// Allocate a network interface
func Allocate(job *engine.Job) engine.Status {
var (
ip *net.IP
err error
id = job.Args[0]
requestedIP = net.ParseIP(job.Getenv("RequestedIP"))
)
if requestedIP != nil {
ip, err = ipallocator.RequestIP(bridgeNetwork, &requestedIP)
} else {
ip, err = ipallocator.RequestIP(bridgeNetwork, nil)
}
if err != nil {
return job.Error(err)
}
out := engine.Env{}
out.Set("IP", ip.String())
out.Set("Mask", bridgeNetwork.Mask.String())
out.Set("Gateway", bridgeNetwork.IP.String())
out.Set("Bridge", bridgeIface)
size, _ := bridgeNetwork.Mask.Size()
out.SetInt("IPPrefixLen", size)
currentInterfaces.Set(id, &networkInterface{
IP: *ip,
})
out.WriteTo(job.Stdout)
return engine.StatusOK
}
func (t *TapManager) NewTap(uid, gid int) (*Tap, error) {
tap := &Tap{Name: "flynntap." + util.RandomString(5), bridge: t.bridge}
if err := createTap(tap.Name, uid, gid); err != nil {
return nil, err
}
var err error
tap.LocalIP, err = ipallocator.RequestIP(t.bridge.ipNet, nil)
if err != nil {
tap.Close()
return nil, err
}
tap.RemoteIP, err = ipallocator.RequestIP(t.bridge.ipNet, nil)
if err != nil {
tap.Close()
return nil, err
}
iface, err := net.InterfaceByName(tap.Name)
if err != nil {
tap.Close()
return nil, err
}
if err := netlink.NetworkLinkAddIp(iface, *tap.LocalIP, t.bridge.ipNet); err != nil {
tap.Close()
return nil, err
}
if err := netlink.NetworkLinkUp(iface); err != nil {
tap.Close()
return nil, err
}
if err := netlink.AddToBridge(iface, t.bridge.iface); err != nil {
tap.Close()
return nil, err
}
return tap, nil
}