blob: 0ef307d34c6db450d2765c41437ade07719c1da9 [file] [log] [blame]
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001/*
2 * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
3 * Copyright (c) 2002-2004, Instant802 Networks, Inc.
4 * Copyright (c) 2005-2006, Devicescape Software, Inc.
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08005 * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07006 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Alternatively, this software may be distributed under the terms of BSD
12 * license.
13 *
14 * See README and COPYING for more details.
15 */
16
17#include "utils/includes.h"
18
19#ifndef CONFIG_NATIVE_WINDOWS
20
21#include "utils/common.h"
22#include "common/ieee802_11_defs.h"
23#include "common/ieee802_11_common.h"
24#include "drivers/driver.h"
25#include "wps/wps_defs.h"
26#include "p2p/p2p.h"
27#include "hostapd.h"
28#include "ieee802_11.h"
29#include "wpa_auth.h"
30#include "wmm.h"
31#include "ap_config.h"
32#include "sta_info.h"
33#include "p2p_hostapd.h"
34#include "ap_drv_ops.h"
35#include "beacon.h"
Dmitry Shmidt61d9df32012-08-29 16:22:06 -070036#include "hs20.h"
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -070037
38
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -080039#ifdef NEED_AP_MLME
40
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -070041static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
42{
43 u8 erp = 0;
44
45 if (hapd->iface->current_mode == NULL ||
46 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
47 return 0;
48
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -080049 if (hapd->iface->olbc)
50 erp |= ERP_INFO_USE_PROTECTION;
51 if (hapd->iface->num_sta_non_erp > 0) {
52 erp |= ERP_INFO_NON_ERP_PRESENT |
53 ERP_INFO_USE_PROTECTION;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -070054 }
55 if (hapd->iface->num_sta_no_short_preamble > 0 ||
56 hapd->iconf->preamble == LONG_PREAMBLE)
57 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
58
59 return erp;
60}
61
62
63static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
64{
65 *eid++ = WLAN_EID_DS_PARAMS;
66 *eid++ = 1;
67 *eid++ = hapd->iconf->channel;
68 return eid;
69}
70
71
72static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
73{
74 if (hapd->iface->current_mode == NULL ||
75 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
76 return eid;
77
78 /* Set NonERP_present and use_protection bits if there
79 * are any associated NonERP stations. */
80 /* TODO: use_protection bit can be set to zero even if
81 * there are NonERP stations present. This optimization
82 * might be useful if NonERP stations are "quiet".
83 * See 802.11g/D6 E-1 for recommended practice.
84 * In addition, Non ERP present might be set, if AP detects Non ERP
85 * operation on other APs. */
86
87 /* Add ERP Information element */
88 *eid++ = WLAN_EID_ERP_INFO;
89 *eid++ = 1;
90 *eid++ = ieee802_11_erp_info(hapd);
91
92 return eid;
93}
94
95
96static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
97 struct hostapd_channel_data *start,
98 struct hostapd_channel_data *prev)
99{
100 if (end - pos < 3)
101 return pos;
102
103 /* first channel number */
104 *pos++ = start->chan;
105 /* number of channels */
106 *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
107 /* maximum transmit power level */
108 *pos++ = start->max_tx_power;
109
110 return pos;
111}
112
113
114static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
115 int max_len)
116{
117 u8 *pos = eid;
118 u8 *end = eid + max_len;
119 int i;
120 struct hostapd_hw_modes *mode;
121 struct hostapd_channel_data *start, *prev;
122 int chan_spacing = 1;
123
124 if (!hapd->iconf->ieee80211d || max_len < 6 ||
125 hapd->iface->current_mode == NULL)
126 return eid;
127
128 *pos++ = WLAN_EID_COUNTRY;
129 pos++; /* length will be set later */
130 os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
131 pos += 3;
132
133 mode = hapd->iface->current_mode;
134 if (mode->mode == HOSTAPD_MODE_IEEE80211A)
135 chan_spacing = 4;
136
137 start = prev = NULL;
138 for (i = 0; i < mode->num_channels; i++) {
139 struct hostapd_channel_data *chan = &mode->channels[i];
140 if (chan->flag & HOSTAPD_CHAN_DISABLED)
141 continue;
142 if (start && prev &&
143 prev->chan + chan_spacing == chan->chan &&
144 start->max_tx_power == chan->max_tx_power) {
145 prev = chan;
146 continue; /* can use same entry */
147 }
148
149 if (start) {
150 pos = hostapd_eid_country_add(pos, end, chan_spacing,
151 start, prev);
152 start = NULL;
153 }
154
155 /* Start new group */
156 start = prev = chan;
157 }
158
159 if (start) {
160 pos = hostapd_eid_country_add(pos, end, chan_spacing,
161 start, prev);
162 }
163
164 if ((pos - eid) & 1) {
165 if (end - pos < 1)
166 return eid;
167 *pos++ = 0; /* pad for 16-bit alignment */
168 }
169
170 eid[1] = (pos - eid) - 2;
171
172 return pos;
173}
174
175
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800176static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700177{
178 const u8 *ie;
179 size_t ielen;
180
181 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
182 if (ie == NULL || ielen > len)
183 return eid;
184
185 os_memcpy(eid, ie, ielen);
186 return eid + ielen;
187}
188
189
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800190static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
191 struct sta_info *sta,
192 const struct ieee80211_mgmt *req,
193 int is_p2p, size_t *resp_len)
194{
195 struct ieee80211_mgmt *resp;
196 u8 *pos, *epos;
197 size_t buflen;
198
199#define MAX_PROBERESP_LEN 768
200 buflen = MAX_PROBERESP_LEN;
201#ifdef CONFIG_WPS
202 if (hapd->wps_probe_resp_ie)
203 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
204#endif /* CONFIG_WPS */
205#ifdef CONFIG_P2P
206 if (hapd->p2p_probe_resp_ie)
207 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
208#endif /* CONFIG_P2P */
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700209 if (hapd->conf->vendor_elements)
210 buflen += wpabuf_len(hapd->conf->vendor_elements);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800211 resp = os_zalloc(buflen);
212 if (resp == NULL)
213 return NULL;
214
215 epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
216
217 resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
218 WLAN_FC_STYPE_PROBE_RESP);
219 if (req)
220 os_memcpy(resp->da, req->sa, ETH_ALEN);
221 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
222
223 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
224 resp->u.probe_resp.beacon_int =
225 host_to_le16(hapd->iconf->beacon_int);
226
227 /* hardware or low-level driver will setup seq_ctrl and timestamp */
228 resp->u.probe_resp.capab_info =
229 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
230
231 pos = resp->u.probe_resp.variable;
232 *pos++ = WLAN_EID_SSID;
233 *pos++ = hapd->conf->ssid.ssid_len;
234 os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
235 pos += hapd->conf->ssid.ssid_len;
236
237 /* Supported rates */
238 pos = hostapd_eid_supp_rates(hapd, pos);
239
240 /* DS Params */
241 pos = hostapd_eid_ds_params(hapd, pos);
242
243 pos = hostapd_eid_country(hapd, pos, epos - pos);
244
245 /* ERP Information element */
246 pos = hostapd_eid_erp_info(hapd, pos);
247
248 /* Extended supported rates */
249 pos = hostapd_eid_ext_supp_rates(hapd, pos);
250
251 /* RSN, MDIE, WPA */
252 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
253
254#ifdef CONFIG_IEEE80211N
255 pos = hostapd_eid_ht_capabilities(hapd, pos);
256 pos = hostapd_eid_ht_operation(hapd, pos);
257#endif /* CONFIG_IEEE80211N */
258
259 pos = hostapd_eid_ext_capab(hapd, pos);
260
261 pos = hostapd_eid_time_adv(hapd, pos);
262 pos = hostapd_eid_time_zone(hapd, pos);
263
264 pos = hostapd_eid_interworking(hapd, pos);
265 pos = hostapd_eid_adv_proto(hapd, pos);
266 pos = hostapd_eid_roaming_consortium(hapd, pos);
267
Dmitry Shmidt04949592012-07-19 12:16:46 -0700268#ifdef CONFIG_IEEE80211AC
269 pos = hostapd_eid_vht_capabilities(hapd, pos);
270 pos = hostapd_eid_vht_operation(hapd, pos);
271#endif /* CONFIG_IEEE80211AC */
272
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800273 /* Wi-Fi Alliance WMM */
274 pos = hostapd_eid_wmm(hapd, pos);
275
276#ifdef CONFIG_WPS
277 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
278 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
279 wpabuf_len(hapd->wps_probe_resp_ie));
280 pos += wpabuf_len(hapd->wps_probe_resp_ie);
281 }
282#endif /* CONFIG_WPS */
283
284#ifdef CONFIG_P2P
285 if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
286 hapd->p2p_probe_resp_ie) {
287 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
288 wpabuf_len(hapd->p2p_probe_resp_ie));
289 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
290 }
291#endif /* CONFIG_P2P */
292#ifdef CONFIG_P2P_MANAGER
293 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
294 P2P_MANAGE)
295 pos = hostapd_eid_p2p_manage(hapd, pos);
296#endif /* CONFIG_P2P_MANAGER */
297
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700298#ifdef CONFIG_HS20
299 pos = hostapd_eid_hs20_indication(hapd, pos);
300#endif /* CONFIG_HS20 */
301
302 if (hapd->conf->vendor_elements) {
303 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
304 wpabuf_len(hapd->conf->vendor_elements));
305 pos += wpabuf_len(hapd->conf->vendor_elements);
306 }
307
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800308 *resp_len = pos - (u8 *) resp;
309 return (u8 *) resp;
310}
311
312
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800313enum ssid_match_result {
314 NO_SSID_MATCH,
315 EXACT_SSID_MATCH,
316 WILDCARD_SSID_MATCH
317};
318
319static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
320 const u8 *ssid, size_t ssid_len,
321 const u8 *ssid_list,
322 size_t ssid_list_len)
323{
324 const u8 *pos, *end;
325 int wildcard = 0;
326
327 if (ssid_len == 0)
328 wildcard = 1;
329 if (ssid_len == hapd->conf->ssid.ssid_len &&
330 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
331 return EXACT_SSID_MATCH;
332
333 if (ssid_list == NULL)
334 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
335
336 pos = ssid_list;
337 end = ssid_list + ssid_list_len;
338 while (pos + 1 <= end) {
339 if (pos + 2 + pos[1] > end)
340 break;
341 if (pos[1] == 0)
342 wildcard = 1;
343 if (pos[1] == hapd->conf->ssid.ssid_len &&
344 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
345 return EXACT_SSID_MATCH;
346 pos += 2 + pos[1];
347 }
348
349 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
350}
351
352
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700353void handle_probe_req(struct hostapd_data *hapd,
Dmitry Shmidt04949592012-07-19 12:16:46 -0700354 const struct ieee80211_mgmt *mgmt, size_t len,
355 int ssi_signal)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700356{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800357 u8 *resp;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700358 struct ieee802_11_elems elems;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700359 const u8 *ie;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800360 size_t ie_len;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700361 struct sta_info *sta = NULL;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800362 size_t i, resp_len;
363 int noack;
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800364 enum ssid_match_result res;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700365
366 ie = mgmt->u.probe_req.variable;
367 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
368 return;
369 ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
370
371 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
372 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800373 mgmt->sa, mgmt->da, mgmt->bssid,
Dmitry Shmidt04949592012-07-19 12:16:46 -0700374 ie, ie_len, ssi_signal) > 0)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700375 return;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800376
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700377 if (!hapd->iconf->send_probe_response)
378 return;
379
380 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
381 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
382 MAC2STR(mgmt->sa));
383 return;
384 }
385
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700386 if ((!elems.ssid || !elems.supp_rates)) {
387 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
388 "without SSID or supported rates element",
389 MAC2STR(mgmt->sa));
390 return;
391 }
392
393#ifdef CONFIG_P2P
394 if (hapd->p2p && elems.wps_ie) {
395 struct wpabuf *wps;
396 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
397 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
398 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
399 "due to mismatch with Requested Device "
400 "Type");
401 wpabuf_free(wps);
402 return;
403 }
404 wpabuf_free(wps);
405 }
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800406
407 if (hapd->p2p && elems.p2p) {
408 struct wpabuf *p2p;
409 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
410 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
411 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
412 "due to mismatch with Device ID");
413 wpabuf_free(p2p);
414 return;
415 }
416 wpabuf_free(p2p);
417 }
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700418#endif /* CONFIG_P2P */
419
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800420 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
421 elems.ssid_list_len == 0) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700422 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
423 "broadcast SSID ignored", MAC2STR(mgmt->sa));
424 return;
425 }
426
427 sta = ap_get_sta(hapd, mgmt->sa);
428
429#ifdef CONFIG_P2P
430 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
431 elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
432 os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
433 P2P_WILDCARD_SSID_LEN) == 0) {
434 /* Process P2P Wildcard SSID like Wildcard SSID */
435 elems.ssid_len = 0;
436 }
437#endif /* CONFIG_P2P */
438
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800439 res = ssid_match(hapd, elems.ssid, elems.ssid_len,
440 elems.ssid_list, elems.ssid_list_len);
441 if (res != NO_SSID_MATCH) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700442 if (sta)
443 sta->ssid_probe = &hapd->conf->ssid;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800444 } else {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700445 if (!(mgmt->da[0] & 0x01)) {
446 char ssid_txt[33];
447 ieee802_11_print_ssid(ssid_txt, elems.ssid,
448 elems.ssid_len);
449 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800450 " for foreign SSID '%s' (DA " MACSTR ")%s",
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700451 MAC2STR(mgmt->sa), ssid_txt,
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800452 MAC2STR(mgmt->da),
453 elems.ssid_list ? " (SSID list)" : "");
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700454 }
455 return;
456 }
457
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800458#ifdef CONFIG_INTERWORKING
459 if (elems.interworking && elems.interworking_len >= 1) {
460 u8 ant = elems.interworking[0] & 0x0f;
461 if (ant != INTERWORKING_ANT_WILDCARD &&
462 ant != hapd->conf->access_network_type) {
463 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
464 " for mismatching ANT %u ignored",
465 MAC2STR(mgmt->sa), ant);
466 return;
467 }
468 }
469
470 if (elems.interworking &&
471 (elems.interworking_len == 7 || elems.interworking_len == 9)) {
472 const u8 *hessid;
473 if (elems.interworking_len == 7)
474 hessid = elems.interworking + 1;
475 else
476 hessid = elems.interworking + 1 + 2;
477 if (!is_broadcast_ether_addr(hessid) &&
478 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
479 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
480 " for mismatching HESSID " MACSTR
481 " ignored",
482 MAC2STR(mgmt->sa), MAC2STR(hessid));
483 return;
484 }
485 }
486#endif /* CONFIG_INTERWORKING */
487
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700488 /* TODO: verify that supp_rates contains at least one matching rate
489 * with AP configuration */
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800490
Dmitry Shmidt8da800a2013-04-24 12:57:01 -0700491#ifdef CONFIG_TESTING_OPTIONS
492 if (hapd->iconf->ignore_probe_probability > 0.0d &&
493 drand48() < hapd->iconf->ignore_probe_probability) {
494 wpa_printf(MSG_INFO,
495 "TESTING: ignoring probe request from " MACSTR,
496 MAC2STR(mgmt->sa));
497 return;
498 }
499#endif /* CONFIG_TESTING_OPTIONS */
500
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800501 resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
502 &resp_len);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700503 if (resp == NULL)
504 return;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700505
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800506 /*
507 * If this is a broadcast probe request, apply no ack policy to avoid
508 * excessive retries.
509 */
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -0800510 noack = !!(res == WILDCARD_SSID_MATCH &&
511 is_broadcast_ether_addr(mgmt->da));
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700512
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800513 if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700514 perror("handle_probe_req: send");
515
516 os_free(resp);
517
518 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
519 "SSID", MAC2STR(mgmt->sa),
520 elems.ssid_len == 0 ? "broadcast" : "our");
521}
522
523
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800524static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
525 size_t *resp_len)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700526{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800527 /* check probe response offloading caps and print warnings */
528 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
529 return NULL;
530
531#ifdef CONFIG_WPS
532 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
533 (!(hapd->iface->probe_resp_offloads &
534 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
535 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
536 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
537 "Probe Response while not supporting this");
538#endif /* CONFIG_WPS */
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700539
540#ifdef CONFIG_P2P
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800541 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
542 !(hapd->iface->probe_resp_offloads &
543 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
544 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
545 "Probe Response while not supporting this");
546#endif /* CONFIG_P2P */
547
548 if (hapd->conf->interworking &&
549 !(hapd->iface->probe_resp_offloads &
550 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
551 wpa_printf(MSG_WARNING, "Device is trying to offload "
552 "Interworking Probe Response while not supporting "
553 "this");
554
555 /* Generate a Probe Response template for the non-P2P case */
556 return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
557}
558
559#endif /* NEED_AP_MLME */
560
561
562void ieee802_11_set_beacon(struct hostapd_data *hapd)
563{
564 struct ieee80211_mgmt *head = NULL;
565 u8 *tail = NULL;
566 size_t head_len = 0, tail_len = 0;
567 u8 *resp = NULL;
568 size_t resp_len = 0;
569 struct wpa_driver_ap_params params;
570 struct wpabuf *beacon, *proberesp, *assocresp;
571#ifdef NEED_AP_MLME
572 u16 capab_info;
573 u8 *pos, *tailpos;
574#endif /* NEED_AP_MLME */
575
576 hapd->beacon_set_done = 1;
577
578#ifdef NEED_AP_MLME
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700579
580#define BEACON_HEAD_BUF_SIZE 256
581#define BEACON_TAIL_BUF_SIZE 512
582 head = os_zalloc(BEACON_HEAD_BUF_SIZE);
583 tail_len = BEACON_TAIL_BUF_SIZE;
584#ifdef CONFIG_WPS
585 if (hapd->conf->wps_state && hapd->wps_beacon_ie)
586 tail_len += wpabuf_len(hapd->wps_beacon_ie);
587#endif /* CONFIG_WPS */
588#ifdef CONFIG_P2P
589 if (hapd->p2p_beacon_ie)
590 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
591#endif /* CONFIG_P2P */
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700592 if (hapd->conf->vendor_elements)
593 tail_len += wpabuf_len(hapd->conf->vendor_elements);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700594 tailpos = tail = os_malloc(tail_len);
595 if (head == NULL || tail == NULL) {
596 wpa_printf(MSG_ERROR, "Failed to set beacon data");
597 os_free(head);
598 os_free(tail);
599 return;
600 }
601
602 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
603 WLAN_FC_STYPE_BEACON);
604 head->duration = host_to_le16(0);
605 os_memset(head->da, 0xff, ETH_ALEN);
606
607 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
608 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
609 head->u.beacon.beacon_int =
610 host_to_le16(hapd->iconf->beacon_int);
611
612 /* hardware or low-level driver will setup seq_ctrl and timestamp */
613 capab_info = hostapd_own_capab_info(hapd, NULL, 0);
614 head->u.beacon.capab_info = host_to_le16(capab_info);
615 pos = &head->u.beacon.variable[0];
616
617 /* SSID */
618 *pos++ = WLAN_EID_SSID;
619 if (hapd->conf->ignore_broadcast_ssid == 2) {
620 /* clear the data, but keep the correct length of the SSID */
621 *pos++ = hapd->conf->ssid.ssid_len;
622 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
623 pos += hapd->conf->ssid.ssid_len;
624 } else if (hapd->conf->ignore_broadcast_ssid) {
625 *pos++ = 0; /* empty SSID */
626 } else {
627 *pos++ = hapd->conf->ssid.ssid_len;
628 os_memcpy(pos, hapd->conf->ssid.ssid,
629 hapd->conf->ssid.ssid_len);
630 pos += hapd->conf->ssid.ssid_len;
631 }
632
633 /* Supported rates */
634 pos = hostapd_eid_supp_rates(hapd, pos);
635
636 /* DS Params */
637 pos = hostapd_eid_ds_params(hapd, pos);
638
639 head_len = pos - (u8 *) head;
640
641 tailpos = hostapd_eid_country(hapd, tailpos,
642 tail + BEACON_TAIL_BUF_SIZE - tailpos);
643
644 /* ERP Information element */
645 tailpos = hostapd_eid_erp_info(hapd, tailpos);
646
647 /* Extended supported rates */
648 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
649
650 /* RSN, MDIE, WPA */
651 tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800652 tailpos);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700653
654#ifdef CONFIG_IEEE80211N
655 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
656 tailpos = hostapd_eid_ht_operation(hapd, tailpos);
657#endif /* CONFIG_IEEE80211N */
658
659 tailpos = hostapd_eid_ext_capab(hapd, tailpos);
660
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800661 /*
662 * TODO: Time Advertisement element should only be included in some
663 * DTIM Beacon frames.
664 */
665 tailpos = hostapd_eid_time_adv(hapd, tailpos);
666
667 tailpos = hostapd_eid_interworking(hapd, tailpos);
668 tailpos = hostapd_eid_adv_proto(hapd, tailpos);
669 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
670
Dmitry Shmidt04949592012-07-19 12:16:46 -0700671#ifdef CONFIG_IEEE80211AC
672 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
673 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
674#endif /* CONFIG_IEEE80211AC */
675
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700676 /* Wi-Fi Alliance WMM */
677 tailpos = hostapd_eid_wmm(hapd, tailpos);
678
679#ifdef CONFIG_WPS
680 if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
681 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
682 wpabuf_len(hapd->wps_beacon_ie));
683 tailpos += wpabuf_len(hapd->wps_beacon_ie);
684 }
685#endif /* CONFIG_WPS */
686
687#ifdef CONFIG_P2P
688 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
689 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
690 wpabuf_len(hapd->p2p_beacon_ie));
691 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
692 }
693#endif /* CONFIG_P2P */
694#ifdef CONFIG_P2P_MANAGER
695 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
696 P2P_MANAGE)
697 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
698#endif /* CONFIG_P2P_MANAGER */
699
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700700#ifdef CONFIG_HS20
701 tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
702#endif /* CONFIG_HS20 */
703
704 if (hapd->conf->vendor_elements) {
705 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
706 wpabuf_len(hapd->conf->vendor_elements));
707 tailpos += wpabuf_len(hapd->conf->vendor_elements);
708 }
709
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700710 tail_len = tailpos > tail ? tailpos - tail : 0;
711
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800712 resp = hostapd_probe_resp_offloads(hapd, &resp_len);
713#endif /* NEED_AP_MLME */
714
715 os_memset(&params, 0, sizeof(params));
716 params.head = (u8 *) head;
717 params.head_len = head_len;
718 params.tail = tail;
719 params.tail_len = tail_len;
720 params.proberesp = resp;
721 params.proberesp_len = resp_len;
722 params.dtim_period = hapd->conf->dtim_period;
723 params.beacon_int = hapd->iconf->beacon_int;
Arik Nemtsov2d266062012-09-07 00:22:40 +0300724 params.basic_rates = hapd->iface->basic_rates;
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700725 params.ssid = hapd->conf->ssid.ssid;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800726 params.ssid_len = hapd->conf->ssid.ssid_len;
727 params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
728 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
729 params.group_cipher = hapd->conf->wpa_group;
730 params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
731 params.auth_algs = hapd->conf->auth_algs;
732 params.wpa_version = hapd->conf->wpa;
733 params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
734 (hapd->conf->ieee802_1x &&
735 (hapd->conf->default_wep_key_len ||
736 hapd->conf->individual_wep_key_len));
737 switch (hapd->conf->ignore_broadcast_ssid) {
738 case 0:
739 params.hide_ssid = NO_SSID_HIDING;
740 break;
741 case 1:
742 params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
743 break;
744 case 2:
745 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
746 break;
747 }
748 hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
749 params.beacon_ies = beacon;
750 params.proberesp_ies = proberesp;
751 params.assocresp_ies = assocresp;
752 params.isolate = hapd->conf->isolate;
753#ifdef NEED_AP_MLME
754 params.cts_protect = !!(ieee802_11_erp_info(hapd) &
755 ERP_INFO_USE_PROTECTION);
756 params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
757 hapd->iconf->preamble == SHORT_PREAMBLE;
758 if (hapd->iface->current_mode &&
759 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
760 params.short_slot_time =
761 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
762 else
763 params.short_slot_time = -1;
764 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
765 params.ht_opmode = -1;
766 else
767 params.ht_opmode = hapd->iface->ht_op_mode;
768#endif /* NEED_AP_MLME */
769 params.interworking = hapd->conf->interworking;
770 if (hapd->conf->interworking &&
771 !is_zero_ether_addr(hapd->conf->hessid))
772 params.hessid = hapd->conf->hessid;
773 params.access_network_type = hapd->conf->access_network_type;
Dmitry Shmidt04949592012-07-19 12:16:46 -0700774 params.ap_max_inactivity = hapd->conf->ap_max_inactivity;
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700775#ifdef CONFIG_HS20
776 params.disable_dgaf = hapd->conf->disable_dgaf;
777#endif /* CONFIG_HS20 */
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800778 if (hostapd_drv_set_ap(hapd, &params))
779 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
780 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700781
782 os_free(tail);
783 os_free(head);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800784 os_free(resp);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700785}
786
787
788void ieee802_11_set_beacons(struct hostapd_iface *iface)
789{
790 size_t i;
791 for (i = 0; i < iface->num_bss; i++)
792 ieee802_11_set_beacon(iface->bss[i]);
793}
794
Dmitry Shmidt04949592012-07-19 12:16:46 -0700795
796/* only update beacons if started */
797void ieee802_11_update_beacons(struct hostapd_iface *iface)
798{
799 size_t i;
800 for (i = 0; i < iface->num_bss; i++)
801 if (iface->bss[i]->beacon_set_done)
802 ieee802_11_set_beacon(iface->bss[i]);
803}
804
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700805#endif /* CONFIG_NATIVE_WINDOWS */