Relay (#678)

Co-authored-by: Wade Simmons <wsimmons@slack-corp.com>

nebula.proto

@@ -15,7 +15,6 @@ message NebulaMeta {
     HostWhoamiReply = 7;
     PathCheck = 8;
     PathCheckReply = 9;
-
   }
 
   MessageType Type = 1;
@@ -26,6 +25,7 @@ message NebulaMetaDetails {
   uint32 VpnIp = 1;
   repeated Ip4AndPort Ip4AndPorts = 2;
   repeated Ip6AndPort Ip6AndPorts = 4;
+  repeated uint32 RelayVpnIp = 5;
   uint32 counter = 3;
 }
 
@@ -63,3 +63,16 @@ message NebulaHandshakeDetails {
   uint64 Time = 5;
 }
 
+message NebulaControl {
+  enum MessageType {
+    None = 0;
+    CreateRelayRequest = 1;
+    CreateRelayResponse = 2;
+  }
+  MessageType Type = 1;
+
+  uint32 InitiatorRelayIndex = 2;
+  uint32 ResponderRelayIndex = 3;
+  uint32 RelayToIp = 4;
+  uint32 RelayFromIp = 5;
+}