func (v *veth) initialize(config *network) error {
peer := config.TempVethPeerName
if peer == "" {
return fmt.Errorf("peer is not specified")
}
child, err := net.InterfaceByName(peer)
if err != nil {
return err
}
if err := netlink.NetworkLinkDown(child); err != nil {
return err
}
if err := netlink.NetworkChangeName(child, config.Name); err != nil {
return err
}
// get the interface again after we changed the name as the index also changes.
if child, err = net.InterfaceByName(config.Name); err != nil {
return err
}
if config.MacAddress != "" {
if err := netlink.NetworkSetMacAddress(child, config.MacAddress); err != nil {
return err
}
}
ip, ipNet, err := net.ParseCIDR(config.Address)
if err != nil {
return err
}
if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil {
return err
}
if config.IPv6Address != "" {
if ip, ipNet, err = net.ParseCIDR(config.IPv6Address); err != nil {
return err
}
if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil {
return err
}
}
if err := netlink.NetworkSetMTU(child, config.Mtu); err != nil {
return err
}
if err := netlink.NetworkLinkUp(child); err != nil {
return err
}
if config.Gateway != "" {
if err := netlink.AddDefaultGw(config.Gateway, config.Name); err != nil {
return err
}
}
if config.IPv6Gateway != "" {
if err := netlink.AddDefaultGw(config.IPv6Gateway, config.Name); err != nil {
return err
}
}
return nil
}
// SetLinkNetInNs configures network settings of the link in network namespace specified by PID.
func (l *Link) SetLinkNetInNs(nspid int, ip net.IP, network *net.IPNet, gw *net.IP) error {
origNs, _ := NetNsHandle(os.Getpid())
defer syscall.Close(int(origNs))
defer system.Setns(origNs, syscall.CLONE_NEWNET)
if err := SetNetNsToPid(nspid); err != nil {
return fmt.Errorf("Setting network namespace failed: %s", err)
}
if err := netlink.NetworkLinkAddIp(l.NetInterface(), ip, network); err != nil {
return fmt.Errorf("Unable to set IP: %s in pid: %d network namespace", ip.String(), nspid)
}
if err := netlink.NetworkLinkUp(l.ifc); err != nil {
return fmt.Errorf("Unable to bring %s interface UP: %s", l.ifc.Name, nspid)
}
if gw != nil {
if err := netlink.AddDefaultGw(gw.String(), l.NetInterface().Name); err != nil {
return fmt.Errorf("Unable to set Default gateway: %s in pid: %d network namespace", gw.String(), nspid)
}
}
return nil
}
// SetLinkIp configures the link's IP address.
// It is equivalent of running: ip address add ${address}/${mask} dev ${interface name}
func (l *Link) SetLinkIp(ip net.IP, network *net.IPNet) error {
errToReturn := netlink.NetworkLinkAddIp(l.NetInterface(), ip, network)
// Nécéssaire car il semble y avoir un «Race condition»
inter, err := net.InterfaceByName(l.NetInterface().Name)
if err != nil {
log.Fatal(err)
}
addrs, _ := inter.Addrs()
i := 0
for len(addrs) == 0 && i <= 10 {
addrs, _ = inter.Addrs()
fmt.Println("Waiting this interface : ", l.NetInterface().Name)
time.Sleep(time.Millisecond * 100)
i++
}
return errToReturn
}
// SetLinkIp configures the link's IP address.
// It is equivalent of running: ip address add ${address}/${mask} dev ${interface name}
func (l *Link) SetLinkIp(ip net.IP, network *net.IPNet) error {
return netlink.NetworkLinkAddIp(l.NetInterface(), ip, network)
}
// SetPeerLinkIp configures peer link's IP address
func (veth *VethPair) SetPeerLinkIp(ip net.IP, nw *net.IPNet) error {
return netlink.NetworkLinkAddIp(veth.peerIfc, ip, nw)
}