code: func (f *Forwarder) HandlePacket(r *stack.Route, id stack.TransportEndpointID, netHeader buffer.View, vv buffer.VectorisedView) bool {
  	f.handler(&ForwarderRequest{
  		stack: f.stack,
  		route: r,
  		id:    id,
  		vv:    vv,
  	})
  
  	return true
  }
docs: // HandlePacket handles all packets.
  //
  // This function is expected to be passed as an argument to the
  // stack.SetTransportProtocolHandler function.