FreeBSD Manual Pages
dns_ip6(3) Library Functions Manual dns_ip6(3) NAME dns_ip6 - look up IPv6 addresses SYNTAX #include <libowfat/dns.h> int dns_ip6(stralloc* out,stralloc* fqdn); DESCRIPTION dns_ip6 looks up 16-byte IPv6 addresses for the fully-qualified domain name in fqdn. It puts the concatenation of the IPv6 addresses into out and re- turns 0. If the domain does not exist in DNS, or has no IP addresses, out will be empty. dns_ip6 also looks up 4-byte IPv4 addresses and converts them into IPv4-mapped IPv6 addresses (::ffff:1.2.3.4) to provide easy backwards com- patibility for IPv6 applications. If dns_ip6 has trouble with the DNS lookup or runs out of memory, it re- turns -1, setting errno appropriately. It may or may not change out. If fqdn is an IPv6 address, dns_ip6 puts that IP address into out without checking DNS. IPv4 addresses are also used directly without DNS lookup. SEE ALSO dns_ip6_packet(3), dns_ip4(3), dns_name6(3) dns_ip6(3)
NAME | SYNTAX | DESCRIPTION | SEE ALSO
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=libowfat_dns_ip6&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>