util.c

#include "iw.h"

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

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