Method CreateStack

runsc/boot/loader.go:1792–1816

CreateStack implements kernel.NetworkStackCreator.CreateStack.

()

// CreateStack implements kernel.NetworkStackCreator.CreateStack.
func (c *sandboxNetstackCreator) CreateStack() (inet.Stack, error) {
	s, err := c.newEmptySandboxNetworkStack()
	if err != nil {
		return nil, err
	}

	// Setup loopback.
	n := &Network{Stack: s.Stack}
	nicID := s.Stack.NextNICID()
	if nicID != linux.LOOPBACK_IFINDEX {
		return nil, fmt.Errorf("loopback device should always have index %d, got %d", linux.LOOPBACK_IFINDEX, nicID)
	}
	link := DefaultLoopbackLink
	linkEP := ethernet.New(loopback.New())
	opts := stack.NICOptions{
		Name:               link.Name,
		DeliverLinkPackets: true,
	}

	if err := n.createNICWithAddrs(nicID, linkEP, opts, link.Addresses); err != nil {
		return nil, err
	}

	return s, nil
}

// signal sends a signal to one or more processes in a container. If PID is 0,
// then the container init process is used. Depending on the SignalDeliveryMode