Revert "Add ProtocolStart and GracefulClose P2P protocol messages (XR…

…PLF#3839)" (XRPLF#4850)

This reverts commit 8f89694.

Builds/CMake/RippledCore.cmake

@@ -637,7 +637,6 @@ target_sources (rippled PRIVATE
   src/ripple/overlay/impl/Cluster.cpp
   src/ripple/overlay/impl/ConnectAttempt.cpp
   src/ripple/overlay/impl/Handshake.cpp
-  src/ripple/overlay/impl/InboundHandoff.cpp
   src/ripple/overlay/impl/Message.cpp
   src/ripple/overlay/impl/OverlayImpl.cpp
   src/ripple/overlay/impl/PeerImp.cpp

src/ripple/overlay/Message.h

@@ -100,14 +100,6 @@ class Message : public std::enable_shared_from_this<Message>
         return validatorKey_;
     }
 
-    /** Get the message type from the payload header.
-     * First four bytes are the compression/algorithm flag and the payload size.
-     * Next two bytes are the message type
-     * @return Message type
-     */
-    int
-    getType() const;
-
 private:
     std::vector<uint8_t> buffer_;
     std::vector<uint8_t> bufferCompressed_;
@@ -137,6 +129,15 @@ class Message : public std::enable_shared_from_this<Message>
      */
     void
     compress();
+
+    /** Get the message type from the payload header.
+     * First four bytes are the compression/algorithm flag and the payload size.
+     * Next two bytes are the message type
+     * @param in Payload header pointer
+     * @return Message type
+     */
+    int
+    getType(std::uint8_t const* in) const;
 };
 
 }  // namespace ripple

src/ripple/overlay/Peer.h

@@ -39,7 +39,6 @@ enum class ProtocolFeature {
     ValidatorListPropagation,
     ValidatorList2Propagation,
     LedgerReplay,
-    StartProtocol
 };
 
 /** Represents a peer connection in the overlay. */

src/ripple/overlay/README.md

@@ -365,50 +365,6 @@ transferred between A and B and will not be able to intelligently tamper with th
 message stream between Alice and Bob, although she may be still be able to inject
 delays or terminate the link.
 
-## Peer Connection Sequence
-
-The _PeerImp_ object can be constructed as either an outbound or an inbound peer. 
-The outbound peer is constructed by the _ConnectAttempt_ - the client side of
-the connection. The inbound peer is constructed by the _InboundHandoff_ - 
-the server side of the connection. This differentiation of the peers matters only
-in terms of the object construction. Once constructed, both inbound and outbound
-peer play the same role.
-
-### Outbound Peer
-
-An outbound connection is initiated once a second by 
-the _OverlayImpl::Timer::on_timer()_ method. This method calls 
-_OverlayImpl::autoConnect()_, which in turn calls _OverlayImpl::connect()_ for
-every outbound endpoint generated by _PeerFinder::autoconnect()_. _connect()_
-method constructs _ConnectAttempt_ object. _ConnectAttempt_ attempts to connect
-to the provided endpoint and on a successful connection executes the client side
-of the handshake protocol described above. If the handshake is successful then 
-the outbound _PeerImp_ object is constructed and passed to the overlay manager 
-_OverlayImpl_, which adds the object to the list of peers and children. The latter 
-maintains a list of objects which might be executing an asynchronous operation 
-and therefore have to be stopped on shutdown. The outbound _PeerImp_ sends
-_TMStartProtocol_ message on start to instruct the connected inbound peer that 
-the outbound peer is ready to receive the protocol messages.
-
-### Inbound Peer
-
-Construction of the inbound peer is more involved. A multi protocol-server,
-_ServerImpl_ located in _src/ripple/server_ module, maintains multiple configured 
-listening ports. Each listening port allows for multiple protocols including HTTP, 
-HTTP/S, WebSocket, Secure WebSocket, and the Peer protocol. For simplicity this 
-sequence describes only the Peer protocol. _ServerImpl_ constructs 
-_Door_ object for each configured protocol. Each instance of the _Door_ object 
-accepts connections on the configured port. On a successful connection the _Door_ 
-constructs _SSLHTTPPeer_ object since the Peer protocol always uses SSL 
-connection. _SSLHTTPPeer_ executes the SSL handshake. If the handshake is successful 
-then a server handler, _ServerHandlerImpl_ located in _src/ripple/src/impl_, hands off 
-the connection to the _OverlayImpl::onHandoff()_ method. _onHandoff()_ method
-validates the client's HTTP handshake request described above. If the request is
-valid then the _InboundHandoff_ object is constructed. _InboundHandoff_ sends
-HTTP response to the connected client, constructs the inbound _PeerImp_ object,
-and passes it to the overlay manager _OverlayImpl_, which adds the object to 
-the list of peers and children. Once the inbound _PeerImp_ receives 
-_TMStartProtocol_ message, it starts sending the protocol messages.
 
 # Ripple Clustering #