
1942 | wpa_s->coloc_intf_elems); | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | ||
1947 | void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s) | |
1948 | { | |
1949 | #ifdef CONFIG_WNM | |
1950 | wpa_s->coloc_intf_dialog_token = 0; | |
1951 | wpa_s->coloc_intf_auto_report = 0; | |
1952 | #endif /* CONFIG_WNM */ | |
1953 | } |