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
38 struct 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
47 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
48 const char *buf, size_t len);
49
50
hostapd_ctrl_iface_attach(struct hostapd_data * hapd,struct sockaddr_un * from,socklen_t fromlen)51 static 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
hostapd_ctrl_iface_detach(struct hostapd_data * hapd,struct sockaddr_un * from,socklen_t fromlen)72 static 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
hostapd_ctrl_iface_level(struct hostapd_data * hapd,struct sockaddr_un * from,socklen_t fromlen,char * level)102 static 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
hostapd_ctrl_iface_new_sta(struct hostapd_data * hapd,const char * txtaddr)130 static 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
hostapd_ctrl_iface_sa_query(struct hostapd_data * hapd,const char * txtaddr)158 static 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
hostapd_ctrl_iface_wps_pin(struct hostapd_data * hapd,char * txt)179 static 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
hostapd_ctrl_iface_wps_check_pin(struct hostapd_data * hapd,char * cmd,char * buf,size_t buflen)208 static 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
hostapd_ctrl_iface_wps_oob(struct hostapd_data * hapd,char * txt)254 static 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
hostapd_ctrl_iface_wps_nfc_tag_read(struct hostapd_data * hapd,char * pos)278 static 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
hostapd_ctrl_iface_wps_nfc_config_token(struct hostapd_data * hapd,char * cmd,char * reply,size_t max_len)305 static 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
hostapd_ctrl_iface_wps_nfc_token_gen(struct hostapd_data * hapd,char * reply,size_t max_len,int ndef)335 static 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
hostapd_ctrl_iface_wps_nfc_token(struct hostapd_data * hapd,char * cmd,char * reply,size_t max_len)357 static 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
hostapd_ctrl_iface_wps_ap_pin(struct hostapd_data * hapd,char * txt,char * buf,size_t buflen)382 static 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
hostapd_ctrl_iface_wps_config(struct hostapd_data * hapd,char * txt)435 static 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
hostapd_ctrl_iface_ess_disassoc(struct hostapd_data * hapd,const char * cmd)463 static 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
hostapd_ctrl_iface_get_config(struct hostapd_data * hapd,char * buf,size_t buflen)514 static 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 wpa_ssid_txt(hapd->conf->ssid.ssid,
527 hapd->conf->ssid.ssid_len));
528 if (ret < 0 || ret >= end - pos)
529 return pos - buf;
530 pos += ret;
531
532 #ifdef CONFIG_WPS
533 ret = os_snprintf(pos, end - pos, "wps_state=%s\n",
534 hapd->conf->wps_state == 0 ? "disabled" :
535 (hapd->conf->wps_state == 1 ? "not configured" :
536 "configured"));
537 if (ret < 0 || ret >= end - pos)
538 return pos - buf;
539 pos += ret;
540
541 if (hapd->conf->wps_state && hapd->conf->wpa &&
542 hapd->conf->ssid.wpa_passphrase) {
543 ret = os_snprintf(pos, end - pos, "passphrase=%s\n",
544 hapd->conf->ssid.wpa_passphrase);
545 if (ret < 0 || ret >= end - pos)
546 return pos - buf;
547 pos += ret;
548 }
549
550 if (hapd->conf->wps_state && hapd->conf->wpa &&
551 hapd->conf->ssid.wpa_psk &&
552 hapd->conf->ssid.wpa_psk->group) {
553 char hex[PMK_LEN * 2 + 1];
554 wpa_snprintf_hex(hex, sizeof(hex),
555 hapd->conf->ssid.wpa_psk->psk, PMK_LEN);
556 ret = os_snprintf(pos, end - pos, "psk=%s\n", hex);
557 if (ret < 0 || ret >= end - pos)
558 return pos - buf;
559 pos += ret;
560 }
561 #endif /* CONFIG_WPS */
562
563 if (hapd->conf->wpa && hapd->conf->wpa_key_mgmt) {
564 ret = os_snprintf(pos, end - pos, "key_mgmt=");
565 if (ret < 0 || ret >= end - pos)
566 return pos - buf;
567 pos += ret;
568
569 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
570 ret = os_snprintf(pos, end - pos, "WPA-PSK ");
571 if (ret < 0 || ret >= end - pos)
572 return pos - buf;
573 pos += ret;
574 }
575 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
576 ret = os_snprintf(pos, end - pos, "WPA-EAP ");
577 if (ret < 0 || ret >= end - pos)
578 return pos - buf;
579 pos += ret;
580 }
581 #ifdef CONFIG_IEEE80211R
582 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
583 ret = os_snprintf(pos, end - pos, "FT-PSK ");
584 if (ret < 0 || ret >= end - pos)
585 return pos - buf;
586 pos += ret;
587 }
588 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
589 ret = os_snprintf(pos, end - pos, "FT-EAP ");
590 if (ret < 0 || ret >= end - pos)
591 return pos - buf;
592 pos += ret;
593 }
594 #endif /* CONFIG_IEEE80211R */
595 #ifdef CONFIG_IEEE80211W
596 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) {
597 ret = os_snprintf(pos, end - pos, "WPA-PSK-SHA256 ");
598 if (ret < 0 || ret >= end - pos)
599 return pos - buf;
600 pos += ret;
601 }
602 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) {
603 ret = os_snprintf(pos, end - pos, "WPA-EAP-SHA256 ");
604 if (ret < 0 || ret >= end - pos)
605 return pos - buf;
606 pos += ret;
607 }
608 #endif /* CONFIG_IEEE80211W */
609
610 ret = os_snprintf(pos, end - pos, "\n");
611 if (ret < 0 || ret >= end - pos)
612 return pos - buf;
613 pos += ret;
614 }
615
616 if (hapd->conf->wpa && hapd->conf->wpa_group == WPA_CIPHER_CCMP) {
617 ret = os_snprintf(pos, end - pos, "group_cipher=CCMP\n");
618 if (ret < 0 || ret >= end - pos)
619 return pos - buf;
620 pos += ret;
621 } else if (hapd->conf->wpa &&
622 hapd->conf->wpa_group == WPA_CIPHER_GCMP) {
623 ret = os_snprintf(pos, end - pos, "group_cipher=GCMP\n");
624 if (ret < 0 || ret >= end - pos)
625 return pos - buf;
626 pos += ret;
627 } else if (hapd->conf->wpa &&
628 hapd->conf->wpa_group == WPA_CIPHER_TKIP) {
629 ret = os_snprintf(pos, end - pos, "group_cipher=TKIP\n");
630 if (ret < 0 || ret >= end - pos)
631 return pos - buf;
632 pos += ret;
633 }
634
635 if ((hapd->conf->wpa & WPA_PROTO_RSN) && hapd->conf->rsn_pairwise) {
636 ret = os_snprintf(pos, end - pos, "rsn_pairwise_cipher=");
637 if (ret < 0 || ret >= end - pos)
638 return pos - buf;
639 pos += ret;
640
641 if (hapd->conf->rsn_pairwise & WPA_CIPHER_CCMP) {
642 ret = os_snprintf(pos, end - pos, "CCMP ");
643 if (ret < 0 || ret >= end - pos)
644 return pos - buf;
645 pos += ret;
646 }
647 if (hapd->conf->rsn_pairwise & WPA_CIPHER_GCMP) {
648 ret = os_snprintf(pos, end - pos, "GCMP ");
649 if (ret < 0 || ret >= end - pos)
650 return pos - buf;
651 pos += ret;
652 }
653 if (hapd->conf->rsn_pairwise & WPA_CIPHER_TKIP) {
654 ret = os_snprintf(pos, end - pos, "TKIP ");
655 if (ret < 0 || ret >= end - pos)
656 return pos - buf;
657 pos += ret;
658 }
659
660 ret = os_snprintf(pos, end - pos, "\n");
661 if (ret < 0 || ret >= end - pos)
662 return pos - buf;
663 pos += ret;
664 }
665
666 if ((hapd->conf->wpa & WPA_PROTO_WPA) && hapd->conf->wpa_pairwise) {
667 ret = os_snprintf(pos, end - pos, "wpa_pairwise_cipher=");
668 if (ret < 0 || ret >= end - pos)
669 return pos - buf;
670 pos += ret;
671
672 if (hapd->conf->wpa_pairwise & WPA_CIPHER_CCMP) {
673 ret = os_snprintf(pos, end - pos, "CCMP ");
674 if (ret < 0 || ret >= end - pos)
675 return pos - buf;
676 pos += ret;
677 }
678 if (hapd->conf->wpa_pairwise & WPA_CIPHER_GCMP) {
679 ret = os_snprintf(pos, end - pos, "GCMP ");
680 if (ret < 0 || ret >= end - pos)
681 return pos - buf;
682 pos += ret;
683 }
684 if (hapd->conf->wpa_pairwise & WPA_CIPHER_TKIP) {
685 ret = os_snprintf(pos, end - pos, "TKIP ");
686 if (ret < 0 || ret >= end - pos)
687 return pos - buf;
688 pos += ret;
689 }
690
691 ret = os_snprintf(pos, end - pos, "\n");
692 if (ret < 0 || ret >= end - pos)
693 return pos - buf;
694 pos += ret;
695 }
696
697 return pos - buf;
698 }
699
700
hostapd_ctrl_iface_set(struct hostapd_data * hapd,char * cmd)701 static int hostapd_ctrl_iface_set(struct hostapd_data *hapd, char *cmd)
702 {
703 char *value;
704 int ret = 0;
705
706 value = os_strchr(cmd, ' ');
707 if (value == NULL)
708 return -1;
709 *value++ = '\0';
710
711 wpa_printf(MSG_DEBUG, "CTRL_IFACE SET '%s'='%s'", cmd, value);
712 if (0) {
713 #ifdef CONFIG_WPS_TESTING
714 } else if (os_strcasecmp(cmd, "wps_version_number") == 0) {
715 long int val;
716 val = strtol(value, NULL, 0);
717 if (val < 0 || val > 0xff) {
718 ret = -1;
719 wpa_printf(MSG_DEBUG, "WPS: Invalid "
720 "wps_version_number %ld", val);
721 } else {
722 wps_version_number = val;
723 wpa_printf(MSG_DEBUG, "WPS: Testing - force WPS "
724 "version %u.%u",
725 (wps_version_number & 0xf0) >> 4,
726 wps_version_number & 0x0f);
727 hostapd_wps_update_ie(hapd);
728 }
729 } else if (os_strcasecmp(cmd, "wps_testing_dummy_cred") == 0) {
730 wps_testing_dummy_cred = atoi(value);
731 wpa_printf(MSG_DEBUG, "WPS: Testing - dummy_cred=%d",
732 wps_testing_dummy_cred);
733 #endif /* CONFIG_WPS_TESTING */
734 #ifdef CONFIG_INTERWORKING
735 } else if (os_strcasecmp(cmd, "gas_frag_limit") == 0) {
736 int val = atoi(value);
737 if (val <= 0)
738 ret = -1;
739 else
740 hapd->gas_frag_limit = val;
741 #endif /* CONFIG_INTERWORKING */
742 } else {
743 ret = hostapd_set_iface(hapd->iconf, hapd->conf, cmd, value);
744 }
745
746 return ret;
747 }
748
749
hostapd_ctrl_iface_get(struct hostapd_data * hapd,char * cmd,char * buf,size_t buflen)750 static int hostapd_ctrl_iface_get(struct hostapd_data *hapd, char *cmd,
751 char *buf, size_t buflen)
752 {
753 int res;
754
755 wpa_printf(MSG_DEBUG, "CTRL_IFACE GET '%s'", cmd);
756
757 if (os_strcmp(cmd, "version") == 0) {
758 res = os_snprintf(buf, buflen, "%s", VERSION_STR);
759 if (res < 0 || (unsigned int) res >= buflen)
760 return -1;
761 return res;
762 }
763
764 return -1;
765 }
766
767
hostapd_ctrl_iface_enable(struct hostapd_iface * iface)768 static int hostapd_ctrl_iface_enable(struct hostapd_iface *iface)
769 {
770 if (hostapd_enable_iface(iface) < 0) {
771 wpa_printf(MSG_ERROR, "Enabling of interface failed");
772 return -1;
773 }
774 return 0;
775 }
776
777
hostapd_ctrl_iface_reload(struct hostapd_iface * iface)778 static int hostapd_ctrl_iface_reload(struct hostapd_iface *iface)
779 {
780 if (hostapd_reload_iface(iface) < 0) {
781 wpa_printf(MSG_ERROR, "Reloading of interface failed");
782 return -1;
783 }
784 return 0;
785 }
786
787
hostapd_ctrl_iface_disable(struct hostapd_iface * iface)788 static int hostapd_ctrl_iface_disable(struct hostapd_iface *iface)
789 {
790 if (hostapd_disable_iface(iface) < 0) {
791 wpa_printf(MSG_ERROR, "Disabling of interface failed");
792 return -1;
793 }
794 return 0;
795 }
796
797
hostapd_ctrl_iface_receive(int sock,void * eloop_ctx,void * sock_ctx)798 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
799 void *sock_ctx)
800 {
801 struct hostapd_data *hapd = eloop_ctx;
802 char buf[256];
803 int res;
804 struct sockaddr_un from;
805 socklen_t fromlen = sizeof(from);
806 char *reply;
807 const int reply_size = 4096;
808 int reply_len;
809 int level = MSG_DEBUG;
810
811 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
812 (struct sockaddr *) &from, &fromlen);
813 if (res < 0) {
814 perror("recvfrom(ctrl_iface)");
815 return;
816 }
817 buf[res] = '\0';
818 if (os_strcmp(buf, "PING") == 0)
819 level = MSG_EXCESSIVE;
820 wpa_hexdump_ascii(level, "RX ctrl_iface", (u8 *) buf, res);
821
822 reply = os_malloc(reply_size);
823 if (reply == NULL) {
824 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
825 fromlen);
826 return;
827 }
828
829 os_memcpy(reply, "OK\n", 3);
830 reply_len = 3;
831
832 if (os_strcmp(buf, "PING") == 0) {
833 os_memcpy(reply, "PONG\n", 5);
834 reply_len = 5;
835 } else if (os_strncmp(buf, "RELOG", 5) == 0) {
836 if (wpa_debug_reopen_file() < 0)
837 reply_len = -1;
838 } else if (os_strcmp(buf, "MIB") == 0) {
839 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
840 if (reply_len >= 0) {
841 res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
842 reply_size - reply_len);
843 if (res < 0)
844 reply_len = -1;
845 else
846 reply_len += res;
847 }
848 if (reply_len >= 0) {
849 res = ieee802_1x_get_mib(hapd, reply + reply_len,
850 reply_size - reply_len);
851 if (res < 0)
852 reply_len = -1;
853 else
854 reply_len += res;
855 }
856 #ifndef CONFIG_NO_RADIUS
857 if (reply_len >= 0) {
858 res = radius_client_get_mib(hapd->radius,
859 reply + reply_len,
860 reply_size - reply_len);
861 if (res < 0)
862 reply_len = -1;
863 else
864 reply_len += res;
865 }
866 #endif /* CONFIG_NO_RADIUS */
867 } else if (os_strcmp(buf, "STA-FIRST") == 0) {
868 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
869 reply_size);
870 } else if (os_strncmp(buf, "STA ", 4) == 0) {
871 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
872 reply_size);
873 } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
874 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
875 reply_size);
876 } else if (os_strcmp(buf, "ATTACH") == 0) {
877 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
878 reply_len = -1;
879 } else if (os_strcmp(buf, "DETACH") == 0) {
880 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
881 reply_len = -1;
882 } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
883 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
884 buf + 6))
885 reply_len = -1;
886 } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
887 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
888 reply_len = -1;
889 } else if (os_strncmp(buf, "DEAUTHENTICATE ", 15) == 0) {
890 if (hostapd_ctrl_iface_deauthenticate(hapd, buf + 15))
891 reply_len = -1;
892 } else if (os_strncmp(buf, "DISASSOCIATE ", 13) == 0) {
893 if (hostapd_ctrl_iface_disassociate(hapd, buf + 13))
894 reply_len = -1;
895 #ifdef CONFIG_IEEE80211W
896 #ifdef NEED_AP_MLME
897 } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
898 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
899 reply_len = -1;
900 #endif /* NEED_AP_MLME */
901 #endif /* CONFIG_IEEE80211W */
902 #ifdef CONFIG_WPS
903 } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
904 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
905 reply_len = -1;
906 } else if (os_strncmp(buf, "WPS_CHECK_PIN ", 14) == 0) {
907 reply_len = hostapd_ctrl_iface_wps_check_pin(
908 hapd, buf + 14, reply, reply_size);
909 } else if (os_strcmp(buf, "WPS_PBC") == 0) {
910 if (hostapd_wps_button_pushed(hapd, NULL))
911 reply_len = -1;
912 } else if (os_strcmp(buf, "WPS_CANCEL") == 0) {
913 if (hostapd_wps_cancel(hapd))
914 reply_len = -1;
915 #ifdef CONFIG_WPS_OOB
916 } else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
917 if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
918 reply_len = -1;
919 #endif /* CONFIG_WPS_OOB */
920 } else if (os_strncmp(buf, "WPS_AP_PIN ", 11) == 0) {
921 reply_len = hostapd_ctrl_iface_wps_ap_pin(hapd, buf + 11,
922 reply, reply_size);
923 } else if (os_strncmp(buf, "WPS_CONFIG ", 11) == 0) {
924 if (hostapd_ctrl_iface_wps_config(hapd, buf + 11) < 0)
925 reply_len = -1;
926 #ifdef CONFIG_WPS_NFC
927 } else if (os_strncmp(buf, "WPS_NFC_TAG_READ ", 17) == 0) {
928 if (hostapd_ctrl_iface_wps_nfc_tag_read(hapd, buf + 17))
929 reply_len = -1;
930 } else if (os_strncmp(buf, "WPS_NFC_CONFIG_TOKEN ", 21) == 0) {
931 reply_len = hostapd_ctrl_iface_wps_nfc_config_token(
932 hapd, buf + 21, reply, reply_size);
933 } else if (os_strncmp(buf, "WPS_NFC_TOKEN ", 14) == 0) {
934 reply_len = hostapd_ctrl_iface_wps_nfc_token(
935 hapd, buf + 14, reply, reply_size);
936 #endif /* CONFIG_WPS_NFC */
937 #endif /* CONFIG_WPS */
938 } else if (os_strncmp(buf, "ESS_DISASSOC ", 13) == 0) {
939 if (hostapd_ctrl_iface_ess_disassoc(hapd, buf + 13))
940 reply_len = -1;
941 } else if (os_strcmp(buf, "GET_CONFIG") == 0) {
942 reply_len = hostapd_ctrl_iface_get_config(hapd, reply,
943 reply_size);
944 } else if (os_strncmp(buf, "SET ", 4) == 0) {
945 if (hostapd_ctrl_iface_set(hapd, buf + 4))
946 reply_len = -1;
947 } else if (os_strncmp(buf, "GET ", 4) == 0) {
948 reply_len = hostapd_ctrl_iface_get(hapd, buf + 4, reply,
949 reply_size);
950 } else if (os_strncmp(buf, "ENABLE", 6) == 0) {
951 if (hostapd_ctrl_iface_enable(hapd->iface))
952 reply_len = -1;
953 } else if (os_strncmp(buf, "RELOAD", 6) == 0) {
954 if (hostapd_ctrl_iface_reload(hapd->iface))
955 reply_len = -1;
956 } else if (os_strncmp(buf, "DISABLE", 7) == 0) {
957 if (hostapd_ctrl_iface_disable(hapd->iface))
958 reply_len = -1;
959 } else {
960 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
961 reply_len = 16;
962 }
963
964 if (reply_len < 0) {
965 os_memcpy(reply, "FAIL\n", 5);
966 reply_len = 5;
967 }
968 sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
969 os_free(reply);
970 }
971
972
hostapd_ctrl_iface_path(struct hostapd_data * hapd)973 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
974 {
975 char *buf;
976 size_t len;
977
978 if (hapd->conf->ctrl_interface == NULL)
979 return NULL;
980
981 len = os_strlen(hapd->conf->ctrl_interface) +
982 os_strlen(hapd->conf->iface) + 2;
983 buf = os_malloc(len);
984 if (buf == NULL)
985 return NULL;
986
987 os_snprintf(buf, len, "%s/%s",
988 hapd->conf->ctrl_interface, hapd->conf->iface);
989 buf[len - 1] = '\0';
990 return buf;
991 }
992
993
hostapd_ctrl_iface_msg_cb(void * ctx,int level,const char * txt,size_t len)994 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
995 const char *txt, size_t len)
996 {
997 struct hostapd_data *hapd = ctx;
998 if (hapd == NULL)
999 return;
1000 hostapd_ctrl_iface_send(hapd, level, txt, len);
1001 }
1002
1003
hostapd_ctrl_iface_init(struct hostapd_data * hapd)1004 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
1005 {
1006 struct sockaddr_un addr;
1007 int s = -1;
1008 char *fname = NULL;
1009
1010 if (hapd->ctrl_sock > -1) {
1011 wpa_printf(MSG_DEBUG, "ctrl_iface already exists!");
1012 return 0;
1013 }
1014
1015 if (hapd->conf->ctrl_interface == NULL)
1016 return 0;
1017
1018 if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
1019 if (errno == EEXIST) {
1020 wpa_printf(MSG_DEBUG, "Using existing control "
1021 "interface directory.");
1022 } else {
1023 perror("mkdir[ctrl_interface]");
1024 goto fail;
1025 }
1026 }
1027
1028 if (hapd->conf->ctrl_interface_gid_set &&
1029 chown(hapd->conf->ctrl_interface, 0,
1030 hapd->conf->ctrl_interface_gid) < 0) {
1031 perror("chown[ctrl_interface]");
1032 return -1;
1033 }
1034
1035 if (os_strlen(hapd->conf->ctrl_interface) + 1 +
1036 os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
1037 goto fail;
1038
1039 s = socket(PF_UNIX, SOCK_DGRAM, 0);
1040 if (s < 0) {
1041 perror("socket(PF_UNIX)");
1042 goto fail;
1043 }
1044
1045 os_memset(&addr, 0, sizeof(addr));
1046 #ifdef __FreeBSD__
1047 addr.sun_len = sizeof(addr);
1048 #endif /* __FreeBSD__ */
1049 addr.sun_family = AF_UNIX;
1050 fname = hostapd_ctrl_iface_path(hapd);
1051 if (fname == NULL)
1052 goto fail;
1053 os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
1054 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1055 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
1056 strerror(errno));
1057 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1058 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
1059 " allow connections - assuming it was left"
1060 "over from forced program termination");
1061 if (unlink(fname) < 0) {
1062 perror("unlink[ctrl_iface]");
1063 wpa_printf(MSG_ERROR, "Could not unlink "
1064 "existing ctrl_iface socket '%s'",
1065 fname);
1066 goto fail;
1067 }
1068 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
1069 0) {
1070 perror("hostapd-ctrl-iface: bind(PF_UNIX)");
1071 goto fail;
1072 }
1073 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
1074 "ctrl_iface socket '%s'", fname);
1075 } else {
1076 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
1077 "be in use - cannot override it");
1078 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
1079 "not used anymore", fname);
1080 os_free(fname);
1081 fname = NULL;
1082 goto fail;
1083 }
1084 }
1085
1086 if (hapd->conf->ctrl_interface_gid_set &&
1087 chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
1088 perror("chown[ctrl_interface/ifname]");
1089 goto fail;
1090 }
1091
1092 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
1093 perror("chmod[ctrl_interface/ifname]");
1094 goto fail;
1095 }
1096 os_free(fname);
1097
1098 hapd->ctrl_sock = s;
1099 eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
1100 NULL);
1101 hapd->msg_ctx = hapd;
1102 wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
1103
1104 return 0;
1105
1106 fail:
1107 if (s >= 0)
1108 close(s);
1109 if (fname) {
1110 unlink(fname);
1111 os_free(fname);
1112 }
1113 return -1;
1114 }
1115
1116
hostapd_ctrl_iface_deinit(struct hostapd_data * hapd)1117 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
1118 {
1119 struct wpa_ctrl_dst *dst, *prev;
1120
1121 if (hapd->ctrl_sock > -1) {
1122 char *fname;
1123 eloop_unregister_read_sock(hapd->ctrl_sock);
1124 close(hapd->ctrl_sock);
1125 hapd->ctrl_sock = -1;
1126 fname = hostapd_ctrl_iface_path(hapd);
1127 if (fname)
1128 unlink(fname);
1129 os_free(fname);
1130
1131 if (hapd->conf->ctrl_interface &&
1132 rmdir(hapd->conf->ctrl_interface) < 0) {
1133 if (errno == ENOTEMPTY) {
1134 wpa_printf(MSG_DEBUG, "Control interface "
1135 "directory not empty - leaving it "
1136 "behind");
1137 } else {
1138 perror("rmdir[ctrl_interface]");
1139 }
1140 }
1141 }
1142
1143 dst = hapd->ctrl_dst;
1144 while (dst) {
1145 prev = dst;
1146 dst = dst->next;
1147 os_free(prev);
1148 }
1149 }
1150
1151
hostapd_ctrl_iface_add(struct hapd_interfaces * interfaces,char * buf)1152 static int hostapd_ctrl_iface_add(struct hapd_interfaces *interfaces,
1153 char *buf)
1154 {
1155 if (hostapd_add_iface(interfaces, buf) < 0) {
1156 wpa_printf(MSG_ERROR, "Adding interface %s failed", buf);
1157 return -1;
1158 }
1159 return 0;
1160 }
1161
1162
hostapd_ctrl_iface_remove(struct hapd_interfaces * interfaces,char * buf)1163 static int hostapd_ctrl_iface_remove(struct hapd_interfaces *interfaces,
1164 char *buf)
1165 {
1166 if (hostapd_remove_iface(interfaces, buf) < 0) {
1167 wpa_printf(MSG_ERROR, "Removing interface %s failed", buf);
1168 return -1;
1169 }
1170 return 0;
1171 }
1172
1173
hostapd_global_ctrl_iface_receive(int sock,void * eloop_ctx,void * sock_ctx)1174 static void hostapd_global_ctrl_iface_receive(int sock, void *eloop_ctx,
1175 void *sock_ctx)
1176 {
1177 void *interfaces = eloop_ctx;
1178 char buf[256];
1179 int res;
1180 struct sockaddr_un from;
1181 socklen_t fromlen = sizeof(from);
1182 char reply[24];
1183 int reply_len;
1184
1185 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
1186 (struct sockaddr *) &from, &fromlen);
1187 if (res < 0) {
1188 perror("recvfrom(ctrl_iface)");
1189 return;
1190 }
1191 buf[res] = '\0';
1192
1193 os_memcpy(reply, "OK\n", 3);
1194 reply_len = 3;
1195
1196 if (os_strcmp(buf, "PING") == 0) {
1197 os_memcpy(reply, "PONG\n", 5);
1198 reply_len = 5;
1199 } else if (os_strncmp(buf, "ADD ", 4) == 0) {
1200 if (hostapd_ctrl_iface_add(interfaces, buf + 4) < 0)
1201 reply_len = -1;
1202 } else if (os_strncmp(buf, "REMOVE ", 7) == 0) {
1203 if (hostapd_ctrl_iface_remove(interfaces, buf + 7) < 0)
1204 reply_len = -1;
1205 } else {
1206 wpa_printf(MSG_DEBUG, "Unrecognized global ctrl_iface command "
1207 "ignored");
1208 reply_len = -1;
1209 }
1210
1211 if (reply_len < 0) {
1212 os_memcpy(reply, "FAIL\n", 5);
1213 reply_len = 5;
1214 }
1215
1216 sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
1217 }
1218
1219
hostapd_global_ctrl_iface_path(struct hapd_interfaces * interface)1220 static char * hostapd_global_ctrl_iface_path(struct hapd_interfaces *interface)
1221 {
1222 char *buf;
1223 size_t len;
1224
1225 if (interface->global_iface_path == NULL)
1226 return NULL;
1227
1228 len = os_strlen(interface->global_iface_path) +
1229 os_strlen(interface->global_iface_name) + 2;
1230 buf = os_malloc(len);
1231 if (buf == NULL)
1232 return NULL;
1233
1234 os_snprintf(buf, len, "%s/%s", interface->global_iface_path,
1235 interface->global_iface_name);
1236 buf[len - 1] = '\0';
1237 return buf;
1238 }
1239
1240
hostapd_global_ctrl_iface_init(struct hapd_interfaces * interface)1241 int hostapd_global_ctrl_iface_init(struct hapd_interfaces *interface)
1242 {
1243 struct sockaddr_un addr;
1244 int s = -1;
1245 char *fname = NULL;
1246
1247 if (interface->global_iface_path == NULL) {
1248 wpa_printf(MSG_DEBUG, "ctrl_iface not configured!");
1249 return 0;
1250 }
1251
1252 if (mkdir(interface->global_iface_path, S_IRWXU | S_IRWXG) < 0) {
1253 if (errno == EEXIST) {
1254 wpa_printf(MSG_DEBUG, "Using existing control "
1255 "interface directory.");
1256 } else {
1257 perror("mkdir[ctrl_interface]");
1258 goto fail;
1259 }
1260 }
1261
1262 if (os_strlen(interface->global_iface_path) + 1 +
1263 os_strlen(interface->global_iface_name) >= sizeof(addr.sun_path))
1264 goto fail;
1265
1266 s = socket(PF_UNIX, SOCK_DGRAM, 0);
1267 if (s < 0) {
1268 perror("socket(PF_UNIX)");
1269 goto fail;
1270 }
1271
1272 os_memset(&addr, 0, sizeof(addr));
1273 #ifdef __FreeBSD__
1274 addr.sun_len = sizeof(addr);
1275 #endif /* __FreeBSD__ */
1276 addr.sun_family = AF_UNIX;
1277 fname = hostapd_global_ctrl_iface_path(interface);
1278 if (fname == NULL)
1279 goto fail;
1280 os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
1281 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1282 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
1283 strerror(errno));
1284 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1285 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
1286 " allow connections - assuming it was left"
1287 "over from forced program termination");
1288 if (unlink(fname) < 0) {
1289 perror("unlink[ctrl_iface]");
1290 wpa_printf(MSG_ERROR, "Could not unlink "
1291 "existing ctrl_iface socket '%s'",
1292 fname);
1293 goto fail;
1294 }
1295 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
1296 0) {
1297 perror("bind(PF_UNIX)");
1298 goto fail;
1299 }
1300 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
1301 "ctrl_iface socket '%s'", fname);
1302 } else {
1303 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
1304 "be in use - cannot override it");
1305 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
1306 "not used anymore", fname);
1307 os_free(fname);
1308 fname = NULL;
1309 goto fail;
1310 }
1311 }
1312
1313 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
1314 perror("chmod[ctrl_interface/ifname]");
1315 goto fail;
1316 }
1317 os_free(fname);
1318
1319 interface->global_ctrl_sock = s;
1320 eloop_register_read_sock(s, hostapd_global_ctrl_iface_receive,
1321 interface, NULL);
1322
1323 return 0;
1324
1325 fail:
1326 if (s >= 0)
1327 close(s);
1328 if (fname) {
1329 unlink(fname);
1330 os_free(fname);
1331 }
1332 return -1;
1333 }
1334
1335
hostapd_global_ctrl_iface_deinit(struct hapd_interfaces * interfaces)1336 void hostapd_global_ctrl_iface_deinit(struct hapd_interfaces *interfaces)
1337 {
1338 char *fname = NULL;
1339
1340 if (interfaces->global_ctrl_sock > -1) {
1341 eloop_unregister_read_sock(interfaces->global_ctrl_sock);
1342 close(interfaces->global_ctrl_sock);
1343 interfaces->global_ctrl_sock = -1;
1344 fname = hostapd_global_ctrl_iface_path(interfaces);
1345 if (fname) {
1346 unlink(fname);
1347 os_free(fname);
1348 }
1349
1350 if (interfaces->global_iface_path &&
1351 rmdir(interfaces->global_iface_path) < 0) {
1352 if (errno == ENOTEMPTY) {
1353 wpa_printf(MSG_DEBUG, "Control interface "
1354 "directory not empty - leaving it "
1355 "behind");
1356 } else {
1357 perror("rmdir[ctrl_interface]");
1358 }
1359 }
1360 os_free(interfaces->global_iface_path);
1361 interfaces->global_iface_path = NULL;
1362 }
1363 }
1364
1365
hostapd_ctrl_iface_send(struct hostapd_data * hapd,int level,const char * buf,size_t len)1366 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
1367 const char *buf, size_t len)
1368 {
1369 struct wpa_ctrl_dst *dst, *next;
1370 struct msghdr msg;
1371 int idx;
1372 struct iovec io[2];
1373 char levelstr[10];
1374
1375 dst = hapd->ctrl_dst;
1376 if (hapd->ctrl_sock < 0 || dst == NULL)
1377 return;
1378
1379 os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
1380 io[0].iov_base = levelstr;
1381 io[0].iov_len = os_strlen(levelstr);
1382 io[1].iov_base = (char *) buf;
1383 io[1].iov_len = len;
1384 os_memset(&msg, 0, sizeof(msg));
1385 msg.msg_iov = io;
1386 msg.msg_iovlen = 2;
1387
1388 idx = 0;
1389 while (dst) {
1390 next = dst->next;
1391 if (level >= dst->debug_level) {
1392 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
1393 (u8 *) dst->addr.sun_path, dst->addrlen -
1394 offsetof(struct sockaddr_un, sun_path));
1395 msg.msg_name = &dst->addr;
1396 msg.msg_namelen = dst->addrlen;
1397 if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
1398 int _errno = errno;
1399 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
1400 "%d - %s",
1401 idx, errno, strerror(errno));
1402 dst->errors++;
1403 if (dst->errors > 10 || _errno == ENOENT) {
1404 hostapd_ctrl_iface_detach(
1405 hapd, &dst->addr,
1406 dst->addrlen);
1407 }
1408 } else
1409 dst->errors = 0;
1410 }
1411 idx++;
1412 dst = next;
1413 }
1414 }
1415
1416 #endif /* CONFIG_NATIVE_WINDOWS */
1417