Fixing magic numbers

protocols/bgp/server/bmp_router.go

@@ -219,7 +219,7 @@ func (r *router) processPeerUpNotification(msg *bmppkt.PeerUpNotification) error
 		return fmt.Errorf("Received peer up notification for %v: Invalid sent open message: %v", msg.PerPeerHeader.PeerAddress, msg.SentOpenMsg)
 	}
 
-	sentOpen, err := packet.DecodeOpenMsg(bytes.NewBuffer(msg.SentOpenMsg[19:]))
+	sentOpen, err := packet.DecodeOpenMsg(bytes.NewBuffer(msg.SentOpenMsg[packet.HeaderLen:]))
 	if err != nil {
 		return fmt.Errorf("Unable to decode sent open message sent from %v to %v: %v", r.address.String(), msg.PerPeerHeader.PeerAddress, err)
 	}
@@ -228,7 +228,7 @@ func (r *router) processPeerUpNotification(msg *bmppkt.PeerUpNotification) error
 		return fmt.Errorf("Received peer up notification for %v: Invalid received open message: %v", msg.PerPeerHeader.PeerAddress, msg.ReceivedOpenMsg)
 	}
 
-	recvOpen, err := packet.DecodeOpenMsg(bytes.NewBuffer(msg.ReceivedOpenMsg[19:]))
+	recvOpen, err := packet.DecodeOpenMsg(bytes.NewBuffer(msg.ReceivedOpenMsg[packet.HeaderLen:]))
 	if err != nil {
 		return fmt.Errorf("Unable to decode received open message sent from %v to %v: %v", msg.PerPeerHeader.PeerAddress, r.address.String(), err)
 	}