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 if (hapd->conf->proxy_arp)
178 *pos |= 0x10; /* Bit 12 - Proxy ARP */
179 break;
180 case 2: /* Bits 16-23 */
181 if (hapd->conf->wnm_sleep_mode)
182 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */
183 if (hapd->conf->bss_transition)
184 *pos |= 0x08; /* Bit 19 - BSS Transition */
185 break;
186 case 3: /* Bits 24-31 */
187 #ifdef CONFIG_WNM
188 *pos |= 0x02; /* Bit 25 - SSID List */
189 #endif /* CONFIG_WNM */
190 if (hapd->conf->time_advertisement == 2)
191 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */
192 if (hapd->conf->interworking)
193 *pos |= 0x80; /* Bit 31 - Interworking */
194 break;
195 case 4: /* Bits 32-39 */
196 if (hapd->conf->qos_map_set_len)
197 *pos |= 0x01; /* Bit 32 - QoS Map */
198 if (hapd->conf->tdls & TDLS_PROHIBIT)
199 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */
200 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) {
201 /* Bit 39 - TDLS Channel Switching Prohibited */
202 *pos |= 0x80;
203 }
204 break;
205 case 5: /* Bits 40-47 */
206 #ifdef CONFIG_HS20
207 if (hapd->conf->hs20)
208 *pos |= 0x40; /* Bit 46 - WNM-Notification */
209 #endif /* CONFIG_HS20 */
210 break;
211 case 6: /* Bits 48-55 */
212 if (hapd->conf->ssid.utf8_ssid)
213 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */
214 break;
215 }
216 }
217
218
hostapd_eid_ext_capab(struct hostapd_data * hapd,u8 * eid)219 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
220 {
221 u8 *pos = eid;
222 u8 len = 0, i;
223
224 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH))
225 len = 5;
226 if (len < 4 && hapd->conf->interworking)
227 len = 4;
228 if (len < 3 && hapd->conf->wnm_sleep_mode)
229 len = 3;
230 if (len < 1 && hapd->iconf->obss_interval)
231 len = 1;
232 if (len < 7 && hapd->conf->ssid.utf8_ssid)
233 len = 7;
234 #ifdef CONFIG_WNM
235 if (len < 4)
236 len = 4;
237 #endif /* CONFIG_WNM */
238 #ifdef CONFIG_HS20
239 if (hapd->conf->hs20 && len < 6)
240 len = 6;
241 #endif /* CONFIG_HS20 */
242 if (len < hapd->iface->extended_capa_len)
243 len = hapd->iface->extended_capa_len;
244 if (len == 0)
245 return eid;
246
247 *pos++ = WLAN_EID_EXT_CAPAB;
248 *pos++ = len;
249 for (i = 0; i < len; i++, pos++) {
250 hostapd_ext_capab_byte(hapd, pos, i);
251
252 if (i < hapd->iface->extended_capa_len) {
253 *pos &= ~hapd->iface->extended_capa_mask[i];
254 *pos |= hapd->iface->extended_capa[i];
255 }
256 }
257
258 while (len > 0 && eid[1 + len] == 0) {
259 len--;
260 eid[1] = len;
261 }
262 if (len == 0)
263 return eid;
264
265 return eid + 2 + len;
266 }
267
268
hostapd_eid_qos_map_set(struct hostapd_data * hapd,u8 * eid)269 u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid)
270 {
271 u8 *pos = eid;
272 u8 len = hapd->conf->qos_map_set_len;
273
274 if (!len)
275 return eid;
276
277 *pos++ = WLAN_EID_QOS_MAP_SET;
278 *pos++ = len;
279 os_memcpy(pos, hapd->conf->qos_map_set, len);
280 pos += len;
281
282 return pos;
283 }
284
285
hostapd_eid_interworking(struct hostapd_data * hapd,u8 * eid)286 u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid)
287 {
288 u8 *pos = eid;
289 #ifdef CONFIG_INTERWORKING
290 u8 *len;
291
292 if (!hapd->conf->interworking)
293 return eid;
294
295 *pos++ = WLAN_EID_INTERWORKING;
296 len = pos++;
297
298 *pos = hapd->conf->access_network_type;
299 if (hapd->conf->internet)
300 *pos |= INTERWORKING_ANO_INTERNET;
301 if (hapd->conf->asra)
302 *pos |= INTERWORKING_ANO_ASRA;
303 if (hapd->conf->esr)
304 *pos |= INTERWORKING_ANO_ESR;
305 if (hapd->conf->uesa)
306 *pos |= INTERWORKING_ANO_UESA;
307 pos++;
308
309 if (hapd->conf->venue_info_set) {
310 *pos++ = hapd->conf->venue_group;
311 *pos++ = hapd->conf->venue_type;
312 }
313
314 if (!is_zero_ether_addr(hapd->conf->hessid)) {
315 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN);
316 pos += ETH_ALEN;
317 }
318
319 *len = pos - len - 1;
320 #endif /* CONFIG_INTERWORKING */
321
322 return pos;
323 }
324
325
hostapd_eid_adv_proto(struct hostapd_data * hapd,u8 * eid)326 u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid)
327 {
328 u8 *pos = eid;
329 #ifdef CONFIG_INTERWORKING
330
331 /* TODO: Separate configuration for ANQP? */
332 if (!hapd->conf->interworking)
333 return eid;
334
335 *pos++ = WLAN_EID_ADV_PROTO;
336 *pos++ = 2;
337 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */
338 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL;
339 #endif /* CONFIG_INTERWORKING */
340
341 return pos;
342 }
343
344
hostapd_eid_roaming_consortium(struct hostapd_data * hapd,u8 * eid)345 u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid)
346 {
347 u8 *pos = eid;
348 #ifdef CONFIG_INTERWORKING
349 u8 *len;
350 unsigned int i, count;
351
352 if (!hapd->conf->interworking ||
353 hapd->conf->roaming_consortium == NULL ||
354 hapd->conf->roaming_consortium_count == 0)
355 return eid;
356
357 *pos++ = WLAN_EID_ROAMING_CONSORTIUM;
358 len = pos++;
359
360 /* Number of ANQP OIs (in addition to the max 3 listed here) */
361 if (hapd->conf->roaming_consortium_count > 3 + 255)
362 *pos++ = 255;
363 else if (hapd->conf->roaming_consortium_count > 3)
364 *pos++ = hapd->conf->roaming_consortium_count - 3;
365 else
366 *pos++ = 0;
367
368 /* OU #1 and #2 Lengths */
369 *pos = hapd->conf->roaming_consortium[0].len;
370 if (hapd->conf->roaming_consortium_count > 1)
371 *pos |= hapd->conf->roaming_consortium[1].len << 4;
372 pos++;
373
374 if (hapd->conf->roaming_consortium_count > 3)
375 count = 3;
376 else
377 count = hapd->conf->roaming_consortium_count;
378
379 for (i = 0; i < count; i++) {
380 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi,
381 hapd->conf->roaming_consortium[i].len);
382 pos += hapd->conf->roaming_consortium[i].len;
383 }
384
385 *len = pos - len - 1;
386 #endif /* CONFIG_INTERWORKING */
387
388 return pos;
389 }
390
391
hostapd_eid_time_adv(struct hostapd_data * hapd,u8 * eid)392 u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid)
393 {
394 if (hapd->conf->time_advertisement != 2)
395 return eid;
396
397 if (hapd->time_adv == NULL &&
398 hostapd_update_time_adv(hapd) < 0)
399 return eid;
400
401 if (hapd->time_adv == NULL)
402 return eid;
403
404 os_memcpy(eid, wpabuf_head(hapd->time_adv),
405 wpabuf_len(hapd->time_adv));
406 eid += wpabuf_len(hapd->time_adv);
407
408 return eid;
409 }
410
411
hostapd_eid_time_zone(struct hostapd_data * hapd,u8 * eid)412 u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid)
413 {
414 size_t len;
415
416 if (hapd->conf->time_advertisement != 2)
417 return eid;
418
419 len = os_strlen(hapd->conf->time_zone);
420
421 *eid++ = WLAN_EID_TIME_ZONE;
422 *eid++ = len;
423 os_memcpy(eid, hapd->conf->time_zone, len);
424 eid += len;
425
426 return eid;
427 }
428
429
hostapd_update_time_adv(struct hostapd_data * hapd)430 int hostapd_update_time_adv(struct hostapd_data *hapd)
431 {
432 const int elen = 2 + 1 + 10 + 5 + 1;
433 struct os_time t;
434 struct os_tm tm;
435 u8 *pos;
436
437 if (hapd->conf->time_advertisement != 2)
438 return 0;
439
440 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0)
441 return -1;
442
443 if (!hapd->time_adv) {
444 hapd->time_adv = wpabuf_alloc(elen);
445 if (hapd->time_adv == NULL)
446 return -1;
447 pos = wpabuf_put(hapd->time_adv, elen);
448 } else
449 pos = wpabuf_mhead_u8(hapd->time_adv);
450
451 *pos++ = WLAN_EID_TIME_ADVERTISEMENT;
452 *pos++ = 1 + 10 + 5 + 1;
453
454 *pos++ = 2; /* UTC time at which the TSF timer is 0 */
455
456 /* Time Value at TSF 0 */
457 /* FIX: need to calculate this based on the current TSF value */
458 WPA_PUT_LE16(pos, tm.year); /* Year */
459 pos += 2;
460 *pos++ = tm.month; /* Month */
461 *pos++ = tm.day; /* Day of month */
462 *pos++ = tm.hour; /* Hours */
463 *pos++ = tm.min; /* Minutes */
464 *pos++ = tm.sec; /* Seconds */
465 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */
466 pos += 2;
467 *pos++ = 0; /* Reserved */
468
469 /* Time Error */
470 /* TODO: fill in an estimate on the error */
471 *pos++ = 0;
472 *pos++ = 0;
473 *pos++ = 0;
474 *pos++ = 0;
475 *pos++ = 0;
476
477 *pos++ = hapd->time_update_counter++;
478
479 return 0;
480 }
481
482
hostapd_eid_bss_max_idle_period(struct hostapd_data * hapd,u8 * eid)483 u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid)
484 {
485 u8 *pos = eid;
486
487 #ifdef CONFIG_WNM
488 if (hapd->conf->ap_max_inactivity > 0) {
489 unsigned int val;
490 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD;
491 *pos++ = 3;
492 val = hapd->conf->ap_max_inactivity;
493 if (val > 68000)
494 val = 68000;
495 val *= 1000;
496 val /= 1024;
497 if (val == 0)
498 val = 1;
499 if (val > 65535)
500 val = 65535;
501 WPA_PUT_LE16(pos, val);
502 pos += 2;
503 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */
504 }
505 #endif /* CONFIG_WNM */
506
507 return pos;
508 }
509