2 * hostapd / UNIX domain socket -based control interface
3 * Copyright (c) 2004, 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.
17 #ifndef CONFIG_NATIVE_WINDOWS
26 #include "ieee802_1x.h"
28 #include "radius_client.h"
29 #include "ieee802_11.h"
30 #include "ctrl_iface.h"
32 #include "accounting.h"
36 struct wpa_ctrl_dst *next;
37 struct sockaddr_un addr;
44 static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
45 struct sockaddr_un *from,
48 struct wpa_ctrl_dst *dst;
50 dst = wpa_zalloc(sizeof(*dst));
53 memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
54 dst->addrlen = fromlen;
55 dst->debug_level = MSG_INFO;
56 dst->next = hapd->ctrl_dst;
58 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
59 (u8 *) from->sun_path, fromlen);
64 static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
65 struct sockaddr_un *from,
68 struct wpa_ctrl_dst *dst, *prev = NULL;
72 if (fromlen == dst->addrlen &&
73 memcmp(from->sun_path, dst->addr.sun_path, fromlen) == 0) {
75 hapd->ctrl_dst = dst->next;
77 prev->next = dst->next;
79 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
80 (u8 *) from->sun_path, fromlen);
90 static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
91 struct sockaddr_un *from,
95 struct wpa_ctrl_dst *dst;
97 wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
101 if (fromlen == dst->addrlen &&
102 memcmp(from->sun_path, dst->addr.sun_path, fromlen) == 0) {
103 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
104 "level", (u8 *) from->sun_path, fromlen);
105 dst->debug_level = atoi(level);
115 static int hostapd_ctrl_iface_sta_mib(struct hostapd_data *hapd,
116 struct sta_info *sta,
117 char *buf, size_t buflen)
122 ret = snprintf(buf, buflen, "FAIL\n");
123 if (ret < 0 || (size_t) ret >= buflen)
129 ret = snprintf(buf + len, buflen - len, MACSTR "\n",
131 if (ret < 0 || (size_t) ret >= buflen - len)
135 res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
138 res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
141 res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
149 static int hostapd_ctrl_iface_sta_first(struct hostapd_data *hapd,
150 char *buf, size_t buflen)
152 return hostapd_ctrl_iface_sta_mib(hapd, hapd->sta_list, buf, buflen);
156 static int hostapd_ctrl_iface_sta(struct hostapd_data *hapd,
158 char *buf, size_t buflen)
163 if (hwaddr_aton(txtaddr, addr)) {
164 ret = snprintf(buf, buflen, "FAIL\n");
165 if (ret < 0 || (size_t) ret >= buflen)
169 return hostapd_ctrl_iface_sta_mib(hapd, ap_get_sta(hapd, addr),
174 static int hostapd_ctrl_iface_sta_next(struct hostapd_data *hapd,
176 char *buf, size_t buflen)
179 struct sta_info *sta;
182 if (hwaddr_aton(txtaddr, addr) ||
183 (sta = ap_get_sta(hapd, addr)) == NULL) {
184 ret = snprintf(buf, buflen, "FAIL\n");
185 if (ret < 0 || (size_t) ret >= buflen)
189 return hostapd_ctrl_iface_sta_mib(hapd, sta->next, buf, buflen);
193 static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
197 struct sta_info *sta;
199 wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
201 if (hwaddr_aton(txtaddr, addr))
204 sta = ap_get_sta(hapd, addr);
208 wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
209 "notification", MAC2STR(addr));
210 sta = ap_sta_add(hapd, addr);
214 hostapd_new_assoc_sta(hapd, sta, 0);
215 accounting_sta_get_id(hapd, sta);
220 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
223 struct hostapd_data *hapd = eloop_ctx;
226 struct sockaddr_un from;
227 socklen_t fromlen = sizeof(from);
229 const int reply_size = 4096;
232 res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
233 (struct sockaddr *) &from, &fromlen);
235 perror("recvfrom(ctrl_iface)");
239 wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
241 reply = malloc(reply_size);
243 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
248 memcpy(reply, "OK\n", 3);
251 if (strcmp(buf, "PING") == 0) {
252 memcpy(reply, "PONG\n", 5);
254 } else if (strcmp(buf, "MIB") == 0) {
255 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
256 if (reply_len >= 0) {
257 res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
258 reply_size - reply_len);
264 if (reply_len >= 0) {
265 res = ieee802_1x_get_mib(hapd, reply + reply_len,
266 reply_size - reply_len);
272 if (reply_len >= 0) {
273 res = radius_client_get_mib(hapd->radius,
275 reply_size - reply_len);
281 } else if (strcmp(buf, "STA-FIRST") == 0) {
282 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
284 } else if (strncmp(buf, "STA ", 4) == 0) {
285 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
287 } else if (strncmp(buf, "STA-NEXT ", 9) == 0) {
288 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
290 } else if (strcmp(buf, "ATTACH") == 0) {
291 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
293 } else if (strcmp(buf, "DETACH") == 0) {
294 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
296 } else if (strncmp(buf, "LEVEL ", 6) == 0) {
297 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
300 } else if (strncmp(buf, "NEW_STA ", 8) == 0) {
301 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
304 memcpy(reply, "UNKNOWN COMMAND\n", 16);
309 memcpy(reply, "FAIL\n", 5);
312 sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
317 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
322 if (hapd->conf->ctrl_interface == NULL)
325 len = strlen(hapd->conf->ctrl_interface) + strlen(hapd->conf->iface) +
331 snprintf(buf, len, "%s/%s",
332 hapd->conf->ctrl_interface, hapd->conf->iface);
338 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
340 struct sockaddr_un addr;
344 hapd->ctrl_sock = -1;
346 if (hapd->conf->ctrl_interface == NULL)
349 if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
350 if (errno == EEXIST) {
351 wpa_printf(MSG_DEBUG, "Using existing control "
352 "interface directory.");
354 perror("mkdir[ctrl_interface]");
359 if (hapd->conf->ctrl_interface_gid_set &&
360 chown(hapd->conf->ctrl_interface, 0,
361 hapd->conf->ctrl_interface_gid) < 0) {
362 perror("chown[ctrl_interface]");
366 if (strlen(hapd->conf->ctrl_interface) + 1 + strlen(hapd->conf->iface)
367 >= sizeof(addr.sun_path))
370 s = socket(PF_UNIX, SOCK_DGRAM, 0);
372 perror("socket(PF_UNIX)");
376 memset(&addr, 0, sizeof(addr));
377 addr.sun_family = AF_UNIX;
378 fname = hostapd_ctrl_iface_path(hapd);
381 strncpy(addr.sun_path, fname, sizeof(addr.sun_path));
382 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
383 perror("bind(PF_UNIX)");
387 if (hapd->conf->ctrl_interface_gid_set &&
388 chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
389 perror("chown[ctrl_interface/ifname]");
393 if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
394 perror("chmod[ctrl_interface/ifname]");
400 eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
416 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
418 struct wpa_ctrl_dst *dst, *prev;
420 if (hapd->ctrl_sock > -1) {
422 eloop_unregister_read_sock(hapd->ctrl_sock);
423 close(hapd->ctrl_sock);
424 hapd->ctrl_sock = -1;
425 fname = hostapd_ctrl_iface_path(hapd);
430 if (hapd->conf->ctrl_interface &&
431 rmdir(hapd->conf->ctrl_interface) < 0) {
432 if (errno == ENOTEMPTY) {
433 wpa_printf(MSG_DEBUG, "Control interface "
434 "directory not empty - leaving it "
437 perror("rmdir[ctrl_interface]");
442 dst = hapd->ctrl_dst;
451 void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
452 char *buf, size_t len)
454 struct wpa_ctrl_dst *dst, *next;
460 dst = hapd->ctrl_dst;
461 if (hapd->ctrl_sock < 0 || dst == NULL)
464 snprintf(levelstr, sizeof(levelstr), "<%d>", level);
465 io[0].iov_base = levelstr;
466 io[0].iov_len = strlen(levelstr);
467 io[1].iov_base = buf;
469 memset(&msg, 0, sizeof(msg));
476 if (level >= dst->debug_level) {
477 wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
478 (u8 *) dst->addr.sun_path, dst->addrlen);
479 msg.msg_name = &dst->addr;
480 msg.msg_namelen = dst->addrlen;
481 if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
482 fprintf(stderr, "CTRL_IFACE monitor[%d]: ",
486 if (dst->errors > 10) {
487 hostapd_ctrl_iface_detach(
499 #endif /* CONFIG_NATIVE_WINDOWS */