2 * hostapd / UNIX domain socket -based control interface
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
15 #include "utils/includes.h"
17 #ifndef CONFIG_NATIVE_WINDOWS
23 #include "utils/common.h"
24 #include "utils/eloop.h"
25 #include "common/ieee802_11_defs.h"
26 #include "drivers/driver.h"
27 #include "radius/radius_client.h"
28 #include "ap/hostapd.h"
29 #include "ap/ap_config.h"
30 #include "ap/ieee802_1x.h"
31 #include "ap/wpa_auth.h"
32 #include "ap/ieee802_11.h"
33 #include "ap/sta_info.h"
34 #include "ap/accounting.h"
35 #include "ap/wps_hostapd.h"
36 #include "ap/ctrl_iface_ap.h"
37 #include "ctrl_iface.h"
41 struct wpa_ctrl_dst *next;
42 struct sockaddr_un addr;
49 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
50 const char *buf, size_t len);
53 static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
54 struct sockaddr_un *from,
57 struct wpa_ctrl_dst *dst;
59 dst = os_zalloc(sizeof(*dst));
62 os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
63 dst->addrlen = fromlen;
64 dst->debug_level = MSG_INFO;
65 dst->next = hapd->ctrl_dst;
67 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
68 (u8 *) from->sun_path,
69 fromlen - offsetof(struct sockaddr_un, sun_path));
74 static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
75 struct sockaddr_un *from,
78 struct wpa_ctrl_dst *dst, *prev = NULL;
82 if (fromlen == dst->addrlen &&
83 os_memcmp(from->sun_path, dst->addr.sun_path,
84 fromlen - offsetof(struct sockaddr_un, sun_path))
87 hapd->ctrl_dst = dst->next;
89 prev->next = dst->next;
91 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
92 (u8 *) from->sun_path,
94 offsetof(struct sockaddr_un, sun_path));
104 static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
105 struct sockaddr_un *from,
109 struct wpa_ctrl_dst *dst;
111 wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
113 dst = hapd->ctrl_dst;
115 if (fromlen == dst->addrlen &&
116 os_memcmp(from->sun_path, dst->addr.sun_path,
117 fromlen - offsetof(struct sockaddr_un, sun_path))
119 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
120 "level", (u8 *) from->sun_path, fromlen -
121 offsetof(struct sockaddr_un, sun_path));
122 dst->debug_level = atoi(level);
132 static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
136 struct sta_info *sta;
138 wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
140 if (hwaddr_aton(txtaddr, addr))
143 sta = ap_get_sta(hapd, addr);
147 wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
148 "notification", MAC2STR(addr));
149 sta = ap_sta_add(hapd, addr);
153 hostapd_new_assoc_sta(hapd, sta, 0);
158 #ifdef CONFIG_IEEE80211W
160 static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
164 u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
166 wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
168 if (hwaddr_aton(txtaddr, addr))
171 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
172 ieee802_11_send_sa_query_req(hapd, addr, trans_id);
176 #endif /* NEED_AP_MLME */
177 #endif /* CONFIG_IEEE80211W */
181 static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
183 char *pin = os_strchr(txt, ' ');
191 timeout_txt = os_strchr(pin, ' ');
193 *timeout_txt++ = '\0';
194 timeout = atoi(timeout_txt);
198 return hostapd_wps_add_pin(hapd, txt, pin, timeout);
202 #ifdef CONFIG_WPS_OOB
203 static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
205 char *path, *method, *name;
207 path = os_strchr(txt, ' ');
212 method = os_strchr(path, ' ');
217 name = os_strchr(method, ' ');
221 return hostapd_wps_start_oob(hapd, txt, path, method, name);
223 #endif /* CONFIG_WPS_OOB */
224 #endif /* CONFIG_WPS */
227 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
230 struct hostapd_data *hapd = eloop_ctx;
233 struct sockaddr_un from;
234 socklen_t fromlen = sizeof(from);
236 const int reply_size = 4096;
239 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
240 (struct sockaddr *) &from, &fromlen);
242 perror("recvfrom(ctrl_iface)");
246 wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
248 reply = os_malloc(reply_size);
250 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
255 os_memcpy(reply, "OK\n", 3);
258 if (os_strcmp(buf, "PING") == 0) {
259 os_memcpy(reply, "PONG\n", 5);
261 } else if (os_strcmp(buf, "MIB") == 0) {
262 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
263 if (reply_len >= 0) {
264 res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
265 reply_size - reply_len);
271 if (reply_len >= 0) {
272 res = ieee802_1x_get_mib(hapd, reply + reply_len,
273 reply_size - reply_len);
279 #ifndef CONFIG_NO_RADIUS
280 if (reply_len >= 0) {
281 res = radius_client_get_mib(hapd->radius,
283 reply_size - reply_len);
289 #endif /* CONFIG_NO_RADIUS */
290 } else if (os_strcmp(buf, "STA-FIRST") == 0) {
291 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
293 } else if (os_strncmp(buf, "STA ", 4) == 0) {
294 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
296 } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
297 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
299 } else if (os_strcmp(buf, "ATTACH") == 0) {
300 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
302 } else if (os_strcmp(buf, "DETACH") == 0) {
303 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
305 } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
306 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
309 } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
310 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
312 #ifdef CONFIG_IEEE80211W
314 } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
315 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
317 #endif /* NEED_AP_MLME */
318 #endif /* CONFIG_IEEE80211W */
320 } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
321 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
323 } else if (os_strcmp(buf, "WPS_PBC") == 0) {
324 if (hostapd_wps_button_pushed(hapd))
326 #ifdef CONFIG_WPS_OOB
327 } else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
328 if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
330 #endif /* CONFIG_WPS_OOB */
331 #endif /* CONFIG_WPS */
333 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
338 os_memcpy(reply, "FAIL\n", 5);
341 sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
346 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
351 if (hapd->conf->ctrl_interface == NULL)
354 len = os_strlen(hapd->conf->ctrl_interface) +
355 os_strlen(hapd->conf->iface) + 2;
356 buf = os_malloc(len);
360 os_snprintf(buf, len, "%s/%s",
361 hapd->conf->ctrl_interface, hapd->conf->iface);
367 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
368 const char *txt, size_t len)
370 struct hostapd_data *hapd = ctx;
373 hostapd_ctrl_iface_send(hapd, level, txt, len);
377 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
379 struct sockaddr_un addr;
383 hapd->ctrl_sock = -1;
385 if (hapd->conf->ctrl_interface == NULL)
388 if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
389 if (errno == EEXIST) {
390 wpa_printf(MSG_DEBUG, "Using existing control "
391 "interface directory.");
393 perror("mkdir[ctrl_interface]");
398 if (hapd->conf->ctrl_interface_gid_set &&
399 chown(hapd->conf->ctrl_interface, 0,
400 hapd->conf->ctrl_interface_gid) < 0) {
401 perror("chown[ctrl_interface]");
405 if (os_strlen(hapd->conf->ctrl_interface) + 1 +
406 os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
409 s = socket(PF_UNIX, SOCK_DGRAM, 0);
411 perror("socket(PF_UNIX)");
415 os_memset(&addr, 0, sizeof(addr));
417 addr.sun_len = sizeof(addr);
418 #endif /* __FreeBSD__ */
419 addr.sun_family = AF_UNIX;
420 fname = hostapd_ctrl_iface_path(hapd);
423 os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
424 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
425 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
427 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
428 wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
429 " allow connections - assuming it was left"
430 "over from forced program termination");
431 if (unlink(fname) < 0) {
432 perror("unlink[ctrl_iface]");
433 wpa_printf(MSG_ERROR, "Could not unlink "
434 "existing ctrl_iface socket '%s'",
438 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
440 perror("bind(PF_UNIX)");
443 wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
444 "ctrl_iface socket '%s'", fname);
446 wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
447 "be in use - cannot override it");
448 wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
449 "not used anymore", fname);
456 if (hapd->conf->ctrl_interface_gid_set &&
457 chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
458 perror("chown[ctrl_interface/ifname]");
462 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
463 perror("chmod[ctrl_interface/ifname]");
469 eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
471 hapd->msg_ctx = hapd;
472 wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
487 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
489 struct wpa_ctrl_dst *dst, *prev;
491 if (hapd->ctrl_sock > -1) {
493 eloop_unregister_read_sock(hapd->ctrl_sock);
494 close(hapd->ctrl_sock);
495 hapd->ctrl_sock = -1;
496 fname = hostapd_ctrl_iface_path(hapd);
501 if (hapd->conf->ctrl_interface &&
502 rmdir(hapd->conf->ctrl_interface) < 0) {
503 if (errno == ENOTEMPTY) {
504 wpa_printf(MSG_DEBUG, "Control interface "
505 "directory not empty - leaving it "
508 perror("rmdir[ctrl_interface]");
513 dst = hapd->ctrl_dst;
522 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
523 const char *buf, size_t len)
525 struct wpa_ctrl_dst *dst, *next;
531 dst = hapd->ctrl_dst;
532 if (hapd->ctrl_sock < 0 || dst == NULL)
535 os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
536 io[0].iov_base = levelstr;
537 io[0].iov_len = os_strlen(levelstr);
538 io[1].iov_base = (char *) buf;
540 os_memset(&msg, 0, sizeof(msg));
547 if (level >= dst->debug_level) {
548 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
549 (u8 *) dst->addr.sun_path, dst->addrlen -
550 offsetof(struct sockaddr_un, sun_path));
551 msg.msg_name = &dst->addr;
552 msg.msg_namelen = dst->addrlen;
553 if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
555 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
557 idx, errno, strerror(errno));
559 if (dst->errors > 10 || _errno == ENOENT) {
560 hostapd_ctrl_iface_detach(
572 #endif /* CONFIG_NATIVE_WINDOWS */