Test: fix direct listen fail

test/util.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"context"
+	"net"
+	"time"
+)
+
+func Listen(network, address string) (net.Listener, error) {
+	lc := net.ListenConfig{}
+
+	var lastErr error
+	for i := 0; i < 5; i++ {
+		l, err := lc.Listen(context.Background(), network, address)
+		if err == nil {
+			return l, nil
+		}
+
+		lastErr = err
+		time.Sleep(time.Millisecond * 200)
+	}
+	return nil, lastErr
+}
+
+func ListenPacket(network, address string) (net.PacketConn, error) {
+	var lastErr error
+	for i := 0; i < 5; i++ {
+		l, err := net.ListenPacket(network, address)
+		if err == nil {
+			return l, nil
+		}
+
+		lastErr = err
+		time.Sleep(time.Millisecond * 200)
+	}
+	return nil, lastErr
+}