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make the Is* commands only check if addrs start with

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It turns out we *were* relying on this. Furthermore, this is generally more
useful (especially given ip6zones).
This commit is contained in:
Steven Allen 2018-10-24 09:04:25 -07:00
parent 4ae0494b14
commit a7b912ae71
2 changed files with 8 additions and 19 deletions
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19
ip.go
View File

@ -55,19 +55,15 @@ func IsThinWaist(m ma.Multiaddr) bool {
}
}
// IsIPLoopback returns whether a Multiaddr is a "Loopback" IP address
// This means either /ip4/127.*.*.*, /ip6/::1, or /ip6/::ffff:127.*.*.*.*,
// or /ip6zone/<any value>/ip6/<one of the preceding ip6 values>
// IsIPLoopback returns whether a Multiaddr starts with a "Loopback" IP address
// This means either /ip4/127.*.*.*/*, /ip6/::1/*, or /ip6/::ffff:127.*.*.*.*/*,
// or /ip6zone/<any value>/ip6/<one of the preceding ip6 values>/*
func IsIPLoopback(m ma.Multiaddr) bool {
m = zoneless(m)
c, rest := ma.SplitFirst(m)
c, _ := ma.SplitFirst(m)
if c == nil {
return false
}
if rest != nil {
// Not *just* an IPv4 addr
return false
}
switch c.Protocol().Code {
case ma.P_IP4, ma.P_IP6:
return net.IP(c.RawValue()).IsLoopback()
@ -88,14 +84,15 @@ func IsIP6LinkLocal(m ma.Multiaddr) bool {
return ip.IsLinkLocalMulticast() || ip.IsLinkLocalUnicast()
}
// IsIPUnspecified returns whether a Multiaddr is am Unspecified IP address
// This means either /ip4/0.0.0.0 or /ip6/::
// IsIPUnspecified returns whether a Multiaddr starts with an Unspecified IP address
// This means either /ip4/0.0.0.0/* or /ip6/::/*
func IsIPUnspecified(m ma.Multiaddr) bool {
m = zoneless(m)
if m == nil {
return false
}
return IP4Unspecified.Equal(m) || IP6Unspecified.Equal(m)
c, _ := ma.SplitFirst(m)
return net.IP(c.RawValue()).IsUnspecified()
}
// If m matches [zone,ip6,...], return [ip6,...]

8
net_test.go
View File

@ -330,10 +330,6 @@ func TestIPLoopback(t *testing.T) {
t.Error("IsIPLoopback false positive (/ip4/112.123.11.1)")
}
if IsIPLoopback(newMultiaddr(t, "/ip4/127.0.0.1/ip4/127.0.0.1")) {
t.Error("IsIPLoopback false positive (/ip4/127.0.0.1/127.0.0.1)")
}
if IsIPLoopback(newMultiaddr(t, "/ip4/192.168.0.1/ip6/::1")) {
t.Error("IsIPLoopback false positive (/ip4/192.168.0.1/ip6/::1)")
}
@ -362,10 +358,6 @@ func TestIPLoopback(t *testing.T) {
t.Error("IsIPLoopback failed (/ip6zone/xxx/ip6/::1)")
}
if IsIPLoopback(newMultiaddr(t, "/ip6zone/0/ip6/::1/tcp/3333")) {
t.Error("IsIPLoopback failed (/ip6zone/0/ip6/::1/tcp/3333)")
}
if IsIPLoopback(newMultiaddr(t, "/ip6zone/0/ip6/1::1")) {
t.Errorf("IsIPLoopback false positive (/ip6zone/0/ip6/1::1)")
}