logos-messaging/go-multiaddr
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rename, comment, and move loopback prefixes

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This commit is contained in:
Steven Allen 2018-03-08 13:34:36 -08:00
parent d1762038d1
commit ef7ebf9dd8
1 changed files with 9 additions and 7 deletions
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16
ip.go
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@ -24,6 +24,14 @@ var (
IP6Unspecified = ma.StringCast("/ip6/::")
)
// Loopback multiaddr prefixes. Any multiaddr beginning with one of the
// following byte sequences is considered a loopback multiaddr.
var loopbackPrefixes = [][]byte{
{ma.P_IP4, 127}, // 127.*
IP6LinkLocalLoopback.Bytes(),
IP6Loopback.Bytes(),
}
// IsThinWaist returns whether a Multiaddr starts with "Thin Waist" Protocols.
// This means: /{IP4, IP6}[/{TCP, UDP}]
func IsThinWaist(m ma.Multiaddr) bool {
@ -51,17 +59,11 @@ func IsThinWaist(m ma.Multiaddr) bool {
}
}
var localPrefixes = [][]byte{
{ma.P_IP4, 127}, // 127.*
IP6LinkLocalLoopback.Bytes(),
IP6Loopback.Bytes(),
}
// IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address
// This means either /ip4/127.*.*.*, /ip6/::1, or /ip6/fe80::1
func IsIPLoopback(m ma.Multiaddr) bool {
b := m.Bytes()
for _, prefix := range localPrefixes {
for _, prefix := range loopbackPrefixes {
if bytes.HasPrefix(b, prefix) {
return true
}