man dns_name6_domain () - construct host name for reverse lookup
NAME
dns_name6_domain - construct host name for reverse lookup
SYNTAX
#include <dns.h>
void dns_name6_domain(char q[DNS_NAME6_DOMAIN], const char* ip[16],int type);
DESCRIPTION
dns_name6_domain is a low-level component of dns_name6. It converts an IP address such as 4321:0:1:2:3:4:567:89ab into a domain name such as b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.IP6.INT and places the packet-encoded domain name into q.
type can be DNS_IP6_INT or DNS_IP6_ARPA. The "ip6.int" domain for IPv6 reverse lookups is now deprecated and "ip6.arpa" is the standard way.
q is zero terminated.
q must have space for DNS_NAME6_DOMAIN bytes.