dns_name6 - look up host name

       dns_name6  looks  up  the domain name for the 16-byte IPv6 address in ip. It puts the (first) domain name
       into out and returns 0. If the relevant ip6.arpa domain does not exist in DNS, or has no PTR records, out
       will be empty.

       If dns_name6 has trouble with the DNS lookup or  runs  out  of  memory,  it  returns  -1,  setting  errno
       appropriately. It may or may not change out.

       dns_name6 - look up host name

dns_name_packet(3), dns_name6_domain(3), dns_name4(3), dns_ip6(3)

                                                                                                    dns_name6(3)

#include<libowfat/dns.h>

       int dns_name6(stralloc* out,const char* ip[16]);