dns_handler

type DefaultHandler struct {
	// Logger is used for logging. A nil value will disable logging.
	Logger *zap.Logger

	// Entry is the entry ExecutablePlugin's tag. This cannot be nil.
	Entry executable_seq.ExecutableCmd

	// ConcurrentLimit controls the max concurrent queries for the DefaultHandler.
	// If ConcurrentLimit <= 0, means no limit.
	// When calling DefaultHandler.ServeDNS(), if a query exceeds the limit, it will wait on a FIFO queue until
	// - its ctx is done -> The query will be dropped silently.
	// - it can be proceeded -> Normal procedure.
	ConcurrentLimit int
	// contains filtered or unexported fields
}

type DummyServerHandler struct {
	T       *testing.T
	WantMsg *dns.Msg
	WantErr error
}

type Handler interface {
	// ServeDNS uses ctx to control deadline, exchanges qCtx, and writes response to w.
	ServeDNS(ctx context.Context, qCtx *handler.Context, w ResponseWriter)
}

type ResponseWriter interface {
	Write(m *dns.Msg) (n int, err error)
}