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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant / UNIX domain socket -based control interface | |
c9b55597 | 3 | * Copyright (c) 2004-2014, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
9 | #include "includes.h" | |
10 | #include <sys/un.h> | |
11 | #include <sys/stat.h> | |
12 | #include <grp.h> | |
19b9436c | 13 | #include <stddef.h> |
4fdc8def BG |
14 | #include <unistd.h> |
15 | #include <fcntl.h> | |
2e95cfc1 JM |
16 | #ifdef __linux__ |
17 | #include <sys/ioctl.h> | |
2e95cfc1 | 18 | #endif /* __linux__ */ |
b3f3865e DS |
19 | #ifdef ANDROID |
20 | #include <cutils/sockets.h> | |
21 | #endif /* ANDROID */ | |
6fc6879b | 22 | |
09e47a07 JM |
23 | #include "utils/common.h" |
24 | #include "utils/eloop.h" | |
25 | #include "utils/list.h" | |
1a2124c6 | 26 | #include "common/ctrl_iface_common.h" |
6fc6879b | 27 | #include "eapol_supp/eapol_supp_sm.h" |
09e47a07 | 28 | #include "config.h" |
6fc6879b JM |
29 | #include "wpa_supplicant_i.h" |
30 | #include "ctrl_iface.h" | |
31 | ||
32 | /* Per-interface ctrl_iface */ | |
33 | ||
6fc6879b JM |
34 | struct ctrl_iface_priv { |
35 | struct wpa_supplicant *wpa_s; | |
36 | int sock; | |
09e47a07 | 37 | struct dl_list ctrl_dst; |
3a7414b6 | 38 | int android_control_socket; |
3fdaaa8f JM |
39 | struct dl_list msg_queue; |
40 | unsigned int throttle_count; | |
6fc6879b JM |
41 | }; |
42 | ||
43 | ||
214e428b JM |
44 | struct ctrl_iface_global_priv { |
45 | struct wpa_global *global; | |
46 | int sock; | |
47 | struct dl_list ctrl_dst; | |
3a7414b6 | 48 | int android_control_socket; |
3fdaaa8f JM |
49 | struct dl_list msg_queue; |
50 | unsigned int throttle_count; | |
51 | }; | |
52 | ||
53 | struct ctrl_iface_msg { | |
54 | struct dl_list list; | |
55 | struct wpa_supplicant *wpa_s; | |
56 | int level; | |
57 | enum wpa_msg_type type; | |
58 | const char *txt; | |
59 | size_t len; | |
214e428b JM |
60 | }; |
61 | ||
62 | ||
89286e91 JM |
63 | static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s, |
64 | const char *ifname, int sock, | |
214e428b | 65 | struct dl_list *ctrl_dst, |
6fc6879b | 66 | int level, const char *buf, |
89286e91 JM |
67 | size_t len, |
68 | struct ctrl_iface_priv *priv, | |
69 | struct ctrl_iface_global_priv *gp); | |
70 | static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s, | |
71 | struct ctrl_iface_priv *priv); | |
72 | static int wpas_ctrl_iface_global_reinit(struct wpa_global *global, | |
73 | struct ctrl_iface_global_priv *priv); | |
6fc6879b JM |
74 | |
75 | ||
2e95cfc1 JM |
76 | static void wpas_ctrl_sock_debug(const char *title, int sock, const char *buf, |
77 | size_t len) | |
78 | { | |
79 | #ifdef __linux__ | |
80 | socklen_t optlen; | |
81 | int sndbuf, outq; | |
43fa110b | 82 | int level = MSG_MSGDUMP; |
2e95cfc1 JM |
83 | |
84 | if (len >= 5 && os_strncmp(buf, "PONG\n", 5) == 0) | |
85 | level = MSG_EXCESSIVE; | |
86 | ||
87 | optlen = sizeof(sndbuf); | |
88 | sndbuf = 0; | |
89 | if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, &optlen) < 0) | |
90 | sndbuf = -1; | |
91 | ||
31afdd22 | 92 | if (ioctl(sock, TIOCOUTQ, &outq) < 0) |
2e95cfc1 JM |
93 | outq = -1; |
94 | ||
95 | wpa_printf(level, | |
96 | "CTRL-DEBUG: %s: sock=%d sndbuf=%d outq=%d send_len=%d", | |
97 | title, sock, sndbuf, outq, (int) len); | |
98 | #endif /* __linux__ */ | |
99 | } | |
100 | ||
101 | ||
214e428b | 102 | static int wpa_supplicant_ctrl_iface_attach(struct dl_list *ctrl_dst, |
acf57fae | 103 | struct sockaddr_storage *from, |
0efcad2c | 104 | socklen_t fromlen, int global) |
6fc6879b | 105 | { |
cc79e06f | 106 | return ctrl_iface_attach(ctrl_dst, from, fromlen, NULL); |
6fc6879b JM |
107 | } |
108 | ||
109 | ||
214e428b | 110 | static int wpa_supplicant_ctrl_iface_detach(struct dl_list *ctrl_dst, |
acf57fae | 111 | struct sockaddr_storage *from, |
6fc6879b JM |
112 | socklen_t fromlen) |
113 | { | |
1a2124c6 | 114 | return ctrl_iface_detach(ctrl_dst, from, fromlen); |
6fc6879b JM |
115 | } |
116 | ||
117 | ||
118 | static int wpa_supplicant_ctrl_iface_level(struct ctrl_iface_priv *priv, | |
acf57fae | 119 | struct sockaddr_storage *from, |
6fc6879b JM |
120 | socklen_t fromlen, |
121 | char *level) | |
122 | { | |
6fc6879b JM |
123 | wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level); |
124 | ||
1a2124c6 | 125 | return ctrl_iface_level(&priv->ctrl_dst, from, fromlen, level); |
6fc6879b JM |
126 | } |
127 | ||
128 | ||
129 | static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx, | |
130 | void *sock_ctx) | |
131 | { | |
132 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
133 | struct ctrl_iface_priv *priv = sock_ctx; | |
b563b388 | 134 | char buf[4096]; |
6fc6879b | 135 | int res; |
acf57fae | 136 | struct sockaddr_storage from; |
6fc6879b | 137 | socklen_t fromlen = sizeof(from); |
742e715b | 138 | char *reply = NULL, *reply_buf = NULL; |
6fc6879b JM |
139 | size_t reply_len = 0; |
140 | int new_attached = 0; | |
141 | ||
142 | res = recvfrom(sock, buf, sizeof(buf) - 1, 0, | |
143 | (struct sockaddr *) &from, &fromlen); | |
144 | if (res < 0) { | |
2c6f8cf6 JM |
145 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
146 | strerror(errno)); | |
6fc6879b JM |
147 | return; |
148 | } | |
149 | buf[res] = '\0'; | |
150 | ||
151 | if (os_strcmp(buf, "ATTACH") == 0) { | |
214e428b | 152 | if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from, |
0efcad2c | 153 | fromlen, 0)) |
6fc6879b JM |
154 | reply_len = 1; |
155 | else { | |
156 | new_attached = 1; | |
157 | reply_len = 2; | |
158 | } | |
159 | } else if (os_strcmp(buf, "DETACH") == 0) { | |
214e428b JM |
160 | if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from, |
161 | fromlen)) | |
6fc6879b JM |
162 | reply_len = 1; |
163 | else | |
164 | reply_len = 2; | |
165 | } else if (os_strncmp(buf, "LEVEL ", 6) == 0) { | |
166 | if (wpa_supplicant_ctrl_iface_level(priv, &from, fromlen, | |
167 | buf + 6)) | |
168 | reply_len = 1; | |
169 | else | |
170 | reply_len = 2; | |
171 | } else { | |
742e715b JM |
172 | reply_buf = wpa_supplicant_ctrl_iface_process(wpa_s, buf, |
173 | &reply_len); | |
174 | reply = reply_buf; | |
14fd0331 JM |
175 | |
176 | /* | |
177 | * There could be some password/key material in the command, so | |
178 | * clear the buffer explicitly now that it is not needed | |
179 | * anymore. | |
180 | */ | |
181 | os_memset(buf, 0, res); | |
742e715b JM |
182 | } |
183 | ||
184 | if (!reply && reply_len == 1) { | |
185 | reply = "FAIL\n"; | |
186 | reply_len = 5; | |
187 | } else if (!reply && reply_len == 2) { | |
188 | reply = "OK\n"; | |
189 | reply_len = 3; | |
6fc6879b JM |
190 | } |
191 | ||
192 | if (reply) { | |
2e95cfc1 JM |
193 | wpas_ctrl_sock_debug("ctrl_sock-sendto", sock, reply, |
194 | reply_len); | |
79986bf6 JM |
195 | if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, |
196 | fromlen) < 0) { | |
89286e91 | 197 | int _errno = errno; |
79986bf6 | 198 | wpa_dbg(wpa_s, MSG_DEBUG, |
89286e91 JM |
199 | "ctrl_iface sendto failed: %d - %s", |
200 | _errno, strerror(_errno)); | |
201 | if (_errno == ENOBUFS || _errno == EAGAIN) { | |
202 | /* | |
203 | * The socket send buffer could be full. This | |
204 | * may happen if client programs are not | |
205 | * receiving their pending messages. Close and | |
206 | * reopen the socket as a workaround to avoid | |
207 | * getting stuck being unable to send any new | |
208 | * responses. | |
209 | */ | |
210 | sock = wpas_ctrl_iface_reinit(wpa_s, priv); | |
211 | if (sock < 0) { | |
212 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to reinitialize ctrl_iface socket"); | |
213 | } | |
214 | } | |
215 | if (new_attached) { | |
216 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to send response to ATTACH - detaching"); | |
217 | new_attached = 0; | |
218 | wpa_supplicant_ctrl_iface_detach( | |
219 | &priv->ctrl_dst, &from, fromlen); | |
220 | } | |
79986bf6 | 221 | } |
6fc6879b | 222 | } |
742e715b | 223 | os_free(reply_buf); |
6fc6879b JM |
224 | |
225 | if (new_attached) | |
226 | eapol_sm_notify_ctrl_attached(wpa_s->eapol); | |
227 | } | |
228 | ||
229 | ||
230 | static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s) | |
231 | { | |
232 | char *buf; | |
233 | size_t len; | |
6ed626df | 234 | char *pbuf, *dir = NULL; |
6fc6879b JM |
235 | int res; |
236 | ||
237 | if (wpa_s->conf->ctrl_interface == NULL) | |
238 | return NULL; | |
239 | ||
240 | pbuf = os_strdup(wpa_s->conf->ctrl_interface); | |
241 | if (pbuf == NULL) | |
242 | return NULL; | |
243 | if (os_strncmp(pbuf, "DIR=", 4) == 0) { | |
6ed626df | 244 | char *gid_str; |
6fc6879b JM |
245 | dir = pbuf + 4; |
246 | gid_str = os_strstr(dir, " GROUP="); | |
6ed626df | 247 | if (gid_str) |
6fc6879b | 248 | *gid_str = '\0'; |
6fc6879b JM |
249 | } else |
250 | dir = pbuf; | |
251 | ||
252 | len = os_strlen(dir) + os_strlen(wpa_s->ifname) + 2; | |
253 | buf = os_malloc(len); | |
254 | if (buf == NULL) { | |
255 | os_free(pbuf); | |
256 | return NULL; | |
257 | } | |
258 | ||
259 | res = os_snprintf(buf, len, "%s/%s", dir, wpa_s->ifname); | |
d85e1fc8 | 260 | if (os_snprintf_error(len, res)) { |
6fc6879b JM |
261 | os_free(pbuf); |
262 | os_free(buf); | |
263 | return NULL; | |
264 | } | |
265 | #ifdef __CYGWIN__ | |
266 | { | |
267 | /* Windows/WinPcap uses interface names that are not suitable | |
268 | * as a file name - convert invalid chars to underscores */ | |
269 | char *pos = buf; | |
270 | while (*pos) { | |
271 | if (*pos == '\\') | |
272 | *pos = '_'; | |
273 | pos++; | |
274 | } | |
275 | } | |
276 | #endif /* __CYGWIN__ */ | |
277 | os_free(pbuf); | |
278 | return buf; | |
279 | } | |
280 | ||
281 | ||
3fdaaa8f JM |
282 | static int wpas_ctrl_iface_throttle(int sock) |
283 | { | |
284 | #ifdef __linux__ | |
285 | socklen_t optlen; | |
286 | int sndbuf, outq; | |
287 | ||
288 | optlen = sizeof(sndbuf); | |
289 | sndbuf = 0; | |
290 | if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, &optlen) < 0 || | |
31afdd22 | 291 | ioctl(sock, TIOCOUTQ, &outq) < 0 || |
3fdaaa8f JM |
292 | sndbuf <= 0 || outq < 0) |
293 | return 0; | |
294 | return outq > sndbuf / 2; | |
295 | #else /* __linux__ */ | |
296 | return 0; | |
297 | #endif /* __linux__ */ | |
298 | } | |
299 | ||
300 | ||
301 | static void wpas_ctrl_msg_send_pending_global(struct wpa_global *global) | |
302 | { | |
303 | struct ctrl_iface_global_priv *gpriv; | |
304 | struct ctrl_iface_msg *msg; | |
305 | ||
306 | gpriv = global->ctrl_iface; | |
307 | while (gpriv && !dl_list_empty(&gpriv->msg_queue) && | |
308 | !wpas_ctrl_iface_throttle(gpriv->sock)) { | |
309 | msg = dl_list_first(&gpriv->msg_queue, struct ctrl_iface_msg, | |
310 | list); | |
311 | if (!msg) | |
312 | break; | |
313 | dl_list_del(&msg->list); | |
314 | wpa_supplicant_ctrl_iface_send( | |
315 | msg->wpa_s, | |
316 | msg->type != WPA_MSG_PER_INTERFACE ? | |
317 | NULL : msg->wpa_s->ifname, | |
318 | gpriv->sock, &gpriv->ctrl_dst, msg->level, | |
319 | msg->txt, msg->len, NULL, gpriv); | |
320 | os_free(msg); | |
321 | } | |
322 | } | |
323 | ||
324 | ||
325 | static void wpas_ctrl_msg_send_pending_iface(struct wpa_supplicant *wpa_s) | |
326 | { | |
327 | struct ctrl_iface_priv *priv; | |
328 | struct ctrl_iface_msg *msg; | |
329 | ||
330 | priv = wpa_s->ctrl_iface; | |
331 | while (priv && !dl_list_empty(&priv->msg_queue) && | |
332 | !wpas_ctrl_iface_throttle(priv->sock)) { | |
333 | msg = dl_list_first(&priv->msg_queue, struct ctrl_iface_msg, | |
334 | list); | |
335 | if (!msg) | |
336 | break; | |
337 | dl_list_del(&msg->list); | |
338 | wpa_supplicant_ctrl_iface_send(wpa_s, NULL, priv->sock, | |
339 | &priv->ctrl_dst, msg->level, | |
340 | msg->txt, msg->len, priv, NULL); | |
341 | os_free(msg); | |
342 | } | |
343 | } | |
344 | ||
345 | ||
346 | static void wpas_ctrl_msg_queue_timeout(void *eloop_ctx, void *timeout_ctx) | |
347 | { | |
348 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
349 | struct ctrl_iface_priv *priv; | |
350 | struct ctrl_iface_global_priv *gpriv; | |
351 | int sock = -1, gsock = -1; | |
352 | ||
353 | wpas_ctrl_msg_send_pending_global(wpa_s->global); | |
354 | wpas_ctrl_msg_send_pending_iface(wpa_s); | |
355 | ||
356 | priv = wpa_s->ctrl_iface; | |
357 | if (priv && !dl_list_empty(&priv->msg_queue)) | |
358 | sock = priv->sock; | |
359 | ||
360 | gpriv = wpa_s->global->ctrl_iface; | |
361 | if (gpriv && !dl_list_empty(&gpriv->msg_queue)) | |
362 | gsock = gpriv->sock; | |
363 | ||
364 | if (sock > -1 || gsock > -1) { | |
365 | /* Continue pending message transmission from a timeout */ | |
366 | wpa_printf(MSG_MSGDUMP, | |
367 | "CTRL: Had to throttle pending event message transmission for (sock %d gsock %d)", | |
368 | sock, gsock); | |
369 | eloop_register_timeout(0, 20000, wpas_ctrl_msg_queue_timeout, | |
370 | wpa_s, NULL); | |
371 | } | |
372 | } | |
373 | ||
374 | ||
375 | static void wpas_ctrl_msg_queue(struct dl_list *queue, | |
376 | struct wpa_supplicant *wpa_s, int level, | |
377 | enum wpa_msg_type type, | |
378 | const char *txt, size_t len) | |
379 | { | |
380 | struct ctrl_iface_msg *msg; | |
381 | ||
382 | msg = os_zalloc(sizeof(*msg) + len); | |
383 | if (!msg) | |
384 | return; | |
385 | ||
386 | msg->wpa_s = wpa_s; | |
387 | msg->level = level; | |
388 | msg->type = type; | |
389 | os_memcpy(msg + 1, txt, len); | |
390 | msg->txt = (const char *) (msg + 1); | |
391 | msg->len = len; | |
392 | dl_list_add_tail(queue, &msg->list); | |
393 | eloop_cancel_timeout(wpas_ctrl_msg_queue_timeout, wpa_s, NULL); | |
394 | eloop_register_timeout(0, 0, wpas_ctrl_msg_queue_timeout, wpa_s, NULL); | |
395 | } | |
396 | ||
397 | ||
398 | static void wpas_ctrl_msg_queue_limit(unsigned int throttle_count, | |
399 | struct dl_list *queue) | |
400 | { | |
401 | struct ctrl_iface_msg *msg; | |
402 | ||
403 | if (throttle_count < 2000) | |
404 | return; | |
405 | ||
406 | msg = dl_list_first(queue, struct ctrl_iface_msg, list); | |
407 | if (msg) { | |
408 | wpa_printf(MSG_DEBUG, "CTRL: Dropped oldest pending message"); | |
409 | dl_list_del(&msg->list); | |
410 | os_free(msg); | |
411 | } | |
412 | } | |
413 | ||
414 | ||
995a3a06 JM |
415 | static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level, |
416 | enum wpa_msg_type type, | |
6fc6879b JM |
417 | const char *txt, size_t len) |
418 | { | |
419 | struct wpa_supplicant *wpa_s = ctx; | |
3fdaaa8f JM |
420 | struct ctrl_iface_priv *priv; |
421 | struct ctrl_iface_global_priv *gpriv; | |
214e428b JM |
422 | |
423 | if (wpa_s == NULL) | |
6fc6879b | 424 | return; |
214e428b | 425 | |
3fdaaa8f JM |
426 | gpriv = wpa_s->global->ctrl_iface; |
427 | ||
428 | if (type != WPA_MSG_NO_GLOBAL && gpriv && | |
429 | !dl_list_empty(&gpriv->ctrl_dst)) { | |
430 | if (!dl_list_empty(&gpriv->msg_queue) || | |
431 | wpas_ctrl_iface_throttle(gpriv->sock)) { | |
432 | if (gpriv->throttle_count == 0) { | |
433 | wpa_printf(MSG_MSGDUMP, | |
434 | "CTRL: Had to throttle global event message for sock %d", | |
435 | gpriv->sock); | |
436 | } | |
437 | gpriv->throttle_count++; | |
438 | wpas_ctrl_msg_queue_limit(gpriv->throttle_count, | |
439 | &gpriv->msg_queue); | |
440 | wpas_ctrl_msg_queue(&gpriv->msg_queue, wpa_s, level, | |
441 | type, txt, len); | |
442 | } else { | |
443 | if (gpriv->throttle_count) { | |
444 | wpa_printf(MSG_MSGDUMP, | |
445 | "CTRL: Had to throttle %u global event message(s) for sock %d", | |
446 | gpriv->throttle_count, gpriv->sock); | |
447 | } | |
448 | gpriv->throttle_count = 0; | |
995a3a06 JM |
449 | wpa_supplicant_ctrl_iface_send( |
450 | wpa_s, | |
ee1e3f57 AN |
451 | type != WPA_MSG_PER_INTERFACE ? |
452 | NULL : wpa_s->ifname, | |
3fdaaa8f JM |
453 | gpriv->sock, &gpriv->ctrl_dst, level, |
454 | txt, len, NULL, gpriv); | |
214e428b JM |
455 | } |
456 | } | |
457 | ||
3fdaaa8f JM |
458 | priv = wpa_s->ctrl_iface; |
459 | ||
460 | if (type != WPA_MSG_ONLY_GLOBAL && priv) { | |
461 | if (!dl_list_empty(&priv->msg_queue) || | |
462 | wpas_ctrl_iface_throttle(priv->sock)) { | |
463 | if (priv->throttle_count == 0) { | |
464 | wpa_printf(MSG_MSGDUMP, | |
465 | "CTRL: Had to throttle event message for sock %d", | |
466 | priv->sock); | |
467 | } | |
468 | priv->throttle_count++; | |
469 | wpas_ctrl_msg_queue_limit(priv->throttle_count, | |
470 | &priv->msg_queue); | |
471 | wpas_ctrl_msg_queue(&priv->msg_queue, wpa_s, level, | |
472 | type, txt, len); | |
473 | } else { | |
474 | if (priv->throttle_count) { | |
475 | wpa_printf(MSG_MSGDUMP, | |
476 | "CTRL: Had to throttle %u event message(s) for sock %d", | |
477 | priv->throttle_count, priv->sock); | |
478 | } | |
479 | priv->throttle_count = 0; | |
480 | wpa_supplicant_ctrl_iface_send(wpa_s, NULL, priv->sock, | |
481 | &priv->ctrl_dst, level, | |
482 | txt, len, priv, NULL); | |
483 | } | |
484 | } | |
6fc6879b JM |
485 | } |
486 | ||
487 | ||
89286e91 JM |
488 | static int wpas_ctrl_iface_open_sock(struct wpa_supplicant *wpa_s, |
489 | struct ctrl_iface_priv *priv) | |
6fc6879b | 490 | { |
6fc6879b JM |
491 | struct sockaddr_un addr; |
492 | char *fname = NULL; | |
493 | gid_t gid = 0; | |
494 | int gid_set = 0; | |
495 | char *buf, *dir = NULL, *gid_str = NULL; | |
496 | struct group *grp; | |
497 | char *endp; | |
4fdc8def | 498 | int flags; |
6fc6879b | 499 | |
6fc6879b JM |
500 | buf = os_strdup(wpa_s->conf->ctrl_interface); |
501 | if (buf == NULL) | |
502 | goto fail; | |
b3f3865e DS |
503 | #ifdef ANDROID |
504 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), "wpa_%s", | |
505 | wpa_s->conf->ctrl_interface); | |
506 | priv->sock = android_get_control_socket(addr.sun_path); | |
3a7414b6 NM |
507 | if (priv->sock >= 0) { |
508 | priv->android_control_socket = 1; | |
b3f3865e | 509 | goto havesock; |
3a7414b6 | 510 | } |
b3f3865e | 511 | #endif /* ANDROID */ |
6fc6879b JM |
512 | if (os_strncmp(buf, "DIR=", 4) == 0) { |
513 | dir = buf + 4; | |
514 | gid_str = os_strstr(dir, " GROUP="); | |
515 | if (gid_str) { | |
516 | *gid_str = '\0'; | |
517 | gid_str += 7; | |
518 | } | |
519 | } else { | |
520 | dir = buf; | |
521 | gid_str = wpa_s->conf->ctrl_interface_group; | |
522 | } | |
523 | ||
524 | if (mkdir(dir, S_IRWXU | S_IRWXG) < 0) { | |
525 | if (errno == EEXIST) { | |
526 | wpa_printf(MSG_DEBUG, "Using existing control " | |
527 | "interface directory."); | |
528 | } else { | |
2c6f8cf6 JM |
529 | wpa_printf(MSG_ERROR, "mkdir[ctrl_interface=%s]: %s", |
530 | dir, strerror(errno)); | |
6fc6879b JM |
531 | goto fail; |
532 | } | |
533 | } | |
534 | ||
d49ea682 JM |
535 | #ifdef ANDROID |
536 | /* | |
537 | * wpa_supplicant is started from /init.*.rc on Android and that seems | |
538 | * to be using umask 0077 which would leave the control interface | |
539 | * directory without group access. This breaks things since Wi-Fi | |
540 | * framework assumes that this directory can be accessed by other | |
541 | * applications in the wifi group. Fix this by adding group access even | |
542 | * if umask value would prevent this. | |
543 | */ | |
544 | if (chmod(dir, S_IRWXU | S_IRWXG) < 0) { | |
545 | wpa_printf(MSG_ERROR, "CTRL: Could not chmod directory: %s", | |
546 | strerror(errno)); | |
547 | /* Try to continue anyway */ | |
548 | } | |
549 | #endif /* ANDROID */ | |
550 | ||
6fc6879b JM |
551 | if (gid_str) { |
552 | grp = getgrnam(gid_str); | |
553 | if (grp) { | |
554 | gid = grp->gr_gid; | |
555 | gid_set = 1; | |
556 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d" | |
557 | " (from group name '%s')", | |
558 | (int) gid, gid_str); | |
559 | } else { | |
560 | /* Group name not found - try to parse this as gid */ | |
561 | gid = strtol(gid_str, &endp, 10); | |
562 | if (*gid_str == '\0' || *endp != '\0') { | |
8e888179 | 563 | wpa_printf(MSG_ERROR, "CTRL: Invalid group " |
6fc6879b JM |
564 | "'%s'", gid_str); |
565 | goto fail; | |
566 | } | |
567 | gid_set = 1; | |
568 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d", | |
569 | (int) gid); | |
570 | } | |
571 | } | |
572 | ||
02f52ab6 JM |
573 | if (gid_set && lchown(dir, -1, gid) < 0) { |
574 | wpa_printf(MSG_ERROR, "lchown[ctrl_interface=%s,gid=%d]: %s", | |
2c6f8cf6 | 575 | dir, (int) gid, strerror(errno)); |
6fc6879b JM |
576 | goto fail; |
577 | } | |
578 | ||
3fd2a226 AAS |
579 | /* Make sure the group can enter and read the directory */ |
580 | if (gid_set && | |
581 | chmod(dir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP) < 0) { | |
582 | wpa_printf(MSG_ERROR, "CTRL: chmod[ctrl_interface]: %s", | |
583 | strerror(errno)); | |
584 | goto fail; | |
585 | } | |
586 | ||
6fc6879b JM |
587 | if (os_strlen(dir) + 1 + os_strlen(wpa_s->ifname) >= |
588 | sizeof(addr.sun_path)) { | |
589 | wpa_printf(MSG_ERROR, "ctrl_iface path limit exceeded"); | |
590 | goto fail; | |
591 | } | |
592 | ||
593 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
594 | if (priv->sock < 0) { | |
2c6f8cf6 | 595 | wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); |
6fc6879b JM |
596 | goto fail; |
597 | } | |
598 | ||
599 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 600 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
601 | addr.sun_len = sizeof(addr); |
602 | #endif /* __FreeBSD__ */ | |
6fc6879b JM |
603 | addr.sun_family = AF_UNIX; |
604 | fname = wpa_supplicant_ctrl_iface_path(wpa_s); | |
605 | if (fname == NULL) | |
606 | goto fail; | |
607 | os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path)); | |
608 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
609 | wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s", | |
610 | strerror(errno)); | |
611 | if (connect(priv->sock, (struct sockaddr *) &addr, | |
612 | sizeof(addr)) < 0) { | |
613 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
614 | " allow connections - assuming it was left" | |
615 | "over from forced program termination"); | |
616 | if (unlink(fname) < 0) { | |
2c6f8cf6 JM |
617 | wpa_printf(MSG_ERROR, |
618 | "Could not unlink existing ctrl_iface socket '%s': %s", | |
619 | fname, strerror(errno)); | |
6fc6879b JM |
620 | goto fail; |
621 | } | |
622 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
623 | sizeof(addr)) < 0) { | |
2c6f8cf6 JM |
624 | wpa_printf(MSG_ERROR, "supp-ctrl-iface-init: bind(PF_UNIX): %s", |
625 | strerror(errno)); | |
6fc6879b JM |
626 | goto fail; |
627 | } | |
628 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
629 | "ctrl_iface socket '%s'", fname); | |
630 | } else { | |
631 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
632 | "be in use - cannot override it"); | |
633 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
634 | "not used anymore", fname); | |
635 | os_free(fname); | |
636 | fname = NULL; | |
637 | goto fail; | |
638 | } | |
639 | } | |
640 | ||
02f52ab6 JM |
641 | if (gid_set && lchown(fname, -1, gid) < 0) { |
642 | wpa_printf(MSG_ERROR, "lchown[ctrl_interface=%s,gid=%d]: %s", | |
2c6f8cf6 | 643 | fname, (int) gid, strerror(errno)); |
6fc6879b JM |
644 | goto fail; |
645 | } | |
646 | ||
647 | if (chmod(fname, S_IRWXU | S_IRWXG) < 0) { | |
2c6f8cf6 JM |
648 | wpa_printf(MSG_ERROR, "chmod[ctrl_interface=%s]: %s", |
649 | fname, strerror(errno)); | |
6fc6879b JM |
650 | goto fail; |
651 | } | |
652 | os_free(fname); | |
653 | ||
b3f3865e DS |
654 | #ifdef ANDROID |
655 | havesock: | |
656 | #endif /* ANDROID */ | |
4fdc8def BG |
657 | |
658 | /* | |
659 | * Make socket non-blocking so that we don't hang forever if | |
660 | * target dies unexpectedly. | |
661 | */ | |
662 | flags = fcntl(priv->sock, F_GETFL); | |
663 | if (flags >= 0) { | |
664 | flags |= O_NONBLOCK; | |
665 | if (fcntl(priv->sock, F_SETFL, flags) < 0) { | |
2c6f8cf6 JM |
666 | wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s", |
667 | strerror(errno)); | |
4fdc8def BG |
668 | /* Not fatal, continue on.*/ |
669 | } | |
670 | } | |
671 | ||
6fc6879b JM |
672 | eloop_register_read_sock(priv->sock, wpa_supplicant_ctrl_iface_receive, |
673 | wpa_s, priv); | |
674 | wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb); | |
675 | ||
676 | os_free(buf); | |
89286e91 | 677 | return 0; |
6fc6879b JM |
678 | |
679 | fail: | |
89286e91 | 680 | if (priv->sock >= 0) { |
6fc6879b | 681 | close(priv->sock); |
89286e91 JM |
682 | priv->sock = -1; |
683 | } | |
6fc6879b JM |
684 | if (fname) { |
685 | unlink(fname); | |
686 | os_free(fname); | |
687 | } | |
688 | os_free(buf); | |
89286e91 JM |
689 | return -1; |
690 | } | |
691 | ||
692 | ||
693 | struct ctrl_iface_priv * | |
694 | wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s) | |
695 | { | |
696 | struct ctrl_iface_priv *priv; | |
697 | ||
698 | priv = os_zalloc(sizeof(*priv)); | |
699 | if (priv == NULL) | |
700 | return NULL; | |
701 | dl_list_init(&priv->ctrl_dst); | |
3fdaaa8f | 702 | dl_list_init(&priv->msg_queue); |
89286e91 JM |
703 | priv->wpa_s = wpa_s; |
704 | priv->sock = -1; | |
705 | ||
706 | if (wpa_s->conf->ctrl_interface == NULL) | |
707 | return priv; | |
708 | ||
c9cfa6a9 SD |
709 | #ifdef ANDROID |
710 | if (wpa_s->global->params.ctrl_interface) { | |
711 | int same = 0; | |
712 | ||
713 | if (wpa_s->global->params.ctrl_interface[0] == '/') { | |
714 | if (os_strcmp(wpa_s->global->params.ctrl_interface, | |
715 | wpa_s->conf->ctrl_interface) == 0) | |
716 | same = 1; | |
717 | } else if (os_strncmp(wpa_s->global->params.ctrl_interface, | |
718 | "@android:", 9) == 0 || | |
719 | os_strncmp(wpa_s->global->params.ctrl_interface, | |
720 | "@abstract:", 10) == 0) { | |
721 | char *pos; | |
722 | ||
723 | /* | |
724 | * Currently, Android uses @android:wpa_* as the naming | |
725 | * convention for the global ctrl interface. This logic | |
726 | * needs to be revisited if the above naming convention | |
727 | * is modified. | |
728 | */ | |
729 | pos = os_strchr(wpa_s->global->params.ctrl_interface, | |
730 | '_'); | |
731 | if (pos && | |
732 | os_strcmp(pos + 1, | |
733 | wpa_s->conf->ctrl_interface) == 0) | |
734 | same = 1; | |
735 | } | |
736 | ||
737 | if (same) { | |
738 | /* | |
739 | * The invalid configuration combination might be | |
740 | * possible to hit in an Android OTA upgrade case, so | |
741 | * instead of refusing to start the wpa_supplicant | |
742 | * process, do not open the per-interface ctrl_iface | |
743 | * and continue with the global control interface that | |
744 | * was set from the command line since the Wi-Fi | |
745 | * framework will use it for operations. | |
746 | */ | |
747 | wpa_printf(MSG_ERROR, | |
748 | "global ctrl interface %s matches ctrl interface %s - do not open per-interface ctrl interface", | |
749 | wpa_s->global->params.ctrl_interface, | |
750 | wpa_s->conf->ctrl_interface); | |
751 | return priv; | |
752 | } | |
753 | } | |
754 | #endif /* ANDROID */ | |
755 | ||
89286e91 JM |
756 | if (wpas_ctrl_iface_open_sock(wpa_s, priv) < 0) { |
757 | os_free(priv); | |
758 | return NULL; | |
759 | } | |
760 | ||
761 | return priv; | |
762 | } | |
763 | ||
764 | ||
765 | static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s, | |
766 | struct ctrl_iface_priv *priv) | |
767 | { | |
768 | int res; | |
769 | ||
770 | if (priv->sock <= 0) | |
771 | return -1; | |
772 | ||
3a7414b6 NM |
773 | /* |
774 | * On Android, the control socket being used may be the socket | |
775 | * that is created when wpa_supplicant is started as a /init.*.rc | |
776 | * service. Such a socket is maintained as a key-value pair in | |
777 | * Android's environment. Closing this control socket would leave us | |
778 | * in a bad state with an invalid socket descriptor. | |
779 | */ | |
780 | if (priv->android_control_socket) | |
781 | return priv->sock; | |
782 | ||
89286e91 JM |
783 | eloop_unregister_read_sock(priv->sock); |
784 | close(priv->sock); | |
785 | priv->sock = -1; | |
786 | res = wpas_ctrl_iface_open_sock(wpa_s, priv); | |
787 | if (res < 0) | |
788 | return -1; | |
789 | return priv->sock; | |
6fc6879b JM |
790 | } |
791 | ||
792 | ||
793 | void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv) | |
794 | { | |
795 | struct wpa_ctrl_dst *dst, *prev; | |
3fdaaa8f JM |
796 | struct ctrl_iface_msg *msg, *prev_msg; |
797 | struct ctrl_iface_global_priv *gpriv; | |
6fc6879b JM |
798 | |
799 | if (priv->sock > -1) { | |
800 | char *fname; | |
6ed626df | 801 | char *buf, *dir = NULL; |
6fc6879b | 802 | eloop_unregister_read_sock(priv->sock); |
09e47a07 | 803 | if (!dl_list_empty(&priv->ctrl_dst)) { |
6fc6879b | 804 | /* |
e0591c3c | 805 | * Wait before closing the control socket if |
6fc6879b JM |
806 | * there are any attached monitors in order to allow |
807 | * them to receive any pending messages. | |
808 | */ | |
809 | wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached " | |
810 | "monitors to receive messages"); | |
e0591c3c | 811 | os_sleep(0, 100000); |
6fc6879b JM |
812 | } |
813 | close(priv->sock); | |
814 | priv->sock = -1; | |
815 | fname = wpa_supplicant_ctrl_iface_path(priv->wpa_s); | |
816 | if (fname) { | |
817 | unlink(fname); | |
818 | os_free(fname); | |
819 | } | |
820 | ||
ea61aa1d JM |
821 | if (priv->wpa_s->conf->ctrl_interface == NULL) |
822 | goto free_dst; | |
6fc6879b JM |
823 | buf = os_strdup(priv->wpa_s->conf->ctrl_interface); |
824 | if (buf == NULL) | |
825 | goto free_dst; | |
826 | if (os_strncmp(buf, "DIR=", 4) == 0) { | |
6ed626df | 827 | char *gid_str; |
6fc6879b JM |
828 | dir = buf + 4; |
829 | gid_str = os_strstr(dir, " GROUP="); | |
6ed626df | 830 | if (gid_str) |
6fc6879b | 831 | *gid_str = '\0'; |
6fc6879b JM |
832 | } else |
833 | dir = buf; | |
834 | ||
835 | if (rmdir(dir) < 0) { | |
836 | if (errno == ENOTEMPTY) { | |
837 | wpa_printf(MSG_DEBUG, "Control interface " | |
838 | "directory not empty - leaving it " | |
839 | "behind"); | |
840 | } else { | |
2c6f8cf6 JM |
841 | wpa_printf(MSG_ERROR, |
842 | "rmdir[ctrl_interface=%s]: %s", | |
843 | dir, strerror(errno)); | |
6fc6879b JM |
844 | } |
845 | } | |
846 | os_free(buf); | |
847 | } | |
848 | ||
849 | free_dst: | |
09e47a07 | 850 | dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst, |
12ea4cff JM |
851 | list) { |
852 | dl_list_del(&dst->list); | |
09e47a07 | 853 | os_free(dst); |
12ea4cff | 854 | } |
3fdaaa8f JM |
855 | dl_list_for_each_safe(msg, prev_msg, &priv->msg_queue, |
856 | struct ctrl_iface_msg, list) { | |
857 | dl_list_del(&msg->list); | |
858 | os_free(msg); | |
859 | } | |
860 | gpriv = priv->wpa_s->global->ctrl_iface; | |
861 | if (gpriv) { | |
862 | dl_list_for_each_safe(msg, prev_msg, &gpriv->msg_queue, | |
863 | struct ctrl_iface_msg, list) { | |
864 | if (msg->wpa_s == priv->wpa_s) { | |
865 | dl_list_del(&msg->list); | |
866 | os_free(msg); | |
867 | } | |
868 | } | |
869 | } | |
870 | eloop_cancel_timeout(wpas_ctrl_msg_queue_timeout, priv->wpa_s, NULL); | |
6fc6879b JM |
871 | os_free(priv); |
872 | } | |
873 | ||
874 | ||
875 | /** | |
876 | * wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors | |
214e428b JM |
877 | * @ifname: Interface name for global control socket or %NULL |
878 | * @sock: Local socket fd | |
879 | * @ctrl_dst: List of attached listeners | |
6fc6879b JM |
880 | * @level: Priority level of the message |
881 | * @buf: Message data | |
882 | * @len: Message length | |
883 | * | |
884 | * Send a packet to all monitor programs attached to the control interface. | |
885 | */ | |
89286e91 JM |
886 | static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s, |
887 | const char *ifname, int sock, | |
214e428b | 888 | struct dl_list *ctrl_dst, |
6fc6879b | 889 | int level, const char *buf, |
89286e91 JM |
890 | size_t len, |
891 | struct ctrl_iface_priv *priv, | |
892 | struct ctrl_iface_global_priv *gp) | |
6fc6879b JM |
893 | { |
894 | struct wpa_ctrl_dst *dst, *next; | |
895 | char levelstr[10]; | |
896 | int idx, res; | |
897 | struct msghdr msg; | |
214e428b | 898 | struct iovec io[5]; |
6fc6879b | 899 | |
214e428b | 900 | if (sock < 0 || dl_list_empty(ctrl_dst)) |
6fc6879b JM |
901 | return; |
902 | ||
903 | res = os_snprintf(levelstr, sizeof(levelstr), "<%d>", level); | |
d85e1fc8 | 904 | if (os_snprintf_error(sizeof(levelstr), res)) |
6fc6879b | 905 | return; |
214e428b JM |
906 | idx = 0; |
907 | if (ifname) { | |
908 | io[idx].iov_base = "IFNAME="; | |
909 | io[idx].iov_len = 7; | |
910 | idx++; | |
911 | io[idx].iov_base = (char *) ifname; | |
912 | io[idx].iov_len = os_strlen(ifname); | |
913 | idx++; | |
914 | io[idx].iov_base = " "; | |
915 | io[idx].iov_len = 1; | |
916 | idx++; | |
917 | } | |
918 | io[idx].iov_base = levelstr; | |
919 | io[idx].iov_len = os_strlen(levelstr); | |
920 | idx++; | |
921 | io[idx].iov_base = (char *) buf; | |
922 | io[idx].iov_len = len; | |
923 | idx++; | |
6fc6879b JM |
924 | os_memset(&msg, 0, sizeof(msg)); |
925 | msg.msg_iov = io; | |
214e428b | 926 | msg.msg_iovlen = idx; |
6fc6879b | 927 | |
214e428b | 928 | dl_list_for_each_safe(dst, next, ctrl_dst, struct wpa_ctrl_dst, list) { |
89286e91 | 929 | int _errno; |
acf57fae | 930 | char txt[200]; |
89286e91 | 931 | |
89286e91 JM |
932 | if (level < dst->debug_level) |
933 | continue; | |
934 | ||
89286e91 JM |
935 | msg.msg_name = (void *) &dst->addr; |
936 | msg.msg_namelen = dst->addrlen; | |
2e95cfc1 | 937 | wpas_ctrl_sock_debug("ctrl_sock-sendmsg", sock, buf, len); |
89286e91 | 938 | if (sendmsg(sock, &msg, MSG_DONTWAIT) >= 0) { |
acf57fae JD |
939 | sockaddr_print(MSG_MSGDUMP, |
940 | "CTRL_IFACE monitor sent successfully to", | |
941 | &dst->addr, dst->addrlen); | |
89286e91 | 942 | dst->errors = 0; |
89286e91 JM |
943 | continue; |
944 | } | |
945 | ||
946 | _errno = errno; | |
acf57fae JD |
947 | os_snprintf(txt, sizeof(txt), "CTRL_IFACE monitor: %d (%s) for", |
948 | _errno, strerror(_errno)); | |
949 | sockaddr_print(MSG_DEBUG, txt, &dst->addr, dst->addrlen); | |
89286e91 JM |
950 | dst->errors++; |
951 | ||
952 | if (dst->errors > 10 || _errno == ENOENT || _errno == EPERM) { | |
acf57fae JD |
953 | sockaddr_print(MSG_INFO, "CTRL_IFACE: Detach monitor that cannot receive messages:", |
954 | &dst->addr, dst->addrlen); | |
89286e91 JM |
955 | wpa_supplicant_ctrl_iface_detach(ctrl_dst, &dst->addr, |
956 | dst->addrlen); | |
957 | } | |
958 | ||
959 | if (_errno == ENOBUFS || _errno == EAGAIN) { | |
960 | /* | |
961 | * The socket send buffer could be full. This may happen | |
962 | * if client programs are not receiving their pending | |
963 | * messages. Close and reopen the socket as a workaround | |
964 | * to avoid getting stuck being unable to send any new | |
965 | * responses. | |
966 | */ | |
967 | if (priv) | |
968 | sock = wpas_ctrl_iface_reinit(wpa_s, priv); | |
969 | else if (gp) | |
970 | sock = wpas_ctrl_iface_global_reinit( | |
971 | wpa_s->global, gp); | |
972 | else | |
973 | break; | |
974 | if (sock < 0) { | |
975 | wpa_dbg(wpa_s, MSG_DEBUG, | |
976 | "Failed to reinitialize ctrl_iface socket"); | |
29179b88 | 977 | break; |
89286e91 JM |
978 | } |
979 | } | |
6fc6879b JM |
980 | } |
981 | } | |
982 | ||
983 | ||
984 | void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv) | |
985 | { | |
986 | char buf[256]; | |
987 | int res; | |
acf57fae | 988 | struct sockaddr_storage from; |
6fc6879b JM |
989 | socklen_t fromlen = sizeof(from); |
990 | ||
1c94570f IP |
991 | if (priv->sock == -1) |
992 | return; | |
993 | ||
6fc6879b JM |
994 | for (;;) { |
995 | wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor to " | |
996 | "attach", priv->wpa_s->ifname); | |
997 | eloop_wait_for_read_sock(priv->sock); | |
998 | ||
999 | res = recvfrom(priv->sock, buf, sizeof(buf) - 1, 0, | |
1000 | (struct sockaddr *) &from, &fromlen); | |
1001 | if (res < 0) { | |
2c6f8cf6 JM |
1002 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
1003 | strerror(errno)); | |
6fc6879b JM |
1004 | continue; |
1005 | } | |
1006 | buf[res] = '\0'; | |
1007 | ||
1008 | if (os_strcmp(buf, "ATTACH") == 0) { | |
1009 | /* handle ATTACH signal of first monitor interface */ | |
214e428b | 1010 | if (!wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, |
0efcad2c JM |
1011 | &from, fromlen, |
1012 | 0)) { | |
79986bf6 JM |
1013 | if (sendto(priv->sock, "OK\n", 3, 0, |
1014 | (struct sockaddr *) &from, fromlen) < | |
1015 | 0) { | |
1016 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
1017 | strerror(errno)); | |
1018 | } | |
6fc6879b JM |
1019 | /* OK to continue */ |
1020 | return; | |
1021 | } else { | |
79986bf6 JM |
1022 | if (sendto(priv->sock, "FAIL\n", 5, 0, |
1023 | (struct sockaddr *) &from, fromlen) < | |
1024 | 0) { | |
1025 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
1026 | strerror(errno)); | |
1027 | } | |
6fc6879b JM |
1028 | } |
1029 | } else { | |
1030 | /* return FAIL for all other signals */ | |
79986bf6 JM |
1031 | if (sendto(priv->sock, "FAIL\n", 5, 0, |
1032 | (struct sockaddr *) &from, fromlen) < 0) { | |
1033 | wpa_printf(MSG_DEBUG, | |
1034 | "ctrl_iface sendto failed: %s", | |
1035 | strerror(errno)); | |
1036 | } | |
6fc6879b JM |
1037 | } |
1038 | } | |
1039 | } | |
1040 | ||
1041 | ||
1042 | /* Global ctrl_iface */ | |
1043 | ||
6fc6879b JM |
1044 | static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx, |
1045 | void *sock_ctx) | |
1046 | { | |
1047 | struct wpa_global *global = eloop_ctx; | |
214e428b | 1048 | struct ctrl_iface_global_priv *priv = sock_ctx; |
8615bdfa | 1049 | char buf[4096]; |
6fc6879b | 1050 | int res; |
acf57fae | 1051 | struct sockaddr_storage from; |
6fc6879b | 1052 | socklen_t fromlen = sizeof(from); |
742e715b | 1053 | char *reply = NULL, *reply_buf = NULL; |
6fc6879b JM |
1054 | size_t reply_len; |
1055 | ||
1056 | res = recvfrom(sock, buf, sizeof(buf) - 1, 0, | |
1057 | (struct sockaddr *) &from, &fromlen); | |
1058 | if (res < 0) { | |
2c6f8cf6 JM |
1059 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
1060 | strerror(errno)); | |
6fc6879b JM |
1061 | return; |
1062 | } | |
1063 | buf[res] = '\0'; | |
1064 | ||
214e428b JM |
1065 | if (os_strcmp(buf, "ATTACH") == 0) { |
1066 | if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from, | |
0efcad2c | 1067 | fromlen, 1)) |
214e428b JM |
1068 | reply_len = 1; |
1069 | else | |
1070 | reply_len = 2; | |
1071 | } else if (os_strcmp(buf, "DETACH") == 0) { | |
1072 | if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from, | |
1073 | fromlen)) | |
1074 | reply_len = 1; | |
1075 | else | |
1076 | reply_len = 2; | |
1077 | } else { | |
742e715b JM |
1078 | reply_buf = wpa_supplicant_global_ctrl_iface_process( |
1079 | global, buf, &reply_len); | |
1080 | reply = reply_buf; | |
14fd0331 JM |
1081 | |
1082 | /* | |
1083 | * There could be some password/key material in the command, so | |
1084 | * clear the buffer explicitly now that it is not needed | |
1085 | * anymore. | |
1086 | */ | |
1087 | os_memset(buf, 0, res); | |
742e715b JM |
1088 | } |
1089 | ||
1090 | if (!reply && reply_len == 1) { | |
1091 | reply = "FAIL\n"; | |
1092 | reply_len = 5; | |
1093 | } else if (!reply && reply_len == 2) { | |
1094 | reply = "OK\n"; | |
1095 | reply_len = 3; | |
214e428b | 1096 | } |
6fc6879b JM |
1097 | |
1098 | if (reply) { | |
2e95cfc1 JM |
1099 | wpas_ctrl_sock_debug("global_ctrl_sock-sendto", |
1100 | sock, reply, reply_len); | |
79986bf6 JM |
1101 | if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, |
1102 | fromlen) < 0) { | |
1103 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
1104 | strerror(errno)); | |
1105 | } | |
6fc6879b | 1106 | } |
742e715b | 1107 | os_free(reply_buf); |
6fc6879b JM |
1108 | } |
1109 | ||
1110 | ||
89286e91 JM |
1111 | static int wpas_global_ctrl_iface_open_sock(struct wpa_global *global, |
1112 | struct ctrl_iface_global_priv *priv) | |
6fc6879b | 1113 | { |
6fc6879b | 1114 | struct sockaddr_un addr; |
d2a9e2c7 | 1115 | const char *ctrl = global->params.ctrl_interface; |
8d6e0350 | 1116 | int flags; |
6fc6879b | 1117 | |
d2a9e2c7 JM |
1118 | wpa_printf(MSG_DEBUG, "Global control interface '%s'", ctrl); |
1119 | ||
b3f3865e | 1120 | #ifdef ANDROID |
d2a9e2c7 JM |
1121 | if (os_strncmp(ctrl, "@android:", 9) == 0) { |
1122 | priv->sock = android_get_control_socket(ctrl + 9); | |
1123 | if (priv->sock < 0) { | |
1124 | wpa_printf(MSG_ERROR, "Failed to open Android control " | |
1125 | "socket '%s'", ctrl + 9); | |
1126 | goto fail; | |
1127 | } | |
1128 | wpa_printf(MSG_DEBUG, "Using Android control socket '%s'", | |
1129 | ctrl + 9); | |
3a7414b6 | 1130 | priv->android_control_socket = 1; |
b3f3865e | 1131 | goto havesock; |
d2a9e2c7 | 1132 | } |
b3f3865e | 1133 | |
d2a9e2c7 JM |
1134 | if (os_strncmp(ctrl, "@abstract:", 10) != 0) { |
1135 | /* | |
1136 | * Backwards compatibility - try to open an Android control | |
1137 | * socket and if that fails, assume this was a UNIX domain | |
1138 | * socket instead. | |
1139 | */ | |
1140 | priv->sock = android_get_control_socket(ctrl); | |
1141 | if (priv->sock >= 0) { | |
1142 | wpa_printf(MSG_DEBUG, | |
1143 | "Using Android control socket '%s'", | |
1144 | ctrl); | |
3a7414b6 | 1145 | priv->android_control_socket = 1; |
d2a9e2c7 JM |
1146 | goto havesock; |
1147 | } | |
1148 | } | |
1149 | #endif /* ANDROID */ | |
6fc6879b JM |
1150 | |
1151 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
1152 | if (priv->sock < 0) { | |
2c6f8cf6 | 1153 | wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); |
6fc6879b JM |
1154 | goto fail; |
1155 | } | |
1156 | ||
1157 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 1158 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
1159 | addr.sun_len = sizeof(addr); |
1160 | #endif /* __FreeBSD__ */ | |
6fc6879b | 1161 | addr.sun_family = AF_UNIX; |
d2a9e2c7 JM |
1162 | |
1163 | if (os_strncmp(ctrl, "@abstract:", 10) == 0) { | |
1164 | addr.sun_path[0] = '\0'; | |
1165 | os_strlcpy(addr.sun_path + 1, ctrl + 10, | |
1166 | sizeof(addr.sun_path) - 1); | |
1167 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < | |
1168 | 0) { | |
1169 | wpa_printf(MSG_ERROR, "supp-global-ctrl-iface-init: " | |
2c6f8cf6 JM |
1170 | "bind(PF_UNIX;%s) failed: %s", |
1171 | ctrl, strerror(errno)); | |
d2a9e2c7 JM |
1172 | goto fail; |
1173 | } | |
1174 | wpa_printf(MSG_DEBUG, "Using Abstract control socket '%s'", | |
1175 | ctrl + 10); | |
1176 | goto havesock; | |
1177 | } | |
1178 | ||
1179 | os_strlcpy(addr.sun_path, ctrl, sizeof(addr.sun_path)); | |
6fc6879b | 1180 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
2c6f8cf6 JM |
1181 | wpa_printf(MSG_INFO, "supp-global-ctrl-iface-init(%s) (will try fixup): bind(PF_UNIX): %s", |
1182 | ctrl, strerror(errno)); | |
6fc6879b JM |
1183 | if (connect(priv->sock, (struct sockaddr *) &addr, |
1184 | sizeof(addr)) < 0) { | |
1185 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
1186 | " allow connections - assuming it was left" | |
1187 | "over from forced program termination"); | |
d2a9e2c7 | 1188 | if (unlink(ctrl) < 0) { |
2c6f8cf6 JM |
1189 | wpa_printf(MSG_ERROR, |
1190 | "Could not unlink existing ctrl_iface socket '%s': %s", | |
1191 | ctrl, strerror(errno)); | |
6fc6879b JM |
1192 | goto fail; |
1193 | } | |
1194 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
1195 | sizeof(addr)) < 0) { | |
2c6f8cf6 JM |
1196 | wpa_printf(MSG_ERROR, "supp-glb-iface-init: bind(PF_UNIX;%s): %s", |
1197 | ctrl, strerror(errno)); | |
6fc6879b JM |
1198 | goto fail; |
1199 | } | |
1200 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
1201 | "ctrl_iface socket '%s'", | |
d2a9e2c7 | 1202 | ctrl); |
6fc6879b JM |
1203 | } else { |
1204 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
1205 | "be in use - cannot override it"); | |
1206 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
1207 | "not used anymore", | |
d2a9e2c7 | 1208 | ctrl); |
6fc6879b JM |
1209 | goto fail; |
1210 | } | |
1211 | } | |
1212 | ||
d2a9e2c7 JM |
1213 | wpa_printf(MSG_DEBUG, "Using UNIX control socket '%s'", ctrl); |
1214 | ||
29257565 JM |
1215 | if (global->params.ctrl_interface_group) { |
1216 | char *gid_str = global->params.ctrl_interface_group; | |
1217 | gid_t gid = 0; | |
1218 | struct group *grp; | |
1219 | char *endp; | |
1220 | ||
1221 | grp = getgrnam(gid_str); | |
1222 | if (grp) { | |
1223 | gid = grp->gr_gid; | |
1224 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d" | |
1225 | " (from group name '%s')", | |
1226 | (int) gid, gid_str); | |
1227 | } else { | |
1228 | /* Group name not found - try to parse this as gid */ | |
1229 | gid = strtol(gid_str, &endp, 10); | |
1230 | if (*gid_str == '\0' || *endp != '\0') { | |
1231 | wpa_printf(MSG_ERROR, "CTRL: Invalid group " | |
1232 | "'%s'", gid_str); | |
1233 | goto fail; | |
1234 | } | |
1235 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d", | |
1236 | (int) gid); | |
1237 | } | |
02f52ab6 | 1238 | if (lchown(ctrl, -1, gid) < 0) { |
2c6f8cf6 | 1239 | wpa_printf(MSG_ERROR, |
02f52ab6 | 1240 | "lchown[global_ctrl_interface=%s,gid=%d]: %s", |
2c6f8cf6 | 1241 | ctrl, (int) gid, strerror(errno)); |
29257565 JM |
1242 | goto fail; |
1243 | } | |
1244 | ||
d2a9e2c7 | 1245 | if (chmod(ctrl, S_IRWXU | S_IRWXG) < 0) { |
2c6f8cf6 JM |
1246 | wpa_printf(MSG_ERROR, |
1247 | "chmod[global_ctrl_interface=%s]: %s", | |
1248 | ctrl, strerror(errno)); | |
29257565 JM |
1249 | goto fail; |
1250 | } | |
d2a9e2c7 | 1251 | } else { |
f62415df JM |
1252 | if (chmod(ctrl, S_IRWXU) < 0) { |
1253 | wpa_printf(MSG_DEBUG, | |
1254 | "chmod[global_ctrl_interface=%s](S_IRWXU): %s", | |
1255 | ctrl, strerror(errno)); | |
1256 | /* continue anyway since group change was not required | |
1257 | */ | |
1258 | } | |
29257565 JM |
1259 | } |
1260 | ||
b3f3865e | 1261 | havesock: |
8d6e0350 JM |
1262 | |
1263 | /* | |
1264 | * Make socket non-blocking so that we don't hang forever if | |
1265 | * target dies unexpectedly. | |
1266 | */ | |
1267 | flags = fcntl(priv->sock, F_GETFL); | |
1268 | if (flags >= 0) { | |
1269 | flags |= O_NONBLOCK; | |
1270 | if (fcntl(priv->sock, F_SETFL, flags) < 0) { | |
2c6f8cf6 JM |
1271 | wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s", |
1272 | strerror(errno)); | |
8d6e0350 JM |
1273 | /* Not fatal, continue on.*/ |
1274 | } | |
1275 | } | |
1276 | ||
6fc6879b JM |
1277 | eloop_register_read_sock(priv->sock, |
1278 | wpa_supplicant_global_ctrl_iface_receive, | |
214e428b | 1279 | global, priv); |
6fc6879b | 1280 | |
89286e91 | 1281 | return 0; |
6fc6879b JM |
1282 | |
1283 | fail: | |
89286e91 | 1284 | if (priv->sock >= 0) { |
6fc6879b | 1285 | close(priv->sock); |
89286e91 JM |
1286 | priv->sock = -1; |
1287 | } | |
1288 | return -1; | |
1289 | } | |
1290 | ||
1291 | ||
1292 | struct ctrl_iface_global_priv * | |
1293 | wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global) | |
1294 | { | |
1295 | struct ctrl_iface_global_priv *priv; | |
1296 | ||
1297 | priv = os_zalloc(sizeof(*priv)); | |
1298 | if (priv == NULL) | |
1299 | return NULL; | |
1300 | dl_list_init(&priv->ctrl_dst); | |
3fdaaa8f | 1301 | dl_list_init(&priv->msg_queue); |
89286e91 JM |
1302 | priv->global = global; |
1303 | priv->sock = -1; | |
1304 | ||
1305 | if (global->params.ctrl_interface == NULL) | |
1306 | return priv; | |
1307 | ||
1308 | if (wpas_global_ctrl_iface_open_sock(global, priv) < 0) { | |
1309 | os_free(priv); | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
76fe79ef JM |
1313 | wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb); |
1314 | ||
89286e91 JM |
1315 | return priv; |
1316 | } | |
1317 | ||
1318 | ||
1319 | static int wpas_ctrl_iface_global_reinit(struct wpa_global *global, | |
1320 | struct ctrl_iface_global_priv *priv) | |
1321 | { | |
1322 | int res; | |
1323 | ||
1324 | if (priv->sock <= 0) | |
1325 | return -1; | |
1326 | ||
3a7414b6 NM |
1327 | /* |
1328 | * On Android, the control socket being used may be the socket | |
1329 | * that is created when wpa_supplicant is started as a /init.*.rc | |
1330 | * service. Such a socket is maintained as a key-value pair in | |
1331 | * Android's environment. Closing this control socket would leave us | |
1332 | * in a bad state with an invalid socket descriptor. | |
1333 | */ | |
1334 | if (priv->android_control_socket) | |
1335 | return priv->sock; | |
1336 | ||
89286e91 JM |
1337 | eloop_unregister_read_sock(priv->sock); |
1338 | close(priv->sock); | |
1339 | priv->sock = -1; | |
1340 | res = wpas_global_ctrl_iface_open_sock(global, priv); | |
1341 | if (res < 0) | |
1342 | return -1; | |
1343 | return priv->sock; | |
6fc6879b JM |
1344 | } |
1345 | ||
1346 | ||
1347 | void | |
1348 | wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv) | |
1349 | { | |
214e428b | 1350 | struct wpa_ctrl_dst *dst, *prev; |
3fdaaa8f | 1351 | struct ctrl_iface_msg *msg, *prev_msg; |
214e428b | 1352 | |
6fc6879b JM |
1353 | if (priv->sock >= 0) { |
1354 | eloop_unregister_read_sock(priv->sock); | |
1355 | close(priv->sock); | |
1356 | } | |
1357 | if (priv->global->params.ctrl_interface) | |
1358 | unlink(priv->global->params.ctrl_interface); | |
214e428b | 1359 | dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst, |
12ea4cff JM |
1360 | list) { |
1361 | dl_list_del(&dst->list); | |
214e428b | 1362 | os_free(dst); |
12ea4cff | 1363 | } |
3fdaaa8f JM |
1364 | dl_list_for_each_safe(msg, prev_msg, &priv->msg_queue, |
1365 | struct ctrl_iface_msg, list) { | |
1366 | dl_list_del(&msg->list); | |
1367 | os_free(msg); | |
1368 | } | |
6fc6879b JM |
1369 | os_free(priv); |
1370 | } |