network: broadcast messages, enqueue packets

Drop EnqueueP2PPacket, replace EnqueueHPPacket with EnqueueHPMessage. We use
Enqueue* when we have a specific per-peer message, it makes zero sense
duplicating serialization code for it (unlike Broadcast*).

pkg/network/helper_test.go

@@ -105,26 +105,7 @@ func (p *localPeer) Disconnect(err error) {
 	p.server.unregister <- peerDrop{p, err}
 }
 
-func (p *localPeer) EnqueueMessage(msg *Message) error {
-	b, err := msg.Bytes()
-	if err != nil {
-		return err
-	}
-	return p.EnqueueHPPacket(b)
-}
 func (p *localPeer) BroadcastPacket(_ context.Context, m []byte) error {
-	return p.EnqueueHPPacket(m)
-}
-func (p *localPeer) EnqueueP2PMessage(msg *Message) error {
-	return p.EnqueueMessage(msg)
-}
-func (p *localPeer) EnqueueP2PPacket(m []byte) error {
-	return p.EnqueueHPPacket(m)
-}
-func (p *localPeer) BroadcastHPPacket(_ context.Context, m []byte) error {
-	return p.EnqueueHPPacket(m)
-}
-func (p *localPeer) EnqueueHPPacket(m []byte) error {
 	msg := &Message{}
 	r := io.NewBinReaderFromBuf(m)
 	err := msg.Decode(r)
@@ -133,6 +114,16 @@ func (p *localPeer) EnqueueHPPacket(m []byte) error {
 	}
 	return nil
 }
+func (p *localPeer) EnqueueP2PMessage(msg *Message) error {
+	return p.EnqueueHPMessage(msg)
+}
+func (p *localPeer) BroadcastHPPacket(ctx context.Context, m []byte) error {
+	return p.BroadcastPacket(ctx, m)
+}
+func (p *localPeer) EnqueueHPMessage(msg *Message) error {
+	p.messageHandler(p.t, msg)
+	return nil
+}
 func (p *localPeer) Version() *payload.Version {
 	return p.version
 }
@@ -148,11 +139,11 @@ func (p *localPeer) SendVersion() error {
 	if err != nil {
 		return err
 	}
-	_ = p.EnqueueMessage(m)
+	_ = p.EnqueueHPMessage(m)
 	return nil
 }
 func (p *localPeer) SendVersionAck(m *Message) error {
-	_ = p.EnqueueMessage(m)
+	_ = p.EnqueueHPMessage(m)
 	return nil
 }
 func (p *localPeer) HandleVersionAck() error {

pkg/network/peer.go

@@ -32,24 +32,17 @@ type Peer interface {
 	// queue.
 	BroadcastHPPacket(context.Context, []byte) error
 
-	// EnqueueP2PMessage is a temporary wrapper that sends a message via
-	// EnqueueP2PPacket if there is no error in serializing it.
+	// EnqueueP2PMessage is a blocking packet enqueuer, it doesn't return until
+	// it puts the given message into the queue. It returns an error if the peer
+	// has not yet completed handshaking. This queue is intended to be used for
+	// unicast peer to peer communication that is more important than broadcasts
+	// (handled by BroadcastPacket) but less important than high-priority
+	// messages (handled by EnqueueHPMessage).
 	EnqueueP2PMessage(*Message) error
 
-	// EnqueueP2PPacket is a blocking packet enqueuer, it doesn't return until
-	// it puts the given packet into the queue. It accepts a slice of bytes that
-	// can be shared with other queues (so that message marshalling can be
-	// done once for all peers). It returns an error if the peer has not yet
-	// completed handshaking. This queue is intended to be used for unicast
-	// peer to peer communication that is more important than broadcasts
-	// (handled by BroadcastPacket) but less important than high-priority
-	// messages (handled by EnqueueHPPacket and BroadcastHPPacket).
-	EnqueueP2PPacket([]byte) error
-
-	// EnqueueHPPacket is a blocking high priority packet enqueuer, it
-	// doesn't return until it puts the given packet into the high-priority
+	// EnqueueHPMessage is similar to EnqueueP2PMessage, but uses a high-priority
 	// queue.
-	EnqueueHPPacket([]byte) error
+	EnqueueHPMessage(*Message) error
 	Version() *payload.Version
 	LastBlockIndex() uint32
 	Handshaked() bool

pkg/network/server.go

@@ -748,14 +748,10 @@ func (s *Server) handleInvCmd(p Peer, inv *payload.Inventory) error {
 	}
 	if len(reqHashes) > 0 {
 		msg := NewMessage(CMDGetData, payload.NewInventory(inv.Type, reqHashes))
-		pkt, err := msg.Bytes()
-		if err != nil {
-			return err
-		}
 		if inv.Type == payload.ExtensibleType {
-			return p.EnqueueHPPacket(pkt)
+			return p.EnqueueHPMessage(msg)
 		}
-		return p.EnqueueP2PPacket(pkt)
+		return p.EnqueueP2PMessage(msg)
 	}
 	return nil
 }
@@ -812,13 +808,11 @@ func (s *Server) handleGetDataCmd(p Peer, inv *payload.Inventory) error {
 			}
 		}
 		if msg != nil {
-			pkt, err := msg.Bytes()
-			if err == nil {
-				if inv.Type == payload.ExtensibleType {
-					err = p.EnqueueHPPacket(pkt)
-				} else {
-					err = p.EnqueueP2PPacket(pkt)
-				}
+			var err error
+			if inv.Type == payload.ExtensibleType {
+				err = p.EnqueueHPMessage(msg)
+			} else {
+				err = p.EnqueueP2PMessage(msg)
 			}
 			if err != nil {
 				return err

pkg/network/tcp_peer.go

@@ -132,20 +132,14 @@ func (p *TCPPeer) putMsgIntoQueue(queue chan<- []byte, msg *Message) error {
 	return p.putPacketIntoQueue(queue, b)
 }
 
-// EnqueueP2PPacket implements the Peer interface.
-func (p *TCPPeer) EnqueueP2PPacket(msg []byte) error {
-	return p.putPacketIntoQueue(p.p2pSendQ, msg)
-}
-
 // EnqueueP2PMessage implements the Peer interface.
 func (p *TCPPeer) EnqueueP2PMessage(msg *Message) error {
 	return p.putMsgIntoQueue(p.p2pSendQ, msg)
 }
 
-// EnqueueHPPacket implements the Peer interface. It the peer is not yet
-// handshaked it's a noop.
-func (p *TCPPeer) EnqueueHPPacket(msg []byte) error {
-	return p.putPacketIntoQueue(p.hpSendQ, msg)
+// EnqueueHPMessage implements the Peer interface.
+func (p *TCPPeer) EnqueueHPMessage(msg *Message) error {
+	return p.putMsgIntoQueue(p.hpSendQ, msg)
 }
 
 func (p *TCPPeer) writeMsg(msg *Message) error {