isc_result_t
dns_byaddr_createptrname(isc_netaddr_t *address, isc_boolean_t nibble,
dns_name_t *name)
{
/*
* We dropped bitstring labels, so all lookups will use nibbles.
*/
UNUSED(nibble);
return (dns_byaddr_createptrname2(address,
DNS_BYADDROPT_IPV6INT, name));
}
static isc_result_t
get_reverse(char *reverse, size_t len, char *value, isc_boolean_t strict) {
int r;
isc_result_t result;
isc_netaddr_t addr;
addr.family = AF_INET6;
r = inet_pton(AF_INET6, value, &addr.type.in6);
if (r > 0) {
/* This is a valid IPv6 address. */
dns_fixedname_t fname;
dns_name_t *name;
unsigned int options = 0;
dns_fixedname_init(&fname);
name = dns_fixedname_name(&fname);
result = dns_byaddr_createptrname2(&addr, options, name);
if (result != ISC_R_SUCCESS)
return (result);
dns_name_format(name, reverse, (unsigned int)len);
return (ISC_R_SUCCESS);
} else {
/*
* Not a valid IPv6 address. Assume IPv4.
* If 'strict' is not set, construct the
* in-addr.arpa name by blindly reversing
* octets whether or not they look like integers,
* so that this can be used for RFC2317 names
* and such.
*/
char *p = reverse;
char *end = reverse + len;
if (strict && inet_pton(AF_INET, value, &addr.type.in) != 1)
return (DNS_R_BADDOTTEDQUAD);
result = reverse_octets(value, &p, end);
if (result != ISC_R_SUCCESS)
return (result);
result = append_str(".in-addr.arpa.", 15, &p, end);
if (result != ISC_R_SUCCESS)
return (result);
return (ISC_R_SUCCESS);
}
}