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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant / UNIX domain socket -based control interface | |
09e47a07 | 3 | * Copyright (c) 2004-2009, 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> | |
b3f3865e DS |
16 | #ifdef ANDROID |
17 | #include <cutils/sockets.h> | |
18 | #endif /* ANDROID */ | |
6fc6879b | 19 | |
09e47a07 JM |
20 | #include "utils/common.h" |
21 | #include "utils/eloop.h" | |
22 | #include "utils/list.h" | |
6fc6879b | 23 | #include "eapol_supp/eapol_supp_sm.h" |
09e47a07 | 24 | #include "config.h" |
6fc6879b JM |
25 | #include "wpa_supplicant_i.h" |
26 | #include "ctrl_iface.h" | |
27 | ||
28 | /* Per-interface ctrl_iface */ | |
29 | ||
30 | /** | |
31 | * struct wpa_ctrl_dst - Internal data structure of control interface monitors | |
32 | * | |
33 | * This structure is used to store information about registered control | |
34 | * interface monitors into struct wpa_supplicant. This data is private to | |
35 | * ctrl_iface_unix.c and should not be touched directly from other files. | |
36 | */ | |
37 | struct wpa_ctrl_dst { | |
09e47a07 | 38 | struct dl_list list; |
6fc6879b JM |
39 | struct sockaddr_un addr; |
40 | socklen_t addrlen; | |
41 | int debug_level; | |
42 | int errors; | |
43 | }; | |
44 | ||
45 | ||
46 | struct ctrl_iface_priv { | |
47 | struct wpa_supplicant *wpa_s; | |
48 | int sock; | |
09e47a07 | 49 | struct dl_list ctrl_dst; |
6fc6879b JM |
50 | }; |
51 | ||
52 | ||
53 | static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv, | |
54 | int level, const char *buf, | |
55 | size_t len); | |
56 | ||
57 | ||
58 | static int wpa_supplicant_ctrl_iface_attach(struct ctrl_iface_priv *priv, | |
59 | struct sockaddr_un *from, | |
60 | socklen_t fromlen) | |
61 | { | |
62 | struct wpa_ctrl_dst *dst; | |
63 | ||
64 | dst = os_zalloc(sizeof(*dst)); | |
65 | if (dst == NULL) | |
66 | return -1; | |
67 | os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un)); | |
68 | dst->addrlen = fromlen; | |
69 | dst->debug_level = MSG_INFO; | |
09e47a07 | 70 | dl_list_add(&priv->ctrl_dst, &dst->list); |
6fc6879b | 71 | wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached", |
19b9436c SL |
72 | (u8 *) from->sun_path, |
73 | fromlen - offsetof(struct sockaddr_un, sun_path)); | |
6fc6879b JM |
74 | return 0; |
75 | } | |
76 | ||
77 | ||
78 | static int wpa_supplicant_ctrl_iface_detach(struct ctrl_iface_priv *priv, | |
79 | struct sockaddr_un *from, | |
80 | socklen_t fromlen) | |
81 | { | |
09e47a07 | 82 | struct wpa_ctrl_dst *dst; |
6fc6879b | 83 | |
09e47a07 | 84 | dl_list_for_each(dst, &priv->ctrl_dst, struct wpa_ctrl_dst, list) { |
6fc6879b JM |
85 | if (fromlen == dst->addrlen && |
86 | os_memcmp(from->sun_path, dst->addr.sun_path, | |
19b9436c SL |
87 | fromlen - offsetof(struct sockaddr_un, sun_path)) |
88 | == 0) { | |
09e47a07 | 89 | dl_list_del(&dst->list); |
6fc6879b JM |
90 | os_free(dst); |
91 | wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached", | |
92 | (u8 *) from->sun_path, | |
19b9436c SL |
93 | fromlen - |
94 | offsetof(struct sockaddr_un, sun_path)); | |
6fc6879b JM |
95 | return 0; |
96 | } | |
6fc6879b JM |
97 | } |
98 | return -1; | |
99 | } | |
100 | ||
101 | ||
102 | static int wpa_supplicant_ctrl_iface_level(struct ctrl_iface_priv *priv, | |
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 | ||
09e47a07 | 111 | dl_list_for_each(dst, &priv->ctrl_dst, struct wpa_ctrl_dst, list) { |
6fc6879b JM |
112 | if (fromlen == dst->addrlen && |
113 | os_memcmp(from->sun_path, dst->addr.sun_path, | |
19b9436c SL |
114 | fromlen - offsetof(struct sockaddr_un, sun_path)) |
115 | == 0) { | |
6fc6879b JM |
116 | wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor " |
117 | "level", (u8 *) from->sun_path, | |
19b9436c SL |
118 | fromlen - |
119 | offsetof(struct sockaddr_un, sun_path)); | |
6fc6879b JM |
120 | dst->debug_level = atoi(level); |
121 | return 0; | |
122 | } | |
6fc6879b JM |
123 | } |
124 | ||
125 | return -1; | |
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 JM |
135 | int res; |
136 | struct sockaddr_un from; | |
137 | socklen_t fromlen = sizeof(from); | |
138 | char *reply = NULL; | |
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) { | |
145 | perror("recvfrom(ctrl_iface)"); | |
146 | return; | |
147 | } | |
148 | buf[res] = '\0'; | |
149 | ||
150 | if (os_strcmp(buf, "ATTACH") == 0) { | |
151 | if (wpa_supplicant_ctrl_iface_attach(priv, &from, fromlen)) | |
152 | reply_len = 1; | |
153 | else { | |
154 | new_attached = 1; | |
155 | reply_len = 2; | |
156 | } | |
157 | } else if (os_strcmp(buf, "DETACH") == 0) { | |
158 | if (wpa_supplicant_ctrl_iface_detach(priv, &from, fromlen)) | |
159 | reply_len = 1; | |
160 | else | |
161 | reply_len = 2; | |
162 | } else if (os_strncmp(buf, "LEVEL ", 6) == 0) { | |
163 | if (wpa_supplicant_ctrl_iface_level(priv, &from, fromlen, | |
164 | buf + 6)) | |
165 | reply_len = 1; | |
166 | else | |
167 | reply_len = 2; | |
168 | } else { | |
169 | reply = wpa_supplicant_ctrl_iface_process(wpa_s, buf, | |
170 | &reply_len); | |
171 | } | |
172 | ||
173 | if (reply) { | |
174 | sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, | |
175 | fromlen); | |
176 | os_free(reply); | |
177 | } else if (reply_len == 1) { | |
178 | sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from, | |
179 | fromlen); | |
180 | } else if (reply_len == 2) { | |
181 | sendto(sock, "OK\n", 3, 0, (struct sockaddr *) &from, | |
182 | fromlen); | |
183 | } | |
184 | ||
185 | if (new_attached) | |
186 | eapol_sm_notify_ctrl_attached(wpa_s->eapol); | |
187 | } | |
188 | ||
189 | ||
190 | static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s) | |
191 | { | |
192 | char *buf; | |
193 | size_t len; | |
194 | char *pbuf, *dir = NULL, *gid_str = NULL; | |
195 | int res; | |
196 | ||
197 | if (wpa_s->conf->ctrl_interface == NULL) | |
198 | return NULL; | |
199 | ||
200 | pbuf = os_strdup(wpa_s->conf->ctrl_interface); | |
201 | if (pbuf == NULL) | |
202 | return NULL; | |
203 | if (os_strncmp(pbuf, "DIR=", 4) == 0) { | |
204 | dir = pbuf + 4; | |
205 | gid_str = os_strstr(dir, " GROUP="); | |
206 | if (gid_str) { | |
207 | *gid_str = '\0'; | |
208 | gid_str += 7; | |
209 | } | |
210 | } else | |
211 | dir = pbuf; | |
212 | ||
213 | len = os_strlen(dir) + os_strlen(wpa_s->ifname) + 2; | |
214 | buf = os_malloc(len); | |
215 | if (buf == NULL) { | |
216 | os_free(pbuf); | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | res = os_snprintf(buf, len, "%s/%s", dir, wpa_s->ifname); | |
221 | if (res < 0 || (size_t) res >= len) { | |
222 | os_free(pbuf); | |
223 | os_free(buf); | |
224 | return NULL; | |
225 | } | |
226 | #ifdef __CYGWIN__ | |
227 | { | |
228 | /* Windows/WinPcap uses interface names that are not suitable | |
229 | * as a file name - convert invalid chars to underscores */ | |
230 | char *pos = buf; | |
231 | while (*pos) { | |
232 | if (*pos == '\\') | |
233 | *pos = '_'; | |
234 | pos++; | |
235 | } | |
236 | } | |
237 | #endif /* __CYGWIN__ */ | |
238 | os_free(pbuf); | |
239 | return buf; | |
240 | } | |
241 | ||
242 | ||
243 | static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level, | |
244 | const char *txt, size_t len) | |
245 | { | |
246 | struct wpa_supplicant *wpa_s = ctx; | |
247 | if (wpa_s == NULL || wpa_s->ctrl_iface == NULL) | |
248 | return; | |
249 | wpa_supplicant_ctrl_iface_send(wpa_s->ctrl_iface, level, txt, len); | |
250 | } | |
251 | ||
252 | ||
253 | struct ctrl_iface_priv * | |
254 | wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s) | |
255 | { | |
256 | struct ctrl_iface_priv *priv; | |
257 | struct sockaddr_un addr; | |
258 | char *fname = NULL; | |
259 | gid_t gid = 0; | |
260 | int gid_set = 0; | |
261 | char *buf, *dir = NULL, *gid_str = NULL; | |
262 | struct group *grp; | |
263 | char *endp; | |
4fdc8def | 264 | int flags; |
6fc6879b JM |
265 | |
266 | priv = os_zalloc(sizeof(*priv)); | |
267 | if (priv == NULL) | |
268 | return NULL; | |
09e47a07 | 269 | dl_list_init(&priv->ctrl_dst); |
6fc6879b JM |
270 | priv->wpa_s = wpa_s; |
271 | priv->sock = -1; | |
272 | ||
273 | if (wpa_s->conf->ctrl_interface == NULL) | |
274 | return priv; | |
275 | ||
276 | buf = os_strdup(wpa_s->conf->ctrl_interface); | |
277 | if (buf == NULL) | |
278 | goto fail; | |
b3f3865e DS |
279 | #ifdef ANDROID |
280 | os_snprintf(addr.sun_path, sizeof(addr.sun_path), "wpa_%s", | |
281 | wpa_s->conf->ctrl_interface); | |
282 | priv->sock = android_get_control_socket(addr.sun_path); | |
283 | if (priv->sock >= 0) | |
284 | goto havesock; | |
285 | #endif /* ANDROID */ | |
6fc6879b JM |
286 | if (os_strncmp(buf, "DIR=", 4) == 0) { |
287 | dir = buf + 4; | |
288 | gid_str = os_strstr(dir, " GROUP="); | |
289 | if (gid_str) { | |
290 | *gid_str = '\0'; | |
291 | gid_str += 7; | |
292 | } | |
293 | } else { | |
294 | dir = buf; | |
295 | gid_str = wpa_s->conf->ctrl_interface_group; | |
296 | } | |
297 | ||
298 | if (mkdir(dir, S_IRWXU | S_IRWXG) < 0) { | |
299 | if (errno == EEXIST) { | |
300 | wpa_printf(MSG_DEBUG, "Using existing control " | |
301 | "interface directory."); | |
302 | } else { | |
303 | perror("mkdir[ctrl_interface]"); | |
304 | goto fail; | |
305 | } | |
306 | } | |
307 | ||
308 | if (gid_str) { | |
309 | grp = getgrnam(gid_str); | |
310 | if (grp) { | |
311 | gid = grp->gr_gid; | |
312 | gid_set = 1; | |
313 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d" | |
314 | " (from group name '%s')", | |
315 | (int) gid, gid_str); | |
316 | } else { | |
317 | /* Group name not found - try to parse this as gid */ | |
318 | gid = strtol(gid_str, &endp, 10); | |
319 | if (*gid_str == '\0' || *endp != '\0') { | |
8e888179 | 320 | wpa_printf(MSG_ERROR, "CTRL: Invalid group " |
6fc6879b JM |
321 | "'%s'", gid_str); |
322 | goto fail; | |
323 | } | |
324 | gid_set = 1; | |
325 | wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d", | |
326 | (int) gid); | |
327 | } | |
328 | } | |
329 | ||
330 | if (gid_set && chown(dir, -1, gid) < 0) { | |
331 | perror("chown[ctrl_interface]"); | |
332 | goto fail; | |
333 | } | |
334 | ||
3fd2a226 AAS |
335 | /* Make sure the group can enter and read the directory */ |
336 | if (gid_set && | |
337 | chmod(dir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP) < 0) { | |
338 | wpa_printf(MSG_ERROR, "CTRL: chmod[ctrl_interface]: %s", | |
339 | strerror(errno)); | |
340 | goto fail; | |
341 | } | |
342 | ||
6fc6879b JM |
343 | if (os_strlen(dir) + 1 + os_strlen(wpa_s->ifname) >= |
344 | sizeof(addr.sun_path)) { | |
345 | wpa_printf(MSG_ERROR, "ctrl_iface path limit exceeded"); | |
346 | goto fail; | |
347 | } | |
348 | ||
349 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
350 | if (priv->sock < 0) { | |
351 | perror("socket(PF_UNIX)"); | |
352 | goto fail; | |
353 | } | |
354 | ||
355 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 356 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
357 | addr.sun_len = sizeof(addr); |
358 | #endif /* __FreeBSD__ */ | |
6fc6879b JM |
359 | addr.sun_family = AF_UNIX; |
360 | fname = wpa_supplicant_ctrl_iface_path(wpa_s); | |
361 | if (fname == NULL) | |
362 | goto fail; | |
363 | os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path)); | |
364 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
365 | wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s", | |
366 | strerror(errno)); | |
367 | if (connect(priv->sock, (struct sockaddr *) &addr, | |
368 | sizeof(addr)) < 0) { | |
369 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
370 | " allow connections - assuming it was left" | |
371 | "over from forced program termination"); | |
372 | if (unlink(fname) < 0) { | |
373 | perror("unlink[ctrl_iface]"); | |
374 | wpa_printf(MSG_ERROR, "Could not unlink " | |
375 | "existing ctrl_iface socket '%s'", | |
376 | fname); | |
377 | goto fail; | |
378 | } | |
379 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
380 | sizeof(addr)) < 0) { | |
9d053747 | 381 | perror("supp-ctrl-iface-init: bind(PF_UNIX)"); |
6fc6879b JM |
382 | goto fail; |
383 | } | |
384 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
385 | "ctrl_iface socket '%s'", fname); | |
386 | } else { | |
387 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
388 | "be in use - cannot override it"); | |
389 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
390 | "not used anymore", fname); | |
391 | os_free(fname); | |
392 | fname = NULL; | |
393 | goto fail; | |
394 | } | |
395 | } | |
396 | ||
397 | if (gid_set && chown(fname, -1, gid) < 0) { | |
398 | perror("chown[ctrl_interface/ifname]"); | |
399 | goto fail; | |
400 | } | |
401 | ||
402 | if (chmod(fname, S_IRWXU | S_IRWXG) < 0) { | |
403 | perror("chmod[ctrl_interface/ifname]"); | |
404 | goto fail; | |
405 | } | |
406 | os_free(fname); | |
407 | ||
b3f3865e DS |
408 | #ifdef ANDROID |
409 | havesock: | |
410 | #endif /* ANDROID */ | |
4fdc8def BG |
411 | |
412 | /* | |
413 | * Make socket non-blocking so that we don't hang forever if | |
414 | * target dies unexpectedly. | |
415 | */ | |
416 | flags = fcntl(priv->sock, F_GETFL); | |
417 | if (flags >= 0) { | |
418 | flags |= O_NONBLOCK; | |
419 | if (fcntl(priv->sock, F_SETFL, flags) < 0) { | |
420 | perror("fcntl(ctrl, O_NONBLOCK)"); | |
421 | /* Not fatal, continue on.*/ | |
422 | } | |
423 | } | |
424 | ||
6fc6879b JM |
425 | eloop_register_read_sock(priv->sock, wpa_supplicant_ctrl_iface_receive, |
426 | wpa_s, priv); | |
427 | wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb); | |
428 | ||
429 | os_free(buf); | |
430 | return priv; | |
431 | ||
432 | fail: | |
433 | if (priv->sock >= 0) | |
434 | close(priv->sock); | |
435 | os_free(priv); | |
436 | if (fname) { | |
437 | unlink(fname); | |
438 | os_free(fname); | |
439 | } | |
440 | os_free(buf); | |
441 | return NULL; | |
442 | } | |
443 | ||
444 | ||
445 | void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv) | |
446 | { | |
447 | struct wpa_ctrl_dst *dst, *prev; | |
448 | ||
449 | if (priv->sock > -1) { | |
450 | char *fname; | |
451 | char *buf, *dir = NULL, *gid_str = NULL; | |
452 | eloop_unregister_read_sock(priv->sock); | |
09e47a07 | 453 | if (!dl_list_empty(&priv->ctrl_dst)) { |
6fc6879b JM |
454 | /* |
455 | * Wait a second before closing the control socket if | |
456 | * there are any attached monitors in order to allow | |
457 | * them to receive any pending messages. | |
458 | */ | |
459 | wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached " | |
460 | "monitors to receive messages"); | |
461 | os_sleep(1, 0); | |
462 | } | |
463 | close(priv->sock); | |
464 | priv->sock = -1; | |
465 | fname = wpa_supplicant_ctrl_iface_path(priv->wpa_s); | |
466 | if (fname) { | |
467 | unlink(fname); | |
468 | os_free(fname); | |
469 | } | |
470 | ||
471 | buf = os_strdup(priv->wpa_s->conf->ctrl_interface); | |
472 | if (buf == NULL) | |
473 | goto free_dst; | |
474 | if (os_strncmp(buf, "DIR=", 4) == 0) { | |
475 | dir = buf + 4; | |
476 | gid_str = os_strstr(dir, " GROUP="); | |
477 | if (gid_str) { | |
478 | *gid_str = '\0'; | |
479 | gid_str += 7; | |
480 | } | |
481 | } else | |
482 | dir = buf; | |
483 | ||
484 | if (rmdir(dir) < 0) { | |
485 | if (errno == ENOTEMPTY) { | |
486 | wpa_printf(MSG_DEBUG, "Control interface " | |
487 | "directory not empty - leaving it " | |
488 | "behind"); | |
489 | } else { | |
490 | perror("rmdir[ctrl_interface]"); | |
491 | } | |
492 | } | |
493 | os_free(buf); | |
494 | } | |
495 | ||
496 | free_dst: | |
09e47a07 JM |
497 | dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst, |
498 | list) | |
499 | os_free(dst); | |
6fc6879b JM |
500 | os_free(priv); |
501 | } | |
502 | ||
503 | ||
504 | /** | |
505 | * wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors | |
506 | * @priv: Pointer to private data from wpa_supplicant_ctrl_iface_init() | |
507 | * @level: Priority level of the message | |
508 | * @buf: Message data | |
509 | * @len: Message length | |
510 | * | |
511 | * Send a packet to all monitor programs attached to the control interface. | |
512 | */ | |
513 | static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv, | |
514 | int level, const char *buf, | |
515 | size_t len) | |
516 | { | |
517 | struct wpa_ctrl_dst *dst, *next; | |
518 | char levelstr[10]; | |
519 | int idx, res; | |
520 | struct msghdr msg; | |
521 | struct iovec io[2]; | |
522 | ||
09e47a07 | 523 | if (priv->sock < 0 || dl_list_empty(&priv->ctrl_dst)) |
6fc6879b JM |
524 | return; |
525 | ||
526 | res = os_snprintf(levelstr, sizeof(levelstr), "<%d>", level); | |
527 | if (res < 0 || (size_t) res >= sizeof(levelstr)) | |
528 | return; | |
529 | io[0].iov_base = levelstr; | |
530 | io[0].iov_len = os_strlen(levelstr); | |
531 | io[1].iov_base = (char *) buf; | |
532 | io[1].iov_len = len; | |
533 | os_memset(&msg, 0, sizeof(msg)); | |
534 | msg.msg_iov = io; | |
535 | msg.msg_iovlen = 2; | |
536 | ||
537 | idx = 0; | |
09e47a07 JM |
538 | dl_list_for_each_safe(dst, next, &priv->ctrl_dst, struct wpa_ctrl_dst, |
539 | list) { | |
6fc6879b JM |
540 | if (level >= dst->debug_level) { |
541 | wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send", | |
542 | (u8 *) dst->addr.sun_path, dst->addrlen - | |
19b9436c | 543 | offsetof(struct sockaddr_un, sun_path)); |
6fc6879b JM |
544 | msg.msg_name = (void *) &dst->addr; |
545 | msg.msg_namelen = dst->addrlen; | |
546 | if (sendmsg(priv->sock, &msg, 0) < 0) { | |
c5aaa015 JM |
547 | int _errno = errno; |
548 | wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: " | |
549 | "%d - %s", | |
550 | idx, errno, strerror(errno)); | |
6fc6879b | 551 | dst->errors++; |
6700a277 JM |
552 | if (dst->errors > 1000 || |
553 | (_errno != ENOBUFS && dst->errors > 10) || | |
554 | _errno == ENOENT) { | |
6fc6879b JM |
555 | wpa_supplicant_ctrl_iface_detach( |
556 | priv, &dst->addr, | |
557 | dst->addrlen); | |
558 | } | |
559 | } else | |
560 | dst->errors = 0; | |
561 | } | |
562 | idx++; | |
6fc6879b JM |
563 | } |
564 | } | |
565 | ||
566 | ||
567 | void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv) | |
568 | { | |
569 | char buf[256]; | |
570 | int res; | |
571 | struct sockaddr_un from; | |
572 | socklen_t fromlen = sizeof(from); | |
573 | ||
574 | for (;;) { | |
575 | wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor to " | |
576 | "attach", priv->wpa_s->ifname); | |
577 | eloop_wait_for_read_sock(priv->sock); | |
578 | ||
579 | res = recvfrom(priv->sock, buf, sizeof(buf) - 1, 0, | |
580 | (struct sockaddr *) &from, &fromlen); | |
581 | if (res < 0) { | |
582 | perror("recvfrom(ctrl_iface)"); | |
583 | continue; | |
584 | } | |
585 | buf[res] = '\0'; | |
586 | ||
587 | if (os_strcmp(buf, "ATTACH") == 0) { | |
588 | /* handle ATTACH signal of first monitor interface */ | |
589 | if (!wpa_supplicant_ctrl_iface_attach(priv, &from, | |
590 | fromlen)) { | |
591 | sendto(priv->sock, "OK\n", 3, 0, | |
592 | (struct sockaddr *) &from, fromlen); | |
593 | /* OK to continue */ | |
594 | return; | |
595 | } else { | |
596 | sendto(priv->sock, "FAIL\n", 5, 0, | |
597 | (struct sockaddr *) &from, fromlen); | |
598 | } | |
599 | } else { | |
600 | /* return FAIL for all other signals */ | |
601 | sendto(priv->sock, "FAIL\n", 5, 0, | |
602 | (struct sockaddr *) &from, fromlen); | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | ||
608 | /* Global ctrl_iface */ | |
609 | ||
610 | struct ctrl_iface_global_priv { | |
611 | struct wpa_global *global; | |
612 | int sock; | |
613 | }; | |
614 | ||
615 | ||
616 | static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx, | |
617 | void *sock_ctx) | |
618 | { | |
619 | struct wpa_global *global = eloop_ctx; | |
620 | char buf[256]; | |
621 | int res; | |
622 | struct sockaddr_un from; | |
623 | socklen_t fromlen = sizeof(from); | |
624 | char *reply; | |
625 | size_t reply_len; | |
626 | ||
627 | res = recvfrom(sock, buf, sizeof(buf) - 1, 0, | |
628 | (struct sockaddr *) &from, &fromlen); | |
629 | if (res < 0) { | |
630 | perror("recvfrom(ctrl_iface)"); | |
631 | return; | |
632 | } | |
633 | buf[res] = '\0'; | |
634 | ||
635 | reply = wpa_supplicant_global_ctrl_iface_process(global, buf, | |
636 | &reply_len); | |
637 | ||
638 | if (reply) { | |
639 | sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, | |
640 | fromlen); | |
641 | os_free(reply); | |
642 | } else if (reply_len) { | |
643 | sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from, | |
644 | fromlen); | |
645 | } | |
646 | } | |
647 | ||
648 | ||
649 | struct ctrl_iface_global_priv * | |
650 | wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global) | |
651 | { | |
652 | struct ctrl_iface_global_priv *priv; | |
653 | struct sockaddr_un addr; | |
654 | ||
655 | priv = os_zalloc(sizeof(*priv)); | |
656 | if (priv == NULL) | |
657 | return NULL; | |
658 | priv->global = global; | |
659 | priv->sock = -1; | |
660 | ||
661 | if (global->params.ctrl_interface == NULL) | |
662 | return priv; | |
663 | ||
b3f3865e DS |
664 | #ifdef ANDROID |
665 | priv->sock = android_get_control_socket(global->params.ctrl_interface); | |
666 | if (priv->sock >= 0) | |
667 | goto havesock; | |
668 | #endif /* ANDROID */ | |
669 | ||
6fc6879b JM |
670 | wpa_printf(MSG_DEBUG, "Global control interface '%s'", |
671 | global->params.ctrl_interface); | |
672 | ||
673 | priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0); | |
674 | if (priv->sock < 0) { | |
675 | perror("socket(PF_UNIX)"); | |
676 | goto fail; | |
677 | } | |
678 | ||
679 | os_memset(&addr, 0, sizeof(addr)); | |
09bd6e8c | 680 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
19b9436c SL |
681 | addr.sun_len = sizeof(addr); |
682 | #endif /* __FreeBSD__ */ | |
6fc6879b JM |
683 | addr.sun_family = AF_UNIX; |
684 | os_strlcpy(addr.sun_path, global->params.ctrl_interface, | |
685 | sizeof(addr.sun_path)); | |
686 | if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
9d053747 BG |
687 | perror("supp-global-ctrl-iface-init (will try fixup): " |
688 | "bind(PF_UNIX)"); | |
6fc6879b JM |
689 | if (connect(priv->sock, (struct sockaddr *) &addr, |
690 | sizeof(addr)) < 0) { | |
691 | wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not" | |
692 | " allow connections - assuming it was left" | |
693 | "over from forced program termination"); | |
694 | if (unlink(global->params.ctrl_interface) < 0) { | |
695 | perror("unlink[ctrl_iface]"); | |
696 | wpa_printf(MSG_ERROR, "Could not unlink " | |
697 | "existing ctrl_iface socket '%s'", | |
698 | global->params.ctrl_interface); | |
699 | goto fail; | |
700 | } | |
701 | if (bind(priv->sock, (struct sockaddr *) &addr, | |
702 | sizeof(addr)) < 0) { | |
9d053747 | 703 | perror("supp-glb-iface-init: bind(PF_UNIX)"); |
6fc6879b JM |
704 | goto fail; |
705 | } | |
706 | wpa_printf(MSG_DEBUG, "Successfully replaced leftover " | |
707 | "ctrl_iface socket '%s'", | |
708 | global->params.ctrl_interface); | |
709 | } else { | |
710 | wpa_printf(MSG_INFO, "ctrl_iface exists and seems to " | |
711 | "be in use - cannot override it"); | |
712 | wpa_printf(MSG_INFO, "Delete '%s' manually if it is " | |
713 | "not used anymore", | |
714 | global->params.ctrl_interface); | |
715 | goto fail; | |
716 | } | |
717 | } | |
718 | ||
b3f3865e DS |
719 | #ifdef ANDROID |
720 | havesock: | |
721 | #endif /* ANDROID */ | |
6fc6879b JM |
722 | eloop_register_read_sock(priv->sock, |
723 | wpa_supplicant_global_ctrl_iface_receive, | |
724 | global, NULL); | |
725 | ||
726 | return priv; | |
727 | ||
728 | fail: | |
729 | if (priv->sock >= 0) | |
730 | close(priv->sock); | |
731 | os_free(priv); | |
732 | return NULL; | |
733 | } | |
734 | ||
735 | ||
736 | void | |
737 | wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv) | |
738 | { | |
739 | if (priv->sock >= 0) { | |
740 | eloop_unregister_read_sock(priv->sock); | |
741 | close(priv->sock); | |
742 | } | |
743 | if (priv->global->params.ctrl_interface) | |
744 | unlink(priv->global->params.ctrl_interface); | |
745 | os_free(priv); | |
746 | } |