go-ethereum/cmd/devp2p/internal/ethtest/suite.go

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// Copyright 2020 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 ethtest
import (
"fmt"
"net"
"strings"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/protocols/eth"
"github.com/ethereum/go-ethereum/internal/utesting"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/rlpx"
"github.com/stretchr/testify/assert"
)
var pretty = spew.ConfigState{
Indent: " ",
DisableCapacities: true,
DisablePointerAddresses: true,
SortKeys: true,
}
var timeout = 20 * time.Second
// Suite represents a structure used to test the eth
// protocol of a node(s).
type Suite struct {
Dest *enode.Node
chain *Chain
fullChain *Chain
}
// NewSuite creates and returns a new eth-test suite that can
// be used to test the given node against the given blockchain
// data.
func NewSuite(dest *enode.Node, chainfile string, genesisfile string) (*Suite, error) {
chain, err := loadChain(chainfile, genesisfile)
if err != nil {
return nil, err
}
return &Suite{
Dest: dest,
chain: chain.Shorten(1000),
fullChain: chain,
}, nil
}
func (s *Suite) AllEthTests() []utesting.Test {
return []utesting.Test{
// status
{Name: "TestStatus", Fn: s.TestStatus},
{Name: "TestStatus_66", Fn: s.TestStatus_66},
// get block headers
{Name: "TestGetBlockHeaders", Fn: s.TestGetBlockHeaders},
{Name: "TestGetBlockHeaders_66", Fn: s.TestGetBlockHeaders_66},
{Name: "TestSimultaneousRequests_66", Fn: s.TestSimultaneousRequests_66},
{Name: "TestSameRequestID_66", Fn: s.TestSameRequestID_66},
{Name: "TestZeroRequestID_66", Fn: s.TestZeroRequestID_66},
// get block bodies
{Name: "TestGetBlockBodies", Fn: s.TestGetBlockBodies},
{Name: "TestGetBlockBodies_66", Fn: s.TestGetBlockBodies_66},
// broadcast
{Name: "TestBroadcast", Fn: s.TestBroadcast},
{Name: "TestBroadcast_66", Fn: s.TestBroadcast_66},
{Name: "TestLargeAnnounce", Fn: s.TestLargeAnnounce},
{Name: "TestLargeAnnounce_66", Fn: s.TestLargeAnnounce_66},
{Name: "TestOldAnnounce", Fn: s.TestOldAnnounce},
{Name: "TestOldAnnounce_66", Fn: s.TestOldAnnounce_66},
// malicious handshakes + status
{Name: "TestMaliciousHandshake", Fn: s.TestMaliciousHandshake},
{Name: "TestMaliciousStatus", Fn: s.TestMaliciousStatus},
{Name: "TestMaliciousHandshake_66", Fn: s.TestMaliciousHandshake_66},
{Name: "TestMaliciousStatus_66", Fn: s.TestMaliciousStatus_66},
// test transactions
{Name: "TestTransaction", Fn: s.TestTransaction},
{Name: "TestTransaction_66", Fn: s.TestTransaction_66},
{Name: "TestMaliciousTx", Fn: s.TestMaliciousTx},
{Name: "TestMaliciousTx_66", Fn: s.TestMaliciousTx_66},
}
}
func (s *Suite) EthTests() []utesting.Test {
return []utesting.Test{
{Name: "TestStatus", Fn: s.TestStatus},
{Name: "TestGetBlockHeaders", Fn: s.TestGetBlockHeaders},
{Name: "TestGetBlockBodies", Fn: s.TestGetBlockBodies},
{Name: "TestBroadcast", Fn: s.TestBroadcast},
{Name: "TestLargeAnnounce", Fn: s.TestLargeAnnounce},
{Name: "TestMaliciousHandshake", Fn: s.TestMaliciousHandshake},
{Name: "TestMaliciousStatus", Fn: s.TestMaliciousStatus},
{Name: "TestTransaction", Fn: s.TestTransaction},
{Name: "TestMaliciousTx", Fn: s.TestMaliciousTx},
}
}
func (s *Suite) Eth66Tests() []utesting.Test {
return []utesting.Test{
// only proceed with eth66 test suite if node supports eth 66 protocol
{Name: "TestStatus_66", Fn: s.TestStatus_66},
{Name: "TestGetBlockHeaders_66", Fn: s.TestGetBlockHeaders_66},
{Name: "TestSimultaneousRequests_66", Fn: s.TestSimultaneousRequests_66},
{Name: "TestSameRequestID_66", Fn: s.TestSameRequestID_66},
{Name: "TestZeroRequestID_66", Fn: s.TestZeroRequestID_66},
{Name: "TestGetBlockBodies_66", Fn: s.TestGetBlockBodies_66},
{Name: "TestBroadcast_66", Fn: s.TestBroadcast_66},
{Name: "TestLargeAnnounce_66", Fn: s.TestLargeAnnounce_66},
{Name: "TestMaliciousHandshake_66", Fn: s.TestMaliciousHandshake_66},
{Name: "TestMaliciousStatus_66", Fn: s.TestMaliciousStatus_66},
{Name: "TestTransaction_66", Fn: s.TestTransaction_66},
{Name: "TestMaliciousTx_66", Fn: s.TestMaliciousTx_66},
}
}
// TestStatus attempts to connect to the given node and exchange
// a status message with it, and then check to make sure
// the chain head is correct.
func (s *Suite) TestStatus(t *utesting.T) {
conn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
// get protoHandshake
conn.handshake(t)
// get status
switch msg := conn.statusExchange(t, s.chain, nil).(type) {
case *Status:
t.Logf("got status message: %s", pretty.Sdump(msg))
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
// TestMaliciousStatus sends a status package with a large total difficulty.
func (s *Suite) TestMaliciousStatus(t *utesting.T) {
conn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
// get protoHandshake
conn.handshake(t)
status := &Status{
ProtocolVersion: uint32(conn.negotiatedProtoVersion),
NetworkID: s.chain.chainConfig.ChainID.Uint64(),
TD: largeNumber(2),
Head: s.chain.blocks[s.chain.Len()-1].Hash(),
Genesis: s.chain.blocks[0].Hash(),
ForkID: s.chain.ForkID(),
}
// get status
switch msg := conn.statusExchange(t, s.chain, status).(type) {
case *Status:
t.Logf("%+v\n", msg)
default:
t.Fatalf("expected status, got: %#v ", msg)
}
// wait for disconnect
switch msg := conn.ReadAndServe(s.chain, timeout).(type) {
case *Disconnect:
case *Error:
return
default:
t.Fatalf("expected disconnect, got: %s", pretty.Sdump(msg))
}
}
// TestGetBlockHeaders tests whether the given node can respond to
// a `GetBlockHeaders` request and that the response is accurate.
func (s *Suite) TestGetBlockHeaders(t *utesting.T) {
conn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
conn.handshake(t)
conn.statusExchange(t, s.chain, nil)
// get block headers
req := &GetBlockHeaders{
Origin: eth.HashOrNumber{
Hash: s.chain.blocks[1].Hash(),
},
Amount: 2,
Skip: 1,
Reverse: false,
}
if err := conn.Write(req); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
switch msg := conn.ReadAndServe(s.chain, timeout).(type) {
case *BlockHeaders:
headers := *msg
for _, header := range headers {
num := header.Number.Uint64()
t.Logf("received header (%d): %s", num, pretty.Sdump(header.Hash()))
assert.Equal(t, s.chain.blocks[int(num)].Header(), header)
}
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
// TestGetBlockBodies tests whether the given node can respond to
// a `GetBlockBodies` request and that the response is accurate.
func (s *Suite) TestGetBlockBodies(t *utesting.T) {
conn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
conn.handshake(t)
conn.statusExchange(t, s.chain, nil)
// create block bodies request
req := &GetBlockBodies{
s.chain.blocks[54].Hash(),
s.chain.blocks[75].Hash(),
}
if err := conn.Write(req); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
switch msg := conn.ReadAndServe(s.chain, timeout).(type) {
case *BlockBodies:
t.Logf("received %d block bodies", len(*msg))
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
// TestBroadcast tests whether a block announcement is correctly
// propagated to the given node's peer(s).
func (s *Suite) TestBroadcast(t *utesting.T) {
sendConn, receiveConn := s.setupConnection(t), s.setupConnection(t)
defer sendConn.Close()
defer receiveConn.Close()
nextBlock := len(s.chain.blocks)
blockAnnouncement := &NewBlock{
Block: s.fullChain.blocks[nextBlock],
TD: s.fullChain.TD(nextBlock + 1),
}
s.testAnnounce(t, sendConn, receiveConn, blockAnnouncement)
// update test suite chain
s.chain.blocks = append(s.chain.blocks, s.fullChain.blocks[nextBlock])
// wait for client to update its chain
if err := receiveConn.waitForBlock(s.chain.Head()); err != nil {
t.Fatal(err)
}
}
// TestMaliciousHandshake tries to send malicious data during the handshake.
func (s *Suite) TestMaliciousHandshake(t *utesting.T) {
conn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
// write hello to client
pub0 := crypto.FromECDSAPub(&conn.ourKey.PublicKey)[1:]
handshakes := []*Hello{
{
Version: 5,
Caps: []p2p.Cap{
{Name: largeString(2), Version: 64},
},
ID: pub0,
},
{
Version: 5,
Caps: []p2p.Cap{
{Name: "eth", Version: 64},
{Name: "eth", Version: 65},
},
ID: append(pub0, byte(0)),
},
{
Version: 5,
Caps: []p2p.Cap{
{Name: "eth", Version: 64},
{Name: "eth", Version: 65},
},
ID: append(pub0, pub0...),
},
{
Version: 5,
Caps: []p2p.Cap{
{Name: "eth", Version: 64},
{Name: "eth", Version: 65},
},
ID: largeBuffer(2),
},
{
Version: 5,
Caps: []p2p.Cap{
{Name: largeString(2), Version: 64},
},
ID: largeBuffer(2),
},
}
for i, handshake := range handshakes {
t.Logf("Testing malicious handshake %v\n", i)
// Init the handshake
if err := conn.Write(handshake); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
// check that the peer disconnected
timeout := 20 * time.Second
// Discard one hello
for i := 0; i < 2; i++ {
switch msg := conn.ReadAndServe(s.chain, timeout).(type) {
case *Disconnect:
case *Error:
case *Hello:
// Hello's are send concurrently, so ignore them
continue
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
// Dial for the next round
conn, err = s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
}
}
// TestLargeAnnounce tests the announcement mechanism with a large block.
func (s *Suite) TestLargeAnnounce(t *utesting.T) {
nextBlock := len(s.chain.blocks)
blocks := []*NewBlock{
{
Block: largeBlock(),
TD: s.fullChain.TD(nextBlock + 1),
},
{
Block: s.fullChain.blocks[nextBlock],
TD: largeNumber(2),
},
{
Block: largeBlock(),
TD: largeNumber(2),
},
{
Block: s.fullChain.blocks[nextBlock],
TD: s.fullChain.TD(nextBlock + 1),
},
}
for i, blockAnnouncement := range blocks[0:3] {
t.Logf("Testing malicious announcement: %v\n", i)
sendConn := s.setupConnection(t)
if err := sendConn.Write(blockAnnouncement); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
// Invalid announcement, check that peer disconnected
switch msg := sendConn.ReadAndServe(s.chain, time.Second*8).(type) {
case *Disconnect:
case *Error:
break
default:
t.Fatalf("unexpected: %s wanted disconnect", pretty.Sdump(msg))
}
sendConn.Close()
}
// Test the last block as a valid block
sendConn := s.setupConnection(t)
receiveConn := s.setupConnection(t)
defer sendConn.Close()
defer receiveConn.Close()
s.testAnnounce(t, sendConn, receiveConn, blocks[3])
// update test suite chain
s.chain.blocks = append(s.chain.blocks, s.fullChain.blocks[nextBlock])
// wait for client to update its chain
if err := receiveConn.waitForBlock(s.fullChain.blocks[nextBlock]); err != nil {
t.Fatal(err)
}
}
func (s *Suite) TestOldAnnounce(t *utesting.T) {
sendConn, recvConn := s.setupConnection(t), s.setupConnection(t)
defer sendConn.Close()
defer recvConn.Close()
s.oldAnnounce(t, sendConn, recvConn)
}
func (s *Suite) oldAnnounce(t *utesting.T, sendConn, receiveConn *Conn) {
oldBlockAnnounce := &NewBlock{
Block: s.chain.blocks[len(s.chain.blocks)/2],
TD: s.chain.blocks[len(s.chain.blocks)/2].Difficulty(),
}
if err := sendConn.Write(oldBlockAnnounce); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
switch msg := receiveConn.ReadAndServe(s.chain, time.Second*8).(type) {
case *NewBlock:
block := *msg
if block.Block.Hash() == oldBlockAnnounce.Block.Hash() {
t.Fatalf("unexpected: block propagated: %s", pretty.Sdump(msg))
}
case *NewBlockHashes:
hashes := *msg
for _, hash := range hashes {
if hash.Hash == oldBlockAnnounce.Block.Hash() {
t.Fatalf("unexpected: block announced: %s", pretty.Sdump(msg))
}
}
case *Error:
errMsg := *msg
// check to make sure error is timeout (propagation didn't come through == test successful)
if !strings.Contains(errMsg.String(), "timeout") {
t.Fatalf("unexpected error: %v", pretty.Sdump(msg))
}
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
func (s *Suite) testAnnounce(t *utesting.T, sendConn, receiveConn *Conn, blockAnnouncement *NewBlock) {
// Announce the block.
if err := sendConn.Write(blockAnnouncement); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
s.waitAnnounce(t, receiveConn, blockAnnouncement)
}
func (s *Suite) waitAnnounce(t *utesting.T, conn *Conn, blockAnnouncement *NewBlock) {
timeout := 20 * time.Second
switch msg := conn.ReadAndServe(s.chain, timeout).(type) {
case *NewBlock:
t.Logf("received NewBlock message: %s", pretty.Sdump(msg.Block))
assert.Equal(t,
blockAnnouncement.Block.Header(), msg.Block.Header(),
"wrong block header in announcement",
)
assert.Equal(t,
blockAnnouncement.TD, msg.TD,
"wrong TD in announcement",
)
case *NewBlockHashes:
message := *msg
t.Logf("received NewBlockHashes message: %s", pretty.Sdump(message))
assert.Equal(t, blockAnnouncement.Block.Hash(), message[0].Hash,
"wrong block hash in announcement",
)
default:
t.Fatalf("unexpected: %s", pretty.Sdump(msg))
}
}
func (s *Suite) setupConnection(t *utesting.T) *Conn {
// create conn
sendConn, err := s.dial()
if err != nil {
t.Fatalf("could not dial: %v", err)
}
sendConn.handshake(t)
sendConn.statusExchange(t, s.chain, nil)
return sendConn
}
// dial attempts to dial the given node and perform a handshake,
// returning the created Conn if successful.
func (s *Suite) dial() (*Conn, error) {
var conn Conn
// dial
fd, err := net.Dial("tcp", fmt.Sprintf("%v:%d", s.Dest.IP(), s.Dest.TCP()))
if err != nil {
return nil, err
}
conn.Conn = rlpx.NewConn(fd, s.Dest.Pubkey())
// do encHandshake
conn.ourKey, _ = crypto.GenerateKey()
_, err = conn.Handshake(conn.ourKey)
if err != nil {
return nil, err
}
// set default p2p capabilities
conn.caps = []p2p.Cap{
{Name: "eth", Version: 64},
{Name: "eth", Version: 65},
}
conn.ourHighestProtoVersion = 65
return &conn, nil
}
func (s *Suite) TestTransaction(t *utesting.T) {
tests := []*types.Transaction{
getNextTxFromChain(t, s),
unknownTx(t, s),
}
for i, tx := range tests {
t.Logf("Testing tx propagation: %v\n", i)
sendSuccessfulTx(t, s, tx)
}
}
func (s *Suite) TestMaliciousTx(t *utesting.T) {
badTxs := []*types.Transaction{
getOldTxFromChain(t, s),
invalidNonceTx(t, s),
hugeAmount(t, s),
hugeGasPrice(t, s),
hugeData(t, s),
}
sendConn := s.setupConnection(t)
defer sendConn.Close()
// set up receiving connection before sending txs to make sure
// no announcements are missed
recvConn := s.setupConnection(t)
defer recvConn.Close()
for i, tx := range badTxs {
t.Logf("Testing malicious tx propagation: %v\n", i)
if err := sendConn.Write(&Transactions{tx}); err != nil {
t.Fatalf("could not write to connection: %v", err)
}
}
// check to make sure bad txs aren't propagated
waitForTxPropagation(t, s, badTxs, recvConn)
}