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Golang ip.IP4Net类代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了Golang中github.com/coreos/rudder/pkg/ip.IP4Net的典型用法代码示例。如果您正苦于以下问题:Golang IP4Net类的具体用法?Golang IP4Net怎么用?Golang IP4Net使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。



在下文中一共展示了IP4Net类的5个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: Run

func Run(sm *subnet.SubnetManager, tepIface *net.Interface, tepIP net.IP, port int, ipMasq bool, ready backend.ReadyFunc) {
	sn, err := acquireLease(sm, tepIP)
	if err != nil {
		log.Error("Failed to acquire lease: ", err)
		return
	}

	tun, tunName, err := ip.OpenTun("rudder%d")
	if err != nil {
		log.Error("Failed to open TUN device: ", err)
		return
	}

	localAddr := net.UDPAddr{
		Port: port,
	}

	conn, err := net.ListenUDP("udp4", &localAddr)
	if err != nil {
		log.Error("Failed to start listening on UDP socket: ", err)
		return
	}

	// Interface's subnet is that of the whole overlay network (e.g. /16)
	// and not that of the individual host (e.g. /24)
	tunNet := ip.IP4Net{
		IP:        sn.IP,
		PrefixLen: sm.GetConfig().Network.PrefixLen,
	}

	// TUN MTU will be smaller b/c of encap (IP+UDP hdrs)
	var mtu int
	if tepIface.MTU > 0 {
		mtu = tepIface.MTU - encapOverhead
	} else {
		log.Errorf("Failed to determine MTU for %s interface", tepIP)
		return
	}

	err = configureIface(tunName, tunNet, mtu)
	if err != nil {
		return
	}

	if ipMasq {
		err = setupIpMasq(tunNet.Network(), tunName)
		if err != nil {
			return
		}
	}

	// all initialized and ready for business
	log.Info("UDP encapsulation initialized")
	ready(sn, mtu)

	fastProxy(sm, tun, conn, tunNet.IP, uint(mtu), port)
}
开发者ID:RubanDeventhiran,项目名称:rudder,代码行数:57,代码来源:run.go


示例2: allocateSubnet

func (sm *SubnetManager) allocateSubnet() (ip.IP4Net, error) {
	log.Infof("Picking subnet in range %s ... %s", sm.config.SubnetMin, sm.config.SubnetMax)

	var bag []ip.IP4
	sn := ip.IP4Net{IP: sm.config.SubnetMin, PrefixLen: sm.config.SubnetLen}

OuterLoop:
	for ; sn.IP <= sm.config.SubnetMax && len(bag) < 100; sn = sn.Next() {
		for _, l := range sm.leases {
			if sn.Overlaps(l.Network) {
				continue OuterLoop
			}
		}
		bag = append(bag, sn.IP)
	}

	if len(bag) == 0 {
		return ip.IP4Net{}, errors.New("out of subnets")
	} else {
		i := randInt(0, len(bag))
		return ip.IP4Net{IP: bag[i], PrefixLen: sm.config.SubnetLen}, nil
	}
}
开发者ID:is00hcw,项目名称:rudder,代码行数:23,代码来源:subnet.go


示例3: setupIpMasq

func setupIpMasq(ipn ip.IP4Net, iface string) error {
	ipt, err := ip.NewIPTables()
	if err != nil {
		log.Error("Failed to setup IP Masquerade. iptables was not found")
		return err
	}

	err = ipt.ClearChain("nat", "RUDDER")
	if err != nil {
		log.Error("Failed to create/clear RUDDER chain in NAT table: ", err)
		return err
	}

	rules := [][]string{
		// This rule makes sure we don't NAT traffic within overlay network (e.g. coming out of docker0)
		[]string{"RUDDER", "-d", ipn.String(), "-j", "ACCEPT"},
		// This rule makes sure we don't NAT multicast traffic within overlay network
		[]string{"RUDDER", "-d", "224.0.0.0/4", "-j", "ACCEPT"},
		// This rule will NAT everything originating from our overlay network and
		[]string{"RUDDER", "!", "-o", iface, "-j", "MASQUERADE"},
		// This rule will take everything coming from overlay and sent it to RUDDER chain
		[]string{"POSTROUTING", "-s", ipn.String(), "-j", "RUDDER"},
	}

	for _, args := range rules {
		log.Info("Adding iptables rule: ", strings.Join(args, " "))

		err = ipt.AppendUnique("nat", args...)
		if err != nil {
			log.Error("Failed to insert IP masquerade rule: ", err)
			return err
		}
	}

	return nil
}
开发者ID:RubanDeventhiran,项目名称:rudder,代码行数:36,代码来源:run.go


示例4: writeSubnet

func writeSubnet(sn ip.IP4Net, mtu int) error {
	// Write out the first usable IP by incrementing
	// sn.IP by one
	sn.IP += 1

	dir, _ := path.Split(opts.subnetFile)
	os.MkdirAll(dir, 0755)

	f, err := os.Create(opts.subnetFile)
	if err != nil {
		return err
	}
	defer f.Close()

	fmt.Fprintf(f, "RUDDER_SUBNET=%s\n", sn)
	fmt.Fprintf(f, "RUDDER_MTU=%d\n", mtu)
	return nil
}
开发者ID:RubanDeventhiran,项目名称:rudder,代码行数:18,代码来源:main.go


示例5: configureIface

func configureIface(ifname string, ipn ip.IP4Net, mtu int) error {
	iface, err := net.InterfaceByName(ifname)
	if err != nil {
		log.Error("Failed to lookup interface ", ifname)
		return err
	}

	n := ipn.ToIPNet()
	err = netlink.NetworkLinkAddIp(iface, n.IP, n)
	if err != nil {
		log.Errorf("Failed to add IP address %s to %s: %s", n.IP, ifname, err)
		return err
	}

	err = netlink.NetworkSetMTU(iface, mtu)
	if err != nil {
		log.Errorf("Failed to set MTU for %s: %v", ifname, err)
		return err
	}

	err = netlink.NetworkLinkUp(iface)
	if err != nil {
		log.Errorf("Failed to set interface %s to UP state: %s", ifname, err)
		return err
	}

	// explicitly add a route since there might be a route for a subnet already
	// installed by Docker and then it won't get auto added
	err = netlink.AddRoute(ipn.Network().String(), "", "", ifname)
	if err != nil && err != syscall.EEXIST {
		log.Errorf("Failed to add route (%s -> %s): %v", ipn.Network().String(), ifname, err)
		return err
	}

	return nil
}
开发者ID:RubanDeventhiran,项目名称:rudder,代码行数:36,代码来源:run.go



注:本文中的github.com/coreos/rudder/pkg/ip.IP4Net类示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。


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