ctrl_iface.c revision 04949598a23f501be6eec21697465fd46a28840a 
1/*
2 * hostapd / UNIX domain socket -based control interface
3 * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "utils/includes.h"
10
11#ifndef CONFIG_NATIVE_WINDOWS
12
13#include <sys/un.h>
14#include <sys/stat.h>
15#include <stddef.h>
16
17#include "utils/common.h"
18#include "utils/eloop.h"
19#include "common/version.h"
20#include "common/ieee802_11_defs.h"
21#include "drivers/driver.h"
22#include "radius/radius_client.h"
23#include "ap/hostapd.h"
24#include "ap/ap_config.h"
25#include "ap/ieee802_1x.h"
26#include "ap/wpa_auth.h"
27#include "ap/ieee802_11.h"
28#include "ap/sta_info.h"
29#include "ap/wps_hostapd.h"
30#include "ap/ctrl_iface_ap.h"
31#include "ap/ap_drv_ops.h"
32#include "wps/wps_defs.h"
33#include "wps/wps.h"
34#include "config_file.h"
35#include "ctrl_iface.h"
36
37
38struct wpa_ctrl_dst {
39	struct wpa_ctrl_dst *next;
40	struct sockaddr_un addr;
41	socklen_t addrlen;
42	int debug_level;
43	int errors;
44};
45
46
47static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
48				    const char *buf, size_t len);
49
50
51static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
52				     struct sockaddr_un *from,
53				     socklen_t fromlen)
54{
55	struct wpa_ctrl_dst *dst;
56
57	dst = os_zalloc(sizeof(*dst));
58	if (dst == NULL)
59		return -1;
60	os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
61	dst->addrlen = fromlen;
62	dst->debug_level = MSG_INFO;
63	dst->next = hapd->ctrl_dst;
64	hapd->ctrl_dst = dst;
65	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
66		    (u8 *) from->sun_path,
67		    fromlen - offsetof(struct sockaddr_un, sun_path));
68	return 0;
69}
70
71
72static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
73				     struct sockaddr_un *from,
74				     socklen_t fromlen)
75{
76	struct wpa_ctrl_dst *dst, *prev = NULL;
77
78	dst = hapd->ctrl_dst;
79	while (dst) {
80		if (fromlen == dst->addrlen &&
81		    os_memcmp(from->sun_path, dst->addr.sun_path,
82			      fromlen - offsetof(struct sockaddr_un, sun_path))
83		    == 0) {
84			if (prev == NULL)
85				hapd->ctrl_dst = dst->next;
86			else
87				prev->next = dst->next;
88			os_free(dst);
89			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
90				    (u8 *) from->sun_path,
91				    fromlen -
92				    offsetof(struct sockaddr_un, sun_path));
93			return 0;
94		}
95		prev = dst;
96		dst = dst->next;
97	}
98	return -1;
99}
100
101
102static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
103				    struct sockaddr_un *from,
104				    socklen_t fromlen,
105				    char *level)
106{
107	struct wpa_ctrl_dst *dst;
108
109	wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
110
111	dst = hapd->ctrl_dst;
112	while (dst) {
113		if (fromlen == dst->addrlen &&
114		    os_memcmp(from->sun_path, dst->addr.sun_path,
115			      fromlen - offsetof(struct sockaddr_un, sun_path))
116		    == 0) {
117			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
118				    "level", (u8 *) from->sun_path, fromlen -
119				    offsetof(struct sockaddr_un, sun_path));
120			dst->debug_level = atoi(level);
121			return 0;
122		}
123		dst = dst->next;
124	}
125
126	return -1;
127}
128
129
130static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
131				      const char *txtaddr)
132{
133	u8 addr[ETH_ALEN];
134	struct sta_info *sta;
135
136	wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
137
138	if (hwaddr_aton(txtaddr, addr))
139		return -1;
140
141	sta = ap_get_sta(hapd, addr);
142	if (sta)
143		return 0;
144
145	wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
146		   "notification", MAC2STR(addr));
147	sta = ap_sta_add(hapd, addr);
148	if (sta == NULL)
149		return -1;
150
151	hostapd_new_assoc_sta(hapd, sta, 0);
152	return 0;
153}
154
155
156#ifdef CONFIG_IEEE80211W
157#ifdef NEED_AP_MLME
158static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
159				       const char *txtaddr)
160{
161	u8 addr[ETH_ALEN];
162	u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
163
164	wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
165
166	if (hwaddr_aton(txtaddr, addr) ||
167	    os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0)
168		return -1;
169
170	ieee802_11_send_sa_query_req(hapd, addr, trans_id);
171
172	return 0;
173}
174#endif /* NEED_AP_MLME */
175#endif /* CONFIG_IEEE80211W */
176
177
178#ifdef CONFIG_WPS
179static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
180{
181	char *pin = os_strchr(txt, ' ');
182	char *timeout_txt;
183	int timeout;
184	u8 addr_buf[ETH_ALEN], *addr = NULL;
185	char *pos;
186
187	if (pin == NULL)
188		return -1;
189	*pin++ = '\0';
190
191	timeout_txt = os_strchr(pin, ' ');
192	if (timeout_txt) {
193		*timeout_txt++ = '\0';
194		timeout = atoi(timeout_txt);
195		pos = os_strchr(timeout_txt, ' ');
196		if (pos) {
197			*pos++ = '\0';
198			if (hwaddr_aton(pos, addr_buf) == 0)
199				addr = addr_buf;
200		}
201	} else
202		timeout = 0;
203
204	return hostapd_wps_add_pin(hapd, addr, txt, pin, timeout);
205}
206
207
208static int hostapd_ctrl_iface_wps_check_pin(
209	struct hostapd_data *hapd, char *cmd, char *buf, size_t buflen)
210{
211	char pin[9];
212	size_t len;
213	char *pos;
214	int ret;
215
216	wpa_hexdump_ascii_key(MSG_DEBUG, "WPS_CHECK_PIN",
217			      (u8 *) cmd, os_strlen(cmd));
218	for (pos = cmd, len = 0; *pos != '\0'; pos++) {
219		if (*pos < '0' || *pos > '9')
220			continue;
221		pin[len++] = *pos;
222		if (len == 9) {
223			wpa_printf(MSG_DEBUG, "WPS: Too long PIN");
224			return -1;
225		}
226	}
227	if (len != 4 && len != 8) {
228		wpa_printf(MSG_DEBUG, "WPS: Invalid PIN length %d", (int) len);
229		return -1;
230	}
231	pin[len] = '\0';
232
233	if (len == 8) {
234		unsigned int pin_val;
235		pin_val = atoi(pin);
236		if (!wps_pin_valid(pin_val)) {
237			wpa_printf(MSG_DEBUG, "WPS: Invalid checksum digit");
238			ret = os_snprintf(buf, buflen, "FAIL-CHECKSUM\n");
239			if (ret < 0 || (size_t) ret >= buflen)
240				return -1;
241			return ret;
242		}
243	}
244
245	ret = os_snprintf(buf, buflen, "%s", pin);
246	if (ret < 0 || (size_t) ret >= buflen)
247		return -1;
248
249	return ret;
250}
251
252
253#ifdef CONFIG_WPS_OOB
254static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
255{
256	char *path, *method, *name;
257
258	path = os_strchr(txt, ' ');
259	if (path == NULL)
260		return -1;
261	*path++ = '\0';
262
263	method = os_strchr(path, ' ');
264	if (method == NULL)
265		return -1;
266	*method++ = '\0';
267
268	name = os_strchr(method, ' ');
269	if (name != NULL)
270		*name++ = '\0';
271
272	return hostapd_wps_start_oob(hapd, txt, path, method, name);
273}
274#endif /* CONFIG_WPS_OOB */
275
276
277#ifdef CONFIG_WPS_NFC
278static int hostapd_ctrl_iface_wps_nfc_tag_read(struct hostapd_data *hapd,
279					       char *pos)
280{
281	size_t len;
282	struct wpabuf *buf;
283	int ret;
284
285	len = os_strlen(pos);
286	if (len & 0x01)
287		return -1;
288	len /= 2;
289
290	buf = wpabuf_alloc(len);
291	if (buf == NULL)
292		return -1;
293	if (hexstr2bin(pos, wpabuf_put(buf, len), len) < 0) {
294		wpabuf_free(buf);
295		return -1;
296	}
297
298	ret = hostapd_wps_nfc_tag_read(hapd, buf);
299	wpabuf_free(buf);
300
301	return ret;
302}
303
304
305static int hostapd_ctrl_iface_wps_nfc_config_token(struct hostapd_data *hapd,
306						   char *cmd, char *reply,
307						   size_t max_len)
308{
309	int ndef;
310	struct wpabuf *buf;
311	int res;
312
313	if (os_strcmp(cmd, "WPS") == 0)
314		ndef = 0;
315	else if (os_strcmp(cmd, "NDEF") == 0)
316		ndef = 1;
317	else
318		return -1;
319
320	buf = hostapd_wps_nfc_config_token(hapd, ndef);
321	if (buf == NULL)
322		return -1;
323
324	res = wpa_snprintf_hex_uppercase(reply, max_len, wpabuf_head(buf),
325					 wpabuf_len(buf));
326	reply[res++] = '\n';
327	reply[res] = '\0';
328
329	wpabuf_free(buf);
330
331	return res;
332}
333
334
335static int hostapd_ctrl_iface_wps_nfc_token_gen(struct hostapd_data *hapd,
336						char *reply, size_t max_len,
337						int ndef)
338{
339	struct wpabuf *buf;
340	int res;
341
342	buf = hostapd_wps_nfc_token_gen(hapd, ndef);
343	if (buf == NULL)
344		return -1;
345
346	res = wpa_snprintf_hex_uppercase(reply, max_len, wpabuf_head(buf),
347					 wpabuf_len(buf));
348	reply[res++] = '\n';
349	reply[res] = '\0';
350
351	wpabuf_free(buf);
352
353	return res;
354}
355
356
357static int hostapd_ctrl_iface_wps_nfc_token(struct hostapd_data *hapd,
358					    char *cmd, char *reply,
359					    size_t max_len)
360{
361	if (os_strcmp(cmd, "WPS") == 0)
362		return hostapd_ctrl_iface_wps_nfc_token_gen(hapd, reply,
363							    max_len, 0);
364
365	if (os_strcmp(cmd, "NDEF") == 0)
366		return hostapd_ctrl_iface_wps_nfc_token_gen(hapd, reply,
367							    max_len, 1);
368
369	if (os_strcmp(cmd, "enable") == 0)
370		return hostapd_wps_nfc_token_enable(hapd);
371
372	if (os_strcmp(cmd, "disable") == 0) {
373		hostapd_wps_nfc_token_disable(hapd);
374		return 0;
375	}
376
377	return -1;
378}
379#endif /* CONFIG_WPS_NFC */
380
381
382static int hostapd_ctrl_iface_wps_ap_pin(struct hostapd_data *hapd, char *txt,
383					 char *buf, size_t buflen)
384{
385	int timeout = 300;
386	char *pos;
387	const char *pin_txt;
388
389	pos = os_strchr(txt, ' ');
390	if (pos)
391		*pos++ = '\0';
392
393	if (os_strcmp(txt, "disable") == 0) {
394		hostapd_wps_ap_pin_disable(hapd);
395		return os_snprintf(buf, buflen, "OK\n");
396	}
397
398	if (os_strcmp(txt, "random") == 0) {
399		if (pos)
400			timeout = atoi(pos);
401		pin_txt = hostapd_wps_ap_pin_random(hapd, timeout);
402		if (pin_txt == NULL)
403			return -1;
404		return os_snprintf(buf, buflen, "%s", pin_txt);
405	}
406
407	if (os_strcmp(txt, "get") == 0) {
408		pin_txt = hostapd_wps_ap_pin_get(hapd);
409		if (pin_txt == NULL)
410			return -1;
411		return os_snprintf(buf, buflen, "%s", pin_txt);
412	}
413
414	if (os_strcmp(txt, "set") == 0) {
415		char *pin;
416		if (pos == NULL)
417			return -1;
418		pin = pos;
419		pos = os_strchr(pos, ' ');
420		if (pos) {
421			*pos++ = '\0';
422			timeout = atoi(pos);
423		}
424		if (os_strlen(pin) > buflen)
425			return -1;
426		if (hostapd_wps_ap_pin_set(hapd, pin, timeout) < 0)
427			return -1;
428		return os_snprintf(buf, buflen, "%s", pin);
429	}
430
431	return -1;
432}
433
434
435static int hostapd_ctrl_iface_wps_config(struct hostapd_data *hapd, char *txt)
436{
437	char *pos;
438	char *ssid, *auth, *encr = NULL, *key = NULL;
439
440	ssid = txt;
441	pos = os_strchr(txt, ' ');
442	if (!pos)
443		return -1;
444	*pos++ = '\0';
445
446	auth = pos;
447	pos = os_strchr(pos, ' ');
448	if (pos) {
449		*pos++ = '\0';
450		encr = pos;
451		pos = os_strchr(pos, ' ');
452		if (pos) {
453			*pos++ = '\0';
454			key = pos;
455		}
456	}
457
458	return hostapd_wps_config_ap(hapd, ssid, auth, encr, key);
459}
460#endif /* CONFIG_WPS */
461
462
463static int hostapd_ctrl_iface_ess_disassoc(struct hostapd_data *hapd,
464					   const char *cmd)
465{
466	u8 addr[ETH_ALEN];
467	const char *url;
468	u8 buf[1000], *pos;
469	struct ieee80211_mgmt *mgmt;
470	size_t url_len;
471
472	if (hwaddr_aton(cmd, addr))
473		return -1;
474	url = cmd + 17;
475	if (*url != ' ')
476		return -1;
477	url++;
478	url_len = os_strlen(url);
479	if (url_len > 255)
480		return -1;
481
482	os_memset(buf, 0, sizeof(buf));
483	mgmt = (struct ieee80211_mgmt *) buf;
484	mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
485					   WLAN_FC_STYPE_ACTION);
486	os_memcpy(mgmt->da, addr, ETH_ALEN);
487	os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
488	os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
489	mgmt->u.action.category = WLAN_ACTION_WNM;
490	mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
491	mgmt->u.action.u.bss_tm_req.dialog_token = 1;
492	mgmt->u.action.u.bss_tm_req.req_mode =
493		WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT;
494	mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0);
495	mgmt->u.action.u.bss_tm_req.validity_interval = 0;
496
497	pos = mgmt->u.action.u.bss_tm_req.variable;
498
499	/* Session Information URL */
500	*pos++ = url_len;
501	os_memcpy(pos, url, url_len);
502	pos += url_len;
503
504	if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
505		wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
506			   "Management Request frame");
507		return -1;
508	}
509
510	return 0;
511}
512
513
514static int hostapd_ctrl_iface_get_config(struct hostapd_data *hapd,
515					 char *buf, size_t buflen)
516{
517	int ret;
518	char *pos, *end;
519
520	pos = buf;
521	end = buf + buflen;
522
523	ret = os_snprintf(pos, end - pos, "bssid=" MACSTR "\n"
524			  "ssid=%s\n",
525			  MAC2STR(hapd->own_addr),
526			  hapd->conf->ssid.ssid);
527	if (ret < 0 || ret >= end - pos)
528		return pos - buf;
529	pos += ret;
530
531#ifdef CONFIG_WPS
532	ret = os_snprintf(pos, end - pos, "wps_state=%s\n",
533			  hapd->conf->wps_state == 0 ? "disabled" :
534			  (hapd->conf->wps_state == 1 ? "not configured" :
535			   "configured"));
536	if (ret < 0 || ret >= end - pos)
537		return pos - buf;
538	pos += ret;
539
540	if (hapd->conf->wps_state && hapd->conf->wpa &&
541	    hapd->conf->ssid.wpa_passphrase) {
542		ret = os_snprintf(pos, end - pos, "passphrase=%s\n",
543				  hapd->conf->ssid.wpa_passphrase);
544		if (ret < 0 || ret >= end - pos)
545			return pos - buf;
546		pos += ret;
547	}
548
549	if (hapd->conf->wps_state && hapd->conf->wpa &&
550	    hapd->conf->ssid.wpa_psk &&
551	    hapd->conf->ssid.wpa_psk->group) {
552		char hex[PMK_LEN * 2 + 1];
553		wpa_snprintf_hex(hex, sizeof(hex),
554				 hapd->conf->ssid.wpa_psk->psk, PMK_LEN);
555		ret = os_snprintf(pos, end - pos, "psk=%s\n", hex);
556		if (ret < 0 || ret >= end - pos)
557			return pos - buf;
558		pos += ret;
559	}
560#endif /* CONFIG_WPS */
561
562	if (hapd->conf->wpa && hapd->conf->wpa_key_mgmt) {
563		ret = os_snprintf(pos, end - pos, "key_mgmt=");
564		if (ret < 0 || ret >= end - pos)
565			return pos - buf;
566		pos += ret;
567
568		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
569			ret = os_snprintf(pos, end - pos, "WPA-PSK ");
570			if (ret < 0 || ret >= end - pos)
571				return pos - buf;
572			pos += ret;
573		}
574		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
575			ret = os_snprintf(pos, end - pos, "WPA-EAP ");
576			if (ret < 0 || ret >= end - pos)
577				return pos - buf;
578			pos += ret;
579		}
580#ifdef CONFIG_IEEE80211R
581		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
582			ret = os_snprintf(pos, end - pos, "FT-PSK ");
583			if (ret < 0 || ret >= end - pos)
584				return pos - buf;
585			pos += ret;
586		}
587		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
588			ret = os_snprintf(pos, end - pos, "FT-EAP ");
589			if (ret < 0 || ret >= end - pos)
590				return pos - buf;
591			pos += ret;
592		}
593#endif /* CONFIG_IEEE80211R */
594#ifdef CONFIG_IEEE80211W
595		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) {
596			ret = os_snprintf(pos, end - pos, "WPA-PSK-SHA256 ");
597			if (ret < 0 || ret >= end - pos)
598				return pos - buf;
599			pos += ret;
600		}
601		if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) {
602			ret = os_snprintf(pos, end - pos, "WPA-EAP-SHA256 ");
603			if (ret < 0 || ret >= end - pos)
604				return pos - buf;
605			pos += ret;
606		}
607#endif /* CONFIG_IEEE80211W */
608
609		ret = os_snprintf(pos, end - pos, "\n");
610		if (ret < 0 || ret >= end - pos)
611			return pos - buf;
612		pos += ret;
613	}
614
615	if (hapd->conf->wpa && hapd->conf->wpa_group == WPA_CIPHER_CCMP) {
616		ret = os_snprintf(pos, end - pos, "group_cipher=CCMP\n");
617		if (ret < 0 || ret >= end - pos)
618			return pos - buf;
619		pos += ret;
620	} else if (hapd->conf->wpa &&
621		   hapd->conf->wpa_group == WPA_CIPHER_TKIP) {
622		ret = os_snprintf(pos, end - pos, "group_cipher=TKIP\n");
623		if (ret < 0 || ret >= end - pos)
624			return pos - buf;
625		pos += ret;
626	}
627
628	if ((hapd->conf->wpa & WPA_PROTO_RSN) && hapd->conf->rsn_pairwise) {
629		ret = os_snprintf(pos, end - pos, "rsn_pairwise_cipher=");
630		if (ret < 0 || ret >= end - pos)
631			return pos - buf;
632		pos += ret;
633
634		if (hapd->conf->rsn_pairwise & WPA_CIPHER_CCMP) {
635			ret = os_snprintf(pos, end - pos, "CCMP ");
636			if (ret < 0 || ret >= end - pos)
637				return pos - buf;
638			pos += ret;
639		}
640		if (hapd->conf->rsn_pairwise & WPA_CIPHER_TKIP) {
641			ret = os_snprintf(pos, end - pos, "TKIP ");
642			if (ret < 0 || ret >= end - pos)
643				return pos - buf;
644			pos += ret;
645		}
646
647		ret = os_snprintf(pos, end - pos, "\n");
648		if (ret < 0 || ret >= end - pos)
649			return pos - buf;
650		pos += ret;
651	}
652
653	if ((hapd->conf->wpa & WPA_PROTO_WPA) && hapd->conf->wpa_pairwise) {
654		ret = os_snprintf(pos, end - pos, "wpa_pairwise_cipher=");
655		if (ret < 0 || ret >= end - pos)
656			return pos - buf;
657		pos += ret;
658
659		if (hapd->conf->wpa_pairwise & WPA_CIPHER_CCMP) {
660			ret = os_snprintf(pos, end - pos, "CCMP ");
661			if (ret < 0 || ret >= end - pos)
662				return pos - buf;
663			pos += ret;
664		}
665		if (hapd->conf->wpa_pairwise & WPA_CIPHER_TKIP) {
666			ret = os_snprintf(pos, end - pos, "TKIP ");
667			if (ret < 0 || ret >= end - pos)
668				return pos - buf;
669			pos += ret;
670		}
671
672		ret = os_snprintf(pos, end - pos, "\n");
673		if (ret < 0 || ret >= end - pos)
674			return pos - buf;
675		pos += ret;
676	}
677
678	return pos - buf;
679}
680
681
682static int hostapd_ctrl_iface_set(struct hostapd_data *hapd, char *cmd)
683{
684	char *value;
685	int ret = 0;
686
687	value = os_strchr(cmd, ' ');
688	if (value == NULL)
689		return -1;
690	*value++ = '\0';
691
692	wpa_printf(MSG_DEBUG, "CTRL_IFACE SET '%s'='%s'", cmd, value);
693	if (0) {
694#ifdef CONFIG_WPS_TESTING
695	} else if (os_strcasecmp(cmd, "wps_version_number") == 0) {
696		long int val;
697		val = strtol(value, NULL, 0);
698		if (val < 0 || val > 0xff) {
699			ret = -1;
700			wpa_printf(MSG_DEBUG, "WPS: Invalid "
701				   "wps_version_number %ld", val);
702		} else {
703			wps_version_number = val;
704			wpa_printf(MSG_DEBUG, "WPS: Testing - force WPS "
705				   "version %u.%u",
706				   (wps_version_number & 0xf0) >> 4,
707				   wps_version_number & 0x0f);
708			hostapd_wps_update_ie(hapd);
709		}
710	} else if (os_strcasecmp(cmd, "wps_testing_dummy_cred") == 0) {
711		wps_testing_dummy_cred = atoi(value);
712		wpa_printf(MSG_DEBUG, "WPS: Testing - dummy_cred=%d",
713			   wps_testing_dummy_cred);
714#endif /* CONFIG_WPS_TESTING */
715#ifdef CONFIG_INTERWORKING
716	} else if (os_strcasecmp(cmd, "gas_frag_limit") == 0) {
717		int val = atoi(value);
718		if (val <= 0)
719			ret = -1;
720		else
721			hapd->gas_frag_limit = val;
722#endif /* CONFIG_INTERWORKING */
723	} else {
724		ret = hostapd_set_iface(hapd->iconf, hapd->conf, cmd, value);
725	}
726
727	return ret;
728}
729
730
731static int hostapd_ctrl_iface_get(struct hostapd_data *hapd, char *cmd,
732				  char *buf, size_t buflen)
733{
734	int res;
735
736	wpa_printf(MSG_DEBUG, "CTRL_IFACE GET '%s'", cmd);
737
738	if (os_strcmp(cmd, "version") == 0) {
739		res = os_snprintf(buf, buflen, "%s", VERSION_STR);
740		if (res < 0 || (unsigned int) res >= buflen)
741			return -1;
742		return res;
743	}
744
745	return -1;
746}
747
748
749static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
750				       void *sock_ctx)
751{
752	struct hostapd_data *hapd = eloop_ctx;
753	char buf[256];
754	int res;
755	struct sockaddr_un from;
756	socklen_t fromlen = sizeof(from);
757	char *reply;
758	const int reply_size = 4096;
759	int reply_len;
760	int level = MSG_DEBUG;
761
762	res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
763		       (struct sockaddr *) &from, &fromlen);
764	if (res < 0) {
765		perror("recvfrom(ctrl_iface)");
766		return;
767	}
768	buf[res] = '\0';
769	if (os_strcmp(buf, "PING") == 0)
770		level = MSG_EXCESSIVE;
771	wpa_hexdump_ascii(level, "RX ctrl_iface", (u8 *) buf, res);
772
773	reply = os_malloc(reply_size);
774	if (reply == NULL) {
775		sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
776		       fromlen);
777		return;
778	}
779
780	os_memcpy(reply, "OK\n", 3);
781	reply_len = 3;
782
783	if (os_strcmp(buf, "PING") == 0) {
784		os_memcpy(reply, "PONG\n", 5);
785		reply_len = 5;
786	} else if (os_strncmp(buf, "RELOG", 5) == 0) {
787		if (wpa_debug_reopen_file() < 0)
788			reply_len = -1;
789	} else if (os_strcmp(buf, "MIB") == 0) {
790		reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
791		if (reply_len >= 0) {
792			res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
793					  reply_size - reply_len);
794			if (res < 0)
795				reply_len = -1;
796			else
797				reply_len += res;
798		}
799		if (reply_len >= 0) {
800			res = ieee802_1x_get_mib(hapd, reply + reply_len,
801						 reply_size - reply_len);
802			if (res < 0)
803				reply_len = -1;
804			else
805				reply_len += res;
806		}
807#ifndef CONFIG_NO_RADIUS
808		if (reply_len >= 0) {
809			res = radius_client_get_mib(hapd->radius,
810						    reply + reply_len,
811						    reply_size - reply_len);
812			if (res < 0)
813				reply_len = -1;
814			else
815				reply_len += res;
816		}
817#endif /* CONFIG_NO_RADIUS */
818	} else if (os_strcmp(buf, "STA-FIRST") == 0) {
819		reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
820							 reply_size);
821	} else if (os_strncmp(buf, "STA ", 4) == 0) {
822		reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
823						   reply_size);
824	} else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
825		reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
826							reply_size);
827	} else if (os_strcmp(buf, "ATTACH") == 0) {
828		if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
829			reply_len = -1;
830	} else if (os_strcmp(buf, "DETACH") == 0) {
831		if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
832			reply_len = -1;
833	} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
834		if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
835						    buf + 6))
836			reply_len = -1;
837	} else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
838		if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
839			reply_len = -1;
840	} else if (os_strncmp(buf, "DEAUTHENTICATE ", 15) == 0) {
841		if (hostapd_ctrl_iface_deauthenticate(hapd, buf + 15))
842			reply_len = -1;
843	} else if (os_strncmp(buf, "DISASSOCIATE ", 13) == 0) {
844		if (hostapd_ctrl_iface_disassociate(hapd, buf + 13))
845			reply_len = -1;
846#ifdef CONFIG_IEEE80211W
847#ifdef NEED_AP_MLME
848	} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
849		if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
850			reply_len = -1;
851#endif /* NEED_AP_MLME */
852#endif /* CONFIG_IEEE80211W */
853#ifdef CONFIG_WPS
854	} else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
855		if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
856			reply_len = -1;
857	} else if (os_strncmp(buf, "WPS_CHECK_PIN ", 14) == 0) {
858		reply_len = hostapd_ctrl_iface_wps_check_pin(
859			hapd, buf + 14, reply, reply_size);
860	} else if (os_strcmp(buf, "WPS_PBC") == 0) {
861		if (hostapd_wps_button_pushed(hapd, NULL))
862			reply_len = -1;
863	} else if (os_strcmp(buf, "WPS_CANCEL") == 0) {
864		if (hostapd_wps_cancel(hapd))
865			reply_len = -1;
866#ifdef CONFIG_WPS_OOB
867	} else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
868		if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
869			reply_len = -1;
870#endif /* CONFIG_WPS_OOB */
871	} else if (os_strncmp(buf, "WPS_AP_PIN ", 11) == 0) {
872		reply_len = hostapd_ctrl_iface_wps_ap_pin(hapd, buf + 11,
873							  reply, reply_size);
874	} else if (os_strncmp(buf, "WPS_CONFIG ", 11) == 0) {
875		if (hostapd_ctrl_iface_wps_config(hapd, buf + 11) < 0)
876			reply_len = -1;
877#ifdef CONFIG_WPS_NFC
878	} else if (os_strncmp(buf, "WPS_NFC_TAG_READ ", 17) == 0) {
879		if (hostapd_ctrl_iface_wps_nfc_tag_read(hapd, buf + 17))
880			reply_len = -1;
881	} else if (os_strncmp(buf, "WPS_NFC_CONFIG_TOKEN ", 21) == 0) {
882		reply_len = hostapd_ctrl_iface_wps_nfc_config_token(
883			hapd, buf + 21, reply, reply_size);
884	} else if (os_strncmp(buf, "WPS_NFC_TOKEN ", 14) == 0) {
885		reply_len = hostapd_ctrl_iface_wps_nfc_token(
886			hapd, buf + 14, reply, reply_size);
887#endif /* CONFIG_WPS_NFC */
888#endif /* CONFIG_WPS */
889	} else if (os_strncmp(buf, "ESS_DISASSOC ", 13) == 0) {
890		if (hostapd_ctrl_iface_ess_disassoc(hapd, buf + 13))
891			reply_len = -1;
892	} else if (os_strcmp(buf, "GET_CONFIG") == 0) {
893		reply_len = hostapd_ctrl_iface_get_config(hapd, reply,
894							  reply_size);
895	} else if (os_strncmp(buf, "SET ", 4) == 0) {
896		if (hostapd_ctrl_iface_set(hapd, buf + 4))
897			reply_len = -1;
898	} else if (os_strncmp(buf, "GET ", 4) == 0) {
899		reply_len = hostapd_ctrl_iface_get(hapd, buf + 4, reply,
900						   reply_size);
901	} else {
902		os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
903		reply_len = 16;
904	}
905
906	if (reply_len < 0) {
907		os_memcpy(reply, "FAIL\n", 5);
908		reply_len = 5;
909	}
910	sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
911	os_free(reply);
912}
913
914
915static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
916{
917	char *buf;
918	size_t len;
919
920	if (hapd->conf->ctrl_interface == NULL)
921		return NULL;
922
923	len = os_strlen(hapd->conf->ctrl_interface) +
924		os_strlen(hapd->conf->iface) + 2;
925	buf = os_malloc(len);
926	if (buf == NULL)
927		return NULL;
928
929	os_snprintf(buf, len, "%s/%s",
930		    hapd->conf->ctrl_interface, hapd->conf->iface);
931	buf[len - 1] = '\0';
932	return buf;
933}
934
935
936static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
937				      const char *txt, size_t len)
938{
939	struct hostapd_data *hapd = ctx;
940	if (hapd == NULL)
941		return;
942	hostapd_ctrl_iface_send(hapd, level, txt, len);
943}
944
945
946int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
947{
948	struct sockaddr_un addr;
949	int s = -1;
950	char *fname = NULL;
951
952	if (hapd->ctrl_sock > -1) {
953		wpa_printf(MSG_DEBUG, "ctrl_iface already exists!");
954		return 0;
955	}
956
957	if (hapd->conf->ctrl_interface == NULL)
958		return 0;
959
960	if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
961		if (errno == EEXIST) {
962			wpa_printf(MSG_DEBUG, "Using existing control "
963				   "interface directory.");
964		} else {
965			perror("mkdir[ctrl_interface]");
966			goto fail;
967		}
968	}
969
970	if (hapd->conf->ctrl_interface_gid_set &&
971	    chown(hapd->conf->ctrl_interface, 0,
972		  hapd->conf->ctrl_interface_gid) < 0) {
973		perror("chown[ctrl_interface]");
974		return -1;
975	}
976
977	if (os_strlen(hapd->conf->ctrl_interface) + 1 +
978	    os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
979		goto fail;
980
981	s = socket(PF_UNIX, SOCK_DGRAM, 0);
982	if (s < 0) {
983		perror("socket(PF_UNIX)");
984		goto fail;
985	}
986
987	os_memset(&addr, 0, sizeof(addr));
988#ifdef __FreeBSD__
989	addr.sun_len = sizeof(addr);
990#endif /* __FreeBSD__ */
991	addr.sun_family = AF_UNIX;
992	fname = hostapd_ctrl_iface_path(hapd);
993	if (fname == NULL)
994		goto fail;
995	os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
996	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
997		wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
998			   strerror(errno));
999		if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1000			wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
1001				   " allow connections - assuming it was left"
1002				   "over from forced program termination");
1003			if (unlink(fname) < 0) {
1004				perror("unlink[ctrl_iface]");
1005				wpa_printf(MSG_ERROR, "Could not unlink "
1006					   "existing ctrl_iface socket '%s'",
1007					   fname);
1008				goto fail;
1009			}
1010			if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
1011			    0) {
1012				perror("hostapd-ctrl-iface: bind(PF_UNIX)");
1013				goto fail;
1014			}
1015			wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
1016				   "ctrl_iface socket '%s'", fname);
1017		} else {
1018			wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
1019				   "be in use - cannot override it");
1020			wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
1021				   "not used anymore", fname);
1022			os_free(fname);
1023			fname = NULL;
1024			goto fail;
1025		}
1026	}
1027
1028	if (hapd->conf->ctrl_interface_gid_set &&
1029	    chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
1030		perror("chown[ctrl_interface/ifname]");
1031		goto fail;
1032	}
1033
1034	if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
1035		perror("chmod[ctrl_interface/ifname]");
1036		goto fail;
1037	}
1038	os_free(fname);
1039
1040	hapd->ctrl_sock = s;
1041	eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
1042				 NULL);
1043	hapd->msg_ctx = hapd;
1044	wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
1045
1046	return 0;
1047
1048fail:
1049	if (s >= 0)
1050		close(s);
1051	if (fname) {
1052		unlink(fname);
1053		os_free(fname);
1054	}
1055	return -1;
1056}
1057
1058
1059void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
1060{
1061	struct wpa_ctrl_dst *dst, *prev;
1062
1063	if (hapd->ctrl_sock > -1) {
1064		char *fname;
1065		eloop_unregister_read_sock(hapd->ctrl_sock);
1066		close(hapd->ctrl_sock);
1067		hapd->ctrl_sock = -1;
1068		fname = hostapd_ctrl_iface_path(hapd);
1069		if (fname)
1070			unlink(fname);
1071		os_free(fname);
1072
1073		if (hapd->conf->ctrl_interface &&
1074		    rmdir(hapd->conf->ctrl_interface) < 0) {
1075			if (errno == ENOTEMPTY) {
1076				wpa_printf(MSG_DEBUG, "Control interface "
1077					   "directory not empty - leaving it "
1078					   "behind");
1079			} else {
1080				perror("rmdir[ctrl_interface]");
1081			}
1082		}
1083	}
1084
1085	dst = hapd->ctrl_dst;
1086	while (dst) {
1087		prev = dst;
1088		dst = dst->next;
1089		os_free(prev);
1090	}
1091}
1092
1093
1094static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
1095				    const char *buf, size_t len)
1096{
1097	struct wpa_ctrl_dst *dst, *next;
1098	struct msghdr msg;
1099	int idx;
1100	struct iovec io[2];
1101	char levelstr[10];
1102
1103	dst = hapd->ctrl_dst;
1104	if (hapd->ctrl_sock < 0 || dst == NULL)
1105		return;
1106
1107	os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
1108	io[0].iov_base = levelstr;
1109	io[0].iov_len = os_strlen(levelstr);
1110	io[1].iov_base = (char *) buf;
1111	io[1].iov_len = len;
1112	os_memset(&msg, 0, sizeof(msg));
1113	msg.msg_iov = io;
1114	msg.msg_iovlen = 2;
1115
1116	idx = 0;
1117	while (dst) {
1118		next = dst->next;
1119		if (level >= dst->debug_level) {
1120			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
1121				    (u8 *) dst->addr.sun_path, dst->addrlen -
1122				    offsetof(struct sockaddr_un, sun_path));
1123			msg.msg_name = &dst->addr;
1124			msg.msg_namelen = dst->addrlen;
1125			if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
1126				int _errno = errno;
1127				wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
1128					   "%d - %s",
1129					   idx, errno, strerror(errno));
1130				dst->errors++;
1131				if (dst->errors > 10 || _errno == ENOENT) {
1132					hostapd_ctrl_iface_detach(
1133						hapd, &dst->addr,
1134						dst->addrlen);
1135				}
1136			} else
1137				dst->errors = 0;
1138		}
1139		idx++;
1140		dst = next;
1141	}
1142}
1143
1144#endif /* CONFIG_NATIVE_WINDOWS */
1145