plugeth/eth/protocol_test.go

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package eth
import (
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"log"
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"math/big"
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"os"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/errs"
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ethlogger "github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
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)
var logsys = ethlogger.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlogger.LogLevel(ethlogger.DebugDetailLevel))
var ini = false
func logInit() {
if !ini {
ethlogger.AddLogSystem(logsys)
ini = true
}
}
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type testTxPool struct {
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getTransactions func() []*types.Transaction
addTransactions func(txs []*types.Transaction)
}
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type testChainManager struct {
getBlockHashes func(hash common.Hash, amount uint64) (hashes []common.Hash)
getBlock func(hash common.Hash) *types.Block
status func() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
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}
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type testBlockPool struct {
addBlockHashes func(next func() (common.Hash, bool), peerId string)
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addBlock func(block *types.Block, peerId string) (err error)
addPeer func(td *big.Int, currentBlock common.Hash, peerId string, requestHashes func(common.Hash) error, requestBlocks func([]common.Hash) error, peerError func(*errs.Error)) (best bool, suspended bool)
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removePeer func(peerId string)
}
func (self *testTxPool) AddTransactions(txs []*types.Transaction) {
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if self.addTransactions != nil {
self.addTransactions(txs)
}
}
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func (self *testTxPool) GetTransactions() types.Transactions { return nil }
func (self *testChainManager) GetBlockHashesFromHash(hash common.Hash, amount uint64) (hashes []common.Hash) {
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if self.getBlockHashes != nil {
hashes = self.getBlockHashes(hash, amount)
}
return
}
func (self *testChainManager) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
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if self.status != nil {
td, currentBlock, genesisBlock = self.status()
} else {
td = common.Big1
currentBlock = common.Hash{1}
genesisBlock = common.Hash{2}
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}
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return
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}
func (self *testChainManager) GetBlock(hash common.Hash) (block *types.Block) {
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if self.getBlock != nil {
block = self.getBlock(hash)
}
return
}
func (self *testBlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId string) {
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if self.addBlockHashes != nil {
self.addBlockHashes(next, peerId)
}
}
func (self *testBlockPool) AddBlock(block *types.Block, peerId string) {
if self.addBlock != nil {
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self.addBlock(block, peerId)
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}
}
func (self *testBlockPool) AddPeer(td *big.Int, currentBlock common.Hash, peerId string, requestBlockHashes func(common.Hash) error, requestBlocks func([]common.Hash) error, peerError func(*errs.Error)) (best bool, suspended bool) {
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if self.addPeer != nil {
best, suspended = self.addPeer(td, currentBlock, peerId, requestBlockHashes, requestBlocks, peerError)
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}
return
}
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func (self *testBlockPool) RemovePeer(peerId string) {
if self.removePeer != nil {
self.removePeer(peerId)
}
}
func testPeer() *p2p.Peer {
var id discover.NodeID
pk := crypto.GenerateNewKeyPair().PublicKey
copy(id[:], pk)
return p2p.NewPeer(id, "test peer", []p2p.Cap{})
}
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type ethProtocolTester struct {
p2p.MsgReadWriter // writing to the tester feeds the protocol
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quit chan error
pipe *p2p.MsgPipeRW // the protocol read/writes on this end
txPool *testTxPool // txPool
chainManager *testChainManager // chainManager
blockPool *testBlockPool // blockPool
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t *testing.T
}
func newEth(t *testing.T) *ethProtocolTester {
p1, p2 := p2p.MsgPipe()
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return &ethProtocolTester{
MsgReadWriter: p1,
quit: make(chan error, 1),
pipe: p2,
txPool: &testTxPool{},
chainManager: &testChainManager{},
blockPool: &testBlockPool{},
t: t,
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}
}
func (self *ethProtocolTester) reset() {
self.pipe.Close()
p1, p2 := p2p.MsgPipe()
self.MsgReadWriter = p1
self.pipe = p2
self.quit = make(chan error, 1)
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}
func (self *ethProtocolTester) checkError(expCode int, delay time.Duration) (err error) {
var timer = time.After(delay)
select {
case err = <-self.quit:
case <-timer:
self.t.Errorf("no error after %v, expected %v", delay, expCode)
return
}
perr, ok := err.(*errs.Error)
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if ok && perr != nil {
if code := perr.Code; code != expCode {
self.t.Errorf("expected protocol error (code %v), got %v (%v)", expCode, code, err)
}
} else {
self.t.Errorf("expected protocol error (code %v), got %v", expCode, err)
}
return
}
func (self *ethProtocolTester) run() {
err := runEthProtocol(ProtocolVersion, NetworkId, self.txPool, self.chainManager, self.blockPool, testPeer(), self.pipe)
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self.quit <- err
}
func (self *ethProtocolTester) handshake(t *testing.T, mock bool) {
td, currentBlock, genesis := self.chainManager.Status()
// first outgoing msg should be StatusMsg.
err := p2p.ExpectMsg(self, StatusMsg, &statusMsgData{
ProtocolVersion: ProtocolVersion,
NetworkId: NetworkId,
TD: td,
CurrentBlock: currentBlock,
GenesisBlock: genesis,
})
if err != nil {
t.Fatalf("incorrect outgoing status: %v", err)
}
if mock {
go p2p.Send(self, StatusMsg, &statusMsgData{ProtocolVersion, NetworkId, td, currentBlock, genesis})
}
}
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func TestStatusMsgErrors(t *testing.T) {
logInit()
eth := newEth(t)
go eth.run()
td, currentBlock, genesis := eth.chainManager.Status()
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tests := []struct {
code uint64
data interface{}
wantErrorCode int
}{
{
code: TxMsg, data: []interface{}{},
wantErrorCode: ErrNoStatusMsg,
},
{
code: StatusMsg, data: statusMsgData{10, NetworkId, td, currentBlock, genesis},
wantErrorCode: ErrProtocolVersionMismatch,
},
{
code: StatusMsg, data: statusMsgData{ProtocolVersion, 999, td, currentBlock, genesis},
wantErrorCode: ErrNetworkIdMismatch,
},
{
code: StatusMsg, data: statusMsgData{ProtocolVersion, NetworkId, td, currentBlock, common.Hash{3}},
wantErrorCode: ErrGenesisBlockMismatch,
},
}
for _, test := range tests {
eth.handshake(t, false)
// the send call might hang until reset because
// the protocol might not read the payload.
go p2p.Send(eth, test.code, test.data)
eth.checkError(test.wantErrorCode, 1*time.Second)
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eth.reset()
go eth.run()
}
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}
func TestNewBlockMsg(t *testing.T) {
// logInit()
eth := newEth(t)
var disconnected bool
eth.blockPool.removePeer = func(peerId string) {
disconnected = true
}
go eth.run()
eth.handshake(t, true)
err := p2p.ExpectMsg(eth, TxMsg, []interface{}{})
if err != nil {
t.Errorf("transactions expected, got %v", err)
}
var tds = make(chan *big.Int)
eth.blockPool.addPeer = func(td *big.Int, currentBlock common.Hash, peerId string, requestHashes func(common.Hash) error, requestBlocks func([]common.Hash) error, peerError func(*errs.Error)) (best bool, suspended bool) {
tds <- td
return
}
var delay = 1 * time.Second
// eth.reset()
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block := types.NewBlock(common.Hash{1}, common.Address{1}, common.Hash{1}, common.Big1, 1, []byte("extra"))
go p2p.Send(eth, NewBlockMsg, &newBlockMsgData{Block: block})
timer := time.After(delay)
select {
case td := <-tds:
if td.Cmp(common.Big0) != 0 {
t.Errorf("incorrect td %v, expected %v", td, common.Big0)
}
case <-timer:
t.Errorf("no td recorded after %v", delay)
return
case err := <-eth.quit:
t.Errorf("no error expected, got %v", err)
return
}
go p2p.Send(eth, NewBlockMsg, &newBlockMsgData{block, common.Big2})
timer = time.After(delay)
select {
case td := <-tds:
if td.Cmp(common.Big2) != 0 {
t.Errorf("incorrect td %v, expected %v", td, common.Big2)
}
case <-timer:
t.Errorf("no td recorded after %v", delay)
return
case err := <-eth.quit:
t.Errorf("no error expected, got %v", err)
return
}
go p2p.Send(eth, NewBlockMsg, []interface{}{})
// Block.DecodeRLP: validation failed: header is nil
eth.checkError(ErrDecode, delay)
}
func TestBlockMsg(t *testing.T) {
// logInit()
eth := newEth(t)
blocks := make(chan *types.Block)
eth.blockPool.addBlock = func(block *types.Block, peerId string) (err error) {
blocks <- block
return
}
var disconnected bool
eth.blockPool.removePeer = func(peerId string) {
disconnected = true
}
go eth.run()
eth.handshake(t, true)
err := p2p.ExpectMsg(eth, TxMsg, []interface{}{})
if err != nil {
t.Errorf("transactions expected, got %v", err)
}
var delay = 3 * time.Second
// eth.reset()
newblock := func(i int64) *types.Block {
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return types.NewBlock(common.Hash{byte(i)}, common.Address{byte(i)}, common.Hash{byte(i)}, big.NewInt(i), uint64(i), []byte{byte(i)})
}
b := newblock(0)
b.Header().Difficulty = nil // check if nil as *big.Int decodes as 0
go p2p.Send(eth, BlocksMsg, types.Blocks{b, newblock(1), newblock(2)})
timer := time.After(delay)
for i := int64(0); i < 3; i++ {
select {
case block := <-blocks:
if (block.ParentHash() != common.Hash{byte(i)}) {
t.Errorf("incorrect block %v, expected %v", block.ParentHash(), common.Hash{byte(i)})
}
if block.Difficulty().Cmp(big.NewInt(i)) != 0 {
t.Errorf("incorrect block %v, expected %v", block.Difficulty(), big.NewInt(i))
}
case <-timer:
t.Errorf("no td recorded after %v", delay)
return
case err := <-eth.quit:
t.Errorf("no error expected, got %v", err)
return
}
}
go p2p.Send(eth, BlocksMsg, []interface{}{[]interface{}{}})
eth.checkError(ErrDecode, delay)
if !disconnected {
t.Errorf("peer not disconnected after error")
}
// test empty transaction
eth.reset()
go eth.run()
eth.handshake(t, true)
err = p2p.ExpectMsg(eth, TxMsg, []interface{}{})
if err != nil {
t.Errorf("transactions expected, got %v", err)
}
b = newblock(0)
b.AddTransaction(nil)
go p2p.Send(eth, BlocksMsg, types.Blocks{b})
eth.checkError(ErrDecode, delay)
}
func TestTransactionsMsg(t *testing.T) {
logInit()
eth := newEth(t)
txs := make(chan *types.Transaction)
eth.txPool.addTransactions = func(t []*types.Transaction) {
for _, tx := range t {
txs <- tx
}
}
go eth.run()
eth.handshake(t, true)
err := p2p.ExpectMsg(eth, TxMsg, []interface{}{})
if err != nil {
t.Errorf("transactions expected, got %v", err)
}
var delay = 3 * time.Second
tx := &types.Transaction{}
go p2p.Send(eth, TxMsg, []interface{}{tx, tx})
timer := time.After(delay)
for i := int64(0); i < 2; i++ {
select {
case <-txs:
case <-timer:
return
case err := <-eth.quit:
t.Errorf("no error expected, got %v", err)
return
}
}
go p2p.Send(eth, TxMsg, []interface{}{[]interface{}{}})
eth.checkError(ErrDecode, delay)
}