Minor adjustments in utp_discv5_protocol (#459)

- Move SocketConfig parameter location
- Reuse rng from disc5 protocol
- add exports
- Some whitespace clean-up

eth/utp/utp_discv5_protocol.nim

@@ -13,7 +13,7 @@ import
   ./utp_router,
   ../keys
 
-export utp_router
+export utp_router, protocol
 
 type UtpDiscv5Protocol* = ref object of TalkProtocol
   prot: protocol.Protocol
@@ -66,16 +66,15 @@ proc new*(
     p: protocol.Protocol,
     subProtocolName: seq[byte],
     acceptConnectionCb: AcceptConnectionCallback[Node],
-    socketConfig: SocketConfig = SocketConfig.init(),
     allowConnectionCb: AllowConnectionCallback[Node] = nil,
-    rng = newRng()): UtpDiscv5Protocol =
+    socketConfig: SocketConfig = SocketConfig.init()): UtpDiscv5Protocol =
   doAssert(not(isNil(acceptConnectionCb)))
 
   let router = UtpRouter[Node].new(
     acceptConnectionCb,
     allowConnectionCb,
     socketConfig,
-    rng
+    p.rng
   )
   router.sendCb = initSendCallback(p, subProtocolName)
 

eth/utp/utp_router.nim

@@ -113,8 +113,8 @@ proc new*[A](
     rng = newRng()): UtpRouter[A] =
   UtpRouter[A].new(acceptConnectionCb, nil, socketConfig, rng)
 
-# There are different possiblites how connection was established, and we need to 
-# check every case
+# There are different possibilities on how the connection got established, need
+# to check every case.
 proc getSocketOnReset[A](r: UtpRouter[A], sender: A, id: uint16): Option[UtpSocket[A]] =
   # id is our recv id
   let recvKey = UtpSocketKey[A].init(sender, id)

tests/utp/test_discv5_protocol.nim

@@ -145,14 +145,14 @@ procSuite "Utp protocol over discovery v5 tests":
         node1,
         utpProtId,
         registerIncomingSocketCallback(queue),
-        SocketConfig.init(lowSynTimeout))
+        socketConfig = SocketConfig.init(lowSynTimeout))
       utp2 =
         UtpDiscv5Protocol.new(
           node2,
           utpProtId,
           registerIncomingSocketCallback(queue),
-          SocketConfig.init(),
-          allowOneIdCallback(allowedId))
+          allowOneIdCallback(allowedId),
+          SocketConfig.init())
 
     # nodes must know about each other
     check:
@@ -191,7 +191,7 @@ procSuite "Utp protocol over discovery v5 tests":
         node2,
         utpProtId,
         registerIncomingSocketCallback(queue),
-        SocketConfig.init(incomingSocketReceiveTimeout = none[Duration]())
+        socketConfig = SocketConfig.init(incomingSocketReceiveTimeout = none[Duration]())
       )
 
     # nodes must know about each other