dns_ip6_qualify man page on Alpinelinux

dns_ip6_qualify man page on Alpinelinux

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dns_ip6_qualify(3)					    dns_ip6_qualify(3)

NAME
       dns_ip6_qualify - qualify name and look up IPv6 addresses

SYNTAX
       #include <dns.h>

       int dns_ip6_qualify(stralloc* out,stralloc* fqdn,
			   const stralloc* udn);

DESCRIPTION
       dns_ip6_qualify	feeds  the name udn through qualification and looks up
       16-byte IPv6 addresses for the result.  It  puts	 the  fully  qualified
       domain  name into fqdn, puts the concatenation of the IP addresses into
       out, and returns 0. If the domain does not exist in DNS, or has	no  IP
       addresses, out will be empty.

       dns_ip6_qualify	also  looks up 4-byte IPv4 addresses and converts them
       into IPv4-mapped IPv6 addresses (::ffff:1.2.3.4) to provide easy	 back‐
       wards compatibility for IPv6 applications.

       If dns_ip6_qualify has trouble with the qualification, has trouble with
       DNS, or runs out of memory, it returns -1, setting errno appropriately.
       It may or may not change out and fqdn.

QUALIFICATION
       See http://cr.yp.to/djbdns/qualification.html

SEE ALSO
       dns_ip6(3), dns_ip6_packet(3), dns_ip4_qualify(3)

							    dns_ip6_qualify(3)

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