875 lines
33 KiB
Go
875 lines
33 KiB
Go
// Copyright 2021 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package downloader
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
"os"
|
|
"sync/atomic"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/eth/protocols/eth"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
)
|
|
|
|
// hookedBackfiller is a tester backfiller with all interface methods mocked and
|
|
// hooked so tests can implement only the things they need.
|
|
type hookedBackfiller struct {
|
|
// suspendHook is an optional hook to be called when the filler is requested
|
|
// to be suspended.
|
|
suspendHook func()
|
|
|
|
// resumeHook is an optional hook to be called when the filler is requested
|
|
// to be resumed.
|
|
resumeHook func()
|
|
}
|
|
|
|
// newHookedBackfiller creates a hooked backfiller with all callbacks disabled,
|
|
// essentially acting as a noop.
|
|
func newHookedBackfiller() backfiller {
|
|
return new(hookedBackfiller)
|
|
}
|
|
|
|
// suspend requests the backfiller to abort any running full or snap sync
|
|
// based on the skeleton chain as it might be invalid. The backfiller should
|
|
// gracefully handle multiple consecutive suspends without a resume, even
|
|
// on initial sartup.
|
|
func (hf *hookedBackfiller) suspend() {
|
|
if hf.suspendHook != nil {
|
|
hf.suspendHook()
|
|
}
|
|
}
|
|
|
|
// resume requests the backfiller to start running fill or snap sync based on
|
|
// the skeleton chain as it has successfully been linked. Appending new heads
|
|
// to the end of the chain will not result in suspend/resume cycles.
|
|
func (hf *hookedBackfiller) resume() {
|
|
if hf.resumeHook != nil {
|
|
hf.resumeHook()
|
|
}
|
|
}
|
|
|
|
// skeletonTestPeer is a mock peer that can only serve header requests from a
|
|
// pre-perated header chain (which may be arbitrarily wrong for testing).
|
|
//
|
|
// Requesting anything else from these peers will hard panic. Note, do *not*
|
|
// implement any other methods. We actually want to make sure that the skeleton
|
|
// syncer only depends on - and will only ever do so - on header requests.
|
|
type skeletonTestPeer struct {
|
|
id string // Unique identifier of the mock peer
|
|
headers []*types.Header // Headers to serve when requested
|
|
|
|
serve func(origin uint64) []*types.Header // Hook to allow custom responses
|
|
|
|
served uint64 // Number of headers served by this peer
|
|
dropped uint64 // Flag whether the peer was dropped (stop responding)
|
|
}
|
|
|
|
// newSkeletonTestPeer creates a new mock peer to test the skeleton sync with.
|
|
func newSkeletonTestPeer(id string, headers []*types.Header) *skeletonTestPeer {
|
|
return &skeletonTestPeer{
|
|
id: id,
|
|
headers: headers,
|
|
}
|
|
}
|
|
|
|
// newSkeletonTestPeer creates a new mock peer to test the skeleton sync with,
|
|
// and sets an optional serve hook that can return headers for delivery instead
|
|
// of the predefined chain. Useful for emulating malicious behavior that would
|
|
// otherwise require dedicated peer types.
|
|
func newSkeletonTestPeerWithHook(id string, headers []*types.Header, serve func(origin uint64) []*types.Header) *skeletonTestPeer {
|
|
return &skeletonTestPeer{
|
|
id: id,
|
|
headers: headers,
|
|
serve: serve,
|
|
}
|
|
}
|
|
|
|
// RequestHeadersByNumber constructs a GetBlockHeaders function based on a numbered
|
|
// origin; associated with a particular peer in the download tester. The returned
|
|
// function can be used to retrieve batches of headers from the particular peer.
|
|
func (p *skeletonTestPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool, sink chan *eth.Response) (*eth.Request, error) {
|
|
// Since skeleton test peer are in-memory mocks, dropping the does not make
|
|
// them inaccepssible. As such, check a local `dropped` field to see if the
|
|
// peer has been dropped and should not respond any more.
|
|
if atomic.LoadUint64(&p.dropped) != 0 {
|
|
return nil, errors.New("peer already dropped")
|
|
}
|
|
// Skeleton sync retrieves batches of headers going backward without gaps.
|
|
// This ensures we can follow a clean parent progression without any reorg
|
|
// hiccups. There is no need for any other type of header retrieval, so do
|
|
// panic if there's such a request.
|
|
if !reverse || skip != 0 {
|
|
// Note, if other clients want to do these kinds of requests, it's their
|
|
// problem, it will still work. We just don't want *us* making complicated
|
|
// requests without a very strong reason to.
|
|
panic(fmt.Sprintf("invalid header retrieval: reverse %v, want true; skip %d, want 0", reverse, skip))
|
|
}
|
|
// If the skeleton syncer requests the genesis block, panic. Whilst it could
|
|
// be considered a valid request, our code specifically should not request it
|
|
// ever since we want to link up headers to an existing local chain, which at
|
|
// worse will be the genesis.
|
|
if int64(origin)-int64(amount) < 0 {
|
|
panic(fmt.Sprintf("headers requested before (or at) genesis: origin %d, amount %d", origin, amount))
|
|
}
|
|
// To make concurrency easier, the skeleton syncer always requests fixed size
|
|
// batches of headers. Panic if the peer is requested an amount other than the
|
|
// configured batch size (apart from the request leading to the genesis).
|
|
if amount > requestHeaders || (amount < requestHeaders && origin > uint64(amount)) {
|
|
panic(fmt.Sprintf("non-chunk size header batch requested: requested %d, want %d, origin %d", amount, requestHeaders, origin))
|
|
}
|
|
// Simple reverse header retrieval. Fill from the peer's chain and return.
|
|
// If the tester has a serve hook set, try to use that before falling back
|
|
// to the default behavior.
|
|
var headers []*types.Header
|
|
if p.serve != nil {
|
|
headers = p.serve(origin)
|
|
}
|
|
if headers == nil {
|
|
headers = make([]*types.Header, 0, amount)
|
|
if len(p.headers) > int(origin) { // Don't serve headers if we're missing the origin
|
|
for i := 0; i < amount; i++ {
|
|
// Consider nil headers as a form of attack and withhold them. Nil
|
|
// cannot be decoded from RLP, so it's not possible to produce an
|
|
// attack by sending/receiving those over eth.
|
|
header := p.headers[int(origin)-i]
|
|
if header == nil {
|
|
continue
|
|
}
|
|
headers = append(headers, header)
|
|
}
|
|
}
|
|
}
|
|
atomic.AddUint64(&p.served, uint64(len(headers)))
|
|
|
|
hashes := make([]common.Hash, len(headers))
|
|
for i, header := range headers {
|
|
hashes[i] = header.Hash()
|
|
}
|
|
// Deliver the headers to the downloader
|
|
req := ð.Request{
|
|
Peer: p.id,
|
|
}
|
|
res := ð.Response{
|
|
Req: req,
|
|
Res: (*eth.BlockHeadersPacket)(&headers),
|
|
Meta: hashes,
|
|
Time: 1,
|
|
Done: make(chan error),
|
|
}
|
|
go func() {
|
|
sink <- res
|
|
if err := <-res.Done; err != nil {
|
|
log.Warn("Skeleton test peer response rejected", "err", err)
|
|
atomic.AddUint64(&p.dropped, 1)
|
|
}
|
|
}()
|
|
return req, nil
|
|
}
|
|
|
|
func (p *skeletonTestPeer) Head() (common.Hash, *big.Int) {
|
|
panic("skeleton sync must not request the remote head")
|
|
}
|
|
|
|
func (p *skeletonTestPeer) RequestHeadersByHash(common.Hash, int, int, bool, chan *eth.Response) (*eth.Request, error) {
|
|
panic("skeleton sync must not request headers by hash")
|
|
}
|
|
|
|
func (p *skeletonTestPeer) RequestBodies([]common.Hash, chan *eth.Response) (*eth.Request, error) {
|
|
panic("skeleton sync must not request block bodies")
|
|
}
|
|
|
|
func (p *skeletonTestPeer) RequestReceipts([]common.Hash, chan *eth.Response) (*eth.Request, error) {
|
|
panic("skeleton sync must not request receipts")
|
|
}
|
|
|
|
// Tests various sync initialzations based on previous leftovers in the database
|
|
// and announced heads.
|
|
func TestSkeletonSyncInit(t *testing.T) {
|
|
// Create a few key headers
|
|
var (
|
|
genesis = &types.Header{Number: big.NewInt(0)}
|
|
block49 = &types.Header{Number: big.NewInt(49)}
|
|
block49B = &types.Header{Number: big.NewInt(49), Extra: []byte("B")}
|
|
block50 = &types.Header{Number: big.NewInt(50), ParentHash: block49.Hash()}
|
|
)
|
|
tests := []struct {
|
|
headers []*types.Header // Database content (beside the genesis)
|
|
oldstate []*subchain // Old sync state with various interrupted subchains
|
|
head *types.Header // New head header to announce to reorg to
|
|
newstate []*subchain // Expected sync state after the reorg
|
|
}{
|
|
// Completely empty database with only the genesis set. The sync is expected
|
|
// to create a single subchain with the requested head.
|
|
{
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 50}},
|
|
},
|
|
// Empty database with only the genesis set with a leftover empty sync
|
|
// progess. This is a synthetic case, just for the sake of covering things.
|
|
{
|
|
oldstate: []*subchain{},
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 50}},
|
|
},
|
|
// A single leftover subchain is present, older than the new head. The
|
|
// old subchain should be left as is and a new one appended to the sync
|
|
// status.
|
|
{
|
|
oldstate: []*subchain{{Head: 10, Tail: 5}},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
},
|
|
// Multiple leftover subchains are present, older than the new head. The
|
|
// old subchains should be left as is and a new one appended to the sync
|
|
// status.
|
|
{
|
|
oldstate: []*subchain{
|
|
{Head: 20, Tail: 15},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 20, Tail: 15},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
},
|
|
// A single leftover subchain is present, newer than the new head. The
|
|
// newer subchain should be deleted and a fresh one created for the head.
|
|
{
|
|
oldstate: []*subchain{{Head: 65, Tail: 60}},
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 50}},
|
|
},
|
|
// Multiple leftover subchain is present, newer than the new head. The
|
|
// newer subchains should be deleted and a fresh one created for the head.
|
|
{
|
|
oldstate: []*subchain{
|
|
{Head: 75, Tail: 70},
|
|
{Head: 65, Tail: 60},
|
|
},
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 50}},
|
|
},
|
|
|
|
// Two leftover subchains are present, one fully older and one fully
|
|
// newer than the announced head. The head should delete the newer one,
|
|
// keeping the older one.
|
|
{
|
|
oldstate: []*subchain{
|
|
{Head: 65, Tail: 60},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
},
|
|
// Multiple leftover subchains are present, some fully older and some
|
|
// fully newer than the announced head. The head should delete the newer
|
|
// ones, keeping the older ones.
|
|
{
|
|
oldstate: []*subchain{
|
|
{Head: 75, Tail: 70},
|
|
{Head: 65, Tail: 60},
|
|
{Head: 20, Tail: 15},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 20, Tail: 15},
|
|
{Head: 10, Tail: 5},
|
|
},
|
|
},
|
|
// A single leftover subchain is present and the new head is extending
|
|
// it with one more header. We expect the subchain head to be pushed
|
|
// forward.
|
|
{
|
|
headers: []*types.Header{block49},
|
|
oldstate: []*subchain{{Head: 49, Tail: 5}},
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 5}},
|
|
},
|
|
// A single leftover subchain is present and although the new head does
|
|
// extend it number wise, the hash chain does not link up. We expect a
|
|
// new subchain to be created for the dangling head.
|
|
{
|
|
headers: []*types.Header{block49B},
|
|
oldstate: []*subchain{{Head: 49, Tail: 5}},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 49, Tail: 5},
|
|
},
|
|
},
|
|
// A single leftover subchain is present. A new head is announced that
|
|
// links into the middle of it, correctly anchoring into an existing
|
|
// header. We expect the old subchain to be truncated and extended with
|
|
// the new head.
|
|
{
|
|
headers: []*types.Header{block49},
|
|
oldstate: []*subchain{{Head: 100, Tail: 5}},
|
|
head: block50,
|
|
newstate: []*subchain{{Head: 50, Tail: 5}},
|
|
},
|
|
// A single leftover subchain is present. A new head is announced that
|
|
// links into the middle of it, but does not anchor into an existing
|
|
// header. We expect the old subchain to be truncated and a new chain
|
|
// be created for the dangling head.
|
|
{
|
|
headers: []*types.Header{block49B},
|
|
oldstate: []*subchain{{Head: 100, Tail: 5}},
|
|
head: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
{Head: 49, Tail: 5},
|
|
},
|
|
},
|
|
}
|
|
for i, tt := range tests {
|
|
// Create a fresh database and initialize it with the starting state
|
|
db := rawdb.NewMemoryDatabase()
|
|
|
|
rawdb.WriteHeader(db, genesis)
|
|
for _, header := range tt.headers {
|
|
rawdb.WriteSkeletonHeader(db, header)
|
|
}
|
|
if tt.oldstate != nil {
|
|
blob, _ := json.Marshal(&skeletonProgress{Subchains: tt.oldstate})
|
|
rawdb.WriteSkeletonSyncStatus(db, blob)
|
|
}
|
|
// Create a skeleton sync and run a cycle
|
|
wait := make(chan struct{})
|
|
|
|
skeleton := newSkeleton(db, newPeerSet(), nil, newHookedBackfiller())
|
|
skeleton.syncStarting = func() { close(wait) }
|
|
skeleton.Sync(tt.head, true)
|
|
|
|
<-wait
|
|
skeleton.Terminate()
|
|
|
|
// Ensure the correct resulting sync status
|
|
var progress skeletonProgress
|
|
json.Unmarshal(rawdb.ReadSkeletonSyncStatus(db), &progress)
|
|
|
|
if len(progress.Subchains) != len(tt.newstate) {
|
|
t.Errorf("test %d: subchain count mismatch: have %d, want %d", i, len(progress.Subchains), len(tt.newstate))
|
|
continue
|
|
}
|
|
for j := 0; j < len(progress.Subchains); j++ {
|
|
if progress.Subchains[j].Head != tt.newstate[j].Head {
|
|
t.Errorf("test %d: subchain %d head mismatch: have %d, want %d", i, j, progress.Subchains[j].Head, tt.newstate[j].Head)
|
|
}
|
|
if progress.Subchains[j].Tail != tt.newstate[j].Tail {
|
|
t.Errorf("test %d: subchain %d tail mismatch: have %d, want %d", i, j, progress.Subchains[j].Tail, tt.newstate[j].Tail)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Tests that a running skeleton sync can be extended with properly linked up
|
|
// headers but not with side chains.
|
|
func TestSkeletonSyncExtend(t *testing.T) {
|
|
// Create a few key headers
|
|
var (
|
|
genesis = &types.Header{Number: big.NewInt(0)}
|
|
block49 = &types.Header{Number: big.NewInt(49)}
|
|
block49B = &types.Header{Number: big.NewInt(49), Extra: []byte("B")}
|
|
block50 = &types.Header{Number: big.NewInt(50), ParentHash: block49.Hash()}
|
|
block51 = &types.Header{Number: big.NewInt(51), ParentHash: block50.Hash()}
|
|
)
|
|
tests := []struct {
|
|
head *types.Header // New head header to announce to reorg to
|
|
extend *types.Header // New head header to announce to extend with
|
|
newstate []*subchain // Expected sync state after the reorg
|
|
err error // Whether extension succeeds or not
|
|
}{
|
|
// Initialize a sync and try to extend it with a subsequent block.
|
|
{
|
|
head: block49,
|
|
extend: block50,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 49},
|
|
},
|
|
},
|
|
// Initialize a sync and try to extend it with the existing head block.
|
|
{
|
|
head: block49,
|
|
extend: block49,
|
|
newstate: []*subchain{
|
|
{Head: 49, Tail: 49},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
// Initialize a sync and try to extend it with a sibling block.
|
|
{
|
|
head: block49,
|
|
extend: block49B,
|
|
newstate: []*subchain{
|
|
{Head: 49, Tail: 49},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
// Initialize a sync and try to extend it with a number-wise sequential
|
|
// header, but a hash wise non-linking one.
|
|
{
|
|
head: block49B,
|
|
extend: block50,
|
|
newstate: []*subchain{
|
|
{Head: 49, Tail: 49},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
// Initialize a sync and try to extend it with a non-linking future block.
|
|
{
|
|
head: block49,
|
|
extend: block51,
|
|
newstate: []*subchain{
|
|
{Head: 49, Tail: 49},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
// Initialize a sync and try to extend it with a past canonical block.
|
|
{
|
|
head: block50,
|
|
extend: block49,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
// Initialize a sync and try to extend it with a past sidechain block.
|
|
{
|
|
head: block50,
|
|
extend: block49B,
|
|
newstate: []*subchain{
|
|
{Head: 50, Tail: 50},
|
|
},
|
|
err: errReorgDenied,
|
|
},
|
|
}
|
|
for i, tt := range tests {
|
|
// Create a fresh database and initialize it with the starting state
|
|
db := rawdb.NewMemoryDatabase()
|
|
rawdb.WriteHeader(db, genesis)
|
|
|
|
// Create a skeleton sync and run a cycle
|
|
wait := make(chan struct{})
|
|
|
|
skeleton := newSkeleton(db, newPeerSet(), nil, newHookedBackfiller())
|
|
skeleton.syncStarting = func() { close(wait) }
|
|
skeleton.Sync(tt.head, true)
|
|
|
|
<-wait
|
|
if err := skeleton.Sync(tt.extend, false); err != tt.err {
|
|
t.Errorf("extension failure mismatch: have %v, want %v", err, tt.err)
|
|
}
|
|
skeleton.Terminate()
|
|
|
|
// Ensure the correct resulting sync status
|
|
var progress skeletonProgress
|
|
json.Unmarshal(rawdb.ReadSkeletonSyncStatus(db), &progress)
|
|
|
|
if len(progress.Subchains) != len(tt.newstate) {
|
|
t.Errorf("test %d: subchain count mismatch: have %d, want %d", i, len(progress.Subchains), len(tt.newstate))
|
|
continue
|
|
}
|
|
for j := 0; j < len(progress.Subchains); j++ {
|
|
if progress.Subchains[j].Head != tt.newstate[j].Head {
|
|
t.Errorf("test %d: subchain %d head mismatch: have %d, want %d", i, j, progress.Subchains[j].Head, tt.newstate[j].Head)
|
|
}
|
|
if progress.Subchains[j].Tail != tt.newstate[j].Tail {
|
|
t.Errorf("test %d: subchain %d tail mismatch: have %d, want %d", i, j, progress.Subchains[j].Tail, tt.newstate[j].Tail)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Tests that the skeleton sync correctly retrieves headers from one or more
|
|
// peers without duplicates or other strange side effects.
|
|
func TestSkeletonSyncRetrievals(t *testing.T) {
|
|
log.Root().SetHandler(log.LvlFilterHandler(log.LvlTrace, log.StreamHandler(os.Stderr, log.TerminalFormat(true))))
|
|
|
|
// Since skeleton headers don't need to be meaningful, beyond a parent hash
|
|
// progression, create a long fake chain to test with.
|
|
chain := []*types.Header{{Number: big.NewInt(0)}}
|
|
for i := 1; i < 10000; i++ {
|
|
chain = append(chain, &types.Header{
|
|
ParentHash: chain[i-1].Hash(),
|
|
Number: big.NewInt(int64(i)),
|
|
})
|
|
}
|
|
tests := []struct {
|
|
headers []*types.Header // Database content (beside the genesis)
|
|
oldstate []*subchain // Old sync state with various interrupted subchains
|
|
|
|
head *types.Header // New head header to announce to reorg to
|
|
peers []*skeletonTestPeer // Initial peer set to start the sync with
|
|
midstate []*subchain // Expected sync state after initial cycle
|
|
midserve uint64 // Expected number of header retrievals after initial cycle
|
|
middrop uint64 // Expectd number of peers dropped after initial cycle
|
|
|
|
newHead *types.Header // New header to annount on top of the old one
|
|
newPeer *skeletonTestPeer // New peer to join the skeleton syncer
|
|
endstate []*subchain // Expected sync state after the post-init event
|
|
endserve uint64 // Expected number of header retrievals after the post-init event
|
|
enddrop uint64 // Expectd number of peers dropped after the post-init event
|
|
}{
|
|
// Completely empty database with only the genesis set. The sync is expected
|
|
// to create a single subchain with the requested head. No peers however, so
|
|
// the sync should be stuck without any progression.
|
|
//
|
|
// When a new peer is added, it should detect the join and fill the headers
|
|
// to the genesis block.
|
|
{
|
|
head: chain[len(chain)-1],
|
|
midstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: uint64(len(chain) - 1)}},
|
|
|
|
newPeer: newSkeletonTestPeer("test-peer", chain),
|
|
endstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: 1}},
|
|
endserve: uint64(len(chain) - 2), // len - head - genesis
|
|
},
|
|
// Completely empty database with only the genesis set. The sync is expected
|
|
// to create a single subchain with the requested head. With one valid peer,
|
|
// the sync is expected to complete already in the initial round.
|
|
//
|
|
// Adding a second peer should not have any effect.
|
|
{
|
|
head: chain[len(chain)-1],
|
|
peers: []*skeletonTestPeer{newSkeletonTestPeer("test-peer-1", chain)},
|
|
midstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: 1}},
|
|
midserve: uint64(len(chain) - 2), // len - head - genesis
|
|
|
|
newPeer: newSkeletonTestPeer("test-peer-2", chain),
|
|
endstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: 1}},
|
|
endserve: uint64(len(chain) - 2), // len - head - genesis
|
|
},
|
|
// Completely empty database with only the genesis set. The sync is expected
|
|
// to create a single subchain with the requested head. With many valid peers,
|
|
// the sync is expected to complete already in the initial round.
|
|
//
|
|
// Adding a new peer should not have any effect.
|
|
{
|
|
head: chain[len(chain)-1],
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("test-peer-1", chain),
|
|
newSkeletonTestPeer("test-peer-2", chain),
|
|
newSkeletonTestPeer("test-peer-3", chain),
|
|
},
|
|
midstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: 1}},
|
|
midserve: uint64(len(chain) - 2), // len - head - genesis
|
|
|
|
newPeer: newSkeletonTestPeer("test-peer-4", chain),
|
|
endstate: []*subchain{{Head: uint64(len(chain) - 1), Tail: 1}},
|
|
endserve: uint64(len(chain) - 2), // len - head - genesis
|
|
},
|
|
// This test checks if a peer tries to withhold a header - *on* the sync
|
|
// boundary - instead of sending the requested amount. The malicious short
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100],
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-skipper", append(append(append([]*types.Header{}, chain[:99]...), nil), chain[100:]...)),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 3, // len - head - genesis - missing
|
|
middrop: 1, // penalize shortened header deliveries
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 3) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test checks if a peer tries to withhold a header - *off* the sync
|
|
// boundary - instead of sending the requested amount. The malicious short
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100],
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-skipper", append(append(append([]*types.Header{}, chain[:50]...), nil), chain[51:]...)),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 3, // len - head - genesis - missing
|
|
middrop: 1, // penalize shortened header deliveries
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 3) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test checks if a peer tries to duplicate a header - *on* the sync
|
|
// boundary - instead of sending the correct sequence. The malicious duped
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100], // We want to force the 100th header to be a request boundary
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-duper", append(append(append([]*types.Header{}, chain[:99]...), chain[98]), chain[100:]...)),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 2, // len - head - genesis
|
|
middrop: 1, // penalize invalid header sequences
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 2) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test checks if a peer tries to duplicate a header - *off* the sync
|
|
// boundary - instead of sending the correct sequence. The malicious duped
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100], // We want to force the 100th header to be a request boundary
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-duper", append(append(append([]*types.Header{}, chain[:50]...), chain[49]), chain[51:]...)),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 2, // len - head - genesis
|
|
middrop: 1, // penalize invalid header sequences
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 2) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test checks if a peer tries to inject a different header - *on*
|
|
// the sync boundary - instead of sending the correct sequence. The bad
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100], // We want to force the 100th header to be a request boundary
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-changer",
|
|
append(
|
|
append(
|
|
append([]*types.Header{}, chain[:99]...),
|
|
&types.Header{
|
|
ParentHash: chain[98].Hash(),
|
|
Number: big.NewInt(int64(99)),
|
|
GasLimit: 1,
|
|
},
|
|
), chain[100:]...,
|
|
),
|
|
),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 2, // len - head - genesis
|
|
middrop: 1, // different set of headers, drop // TODO(karalabe): maybe just diff sync?
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 2) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test checks if a peer tries to inject a different header - *off*
|
|
// the sync boundary - instead of sending the correct sequence. The bad
|
|
// package should not be accepted.
|
|
//
|
|
// Joining with a new peer should however unblock the sync.
|
|
{
|
|
head: chain[requestHeaders+100], // We want to force the 100th header to be a request boundary
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeer("header-changer",
|
|
append(
|
|
append(
|
|
append([]*types.Header{}, chain[:50]...),
|
|
&types.Header{
|
|
ParentHash: chain[49].Hash(),
|
|
Number: big.NewInt(int64(50)),
|
|
GasLimit: 1,
|
|
},
|
|
), chain[51:]...,
|
|
),
|
|
),
|
|
},
|
|
midstate: []*subchain{{Head: requestHeaders + 100, Tail: 100}},
|
|
midserve: requestHeaders + 101 - 2, // len - head - genesis
|
|
middrop: 1, // different set of headers, drop
|
|
|
|
newPeer: newSkeletonTestPeer("good-peer", chain),
|
|
endstate: []*subchain{{Head: requestHeaders + 100, Tail: 1}},
|
|
endserve: (requestHeaders + 101 - 2) + (100 - 1), // midserve + lenrest - genesis
|
|
enddrop: 1, // no new drops
|
|
},
|
|
// This test reproduces a bug caught during review (kudos to @holiman)
|
|
// where a subchain is merged with a previously interrupted one, causing
|
|
// pending data in the scratch space to become "invalid" (since we jump
|
|
// ahead during subchain merge). In that case it is expected to ignore
|
|
// the queued up data instead of trying to process on top of a shifted
|
|
// task set.
|
|
//
|
|
// The test is a bit convoluted since it needs to trigger a concurrency
|
|
// issue. First we sync up an initial chain of 2x512 items. Then announce
|
|
// 2x512+2 as head and delay delivering the head batch to fill the scratch
|
|
// space first. The delivery head should merge with the previous download
|
|
// and the scratch space must not be consumed further.
|
|
{
|
|
head: chain[2*requestHeaders],
|
|
peers: []*skeletonTestPeer{
|
|
newSkeletonTestPeerWithHook("peer-1", chain, func(origin uint64) []*types.Header {
|
|
if origin == chain[2*requestHeaders+1].Number.Uint64() {
|
|
time.Sleep(100 * time.Millisecond)
|
|
}
|
|
return nil // Fallback to default behavior, just delayed
|
|
}),
|
|
newSkeletonTestPeerWithHook("peer-2", chain, func(origin uint64) []*types.Header {
|
|
if origin == chain[2*requestHeaders+1].Number.Uint64() {
|
|
time.Sleep(100 * time.Millisecond)
|
|
}
|
|
return nil // Fallback to default behavior, just delayed
|
|
}),
|
|
},
|
|
midstate: []*subchain{{Head: 2 * requestHeaders, Tail: 1}},
|
|
midserve: 2*requestHeaders - 1, // len - head - genesis
|
|
|
|
newHead: chain[2*requestHeaders+2],
|
|
endstate: []*subchain{{Head: 2*requestHeaders + 2, Tail: 1}},
|
|
endserve: 4 * requestHeaders,
|
|
},
|
|
}
|
|
for i, tt := range tests {
|
|
// Create a fresh database and initialize it with the starting state
|
|
db := rawdb.NewMemoryDatabase()
|
|
rawdb.WriteHeader(db, chain[0])
|
|
|
|
// Create a peer set to feed headers through
|
|
peerset := newPeerSet()
|
|
for _, peer := range tt.peers {
|
|
peerset.Register(newPeerConnection(peer.id, eth.ETH66, peer, log.New("id", peer.id)))
|
|
}
|
|
// Create a peer dropper to track malicious peers
|
|
dropped := make(map[string]int)
|
|
drop := func(peer string) {
|
|
if p := peerset.Peer(peer); p != nil {
|
|
atomic.AddUint64(&p.peer.(*skeletonTestPeer).dropped, 1)
|
|
}
|
|
peerset.Unregister(peer)
|
|
dropped[peer]++
|
|
}
|
|
// Create a skeleton sync and run a cycle
|
|
skeleton := newSkeleton(db, peerset, drop, newHookedBackfiller())
|
|
skeleton.Sync(tt.head, true)
|
|
|
|
// Wait a bit (bleah) for the initial sync loop to go to idle. This might
|
|
// be either a finish or a never-start hence why there's no event to hook.
|
|
time.Sleep(250 * time.Millisecond)
|
|
|
|
// Check the post-init mid state if it matches the required results
|
|
var progress skeletonProgress
|
|
json.Unmarshal(rawdb.ReadSkeletonSyncStatus(db), &progress)
|
|
|
|
if len(progress.Subchains) != len(tt.midstate) {
|
|
t.Errorf("test %d, mid state: subchain count mismatch: have %d, want %d", i, len(progress.Subchains), len(tt.midstate))
|
|
continue
|
|
}
|
|
for j := 0; j < len(progress.Subchains); j++ {
|
|
if progress.Subchains[j].Head != tt.midstate[j].Head {
|
|
t.Errorf("test %d, mid state: subchain %d head mismatch: have %d, want %d", i, j, progress.Subchains[j].Head, tt.midstate[j].Head)
|
|
}
|
|
if progress.Subchains[j].Tail != tt.midstate[j].Tail {
|
|
t.Errorf("test %d, mid state: subchain %d tail mismatch: have %d, want %d", i, j, progress.Subchains[j].Tail, tt.midstate[j].Tail)
|
|
}
|
|
}
|
|
var served uint64
|
|
for _, peer := range tt.peers {
|
|
served += atomic.LoadUint64(&peer.served)
|
|
}
|
|
if served != tt.midserve {
|
|
t.Errorf("test %d, mid state: served headers mismatch: have %d, want %d", i, served, tt.midserve)
|
|
}
|
|
var drops uint64
|
|
for _, peer := range tt.peers {
|
|
drops += atomic.LoadUint64(&peer.dropped)
|
|
}
|
|
if drops != tt.middrop {
|
|
t.Errorf("test %d, mid state: dropped peers mismatch: have %d, want %d", i, drops, tt.middrop)
|
|
}
|
|
// Apply the post-init events if there's any
|
|
if tt.newHead != nil {
|
|
skeleton.Sync(tt.newHead, true)
|
|
}
|
|
if tt.newPeer != nil {
|
|
if err := peerset.Register(newPeerConnection(tt.newPeer.id, eth.ETH66, tt.newPeer, log.New("id", tt.newPeer.id))); err != nil {
|
|
t.Errorf("test %d: failed to register new peer: %v", i, err)
|
|
}
|
|
}
|
|
// Wait a bit (bleah) for the second sync loop to go to idle. This might
|
|
// be either a finish or a never-start hence why there's no event to hook.
|
|
time.Sleep(250 * time.Millisecond)
|
|
|
|
// Check the post-init mid state if it matches the required results
|
|
json.Unmarshal(rawdb.ReadSkeletonSyncStatus(db), &progress)
|
|
|
|
if len(progress.Subchains) != len(tt.endstate) {
|
|
t.Errorf("test %d, end state: subchain count mismatch: have %d, want %d", i, len(progress.Subchains), len(tt.endstate))
|
|
continue
|
|
}
|
|
for j := 0; j < len(progress.Subchains); j++ {
|
|
if progress.Subchains[j].Head != tt.endstate[j].Head {
|
|
t.Errorf("test %d, end state: subchain %d head mismatch: have %d, want %d", i, j, progress.Subchains[j].Head, tt.endstate[j].Head)
|
|
}
|
|
if progress.Subchains[j].Tail != tt.endstate[j].Tail {
|
|
t.Errorf("test %d, end state: subchain %d tail mismatch: have %d, want %d", i, j, progress.Subchains[j].Tail, tt.endstate[j].Tail)
|
|
}
|
|
}
|
|
// Check that the peers served no more headers than we actually needed
|
|
served = 0
|
|
for _, peer := range tt.peers {
|
|
served += atomic.LoadUint64(&peer.served)
|
|
}
|
|
if tt.newPeer != nil {
|
|
served += atomic.LoadUint64(&tt.newPeer.served)
|
|
}
|
|
if served != tt.endserve {
|
|
t.Errorf("test %d, end state: served headers mismatch: have %d, want %d", i, served, tt.endserve)
|
|
}
|
|
drops = 0
|
|
for _, peer := range tt.peers {
|
|
drops += atomic.LoadUint64(&peer.dropped)
|
|
}
|
|
if tt.newPeer != nil {
|
|
drops += atomic.LoadUint64(&tt.newPeer.dropped)
|
|
}
|
|
if drops != tt.middrop {
|
|
t.Errorf("test %d, end state: dropped peers mismatch: have %d, want %d", i, drops, tt.middrop)
|
|
}
|
|
// Clean up any leftover skeleton sync resources
|
|
skeleton.Terminate()
|
|
}
|
|
}
|