Esempio n. 1
0
func (rb *HostgwBackend) Init(extIface *net.Interface, extIP net.IP, httpPort string, ipMasq bool) (*backend.SubnetDef, error) {
	rb.extIface = extIface
	rb.extIP = extIP

	attrs := subnet.LeaseAttrs{
		PublicIP:    ip.FromIP(extIP),
		BackendType: "host-gw",
		HTTPPort:    httpPort,
	}

	sn, err := rb.sm.AcquireLease(&attrs, rb.stop)
	if err != nil {
		if err == task.ErrCanceled {
			return nil, err
		} else {
			return nil, fmt.Errorf("Failed to acquire lease: %v", err)
		}
	}

	if ipMasq {
		if err := setupIpMasq(sn, rb.sm.GetConfig().Network); err != nil {
			return nil, fmt.Errorf("Failed to configure ip-masq: %v", err)
		}

	}

	/* NB: docker will create the local route to `sn` */

	return &backend.SubnetDef{
		Net: sn,
		MTU: extIface.MTU,
	}, nil
}
Esempio n. 2
0
/// Implementation
func parseSubnetKey(s string) (ip.IP4Net, error) {
	if parts := subnetRegex.FindStringSubmatch(s); len(parts) == 3 {
		snIp := net.ParseIP(parts[1]).To4()
		prefixLen, err := strconv.ParseUint(parts[2], 10, 5)
		if snIp != nil && err == nil {
			return ip.IP4Net{IP: ip.FromIP(snIp), PrefixLen: uint(prefixLen)}, nil
		}
	}

	return ip.IP4Net{}, errors.New("Error parsing IP Subnet")
}
Esempio n. 3
0
func (m *UdpBackend) Init(extIface *net.Interface, extIP net.IP, httpPort string, ipMasq bool) (*backend.SubnetDef, error) {
	// Parse our configuration
	if len(m.rawCfg) > 0 {
		if err := json.Unmarshal(m.rawCfg, &m.cfg); err != nil {
			return nil, fmt.Errorf("error decoding UDP backend config: %v", err)
		}
	}

	// Acquire the lease form subnet manager
	attrs := subnet.LeaseAttrs{
		PublicIP: ip.FromIP(extIP),
		HTTPPort: httpPort,
	}

	sn, err := m.sm.AcquireLease(&attrs, m.stop)
	if err != nil {
		if err == task.ErrCanceled {
			return nil, err
		} else {
			return nil, fmt.Errorf("failed to acquire lease: %v", err)
		}
	}

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

	// TUN MTU will be smaller b/c of encap (IP+UDP hdrs)
	m.mtu = extIface.MTU - encapOverhead

	if err = m.initTun(ipMasq); err != nil {
		return nil, err
	}

	m.conn, err = net.ListenUDP("udp4", &net.UDPAddr{Port: m.cfg.Port})
	if err != nil {
		return nil, fmt.Errorf("failed to start listening on UDP socket: %v", err)
	}

	m.ctl, m.ctl2, err = newCtlSockets()
	if err != nil {
		return nil, fmt.Errorf("failed to create control socket: %v", err)
	}

	return &backend.SubnetDef{
		Net: sn,
		MTU: m.mtu,
	}, nil
}
Esempio n. 4
0
func (m *AllocBackend) Init(extIface *net.Interface, extIP net.IP, httpPort string, ipMasq bool) (*backend.SubnetDef, error) {
	attrs := subnet.LeaseAttrs{
		PublicIP: ip.FromIP(extIP),
		HTTPPort: httpPort,
	}

	sn, err := m.sm.AcquireLease(&attrs, m.stop)
	if err != nil {
		if err == task.ErrCanceled {
			return nil, err
		} else {
			return nil, fmt.Errorf("failed to acquire lease: %v", err)
		}
	}

	return &backend.SubnetDef{
		Net: sn,
		MTU: extIface.MTU,
	}, nil
}