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_time now, passed;
28
29 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
30 *pos++ = 5;
31 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
32 os_get_time(&now);
33 os_time_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 perror("ieee802_11_send_sa_query_req: send");
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 perror("ieee80211_mgmt_sa_query_request: send");
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 break;
174 case 1: /* Bits 8-15 */
175 break;
176 case 2: /* Bits 16-23 */
177 if (hapd->conf->wnm_sleep_mode)
178 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */
179 if (hapd->conf->bss_transition)
180 *pos |= 0x08; /* Bit 19 - BSS Transition */
181 break;
182 case 3: /* Bits 24-31 */
183 #ifdef CONFIG_WNM
184 *pos |= 0x02; /* Bit 25 - SSID List */
185 #endif /* CONFIG_WNM */
186 if (hapd->conf->time_advertisement == 2)
187 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */
188 if (hapd->conf->interworking)
189 *pos |= 0x80; /* Bit 31 - Interworking */
190 break;
191 case 4: /* Bits 32-39 */
192 if (hapd->conf->tdls & TDLS_PROHIBIT)
193 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */
194 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) {
195 /* Bit 39 - TDLS Channel Switching Prohibited */
196 *pos |= 0x80;
197 }
198 break;
199 case 5: /* Bits 40-47 */
200 break;
201 case 6: /* Bits 48-55 */
202 if (hapd->conf->ssid.utf8_ssid)
203 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */
204 break;
205 }
206 }
207
208
hostapd_eid_ext_capab(struct hostapd_data * hapd,u8 * eid)209 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
210 {
211 u8 *pos = eid;
212 u8 len = 0, i;
213
214 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH))
215 len = 5;
216 if (len < 4 && hapd->conf->interworking)
217 len = 4;
218 if (len < 3 && hapd->conf->wnm_sleep_mode)
219 len = 3;
220 if (len < 7 && hapd->conf->ssid.utf8_ssid)
221 len = 7;
222 #ifdef CONFIG_WNM
223 if (len < 4)
224 len = 4;
225 #endif /* CONFIG_WNM */
226 if (len < hapd->iface->extended_capa_len)
227 len = hapd->iface->extended_capa_len;
228 if (len == 0)
229 return eid;
230
231 *pos++ = WLAN_EID_EXT_CAPAB;
232 *pos++ = len;
233 for (i = 0; i < len; i++, pos++) {
234 hostapd_ext_capab_byte(hapd, pos, i);
235
236 if (i < hapd->iface->extended_capa_len) {
237 *pos &= ~hapd->iface->extended_capa_mask[i];
238 *pos |= hapd->iface->extended_capa[i];
239 }
240 }
241
242 while (len > 0 && eid[1 + len] == 0) {
243 len--;
244 eid[1] = len;
245 }
246 if (len == 0)
247 return eid;
248
249 return eid + 2 + len;
250 }
251
252
hostapd_eid_interworking(struct hostapd_data * hapd,u8 * eid)253 u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid)
254 {
255 u8 *pos = eid;
256 #ifdef CONFIG_INTERWORKING
257 u8 *len;
258
259 if (!hapd->conf->interworking)
260 return eid;
261
262 *pos++ = WLAN_EID_INTERWORKING;
263 len = pos++;
264
265 *pos = hapd->conf->access_network_type;
266 if (hapd->conf->internet)
267 *pos |= INTERWORKING_ANO_INTERNET;
268 if (hapd->conf->asra)
269 *pos |= INTERWORKING_ANO_ASRA;
270 if (hapd->conf->esr)
271 *pos |= INTERWORKING_ANO_ESR;
272 if (hapd->conf->uesa)
273 *pos |= INTERWORKING_ANO_UESA;
274 pos++;
275
276 if (hapd->conf->venue_info_set) {
277 *pos++ = hapd->conf->venue_group;
278 *pos++ = hapd->conf->venue_type;
279 }
280
281 if (!is_zero_ether_addr(hapd->conf->hessid)) {
282 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN);
283 pos += ETH_ALEN;
284 }
285
286 *len = pos - len - 1;
287 #endif /* CONFIG_INTERWORKING */
288
289 return pos;
290 }
291
292
hostapd_eid_adv_proto(struct hostapd_data * hapd,u8 * eid)293 u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid)
294 {
295 u8 *pos = eid;
296 #ifdef CONFIG_INTERWORKING
297
298 /* TODO: Separate configuration for ANQP? */
299 if (!hapd->conf->interworking)
300 return eid;
301
302 *pos++ = WLAN_EID_ADV_PROTO;
303 *pos++ = 2;
304 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */
305 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL;
306 #endif /* CONFIG_INTERWORKING */
307
308 return pos;
309 }
310
311
hostapd_eid_roaming_consortium(struct hostapd_data * hapd,u8 * eid)312 u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid)
313 {
314 u8 *pos = eid;
315 #ifdef CONFIG_INTERWORKING
316 u8 *len;
317 unsigned int i, count;
318
319 if (!hapd->conf->interworking ||
320 hapd->conf->roaming_consortium == NULL ||
321 hapd->conf->roaming_consortium_count == 0)
322 return eid;
323
324 *pos++ = WLAN_EID_ROAMING_CONSORTIUM;
325 len = pos++;
326
327 /* Number of ANQP OIs (in addition to the max 3 listed here) */
328 if (hapd->conf->roaming_consortium_count > 3 + 255)
329 *pos++ = 255;
330 else if (hapd->conf->roaming_consortium_count > 3)
331 *pos++ = hapd->conf->roaming_consortium_count - 3;
332 else
333 *pos++ = 0;
334
335 /* OU #1 and #2 Lengths */
336 *pos = hapd->conf->roaming_consortium[0].len;
337 if (hapd->conf->roaming_consortium_count > 1)
338 *pos |= hapd->conf->roaming_consortium[1].len << 4;
339 pos++;
340
341 if (hapd->conf->roaming_consortium_count > 3)
342 count = 3;
343 else
344 count = hapd->conf->roaming_consortium_count;
345
346 for (i = 0; i < count; i++) {
347 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi,
348 hapd->conf->roaming_consortium[i].len);
349 pos += hapd->conf->roaming_consortium[i].len;
350 }
351
352 *len = pos - len - 1;
353 #endif /* CONFIG_INTERWORKING */
354
355 return pos;
356 }
357
358
hostapd_eid_time_adv(struct hostapd_data * hapd,u8 * eid)359 u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid)
360 {
361 if (hapd->conf->time_advertisement != 2)
362 return eid;
363
364 if (hapd->time_adv == NULL &&
365 hostapd_update_time_adv(hapd) < 0)
366 return eid;
367
368 if (hapd->time_adv == NULL)
369 return eid;
370
371 os_memcpy(eid, wpabuf_head(hapd->time_adv),
372 wpabuf_len(hapd->time_adv));
373 eid += wpabuf_len(hapd->time_adv);
374
375 return eid;
376 }
377
378
hostapd_eid_time_zone(struct hostapd_data * hapd,u8 * eid)379 u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid)
380 {
381 size_t len;
382
383 if (hapd->conf->time_advertisement != 2)
384 return eid;
385
386 len = os_strlen(hapd->conf->time_zone);
387
388 *eid++ = WLAN_EID_TIME_ZONE;
389 *eid++ = len;
390 os_memcpy(eid, hapd->conf->time_zone, len);
391 eid += len;
392
393 return eid;
394 }
395
396
hostapd_update_time_adv(struct hostapd_data * hapd)397 int hostapd_update_time_adv(struct hostapd_data *hapd)
398 {
399 const int elen = 2 + 1 + 10 + 5 + 1;
400 struct os_time t;
401 struct os_tm tm;
402 u8 *pos;
403
404 if (hapd->conf->time_advertisement != 2)
405 return 0;
406
407 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0)
408 return -1;
409
410 if (!hapd->time_adv) {
411 hapd->time_adv = wpabuf_alloc(elen);
412 if (hapd->time_adv == NULL)
413 return -1;
414 pos = wpabuf_put(hapd->time_adv, elen);
415 } else
416 pos = wpabuf_mhead_u8(hapd->time_adv);
417
418 *pos++ = WLAN_EID_TIME_ADVERTISEMENT;
419 *pos++ = 1 + 10 + 5 + 1;
420
421 *pos++ = 2; /* UTC time at which the TSF timer is 0 */
422
423 /* Time Value at TSF 0 */
424 /* FIX: need to calculate this based on the current TSF value */
425 WPA_PUT_LE16(pos, tm.year); /* Year */
426 pos += 2;
427 *pos++ = tm.month; /* Month */
428 *pos++ = tm.day; /* Day of month */
429 *pos++ = tm.hour; /* Hours */
430 *pos++ = tm.min; /* Minutes */
431 *pos++ = tm.sec; /* Seconds */
432 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */
433 pos += 2;
434 *pos++ = 0; /* Reserved */
435
436 /* Time Error */
437 /* TODO: fill in an estimate on the error */
438 *pos++ = 0;
439 *pos++ = 0;
440 *pos++ = 0;
441 *pos++ = 0;
442 *pos++ = 0;
443
444 *pos++ = hapd->time_update_counter++;
445
446 return 0;
447 }
448
449
hostapd_eid_bss_max_idle_period(struct hostapd_data * hapd,u8 * eid)450 u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid)
451 {
452 u8 *pos = eid;
453
454 #ifdef CONFIG_WNM
455 if (hapd->conf->ap_max_inactivity > 0) {
456 unsigned int val;
457 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD;
458 *pos++ = 3;
459 val = hapd->conf->ap_max_inactivity;
460 if (val > 68000)
461 val = 68000;
462 val *= 1000;
463 val /= 1024;
464 if (val == 0)
465 val = 1;
466 if (val > 65535)
467 val = 65535;
468 WPA_PUT_LE16(pos, val);
469 pos += 2;
470 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */
471 }
472 #endif /* CONFIG_WNM */
473
474 return pos;
475 }
476