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.TH dns_name6 3
dns_name6 \- look up host name
.B #include <dns.h>
int \fBdns_name6\fP(stralloc* \fIout\fR,const char* \fIip\fR[16]);
dns_name6 looks up the domain name for the 16-byte IPv6 address in \fIip\fR. It
puts the (first) domain name into \fIout\fR and returns 0. If the relevant
ip6.int domain does not exist in DNS, or has no PTR records, \fIout\fR
will be empty.
dns_name6 will try both the new "ip6.arpa" reverse lookup domain and the
old (deprecated) "ip6.int" one.
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 \fIout\fR.
dns_name_packet(3), dns_name6_domain(3), dns_name4(3), dns_ip6(3)