1 /*
2  * Wi-Fi Protected Setup - External Registrar
3  * Copyright (c) 2009-2013, 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 "includes.h"
10 
11 #include "common.h"
12 #include "base64.h"
13 #include "uuid.h"
14 #include "eloop.h"
15 #include "httpread.h"
16 #include "http_client.h"
17 #include "http_server.h"
18 #include "upnp_xml.h"
19 #include "wps_i.h"
20 #include "wps_upnp.h"
21 #include "wps_upnp_i.h"
22 #include "wps_er.h"
23 
24 
25 static void wps_er_deinit_finish(void *eloop_data, void *user_ctx);
26 static void wps_er_ap_timeout(void *eloop_data, void *user_ctx);
27 static void wps_er_sta_timeout(void *eloop_data, void *user_ctx);
28 static void wps_er_ap_process(struct wps_er_ap *ap, struct wpabuf *msg);
29 static int wps_er_send_get_device_info(struct wps_er_ap *ap,
30 				       void (*m1_handler)(struct wps_er_ap *ap,
31 							  struct wpabuf *m1));
32 
33 
wps_er_sta_event(struct wps_context * wps,struct wps_er_sta * sta,enum wps_event event)34 static void wps_er_sta_event(struct wps_context *wps, struct wps_er_sta *sta,
35 			     enum wps_event event)
36 {
37 	union wps_event_data data;
38 	struct wps_event_er_enrollee *ev = &data.enrollee;
39 
40 	if (wps->event_cb == NULL)
41 		return;
42 
43 	os_memset(&data, 0, sizeof(data));
44 	ev->uuid = sta->uuid;
45 	ev->mac_addr = sta->addr;
46 	ev->m1_received = sta->m1_received;
47 	ev->config_methods = sta->config_methods;
48 	ev->dev_passwd_id = sta->dev_passwd_id;
49 	ev->pri_dev_type = sta->pri_dev_type;
50 	ev->dev_name = sta->dev_name;
51 	ev->manufacturer = sta->manufacturer;
52 	ev->model_name = sta->model_name;
53 	ev->model_number = sta->model_number;
54 	ev->serial_number = sta->serial_number;
55 	wps->event_cb(wps->cb_ctx, event, &data);
56 }
57 
58 
wps_er_sta_get(struct wps_er_ap * ap,const u8 * addr,const u8 * uuid)59 static struct wps_er_sta * wps_er_sta_get(struct wps_er_ap *ap, const u8 *addr,
60 					  const u8 *uuid)
61 {
62 	struct wps_er_sta *sta;
63 	dl_list_for_each(sta, &ap->sta, struct wps_er_sta, list) {
64 		if ((addr == NULL ||
65 		     os_memcmp(sta->addr, addr, ETH_ALEN) == 0) &&
66 		    (uuid == NULL ||
67 		     os_memcmp(uuid, sta->uuid, WPS_UUID_LEN) == 0))
68 			return sta;
69 	}
70 	return NULL;
71 }
72 
73 
wps_er_sta_free(struct wps_er_sta * sta)74 static void wps_er_sta_free(struct wps_er_sta *sta)
75 {
76 	wps_er_sta_event(sta->ap->er->wps, sta, WPS_EV_ER_ENROLLEE_REMOVE);
77 	if (sta->wps)
78 		wps_deinit(sta->wps);
79 	os_free(sta->manufacturer);
80 	os_free(sta->model_name);
81 	os_free(sta->model_number);
82 	os_free(sta->serial_number);
83 	os_free(sta->dev_name);
84 	http_client_free(sta->http);
85 	eloop_cancel_timeout(wps_er_sta_timeout, sta, NULL);
86 	os_free(sta->cred);
87 	os_free(sta);
88 }
89 
90 
wps_er_sta_remove_all(struct wps_er_ap * ap)91 static void wps_er_sta_remove_all(struct wps_er_ap *ap)
92 {
93 	struct wps_er_sta *prev, *sta;
94 	dl_list_for_each_safe(sta, prev, &ap->sta, struct wps_er_sta, list)
95 		wps_er_sta_free(sta);
96 }
97 
98 
wps_er_ap_get(struct wps_er * er,struct in_addr * addr,const u8 * uuid,const u8 * mac_addr)99 static struct wps_er_ap * wps_er_ap_get(struct wps_er *er,
100 					struct in_addr *addr, const u8 *uuid,
101 					const u8 *mac_addr)
102 {
103 	struct wps_er_ap *ap;
104 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
105 		if ((addr == NULL || ap->addr.s_addr == addr->s_addr) &&
106 		    (uuid == NULL ||
107 		     os_memcmp(uuid, ap->uuid, WPS_UUID_LEN) == 0) &&
108 		    (mac_addr == NULL ||
109 		     os_memcmp(mac_addr, ap->mac_addr, ETH_ALEN) == 0))
110 			return ap;
111 	}
112 	return NULL;
113 }
114 
115 
wps_er_ap_get_id(struct wps_er * er,unsigned int id)116 static struct wps_er_ap * wps_er_ap_get_id(struct wps_er *er, unsigned int id)
117 {
118 	struct wps_er_ap *ap;
119 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
120 		if (ap->id == id)
121 			return ap;
122 	}
123 	return NULL;
124 }
125 
126 
wps_er_ap_event(struct wps_context * wps,struct wps_er_ap * ap,enum wps_event event)127 static void wps_er_ap_event(struct wps_context *wps, struct wps_er_ap *ap,
128 			    enum wps_event event)
129 {
130 	union wps_event_data data;
131 	struct wps_event_er_ap *evap = &data.ap;
132 
133 	if (wps->event_cb == NULL)
134 		return;
135 
136 	os_memset(&data, 0, sizeof(data));
137 	evap->uuid = ap->uuid;
138 	evap->friendly_name = ap->friendly_name;
139 	evap->manufacturer = ap->manufacturer;
140 	evap->manufacturer_url = ap->manufacturer_url;
141 	evap->model_description = ap->model_description;
142 	evap->model_name = ap->model_name;
143 	evap->model_number = ap->model_number;
144 	evap->model_url = ap->model_url;
145 	evap->serial_number = ap->serial_number;
146 	evap->upc = ap->upc;
147 	evap->pri_dev_type = ap->pri_dev_type;
148 	evap->wps_state = ap->wps_state;
149 	evap->mac_addr = ap->mac_addr;
150 	wps->event_cb(wps->cb_ctx, event, &data);
151 }
152 
153 
wps_er_ap_free(struct wps_er_ap * ap)154 static void wps_er_ap_free(struct wps_er_ap *ap)
155 {
156 	http_client_free(ap->http);
157 	ap->http = NULL;
158 
159 	os_free(ap->location);
160 	os_free(ap->friendly_name);
161 	os_free(ap->manufacturer);
162 	os_free(ap->manufacturer_url);
163 	os_free(ap->model_description);
164 	os_free(ap->model_name);
165 	os_free(ap->model_number);
166 	os_free(ap->model_url);
167 	os_free(ap->serial_number);
168 	os_free(ap->udn);
169 	os_free(ap->upc);
170 
171 	os_free(ap->scpd_url);
172 	os_free(ap->control_url);
173 	os_free(ap->event_sub_url);
174 
175 	os_free(ap->ap_settings);
176 
177 	os_free(ap);
178 }
179 
180 
wps_er_ap_unsubscribed(struct wps_er * er,struct wps_er_ap * ap)181 static void wps_er_ap_unsubscribed(struct wps_er *er, struct wps_er_ap *ap)
182 {
183 	wpa_printf(MSG_DEBUG, "WPS ER: Unsubscribed from AP %s (%s)",
184 		   inet_ntoa(ap->addr), ap->location);
185 	dl_list_del(&ap->list);
186 	wps_er_ap_free(ap);
187 
188 	if (er->deinitializing && dl_list_empty(&er->ap_unsubscribing))
189 		wps_er_deinit_finish(er, NULL);
190 }
191 
192 
wps_er_http_unsubscribe_cb(void * ctx,struct http_client * c,enum http_client_event event)193 static void wps_er_http_unsubscribe_cb(void *ctx, struct http_client *c,
194 				       enum http_client_event event)
195 {
196 	struct wps_er_ap *ap = ctx;
197 
198 	switch (event) {
199 	case HTTP_CLIENT_OK:
200 		wpa_printf(MSG_DEBUG, "WPS ER: Unsubscribed from events");
201 		ap->subscribed = 0;
202 		break;
203 	case HTTP_CLIENT_FAILED:
204 	case HTTP_CLIENT_INVALID_REPLY:
205 	case HTTP_CLIENT_TIMEOUT:
206 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to unsubscribe from "
207 			   "events");
208 		break;
209 	}
210 	http_client_free(ap->http);
211 	ap->http = NULL;
212 
213 	/*
214 	 * Need to get rid of the AP entry regardless of whether we managed to
215 	 * unsubscribe cleanly or not.
216 	 */
217 	wps_er_ap_unsubscribed(ap->er, ap);
218 }
219 
220 
wps_er_ap_unsubscribe(struct wps_er * er,struct wps_er_ap * ap)221 static void wps_er_ap_unsubscribe(struct wps_er *er, struct wps_er_ap *ap)
222 {
223 	struct wpabuf *req;
224 	struct sockaddr_in dst;
225 	char *url, *path;
226 	char sid[100];
227 
228 	if (ap->event_sub_url == NULL) {
229 		wpa_printf(MSG_DEBUG, "WPS ER: No eventSubURL - cannot "
230 			   "subscribe");
231 		goto fail;
232 	}
233 	if (ap->http) {
234 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP request - cannot "
235 			   "send subscribe request");
236 		goto fail;
237 	}
238 
239 	url = http_client_url_parse(ap->event_sub_url, &dst, &path);
240 	if (url == NULL) {
241 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse eventSubURL");
242 		goto fail;
243 	}
244 
245 	req = wpabuf_alloc(os_strlen(ap->event_sub_url) + 1000);
246 	if (req == NULL) {
247 		os_free(url);
248 		goto fail;
249 	}
250 	uuid_bin2str(ap->sid, sid, sizeof(sid));
251 	wpabuf_printf(req,
252 		      "UNSUBSCRIBE %s HTTP/1.1\r\n"
253 		      "HOST: %s:%d\r\n"
254 		      "SID: uuid:%s\r\n"
255 		      "\r\n",
256 		      path, inet_ntoa(dst.sin_addr), ntohs(dst.sin_port), sid);
257 	os_free(url);
258 	wpa_hexdump_ascii(MSG_MSGDUMP, "WPS ER: Unsubscription request",
259 			  wpabuf_head(req), wpabuf_len(req));
260 
261 	ap->http = http_client_addr(&dst, req, 1000,
262 				    wps_er_http_unsubscribe_cb, ap);
263 	if (ap->http == NULL) {
264 		wpabuf_free(req);
265 		goto fail;
266 	}
267 	return;
268 
269 fail:
270 	/*
271 	 * Need to get rid of the AP entry even when we fail to unsubscribe
272 	 * cleanly.
273 	 */
274 	wps_er_ap_unsubscribed(ap->er, ap);
275 }
276 
277 
wps_er_ap_get_settings(struct wps_er * er,const u8 * uuid)278 static struct wps_er_ap_settings * wps_er_ap_get_settings(struct wps_er *er,
279 							  const u8 *uuid)
280 {
281 	struct wps_er_ap_settings *s;
282 	dl_list_for_each(s, &er->ap_settings, struct wps_er_ap_settings, list)
283 		if (os_memcmp(uuid, s->uuid, WPS_UUID_LEN) == 0)
284 			return s;
285 	return NULL;
286 }
287 
288 
wps_er_ap_cache_settings(struct wps_er * er,struct in_addr * addr)289 int wps_er_ap_cache_settings(struct wps_er *er, struct in_addr *addr)
290 {
291 	struct wps_er_ap *ap;
292 	struct wps_er_ap_settings *settings;
293 
294 	ap = wps_er_ap_get(er, addr, NULL, NULL);
295 	if (ap == NULL || ap->ap_settings == NULL)
296 		return -1;
297 
298 	settings = wps_er_ap_get_settings(er, ap->uuid);
299 	if (!settings) {
300 		settings = os_zalloc(sizeof(*settings));
301 		if (settings == NULL)
302 			return -1;
303 		os_memcpy(settings->uuid, ap->uuid, WPS_UUID_LEN);
304 		dl_list_add(&er->ap_settings, &settings->list);
305 	}
306 	os_memcpy(&settings->ap_settings, ap->ap_settings,
307 		  sizeof(struct wps_credential));
308 
309 	return 0;
310 }
311 
312 
wps_er_ap_use_cached_settings(struct wps_er * er,struct wps_er_ap * ap)313 static int wps_er_ap_use_cached_settings(struct wps_er *er,
314 					 struct wps_er_ap *ap)
315 {
316 	struct wps_er_ap_settings *s;
317 
318 	if (ap->ap_settings)
319 		return 0;
320 
321 	s = wps_er_ap_get_settings(ap->er, ap->uuid);
322 	if (!s)
323 		return -1;
324 
325 	ap->ap_settings = os_memdup(&s->ap_settings, sizeof(*ap->ap_settings));
326 	if (ap->ap_settings == NULL)
327 		return -1;
328 
329 	wpa_printf(MSG_DEBUG, "WPS ER: Use cached AP settings");
330 	return 0;
331 }
332 
333 
wps_er_ap_remove_entry(struct wps_er * er,struct wps_er_ap * ap)334 static void wps_er_ap_remove_entry(struct wps_er *er, struct wps_er_ap *ap)
335 {
336 	wpa_printf(MSG_DEBUG, "WPS ER: Removing AP entry for %s (%s)",
337 		   inet_ntoa(ap->addr), ap->location);
338 	eloop_cancel_timeout(wps_er_ap_timeout, er, ap);
339 	wps_er_sta_remove_all(ap);
340 	wps_er_ap_event(er->wps, ap, WPS_EV_ER_AP_REMOVE);
341 	http_client_free(ap->http);
342 	ap->http = NULL;
343 	if (ap->wps) {
344 		wps_deinit(ap->wps);
345 		ap->wps = NULL;
346 	}
347 
348 	dl_list_del(&ap->list);
349 	if (ap->subscribed) {
350 		dl_list_add(&er->ap_unsubscribing, &ap->list);
351 		wps_er_ap_unsubscribe(er, ap);
352 	} else
353 		wps_er_ap_free(ap);
354 }
355 
356 
wps_er_ap_timeout(void * eloop_data,void * user_ctx)357 static void wps_er_ap_timeout(void *eloop_data, void *user_ctx)
358 {
359 	struct wps_er *er = eloop_data;
360 	struct wps_er_ap *ap = user_ctx;
361 	wpa_printf(MSG_DEBUG, "WPS ER: AP advertisement timed out");
362 	wps_er_ap_remove_entry(er, ap);
363 }
364 
365 
wps_er_get_sid(struct wps_er_ap * ap,char * sid)366 static int wps_er_get_sid(struct wps_er_ap *ap, char *sid)
367 {
368 	char *pos;
369 	char txt[100];
370 
371 	if (!sid) {
372 		wpa_printf(MSG_DEBUG, "WPS ER: No SID received from %s (%s)",
373 			   inet_ntoa(ap->addr), ap->location);
374 		return -1;
375 	}
376 
377 	pos = os_strstr(sid, "uuid:");
378 	if (!pos) {
379 		wpa_printf(MSG_DEBUG, "WPS ER: Invalid SID received from "
380 			   "%s (%s): '%s'", inet_ntoa(ap->addr), ap->location,
381 			   sid);
382 		return -1;
383 	}
384 
385 	pos += 5;
386 	if (uuid_str2bin(pos, ap->sid) < 0) {
387 		wpa_printf(MSG_DEBUG, "WPS ER: Invalid SID received from "
388 			   "%s (%s): '%s'", inet_ntoa(ap->addr), ap->location,
389 			   sid);
390 		return -1;
391 	}
392 
393 	uuid_bin2str(ap->sid, txt, sizeof(txt));
394 	wpa_printf(MSG_DEBUG, "WPS ER: SID for subscription with %s (%s): %s",
395 		   inet_ntoa(ap->addr), ap->location, txt);
396 
397 	return 0;
398 }
399 
400 
wps_er_http_subscribe_cb(void * ctx,struct http_client * c,enum http_client_event event)401 static void wps_er_http_subscribe_cb(void *ctx, struct http_client *c,
402 				     enum http_client_event event)
403 {
404 	struct wps_er_ap *ap = ctx;
405 
406 	switch (event) {
407 	case HTTP_CLIENT_OK:
408 		wpa_printf(MSG_DEBUG, "WPS ER: Subscribed to events");
409 		ap->subscribed = 1;
410 		wps_er_get_sid(ap, http_client_get_hdr_line(c, "SID"));
411 		wps_er_ap_use_cached_settings(ap->er, ap);
412 		wps_er_ap_event(ap->er->wps, ap, WPS_EV_ER_AP_ADD);
413 		break;
414 	case HTTP_CLIENT_FAILED:
415 	case HTTP_CLIENT_INVALID_REPLY:
416 	case HTTP_CLIENT_TIMEOUT:
417 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to subscribe to events");
418 		break;
419 	}
420 	http_client_free(ap->http);
421 	ap->http = NULL;
422 }
423 
424 
wps_er_subscribe(struct wps_er_ap * ap)425 static void wps_er_subscribe(struct wps_er_ap *ap)
426 {
427 	struct wpabuf *req;
428 	struct sockaddr_in dst;
429 	char *url, *path;
430 
431 	if (ap->event_sub_url == NULL) {
432 		wpa_printf(MSG_DEBUG, "WPS ER: No eventSubURL - cannot "
433 			   "subscribe");
434 		return;
435 	}
436 	if (ap->http) {
437 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP request - cannot "
438 			   "send subscribe request");
439 		return;
440 	}
441 
442 	url = http_client_url_parse(ap->event_sub_url, &dst, &path);
443 	if (url == NULL) {
444 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse eventSubURL");
445 		return;
446 	}
447 
448 	req = wpabuf_alloc(os_strlen(ap->event_sub_url) + 1000);
449 	if (req == NULL) {
450 		os_free(url);
451 		return;
452 	}
453 	wpabuf_printf(req,
454 		      "SUBSCRIBE %s HTTP/1.1\r\n"
455 		      "HOST: %s:%d\r\n"
456 		      "CALLBACK: <http://%s:%d/event/%u/%u>\r\n"
457 		      "NT: upnp:event\r\n"
458 		      "TIMEOUT: Second-%d\r\n"
459 		      "\r\n",
460 		      path, inet_ntoa(dst.sin_addr), ntohs(dst.sin_port),
461 		      ap->er->ip_addr_text, ap->er->http_port,
462 		      ap->er->event_id, ap->id, 1800);
463 	os_free(url);
464 	wpa_hexdump_ascii(MSG_MSGDUMP, "WPS ER: Subscription request",
465 			  wpabuf_head(req), wpabuf_len(req));
466 
467 	ap->http = http_client_addr(&dst, req, 1000, wps_er_http_subscribe_cb,
468 				    ap);
469 	if (ap->http == NULL)
470 		wpabuf_free(req);
471 }
472 
473 
wps_er_ap_get_m1(struct wps_er_ap * ap,struct wpabuf * m1)474 static void wps_er_ap_get_m1(struct wps_er_ap *ap, struct wpabuf *m1)
475 {
476 	struct wps_parse_attr attr;
477 
478 	if (wps_parse_msg(m1, &attr) < 0) {
479 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse M1");
480 		return;
481 	}
482 	if (attr.primary_dev_type)
483 		os_memcpy(ap->pri_dev_type, attr.primary_dev_type, 8);
484 	if (attr.wps_state)
485 		ap->wps_state = *attr.wps_state;
486 	if (attr.mac_addr)
487 		os_memcpy(ap->mac_addr, attr.mac_addr, ETH_ALEN);
488 
489 	wps_er_subscribe(ap);
490 }
491 
492 
wps_er_get_device_info(struct wps_er_ap * ap)493 static void wps_er_get_device_info(struct wps_er_ap *ap)
494 {
495 	wps_er_send_get_device_info(ap, wps_er_ap_get_m1);
496 }
497 
498 
wps_er_find_wfadevice(const char * data)499 static const char * wps_er_find_wfadevice(const char *data)
500 {
501 	const char *tag, *tagname, *end;
502 	char *val;
503 	int found = 0;
504 
505 	while (!found) {
506 		/* Find next <device> */
507 		for (;;) {
508 			if (xml_next_tag(data, &tag, &tagname, &end))
509 				return NULL;
510 			data = end;
511 			if (!os_strncasecmp(tagname, "device", 6) &&
512 			    *tag != '/' &&
513 			    (tagname[6] == '>' || !isgraph(tagname[6]))) {
514 				break;
515 			}
516 		}
517 
518 		/* Check whether deviceType is WFADevice */
519 		val = xml_get_first_item(data, "deviceType");
520 		if (val == NULL)
521 			return NULL;
522 		wpa_printf(MSG_DEBUG, "WPS ER: Found deviceType '%s'", val);
523 		found = os_strcasecmp(val, "urn:schemas-wifialliance-org:"
524 				      "device:WFADevice:1") == 0;
525 		os_free(val);
526 	}
527 
528 	return data;
529 }
530 
531 
wps_er_parse_device_description(struct wps_er_ap * ap,struct wpabuf * reply)532 static void wps_er_parse_device_description(struct wps_er_ap *ap,
533 					    struct wpabuf *reply)
534 {
535 	/* Note: reply includes null termination after the buffer data */
536 	const char *tmp, *data = wpabuf_head(reply);
537 	char *pos;
538 
539 	wpa_hexdump_ascii(MSG_MSGDUMP, "WPS ER: Device info",
540 			  wpabuf_head(reply), wpabuf_len(reply));
541 
542 	/*
543 	 * The root device description may include multiple devices, so first
544 	 * find the beginning of the WFADevice description to allow the
545 	 * simplistic parser to pick the correct entries.
546 	 */
547 	tmp = wps_er_find_wfadevice(data);
548 	if (tmp == NULL) {
549 		wpa_printf(MSG_DEBUG, "WPS ER: WFADevice:1 device not found - "
550 			   "trying to parse invalid data");
551 	} else
552 		data = tmp;
553 
554 	ap->friendly_name = xml_get_first_item(data, "friendlyName");
555 	wpa_printf(MSG_DEBUG, "WPS ER: friendlyName='%s'", ap->friendly_name);
556 
557 	ap->manufacturer = xml_get_first_item(data, "manufacturer");
558 	wpa_printf(MSG_DEBUG, "WPS ER: manufacturer='%s'", ap->manufacturer);
559 
560 	ap->manufacturer_url = xml_get_first_item(data, "manufacturerURL");
561 	wpa_printf(MSG_DEBUG, "WPS ER: manufacturerURL='%s'",
562 		   ap->manufacturer_url);
563 
564 	ap->model_description = xml_get_first_item(data, "modelDescription");
565 	wpa_printf(MSG_DEBUG, "WPS ER: modelDescription='%s'",
566 		   ap->model_description);
567 
568 	ap->model_name = xml_get_first_item(data, "modelName");
569 	wpa_printf(MSG_DEBUG, "WPS ER: modelName='%s'", ap->model_name);
570 
571 	ap->model_number = xml_get_first_item(data, "modelNumber");
572 	wpa_printf(MSG_DEBUG, "WPS ER: modelNumber='%s'", ap->model_number);
573 
574 	ap->model_url = xml_get_first_item(data, "modelURL");
575 	wpa_printf(MSG_DEBUG, "WPS ER: modelURL='%s'", ap->model_url);
576 
577 	ap->serial_number = xml_get_first_item(data, "serialNumber");
578 	wpa_printf(MSG_DEBUG, "WPS ER: serialNumber='%s'", ap->serial_number);
579 
580 	ap->udn = xml_get_first_item(data, "UDN");
581 	if (ap->udn) {
582 		wpa_printf(MSG_DEBUG, "WPS ER: UDN='%s'", ap->udn);
583 		pos = os_strstr(ap->udn, "uuid:");
584 		if (pos) {
585 			pos += 5;
586 			if (uuid_str2bin(pos, ap->uuid) < 0)
587 				wpa_printf(MSG_DEBUG,
588 					   "WPS ER: Invalid UUID in UDN");
589 		}
590 	}
591 
592 	ap->upc = xml_get_first_item(data, "UPC");
593 	wpa_printf(MSG_DEBUG, "WPS ER: UPC='%s'", ap->upc);
594 
595 	ap->scpd_url = http_link_update(
596 		xml_get_first_item(data, "SCPDURL"), ap->location);
597 	wpa_printf(MSG_DEBUG, "WPS ER: SCPDURL='%s'", ap->scpd_url);
598 
599 	ap->control_url = http_link_update(
600 		xml_get_first_item(data, "controlURL"), ap->location);
601 	wpa_printf(MSG_DEBUG, "WPS ER: controlURL='%s'", ap->control_url);
602 
603 	ap->event_sub_url = http_link_update(
604 		xml_get_first_item(data, "eventSubURL"), ap->location);
605 	wpa_printf(MSG_DEBUG, "WPS ER: eventSubURL='%s'", ap->event_sub_url);
606 }
607 
608 
wps_er_http_dev_desc_cb(void * ctx,struct http_client * c,enum http_client_event event)609 static void wps_er_http_dev_desc_cb(void *ctx, struct http_client *c,
610 				    enum http_client_event event)
611 {
612 	struct wps_er_ap *ap = ctx;
613 	struct wpabuf *reply;
614 	int ok = 0;
615 
616 	switch (event) {
617 	case HTTP_CLIENT_OK:
618 		reply = http_client_get_body(c);
619 		if (reply == NULL)
620 			break;
621 		wps_er_parse_device_description(ap, reply);
622 		ok = 1;
623 		break;
624 	case HTTP_CLIENT_FAILED:
625 	case HTTP_CLIENT_INVALID_REPLY:
626 	case HTTP_CLIENT_TIMEOUT:
627 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to fetch device info");
628 		break;
629 	}
630 	http_client_free(ap->http);
631 	ap->http = NULL;
632 	if (ok)
633 		wps_er_get_device_info(ap);
634 }
635 
636 
wps_er_ap_add(struct wps_er * er,const u8 * uuid,struct in_addr * addr,const char * location,int max_age)637 void wps_er_ap_add(struct wps_er *er, const u8 *uuid, struct in_addr *addr,
638 		   const char *location, int max_age)
639 {
640 	struct wps_er_ap *ap;
641 
642 	ap = wps_er_ap_get(er, addr, uuid, NULL);
643 	if (ap) {
644 		/* Update advertisement timeout */
645 		eloop_cancel_timeout(wps_er_ap_timeout, er, ap);
646 		eloop_register_timeout(max_age, 0, wps_er_ap_timeout, er, ap);
647 		return;
648 	}
649 
650 	ap = os_zalloc(sizeof(*ap));
651 	if (ap == NULL)
652 		return;
653 	dl_list_init(&ap->sta);
654 	ap->er = er;
655 	ap->id = ++er->next_ap_id;
656 	ap->location = os_strdup(location);
657 	if (ap->location == NULL) {
658 		os_free(ap);
659 		return;
660 	}
661 	dl_list_add(&er->ap, &ap->list);
662 
663 	ap->addr.s_addr = addr->s_addr;
664 	os_memcpy(ap->uuid, uuid, WPS_UUID_LEN);
665 	eloop_register_timeout(max_age, 0, wps_er_ap_timeout, er, ap);
666 
667 	wpa_printf(MSG_DEBUG, "WPS ER: Added AP entry for %s (%s)",
668 		   inet_ntoa(ap->addr), ap->location);
669 
670 	/* Fetch device description */
671 	ap->http = http_client_url(ap->location, NULL, 10000,
672 				   wps_er_http_dev_desc_cb, ap);
673 }
674 
675 
wps_er_ap_remove(struct wps_er * er,struct in_addr * addr)676 void wps_er_ap_remove(struct wps_er *er, struct in_addr *addr)
677 {
678 	struct wps_er_ap *ap;
679 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
680 		if (ap->addr.s_addr == addr->s_addr) {
681 			wps_er_ap_remove_entry(er, ap);
682 			return;
683 		}
684 	}
685 }
686 
687 
wps_er_ap_remove_all(struct wps_er * er)688 static void wps_er_ap_remove_all(struct wps_er *er)
689 {
690 	struct wps_er_ap *prev, *ap;
691 	struct wps_er_ap_settings *prev_s, *s;
692 	dl_list_for_each_safe(ap, prev, &er->ap, struct wps_er_ap, list)
693 		wps_er_ap_remove_entry(er, ap);
694 	dl_list_for_each_safe(s, prev_s, &er->ap_settings,
695 			      struct wps_er_ap_settings, list)
696 		os_free(s);
697 }
698 
699 
http_put_date(struct wpabuf * buf)700 static void http_put_date(struct wpabuf *buf)
701 {
702 	wpabuf_put_str(buf, "Date: ");
703 	format_date(buf);
704 	wpabuf_put_str(buf, "\r\n");
705 }
706 
707 
wps_er_http_resp_not_found(struct http_request * req)708 static void wps_er_http_resp_not_found(struct http_request *req)
709 {
710 	struct wpabuf *buf;
711 	buf = wpabuf_alloc(200);
712 	if (buf == NULL) {
713 		http_request_deinit(req);
714 		return;
715 	}
716 
717 	wpabuf_put_str(buf,
718 		       "HTTP/1.1 404 Not Found\r\n"
719 		       "Server: unspecified, UPnP/1.0, unspecified\r\n"
720 		       "Connection: close\r\n");
721 	http_put_date(buf);
722 	wpabuf_put_str(buf, "\r\n");
723 	http_request_send_and_deinit(req, buf);
724 }
725 
726 
wps_er_http_resp_ok(struct http_request * req)727 static void wps_er_http_resp_ok(struct http_request *req)
728 {
729 	struct wpabuf *buf;
730 	buf = wpabuf_alloc(200);
731 	if (buf == NULL) {
732 		http_request_deinit(req);
733 		return;
734 	}
735 
736 	wpabuf_put_str(buf,
737 		       "HTTP/1.1 200 OK\r\n"
738 		       "Server: unspecified, UPnP/1.0, unspecified\r\n"
739 		       "Connection: close\r\n"
740 		       "Content-Length: 0\r\n");
741 	http_put_date(buf);
742 	wpabuf_put_str(buf, "\r\n");
743 	http_request_send_and_deinit(req, buf);
744 }
745 
746 
wps_er_sta_timeout(void * eloop_data,void * user_ctx)747 static void wps_er_sta_timeout(void *eloop_data, void *user_ctx)
748 {
749 	struct wps_er_sta *sta = eloop_data;
750 	wpa_printf(MSG_DEBUG, "WPS ER: STA entry timed out");
751 	dl_list_del(&sta->list);
752 	wps_er_sta_free(sta);
753 }
754 
755 
wps_er_add_sta_data(struct wps_er_ap * ap,const u8 * addr,struct wps_parse_attr * attr,int probe_req)756 static struct wps_er_sta * wps_er_add_sta_data(struct wps_er_ap *ap,
757 					       const u8 *addr,
758 					       struct wps_parse_attr *attr,
759 					       int probe_req)
760 {
761 	struct wps_er_sta *sta = wps_er_sta_get(ap, addr, NULL);
762 	int new_sta = 0;
763 	int m1;
764 
765 	m1 = !probe_req && attr->msg_type && *attr->msg_type == WPS_M1;
766 
767 	if (sta == NULL) {
768 		/*
769 		 * Only allow new STA entry to be added based on Probe Request
770 		 * or M1. This will filter out bogus events and anything that
771 		 * may have been ongoing at the time ER subscribed for events.
772 		 */
773 		if (!probe_req && !m1)
774 			return NULL;
775 
776 		sta = os_zalloc(sizeof(*sta));
777 		if (sta == NULL)
778 			return NULL;
779 		os_memcpy(sta->addr, addr, ETH_ALEN);
780 		sta->ap = ap;
781 		dl_list_add(&ap->sta, &sta->list);
782 		new_sta = 1;
783 	}
784 
785 	if (m1)
786 		sta->m1_received = 1;
787 
788 	if (attr->config_methods && (!probe_req || !sta->m1_received))
789 		sta->config_methods = WPA_GET_BE16(attr->config_methods);
790 	if (attr->uuid_e && (!probe_req || !sta->m1_received))
791 		os_memcpy(sta->uuid, attr->uuid_e, WPS_UUID_LEN);
792 	if (attr->primary_dev_type && (!probe_req || !sta->m1_received))
793 		os_memcpy(sta->pri_dev_type, attr->primary_dev_type, 8);
794 	if (attr->dev_password_id && (!probe_req || !sta->m1_received))
795 		sta->dev_passwd_id = WPA_GET_BE16(attr->dev_password_id);
796 
797 	if (attr->manufacturer) {
798 		os_free(sta->manufacturer);
799 		sta->manufacturer = dup_binstr(attr->manufacturer,
800 					       attr->manufacturer_len);
801 	}
802 
803 	if (attr->model_name) {
804 		os_free(sta->model_name);
805 		sta->model_name = dup_binstr(attr->model_name,
806 					     attr->model_name_len);
807 	}
808 
809 	if (attr->model_number) {
810 		os_free(sta->model_number);
811 		sta->model_number = dup_binstr(attr->model_number,
812 					       attr->model_number_len);
813 	}
814 
815 	if (attr->serial_number) {
816 		os_free(sta->serial_number);
817 		sta->serial_number = dup_binstr(attr->serial_number,
818 						attr->serial_number_len);
819 	}
820 
821 	if (attr->dev_name) {
822 		os_free(sta->dev_name);
823 		sta->dev_name = dup_binstr(attr->dev_name, attr->dev_name_len);
824 	}
825 
826 	eloop_cancel_timeout(wps_er_sta_timeout, sta, NULL);
827 	eloop_register_timeout(300, 0, wps_er_sta_timeout, sta, NULL);
828 
829 	if (m1 || new_sta)
830 		wps_er_sta_event(ap->er->wps, sta, WPS_EV_ER_ENROLLEE_ADD);
831 
832 	return sta;
833 }
834 
835 
wps_er_process_wlanevent_probe_req(struct wps_er_ap * ap,const u8 * addr,struct wpabuf * msg)836 static void wps_er_process_wlanevent_probe_req(struct wps_er_ap *ap,
837 					       const u8 *addr,
838 					       struct wpabuf *msg)
839 {
840 	struct wps_parse_attr attr;
841 
842 	wpa_printf(MSG_DEBUG, "WPS ER: WLANEvent - Probe Request - from "
843 		   MACSTR, MAC2STR(addr));
844 	wpa_hexdump_buf(MSG_MSGDUMP, "WPS ER: WLANEvent - Enrollee's message "
845 			"(TLVs from Probe Request)", msg);
846 
847 	if (wps_validate_probe_req(msg, addr) < 0) {
848 		wpa_printf(MSG_INFO, "WPS-STRICT: ER: Ignore invalid proxied "
849 			   "Probe Request frame from " MACSTR, MAC2STR(addr));
850 		return;
851 	}
852 
853 	if (wps_parse_msg(msg, &attr) < 0) {
854 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse TLVs in "
855 			   "WLANEvent message");
856 		return;
857 	}
858 
859 	wps_er_add_sta_data(ap, addr, &attr, 1);
860 	wps_registrar_probe_req_rx(ap->er->wps->registrar, addr, msg, 0);
861 }
862 
863 
wps_er_http_put_wlan_response_cb(void * ctx,struct http_client * c,enum http_client_event event)864 static void wps_er_http_put_wlan_response_cb(void *ctx, struct http_client *c,
865 					     enum http_client_event event)
866 {
867 	struct wps_er_sta *sta = ctx;
868 
869 	switch (event) {
870 	case HTTP_CLIENT_OK:
871 		wpa_printf(MSG_DEBUG, "WPS ER: PutWLANResponse OK");
872 		break;
873 	case HTTP_CLIENT_FAILED:
874 	case HTTP_CLIENT_INVALID_REPLY:
875 	case HTTP_CLIENT_TIMEOUT:
876 		wpa_printf(MSG_DEBUG, "WPS ER: PutWLANResponse failed");
877 		break;
878 	}
879 	http_client_free(sta->http);
880 	sta->http = NULL;
881 }
882 
883 
884 static const char *soap_prefix =
885 	"<?xml version=\"1.0\"?>\n"
886 	"<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" "
887 	"s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\n"
888 	"<s:Body>\n";
889 static const char *soap_postfix =
890 	"</s:Body>\n</s:Envelope>\n";
891 static const char *urn_wfawlanconfig =
892 	"urn:schemas-wifialliance-org:service:WFAWLANConfig:1";
893 
wps_er_soap_hdr(const struct wpabuf * msg,const char * name,const char * arg_name,const char * path,const struct sockaddr_in * dst,char ** len_ptr,char ** body_ptr)894 static struct wpabuf * wps_er_soap_hdr(const struct wpabuf *msg,
895 				       const char *name, const char *arg_name,
896 				       const char *path,
897 				       const struct sockaddr_in *dst,
898 				       char **len_ptr, char **body_ptr)
899 {
900 	unsigned char *encoded;
901 	size_t encoded_len;
902 	struct wpabuf *buf;
903 
904 	if (msg) {
905 		encoded = base64_encode(wpabuf_head(msg), wpabuf_len(msg),
906 					&encoded_len);
907 		if (encoded == NULL)
908 			return NULL;
909 	} else {
910 		encoded = NULL;
911 		encoded_len = 0;
912 	}
913 
914 	buf = wpabuf_alloc(1000 + encoded_len);
915 	if (buf == NULL) {
916 		os_free(encoded);
917 		return NULL;
918 	}
919 
920 	wpabuf_printf(buf,
921 		      "POST %s HTTP/1.1\r\n"
922 		      "Host: %s:%d\r\n"
923 		      "Content-Type: text/xml; charset=\"utf-8\"\r\n"
924 		      "Content-Length: ",
925 		      path, inet_ntoa(dst->sin_addr), ntohs(dst->sin_port));
926 
927 	*len_ptr = wpabuf_put(buf, 0);
928 	wpabuf_printf(buf,
929 		      "        \r\n"
930 		      "SOAPACTION: \"%s#%s\"\r\n"
931 		      "\r\n",
932 		      urn_wfawlanconfig, name);
933 
934 	*body_ptr = wpabuf_put(buf, 0);
935 
936 	wpabuf_put_str(buf, soap_prefix);
937 	wpabuf_printf(buf, "<u:%s xmlns:u=\"", name);
938 	wpabuf_put_str(buf, urn_wfawlanconfig);
939 	wpabuf_put_str(buf, "\">\n");
940 	if (encoded) {
941 		wpabuf_printf(buf, "<%s>%s</%s>\n",
942 			      arg_name, (char *) encoded, arg_name);
943 		os_free(encoded);
944 	}
945 
946 	return buf;
947 }
948 
949 
wps_er_soap_end(struct wpabuf * buf,const char * name,char * len_ptr,char * body_ptr)950 static void wps_er_soap_end(struct wpabuf *buf, const char *name,
951 			    char *len_ptr, char *body_ptr)
952 {
953 	char len_buf[10];
954 	wpabuf_printf(buf, "</u:%s>\n", name);
955 	wpabuf_put_str(buf, soap_postfix);
956 	os_snprintf(len_buf, sizeof(len_buf), "%d",
957 		    (int) ((char *) wpabuf_put(buf, 0) - body_ptr));
958 	os_memcpy(len_ptr, len_buf, os_strlen(len_buf));
959 }
960 
961 
wps_er_sta_send_msg(struct wps_er_sta * sta,struct wpabuf * msg)962 static void wps_er_sta_send_msg(struct wps_er_sta *sta, struct wpabuf *msg)
963 {
964 	struct wpabuf *buf;
965 	char *len_ptr, *body_ptr;
966 	struct sockaddr_in dst;
967 	char *url, *path;
968 
969 	if (sta->http) {
970 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP request for STA - "
971 			   "ignore new request");
972 		wpabuf_free(msg);
973 		return;
974 	}
975 
976 	if (sta->ap->control_url == NULL) {
977 		wpa_printf(MSG_DEBUG, "WPS ER: No controlURL for AP");
978 		wpabuf_free(msg);
979 		return;
980 	}
981 
982 	url = http_client_url_parse(sta->ap->control_url, &dst, &path);
983 	if (url == NULL) {
984 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse controlURL");
985 		wpabuf_free(msg);
986 		return;
987 	}
988 
989 	buf = wps_er_soap_hdr(msg, "PutWLANResponse", "NewMessage", path, &dst,
990 			      &len_ptr, &body_ptr);
991 	wpabuf_free(msg);
992 	os_free(url);
993 	if (buf == NULL)
994 		return;
995 	wpabuf_printf(buf, "<NewWLANEventType>%d</NewWLANEventType>\n",
996 		      UPNP_WPS_WLANEVENT_TYPE_EAP);
997 	wpabuf_printf(buf, "<NewWLANEventMAC>" MACSTR "</NewWLANEventMAC>\n",
998 		      MAC2STR(sta->addr));
999 
1000 	wps_er_soap_end(buf, "PutWLANResponse", len_ptr, body_ptr);
1001 
1002 	sta->http = http_client_addr(&dst, buf, 1000,
1003 				     wps_er_http_put_wlan_response_cb, sta);
1004 	if (sta->http == NULL)
1005 		wpabuf_free(buf);
1006 }
1007 
1008 
wps_er_sta_process(struct wps_er_sta * sta,struct wpabuf * msg,enum wsc_op_code op_code)1009 static void wps_er_sta_process(struct wps_er_sta *sta, struct wpabuf *msg,
1010 			       enum wsc_op_code op_code)
1011 {
1012 	enum wps_process_res res;
1013 
1014 	res = wps_process_msg(sta->wps, op_code, msg);
1015 	if (res == WPS_CONTINUE) {
1016 		struct wpabuf *next = wps_get_msg(sta->wps, &op_code);
1017 		if (next)
1018 			wps_er_sta_send_msg(sta, next);
1019 	} else {
1020 		wpa_printf(MSG_DEBUG, "WPS ER: Protocol run %s with the "
1021 			   "enrollee (res=%d)",
1022 			   res == WPS_DONE ? "succeeded" : "failed", res);
1023 		wps_deinit(sta->wps);
1024 		sta->wps = NULL;
1025 		if (res == WPS_DONE) {
1026 			/* Remove the STA entry after short timeout */
1027 			eloop_cancel_timeout(wps_er_sta_timeout, sta, NULL);
1028 			eloop_register_timeout(10, 0, wps_er_sta_timeout, sta,
1029 					       NULL);
1030 		}
1031 	}
1032 }
1033 
1034 
wps_er_sta_start(struct wps_er_sta * sta,struct wpabuf * msg)1035 static void wps_er_sta_start(struct wps_er_sta *sta, struct wpabuf *msg)
1036 {
1037 	struct wps_config cfg;
1038 
1039 	if (sta->wps)
1040 		wps_deinit(sta->wps);
1041 
1042 	os_memset(&cfg, 0, sizeof(cfg));
1043 	cfg.wps = sta->ap->er->wps;
1044 	cfg.registrar = 1;
1045 	cfg.peer_addr = sta->addr;
1046 
1047 	sta->wps = wps_init(&cfg);
1048 	if (sta->wps == NULL)
1049 		return;
1050 	sta->wps->er = 1;
1051 	sta->wps->use_cred = sta->ap->ap_settings;
1052 	if (sta->ap->ap_settings) {
1053 		os_free(sta->cred);
1054 		sta->cred = os_malloc(sizeof(*sta->cred));
1055 		if (sta->cred) {
1056 			os_memcpy(sta->cred, sta->ap->ap_settings,
1057 				  sizeof(*sta->cred));
1058 			sta->cred->cred_attr = NULL;
1059 			os_memcpy(sta->cred->mac_addr, sta->addr, ETH_ALEN);
1060 			sta->wps->use_cred = sta->cred;
1061 		}
1062 	}
1063 
1064 	wps_er_sta_process(sta, msg, WSC_MSG);
1065 }
1066 
1067 
wps_er_process_wlanevent_eap(struct wps_er_ap * ap,const u8 * addr,struct wpabuf * msg)1068 static void wps_er_process_wlanevent_eap(struct wps_er_ap *ap, const u8 *addr,
1069 					 struct wpabuf *msg)
1070 {
1071 	struct wps_parse_attr attr;
1072 	struct wps_er_sta *sta;
1073 
1074 	wpa_printf(MSG_DEBUG, "WPS ER: WLANEvent - EAP - from " MACSTR,
1075 		   MAC2STR(addr));
1076 	wpa_hexdump_buf(MSG_MSGDUMP, "WPS ER: WLANEvent - Enrollee's message "
1077 			"(TLVs from EAP-WSC)", msg);
1078 
1079 	if (wps_parse_msg(msg, &attr) < 0) {
1080 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse TLVs in "
1081 			   "WLANEvent message");
1082 		return;
1083 	}
1084 
1085 	sta = wps_er_add_sta_data(ap, addr, &attr, 0);
1086 	if (sta == NULL)
1087 		return;
1088 
1089 	if (attr.msg_type && *attr.msg_type == WPS_M1)
1090 		wps_er_sta_start(sta, msg);
1091 	else if (sta->wps) {
1092 		enum wsc_op_code op_code = WSC_MSG;
1093 		if (attr.msg_type) {
1094 			switch (*attr.msg_type) {
1095 			case WPS_WSC_ACK:
1096 				op_code = WSC_ACK;
1097 				break;
1098 			case WPS_WSC_NACK:
1099 				op_code = WSC_NACK;
1100 				break;
1101 			case WPS_WSC_DONE:
1102 				op_code = WSC_Done;
1103 				break;
1104 			}
1105 		}
1106 		wps_er_sta_process(sta, msg, op_code);
1107 	}
1108 }
1109 
1110 
wps_er_process_wlanevent(struct wps_er_ap * ap,struct wpabuf * event)1111 static void wps_er_process_wlanevent(struct wps_er_ap *ap,
1112 				     struct wpabuf *event)
1113 {
1114 	u8 *data;
1115 	u8 wlan_event_type;
1116 	u8 wlan_event_mac[ETH_ALEN];
1117 	struct wpabuf msg;
1118 
1119 	wpa_hexdump(MSG_MSGDUMP, "WPS ER: Received WLANEvent",
1120 		    wpabuf_head(event), wpabuf_len(event));
1121 	if (wpabuf_len(event) < 1 + 17) {
1122 		wpa_printf(MSG_DEBUG, "WPS ER: Too short WLANEvent");
1123 		return;
1124 	}
1125 
1126 	data = wpabuf_mhead(event);
1127 	wlan_event_type = data[0];
1128 	if (hwaddr_aton((char *) data + 1, wlan_event_mac) < 0) {
1129 		wpa_printf(MSG_DEBUG, "WPS ER: Invalid WLANEventMAC in "
1130 			   "WLANEvent");
1131 		return;
1132 	}
1133 
1134 	wpabuf_set(&msg, data + 1 + 17, wpabuf_len(event) - (1 + 17));
1135 
1136 	switch (wlan_event_type) {
1137 	case 1:
1138 		wps_er_process_wlanevent_probe_req(ap, wlan_event_mac, &msg);
1139 		break;
1140 	case 2:
1141 		wps_er_process_wlanevent_eap(ap, wlan_event_mac, &msg);
1142 		break;
1143 	default:
1144 		wpa_printf(MSG_DEBUG, "WPS ER: Unknown WLANEventType %d",
1145 			   wlan_event_type);
1146 		break;
1147 	}
1148 }
1149 
1150 
wps_er_http_event(struct wps_er * er,struct http_request * req,unsigned int ap_id)1151 static void wps_er_http_event(struct wps_er *er, struct http_request *req,
1152 			      unsigned int ap_id)
1153 {
1154 	struct wps_er_ap *ap = wps_er_ap_get_id(er, ap_id);
1155 	struct wpabuf *event;
1156 	enum http_reply_code ret;
1157 
1158 	if (ap == NULL) {
1159 		wpa_printf(MSG_DEBUG, "WPS ER: HTTP event from unknown AP id "
1160 			   "%u", ap_id);
1161 		wps_er_http_resp_not_found(req);
1162 		return;
1163 	}
1164 	wpa_printf(MSG_MSGDUMP, "WPS ER: HTTP event from AP id %u: %s",
1165 		   ap_id, http_request_get_data(req));
1166 
1167 	event = xml_get_base64_item(http_request_get_data(req), "WLANEvent",
1168 				    &ret);
1169 	if (event == NULL) {
1170 		wpa_printf(MSG_DEBUG, "WPS ER: Could not extract WLANEvent "
1171 			   "from the event notification");
1172 		/*
1173 		 * Reply with OK anyway to avoid getting unregistered from
1174 		 * events.
1175 		 */
1176 		wps_er_http_resp_ok(req);
1177 		return;
1178 	}
1179 
1180 	wps_er_process_wlanevent(ap, event);
1181 
1182 	wpabuf_free(event);
1183 	wps_er_http_resp_ok(req);
1184 }
1185 
1186 
wps_er_http_notify(struct wps_er * er,struct http_request * req)1187 static void wps_er_http_notify(struct wps_er *er, struct http_request *req)
1188 {
1189 	char *uri = http_request_get_uri(req);
1190 
1191 	if (os_strncmp(uri, "/event/", 7) == 0) {
1192 		unsigned int event_id;
1193 		char *pos;
1194 		event_id = atoi(uri + 7);
1195 		if (event_id != er->event_id) {
1196 			wpa_printf(MSG_DEBUG, "WPS ER: HTTP event for an "
1197 				   "unknown event id %u", event_id);
1198 			return;
1199 		}
1200 		pos = os_strchr(uri + 7, '/');
1201 		if (pos == NULL)
1202 			return;
1203 		pos++;
1204 		wps_er_http_event(er, req, atoi(pos));
1205 	} else {
1206 		wpa_printf(MSG_DEBUG, "WPS ER: Unknown HTTP NOTIFY for '%s'",
1207 			   uri);
1208 		wps_er_http_resp_not_found(req);
1209 	}
1210 }
1211 
1212 
wps_er_http_req(void * ctx,struct http_request * req)1213 static void wps_er_http_req(void *ctx, struct http_request *req)
1214 {
1215 	struct wps_er *er = ctx;
1216 	struct sockaddr_in *cli = http_request_get_cli_addr(req);
1217 	enum httpread_hdr_type type = http_request_get_type(req);
1218 	struct wpabuf *buf;
1219 
1220 	wpa_printf(MSG_DEBUG, "WPS ER: HTTP request: '%s' (type %d) from "
1221 		   "%s:%d",
1222 		   http_request_get_uri(req), type,
1223 		   inet_ntoa(cli->sin_addr), ntohs(cli->sin_port));
1224 
1225 	switch (type) {
1226 	case HTTPREAD_HDR_TYPE_NOTIFY:
1227 		wps_er_http_notify(er, req);
1228 		break;
1229 	default:
1230 		wpa_printf(MSG_DEBUG, "WPS ER: Unsupported HTTP request type "
1231 			   "%d", type);
1232 		buf = wpabuf_alloc(200);
1233 		if (buf == NULL) {
1234 			http_request_deinit(req);
1235 			return;
1236 		}
1237 		wpabuf_put_str(buf,
1238 			       "HTTP/1.1 501 Unimplemented\r\n"
1239 			       "Connection: close\r\n");
1240 		http_put_date(buf);
1241 		wpabuf_put_str(buf, "\r\n");
1242 		http_request_send_and_deinit(req, buf);
1243 		break;
1244 	}
1245 }
1246 
1247 
1248 struct wps_er *
wps_er_init(struct wps_context * wps,const char * ifname,const char * filter)1249 wps_er_init(struct wps_context *wps, const char *ifname, const char *filter)
1250 {
1251 	struct wps_er *er;
1252 	struct in_addr addr;
1253 
1254 	er = os_zalloc(sizeof(*er));
1255 	if (er == NULL)
1256 		return NULL;
1257 	dl_list_init(&er->ap);
1258 	dl_list_init(&er->ap_unsubscribing);
1259 	dl_list_init(&er->ap_settings);
1260 
1261 	er->multicast_sd = -1;
1262 	er->ssdp_sd = -1;
1263 
1264 	os_strlcpy(er->ifname, ifname, sizeof(er->ifname));
1265 	er->wps = wps;
1266 	if (os_get_random((unsigned char *) &er->event_id,
1267 			  sizeof(er->event_id)) < 0) {
1268 		wps_er_deinit(er, NULL, NULL);
1269 		return NULL;
1270 	}
1271 	/* Limit event_id to < 32 bits to avoid issues with atoi() */
1272 	er->event_id &= 0x0fffffff;
1273 
1274 	if (filter && os_strncmp(filter, "ifname=", 7) == 0) {
1275 		const char *pos, *end;
1276 		pos = filter + 7;
1277 		end = os_strchr(pos, ' ');
1278 		if (end) {
1279 			size_t len = end - pos;
1280 			os_strlcpy(er->ifname, pos, len < sizeof(er->ifname) ?
1281 				   len + 1 : sizeof(er->ifname));
1282 			filter = end + 1;
1283 		} else {
1284 			os_strlcpy(er->ifname, pos, sizeof(er->ifname));
1285 			filter = NULL;
1286 		}
1287 		er->forced_ifname = 1;
1288 	}
1289 
1290 	if (filter) {
1291 		if (inet_aton(filter, &er->filter_addr) == 0) {
1292 			wpa_printf(MSG_INFO, "WPS UPnP: Invalid filter "
1293 				   "address %s", filter);
1294 			wps_er_deinit(er, NULL, NULL);
1295 			return NULL;
1296 		}
1297 		wpa_printf(MSG_DEBUG, "WPS UPnP: Only accepting connections "
1298 			   "with %s", filter);
1299 	}
1300 	if (get_netif_info(er->ifname, &er->ip_addr, &er->ip_addr_text,
1301 			   er->mac_addr)) {
1302 		wpa_printf(MSG_INFO, "WPS UPnP: Could not get IP/MAC address "
1303 			   "for %s. Does it have IP address?", er->ifname);
1304 		wps_er_deinit(er, NULL, NULL);
1305 		return NULL;
1306 	}
1307 
1308 	if (wps_er_ssdp_init(er) < 0) {
1309 		wpa_printf(MSG_INFO, "WPS UPnP: SSDP initialization failed");
1310 		wps_er_deinit(er, NULL, NULL);
1311 		return NULL;
1312 	}
1313 
1314 	addr.s_addr = er->ip_addr;
1315 	er->http_srv = http_server_init(&addr, -1, wps_er_http_req, er);
1316 	if (er->http_srv == NULL) {
1317 		wpa_printf(MSG_INFO, "WPS UPnP: HTTP initialization failed");
1318 		wps_er_deinit(er, NULL, NULL);
1319 		return NULL;
1320 	}
1321 	er->http_port = http_server_get_port(er->http_srv);
1322 
1323 	wpa_printf(MSG_DEBUG, "WPS ER: Start (ifname=%s ip_addr=%s)",
1324 		   er->ifname, er->ip_addr_text);
1325 
1326 	return er;
1327 }
1328 
1329 
wps_er_refresh(struct wps_er * er)1330 void wps_er_refresh(struct wps_er *er)
1331 {
1332 	struct wps_er_ap *ap;
1333 	struct wps_er_sta *sta;
1334 
1335 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
1336 		wps_er_ap_event(er->wps, ap, WPS_EV_ER_AP_ADD);
1337 		dl_list_for_each(sta, &ap->sta, struct wps_er_sta, list)
1338 			wps_er_sta_event(er->wps, sta, WPS_EV_ER_ENROLLEE_ADD);
1339 	}
1340 
1341 	wps_er_send_ssdp_msearch(er);
1342 }
1343 
1344 
wps_er_deinit_finish(void * eloop_data,void * user_ctx)1345 static void wps_er_deinit_finish(void *eloop_data, void *user_ctx)
1346 {
1347 	struct wps_er *er = eloop_data;
1348 	void (*deinit_done_cb)(void *ctx);
1349 	void *deinit_done_ctx;
1350 	struct wps_er_ap *ap, *tmp;
1351 
1352 	wpa_printf(MSG_DEBUG, "WPS ER: Finishing deinit");
1353 
1354 	dl_list_for_each_safe(ap, tmp, &er->ap_unsubscribing, struct wps_er_ap,
1355 			      list) {
1356 		wpa_printf(MSG_DEBUG, "WPS ER: AP entry for %s (%s) still in ap_unsubscribing list - free it",
1357 			   inet_ntoa(ap->addr), ap->location);
1358 		dl_list_del(&ap->list);
1359 		wps_er_ap_free(ap);
1360 	}
1361 
1362 	eloop_cancel_timeout(wps_er_deinit_finish, er, NULL);
1363 	deinit_done_cb = er->deinit_done_cb;
1364 	deinit_done_ctx = er->deinit_done_ctx;
1365 	os_free(er->ip_addr_text);
1366 	os_free(er);
1367 
1368 	if (deinit_done_cb)
1369 		deinit_done_cb(deinit_done_ctx);
1370 }
1371 
1372 
wps_er_deinit(struct wps_er * er,void (* cb)(void * ctx),void * ctx)1373 void wps_er_deinit(struct wps_er *er, void (*cb)(void *ctx), void *ctx)
1374 {
1375 	if (er == NULL)
1376 		return;
1377 	http_server_deinit(er->http_srv);
1378 	wps_er_ap_remove_all(er);
1379 	wps_er_ssdp_deinit(er);
1380 	eloop_register_timeout(dl_list_empty(&er->ap_unsubscribing) ? 0 : 5, 0,
1381 			       wps_er_deinit_finish, er, NULL);
1382 	wpa_printf(MSG_DEBUG, "WPS ER: Finish deinit from timeout");
1383 	er->deinitializing = 1;
1384 	er->deinit_done_cb = cb;
1385 	er->deinit_done_ctx = ctx;
1386 }
1387 
1388 
wps_er_http_set_sel_reg_cb(void * ctx,struct http_client * c,enum http_client_event event)1389 static void wps_er_http_set_sel_reg_cb(void *ctx, struct http_client *c,
1390 				       enum http_client_event event)
1391 {
1392 	struct wps_er_ap *ap = ctx;
1393 	union wps_event_data data;
1394 
1395 	os_memset(&data, 0, sizeof(data));
1396 
1397 	switch (event) {
1398 	case HTTP_CLIENT_OK:
1399 		wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar OK");
1400 		data.set_sel_reg.state = WPS_ER_SET_SEL_REG_DONE;
1401 		data.set_sel_reg.uuid = ap->uuid;
1402 		break;
1403 	case HTTP_CLIENT_FAILED:
1404 	case HTTP_CLIENT_INVALID_REPLY:
1405 	case HTTP_CLIENT_TIMEOUT:
1406 		wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar failed");
1407 		data.set_sel_reg.state = WPS_ER_SET_SEL_REG_FAILED;
1408 		data.set_sel_reg.uuid = ap->uuid;
1409 		break;
1410 	}
1411 	http_client_free(ap->http);
1412 	ap->http = NULL;
1413 
1414 	if (data.set_sel_reg.uuid)
1415 		ap->er->wps->event_cb(ap->er->wps->cb_ctx,
1416 				      WPS_EV_ER_SET_SELECTED_REGISTRAR, &data);
1417 }
1418 
1419 
wps_er_send_set_sel_reg(struct wps_er_ap * ap,struct wpabuf * msg)1420 static void wps_er_send_set_sel_reg(struct wps_er_ap *ap, struct wpabuf *msg)
1421 {
1422 	struct wpabuf *buf;
1423 	char *len_ptr, *body_ptr;
1424 	struct sockaddr_in dst;
1425 	char *url, *path;
1426 
1427 	if (ap->control_url == NULL) {
1428 		wpa_printf(MSG_DEBUG, "WPS ER: No controlURL for AP");
1429 		return;
1430 	}
1431 
1432 	if (ap->http) {
1433 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP request for AP - "
1434 			   "ignore new request");
1435 		return;
1436 	}
1437 
1438 	if (ap->wps) {
1439 		wpa_printf(MSG_DEBUG, "WPS ER: Pending WPS operation for AP - "
1440 			   "skip SetSelectedRegistrar");
1441 		return;
1442 	}
1443 
1444 	url = http_client_url_parse(ap->control_url, &dst, &path);
1445 	if (url == NULL) {
1446 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse controlURL");
1447 		return;
1448 	}
1449 
1450 	buf = wps_er_soap_hdr(msg, "SetSelectedRegistrar", "NewMessage", path,
1451 			      &dst, &len_ptr, &body_ptr);
1452 	os_free(url);
1453 	if (buf == NULL)
1454 		return;
1455 
1456 	wps_er_soap_end(buf, "SetSelectedRegistrar", len_ptr, body_ptr);
1457 
1458 	ap->http = http_client_addr(&dst, buf, 1000,
1459 				    wps_er_http_set_sel_reg_cb, ap);
1460 	if (ap->http == NULL)
1461 		wpabuf_free(buf);
1462 }
1463 
1464 
wps_er_build_selected_registrar(struct wpabuf * msg,int sel_reg)1465 static int wps_er_build_selected_registrar(struct wpabuf *msg, int sel_reg)
1466 {
1467 	wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
1468 	wpabuf_put_be16(msg, 1);
1469 	wpabuf_put_u8(msg, !!sel_reg);
1470 	return 0;
1471 }
1472 
1473 
wps_er_build_dev_password_id(struct wpabuf * msg,u16 dev_passwd_id)1474 static int wps_er_build_dev_password_id(struct wpabuf *msg, u16 dev_passwd_id)
1475 {
1476 	wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
1477 	wpabuf_put_be16(msg, 2);
1478 	wpabuf_put_be16(msg, dev_passwd_id);
1479 	return 0;
1480 }
1481 
1482 
wps_er_build_sel_reg_config_methods(struct wpabuf * msg,u16 sel_reg_config_methods)1483 static int wps_er_build_sel_reg_config_methods(struct wpabuf *msg,
1484 					       u16 sel_reg_config_methods)
1485 {
1486 	wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
1487 	wpabuf_put_be16(msg, 2);
1488 	wpabuf_put_be16(msg, sel_reg_config_methods);
1489 	return 0;
1490 }
1491 
1492 
wps_er_build_uuid_r(struct wpabuf * msg,const u8 * uuid_r)1493 static int wps_er_build_uuid_r(struct wpabuf *msg, const u8 *uuid_r)
1494 {
1495 	wpabuf_put_be16(msg, ATTR_UUID_R);
1496 	wpabuf_put_be16(msg, WPS_UUID_LEN);
1497 	wpabuf_put_data(msg, uuid_r, WPS_UUID_LEN);
1498 	return 0;
1499 }
1500 
1501 
wps_er_set_sel_reg(struct wps_er * er,int sel_reg,u16 dev_passwd_id,u16 sel_reg_config_methods)1502 void wps_er_set_sel_reg(struct wps_er *er, int sel_reg, u16 dev_passwd_id,
1503 			u16 sel_reg_config_methods)
1504 {
1505 	struct wpabuf *msg;
1506 	struct wps_er_ap *ap;
1507 	struct wps_registrar *reg = er->wps->registrar;
1508 	const u8 *auth_macs;
1509 	u8 bcast[ETH_ALEN];
1510 	size_t count;
1511 	union wps_event_data data;
1512 
1513 	if (er->skip_set_sel_reg) {
1514 		wpa_printf(MSG_DEBUG, "WPS ER: Skip SetSelectedRegistrar");
1515 		return;
1516 	}
1517 
1518 	msg = wpabuf_alloc(500);
1519 	if (msg == NULL)
1520 		return;
1521 
1522 	auth_macs = wps_authorized_macs(reg, &count);
1523 	if (count == 0) {
1524 		os_memset(bcast, 0xff, ETH_ALEN);
1525 		auth_macs = bcast;
1526 		count = 1;
1527 	}
1528 
1529 	if (wps_build_version(msg) ||
1530 	    wps_er_build_selected_registrar(msg, sel_reg) ||
1531 	    wps_er_build_dev_password_id(msg, dev_passwd_id) ||
1532 	    wps_er_build_sel_reg_config_methods(msg, sel_reg_config_methods) ||
1533 	    wps_build_wfa_ext(msg, 0, auth_macs, count, 0) ||
1534 	    wps_er_build_uuid_r(msg, er->wps->uuid)) {
1535 		wpabuf_free(msg);
1536 		return;
1537 	}
1538 
1539 	os_memset(&data, 0, sizeof(data));
1540 	data.set_sel_reg.sel_reg = sel_reg;
1541 	data.set_sel_reg.dev_passwd_id = dev_passwd_id;
1542 	data.set_sel_reg.sel_reg_config_methods = sel_reg_config_methods;
1543 	data.set_sel_reg.state = WPS_ER_SET_SEL_REG_START;
1544 
1545 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
1546 		if (er->set_sel_reg_uuid_filter &&
1547 		    os_memcmp(ap->uuid, er->set_sel_reg_uuid_filter,
1548 			      WPS_UUID_LEN) != 0)
1549 			continue;
1550 		data.set_sel_reg.uuid = ap->uuid;
1551 		er->wps->event_cb(er->wps->cb_ctx,
1552 				  WPS_EV_ER_SET_SELECTED_REGISTRAR, &data);
1553 		wps_er_send_set_sel_reg(ap, msg);
1554 	}
1555 
1556 	wpabuf_free(msg);
1557 }
1558 
1559 
wps_er_pbc(struct wps_er * er,const u8 * uuid,const u8 * addr)1560 int wps_er_pbc(struct wps_er *er, const u8 *uuid, const u8 *addr)
1561 {
1562 	int res;
1563 	struct wps_er_ap *ap;
1564 
1565 	if (er == NULL || er->wps == NULL)
1566 		return -1;
1567 
1568 	if (wps_registrar_pbc_overlap(er->wps->registrar, NULL, NULL)) {
1569 		wpa_printf(MSG_DEBUG, "WPS ER: PBC overlap - do not start PBC "
1570 			   "mode");
1571 		return -2;
1572 	}
1573 
1574 	if (uuid)
1575 		ap = wps_er_ap_get(er, NULL, uuid, NULL);
1576 	else
1577 		ap = NULL;
1578 	if (ap == NULL) {
1579 		struct wps_er_sta *sta = NULL;
1580 		dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
1581 			sta = wps_er_sta_get(ap, addr, uuid);
1582 			if (sta) {
1583 				uuid = ap->uuid;
1584 				break;
1585 			}
1586 		}
1587 		if (sta == NULL)
1588 			return -3; /* Unknown UUID */
1589 	}
1590 
1591 	if (ap->ap_settings == NULL) {
1592 		wpa_printf(MSG_DEBUG, "WPS ER: AP settings not known");
1593 		return -4;
1594 	}
1595 
1596 	er->set_sel_reg_uuid_filter = uuid;
1597 	res = wps_registrar_button_pushed(er->wps->registrar, NULL);
1598 	er->set_sel_reg_uuid_filter = NULL;
1599 	if (res)
1600 		return -1;
1601 
1602 	return 0;
1603 }
1604 
1605 
wps_er_ap_settings_cb(void * ctx,const struct wps_credential * cred)1606 static void wps_er_ap_settings_cb(void *ctx, const struct wps_credential *cred)
1607 {
1608 	struct wps_er_ap *ap = ctx;
1609 	union wps_event_data data;
1610 
1611 	wpa_printf(MSG_DEBUG, "WPS ER: AP Settings received");
1612 	os_free(ap->ap_settings);
1613 	ap->ap_settings = os_malloc(sizeof(*cred));
1614 	if (ap->ap_settings) {
1615 		os_memcpy(ap->ap_settings, cred, sizeof(*cred));
1616 		ap->ap_settings->cred_attr = NULL;
1617 	}
1618 
1619 	os_memset(&data, 0, sizeof(data));
1620 	data.ap_settings.uuid = ap->uuid;
1621 	data.ap_settings.cred = cred;
1622 	ap->er->wps->event_cb(ap->er->wps->cb_ctx, WPS_EV_ER_AP_SETTINGS,
1623 			      &data);
1624 }
1625 
1626 
wps_er_get_sta_uuid(struct wps_er * er,const u8 * addr)1627 const u8 * wps_er_get_sta_uuid(struct wps_er *er, const u8 *addr)
1628 {
1629 	struct wps_er_ap *ap;
1630 	dl_list_for_each(ap, &er->ap, struct wps_er_ap, list) {
1631 		struct wps_er_sta *sta;
1632 		sta = wps_er_sta_get(ap, addr, NULL);
1633 		if (sta)
1634 			return sta->uuid;
1635 	}
1636 	return NULL;
1637 }
1638 
1639 
wps_er_http_put_message_cb(void * ctx,struct http_client * c,enum http_client_event event)1640 static void wps_er_http_put_message_cb(void *ctx, struct http_client *c,
1641 				       enum http_client_event event)
1642 {
1643 	struct wps_er_ap *ap = ctx;
1644 	struct wpabuf *reply;
1645 	char *msg = NULL;
1646 
1647 	switch (event) {
1648 	case HTTP_CLIENT_OK:
1649 		wpa_printf(MSG_DEBUG, "WPS ER: PutMessage OK");
1650 		reply = http_client_get_body(c);
1651 		if (reply)
1652 			msg = os_zalloc(wpabuf_len(reply) + 1);
1653 		if (msg == NULL) {
1654 			if (ap->wps) {
1655 				wps_deinit(ap->wps);
1656 				ap->wps = NULL;
1657 			}
1658 			break;
1659 		}
1660 		os_memcpy(msg, wpabuf_head(reply), wpabuf_len(reply));
1661 		break;
1662 	case HTTP_CLIENT_FAILED:
1663 	case HTTP_CLIENT_INVALID_REPLY:
1664 	case HTTP_CLIENT_TIMEOUT:
1665 		wpa_printf(MSG_DEBUG, "WPS ER: PutMessage failed");
1666 		if (ap->wps) {
1667 			wps_deinit(ap->wps);
1668 			ap->wps = NULL;
1669 		}
1670 		break;
1671 	}
1672 	http_client_free(ap->http);
1673 	ap->http = NULL;
1674 
1675 	if (msg) {
1676 		struct wpabuf *buf;
1677 		enum http_reply_code ret;
1678 		buf = xml_get_base64_item(msg, "NewOutMessage", &ret);
1679 		os_free(msg);
1680 		if (buf == NULL) {
1681 			wpa_printf(MSG_DEBUG, "WPS ER: Could not extract "
1682 				   "NewOutMessage from PutMessage response");
1683 			wps_deinit(ap->wps);
1684 			ap->wps = NULL;
1685 			return;
1686 		}
1687 		wps_er_ap_process(ap, buf);
1688 		wpabuf_free(buf);
1689 	}
1690 }
1691 
1692 
wps_er_ap_put_message(struct wps_er_ap * ap,const struct wpabuf * msg)1693 static void wps_er_ap_put_message(struct wps_er_ap *ap,
1694 				  const struct wpabuf *msg)
1695 {
1696 	struct wpabuf *buf;
1697 	char *len_ptr, *body_ptr;
1698 	struct sockaddr_in dst;
1699 	char *url, *path;
1700 
1701 	if (ap->http) {
1702 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP operation ongoing "
1703 			   "with the AP - cannot continue learn");
1704 		return;
1705 	}
1706 
1707 	if (ap->control_url == NULL) {
1708 		wpa_printf(MSG_DEBUG, "WPS ER: No controlURL for AP");
1709 		return;
1710 	}
1711 
1712 	url = http_client_url_parse(ap->control_url, &dst, &path);
1713 	if (url == NULL) {
1714 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse controlURL");
1715 		goto fail;
1716 	}
1717 
1718 	buf = wps_er_soap_hdr(msg, "PutMessage", "NewInMessage", path, &dst,
1719 			      &len_ptr, &body_ptr);
1720 	os_free(url);
1721 	if (buf == NULL)
1722 		goto fail;
1723 
1724 	wps_er_soap_end(buf, "PutMessage", len_ptr, body_ptr);
1725 
1726 	ap->http = http_client_addr(&dst, buf, 10000,
1727 				    wps_er_http_put_message_cb, ap);
1728 	if (ap->http == NULL) {
1729 		wpabuf_free(buf);
1730 		goto fail;
1731 	}
1732 	return;
1733 
1734 fail:
1735 	if (ap->wps) {
1736 		wps_deinit(ap->wps);
1737 		ap->wps = NULL;
1738 	}
1739 }
1740 
1741 
wps_er_ap_process(struct wps_er_ap * ap,struct wpabuf * msg)1742 static void wps_er_ap_process(struct wps_er_ap *ap, struct wpabuf *msg)
1743 {
1744 	enum wps_process_res res;
1745 	struct wps_parse_attr attr;
1746 	enum wsc_op_code op_code;
1747 
1748 	op_code = WSC_MSG;
1749 	if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type) {
1750 		switch (*attr.msg_type) {
1751 		case WPS_WSC_ACK:
1752 			op_code = WSC_ACK;
1753 			break;
1754 		case WPS_WSC_NACK:
1755 			op_code = WSC_NACK;
1756 			break;
1757 		case WPS_WSC_DONE:
1758 			op_code = WSC_Done;
1759 			break;
1760 		}
1761 	}
1762 
1763 	res = wps_process_msg(ap->wps, op_code, msg);
1764 	if (res == WPS_CONTINUE) {
1765 		struct wpabuf *next = wps_get_msg(ap->wps, &op_code);
1766 		if (next) {
1767 			wps_er_ap_put_message(ap, next);
1768 			wpabuf_free(next);
1769 		} else {
1770 			wpa_printf(MSG_DEBUG, "WPS ER: Failed to build "
1771 				   "message");
1772 			wps_deinit(ap->wps);
1773 			ap->wps = NULL;
1774 		}
1775 	} else if (res == WPS_DONE) {
1776 		wpa_printf(MSG_DEBUG, "WPS ER: Protocol run done");
1777 		wps_deinit(ap->wps);
1778 		ap->wps = NULL;
1779 	} else {
1780 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to process message from "
1781 			   "AP (res=%d)", res);
1782 		wps_deinit(ap->wps);
1783 		ap->wps = NULL;
1784 	}
1785 }
1786 
1787 
wps_er_ap_learn_m1(struct wps_er_ap * ap,struct wpabuf * m1)1788 static void wps_er_ap_learn_m1(struct wps_er_ap *ap, struct wpabuf *m1)
1789 {
1790 	struct wps_config cfg;
1791 
1792 	if (ap->wps) {
1793 		wpa_printf(MSG_DEBUG, "WPS ER: Protocol run already in "
1794 			   "progress with this AP");
1795 		return;
1796 	}
1797 
1798 	os_memset(&cfg, 0, sizeof(cfg));
1799 	cfg.wps = ap->er->wps;
1800 	cfg.registrar = 1;
1801 	ap->wps = wps_init(&cfg);
1802 	if (ap->wps == NULL)
1803 		return;
1804 	ap->wps->ap_settings_cb = wps_er_ap_settings_cb;
1805 	ap->wps->ap_settings_cb_ctx = ap;
1806 
1807 	wps_er_ap_process(ap, m1);
1808 }
1809 
1810 
wps_er_ap_learn(struct wps_er_ap * ap,const char * dev_info)1811 static void wps_er_ap_learn(struct wps_er_ap *ap, const char *dev_info)
1812 {
1813 	struct wpabuf *info;
1814 	enum http_reply_code ret;
1815 
1816 	wpa_printf(MSG_DEBUG, "WPS ER: Received GetDeviceInfo response (M1) "
1817 		   "from the AP");
1818 	info = xml_get_base64_item(dev_info, "NewDeviceInfo", &ret);
1819 	if (info == NULL) {
1820 		wpa_printf(MSG_DEBUG, "WPS ER: Could not extract "
1821 			   "NewDeviceInfo from GetDeviceInfo response");
1822 		return;
1823 	}
1824 
1825 	ap->m1_handler(ap, info);
1826 	wpabuf_free(info);
1827 }
1828 
1829 
wps_er_http_get_dev_info_cb(void * ctx,struct http_client * c,enum http_client_event event)1830 static void wps_er_http_get_dev_info_cb(void *ctx, struct http_client *c,
1831 					enum http_client_event event)
1832 {
1833 	struct wps_er_ap *ap = ctx;
1834 	struct wpabuf *reply;
1835 	char *dev_info = NULL;
1836 
1837 	switch (event) {
1838 	case HTTP_CLIENT_OK:
1839 		wpa_printf(MSG_DEBUG, "WPS ER: GetDeviceInfo OK");
1840 		reply = http_client_get_body(c);
1841 		if (reply == NULL)
1842 			break;
1843 		dev_info = os_zalloc(wpabuf_len(reply) + 1);
1844 		if (dev_info == NULL)
1845 			break;
1846 		os_memcpy(dev_info, wpabuf_head(reply), wpabuf_len(reply));
1847 		break;
1848 	case HTTP_CLIENT_FAILED:
1849 	case HTTP_CLIENT_INVALID_REPLY:
1850 	case HTTP_CLIENT_TIMEOUT:
1851 		wpa_printf(MSG_DEBUG, "WPS ER: GetDeviceInfo failed");
1852 		break;
1853 	}
1854 	http_client_free(ap->http);
1855 	ap->http = NULL;
1856 
1857 	if (dev_info) {
1858 		wps_er_ap_learn(ap, dev_info);
1859 		os_free(dev_info);
1860 	}
1861 }
1862 
1863 
wps_er_send_get_device_info(struct wps_er_ap * ap,void (* m1_handler)(struct wps_er_ap * ap,struct wpabuf * m1))1864 static int wps_er_send_get_device_info(struct wps_er_ap *ap,
1865 				       void (*m1_handler)(struct wps_er_ap *ap,
1866 							  struct wpabuf *m1))
1867 {
1868 	struct wpabuf *buf;
1869 	char *len_ptr, *body_ptr;
1870 	struct sockaddr_in dst;
1871 	char *url, *path;
1872 
1873 	if (ap->http) {
1874 		wpa_printf(MSG_DEBUG, "WPS ER: Pending HTTP operation ongoing "
1875 			   "with the AP - cannot get device info");
1876 		return -1;
1877 	}
1878 
1879 	if (ap->control_url == NULL) {
1880 		wpa_printf(MSG_DEBUG, "WPS ER: No controlURL for AP");
1881 		return -1;
1882 	}
1883 
1884 	url = http_client_url_parse(ap->control_url, &dst, &path);
1885 	if (url == NULL) {
1886 		wpa_printf(MSG_DEBUG, "WPS ER: Failed to parse controlURL");
1887 		return -1;
1888 	}
1889 
1890 	buf = wps_er_soap_hdr(NULL, "GetDeviceInfo", NULL, path, &dst,
1891 			      &len_ptr, &body_ptr);
1892 	os_free(url);
1893 	if (buf == NULL)
1894 		return -1;
1895 
1896 	wps_er_soap_end(buf, "GetDeviceInfo", len_ptr, body_ptr);
1897 
1898 	ap->http = http_client_addr(&dst, buf, 10000,
1899 				    wps_er_http_get_dev_info_cb, ap);
1900 	if (ap->http == NULL) {
1901 		wpabuf_free(buf);
1902 		return -1;
1903 	}
1904 
1905 	ap->m1_handler = m1_handler;
1906 
1907 	return 0;
1908 }
1909 
1910 
wps_er_learn(struct wps_er * er,const u8 * uuid,const u8 * addr,const u8 * pin,size_t pin_len)1911 int wps_er_learn(struct wps_er *er, const u8 *uuid, const u8 *addr,
1912 		 const u8 *pin, size_t pin_len)
1913 {
1914 	struct wps_er_ap *ap;
1915 
1916 	if (er == NULL)
1917 		return -1;
1918 
1919 	ap = wps_er_ap_get(er, NULL, uuid, addr);
1920 	if (ap == NULL) {
1921 		wpa_printf(MSG_DEBUG, "WPS ER: AP not found for learn "
1922 			   "request");
1923 		return -1;
1924 	}
1925 	if (uuid == NULL)
1926 		uuid = ap->uuid;
1927 	if (ap->wps) {
1928 		wpa_printf(MSG_DEBUG, "WPS ER: Pending operation ongoing "
1929 			   "with the AP - cannot start learn");
1930 		return -1;
1931 	}
1932 
1933 	if (wps_er_send_get_device_info(ap, wps_er_ap_learn_m1) < 0)
1934 		return -1;
1935 
1936 	er->skip_set_sel_reg = 1;
1937 	wps_registrar_add_pin(er->wps->registrar, NULL, uuid, pin, pin_len, 0);
1938 	er->skip_set_sel_reg = 0;
1939 
1940 	return 0;
1941 }
1942 
1943 
wps_er_set_config(struct wps_er * er,const u8 * uuid,const u8 * addr,const struct wps_credential * cred)1944 int wps_er_set_config(struct wps_er *er, const u8 *uuid, const u8 *addr,
1945 		      const struct wps_credential *cred)
1946 {
1947 	struct wps_er_ap *ap;
1948 
1949 	if (er == NULL)
1950 		return -1;
1951 
1952 	ap = wps_er_ap_get(er, NULL, uuid, addr);
1953 	if (ap == NULL) {
1954 		wpa_printf(MSG_DEBUG, "WPS ER: AP not found for set config "
1955 			   "request");
1956 		return -1;
1957 	}
1958 
1959 	os_free(ap->ap_settings);
1960 	ap->ap_settings = os_memdup(cred, sizeof(*cred));
1961 	if (ap->ap_settings == NULL)
1962 		return -1;
1963 	ap->ap_settings->cred_attr = NULL;
1964 	wpa_printf(MSG_DEBUG, "WPS ER: Updated local AP settings based set "
1965 		   "config request");
1966 
1967 	return 0;
1968 }
1969 
1970 
wps_er_ap_config_m1(struct wps_er_ap * ap,struct wpabuf * m1)1971 static void wps_er_ap_config_m1(struct wps_er_ap *ap, struct wpabuf *m1)
1972 {
1973 	struct wps_config cfg;
1974 
1975 	if (ap->wps) {
1976 		wpa_printf(MSG_DEBUG, "WPS ER: Protocol run already in "
1977 			   "progress with this AP");
1978 		return;
1979 	}
1980 
1981 	os_memset(&cfg, 0, sizeof(cfg));
1982 	cfg.wps = ap->er->wps;
1983 	cfg.registrar = 1;
1984 	cfg.new_ap_settings = ap->ap_settings;
1985 	ap->wps = wps_init(&cfg);
1986 	if (ap->wps == NULL)
1987 		return;
1988 	ap->wps->ap_settings_cb = NULL;
1989 	ap->wps->ap_settings_cb_ctx = NULL;
1990 
1991 	wps_er_ap_process(ap, m1);
1992 }
1993 
1994 
wps_er_config(struct wps_er * er,const u8 * uuid,const u8 * addr,const u8 * pin,size_t pin_len,const struct wps_credential * cred)1995 int wps_er_config(struct wps_er *er, const u8 *uuid, const u8 *addr,
1996 		  const u8 *pin, size_t pin_len,
1997 		  const struct wps_credential *cred)
1998 {
1999 	struct wps_er_ap *ap;
2000 
2001 	if (er == NULL)
2002 		return -1;
2003 
2004 	ap = wps_er_ap_get(er, NULL, uuid, addr);
2005 	if (ap == NULL) {
2006 		wpa_printf(MSG_DEBUG, "WPS ER: AP not found for config "
2007 			   "request");
2008 		return -1;
2009 	}
2010 	if (uuid == NULL)
2011 		uuid = ap->uuid;
2012 	if (ap->wps) {
2013 		wpa_printf(MSG_DEBUG, "WPS ER: Pending operation ongoing "
2014 			   "with the AP - cannot start config");
2015 		return -1;
2016 	}
2017 
2018 	os_free(ap->ap_settings);
2019 	ap->ap_settings = os_memdup(cred, sizeof(*cred));
2020 	if (ap->ap_settings == NULL)
2021 		return -1;
2022 	ap->ap_settings->cred_attr = NULL;
2023 
2024 	if (wps_er_send_get_device_info(ap, wps_er_ap_config_m1) < 0)
2025 		return -1;
2026 
2027 	er->skip_set_sel_reg = 1;
2028 	wps_registrar_add_pin(er->wps->registrar, NULL, uuid, pin, pin_len, 0);
2029 	er->skip_set_sel_reg = 0;
2030 
2031 	return 0;
2032 }
2033 
2034 
2035 #ifdef CONFIG_WPS_NFC
2036 
wps_er_config_token_from_cred(struct wps_context * wps,struct wps_credential * cred)2037 struct wpabuf * wps_er_config_token_from_cred(struct wps_context *wps,
2038 					      struct wps_credential *cred)
2039 {
2040 	struct wpabuf *ret;
2041 	struct wps_data data;
2042 
2043 	ret = wpabuf_alloc(500);
2044 	if (ret == NULL)
2045 		return NULL;
2046 
2047 	os_memset(&data, 0, sizeof(data));
2048 	data.wps = wps;
2049 	data.use_cred = cred;
2050 	if (wps_build_cred(&data, ret) ||
2051 	    wps_build_wfa_ext(ret, 0, NULL, 0, 0)) {
2052 		wpabuf_free(ret);
2053 		return NULL;
2054 	}
2055 
2056 	return ret;
2057 }
2058 
2059 
wps_er_nfc_config_token(struct wps_er * er,const u8 * uuid,const u8 * addr)2060 struct wpabuf * wps_er_nfc_config_token(struct wps_er *er, const u8 *uuid,
2061 					const u8 *addr)
2062 {
2063 	struct wps_er_ap *ap;
2064 
2065 	if (er == NULL)
2066 		return NULL;
2067 
2068 	ap = wps_er_ap_get(er, NULL, uuid, addr);
2069 	if (ap == NULL)
2070 		return NULL;
2071 	if (ap->ap_settings == NULL) {
2072 		wpa_printf(MSG_DEBUG, "WPS ER: No settings known for the "
2073 			   "selected AP");
2074 		return NULL;
2075 	}
2076 
2077 	return wps_er_config_token_from_cred(er->wps, ap->ap_settings);
2078 }
2079 
2080 
wps_er_nfc_handover_sel(struct wps_er * er,struct wps_context * wps,const u8 * uuid,const u8 * addr,struct wpabuf * pubkey)2081 struct wpabuf * wps_er_nfc_handover_sel(struct wps_er *er,
2082 					struct wps_context *wps, const u8 *uuid,
2083 					const u8 *addr, struct wpabuf *pubkey)
2084 {
2085 	struct wps_er_ap *ap;
2086 
2087 	if (er == NULL)
2088 		return NULL;
2089 
2090 	ap = wps_er_ap_get(er, NULL, uuid, addr);
2091 	if (ap == NULL)
2092 		return NULL;
2093 	if (ap->ap_settings == NULL) {
2094 		wpa_printf(MSG_DEBUG, "WPS ER: No settings known for the "
2095 			   "selected AP");
2096 		return NULL;
2097 	}
2098 
2099 	os_memcpy(wps->ssid, ap->ap_settings->ssid, ap->ap_settings->ssid_len);
2100 	wps->ssid_len = ap->ap_settings->ssid_len;
2101 
2102 	return wps_build_nfc_handover_sel(wps, pubkey, addr, 0);
2103 }
2104 
2105 #endif /* CONFIG_WPS_NFC */
2106