func DefaultOverlay(e xt.EndPointI) (o OverlayI, err error) {
t := e.Transport()
switch t {
case "ip":
fallthrough
case "udp":
fallthrough
case "tcp":
t = "ip"
default:
return nil, errors.New("not implemented")
}
// KLUDGE
tcpE := e.(*xt.TcpEndPoint)
tcpA := tcpE.GetTcpAddr() // IP, Port, Zone fields
v4Addr := tcpA.IP[12:]
// 127/8 or 10/8 or 172.16/12 or 192.168/16
if v4Addr[0] == 127 {
aRange, err := NewCIDRAddrRange("127.0.0.0/8")
if err == nil {
o, err = NewIPOverlay("localhost", aRange, "ip", 1.0)
}
} else if v4Addr[0] == 10 {
aRange, err := NewCIDRAddrRange("10.0.0.0/8")
if err == nil {
o, err = NewIPOverlay("privateA", aRange, "ip", 1.0)
}
} else if v4Addr[0] == 172 && v4Addr[1] >= 16 && v4Addr[1] < 32 {
aRange, err := NewCIDRAddrRange("172.16.0.0/12")
if err == nil {
o, err = NewIPOverlay("privateB", aRange, "ip", 1.0)
}
} else if v4Addr[0] == 192 && v4Addr[1] == 168 {
aRange, err := NewCIDRAddrRange("192.168.0.0/16")
if err == nil {
o, err = NewIPOverlay("privateC", aRange, "ip", 1.0)
}
} else {
aRange, err := NewCIDRAddrRange("0.0.0.0/0")
if err == nil {
o, err = NewIPOverlay("globalV4", aRange, "ip", 1.0)
}
}
return
}
func (o *IPOverlay) IsElement(e xt.EndPointI) bool {
oT := o.Transport()
eT := e.Transport()
if !CompatibleTransports(oT, eT) {
return false
}
eA := e.Address().String()
parts := strings.Split(eA, ":")
bs := net.ParseIP(parts[0]) // returns an IP, a []byte
if bs == nil {
fmt.Printf("could not parse '%s'\n", eA)
return false
}
return o.addrRange.ipNet.Contains(bs)
}