[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");
			break;
		case CIB_PHY:
			fprintf(stderr, "\tphy <phyname> ");
			break;
		case CIB_NETDEV:
			fprintf(stderr, "\tdev <devname> ");
			break;
		}
		if (cmd->section)
			fprintf(stderr, "%s ", cmd->section);
		fprintf(stderr, "%s", cmd->name);
		if (cmd->args)
			fprintf(stderr, " %s", cmd->args);
		fprintf(stderr, "\n");
	}
}

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);
	if (fd < 0)
		return -1;
	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;
}

enum id_input {
	II_NONE,
	II_NETDEV,
	II_PHY_NAME,
	II_PHY_IDX,
};

static int handle_cmd(struct nl80211_state *state,
		      enum id_input 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;
	char *tmp;
	enum command_identify_by command_idby = CIB_NONE;

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

	switch (idby) {
	case II_PHY_IDX:
		command_idby = CIB_PHY;
		devidx = strtoul(*argv + 4, &tmp, 0);
		if (*tmp != '\0')
			return 1;
		argc--;
		argv++;
		break;
	case II_PHY_NAME:
		command_idby = CIB_PHY;
		devidx = phy_lookup(*argv);
		argc--;
		argv++;
		break;
	case II_NETDEV:
		command_idby = CIB_NETDEV;
		devidx = if_nametoindex(*argv);
		if (devidx == 0)
			devidx = -1;
		argc--;
		argv++;
		break;
	default:
		break;
	}

	if (devidx < 0)
		return -errno;

	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 != command_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 (command_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, II_NETDEV, argc, argv);
	} else if (strncmp(*argv, "phy", 3) == 0) {
		if (strlen(*argv) == 3) {
			argc--;
			argv++;
			err = handle_cmd(&nlstate, II_PHY_NAME, argc, argv);
		} else if (*(*argv + 3) == '#')
			err = handle_cmd(&nlstate, II_PHY_IDX, argc, argv);
		else
			err = 1;
	} else
		err = handle_cmd(&nlstate, II_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");
f83a81d0	120	break;
bd396f2a	121	case CIB_PHY:
f83a81d0 JB	122	fprintf(stderr, "\tphy <phyname> ");
f83a81d0 JB	123	break;
bd396f2a	124	case CIB_NETDEV:
f83a81d0	125	fprintf(stderr, "\tdev <devname> ");
bd396f2a JB	126	break;
bd396f2a JB	127	}
f83a81d0 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");
bd396f2a JB	134	}
	135	}
	136
d711f013 JB	137	static void version(void)
d711f013 JB	138	{
2dc285b7	139	printf("iw version " IW_VERSION "\n");
d711f013 JB	140	}
d711f013 JB	141
bd396f2a JB	142	static int phy_lookup(char *name)
	143	{
	144	char buf[200];
	145	int fd, pos;
	146
	147	snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", name);
	148
	149	fd = open(buf, O_RDONLY);
989e97c2 JB	150	if (fd < 0)
989e97c2 JB	151	return -1;
bd396f2a JB	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
9927363c JB	181	enum id_input {
	182	II_NONE,
	183	II_NETDEV,
	184	II_PHY_NAME,
	185	II_PHY_IDX,
	186	};
	187
d631650b	188	static int handle_cmd(struct nl80211_state *state,
9927363c	189	enum id_input idby,
d631650b	190	int argc, char **argv)
45c7212c	191	{
bd396f2a	192	struct cmd *cmd;
70391ccf	193	struct nl_cb *cb = NULL;
bd396f2a JB	194	struct nl_msg *msg;
bd396f2a JB	195	int devidx = 0;
70391ccf	196	int err;
bd396f2a	197	const char command, section;
9927363c JB	198	char *tmp;
9927363c JB	199	enum command_identify_by command_idby = CIB_NONE;
45c7212c	200
9927363c	201	if (argc <= 1 && idby != II_NONE)
5e75fd04	202	return 1;
45c7212c	203
bd396f2a	204	switch (idby) {
9927363c JB	205	case II_PHY_IDX:
	206	command_idby = CIB_PHY;
	207	devidx = strtoul(*argv + 4, &tmp, 0);
	208	if (*tmp != '\0')
	209	return 1;
	210	argc--;
	211	argv++;
	212	break;
	213	case II_PHY_NAME:
	214	command_idby = CIB_PHY;
bd396f2a JB	215	devidx = phy_lookup(*argv);
	216	argc--;
	217	argv++;
	218	break;
9927363c JB	219	case II_NETDEV:
9927363c JB	220	command_idby = CIB_NETDEV;
bd396f2a	221	devidx = if_nametoindex(*argv);
989e97c2 JB	222	if (devidx == 0)
989e97c2 JB	223	devidx = -1;
bd396f2a JB	224	argc--;
	225	argv++;
	226	break;
	227	default:
	228	break;
	229	}
	230
989e97c2 JB	231	if (devidx < 0)
	232	return -errno;
	233
bd396f2a JB	234	section = command = *argv;
	235	argc--;
	236	argv++;
	237
403b9c83 JB	238	for (cmd = &__start___cmd; cmd < &__stop___cmd;
	239	cmd = (struct cmd )((char )cmd + cmd_size)) {
	240	if (!cmd->handler)
	241	continue;
9927363c	242	if (cmd->idby != command_idby)
bd396f2a JB	243	continue;
	244	if (cmd->section) {
	245	if (strcmp(cmd->section, section))
	246	continue;
	247	/* this is a bit icky ... */
	248	if (command == section) {
	249	if (argc <= 0)
5e75fd04	250	return 1;
bd396f2a JB	251	command = *argv;
	252	argc--;
	253	argv++;
	254	}
	255	} else if (section != command)
	256	continue;
	257	if (strcmp(cmd->name, command))
	258	continue;
	259	if (argc && !cmd->args)
	260	continue;
	261	break;
	262	}
45c7212c	263
74701031	264	if (cmd >= &__stop___cmd)
5e75fd04	265	return 1;
45c7212c	266
bd396f2a JB	267	msg = nlmsg_alloc();
bd396f2a JB	268	if (!msg) {
70391ccf JB	269	fprintf(stderr, "failed to allocate netlink message\n");
	270	return 2;
	271	}
	272
59c49f09	273	cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
70391ccf JB	274	if (!cb) {
	275	fprintf(stderr, "failed to allocate netlink callbacks\n");
	276	err = 2;
	277	goto out_free_msg;
bd396f2a	278	}
45c7212c	279
bd396f2a JB	280	genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0,
	281	cmd->nl_msg_flags, cmd->cmd, 0);
	282
9927363c	283	switch (command_idby) {
bd396f2a JB	284	case CIB_PHY:
	285	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
	286	break;
	287	case CIB_NETDEV:
	288	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
	289	break;
	290	default:
	291	break;
	292	}
	293
70391ccf JB	294	err = cmd->handler(cb, msg, argc, argv);
	295	if (err)
	296	goto out;
	297
57077d64	298	err = nl_send_auto_complete(state->nl_sock, msg);
70391ccf JB	299	if (err < 0)
	300	goto out;
	301
c5c4471a JB	302	err = 1;
c5c4471a JB	303
70391ccf	304	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
59c418c0	305	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
561c5b7e	306	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
70391ccf	307
c5c4471a	308	while (err > 0)
57077d64	309	nl_recvmsgs(state->nl_sock, cb);
70391ccf JB	310	out:
	311	nl_cb_put(cb);
	312	out_free_msg:
	313	nlmsg_free(msg);
	314	return err;
bd396f2a JB	315	nla_put_failure:
bd396f2a JB	316	fprintf(stderr, "building message failed\n");
70391ccf	317	return 2;
45c7212c JB	318	}
45c7212c JB	319
2c61ba61 JB	320	static int no_seq_check(struct nl_msg msg, void arg)
	321	{
	322	return NL_OK;
	323	}
	324
	325	static int print_event(struct nl_msg msg, void arg)
	326	{
	327	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	328	struct nlattr *tb[NL80211_ATTR_MAX + 1];
99f46802	329	char ifname[100];
601c6ab2	330	__u8 reg_type;
2c61ba61 JB	331
	332	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	333	genlmsg_attrlen(gnlh, 0), NULL);
	334
	335	switch (gnlh->cmd) {
03109dcb	336	case NL80211_CMD_NEW_WIPHY:
2c61ba61 JB	337	printf("wiphy rename: phy #%d to %s\n",
	338	nla_get_u32(tb[NL80211_ATTR_WIPHY]),
	339	nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
	340	break;
99f46802 JB	341	case NL80211_CMD_NEW_SCAN_RESULTS:
	342	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	343	printf("scan finished on %s (phy #%d)\n",
	344	ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	345	break;
	346	case NL80211_CMD_SCAN_ABORTED:
	347	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	348	printf("scan aborted on %s (phy #%d)\n",
	349	ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	350	break;
601c6ab2 LR	351	case NL80211_CMD_REG_CHANGE:
	352
	353	printf("regulatory domain change: ");
	354
	355	reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);
	356
	357	switch (reg_type) {
	358	case NL80211_REGDOM_TYPE_COUNTRY:
	359	printf("set to %s by %s request",
	360	nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
	361	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	362	if (tb[NL80211_ATTR_WIPHY])
	363	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	364	break;
	365	case NL80211_REGDOM_TYPE_WORLD:
	366	printf("set to world roaming by %s request",
	367	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	368	break;
	369	case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
	370	printf("custom world roaming rules in place on phy%d by %s request",
	371	nla_get_u32(tb[NL80211_ATTR_WIPHY]),
	372	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	373	break;
	374	case NL80211_REGDOM_TYPE_INTERSECTION:
	375	printf("intersection used due to a request made by %s",
	376	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	377	if (tb[NL80211_ATTR_WIPHY])
	378	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	379	break;
	380	default:
	381	printf("unknown source (upgrade this utility)");
	382	break;
	383	}
	384
	385	printf("\n");
	386	break;
03109dcb JB	387	default:
	388	printf("unknown event: %d\n", gnlh->cmd);
	389	break;
2c61ba61 JB	390	}
	391
	392	return NL_SKIP;
	393	}
	394
	395	static int listen_events(struct nl80211_state *state,
	396	int argc, char **argv)
	397	{
	398	int mcid, ret;
	399	struct nl_cb *cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
	400
	401	if (!cb) {
	402	fprintf(stderr, "failed to allocate netlink callbacks\n");
	403	return -ENOMEM;
	404	}
	405
601c6ab2	406	/* Configuration multicast group */
57077d64	407	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
2c61ba61 JB	408	if (mcid < 0)
	409	return mcid;
	410
57077d64	411	ret = nl_socket_add_membership(state->nl_sock, mcid);
2c61ba61 JB	412	if (ret)
2c61ba61 JB	413	return ret;
99f46802	414
601c6ab2	415	/* Scan multicast group */
99f46802	416	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
5406d9e4 JB	417	if (mcid >= 0) {
	418	ret = nl_socket_add_membership(state->nl_sock, mcid);
	419	if (ret)
	420	return ret;
	421	}
99f46802	422
601c6ab2 LR	423	/* Regulatory multicast group */
	424	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
	425	if (mcid >= 0) {
	426	ret = nl_socket_add_membership(state->nl_sock, mcid);
	427	if (ret)
	428	return ret;
	429	}
	430
2c61ba61 JB	431	/* no sequence checking for multicast messages */
	432	nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
	433	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, NULL);
	434
	435	while (1)
57077d64	436	nl_recvmsgs(state->nl_sock, cb);
2c61ba61 JB	437
	438	nl_cb_put(cb);
	439
	440	return 0;
	441	}
	442
cad53b3f JB	443	int main(int argc, char **argv)
	444	{
	445	struct nl80211_state nlstate;
bd396f2a JB	446	int err;
bd396f2a JB	447	const char *argv0;
cad53b3f	448
f408e01b	449	/* calculate command size including padding */
ce5af55c JB	450	cmd_size = abs((long)&__cmd_NULL_1_CIB_NONE_0
ce5af55c JB	451	- (long)&__cmd_NULL_0_CIB_NONE_0);
45c7212c JB	452	/* strip off self */
45c7212c JB	453	argc--;
1cdd9016 MK	454	argv0 = *argv++;
1cdd9016 MK	455
59c49f09 JB	456	if (argc > 0 && strcmp(*argv, "--debug") == 0) {
	457	debug = 1;
	458	argc--;
	459	argv++;
	460	}
	461
d711f013 JB	462	if (argc > 0 && strcmp(*argv, "--version") == 0) {
	463	version();
	464	return 0;
	465	}
	466
bd396f2a	467	if (argc == 0 \|\| strcmp(*argv, "help") == 0) {
1cdd9016	468	usage(argv0);
4a972f80	469	return 0;
1cdd9016	470	}
45c7212c	471
2bdb6bd1 JB	472	err = nl80211_init(&nlstate);
	473	if (err)
	474	return 1;
	475
2c61ba61 JB	476	if (strcmp(*argv, "event") == 0) {
	477	err = listen_events(&nlstate, argc, argv);
	478	} else if (strcmp(*argv, "dev") == 0) {
14a0380d LR	479	argc--;
14a0380d LR	480	argv++;
9927363c JB	481	err = handle_cmd(&nlstate, II_NETDEV, argc, argv);
	482	} else if (strncmp(*argv, "phy", 3) == 0) {
	483	if (strlen(*argv) == 3) {
	484	argc--;
	485	argv++;
	486	err = handle_cmd(&nlstate, II_PHY_NAME, argc, argv);
	487	} else if ((argv + 3) == '#')
	488	err = handle_cmd(&nlstate, II_PHY_IDX, argc, argv);
	489	else
	490	err = 1;
bd396f2a	491	} else
9927363c	492	err = handle_cmd(&nlstate, II_NONE, argc, argv);
45c7212c	493
5e75fd04	494	if (err == 1)
bd396f2a	495	usage(argv0);
5e75fd04	496	if (err < 0)
b49be3e1	497	fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);
cad53b3f JB	498
	499	nl80211_cleanup(&nlstate);
	500
45c7212c	501	return err;
cad53b3f	502	}