src/cidr/cidr_misc.c

/*
 * Misc pieces
 */
#include "config.h"

#include "cidr.h"

static const char *__libcidr_version = CIDR_VERSION_STR;

/* Library version info */
const char *cidr_version(void)
{
	return (__libcidr_version);
}

/* Is a CIDR a v4-mapped IPv6 address? */
int cidr_is_v4mapped(const CIDR * addr)
{
	int i;

	if (addr->proto != CIDR_IPV6)
		return (-1);

	/* First 10 octets should be 0 */
	for (i = 0; i <= 9; i++)
		if (addr->addr[i] != 0)
			return (-1);

	/* Next 2 should be 0xff */
	for (i = 10; i <= 11; i++)
		if (addr->addr[i] != 0xff)
			return (-1);

	/* Then it is */
	return (0);
}