// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package netutil
import (
"fmt"
"net"
"reflect"
"testing"
"testing/quick"
"github.com/davecgh/go-spew/spew"
)
func TestParseNetlist(t *testing.T) {
var tests = []struct {
input string
wantErr error
wantList *Netlist
}{
{
input: "",
wantList: &Netlist{},
},
{
input: "127.0.0.0/8",
wantErr: nil,
wantList: &Netlist{{IP: net.IP{127, 0, 0, 0}, Mask: net.CIDRMask(8, 32)}},
},
{
input: "127.0.0.0/44",
wantErr: &net.ParseError{Type: "CIDR address", Text: "127.0.0.0/44"},
},
{
input: "127.0.0.0/16, 23.23.23.23/24,",
wantList: &Netlist{
{IP: net.IP{127, 0, 0, 0}, Mask: net.CIDRMask(16, 32)},
{IP: net.IP{23, 23, 23, 0}, Mask: net.CIDRMask(24, 32)},
},
},
}
for _, test := range tests {
l, err := ParseNetlist(test.input)
if !reflect.DeepEqual(err, test.wantErr) {
t.Errorf("%q: got error %q, want %q", test.input, err, test.wantErr)
continue
}
if !reflect.DeepEqual(l, test.wantList) {
spew.Dump(l)
spew.Dump(test.wantList)
t.Errorf("%q: got %v, want %v", test.input, l, test.wantList)
}
}
}
func TestNilNetListContains(t *testing.T) {
var list *Netlist
checkContains(t, list.Contains, nil, []string{"1.2.3.4"})
}
func TestIsLAN(t *testing.T) {
checkContains(t, IsLAN,
[]string{ // included
"0.0.0.0",
"0.2.0.8",
"127.0.0.1",
"10.0.1.1",
"10.22.0.3",
"172.31.252.251",
"192.168.1.4",
"fe80::f4a1:8eff:fec5:9d9d",
"febf::ab32:2233",
"fc00::4",
},
[]string{ // excluded
"192.0.2.1",
"1.0.0.0",
"172.32.0.1",
"fec0::2233",
},
)
}
func TestIsSpecialNetwork(t *testing.T) {
checkContains(t, IsSpecialNetwork,
[]string{ // included
"192.0.2.1",
"192.0.2.44",
"2001:db8:85a3:8d3:1319:8a2e:370:7348",
"255.255.255.255",
"224.0.0.22", // IPv4 multicast
"ff05::1:3", // IPv6 multicast
},
[]string{ // excluded
"192.0.3.1",
"1.0.0.0",
"172.32.0.1",
"fec0::2233",
},
)
}
func checkContains(t *testing.T, fn func(net.IP) bool, inc, exc []string) {
for _, s := range inc {
if !fn(parseIP(s)) {
t.Error("returned false for included address", s)
}
}
for _, s := range exc {
if fn(parseIP(s)) {
t.Error("returned true for excluded address", s)
}
}
}
func parseIP(s string) net.IP {
ip := net.ParseIP(s)
if ip == nil {
panic("invalid " + s)
}
return ip
}
func TestCheckRelayIP(t *testing.T) {
tests := []struct {
sender, addr string
want error
}{
{"127.0.0.1", "0.0.0.0", errUnspecified},
{"192.168.0.1", "0.0.0.0", errUnspecified},
{"23.55.1.242", "0.0.0.0", errUnspecified},
{"127.0.0.1", "255.255.255.255", errSpecial},
{"192.168.0.1", "255.255.255.255", errSpecial},
{"23.55.1.242", "255.255.255.255", errSpecial},
{"192.168.0.1", "127.0.2.19", errLoopback},
{"23.55.1.242", "192.168.0.1", errLAN},
{"127.0.0.1", "127.0.2.19", nil},
{"127.0.0.1", "192.168.0.1", nil},
{"127.0.0.1", "23.55.1.242", nil},
{"192.168.0.1", "192.168.0.1", nil},
{"192.168.0.1", "23.55.1.242", nil},
{"23.55.1.242", "23.55.1.242", nil},
}
for _, test := range tests {
err := CheckRelayIP(parseIP(test.sender), parseIP(test.addr))
if err != test.want {
t.Errorf("%s from %s: got %q, want %q", test.addr, test.sender, err, test.want)
}
}
}
func BenchmarkCheckRelayIP(b *testing.B) {
sender := parseIP("23.55.1.242")
addr := parseIP("23.55.1.2")
for i := 0; i < b.N; i++ {
CheckRelayIP(sender, addr)
}
}
func TestSameNet(t *testing.T) {
tests := []struct {
ip, other string
bits uint
want bool
}{
{"0.0.0.0", "0.0.0.0", 32, true},
{"0.0.0.0", "0.0.0.1", 0, true},
{"0.0.0.0", "0.0.0.1", 31, true},
{"0.0.0.0", "0.0.0.1", 32, false},
{"0.33.0.1", "0.34.0.2", 8, true},
{"0.33.0.1", "0.34.0.2", 13, true},
{"0.33.0.1", "0.34.0.2", 15, false},
}
for _, test := range tests {
if ok := SameNet(test.bits, parseIP(test.ip), parseIP(test.other)); ok != test.want {
t.Errorf("SameNet(%d, %s, %s) == %t, want %t", test.bits, test.ip, test.other, ok, test.want)
}
}
}
func ExampleSameNet() {
// This returns true because the IPs are in the same /24 network:
fmt.Println(SameNet(24, net.IP{127, 0, 0, 1}, net.IP{127, 0, 0, 3}))
// This call returns false:
fmt.Println(SameNet(24, net.IP{127, 3, 0, 1}, net.IP{127, 5, 0, 3}))
// Output:
// true
// false
}
func TestDistinctNetSet(t *testing.T) {
ops := []struct {
add, remove string
fails bool
}{
{add: "127.0.0.1"},
{add: "127.0.0.2"},
{add: "127.0.0.3", fails: true},
{add: "127.32.0.1"},
{add: "127.32.0.2"},
{add: "127.32.0.3", fails: true},
{add: "127.33.0.1", fails: true},
{add: "127.34.0.1"},
{add: "127.34.0.2"},
{add: "127.34.0.3", fails: true},
// Make room for an address, then add again.
{remove: "127.0.0.1"},
{add: "127.0.0.3"},
{add: "127.0.0.3", fails: true},
}
set := DistinctNetSet{Subnet: 15, Limit: 2}
for _, op := range ops {
var desc string
if op.add != "" {
desc = fmt.Sprintf("Add(%s)", op.add)
if ok := set.Add(parseIP(op.add)); ok != !op.fails {
t.Errorf("%s == %t, want %t", desc, ok, !op.fails)
}
} else {
desc = fmt.Sprintf("Remove(%s)", op.remove)
set.Remove(parseIP(op.remove))
}
t.Logf("%s: %v", desc, set)
}
}
func TestDistinctNetSetAddRemove(t *testing.T) {
cfg := &quick.Config{}
fn := func(ips []net.IP) bool {
s := DistinctNetSet{Limit: 3, Subnet: 2}
for _, ip := range ips {
s.Add(ip)
}
for _, ip := range ips {
s.Remove(ip)
}
return s.Len() == 0
}
if err := quick.Check(fn, cfg); err != nil {
t.Fatal(err)
}
}
