udp: Add AES-based connection ID generation

udp/connection_test.go

@@ -0,0 +1,44 @@
+// Copyright 2015 The Chihaya Authors. All rights reserved.
+// Use of this source code is governed by the BSD 2-Clause license,
+// which can be found in the LICENSE file.
+
+package udp
+
+import (
+	"bytes"
+	"net"
+	"testing"
+)
+
+func TestInitReturnsNoError(t *testing.T) {
+	if err := InitConnectionIDEncryption(); err != nil {
+		t.Error("InitConnectionIDEncryption returned", err)
+	}
+}
+
+func testGenerateConnectionID(t *testing.T, ip net.IP) {
+	InitConnectionIDEncryption()
+
+	id1 := GenerateConnectionID(ip)
+	id2 := GenerateConnectionID(ip)
+
+	if !bytes.Equal(id1, id2) {
+		t.Errorf("Connection ID mismatch: %x != %x", id1, id2)
+	}
+
+	if len(id1) != 8 {
+		t.Errorf("Connection ID had length: %d != 8", len(id1))
+	}
+
+	if bytes.Count(id1, []byte{0}) == 8 {
+		t.Errorf("Connection ID was 0")
+	}
+}
+
+func TestGenerateConnectionIDIPv4(t *testing.T) {
+	testGenerateConnectionID(t, net.ParseIP("192.168.1.123").To4())
+}
+
+func TestGenerateConnectionIDIPv6(t *testing.T) {
+	testGenerateConnectionID(t, net.ParseIP("1:2:3:4::5:6"))
+}