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wip addrbook

This commit is contained in:
Ethan Buchman 2018-01-20 19:12:04 -05:00
parent 930fde056a
commit 03550c7076
7 changed files with 368 additions and 206 deletions
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289
p2p/addrbook.go → p2p/addrbook/addrbook.go
View File

@ -2,17 +2,15 @@
// Originally Copyright (c) 2013-2014 Conformal Systems LLC.
// https://github.com/conformal/btcd/blob/master/LICENSE
package p2p
package addrbook
import (
"crypto/sha256"
"encoding/binary"
"encoding/json"
"fmt"
"math"
"math/rand"
"net"
"os"
"sync"
"time"
@ -20,65 +18,39 @@ import (
cmn "github.com/tendermint/tmlibs/common"
)
const (
// addresses under which the address manager will claim to need more addresses.
needAddressThreshold = 1000
// interval used to dump the address cache to disk for future use.
dumpAddressInterval = time.Minute * 2
// max addresses in each old address bucket.
oldBucketSize = 64
// buckets we split old addresses over.
oldBucketCount = 64
// max addresses in each new address bucket.
newBucketSize = 64
// buckets that we spread new addresses over.
newBucketCount = 256
// old buckets over which an address group will be spread.
oldBucketsPerGroup = 4
// new buckets over which a source address group will be spread.
newBucketsPerGroup = 32
// buckets a frequently seen new address may end up in.
maxNewBucketsPerAddress = 4
// days before which we assume an address has vanished
// if we have not seen it announced in that long.
numMissingDays = 30
// tries without a single success before we assume an address is bad.
numRetries = 3
// max failures we will accept without a success before considering an address bad.
maxFailures = 10
// days since the last success before we will consider evicting an address.
minBadDays = 7
// % of total addresses known returned by GetSelection.
getSelectionPercent = 23
// min addresses that must be returned by GetSelection. Useful for bootstrapping.
minGetSelection = 32
// max addresses returned by GetSelection
// NOTE: this must match "maxPexMessageSize"
maxGetSelection = 250
)
const (
bucketTypeNew = 0x01
bucketTypeOld = 0x02
)
// AddrBook - concurrency safe peer address manager.
type AddrBook struct {
// AddrBook is an address book used for tracking peers
// so we can gossip about them to others and select
// peers to dial.
type AddrBook interface {
cmn.Service
// Add and remove an address
AddAddress(addr *NetAddress, src *NetAddress)
RemoveAddress(addr *NetAddress)
// Do we need more peers?
NeedMoreAddrs() bool
// Pick an address to dial
PickAddress(newBias int) *NetAddress
// Mark address
MarkGood(*NetAddress)
MarkAttempt(*Address)
MarkBad(*NetAddress)
// Send a selection of addresses to peers
GetSelection() []*NetAddress
}
// addrBook - concurrency safe peer address manager.
// Implements AddrBook.
type addrBook struct {
cmn.BaseService
// immutable after creation
@ -101,7 +73,7 @@ type AddrBook struct {
// NewAddrBook creates a new address book.
// Use Start to begin processing asynchronous address updates.
func NewAddrBook(filePath string, routabilityStrict bool) *AddrBook {
func NewAddrBook(filePath string, routabilityStrict bool) *addrBook {
am := &AddrBook{
rand: rand.New(rand.NewSource(time.Now().UnixNano())),
ourAddrs: make(map[string]*NetAddress),
@ -114,8 +86,9 @@ func NewAddrBook(filePath string, routabilityStrict bool) *AddrBook {
return am
}
// Initialize the buckets.
// When modifying this, don't forget to update loadFromFile()
func (a *AddrBook) init() {
func (a *addrBook) init() {
a.key = crypto.CRandHex(24) // 24/2 * 8 = 96 bits
// New addr buckets
a.bucketsNew = make([]map[string]*knownAddress, newBucketCount)
@ -130,7 +103,7 @@ func (a *AddrBook) init() {
}
// OnStart implements Service.
func (a *AddrBook) OnStart() error {
func (a *addrBook) OnStart() error {
if err := a.BaseService.OnStart(); err != nil {
return err
}
@ -145,11 +118,11 @@ func (a *AddrBook) OnStart() error {
}
// OnStop implements Service.
func (a *AddrBook) OnStop() {
func (a *addrBook) OnStop() {
a.BaseService.OnStop()
}
func (a *AddrBook) Wait() {
func (a *addrBook) Wait() {
a.wg.Wait()
}
@ -161,46 +134,40 @@ func (a *AddrBook) AddOurAddress(addr *NetAddress) {
a.ourAddrs[addr.String()] = addr
}
// OurAddresses returns a list of our addresses.
func (a *AddrBook) OurAddresses() []*NetAddress {
addrs := []*NetAddress{}
for _, addr := range a.ourAddrs {
addrs = append(addrs, addr)
}
return addrs
}
//-------------------------------------------------------
// AddAddress adds the given address as received from the given source.
// AddAddress implements AddrBook - adds the given address as received from the given source.
// NOTE: addr must not be nil
func (a *AddrBook) AddAddress(addr *NetAddress, src *NetAddress) error {
func (a *addrBook) AddAddress(addr *NetAddress, src *NetAddress) error {
a.mtx.Lock()
defer a.mtx.Unlock()
return a.addAddress(addr, src)
}
// NeedMoreAddrs returns true if there are not have enough addresses in the book.
func (a *AddrBook) NeedMoreAddrs() bool {
// RemoveAddress implements AddrBook - removes the address from the book.
func (a *addrBook) RemoveAddress(addr *NetAddress) {
a.mtx.Lock()
defer a.mtx.Unlock()
ka := a.addrLookup[addr.ID]
if ka == nil {
return
}
a.Logger.Info("Remove address from book", "addr", ka.Addr, "ID", ka.ID)
a.removeFromAllBuckets(ka)
}
// NeedMoreAddrs implements AddrBook - returns true if there are not have enough addresses in the book.
func (a *addrBook) NeedMoreAddrs() bool {
return a.Size() < needAddressThreshold
}
// Size returns the number of addresses in the book.
func (a *AddrBook) Size() int {
a.mtx.Lock()
defer a.mtx.Unlock()
return a.size()
}
func (a *AddrBook) size() int {
return a.nNew + a.nOld
}
// PickAddress picks an address to connect to.
// PickAddress implements AddrBook. It picks an address to connect to.
// The address is picked randomly from an old or new bucket according
// to the newBias argument, which must be between [0, 100] (or else is truncated to that range)
// and determines how biased we are to pick an address from a new bucket.
// PickAddress returns nil if the AddrBook is empty or if we try to pick
// from an empty bucket.
func (a *AddrBook) PickAddress(newBias int) *NetAddress {
func (a *addrBook) PickAddress(newBias int) *NetAddress {
a.mtx.Lock()
defer a.mtx.Unlock()
@ -244,9 +211,9 @@ func (a *AddrBook) PickAddress(newBias int) *NetAddress {
return nil
}
// MarkGood marks the peer as good and moves it into an "old" bucket.
// TODO: call this from somewhere
func (a *AddrBook) MarkGood(addr *NetAddress) {
// MarkGood implements AddrBook - it marks the peer as good and
// moves it into an "old" bucket.
func (a *addrBook) MarkGood(addr *NetAddress) {
a.mtx.Lock()
defer a.mtx.Unlock()
ka := a.addrLookup[addr.ID]
@ -259,8 +226,8 @@ func (a *AddrBook) MarkGood(addr *NetAddress) {
}
}
// MarkAttempt marks that an attempt was made to connect to the address.
func (a *AddrBook) MarkAttempt(addr *NetAddress) {
// MarkAttempt implements AddrBook - it marks that an attempt was made to connect to the address.
func (a *addrBook) MarkAttempt(addr *NetAddress) {
a.mtx.Lock()
defer a.mtx.Unlock()
ka := a.addrLookup[addr.ID]
@ -270,28 +237,15 @@ func (a *AddrBook) MarkAttempt(addr *NetAddress) {
ka.markAttempt()
}
// MarkBad currently just ejects the address. In the future, consider
// blacklisting.
func (a *AddrBook) MarkBad(addr *NetAddress) {
// MarkBad implements AddrBook. Currently it just ejects the address.
// TODO: black list for some amount of time
func (a *addrBook) MarkBad(addr *NetAddress) {
a.RemoveAddress(addr)
}
// RemoveAddress removes the address from the book.
func (a *AddrBook) RemoveAddress(addr *NetAddress) {
a.mtx.Lock()
defer a.mtx.Unlock()
ka := a.addrLookup[addr.ID]
if ka == nil {
return
}
a.Logger.Info("Remove address from book", "addr", ka.Addr, "ID", ka.ID)
a.removeFromAllBuckets(ka)
}
/* Peer exchange */
// GetSelection randomly selects some addresses (old & new). Suitable for peer-exchange protocols.
func (a *AddrBook) GetSelection() []*NetAddress {
// GetSelection implements AddrBook.
// It randomly selects some addresses (old & new). Suitable for peer-exchange protocols.
func (a *addrBook) GetSelection() []*NetAddress {
a.mtx.Lock()
defer a.mtx.Unlock()
@ -336,18 +290,6 @@ func (a *AddrBook) ListOfKnownAddresses() []*knownAddress {
return addrs
}
func (ka *knownAddress) copy() *knownAddress {
return &knownAddress{
Addr: ka.Addr,
Src: ka.Src,
Attempts: ka.Attempts,
LastAttempt: ka.LastAttempt,
LastSuccess: ka.LastSuccess,
BucketType: ka.BucketType,
Buckets: ka.Buckets,
}
}
/* Loading & Saving */
type addrBookJSON struct {
@ -357,81 +299,24 @@ type addrBookJSON struct {
func (a *AddrBook) saveToFile(filePath string) {
a.Logger.Info("Saving AddrBook to file", "size", a.Size())
}
//------------------------------------------------
// Size returns the number of addresses in the book.
func (a *addrBook) Size() int {
a.mtx.Lock()
defer a.mtx.Unlock()
// Compile Addrs
addrs := []*knownAddress{}
for _, ka := range a.addrLookup {
addrs = append(addrs, ka)
}
aJSON := &addrBookJSON{
Key: a.key,
Addrs: addrs,
}
jsonBytes, err := json.MarshalIndent(aJSON, "", "\t")
if err != nil {
a.Logger.Error("Failed to save AddrBook to file", "err", err)
return
}
err = cmn.WriteFileAtomic(filePath, jsonBytes, 0644)
if err != nil {
a.Logger.Error("Failed to save AddrBook to file", "file", filePath, "err", err)
}
return a.size()
}
// Returns false if file does not exist.
// cmn.Panics if file is corrupt.
func (a *AddrBook) loadFromFile(filePath string) bool {
// If doesn't exist, do nothing.
_, err := os.Stat(filePath)
if os.IsNotExist(err) {
return false
}
// Load addrBookJSON{}
r, err := os.Open(filePath)
if err != nil {
cmn.PanicCrisis(cmn.Fmt("Error opening file %s: %v", filePath, err))
}
defer r.Close() // nolint: errcheck
aJSON := &addrBookJSON{}
dec := json.NewDecoder(r)
err = dec.Decode(aJSON)
if err != nil {
cmn.PanicCrisis(cmn.Fmt("Error reading file %s: %v", filePath, err))
}
// Restore all the fields...
// Restore the key
a.key = aJSON.Key
// Restore .bucketsNew & .bucketsOld
for _, ka := range aJSON.Addrs {
for _, bucketIndex := range ka.Buckets {
bucket := a.getBucket(ka.BucketType, bucketIndex)
bucket[ka.Addr.String()] = ka
}
a.addrLookup[ka.ID()] = ka
if ka.BucketType == bucketTypeNew {
a.nNew++
} else {
a.nOld++
}
}
return true
func (a *addrBook) size() int {
return a.nNew + a.nOld
}
// Save saves the book.
func (a *AddrBook) Save() {
a.Logger.Info("Saving AddrBook to file", "size", a.Size())
a.saveToFile(a.filePath)
}
//----------------------------------------------------------
/* Private methods */
func (a *AddrBook) saveRoutine() {
func (a *addrBook) saveRoutine() {
defer a.wg.Done()
saveFileTicker := time.NewTicker(dumpAddressInterval)
@ -449,7 +334,7 @@ out:
a.Logger.Info("Address handler done")
}
func (a *AddrBook) getBucket(bucketType byte, bucketIdx int) map[string]*knownAddress {
func (a *addrBook) getBucket(bucketType byte, bucketIdx int) map[string]*knownAddress {
switch bucketType {
case bucketTypeNew:
return a.bucketsNew[bucketIdx]
@ -463,7 +348,7 @@ func (a *AddrBook) getBucket(bucketType byte, bucketIdx int) map[string]*knownAd
// Adds ka to new bucket. Returns false if it couldn't do it cuz buckets full.
// NOTE: currently it always returns true.
func (a *AddrBook) addToNewBucket(ka *knownAddress, bucketIdx int) bool {
func (a *addrBook) addToNewBucket(ka *knownAddress, bucketIdx int) bool {
// Sanity check
if ka.isOld() {
a.Logger.Error(cmn.Fmt("Cannot add address already in old bucket to a new bucket: %v", ka))
@ -497,7 +382,7 @@ func (a *AddrBook) addToNewBucket(ka *knownAddress, bucketIdx int) bool {
}
// Adds ka to old bucket. Returns false if it couldn't do it cuz buckets full.
func (a *AddrBook) addToOldBucket(ka *knownAddress, bucketIdx int) bool {
func (a *addrBook) addToOldBucket(ka *knownAddress, bucketIdx int) bool {
// Sanity check
if ka.isNew() {
a.Logger.Error(cmn.Fmt("Cannot add new address to old bucket: %v", ka))
@ -533,7 +418,7 @@ func (a *AddrBook) addToOldBucket(ka *knownAddress, bucketIdx int) bool {
return true
}
func (a *AddrBook) removeFromBucket(ka *knownAddress, bucketType byte, bucketIdx int) {
func (a *addrBook) removeFromBucket(ka *knownAddress, bucketType byte, bucketIdx int) {
if ka.BucketType != bucketType {
a.Logger.Error(cmn.Fmt("Bucket type mismatch: %v", ka))
return
@ -550,7 +435,7 @@ func (a *AddrBook) removeFromBucket(ka *knownAddress, bucketType byte, bucketIdx
}
}
func (a *AddrBook) removeFromAllBuckets(ka *knownAddress) {
func (a *addrBook) removeFromAllBuckets(ka *knownAddress) {
for _, bucketIdx := range ka.Buckets {
bucket := a.getBucket(ka.BucketType, bucketIdx)
delete(bucket, ka.Addr.String())
@ -564,7 +449,7 @@ func (a *AddrBook) removeFromAllBuckets(ka *knownAddress) {
delete(a.addrLookup, ka.ID())
}
func (a *AddrBook) pickOldest(bucketType byte, bucketIdx int) *knownAddress {
func (a *addrBook) pickOldest(bucketType byte, bucketIdx int) *knownAddress {
bucket := a.getBucket(bucketType, bucketIdx)
var oldest *knownAddress
for _, ka := range bucket {
@ -575,7 +460,7 @@ func (a *AddrBook) pickOldest(bucketType byte, bucketIdx int) *knownAddress {
return oldest
}
func (a *AddrBook) addAddress(addr, src *NetAddress) error {
func (a *addrBook) addAddress(addr, src *NetAddress) error {
if a.routabilityStrict && !addr.Routable() {
return fmt.Errorf("Cannot add non-routable address %v", addr)
}
@ -613,7 +498,7 @@ func (a *AddrBook) addAddress(addr, src *NetAddress) error {
// Make space in the new buckets by expiring the really bad entries.
// If no bad entries are available we remove the oldest.
func (a *AddrBook) expireNew(bucketIdx int) {
func (a *addrBook) expireNew(bucketIdx int) {
for addrStr, ka := range a.bucketsNew[bucketIdx] {
// If an entry is bad, throw it away
if ka.isBad() {
@ -631,7 +516,7 @@ func (a *AddrBook) expireNew(bucketIdx int) {
// Promotes an address from new to old.
// TODO: Move to old probabilistically.
// The better a node is, the less likely it should be evicted from an old bucket.
func (a *AddrBook) moveToOld(ka *knownAddress) {
func (a *addrBook) moveToOld(ka *knownAddress) {
// Sanity check
if ka.isOld() {
a.Logger.Error(cmn.Fmt("Cannot promote address that is already old %v", ka))
@ -676,7 +561,7 @@ func (a *AddrBook) moveToOld(ka *knownAddress) {
// doublesha256( key + sourcegroup +
// int64(doublesha256(key + group + sourcegroup))%bucket_per_group ) % num_new_buckets
func (a *AddrBook) calcNewBucket(addr, src *NetAddress) int {
func (a *addrBook) calcNewBucket(addr, src *NetAddress) int {
data1 := []byte{}
data1 = append(data1, []byte(a.key)...)
data1 = append(data1, []byte(a.groupKey(addr))...)
@ -697,7 +582,7 @@ func (a *AddrBook) calcNewBucket(addr, src *NetAddress) int {
// doublesha256( key + group +
// int64(doublesha256(key + addr))%buckets_per_group ) % num_old_buckets
func (a *AddrBook) calcOldBucket(addr *NetAddress) int {
func (a *addrBook) calcOldBucket(addr *NetAddress) int {
data1 := []byte{}
data1 = append(data1, []byte(a.key)...)
data1 = append(data1, []byte(addr.String())...)
@ -719,7 +604,7 @@ func (a *AddrBook) calcOldBucket(addr *NetAddress) int {
// This is the /16 for IPv4, the /32 (/36 for he.net) for IPv6, the string
// "local" for a local address and the string "unroutable" for an unroutable
// address.
func (a *AddrBook) groupKey(na *NetAddress) string {
func (a *addrBook) groupKey(na *NetAddress) string {
if a.routabilityStrict && na.Local() {
return "local"
}

2
p2p/addrbook_test.go → p2p/addrbook/addrbook_test.go
View File

@ -1,4 +1,4 @@
package p2p
package addrbook
import (
"encoding/hex"

83
p2p/addrbook/file.go Normal file
View File

@ -0,0 +1,83 @@
package addrbook
import (
"encoding/json"
"os"
cmn "github.com/tendermint/tmlibs/common"
)
/* Loading & Saving */
type addrBookJSON struct {
Key string
Addrs []*knownAddress
}
func (a *addrBook) saveToFile(filePath string) {
a.Logger.Info("Saving AddrBook to file", "size", a.Size())
a.mtx.Lock()
defer a.mtx.Unlock()
// Compile Addrs
addrs := []*knownAddress{}
for _, ka := range a.addrLookup {
addrs = append(addrs, ka)
}
aJSON := &addrBookJSON{
Key: a.key,
Addrs: addrs,
}
jsonBytes, err := json.MarshalIndent(aJSON, "", "\t")
if err != nil {
a.Logger.Error("Failed to save AddrBook to file", "err", err)
return
}
err = cmn.WriteFileAtomic(filePath, jsonBytes, 0644)
if err != nil {
a.Logger.Error("Failed to save AddrBook to file", "file", filePath, "err", err)
}
}
// Returns false if file does not exist.
// cmn.Panics if file is corrupt.
func (a *addrBook) loadFromFile(filePath string) bool {
// If doesn't exist, do nothing.
_, err := os.Stat(filePath)
if os.IsNotExist(err) {
return false
}
// Load addrBookJSON{}
r, err := os.Open(filePath)
if err != nil {
cmn.PanicCrisis(cmn.Fmt("Error opening file %s: %v", filePath, err))
}
defer r.Close() // nolint: errcheck
aJSON := &addrBookJSON{}
dec := json.NewDecoder(r)
err = dec.Decode(aJSON)
if err != nil {
cmn.PanicCrisis(cmn.Fmt("Error reading file %s: %v", filePath, err))
}
// Restore all the fields...
// Restore the key
a.key = aJSON.Key
// Restore .bucketsNew & .bucketsOld
for _, ka := range aJSON.Addrs {
for _, bucketIndex := range ka.Buckets {
bucket := a.getBucket(ka.BucketType, bucketIndex)
bucket[ka.Addr.String()] = ka
}
a.addrLookup[ka.ID()] = ka
if ka.BucketType == bucketTypeNew {
a.nNew++
} else {
a.nOld++
}
}
return true
}

138
p2p/addrbook/known_address.go Normal file
View File

@ -0,0 +1,138 @@
package addrbook
import "time"
// knownAddress tracks information about a known network address
// that is used to determine how viable an address is.
type knownAddress struct {
Addr *NetAddress
Src *NetAddress
Attempts int32
LastAttempt time.Time
LastSuccess time.Time
BucketType byte
Buckets []int
}
func newKnownAddress(addr *NetAddress, src *NetAddress) *knownAddress {
return &knownAddress{
Addr: addr,
Src: src,
Attempts: 0,
LastAttempt: time.Now(),
BucketType: bucketTypeNew,
Buckets: nil,
}
}
func (ka *knownAddress) ID() ID {
return ka.Addr.ID
}
func (ka *knownAddress) copy() *knownAddress {
return &knownAddress{
Addr: ka.Addr,
Src: ka.Src,
Attempts: ka.Attempts,
LastAttempt: ka.LastAttempt,
LastSuccess: ka.LastSuccess,
BucketType: ka.BucketType,
Buckets: ka.Buckets,
}
}
func (ka *knownAddress) isOld() bool {
return ka.BucketType == bucketTypeOld
}
func (ka *knownAddress) isNew() bool {
return ka.BucketType == bucketTypeNew
}
func (ka *knownAddress) markAttempt() {
now := time.Now()
ka.LastAttempt = now
ka.Attempts += 1
}
func (ka *knownAddress) markGood() {
now := time.Now()
ka.LastAttempt = now
ka.Attempts = 0
ka.LastSuccess = now
}
func (ka *knownAddress) addBucketRef(bucketIdx int) int {
for _, bucket := range ka.Buckets {
if bucket == bucketIdx {
// TODO refactor to return error?
// log.Warn(Fmt("Bucket already exists in ka.Buckets: %v", ka))
return -1
}
}
ka.Buckets = append(ka.Buckets, bucketIdx)
return len(ka.Buckets)
}
func (ka *knownAddress) removeBucketRef(bucketIdx int) int {
buckets := []int{}
for _, bucket := range ka.Buckets {
if bucket != bucketIdx {
buckets = append(buckets, bucket)
}
}
if len(buckets) != len(ka.Buckets)-1 {
// TODO refactor to return error?
// log.Warn(Fmt("bucketIdx not found in ka.Buckets: %v", ka))
return -1
}
ka.Buckets = buckets
return len(ka.Buckets)
}
/*
An address is bad if the address in question is a New address, has not been tried in the last
minute, and meets one of the following criteria:
1) It claims to be from the future
2) It hasn't been seen in over a week
3) It has failed at least three times and never succeeded
4) It has failed ten times in the last week
All addresses that meet these criteria are assumed to be worthless and not
worth keeping hold of.
XXX: so a good peer needs us to call MarkGood before the conditions above are reached!
*/
func (ka *knownAddress) isBad() bool {
// Is Old --> good
if ka.BucketType == bucketTypeOld {
return false
}
// Has been attempted in the last minute --> good
if ka.LastAttempt.Before(time.Now().Add(-1 * time.Minute)) {
return false
}
// Too old?
// XXX: does this mean if we've kept a connection up for this long we'll disconnect?!
// and shouldn't it be .Before ?
if ka.LastAttempt.After(time.Now().Add(-1 * numMissingDays * time.Hour * 24)) {
return true
}
// Never succeeded?
if ka.LastSuccess.IsZero() && ka.Attempts >= numRetries {
return true
}
// Hasn't succeeded in too long?
// XXX: does this mean if we've kept a connection up for this long we'll disconnect?!
if ka.LastSuccess.Before(time.Now().Add(-1*minBadDays*time.Hour*24)) &&
ka.Attempts >= maxFailures {
return true
}
return false
}

55
p2p/addrbook/params.go Normal file
View File

@ -0,0 +1,55 @@
package addrbook
import "time"
const (
// addresses under which the address manager will claim to need more addresses.
needAddressThreshold = 1000
// interval used to dump the address cache to disk for future use.
dumpAddressInterval = time.Minute * 2
// max addresses in each old address bucket.
oldBucketSize = 64
// buckets we split old addresses over.
oldBucketCount = 64
// max addresses in each new address bucket.
newBucketSize = 64
// buckets that we spread new addresses over.
newBucketCount = 256
// old buckets over which an address group will be spread.
oldBucketsPerGroup = 4
// new buckets over which a source address group will be spread.
newBucketsPerGroup = 32
// buckets a frequently seen new address may end up in.
maxNewBucketsPerAddress = 4
// days before which we assume an address has vanished
// if we have not seen it announced in that long.
numMissingDays = 7
// tries without a single success before we assume an address is bad.
numRetries = 3
// max failures we will accept without a success before considering an address bad.
maxFailures = 10 // ?
// days since the last success before we will consider evicting an address.
minBadDays = 7
// % of total addresses known returned by GetSelection.
getSelectionPercent = 23
// min addresses that must be returned by GetSelection. Useful for bootstrapping.
minGetSelection = 32
// max addresses returned by GetSelection
// NOTE: this must match "maxPexMessageSize"
maxGetSelection = 250
)

6
p2p/pex_reactor.go
View File

@ -11,6 +11,8 @@ import (
"github.com/pkg/errors"
wire "github.com/tendermint/go-wire"
cmn "github.com/tendermint/tmlibs/common"
"github.com/tendermint/tendermint/p2p/addrbook"
)
const (
@ -47,7 +49,7 @@ const (
type PEXReactor struct {
BaseReactor
book *AddrBook
book *addrbook.AddrBook
config *PEXReactorConfig
ensurePeersPeriod time.Duration
@ -67,7 +69,7 @@ type PEXReactorConfig struct {
}
// NewPEXReactor creates new PEX reactor.
func NewPEXReactor(b *AddrBook, config *PEXReactorConfig) *PEXReactor {
func NewPEXReactor(b *addrbook.AddrBook, config *PEXReactorConfig) *PEXReactor {
r := &PEXReactor{
book: b,
config: config,

1
p2p/switch.go
View File

@ -332,7 +332,6 @@ func (sw *Switch) DialPeersAsync(addrBook *AddrBook, peers []string, persistent
}
addrBook.AddAddress(netAddr, ourAddr)
}
addrBook.Save()
}
// permute the list, dial them in random order.