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 if (!reply && reply_len == 1) {
205 } else if (!reply && reply_len == 2) {
211 if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
214 wpa_dbg(wpa_s, MSG_DEBUG,
215 "ctrl_iface sendto failed: %d - %s",
216 _errno, strerror(_errno));
217 if (_errno == ENOBUFS || _errno == EAGAIN) {
219 * The socket send buffer could be full. This
220 * may happen if client programs are not
221 * receiving their pending messages. Close and
222 * reopen the socket as a workaround to avoid
223 * getting stuck being unable to send any new
226 sock = wpas_ctrl_iface_reinit(wpa_s, priv);
228 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to reinitialize ctrl_iface socket");
232 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to send response to ATTACH - detaching");
234 wpa_supplicant_ctrl_iface_detach(
235 &priv->ctrl_dst, &from, fromlen);
242 eapol_sm_notify_ctrl_attached(wpa_s->eapol);
246 static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s)
250 char *pbuf, *dir = NULL;
253 if (wpa_s->conf->ctrl_interface == NULL)
256 pbuf = os_strdup(wpa_s->conf->ctrl_interface);
259 if (os_strncmp(pbuf, "DIR=", 4) == 0) {
262 gid_str = os_strstr(dir, " GROUP=");
268 len = os_strlen(dir) + os_strlen(wpa_s->ifname) + 2;
269 buf = os_malloc(len);
275 res = os_snprintf(buf, len, "%s/%s", dir, wpa_s->ifname);
276 if (os_snprintf_error(len, res)) {
283 /* Windows/WinPcap uses interface names that are not suitable
284 * as a file name - convert invalid chars to underscores */
292 #endif /* __CYGWIN__ */
298 static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level, int global,
299 const char *txt, size_t len)
301 struct wpa_supplicant *wpa_s = ctx;
306 if (global != 2 && wpa_s->global->ctrl_iface) {
307 struct ctrl_iface_global_priv *priv = wpa_s->global->ctrl_iface;
308 if (!dl_list_empty(&priv->ctrl_dst)) {
309 wpa_supplicant_ctrl_iface_send(wpa_s, global ? NULL :
313 level, txt, len, NULL,
318 if (wpa_s->ctrl_iface == NULL)
320 wpa_supplicant_ctrl_iface_send(wpa_s, NULL, wpa_s->ctrl_iface->sock,
321 &wpa_s->ctrl_iface->ctrl_dst,
322 level, txt, len, wpa_s->ctrl_iface,
327 static int wpas_ctrl_iface_open_sock(struct wpa_supplicant *wpa_s,
328 struct ctrl_iface_priv *priv)
330 struct sockaddr_un addr;
334 char *buf, *dir = NULL, *gid_str = NULL;
339 buf = os_strdup(wpa_s->conf->ctrl_interface);
343 os_snprintf(addr.sun_path, sizeof(addr.sun_path), "wpa_%s",
344 wpa_s->conf->ctrl_interface);
345 priv->sock = android_get_control_socket(addr.sun_path);
346 if (priv->sock >= 0) {
347 priv->android_control_socket = 1;
351 if (os_strncmp(buf, "DIR=", 4) == 0) {
353 gid_str = os_strstr(dir, " GROUP=");
360 gid_str = wpa_s->conf->ctrl_interface_group;
363 if (mkdir(dir, S_IRWXU | S_IRWXG) < 0) {
364 if (errno == EEXIST) {
365 wpa_printf(MSG_DEBUG, "Using existing control "
366 "interface directory.");
368 wpa_printf(MSG_ERROR, "mkdir[ctrl_interface=%s]: %s",
369 dir, strerror(errno));
376 * wpa_supplicant is started from /init.*.rc on Android and that seems
377 * to be using umask 0077 which would leave the control interface
378 * directory without group access. This breaks things since Wi-Fi
379 * framework assumes that this directory can be accessed by other
380 * applications in the wifi group. Fix this by adding group access even
381 * if umask value would prevent this.
383 if (chmod(dir, S_IRWXU | S_IRWXG) < 0) {
384 wpa_printf(MSG_ERROR, "CTRL: Could not chmod directory: %s",
386 /* Try to continue anyway */
391 grp = getgrnam(gid_str);
395 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d"
396 " (from group name '%s')",
399 /* Group name not found - try to parse this as gid */
400 gid = strtol(gid_str, &endp, 10);
401 if (*gid_str == '\0' || *endp != '\0') {
402 wpa_printf(MSG_ERROR, "CTRL: Invalid group "
407 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
412 if (gid_set && chown(dir, -1, gid) < 0) {
413 wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s",
414 dir, (int) gid, strerror(errno));
418 /* Make sure the group can enter and read the directory */
420 chmod(dir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP) < 0) {
421 wpa_printf(MSG_ERROR, "CTRL: chmod[ctrl_interface]: %s",
426 if (os_strlen(dir) + 1 + os_strlen(wpa_s->ifname) >=
427 sizeof(addr.sun_path)) {
428 wpa_printf(MSG_ERROR, "ctrl_iface path limit exceeded");
432 priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
433 if (priv->sock < 0) {
434 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
438 os_memset(&addr, 0, sizeof(addr));
439 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
440 addr.sun_len = sizeof(addr);
441 #endif /* __FreeBSD__ */
442 addr.sun_family = AF_UNIX;
443 fname = wpa_supplicant_ctrl_iface_path(wpa_s);
446 os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
447 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
448 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
450 if (connect(priv->sock, (struct sockaddr *) &addr,
452 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
453 " allow connections - assuming it was left"
454 "over from forced program termination");
455 if (unlink(fname) < 0) {
456 wpa_printf(MSG_ERROR,
457 "Could not unlink existing ctrl_iface socket '%s': %s",
458 fname, strerror(errno));
461 if (bind(priv->sock, (struct sockaddr *) &addr,
463 wpa_printf(MSG_ERROR, "supp-ctrl-iface-init: bind(PF_UNIX): %s",
467 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
468 "ctrl_iface socket '%s'", fname);
470 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
471 "be in use - cannot override it");
472 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
473 "not used anymore", fname);
480 if (gid_set && chown(fname, -1, gid) < 0) {
481 wpa_printf(MSG_ERROR, "chown[ctrl_interface=%s,gid=%d]: %s",
482 fname, (int) gid, strerror(errno));
486 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
487 wpa_printf(MSG_ERROR, "chmod[ctrl_interface=%s]: %s",
488 fname, strerror(errno));
498 * Make socket non-blocking so that we don't hang forever if
499 * target dies unexpectedly.
501 flags = fcntl(priv->sock, F_GETFL);
504 if (fcntl(priv->sock, F_SETFL, flags) < 0) {
505 wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s",
507 /* Not fatal, continue on.*/
511 eloop_register_read_sock(priv->sock, wpa_supplicant_ctrl_iface_receive,
513 wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
519 if (priv->sock >= 0) {
532 struct ctrl_iface_priv *
533 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
535 struct ctrl_iface_priv *priv;
537 priv = os_zalloc(sizeof(*priv));
540 dl_list_init(&priv->ctrl_dst);
544 if (wpa_s->conf->ctrl_interface == NULL)
547 if (wpas_ctrl_iface_open_sock(wpa_s, priv) < 0) {
556 static int wpas_ctrl_iface_reinit(struct wpa_supplicant *wpa_s,
557 struct ctrl_iface_priv *priv)
565 * On Android, the control socket being used may be the socket
566 * that is created when wpa_supplicant is started as a /init.*.rc
567 * service. Such a socket is maintained as a key-value pair in
568 * Android's environment. Closing this control socket would leave us
569 * in a bad state with an invalid socket descriptor.
571 if (priv->android_control_socket)
574 eloop_unregister_read_sock(priv->sock);
577 res = wpas_ctrl_iface_open_sock(wpa_s, priv);
584 void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
586 struct wpa_ctrl_dst *dst, *prev;
588 if (priv->sock > -1) {
590 char *buf, *dir = NULL;
591 eloop_unregister_read_sock(priv->sock);
592 if (!dl_list_empty(&priv->ctrl_dst)) {
594 * Wait before closing the control socket if
595 * there are any attached monitors in order to allow
596 * them to receive any pending messages.
598 wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached "
599 "monitors to receive messages");
604 fname = wpa_supplicant_ctrl_iface_path(priv->wpa_s);
610 if (priv->wpa_s->conf->ctrl_interface == NULL)
612 buf = os_strdup(priv->wpa_s->conf->ctrl_interface);
615 if (os_strncmp(buf, "DIR=", 4) == 0) {
618 gid_str = os_strstr(dir, " GROUP=");
624 if (rmdir(dir) < 0) {
625 if (errno == ENOTEMPTY) {
626 wpa_printf(MSG_DEBUG, "Control interface "
627 "directory not empty - leaving it "
630 wpa_printf(MSG_ERROR,
631 "rmdir[ctrl_interface=%s]: %s",
632 dir, strerror(errno));
639 dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst,
647 * wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors
648 * @ifname: Interface name for global control socket or %NULL
649 * @sock: Local socket fd
650 * @ctrl_dst: List of attached listeners
651 * @level: Priority level of the message
653 * @len: Message length
655 * Send a packet to all monitor programs attached to the control interface.
657 static void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s,
658 const char *ifname, int sock,
659 struct dl_list *ctrl_dst,
660 int level, const char *buf,
662 struct ctrl_iface_priv *priv,
663 struct ctrl_iface_global_priv *gp)
665 struct wpa_ctrl_dst *dst, *next;
671 if (sock < 0 || dl_list_empty(ctrl_dst))
674 res = os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
675 if (os_snprintf_error(sizeof(levelstr), res))
679 io[idx].iov_base = "IFNAME=";
682 io[idx].iov_base = (char *) ifname;
683 io[idx].iov_len = os_strlen(ifname);
685 io[idx].iov_base = " ";
689 io[idx].iov_base = levelstr;
690 io[idx].iov_len = os_strlen(levelstr);
692 io[idx].iov_base = (char *) buf;
693 io[idx].iov_len = len;
695 os_memset(&msg, 0, sizeof(msg));
697 msg.msg_iovlen = idx;
699 dl_list_for_each_safe(dst, next, ctrl_dst, struct wpa_ctrl_dst, list) {
703 if (level < dst->debug_level)
706 printf_encode(addr_txt, sizeof(addr_txt),
707 (u8 *) dst->addr.sun_path, dst->addrlen -
708 offsetof(struct sockaddr_un, sun_path));
709 msg.msg_name = (void *) &dst->addr;
710 msg.msg_namelen = dst->addrlen;
711 if (sendmsg(sock, &msg, MSG_DONTWAIT) >= 0) {
712 wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor sent successfully to %s",
719 wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor[%s]: %d - %s",
720 addr_txt, errno, strerror(errno));
723 if (dst->errors > 10 || _errno == ENOENT || _errno == EPERM) {
724 wpa_printf(MSG_INFO, "CTRL_IFACE: Detach monitor %s that cannot receive messages",
726 wpa_supplicant_ctrl_iface_detach(ctrl_dst, &dst->addr,
730 if (_errno == ENOBUFS || _errno == EAGAIN) {
732 * The socket send buffer could be full. This may happen
733 * if client programs are not receiving their pending
734 * messages. Close and reopen the socket as a workaround
735 * to avoid getting stuck being unable to send any new
739 sock = wpas_ctrl_iface_reinit(wpa_s, priv);
741 sock = wpas_ctrl_iface_global_reinit(
746 wpa_dbg(wpa_s, MSG_DEBUG,
747 "Failed to reinitialize ctrl_iface socket");
755 void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
759 struct sockaddr_un from;
760 socklen_t fromlen = sizeof(from);
763 wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor to "
764 "attach", priv->wpa_s->ifname);
765 eloop_wait_for_read_sock(priv->sock);
767 res = recvfrom(priv->sock, buf, sizeof(buf) - 1, 0,
768 (struct sockaddr *) &from, &fromlen);
770 wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
776 if (os_strcmp(buf, "ATTACH") == 0) {
777 /* handle ATTACH signal of first monitor interface */
778 if (!wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst,
781 if (sendto(priv->sock, "OK\n", 3, 0,
782 (struct sockaddr *) &from, fromlen) <
784 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
790 if (sendto(priv->sock, "FAIL\n", 5, 0,
791 (struct sockaddr *) &from, fromlen) <
793 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
798 /* return FAIL for all other signals */
799 if (sendto(priv->sock, "FAIL\n", 5, 0,
800 (struct sockaddr *) &from, fromlen) < 0) {
801 wpa_printf(MSG_DEBUG,
802 "ctrl_iface sendto failed: %s",
810 /* Global ctrl_iface */
812 static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
815 struct wpa_global *global = eloop_ctx;
816 struct ctrl_iface_global_priv *priv = sock_ctx;
819 struct sockaddr_un from;
820 socklen_t fromlen = sizeof(from);
821 char *reply = NULL, *reply_buf = NULL;
824 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
825 (struct sockaddr *) &from, &fromlen);
827 wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
833 if (os_strcmp(buf, "ATTACH") == 0) {
834 if (wpa_supplicant_ctrl_iface_attach(&priv->ctrl_dst, &from,
839 } else if (os_strcmp(buf, "DETACH") == 0) {
840 if (wpa_supplicant_ctrl_iface_detach(&priv->ctrl_dst, &from,
846 reply_buf = wpa_supplicant_global_ctrl_iface_process(
847 global, buf, &reply_len);
851 if (!reply && reply_len == 1) {
854 } else if (!reply && reply_len == 2) {
860 if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
862 wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
870 static int wpas_global_ctrl_iface_open_sock(struct wpa_global *global,
871 struct ctrl_iface_global_priv *priv)
873 struct sockaddr_un addr;
874 const char *ctrl = global->params.ctrl_interface;
877 wpa_printf(MSG_DEBUG, "Global control interface '%s'", ctrl);
880 if (os_strncmp(ctrl, "@android:", 9) == 0) {
881 priv->sock = android_get_control_socket(ctrl + 9);
882 if (priv->sock < 0) {
883 wpa_printf(MSG_ERROR, "Failed to open Android control "
884 "socket '%s'", ctrl + 9);
887 wpa_printf(MSG_DEBUG, "Using Android control socket '%s'",
889 priv->android_control_socket = 1;
893 if (os_strncmp(ctrl, "@abstract:", 10) != 0) {
895 * Backwards compatibility - try to open an Android control
896 * socket and if that fails, assume this was a UNIX domain
899 priv->sock = android_get_control_socket(ctrl);
900 if (priv->sock >= 0) {
901 wpa_printf(MSG_DEBUG,
902 "Using Android control socket '%s'",
904 priv->android_control_socket = 1;
910 priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
911 if (priv->sock < 0) {
912 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
916 os_memset(&addr, 0, sizeof(addr));
917 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
918 addr.sun_len = sizeof(addr);
919 #endif /* __FreeBSD__ */
920 addr.sun_family = AF_UNIX;
922 if (os_strncmp(ctrl, "@abstract:", 10) == 0) {
923 addr.sun_path[0] = '\0';
924 os_strlcpy(addr.sun_path + 1, ctrl + 10,
925 sizeof(addr.sun_path) - 1);
926 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) <
928 wpa_printf(MSG_ERROR, "supp-global-ctrl-iface-init: "
929 "bind(PF_UNIX;%s) failed: %s",
930 ctrl, strerror(errno));
933 wpa_printf(MSG_DEBUG, "Using Abstract control socket '%s'",
938 os_strlcpy(addr.sun_path, ctrl, sizeof(addr.sun_path));
939 if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
940 wpa_printf(MSG_INFO, "supp-global-ctrl-iface-init(%s) (will try fixup): bind(PF_UNIX): %s",
941 ctrl, strerror(errno));
942 if (connect(priv->sock, (struct sockaddr *) &addr,
944 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
945 " allow connections - assuming it was left"
946 "over from forced program termination");
947 if (unlink(ctrl) < 0) {
948 wpa_printf(MSG_ERROR,
949 "Could not unlink existing ctrl_iface socket '%s': %s",
950 ctrl, strerror(errno));
953 if (bind(priv->sock, (struct sockaddr *) &addr,
955 wpa_printf(MSG_ERROR, "supp-glb-iface-init: bind(PF_UNIX;%s): %s",
956 ctrl, strerror(errno));
959 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
960 "ctrl_iface socket '%s'",
963 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
964 "be in use - cannot override it");
965 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
972 wpa_printf(MSG_DEBUG, "Using UNIX control socket '%s'", ctrl);
974 if (global->params.ctrl_interface_group) {
975 char *gid_str = global->params.ctrl_interface_group;
980 grp = getgrnam(gid_str);
983 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d"
984 " (from group name '%s')",
987 /* Group name not found - try to parse this as gid */
988 gid = strtol(gid_str, &endp, 10);
989 if (*gid_str == '\0' || *endp != '\0') {
990 wpa_printf(MSG_ERROR, "CTRL: Invalid group "
994 wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
997 if (chown(ctrl, -1, gid) < 0) {
998 wpa_printf(MSG_ERROR,
999 "chown[global_ctrl_interface=%s,gid=%d]: %s",
1000 ctrl, (int) gid, strerror(errno));
1004 if (chmod(ctrl, S_IRWXU | S_IRWXG) < 0) {
1005 wpa_printf(MSG_ERROR,
1006 "chmod[global_ctrl_interface=%s]: %s",
1007 ctrl, strerror(errno));
1011 if (chmod(ctrl, S_IRWXU) < 0) {
1012 wpa_printf(MSG_DEBUG,
1013 "chmod[global_ctrl_interface=%s](S_IRWXU): %s",
1014 ctrl, strerror(errno));
1015 /* continue anyway since group change was not required
1023 * Make socket non-blocking so that we don't hang forever if
1024 * target dies unexpectedly.
1026 flags = fcntl(priv->sock, F_GETFL);
1028 flags |= O_NONBLOCK;
1029 if (fcntl(priv->sock, F_SETFL, flags) < 0) {
1030 wpa_printf(MSG_INFO, "fcntl(ctrl, O_NONBLOCK): %s",
1032 /* Not fatal, continue on.*/
1036 eloop_register_read_sock(priv->sock,
1037 wpa_supplicant_global_ctrl_iface_receive,
1043 if (priv->sock >= 0) {
1051 struct ctrl_iface_global_priv *
1052 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
1054 struct ctrl_iface_global_priv *priv;
1056 priv = os_zalloc(sizeof(*priv));
1059 dl_list_init(&priv->ctrl_dst);
1060 priv->global = global;
1063 if (global->params.ctrl_interface == NULL)
1066 if (wpas_global_ctrl_iface_open_sock(global, priv) < 0) {
1071 wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
1077 static int wpas_ctrl_iface_global_reinit(struct wpa_global *global,
1078 struct ctrl_iface_global_priv *priv)
1082 if (priv->sock <= 0)
1086 * On Android, the control socket being used may be the socket
1087 * that is created when wpa_supplicant is started as a /init.*.rc
1088 * service. Such a socket is maintained as a key-value pair in
1089 * Android's environment. Closing this control socket would leave us
1090 * in a bad state with an invalid socket descriptor.
1092 if (priv->android_control_socket)
1095 eloop_unregister_read_sock(priv->sock);
1098 res = wpas_global_ctrl_iface_open_sock(global, priv);
1106 wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
1108 struct wpa_ctrl_dst *dst, *prev;
1110 if (priv->sock >= 0) {
1111 eloop_unregister_read_sock(priv->sock);
1114 if (priv->global->params.ctrl_interface)
1115 unlink(priv->global->params.ctrl_interface);
1116 dl_list_for_each_safe(dst, prev, &priv->ctrl_dst, struct wpa_ctrl_dst,