code: func New(size int, mtu uint32, linkAddr tcpip.LinkAddress) (tcpip.LinkEndpointID, *Endpoint) {
  	e := &Endpoint{
  		C:        make(chan PacketInfo, size),
  		mtu:      mtu,
  		linkAddr: linkAddr,
  	}
  
  	return stack.RegisterLinkEndpoint(e), e
  }
docs: // New creates a new channel endpoint.