Method ReplaceConfig

pkg/tcpip/stack/stack.go:2090–2120

ReplaceConfig replaces config in the loaded stack.

(st *Stack)

// ReplaceConfig replaces config in the loaded stack.
func (s *Stack) ReplaceConfig(st *Stack) {
	if st == nil {
		panic("stack.Stack cannot be nil when netstack s/r is enabled")
	}

	// Update route table.
	s.SetRouteTable(st.GetRouteTable())

	nics := st.getNICs()

	s.mu.Lock()
	defer s.mu.Unlock()

	// Update iptables and nftables.
	s.tables = st.IPTables()
	s.nftables = st.NFTables()

	// Update NICs.
	s.nics = make(map[tcpip.NICID]*nic)
	s.loopbackNIC = nil
	for id, nic := range nics {
		nic.stack = s
		s.nics[id] = nic
		if nic.IsLoopback() {
			s.loopbackNIC = nic
		} else if s.externalNetworkingDisabled {
			nic.disable()
		}
		_ = s.NextNICID()
	}
}

// Restore restarts the stack after a restore. This must be called after the
// entire system has been restored.