]>
Commit | Line | Data |
---|---|---|
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> | |
18 | #include <linux/sockios.h> | |
19 | #endif /* __linux__ */ | |
b3f3865e DS |
20 | #ifdef ANDROID |
21 | #include <cutils/sockets.h> | |
22 | #endif /* ANDROID */ | |
6fc6879b | 23 | |
09e47a07 JM |
24 | #include "utils/common.h" |
25 | #include "utils/eloop.h" | |
26 | #include "utils/list.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 | ||
34 | /** | |
35 | * struct wpa_ctrl_dst - Internal data structure of control interface monitors | |
36 | * | |
37 | * This structure is used to store information about registered control | |
38 | * interface monitors into struct wpa_supplicant. This data is private to | |
39 | * ctrl_iface_unix.c and should not be touched directly from other files. | |
40 | */ | |
41 | struct wpa_ctrl_dst { | |
09e47a07 | 42 | struct dl_list list; |
6fc6879b JM |
43 | struct sockaddr_un addr; |
44 | socklen_t addrlen; | |
45 | int debug_level; | |
46 | int errors; | |
47 | }; | |
48 | ||
49 | ||
50 | struct ctrl_iface_priv { | |
51 | struct wpa_supplicant *wpa_s; | |
52 | int sock; | |
09e47a07 | 53 | struct dl_list ctrl_dst; |
3a7414b6 | 54 | int android_control_socket; |
6fc6879b JM |
55 | }; |
56 | ||
57 | ||
214e428b JM |
58 | struct ctrl_iface_global_priv { |
59 | struct wpa_global *global; | |
60 | int sock; | |
61 | struct dl_list ctrl_dst; | |
3a7414b6 | 62 | int android_control_socket; |
214e428b JM |
63 | }; |
64 | ||
65 | ||
89286e91 JM |
66 | static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s, |
67 | const char *ifname, int sock, | |
214e428b | 68 | struct dl_list *ctrl_dst, |
6fc6879b | 69 | int level, const char *buf, |
89286e91 JM |
70 | size_t len, |
71 | struct ctrl_iface_priv *priv, | |
72 | struct ctrl_iface_global_priv *gp); | |
73 | static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s, | |
74 | struct ctrl_iface_priv *priv); | |
75 | static int wpas_ctrl_iface_global_reinit(struct wpa_global *global, | |
76 | struct ctrl_iface_global_priv *priv); | |
6fc6879b JM |
77 | |
78 | ||
2e95cfc1 JM |
79 | static void wpas_ctrl_sock_debug(const char *title, int sock, const char *buf, |
80 | size_t len) | |
81 | { | |
82 | #ifdef __linux__ | |
83 | socklen_t optlen; | |
84 | int sndbuf, outq; | |
85 | int level = MSG_DEBUG; | |
86 | ||
87 | if (len >= 5 && os_strncmp(buf, "PONG\n", 5) == 0) | |
88 | level = MSG_EXCESSIVE; | |
89 | ||
90 | optlen = sizeof(sndbuf); | |
91 | sndbuf = 0; | |
92 | if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, &optlen) < 0) | |
93 | sndbuf = -1; | |
94 | ||
95 | if (ioctl(sock, SIOCOUTQ, &outq) < 0) | |
96 | outq = -1; | |
97 | ||
98 | wpa_printf(level, | |
99 | "CTRL-DEBUG: %s: sock=%d sndbuf=%d outq=%d send_len=%d", | |
100 | title, sock, sndbuf, outq, (int) len); | |
101 | #endif /* __linux__ */ | |
102 | } | |
103 | ||
104 | ||
214e428b | 105 | static int wpa_supplicant_ctrl_iface_attach(struct dl_list *ctrl_dst, |
6fc6879b | 106 | struct sockaddr_un *from, |
0efcad2c | 107 | socklen_t fromlen, int global) |
6fc6879b JM |
108 | { |
109 | struct wpa_ctrl_dst *dst; | |
c9b55597 | 110 | char addr_txt[200]; |
6fc6879b JM |
111 | |
112 | dst = os_zalloc(sizeof(*dst)); | |
113 | if (dst == NULL) | |
114 | return -1; | |
115 | os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un)); | |
116 | dst->addrlen = fromlen; | |
117 | dst->debug_level = MSG_INFO; | |
214e428b | 118 | dl_list_add(ctrl_dst, &dst->list); |
c9b55597 JM |
119 | printf_encode(addr_txt, sizeof(addr_txt), |
120 | (u8 *) from->sun_path, | |
121 | fromlen - offsetof(struct sockaddr_un, sun_path)); | |
0efcad2c JM |
122 | wpa_printf(MSG_DEBUG, "CTRL_IFACE %smonitor attached %s", |
123 | global ? "global " : "", addr_txt); | |
6fc6879b JM |
124 | return 0; |
125 | } | |
126 | ||
127 | ||
214e428b | 128 | static int wpa_supplicant_ctrl_iface_detach(struct dl_list *ctrl_dst, |
6fc6879b JM |
129 | struct sockaddr_un *from, |
130 | socklen_t fromlen) | |
131 | { | |
09e47a07 | 132 | struct wpa_ctrl_dst *dst; |
6fc6879b | 133 | |
214e428b | 134 | dl_list_for_each(dst, ctrl_dst, struct wpa_ctrl_dst, list) { |
6fc6879b JM |
135 | if (fromlen == dst->addrlen && |
136 | os_memcmp(from->sun_path, dst->addr.sun_path, | |
19b9436c SL |
137 | fromlen - offsetof(struct sockaddr_un, sun_path)) |
138 | == 0) { | |
c9b55597 JM |
139 | char addr_txt[200]; |
140 | printf_encode(addr_txt, sizeof(addr_txt), | |
141 | (u8 *) from->sun_path, | |
142 | fromlen - | |
143 | offsetof(struct sockaddr_un, sun_path)); | |
144 | wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor detached %s", | |
145 | addr_txt); | |
a235aca3 JM |
146 | dl_list_del(&dst->list); |
147 | os_free(dst); | |
6fc6879b JM |
148 | return 0; |
149 | } | |
6fc6879b JM |
150 | } |
151 | return -1; | |
152 | } | |
153 | ||
154 | ||
155 | static int wpa_supplicant_ctrl_iface_level(struct ctrl_iface_priv *priv, | |
156 | struct sockaddr_un *from, | |
157 | socklen_t fromlen, | |
158 | char *level) | |
159 | { | |
160 | struct wpa_ctrl_dst *dst; | |
161 | ||
162 | wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level); | |
163 | ||
09e47a07 | 164 | dl_list_for_each(dst, &priv->ctrl_dst, struct wpa_ctrl_dst, list) { |
6fc6879b JM |
165 | if (fromlen == dst->addrlen && |
166 | os_memcmp(from->sun_path, dst->addr.sun_path, | |
19b9436c SL |
167 | fromlen - offsetof(struct sockaddr_un, sun_path)) |
168 | == 0) { | |
c9b55597 | 169 | char addr_txt[200]; |
6fc6879b | 170 | dst->debug_level = atoi(level); |
c9b55597 JM |
171 | printf_encode(addr_txt, sizeof(addr_txt), |
172 | (u8 *) from->sun_path, fromlen - | |
173 | offsetof(struct sockaddr_un, sun_path)); | |
174 | wpa_printf(MSG_DEBUG, "CTRL_IFACE changed monitor level to %d for %s", | |
175 | dst->debug_level, addr_txt); | |
6fc6879b JM |
176 | return 0; |
177 | } | |
6fc6879b JM |
178 | } |
179 | ||
180 | return -1; | |
181 | } | |
182 | ||
183 | ||
184 | static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx, | |
185 | void *sock_ctx) | |
186 | { | |
187 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
188 | struct ctrl_iface_priv *priv = sock_ctx; | |
b563b388 | 189 | char buf[4096]; |
6fc6879b JM |
190 | int res; |
191 | struct sockaddr_un from; | |
192 | socklen_t fromlen = sizeof(from); | |
742e715b | 193 | char *reply = NULL, *reply_buf = NULL; |
6fc6879b JM |
194 | size_t reply_len = 0; |
195 | int new_attached = 0; | |
196 | ||
197 | res = recvfrom(sock, buf, sizeof(buf) - 1, 0, | |
198 | (struct sockaddr *) &from, &fromlen); | |
199 | if (res < 0) { | |
2c6f8cf6 JM |
200 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
201 | strerror(errno)); | |
6fc6879b JM |
202 | return; |
203 | } | |
204 | buf[res] = '\0'; | |
205 | ||
206 | if (os_strcmp(buf, "ATTACH") == 0) { | |
214e428b | 207 | if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from, |
0efcad2c | 208 | fromlen, 0)) |
6fc6879b JM |
209 | reply_len = 1; |
210 | else { | |
211 | new_attached = 1; | |
212 | reply_len = 2; | |
213 | } | |
214 | } else if (os_strcmp(buf, "DETACH") == 0) { | |
214e428b JM |
215 | if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from, |
216 | fromlen)) | |
6fc6879b JM |
217 | reply_len = 1; |
218 | else | |
219 | reply_len = 2; | |
220 | } else if (os_strncmp(buf, "LEVEL ", 6) == 0) { | |
221 | if (wpa_supplicant_ctrl_iface_level(priv, &from, fromlen, | |
222 | buf + 6)) | |
223 | reply_len = 1; | |
224 | else | |
225 | reply_len = 2; | |
226 | } else { | |
742e715b JM |
227 | reply_buf = wpa_supplicant_ctrl_iface_process(wpa_s, buf, |
228 | &reply_len); | |
229 | reply = reply_buf; | |
14fd0331 JM |
230 | |
231 | /* | |
232 | * There could be some password/key material in the command, so | |
233 | * clear the buffer explicitly now that it is not needed | |
234 | * anymore. | |
235 | */ | |
236 | os_memset(buf, 0, res); | |
742e715b JM |
237 | } |
238 | ||
239 | if (!reply && reply_len == 1) { | |
240 | reply = "FAIL\n"; | |
241 | reply_len = 5; | |
242 | } else if (!reply && reply_len == 2) { | |
243 | reply = "OK\n"; | |
244 | reply_len = 3; | |
6fc6879b JM |
245 | } |
246 | ||
247 | if (reply) { | |
2e95cfc1 JM |
248 | wpas_ctrl_sock_debug("ctrl_sock-sendto", sock, reply, |
249 | reply_len); | |
79986bf6 JM |
250 | if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, |
251 | fromlen) < 0) { | |
89286e91 | 252 | int _errno = errno; |
79986bf6 | 253 | wpa_dbg(wpa_s, MSG_DEBUG, |
89286e91 JM |
254 | "ctrl_iface sendto failed: %d - %s", |
255 | _errno, strerror(_errno)); | |
256 | if (_errno == ENOBUFS || _errno == EAGAIN) { | |
257 | /* | |
258 | * The socket send buffer could be full. This | |
259 | * may happen if client programs are not | |
260 | * receiving their pending messages. Close and | |
261 | * reopen the socket as a workaround to avoid | |
262 | * getting stuck being unable to send any new | |
263 | * responses. | |
264 | */ | |
265 | sock = wpas_ctrl_iface_reinit(wpa_s, priv); | |
266 | if (sock < 0) { | |
267 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to reinitialize ctrl_iface socket"); | |
268 | } | |
269 | } | |
270 | if (new_attached) { | |
271 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to send response to ATTACH - detaching"); | |
272 | new_attached = 0; | |
273 | wpa_supplicant_ctrl_iface_detach( | |
274 | &priv->ctrl_dst, &from, fromlen); | |
275 | } | |
79986bf6 | 276 | } |
6fc6879b | 277 | } |
742e715b | 278 | os_free(reply_buf); |
6fc6879b JM |
279 | |
280 | if (new_attached) | |
281 | eapol_sm_notify_ctrl_attached(wpa_s->eapol); | |
282 | } | |
283 | ||
284 | ||
285 | static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s) | |
286 | { | |
287 | char *buf; | |
288 | size_t len; | |
6ed626df | 289 | char *pbuf, *dir = NULL; |
6fc6879b JM |
290 | int res; |
291 | ||
292 | if (wpa_s->conf->ctrl_interface == NULL) | |
293 | return NULL; | |
294 | ||
295 | pbuf = os_strdup(wpa_s->conf->ctrl_interface); | |
296 | if (pbuf == NULL) | |
297 | return NULL; | |
298 | if (os_strncmp(pbuf, "DIR=", 4) == 0) { | |
6ed626df | 299 | char *gid_str; |
6fc6879b JM |
300 | dir = pbuf + 4; |
301 | gid_str = os_strstr(dir, " GROUP="); | |
6ed626df | 302 | if (gid_str) |
6fc6879b | 303 | *gid_str = '\0'; |
6fc6879b JM |
304 | } else |
305 | dir = pbuf; | |
306 | ||
307 | len = os_strlen(dir) + os_strlen(wpa_s->ifname) + 2; | |
308 | buf = os_malloc(len); | |
309 | if (buf == NULL) { | |
310 | os_free(pbuf); | |
311 | return NULL; | |
312 | } | |
313 | ||
314 | res = os_snprintf(buf, len, "%s/%s", dir, wpa_s->ifname); | |
d85e1fc8 | 315 | if (os_snprintf_error(len, res)) { |
6fc6879b JM |
316 | os_free(pbuf); |
317 | os_free(buf); | |
318 | return NULL; | |
319 | } | |
320 | #ifdef __CYGWIN__ | |
321 | { | |
322 | /* Windows/WinPcap uses interface names that are not suitable | |
323 | * as a file name - convert invalid chars to underscores */ | |
324 | char *pos = buf; | |
325 | while (*pos) { | |
326 | if (*pos == '\\') | |
327 | *pos = '_'; | |
328 | pos++; | |
329 | } | |
330 | } | |
331 | #endif /* __CYGWIN__ */ | |
332 | os_free(pbuf); | |
333 | return buf; | |
334 | } | |
335 | ||
336 | ||
995a3a06 JM |
337 | static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level, |
338 | enum wpa_msg_type type, | |
6fc6879b JM |
339 | const char *txt, size_t len) |
340 | { | |
341 | struct wpa_supplicant *wpa_s = ctx; | |
214e428b JM |
342 | |
343 | if (wpa_s == NULL) | |
6fc6879b | 344 | return; |
214e428b | 345 | |
995a3a06 | 346 | if (type != WPA_MSG_NO_GLOBAL && wpa_s->global->ctrl_iface) { |
214e428b JM |
347 | struct ctrl_iface_global_priv *priv = wpa_s->global->ctrl_iface; |
348 | if (!dl_list_empty(&priv->ctrl_dst)) { | |
995a3a06 JM |
349 | wpa_supplicant_ctrl_iface_send( |
350 | wpa_s, | |
ee1e3f57 AN |
351 | type != WPA_MSG_PER_INTERFACE ? |
352 | NULL : wpa_s->ifname, | |
995a3a06 JM |
353 | priv->sock, &priv->ctrl_dst, level, txt, len, |
354 | NULL, priv); | |
214e428b JM |
355 | } |
356 | } | |
357 | ||
ee1e3f57 | 358 | if (type == WPA_MSG_ONLY_GLOBAL || wpa_s->ctrl_iface == NULL) |
214e428b | 359 | return; |
89286e91 | 360 | wpa_supplicant_ctrl_iface_send(wpa_s, NULL, wpa_s->ctrl_iface->sock, |
214e428b | 361 | &wpa_s->ctrl_iface->ctrl_dst, |
89286e91 JM |
362 | level, txt, len, wpa_s->ctrl_iface, |
363 | NULL); | |
6fc6879b JM |
364 | } |
365 | ||
366 | ||
89286e91 JM |
367 | static int wpas_ctrl_iface_open_sock(struct wpa_supplicant *wpa_s, |
368 | struct ctrl_iface_priv *priv) | |
6fc6879b | 369 | { |
6fc6879b JM |
370 | struct sockaddr_un addr; |
371 | char *fname = NULL; | |
372 | gid_t gid = 0; | |
373 | int gid_set = 0; | |
374 | char *buf, *dir = NULL, *gid_str = NULL; | |
375 | struct group *grp; | |
376 | char *endp; | |
4fdc8def | 377 | int flags; |
6fc6879b | 378 | |
6fc6879b JM |
379 | buf = os_strdup(wpa_s->conf->ctrl_interface); |
380 | if (buf == NULL) | |
381 | goto fail; | |
b3f3865e DS |
382 | #ifdef ANDROID |
383 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), "wpa_%s", | |
384 | wpa_s->conf->ctrl_interface); | |
385 | priv->sock = android_get_control_socket(addr.sun_path); | |
3a7414b6 NM |
386 | if (priv->sock >= 0) { |
387 | priv->android_control_socket = 1; | |
b3f3865e | 388 | goto havesock; |
3a7414b6 | 389 | } |
b3f3865e | 390 | #endif /* ANDROID */ |
6fc6879b JM |
391 | if (os_strncmp(buf, "DIR=", 4) == 0) { |
392 | dir = buf + 4; | |
393 | gid_str = os_strstr(dir, " GROUP="); | |
394 | if (gid_str) { | |
395 | *gid_str = '\0'; | |
396 | gid_str += 7; | |
397 | } | |
398 | } else { | |
399 | dir = buf; | |
400 | gid_str = wpa_s->conf->ctrl_interface_group; | |
401 | } | |
402 | ||
403 | if (mkdir(dir, S_IRWXU | S_IRWXG) < 0) { | |
404 | if (errno == EEXIST) { | |
405 | wpa_printf(MSG_DEBUG, "Using existing control " | |
406 | "interface directory."); | |
407 | } else { | |
2c6f8cf6 JM |
408 | wpa_printf(MSG_ERROR, "mkdir[ctrl_interface=%s]: %s", |
409 | dir, strerror(errno)); | |
6fc6879b JM |
410 | goto fail; |
411 | } | |
412 | } | |
413 | ||
d49ea682 JM |
414 | #ifdef ANDROID |
415 | /* | |
416 | * wpa_supplicant is started from /init.*.rc on Android and that seems | |
417 | * to be using umask 0077 which would leave the control interface | |
418 | * directory without group access. This breaks things since Wi-Fi | |
419 | * framework assumes that this directory can be accessed by other | |
420 | * applications in the wifi group. Fix this by adding group access even | |
421 | * if umask value would prevent this. | |
422 | */ | |
423 | if (chmod(dir, S_IRWXU | S_IRWXG) < 0) { | |
424 | wpa_printf(MSG_ERROR, "CTRL: Could not chmod directory: %s", | |
425 | strerror(errno)); | |
426 | /* Try to continue anyway */ | |
427 | } | |
428 | #endif /* ANDROID */ | |
429 | ||
6fc6879b JM |
430 | if (gid_str) { |
431 | grp = getgrnam(gid_str); | |
432 | if (grp) { | |
433 | gid = grp->gr_gid; | |
434 | gid_set = 1; | |
435 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d" | |
436 | " (from group name '%s')", | |
437 | (int) gid, gid_str); | |
438 | } else { | |
439 | /* Group name not found - try to parse this as gid */ | |
440 | gid = strtol(gid_str, &endp, 10); | |
441 | if (*gid_str == '\0' || *endp != '\0') { | |
8e888179 | 442 | wpa_printf(MSG_ERROR, "CTRL: Invalid group " |
6fc6879b JM |
443 | "'%s'", gid_str); |
444 | goto fail; | |
445 | } | |
446 | gid_set = 1; | |
447 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d", | |
448 | (int) gid); | |
449 | } | |
450 | } | |
451 | ||
452 | if (gid_set && chown(dir, -1, gid) < 0) { | |
2c6f8cf6 JM |
453 | wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s", |
454 | dir, (int) gid, strerror(errno)); | |
6fc6879b JM |
455 | goto fail; |
456 | } | |
457 | ||
3fd2a226 AAS |
458 | /* Make sure the group can enter and read the directory */ |
459 | if (gid_set && | |
460 | chmod(dir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP) < 0) { | |
461 | wpa_printf(MSG_ERROR, "CTRL: chmod[ctrl_interface]: %s", | |
462 | strerror(errno)); | |
463 | goto fail; | |
464 | } | |
465 | ||
6fc6879b JM |
466 | if (os_strlen(dir) + 1 + os_strlen(wpa_s->ifname) >= |
467 | sizeof(addr.sun_path)) { | |
468 | wpa_printf(MSG_ERROR, "ctrl_iface path limit exceeded"); | |
469 | goto fail; | |
470 | } | |
471 | ||
472 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
473 | if (priv->sock < 0) { | |
2c6f8cf6 | 474 | wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); |
6fc6879b JM |
475 | goto fail; |
476 | } | |
477 | ||
478 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 479 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
480 | addr.sun_len = sizeof(addr); |
481 | #endif /* __FreeBSD__ */ | |
6fc6879b JM |
482 | addr.sun_family = AF_UNIX; |
483 | fname = wpa_supplicant_ctrl_iface_path(wpa_s); | |
484 | if (fname == NULL) | |
485 | goto fail; | |
486 | os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path)); | |
487 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
488 | wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s", | |
489 | strerror(errno)); | |
490 | if (connect(priv->sock, (struct sockaddr *) &addr, | |
491 | sizeof(addr)) < 0) { | |
492 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
493 | " allow connections - assuming it was left" | |
494 | "over from forced program termination"); | |
495 | if (unlink(fname) < 0) { | |
2c6f8cf6 JM |
496 | wpa_printf(MSG_ERROR, |
497 | "Could not unlink existing ctrl_iface socket '%s': %s", | |
498 | fname, strerror(errno)); | |
6fc6879b JM |
499 | goto fail; |
500 | } | |
501 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
502 | sizeof(addr)) < 0) { | |
2c6f8cf6 JM |
503 | wpa_printf(MSG_ERROR, "supp-ctrl-iface-init: bind(PF_UNIX): %s", |
504 | strerror(errno)); | |
6fc6879b JM |
505 | goto fail; |
506 | } | |
507 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
508 | "ctrl_iface socket '%s'", fname); | |
509 | } else { | |
510 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
511 | "be in use - cannot override it"); | |
512 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
513 | "not used anymore", fname); | |
514 | os_free(fname); | |
515 | fname = NULL; | |
516 | goto fail; | |
517 | } | |
518 | } | |
519 | ||
520 | if (gid_set && chown(fname, -1, gid) < 0) { | |
2c6f8cf6 JM |
521 | wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s", |
522 | fname, (int) gid, strerror(errno)); | |
6fc6879b JM |
523 | goto fail; |
524 | } | |
525 | ||
526 | if (chmod(fname, S_IRWXU | S_IRWXG) < 0) { | |
2c6f8cf6 JM |
527 | wpa_printf(MSG_ERROR, "chmod[ctrl_interface=%s]: %s", |
528 | fname, strerror(errno)); | |
6fc6879b JM |
529 | goto fail; |
530 | } | |
531 | os_free(fname); | |
532 | ||
b3f3865e DS |
533 | #ifdef ANDROID |
534 | havesock: | |
535 | #endif /* ANDROID */ | |
4fdc8def BG |
536 | |
537 | /* | |
538 | * Make socket non-blocking so that we don't hang forever if | |
539 | * target dies unexpectedly. | |
540 | */ | |
541 | flags = fcntl(priv->sock, F_GETFL); | |
542 | if (flags >= 0) { | |
543 | flags |= O_NONBLOCK; | |
544 | if (fcntl(priv->sock, F_SETFL, flags) < 0) { | |
2c6f8cf6 JM |
545 | wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s", |
546 | strerror(errno)); | |
4fdc8def BG |
547 | /* Not fatal, continue on.*/ |
548 | } | |
549 | } | |
550 | ||
6fc6879b JM |
551 | eloop_register_read_sock(priv->sock, wpa_supplicant_ctrl_iface_receive, |
552 | wpa_s, priv); | |
553 | wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb); | |
554 | ||
555 | os_free(buf); | |
89286e91 | 556 | return 0; |
6fc6879b JM |
557 | |
558 | fail: | |
89286e91 | 559 | if (priv->sock >= 0) { |
6fc6879b | 560 | close(priv->sock); |
89286e91 JM |
561 | priv->sock = -1; |
562 | } | |
6fc6879b JM |
563 | if (fname) { |
564 | unlink(fname); | |
565 | os_free(fname); | |
566 | } | |
567 | os_free(buf); | |
89286e91 JM |
568 | return -1; |
569 | } | |
570 | ||
571 | ||
572 | struct ctrl_iface_priv * | |
573 | wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s) | |
574 | { | |
575 | struct ctrl_iface_priv *priv; | |
576 | ||
577 | priv = os_zalloc(sizeof(*priv)); | |
578 | if (priv == NULL) | |
579 | return NULL; | |
580 | dl_list_init(&priv->ctrl_dst); | |
581 | priv->wpa_s = wpa_s; | |
582 | priv->sock = -1; | |
583 | ||
584 | if (wpa_s->conf->ctrl_interface == NULL) | |
585 | return priv; | |
586 | ||
587 | if (wpas_ctrl_iface_open_sock(wpa_s, priv) < 0) { | |
588 | os_free(priv); | |
589 | return NULL; | |
590 | } | |
591 | ||
592 | return priv; | |
593 | } | |
594 | ||
595 | ||
596 | static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s, | |
597 | struct ctrl_iface_priv *priv) | |
598 | { | |
599 | int res; | |
600 | ||
601 | if (priv->sock <= 0) | |
602 | return -1; | |
603 | ||
3a7414b6 NM |
604 | /* |
605 | * On Android, the control socket being used may be the socket | |
606 | * that is created when wpa_supplicant is started as a /init.*.rc | |
607 | * service. Such a socket is maintained as a key-value pair in | |
608 | * Android's environment. Closing this control socket would leave us | |
609 | * in a bad state with an invalid socket descriptor. | |
610 | */ | |
611 | if (priv->android_control_socket) | |
612 | return priv->sock; | |
613 | ||
89286e91 JM |
614 | eloop_unregister_read_sock(priv->sock); |
615 | close(priv->sock); | |
616 | priv->sock = -1; | |
617 | res = wpas_ctrl_iface_open_sock(wpa_s, priv); | |
618 | if (res < 0) | |
619 | return -1; | |
620 | return priv->sock; | |
6fc6879b JM |
621 | } |
622 | ||
623 | ||
624 | void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv) | |
625 | { | |
626 | struct wpa_ctrl_dst *dst, *prev; | |
627 | ||
628 | if (priv->sock > -1) { | |
629 | char *fname; | |
6ed626df | 630 | char *buf, *dir = NULL; |
6fc6879b | 631 | eloop_unregister_read_sock(priv->sock); |
09e47a07 | 632 | if (!dl_list_empty(&priv->ctrl_dst)) { |
6fc6879b | 633 | /* |
e0591c3c | 634 | * Wait before closing the control socket if |
6fc6879b JM |
635 | * there are any attached monitors in order to allow |
636 | * them to receive any pending messages. | |
637 | */ | |
638 | wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached " | |
639 | "monitors to receive messages"); | |
e0591c3c | 640 | os_sleep(0, 100000); |
6fc6879b JM |
641 | } |
642 | close(priv->sock); | |
643 | priv->sock = -1; | |
644 | fname = wpa_supplicant_ctrl_iface_path(priv->wpa_s); | |
645 | if (fname) { | |
646 | unlink(fname); | |
647 | os_free(fname); | |
648 | } | |
649 | ||
ea61aa1d JM |
650 | if (priv->wpa_s->conf->ctrl_interface == NULL) |
651 | goto free_dst; | |
6fc6879b JM |
652 | buf = os_strdup(priv->wpa_s->conf->ctrl_interface); |
653 | if (buf == NULL) | |
654 | goto free_dst; | |
655 | if (os_strncmp(buf, "DIR=", 4) == 0) { | |
6ed626df | 656 | char *gid_str; |
6fc6879b JM |
657 | dir = buf + 4; |
658 | gid_str = os_strstr(dir, " GROUP="); | |
6ed626df | 659 | if (gid_str) |
6fc6879b | 660 | *gid_str = '\0'; |
6fc6879b JM |
661 | } else |
662 | dir = buf; | |
663 | ||
664 | if (rmdir(dir) < 0) { | |
665 | if (errno == ENOTEMPTY) { | |
666 | wpa_printf(MSG_DEBUG, "Control interface " | |
667 | "directory not empty - leaving it " | |
668 | "behind"); | |
669 | } else { | |
2c6f8cf6 JM |
670 | wpa_printf(MSG_ERROR, |
671 | "rmdir[ctrl_interface=%s]: %s", | |
672 | dir, strerror(errno)); | |
6fc6879b JM |
673 | } |
674 | } | |
675 | os_free(buf); | |
676 | } | |
677 | ||
678 | free_dst: | |
09e47a07 JM |
679 | dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst, |
680 | list) | |
681 | os_free(dst); | |
6fc6879b JM |
682 | os_free(priv); |
683 | } | |
684 | ||
685 | ||
686 | /** | |
687 | * wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors | |
214e428b JM |
688 | * @ifname: Interface name for global control socket or %NULL |
689 | * @sock: Local socket fd | |
690 | * @ctrl_dst: List of attached listeners | |
6fc6879b JM |
691 | * @level: Priority level of the message |
692 | * @buf: Message data | |
693 | * @len: Message length | |
694 | * | |
695 | * Send a packet to all monitor programs attached to the control interface. | |
696 | */ | |
89286e91 JM |
697 | static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s, |
698 | const char *ifname, int sock, | |
214e428b | 699 | struct dl_list *ctrl_dst, |
6fc6879b | 700 | int level, const char *buf, |
89286e91 JM |
701 | size_t len, |
702 | struct ctrl_iface_priv *priv, | |
703 | struct ctrl_iface_global_priv *gp) | |
6fc6879b JM |
704 | { |
705 | struct wpa_ctrl_dst *dst, *next; | |
706 | char levelstr[10]; | |
707 | int idx, res; | |
708 | struct msghdr msg; | |
214e428b | 709 | struct iovec io[5]; |
6fc6879b | 710 | |
214e428b | 711 | if (sock < 0 || dl_list_empty(ctrl_dst)) |
6fc6879b JM |
712 | return; |
713 | ||
714 | res = os_snprintf(levelstr, sizeof(levelstr), "<%d>", level); | |
d85e1fc8 | 715 | if (os_snprintf_error(sizeof(levelstr), res)) |
6fc6879b | 716 | return; |
214e428b JM |
717 | idx = 0; |
718 | if (ifname) { | |
719 | io[idx].iov_base = "IFNAME="; | |
720 | io[idx].iov_len = 7; | |
721 | idx++; | |
722 | io[idx].iov_base = (char *) ifname; | |
723 | io[idx].iov_len = os_strlen(ifname); | |
724 | idx++; | |
725 | io[idx].iov_base = " "; | |
726 | io[idx].iov_len = 1; | |
727 | idx++; | |
728 | } | |
729 | io[idx].iov_base = levelstr; | |
730 | io[idx].iov_len = os_strlen(levelstr); | |
731 | idx++; | |
732 | io[idx].iov_base = (char *) buf; | |
733 | io[idx].iov_len = len; | |
734 | idx++; | |
6fc6879b JM |
735 | os_memset(&msg, 0, sizeof(msg)); |
736 | msg.msg_iov = io; | |
214e428b | 737 | msg.msg_iovlen = idx; |
6fc6879b | 738 | |
214e428b | 739 | dl_list_for_each_safe(dst, next, ctrl_dst, struct wpa_ctrl_dst, list) { |
89286e91 | 740 | int _errno; |
c9b55597 | 741 | char addr_txt[200]; |
89286e91 | 742 | |
89286e91 JM |
743 | if (level < dst->debug_level) |
744 | continue; | |
745 | ||
c9b55597 JM |
746 | printf_encode(addr_txt, sizeof(addr_txt), |
747 | (u8 *) dst->addr.sun_path, dst->addrlen - | |
748 | offsetof(struct sockaddr_un, sun_path)); | |
89286e91 JM |
749 | msg.msg_name = (void *) &dst->addr; |
750 | msg.msg_namelen = dst->addrlen; | |
2e95cfc1 | 751 | wpas_ctrl_sock_debug("ctrl_sock-sendmsg", sock, buf, len); |
89286e91 | 752 | if (sendmsg(sock, &msg, MSG_DONTWAIT) >= 0) { |
c9b55597 JM |
753 | wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor sent successfully to %s", |
754 | addr_txt); | |
89286e91 | 755 | dst->errors = 0; |
89286e91 JM |
756 | continue; |
757 | } | |
758 | ||
759 | _errno = errno; | |
c9b55597 JM |
760 | wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor[%s]: %d - %s", |
761 | addr_txt, errno, strerror(errno)); | |
89286e91 JM |
762 | dst->errors++; |
763 | ||
764 | if (dst->errors > 10 || _errno == ENOENT || _errno == EPERM) { | |
c9b55597 JM |
765 | wpa_printf(MSG_INFO, "CTRL_IFACE: Detach monitor %s that cannot receive messages", |
766 | addr_txt); | |
89286e91 JM |
767 | wpa_supplicant_ctrl_iface_detach(ctrl_dst, &dst->addr, |
768 | dst->addrlen); | |
769 | } | |
770 | ||
771 | if (_errno == ENOBUFS || _errno == EAGAIN) { | |
772 | /* | |
773 | * The socket send buffer could be full. This may happen | |
774 | * if client programs are not receiving their pending | |
775 | * messages. Close and reopen the socket as a workaround | |
776 | * to avoid getting stuck being unable to send any new | |
777 | * responses. | |
778 | */ | |
779 | if (priv) | |
780 | sock = wpas_ctrl_iface_reinit(wpa_s, priv); | |
781 | else if (gp) | |
782 | sock = wpas_ctrl_iface_global_reinit( | |
783 | wpa_s->global, gp); | |
784 | else | |
785 | break; | |
786 | if (sock < 0) { | |
787 | wpa_dbg(wpa_s, MSG_DEBUG, | |
788 | "Failed to reinitialize ctrl_iface socket"); | |
29179b88 | 789 | break; |
89286e91 JM |
790 | } |
791 | } | |
6fc6879b JM |
792 | } |
793 | } | |
794 | ||
795 | ||
796 | void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv) | |
797 | { | |
798 | char buf[256]; | |
799 | int res; | |
800 | struct sockaddr_un from; | |
801 | socklen_t fromlen = sizeof(from); | |
802 | ||
803 | for (;;) { | |
804 | wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor to " | |
805 | "attach", priv->wpa_s->ifname); | |
806 | eloop_wait_for_read_sock(priv->sock); | |
807 | ||
808 | res = recvfrom(priv->sock, buf, sizeof(buf) - 1, 0, | |
809 | (struct sockaddr *) &from, &fromlen); | |
810 | if (res < 0) { | |
2c6f8cf6 JM |
811 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
812 | strerror(errno)); | |
6fc6879b JM |
813 | continue; |
814 | } | |
815 | buf[res] = '\0'; | |
816 | ||
817 | if (os_strcmp(buf, "ATTACH") == 0) { | |
818 | /* handle ATTACH signal of first monitor interface */ | |
214e428b | 819 | if (!wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, |
0efcad2c JM |
820 | &from, fromlen, |
821 | 0)) { | |
79986bf6 JM |
822 | if (sendto(priv->sock, "OK\n", 3, 0, |
823 | (struct sockaddr *) &from, fromlen) < | |
824 | 0) { | |
825 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
826 | strerror(errno)); | |
827 | } | |
6fc6879b JM |
828 | /* OK to continue */ |
829 | return; | |
830 | } else { | |
79986bf6 JM |
831 | if (sendto(priv->sock, "FAIL\n", 5, 0, |
832 | (struct sockaddr *) &from, fromlen) < | |
833 | 0) { | |
834 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
835 | strerror(errno)); | |
836 | } | |
6fc6879b JM |
837 | } |
838 | } else { | |
839 | /* return FAIL for all other signals */ | |
79986bf6 JM |
840 | if (sendto(priv->sock, "FAIL\n", 5, 0, |
841 | (struct sockaddr *) &from, fromlen) < 0) { | |
842 | wpa_printf(MSG_DEBUG, | |
843 | "ctrl_iface sendto failed: %s", | |
844 | strerror(errno)); | |
845 | } | |
6fc6879b JM |
846 | } |
847 | } | |
848 | } | |
849 | ||
850 | ||
851 | /* Global ctrl_iface */ | |
852 | ||
6fc6879b JM |
853 | static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx, |
854 | void *sock_ctx) | |
855 | { | |
856 | struct wpa_global *global = eloop_ctx; | |
214e428b | 857 | struct ctrl_iface_global_priv *priv = sock_ctx; |
8615bdfa | 858 | char buf[4096]; |
6fc6879b JM |
859 | int res; |
860 | struct sockaddr_un from; | |
861 | socklen_t fromlen = sizeof(from); | |
742e715b | 862 | char *reply = NULL, *reply_buf = NULL; |
6fc6879b JM |
863 | size_t reply_len; |
864 | ||
865 | res = recvfrom(sock, buf, sizeof(buf) - 1, 0, | |
866 | (struct sockaddr *) &from, &fromlen); | |
867 | if (res < 0) { | |
2c6f8cf6 JM |
868 | wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s", |
869 | strerror(errno)); | |
6fc6879b JM |
870 | return; |
871 | } | |
872 | buf[res] = '\0'; | |
873 | ||
214e428b JM |
874 | if (os_strcmp(buf, "ATTACH") == 0) { |
875 | if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from, | |
0efcad2c | 876 | fromlen, 1)) |
214e428b JM |
877 | reply_len = 1; |
878 | else | |
879 | reply_len = 2; | |
880 | } else if (os_strcmp(buf, "DETACH") == 0) { | |
881 | if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from, | |
882 | fromlen)) | |
883 | reply_len = 1; | |
884 | else | |
885 | reply_len = 2; | |
886 | } else { | |
742e715b JM |
887 | reply_buf = wpa_supplicant_global_ctrl_iface_process( |
888 | global, buf, &reply_len); | |
889 | reply = reply_buf; | |
14fd0331 JM |
890 | |
891 | /* | |
892 | * There could be some password/key material in the command, so | |
893 | * clear the buffer explicitly now that it is not needed | |
894 | * anymore. | |
895 | */ | |
896 | os_memset(buf, 0, res); | |
742e715b JM |
897 | } |
898 | ||
899 | if (!reply && reply_len == 1) { | |
900 | reply = "FAIL\n"; | |
901 | reply_len = 5; | |
902 | } else if (!reply && reply_len == 2) { | |
903 | reply = "OK\n"; | |
904 | reply_len = 3; | |
214e428b | 905 | } |
6fc6879b JM |
906 | |
907 | if (reply) { | |
2e95cfc1 JM |
908 | wpas_ctrl_sock_debug("global_ctrl_sock-sendto", |
909 | sock, reply, reply_len); | |
79986bf6 JM |
910 | if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, |
911 | fromlen) < 0) { | |
912 | wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s", | |
913 | strerror(errno)); | |
914 | } | |
6fc6879b | 915 | } |
742e715b | 916 | os_free(reply_buf); |
6fc6879b JM |
917 | } |
918 | ||
919 | ||
89286e91 JM |
920 | static int wpas_global_ctrl_iface_open_sock(struct wpa_global *global, |
921 | struct ctrl_iface_global_priv *priv) | |
6fc6879b | 922 | { |
6fc6879b | 923 | struct sockaddr_un addr; |
d2a9e2c7 | 924 | const char *ctrl = global->params.ctrl_interface; |
8d6e0350 | 925 | int flags; |
6fc6879b | 926 | |
d2a9e2c7 JM |
927 | wpa_printf(MSG_DEBUG, "Global control interface '%s'", ctrl); |
928 | ||
b3f3865e | 929 | #ifdef ANDROID |
d2a9e2c7 JM |
930 | if (os_strncmp(ctrl, "@android:", 9) == 0) { |
931 | priv->sock = android_get_control_socket(ctrl + 9); | |
932 | if (priv->sock < 0) { | |
933 | wpa_printf(MSG_ERROR, "Failed to open Android control " | |
934 | "socket '%s'", ctrl + 9); | |
935 | goto fail; | |
936 | } | |
937 | wpa_printf(MSG_DEBUG, "Using Android control socket '%s'", | |
938 | ctrl + 9); | |
3a7414b6 | 939 | priv->android_control_socket = 1; |
b3f3865e | 940 | goto havesock; |
d2a9e2c7 | 941 | } |
b3f3865e | 942 | |
d2a9e2c7 JM |
943 | if (os_strncmp(ctrl, "@abstract:", 10) != 0) { |
944 | /* | |
945 | * Backwards compatibility - try to open an Android control | |
946 | * socket and if that fails, assume this was a UNIX domain | |
947 | * socket instead. | |
948 | */ | |
949 | priv->sock = android_get_control_socket(ctrl); | |
950 | if (priv->sock >= 0) { | |
951 | wpa_printf(MSG_DEBUG, | |
952 | "Using Android control socket '%s'", | |
953 | ctrl); | |
3a7414b6 | 954 | priv->android_control_socket = 1; |
d2a9e2c7 JM |
955 | goto havesock; |
956 | } | |
957 | } | |
958 | #endif /* ANDROID */ | |
6fc6879b JM |
959 | |
960 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
961 | if (priv->sock < 0) { | |
2c6f8cf6 | 962 | wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); |
6fc6879b JM |
963 | goto fail; |
964 | } | |
965 | ||
966 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 967 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
968 | addr.sun_len = sizeof(addr); |
969 | #endif /* __FreeBSD__ */ | |
6fc6879b | 970 | addr.sun_family = AF_UNIX; |
d2a9e2c7 JM |
971 | |
972 | if (os_strncmp(ctrl, "@abstract:", 10) == 0) { | |
973 | addr.sun_path[0] = '\0'; | |
974 | os_strlcpy(addr.sun_path + 1, ctrl + 10, | |
975 | sizeof(addr.sun_path) - 1); | |
976 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < | |
977 | 0) { | |
978 | wpa_printf(MSG_ERROR, "supp-global-ctrl-iface-init: " | |
2c6f8cf6 JM |
979 | "bind(PF_UNIX;%s) failed: %s", |
980 | ctrl, strerror(errno)); | |
d2a9e2c7 JM |
981 | goto fail; |
982 | } | |
983 | wpa_printf(MSG_DEBUG, "Using Abstract control socket '%s'", | |
984 | ctrl + 10); | |
985 | goto havesock; | |
986 | } | |
987 | ||
988 | os_strlcpy(addr.sun_path, ctrl, sizeof(addr.sun_path)); | |
6fc6879b | 989 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
2c6f8cf6 JM |
990 | wpa_printf(MSG_INFO, "supp-global-ctrl-iface-init(%s) (will try fixup): bind(PF_UNIX): %s", |
991 | ctrl, strerror(errno)); | |
6fc6879b JM |
992 | if (connect(priv->sock, (struct sockaddr *) &addr, |
993 | sizeof(addr)) < 0) { | |
994 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
995 | " allow connections - assuming it was left" | |
996 | "over from forced program termination"); | |
d2a9e2c7 | 997 | if (unlink(ctrl) < 0) { |
2c6f8cf6 JM |
998 | wpa_printf(MSG_ERROR, |
999 | "Could not unlink existing ctrl_iface socket '%s': %s", | |
1000 | ctrl, strerror(errno)); | |
6fc6879b JM |
1001 | goto fail; |
1002 | } | |
1003 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
1004 | sizeof(addr)) < 0) { | |
2c6f8cf6 JM |
1005 | wpa_printf(MSG_ERROR, "supp-glb-iface-init: bind(PF_UNIX;%s): %s", |
1006 | ctrl, strerror(errno)); | |
6fc6879b JM |
1007 | goto fail; |
1008 | } | |
1009 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
1010 | "ctrl_iface socket '%s'", | |
d2a9e2c7 | 1011 | ctrl); |
6fc6879b JM |
1012 | } else { |
1013 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
1014 | "be in use - cannot override it"); | |
1015 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
1016 | "not used anymore", | |
d2a9e2c7 | 1017 | ctrl); |
6fc6879b JM |
1018 | goto fail; |
1019 | } | |
1020 | } | |
1021 | ||
d2a9e2c7 JM |
1022 | wpa_printf(MSG_DEBUG, "Using UNIX control socket '%s'", ctrl); |
1023 | ||
29257565 JM |
1024 | if (global->params.ctrl_interface_group) { |
1025 | char *gid_str = global->params.ctrl_interface_group; | |
1026 | gid_t gid = 0; | |
1027 | struct group *grp; | |
1028 | char *endp; | |
1029 | ||
1030 | grp = getgrnam(gid_str); | |
1031 | if (grp) { | |
1032 | gid = grp->gr_gid; | |
1033 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d" | |
1034 | " (from group name '%s')", | |
1035 | (int) gid, gid_str); | |
1036 | } else { | |
1037 | /* Group name not found - try to parse this as gid */ | |
1038 | gid = strtol(gid_str, &endp, 10); | |
1039 | if (*gid_str == '\0' || *endp != '\0') { | |
1040 | wpa_printf(MSG_ERROR, "CTRL: Invalid group " | |
1041 | "'%s'", gid_str); | |
1042 | goto fail; | |
1043 | } | |
1044 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d", | |
1045 | (int) gid); | |
1046 | } | |
d2a9e2c7 | 1047 | if (chown(ctrl, -1, gid) < 0) { |
2c6f8cf6 JM |
1048 | wpa_printf(MSG_ERROR, |
1049 | "chown[global_ctrl_interface=%s,gid=%d]: %s", | |
1050 | ctrl, (int) gid, strerror(errno)); | |
29257565 JM |
1051 | goto fail; |
1052 | } | |
1053 | ||
d2a9e2c7 | 1054 | if (chmod(ctrl, S_IRWXU | S_IRWXG) < 0) { |
2c6f8cf6 JM |
1055 | wpa_printf(MSG_ERROR, |
1056 | "chmod[global_ctrl_interface=%s]: %s", | |
1057 | ctrl, strerror(errno)); | |
29257565 JM |
1058 | goto fail; |
1059 | } | |
d2a9e2c7 | 1060 | } else { |
f62415df JM |
1061 | if (chmod(ctrl, S_IRWXU) < 0) { |
1062 | wpa_printf(MSG_DEBUG, | |
1063 | "chmod[global_ctrl_interface=%s](S_IRWXU): %s", | |
1064 | ctrl, strerror(errno)); | |
1065 | /* continue anyway since group change was not required | |
1066 | */ | |
1067 | } | |
29257565 JM |
1068 | } |
1069 | ||
b3f3865e | 1070 | havesock: |
8d6e0350 JM |
1071 | |
1072 | /* | |
1073 | * Make socket non-blocking so that we don't hang forever if | |
1074 | * target dies unexpectedly. | |
1075 | */ | |
1076 | flags = fcntl(priv->sock, F_GETFL); | |
1077 | if (flags >= 0) { | |
1078 | flags |= O_NONBLOCK; | |
1079 | if (fcntl(priv->sock, F_SETFL, flags) < 0) { | |
2c6f8cf6 JM |
1080 | wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s", |
1081 | strerror(errno)); | |
8d6e0350 JM |
1082 | /* Not fatal, continue on.*/ |
1083 | } | |
1084 | } | |
1085 | ||
6fc6879b JM |
1086 | eloop_register_read_sock(priv->sock, |
1087 | wpa_supplicant_global_ctrl_iface_receive, | |
214e428b | 1088 | global, priv); |
6fc6879b | 1089 | |
89286e91 | 1090 | return 0; |
6fc6879b JM |
1091 | |
1092 | fail: | |
89286e91 | 1093 | if (priv->sock >= 0) { |
6fc6879b | 1094 | close(priv->sock); |
89286e91 JM |
1095 | priv->sock = -1; |
1096 | } | |
1097 | return -1; | |
1098 | } | |
1099 | ||
1100 | ||
1101 | struct ctrl_iface_global_priv * | |
1102 | wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global) | |
1103 | { | |
1104 | struct ctrl_iface_global_priv *priv; | |
1105 | ||
1106 | priv = os_zalloc(sizeof(*priv)); | |
1107 | if (priv == NULL) | |
1108 | return NULL; | |
1109 | dl_list_init(&priv->ctrl_dst); | |
1110 | priv->global = global; | |
1111 | priv->sock = -1; | |
1112 | ||
1113 | if (global->params.ctrl_interface == NULL) | |
1114 | return priv; | |
1115 | ||
1116 | if (wpas_global_ctrl_iface_open_sock(global, priv) < 0) { | |
1117 | os_free(priv); | |
1118 | return NULL; | |
1119 | } | |
1120 | ||
76fe79ef JM |
1121 | wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb); |
1122 | ||
89286e91 JM |
1123 | return priv; |
1124 | } | |
1125 | ||
1126 | ||
1127 | static int wpas_ctrl_iface_global_reinit(struct wpa_global *global, | |
1128 | struct ctrl_iface_global_priv *priv) | |
1129 | { | |
1130 | int res; | |
1131 | ||
1132 | if (priv->sock <= 0) | |
1133 | return -1; | |
1134 | ||
3a7414b6 NM |
1135 | /* |
1136 | * On Android, the control socket being used may be the socket | |
1137 | * that is created when wpa_supplicant is started as a /init.*.rc | |
1138 | * service. Such a socket is maintained as a key-value pair in | |
1139 | * Android's environment. Closing this control socket would leave us | |
1140 | * in a bad state with an invalid socket descriptor. | |
1141 | */ | |
1142 | if (priv->android_control_socket) | |
1143 | return priv->sock; | |
1144 | ||
89286e91 JM |
1145 | eloop_unregister_read_sock(priv->sock); |
1146 | close(priv->sock); | |
1147 | priv->sock = -1; | |
1148 | res = wpas_global_ctrl_iface_open_sock(global, priv); | |
1149 | if (res < 0) | |
1150 | return -1; | |
1151 | return priv->sock; | |
6fc6879b JM |
1152 | } |
1153 | ||
1154 | ||
1155 | void | |
1156 | wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv) | |
1157 | { | |
214e428b JM |
1158 | struct wpa_ctrl_dst *dst, *prev; |
1159 | ||
6fc6879b JM |
1160 | if (priv->sock >= 0) { |
1161 | eloop_unregister_read_sock(priv->sock); | |
1162 | close(priv->sock); | |
1163 | } | |
1164 | if (priv->global->params.ctrl_interface) | |
1165 | unlink(priv->global->params.ctrl_interface); | |
214e428b JM |
1166 | dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst, |
1167 | list) | |
1168 | os_free(dst); | |
6fc6879b JM |
1169 | os_free(priv); |
1170 | } |