initial commit

[thirdparty/iw.git] / iw.c

/*
 * nl80211 userspace tool
 *
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * GPLv2
 */

#include <errno.h>
#include <stdio.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 <linux/nl80211.h>

#include "iw.h"


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

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

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

	state->nl_cache = genl_ctrl_alloc_cache(state->nl_handle);
	if (!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_handle_destroy(state->nl_handle);
	return err;
}

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

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

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


	nl80211_cleanup(&nlstate);

	return 0;
}