Exemplo n.º 1
0
func setupIPTables(config *NetworkConfiguration, i *bridgeInterface) error {
	// Sanity check.
	if config.EnableIPTables == false {
		return IPTableCfgError(config.BridgeName)
	}

	hairpinMode := !config.EnableUserlandProxy

	addrv4, _, err := netutils.GetIfaceAddr(config.BridgeName)
	if err != nil {
		return fmt.Errorf("Failed to setup IP tables, cannot acquire Interface address: %s", err.Error())
	}
	if err = setupIPTablesInternal(config.BridgeName, addrv4, config.EnableICC, config.EnableIPMasquerade, hairpinMode, true); err != nil {
		return fmt.Errorf("Failed to Setup IP tables: %s", err.Error())
	}

	_, err = iptables.NewChain(DockerChain, config.BridgeName, iptables.Nat, hairpinMode)
	if err != nil {
		return fmt.Errorf("Failed to create NAT chain: %s", err.Error())
	}

	chain, err := iptables.NewChain(DockerChain, config.BridgeName, iptables.Filter, hairpinMode)
	if err != nil {
		return fmt.Errorf("Failed to create FILTER chain: %s", err.Error())
	}

	portMapper.SetIptablesChain(chain)

	return nil
}
func setupIPChains(config *configuration) (*iptables.ChainInfo, *iptables.ChainInfo, error) {
	// Sanity check.
	if config.EnableIPTables == false {
		return nil, nil, fmt.Errorf("Cannot create new chains, EnableIPTable is disabled")
	}

	hairpinMode := !config.EnableUserlandProxy

	natChain, err := iptables.NewChain(DockerChain, iptables.Nat, hairpinMode)
	if err != nil {
		return nil, nil, fmt.Errorf("Failed to create NAT chain: %s", err.Error())
	}
	defer func() {
		if err != nil {
			if err := iptables.RemoveExistingChain(DockerChain, iptables.Nat); err != nil {
				logrus.Warnf("Failed on removing iptables NAT chain on cleanup: %v", err)
			}
		}
	}()

	filterChain, err := iptables.NewChain(DockerChain, iptables.Filter, hairpinMode)
	if err != nil {
		return nil, nil, fmt.Errorf("Failed to create FILTER chain: %s", err.Error())
	}

	return natChain, filterChain, nil
}