[thirdparty/iw.git] / iw.c

/*
 * nl80211 userspace tool
 *
 * Copyright 2007, 2008	Johannes Berg <johannes@sipsolutions.net>
 */

#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
                     
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>  
#include <netlink/msg.h>
#include <netlink/attr.h>

#include "nl80211.h"
#include "iw.h"
#include "version.h"

#ifndef CONFIG_LIBNL20
/* libnl 2.0 compatibility code */

static inline struct nl_handle *nl_socket_alloc(void)
{
	return nl_handle_alloc();
}

static inline void nl_socket_free(struct nl_sock *h)
{
	nl_handle_destroy(h);
}

static inline int __genl_ctrl_alloc_cache(struct nl_sock *h, struct nl_cache **cache)
{
	struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
	if (!tmp)
		return -ENOMEM;
	*cache = tmp;
	return 0;
}
#define genl_ctrl_alloc_cache __genl_ctrl_alloc_cache
#endif /* CONFIG_LIBNL20 */

static int debug = 0;

static int nl80211_init(struct nl80211_state *state)
{
	int err;

	state->nl_sock = nl_socket_alloc();
	if (!state->nl_sock) {
		fprintf(stderr, "Failed to allocate netlink socket.\n");
		return -ENOMEM;
	}

	if (genl_connect(state->nl_sock)) {
		fprintf(stderr, "Failed to connect to generic netlink.\n");
		err = -ENOLINK;
		goto out_handle_destroy;
	}

	if (genl_ctrl_alloc_cache(state->nl_sock, &state->nl_cache)) {
		fprintf(stderr, "Failed to allocate generic netlink cache.\n");
		err = -ENOMEM;
		goto out_handle_destroy;
	}

	state->nl80211 = genl_ctrl_search_by_name(state->nl_cache, "nl80211");
	if (!state->nl80211) {
		fprintf(stderr, "nl80211 not found.\n");
		err = -ENOENT;
		goto out_cache_free;
	}

	return 0;

 out_cache_free:
	nl_cache_free(state->nl_cache);
 out_handle_destroy:
	nl_socket_free(state->nl_sock);
	return err;
}

static void nl80211_cleanup(struct nl80211_state *state)
{
	genl_family_put(state->nl80211);
	nl_cache_free(state->nl_cache);
	nl_socket_free(state->nl_sock);
}

__COMMAND(NULL, NULL, NULL, 0, 0, 0, CIB_NONE, NULL);
__COMMAND(NULL, NULL, NULL, 1, 0, 0, CIB_NONE, NULL);

static int cmd_size;

static void usage(const char *argv0)
{
	struct cmd *cmd;

	fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
	fprintf(stderr, "Options:\n");
	fprintf(stderr, "\t--debug\t\tenable netlink debugging\n");
	fprintf(stderr, "\t--version\tshow version\n");
	fprintf(stderr, "Commands:\n");
	fprintf(stderr, "\thelp\n");
	fprintf(stderr, "\tevent\n");
	for (cmd = &__start___cmd; cmd < &__stop___cmd;
	     cmd = (struct cmd *)((char *)cmd + cmd_size)) {
		if (!cmd->handler || cmd->hidden)
			continue;
		switch (cmd->idby) {
		case CIB_NONE:
			fprintf(stderr, "\t");
			/* fall through */
		case CIB_PHY:
			if (cmd->idby == CIB_PHY)
				fprintf(stderr, "\tphy <phyname> ");
			/* fall through */
		case CIB_NETDEV:
			if (cmd->idby == CIB_NETDEV)
				fprintf(stderr, "\tdev <devname> ");
			if (cmd->section)
				fprintf(stderr, "%s ", cmd->section);
			fprintf(stderr, "%s", cmd->name);
			if (cmd->args)
				fprintf(stderr, " %s", cmd->args);
			fprintf(stderr, "\n");
			break;
		}
	}
}

static void version(void)
{
	printf("iw version " IW_VERSION "\n");
}

static int phy_lookup(char *name)
{
	char buf[200];
	int fd, pos;

	snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", name);

	fd = open(buf, O_RDONLY);
	pos = read(fd, buf, sizeof(buf) - 1);
	if (pos < 0)
		return -1;
	buf[pos] = '\0';
	return atoi(buf);
}

static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
			 void *arg)
{
	int *ret = arg;
	*ret = err->error;
	return NL_STOP;
}

static int finish_handler(struct nl_msg *msg, void *arg)
{
	int *ret = arg;
	*ret = 0;
	return NL_SKIP;
}

static int ack_handler(struct nl_msg *msg, void *arg)
{
	int *ret = arg;
	*ret = 0;
	return NL_STOP;
}

static int handle_cmd(struct nl80211_state *state,
		      enum command_identify_by idby,
		      int argc, char **argv)
{
	struct cmd *cmd;
	struct nl_cb *cb = NULL;
	struct nl_msg *msg;
	int devidx = 0;
	int err;
	const char *command, *section;

	if (argc <= 1 && idby != CIB_NONE)
		return 1;

	switch (idby) {
	case CIB_PHY:
		devidx = phy_lookup(*argv);
		argc--;
		argv++;
		break;
	case CIB_NETDEV:
		devidx = if_nametoindex(*argv);
		argc--;
		argv++;
		break;
	default:
		break;
	}

	section = command = *argv;
	argc--;
	argv++;

	for (cmd = &__start___cmd; cmd < &__stop___cmd;
	     cmd = (struct cmd *)((char *)cmd + cmd_size)) {
		if (!cmd->handler)
			continue;
		if (cmd->idby != idby)
			continue;
		if (cmd->section) {
			if (strcmp(cmd->section, section))
				continue;
			/* this is a bit icky ... */
			if (command == section) {
				if (argc <= 0)
					return 1;
				command = *argv;
				argc--;
				argv++;
			}
		} else if (section != command)
			continue;
		if (strcmp(cmd->name, command))
			continue;
		if (argc && !cmd->args)
			continue;
		break;
	}

	if (cmd >= &__stop___cmd)
		return 1;

	msg = nlmsg_alloc();
	if (!msg) {
		fprintf(stderr, "failed to allocate netlink message\n");
		return 2;
	}

	cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
	if (!cb) {
		fprintf(stderr, "failed to allocate netlink callbacks\n");
		err = 2;
		goto out_free_msg;
	}

	genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0,
		    cmd->nl_msg_flags, cmd->cmd, 0);

	switch (idby) {
	case CIB_PHY:
		NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
		break;
	case CIB_NETDEV:
		NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
		break;
	default:
		break;
	}

	err = cmd->handler(cb, msg, argc, argv);
	if (err)
		goto out;

	err = nl_send_auto_complete(state->nl_sock, msg);
	if (err < 0)
		goto out;

	err = 1;

	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);

	while (err > 0)
		nl_recvmsgs(state->nl_sock, cb);
 out:
	nl_cb_put(cb);
 out_free_msg:
	nlmsg_free(msg);
	return err;
 nla_put_failure:
	fprintf(stderr, "building message failed\n");
	return 2;
}

static int no_seq_check(struct nl_msg *msg, void *arg)
{
	return NL_OK;
}

static int print_event(struct nl_msg *msg, void *arg)
{
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	char ifname[100];
	__u8 reg_type;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);
                          
	switch (gnlh->cmd) {
	case NL80211_CMD_NEW_WIPHY:
		printf("wiphy rename: phy #%d to %s\n",
		       nla_get_u32(tb[NL80211_ATTR_WIPHY]),
		       nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
		break;
	case NL80211_CMD_NEW_SCAN_RESULTS:
		if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
		printf("scan finished on %s (phy #%d)\n",
		       ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
		break;
	case NL80211_CMD_SCAN_ABORTED:
		if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
		printf("scan aborted on %s (phy #%d)\n",
		       ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
		break;
	case NL80211_CMD_REG_CHANGE:

		printf("regulatory domain change: ");

		reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);

		switch (reg_type) {
		case NL80211_REGDOM_TYPE_COUNTRY:
			printf("set to %s by %s request",
			       nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
			       reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
			if (tb[NL80211_ATTR_WIPHY])
				printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
			break;
		case NL80211_REGDOM_TYPE_WORLD:
			printf("set to world roaming by %s request",
			       reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
			break;
		case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
			printf("custom world roaming rules in place on phy%d by %s request",
			       nla_get_u32(tb[NL80211_ATTR_WIPHY]),
			       reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
			break;
		case NL80211_REGDOM_TYPE_INTERSECTION:
			printf("intersection used due to a request made by %s",
			       reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
			if (tb[NL80211_ATTR_WIPHY])
				printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
			break;
		default:
			printf("unknown source (upgrade this utility)");
			break;
		}

		printf("\n");
		break;
	default:
		printf("unknown event: %d\n", gnlh->cmd);
		break;
	}

	return NL_SKIP;
}

static int listen_events(struct nl80211_state *state,
			 int argc, char **argv)
{
	int mcid, ret;
	struct nl_cb *cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);

	if (!cb) {
		fprintf(stderr, "failed to allocate netlink callbacks\n");
		return -ENOMEM;
	}

	/* Configuration multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
	if (mcid < 0)
		return mcid;

	ret = nl_socket_add_membership(state->nl_sock, mcid);
	if (ret)
		return ret;

	/* Scan multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
	if (mcid >= 0) {
		ret = nl_socket_add_membership(state->nl_sock, mcid);
		if (ret)
			return ret;
	}

	/* Regulatory multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
	if (mcid >= 0) {
		ret = nl_socket_add_membership(state->nl_sock, mcid);
		if (ret)
			return ret;
	}

	/* no sequence checking for multicast messages */
	nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, NULL);

	while (1)
		nl_recvmsgs(state->nl_sock, cb);

	nl_cb_put(cb);

	return 0;
}

int main(int argc, char **argv)
{
	struct nl80211_state nlstate;
	int err;
	const char *argv0;

	/* calculate command size including padding */
	cmd_size = abs((long)&__cmd_NULL_1_CIB_NONE_0
	             - (long)&__cmd_NULL_0_CIB_NONE_0);
	/* strip off self */
	argc--;
	argv0 = *argv++;

	if (argc > 0 && strcmp(*argv, "--debug") == 0) {
		debug = 1;
		argc--;
		argv++;
	}

	if (argc > 0 && strcmp(*argv, "--version") == 0) {
		version();
		return 0;
	}

	if (argc == 0 || strcmp(*argv, "help") == 0) {
		usage(argv0);
		return 0;
	}

	err = nl80211_init(&nlstate);
	if (err)
		return 1;

	if (strcmp(*argv, "event") == 0) {
		err = listen_events(&nlstate, argc, argv);
	} else if (strcmp(*argv, "dev") == 0) {
		argc--;
		argv++;
		err = handle_cmd(&nlstate, CIB_NETDEV, argc, argv);
	} else if (strcmp(*argv, "phy") == 0) {
		argc--;
		argv++;
		err = handle_cmd(&nlstate, CIB_PHY, argc, argv);
	} else
		err = handle_cmd(&nlstate, CIB_NONE, argc, argv);

	if (err == 1)
		usage(argv0);
	if (err < 0)
		fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);

	nl80211_cleanup(&nlstate);

	return err;
}
Commit	Line	Data
cad53b3f JB	1	/*
	2	* nl80211 userspace tool
	3	*
2a1fced2	4	* Copyright 2007, 2008 Johannes Berg <johannes@sipsolutions.net>
cad53b3f JB	5	*/
	6
	7	#include <errno.h>
	8	#include <stdio.h>
d5ac8ad3	9	#include <string.h>
bd396f2a JB	10	#include <net/if.h>
	11	#include <sys/types.h>
	12	#include <sys/stat.h>
	13	#include <fcntl.h>
	14	#include <unistd.h>
	15
cad53b3f JB	16	#include <netlink/genl/genl.h>
	17	#include <netlink/genl/family.h>
	18	#include <netlink/genl/ctrl.h>
	19	#include <netlink/msg.h>
	20	#include <netlink/attr.h>
cad53b3f	21
f408e01b	22	#include "nl80211.h"
cad53b3f	23	#include "iw.h"
d711f013	24	#include "version.h"
cad53b3f	25
dfd13ee5 PE	26	#ifndef CONFIG_LIBNL20
	27	/* libnl 2.0 compatibility code */
	28
	29	static inline struct nl_handle *nl_socket_alloc(void)
	30	{
	31	return nl_handle_alloc();
	32	}
	33
57077d64	34	static inline void nl_socket_free(struct nl_sock *h)
dfd13ee5 PE	35	{
	36	nl_handle_destroy(h);
	37	}
	38
57077d64	39	static inline int __genl_ctrl_alloc_cache(struct nl_sock h, struct nl_cache *cache)
dfd13ee5 PE	40	{
	41	struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
	42	if (!tmp)
	43	return -ENOMEM;
	44	*cache = tmp;
	45	return 0;
	46	}
	47	#define genl_ctrl_alloc_cache __genl_ctrl_alloc_cache
	48	#endif /* CONFIG_LIBNL20 */
	49
656aa246	50	static int debug = 0;
cad53b3f JB	51
	52	static int nl80211_init(struct nl80211_state *state)
	53	{
	54	int err;
	55
57077d64 PE	56	state->nl_sock = nl_socket_alloc();
	57	if (!state->nl_sock) {
	58	fprintf(stderr, "Failed to allocate netlink socket.\n");
cad53b3f JB	59	return -ENOMEM;
	60	}
	61
57077d64	62	if (genl_connect(state->nl_sock)) {
cad53b3f JB	63	fprintf(stderr, "Failed to connect to generic netlink.\n");
	64	err = -ENOLINK;
	65	goto out_handle_destroy;
	66	}
	67
57077d64	68	if (genl_ctrl_alloc_cache(state->nl_sock, &state->nl_cache)) {
cad53b3f JB	69	fprintf(stderr, "Failed to allocate generic netlink cache.\n");
	70	err = -ENOMEM;
	71	goto out_handle_destroy;
	72	}
	73
	74	state->nl80211 = genl_ctrl_search_by_name(state->nl_cache, "nl80211");
	75	if (!state->nl80211) {
	76	fprintf(stderr, "nl80211 not found.\n");
	77	err = -ENOENT;
	78	goto out_cache_free;
	79	}
	80
	81	return 0;
	82
	83	out_cache_free:
	84	nl_cache_free(state->nl_cache);
	85	out_handle_destroy:
57077d64	86	nl_socket_free(state->nl_sock);
cad53b3f JB	87	return err;
	88	}
	89
	90	static void nl80211_cleanup(struct nl80211_state *state)
	91	{
	92	genl_family_put(state->nl80211);
	93	nl_cache_free(state->nl_cache);
57077d64	94	nl_socket_free(state->nl_sock);
cad53b3f JB	95	}
cad53b3f JB	96
ce5af55c JB	97	__COMMAND(NULL, NULL, NULL, 0, 0, 0, CIB_NONE, NULL);
ce5af55c JB	98	__COMMAND(NULL, NULL, NULL, 1, 0, 0, CIB_NONE, NULL);
403b9c83 JB	99
	100	static int cmd_size;
	101
bd396f2a JB	102	static void usage(const char *argv0)
	103	{
	104	struct cmd *cmd;
	105
59c49f09 JB	106	fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
59c49f09 JB	107	fprintf(stderr, "Options:\n");
d711f013 JB	108	fprintf(stderr, "\t--debug\t\tenable netlink debugging\n");
d711f013 JB	109	fprintf(stderr, "\t--version\tshow version\n");
59c49f09	110	fprintf(stderr, "Commands:\n");
2c61ba61 JB	111	fprintf(stderr, "\thelp\n");
2c61ba61 JB	112	fprintf(stderr, "\tevent\n");
403b9c83 JB	113	for (cmd = &__start___cmd; cmd < &__stop___cmd;
403b9c83 JB	114	cmd = (struct cmd )((char )cmd + cmd_size)) {
ce5af55c	115	if (!cmd->handler \|\| cmd->hidden)
403b9c83	116	continue;
bd396f2a JB	117	switch (cmd->idby) {
bd396f2a JB	118	case CIB_NONE:
59c49f09	119	fprintf(stderr, "\t");
d631650b	120	/* fall through */
bd396f2a	121	case CIB_PHY:
d631650b	122	if (cmd->idby == CIB_PHY)
59c49f09	123	fprintf(stderr, "\tphy <phyname> ");
bd396f2a JB	124	/* fall through */
	125	case CIB_NETDEV:
	126	if (cmd->idby == CIB_NETDEV)
59c49f09	127	fprintf(stderr, "\tdev <devname> ");
bd396f2a JB	128	if (cmd->section)
	129	fprintf(stderr, "%s ", cmd->section);
	130	fprintf(stderr, "%s", cmd->name);
	131	if (cmd->args)
	132	fprintf(stderr, " %s", cmd->args);
	133	fprintf(stderr, "\n");
	134	break;
	135	}
	136	}
	137	}
	138
d711f013 JB	139	static void version(void)
d711f013 JB	140	{
2dc285b7	141	printf("iw version " IW_VERSION "\n");
d711f013 JB	142	}
d711f013 JB	143
bd396f2a JB	144	static int phy_lookup(char *name)
	145	{
	146	char buf[200];
	147	int fd, pos;
	148
	149	snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", name);
	150
	151	fd = open(buf, O_RDONLY);
	152	pos = read(fd, buf, sizeof(buf) - 1);
	153	if (pos < 0)
	154	return -1;
	155	buf[pos] = '\0';
	156	return atoi(buf);
	157	}
	158
70391ccf JB	159	static int error_handler(struct sockaddr_nl nla, struct nlmsgerr err,
	160	void *arg)
	161	{
	162	int *ret = arg;
	163	*ret = err->error;
	164	return NL_STOP;
	165	}
	166
561c5b7e JB	167	static int finish_handler(struct nl_msg msg, void arg)
561c5b7e JB	168	{
59c418c0 JB	169	int *ret = arg;
59c418c0 JB	170	*ret = 0;
561c5b7e JB	171	return NL_SKIP;
	172	}
	173
	174	static int ack_handler(struct nl_msg msg, void arg)
70391ccf JB	175	{
	176	int *ret = arg;
	177	*ret = 0;
	178	return NL_STOP;
	179	}
	180
d631650b JB	181	static int handle_cmd(struct nl80211_state *state,
	182	enum command_identify_by idby,
	183	int argc, char **argv)
45c7212c	184	{
bd396f2a	185	struct cmd *cmd;
70391ccf	186	struct nl_cb *cb = NULL;
bd396f2a JB	187	struct nl_msg *msg;
bd396f2a JB	188	int devidx = 0;
70391ccf	189	int err;
bd396f2a	190	const char command, section;
45c7212c	191
d631650b	192	if (argc <= 1 && idby != CIB_NONE)
5e75fd04	193	return 1;
45c7212c	194
bd396f2a JB	195	switch (idby) {
	196	case CIB_PHY:
	197	devidx = phy_lookup(*argv);
	198	argc--;
	199	argv++;
	200	break;
	201	case CIB_NETDEV:
	202	devidx = if_nametoindex(*argv);
	203	argc--;
	204	argv++;
	205	break;
	206	default:
	207	break;
	208	}
	209
	210	section = command = *argv;
	211	argc--;
	212	argv++;
	213
403b9c83 JB	214	for (cmd = &__start___cmd; cmd < &__stop___cmd;
	215	cmd = (struct cmd )((char )cmd + cmd_size)) {
	216	if (!cmd->handler)
	217	continue;
bd396f2a JB	218	if (cmd->idby != idby)
	219	continue;
	220	if (cmd->section) {
	221	if (strcmp(cmd->section, section))
	222	continue;
	223	/* this is a bit icky ... */
	224	if (command == section) {
	225	if (argc <= 0)
5e75fd04	226	return 1;
bd396f2a JB	227	command = *argv;
	228	argc--;
	229	argv++;
	230	}
	231	} else if (section != command)
	232	continue;
	233	if (strcmp(cmd->name, command))
	234	continue;
	235	if (argc && !cmd->args)
	236	continue;
	237	break;
	238	}
45c7212c	239
74701031	240	if (cmd >= &__stop___cmd)
5e75fd04	241	return 1;
45c7212c	242
bd396f2a JB	243	msg = nlmsg_alloc();
bd396f2a JB	244	if (!msg) {
70391ccf JB	245	fprintf(stderr, "failed to allocate netlink message\n");
	246	return 2;
	247	}
	248
59c49f09	249	cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
70391ccf JB	250	if (!cb) {
	251	fprintf(stderr, "failed to allocate netlink callbacks\n");
	252	err = 2;
	253	goto out_free_msg;
bd396f2a	254	}
45c7212c	255
bd396f2a JB	256	genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0,
	257	cmd->nl_msg_flags, cmd->cmd, 0);
	258
	259	switch (idby) {
	260	case CIB_PHY:
	261	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
	262	break;
	263	case CIB_NETDEV:
	264	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
	265	break;
	266	default:
	267	break;
	268	}
	269
70391ccf JB	270	err = cmd->handler(cb, msg, argc, argv);
	271	if (err)
	272	goto out;
	273
57077d64	274	err = nl_send_auto_complete(state->nl_sock, msg);
70391ccf JB	275	if (err < 0)
	276	goto out;
	277
c5c4471a JB	278	err = 1;
c5c4471a JB	279
70391ccf	280	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
59c418c0	281	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
561c5b7e	282	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
70391ccf	283
c5c4471a	284	while (err > 0)
57077d64	285	nl_recvmsgs(state->nl_sock, cb);
70391ccf JB	286	out:
	287	nl_cb_put(cb);
	288	out_free_msg:
	289	nlmsg_free(msg);
	290	return err;
bd396f2a JB	291	nla_put_failure:
bd396f2a JB	292	fprintf(stderr, "building message failed\n");
70391ccf	293	return 2;
45c7212c JB	294	}
45c7212c JB	295
2c61ba61 JB	296	static int no_seq_check(struct nl_msg msg, void arg)
	297	{
	298	return NL_OK;
	299	}
	300
	301	static int print_event(struct nl_msg msg, void arg)
	302	{
	303	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	304	struct nlattr *tb[NL80211_ATTR_MAX + 1];
99f46802	305	char ifname[100];
601c6ab2	306	__u8 reg_type;
2c61ba61 JB	307
	308	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	309	genlmsg_attrlen(gnlh, 0), NULL);
	310
	311	switch (gnlh->cmd) {
03109dcb	312	case NL80211_CMD_NEW_WIPHY:
2c61ba61 JB	313	printf("wiphy rename: phy #%d to %s\n",
	314	nla_get_u32(tb[NL80211_ATTR_WIPHY]),
	315	nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
	316	break;
99f46802 JB	317	case NL80211_CMD_NEW_SCAN_RESULTS:
	318	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	319	printf("scan finished on %s (phy #%d)\n",
	320	ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	321	break;
	322	case NL80211_CMD_SCAN_ABORTED:
	323	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	324	printf("scan aborted on %s (phy #%d)\n",
	325	ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	326	break;
601c6ab2 LR	327	case NL80211_CMD_REG_CHANGE:
	328
	329	printf("regulatory domain change: ");
	330
	331	reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);
	332
	333	switch (reg_type) {
	334	case NL80211_REGDOM_TYPE_COUNTRY:
	335	printf("set to %s by %s request",
	336	nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
	337	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	338	if (tb[NL80211_ATTR_WIPHY])
	339	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	340	break;
	341	case NL80211_REGDOM_TYPE_WORLD:
	342	printf("set to world roaming by %s request",
	343	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	344	break;
	345	case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
	346	printf("custom world roaming rules in place on phy%d by %s request",
	347	nla_get_u32(tb[NL80211_ATTR_WIPHY]),
	348	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	349	break;
	350	case NL80211_REGDOM_TYPE_INTERSECTION:
	351	printf("intersection used due to a request made by %s",
	352	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	353	if (tb[NL80211_ATTR_WIPHY])
	354	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	355	break;
	356	default:
	357	printf("unknown source (upgrade this utility)");
	358	break;
	359	}
	360
	361	printf("\n");
	362	break;
03109dcb JB	363	default:
	364	printf("unknown event: %d\n", gnlh->cmd);
	365	break;
2c61ba61 JB	366	}
	367
	368	return NL_SKIP;
	369	}
	370
	371	static int listen_events(struct nl80211_state *state,
	372	int argc, char **argv)
	373	{
	374	int mcid, ret;
	375	struct nl_cb *cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
	376
	377	if (!cb) {
	378	fprintf(stderr, "failed to allocate netlink callbacks\n");
	379	return -ENOMEM;
	380	}
	381
601c6ab2	382	/* Configuration multicast group */
57077d64	383	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
2c61ba61 JB	384	if (mcid < 0)
	385	return mcid;
	386
57077d64	387	ret = nl_socket_add_membership(state->nl_sock, mcid);
2c61ba61 JB	388	if (ret)
2c61ba61 JB	389	return ret;
99f46802	390
601c6ab2	391	/* Scan multicast group */
99f46802	392	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
5406d9e4 JB	393	if (mcid >= 0) {
	394	ret = nl_socket_add_membership(state->nl_sock, mcid);
	395	if (ret)
	396	return ret;
	397	}
99f46802	398
601c6ab2 LR	399	/* Regulatory multicast group */
	400	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
	401	if (mcid >= 0) {
	402	ret = nl_socket_add_membership(state->nl_sock, mcid);
	403	if (ret)
	404	return ret;
	405	}
	406
2c61ba61 JB	407	/* no sequence checking for multicast messages */
	408	nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
	409	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, NULL);
	410
	411	while (1)
57077d64	412	nl_recvmsgs(state->nl_sock, cb);
2c61ba61 JB	413
	414	nl_cb_put(cb);
	415
	416	return 0;
	417	}
	418
cad53b3f JB	419	int main(int argc, char **argv)
	420	{
	421	struct nl80211_state nlstate;
bd396f2a JB	422	int err;
bd396f2a JB	423	const char *argv0;
cad53b3f	424
f408e01b	425	/* calculate command size including padding */
ce5af55c JB	426	cmd_size = abs((long)&__cmd_NULL_1_CIB_NONE_0
ce5af55c JB	427	- (long)&__cmd_NULL_0_CIB_NONE_0);
45c7212c JB	428	/* strip off self */
45c7212c JB	429	argc--;
1cdd9016 MK	430	argv0 = *argv++;
1cdd9016 MK	431
59c49f09 JB	432	if (argc > 0 && strcmp(*argv, "--debug") == 0) {
	433	debug = 1;
	434	argc--;
	435	argv++;
	436	}
	437
d711f013 JB	438	if (argc > 0 && strcmp(*argv, "--version") == 0) {
	439	version();
	440	return 0;
	441	}
	442
bd396f2a	443	if (argc == 0 \|\| strcmp(*argv, "help") == 0) {
1cdd9016	444	usage(argv0);
4a972f80	445	return 0;
1cdd9016	446	}
45c7212c	447
2bdb6bd1 JB	448	err = nl80211_init(&nlstate);
	449	if (err)
	450	return 1;
	451
2c61ba61 JB	452	if (strcmp(*argv, "event") == 0) {
	453	err = listen_events(&nlstate, argc, argv);
	454	} else if (strcmp(*argv, "dev") == 0) {
14a0380d LR	455	argc--;
14a0380d LR	456	argv++;
d631650b	457	err = handle_cmd(&nlstate, CIB_NETDEV, argc, argv);
bd396f2a JB	458	} else if (strcmp(*argv, "phy") == 0) {
	459	argc--;
	460	argv++;
d631650b	461	err = handle_cmd(&nlstate, CIB_PHY, argc, argv);
bd396f2a	462	} else
d631650b	463	err = handle_cmd(&nlstate, CIB_NONE, argc, argv);
45c7212c	464
5e75fd04	465	if (err == 1)
bd396f2a	466	usage(argv0);
5e75fd04	467	if (err < 0)
b49be3e1	468	fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);
cad53b3f JB	469
	470	nl80211_cleanup(&nlstate);
	471
45c7212c	472	return err;
cad53b3f	473	}