1 /*
2 * hostapd / IEEE 802.11 Management
3 * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
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 "hostapd.h"
14 #include "sta_info.h"
15 #include "ap_config.h"
16 #include "ap_drv_ops.h"
17 #include "ieee802_11.h"
18
19
20 #ifdef CONFIG_IEEE80211W
21
hostapd_eid_assoc_comeback_time(struct hostapd_data * hapd,struct sta_info * sta,u8 * eid)22 u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
23 struct sta_info *sta, u8 *eid)
24 {
25 u8 *pos = eid;
26 u32 timeout, tu;
27 struct os_reltime now, passed;
28
29 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
30 *pos++ = 5;
31 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
32 os_get_reltime(&now);
33 os_reltime_sub(&now, &sta->sa_query_start, &passed);
34 tu = (passed.sec * 1000000 + passed.usec) / 1024;
35 if (hapd->conf->assoc_sa_query_max_timeout > tu)
36 timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
37 else
38 timeout = 0;
39 if (timeout < hapd->conf->assoc_sa_query_max_timeout)
40 timeout++; /* add some extra time for local timers */
41 WPA_PUT_LE32(pos, timeout);
42 pos += 4;
43
44 return pos;
45 }
46
47
48 /* MLME-SAQuery.request */
ieee802_11_send_sa_query_req(struct hostapd_data * hapd,const u8 * addr,const u8 * trans_id)49 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
50 const u8 *addr, const u8 *trans_id)
51 {
52 struct ieee80211_mgmt mgmt;
53 u8 *end;
54
55 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to "
56 MACSTR, MAC2STR(addr));
57 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
58 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
59
60 os_memset(&mgmt, 0, sizeof(mgmt));
61 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
62 WLAN_FC_STYPE_ACTION);
63 os_memcpy(mgmt.da, addr, ETH_ALEN);
64 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
65 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
66 mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
67 mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
68 os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
69 WLAN_SA_QUERY_TR_ID_LEN);
70 end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
71 if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0)
72 wpa_printf(MSG_INFO, "ieee802_11_send_sa_query_req: send failed");
73 }
74
75
ieee802_11_send_sa_query_resp(struct hostapd_data * hapd,const u8 * sa,const u8 * trans_id)76 static void ieee802_11_send_sa_query_resp(struct hostapd_data *hapd,
77 const u8 *sa, const u8 *trans_id)
78 {
79 struct sta_info *sta;
80 struct ieee80211_mgmt resp;
81 u8 *end;
82
83 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from "
84 MACSTR, MAC2STR(sa));
85 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
86 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
87
88 sta = ap_get_sta(hapd, sa);
89 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
90 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request "
91 "from unassociated STA " MACSTR, MAC2STR(sa));
92 return;
93 }
94
95 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to "
96 MACSTR, MAC2STR(sa));
97
98 os_memset(&resp, 0, sizeof(resp));
99 resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
100 WLAN_FC_STYPE_ACTION);
101 os_memcpy(resp.da, sa, ETH_ALEN);
102 os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN);
103 os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN);
104 resp.u.action.category = WLAN_ACTION_SA_QUERY;
105 resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE;
106 os_memcpy(resp.u.action.u.sa_query_req.trans_id, trans_id,
107 WLAN_SA_QUERY_TR_ID_LEN);
108 end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
109 if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp, 0) < 0)
110 wpa_printf(MSG_INFO, "ieee80211_mgmt_sa_query_request: send failed");
111 }
112
113
ieee802_11_sa_query_action(struct hostapd_data * hapd,const u8 * sa,const u8 action_type,const u8 * trans_id)114 void ieee802_11_sa_query_action(struct hostapd_data *hapd, const u8 *sa,
115 const u8 action_type, const u8 *trans_id)
116 {
117 struct sta_info *sta;
118 int i;
119
120 if (action_type == WLAN_SA_QUERY_REQUEST) {
121 ieee802_11_send_sa_query_resp(hapd, sa, trans_id);
122 return;
123 }
124
125 if (action_type != WLAN_SA_QUERY_RESPONSE) {
126 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
127 "Action %d", action_type);
128 return;
129 }
130
131 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from "
132 MACSTR, MAC2STR(sa));
133 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
134 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
135
136 /* MLME-SAQuery.confirm */
137
138 sta = ap_get_sta(hapd, sa);
139 if (sta == NULL || sta->sa_query_trans_id == NULL) {
140 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
141 "pending SA Query request found");
142 return;
143 }
144
145 for (i = 0; i < sta->sa_query_count; i++) {
146 if (os_memcmp(sta->sa_query_trans_id +
147 i * WLAN_SA_QUERY_TR_ID_LEN,
148 trans_id, WLAN_SA_QUERY_TR_ID_LEN) == 0)
149 break;
150 }
151
152 if (i >= sta->sa_query_count) {
153 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
154 "transaction identifier found");
155 return;
156 }
157
158 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
159 HOSTAPD_LEVEL_DEBUG,
160 "Reply to pending SA Query received");
161 ap_sta_stop_sa_query(hapd, sta);
162 }
163
164 #endif /* CONFIG_IEEE80211W */
165
166
hostapd_ext_capab_byte(struct hostapd_data * hapd,u8 * pos,int idx)167 static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
168 {
169 *pos = 0x00;
170
171 switch (idx) {
172 case 0: /* Bits 0-7 */
173 if (hapd->iconf->obss_interval)
174 *pos |= 0x01; /* Bit 0 - Coexistence management */
175 break;
176 case 1: /* Bits 8-15 */
177 break;
178 case 2: /* Bits 16-23 */
179 if (hapd->conf->wnm_sleep_mode)
180 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */
181 if (hapd->conf->bss_transition)
182 *pos |= 0x08; /* Bit 19 - BSS Transition */
183 break;
184 case 3: /* Bits 24-31 */
185 #ifdef CONFIG_WNM
186 *pos |= 0x02; /* Bit 25 - SSID List */
187 #endif /* CONFIG_WNM */
188 if (hapd->conf->time_advertisement == 2)
189 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */
190 if (hapd->conf->interworking)
191 *pos |= 0x80; /* Bit 31 - Interworking */
192 break;
193 case 4: /* Bits 32-39 */
194 if (hapd->conf->qos_map_set_len)
195 *pos |= 0x01; /* Bit 32 - QoS Map */
196 if (hapd->conf->tdls & TDLS_PROHIBIT)
197 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */
198 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) {
199 /* Bit 39 - TDLS Channel Switching Prohibited */
200 *pos |= 0x80;
201 }
202 break;
203 case 5: /* Bits 40-47 */
204 #ifdef CONFIG_HS20
205 if (hapd->conf->hs20)
206 *pos |= 0x40; /* Bit 46 - WNM-Notification */
207 #endif /* CONFIG_HS20 */
208 break;
209 case 6: /* Bits 48-55 */
210 if (hapd->conf->ssid.utf8_ssid)
211 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */
212 break;
213 }
214 }
215
216
hostapd_eid_ext_capab(struct hostapd_data * hapd,u8 * eid)217 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
218 {
219 u8 *pos = eid;
220 u8 len = 0, i;
221
222 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH))
223 len = 5;
224 if (len < 4 && hapd->conf->interworking)
225 len = 4;
226 if (len < 3 && hapd->conf->wnm_sleep_mode)
227 len = 3;
228 if (len < 1 && hapd->iconf->obss_interval)
229 len = 1;
230 if (len < 7 && hapd->conf->ssid.utf8_ssid)
231 len = 7;
232 #ifdef CONFIG_WNM
233 if (len < 4)
234 len = 4;
235 #endif /* CONFIG_WNM */
236 #ifdef CONFIG_HS20
237 if (hapd->conf->hs20 && len < 6)
238 len = 6;
239 #endif /* CONFIG_HS20 */
240 if (len < hapd->iface->extended_capa_len)
241 len = hapd->iface->extended_capa_len;
242 if (len == 0)
243 return eid;
244
245 *pos++ = WLAN_EID_EXT_CAPAB;
246 *pos++ = len;
247 for (i = 0; i < len; i++, pos++) {
248 hostapd_ext_capab_byte(hapd, pos, i);
249
250 if (i < hapd->iface->extended_capa_len) {
251 *pos &= ~hapd->iface->extended_capa_mask[i];
252 *pos |= hapd->iface->extended_capa[i];
253 }
254 }
255
256 while (len > 0 && eid[1 + len] == 0) {
257 len--;
258 eid[1] = len;
259 }
260 if (len == 0)
261 return eid;
262
263 return eid + 2 + len;
264 }
265
266
hostapd_eid_qos_map_set(struct hostapd_data * hapd,u8 * eid)267 u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid)
268 {
269 u8 *pos = eid;
270 u8 len = hapd->conf->qos_map_set_len;
271
272 if (!len)
273 return eid;
274
275 *pos++ = WLAN_EID_QOS_MAP_SET;
276 *pos++ = len;
277 os_memcpy(pos, hapd->conf->qos_map_set, len);
278 pos += len;
279
280 return pos;
281 }
282
283
hostapd_eid_interworking(struct hostapd_data * hapd,u8 * eid)284 u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid)
285 {
286 u8 *pos = eid;
287 #ifdef CONFIG_INTERWORKING
288 u8 *len;
289
290 if (!hapd->conf->interworking)
291 return eid;
292
293 *pos++ = WLAN_EID_INTERWORKING;
294 len = pos++;
295
296 *pos = hapd->conf->access_network_type;
297 if (hapd->conf->internet)
298 *pos |= INTERWORKING_ANO_INTERNET;
299 if (hapd->conf->asra)
300 *pos |= INTERWORKING_ANO_ASRA;
301 if (hapd->conf->esr)
302 *pos |= INTERWORKING_ANO_ESR;
303 if (hapd->conf->uesa)
304 *pos |= INTERWORKING_ANO_UESA;
305 pos++;
306
307 if (hapd->conf->venue_info_set) {
308 *pos++ = hapd->conf->venue_group;
309 *pos++ = hapd->conf->venue_type;
310 }
311
312 if (!is_zero_ether_addr(hapd->conf->hessid)) {
313 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN);
314 pos += ETH_ALEN;
315 }
316
317 *len = pos - len - 1;
318 #endif /* CONFIG_INTERWORKING */
319
320 return pos;
321 }
322
323
hostapd_eid_adv_proto(struct hostapd_data * hapd,u8 * eid)324 u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid)
325 {
326 u8 *pos = eid;
327 #ifdef CONFIG_INTERWORKING
328
329 /* TODO: Separate configuration for ANQP? */
330 if (!hapd->conf->interworking)
331 return eid;
332
333 *pos++ = WLAN_EID_ADV_PROTO;
334 *pos++ = 2;
335 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */
336 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL;
337 #endif /* CONFIG_INTERWORKING */
338
339 return pos;
340 }
341
342
hostapd_eid_roaming_consortium(struct hostapd_data * hapd,u8 * eid)343 u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid)
344 {
345 u8 *pos = eid;
346 #ifdef CONFIG_INTERWORKING
347 u8 *len;
348 unsigned int i, count;
349
350 if (!hapd->conf->interworking ||
351 hapd->conf->roaming_consortium == NULL ||
352 hapd->conf->roaming_consortium_count == 0)
353 return eid;
354
355 *pos++ = WLAN_EID_ROAMING_CONSORTIUM;
356 len = pos++;
357
358 /* Number of ANQP OIs (in addition to the max 3 listed here) */
359 if (hapd->conf->roaming_consortium_count > 3 + 255)
360 *pos++ = 255;
361 else if (hapd->conf->roaming_consortium_count > 3)
362 *pos++ = hapd->conf->roaming_consortium_count - 3;
363 else
364 *pos++ = 0;
365
366 /* OU #1 and #2 Lengths */
367 *pos = hapd->conf->roaming_consortium[0].len;
368 if (hapd->conf->roaming_consortium_count > 1)
369 *pos |= hapd->conf->roaming_consortium[1].len << 4;
370 pos++;
371
372 if (hapd->conf->roaming_consortium_count > 3)
373 count = 3;
374 else
375 count = hapd->conf->roaming_consortium_count;
376
377 for (i = 0; i < count; i++) {
378 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi,
379 hapd->conf->roaming_consortium[i].len);
380 pos += hapd->conf->roaming_consortium[i].len;
381 }
382
383 *len = pos - len - 1;
384 #endif /* CONFIG_INTERWORKING */
385
386 return pos;
387 }
388
389
hostapd_eid_time_adv(struct hostapd_data * hapd,u8 * eid)390 u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid)
391 {
392 if (hapd->conf->time_advertisement != 2)
393 return eid;
394
395 if (hapd->time_adv == NULL &&
396 hostapd_update_time_adv(hapd) < 0)
397 return eid;
398
399 if (hapd->time_adv == NULL)
400 return eid;
401
402 os_memcpy(eid, wpabuf_head(hapd->time_adv),
403 wpabuf_len(hapd->time_adv));
404 eid += wpabuf_len(hapd->time_adv);
405
406 return eid;
407 }
408
409
hostapd_eid_time_zone(struct hostapd_data * hapd,u8 * eid)410 u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid)
411 {
412 size_t len;
413
414 if (hapd->conf->time_advertisement != 2)
415 return eid;
416
417 len = os_strlen(hapd->conf->time_zone);
418
419 *eid++ = WLAN_EID_TIME_ZONE;
420 *eid++ = len;
421 os_memcpy(eid, hapd->conf->time_zone, len);
422 eid += len;
423
424 return eid;
425 }
426
427
hostapd_update_time_adv(struct hostapd_data * hapd)428 int hostapd_update_time_adv(struct hostapd_data *hapd)
429 {
430 const int elen = 2 + 1 + 10 + 5 + 1;
431 struct os_time t;
432 struct os_tm tm;
433 u8 *pos;
434
435 if (hapd->conf->time_advertisement != 2)
436 return 0;
437
438 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0)
439 return -1;
440
441 if (!hapd->time_adv) {
442 hapd->time_adv = wpabuf_alloc(elen);
443 if (hapd->time_adv == NULL)
444 return -1;
445 pos = wpabuf_put(hapd->time_adv, elen);
446 } else
447 pos = wpabuf_mhead_u8(hapd->time_adv);
448
449 *pos++ = WLAN_EID_TIME_ADVERTISEMENT;
450 *pos++ = 1 + 10 + 5 + 1;
451
452 *pos++ = 2; /* UTC time at which the TSF timer is 0 */
453
454 /* Time Value at TSF 0 */
455 /* FIX: need to calculate this based on the current TSF value */
456 WPA_PUT_LE16(pos, tm.year); /* Year */
457 pos += 2;
458 *pos++ = tm.month; /* Month */
459 *pos++ = tm.day; /* Day of month */
460 *pos++ = tm.hour; /* Hours */
461 *pos++ = tm.min; /* Minutes */
462 *pos++ = tm.sec; /* Seconds */
463 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */
464 pos += 2;
465 *pos++ = 0; /* Reserved */
466
467 /* Time Error */
468 /* TODO: fill in an estimate on the error */
469 *pos++ = 0;
470 *pos++ = 0;
471 *pos++ = 0;
472 *pos++ = 0;
473 *pos++ = 0;
474
475 *pos++ = hapd->time_update_counter++;
476
477 return 0;
478 }
479
480
hostapd_eid_bss_max_idle_period(struct hostapd_data * hapd,u8 * eid)481 u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid)
482 {
483 u8 *pos = eid;
484
485 #ifdef CONFIG_WNM
486 if (hapd->conf->ap_max_inactivity > 0) {
487 unsigned int val;
488 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD;
489 *pos++ = 3;
490 val = hapd->conf->ap_max_inactivity;
491 if (val > 68000)
492 val = 68000;
493 val *= 1000;
494 val /= 1024;
495 if (val == 0)
496 val = 1;
497 if (val > 65535)
498 val = 65535;
499 WPA_PUT_LE16(pos, val);
500 pos += 2;
501 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */
502 }
503 #endif /* CONFIG_WNM */
504
505 return pos;
506 }
507