dialer

type Config struct {
	// ContextByteCounting optionally configures context-based
	// byte counting. By default we don't do that.
	//
	// Use WithExperimentByteCounter and WithSessionByteCounter
	// to assign byte counters to a context. The code will use
	// corresponding, private functions to access the configured
	// byte counters and will notify them about I/O events.
	//
	// Bug
	//
	// This implementation cannot properly account for the bytes that are sent by
	// persistent connections, because they stick to the counters set when the
	// connection was established. This typically means we miss the bytes sent and
	// received when submitting a measurement. Such bytes are specifically not
	// seen by the experiment specific byte counter.
	//
	// For this reason, this implementation may be heavily changed/removed.
	ContextByteCounting bool

	// DialSaver is the optional saver for dialing events. If not
	// set, we will not save any dialing event.
	DialSaver *trace.Saver

	// Logger is the optional logger. If not set, there
	// will be no logging from the new dialer.
	Logger Logger

	// ProxyURL is the optional proxy URL.
	ProxyURL *url.URL

	// ReadWriteSaver is like DialSaver but for I/O events.
	ReadWriteSaver *trace.Saver
}

type Dialer interface {
	// DialContext behaves like net.Dialer.DialContext.
	DialContext(ctx context.Context, network, address string) (net.Conn, error)
}

type Logger interface {
	// Debugf formats and emits a debug message.
	Debugf(format string, v ...interface{})

	// Debug emits a debug message.
	Debug(msg string)
}

type Resolver interface {
	// LookupHost behaves like net.Resolver.LookupHost.
	LookupHost(ctx context.Context, hostname string) (addrs []string, err error)
}