Decorate decorates an Exchanger with the given Decorators.

ErrorLogging returns a Decorator which logs an Exchanger's errors to the given logger.

Instrumentation returns a Decorator which instruments an Exchanger with the given counters.

NewForwarder returns a new Forwarder for the given addrs with the given Exchangers map which maps network protocols to Exchangers.

A ForwardError is returned by Forwarders when they can't forward.

Exchanger is an interface capturing a dns.Client Exchange method.

A Decorator adds a layer of behaviour to a given Exchanger.

A Forwarder is a DNS message forwarder that transparently proxies messages to DNS servers.

Func is a function type that implements the Exchanger interface.