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129 lines
4.0 KiB
129 lines
4.0 KiB
// Copyright 2018 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 enode
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import (
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"math/rand"
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"net"
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"testing"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/p2p/enr"
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"github.com/stretchr/testify/assert"
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)
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func newLocalNodeForTesting() (*LocalNode, *DB) {
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db, _ := OpenDB("")
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key, _ := crypto.GenerateKey()
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return NewLocalNode(db, key), db
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}
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func TestLocalNode(t *testing.T) {
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ln, db := newLocalNodeForTesting()
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defer db.Close()
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if ln.Node().ID() != ln.ID() {
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t.Fatal("inconsistent ID")
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}
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ln.Set(enr.WithEntry("x", uint(3)))
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var x uint
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if err := ln.Node().Load(enr.WithEntry("x", &x)); err != nil {
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t.Fatal("can't load entry 'x':", err)
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} else if x != 3 {
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t.Fatal("wrong value for entry 'x':", x)
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}
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}
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// This test checks that the sequence number is persisted between restarts.
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func TestLocalNodeSeqPersist(t *testing.T) {
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timestamp := nowMilliseconds()
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ln, db := newLocalNodeForTesting()
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defer db.Close()
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initialSeq := ln.Node().Seq()
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if initialSeq < timestamp {
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t.Fatalf("wrong initial seq %d, want at least %d", initialSeq, timestamp)
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}
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ln.Set(enr.WithEntry("x", uint(1)))
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if s := ln.Node().Seq(); s != initialSeq+1 {
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t.Fatalf("wrong seq %d after set, want %d", s, initialSeq+1)
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}
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// Create a new instance, it should reload the sequence number.
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// The number increases just after that because a new record is
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// created without the "x" entry.
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ln2 := NewLocalNode(db, ln.key)
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if s := ln2.Node().Seq(); s != initialSeq+2 {
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t.Fatalf("wrong seq %d on new instance, want %d", s, initialSeq+2)
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}
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finalSeq := ln2.Node().Seq()
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// Create a new instance with a different node key on the same database.
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// This should reset the sequence number.
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key, _ := crypto.GenerateKey()
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ln3 := NewLocalNode(db, key)
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if s := ln3.Node().Seq(); s < finalSeq {
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t.Fatalf("wrong seq %d on instance with changed key, want >= %d", s, finalSeq)
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}
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}
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// This test checks behavior of the endpoint predictor.
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func TestLocalNodeEndpoint(t *testing.T) {
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var (
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fallback = &net.UDPAddr{IP: net.IP{127, 0, 0, 1}, Port: 80}
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predicted = &net.UDPAddr{IP: net.IP{127, 0, 1, 2}, Port: 81}
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staticIP = net.IP{127, 0, 1, 2}
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)
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ln, db := newLocalNodeForTesting()
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defer db.Close()
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// Nothing is set initially.
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assert.Equal(t, net.IP(nil), ln.Node().IP())
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assert.Equal(t, 0, ln.Node().UDP())
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initialSeq := ln.Node().Seq()
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// Set up fallback address.
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ln.SetFallbackIP(fallback.IP)
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ln.SetFallbackUDP(fallback.Port)
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assert.Equal(t, fallback.IP, ln.Node().IP())
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assert.Equal(t, fallback.Port, ln.Node().UDP())
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assert.Equal(t, initialSeq+1, ln.Node().Seq())
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// Add endpoint statements from random hosts.
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for i := 0; i < iptrackMinStatements; i++ {
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assert.Equal(t, fallback.IP, ln.Node().IP())
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assert.Equal(t, fallback.Port, ln.Node().UDP())
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assert.Equal(t, initialSeq+1, ln.Node().Seq())
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from := &net.UDPAddr{IP: make(net.IP, 4), Port: 90}
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rand.Read(from.IP)
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ln.UDPEndpointStatement(from, predicted)
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}
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assert.Equal(t, predicted.IP, ln.Node().IP())
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assert.Equal(t, predicted.Port, ln.Node().UDP())
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assert.Equal(t, initialSeq+2, ln.Node().Seq())
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// Static IP overrides prediction.
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ln.SetStaticIP(staticIP)
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assert.Equal(t, staticIP, ln.Node().IP())
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assert.Equal(t, fallback.Port, ln.Node().UDP())
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assert.Equal(t, initialSeq+3, ln.Node().Seq())
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}
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