NAME

       dns_ip4 - look up IPv4 addresses

SYNTAX

       #include <libowfat/dns.h>

       int dns_ip4(stralloc* out,stralloc* fqdn);

DESCRIPTION

       dns_ip4  looks up 4-byte IP addresses for the fully-qualified domain name in fqdn. It 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.

       If  dns_ip4  has trouble with the DNS lookup or runs out of memory, it returns -1, setting
       errno appropriately. It may or may not change out.

       If fqdn is a dotted-decimal IP address, dns_ip4 puts that  IP  address  into  out  without
       checking  DNS.  More  generally,  if fqdn is a dot-separated sequence of dotted-decimal IP
       addresses, dns_ip4 puts those IP addresses into out without  checking  DNS.  Brackets  may
       appear inside the dotted-decimal IP addresses; they are ignored.

SEE ALSO

       dns_ip4_packet(3), dns_ip6(3), dns_name4(3)

                                                                                       dns_ip4(3)