2 * WPA Supplicant / UNIX domain socket -based control interface
3 * Copyright (c) 2004-2014, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
17 #include <cutils/sockets.h>
20 #include "utils/common.h"
21 #include "utils/eloop.h"
22 #include "utils/list.h"
23 #include "eapol_supp/eapol_supp_sm.h"
25 #include "wpa_supplicant_i.h"
26 #include "ctrl_iface.h"
28 /* Per-interface ctrl_iface */
31 * struct wpa_ctrl_dst - Internal data structure of control interface monitors
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.
39 struct sockaddr_un addr;
46 struct ctrl_iface_priv {
47 struct wpa_supplicant *wpa_s;
49 struct dl_list ctrl_dst;
50 int android_control_socket;
54 struct ctrl_iface_global_priv {
55 struct wpa_global *global;
57 struct dl_list ctrl_dst;
58 int android_control_socket;
62 static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s,
63 const char *ifname, int sock,
64 struct dl_list *ctrl_dst,
65 int level, const char *buf,
67 struct ctrl_iface_priv *priv,
68 struct ctrl_iface_global_priv *gp);
69 static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s,
70 struct ctrl_iface_priv *priv);
71 static int wpas_ctrl_iface_global_reinit(struct wpa_global *global,
72 struct ctrl_iface_global_priv *priv);
75 static int wpa_supplicant_ctrl_iface_attach(struct dl_list *ctrl_dst,
76 struct sockaddr_un *from,
77 socklen_t fromlen, int global)
79 struct wpa_ctrl_dst *dst;
82 dst = os_zalloc(sizeof(*dst));
85 os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
86 dst->addrlen = fromlen;
87 dst->debug_level = MSG_INFO;
88 dl_list_add(ctrl_dst, &dst->list);
89 printf_encode(addr_txt, sizeof(addr_txt),
90 (u8 *) from->sun_path,
91 fromlen - offsetof(struct sockaddr_un, sun_path));
92 wpa_printf(MSG_DEBUG, "CTRL_IFACE %smonitor attached %s",
93 global ? "global " : "", addr_txt);
98 static int wpa_supplicant_ctrl_iface_detach(struct dl_list *ctrl_dst,
99 struct sockaddr_un *from,
102 struct wpa_ctrl_dst *dst;
104 dl_list_for_each(dst, ctrl_dst, struct wpa_ctrl_dst, list) {
105 if (fromlen == dst->addrlen &&
106 os_memcmp(from->sun_path, dst->addr.sun_path,
107 fromlen - offsetof(struct sockaddr_un, sun_path))
110 printf_encode(addr_txt, sizeof(addr_txt),
111 (u8 *) from->sun_path,
113 offsetof(struct sockaddr_un, sun_path));
114 wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor detached %s",
116 dl_list_del(&dst->list);
125 static int wpa_supplicant_ctrl_iface_level(struct ctrl_iface_priv *priv,
126 struct sockaddr_un *from,
130 struct wpa_ctrl_dst *dst;
132 wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
134 dl_list_for_each(dst, &priv->ctrl_dst, struct wpa_ctrl_dst, list) {
135 if (fromlen == dst->addrlen &&
136 os_memcmp(from->sun_path, dst->addr.sun_path,
137 fromlen - offsetof(struct sockaddr_un, sun_path))
140 dst->debug_level = atoi(level);
141 printf_encode(addr_txt, sizeof(addr_txt),
142 (u8 *) from->sun_path, fromlen -
143 offsetof(struct sockaddr_un, sun_path));
144 wpa_printf(MSG_DEBUG, "CTRL_IFACE changed monitor level to %d for %s",
145 dst->debug_level, addr_txt);
154 static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx,
157 struct wpa_supplicant *wpa_s = eloop_ctx;
158 struct ctrl_iface_priv *priv = sock_ctx;
161 struct sockaddr_un from;
162 socklen_t fromlen = sizeof(from);
163 char *reply = NULL, *reply_buf = NULL;
164 size_t reply_len = 0;
165 int new_attached = 0;
167 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
168 (struct sockaddr *) &from, &fromlen);
170 wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
176 if (os_strcmp(buf, "ATTACH") == 0) {
177 if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from,
184 } else if (os_strcmp(buf, "DETACH") == 0) {
185 if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from,
190 } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
191 if (wpa_supplicant_ctrl_iface_level(priv, &from, fromlen,
197 reply_buf = wpa_supplicant_ctrl_iface_process(wpa_s, buf,
202 * There could be some password/key material in the command, so
203 * clear the buffer explicitly now that it is not needed
206 os_memset(buf, 0, res);
209 if (!reply && reply_len == 1) {
212 } else if (!reply && reply_len == 2) {
218 if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
221 wpa_dbg(wpa_s, MSG_DEBUG,
222 "ctrl_iface sendto failed: %d - %s",
223 _errno, strerror(_errno));
224 if (_errno == ENOBUFS || _errno == EAGAIN) {
226 * The socket send buffer could be full. This
227 * may happen if client programs are not
228 * receiving their pending messages. Close and
229 * reopen the socket as a workaround to avoid
230 * getting stuck being unable to send any new
233 sock = wpas_ctrl_iface_reinit(wpa_s, priv);
235 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to reinitialize ctrl_iface socket");
239 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to send response to ATTACH - detaching");
241 wpa_supplicant_ctrl_iface_detach(
242 &priv->ctrl_dst, &from, fromlen);
249 eapol_sm_notify_ctrl_attached(wpa_s->eapol);
253 static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s)
257 char *pbuf, *dir = NULL;
260 if (wpa_s->conf->ctrl_interface == NULL)
263 pbuf = os_strdup(wpa_s->conf->ctrl_interface);
266 if (os_strncmp(pbuf, "DIR=", 4) == 0) {
269 gid_str = os_strstr(dir, " GROUP=");
275 len = os_strlen(dir) + os_strlen(wpa_s->ifname) + 2;
276 buf = os_malloc(len);
282 res = os_snprintf(buf, len, "%s/%s", dir, wpa_s->ifname);
283 if (os_snprintf_error(len, res)) {
290 /* Windows/WinPcap uses interface names that are not suitable
291 * as a file name - convert invalid chars to underscores */
299 #endif /* __CYGWIN__ */
305 static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level,
306 enum wpa_msg_type type,
307 const char *txt, size_t len)
309 struct wpa_supplicant *wpa_s = ctx;
314 if (type != WPA_MSG_NO_GLOBAL && wpa_s->global->ctrl_iface) {
315 struct ctrl_iface_global_priv *priv = wpa_s->global->ctrl_iface;
316 if (!dl_list_empty(&priv->ctrl_dst)) {
317 wpa_supplicant_ctrl_iface_send(
319 type != WPA_MSG_PER_INTERFACE ?
320 NULL : wpa_s->ifname,
321 priv->sock, &priv->ctrl_dst, level, txt, len,
326 if (type == WPA_MSG_ONLY_GLOBAL || wpa_s->ctrl_iface == NULL)
328 wpa_supplicant_ctrl_iface_send(wpa_s, NULL, wpa_s->ctrl_iface->sock,
329 &wpa_s->ctrl_iface->ctrl_dst,
330 level, txt, len, wpa_s->ctrl_iface,
335 static int wpas_ctrl_iface_open_sock(struct wpa_supplicant *wpa_s,
336 struct ctrl_iface_priv *priv)
338 struct sockaddr_un addr;
342 char *buf, *dir = NULL, *gid_str = NULL;
347 buf = os_strdup(wpa_s->conf->ctrl_interface);
351 os_snprintf(addr.sun_path, sizeof(addr.sun_path), "wpa_%s",
352 wpa_s->conf->ctrl_interface);
353 priv->sock = android_get_control_socket(addr.sun_path);
354 if (priv->sock >= 0) {
355 priv->android_control_socket = 1;
359 if (os_strncmp(buf, "DIR=", 4) == 0) {
361 gid_str = os_strstr(dir, " GROUP=");
368 gid_str = wpa_s->conf->ctrl_interface_group;
371 if (mkdir(dir, S_IRWXU | S_IRWXG) < 0) {
372 if (errno == EEXIST) {
373 wpa_printf(MSG_DEBUG, "Using existing control "
374 "interface directory.");
376 wpa_printf(MSG_ERROR, "mkdir[ctrl_interface=%s]: %s",
377 dir, strerror(errno));
384 * wpa_supplicant is started from /init.*.rc on Android and that seems
385 * to be using umask 0077 which would leave the control interface
386 * directory without group access. This breaks things since Wi-Fi
387 * framework assumes that this directory can be accessed by other
388 * applications in the wifi group. Fix this by adding group access even
389 * if umask value would prevent this.
391 if (chmod(dir, S_IRWXU | S_IRWXG) < 0) {
392 wpa_printf(MSG_ERROR, "CTRL: Could not chmod directory: %s",
394 /* Try to continue anyway */
399 grp = getgrnam(gid_str);
403 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d"
404 " (from group name '%s')",
407 /* Group name not found - try to parse this as gid */
408 gid = strtol(gid_str, &endp, 10);
409 if (*gid_str == '\0' || *endp != '\0') {
410 wpa_printf(MSG_ERROR, "CTRL: Invalid group "
415 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
420 if (gid_set && chown(dir, -1, gid) < 0) {
421 wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s",
422 dir, (int) gid, strerror(errno));
426 /* Make sure the group can enter and read the directory */
428 chmod(dir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP) < 0) {
429 wpa_printf(MSG_ERROR, "CTRL: chmod[ctrl_interface]: %s",
434 if (os_strlen(dir) + 1 + os_strlen(wpa_s->ifname) >=
435 sizeof(addr.sun_path)) {
436 wpa_printf(MSG_ERROR, "ctrl_iface path limit exceeded");
440 priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
441 if (priv->sock < 0) {
442 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
446 os_memset(&addr, 0, sizeof(addr));
447 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
448 addr.sun_len = sizeof(addr);
449 #endif /* __FreeBSD__ */
450 addr.sun_family = AF_UNIX;
451 fname = wpa_supplicant_ctrl_iface_path(wpa_s);
454 os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
455 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
456 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
458 if (connect(priv->sock, (struct sockaddr *) &addr,
460 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
461 " allow connections - assuming it was left"
462 "over from forced program termination");
463 if (unlink(fname) < 0) {
464 wpa_printf(MSG_ERROR,
465 "Could not unlink existing ctrl_iface socket '%s': %s",
466 fname, strerror(errno));
469 if (bind(priv->sock, (struct sockaddr *) &addr,
471 wpa_printf(MSG_ERROR, "supp-ctrl-iface-init: bind(PF_UNIX): %s",
475 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
476 "ctrl_iface socket '%s'", fname);
478 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
479 "be in use - cannot override it");
480 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
481 "not used anymore", fname);
488 if (gid_set && chown(fname, -1, gid) < 0) {
489 wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s",
490 fname, (int) gid, strerror(errno));
494 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
495 wpa_printf(MSG_ERROR, "chmod[ctrl_interface=%s]: %s",
496 fname, strerror(errno));
506 * Make socket non-blocking so that we don't hang forever if
507 * target dies unexpectedly.
509 flags = fcntl(priv->sock, F_GETFL);
512 if (fcntl(priv->sock, F_SETFL, flags) < 0) {
513 wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s",
515 /* Not fatal, continue on.*/
519 eloop_register_read_sock(priv->sock, wpa_supplicant_ctrl_iface_receive,
521 wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
527 if (priv->sock >= 0) {
540 struct ctrl_iface_priv *
541 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
543 struct ctrl_iface_priv *priv;
545 priv = os_zalloc(sizeof(*priv));
548 dl_list_init(&priv->ctrl_dst);
552 if (wpa_s->conf->ctrl_interface == NULL)
555 if (wpas_ctrl_iface_open_sock(wpa_s, priv) < 0) {
564 static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s,
565 struct ctrl_iface_priv *priv)
573 * On Android, the control socket being used may be the socket
574 * that is created when wpa_supplicant is started as a /init.*.rc
575 * service. Such a socket is maintained as a key-value pair in
576 * Android's environment. Closing this control socket would leave us
577 * in a bad state with an invalid socket descriptor.
579 if (priv->android_control_socket)
582 eloop_unregister_read_sock(priv->sock);
585 res = wpas_ctrl_iface_open_sock(wpa_s, priv);
592 void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
594 struct wpa_ctrl_dst *dst, *prev;
596 if (priv->sock > -1) {
598 char *buf, *dir = NULL;
599 eloop_unregister_read_sock(priv->sock);
600 if (!dl_list_empty(&priv->ctrl_dst)) {
602 * Wait before closing the control socket if
603 * there are any attached monitors in order to allow
604 * them to receive any pending messages.
606 wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached "
607 "monitors to receive messages");
612 fname = wpa_supplicant_ctrl_iface_path(priv->wpa_s);
618 if (priv->wpa_s->conf->ctrl_interface == NULL)
620 buf = os_strdup(priv->wpa_s->conf->ctrl_interface);
623 if (os_strncmp(buf, "DIR=", 4) == 0) {
626 gid_str = os_strstr(dir, " GROUP=");
632 if (rmdir(dir) < 0) {
633 if (errno == ENOTEMPTY) {
634 wpa_printf(MSG_DEBUG, "Control interface "
635 "directory not empty - leaving it "
638 wpa_printf(MSG_ERROR,
639 "rmdir[ctrl_interface=%s]: %s",
640 dir, strerror(errno));
647 dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst,
655 * wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors
656 * @ifname: Interface name for global control socket or %NULL
657 * @sock: Local socket fd
658 * @ctrl_dst: List of attached listeners
659 * @level: Priority level of the message
661 * @len: Message length
663 * Send a packet to all monitor programs attached to the control interface.
665 static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s,
666 const char *ifname, int sock,
667 struct dl_list *ctrl_dst,
668 int level, const char *buf,
670 struct ctrl_iface_priv *priv,
671 struct ctrl_iface_global_priv *gp)
673 struct wpa_ctrl_dst *dst, *next;
679 if (sock < 0 || dl_list_empty(ctrl_dst))
682 res = os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
683 if (os_snprintf_error(sizeof(levelstr), res))
687 io[idx].iov_base = "IFNAME=";
690 io[idx].iov_base = (char *) ifname;
691 io[idx].iov_len = os_strlen(ifname);
693 io[idx].iov_base = " ";
697 io[idx].iov_base = levelstr;
698 io[idx].iov_len = os_strlen(levelstr);
700 io[idx].iov_base = (char *) buf;
701 io[idx].iov_len = len;
703 os_memset(&msg, 0, sizeof(msg));
705 msg.msg_iovlen = idx;
707 dl_list_for_each_safe(dst, next, ctrl_dst, struct wpa_ctrl_dst, list) {
711 if (level < dst->debug_level)
714 printf_encode(addr_txt, sizeof(addr_txt),
715 (u8 *) dst->addr.sun_path, dst->addrlen -
716 offsetof(struct sockaddr_un, sun_path));
717 msg.msg_name = (void *) &dst->addr;
718 msg.msg_namelen = dst->addrlen;
719 if (sendmsg(sock, &msg, MSG_DONTWAIT) >= 0) {
720 wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor sent successfully to %s",
727 wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor[%s]: %d - %s",
728 addr_txt, errno, strerror(errno));
731 if (dst->errors > 10 || _errno == ENOENT || _errno == EPERM) {
732 wpa_printf(MSG_INFO, "CTRL_IFACE: Detach monitor %s that cannot receive messages",
734 wpa_supplicant_ctrl_iface_detach(ctrl_dst, &dst->addr,
738 if (_errno == ENOBUFS || _errno == EAGAIN) {
740 * The socket send buffer could be full. This may happen
741 * if client programs are not receiving their pending
742 * messages. Close and reopen the socket as a workaround
743 * to avoid getting stuck being unable to send any new
747 sock = wpas_ctrl_iface_reinit(wpa_s, priv);
749 sock = wpas_ctrl_iface_global_reinit(
754 wpa_dbg(wpa_s, MSG_DEBUG,
755 "Failed to reinitialize ctrl_iface socket");
763 void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
767 struct sockaddr_un from;
768 socklen_t fromlen = sizeof(from);
771 wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor to "
772 "attach", priv->wpa_s->ifname);
773 eloop_wait_for_read_sock(priv->sock);
775 res = recvfrom(priv->sock, buf, sizeof(buf) - 1, 0,
776 (struct sockaddr *) &from, &fromlen);
778 wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
784 if (os_strcmp(buf, "ATTACH") == 0) {
785 /* handle ATTACH signal of first monitor interface */
786 if (!wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst,
789 if (sendto(priv->sock, "OK\n", 3, 0,
790 (struct sockaddr *) &from, fromlen) <
792 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
798 if (sendto(priv->sock, "FAIL\n", 5, 0,
799 (struct sockaddr *) &from, fromlen) <
801 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
806 /* return FAIL for all other signals */
807 if (sendto(priv->sock, "FAIL\n", 5, 0,
808 (struct sockaddr *) &from, fromlen) < 0) {
809 wpa_printf(MSG_DEBUG,
810 "ctrl_iface sendto failed: %s",
818 /* Global ctrl_iface */
820 static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
823 struct wpa_global *global = eloop_ctx;
824 struct ctrl_iface_global_priv *priv = sock_ctx;
827 struct sockaddr_un from;
828 socklen_t fromlen = sizeof(from);
829 char *reply = NULL, *reply_buf = NULL;
832 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
833 (struct sockaddr *) &from, &fromlen);
835 wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
841 if (os_strcmp(buf, "ATTACH") == 0) {
842 if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from,
847 } else if (os_strcmp(buf, "DETACH") == 0) {
848 if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from,
854 reply_buf = wpa_supplicant_global_ctrl_iface_process(
855 global, buf, &reply_len);
859 * There could be some password/key material in the command, so
860 * clear the buffer explicitly now that it is not needed
863 os_memset(buf, 0, res);
866 if (!reply && reply_len == 1) {
869 } else if (!reply && reply_len == 2) {
875 if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
877 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
885 static int wpas_global_ctrl_iface_open_sock(struct wpa_global *global,
886 struct ctrl_iface_global_priv *priv)
888 struct sockaddr_un addr;
889 const char *ctrl = global->params.ctrl_interface;
892 wpa_printf(MSG_DEBUG, "Global control interface '%s'", ctrl);
895 if (os_strncmp(ctrl, "@android:", 9) == 0) {
896 priv->sock = android_get_control_socket(ctrl + 9);
897 if (priv->sock < 0) {
898 wpa_printf(MSG_ERROR, "Failed to open Android control "
899 "socket '%s'", ctrl + 9);
902 wpa_printf(MSG_DEBUG, "Using Android control socket '%s'",
904 priv->android_control_socket = 1;
908 if (os_strncmp(ctrl, "@abstract:", 10) != 0) {
910 * Backwards compatibility - try to open an Android control
911 * socket and if that fails, assume this was a UNIX domain
914 priv->sock = android_get_control_socket(ctrl);
915 if (priv->sock >= 0) {
916 wpa_printf(MSG_DEBUG,
917 "Using Android control socket '%s'",
919 priv->android_control_socket = 1;
925 priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
926 if (priv->sock < 0) {
927 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
931 os_memset(&addr, 0, sizeof(addr));
932 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
933 addr.sun_len = sizeof(addr);
934 #endif /* __FreeBSD__ */
935 addr.sun_family = AF_UNIX;
937 if (os_strncmp(ctrl, "@abstract:", 10) == 0) {
938 addr.sun_path[0] = '\0';
939 os_strlcpy(addr.sun_path + 1, ctrl + 10,
940 sizeof(addr.sun_path) - 1);
941 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) <
943 wpa_printf(MSG_ERROR, "supp-global-ctrl-iface-init: "
944 "bind(PF_UNIX;%s) failed: %s",
945 ctrl, strerror(errno));
948 wpa_printf(MSG_DEBUG, "Using Abstract control socket '%s'",
953 os_strlcpy(addr.sun_path, ctrl, sizeof(addr.sun_path));
954 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
955 wpa_printf(MSG_INFO, "supp-global-ctrl-iface-init(%s) (will try fixup): bind(PF_UNIX): %s",
956 ctrl, strerror(errno));
957 if (connect(priv->sock, (struct sockaddr *) &addr,
959 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
960 " allow connections - assuming it was left"
961 "over from forced program termination");
962 if (unlink(ctrl) < 0) {
963 wpa_printf(MSG_ERROR,
964 "Could not unlink existing ctrl_iface socket '%s': %s",
965 ctrl, strerror(errno));
968 if (bind(priv->sock, (struct sockaddr *) &addr,
970 wpa_printf(MSG_ERROR, "supp-glb-iface-init: bind(PF_UNIX;%s): %s",
971 ctrl, strerror(errno));
974 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
975 "ctrl_iface socket '%s'",
978 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
979 "be in use - cannot override it");
980 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
987 wpa_printf(MSG_DEBUG, "Using UNIX control socket '%s'", ctrl);
989 if (global->params.ctrl_interface_group) {
990 char *gid_str = global->params.ctrl_interface_group;
995 grp = getgrnam(gid_str);
998 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d"
999 " (from group name '%s')",
1000 (int) gid, gid_str);
1002 /* Group name not found - try to parse this as gid */
1003 gid = strtol(gid_str, &endp, 10);
1004 if (*gid_str == '\0' || *endp != '\0') {
1005 wpa_printf(MSG_ERROR, "CTRL: Invalid group "
1009 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
1012 if (chown(ctrl, -1, gid) < 0) {
1013 wpa_printf(MSG_ERROR,
1014 "chown[global_ctrl_interface=%s,gid=%d]: %s",
1015 ctrl, (int) gid, strerror(errno));
1019 if (chmod(ctrl, S_IRWXU | S_IRWXG) < 0) {
1020 wpa_printf(MSG_ERROR,
1021 "chmod[global_ctrl_interface=%s]: %s",
1022 ctrl, strerror(errno));
1026 if (chmod(ctrl, S_IRWXU) < 0) {
1027 wpa_printf(MSG_DEBUG,
1028 "chmod[global_ctrl_interface=%s](S_IRWXU): %s",
1029 ctrl, strerror(errno));
1030 /* continue anyway since group change was not required
1038 * Make socket non-blocking so that we don't hang forever if
1039 * target dies unexpectedly.
1041 flags = fcntl(priv->sock, F_GETFL);
1043 flags |= O_NONBLOCK;
1044 if (fcntl(priv->sock, F_SETFL, flags) < 0) {
1045 wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s",
1047 /* Not fatal, continue on.*/
1051 eloop_register_read_sock(priv->sock,
1052 wpa_supplicant_global_ctrl_iface_receive,
1058 if (priv->sock >= 0) {
1066 struct ctrl_iface_global_priv *
1067 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
1069 struct ctrl_iface_global_priv *priv;
1071 priv = os_zalloc(sizeof(*priv));
1074 dl_list_init(&priv->ctrl_dst);
1075 priv->global = global;
1078 if (global->params.ctrl_interface == NULL)
1081 if (wpas_global_ctrl_iface_open_sock(global, priv) < 0) {
1086 wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
1092 static int wpas_ctrl_iface_global_reinit(struct wpa_global *global,
1093 struct ctrl_iface_global_priv *priv)
1097 if (priv->sock <= 0)
1101 * On Android, the control socket being used may be the socket
1102 * that is created when wpa_supplicant is started as a /init.*.rc
1103 * service. Such a socket is maintained as a key-value pair in
1104 * Android's environment. Closing this control socket would leave us
1105 * in a bad state with an invalid socket descriptor.
1107 if (priv->android_control_socket)
1110 eloop_unregister_read_sock(priv->sock);
1113 res = wpas_global_ctrl_iface_open_sock(global, priv);
1121 wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
1123 struct wpa_ctrl_dst *dst, *prev;
1125 if (priv->sock >= 0) {
1126 eloop_unregister_read_sock(priv->sock);
1129 if (priv->global->params.ctrl_interface)
1130 unlink(priv->global->params.ctrl_interface);
1131 dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst,