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

/*
 * hostapd / UNIX domain socket -based control interface
 * Copyright (c) 2004-2008, 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 "includes.h"

#ifndef CONFIG_NATIVE_WINDOWS

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

#include "hostapd.h"
#include "eloop.h"
#include "config.h"
#include "ieee802_1x.h"
#include "wpa.h"
#include "radius/radius_client.h"
#include "ieee802_11.h"
#include "ctrl_iface.h"
#include "sta_info.h"
#include "accounting.h"
#include "wps_hostapd.h"
#include "drivers/driver.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_sta_mib(struct hostapd_data *hapd,
				      struct sta_info *sta,
				      char *buf, size_t buflen)
{
	int len, res, ret;

	if (sta == NULL) {
		ret = os_snprintf(buf, buflen, "FAIL\n");
		if (ret < 0 || (size_t) ret >= buflen)
			return 0;
		return ret;
	}

	len = 0;
	ret = os_snprintf(buf + len, buflen - len, MACSTR "\n",
			  MAC2STR(sta->addr));
	if (ret < 0 || (size_t) ret >= buflen - len)
		return len;
	len += ret;

	res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
	if (res >= 0)
		len += res;
	res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
	if (res >= 0)
		len += res;
	res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
	if (res >= 0)
		len += res;

	return len;
}


static int hostapd_ctrl_iface_sta_first(struct hostapd_data *hapd,
					char *buf, size_t buflen)
{
	return hostapd_ctrl_iface_sta_mib(hapd, hapd->sta_list, buf, buflen);
}


static int hostapd_ctrl_iface_sta(struct hostapd_data *hapd,
				  const char *txtaddr,
				  char *buf, size_t buflen)
{
	u8 addr[ETH_ALEN];
	int ret;

	if (hwaddr_aton(txtaddr, addr)) {
		ret = os_snprintf(buf, buflen, "FAIL\n");
		if (ret < 0 || (size_t) ret >= buflen)
			return 0;
		return ret;
	}
	return hostapd_ctrl_iface_sta_mib(hapd, ap_get_sta(hapd, addr),
					  buf, buflen);
}


static int hostapd_ctrl_iface_sta_next(struct hostapd_data *hapd,
				       const char *txtaddr,
				       char *buf, size_t buflen)
{
	u8 addr[ETH_ALEN];
	struct sta_info *sta;
	int ret;

	if (hwaddr_aton(txtaddr, addr) ||
	    (sta = ap_get_sta(hapd, addr)) == NULL) {
		ret = os_snprintf(buf, buflen, "FAIL\n");
		if (ret < 0 || (size_t) ret >= buflen)
			return 0;
		return ret;
	}		
	return hostapd_ctrl_iface_sta_mib(hapd, sta->next, buf, buflen);
}


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_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))
		return -1;

	os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
	ieee802_11_send_sa_query_req(hapd, addr, trans_id);

	return 0;
}
#endif /* NEED_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;
		}
		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;
		}
	} 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_MLME
	} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
		if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
			reply_len = -1;
#endif /* NEED_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);
	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	/*
	2	* hostapd / UNIX domain socket -based control interface
	3	* Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
	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
	15	#include "includes.h"
	16
	17	#ifndef CONFIG_NATIVE_WINDOWS
	18
	19	#include <sys/un.h>
	20	#include <sys/stat.h>
75864b7f	21	#include <stddef.h>
6fc6879b JM	22
	23	#include "hostapd.h"
	24	#include "eloop.h"
	25	#include "config.h"
	26	#include "ieee802_1x.h"
	27	#include "wpa.h"
	28	#include "radius/radius_client.h"
	29	#include "ieee802_11.h"
	30	#include "ctrl_iface.h"
	31	#include "sta_info.h"
	32	#include "accounting.h"
ad08c363	33	#include "wps_hostapd.h"
c5121837	34	#include "drivers/driver.h"
6fc6879b JM	35
	36
	37	struct wpa_ctrl_dst {
	38	struct wpa_ctrl_dst *next;
	39	struct sockaddr_un addr;
	40	socklen_t addrlen;
	41	int debug_level;
	42	int errors;
	43	};
	44
	45
42d16805 JM	46	static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
	47	const char *buf, size_t len);
	48
	49
6fc6879b JM	50	static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
	51	struct sockaddr_un *from,
	52	socklen_t fromlen)
	53	{
	54	struct wpa_ctrl_dst *dst;
	55
	56	dst = os_zalloc(sizeof(*dst));
	57	if (dst == NULL)
	58	return -1;
	59	os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
	60	dst->addrlen = fromlen;
	61	dst->debug_level = MSG_INFO;
	62	dst->next = hapd->ctrl_dst;
	63	hapd->ctrl_dst = dst;
	64	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
75864b7f JM	65	(u8 *) from->sun_path,
75864b7f JM	66	fromlen - offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	67	return 0;
	68	}
	69
	70
	71	static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
	72	struct sockaddr_un *from,
	73	socklen_t fromlen)
	74	{
	75	struct wpa_ctrl_dst dst, prev = NULL;
	76
	77	dst = hapd->ctrl_dst;
	78	while (dst) {
	79	if (fromlen == dst->addrlen &&
75864b7f JM	80	os_memcmp(from->sun_path, dst->addr.sun_path,
	81	fromlen - offsetof(struct sockaddr_un, sun_path))
	82	== 0) {
6fc6879b JM	83	if (prev == NULL)
	84	hapd->ctrl_dst = dst->next;
	85	else
	86	prev->next = dst->next;
	87	os_free(dst);
	88	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
75864b7f JM	89	(u8 *) from->sun_path,
	90	fromlen -
	91	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	92	return 0;
	93	}
	94	prev = dst;
	95	dst = dst->next;
	96	}
	97	return -1;
	98	}
	99
	100
	101	static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
	102	struct sockaddr_un *from,
	103	socklen_t fromlen,
	104	char *level)
	105	{
	106	struct wpa_ctrl_dst *dst;
	107
	108	wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
	109
	110	dst = hapd->ctrl_dst;
	111	while (dst) {
	112	if (fromlen == dst->addrlen &&
75864b7f JM	113	os_memcmp(from->sun_path, dst->addr.sun_path,
	114	fromlen - offsetof(struct sockaddr_un, sun_path))
	115	== 0) {
6fc6879b	116	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
75864b7f JM	117	"level", (u8 *) from->sun_path, fromlen -
75864b7f JM	118	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	119	dst->debug_level = atoi(level);
	120	return 0;
	121	}
	122	dst = dst->next;
	123	}
	124
	125	return -1;
	126	}
	127
	128
	129	static int hostapd_ctrl_iface_sta_mib(struct hostapd_data *hapd,
	130	struct sta_info *sta,
	131	char *buf, size_t buflen)
	132	{
	133	int len, res, ret;
	134
	135	if (sta == NULL) {
	136	ret = os_snprintf(buf, buflen, "FAIL\n");
	137	if (ret < 0 \|\| (size_t) ret >= buflen)
	138	return 0;
	139	return ret;
	140	}
	141
	142	len = 0;
	143	ret = os_snprintf(buf + len, buflen - len, MACSTR "\n",
	144	MAC2STR(sta->addr));
	145	if (ret < 0 \|\| (size_t) ret >= buflen - len)
	146	return len;
	147	len += ret;
	148
	149	res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
	150	if (res >= 0)
	151	len += res;
	152	res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
	153	if (res >= 0)
	154	len += res;
	155	res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
	156	if (res >= 0)
	157	len += res;
	158
	159	return len;
	160	}
	161
	162
	163	static int hostapd_ctrl_iface_sta_first(struct hostapd_data *hapd,
	164	char *buf, size_t buflen)
	165	{
	166	return hostapd_ctrl_iface_sta_mib(hapd, hapd->sta_list, buf, buflen);
	167	}
	168
	169
	170	static int hostapd_ctrl_iface_sta(struct hostapd_data *hapd,
	171	const char *txtaddr,
	172	char *buf, size_t buflen)
	173	{
	174	u8 addr[ETH_ALEN];
	175	int ret;
	176
	177	if (hwaddr_aton(txtaddr, addr)) {
	178	ret = os_snprintf(buf, buflen, "FAIL\n");
	179	if (ret < 0 \|\| (size_t) ret >= buflen)
	180	return 0;
	181	return ret;
	182	}
183	return hostapd_ctrl_iface_sta_mib(hapd, ap_get_sta(hapd, addr),
184	buf, buflen);
185	}
186
187
188	static int hostapd_ctrl_iface_sta_next(struct hostapd_data *hapd,
189	const char *txtaddr,
190	char *buf, size_t buflen)
191	{
192	u8 addr[ETH_ALEN];
193	struct sta_info *sta;
194	int ret;
195
196	if (hwaddr_aton(txtaddr, addr) \|\|
197	(sta = ap_get_sta(hapd, addr)) == NULL) {
198	ret = os_snprintf(buf, buflen, "FAIL\n");
199	if (ret < 0 \|\| (size_t) ret >= buflen)
200	return 0;
201	return ret;
202	}
203	return hostapd_ctrl_iface_sta_mib(hapd, sta->next, buf, buflen);
204	}
205
206
207	static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
208	const char *txtaddr)
209	{
210	u8 addr[ETH_ALEN];
211	struct sta_info *sta;
212
213	wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
214
215	if (hwaddr_aton(txtaddr, addr))
216	return -1;
217
218	sta = ap_get_sta(hapd, addr);
219	if (sta)
220	return 0;
221
222	wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
223	"notification", MAC2STR(addr));
224	sta = ap_sta_add(hapd, addr);
225	if (sta == NULL)
226	return -1;
227
228	hostapd_new_assoc_sta(hapd, sta, 0);
6fc6879b JM	229	return 0;
	230	}
	231
	232
88b4b424	233	#ifdef CONFIG_IEEE80211W
c5121837	234	#ifdef NEED_MLME
88b4b424 JM	235	static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
	236	const char *txtaddr)
	237	{
	238	u8 addr[ETH_ALEN];
	239	u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
	240
	241	wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
	242
	243	if (hwaddr_aton(txtaddr, addr))
	244	return -1;
	245
	246	os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
	247	ieee802_11_send_sa_query_req(hapd, addr, trans_id);
	248
	249	return 0;
	250	}
c5121837	251	#endif /* NEED_MLME */
88b4b424 JM	252	#endif /* CONFIG_IEEE80211W */
	253
	254
ad08c363 JM	255	#ifdef CONFIG_WPS
	256	static int hostapd_ctrl_iface_wps_pin(struct hostapd_data hapd, char txt)
	257	{
	258	char *pin = os_strchr(txt, ' ');
077a781f JM	259	char *timeout_txt;
	260	int timeout;
	261
ad08c363 JM	262	if (pin == NULL)
	263	return -1;
	264	*pin++ = '\0';
077a781f JM	265
	266	timeout_txt = os_strchr(pin, ' ');
	267	if (timeout_txt) {
	268	*timeout_txt++ = '\0';
	269	timeout = atoi(timeout_txt);
	270	} else
	271	timeout = 0;
	272
	273	return hostapd_wps_add_pin(hapd, txt, pin, timeout);
ad08c363	274	}
46bdb83a MH	275
46bdb83a MH	276
116f7bb0	277	#ifdef CONFIG_WPS_OOB
46bdb83a MH	278	static int hostapd_ctrl_iface_wps_oob(struct hostapd_data hapd, char txt)
46bdb83a MH	279	{
e1ee6b60	280	char path, method, *name;
46bdb83a MH	281
	282	path = os_strchr(txt, ' ');
	283	if (path == NULL)
	284	return -1;
	285	*path++ = '\0';
	286
	287	method = os_strchr(path, ' ');
	288	if (method == NULL)
	289	return -1;
	290	*method++ = '\0';
	291
e1ee6b60 MH	292	name = os_strchr(method, ' ');
	293	if (name != NULL)
	294	*name++ = '\0';
	295
	296	return hostapd_wps_start_oob(hapd, txt, path, method, name);
46bdb83a	297	}
116f7bb0	298	#endif /* CONFIG_WPS_OOB */
ad08c363 JM	299	#endif /* CONFIG_WPS */
	300
	301
6fc6879b JM	302	static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
	303	void *sock_ctx)
	304	{
	305	struct hostapd_data *hapd = eloop_ctx;
	306	char buf[256];
	307	int res;
	308	struct sockaddr_un from;
	309	socklen_t fromlen = sizeof(from);
	310	char *reply;
	311	const int reply_size = 4096;
	312	int reply_len;
	313
	314	res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
	315	(struct sockaddr *) &from, &fromlen);
	316	if (res < 0) {
	317	perror("recvfrom(ctrl_iface)");
	318	return;
	319	}
	320	buf[res] = '\0';
	321	wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
	322
	323	reply = os_malloc(reply_size);
	324	if (reply == NULL) {
	325	sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
	326	fromlen);
	327	return;
	328	}
	329
	330	os_memcpy(reply, "OK\n", 3);
	331	reply_len = 3;
	332
	333	if (os_strcmp(buf, "PING") == 0) {
	334	os_memcpy(reply, "PONG\n", 5);
	335	reply_len = 5;
	336	} else if (os_strcmp(buf, "MIB") == 0) {
	337	reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
	338	if (reply_len >= 0) {
	339	res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
	340	reply_size - reply_len);
	341	if (res < 0)
	342	reply_len = -1;
	343	else
	344	reply_len += res;
	345	}
	346	if (reply_len >= 0) {
	347	res = ieee802_1x_get_mib(hapd, reply + reply_len,
	348	reply_size - reply_len);
	349	if (res < 0)
	350	reply_len = -1;
	351	else
	352	reply_len += res;
	353	}
	354	if (reply_len >= 0) {
	355	res = radius_client_get_mib(hapd->radius,
	356	reply + reply_len,
	357	reply_size - reply_len);
	358	if (res < 0)
	359	reply_len = -1;
	360	else
	361	reply_len += res;
	362	}
	363	} else if (os_strcmp(buf, "STA-FIRST") == 0) {
	364	reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
	365	reply_size);
366	} else if (os_strncmp(buf, "STA ", 4) == 0) {
367	reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
368	reply_size);
369	} else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
370	reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
371	reply_size);
372	} else if (os_strcmp(buf, "ATTACH") == 0) {
373	if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
374	reply_len = -1;
375	} else if (os_strcmp(buf, "DETACH") == 0) {
376	if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
377	reply_len = -1;
378	} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
379	if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
380	buf + 6))
381	reply_len = -1;
382	} else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
383	if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
384	reply_len = -1;
88b4b424	385	#ifdef CONFIG_IEEE80211W
c5121837	386	#ifdef NEED_MLME
88b4b424 JM	387	} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
	388	if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
	389	reply_len = -1;
c5121837	390	#endif /* NEED_MLME */
88b4b424	391	#endif /* CONFIG_IEEE80211W */
ad08c363 JM	392	#ifdef CONFIG_WPS
	393	} else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
	394	if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
	395	reply_len = -1;
	396	} else if (os_strcmp(buf, "WPS_PBC") == 0) {
	397	if (hostapd_wps_button_pushed(hapd))
	398	reply_len = -1;
116f7bb0	399	#ifdef CONFIG_WPS_OOB
46bdb83a MH	400	} else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
	401	if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
	402	reply_len = -1;
116f7bb0	403	#endif /* CONFIG_WPS_OOB */
ad08c363	404	#endif /* CONFIG_WPS */
6fc6879b JM	405	} else {
	406	os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
	407	reply_len = 16;
	408	}
	409
	410	if (reply_len < 0) {
	411	os_memcpy(reply, "FAIL\n", 5);
	412	reply_len = 5;
	413	}
	414	sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
	415	os_free(reply);
	416	}
	417
	418
	419	static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
	420	{
	421	char *buf;
	422	size_t len;
	423
	424	if (hapd->conf->ctrl_interface == NULL)
	425	return NULL;
	426
	427	len = os_strlen(hapd->conf->ctrl_interface) +
	428	os_strlen(hapd->conf->iface) + 2;
	429	buf = os_malloc(len);
	430	if (buf == NULL)
	431	return NULL;
	432
	433	os_snprintf(buf, len, "%s/%s",
	434	hapd->conf->ctrl_interface, hapd->conf->iface);
	435	buf[len - 1] = '\0';
	436	return buf;
	437	}
	438
	439
42d16805 JM	440	static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
	441	const char *txt, size_t len)
	442	{
	443	struct hostapd_data *hapd = ctx;
	444	if (hapd == NULL)
	445	return;
	446	hostapd_ctrl_iface_send(hapd, level, txt, len);
	447	}
	448
	449
6fc6879b JM	450	int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
	451	{
	452	struct sockaddr_un addr;
	453	int s = -1;
	454	char *fname = NULL;
	455
	456	hapd->ctrl_sock = -1;
	457
	458	if (hapd->conf->ctrl_interface == NULL)
	459	return 0;
	460
	461	if (mkdir(hapd->conf->ctrl_interface, S_IRWXU \| S_IRWXG) < 0) {
	462	if (errno == EEXIST) {
	463	wpa_printf(MSG_DEBUG, "Using existing control "
	464	"interface directory.");
	465	} else {
	466	perror("mkdir[ctrl_interface]");
	467	goto fail;
	468	}
	469	}
	470
	471	if (hapd->conf->ctrl_interface_gid_set &&
	472	chown(hapd->conf->ctrl_interface, 0,
	473	hapd->conf->ctrl_interface_gid) < 0) {
	474	perror("chown[ctrl_interface]");
	475	return -1;
	476	}
	477
	478	if (os_strlen(hapd->conf->ctrl_interface) + 1 +
	479	os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
	480	goto fail;
	481
	482	s = socket(PF_UNIX, SOCK_DGRAM, 0);
	483	if (s < 0) {
	484	perror("socket(PF_UNIX)");
	485	goto fail;
	486	}
	487
	488	os_memset(&addr, 0, sizeof(addr));
75864b7f JM	489	#ifdef __FreeBSD__
	490	addr.sun_len = sizeof(addr);
	491	#endif /* __FreeBSD__ */
6fc6879b JM	492	addr.sun_family = AF_UNIX;
	493	fname = hostapd_ctrl_iface_path(hapd);
	494	if (fname == NULL)
	495	goto fail;
	496	os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
	497	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
617d1555 JM	498	wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
	499	strerror(errno));
	500	if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
	501	wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
	502	" allow connections - assuming it was left"
	503	"over from forced program termination");
	504	if (unlink(fname) < 0) {
	505	perror("unlink[ctrl_iface]");
	506	wpa_printf(MSG_ERROR, "Could not unlink "
	507	"existing ctrl_iface socket '%s'",
	508	fname);
	509	goto fail;
	510	}
	511	if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
	512	0) {
	513	perror("bind(PF_UNIX)");
	514	goto fail;
	515	}
	516	wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
	517	"ctrl_iface socket '%s'", fname);
	518	} else {
	519	wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
	520	"be in use - cannot override it");
	521	wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
	522	"not used anymore", fname);
	523	os_free(fname);
	524	fname = NULL;
	525	goto fail;
	526	}
6fc6879b JM	527	}
	528
	529	if (hapd->conf->ctrl_interface_gid_set &&
	530	chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
	531	perror("chown[ctrl_interface/ifname]");
	532	goto fail;
	533	}
	534
	535	if (chmod(fname, S_IRWXU \| S_IRWXG) < 0) {
	536	perror("chmod[ctrl_interface/ifname]");
	537	goto fail;
	538	}
	539	os_free(fname);
	540
	541	hapd->ctrl_sock = s;
	542	eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
	543	NULL);
42d16805	544	wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
6fc6879b JM	545
	546	return 0;
	547
	548	fail:
	549	if (s >= 0)
	550	close(s);
	551	if (fname) {
	552	unlink(fname);
	553	os_free(fname);
	554	}
	555	return -1;
	556	}
	557
	558
	559	void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
	560	{
	561	struct wpa_ctrl_dst dst, prev;
	562
	563	if (hapd->ctrl_sock > -1) {
	564	char *fname;
	565	eloop_unregister_read_sock(hapd->ctrl_sock);
	566	close(hapd->ctrl_sock);
	567	hapd->ctrl_sock = -1;
	568	fname = hostapd_ctrl_iface_path(hapd);
	569	if (fname)
	570	unlink(fname);
	571	os_free(fname);
	572
	573	if (hapd->conf->ctrl_interface &&
	574	rmdir(hapd->conf->ctrl_interface) < 0) {
	575	if (errno == ENOTEMPTY) {
	576	wpa_printf(MSG_DEBUG, "Control interface "
	577	"directory not empty - leaving it "
	578	"behind");
	579	} else {
	580	perror("rmdir[ctrl_interface]");
	581	}
	582	}
	583	}
	584
	585	dst = hapd->ctrl_dst;
	586	while (dst) {
	587	prev = dst;
	588	dst = dst->next;
	589	os_free(prev);
	590	}
	591	}
	592
	593
42d16805 JM	594	static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
42d16805 JM	595	const char *buf, size_t len)
6fc6879b JM	596	{
	597	struct wpa_ctrl_dst dst, next;
	598	struct msghdr msg;
	599	int idx;
	600	struct iovec io[2];
	601	char levelstr[10];
	602
	603	dst = hapd->ctrl_dst;
	604	if (hapd->ctrl_sock < 0 \|\| dst == NULL)
	605	return;
	606
	607	os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
	608	io[0].iov_base = levelstr;
	609	io[0].iov_len = os_strlen(levelstr);
42d16805	610	io[1].iov_base = (char *) buf;
6fc6879b JM	611	io[1].iov_len = len;
	612	os_memset(&msg, 0, sizeof(msg));
	613	msg.msg_iov = io;
	614	msg.msg_iovlen = 2;
	615
	616	idx = 0;
	617	while (dst) {
	618	next = dst->next;
	619	if (level >= dst->debug_level) {
	620	wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
75864b7f JM	621	(u8 *) dst->addr.sun_path, dst->addrlen -
75864b7f JM	622	offsetof(struct sockaddr_un, sun_path));
6fc6879b JM	623	msg.msg_name = &dst->addr;
	624	msg.msg_namelen = dst->addrlen;
	625	if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
c5aaa015 JM	626	int _errno = errno;
	627	wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
	628	"%d - %s",
	629	idx, errno, strerror(errno));
6fc6879b	630	dst->errors++;
c5aaa015	631	if (dst->errors > 10 \|\| _errno == ENOENT) {
6fc6879b JM	632	hostapd_ctrl_iface_detach(
	633	hapd, &dst->addr,
	634	dst->addrlen);
	635	}
	636	} else
	637	dst->errors = 0;
	638	}
	639	idx++;
	640	dst = next;
	641	}
	642	}
	643
	644	#endif /* CONFIG_NATIVE_WINDOWS */