cidr_misc.c

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/*
 * Misc pieces
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#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);
}