log the encryption level of sent and received packets

protocol/encryption_level.go

@@ -14,3 +14,15 @@ const (
 	// EncryptionForwardSecure is forward secure
 	EncryptionForwardSecure
 )
+
+func (e EncryptionLevel) String() string {
+	switch e {
+	case EncryptionUnencrypted:
+		return "unencrypted"
+	case EncryptionSecure:
+		return "encrypted (not forward-secure)"
+	case EncryptionForwardSecure:
+		return "forward-secure"
+	}
+	return "unknown"
+}

protocol/encryption_level_test.go

@@ -0,0 +1,15 @@
+package protocol
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Encryption Level", func() {
+	It("has the correct string representation", func() {
+		Expect(EncryptionUnspecified.String()).To(Equal("unknown"))
+		Expect(EncryptionUnencrypted.String()).To(Equal("unencrypted"))
+		Expect(EncryptionSecure.String()).To(Equal("encrypted (not forward-secure)"))
+		Expect(EncryptionForwardSecure.String()).To(Equal("forward-secure"))
+	})
+})