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Asynchronous I/O that doesn’t get in your way, written in D

Function resolveHost

Resolves the given host name/IP address string.

NetworkAddress resolveHost (
  string host,
  std.socket.AddressFamily family = AddressFamily.UNSPEC,
  bool use_dns = true,
  core.time.Duration timeout = max()
) @safe;

NetworkAddress resolveHost (
  string host,
  ushort family,
  bool use_dns = true,
  core.time.Duration timeout = max()
) @safe;

This routine converts a string to a NetworkAddress. If the string is an IP address, no network traffic will be generated and the routine will not block. If it is not, a DNS query will be issued, unless forbidden by the use_dns parameter, in which case the query is guaranteed not to block.


host The string to resolve, either an IP address or a hostname
family The desired address family to return. By default, returns the family that host is in. If a value is specified, this routine will throw if the value found for host doesn't match this parameter.
use_dns Whether to use the DNS if host is not an IP address. If false and host is not an IP, this routine will throw. Defaults to true.
timeout If use_dns is true, the Duration to use as timeout for the DNS lookup.


In case of lookup failure, if family doesn't match host, or if use_dns is false but host is not an IP. See the parameter description for more details.


A valid NetworkAddress matching host.


Sönke Ludwig


© 2012-2016 Sönke Ludwig


Subject to the terms of the MIT license, as written in the included LICENSE.txt file.