ibss.c

#ifndef _POSIX_SOURCE
#define _POSIX_SOURCE
#endif
#include <errno.h>
#include <string.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"

SECTION(ibss);

static int join_ibss(struct nl80211_state *state,
		     struct nl_cb *cb,
		     struct nl_msg *msg,
		     int argc, char **argv)
{
	char *end;
	unsigned char abssid[6];
	unsigned char rates[NL80211_MAX_SUPP_RATES];
	int n_rates = 0;
	char *value = NULL, *sptr = NULL;
	float rate;

	if (argc < 2)
		return 1;

	/* SSID */
	NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
	argv++;
	argc--;

	/* freq */
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ,
		    strtoul(argv[0], &end, 10));
	if (*end != '\0')
		return 1;
	argv++;
	argc--;

	if (argc && strcmp(argv[0], "fixed-freq") == 0) {
		NLA_PUT_FLAG(msg, NL80211_ATTR_FREQ_FIXED);
		argv++;
		argc--;
	}

	if (argc) {
		if (mac_addr_a2n(abssid, argv[0]) == 0) {
			NLA_PUT(msg, NL80211_ATTR_MAC, 6, abssid);
			argv++;
			argc--;
		}
	}

	/* basic rates */
	if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
		argv++;
		argc--;

		value = strtok_r(argv[0], ",", &sptr);

		while (value && n_rates < NL80211_MAX_SUPP_RATES) {
			rate = strtod(value, &end);
			rates[n_rates] = rate * 2;

			/* filter out suspicious values  */
			if (*end != '\0' || !rates[n_rates] ||
			    rate*2 != rates[n_rates])
				return 1;

			n_rates++;
			value = strtok_r(NULL, ",", &sptr);
		}

		NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);

		argv++;
		argc--;
	}

	if (!argc)
		return 0;

	if (strcmp(*argv, "key") != 0 && strcmp(*argv, "keys") != 0)
		return 1;

	argv++;
	argc--;

	return parse_keys(msg, argv, argc);
 nla_put_failure:
	return -ENOSPC;
}

static int leave_ibss(struct nl80211_state *state,
		      struct nl_cb *cb,
		      struct nl_msg *msg,
		      int argc, char **argv)
{
	return 0;
}
COMMAND(ibss, leave, NULL,
	NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
	"Leave the current IBSS cell.");
COMMAND(ibss, join,
	"<SSID> <freq in MHz> [fixed-freq] [<fixed bssid>] "
	"[basic-rates <rate in Mbps,rate2,...>] [key d:0:abcde]",
	NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,
	"Join the IBSS cell with the given SSID, if it doesn't exist create\n"
	"it on the given frequency. When fixed frequency is requested, don't\n"
	"join/create a cell on a different frequency. When a fixed BSSID is\n"
	"requested use that BSSID and do not adopt another cell's BSSID even\n"
	"if it has higher TSF and the same SSID.");