gas_serv.c revision 76cd2cc44b62e858f1897ce58f4ce7d0174e8839 
1/*
2 * Generic advertisement service (GAS) server
3 * Copyright (c) 2011-2014, 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 "includes.h"
10
11#include "common.h"
12#include "common/ieee802_11_defs.h"
13#include "common/gas.h"
14#include "utils/eloop.h"
15#include "hostapd.h"
16#include "ap_config.h"
17#include "ap_drv_ops.h"
18#include "sta_info.h"
19#include "gas_serv.h"
20
21
22static void convert_to_protected_dual(struct wpabuf *msg)
23{
24	u8 *categ = wpabuf_mhead_u8(msg);
25	*categ = WLAN_ACTION_PROTECTED_DUAL;
26}
27
28
29static struct gas_dialog_info *
30gas_dialog_create(struct hostapd_data *hapd, const u8 *addr, u8 dialog_token)
31{
32	struct sta_info *sta;
33	struct gas_dialog_info *dia = NULL;
34	int i, j;
35
36	sta = ap_get_sta(hapd, addr);
37	if (!sta) {
38		/*
39		 * We need a STA entry to be able to maintain state for
40		 * the GAS query.
41		 */
42		wpa_printf(MSG_DEBUG, "ANQP: Add a temporary STA entry for "
43			   "GAS query");
44		sta = ap_sta_add(hapd, addr);
45		if (!sta) {
46			wpa_printf(MSG_DEBUG, "Failed to add STA " MACSTR
47				   " for GAS query", MAC2STR(addr));
48			return NULL;
49		}
50		sta->flags |= WLAN_STA_GAS;
51		/*
52		 * The default inactivity is 300 seconds. We don't need
53		 * it to be that long.
54		 */
55		ap_sta_session_timeout(hapd, sta, 5);
56	} else {
57		ap_sta_replenish_timeout(hapd, sta, 5);
58	}
59
60	if (sta->gas_dialog == NULL) {
61		sta->gas_dialog = os_zalloc(GAS_DIALOG_MAX *
62					    sizeof(struct gas_dialog_info));
63		if (sta->gas_dialog == NULL)
64			return NULL;
65	}
66
67	for (i = sta->gas_dialog_next, j = 0; j < GAS_DIALOG_MAX; i++, j++) {
68		if (i == GAS_DIALOG_MAX)
69			i = 0;
70		if (sta->gas_dialog[i].valid)
71			continue;
72		dia = &sta->gas_dialog[i];
73		dia->valid = 1;
74		dia->dialog_token = dialog_token;
75		sta->gas_dialog_next = (++i == GAS_DIALOG_MAX) ? 0 : i;
76		return dia;
77	}
78
79	wpa_msg(hapd->msg_ctx, MSG_ERROR, "ANQP: Could not create dialog for "
80		MACSTR " dialog_token %u. Consider increasing "
81		"GAS_DIALOG_MAX.", MAC2STR(addr), dialog_token);
82
83	return NULL;
84}
85
86
87struct gas_dialog_info *
88gas_serv_dialog_find(struct hostapd_data *hapd, const u8 *addr,
89		     u8 dialog_token)
90{
91	struct sta_info *sta;
92	int i;
93
94	sta = ap_get_sta(hapd, addr);
95	if (!sta) {
96		wpa_printf(MSG_DEBUG, "ANQP: could not find STA " MACSTR,
97			   MAC2STR(addr));
98		return NULL;
99	}
100	for (i = 0; sta->gas_dialog && i < GAS_DIALOG_MAX; i++) {
101		if (sta->gas_dialog[i].dialog_token != dialog_token ||
102		    !sta->gas_dialog[i].valid)
103			continue;
104		return &sta->gas_dialog[i];
105	}
106	wpa_printf(MSG_DEBUG, "ANQP: Could not find dialog for "
107		   MACSTR " dialog_token %u", MAC2STR(addr), dialog_token);
108	return NULL;
109}
110
111
112void gas_serv_dialog_clear(struct gas_dialog_info *dia)
113{
114	wpabuf_free(dia->sd_resp);
115	os_memset(dia, 0, sizeof(*dia));
116}
117
118
119static void gas_serv_free_dialogs(struct hostapd_data *hapd,
120				  const u8 *sta_addr)
121{
122	struct sta_info *sta;
123	int i;
124
125	sta = ap_get_sta(hapd, sta_addr);
126	if (sta == NULL || sta->gas_dialog == NULL)
127		return;
128
129	for (i = 0; i < GAS_DIALOG_MAX; i++) {
130		if (sta->gas_dialog[i].valid)
131			return;
132	}
133
134	os_free(sta->gas_dialog);
135	sta->gas_dialog = NULL;
136}
137
138
139#ifdef CONFIG_HS20
140static void anqp_add_hs_capab_list(struct hostapd_data *hapd,
141				   struct wpabuf *buf)
142{
143	u8 *len;
144
145	len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
146	wpabuf_put_be24(buf, OUI_WFA);
147	wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
148	wpabuf_put_u8(buf, HS20_STYPE_CAPABILITY_LIST);
149	wpabuf_put_u8(buf, 0); /* Reserved */
150	wpabuf_put_u8(buf, HS20_STYPE_CAPABILITY_LIST);
151	if (hapd->conf->hs20_oper_friendly_name)
152		wpabuf_put_u8(buf, HS20_STYPE_OPERATOR_FRIENDLY_NAME);
153	if (hapd->conf->hs20_wan_metrics)
154		wpabuf_put_u8(buf, HS20_STYPE_WAN_METRICS);
155	if (hapd->conf->hs20_connection_capability)
156		wpabuf_put_u8(buf, HS20_STYPE_CONNECTION_CAPABILITY);
157	if (hapd->conf->nai_realm_data)
158		wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
159	if (hapd->conf->hs20_operating_class)
160		wpabuf_put_u8(buf, HS20_STYPE_OPERATING_CLASS);
161	if (hapd->conf->hs20_osu_providers_count)
162		wpabuf_put_u8(buf, HS20_STYPE_OSU_PROVIDERS_LIST);
163	if (hapd->conf->hs20_icons_count)
164		wpabuf_put_u8(buf, HS20_STYPE_ICON_REQUEST);
165	gas_anqp_set_element_len(buf, len);
166}
167#endif /* CONFIG_HS20 */
168
169
170static void anqp_add_capab_list(struct hostapd_data *hapd,
171				struct wpabuf *buf)
172{
173	u8 *len;
174
175	len = gas_anqp_add_element(buf, ANQP_CAPABILITY_LIST);
176	wpabuf_put_le16(buf, ANQP_CAPABILITY_LIST);
177	if (hapd->conf->venue_name)
178		wpabuf_put_le16(buf, ANQP_VENUE_NAME);
179	if (hapd->conf->network_auth_type)
180		wpabuf_put_le16(buf, ANQP_NETWORK_AUTH_TYPE);
181	if (hapd->conf->roaming_consortium)
182		wpabuf_put_le16(buf, ANQP_ROAMING_CONSORTIUM);
183	if (hapd->conf->ipaddr_type_configured)
184		wpabuf_put_le16(buf, ANQP_IP_ADDR_TYPE_AVAILABILITY);
185	if (hapd->conf->nai_realm_data)
186		wpabuf_put_le16(buf, ANQP_NAI_REALM);
187	if (hapd->conf->anqp_3gpp_cell_net)
188		wpabuf_put_le16(buf, ANQP_3GPP_CELLULAR_NETWORK);
189	if (hapd->conf->domain_name)
190		wpabuf_put_le16(buf, ANQP_DOMAIN_NAME);
191#ifdef CONFIG_HS20
192	anqp_add_hs_capab_list(hapd, buf);
193#endif /* CONFIG_HS20 */
194	gas_anqp_set_element_len(buf, len);
195}
196
197
198static void anqp_add_venue_name(struct hostapd_data *hapd, struct wpabuf *buf)
199{
200	if (hapd->conf->venue_name) {
201		u8 *len;
202		unsigned int i;
203		len = gas_anqp_add_element(buf, ANQP_VENUE_NAME);
204		wpabuf_put_u8(buf, hapd->conf->venue_group);
205		wpabuf_put_u8(buf, hapd->conf->venue_type);
206		for (i = 0; i < hapd->conf->venue_name_count; i++) {
207			struct hostapd_lang_string *vn;
208			vn = &hapd->conf->venue_name[i];
209			wpabuf_put_u8(buf, 3 + vn->name_len);
210			wpabuf_put_data(buf, vn->lang, 3);
211			wpabuf_put_data(buf, vn->name, vn->name_len);
212		}
213		gas_anqp_set_element_len(buf, len);
214	}
215}
216
217
218static void anqp_add_network_auth_type(struct hostapd_data *hapd,
219				       struct wpabuf *buf)
220{
221	if (hapd->conf->network_auth_type) {
222		wpabuf_put_le16(buf, ANQP_NETWORK_AUTH_TYPE);
223		wpabuf_put_le16(buf, hapd->conf->network_auth_type_len);
224		wpabuf_put_data(buf, hapd->conf->network_auth_type,
225				hapd->conf->network_auth_type_len);
226	}
227}
228
229
230static void anqp_add_roaming_consortium(struct hostapd_data *hapd,
231					struct wpabuf *buf)
232{
233	unsigned int i;
234	u8 *len;
235
236	len = gas_anqp_add_element(buf, ANQP_ROAMING_CONSORTIUM);
237	for (i = 0; i < hapd->conf->roaming_consortium_count; i++) {
238		struct hostapd_roaming_consortium *rc;
239		rc = &hapd->conf->roaming_consortium[i];
240		wpabuf_put_u8(buf, rc->len);
241		wpabuf_put_data(buf, rc->oi, rc->len);
242	}
243	gas_anqp_set_element_len(buf, len);
244}
245
246
247static void anqp_add_ip_addr_type_availability(struct hostapd_data *hapd,
248					       struct wpabuf *buf)
249{
250	if (hapd->conf->ipaddr_type_configured) {
251		wpabuf_put_le16(buf, ANQP_IP_ADDR_TYPE_AVAILABILITY);
252		wpabuf_put_le16(buf, 1);
253		wpabuf_put_u8(buf, hapd->conf->ipaddr_type_availability);
254	}
255}
256
257
258static void anqp_add_nai_realm_eap(struct wpabuf *buf,
259				   struct hostapd_nai_realm_data *realm)
260{
261	unsigned int i, j;
262
263	wpabuf_put_u8(buf, realm->eap_method_count);
264
265	for (i = 0; i < realm->eap_method_count; i++) {
266		struct hostapd_nai_realm_eap *eap = &realm->eap_method[i];
267		wpabuf_put_u8(buf, 2 + (3 * eap->num_auths));
268		wpabuf_put_u8(buf, eap->eap_method);
269		wpabuf_put_u8(buf, eap->num_auths);
270		for (j = 0; j < eap->num_auths; j++) {
271			wpabuf_put_u8(buf, eap->auth_id[j]);
272			wpabuf_put_u8(buf, 1);
273			wpabuf_put_u8(buf, eap->auth_val[j]);
274		}
275	}
276}
277
278
279static void anqp_add_nai_realm_data(struct wpabuf *buf,
280				    struct hostapd_nai_realm_data *realm,
281				    unsigned int realm_idx)
282{
283	u8 *realm_data_len;
284
285	wpa_printf(MSG_DEBUG, "realm=%s, len=%d", realm->realm[realm_idx],
286		   (int) os_strlen(realm->realm[realm_idx]));
287	realm_data_len = wpabuf_put(buf, 2);
288	wpabuf_put_u8(buf, realm->encoding);
289	wpabuf_put_u8(buf, os_strlen(realm->realm[realm_idx]));
290	wpabuf_put_str(buf, realm->realm[realm_idx]);
291	anqp_add_nai_realm_eap(buf, realm);
292	gas_anqp_set_element_len(buf, realm_data_len);
293}
294
295
296static int hs20_add_nai_home_realm_matches(struct hostapd_data *hapd,
297					   struct wpabuf *buf,
298					   const u8 *home_realm,
299					   size_t home_realm_len)
300{
301	unsigned int i, j, k;
302	u8 num_realms, num_matching = 0, encoding, realm_len, *realm_list_len;
303	struct hostapd_nai_realm_data *realm;
304	const u8 *pos, *realm_name, *end;
305	struct {
306		unsigned int realm_data_idx;
307		unsigned int realm_idx;
308	} matches[10];
309
310	pos = home_realm;
311	end = pos + home_realm_len;
312	if (pos + 1 > end) {
313		wpa_hexdump(MSG_DEBUG, "Too short NAI Home Realm Query",
314			    home_realm, home_realm_len);
315		return -1;
316	}
317	num_realms = *pos++;
318
319	for (i = 0; i < num_realms && num_matching < 10; i++) {
320		if (pos + 2 > end) {
321			wpa_hexdump(MSG_DEBUG,
322				    "Truncated NAI Home Realm Query",
323				    home_realm, home_realm_len);
324			return -1;
325		}
326		encoding = *pos++;
327		realm_len = *pos++;
328		if (pos + realm_len > end) {
329			wpa_hexdump(MSG_DEBUG,
330				    "Truncated NAI Home Realm Query",
331				    home_realm, home_realm_len);
332			return -1;
333		}
334		realm_name = pos;
335		for (j = 0; j < hapd->conf->nai_realm_count &&
336			     num_matching < 10; j++) {
337			const u8 *rpos, *rend;
338			realm = &hapd->conf->nai_realm_data[j];
339			if (encoding != realm->encoding)
340				continue;
341
342			rpos = realm_name;
343			while (rpos < realm_name + realm_len &&
344			       num_matching < 10) {
345				for (rend = rpos;
346				     rend < realm_name + realm_len; rend++) {
347					if (*rend == ';')
348						break;
349				}
350				for (k = 0; k < MAX_NAI_REALMS &&
351					     realm->realm[k] &&
352					     num_matching < 10; k++) {
353					if ((int) os_strlen(realm->realm[k]) !=
354					    rend - rpos ||
355					    os_strncmp((char *) rpos,
356						       realm->realm[k],
357						       rend - rpos) != 0)
358						continue;
359					matches[num_matching].realm_data_idx =
360						j;
361					matches[num_matching].realm_idx = k;
362					num_matching++;
363				}
364				rpos = rend + 1;
365			}
366		}
367		pos += realm_len;
368	}
369
370	realm_list_len = gas_anqp_add_element(buf, ANQP_NAI_REALM);
371	wpabuf_put_le16(buf, num_matching);
372
373	/*
374	 * There are two ways to format. 1. each realm in a NAI Realm Data unit
375	 * 2. all realms that share the same EAP methods in a NAI Realm Data
376	 * unit. The first format is likely to be bigger in size than the
377	 * second, but may be easier to parse and process by the receiver.
378	 */
379	for (i = 0; i < num_matching; i++) {
380		wpa_printf(MSG_DEBUG, "realm_idx %d, realm_data_idx %d",
381			   matches[i].realm_data_idx, matches[i].realm_idx);
382		realm = &hapd->conf->nai_realm_data[matches[i].realm_data_idx];
383		anqp_add_nai_realm_data(buf, realm, matches[i].realm_idx);
384	}
385	gas_anqp_set_element_len(buf, realm_list_len);
386	return 0;
387}
388
389
390static void anqp_add_nai_realm(struct hostapd_data *hapd, struct wpabuf *buf,
391			       const u8 *home_realm, size_t home_realm_len,
392			       int nai_realm, int nai_home_realm)
393{
394	if (nai_realm && hapd->conf->nai_realm_data) {
395		u8 *len;
396		unsigned int i, j;
397		len = gas_anqp_add_element(buf, ANQP_NAI_REALM);
398		wpabuf_put_le16(buf, hapd->conf->nai_realm_count);
399		for (i = 0; i < hapd->conf->nai_realm_count; i++) {
400			u8 *realm_data_len, *realm_len;
401			struct hostapd_nai_realm_data *realm;
402
403			realm = &hapd->conf->nai_realm_data[i];
404			realm_data_len = wpabuf_put(buf, 2);
405			wpabuf_put_u8(buf, realm->encoding);
406			realm_len = wpabuf_put(buf, 1);
407			for (j = 0; realm->realm[j]; j++) {
408				if (j > 0)
409					wpabuf_put_u8(buf, ';');
410				wpabuf_put_str(buf, realm->realm[j]);
411			}
412			*realm_len = (u8 *) wpabuf_put(buf, 0) - realm_len - 1;
413			anqp_add_nai_realm_eap(buf, realm);
414			gas_anqp_set_element_len(buf, realm_data_len);
415		}
416		gas_anqp_set_element_len(buf, len);
417	} else if (nai_home_realm && hapd->conf->nai_realm_data) {
418		hs20_add_nai_home_realm_matches(hapd, buf, home_realm,
419						home_realm_len);
420	}
421}
422
423
424static void anqp_add_3gpp_cellular_network(struct hostapd_data *hapd,
425					   struct wpabuf *buf)
426{
427	if (hapd->conf->anqp_3gpp_cell_net) {
428		wpabuf_put_le16(buf, ANQP_3GPP_CELLULAR_NETWORK);
429		wpabuf_put_le16(buf,
430				hapd->conf->anqp_3gpp_cell_net_len);
431		wpabuf_put_data(buf, hapd->conf->anqp_3gpp_cell_net,
432				hapd->conf->anqp_3gpp_cell_net_len);
433	}
434}
435
436
437static void anqp_add_domain_name(struct hostapd_data *hapd, struct wpabuf *buf)
438{
439	if (hapd->conf->domain_name) {
440		wpabuf_put_le16(buf, ANQP_DOMAIN_NAME);
441		wpabuf_put_le16(buf, hapd->conf->domain_name_len);
442		wpabuf_put_data(buf, hapd->conf->domain_name,
443				hapd->conf->domain_name_len);
444	}
445}
446
447
448#ifdef CONFIG_HS20
449
450static void anqp_add_operator_friendly_name(struct hostapd_data *hapd,
451					    struct wpabuf *buf)
452{
453	if (hapd->conf->hs20_oper_friendly_name) {
454		u8 *len;
455		unsigned int i;
456		len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
457		wpabuf_put_be24(buf, OUI_WFA);
458		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
459		wpabuf_put_u8(buf, HS20_STYPE_OPERATOR_FRIENDLY_NAME);
460		wpabuf_put_u8(buf, 0); /* Reserved */
461		for (i = 0; i < hapd->conf->hs20_oper_friendly_name_count; i++)
462		{
463			struct hostapd_lang_string *vn;
464			vn = &hapd->conf->hs20_oper_friendly_name[i];
465			wpabuf_put_u8(buf, 3 + vn->name_len);
466			wpabuf_put_data(buf, vn->lang, 3);
467			wpabuf_put_data(buf, vn->name, vn->name_len);
468		}
469		gas_anqp_set_element_len(buf, len);
470	}
471}
472
473
474static void anqp_add_wan_metrics(struct hostapd_data *hapd,
475				 struct wpabuf *buf)
476{
477	if (hapd->conf->hs20_wan_metrics) {
478		u8 *len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
479		wpabuf_put_be24(buf, OUI_WFA);
480		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
481		wpabuf_put_u8(buf, HS20_STYPE_WAN_METRICS);
482		wpabuf_put_u8(buf, 0); /* Reserved */
483		wpabuf_put_data(buf, hapd->conf->hs20_wan_metrics, 13);
484		gas_anqp_set_element_len(buf, len);
485	}
486}
487
488
489static void anqp_add_connection_capability(struct hostapd_data *hapd,
490					   struct wpabuf *buf)
491{
492	if (hapd->conf->hs20_connection_capability) {
493		u8 *len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
494		wpabuf_put_be24(buf, OUI_WFA);
495		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
496		wpabuf_put_u8(buf, HS20_STYPE_CONNECTION_CAPABILITY);
497		wpabuf_put_u8(buf, 0); /* Reserved */
498		wpabuf_put_data(buf, hapd->conf->hs20_connection_capability,
499				hapd->conf->hs20_connection_capability_len);
500		gas_anqp_set_element_len(buf, len);
501	}
502}
503
504
505static void anqp_add_operating_class(struct hostapd_data *hapd,
506				     struct wpabuf *buf)
507{
508	if (hapd->conf->hs20_operating_class) {
509		u8 *len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
510		wpabuf_put_be24(buf, OUI_WFA);
511		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
512		wpabuf_put_u8(buf, HS20_STYPE_OPERATING_CLASS);
513		wpabuf_put_u8(buf, 0); /* Reserved */
514		wpabuf_put_data(buf, hapd->conf->hs20_operating_class,
515				hapd->conf->hs20_operating_class_len);
516		gas_anqp_set_element_len(buf, len);
517	}
518}
519
520
521static void anqp_add_osu_provider(struct wpabuf *buf,
522				  struct hostapd_bss_config *bss,
523				  struct hs20_osu_provider *p)
524{
525	u8 *len, *len2, *count;
526	unsigned int i;
527
528	len = wpabuf_put(buf, 2); /* OSU Provider Length to be filled */
529
530	/* OSU Friendly Name Duples */
531	len2 = wpabuf_put(buf, 2);
532	for (i = 0; i < p->friendly_name_count; i++) {
533		struct hostapd_lang_string *s = &p->friendly_name[i];
534		wpabuf_put_u8(buf, 3 + s->name_len);
535		wpabuf_put_data(buf, s->lang, 3);
536		wpabuf_put_data(buf, s->name, s->name_len);
537	}
538	WPA_PUT_LE16(len2, (u8 *) wpabuf_put(buf, 0) - len2 - 2);
539
540	/* OSU Server URI */
541	if (p->server_uri) {
542		wpabuf_put_u8(buf, os_strlen(p->server_uri));
543		wpabuf_put_str(buf, p->server_uri);
544	} else
545		wpabuf_put_u8(buf, 0);
546
547	/* OSU Method List */
548	count = wpabuf_put(buf, 1);
549	for (i = 0; p->method_list[i] >= 0; i++)
550		wpabuf_put_u8(buf, p->method_list[i]);
551	*count = i;
552
553	/* Icons Available */
554	len2 = wpabuf_put(buf, 2);
555	for (i = 0; i < p->icons_count; i++) {
556		size_t j;
557		struct hs20_icon *icon = NULL;
558
559		for (j = 0; j < bss->hs20_icons_count && !icon; j++) {
560			if (os_strcmp(p->icons[i], bss->hs20_icons[j].name) ==
561			    0)
562				icon = &bss->hs20_icons[j];
563		}
564		if (!icon)
565			continue; /* icon info not found */
566
567		wpabuf_put_le16(buf, icon->width);
568		wpabuf_put_le16(buf, icon->height);
569		wpabuf_put_data(buf, icon->language, 3);
570		wpabuf_put_u8(buf, os_strlen(icon->type));
571		wpabuf_put_str(buf, icon->type);
572		wpabuf_put_u8(buf, os_strlen(icon->name));
573		wpabuf_put_str(buf, icon->name);
574	}
575	WPA_PUT_LE16(len2, (u8 *) wpabuf_put(buf, 0) - len2 - 2);
576
577	/* OSU_NAI */
578	if (p->osu_nai) {
579		wpabuf_put_u8(buf, os_strlen(p->osu_nai));
580		wpabuf_put_str(buf, p->osu_nai);
581	} else
582		wpabuf_put_u8(buf, 0);
583
584	/* OSU Service Description Duples */
585	len2 = wpabuf_put(buf, 2);
586	for (i = 0; i < p->service_desc_count; i++) {
587		struct hostapd_lang_string *s = &p->service_desc[i];
588		wpabuf_put_u8(buf, 3 + s->name_len);
589		wpabuf_put_data(buf, s->lang, 3);
590		wpabuf_put_data(buf, s->name, s->name_len);
591	}
592	WPA_PUT_LE16(len2, (u8 *) wpabuf_put(buf, 0) - len2 - 2);
593
594	WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
595}
596
597
598static void anqp_add_osu_providers_list(struct hostapd_data *hapd,
599					struct wpabuf *buf)
600{
601	if (hapd->conf->hs20_osu_providers_count) {
602		size_t i;
603		u8 *len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
604		wpabuf_put_be24(buf, OUI_WFA);
605		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
606		wpabuf_put_u8(buf, HS20_STYPE_OSU_PROVIDERS_LIST);
607		wpabuf_put_u8(buf, 0); /* Reserved */
608
609		/* OSU SSID */
610		wpabuf_put_u8(buf, hapd->conf->osu_ssid_len);
611		wpabuf_put_data(buf, hapd->conf->osu_ssid,
612				hapd->conf->osu_ssid_len);
613
614		/* Number of OSU Providers */
615		wpabuf_put_u8(buf, hapd->conf->hs20_osu_providers_count);
616
617		for (i = 0; i < hapd->conf->hs20_osu_providers_count; i++) {
618			anqp_add_osu_provider(
619				buf, hapd->conf,
620				&hapd->conf->hs20_osu_providers[i]);
621		}
622
623		gas_anqp_set_element_len(buf, len);
624	}
625}
626
627
628static void anqp_add_icon_binary_file(struct hostapd_data *hapd,
629				      struct wpabuf *buf,
630				      const u8 *name, size_t name_len)
631{
632	struct hs20_icon *icon;
633	size_t i;
634	u8 *len;
635
636	wpa_hexdump_ascii(MSG_DEBUG, "HS 2.0: Requested Icon Filename",
637			  name, name_len);
638	for (i = 0; i < hapd->conf->hs20_icons_count; i++) {
639		icon = &hapd->conf->hs20_icons[i];
640		if (name_len == os_strlen(icon->name) &&
641		    os_memcmp(name, icon->name, name_len) == 0)
642			break;
643	}
644
645	if (i < hapd->conf->hs20_icons_count)
646		icon = &hapd->conf->hs20_icons[i];
647	else
648		icon = NULL;
649
650	len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
651	wpabuf_put_be24(buf, OUI_WFA);
652	wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
653	wpabuf_put_u8(buf, HS20_STYPE_ICON_BINARY_FILE);
654	wpabuf_put_u8(buf, 0); /* Reserved */
655
656	if (icon) {
657		char *data;
658		size_t data_len;
659
660		data = os_readfile(icon->file, &data_len);
661		if (data == NULL || data_len > 65535) {
662			wpabuf_put_u8(buf, 2); /* Download Status:
663						* Unspecified file error */
664			wpabuf_put_u8(buf, 0);
665			wpabuf_put_le16(buf, 0);
666		} else {
667			wpabuf_put_u8(buf, 0); /* Download Status: Success */
668			wpabuf_put_u8(buf, os_strlen(icon->type));
669			wpabuf_put_str(buf, icon->type);
670			wpabuf_put_le16(buf, data_len);
671			wpabuf_put_data(buf, data, data_len);
672		}
673		os_free(data);
674	} else {
675		wpabuf_put_u8(buf, 1); /* Download Status: File not found */
676		wpabuf_put_u8(buf, 0);
677		wpabuf_put_le16(buf, 0);
678	}
679
680	gas_anqp_set_element_len(buf, len);
681}
682
683#endif /* CONFIG_HS20 */
684
685
686static struct wpabuf *
687gas_serv_build_gas_resp_payload(struct hostapd_data *hapd,
688				unsigned int request,
689				struct gas_dialog_info *di,
690				const u8 *home_realm, size_t home_realm_len,
691				const u8 *icon_name, size_t icon_name_len)
692{
693	struct wpabuf *buf;
694	size_t len;
695
696	len = 1400;
697	if (request & (ANQP_REQ_NAI_REALM | ANQP_REQ_NAI_HOME_REALM))
698		len += 1000;
699	if (request & ANQP_REQ_ICON_REQUEST)
700		len += 65536;
701
702	buf = wpabuf_alloc(len);
703	if (buf == NULL)
704		return NULL;
705
706	if (request & ANQP_REQ_CAPABILITY_LIST)
707		anqp_add_capab_list(hapd, buf);
708	if (request & ANQP_REQ_VENUE_NAME)
709		anqp_add_venue_name(hapd, buf);
710	if (request & ANQP_REQ_NETWORK_AUTH_TYPE)
711		anqp_add_network_auth_type(hapd, buf);
712	if (request & ANQP_REQ_ROAMING_CONSORTIUM)
713		anqp_add_roaming_consortium(hapd, buf);
714	if (request & ANQP_REQ_IP_ADDR_TYPE_AVAILABILITY)
715		anqp_add_ip_addr_type_availability(hapd, buf);
716	if (request & (ANQP_REQ_NAI_REALM | ANQP_REQ_NAI_HOME_REALM))
717		anqp_add_nai_realm(hapd, buf, home_realm, home_realm_len,
718				   request & ANQP_REQ_NAI_REALM,
719				   request & ANQP_REQ_NAI_HOME_REALM);
720	if (request & ANQP_REQ_3GPP_CELLULAR_NETWORK)
721		anqp_add_3gpp_cellular_network(hapd, buf);
722	if (request & ANQP_REQ_DOMAIN_NAME)
723		anqp_add_domain_name(hapd, buf);
724
725#ifdef CONFIG_HS20
726	if (request & ANQP_REQ_HS_CAPABILITY_LIST)
727		anqp_add_hs_capab_list(hapd, buf);
728	if (request & ANQP_REQ_OPERATOR_FRIENDLY_NAME)
729		anqp_add_operator_friendly_name(hapd, buf);
730	if (request & ANQP_REQ_WAN_METRICS)
731		anqp_add_wan_metrics(hapd, buf);
732	if (request & ANQP_REQ_CONNECTION_CAPABILITY)
733		anqp_add_connection_capability(hapd, buf);
734	if (request & ANQP_REQ_OPERATING_CLASS)
735		anqp_add_operating_class(hapd, buf);
736	if (request & ANQP_REQ_OSU_PROVIDERS_LIST)
737		anqp_add_osu_providers_list(hapd, buf);
738	if (request & ANQP_REQ_ICON_REQUEST)
739		anqp_add_icon_binary_file(hapd, buf, icon_name, icon_name_len);
740#endif /* CONFIG_HS20 */
741
742	return buf;
743}
744
745
746struct anqp_query_info {
747	unsigned int request;
748	const u8 *home_realm_query;
749	size_t home_realm_query_len;
750	const u8 *icon_name;
751	size_t icon_name_len;
752};
753
754
755static void set_anqp_req(unsigned int bit, const char *name, int local,
756			 struct anqp_query_info *qi)
757{
758	qi->request |= bit;
759	if (local) {
760		wpa_printf(MSG_DEBUG, "ANQP: %s (local)", name);
761	} else {
762		wpa_printf(MSG_DEBUG, "ANQP: %s not available", name);
763	}
764}
765
766
767static void rx_anqp_query_list_id(struct hostapd_data *hapd, u16 info_id,
768				  struct anqp_query_info *qi)
769{
770	switch (info_id) {
771	case ANQP_CAPABILITY_LIST:
772		set_anqp_req(ANQP_REQ_CAPABILITY_LIST, "Capability List", 1,
773			     qi);
774		break;
775	case ANQP_VENUE_NAME:
776		set_anqp_req(ANQP_REQ_VENUE_NAME, "Venue Name",
777			     hapd->conf->venue_name != NULL, qi);
778		break;
779	case ANQP_NETWORK_AUTH_TYPE:
780		set_anqp_req(ANQP_REQ_NETWORK_AUTH_TYPE, "Network Auth Type",
781			     hapd->conf->network_auth_type != NULL, qi);
782		break;
783	case ANQP_ROAMING_CONSORTIUM:
784		set_anqp_req(ANQP_REQ_ROAMING_CONSORTIUM, "Roaming Consortium",
785			     hapd->conf->roaming_consortium != NULL, qi);
786		break;
787	case ANQP_IP_ADDR_TYPE_AVAILABILITY:
788		set_anqp_req(ANQP_REQ_IP_ADDR_TYPE_AVAILABILITY,
789			     "IP Addr Type Availability",
790			     hapd->conf->ipaddr_type_configured, qi);
791		break;
792	case ANQP_NAI_REALM:
793		set_anqp_req(ANQP_REQ_NAI_REALM, "NAI Realm",
794			     hapd->conf->nai_realm_data != NULL, qi);
795		break;
796	case ANQP_3GPP_CELLULAR_NETWORK:
797		set_anqp_req(ANQP_REQ_3GPP_CELLULAR_NETWORK,
798			     "3GPP Cellular Network",
799			     hapd->conf->anqp_3gpp_cell_net != NULL, qi);
800		break;
801	case ANQP_DOMAIN_NAME:
802		set_anqp_req(ANQP_REQ_DOMAIN_NAME, "Domain Name",
803			     hapd->conf->domain_name != NULL, qi);
804		break;
805	default:
806		wpa_printf(MSG_DEBUG, "ANQP: Unsupported Info Id %u",
807			   info_id);
808		break;
809	}
810}
811
812
813static void rx_anqp_query_list(struct hostapd_data *hapd,
814			       const u8 *pos, const u8 *end,
815			       struct anqp_query_info *qi)
816{
817	wpa_printf(MSG_DEBUG, "ANQP: %u Info IDs requested in Query list",
818		   (unsigned int) (end - pos) / 2);
819
820	while (pos + 2 <= end) {
821		rx_anqp_query_list_id(hapd, WPA_GET_LE16(pos), qi);
822		pos += 2;
823	}
824}
825
826
827#ifdef CONFIG_HS20
828
829static void rx_anqp_hs_query_list(struct hostapd_data *hapd, u8 subtype,
830				  struct anqp_query_info *qi)
831{
832	switch (subtype) {
833	case HS20_STYPE_CAPABILITY_LIST:
834		set_anqp_req(ANQP_REQ_HS_CAPABILITY_LIST, "HS Capability List",
835			     1, qi);
836		break;
837	case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
838		set_anqp_req(ANQP_REQ_OPERATOR_FRIENDLY_NAME,
839			     "Operator Friendly Name",
840			     hapd->conf->hs20_oper_friendly_name != NULL, qi);
841		break;
842	case HS20_STYPE_WAN_METRICS:
843		set_anqp_req(ANQP_REQ_WAN_METRICS, "WAN Metrics",
844			     hapd->conf->hs20_wan_metrics != NULL, qi);
845		break;
846	case HS20_STYPE_CONNECTION_CAPABILITY:
847		set_anqp_req(ANQP_REQ_CONNECTION_CAPABILITY,
848			     "Connection Capability",
849			     hapd->conf->hs20_connection_capability != NULL,
850			     qi);
851		break;
852	case HS20_STYPE_OPERATING_CLASS:
853		set_anqp_req(ANQP_REQ_OPERATING_CLASS, "Operating Class",
854			     hapd->conf->hs20_operating_class != NULL, qi);
855		break;
856	case HS20_STYPE_OSU_PROVIDERS_LIST:
857		set_anqp_req(ANQP_REQ_OSU_PROVIDERS_LIST, "OSU Providers list",
858			     hapd->conf->hs20_osu_providers_count, qi);
859		break;
860	default:
861		wpa_printf(MSG_DEBUG, "ANQP: Unsupported HS 2.0 subtype %u",
862			   subtype);
863		break;
864	}
865}
866
867
868static void rx_anqp_hs_nai_home_realm(struct hostapd_data *hapd,
869				      const u8 *pos, const u8 *end,
870				      struct anqp_query_info *qi)
871{
872	qi->request |= ANQP_REQ_NAI_HOME_REALM;
873	qi->home_realm_query = pos;
874	qi->home_realm_query_len = end - pos;
875	if (hapd->conf->nai_realm_data != NULL) {
876		wpa_printf(MSG_DEBUG, "ANQP: HS 2.0 NAI Home Realm Query "
877			   "(local)");
878	} else {
879		wpa_printf(MSG_DEBUG, "ANQP: HS 2.0 NAI Home Realm Query not "
880			   "available");
881	}
882}
883
884
885static void rx_anqp_hs_icon_request(struct hostapd_data *hapd,
886				    const u8 *pos, const u8 *end,
887				    struct anqp_query_info *qi)
888{
889	qi->request |= ANQP_REQ_ICON_REQUEST;
890	qi->icon_name = pos;
891	qi->icon_name_len = end - pos;
892	if (hapd->conf->hs20_icons_count) {
893		wpa_printf(MSG_DEBUG, "ANQP: HS 2.0 Icon Request Query "
894			   "(local)");
895	} else {
896		wpa_printf(MSG_DEBUG, "ANQP: HS 2.0 Icon Request Query not "
897			   "available");
898	}
899}
900
901
902static void rx_anqp_vendor_specific(struct hostapd_data *hapd,
903				    const u8 *pos, const u8 *end,
904				    struct anqp_query_info *qi)
905{
906	u32 oui;
907	u8 subtype;
908
909	if (pos + 4 > end) {
910		wpa_printf(MSG_DEBUG, "ANQP: Too short vendor specific ANQP "
911			   "Query element");
912		return;
913	}
914
915	oui = WPA_GET_BE24(pos);
916	pos += 3;
917	if (oui != OUI_WFA) {
918		wpa_printf(MSG_DEBUG, "ANQP: Unsupported vendor OUI %06x",
919			   oui);
920		return;
921	}
922
923	if (*pos != HS20_ANQP_OUI_TYPE) {
924		wpa_printf(MSG_DEBUG, "ANQP: Unsupported WFA vendor type %u",
925			   *pos);
926		return;
927	}
928	pos++;
929
930	if (pos + 1 >= end)
931		return;
932
933	subtype = *pos++;
934	pos++; /* Reserved */
935	switch (subtype) {
936	case HS20_STYPE_QUERY_LIST:
937		wpa_printf(MSG_DEBUG, "ANQP: HS 2.0 Query List");
938		while (pos < end) {
939			rx_anqp_hs_query_list(hapd, *pos, qi);
940			pos++;
941		}
942		break;
943	case HS20_STYPE_NAI_HOME_REALM_QUERY:
944		rx_anqp_hs_nai_home_realm(hapd, pos, end, qi);
945		break;
946	case HS20_STYPE_ICON_REQUEST:
947		rx_anqp_hs_icon_request(hapd, pos, end, qi);
948		break;
949	default:
950		wpa_printf(MSG_DEBUG, "ANQP: Unsupported HS 2.0 query subtype "
951			   "%u", subtype);
952		break;
953	}
954}
955
956#endif /* CONFIG_HS20 */
957
958
959static void gas_serv_req_local_processing(struct hostapd_data *hapd,
960					  const u8 *sa, u8 dialog_token,
961					  struct anqp_query_info *qi, int prot)
962{
963	struct wpabuf *buf, *tx_buf;
964
965	buf = gas_serv_build_gas_resp_payload(hapd, qi->request, NULL,
966					      qi->home_realm_query,
967					      qi->home_realm_query_len,
968					      qi->icon_name, qi->icon_name_len);
969	wpa_hexdump_buf(MSG_MSGDUMP, "ANQP: Locally generated ANQP responses",
970			buf);
971	if (!buf)
972		return;
973
974	if (wpabuf_len(buf) > hapd->gas_frag_limit ||
975	    hapd->conf->gas_comeback_delay) {
976		struct gas_dialog_info *di;
977		u16 comeback_delay = 1;
978
979		if (hapd->conf->gas_comeback_delay) {
980			/* Testing - allow overriding of the delay value */
981			comeback_delay = hapd->conf->gas_comeback_delay;
982		}
983
984		wpa_printf(MSG_DEBUG, "ANQP: Too long response to fit in "
985			   "initial response - use GAS comeback");
986		di = gas_dialog_create(hapd, sa, dialog_token);
987		if (!di) {
988			wpa_printf(MSG_INFO, "ANQP: Could not create dialog "
989				   "for " MACSTR " (dialog token %u)",
990				   MAC2STR(sa), dialog_token);
991			wpabuf_free(buf);
992			tx_buf = gas_anqp_build_initial_resp_buf(
993				dialog_token, WLAN_STATUS_UNSPECIFIED_FAILURE,
994				0, NULL);
995		} else {
996			di->prot = prot;
997			di->sd_resp = buf;
998			di->sd_resp_pos = 0;
999			tx_buf = gas_anqp_build_initial_resp_buf(
1000				dialog_token, WLAN_STATUS_SUCCESS,
1001				comeback_delay, NULL);
1002		}
1003	} else {
1004		wpa_printf(MSG_DEBUG, "ANQP: Initial response (no comeback)");
1005		tx_buf = gas_anqp_build_initial_resp_buf(
1006			dialog_token, WLAN_STATUS_SUCCESS, 0, buf);
1007		wpabuf_free(buf);
1008	}
1009	if (!tx_buf)
1010		return;
1011	if (prot)
1012		convert_to_protected_dual(tx_buf);
1013	hostapd_drv_send_action(hapd, hapd->iface->freq, 0, sa,
1014				wpabuf_head(tx_buf), wpabuf_len(tx_buf));
1015	wpabuf_free(tx_buf);
1016}
1017
1018
1019static void gas_serv_rx_gas_initial_req(struct hostapd_data *hapd,
1020					const u8 *sa,
1021					const u8 *data, size_t len, int prot)
1022{
1023	const u8 *pos = data;
1024	const u8 *end = data + len;
1025	const u8 *next;
1026	u8 dialog_token;
1027	u16 slen;
1028	struct anqp_query_info qi;
1029	const u8 *adv_proto;
1030
1031	if (len < 1 + 2)
1032		return;
1033
1034	os_memset(&qi, 0, sizeof(qi));
1035
1036	dialog_token = *pos++;
1037	wpa_msg(hapd->msg_ctx, MSG_DEBUG,
1038		"GAS: GAS Initial Request from " MACSTR " (dialog token %u) ",
1039		MAC2STR(sa), dialog_token);
1040
1041	if (*pos != WLAN_EID_ADV_PROTO) {
1042		wpa_msg(hapd->msg_ctx, MSG_DEBUG,
1043			"GAS: Unexpected IE in GAS Initial Request: %u", *pos);
1044		return;
1045	}
1046	adv_proto = pos++;
1047
1048	slen = *pos++;
1049	next = pos + slen;
1050	if (next > end || slen < 2) {
1051		wpa_msg(hapd->msg_ctx, MSG_DEBUG,
1052			"GAS: Invalid IE in GAS Initial Request");
1053		return;
1054	}
1055	pos++; /* skip QueryRespLenLimit and PAME-BI */
1056
1057	if (*pos != ACCESS_NETWORK_QUERY_PROTOCOL) {
1058		struct wpabuf *buf;
1059		wpa_msg(hapd->msg_ctx, MSG_DEBUG,
1060			"GAS: Unsupported GAS advertisement protocol id %u",
1061			*pos);
1062		if (sa[0] & 0x01)
1063			return; /* Invalid source address - drop silently */
1064		buf = gas_build_initial_resp(
1065			dialog_token, WLAN_STATUS_GAS_ADV_PROTO_NOT_SUPPORTED,
1066			0, 2 + slen + 2);
1067		if (buf == NULL)
1068			return;
1069		wpabuf_put_data(buf, adv_proto, 2 + slen);
1070		wpabuf_put_le16(buf, 0); /* Query Response Length */
1071		if (prot)
1072			convert_to_protected_dual(buf);
1073		hostapd_drv_send_action(hapd, hapd->iface->freq, 0, sa,
1074					wpabuf_head(buf), wpabuf_len(buf));
1075		wpabuf_free(buf);
1076		return;
1077	}
1078
1079	pos = next;
1080	/* Query Request */
1081	if (pos + 2 > end)
1082		return;
1083	slen = WPA_GET_LE16(pos);
1084	pos += 2;
1085	if (pos + slen > end)
1086		return;
1087	end = pos + slen;
1088
1089	/* ANQP Query Request */
1090	while (pos < end) {
1091		u16 info_id, elen;
1092
1093		if (pos + 4 > end)
1094			return;
1095
1096		info_id = WPA_GET_LE16(pos);
1097		pos += 2;
1098		elen = WPA_GET_LE16(pos);
1099		pos += 2;
1100
1101		if (pos + elen > end) {
1102			wpa_printf(MSG_DEBUG, "ANQP: Invalid Query Request");
1103			return;
1104		}
1105
1106		switch (info_id) {
1107		case ANQP_QUERY_LIST:
1108			rx_anqp_query_list(hapd, pos, pos + elen, &qi);
1109			break;
1110#ifdef CONFIG_HS20
1111		case ANQP_VENDOR_SPECIFIC:
1112			rx_anqp_vendor_specific(hapd, pos, pos + elen, &qi);
1113			break;
1114#endif /* CONFIG_HS20 */
1115		default:
1116			wpa_printf(MSG_DEBUG, "ANQP: Unsupported Query "
1117				   "Request element %u", info_id);
1118			break;
1119		}
1120
1121		pos += elen;
1122	}
1123
1124	gas_serv_req_local_processing(hapd, sa, dialog_token, &qi, prot);
1125}
1126
1127
1128static void gas_serv_rx_gas_comeback_req(struct hostapd_data *hapd,
1129					 const u8 *sa,
1130					 const u8 *data, size_t len, int prot)
1131{
1132	struct gas_dialog_info *dialog;
1133	struct wpabuf *buf, *tx_buf;
1134	u8 dialog_token;
1135	size_t frag_len;
1136	int more = 0;
1137
1138	wpa_hexdump(MSG_DEBUG, "GAS: RX GAS Comeback Request", data, len);
1139	if (len < 1)
1140		return;
1141	dialog_token = *data;
1142	wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: Dialog Token: %u",
1143		dialog_token);
1144
1145	dialog = gas_serv_dialog_find(hapd, sa, dialog_token);
1146	if (!dialog) {
1147		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: No pending SD "
1148			"response fragment for " MACSTR " dialog token %u",
1149			MAC2STR(sa), dialog_token);
1150
1151		if (sa[0] & 0x01)
1152			return; /* Invalid source address - drop silently */
1153		tx_buf = gas_anqp_build_comeback_resp_buf(
1154			dialog_token, WLAN_STATUS_NO_OUTSTANDING_GAS_REQ, 0, 0,
1155			0, NULL);
1156		if (tx_buf == NULL)
1157			return;
1158		goto send_resp;
1159	}
1160
1161	frag_len = wpabuf_len(dialog->sd_resp) - dialog->sd_resp_pos;
1162	if (frag_len > hapd->gas_frag_limit) {
1163		frag_len = hapd->gas_frag_limit;
1164		more = 1;
1165	}
1166	wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: resp frag_len %u",
1167		(unsigned int) frag_len);
1168	buf = wpabuf_alloc_copy(wpabuf_head_u8(dialog->sd_resp) +
1169				dialog->sd_resp_pos, frag_len);
1170	if (buf == NULL) {
1171		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: Failed to allocate "
1172			"buffer");
1173		gas_serv_dialog_clear(dialog);
1174		return;
1175	}
1176	tx_buf = gas_anqp_build_comeback_resp_buf(dialog_token,
1177						  WLAN_STATUS_SUCCESS,
1178						  dialog->sd_frag_id,
1179						  more, 0, buf);
1180	wpabuf_free(buf);
1181	if (tx_buf == NULL) {
1182		gas_serv_dialog_clear(dialog);
1183		return;
1184	}
1185	wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: Tx GAS Comeback Response "
1186		"(frag_id %d more=%d frag_len=%d)",
1187		dialog->sd_frag_id, more, (int) frag_len);
1188	dialog->sd_frag_id++;
1189	dialog->sd_resp_pos += frag_len;
1190
1191	if (more) {
1192		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: %d more bytes remain "
1193			"to be sent",
1194			(int) (wpabuf_len(dialog->sd_resp) -
1195			       dialog->sd_resp_pos));
1196	} else {
1197		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "GAS: All fragments of "
1198			"SD response sent");
1199		gas_serv_dialog_clear(dialog);
1200		gas_serv_free_dialogs(hapd, sa);
1201	}
1202
1203send_resp:
1204	if (prot)
1205		convert_to_protected_dual(tx_buf);
1206	hostapd_drv_send_action(hapd, hapd->iface->freq, 0, sa,
1207				wpabuf_head(tx_buf), wpabuf_len(tx_buf));
1208	wpabuf_free(tx_buf);
1209}
1210
1211
1212static void gas_serv_rx_public_action(void *ctx, const u8 *buf, size_t len,
1213				      int freq)
1214{
1215	struct hostapd_data *hapd = ctx;
1216	const struct ieee80211_mgmt *mgmt;
1217	size_t hdr_len;
1218	const u8 *sa, *data;
1219	int prot;
1220
1221	mgmt = (const struct ieee80211_mgmt *) buf;
1222	hdr_len = (const u8 *) &mgmt->u.action.u.vs_public_action.action - buf;
1223	if (hdr_len > len)
1224		return;
1225	if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
1226	    mgmt->u.action.category != WLAN_ACTION_PROTECTED_DUAL)
1227		return;
1228	/*
1229	 * Note: Public Action and Protected Dual of Public Action frames share
1230	 * the same payload structure, so it is fine to use definitions of
1231	 * Public Action frames to process both.
1232	 */
1233	prot = mgmt->u.action.category == WLAN_ACTION_PROTECTED_DUAL;
1234	sa = mgmt->sa;
1235	len -= hdr_len;
1236	data = &mgmt->u.action.u.public_action.action;
1237	switch (data[0]) {
1238	case WLAN_PA_GAS_INITIAL_REQ:
1239		gas_serv_rx_gas_initial_req(hapd, sa, data + 1, len - 1, prot);
1240		break;
1241	case WLAN_PA_GAS_COMEBACK_REQ:
1242		gas_serv_rx_gas_comeback_req(hapd, sa, data + 1, len - 1, prot);
1243		break;
1244	}
1245}
1246
1247
1248int gas_serv_init(struct hostapd_data *hapd)
1249{
1250	hapd->public_action_cb2 = gas_serv_rx_public_action;
1251	hapd->public_action_cb2_ctx = hapd;
1252	hapd->gas_frag_limit = 1400;
1253	if (hapd->conf->gas_frag_limit > 0)
1254		hapd->gas_frag_limit = hapd->conf->gas_frag_limit;
1255	return 0;
1256}
1257
1258
1259void gas_serv_deinit(struct hostapd_data *hapd)
1260{
1261}
1262