[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 <stdbool.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"

/* libnl 1.x compatibility code */
#if !defined(CONFIG_LIBNL20) && !defined(CONFIG_LIBNL30)
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);
}
#endif /* CONFIG_LIBNL20 && CONFIG_LIBNL30 */

int iw_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;
	}

	state->nl80211_id = genl_ctrl_resolve(state->nl_sock, "nl80211");
	if (state->nl80211_id < 0) {
		fprintf(stderr, "nl80211 not found.\n");
		err = -ENOENT;
		goto out_handle_destroy;
	}

	return 0;

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

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

static int cmd_size;

extern struct cmd __start___cmd;
extern struct cmd __stop___cmd;

#define for_each_cmd(_cmd)					\
	for (_cmd = &__start___cmd; _cmd < &__stop___cmd;		\
	     _cmd = (const struct cmd *)((char *)_cmd + cmd_size))


static void __usage_cmd(const struct cmd *cmd, char *indent, bool full)
{
	const char *start, *lend, *end;

	printf("%s", indent);

	switch (cmd->idby) {
	case CIB_NONE:
		break;
	case CIB_PHY:
		printf("phy <phyname> ");
		break;
	case CIB_NETDEV:
		printf("dev <devname> ");
		break;
	case CIB_WDEV:
		printf("wdev <idx> ");
		break;
	}
	if (cmd->parent && cmd->parent->name)
		printf("%s ", cmd->parent->name);
	printf("%s", cmd->name);

	if (cmd->args) {
		/* print line by line */
		start = cmd->args;
		end = strchr(start, '\0');
		printf(" ");
		do {
			lend = strchr(start, '\n');
			if (!lend)
				lend = end;
			if (start != cmd->args) {
				printf("\t");
				switch (cmd->idby) {
				case CIB_NONE:
					break;
				case CIB_PHY:
					printf("phy <phyname> ");
					break;
				case CIB_NETDEV:
					printf("dev <devname> ");
					break;
				case CIB_WDEV:
					printf("wdev <idx> ");
					break;
				}
				if (cmd->parent && cmd->parent->name)
					printf("%s ", cmd->parent->name);
				printf("%s ", cmd->name);
			}
			printf("%.*s\n", (int)(lend - start), start);
			start = lend + 1;
		} while (end != lend);
	} else
		printf("\n");

	if (!full || !cmd->help)
		return;

	/* hack */
	if (strlen(indent))
		indent = "\t\t";
	else
		printf("\n");

	/* print line by line */
	start = cmd->help;
	end = strchr(start, '\0');
	do {
		lend = strchr(start, '\n');
		if (!lend)
			lend = end;
		printf("%s", indent);
		printf("%.*s\n", (int)(lend - start), start);
		start = lend + 1;
	} while (end != lend);

	printf("\n");
}

static void usage_options(void)
{
	printf("Options:\n");
	printf("\t--debug\t\tenable netlink debugging\n");
}

static const char *argv0;

static void usage(int argc, char **argv)
{
	const struct cmd *section, *cmd;
	bool full = argc >= 0;
	const char *sect_filt = NULL;
	const char *cmd_filt = NULL;

	if (argc > 0)
		sect_filt = argv[0];

	if (argc > 1)
		cmd_filt = argv[1];

	printf("Usage:\t%s [options] command\n", argv0);
	usage_options();
	printf("\t--version\tshow version (%s)\n", iw_version);
	printf("Commands:\n");
	for_each_cmd(section) {
		if (section->parent)
			continue;

		if (sect_filt && strcmp(section->name, sect_filt))
			continue;

		if (section->handler && !section->hidden)
			__usage_cmd(section, "\t", full);

		for_each_cmd(cmd) {
			if (section != cmd->parent)
				continue;
			if (!cmd->handler || cmd->hidden)
				continue;
			if (cmd_filt && strcmp(cmd->name, cmd_filt))
				continue;
			__usage_cmd(cmd, "\t", full);
		}
	}
	printf("\nCommands that use the netdev ('dev') can also be given the\n"
	       "'wdev' instead to identify the device.\n");
	printf("\nYou can omit the 'phy' or 'dev' if "
			"the identification is unique,\n"
			"e.g. \"iw wlan0 info\" or \"iw phy0 info\". "
			"(Don't when scripting.)\n\n"
			"Do NOT screenscrape this tool, we don't "
			"consider its output stable.\n\n");
}

static int print_help(struct nl80211_state *state,
		      struct nl_cb *cb,
		      struct nl_msg *msg,
		      int argc, char **argv,
		      enum id_input id)
{
	exit(3);
}
TOPLEVEL(help, "[command]", 0, 0, CIB_NONE, print_help,
	 "Print usage for all or a specific command, e.g.\n"
	 "\"help wowlan\" or \"help wowlan enable\".");

static void usage_cmd(const struct cmd *cmd)
{
	printf("Usage:\t%s [options] ", argv0);
	__usage_cmd(cmd, "", true);
	usage_options();
}

static void version(void)
{
	printf("iw version %s\n", iw_version);
}

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) {
		close(fd);
		return -1;
	}
	buf[pos] = '\0';
	close(fd);
	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 id_input idby,
			int argc, char **argv, const struct cmd **cmdout)
{
	const struct cmd *cmd, *match = NULL, *sectcmd;
	struct nl_cb *cb;
	struct nl_cb *s_cb;
	struct nl_msg *msg;
	signed long long devidx = 0;
	int err, o_argc;
	const char *command, *section;
	char *tmp, **o_argv;
	enum command_identify_by command_idby = CIB_NONE;

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

	o_argc = argc;
	o_argv = argv;

	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;
	case II_WDEV:
		command_idby = CIB_WDEV;
		devidx = strtoll(*argv, &tmp, 0);
		if (*tmp != '\0')
			return 1;
		argc--;
		argv++;
	default:
		break;
	}

	if (devidx < 0)
		return -errno;

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

	for_each_cmd(sectcmd) {
		if (sectcmd->parent)
			continue;
		/* ok ... bit of a hack for the dupe 'info' section */
		if (match && sectcmd->idby != command_idby)
			continue;
		if (strcmp(sectcmd->name, section) == 0)
			match = sectcmd;
	}

	sectcmd = match;
	match = NULL;
	if (!sectcmd)
		return 1;

	if (argc > 0) {
		command = *argv;

		for_each_cmd(cmd) {
			if (!cmd->handler)
				continue;
			if (cmd->parent != sectcmd)
				continue;
			/*
			 * ignore mismatch id by, but allow WDEV
			 * in place of NETDEV
			 */
			if (cmd->idby != command_idby &&
			    !(cmd->idby == CIB_NETDEV &&
			      command_idby == CIB_WDEV))
				continue;
			if (strcmp(cmd->name, command))
				continue;
			if (argc > 1 && !cmd->args)
				continue;
			match = cmd;
			break;
		}

		if (match) {
			argc--;
			argv++;
		}
	}

	if (match)
		cmd = match;
	else {
		/* Use the section itself, if possible. */
		cmd = sectcmd;
		if (argc && !cmd->args)
			return 1;
		if (cmd->idby != command_idby &&
		    !(cmd->idby == CIB_NETDEV && command_idby == CIB_WDEV))
			return 1;
		if (!cmd->handler)
			return 1;
	}

	if (cmd->selector) {
		cmd = cmd->selector(argc, argv);
		if (!cmd)
			return 1;
	}

	if (cmdout)
		*cmdout = cmd;

	if (!cmd->cmd) {
		argc = o_argc;
		argv = o_argv;
		return cmd->handler(state, NULL, NULL, argc, argv, idby);
	}

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

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

	genlmsg_put(msg, 0, 0, state->nl80211_id, 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;
	case CIB_WDEV:
		NLA_PUT_U64(msg, NL80211_ATTR_WDEV, devidx);
		break;
	default:
		break;
	}

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

	nl_socket_set_cb(state->nl_sock, s_cb);

	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;
}

int handle_cmd(struct nl80211_state *state, enum id_input idby,
	       int argc, char **argv)
{
	return __handle_cmd(state, idby, argc, argv, NULL);
}

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

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

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

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

	/* need to treat "help" command specially so it works w/o nl80211 */
	if (argc == 0 || strcmp(*argv, "help") == 0) {
		usage(argc - 1, argv + 1);
		return 0;
	}

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

	if (strcmp(*argv, "dev") == 0 && argc > 1) {
		argc--;
		argv++;
		err = __handle_cmd(&nlstate, II_NETDEV, argc, argv, &cmd);
	} else if (strncmp(*argv, "phy", 3) == 0 && argc > 1) {
		if (strlen(*argv) == 3) {
			argc--;
			argv++;
			err = __handle_cmd(&nlstate, II_PHY_NAME, argc, argv, &cmd);
		} else if (*(*argv + 3) == '#')
			err = __handle_cmd(&nlstate, II_PHY_IDX, argc, argv, &cmd);
		else
			goto detect;
	} else if (strcmp(*argv, "wdev") == 0 && argc > 1) {
		argc--;
		argv++;
		err = __handle_cmd(&nlstate, II_WDEV, argc, argv, &cmd);
	} else {
		int idx;
		enum id_input idby = II_NONE;
 detect:
		if ((idx = if_nametoindex(argv[0])) != 0)
			idby = II_NETDEV;
		else if ((idx = phy_lookup(argv[0])) >= 0)
			idby = II_PHY_NAME;
		err = __handle_cmd(&nlstate, idby, argc, argv, &cmd);
	}

	if (err == 1) {
		if (cmd)
			usage_cmd(cmd);
		else
			usage(0, NULL);
	} else 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>
27c49ed6	15	#include <stdbool.h>
c551449a	16
cad53b3f JB	17	#include <netlink/genl/genl.h>
cad53b3f JB	18	#include <netlink/genl/family.h>
c551449a	19	#include <netlink/genl/ctrl.h>
cad53b3f JB	20	#include <netlink/msg.h>
cad53b3f JB	21	#include <netlink/attr.h>
cad53b3f	22
f408e01b	23	#include "nl80211.h"
cad53b3f JB	24	#include "iw.h"
cad53b3f JB	25
ded667b0 YY	26	/* libnl 1.x compatibility code */
ded667b0 YY	27	#if !defined(CONFIG_LIBNL20) && !defined(CONFIG_LIBNL30)
dfd13ee5 PE	28	static inline struct nl_handle *nl_socket_alloc(void)
	29	{
	30	return nl_handle_alloc();
	31	}
	32
57077d64	33	static inline void nl_socket_free(struct nl_sock *h)
dfd13ee5 PE	34	{
	35	nl_handle_destroy(h);
	36	}
ded667b0	37	#endif /* CONFIG_LIBNL20 && CONFIG_LIBNL30 */
dfd13ee5	38
957a0f07	39	int iw_debug = 0;
cad53b3f JB	40
	41	static int nl80211_init(struct nl80211_state *state)
	42	{
	43	int err;
	44
57077d64 PE	45	state->nl_sock = nl_socket_alloc();
	46	if (!state->nl_sock) {
	47	fprintf(stderr, "Failed to allocate netlink socket.\n");
cad53b3f JB	48	return -ENOMEM;
	49	}
	50
57077d64	51	if (genl_connect(state->nl_sock)) {
cad53b3f JB	52	fprintf(stderr, "Failed to connect to generic netlink.\n");
	53	err = -ENOLINK;
	54	goto out_handle_destroy;
	55	}
	56
f09cee6d JB	57	state->nl80211_id = genl_ctrl_resolve(state->nl_sock, "nl80211");
f09cee6d JB	58	if (state->nl80211_id < 0) {
cad53b3f JB	59	fprintf(stderr, "nl80211 not found.\n");
cad53b3f JB	60	err = -ENOENT;
f09cee6d	61	goto out_handle_destroy;
cad53b3f JB	62	}
	63
	64	return 0;
	65
cad53b3f	66	out_handle_destroy:
57077d64	67	nl_socket_free(state->nl_sock);
cad53b3f JB	68	return err;
	69	}
	70
	71	static void nl80211_cleanup(struct nl80211_state *state)
	72	{
57077d64	73	nl_socket_free(state->nl_sock);
cad53b3f JB	74	}
cad53b3f JB	75
403b9c83 JB	76	static int cmd_size;
403b9c83 JB	77
4698bfc2 JB	78	extern struct cmd __start___cmd;
	79	extern struct cmd __stop___cmd;
	80
	81	#define for_each_cmd(_cmd) \
	82	for (_cmd = &__start___cmd; _cmd < &__stop___cmd; \
	83	_cmd = (const struct cmd )((char )_cmd + cmd_size))
	84
	85
	86	static void __usage_cmd(const struct cmd cmd, char indent, bool full)
3bb116da	87	{
01ae06f9 JB	88	const char start, lend, *end;
01ae06f9 JB	89
bd663893	90	printf("%s", indent);
4f0cae73	91
3bb116da JB	92	switch (cmd->idby) {
3bb116da JB	93	case CIB_NONE:
3bb116da JB	94	break;
3bb116da JB	95	case CIB_PHY:
bd663893	96	printf("phy <phyname> ");
3bb116da JB	97	break;
3bb116da JB	98	case CIB_NETDEV:
bd663893	99	printf("dev <devname> ");
3bb116da	100	break;
290a3dd4 JB	101	case CIB_WDEV:
	102	printf("wdev <idx> ");
	103	break;
3bb116da	104	}
4698bfc2 JB	105	if (cmd->parent && cmd->parent->name)
4698bfc2 JB	106	printf("%s ", cmd->parent->name);
bd663893	107	printf("%s", cmd->name);
eb795501 JB	108
	109	if (cmd->args) {
	110	/* print line by line */
	111	start = cmd->args;
	112	end = strchr(start, '\0');
	113	printf(" ");
	114	do {
	115	lend = strchr(start, '\n');
	116	if (!lend)
	117	lend = end;
	118	if (start != cmd->args) {
	119	printf("\t");
	120	switch (cmd->idby) {
	121	case CIB_NONE:
	122	break;
	123	case CIB_PHY:
	124	printf("phy <phyname> ");
	125	break;
	126	case CIB_NETDEV:
	127	printf("dev <devname> ");
	128	break;
	129	case CIB_WDEV:
	130	printf("wdev <idx> ");
	131	break;
	132	}
	133	if (cmd->parent && cmd->parent->name)
	134	printf("%s ", cmd->parent->name);
	135	printf("%s ", cmd->name);
	136	}
	137	printf("%.*s\n", (int)(lend - start), start);
	138	start = lend + 1;
	139	} while (end != lend);
	140	} else
	141	printf("\n");
01ae06f9 JB	142
	143	if (!full \|\| !cmd->help)
	144	return;
	145
	146	/* hack */
	147	if (strlen(indent))
	148	indent = "\t\t";
	149	else
bd663893	150	printf("\n");
01ae06f9 JB	151
	152	/* print line by line */
	153	start = cmd->help;
	154	end = strchr(start, '\0');
	155	do {
	156	lend = strchr(start, '\n');
	157	if (!lend)
	158	lend = end;
bd663893 HS	159	printf("%s", indent);
bd663893 HS	160	printf("%.*s\n", (int)(lend - start), start);
01ae06f9 JB	161	start = lend + 1;
	162	} while (end != lend);
	163
bd663893	164	printf("\n");
3bb116da JB	165	}
3bb116da JB	166
4f0cae73 JB	167	static void usage_options(void)
4f0cae73 JB	168	{
bd663893 HS	169	printf("Options:\n");
bd663893 HS	170	printf("\t--debug\t\tenable netlink debugging\n");
4f0cae73 JB	171	}
4f0cae73 JB	172
01ae06f9 JB	173	static const char *argv0;
01ae06f9 JB	174
f3ac8bf1	175	static void usage(int argc, char **argv)
bd396f2a	176	{
4698bfc2	177	const struct cmd section, cmd;
f3ac8bf1 JB	178	bool full = argc >= 0;
	179	const char *sect_filt = NULL;
	180	const char *cmd_filt = NULL;
	181
	182	if (argc > 0)
	183	sect_filt = argv[0];
	184
	185	if (argc > 1)
	186	cmd_filt = argv[1];
bd396f2a	187
bd663893	188	printf("Usage:\t%s [options] command\n", argv0);
4f0cae73	189	usage_options();
bd663893 HS	190	printf("\t--version\tshow version (%s)\n", iw_version);
bd663893 HS	191	printf("Commands:\n");
4698bfc2 JB	192	for_each_cmd(section) {
4698bfc2 JB	193	if (section->parent)
403b9c83	194	continue;
4698bfc2	195
f3ac8bf1 JB	196	if (sect_filt && strcmp(section->name, sect_filt))
	197	continue;
	198
4698bfc2 JB	199	if (section->handler && !section->hidden)
	200	__usage_cmd(section, "\t", full);
	201
	202	for_each_cmd(cmd) {
	203	if (section != cmd->parent)
	204	continue;
	205	if (!cmd->handler \|\| cmd->hidden)
	206	continue;
f3ac8bf1 JB	207	if (cmd_filt && strcmp(cmd->name, cmd_filt))
f3ac8bf1 JB	208	continue;
4698bfc2 JB	209	__usage_cmd(cmd, "\t", full);
4698bfc2 JB	210	}
bd396f2a	211	}
75f4204c JB	212	printf("\nCommands that use the netdev ('dev') can also be given the\n"
75f4204c JB	213	"'wdev' instead to identify the device.\n");
bd663893	214	printf("\nYou can omit the 'phy' or 'dev' if "
f4ec76d0	215	"the identification is unique,\n"
8aefee9a	216	"e.g. \"iw wlan0 info\" or \"iw phy0 info\". "
fbdb8d05 JB	217	"(Don't when scripting.)\n\n"
	218	"Do NOT screenscrape this tool, we don't "
	219	"consider its output stable.\n\n");
bd396f2a JB	220	}
bd396f2a JB	221
01ae06f9 JB	222	static int print_help(struct nl80211_state *state,
	223	struct nl_cb *cb,
	224	struct nl_msg *msg,
05514f95 JB	225	int argc, char **argv,
05514f95 JB	226	enum id_input id)
01ae06f9 JB	227	{
	228	exit(3);
	229	}
f3ac8bf1 JB	230	TOPLEVEL(help, "[command]", 0, 0, CIB_NONE, print_help,
	231	"Print usage for all or a specific command, e.g.\n"
	232	"\"help wowlan\" or \"help wowlan enable\".");
01ae06f9	233
4698bfc2	234	static void usage_cmd(const struct cmd *cmd)
4f0cae73	235	{
bd663893	236	printf("Usage:\t%s [options] ", argv0);
01ae06f9	237	__usage_cmd(cmd, "", true);
4f0cae73 JB	238	usage_options();
	239	}
	240
d711f013 JB	241	static void version(void)
d711f013 JB	242	{
133b069f	243	printf("iw version %s\n", iw_version);
d711f013 JB	244	}
d711f013 JB	245
bd396f2a JB	246	static int phy_lookup(char *name)
	247	{
	248	char buf[200];
	249	int fd, pos;
	250
	251	snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", name);
	252
	253	fd = open(buf, O_RDONLY);
989e97c2 JB	254	if (fd < 0)
989e97c2 JB	255	return -1;
bd396f2a	256	pos = read(fd, buf, sizeof(buf) - 1);
8f253ee2 ES	257	if (pos < 0) {
8f253ee2 ES	258	close(fd);
bd396f2a	259	return -1;
8f253ee2	260	}
bd396f2a	261	buf[pos] = '\0';
8f253ee2	262	close(fd);
bd396f2a JB	263	return atoi(buf);
	264	}
	265
70391ccf JB	266	static int error_handler(struct sockaddr_nl nla, struct nlmsgerr err,
	267	void *arg)
	268	{
	269	int *ret = arg;
	270	*ret = err->error;
	271	return NL_STOP;
	272	}
	273
561c5b7e JB	274	static int finish_handler(struct nl_msg msg, void arg)
561c5b7e JB	275	{
59c418c0 JB	276	int *ret = arg;
59c418c0 JB	277	*ret = 0;
561c5b7e JB	278	return NL_SKIP;
	279	}
	280
	281	static int ack_handler(struct nl_msg msg, void arg)
70391ccf JB	282	{
	283	int *ret = arg;
	284	*ret = 0;
	285	return NL_STOP;
	286	}
	287
4f0cae73	288	static int __handle_cmd(struct nl80211_state *state, enum id_input idby,
4698bfc2	289	int argc, char argv, const struct cmd cmdout)
45c7212c	290	{
4698bfc2	291	const struct cmd cmd, match = NULL, *sectcmd;
7c37a24d	292	struct nl_cb *cb;
5cb60f91	293	struct nl_cb *s_cb;
bd396f2a	294	struct nl_msg *msg;
290a3dd4	295	signed long long devidx = 0;
bb60b4ae	296	int err, o_argc;
bd396f2a	297	const char command, section;
bb60b4ae	298	char tmp, *o_argv;
9927363c	299	enum command_identify_by command_idby = CIB_NONE;
45c7212c	300
9927363c	301	if (argc <= 1 && idby != II_NONE)
5e75fd04	302	return 1;
45c7212c	303
bb60b4ae JB	304	o_argc = argc;
	305	o_argv = argv;
	306
bd396f2a	307	switch (idby) {
9927363c JB	308	case II_PHY_IDX:
	309	command_idby = CIB_PHY;
	310	devidx = strtoul(*argv + 4, &tmp, 0);
	311	if (*tmp != '\0')
	312	return 1;
	313	argc--;
	314	argv++;
	315	break;
	316	case II_PHY_NAME:
	317	command_idby = CIB_PHY;
bd396f2a JB	318	devidx = phy_lookup(*argv);
	319	argc--;
	320	argv++;
	321	break;
9927363c JB	322	case II_NETDEV:
9927363c JB	323	command_idby = CIB_NETDEV;
bd396f2a	324	devidx = if_nametoindex(*argv);
989e97c2 JB	325	if (devidx == 0)
989e97c2 JB	326	devidx = -1;
bd396f2a JB	327	argc--;
	328	argv++;
	329	break;
290a3dd4 JB	330	case II_WDEV:
	331	command_idby = CIB_WDEV;
	332	devidx = strtoll(*argv, &tmp, 0);
	333	if (*tmp != '\0')
	334	return 1;
	335	argc--;
	336	argv++;
bd396f2a JB	337	default:
	338	break;
	339	}
	340
989e97c2 JB	341	if (devidx < 0)
	342	return -errno;
	343
4698bfc2	344	section = *argv;
bd396f2a JB	345	argc--;
	346	argv++;
	347
4698bfc2 JB	348	for_each_cmd(sectcmd) {
4698bfc2 JB	349	if (sectcmd->parent)
403b9c83	350	continue;
4698bfc2 JB	351	/* ok ... bit of a hack for the dupe 'info' section */
4698bfc2 JB	352	if (match && sectcmd->idby != command_idby)
bd396f2a	353	continue;
4698bfc2 JB	354	if (strcmp(sectcmd->name, section) == 0)
4698bfc2 JB	355	match = sectcmd;
bd396f2a	356	}
45c7212c	357
4698bfc2 JB	358	sectcmd = match;
	359	match = NULL;
	360	if (!sectcmd)
5e75fd04	361	return 1;
45c7212c	362
4698bfc2 JB	363	if (argc > 0) {
	364	command = *argv;
	365
	366	for_each_cmd(cmd) {
	367	if (!cmd->handler)
	368	continue;
	369	if (cmd->parent != sectcmd)
	370	continue;
75f4204c JB	371	/*
	372	* ignore mismatch id by, but allow WDEV
	373	* in place of NETDEV
	374	*/
	375	if (cmd->idby != command_idby &&
	376	!(cmd->idby == CIB_NETDEV &&
	377	command_idby == CIB_WDEV))
4698bfc2 JB	378	continue;
	379	if (strcmp(cmd->name, command))
	380	continue;
	381	if (argc > 1 && !cmd->args)
	382	continue;
	383	match = cmd;
	384	break;
	385	}
	386
	387	if (match) {
	388	argc--;
	389	argv++;
	390	}
	391	}
	392
	393	if (match)
	394	cmd = match;
	395	else {
	396	/* Use the section itself, if possible. */
	397	cmd = sectcmd;
	398	if (argc && !cmd->args)
	399	return 1;
75f4204c JB	400	if (cmd->idby != command_idby &&
75f4204c JB	401	!(cmd->idby == CIB_NETDEV && command_idby == CIB_WDEV))
4698bfc2 JB	402	return 1;
	403	if (!cmd->handler)
	404	return 1;
	405	}
	406
1633ddf7 JB	407	if (cmd->selector) {
	408	cmd = cmd->selector(argc, argv);
	409	if (!cmd)
	410	return 1;
	411	}
	412
4f0cae73 JB	413	if (cmdout)
	414	*cmdout = cmd;
	415
bb60b4ae JB	416	if (!cmd->cmd) {
	417	argc = o_argc;
	418	argv = o_argv;
05514f95	419	return cmd->handler(state, NULL, NULL, argc, argv, idby);
bb60b4ae JB	420	}
bb60b4ae JB	421
bd396f2a JB	422	msg = nlmsg_alloc();
bd396f2a JB	423	if (!msg) {
70391ccf JB	424	fprintf(stderr, "failed to allocate netlink message\n");
	425	return 2;
	426	}
	427
957a0f07	428	cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
5cb60f91 SR	429	s_cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
5cb60f91 SR	430	if (!cb \|\| !s_cb) {
70391ccf JB	431	fprintf(stderr, "failed to allocate netlink callbacks\n");
	432	err = 2;
	433	goto out_free_msg;
bd396f2a	434	}
45c7212c	435
f09cee6d	436	genlmsg_put(msg, 0, 0, state->nl80211_id, 0,
bd396f2a JB	437	cmd->nl_msg_flags, cmd->cmd, 0);
bd396f2a JB	438
9927363c	439	switch (command_idby) {
bd396f2a JB	440	case CIB_PHY:
	441	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
	442	break;
	443	case CIB_NETDEV:
	444	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
	445	break;
290a3dd4 JB	446	case CIB_WDEV:
	447	NLA_PUT_U64(msg, NL80211_ATTR_WDEV, devidx);
	448	break;
bd396f2a JB	449	default:
	450	break;
	451	}
	452
05514f95	453	err = cmd->handler(state, cb, msg, argc, argv, idby);
70391ccf JB	454	if (err)
	455	goto out;
	456
5cb60f91 SR	457	nl_socket_set_cb(state->nl_sock, s_cb);
5cb60f91 SR	458
57077d64	459	err = nl_send_auto_complete(state->nl_sock, msg);
70391ccf JB	460	if (err < 0)
	461	goto out;
	462
c5c4471a JB	463	err = 1;
c5c4471a JB	464
70391ccf	465	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
59c418c0	466	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
561c5b7e	467	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
70391ccf	468
c5c4471a	469	while (err > 0)
57077d64	470	nl_recvmsgs(state->nl_sock, cb);
70391ccf JB	471	out:
	472	nl_cb_put(cb);
	473	out_free_msg:
	474	nlmsg_free(msg);
	475	return err;
bd396f2a JB	476	nla_put_failure:
bd396f2a JB	477	fprintf(stderr, "building message failed\n");
70391ccf	478	return 2;
45c7212c JB	479	}
45c7212c JB	480
4f0cae73 JB	481	int handle_cmd(struct nl80211_state *state, enum id_input idby,
	482	int argc, char **argv)
	483	{
	484	return __handle_cmd(state, idby, argc, argv, NULL);
	485	}
	486
cad53b3f JB	487	int main(int argc, char **argv)
	488	{
	489	struct nl80211_state nlstate;
bd396f2a	490	int err;
4698bfc2	491	const struct cmd *cmd = NULL;
cad53b3f	492
f408e01b	493	/* calculate command size including padding */
4698bfc2	494	cmd_size = abs((long)&__section_set - (long)&__section_get);
45c7212c JB	495	/* strip off self */
45c7212c JB	496	argc--;
1cdd9016 MK	497	argv0 = *argv++;
1cdd9016 MK	498
59c49f09	499	if (argc > 0 && strcmp(*argv, "--debug") == 0) {
957a0f07	500	iw_debug = 1;
59c49f09 JB	501	argc--;
	502	argv++;
	503	}
	504
d711f013 JB	505	if (argc > 0 && strcmp(*argv, "--version") == 0) {
	506	version();
	507	return 0;
	508	}
	509
01ae06f9	510	/* need to treat "help" command specially so it works w/o nl80211 */
bd396f2a	511	if (argc == 0 \|\| strcmp(*argv, "help") == 0) {
f3ac8bf1	512	usage(argc - 1, argv + 1);
4a972f80	513	return 0;
1cdd9016	514	}
45c7212c	515
2bdb6bd1 JB	516	err = nl80211_init(&nlstate);
	517	if (err)
	518	return 1;
	519
957a0f07	520	if (strcmp(*argv, "dev") == 0 && argc > 1) {
14a0380d LR	521	argc--;
14a0380d LR	522	argv++;
4f0cae73	523	err = __handle_cmd(&nlstate, II_NETDEV, argc, argv, &cmd);
811ec68f	524	} else if (strncmp(*argv, "phy", 3) == 0 && argc > 1) {
9927363c JB	525	if (strlen(*argv) == 3) {
	526	argc--;
	527	argv++;
4f0cae73	528	err = __handle_cmd(&nlstate, II_PHY_NAME, argc, argv, &cmd);
9927363c	529	} else if ((argv + 3) == '#')
4f0cae73	530	err = __handle_cmd(&nlstate, II_PHY_IDX, argc, argv, &cmd);
9927363c	531	else
f4ec76d0	532	goto detect;
290a3dd4 JB	533	} else if (strcmp(*argv, "wdev") == 0 && argc > 1) {
	534	argc--;
	535	argv++;
	536	err = __handle_cmd(&nlstate, II_WDEV, argc, argv, &cmd);
f4ec76d0 JB	537	} else {
	538	int idx;
	539	enum id_input idby = II_NONE;
	540	detect:
	541	if ((idx = if_nametoindex(argv[0])) != 0)
	542	idby = II_NETDEV;
66f8ca45	543	else if ((idx = phy_lookup(argv[0])) >= 0)
f4ec76d0 JB	544	idby = II_PHY_NAME;
	545	err = __handle_cmd(&nlstate, idby, argc, argv, &cmd);
	546	}
45c7212c	547
4f0cae73 JB	548	if (err == 1) {
4f0cae73 JB	549	if (cmd)
01ae06f9	550	usage_cmd(cmd);
4f0cae73	551	else
f3ac8bf1	552	usage(0, NULL);
4f0cae73	553	} else if (err < 0)
b49be3e1	554	fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);
cad53b3f JB	555
	556	nl80211_cleanup(&nlstate);
	557
45c7212c	558	return err;
cad53b3f	559	}