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go-multiaddr
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IP unspecified addrs

This commit is contained in:
Juan Batiz-Benet 2014-11-05 02:06:28 -08:00
parent f05346f34e
commit 5b8fc748ca
3 changed files with 95 additions and 58 deletions
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57
net/convert.go
View File

@ -1,7 +1,6 @@
package manet
import (
"bytes"
"fmt"
"net"
"strings"
@ -9,17 +8,6 @@ import (
ma "github.com/jbenet/go-multiaddr"
)
var (
// IP4Loopback is the ip4 loopback multiaddr
IP4Loopback = ma.StringCast("/ip4/127.0.0.1")
// IP6Loopback is the ip6 loopback multiaddr
IP6Loopback = ma.StringCast("/ip6/::1")
// IP6LinkLocalLoopback is the ip6 link-local loopback multiaddr
IP6LinkLocalLoopback = ma.StringCast("/ip6/fe80::1")
)
var errIncorrectNetAddr = fmt.Errorf("incorrect network addr conversion")
// FromNetAddr converts a net.Addr type to a Multiaddr.
@ -142,48 +130,3 @@ func DialArgs(m ma.Multiaddr) (string, string, error) {
}
return network, host, nil
}
// IsThinWaist returns whether a Multiaddr starts with "Thin Waist" Protocols.
// This means: /{IP4, IP6}[/{TCP, UDP}]
func IsThinWaist(m ma.Multiaddr) bool {
p := m.Protocols()
// nothing? not even a waist.
if len(p) == 0 {
return false
}
if p[0].Code != ma.P_IP4 && p[0].Code != ma.P_IP6 {
return false
}
// only IP? still counts.
if len(p) == 1 {
return true
}
switch p[1].Code {
case ma.P_TCP, ma.P_UDP, ma.P_IP4, ma.P_IP6:
return true
default:
return false
}
}
// IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address
// This means either /ip4/127.0.0.1 or /ip6/::1
func IsIPLoopback(m ma.Multiaddr) bool {
b := m.Bytes()
// /ip4/127 prefix (_entire_ /8 is loopback...)
if bytes.HasPrefix(b, []byte{4, 127}) {
return true
}
// /ip6/::1
if IP6Loopback.Equal(m) || IP6LinkLocalLoopback.Equal(m) {
return true
}
return false
}

76
net/ip.go Normal file
View File

@ -0,0 +1,76 @@
package manet
import (
"bytes"
ma "github.com/jbenet/go-multiaddr"
)
// Loopback Addresses
var (
// IP4Loopback is the ip4 loopback multiaddr
IP4Loopback = ma.StringCast("/ip4/127.0.0.1")
// IP6Loopback is the ip6 loopback multiaddr
IP6Loopback = ma.StringCast("/ip6/::1")
// IP6LinkLocalLoopback is the ip6 link-local loopback multiaddr
IP6LinkLocalLoopback = ma.StringCast("/ip6/fe80::1")
)
// Unspecified Addresses (used for )
var (
IP4Unspecified = ma.StringCast("/ip4/0.0.0.0")
IP6Unspecified = ma.StringCast("/ip6/::")
)
// IsThinWaist returns whether a Multiaddr starts with "Thin Waist" Protocols.
// This means: /{IP4, IP6}[/{TCP, UDP}]
func IsThinWaist(m ma.Multiaddr) bool {
p := m.Protocols()
// nothing? not even a waist.
if len(p) == 0 {
return false
}
if p[0].Code != ma.P_IP4 && p[0].Code != ma.P_IP6 {
return false
}
// only IP? still counts.
if len(p) == 1 {
return true
}
switch p[1].Code {
case ma.P_TCP, ma.P_UDP, ma.P_IP4, ma.P_IP6:
return true
default:
return false
}
}
// IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address
// This means either /ip4/127.0.0.1 or /ip6/::1
func IsIPLoopback(m ma.Multiaddr) bool {
b := m.Bytes()
// /ip4/127 prefix (_entire_ /8 is loopback...)
if bytes.HasPrefix(b, []byte{4, 127}) {
return true
}
// /ip6/::1
if IP6Loopback.Equal(m) || IP6LinkLocalLoopback.Equal(m) {
return true
}
return false
}
// IsIPUnspecified returns whether a Multiaddr is am Unspecified IP address
// This means either /ip4/0.0.0.0 or /ip6/::
func IsIPUnspecified(m ma.Multiaddr) bool {
return IP4Unspecified.Equal(m) || IP6Unspecified.Equal(m)
}

20
net/net_test.go
View File

@ -199,7 +199,7 @@ func TestListenAndDial(t *testing.T) {
wg.Wait()
}
func TestLoopback(t *testing.T) {
func TestIPLoopback(t *testing.T) {
if IP4Loopback.String() != "/ip4/127.0.0.1" {
t.Error("IP4Loopback incorrect:", IP4Loopback)
}
@ -224,3 +224,21 @@ func TestLoopback(t *testing.T) {
t.Error("IsIPLoopback failed (IP6LinkLocalLoopback)")
}
}
func TestIPUnspecified(t *testing.T) {
if IP4Unspecified.String() != "/ip4/0.0.0.0" {
t.Error("IP4Unspecified incorrect:", IP4Unspecified)
}
if IP6Unspecified.String() != "/ip6/::" {
t.Error("IP6Unspecified incorrect:", IP6Unspecified)
}
if !IsIPUnspecified(IP4Unspecified) {
t.Error("IsIPUnspecified failed (IP4Unspecified)")
}
if !IsIPUnspecified(IP6Unspecified) {
t.Error("IsIPUnspecified failed (IP6Unspecified)")
}
}