LookupIP with a host, return ip.

LookupIPv4 with a host, return ipv4 list.

LookupIPv4WithResolver same as LookupIPv4, but with a resolver.

LookupIPv6 with a host, return ipv6 list.

LookupIPv6WithResolver same as LookupIPv6, but with a resolver.

LookupIPWithResolver same as LookupIP, but with a resolver.

ResolveIP with a host, return ip and priority return TypeA.

ResolveIPv4 with a host, return ipv4.

ResolveIPv4ProxyServerHost proxies server host only.

ResolveIPv4WithResolver same as ResolveIPv4, but with a resolver.

ResolveIPv6ProxyServerHost proxies server host only.

ResolveIPv6WithResolver same as ResolveIPv6, but with a resolver.

ResolveIPWithResolver same as ResolveIP, but with a resolver.

ResolveProxyServerHost proxies server host only.

ServeMsg with a dns.Msg, return resolve dns.Msg.

DefaultDNSTimeout defined the default dns request timeout.

DefaultHosts aim to resolve hosts.

DefaultResolver aim to resolve ip.

DisableIPv6 means don't resolve ipv6 host default value is true.

ProxyServerHostResolver resolve ip to proxies server host.