util.c

#include "nl80211.h"
#include "iw.h"

int mac_addr_n2a(char *mac_addr, unsigned char *arg)
{
	int i, l;

	l = 0;
	for (i = 0; i < ETH_ALEN ; i++) {
		if (i == 0) {
			sprintf(mac_addr+l, "%02x", arg[i]);
			l += 2;
		} else {
			sprintf(mac_addr+l, ":%02x", arg[i]);
			l += 3;
		}
	}
	return 0;
}

int mac_addr_a2n(unsigned char *mac_addr, char *arg)
{
	int i;

	for (i = 0; i < ETH_ALEN ; i++) {
		int temp;
		char *cp = strchr(arg, ':');
		if (cp) {
			*cp = 0;
			cp++;
		}
		if (sscanf(arg, "%x", &temp) != 1)
			return -1;
		if (temp < 0 || temp > 255)
			return -1;

		mac_addr[i] = temp;
		if (!cp)
			break;
		arg = cp;
	}
	if (i < ETH_ALEN - 1)
		return -1;

	return 0;
}

static const char *ifmodes[NL80211_IFTYPE_MAX + 1] = {
	"unspecified",
	"IBSS",
	"Station",
	"AP",
	"AP(VLAN)",
	"WDS",
	"Monitor",
	"mesh point"
};

static char modebuf[100];

const char *iftype_name(enum nl80211_iftype iftype)
{
	if (iftype <= NL80211_IFTYPE_MAX)
		return ifmodes[iftype];
	sprintf(modebuf, "Unknown mode (%d)", iftype);
	return modebuf;
}

int ieee80211_channel_to_frequency(int chan)
{
	if (chan < 14)
		return 2407 + chan * 5;

	if (chan == 14)
		return 2484;

	/* FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2) */
	return (chan + 1000) * 5;
}

int ieee80211_frequency_to_channel(int freq)
{
	if (freq == 2484)
		return 14;

	if (freq < 2484)
		return (freq - 2407) / 5;

	/* FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2) */
	return freq/5 - 1000;
}