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Merge branch 'develop' of github.com:ethereum/go-ethereum into develop

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This commit is contained in:
Daniel A. Nagy 2015-05-08 17:55:53 +02:00
commit 62dd9833ec
23 changed files with 1213 additions and 451 deletions
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4
Godeps/Godeps.json generated
View File

@ -98,6 +98,10 @@
"Comment": "v0.1.0-3-g27c4092",
"Rev": "27c40922c40b43fe04554d8223a402af3ea333f3"
},
{
"ImportPath": "gopkg.in/karalabe/cookiejar.v2/collections/prque",
"Rev": "0b2e270613f5d7ba262a5749b9e32270131497a2"
},
{
"ImportPath": "gopkg.in/qml.v1/cdata",
"Rev": "1116cb9cd8dee23f8d444ded354eb53122739f99"

44
Godeps/_workspace/src/gopkg.in/karalabe/cookiejar.v2/collections/prque/example_test.go generated vendored Normal file
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@ -0,0 +1,44 @@
// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox 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 General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
package prque_test
import (
"fmt"
"gopkg.in/karalabe/cookiejar.v2/collections/prque"
)
// Insert some data into a priority queue and pop them out in prioritized order.
func Example_usage() {
// Define some data to push into the priority queue
prio := []float32{77.7, 22.2, 44.4, 55.5, 11.1, 88.8, 33.3, 99.9, 0.0, 66.6}
data := []string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
// Create the priority queue and insert the prioritized data
pq := prque.New()
for i := 0; i < len(data); i++ {
pq.Push(data[i], prio[i])
}
// Pop out the data and print them
for !pq.Empty() {
val, prio := pq.Pop()
fmt.Printf("%.1f:%s ", prio, val)
}
// Output:
// 99.9:seven 88.8:five 77.7:zero 66.6:nine 55.5:three 44.4:two 33.3:six 22.2:one 11.1:four 0.0:eight
}

75
Godeps/_workspace/src/gopkg.in/karalabe/cookiejar.v2/collections/prque/prque.go generated vendored Normal file
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@ -0,0 +1,75 @@
// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox 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 General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
// Package prque implements a priority queue data structure supporting arbitrary
// value types and float priorities.
//
// The reasoning behind using floats for the priorities vs. ints or interfaces
// was larger flexibility without sacrificing too much performance or code
// complexity.
//
// If you would like to use a min-priority queue, simply negate the priorities.
//
// Internally the queue is based on the standard heap package working on a
// sortable version of the block based stack.
package prque
import (
"container/heap"
)
// Priority queue data structure.
type Prque struct {
cont *sstack
}
// Creates a new priority queue.
func New() *Prque {
return &Prque{newSstack()}
}
// Pushes a value with a given priority into the queue, expanding if necessary.
func (p *Prque) Push(data interface{}, priority float32) {
heap.Push(p.cont, &item{data, priority})
}
// Pops the value with the greates priority off the stack and returns it.
// Currently no shrinking is done.
func (p *Prque) Pop() (interface{}, float32) {
item := heap.Pop(p.cont).(*item)
return item.value, item.priority
}
// Pops only the item from the queue, dropping the associated priority value.
func (p *Prque) PopItem() interface{} {
return heap.Pop(p.cont).(*item).value
}
// Checks whether the priority queue is empty.
func (p *Prque) Empty() bool {
return p.cont.Len() == 0
}
// Returns the number of element in the priority queue.
func (p *Prque) Size() int {
return p.cont.Len()
}
// Clears the contents of the priority queue.
func (p *Prque) Reset() {
*p = *New()
}

139
Godeps/_workspace/src/gopkg.in/karalabe/cookiejar.v2/collections/prque/prque_test.go generated vendored Normal file
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@ -0,0 +1,139 @@
// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox 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 General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
package prque
import (
"math/rand"
"testing"
)
func TestPrque(t *testing.T) {
// Generate a batch of random data and a specific priority order
size := 16 * blockSize
prio := rand.Perm(size)
data := make([]int, size)
for i := 0; i < size; i++ {
data[i] = rand.Int()
}
queue := New()
for rep := 0; rep < 2; rep++ {
// Fill a priority queue with the above data
for i := 0; i < size; i++ {
queue.Push(data[i], float32(prio[i]))
if queue.Size() != i+1 {
t.Errorf("queue size mismatch: have %v, want %v.", queue.Size(), i+1)
}
}
// Create a map the values to the priorities for easier verification
dict := make(map[float32]int)
for i := 0; i < size; i++ {
dict[float32(prio[i])] = data[i]
}
// Pop out the elements in priority order and verify them
prevPrio := float32(size + 1)
for !queue.Empty() {
val, prio := queue.Pop()
if prio > prevPrio {
t.Errorf("invalid priority order: %v after %v.", prio, prevPrio)
}
prevPrio = prio
if val != dict[prio] {
t.Errorf("push/pop mismatch: have %v, want %v.", val, dict[prio])
}
delete(dict, prio)
}
}
}
func TestReset(t *testing.T) {
// Generate a batch of random data and a specific priority order
size := 16 * blockSize
prio := rand.Perm(size)
data := make([]int, size)
for i := 0; i < size; i++ {
data[i] = rand.Int()
}
queue := New()
for rep := 0; rep < 2; rep++ {
// Fill a priority queue with the above data
for i := 0; i < size; i++ {
queue.Push(data[i], float32(prio[i]))
if queue.Size() != i+1 {
t.Errorf("queue size mismatch: have %v, want %v.", queue.Size(), i+1)
}
}
// Create a map the values to the priorities for easier verification
dict := make(map[float32]int)
for i := 0; i < size; i++ {
dict[float32(prio[i])] = data[i]
}
// Pop out half the elements in priority order and verify them
prevPrio := float32(size + 1)
for i := 0; i < size/2; i++ {
val, prio := queue.Pop()
if prio > prevPrio {
t.Errorf("invalid priority order: %v after %v.", prio, prevPrio)
}
prevPrio = prio
if val != dict[prio] {
t.Errorf("push/pop mismatch: have %v, want %v.", val, dict[prio])
}
delete(dict, prio)
}
// Reset and ensure it's empty
queue.Reset()
if !queue.Empty() {
t.Errorf("priority queue not empty after reset: %v", queue)
}
}
}
func BenchmarkPush(b *testing.B) {
// Create some initial data
data := make([]int, b.N)
prio := make([]float32, b.N)
for i := 0; i < len(data); i++ {
data[i] = rand.Int()
prio[i] = rand.Float32()
}
// Execute the benchmark
b.ResetTimer()
queue := New()
for i := 0; i < len(data); i++ {
queue.Push(data[i], prio[i])
}
}
func BenchmarkPop(b *testing.B) {
// Create some initial data
data := make([]int, b.N)
prio := make([]float32, b.N)
for i := 0; i < len(data); i++ {
data[i] = rand.Int()
prio[i] = rand.Float32()
}
queue := New()
for i := 0; i < len(data); i++ {
queue.Push(data[i], prio[i])
}
// Execute the benchmark
b.ResetTimer()
for !queue.Empty() {
queue.Pop()
}
}

100
Godeps/_workspace/src/gopkg.in/karalabe/cookiejar.v2/collections/prque/sstack.go generated vendored Normal file
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@ -0,0 +1,100 @@
// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox 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 General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
package prque
// The size of a block of data
const blockSize = 4096
// A prioritized item in the sorted stack.
type item struct {
value interface{}
priority float32
}
// Internal sortable stack data structure. Implements the Push and Pop ops for
// the stack (heap) functionality and the Len, Less and Swap methods for the
// sortability requirements of the heaps.
type sstack struct {
size int
capacity int
offset int
blocks [][]*item
active []*item
}
// Creates a new, empty stack.
func newSstack() *sstack {
result := new(sstack)
result.active = make([]*item, blockSize)
result.blocks = [][]*item{result.active}
result.capacity = blockSize
return result
}
// Pushes a value onto the stack, expanding it if necessary. Required by
// heap.Interface.
func (s *sstack) Push(data interface{}) {
if s.size == s.capacity {
s.active = make([]*item, blockSize)
s.blocks = append(s.blocks, s.active)
s.capacity += blockSize
s.offset = 0
} else if s.offset == blockSize {
s.active = s.blocks[s.size/blockSize]
s.offset = 0
}
s.active[s.offset] = data.(*item)
s.offset++
s.size++
}
// Pops a value off the stack and returns it. Currently no shrinking is done.
// Required by heap.Interface.
func (s *sstack) Pop() (res interface{}) {
s.size--
s.offset--
if s.offset < 0 {
s.offset = blockSize - 1
s.active = s.blocks[s.size/blockSize]
}
res, s.active[s.offset] = s.active[s.offset], nil
return
}
// Returns the length of the stack. Required by sort.Interface.
func (s *sstack) Len() int {
return s.size
}
// Compares the priority of two elements of the stack (higher is first).
// Required by sort.Interface.
func (s *sstack) Less(i, j int) bool {
return s.blocks[i/blockSize][i%blockSize].priority > s.blocks[j/blockSize][j%blockSize].priority
}
// Swaps two elements in the stack. Required by sort.Interface.
func (s *sstack) Swap(i, j int) {
ib, io, jb, jo := i/blockSize, i%blockSize, j/blockSize, j%blockSize
s.blocks[ib][io], s.blocks[jb][jo] = s.blocks[jb][jo], s.blocks[ib][io]
}
// Resets the stack, effectively clearing its contents.
func (s *sstack) Reset() {
*s = *newSstack()
}

109
Godeps/_workspace/src/gopkg.in/karalabe/cookiejar.v2/collections/prque/sstack_test.go generated vendored Normal file
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@ -0,0 +1,109 @@
// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox 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 General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
package prque
import (
"math/rand"
"sort"
"testing"
)
func TestSstack(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), rand.Float32()}
}
stack := newSstack()
for rep := 0; rep < 2; rep++ {
// Push all the data into the stack, pop out every second
secs := []*item{}
for i := 0; i < size; i++ {
stack.Push(data[i])
if i%2 == 0 {
secs = append(secs, stack.Pop().(*item))
}
}
rest := []*item{}
for stack.Len() > 0 {
rest = append(rest, stack.Pop().(*item))
}
// Make sure the contents of the resulting slices are ok
for i := 0; i < size; i++ {
if i%2 == 0 && data[i] != secs[i/2] {
t.Errorf("push/pop mismatch: have %v, want %v.", secs[i/2], data[i])
}
if i%2 == 1 && data[i] != rest[len(rest)-i/2-1] {
t.Errorf("push/pop mismatch: have %v, want %v.", rest[len(rest)-i/2-1], data[i])
}
}
}
}
func TestSstackSort(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), float32(i)}
}
// Push all the data into the stack
stack := newSstack()
for _, val := range data {
stack.Push(val)
}
// Sort and pop the stack contents (should reverse the order)
sort.Sort(stack)
for _, val := range data {
out := stack.Pop()
if out != val {
t.Errorf("push/pop mismatch after sort: have %v, want %v.", out, val)
}
}
}
func TestSstackReset(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), rand.Float32()}
}
stack := newSstack()
for rep := 0; rep < 2; rep++ {
// Push all the data into the stack, pop out every second
secs := []*item{}
for i := 0; i < size; i++ {
stack.Push(data[i])
if i%2 == 0 {
secs = append(secs, stack.Pop().(*item))
}
}
// Reset and verify both pulled and stack contents
stack.Reset()
if stack.Len() != 0 {
t.Errorf("stack not empty after reset: %v", stack)
}
for i := 0; i < size; i++ {
if i%2 == 0 && data[i] != secs[i/2] {
t.Errorf("push/pop mismatch: have %v, want %v.", secs[i/2], data[i])
}
}
}
}

3
cmd/geth/main.go
View File

@ -51,7 +51,7 @@ import _ "net/http/pprof"
const (
ClientIdentifier = "Geth"
Version = "0.9.16"
Version = "0.9.17"
)
var (
@ -242,6 +242,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
utils.JSpathFlag,
utils.ListenPortFlag,
utils.MaxPeersFlag,
utils.MaxPendingPeersFlag,
utils.EtherbaseFlag,
utils.MinerThreadsFlag,
utils.MiningEnabledFlag,

1
cmd/mist/main.go
View File

@ -75,6 +75,7 @@ func init() {
utils.LogFileFlag,
utils.LogLevelFlag,
utils.MaxPeersFlag,
utils.MaxPendingPeersFlag,
utils.MinerThreadsFlag,
utils.NATFlag,
utils.NodeKeyFileFlag,

8
cmd/utils/flags.go
View File

@ -195,7 +195,12 @@ var (
MaxPeersFlag = cli.IntFlag{
Name: "maxpeers",
Usage: "Maximum number of network peers (network disabled if set to 0)",
Value: 16,
Value: 25,
}
MaxPendingPeersFlag = cli.IntFlag{
Name: "maxpendpeers",
Usage: "Maximum number of pending connection attempts (defaults used if set to 0)",
Value: 0,
}
ListenPortFlag = cli.IntFlag{
Name: "port",
@ -292,6 +297,7 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
AccountManager: GetAccountManager(ctx),
VmDebug: ctx.GlobalBool(VMDebugFlag.Name),
MaxPeers: ctx.GlobalInt(MaxPeersFlag.Name),
MaxPendingPeers: ctx.GlobalInt(MaxPendingPeersFlag.Name),
Port: ctx.GlobalString(ListenPortFlag.Name),
NAT: GetNAT(ctx),
NatSpec: ctx.GlobalBool(NatspecEnabledFlag.Name),

2
eth/backend.go
View File

@ -61,6 +61,7 @@ type Config struct {
NatSpec bool
MaxPeers int
MaxPendingPeers int
Port string
// Space-separated list of discovery node URLs
@ -283,6 +284,7 @@ func New(config *Config) (*Ethereum, error) {
PrivateKey: netprv,
Name: config.Name,
MaxPeers: config.MaxPeers,
MaxPendingPeers: config.MaxPendingPeers,
Protocols: protocols,
NAT: config.NAT,
NoDial: !config.Dial,

309
eth/downloader/downloader.go
View File

@ -11,11 +11,10 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"gopkg.in/fatih/set.v0"
)
const (
maxBlockFetch = 256 // Amount of max blocks to be fetched per chunk
maxBlockFetch = 128 // Amount of max blocks to be fetched per chunk
peerCountTimeout = 12 * time.Second // Amount of time it takes for the peer handler to ignore minDesiredPeerCount
hashTtl = 20 * time.Second // The amount of time it takes for a hash request to time out
)
@ -25,12 +24,12 @@ var (
blockTtl = 20 * time.Second // The amount of time it takes for a block request to time out
errLowTd = errors.New("peer's TD is too low")
errBusy = errors.New("busy")
ErrBusy = errors.New("busy")
errUnknownPeer = errors.New("peer's unknown or unhealthy")
ErrBadPeer = errors.New("action from bad peer ignored")
errBadPeer = errors.New("action from bad peer ignored")
errNoPeers = errors.New("no peers to keep download active")
errPendingQueue = errors.New("pending items in queue")
errTimeout = errors.New("timeout")
ErrTimeout = errors.New("timeout")
errEmptyHashSet = errors.New("empty hash set by peer")
errPeersUnavailable = errors.New("no peers available or all peers tried for block download process")
errAlreadyInPool = errors.New("hash already in pool")
@ -69,8 +68,7 @@ type Downloader struct {
getBlock getBlockFn
// Status
fetchingHashes int32
downloadingBlocks int32
synchronising int32
// Channels
newPeerCh chan *peer
@ -80,7 +78,7 @@ type Downloader struct {
func New(hasBlock hashCheckFn, getBlock getBlockFn) *Downloader {
downloader := &Downloader{
queue: newqueue(),
queue: newQueue(),
peers: make(peers),
hasBlock: hasBlock,
getBlock: getBlock,
@ -93,7 +91,7 @@ func New(hasBlock hashCheckFn, getBlock getBlockFn) *Downloader {
}
func (d *Downloader) Stats() (current int, max int) {
return d.queue.blockHashes.Size(), d.queue.fetchPool.Size() + d.queue.hashPool.Size()
return d.queue.Size()
}
func (d *Downloader) RegisterPeer(id string, hash common.Hash, getHashes hashFetcherFn, getBlocks blockFetcherFn) error {
@ -111,7 +109,7 @@ func (d *Downloader) RegisterPeer(id string, hash common.Hash, getHashes hashFet
return nil
}
// UnregisterPeer unregister's a peer. This will prevent any action from the specified peer.
// UnregisterPeer unregisters a peer. This will prevent any action from the specified peer.
func (d *Downloader) UnregisterPeer(id string) {
d.mu.Lock()
defer d.mu.Unlock()
@ -121,104 +119,58 @@ func (d *Downloader) UnregisterPeer(id string) {
delete(d.peers, id)
}
// SynchroniseWithPeer will select the peer and use it for synchronising. If an empty string is given
// it will use the best peer possible and synchronise if it's TD is higher than our own. If any of the
// Synchronise will select the peer and use it for synchronising. If an empty string is given
// it will use the best peer possible and synchronize if it's TD is higher than our own. If any of the
// checks fail an error will be returned. This method is synchronous
func (d *Downloader) Synchronise(id string, hash common.Hash) error {
// Make sure it's doing neither. Once done we can restart the
// downloading process if the TD is higher. For now just get on
// with whatever is going on. This prevents unecessary switching.
if d.isBusy() {
return errBusy
// Make sure only one goroutine is ever allowed past this point at once
if !atomic.CompareAndSwapInt32(&d.synchronising, 0, 1) {
return ErrBusy
}
defer atomic.StoreInt32(&d.synchronising, 0)
// When a synchronisation attempt is made while the queue stil
// contains items we abort the sync attempt
if d.queue.size() > 0 {
// Abort if the queue still contains some leftover data
if _, cached := d.queue.Size(); cached > 0 && d.queue.GetHeadBlock() != nil {
return errPendingQueue
}
// Reset the queue to clean any internal leftover state
d.queue.Reset()
// Fetch the peer using the id or throw an error if the peer couldn't be found
// Retrieve the origin peer and initiate the downloading process
p := d.peers[id]
if p == nil {
return errUnknownPeer
}
// Get the hash from the peer and initiate the downloading progress.
err := d.getFromPeer(p, hash, false)
if err != nil {
return err
}
return nil
}
// Done lets the downloader know that whatever previous hashes were taken
// are processed. If the block count reaches zero and done is called
// we reset the queue for the next batch of incoming hashes and blocks.
func (d *Downloader) Done() {
d.queue.mu.Lock()
defer d.queue.mu.Unlock()
if len(d.queue.blocks) == 0 {
d.queue.resetNoTS()
}
return d.getFromPeer(p, hash, false)
}
// TakeBlocks takes blocks from the queue and yields them to the blockTaker handler
// it's possible it yields no blocks
func (d *Downloader) TakeBlocks() types.Blocks {
d.queue.mu.Lock()
defer d.queue.mu.Unlock()
var blocks types.Blocks
if len(d.queue.blocks) > 0 {
// Make sure the parent hash is known
if d.queue.blocks[0] != nil && !d.hasBlock(d.queue.blocks[0].ParentHash()) {
// Check that there are blocks available and its parents are known
head := d.queue.GetHeadBlock()
if head == nil || !d.hasBlock(head.ParentHash()) {
return nil
}
for _, block := range d.queue.blocks {
if block == nil {
break
}
blocks = append(blocks, block)
}
d.queue.blockOffset += len(blocks)
// delete the blocks from the slice and let them be garbage collected
// without this slice trick the blocks would stay in memory until nil
// would be assigned to d.queue.blocks
copy(d.queue.blocks, d.queue.blocks[len(blocks):])
for k, n := len(d.queue.blocks)-len(blocks), len(d.queue.blocks); k < n; k++ {
d.queue.blocks[k] = nil
}
d.queue.blocks = d.queue.blocks[:len(d.queue.blocks)-len(blocks)]
//d.queue.blocks = d.queue.blocks[len(blocks):]
if len(d.queue.blocks) == 0 {
d.queue.blocks = nil
}
}
return blocks
// Retrieve a full batch of blocks
return d.queue.TakeBlocks(head)
}
func (d *Downloader) Has(hash common.Hash) bool {
return d.queue.has(hash)
return d.queue.Has(hash)
}
func (d *Downloader) getFromPeer(p *peer, hash common.Hash, ignoreInitial bool) (err error) {
d.activePeer = p.id
defer func() {
// reset on error
if err != nil {
d.queue.reset()
d.queue.Reset()
}
}()
glog.V(logger.Detail).Infoln("Synchronising with the network using:", p.id)
glog.V(logger.Debug).Infoln("Synchronizing with the network using:", p.id)
// Start the fetcher. This will block the update entirely
// interupts need to be send to the appropriate channels
// respectively.
@ -234,20 +186,13 @@ func (d *Downloader) getFromPeer(p *peer, hash common.Hash, ignoreInitial bool)
return err
}
glog.V(logger.Detail).Infoln("Sync completed")
glog.V(logger.Debug).Infoln("Synchronization completed")
return nil
}
// XXX Make synchronous
func (d *Downloader) startFetchingHashes(p *peer, h common.Hash, ignoreInitial bool) error {
atomic.StoreInt32(&d.fetchingHashes, 1)
defer atomic.StoreInt32(&d.fetchingHashes, 0)
if d.queue.has(h) {
return errAlreadyInPool
}
glog.V(logger.Debug).Infof("Downloading hashes (%x) from %s", h[:4], p.id)
start := time.Now()
@ -256,7 +201,7 @@ func (d *Downloader) startFetchingHashes(p *peer, h common.Hash, ignoreInitial b
// In such circumstances we don't need to download the block so don't add it to the queue.
if !ignoreInitial {
// Add the hash to the queue first
d.queue.hashPool.Add(h)
d.queue.Insert([]common.Hash{h})
}
// Get the first batch of hashes
p.getHashes(h)
@ -273,7 +218,7 @@ out:
for {
select {
case hashPack := <-d.hashCh:
// make sure the active peer is giving us the hashes
// Make sure the active peer is giving us the hashes
if hashPack.peerId != activePeer.id {
glog.V(logger.Debug).Infof("Received hashes from incorrect peer(%s)\n", hashPack.peerId)
break
@ -281,43 +226,37 @@ out:
failureResponseTimer.Reset(hashTtl)
var (
hashes = hashPack.hashes
done bool // determines whether we're done fetching hashes (i.e. common hash found)
)
hashSet := set.New()
for _, hash = range hashes {
if d.hasBlock(hash) || d.queue.blockHashes.Has(hash) {
glog.V(logger.Debug).Infof("Found common hash %x\n", hash[:4])
// Make sure the peer actually gave something valid
if len(hashPack.hashes) == 0 {
glog.V(logger.Debug).Infof("Peer (%s) responded with empty hash set\n", activePeer.id)
d.queue.Reset()
return errEmptyHashSet
}
// Determine if we're done fetching hashes (queue up all pending), and continue if not done
done, index := false, 0
for index, hash = range hashPack.hashes {
if d.hasBlock(hash) || d.queue.GetBlock(hash) != nil {
glog.V(logger.Debug).Infof("Found common hash %x\n", hash[:4])
hashPack.hashes = hashPack.hashes[:index]
done = true
break
}
hashSet.Add(hash)
}
d.queue.put(hashSet)
d.queue.Insert(hashPack.hashes)
// Add hashes to the chunk set
if len(hashes) == 0 { // Make sure the peer actually gave you something valid
glog.V(logger.Debug).Infof("Peer (%s) responded with empty hash set\n", activePeer.id)
d.queue.reset()
return errEmptyHashSet
} else if !done { // Check if we're done fetching
// Get the next set of hashes
if !done {
activePeer.getHashes(hash)
} else { // we're done
// The offset of the queue is determined by the highest known block
var offset int
continue
}
// We're done, allocate the download cache and proceed pulling the blocks
offset := 0
if block := d.getBlock(hash); block != nil {
offset = int(block.NumberU64() + 1)
}
// allocate proper size for the queueue
d.queue.alloc(offset, d.queue.hashPool.Size())
d.queue.Alloc(offset)
break out
}
case <-failureResponseTimer.C:
glog.V(logger.Debug).Infof("Peer (%s) didn't respond in time for hash request\n", p.id)
@ -326,7 +265,7 @@ out:
// already fetched hash list. This can't guarantee 100% correctness but does
// a fair job. This is always either correct or false incorrect.
for id, peer := range d.peers {
if d.queue.hashPool.Has(peer.recentHash) && !attemptedPeers[id] {
if d.queue.Has(peer.recentHash) && !attemptedPeers[id] {
p = peer
break
}
@ -335,8 +274,8 @@ out:
// if all peers have been tried, abort the process entirely or if the hash is
// the zero hash.
if p == nil || (hash == common.Hash{}) {
d.queue.reset()
return errTimeout
d.queue.Reset()
return ErrTimeout
}
// set p to the active peer. this will invalidate any hashes that may be returned
@ -346,15 +285,14 @@ out:
glog.V(logger.Debug).Infof("Hash fetching switched to new peer(%s)\n", p.id)
}
}
glog.V(logger.Detail).Infof("Downloaded hashes (%d) in %v\n", d.queue.hashPool.Size(), time.Since(start))
glog.V(logger.Debug).Infof("Downloaded hashes (%d) in %v\n", d.queue.Pending(), time.Since(start))
return nil
}
func (d *Downloader) startFetchingBlocks(p *peer) error {
glog.V(logger.Detail).Infoln("Downloading", d.queue.hashPool.Size(), "block(s)")
atomic.StoreInt32(&d.downloadingBlocks, 1)
defer atomic.StoreInt32(&d.downloadingBlocks, 0)
glog.V(logger.Debug).Infoln("Downloading", d.queue.Pending(), "block(s)")
// Defer the peer reset. This will empty the peer requested set
// and makes sure there are no lingering peers with an incorrect
// state
@ -362,7 +300,7 @@ func (d *Downloader) startFetchingBlocks(p *peer) error {
start := time.Now()
// default ticker for re-fetching blocks everynow and then
// default ticker for re-fetching blocks every now and then
ticker := time.NewTicker(20 * time.Millisecond)
out:
for {
@ -371,7 +309,7 @@ out:
// If the peer was previously banned and failed to deliver it's pack
// in a reasonable time frame, ignore it's message.
if d.peers[blockPack.peerId] != nil {
err := d.queue.deliver(blockPack.peerId, blockPack.blocks)
err := d.queue.Deliver(blockPack.peerId, blockPack.blocks)
if err != nil {
glog.V(logger.Debug).Infof("deliver failed for peer %s: %v\n", blockPack.peerId, err)
// FIXME d.UnregisterPeer(blockPack.peerId)
@ -385,86 +323,70 @@ out:
d.peers.setState(blockPack.peerId, idleState)
}
case <-ticker.C:
// after removing bad peers make sure we actually have suffucient peer left to keep downlading
if len(d.peers) == 0 {
d.queue.reset()
return errNoPeers
}
// If there are unrequested hashes left start fetching
// from the available peers.
if d.queue.hashPool.Size() > 0 {
availablePeers := d.peers.get(idleState)
for _, peer := range availablePeers {
// Get a possible chunk. If nil is returned no chunk
// could be returned due to no hashes available.
chunk := d.queue.get(peer, maxBlockFetch)
if chunk == nil {
continue
}
// XXX make fetch blocking.
// Fetch the chunk and check for error. If the peer was somehow
// already fetching a chunk due to a bug, it will be returned to
// the queue
if err := peer.fetch(chunk); err != nil {
// log for tracing
glog.V(logger.Debug).Infof("peer %s received double work (state = %v)\n", peer.id, peer.state)
d.queue.put(chunk.hashes)
}
}
// make sure that we have peers available for fetching. If all peers have been tried
// and all failed throw an error
if len(d.queue.fetching) == 0 {
d.queue.reset()
return fmt.Errorf("%v peers avaialable = %d. total peers = %d. hashes needed = %d", errPeersUnavailable, len(availablePeers), len(d.peers), d.queue.hashPool.Size())
}
} else if len(d.queue.fetching) == 0 {
// When there are no more queue and no more `fetching`. We can
// safely assume we're done. Another part of the process will check
// for parent errors and will re-request anything that's missing
break out
} else {
// Check for bad peers. Bad peers may indicate a peer not responding
// to a `getBlocks` message. A timeout of 5 seconds is set. Peers
// that badly or poorly behave are removed from the peer set (not banned).
// Bad peers are excluded from the available peer set and therefor won't be
// reused. XXX We could re-introduce peers after X time.
d.queue.mu.Lock()
var badPeers []string
for pid, chunk := range d.queue.fetching {
if time.Since(chunk.itime) > blockTtl {
badPeers = append(badPeers, pid)
// remove peer as good peer from peer list
// FIXME d.UnregisterPeer(pid)
}
}
d.queue.mu.Unlock()
badPeers := d.queue.Expire(blockTtl)
for _, pid := range badPeers {
// A nil chunk is delivered so that the chunk's hashes are given
// back to the queue objects. When hashes are put back in the queue
// other (decent) peers can pick them up.
// XXX We could make use of a reputation system here ranking peers
// in their performance
// 1) Time for them to respond;
// 2) Measure their speed;
// 3) Amount and availability.
d.queue.deliver(pid, nil)
if peer := d.peers[pid]; peer != nil {
peer.demote()
peer.reset()
}
}
}
// After removing bad peers make sure we actually have sufficient peer left to keep downloading
if len(d.peers) == 0 {
d.queue.Reset()
return errNoPeers
}
// If there are unrequested hashes left start fetching
// from the available peers.
if d.queue.Pending() > 0 {
// Throttle the download if block cache is full and waiting processing
if d.queue.Throttle() {
continue
}
availablePeers := d.peers.get(idleState)
for _, peer := range availablePeers {
// Get a possible chunk. If nil is returned no chunk
// could be returned due to no hashes available.
request := d.queue.Reserve(peer, maxBlockFetch)
if request == nil {
continue
}
// XXX make fetch blocking.
// Fetch the chunk and check for error. If the peer was somehow
// already fetching a chunk due to a bug, it will be returned to
// the queue
if err := peer.fetch(request); err != nil {
// log for tracing
glog.V(logger.Debug).Infof("peer %s received double work (state = %v)\n", peer.id, peer.state)
d.queue.Cancel(request)
}
}
// make sure that we have peers available for fetching. If all peers have been tried
// and all failed throw an error
if d.queue.InFlight() == 0 {
d.queue.Reset()
return fmt.Errorf("%v peers avaialable = %d. total peers = %d. hashes needed = %d", errPeersUnavailable, len(availablePeers), len(d.peers), d.queue.Pending())
}
} else if d.queue.InFlight() == 0 {
// When there are no more queue and no more in flight, We can
// safely assume we're done. Another part of the process will check
// for parent errors and will re-request anything that's missing
break out
}
}
}
glog.V(logger.Detail).Infoln("Downloaded block(s) in", time.Since(start))
return nil
@ -484,28 +406,11 @@ func (d *Downloader) AddHashes(id string, hashes []common.Hash) error {
return fmt.Errorf("received hashes from %s while active peer is %s", id, d.activePeer)
}
if glog.V(logger.Detail) && len(hashes) != 0 {
if glog.V(logger.Debug) && len(hashes) != 0 {
from, to := hashes[0], hashes[len(hashes)-1]
glog.Infof("adding %d (T=%d) hashes [ %x / %x ] from: %s\n", len(hashes), d.queue.hashPool.Size(), from[:4], to[:4], id)
glog.V(logger.Debug).Infof("adding %d (T=%d) hashes [ %x / %x ] from: %s\n", len(hashes), d.queue.Pending(), from[:4], to[:4], id)
}
d.hashCh <- hashPack{id, hashes}
return nil
}
func (d *Downloader) isFetchingHashes() bool {
return atomic.LoadInt32(&d.fetchingHashes) == 1
}
func (d *Downloader) isDownloadingBlocks() bool {
return atomic.LoadInt32(&d.downloadingBlocks) == 1
}
func (d *Downloader) isBusy() bool {
return d.isFetchingHashes() || d.isDownloadingBlocks()
}
func (d *Downloader) IsBusy() bool {
return d.isBusy()
}

52
eth/downloader/downloader_test.go
View File

@ -128,7 +128,7 @@ func TestDownload(t *testing.T) {
t.Error("download error", err)
}
inqueue := len(tester.downloader.queue.blocks)
inqueue := len(tester.downloader.queue.blockCache)
if inqueue != targetBlocks {
t.Error("expected", targetBlocks, "have", inqueue)
}
@ -151,7 +151,7 @@ func TestMissing(t *testing.T) {
t.Error("download error", err)
}
inqueue := len(tester.downloader.queue.blocks)
inqueue := len(tester.downloader.queue.blockCache)
if inqueue != targetBlocks {
t.Error("expected", targetBlocks, "have", inqueue)
}
@ -181,3 +181,51 @@ func TestTaking(t *testing.T) {
t.Error("expected to take 1000, got", len(bs1))
}
}
func TestThrottling(t *testing.T) {
minDesiredPeerCount = 4
blockTtl = 1 * time.Second
targetBlocks := 4 * blockCacheLimit
hashes := createHashes(0, targetBlocks)
blocks := createBlocksFromHashes(hashes)
tester := newTester(t, hashes, blocks)
tester.newPeer("peer1", big.NewInt(10000), hashes[0])
tester.newPeer("peer2", big.NewInt(0), common.Hash{})
tester.badBlocksPeer("peer3", big.NewInt(0), common.Hash{})
tester.badBlocksPeer("peer4", big.NewInt(0), common.Hash{})
// Concurrently download and take the blocks
errc := make(chan error, 1)
go func() {
errc <- tester.sync("peer1", hashes[0])
}()
done := make(chan struct{})
took := []*types.Block{}
go func() {
for {
select {
case <-done:
took = append(took, tester.downloader.TakeBlocks()...)
done <- struct{}{}
return
default:
took = append(took, tester.downloader.TakeBlocks()...)
}
}
}()
// Synchronise the two threads and verify
err := <-errc
done <- struct{}{}
<-done
if err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
if len(took) != targetBlocks {
t.Fatalf("downloaded block mismatch: have %v, want %v", len(took), targetBlocks)
}
}

15
eth/downloader/peer.go
View File

@ -78,7 +78,7 @@ func newPeer(id string, hash common.Hash, getHashes hashFetcherFn, getBlocks blo
}
// fetch a chunk using the peer
func (p *peer) fetch(chunk *chunk) error {
func (p *peer) fetch(request *fetchRequest) error {
p.mu.Lock()
defer p.mu.Unlock()
@ -88,13 +88,12 @@ func (p *peer) fetch(chunk *chunk) error {
// set working state
p.state = workingState
// convert the set to a fetchable slice
hashes, i := make([]common.Hash, chunk.hashes.Size()), 0
chunk.hashes.Each(func(v interface{}) bool {
hashes[i] = v.(common.Hash)
i++
return true
})
// Convert the hash set to a fetchable slice
hashes := make([]common.Hash, 0, len(request.Hashes))
for hash, _ := range request.Hashes {
hashes = append(hashes, hash)
}
p.getBlocks(hashes)
return nil

410
eth/downloader/queue.go
View File

@ -1,201 +1,341 @@
package downloader
import (
"errors"
"fmt"
"math"
"sync"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"gopkg.in/fatih/set.v0"
"gopkg.in/karalabe/cookiejar.v2/collections/prque"
)
const (
blockCacheLimit = 1024 // Maximum number of blocks to cache before throttling the download
)
// fetchRequest is a currently running block retrieval operation.
type fetchRequest struct {
Peer *peer // Peer to which the request was sent
Hashes map[common.Hash]int // Requested hashes with their insertion index (priority)
Time time.Time // Time when the request was made
}
// queue represents hashes that are either need fetching or are being fetched
type queue struct {
hashPool *set.Set
fetchPool *set.Set
blockHashes *set.Set
hashPool map[common.Hash]int // Pending hashes, mapping to their insertion index (priority)
hashQueue *prque.Prque // Priority queue of the block hashes to fetch
hashCounter int // Counter indexing the added hashes to ensure retrieval order
mu sync.Mutex
fetching map[string]*chunk
pendPool map[string]*fetchRequest // Currently pending block retrieval operations
blockOffset int
blocks []*types.Block
blockPool map[common.Hash]int // Hash-set of the downloaded data blocks, mapping to cache indexes
blockCache []*types.Block // Downloaded but not yet delivered blocks
blockOffset int // Offset of the first cached block in the block-chain
lock sync.RWMutex
}
func newqueue() *queue {
// newQueue creates a new download queue for scheduling block retrieval.
func newQueue() *queue {
return &queue{
hashPool: set.New(),
fetchPool: set.New(),
blockHashes: set.New(),
fetching: make(map[string]*chunk),
hashPool: make(map[common.Hash]int),
hashQueue: prque.New(),
pendPool: make(map[string]*fetchRequest),
blockPool: make(map[common.Hash]int),
}
}
func (c *queue) reset() {
c.mu.Lock()
defer c.mu.Unlock()
// Reset clears out the queue contents.
func (q *queue) Reset() {
q.lock.Lock()
defer q.lock.Unlock()
c.resetNoTS()
}
func (c *queue) resetNoTS() {
c.blockOffset = 0
c.hashPool.Clear()
c.fetchPool.Clear()
c.blockHashes.Clear()
c.blocks = nil
c.fetching = make(map[string]*chunk)
q.hashPool = make(map[common.Hash]int)
q.hashQueue.Reset()
q.hashCounter = 0
q.pendPool = make(map[string]*fetchRequest)
q.blockPool = make(map[common.Hash]int)
q.blockOffset = 0
q.blockCache = nil
}
func (c *queue) size() int {
return c.hashPool.Size() + c.blockHashes.Size() + c.fetchPool.Size()
// Size retrieves the number of hashes in the queue, returning separately for
// pending and already downloaded.
func (q *queue) Size() (int, int) {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.hashPool), len(q.blockPool)
}
// reserve a `max` set of hashes for `p` peer.
func (c *queue) get(p *peer, max int) *chunk {
c.mu.Lock()
defer c.mu.Unlock()
// Pending retrieves the number of hashes pending for retrieval.
func (q *queue) Pending() int {
q.lock.RLock()
defer q.lock.RUnlock()
// return nothing if the pool has been depleted
if c.hashPool.Size() == 0 {
return nil
return q.hashQueue.Size()
}
// InFlight retrieves the number of fetch requests currently in flight.
func (q *queue) InFlight() int {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.pendPool)
}
// Throttle checks if the download should be throttled (active block fetches
// exceed block cache).
func (q *queue) Throttle() bool {
q.lock.RLock()
defer q.lock.RUnlock()
// Calculate the currently in-flight block requests
pending := 0
for _, request := range q.pendPool {
pending += len(request.Hashes)
}
// Throttle if more blocks are in-flight than free space in the cache
return pending >= len(q.blockCache)-len(q.blockPool)
}
limit := int(math.Min(float64(max), float64(c.hashPool.Size())))
// Create a new set of hashes
hashes, i := set.New(), 0
c.hashPool.Each(func(v interface{}) bool {
// break on limit
if i == limit {
// Has checks if a hash is within the download queue or not.
func (q *queue) Has(hash common.Hash) bool {
q.lock.RLock()
defer q.lock.RUnlock()
if _, ok := q.hashPool[hash]; ok {
return true
}
if _, ok := q.blockPool[hash]; ok {
return true
}
return false
}
// skip any hashes that have previously been requested from the peer
if p.ignored.Has(v) {
return true
}
hashes.Add(v)
i++
return true
})
// if no hashes can be requested return a nil chunk
if hashes.Size() == 0 {
return nil
}
// remove the fetchable hashes from hash pool
c.hashPool.Separate(hashes)
c.fetchPool.Merge(hashes)
// Create a new chunk for the seperated hashes. The time is being used
// to reset the chunk (timeout)
chunk := &chunk{p, hashes, time.Now()}
// register as 'fetching' state
c.fetching[p.id] = chunk
// create new chunk for peer
return chunk
}
func (c *queue) has(hash common.Hash) bool {
return c.hashPool.Has(hash) || c.fetchPool.Has(hash) || c.blockHashes.Has(hash)
// Insert adds a set of hashes for the download queue for scheduling.
func (q *queue) Insert(hashes []common.Hash) {
q.lock.Lock()
defer q.lock.Unlock()
// Insert all the hashes prioritized in the arrival order
for i, hash := range hashes {
index := q.hashCounter + i
q.hashPool[hash] = index
q.hashQueue.Push(hash, float32(index)) // Highest gets schedules first
}
// Update the hash counter for the next batch of inserts
q.hashCounter += len(hashes)
}
func (c *queue) getBlock(hash common.Hash) *types.Block {
c.mu.Lock()
defer c.mu.Unlock()
// GetHeadBlock retrieves the first block from the cache, or nil if it hasn't
// been downloaded yet (or simply non existent).
func (q *queue) GetHeadBlock() *types.Block {
q.lock.RLock()
defer q.lock.RUnlock()
if !c.blockHashes.Has(hash) {
if len(q.blockCache) == 0 {
return nil
}
return q.blockCache[0]
}
for _, block := range c.blocks {
if block.Hash() == hash {
return block
// GetBlock retrieves a downloaded block, or nil if non-existent.
func (q *queue) GetBlock(hash common.Hash) *types.Block {
q.lock.RLock()
defer q.lock.RUnlock()
// Short circuit if the block hasn't been downloaded yet
index, ok := q.blockPool[hash]
if !ok {
return nil
}
// Return the block if it's still available in the cache
if q.blockOffset <= index && index < q.blockOffset+len(q.blockCache) {
return q.blockCache[index-q.blockOffset]
}
return nil
}
// deliver delivers a chunk to the queue that was requested of the peer
func (c *queue) deliver(id string, blocks []*types.Block) (err error) {
c.mu.Lock()
defer c.mu.Unlock()
// TakeBlocks retrieves and permanently removes a batch of blocks from the cache.
// The head parameter is required to prevent a race condition where concurrent
// takes may fail parent verifications.
func (q *queue) TakeBlocks(head *types.Block) types.Blocks {
q.lock.Lock()
defer q.lock.Unlock()
chunk := c.fetching[id]
// If the chunk was never requested simply ignore it
if chunk != nil {
delete(c.fetching, id)
// check the length of the returned blocks. If the length of blocks is 0
// we'll assume the peer doesn't know about the chain.
if len(blocks) == 0 {
// So we can ignore the blocks we didn't know about
chunk.peer.ignored.Merge(chunk.hashes)
// Short circuit if the head block's different
if len(q.blockCache) == 0 || q.blockCache[0] != head {
return nil
}
// Add the blocks
for i, block := range blocks {
// See (1) for future limitation
n := int(block.NumberU64()) - c.blockOffset
if n > len(c.blocks) || n < 0 {
// set the error and set the blocks which could be processed
// abort the rest of the blocks (FIXME this could be improved)
err = fmt.Errorf("received block which overflow (N=%v O=%v)", block.Number(), c.blockOffset)
blocks = blocks[:i]
// Otherwise accumulate all available blocks
var blocks types.Blocks
for _, block := range q.blockCache {
if block == nil {
break
}
c.blocks[n] = block
blocks = append(blocks, block)
delete(q.blockPool, block.Hash())
}
// seperate the blocks and the hashes
blockHashes := chunk.fetchedHashes(blocks)
// merge block hashes
c.blockHashes.Merge(blockHashes)
// Add back whatever couldn't be delivered
c.hashPool.Merge(chunk.hashes)
// Remove the hashes from the fetch pool
c.fetchPool.Separate(chunk.hashes)
// Delete the blocks from the slice and let them be garbage collected
// without this slice trick the blocks would stay in memory until nil
// would be assigned to q.blocks
copy(q.blockCache, q.blockCache[len(blocks):])
for k, n := len(q.blockCache)-len(blocks), len(q.blockCache); k < n; k++ {
q.blockCache[k] = nil
}
q.blockOffset += len(blocks)
return
return blocks
}
func (c *queue) alloc(offset, size int) {
c.mu.Lock()
defer c.mu.Unlock()
// Reserve reserves a set of hashes for the given peer, skipping any previously
// failed download.
func (q *queue) Reserve(p *peer, max int) *fetchRequest {
q.lock.Lock()
defer q.lock.Unlock()
if c.blockOffset < offset {
c.blockOffset = offset
// Short circuit if the pool has been depleted, or if the peer's already
// downloading something (sanity check not to corrupt state)
if q.hashQueue.Empty() {
return nil
}
// (1) XXX at some point we could limit allocation to memory and use the disk
// to store future blocks.
if len(c.blocks) < size {
c.blocks = append(c.blocks, make([]*types.Block, size)...)
if _, ok := q.pendPool[p.id]; ok {
return nil
}
// Retrieve a batch of hashes, skipping previously failed ones
send := make(map[common.Hash]int)
skip := make(map[common.Hash]int)
for len(send) < max && !q.hashQueue.Empty() {
hash, priority := q.hashQueue.Pop()
if p.ignored.Has(hash) {
skip[hash.(common.Hash)] = int(priority)
} else {
send[hash.(common.Hash)] = int(priority)
}
}
// Merge all the skipped hashes back
for hash, index := range skip {
q.hashQueue.Push(hash, float32(index))
}
// Assemble and return the block download request
if len(send) == 0 {
return nil
}
request := &fetchRequest{
Peer: p,
Hashes: send,
Time: time.Now(),
}
q.pendPool[p.id] = request
return request
}
// puts puts sets of hashes on to the queue for fetching
func (c *queue) put(hashes *set.Set) {
c.mu.Lock()
defer c.mu.Unlock()
// Cancel aborts a fetch request, returning all pending hashes to the queue.
func (q *queue) Cancel(request *fetchRequest) {
q.lock.Lock()
defer q.lock.Unlock()
c.hashPool.Merge(hashes)
for hash, index := range request.Hashes {
q.hashQueue.Push(hash, float32(index))
}
delete(q.pendPool, request.Peer.id)
}
type chunk struct {
peer *peer
hashes *set.Set
itime time.Time
// Expire checks for in flight requests that exceeded a timeout allowance,
// canceling them and returning the responsible peers for penalization.
func (q *queue) Expire(timeout time.Duration) []string {
q.lock.Lock()
defer q.lock.Unlock()
// Iterate over the expired requests and return each to the queue
peers := []string{}
for id, request := range q.pendPool {
if time.Since(request.Time) > timeout {
for hash, index := range request.Hashes {
q.hashQueue.Push(hash, float32(index))
}
peers = append(peers, id)
}
}
// Remove the expired requests from the pending pool
for _, id := range peers {
delete(q.pendPool, id)
}
return peers
}
func (ch *chunk) fetchedHashes(blocks []*types.Block) *set.Set {
fhashes := set.New()
// Deliver injects a block retrieval response into the download queue.
func (q *queue) Deliver(id string, blocks []*types.Block) (err error) {
q.lock.Lock()
defer q.lock.Unlock()
// Short circuit if the blocks were never requested
request := q.pendPool[id]
if request == nil {
return errors.New("no fetches pending")
}
delete(q.pendPool, id)
// If no blocks were retrieved, mark them as unavailable for the origin peer
if len(blocks) == 0 {
for hash, _ := range request.Hashes {
request.Peer.ignored.Add(hash)
}
}
// Iterate over the downloaded blocks and add each of them
errs := make([]error, 0)
for _, block := range blocks {
fhashes.Add(block.Hash())
// Skip any blocks that fall outside the cache range
index := int(block.NumberU64()) - q.blockOffset
if index >= len(q.blockCache) || index < 0 {
//fmt.Printf("block cache overflown (N=%v O=%v, C=%v)", block.Number(), q.blockOffset, len(q.blockCache))
continue
}
ch.hashes.Separate(fhashes)
// Skip any blocks that were not requested
hash := block.Hash()
if _, ok := request.Hashes[hash]; !ok {
errs = append(errs, fmt.Errorf("non-requested block %v", hash))
continue
}
// Otherwise merge the block and mark the hash block
q.blockCache[index] = block
return fhashes
delete(request.Hashes, hash)
delete(q.hashPool, hash)
q.blockPool[hash] = int(block.NumberU64())
}
// Return all failed fetches to the queue
for hash, index := range request.Hashes {
q.hashQueue.Push(hash, float32(index))
}
if len(errs) != 0 {
return fmt.Errorf("multiple failures: %v", errs)
}
return nil
}
// Alloc ensures that the block cache is the correct size, given a starting
// offset, and a memory cap.
func (q *queue) Alloc(offset int) {
q.lock.Lock()
defer q.lock.Unlock()
if q.blockOffset < offset {
q.blockOffset = offset
}
size := len(q.hashPool)
if size > blockCacheLimit {
size = blockCacheLimit
}
if len(q.blockCache) < size {
q.blockCache = append(q.blockCache, make([]*types.Block, size-len(q.blockCache))...)
}
}

17
eth/downloader/queue_test.go
View File

@ -32,31 +32,30 @@ func createBlocksFromHashSet(hashes *set.Set) []*types.Block {
}
func TestChunking(t *testing.T) {
queue := newqueue()
queue := newQueue()
peer1 := newPeer("peer1", common.Hash{}, nil, nil)
peer2 := newPeer("peer2", common.Hash{}, nil, nil)
// 99 + 1 (1 == known genesis hash)
hashes := createHashes(0, 99)
hashSet := createHashSet(hashes)
queue.put(hashSet)
queue.Insert(hashes)
chunk1 := queue.get(peer1, 99)
chunk1 := queue.Reserve(peer1, 99)
if chunk1 == nil {
t.Errorf("chunk1 is nil")
t.FailNow()
}
chunk2 := queue.get(peer2, 99)
chunk2 := queue.Reserve(peer2, 99)
if chunk2 == nil {
t.Errorf("chunk2 is nil")
t.FailNow()
}
if chunk1.hashes.Size() != 99 {
t.Error("expected chunk1 hashes to be 99, got", chunk1.hashes.Size())
if len(chunk1.Hashes) != 99 {
t.Error("expected chunk1 hashes to be 99, got", len(chunk1.Hashes))
}
if chunk2.hashes.Size() != 1 {
t.Error("expected chunk1 hashes to be 1, got", chunk2.hashes.Size())
if len(chunk2.Hashes) != 1 {
t.Error("expected chunk1 hashes to be 1, got", len(chunk2.Hashes))
}
}

6
eth/handler.go
View File

@ -19,8 +19,8 @@ import (
)
const (
peerCountTimeout = 12 * time.Second // Amount of time it takes for the peer handler to ignore minDesiredPeerCount
blockProcTimer = 500 * time.Millisecond
forceSyncCycle = 10 * time.Second // Time interval to force syncs, even if few peers are available
blockProcCycle = 500 * time.Millisecond // Time interval to check for new blocks to process
minDesiredPeerCount = 5 // Amount of peers desired to start syncing
blockProcAmount = 256
)
@ -307,7 +307,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
// Attempt to insert the newly received by checking if the parent exists.
// if the parent exists we process the block and propagate to our peers
// otherwise synchronise with the peer
// otherwise synchronize with the peer
if self.chainman.HasBlock(request.Block.ParentHash()) {
if _, err := self.chainman.InsertChain(types.Blocks{request.Block}); err != nil {
glog.V(logger.Error).Infoln("removed peer (", p.id, ") due to block error")

56
eth/sync.go
View File

@ -12,10 +12,8 @@ import (
// Sync contains all synchronisation code for the eth protocol
func (pm *ProtocolManager) update() {
// itimer is used to determine when to start ignoring `minDesiredPeerCount`
itimer := time.NewTimer(peerCountTimeout)
// btimer is used for picking of blocks from the downloader
btimer := time.Tick(blockProcTimer)
forceSync := time.Tick(forceSyncCycle)
blockProc := time.Tick(blockProcCycle)
for {
select {
@ -24,27 +22,22 @@ func (pm *ProtocolManager) update() {
if len(pm.peers) < minDesiredPeerCount {
break
}
// Find the best peer
// Find the best peer and synchronise with it
peer := getBestPeer(pm.peers)
if peer == nil {
glog.V(logger.Debug).Infoln("Sync attempt cancelled. No peers available")
glog.V(logger.Debug).Infoln("Sync attempt canceled. No peers available")
}
itimer.Stop()
go pm.synchronise(peer)
case <-itimer.C:
// The timer will make sure that the downloader keeps an active state
// in which it attempts to always check the network for highest td peers
// Either select the peer or restart the timer if no peers could
// be selected.
case <-forceSync:
// Force a sync even if not enough peers are present
if peer := getBestPeer(pm.peers); peer != nil {
go pm.synchronise(peer)
} else {
itimer.Reset(5 * time.Second)
}
case <-btimer:
case <-blockProc:
// Try to pull some blocks from the downloaded
go pm.processBlocks()
case <-pm.quitSync:
return
}
@ -59,12 +52,11 @@ func (pm *ProtocolManager) processBlocks() error {
pm.wg.Add(1)
defer pm.wg.Done()
// Take a batch of blocks (will return nil if a previous batch has not reached the chain yet)
blocks := pm.downloader.TakeBlocks()
if len(blocks) == 0 {
return nil
}
defer pm.downloader.Done()
glog.V(logger.Debug).Infof("Inserting chain with %d blocks (#%v - #%v)\n", len(blocks), blocks[0].Number(), blocks[len(blocks)-1].Number())
for len(blocks) != 0 && !pm.quit {
@ -83,26 +75,28 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
if peer.td.Cmp(pm.chainman.Td()) <= 0 {
return
}
// Check downloader if it's busy so it doesn't show the sync message
// for every attempty
if pm.downloader.IsBusy() {
return
}
// FIXME if we have the hash in our chain and the TD of the peer is
// much higher than ours, something is wrong with us or the peer.
// Check if the hash is on our own chain
if pm.chainman.HasBlock(peer.recentHash) {
return
}
// Get the hashes from the peer (synchronously)
glog.V(logger.Debug).Infof("Attempting synchronisation: %v, 0x%x", peer.id, peer.recentHash)
err := pm.downloader.Synchronise(peer.id, peer.recentHash)
if err != nil && err == downloader.ErrBadPeer {
glog.V(logger.Debug).Infoln("removed peer from peer set due to bad action")
switch err {
case nil:
glog.V(logger.Debug).Infof("Synchronisation completed")
case downloader.ErrBusy:
glog.V(logger.Debug).Infof("Synchronisation already in progress")
case downloader.ErrTimeout:
glog.V(logger.Debug).Infof("Removing peer %v due to sync timeout", peer.id)
pm.removePeer(peer)
} else if err != nil {
// handle error
glog.V(logger.Detail).Infoln("error downloading:", err)
default:
glog.V(logger.Warn).Infof("Synchronisation failed: %v", err)
}
}

19
jsre/jsre.go
View File

@ -286,7 +286,7 @@ func (self *JSRE) loadScript(call otto.FunctionCall) otto.Value {
// uses the "prettyPrint" JS function to format a value
func (self *JSRE) PrettyPrint(v interface{}) (val otto.Value, err error) {
var method otto.Value
v, err = self.vm.ToValue(v)
v, err = self.ToValue(v)
if err != nil {
return
}
@ -297,8 +297,23 @@ func (self *JSRE) PrettyPrint(v interface{}) (val otto.Value, err error) {
return method.Call(method, v)
}
// creates an otto value from a go type
// creates an otto value from a go type (serialized version)
func (self *JSRE) ToValue(v interface{}) (otto.Value, error) {
done := make(chan bool)
req := &evalReq{
fn: func(res *evalResult) {
res.result, res.err = self.vm.ToValue(v)
},
done: done,
}
self.evalQueue <- req
<-done
return req.res.result, req.res.err
}
// creates an otto value from a go type (non-serialized version)
func (self *JSRE) ToVal(v interface{}) otto.Value {
result, err := self.vm.ToValue(v)
if err != nil {
fmt.Println("Value unknown:", err)

24
p2p/handshake.go
View File

@ -65,26 +65,26 @@ type protoHandshake struct {
ID discover.NodeID
}
// setupConn starts a protocol session on the given connection.
// It runs the encryption handshake and the protocol handshake.
// If dial is non-nil, the connection the local node is the initiator.
// If atcap is true, the connection will be disconnected with DiscTooManyPeers
// after the key exchange.
func setupConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
// setupConn starts a protocol session on the given connection. It
// runs the encryption handshake and the protocol handshake. If dial
// is non-nil, the connection the local node is the initiator. If
// keepconn returns false, the connection will be disconnected with
// DiscTooManyPeers after the key exchange.
func setupConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, keepconn func(discover.NodeID) bool) (*conn, error) {
if dial == nil {
return setupInboundConn(fd, prv, our, atcap, trusted)
return setupInboundConn(fd, prv, our, keepconn)
} else {
return setupOutboundConn(fd, prv, our, dial, atcap, trusted)
return setupOutboundConn(fd, prv, our, dial, keepconn)
}
}
func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, keepconn func(discover.NodeID) bool) (*conn, error) {
secrets, err := receiverEncHandshake(fd, prv, nil)
if err != nil {
return nil, fmt.Errorf("encryption handshake failed: %v", err)
}
rw := newRlpxFrameRW(fd, secrets)
if atcap && !trusted[secrets.RemoteID] {
if !keepconn(secrets.RemoteID) {
SendItems(rw, discMsg, DiscTooManyPeers)
return nil, errors.New("we have too many peers")
}
@ -99,13 +99,13 @@ func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, a
return &conn{rw, rhs}, nil
}
func setupOutboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
func setupOutboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, keepconn func(discover.NodeID) bool) (*conn, error) {
secrets, err := initiatorEncHandshake(fd, prv, dial.ID, nil)
if err != nil {
return nil, fmt.Errorf("encryption handshake failed: %v", err)
}
rw := newRlpxFrameRW(fd, secrets)
if atcap && !trusted[secrets.RemoteID] {
if !keepconn(secrets.RemoteID) {
SendItems(rw, discMsg, DiscTooManyPeers)
return nil, errors.New("we have too many peers")
}

5
p2p/handshake_test.go
View File

@ -141,9 +141,10 @@ func TestSetupConn(t *testing.T) {
fd0, fd1 := net.Pipe()
done := make(chan struct{})
keepalways := func(discover.NodeID) bool { return true }
go func() {
defer close(done)
conn0, err := setupConn(fd0, prv0, hs0, node1, false, nil)
conn0, err := setupConn(fd0, prv0, hs0, node1, keepalways)
if err != nil {
t.Errorf("outbound side error: %v", err)
return
@ -156,7 +157,7 @@ func TestSetupConn(t *testing.T) {
}
}()
conn1, err := setupConn(fd1, prv1, hs1, nil, false, nil)
conn1, err := setupConn(fd1, prv1, hs1, nil, keepalways)
if err != nil {
t.Fatalf("inbound side error: %v", err)
}

12
p2p/peer.go
View File

@ -211,6 +211,18 @@ func (p *Peer) handle(msg Msg) error {
return nil
}
func countMatchingProtocols(protocols []Protocol, caps []Cap) int {
n := 0
for _, cap := range caps {
for _, proto := range protocols {
if proto.Name == cap.Name && proto.Version == cap.Version {
n++
}
}
}
return n
}
// matchProtocols creates structures for matching named subprotocols.
func matchProtocols(protocols []Protocol, caps []Cap, rw MsgReadWriter) map[string]*protoRW {
sort.Sort(capsByName(caps))

77
p2p/server.go
View File

@ -22,10 +22,11 @@ const (
refreshPeersInterval = 30 * time.Second
staticPeerCheckInterval = 15 * time.Second
// This is the maximum number of inbound connection
// that are allowed to linger between 'accepted' and
// 'added as peer'.
maxAcceptConns = 50
// Maximum number of concurrently handshaking inbound connections.
maxAcceptConns = 10
// Maximum number of concurrently dialing outbound connections.
maxDialingConns = 10
// total timeout for encryption handshake and protocol
// handshake in both directions.
@ -52,6 +53,11 @@ type Server struct {
// connected. It must be greater than zero.
MaxPeers int
// MaxPendingPeers is the maximum number of peers that can be pending in the
// handshake phase, counted separately for inbound and outbound connections.
// Zero defaults to preset values.
MaxPendingPeers int
// Name sets the node name of this server.
// Use common.MakeName to create a name that follows existing conventions.
Name string
@ -120,7 +126,7 @@ type Server struct {
peerWG sync.WaitGroup // active peer goroutines
}
type setupFunc func(net.Conn, *ecdsa.PrivateKey, *protoHandshake, *discover.Node, bool, map[discover.NodeID]bool) (*conn, error)
type setupFunc func(net.Conn, *ecdsa.PrivateKey, *protoHandshake, *discover.Node, func(discover.NodeID) bool) (*conn, error)
type newPeerHook func(*Peer)
// Peers returns all connected peers.
@ -331,8 +337,12 @@ func (srv *Server) listenLoop() {
// This channel acts as a semaphore limiting
// active inbound connections that are lingering pre-handshake.
// If all slots are taken, no further connections are accepted.
slots := make(chan struct{}, maxAcceptConns)
for i := 0; i < maxAcceptConns; i++ {
tokens := maxAcceptConns
if srv.MaxPendingPeers > 0 {
tokens = srv.MaxPendingPeers
}
slots := make(chan struct{}, tokens)
for i := 0; i < tokens; i++ {
slots <- struct{}{}
}
@ -401,7 +411,15 @@ func (srv *Server) dialLoop() {
defer srv.loopWG.Done()
defer refresh.Stop()
// TODO: maybe limit number of active dials
// Limit the number of concurrent dials
tokens := maxDialingConns
if srv.MaxPendingPeers > 0 {
tokens = srv.MaxPendingPeers
}
slots := make(chan struct{}, tokens)
for i := 0; i < tokens; i++ {
slots <- struct{}{}
}
dial := func(dest *discover.Node) {
// Don't dial nodes that would fail the checks in addPeer.
// This is important because the connection handshake is a lot
@ -413,11 +431,14 @@ func (srv *Server) dialLoop() {
if !ok || dialing[dest.ID] {
return
}
// Request a dial slot to prevent CPU exhaustion
<-slots
dialing[dest.ID] = true
srv.peerWG.Add(1)
go func() {
srv.dialNode(dest)
slots <- struct{}{}
dialed <- dest
}()
}
@ -485,17 +506,7 @@ func (srv *Server) startPeer(fd net.Conn, dest *discover.Node) {
// the callers of startPeer added the peer to the wait group already.
fd.SetDeadline(time.Now().Add(handshakeTimeout))
// Check capacity, but override for static nodes
srv.lock.RLock()
atcap := len(srv.peers) == srv.MaxPeers
if dest != nil {
if _, ok := srv.staticNodes[dest.ID]; ok {
atcap = false
}
}
srv.lock.RUnlock()
conn, err := srv.setupFunc(fd, srv.PrivateKey, srv.ourHandshake, dest, atcap, srv.trustedNodes)
conn, err := srv.setupFunc(fd, srv.PrivateKey, srv.ourHandshake, dest, srv.keepconn)
if err != nil {
fd.Close()
glog.V(logger.Debug).Infof("Handshake with %v failed: %v", fd.RemoteAddr(), err)
@ -507,7 +518,7 @@ func (srv *Server) startPeer(fd net.Conn, dest *discover.Node) {
conn: fd, rtimeout: frameReadTimeout, wtimeout: frameWriteTimeout,
}
p := newPeer(fd, conn, srv.Protocols)
if ok, reason := srv.addPeer(conn.ID, p); !ok {
if ok, reason := srv.addPeer(conn, p); !ok {
glog.V(logger.Detail).Infof("Not adding %v (%v)\n", p, reason)
p.politeDisconnect(reason)
srv.peerWG.Done()
@ -518,6 +529,21 @@ func (srv *Server) startPeer(fd net.Conn, dest *discover.Node) {
go srv.runPeer(p)
}
// preflight checks whether a connection should be kept. it runs
// after the encryption handshake, as soon as the remote identity is
// known.
func (srv *Server) keepconn(id discover.NodeID) bool {
srv.lock.RLock()
defer srv.lock.RUnlock()
if _, ok := srv.staticNodes[id]; ok {
return true // static nodes are always allowed
}
if _, ok := srv.trustedNodes[id]; ok {
return true // trusted nodes are always allowed
}
return len(srv.peers) < srv.MaxPeers
}
func (srv *Server) runPeer(p *Peer) {
glog.V(logger.Debug).Infof("Added %v\n", p)
srvjslog.LogJson(&logger.P2PConnected{
@ -538,13 +564,18 @@ func (srv *Server) runPeer(p *Peer) {
})
}
func (srv *Server) addPeer(id discover.NodeID, p *Peer) (bool, DiscReason) {
func (srv *Server) addPeer(conn *conn, p *Peer) (bool, DiscReason) {
// drop connections with no matching protocols.
if len(srv.Protocols) > 0 && countMatchingProtocols(srv.Protocols, conn.protoHandshake.Caps) == 0 {
return false, DiscUselessPeer
}
// add the peer if it passes the other checks.
srv.lock.Lock()
defer srv.lock.Unlock()
if ok, reason := srv.checkPeer(id); !ok {
if ok, reason := srv.checkPeer(conn.ID); !ok {
return false, reason
}
srv.peers[id] = p
srv.peers[conn.ID] = p
return true, 0
}

147
p2p/server_test.go
View File

@ -22,8 +22,11 @@ func startTestServer(t *testing.T, pf newPeerHook) *Server {
ListenAddr: "127.0.0.1:0",
PrivateKey: newkey(),
newPeerHook: pf,
setupFunc: func(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
setupFunc: func(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, keepconn func(discover.NodeID) bool) (*conn, error) {
id := randomID()
if !keepconn(id) {
return nil, DiscAlreadyConnected
}
rw := newRlpxFrameRW(fd, secrets{
MAC: zero16,
AES: zero16,
@ -200,7 +203,7 @@ func TestServerDisconnectAtCap(t *testing.T) {
// Run the handshakes just like a real peer would.
key := newkey()
hs := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
_, err = setupConn(conn, key, hs, srv.Self(), false, srv.trustedNodes)
_, err = setupConn(conn, key, hs, srv.Self(), keepalways)
if i == nconns-1 {
// When handling the last connection, the server should
// disconnect immediately instead of running the protocol
@ -250,7 +253,7 @@ func TestServerStaticPeers(t *testing.T) {
// Run the handshakes just like a real peer would, and wait for completion
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
if _, err = setupConn(conn, key, shake, server.Self(), keepalways); err != nil {
t.Fatalf("conn %d: unexpected error: %v", i, err)
}
<-started
@ -344,7 +347,7 @@ func TestServerTrustedPeers(t *testing.T) {
// Run the handshakes just like a real peer would, and wait for completion
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
if _, err = setupConn(conn, key, shake, server.Self(), keepalways); err != nil {
t.Fatalf("conn %d: unexpected error: %v", i, err)
}
<-started
@ -357,7 +360,7 @@ func TestServerTrustedPeers(t *testing.T) {
defer conn.Close()
shake := &protoHandshake{Version: baseProtocolVersion, ID: trusted.ID}
if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
if _, err = setupConn(conn, key, shake, server.Self(), keepalways); err != nil {
t.Fatalf("trusted node: unexpected error: %v", err)
}
select {
@ -369,6 +372,136 @@ func TestServerTrustedPeers(t *testing.T) {
}
}
// Tests that a failed dial will temporarily throttle a peer.
func TestServerMaxPendingDials(t *testing.T) {
defer testlog(t).detach()
// Start a simple test server
server := &Server{
ListenAddr: "127.0.0.1:0",
PrivateKey: newkey(),
MaxPeers: 10,
MaxPendingPeers: 1,
}
if err := server.Start(); err != nil {
t.Fatal("failed to start test server: %v", err)
}
defer server.Stop()
// Simulate two separate remote peers
peers := make(chan *discover.Node, 2)
conns := make(chan net.Conn, 2)
for i := 0; i < 2; i++ {
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("listener %d: failed to setup: %v", i, err)
}
defer listener.Close()
addr := listener.Addr().(*net.TCPAddr)
peers <- &discover.Node{
ID: discover.PubkeyID(&newkey().PublicKey),
IP: addr.IP,
TCP: uint16(addr.Port),
}
go func() {
conn, err := listener.Accept()
if err == nil {
conns <- conn
}
}()
}
// Request a dial for both peers
go func() {
for i := 0; i < 2; i++ {
server.staticDial <- <-peers // hack piggybacking the static implementation
}
}()
// Make sure only one outbound connection goes through
var conn net.Conn
select {
case conn = <-conns:
case <-time.After(100 * time.Millisecond):
t.Fatalf("first dial timeout")
}
select {
case conn = <-conns:
t.Fatalf("second dial completed prematurely")
case <-time.After(100 * time.Millisecond):
}
// Finish the first dial, check the second
conn.Close()
select {
case conn = <-conns:
conn.Close()
case <-time.After(100 * time.Millisecond):
t.Fatalf("second dial timeout")
}
}
func TestServerMaxPendingAccepts(t *testing.T) {
defer testlog(t).detach()
// Start a test server and a peer sink for synchronization
started := make(chan *Peer)
server := &Server{
ListenAddr: "127.0.0.1:0",
PrivateKey: newkey(),
MaxPeers: 10,
MaxPendingPeers: 1,
NoDial: true,
newPeerHook: func(p *Peer) { started <- p },
}
if err := server.Start(); err != nil {
t.Fatal("failed to start test server: %v", err)
}
defer server.Stop()
// Try and connect to the server on multiple threads concurrently
conns := make([]net.Conn, 2)
for i := 0; i < 2; i++ {
dialer := &net.Dialer{Deadline: time.Now().Add(3 * time.Second)}
conn, err := dialer.Dial("tcp", server.ListenAddr)
if err != nil {
t.Fatalf("failed to dial server: %v", err)
}
conns[i] = conn
}
// Check that a handshake on the second doesn't pass
go func() {
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
if _, err := setupConn(conns[1], key, shake, server.Self(), keepalways); err != nil {
t.Fatalf("failed to run handshake: %v", err)
}
}()
select {
case <-started:
t.Fatalf("handshake on second connection accepted")
case <-time.After(time.Second):
}
// Shake on first, check that both go through
go func() {
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
if _, err := setupConn(conns[0], key, shake, server.Self(), keepalways); err != nil {
t.Fatalf("failed to run handshake: %v", err)
}
}()
for i := 0; i < 2; i++ {
select {
case <-started:
case <-time.After(time.Second):
t.Fatalf("peer %d: handshake timeout", i)
}
}
}
func newkey() *ecdsa.PrivateKey {
key, err := crypto.GenerateKey()
if err != nil {
@ -383,3 +516,7 @@ func randomID() (id discover.NodeID) {
}
return id
}
func keepalways(id discover.NodeID) bool {
return true
}