p2p/netutil: new package for network utilities
The new package contains three things for now: - IP network list parsing and matching - The WSAEMSGSIZE workaround, which is duplicated in p2p/discover and p2p/discv5.
This commit is contained in:
Felix Lange
173
p2p/netutil/net_test.go
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173
p2p/netutil/net_test.go
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// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package netutil
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import (
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"net"
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"reflect"
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"testing"
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"github.com/davecgh/go-spew/spew"
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)
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func TestParseNetlist(t *testing.T) {
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var tests = []struct {
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input string
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wantErr error
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wantList *Netlist
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}{
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{
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input: "",
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wantList: &Netlist{},
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},
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{
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input: "127.0.0.0/8",
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wantErr: nil,
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wantList: &Netlist{{IP: net.IP{127, 0, 0, 0}, Mask: net.CIDRMask(8, 32)}},
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},
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{
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input: "127.0.0.0/44",
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wantErr: &net.ParseError{Type: "CIDR address", Text: "127.0.0.0/44"},
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},
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{
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input: "127.0.0.0/16, 23.23.23.23/24,",
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wantList: &Netlist{
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{IP: net.IP{127, 0, 0, 0}, Mask: net.CIDRMask(16, 32)},
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{IP: net.IP{23, 23, 23, 0}, Mask: net.CIDRMask(24, 32)},
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},
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},
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}
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for _, test := range tests {
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l, err := ParseNetlist(test.input)
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if !reflect.DeepEqual(err, test.wantErr) {
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t.Errorf("%q: got error %q, want %q", test.input, err, test.wantErr)
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continue
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}
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if !reflect.DeepEqual(l, test.wantList) {
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spew.Dump(l)
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spew.Dump(test.wantList)
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t.Errorf("%q: got %v, want %v", test.input, l, test.wantList)
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}
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}
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}
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func TestNilNetListContains(t *testing.T) {
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var list *Netlist
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checkContains(t, list.Contains, nil, []string{"1.2.3.4"})
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}
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func TestIsLAN(t *testing.T) {
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checkContains(t, IsLAN,
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[]string{ // included
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"0.0.0.0",
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"0.2.0.8",
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"127.0.0.1",
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"10.0.1.1",
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"10.22.0.3",
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"172.31.252.251",
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"192.168.1.4",
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"fe80::f4a1:8eff:fec5:9d9d",
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"febf::ab32:2233",
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"fc00::4",
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},
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[]string{ // excluded
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"192.0.2.1",
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"1.0.0.0",
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"172.32.0.1",
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"fec0::2233",
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},
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)
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}
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func TestIsSpecialNetwork(t *testing.T) {
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checkContains(t, IsSpecialNetwork,
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[]string{ // included
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"192.0.2.1",
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"192.0.2.44",
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"2001:db8:85a3:8d3:1319:8a2e:370:7348",
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"255.255.255.255",
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"224.0.0.22", // IPv4 multicast
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"ff05::1:3", // IPv6 multicast
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},
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[]string{ // excluded
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"192.0.3.1",
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"1.0.0.0",
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"172.32.0.1",
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"fec0::2233",
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},
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)
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}
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func checkContains(t *testing.T, fn func(net.IP) bool, inc, exc []string) {
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for _, s := range inc {
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if !fn(parseIP(s)) {
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t.Error("returned false for included address", s)
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}
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}
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for _, s := range exc {
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if fn(parseIP(s)) {
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t.Error("returned true for excluded address", s)
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}
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}
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}
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func parseIP(s string) net.IP {
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ip := net.ParseIP(s)
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if ip == nil {
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panic("invalid " + s)
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}
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return ip
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}
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func TestCheckRelayIP(t *testing.T) {
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tests := []struct {
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sender, addr string
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want error
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}{
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{"127.0.0.1", "0.0.0.0", errUnspecified},
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{"192.168.0.1", "0.0.0.0", errUnspecified},
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{"23.55.1.242", "0.0.0.0", errUnspecified},
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{"127.0.0.1", "255.255.255.255", errSpecial},
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{"192.168.0.1", "255.255.255.255", errSpecial},
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{"23.55.1.242", "255.255.255.255", errSpecial},
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{"192.168.0.1", "127.0.2.19", errLoopback},
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{"23.55.1.242", "192.168.0.1", errLAN},
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{"127.0.0.1", "127.0.2.19", nil},
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{"127.0.0.1", "192.168.0.1", nil},
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{"127.0.0.1", "23.55.1.242", nil},
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{"192.168.0.1", "192.168.0.1", nil},
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{"192.168.0.1", "23.55.1.242", nil},
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{"23.55.1.242", "23.55.1.242", nil},
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}
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for _, test := range tests {
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err := CheckRelayIP(parseIP(test.sender), parseIP(test.addr))
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if err != test.want {
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t.Errorf("%s from %s: got %q, want %q", test.addr, test.sender, err, test.want)
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}
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}
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}
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func BenchmarkCheckRelayIP(b *testing.B) {
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sender := parseIP("23.55.1.242")
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addr := parseIP("23.55.1.2")
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for i := 0; i < b.N; i++ {
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CheckRelayIP(sender, addr)
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}
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}
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