示例#1
0
// IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address
// This means either /ip4/127.0.0.1 or /ip6/::1
// TODO: differentiate IsIPLoopback and OverIPLoopback
func IsIPLoopback(m ma.Multiaddr) bool {
	b := m.Bytes()

	// /ip4/127 prefix (_entire_ /8 is loopback...)
	if bytes.HasPrefix(b, []byte{ma.P_IP4, 127}) {
		return true
	}

	// /ip6/::1
	if IP6Loopback.Equal(m) || IP6LinkLocalLoopback.Equal(m) {
		return true
	}

	return false
}
示例#2
0
func outfmt(m ma.Multiaddr) string {
	switch format {
	case "string":
		return m.String()
	case "slice":
		return fmt.Sprintf("%v", m.Bytes())
	case "bytes":
		return string(m.Bytes())
	case "hex":
		return "0x" + hex.EncodeToString(m.Bytes())
	}

	die("error: invalid format", format)
	return ""
}
示例#3
0
// IP6 Link Local addresses are non routable. The prefix is technically
// fe80::/10, but we test fe80::/16 for simplicity (no need to mask).
// So far, no hardware interfaces exist long enough to use those 2 bits.
// Send a PR if there is.
func IsIP6LinkLocal(m ma.Multiaddr) bool {
	return bytes.HasPrefix(m.Bytes(), []byte{ma.P_IP6, 0xfe, 0x80})
}