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p2p/netutil: fixes for 4-in-6

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This commit is contained in:
Felix Lange 2024-05-30 17:59:46 +02:00
parent ae3966eb01
commit 6ffd98d337
2 changed files with 27 additions and 7 deletions
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8
p2p/netutil/net.go
View file

@ -145,6 +145,9 @@ func IsLAN(ip net.IP) bool {
// IsLAN reports whether an IP is a local network address.
func AddrIsLAN(ip netip.Addr) bool {
if ip.Is4In6() {
ip = netip.AddrFrom4(ip.As4())
}
if ip.IsLoopback() {
return true
}
@ -160,10 +163,13 @@ func IsSpecialNetwork(ip net.IP) bool {
// AddrIsSpecialNetwork reports whether an IP is located in a special-use network range
// This includes broadcast, multicast and documentation addresses.
func AddrIsSpecialNetwork(ip netip.Addr) bool {
if ip.Is4In6() {
ip = netip.AddrFrom4(ip.As4())
}
if ip.IsMulticast() {
return true
}
if ip.Is4() || ip.Is4In6() {
if ip.Is4() {
return special4.ContainsAddr(ip)
}
return special6.ContainsAddr(ip)

26
p2p/netutil/net_test.go
View file

@ -74,11 +74,11 @@ func TestParseNetlist(t *testing.T) {
func TestNilNetListContains(t *testing.T) {
var list *Netlist
checkContains(t, list.Contains, nil, []string{"1.2.3.4"})
checkContains(t, list.Contains, list.ContainsAddr, nil, []string{"1.2.3.4"})
}
func TestIsLAN(t *testing.T) {
checkContains(t, IsLAN,
checkContains(t, IsLAN, AddrIsLAN,
[]string{ // included
"127.0.0.1",
"10.0.1.1",
@ -88,18 +88,23 @@ func TestIsLAN(t *testing.T) {
"fe80::f4a1:8eff:fec5:9d9d",
"febf::ab32:2233",
"fc00::4",
// 4-in-6
"::ffff:127.0.0.1",
"::ffff:10.10.0.2",
},
[]string{ // excluded
"192.0.2.1",
"1.0.0.0",
"172.32.0.1",
"fec0::2233",
// 4-in-6
"::ffff:88.99.100.2",
},
)
}
func TestIsSpecialNetwork(t *testing.T) {
checkContains(t, IsSpecialNetwork,
checkContains(t, IsSpecialNetwork, AddrIsSpecialNetwork,
[]string{ // included
"0.0.0.0",
"0.2.0.8",
@ -109,6 +114,9 @@ func TestIsSpecialNetwork(t *testing.T) {
"255.255.255.255",
"224.0.0.22", // IPv4 multicast
"ff05::1:3", // IPv6 multicast
// 4-in-6
"::ffff:255.255.255.255",
"::ffff:192.0.2.1",
},
[]string{ // excluded
"192.0.3.1",
@ -119,15 +127,21 @@ func TestIsSpecialNetwork(t *testing.T) {
)
}
func checkContains(t *testing.T, fn func(net.IP) bool, inc, exc []string) {
func checkContains(t *testing.T, fn func(net.IP) bool, fn2 func(netip.Addr) bool, inc, exc []string) {
for _, s := range inc {
if !fn(parseIP(s)) {
t.Error("returned false for included address", s)
t.Error("returned false for included net.IP", s)
}
if !fn2(netip.MustParseAddr(s)) {
t.Error("returned false for included netip.Addr", s)
}
}
for _, s := range exc {
if fn(parseIP(s)) {
t.Error("returned true for excluded address", s)
t.Error("returned true for excluded net.IP", s)
}
if fn2(netip.MustParseAddr(s)) {
t.Error("returned true for excluded netip.Addr", s)
}
}
}