[thirdparty/hostap.git] / hostapd / ctrl_iface.c

/*
 * hostapd / UNIX domain socket -based control interface
 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "utils/includes.h"

#ifndef CONFIG_NATIVE_WINDOWS

#include <sys/un.h>
#include <sys/stat.h>
#include <stddef.h>

#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "drivers/driver.h"
#include "radius/radius_client.h"
#include "ap/hostapd.h"
#include "ap/ap_config.h"
#include "ap/ieee802_1x.h"
#include "ap/wpa_auth.h"
#include "ap/ieee802_11.h"
#include "ap/sta_info.h"
#include "ap/accounting.h"
#include "ap/wps_hostapd.h"
#include "ap/ctrl_iface_ap.h"
#include "ctrl_iface.h"


struct wpa_ctrl_dst {
	struct wpa_ctrl_dst *next;
	struct sockaddr_un addr;
	socklen_t addrlen;
	int debug_level;
	int errors;
};


static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
				    const char *buf, size_t len);


static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
				     struct sockaddr_un *from,
				     socklen_t fromlen)
{
	struct wpa_ctrl_dst *dst;

	dst = os_zalloc(sizeof(*dst));
	if (dst == NULL)
		return -1;
	os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
	dst->addrlen = fromlen;
	dst->debug_level = MSG_INFO;
	dst->next = hapd->ctrl_dst;
	hapd->ctrl_dst = dst;
	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
		    (u8 *) from->sun_path,
		    fromlen - offsetof(struct sockaddr_un, sun_path));
	return 0;
}


static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
				     struct sockaddr_un *from,
				     socklen_t fromlen)
{
	struct wpa_ctrl_dst *dst, *prev = NULL;

	dst = hapd->ctrl_dst;
	while (dst) {
		if (fromlen == dst->addrlen &&
		    os_memcmp(from->sun_path, dst->addr.sun_path,
			      fromlen - offsetof(struct sockaddr_un, sun_path))
		    == 0) {
			if (prev == NULL)
				hapd->ctrl_dst = dst->next;
			else
				prev->next = dst->next;
			os_free(dst);
			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
				    (u8 *) from->sun_path,
				    fromlen -
				    offsetof(struct sockaddr_un, sun_path));
			return 0;
		}
		prev = dst;
		dst = dst->next;
	}
	return -1;
}


static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
				    struct sockaddr_un *from,
				    socklen_t fromlen,
				    char *level)
{
	struct wpa_ctrl_dst *dst;

	wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);

	dst = hapd->ctrl_dst;
	while (dst) {
		if (fromlen == dst->addrlen &&
		    os_memcmp(from->sun_path, dst->addr.sun_path,
			      fromlen - offsetof(struct sockaddr_un, sun_path))
		    == 0) {
			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
				    "level", (u8 *) from->sun_path, fromlen -
				    offsetof(struct sockaddr_un, sun_path));
			dst->debug_level = atoi(level);
			return 0;
		}
		dst = dst->next;
	}

	return -1;
}


static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
				      const char *txtaddr)
{
	u8 addr[ETH_ALEN];
	struct sta_info *sta;

	wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);

	if (hwaddr_aton(txtaddr, addr))
		return -1;

	sta = ap_get_sta(hapd, addr);
	if (sta)
		return 0;

	wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
		   "notification", MAC2STR(addr));
	sta = ap_sta_add(hapd, addr);
	if (sta == NULL)
		return -1;

	hostapd_new_assoc_sta(hapd, sta, 0);
	return 0;
}


#ifdef CONFIG_IEEE80211W
#ifdef NEED_AP_MLME
static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
				       const char *txtaddr)
{
	u8 addr[ETH_ALEN];
	u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];

	wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);

	if (hwaddr_aton(txtaddr, addr) ||
	    os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0)
		return -1;

	ieee802_11_send_sa_query_req(hapd, addr, trans_id);

	return 0;
}
#endif /* NEED_AP_MLME */
#endif /* CONFIG_IEEE80211W */


#ifdef CONFIG_WPS
static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
{
	char *pin = os_strchr(txt, ' ');
	char *timeout_txt;
	int timeout;

	if (pin == NULL)
		return -1;
	*pin++ = '\0';

	timeout_txt = os_strchr(pin, ' ');
	if (timeout_txt) {
		*timeout_txt++ = '\0';
		timeout = atoi(timeout_txt);
	} else
		timeout = 0;

	return hostapd_wps_add_pin(hapd, txt, pin, timeout);
}


#ifdef CONFIG_WPS_OOB
static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
{
	char *path, *method, *name;

	path = os_strchr(txt, ' ');
	if (path == NULL)
		return -1;
	*path++ = '\0';

	method = os_strchr(path, ' ');
	if (method == NULL)
		return -1;
	*method++ = '\0';

	name = os_strchr(method, ' ');
	if (name != NULL)
		*name++ = '\0';

	return hostapd_wps_start_oob(hapd, txt, path, method, name);
}
#endif /* CONFIG_WPS_OOB */
#endif /* CONFIG_WPS */


static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
				       void *sock_ctx)
{
	struct hostapd_data *hapd = eloop_ctx;
	char buf[256];
	int res;
	struct sockaddr_un from;
	socklen_t fromlen = sizeof(from);
	char *reply;
	const int reply_size = 4096;
	int reply_len;

	res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
		       (struct sockaddr *) &from, &fromlen);
	if (res < 0) {
		perror("recvfrom(ctrl_iface)");
		return;
	}
	buf[res] = '\0';
	wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);

	reply = os_malloc(reply_size);
	if (reply == NULL) {
		sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
		       fromlen);
		return;
	}

	os_memcpy(reply, "OK\n", 3);
	reply_len = 3;

	if (os_strcmp(buf, "PING") == 0) {
		os_memcpy(reply, "PONG\n", 5);
		reply_len = 5;
	} else if (os_strcmp(buf, "MIB") == 0) {
		reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
		if (reply_len >= 0) {
			res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
					  reply_size - reply_len);
			if (res < 0)
				reply_len = -1;
			else
				reply_len += res;
		}
		if (reply_len >= 0) {
			res = ieee802_1x_get_mib(hapd, reply + reply_len,
						 reply_size - reply_len);
			if (res < 0)
				reply_len = -1;
			else
				reply_len += res;
		}
#ifndef CONFIG_NO_RADIUS
		if (reply_len >= 0) {
			res = radius_client_get_mib(hapd->radius,
						    reply + reply_len,
						    reply_size - reply_len);
			if (res < 0)
				reply_len = -1;
			else
				reply_len += res;
		}
#endif /* CONFIG_NO_RADIUS */
	} else if (os_strcmp(buf, "STA-FIRST") == 0) {
		reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
							 reply_size);
	} else if (os_strncmp(buf, "STA ", 4) == 0) {
		reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
						   reply_size);
	} else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
		reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
							reply_size);
	} else if (os_strcmp(buf, "ATTACH") == 0) {
		if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
			reply_len = -1;
	} else if (os_strcmp(buf, "DETACH") == 0) {
		if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
			reply_len = -1;
	} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
		if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
						    buf + 6))
			reply_len = -1;
	} else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
		if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
			reply_len = -1;
#ifdef CONFIG_IEEE80211W
#ifdef NEED_AP_MLME
	} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
		if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
			reply_len = -1;
#endif /* NEED_AP_MLME */
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_WPS
	} else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
		if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
			reply_len = -1;
	} else if (os_strcmp(buf, "WPS_PBC") == 0) {
		if (hostapd_wps_button_pushed(hapd))
			reply_len = -1;
#ifdef CONFIG_WPS_OOB
	} else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
		if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
			reply_len = -1;
#endif /* CONFIG_WPS_OOB */
#endif /* CONFIG_WPS */
	} else {
		os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
		reply_len = 16;
	}

	if (reply_len < 0) {
		os_memcpy(reply, "FAIL\n", 5);
		reply_len = 5;
	}
	sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
	os_free(reply);
}


static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
{
	char *buf;
	size_t len;

	if (hapd->conf->ctrl_interface == NULL)
		return NULL;

	len = os_strlen(hapd->conf->ctrl_interface) +
		os_strlen(hapd->conf->iface) + 2;
	buf = os_malloc(len);
	if (buf == NULL)
		return NULL;

	os_snprintf(buf, len, "%s/%s",
		    hapd->conf->ctrl_interface, hapd->conf->iface);
	buf[len - 1] = '\0';
	return buf;
}


static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
				      const char *txt, size_t len)
{
	struct hostapd_data *hapd = ctx;
	if (hapd == NULL)
		return;
	hostapd_ctrl_iface_send(hapd, level, txt, len);
}


int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
{
	struct sockaddr_un addr;
	int s = -1;
	char *fname = NULL;

	hapd->ctrl_sock = -1;

	if (hapd->conf->ctrl_interface == NULL)
		return 0;

	if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
		if (errno == EEXIST) {
			wpa_printf(MSG_DEBUG, "Using existing control "
				   "interface directory.");
		} else {
			perror("mkdir[ctrl_interface]");
			goto fail;
		}
	}

	if (hapd->conf->ctrl_interface_gid_set &&
	    chown(hapd->conf->ctrl_interface, 0,
		  hapd->conf->ctrl_interface_gid) < 0) {
		perror("chown[ctrl_interface]");
		return -1;
	}

	if (os_strlen(hapd->conf->ctrl_interface) + 1 +
	    os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
		goto fail;

	s = socket(PF_UNIX, SOCK_DGRAM, 0);
	if (s < 0) {
		perror("socket(PF_UNIX)");
		goto fail;
	}

	os_memset(&addr, 0, sizeof(addr));
#ifdef __FreeBSD__
	addr.sun_len = sizeof(addr);
#endif /* __FreeBSD__ */
	addr.sun_family = AF_UNIX;
	fname = hostapd_ctrl_iface_path(hapd);
	if (fname == NULL)
		goto fail;
	os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
			   strerror(errno));
		if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
			wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
				   " allow connections - assuming it was left"
				   "over from forced program termination");
			if (unlink(fname) < 0) {
				perror("unlink[ctrl_iface]");
				wpa_printf(MSG_ERROR, "Could not unlink "
					   "existing ctrl_iface socket '%s'",
					   fname);
				goto fail;
			}
			if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
			    0) {
				perror("bind(PF_UNIX)");
				goto fail;
			}
			wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
				   "ctrl_iface socket '%s'", fname);
		} else {
			wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
				   "be in use - cannot override it");
			wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
				   "not used anymore", fname);
			os_free(fname);
			fname = NULL;
			goto fail;
		}
	}

	if (hapd->conf->ctrl_interface_gid_set &&
	    chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
		perror("chown[ctrl_interface/ifname]");
		goto fail;
	}

	if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
		perror("chmod[ctrl_interface/ifname]");
		goto fail;
	}
	os_free(fname);

	hapd->ctrl_sock = s;
	eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
				 NULL);
	hapd->msg_ctx = hapd;
	wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);

	return 0;

fail:
	if (s >= 0)
		close(s);
	if (fname) {
		unlink(fname);
		os_free(fname);
	}
	return -1;
}


void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
{
	struct wpa_ctrl_dst *dst, *prev;

	if (hapd->ctrl_sock > -1) {
		char *fname;
		eloop_unregister_read_sock(hapd->ctrl_sock);
		close(hapd->ctrl_sock);
		hapd->ctrl_sock = -1;
		fname = hostapd_ctrl_iface_path(hapd);
		if (fname)
			unlink(fname);
		os_free(fname);

		if (hapd->conf->ctrl_interface &&
		    rmdir(hapd->conf->ctrl_interface) < 0) {
			if (errno == ENOTEMPTY) {
				wpa_printf(MSG_DEBUG, "Control interface "
					   "directory not empty - leaving it "
					   "behind");
			} else {
				perror("rmdir[ctrl_interface]");
			}
		}
	}

	dst = hapd->ctrl_dst;
	while (dst) {
		prev = dst;
		dst = dst->next;
		os_free(prev);
	}
}


static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
				    const char *buf, size_t len)
{
	struct wpa_ctrl_dst *dst, *next;
	struct msghdr msg;
	int idx;
	struct iovec io[2];
	char levelstr[10];

	dst = hapd->ctrl_dst;
	if (hapd->ctrl_sock < 0 || dst == NULL)
		return;

	os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
	io[0].iov_base = levelstr;
	io[0].iov_len = os_strlen(levelstr);
	io[1].iov_base = (char *) buf;
	io[1].iov_len = len;
	os_memset(&msg, 0, sizeof(msg));
	msg.msg_iov = io;
	msg.msg_iovlen = 2;

	idx = 0;
	while (dst) {
		next = dst->next;
		if (level >= dst->debug_level) {
			wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
				    (u8 *) dst->addr.sun_path, dst->addrlen -
				    offsetof(struct sockaddr_un, sun_path));
			msg.msg_name = &dst->addr;
			msg.msg_namelen = dst->addrlen;
			if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
				int _errno = errno;
				wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
					   "%d - %s",
					   idx, errno, strerror(errno));
				dst->errors++;
				if (dst->errors > 10 || _errno == ENOENT) {
					hostapd_ctrl_iface_detach(
						hapd, &dst->addr,
						dst->addrlen);
				}
			} else
				dst->errors = 0;
		}
		idx++;
		dst = next;
	}
}

#endif /* CONFIG_NATIVE_WINDOWS */
Commit	Line	Data
6fc6879b JM	1	/*
6fc6879b JM	2	* hostapd / UNIX domain socket -based control interface
6226e38d	3	* Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
6fc6879b JM	4	*
	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.
	8	*
	9	* Alternatively, this software may be distributed under the terms of BSD
	10	* license.
	11	*
	12	* See README and COPYING for more details.
	13	*/
	14
6226e38d	15	#include "utils/includes.h"
6fc6879b JM	16
	17	#ifndef CONFIG_NATIVE_WINDOWS
	18
	19	#include <sys/un.h>
	20	#include <sys/stat.h>
75864b7f	21	#include <stddef.h>
6fc6879b	22
6226e38d JM	23	#include "utils/common.h"
6226e38d JM	24	#include "utils/eloop.h"
81f4f619	25	#include "common/ieee802_11_defs.h"
1057d78e	26	#include "drivers/driver.h"
6fc6879b	27	#include "radius/radius_client.h"
1057d78e	28	#include "ap/hostapd.h"
6226e38d	29	#include "ap/ap_config.h"
1057d78e	30	#include "ap/ieee802_1x.h"
6226e38d	31	#include "ap/wpa_auth.h"
1057d78e JM	32	#include "ap/ieee802_11.h"
	33	#include "ap/sta_info.h"
	34	#include "ap/accounting.h"
32da61d9	35	#include "ap/wps_hostapd.h"
0e2d35c6	36	#include "ap/ctrl_iface_ap.h"
6fc6879b	37	#include "ctrl_iface.h"
6fc6879b JM	38
	39
	40	struct wpa_ctrl_dst {
	41	struct wpa_ctrl_dst *next;
	42	struct sockaddr_un addr;
	43	socklen_t addrlen;
	44	int debug_level;
	45	int errors;
	46	};
	47
	48
42d16805 JM	49	static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
	50	const char *buf, size_t len);
	51
	52
6fc6879b JM	53	static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
	54	struct sockaddr_un *from,
	55	socklen_t fromlen)
	56	{
	57	struct wpa_ctrl_dst *dst;
	58
	59	dst = os_zalloc(sizeof(*dst));
	60	if (dst == NULL)
	61	return -1;
	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;
	66	hapd->ctrl_dst = dst;
	67	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
75864b7f JM	68	(u8 *) from->sun_path,
75864b7f JM	69	fromlen - offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	70	return 0;
	71	}
	72
	73
	74	static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
	75	struct sockaddr_un *from,
	76	socklen_t fromlen)
	77	{
	78	struct wpa_ctrl_dst dst, prev = NULL;
	79
	80	dst = hapd->ctrl_dst;
	81	while (dst) {
	82	if (fromlen == dst->addrlen &&
75864b7f JM	83	os_memcmp(from->sun_path, dst->addr.sun_path,
	84	fromlen - offsetof(struct sockaddr_un, sun_path))
	85	== 0) {
6fc6879b JM	86	if (prev == NULL)
	87	hapd->ctrl_dst = dst->next;
	88	else
	89	prev->next = dst->next;
	90	os_free(dst);
	91	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
75864b7f JM	92	(u8 *) from->sun_path,
	93	fromlen -
	94	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	95	return 0;
	96	}
	97	prev = dst;
	98	dst = dst->next;
	99	}
	100	return -1;
	101	}
	102
	103
	104	static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
	105	struct sockaddr_un *from,
	106	socklen_t fromlen,
	107	char *level)
	108	{
	109	struct wpa_ctrl_dst *dst;
	110
	111	wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
	112
	113	dst = hapd->ctrl_dst;
	114	while (dst) {
	115	if (fromlen == dst->addrlen &&
75864b7f JM	116	os_memcmp(from->sun_path, dst->addr.sun_path,
	117	fromlen - offsetof(struct sockaddr_un, sun_path))
	118	== 0) {
6fc6879b	119	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
75864b7f JM	120	"level", (u8 *) from->sun_path, fromlen -
75864b7f JM	121	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	122	dst->debug_level = atoi(level);
	123	return 0;
	124	}
	125	dst = dst->next;
	126	}
	127
	128	return -1;
	129	}
	130
	131
6fc6879b JM	132	static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
	133	const char *txtaddr)
	134	{
	135	u8 addr[ETH_ALEN];
	136	struct sta_info *sta;
	137
	138	wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
	139
	140	if (hwaddr_aton(txtaddr, addr))
	141	return -1;
	142
	143	sta = ap_get_sta(hapd, addr);
	144	if (sta)
	145	return 0;
	146
	147	wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
	148	"notification", MAC2STR(addr));
	149	sta = ap_sta_add(hapd, addr);
	150	if (sta == NULL)
	151	return -1;
	152
	153	hostapd_new_assoc_sta(hapd, sta, 0);
6fc6879b JM	154	return 0;
	155	}
	156
	157
88b4b424	158	#ifdef CONFIG_IEEE80211W
fe6bdb77	159	#ifdef NEED_AP_MLME
88b4b424 JM	160	static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
	161	const char *txtaddr)
	162	{
	163	u8 addr[ETH_ALEN];
	164	u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
	165
	166	wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
	167
f5455a2d JM	168	if (hwaddr_aton(txtaddr, addr) \|\|
f5455a2d JM	169	os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0)
88b4b424 JM	170	return -1;
88b4b424 JM	171
88b4b424 JM	172	ieee802_11_send_sa_query_req(hapd, addr, trans_id);
	173
	174	return 0;
	175	}
fe6bdb77	176	#endif /* NEED_AP_MLME */
88b4b424 JM	177	#endif /* CONFIG_IEEE80211W */
	178
	179
ad08c363 JM	180	#ifdef CONFIG_WPS
	181	static int hostapd_ctrl_iface_wps_pin(struct hostapd_data hapd, char txt)
	182	{
	183	char *pin = os_strchr(txt, ' ');
077a781f JM	184	char *timeout_txt;
	185	int timeout;
	186
ad08c363 JM	187	if (pin == NULL)
	188	return -1;
	189	*pin++ = '\0';
077a781f JM	190
	191	timeout_txt = os_strchr(pin, ' ');
	192	if (timeout_txt) {
	193	*timeout_txt++ = '\0';
	194	timeout = atoi(timeout_txt);
	195	} else
	196	timeout = 0;
	197
	198	return hostapd_wps_add_pin(hapd, txt, pin, timeout);
ad08c363	199	}
46bdb83a MH	200
46bdb83a MH	201
116f7bb0	202	#ifdef CONFIG_WPS_OOB
46bdb83a MH	203	static int hostapd_ctrl_iface_wps_oob(struct hostapd_data hapd, char txt)
46bdb83a MH	204	{
e1ee6b60	205	char path, method, *name;
46bdb83a MH	206
	207	path = os_strchr(txt, ' ');
	208	if (path == NULL)
	209	return -1;
	210	*path++ = '\0';
	211
	212	method = os_strchr(path, ' ');
	213	if (method == NULL)
	214	return -1;
	215	*method++ = '\0';
	216
e1ee6b60 MH	217	name = os_strchr(method, ' ');
	218	if (name != NULL)
	219	*name++ = '\0';
	220
	221	return hostapd_wps_start_oob(hapd, txt, path, method, name);
46bdb83a	222	}
116f7bb0	223	#endif /* CONFIG_WPS_OOB */
ad08c363 JM	224	#endif /* CONFIG_WPS */
	225
	226
6fc6879b JM	227	static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
	228	void *sock_ctx)
	229	{
	230	struct hostapd_data *hapd = eloop_ctx;
	231	char buf[256];
	232	int res;
	233	struct sockaddr_un from;
	234	socklen_t fromlen = sizeof(from);
	235	char *reply;
	236	const int reply_size = 4096;
	237	int reply_len;
	238
	239	res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
	240	(struct sockaddr *) &from, &fromlen);
	241	if (res < 0) {
	242	perror("recvfrom(ctrl_iface)");
	243	return;
	244	}
	245	buf[res] = '\0';
	246	wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
	247
	248	reply = os_malloc(reply_size);
	249	if (reply == NULL) {
	250	sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
	251	fromlen);
	252	return;
	253	}
	254
	255	os_memcpy(reply, "OK\n", 3);
	256	reply_len = 3;
	257
	258	if (os_strcmp(buf, "PING") == 0) {
	259	os_memcpy(reply, "PONG\n", 5);
	260	reply_len = 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);
	266	if (res < 0)
	267	reply_len = -1;
	268	else
	269	reply_len += res;
	270	}
	271	if (reply_len >= 0) {
	272	res = ieee802_1x_get_mib(hapd, reply + reply_len,
	273	reply_size - reply_len);
	274	if (res < 0)
	275	reply_len = -1;
	276	else
	277	reply_len += res;
	278	}
74784010	279	#ifndef CONFIG_NO_RADIUS
6fc6879b JM	280	if (reply_len >= 0) {
	281	res = radius_client_get_mib(hapd->radius,
	282	reply + reply_len,
	283	reply_size - reply_len);
	284	if (res < 0)
	285	reply_len = -1;
	286	else
	287	reply_len += res;
	288	}
74784010	289	#endif /* CONFIG_NO_RADIUS */
6fc6879b JM	290	} else if (os_strcmp(buf, "STA-FIRST") == 0) {
	291	reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
	292	reply_size);
	293	} else if (os_strncmp(buf, "STA ", 4) == 0) {
	294	reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
	295	reply_size);
	296	} else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
	297	reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
	298	reply_size);
	299	} else if (os_strcmp(buf, "ATTACH") == 0) {
	300	if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
	301	reply_len = -1;
	302	} else if (os_strcmp(buf, "DETACH") == 0) {
	303	if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
	304	reply_len = -1;
	305	} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
	306	if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
	307	buf + 6))
	308	reply_len = -1;
	309	} else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
	310	if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
	311	reply_len = -1;
88b4b424	312	#ifdef CONFIG_IEEE80211W
fe6bdb77	313	#ifdef NEED_AP_MLME
88b4b424 JM	314	} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
	315	if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
	316	reply_len = -1;
fe6bdb77	317	#endif /* NEED_AP_MLME */
88b4b424	318	#endif /* CONFIG_IEEE80211W */
ad08c363 JM	319	#ifdef CONFIG_WPS
	320	} else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
	321	if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
	322	reply_len = -1;
	323	} else if (os_strcmp(buf, "WPS_PBC") == 0) {
	324	if (hostapd_wps_button_pushed(hapd))
	325	reply_len = -1;
116f7bb0	326	#ifdef CONFIG_WPS_OOB
46bdb83a MH	327	} else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
	328	if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
	329	reply_len = -1;
116f7bb0	330	#endif /* CONFIG_WPS_OOB */
ad08c363	331	#endif /* CONFIG_WPS */
6fc6879b JM	332	} else {
	333	os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
	334	reply_len = 16;
	335	}
	336
	337	if (reply_len < 0) {
	338	os_memcpy(reply, "FAIL\n", 5);
	339	reply_len = 5;
	340	}
	341	sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
	342	os_free(reply);
	343	}
	344
	345
	346	static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
	347	{
	348	char *buf;
	349	size_t len;
	350
	351	if (hapd->conf->ctrl_interface == NULL)
	352	return NULL;
	353
	354	len = os_strlen(hapd->conf->ctrl_interface) +
	355	os_strlen(hapd->conf->iface) + 2;
	356	buf = os_malloc(len);
	357	if (buf == NULL)
	358	return NULL;
	359
	360	os_snprintf(buf, len, "%s/%s",
	361	hapd->conf->ctrl_interface, hapd->conf->iface);
	362	buf[len - 1] = '\0';
	363	return buf;
	364	}
	365
	366
42d16805 JM	367	static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
	368	const char *txt, size_t len)
	369	{
	370	struct hostapd_data *hapd = ctx;
	371	if (hapd == NULL)
	372	return;
	373	hostapd_ctrl_iface_send(hapd, level, txt, len);
	374	}
	375
	376
6fc6879b JM	377	int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
	378	{
	379	struct sockaddr_un addr;
	380	int s = -1;
	381	char *fname = NULL;
	382
	383	hapd->ctrl_sock = -1;
	384
	385	if (hapd->conf->ctrl_interface == NULL)
	386	return 0;
	387
	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.");
	392	} else {
	393	perror("mkdir[ctrl_interface]");
	394	goto fail;
	395	}
	396	}
	397
	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]");
	402	return -1;
	403	}
	404
	405	if (os_strlen(hapd->conf->ctrl_interface) + 1 +
	406	os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
	407	goto fail;
	408
	409	s = socket(PF_UNIX, SOCK_DGRAM, 0);
	410	if (s < 0) {
	411	perror("socket(PF_UNIX)");
	412	goto fail;
	413	}
	414
	415	os_memset(&addr, 0, sizeof(addr));
75864b7f JM	416	#ifdef __FreeBSD__
	417	addr.sun_len = sizeof(addr);
	418	#endif /* __FreeBSD__ */
6fc6879b JM	419	addr.sun_family = AF_UNIX;
	420	fname = hostapd_ctrl_iface_path(hapd);
	421	if (fname == NULL)
	422	goto fail;
	423	os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
	424	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
617d1555 JM	425	wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
	426	strerror(errno));
	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'",
	435	fname);
	436	goto fail;
	437	}
	438	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
	439	0) {
	440	perror("bind(PF_UNIX)");
	441	goto fail;
	442	}
	443	wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
	444	"ctrl_iface socket '%s'", fname);
	445	} else {
	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);
	450	os_free(fname);
	451	fname = NULL;
	452	goto fail;
	453	}
6fc6879b JM	454	}
	455
	456	if (hapd->conf->ctrl_interface_gid_set &&
	457	chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
	458	perror("chown[ctrl_interface/ifname]");
	459	goto fail;
	460	}
	461
	462	if (chmod(fname, S_IRWXU \| S_IRWXG) < 0) {
	463	perror("chmod[ctrl_interface/ifname]");
	464	goto fail;
	465	}
	466	os_free(fname);
	467
	468	hapd->ctrl_sock = s;
	469	eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
	470	NULL);
4f760fcc	471	hapd->msg_ctx = hapd;
42d16805	472	wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
6fc6879b JM	473
	474	return 0;
	475
	476	fail:
	477	if (s >= 0)
	478	close(s);
	479	if (fname) {
	480	unlink(fname);
	481	os_free(fname);
	482	}
	483	return -1;
	484	}
	485
	486
	487	void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
	488	{
	489	struct wpa_ctrl_dst dst, prev;
	490
	491	if (hapd->ctrl_sock > -1) {
	492	char *fname;
	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);
	497	if (fname)
	498	unlink(fname);
	499	os_free(fname);
	500
	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 "
	506	"behind");
	507	} else {
	508	perror("rmdir[ctrl_interface]");
	509	}
	510	}
	511	}
	512
	513	dst = hapd->ctrl_dst;
	514	while (dst) {
	515	prev = dst;
	516	dst = dst->next;
	517	os_free(prev);
	518	}
	519	}
	520
	521
42d16805 JM	522	static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
42d16805 JM	523	const char *buf, size_t len)
6fc6879b JM	524	{
	525	struct wpa_ctrl_dst dst, next;
	526	struct msghdr msg;
	527	int idx;
	528	struct iovec io[2];
	529	char levelstr[10];
	530
	531	dst = hapd->ctrl_dst;
	532	if (hapd->ctrl_sock < 0 \|\| dst == NULL)
	533	return;
	534
	535	os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
	536	io[0].iov_base = levelstr;
	537	io[0].iov_len = os_strlen(levelstr);
42d16805	538	io[1].iov_base = (char *) buf;
6fc6879b JM	539	io[1].iov_len = len;
	540	os_memset(&msg, 0, sizeof(msg));
	541	msg.msg_iov = io;
	542	msg.msg_iovlen = 2;
	543
	544	idx = 0;
	545	while (dst) {
	546	next = dst->next;
	547	if (level >= dst->debug_level) {
	548	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
75864b7f JM	549	(u8 *) dst->addr.sun_path, dst->addrlen -
75864b7f JM	550	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	551	msg.msg_name = &dst->addr;
	552	msg.msg_namelen = dst->addrlen;
	553	if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
c5aaa015 JM	554	int _errno = errno;
	555	wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
	556	"%d - %s",
	557	idx, errno, strerror(errno));
6fc6879b	558	dst->errors++;
c5aaa015	559	if (dst->errors > 10 \|\| _errno == ENOENT) {
6fc6879b JM	560	hostapd_ctrl_iface_detach(
	561	hapd, &dst->addr,
	562	dst->addrlen);
	563	}
	564	} else
	565	dst->errors = 0;
	566	}
	567	idx++;
	568	dst = next;
	569	}
	570	}
	571
	572	#endif /* CONFIG_NATIVE_WINDOWS */