interface.c - platform/external/iw - Gitiles

 #include <net/if.h>
 #include <errno.h>
 #include <string.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"

 #define VALID_FLAGS	"none:     no special flags\n"\
 			"fcsfail:  show frames with FCS errors\n"\
 			"control:  show control frames\n"\
 			"otherbss: show frames from other BSSes\n"\
 			"cook:     use cooked mode"

 SECTION(interface);

 static char *mntr_flags[NL80211_MNTR_FLAG_MAX + 1] = {
 	"none",
 	"fcsfail",
 	"plcpfail",
 	"control",
 	"otherbss",
 	"cook",
 };

 static int parse_mntr_flags(int *_argc, char ***_argv,
 			    struct nl_msg *msg)
 {
 	struct nl_msg *flags;
 	int err = -ENOBUFS;
 	enum nl80211_mntr_flags flag;
 	int argc = *_argc;
 	char **argv = *_argv;

 	flags = nlmsg_alloc();
 	if (!flags)
 		return -ENOMEM;

 	while (argc) {
 		int ok = 0;
 		for (flag = __NL80211_MNTR_FLAG_INVALID;
 		     flag <= NL80211_MNTR_FLAG_MAX; flag++) {
 			if (strcmp(*argv, mntr_flags[flag]) == 0) {
 				ok = 1;
 				/*
 				 * This shouldn't be adding "flag" if that is
 				 * zero, but due to a problem in the kernel's
 				 * nl80211 code (using NLA_NESTED policy) it
 				 * will reject an empty nested attribute but
 				 * not one that contains an invalid attribute
 				 */
 				NLA_PUT_FLAG(flags, flag);
 				break;
 			}
 		}
 		if (!ok) {
 			err = -EINVAL;
 			goto out;
 		}
 		argc--;
 		argv++;
 	}

 	nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 	err = 0;
  nla_put_failure:
  out:
 	nlmsg_free(flags);

 	*_argc = argc;
 	*_argv = argv;

 	return err;
 }

 /* for help */
 #define IFACE_TYPES "Valid interface types are: managed, ibss, monitor, mesh, wds."

 /* return 0 if ok, internal error otherwise */
 static int get_if_type(int *argc, char ***argv, enum nl80211_iftype *type,
 		       bool need_type)
 {
 	char *tpstr;

 	if (*argc < 1 + !!need_type)
 		return 1;

 	if (need_type && strcmp((*argv)[0], "type"))
 		return 1;

 	tpstr = (*argv)[!!need_type];
 	*argc -= 1 + !!need_type;
 	*argv += 1 + !!need_type;

 	if (strcmp(tpstr, "adhoc") == 0 ||
 	    strcmp(tpstr, "ibss") == 0) {
 		*type = NL80211_IFTYPE_ADHOC;
 		return 0;
 	} else if (strcmp(tpstr, "monitor") == 0) {
 		*type = NL80211_IFTYPE_MONITOR;
 		return 0;
 	} else if (strcmp(tpstr, "master") == 0) {
 		*type = NL80211_IFTYPE_UNSPECIFIED;
 		fprintf(stderr, "See http://wireless.kernel.org/RTFM-AP.\n");
 		return 2;
 	} else if (strcmp(tpstr, "ap") == 0) {
 		*type = NL80211_IFTYPE_UNSPECIFIED;
 		fprintf(stderr, "See http://wireless.kernel.org/RTFM-AP.\n");
 		return 2;
 	} else if (strcmp(tpstr, "__ap") == 0) {
 		*type = NL80211_IFTYPE_AP;
 		return 0;
 	} else if (strcmp(tpstr, "__ap_vlan") == 0) {
 		*type = NL80211_IFTYPE_AP_VLAN;
 		return 0;
 	} else if (strcmp(tpstr, "wds") == 0) {
 		*type = NL80211_IFTYPE_WDS;
 		return 0;
 	} else if (strcmp(tpstr, "managed") == 0 ||
 		   strcmp(tpstr, "mgd") == 0 ||
 		   strcmp(tpstr, "station") == 0) {
 		*type = NL80211_IFTYPE_STATION;
 		return 0;
 	} else if (strcmp(tpstr, "mp") == 0 ||
 		   strcmp(tpstr, "mesh") == 0) {
 		*type = NL80211_IFTYPE_MESH_POINT;
 		return 0;
 	}

 	fprintf(stderr, "invalid interface type %s\n", tpstr);
 	return 2;
 }

 static int parse_4addr_flag(const char *value, struct nl_msg *msg)
 {
 	if (strcmp(value, "on") == 0)
 		NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 1);
 	else if (strcmp(value, "off") == 0)
 		NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 0);
 	else
 		return 1;
 	return 0;

 nla_put_failure:
 	return 1;
 }

 static int handle_interface_add(struct nl80211_state *state,
 				struct nl_cb *cb,
 				struct nl_msg *msg,
 				int argc, char **argv)
 {
 	char *name;
 	char *mesh_id = NULL;
 	enum nl80211_iftype type;
 	int tpset;

 	if (argc < 1)
 		return 1;

 	name = argv[0];
 	argc--;
 	argv++;

 	tpset = get_if_type(&argc, &argv, &type, true);
 	if (tpset)
 		return tpset;

 	if (argc) {
 		if (strcmp(argv[0], "mesh_id") == 0) {
 			argc--;
 			argv++;

 			if (!argc)
 				return 1;
 			mesh_id = argv[0];
 			argc--;
 			argv++;
 		} else if (strcmp(argv[0], "4addr") == 0) {
 			argc--;
 			argv++;
 			if (parse_4addr_flag(argv[0], msg)) {
 				fprintf(stderr, "4addr error\n");
 				return 2;
 			}
 			argc--;
 			argv++;
 		} else if (strcmp(argv[0], "flags") == 0) {
 			argc--;
 			argv++;
 			if (parse_mntr_flags(&argc, &argv, msg)) {
 				fprintf(stderr, "flags error\n");
 				return 2;
 			}
 		} else {
 			return 1;
 		}
 	}

 	if (argc)
 		return 1;

 	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, name);
 	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);
 	if (mesh_id)
 		NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id);

 	return 0;
  nla_put_failure:
 	return -ENOBUFS;
 }
 COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on|off] [flags <flag>*]",
 	NL80211_CMD_NEW_INTERFACE, 0, CIB_PHY, handle_interface_add,
 	"Add a new virtual interface with the given configuration.\n"
 	IFACE_TYPES "\n\n"
 	"The flags are only used for monitor interfaces, valid flags are:\n"
 	VALID_FLAGS "\n\n"
 	"The mesh_id is used only for mesh mode.");
 COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on|off] [flags <flag>*]",
 	NL80211_CMD_NEW_INTERFACE, 0, CIB_NETDEV, handle_interface_add, NULL);

 static int handle_interface_del(struct nl80211_state *state,
 				struct nl_cb *cb,
 				struct nl_msg *msg,
 				int argc, char **argv)
 {
 	return 0;
 }
 TOPLEVEL(del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del,
 	 "Remove this virtual interface");
 HIDDEN(interface, del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del);

 static int print_iface_handler(struct nl_msg *msg, void *arg)
 {
 	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
 	unsigned int *wiphy = arg;
 	const char *indent = "";

 	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 		  genlmsg_attrlen(gnlh, 0), NULL);

 	if (wiphy && tb_msg[NL80211_ATTR_WIPHY]) {
 		unsigned int thiswiphy = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY]);
 		indent = "\t";
 		if (*wiphy != thiswiphy)
 			printf("phy#%d\n", thiswiphy);
 		*wiphy = thiswiphy;
 	}

 	if (tb_msg[NL80211_ATTR_IFNAME])
 		printf("%sInterface %s\n", indent, nla_get_string(tb_msg[NL80211_ATTR_IFNAME]));
 	if (tb_msg[NL80211_ATTR_IFINDEX])
 		printf("%s\tifindex %d\n", indent, nla_get_u32(tb_msg[NL80211_ATTR_IFINDEX]));
 	if (tb_msg[NL80211_ATTR_IFTYPE])
 		printf("%s\ttype %s\n", indent, iftype_name(nla_get_u32(tb_msg[NL80211_ATTR_IFTYPE])));

 	return NL_SKIP;
 }

 static int handle_interface_info(struct nl80211_state *state,
 				 struct nl_cb *cb,
 				 struct nl_msg *msg,
 				 int argc, char **argv)
 {
 	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, NULL);
 	return 0;
 }
 TOPLEVEL(info, NULL, NL80211_CMD_GET_INTERFACE, 0, CIB_NETDEV, handle_interface_info,
 	 "Show information for this interface.");

 static int handle_interface_set(struct nl80211_state *state,
 				struct nl_cb *cb,
 				struct nl_msg *msg,
 				int argc, char **argv)
 {
 	if (!argc)
 		return 1;

 	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_MONITOR);

 	switch (parse_mntr_flags(&argc, &argv, msg)) {
 	case 0:
 		return 0;
 	case -ENOMEM:
 		fprintf(stderr, "failed to allocate flags\n");
 		return 2;
 	case -EINVAL:
 		fprintf(stderr, "unknown flag %s\n", *argv);
 		return 2;
 	default:
 		return 2;
 	}
  nla_put_failure:
 	return -ENOBUFS;
 }
 COMMAND(set, monitor, "<flag>*",
 	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_set,
 	"Set monitor flags. Valid flags are:\n"
 	VALID_FLAGS);

 static int handle_interface_meshid(struct nl80211_state *state,
 				   struct nl_cb *cb,
 				   struct nl_msg *msg,
 				   int argc, char **argv)
 {
 	char *mesh_id = NULL;

 	if (argc != 1)
 		return 1;

 	mesh_id = argv[0];

 	NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id);

 	return 0;
  nla_put_failure:
 	return -ENOBUFS;
 }
 COMMAND(set, meshid, "<meshid>",
 	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_meshid, NULL);

 static unsigned int dev_dump_wiphy;

 static int handle_dev_dump(struct nl80211_state *state,
 			   struct nl_cb *cb,
 			   struct nl_msg *msg,
 			   int argc, char **argv)
 {
 	dev_dump_wiphy = -1;
 	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, &dev_dump_wiphy);
 	return 0;
 }
 TOPLEVEL(dev, NULL, NL80211_CMD_GET_INTERFACE, NLM_F_DUMP, CIB_NONE, handle_dev_dump,
 	 "List all network interfaces for wireless hardware.");

 static int handle_interface_type(struct nl80211_state *state,
 				 struct nl_cb *cb,
 				 struct nl_msg *msg,
 				 int argc, char **argv)
 {
 	enum nl80211_iftype type;
 	int tpset;

 	tpset = get_if_type(&argc, &argv, &type, false);
 	if (tpset)
 		return tpset;

 	if (argc)
 		return 1;

 	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);

 	return 0;
  nla_put_failure:
 	return -ENOBUFS;
 }
 COMMAND(set, type, "<type>",
 	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_type,
 	"Set interface type/mode.\n"
 	IFACE_TYPES);
	#include <net/if.h>
	#include <errno.h>
	#include <string.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"

	#define VALID_FLAGS "none: no special flags\n"\
	"fcsfail: show frames with FCS errors\n"\
	"control: show control frames\n"\
	"otherbss: show frames from other BSSes\n"\
	"cook: use cooked mode"

	SECTION(interface);

	static char *mntr_flags[NL80211_MNTR_FLAG_MAX + 1] = {
	"none",
	"fcsfail",
	"plcpfail",
	"control",
	"otherbss",
	"cook",
	};

	static int parse_mntr_flags(int _argc, char **_argv,
	struct nl_msg *msg)
	{
	struct nl_msg *flags;
	int err = -ENOBUFS;
	enum nl80211_mntr_flags flag;
	int argc = *_argc;
	char *argv = _argv;

	flags = nlmsg_alloc();
	if (!flags)
	return -ENOMEM;

	while (argc) {
	int ok = 0;
	for (flag = __NL80211_MNTR_FLAG_INVALID;
	flag <= NL80211_MNTR_FLAG_MAX; flag++) {
	if (strcmp(*argv, mntr_flags[flag]) == 0) {
	ok = 1;
	/*
	* This shouldn't be adding "flag" if that is
	* zero, but due to a problem in the kernel's
	* nl80211 code (using NLA_NESTED policy) it
	* will reject an empty nested attribute but
	* not one that contains an invalid attribute
	*/
	NLA_PUT_FLAG(flags, flag);
	break;
	}
	}
	if (!ok) {
	err = -EINVAL;
	goto out;
	}
	argc--;
	argv++;
	}

	nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
	err = 0;
	nla_put_failure:
	out:
	nlmsg_free(flags);

	*_argc = argc;
	*_argv = argv;

	return err;
	}

	/* for help */
	#define IFACE_TYPES "Valid interface types are: managed, ibss, monitor, mesh, wds."

	/* return 0 if ok, internal error otherwise */
	static int get_if_type(int argc, char *argv, enum nl80211_iftype type,
	bool need_type)
	{
	char *tpstr;

	if (*argc < 1 + !!need_type)
	return 1;

	if (need_type && strcmp((*argv)[0], "type"))
	return 1;

	tpstr = (*argv)[!!need_type];
	*argc -= 1 + !!need_type;
	*argv += 1 + !!need_type;

	if (strcmp(tpstr, "adhoc") == 0 \|\|
	strcmp(tpstr, "ibss") == 0) {
	*type = NL80211_IFTYPE_ADHOC;
	return 0;
	} else if (strcmp(tpstr, "monitor") == 0) {
	*type = NL80211_IFTYPE_MONITOR;
	return 0;
	} else if (strcmp(tpstr, "master") == 0) {
	*type = NL80211_IFTYPE_UNSPECIFIED;
	fprintf(stderr, "See http://wireless.kernel.org/RTFM-AP.\n");
	return 2;
	} else if (strcmp(tpstr, "ap") == 0) {
	*type = NL80211_IFTYPE_UNSPECIFIED;
	fprintf(stderr, "See http://wireless.kernel.org/RTFM-AP.\n");
	return 2;
	} else if (strcmp(tpstr, "__ap") == 0) {
	*type = NL80211_IFTYPE_AP;
	return 0;
	} else if (strcmp(tpstr, "__ap_vlan") == 0) {
	*type = NL80211_IFTYPE_AP_VLAN;
	return 0;
	} else if (strcmp(tpstr, "wds") == 0) {
	*type = NL80211_IFTYPE_WDS;
	return 0;
	} else if (strcmp(tpstr, "managed") == 0 \|\|
	strcmp(tpstr, "mgd") == 0 \|\|
	strcmp(tpstr, "station") == 0) {
	*type = NL80211_IFTYPE_STATION;
	return 0;
	} else if (strcmp(tpstr, "mp") == 0 \|\|
	strcmp(tpstr, "mesh") == 0) {
	*type = NL80211_IFTYPE_MESH_POINT;
	return 0;
	}

	fprintf(stderr, "invalid interface type %s\n", tpstr);
	return 2;
	}

	static int parse_4addr_flag(const char value, struct nl_msg msg)
	{
	if (strcmp(value, "on") == 0)
	NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 1);
	else if (strcmp(value, "off") == 0)
	NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 0);
	else
	return 1;
	return 0;

	nla_put_failure:
	return 1;
	}

	static int handle_interface_add(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	char *name;
	char *mesh_id = NULL;
	enum nl80211_iftype type;
	int tpset;

	if (argc < 1)
	return 1;

	name = argv[0];
	argc--;
	argv++;

	tpset = get_if_type(&argc, &argv, &type, true);
	if (tpset)
	return tpset;

	if (argc) {
	if (strcmp(argv[0], "mesh_id") == 0) {
	argc--;
	argv++;

	if (!argc)
	return 1;
	mesh_id = argv[0];
	argc--;
	argv++;
	} else if (strcmp(argv[0], "4addr") == 0) {
	argc--;
	argv++;
	if (parse_4addr_flag(argv[0], msg)) {
	fprintf(stderr, "4addr error\n");
	return 2;
	}
	argc--;
	argv++;
	} else if (strcmp(argv[0], "flags") == 0) {
	argc--;
	argv++;
	if (parse_mntr_flags(&argc, &argv, msg)) {
	fprintf(stderr, "flags error\n");
	return 2;
	}
	} else {
	return 1;
	}
	}

	if (argc)
	return 1;

	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, name);
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);
	if (mesh_id)
	NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id);

	return 0;
	nla_put_failure:
	return -ENOBUFS;
	}
	COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on\|off] [flags <flag>*]",
	NL80211_CMD_NEW_INTERFACE, 0, CIB_PHY, handle_interface_add,
	"Add a new virtual interface with the given configuration.\n"
	IFACE_TYPES "\n\n"
	"The flags are only used for monitor interfaces, valid flags are:\n"
	VALID_FLAGS "\n\n"
	"The mesh_id is used only for mesh mode.");
	COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on\|off] [flags <flag>*]",
	NL80211_CMD_NEW_INTERFACE, 0, CIB_NETDEV, handle_interface_add, NULL);

	static int handle_interface_del(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	return 0;
	}
	TOPLEVEL(del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del,
	"Remove this virtual interface");
	HIDDEN(interface, del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del);

	static int print_iface_handler(struct nl_msg msg, void arg)
	{
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
	unsigned int *wiphy = arg;
	const char *indent = "";

	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	genlmsg_attrlen(gnlh, 0), NULL);

	if (wiphy && tb_msg[NL80211_ATTR_WIPHY]) {
	unsigned int thiswiphy = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY]);
	indent = "\t";
	if (*wiphy != thiswiphy)
	printf("phy#%d\n", thiswiphy);
	*wiphy = thiswiphy;
	}

	if (tb_msg[NL80211_ATTR_IFNAME])
	printf("%sInterface %s\n", indent, nla_get_string(tb_msg[NL80211_ATTR_IFNAME]));
	if (tb_msg[NL80211_ATTR_IFINDEX])
	printf("%s\tifindex %d\n", indent, nla_get_u32(tb_msg[NL80211_ATTR_IFINDEX]));
	if (tb_msg[NL80211_ATTR_IFTYPE])
	printf("%s\ttype %s\n", indent, iftype_name(nla_get_u32(tb_msg[NL80211_ATTR_IFTYPE])));

	return NL_SKIP;
	}

	static int handle_interface_info(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, NULL);
	return 0;
	}
	TOPLEVEL(info, NULL, NL80211_CMD_GET_INTERFACE, 0, CIB_NETDEV, handle_interface_info,
	"Show information for this interface.");

	static int handle_interface_set(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	if (!argc)
	return 1;

	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_MONITOR);

	switch (parse_mntr_flags(&argc, &argv, msg)) {
	case 0:
	return 0;
	case -ENOMEM:
	fprintf(stderr, "failed to allocate flags\n");
	return 2;
	case -EINVAL:
	fprintf(stderr, "unknown flag %s\n", *argv);
	return 2;
	default:
	return 2;
	}
	nla_put_failure:
	return -ENOBUFS;
	}
	COMMAND(set, monitor, "<flag>*",
	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_set,
	"Set monitor flags. Valid flags are:\n"
	VALID_FLAGS);

	static int handle_interface_meshid(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	char *mesh_id = NULL;

	if (argc != 1)
	return 1;

	mesh_id = argv[0];

	NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id);

	return 0;
	nla_put_failure:
	return -ENOBUFS;
	}
	COMMAND(set, meshid, "<meshid>",
	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_meshid, NULL);

	static unsigned int dev_dump_wiphy;

	static int handle_dev_dump(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	dev_dump_wiphy = -1;
	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, &dev_dump_wiphy);
	return 0;
	}
	TOPLEVEL(dev, NULL, NL80211_CMD_GET_INTERFACE, NLM_F_DUMP, CIB_NONE, handle_dev_dump,
	"List all network interfaces for wireless hardware.");

	static int handle_interface_type(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	enum nl80211_iftype type;
	int tpset;

	tpset = get_if_type(&argc, &argv, &type, false);
	if (tpset)
	return tpset;

	if (argc)
	return 1;

	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);

	return 0;
	nla_put_failure:
	return -ENOBUFS;
	}
	COMMAND(set, type, "<type>",
	NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_type,
	"Set interface type/mode.\n"
	IFACE_TYPES);