func cmdAdd(args *skel.CmdArgs) error { n, err := loadNetConf(args.StdinData) if err != nil { return err } br, err := setupBridge(n) if err != nil { return err } if err = setupVeth(args.Netns, br, args.IfName, n.MTU, n.HairpinMode); err != nil { return err } // run the IPAM plugin and get back the config to apply result, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData) if err != nil { return err } if result.IP4 == nil { return errors.New("IPAM plugin returned missing IPv4 config") } if result.IP4.Gateway == nil && n.IsGW { result.IP4.Gateway = calcGatewayIP(&result.IP4.IP) } err = ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error { return ipam.ConfigureIface(args.IfName, result) }) if err != nil { return err } if n.IsGW { gwn := &net.IPNet{ IP: result.IP4.Gateway, Mask: result.IP4.IP.Mask, } if err = ensureBridgeAddr(br, gwn); err != nil { return err } if err := ip.EnableIP4Forward(); err != nil { return fmt.Errorf("failed to enable forwarding: %v", err) } } if n.IPMasq { chain := utils.FormatChainName(n.Name, args.ContainerID) comment := utils.FormatComment(n.Name, args.ContainerID) if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain, comment); err != nil { return err } } result.DNS = n.DNS return result.Print() }
func cmdAdd(args *skel.CmdArgs) error { n, err := loadNetConf(args.StdinData) if err != nil { return err } if n.IsDefaultGW { n.IsGW = true } br, err := setupBridge(n) if err != nil { return err } netns, err := ns.GetNS(args.Netns) if err != nil { return fmt.Errorf("failed to open netns %q: %v", args.Netns, err) } defer netns.Close() if err = setupVeth(netns, br, args.IfName, n.MTU, n.HairpinMode); err != nil { return err } // run the IPAM plugin and get back the config to apply result, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData) if err != nil { return err } // TODO: make this optional when IPv6 is supported if result.IP4 == nil { return errors.New("IPAM plugin returned missing IPv4 config") } if result.IP4.Gateway == nil && n.IsGW { result.IP4.Gateway = calcGatewayIP(&result.IP4.IP) } if err := netns.Do(func(_ ns.NetNS) error { // set the default gateway if requested if n.IsDefaultGW { _, defaultNet, err := net.ParseCIDR("0.0.0.0/0") if err != nil { return err } for _, route := range result.IP4.Routes { if defaultNet.String() == route.Dst.String() { if route.GW != nil && !route.GW.Equal(result.IP4.Gateway) { return fmt.Errorf( "isDefaultGateway ineffective because IPAM sets default route via %q", route.GW, ) } } } result.IP4.Routes = append( result.IP4.Routes, types.Route{Dst: *defaultNet, GW: result.IP4.Gateway}, ) // TODO: IPV6 } if err := ipam.ConfigureIface(args.IfName, result); err != nil { return err } if err := ip.SetHWAddrByIP(args.IfName, result.IP4.IP.IP, nil /* TODO IPv6 */); err != nil { return err } return nil }); err != nil { return err } if n.IsGW { gwn := &net.IPNet{ IP: result.IP4.Gateway, Mask: result.IP4.IP.Mask, } if err = ensureBridgeAddr(br, gwn, n.ForceAddress); err != nil { return err } if err := ip.SetHWAddrByIP(n.BrName, gwn.IP, nil /* TODO IPv6 */); err != nil { return err } if err := ip.EnableIP4Forward(); err != nil { return fmt.Errorf("failed to enable forwarding: %v", err) } } if n.IPMasq { chain := utils.FormatChainName(n.Name, args.ContainerID) comment := utils.FormatComment(n.Name, args.ContainerID) if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain, comment); err != nil { return err } } result.DNS = n.DNS return result.Print() }