Method AddInterfaceAddr

pkg/sentry/socket/netstack/stack.go:653–682

AddInterfaceAddr implements inet.Stack.AddInterfaceAddr.

(idx int32, addr inet.InterfaceAddr)

// AddInterfaceAddr implements inet.Stack.AddInterfaceAddr.
func (s *Stack) AddInterfaceAddr(idx int32, addr inet.InterfaceAddr) error {
	protocolAddress, err := convertAddr(addr)
	if err != nil {
		return err
	}

	// Attach address to interface.
	nicID := tcpip.NICID(idx)
	if err := s.Stack.AddProtocolAddress(nicID, protocolAddress, stack.AddressProperties{}); err != nil {
		return syserr.TranslateNetstackError(err).ToError()
	}

	// Add route for local network if it doesn't exist already.
	localRoute := tcpip.Route{
		Destination: protocolAddress.AddressWithPrefix.Subnet(),
		Gateway:     tcpip.Address{}, // No gateway for local network.
		NIC:         nicID,
	}

	for _, rt := range s.Stack.GetRouteTable() {
		if rt.Equal(localRoute) {
			return nil
		}
	}

	// Local route does not exist yet. Add it.
	s.Stack.AddRoute(localRoute)

	return nil
}

// RemoveInterfaceAddr implements inet.Stack.RemoveInterfaceAddr.
func (s *Stack) RemoveInterfaceAddr(idx int32, addr inet.InterfaceAddr) error {