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638 lines
17 KiB
638 lines
17 KiB
package pex
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import (
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"math"
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"os"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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cmn "github.com/tendermint/tendermint/libs/common"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/libs/rand"
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"github.com/tendermint/tendermint/p2p"
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)
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func TestAddrBookPickAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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// 0 addresses
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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assert.Zero(t, book.Size())
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addr := book.PickAddress(50)
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assert.Nil(t, addr, "expected no address")
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randAddrs := randNetAddressPairs(t, 1)
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addrSrc := randAddrs[0]
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book.AddAddress(addrSrc.addr, addrSrc.src)
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// pick an address when we only have new address
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addr = book.PickAddress(0)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(50)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(100)
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assert.NotNil(t, addr, "expected an address")
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// pick an address when we only have old address
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book.MarkGood(addrSrc.addr.ID)
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addr = book.PickAddress(0)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(50)
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assert.NotNil(t, addr, "expected an address")
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// in this case, nNew==0 but we biased 100% to new, so we return nil
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addr = book.PickAddress(100)
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assert.Nil(t, addr, "did not expected an address")
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}
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func TestAddrBookSaveLoad(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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// 0 addresses
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.saveToFile(fname)
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book = NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.loadFromFile(fname)
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assert.Zero(t, book.Size())
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// 100 addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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assert.Equal(t, 100, book.Size())
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book.saveToFile(fname)
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book = NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.loadFromFile(fname)
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assert.Equal(t, 100, book.Size())
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}
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func TestAddrBookLookup(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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randAddrs := randNetAddressPairs(t, 100)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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for _, addrSrc := range randAddrs {
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addr := addrSrc.addr
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src := addrSrc.src
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book.AddAddress(addr, src)
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ka := book.addrLookup[addr.ID]
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assert.NotNil(t, ka, "Expected to find KnownAddress %v but wasn't there.", addr)
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if !(ka.Addr.Equals(addr) && ka.Src.Equals(src)) {
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t.Fatalf("KnownAddress doesn't match addr & src")
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}
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}
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}
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func TestAddrBookPromoteToOld(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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randAddrs := randNetAddressPairs(t, 100)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// Attempt all addresses.
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for _, addrSrc := range randAddrs {
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book.MarkAttempt(addrSrc.addr)
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}
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// Promote half of them
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for i, addrSrc := range randAddrs {
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if i%2 == 0 {
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book.MarkGood(addrSrc.addr.ID)
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}
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}
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// TODO: do more testing :)
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selection := book.GetSelection()
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t.Logf("selection: %v", selection)
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if len(selection) > book.Size() {
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t.Errorf("selection could not be bigger than the book")
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}
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selection = book.GetSelectionWithBias(30)
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t.Logf("selection: %v", selection)
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if len(selection) > book.Size() {
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t.Errorf("selection with bias could not be bigger than the book")
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}
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assert.Equal(t, book.Size(), 100, "expecting book size to be 100")
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}
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func TestAddrBookHandlesDuplicates(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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randAddrs := randNetAddressPairs(t, 100)
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differentSrc := randIPv4Address(t)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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book.AddAddress(addrSrc.addr, addrSrc.src) // duplicate
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book.AddAddress(addrSrc.addr, differentSrc) // different src
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}
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assert.Equal(t, 100, book.Size())
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}
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type netAddressPair struct {
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addr *p2p.NetAddress
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src *p2p.NetAddress
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}
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func randNetAddressPairs(t *testing.T, n int) []netAddressPair {
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randAddrs := make([]netAddressPair, n)
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for i := 0; i < n; i++ {
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randAddrs[i] = netAddressPair{addr: randIPv4Address(t), src: randIPv4Address(t)}
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}
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return randAddrs
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}
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func randIPv4Address(t *testing.T) *p2p.NetAddress {
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for {
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ip := fmt.Sprintf("%v.%v.%v.%v",
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rand.RandIntn(254)+1,
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rand.RandIntn(255),
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rand.RandIntn(255),
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rand.RandIntn(255),
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)
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port := rand.RandIntn(65535-1) + 1
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id := p2p.ID(hex.EncodeToString(rand.RandBytes(p2p.IDByteLength)))
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idAddr := p2p.IDAddressString(id, fmt.Sprintf("%v:%v", ip, port))
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addr, err := p2p.NewNetAddressString(idAddr)
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assert.Nil(t, err, "error generating rand network address")
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if addr.Routable() {
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return addr
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}
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}
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}
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func TestAddrBookRemoveAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.Equal(t, 1, book.Size())
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book.RemoveAddress(addr)
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assert.Equal(t, 0, book.Size())
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nonExistingAddr := randIPv4Address(t)
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book.RemoveAddress(nonExistingAddr)
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assert.Equal(t, 0, book.Size())
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}
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func TestAddrBookGetSelectionWithOneMarkedGood(t *testing.T) {
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// create a book with 10 addresses, 1 good/old and 9 new
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book, fname := createAddrBookWithMOldAndNNewAddrs(t, 1, 9)
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defer deleteTempFile(fname)
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addrs := book.GetSelectionWithBias(biasToSelectNewPeers)
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assert.NotNil(t, addrs)
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assertMOldAndNNewAddrsInSelection(t, 1, 9, addrs, book)
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}
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func TestAddrBookGetSelectionWithOneNotMarkedGood(t *testing.T) {
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// create a book with 10 addresses, 9 good/old and 1 new
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book, fname := createAddrBookWithMOldAndNNewAddrs(t, 9, 1)
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defer deleteTempFile(fname)
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addrs := book.GetSelectionWithBias(biasToSelectNewPeers)
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assert.NotNil(t, addrs)
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assertMOldAndNNewAddrsInSelection(t, 9, 1, addrs, book)
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}
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func TestAddrBookGetSelectionReturnsNilWhenAddrBookIsEmpty(t *testing.T) {
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book, fname := createAddrBookWithMOldAndNNewAddrs(t, 0, 0)
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defer deleteTempFile(fname)
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addrs := book.GetSelectionWithBias(biasToSelectNewPeers)
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assert.Nil(t, addrs)
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}
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func TestAddrBookGetSelection(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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// 1) empty book
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assert.Empty(t, book.GetSelection())
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// 2) add one address
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.Equal(t, 1, len(book.GetSelection()))
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assert.Equal(t, addr, book.GetSelection()[0])
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// 3) add a bunch of addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// check there is no duplicates
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addrs := make(map[string]*p2p.NetAddress)
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selection := book.GetSelection()
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for _, addr := range selection {
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if dup, ok := addrs[addr.String()]; ok {
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t.Fatalf("selection %v contains duplicates %v", selection, dup)
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}
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addrs[addr.String()] = addr
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}
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if len(selection) > book.Size() {
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t.Errorf("selection %v could not be bigger than the book", selection)
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}
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}
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func TestAddrBookGetSelectionWithBias(t *testing.T) {
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const biasTowardsNewAddrs = 30
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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// 1) empty book
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selection := book.GetSelectionWithBias(biasTowardsNewAddrs)
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assert.Empty(t, selection)
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// 2) add one address
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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assert.Equal(t, 1, len(selection))
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assert.Equal(t, addr, selection[0])
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// 3) add a bunch of addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// check there is no duplicates
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addrs := make(map[string]*p2p.NetAddress)
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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for _, addr := range selection {
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if dup, ok := addrs[addr.String()]; ok {
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t.Fatalf("selection %v contains duplicates %v", selection, dup)
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}
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addrs[addr.String()] = addr
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}
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if len(selection) > book.Size() {
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t.Fatalf("selection %v could not be bigger than the book", selection)
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}
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// 4) mark 80% of the addresses as good
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randAddrsLen := len(randAddrs)
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for i, addrSrc := range randAddrs {
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if int((float64(i)/float64(randAddrsLen))*100) >= 20 {
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book.MarkGood(addrSrc.addr.ID)
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}
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}
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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// check that ~70% of addresses returned are good
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good := 0
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for _, addr := range selection {
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if book.IsGood(addr) {
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good++
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}
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}
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got, expected := int((float64(good)/float64(len(selection)))*100), (100 - biasTowardsNewAddrs)
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// compute some slack to protect against small differences due to rounding:
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slack := int(math.Round(float64(100) / float64(len(selection))))
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if got > expected+slack {
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t.Fatalf(
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"got more good peers (%% got: %d, %% expected: %d, number of good addrs: %d, total: %d)",
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got,
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expected,
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good,
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len(selection),
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)
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}
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if got < expected-slack {
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t.Fatalf(
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"got fewer good peers (%% got: %d, %% expected: %d, number of good addrs: %d, total: %d)",
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got,
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expected,
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good,
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len(selection),
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)
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}
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}
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func TestAddrBookHasAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.True(t, book.HasAddress(addr))
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book.RemoveAddress(addr)
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assert.False(t, book.HasAddress(addr))
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}
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func testCreatePrivateAddrs(t *testing.T, numAddrs int) ([]*p2p.NetAddress, []string) {
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addrs := make([]*p2p.NetAddress, numAddrs)
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for i := 0; i < numAddrs; i++ {
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addrs[i] = randIPv4Address(t)
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}
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private := make([]string, numAddrs)
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for i, addr := range addrs {
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private[i] = string(addr.ID)
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}
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return addrs, private
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}
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func TestAddrBookEmpty(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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// Check that empty book is empty
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require.True(t, book.Empty())
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// Check that book with our address is empty
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book.AddOurAddress(randIPv4Address(t))
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require.True(t, book.Empty())
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// Check that book with private addrs is empty
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_, privateIds := testCreatePrivateAddrs(t, 5)
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book.AddPrivateIDs(privateIds)
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require.True(t, book.Empty())
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// Check that book with address is not empty
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book.AddAddress(randIPv4Address(t), randIPv4Address(t))
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require.False(t, book.Empty())
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}
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func TestPrivatePeers(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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addrs, private := testCreatePrivateAddrs(t, 10)
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book.AddPrivateIDs(private)
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// private addrs must not be added
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for _, addr := range addrs {
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err := book.AddAddress(addr, addr)
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if assert.Error(t, err) {
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_, ok := err.(ErrAddrBookPrivate)
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assert.True(t, ok)
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}
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}
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// addrs coming from private peers must not be added
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err := book.AddAddress(randIPv4Address(t), addrs[0])
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if assert.Error(t, err) {
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_, ok := err.(ErrAddrBookPrivateSrc)
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assert.True(t, ok)
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}
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}
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func testAddrBookAddressSelection(t *testing.T, bookSize int) {
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// generate all combinations of old (m) and new addresses
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for nBookOld := 0; nBookOld <= bookSize; nBookOld++ {
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nBookNew := bookSize - nBookOld
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dbgStr := fmt.Sprintf("book of size %d (new %d, old %d)", bookSize, nBookNew, nBookOld)
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// create book and get selection
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book, fname := createAddrBookWithMOldAndNNewAddrs(t, nBookOld, nBookNew)
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defer deleteTempFile(fname)
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addrs := book.GetSelectionWithBias(biasToSelectNewPeers)
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assert.NotNil(t, addrs, "%s - expected a non-nil selection", dbgStr)
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nAddrs := len(addrs)
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assert.NotZero(t, nAddrs, "%s - expected at least one address in selection", dbgStr)
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// check there's no nil addresses
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for _, addr := range addrs {
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if addr == nil {
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t.Fatalf("%s - got nil address in selection %v", dbgStr, addrs)
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}
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}
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// XXX: shadowing
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nOld, nNew := countOldAndNewAddrsInSelection(addrs, book)
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// Given:
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// n - num new addrs, m - num old addrs
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// k - num new addrs expected in the beginning (based on bias %)
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// i=min(n, max(k,r-m)), aka expNew
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// j=min(m, r-i), aka expOld
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//
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// We expect this layout:
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// indices: 0...i-1 i...i+j-1
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// addresses: N0..Ni-1 O0..Oj-1
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//
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// There is at least one partition and at most three.
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var (
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k = percentageOfNum(biasToSelectNewPeers, nAddrs)
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expNew = cmn.MinInt(nNew, cmn.MaxInt(k, nAddrs-nBookOld))
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expOld = cmn.MinInt(nOld, nAddrs-expNew)
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)
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// Verify that the number of old and new addresses are as expected
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if nNew != expNew {
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t.Fatalf("%s - expected new addrs %d, got %d", dbgStr, expNew, nNew)
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}
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if nOld != expOld {
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t.Fatalf("%s - expected old addrs %d, got %d", dbgStr, expOld, nOld)
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}
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// Verify that the order of addresses is as expected
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// Get the sequence types and lengths of the selection
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seqLens, seqTypes, err := analyseSelectionLayout(book, addrs)
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assert.NoError(t, err, "%s", dbgStr)
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// Build a list with the expected lengths of partitions and another with the expected types, e.g.:
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// expSeqLens = [10, 22], expSeqTypes = [1, 2]
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// means we expect 10 new (type 1) addresses followed by 22 old (type 2) addresses.
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var expSeqLens []int
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var expSeqTypes []int
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switch {
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case expOld == 0: // all new addresses
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|
expSeqLens = []int{nAddrs}
|
|
expSeqTypes = []int{1}
|
|
case expNew == 0: // all old addresses
|
|
expSeqLens = []int{nAddrs}
|
|
expSeqTypes = []int{2}
|
|
case nAddrs-expNew-expOld == 0: // new addresses, old addresses
|
|
expSeqLens = []int{expNew, expOld}
|
|
expSeqTypes = []int{1, 2}
|
|
}
|
|
|
|
assert.Equal(t, expSeqLens, seqLens,
|
|
"%s - expected sequence lengths of old/new %v, got %v",
|
|
dbgStr, expSeqLens, seqLens)
|
|
assert.Equal(t, expSeqTypes, seqTypes,
|
|
"%s - expected sequence types (1-new, 2-old) was %v, got %v",
|
|
dbgStr, expSeqTypes, seqTypes)
|
|
}
|
|
}
|
|
|
|
func TestMultipleAddrBookAddressSelection(t *testing.T) {
|
|
// test books with smaller size, < N
|
|
const N = 32
|
|
for bookSize := 1; bookSize < N; bookSize++ {
|
|
testAddrBookAddressSelection(t, bookSize)
|
|
}
|
|
|
|
// Test for two books with sizes from following ranges
|
|
ranges := [...][]int{{33, 100}, {100, 175}}
|
|
bookSizes := make([]int, 0, len(ranges))
|
|
for _, r := range ranges {
|
|
bookSizes = append(bookSizes, rand.RandIntn(r[1]-r[0])+r[0])
|
|
}
|
|
t.Logf("Testing address selection for the following book sizes %v\n", bookSizes)
|
|
for _, bookSize := range bookSizes {
|
|
testAddrBookAddressSelection(t, bookSize)
|
|
}
|
|
}
|
|
|
|
func assertMOldAndNNewAddrsInSelection(t *testing.T, m, n int, addrs []*p2p.NetAddress, book *addrBook) {
|
|
nOld, nNew := countOldAndNewAddrsInSelection(addrs, book)
|
|
assert.Equal(t, m, nOld, "old addresses")
|
|
assert.Equal(t, n, nNew, "new addresses")
|
|
}
|
|
|
|
func createTempFileName(prefix string) string {
|
|
f, err := ioutil.TempFile("", prefix)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
fname := f.Name()
|
|
err = f.Close()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return fname
|
|
}
|
|
|
|
func deleteTempFile(fname string) {
|
|
err := os.Remove(fname)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
func createAddrBookWithMOldAndNNewAddrs(t *testing.T, nOld, nNew int) (book *addrBook, fname string) {
|
|
fname = createTempFileName("addrbook_test")
|
|
|
|
book = NewAddrBook(fname, true)
|
|
book.SetLogger(log.TestingLogger())
|
|
assert.Zero(t, book.Size())
|
|
|
|
randAddrs := randNetAddressPairs(t, nOld)
|
|
for _, addr := range randAddrs {
|
|
book.AddAddress(addr.addr, addr.src)
|
|
book.MarkGood(addr.addr.ID)
|
|
}
|
|
|
|
randAddrs = randNetAddressPairs(t, nNew)
|
|
for _, addr := range randAddrs {
|
|
book.AddAddress(addr.addr, addr.src)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func countOldAndNewAddrsInSelection(addrs []*p2p.NetAddress, book *addrBook) (nOld, nNew int) {
|
|
for _, addr := range addrs {
|
|
if book.IsGood(addr) {
|
|
nOld++
|
|
} else {
|
|
nNew++
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// Analyse the layout of the selection specified by 'addrs'
|
|
// Returns:
|
|
// - seqLens - the lengths of the sequences of addresses of same type
|
|
// - seqTypes - the types of sequences in selection
|
|
func analyseSelectionLayout(book *addrBook, addrs []*p2p.NetAddress) (seqLens, seqTypes []int, err error) {
|
|
// address types are: 0 - nil, 1 - new, 2 - old
|
|
var (
|
|
prevType = 0
|
|
currentSeqLen = 0
|
|
)
|
|
|
|
for _, addr := range addrs {
|
|
addrType := 0
|
|
if book.IsGood(addr) {
|
|
addrType = 2
|
|
} else {
|
|
addrType = 1
|
|
}
|
|
if addrType != prevType && prevType != 0 {
|
|
seqLens = append(seqLens, currentSeqLen)
|
|
seqTypes = append(seqTypes, prevType)
|
|
currentSeqLen = 0
|
|
}
|
|
currentSeqLen++
|
|
prevType = addrType
|
|
}
|
|
|
|
seqLens = append(seqLens, currentSeqLen)
|
|
seqTypes = append(seqTypes, prevType)
|
|
|
|
return
|
|
}
|