+/* --- Miscellaneous packets --- */
+
+#define MSG_MISC 0x20
+
+#define MISC_NOP 0u /* Do nothing; ignore me */
+#define MISC_PING 1u /* Transport-level ping */
+#define MISC_PONG 2u /* Transport-level ping response */
+#define MISC_EPING 3u /* Encrypted ping */
+#define MISC_EPONG 4u /* Encrypted ping response */
+#define MISC_GREET 5u /* A greeting from a NATed peer */
+