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698 lines
26 KiB
698 lines
26 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package eth
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import (
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"fmt"
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"math"
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"math/big"
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"math/rand"
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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/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/params"
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)
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// Tests that block headers can be retrieved from a remote chain based on user queries.
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func TestGetBlockHeaders63(t *testing.T) { testGetBlockHeaders(t, 63) }
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func TestGetBlockHeaders64(t *testing.T) { testGetBlockHeaders(t, 64) }
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func testGetBlockHeaders(t *testing.T, protocol int) {
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pm, _ := newTestProtocolManagerMust(t, downloader.FullSync, downloader.MaxHashFetch+15, nil, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Create a "random" unknown hash for testing
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var unknown common.Hash
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for i := range unknown {
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unknown[i] = byte(i)
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}
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// Create a batch of tests for various scenarios
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limit := uint64(downloader.MaxHeaderFetch)
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tests := []struct {
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query *getBlockHeadersData // The query to execute for header retrieval
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expect []common.Hash // The hashes of the block whose headers are expected
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}{
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// A single random block should be retrievable by hash and number too
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
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},
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// Multiple headers should be retrievable in both directions
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 1).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 2).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 1).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 2).Hash(),
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},
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},
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// Multiple headers with skip lists should be retrievable
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 4).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 8).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 4).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 8).Hash(),
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},
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},
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// The chain endpoints should be retrievable
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(0).Hash()},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64()}, Amount: 1},
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[]common.Hash{pm.blockchain.CurrentBlock().Hash()},
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},
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// Ensure protocol limits are honored
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
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pm.blockchain.GetBlockHashesFromHash(pm.blockchain.CurrentBlock().Hash(), limit),
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},
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// Check that requesting more than available is handled gracefully
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64()).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(4).Hash(),
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pm.blockchain.GetBlockByNumber(0).Hash(),
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},
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},
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// Check that requesting more than available is handled gracefully, even if mid skip
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 1).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(4).Hash(),
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pm.blockchain.GetBlockByNumber(1).Hash(),
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},
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},
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// Check a corner case where requesting more can iterate past the endpoints
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: 2}, Amount: 5, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(2).Hash(),
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pm.blockchain.GetBlockByNumber(1).Hash(),
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pm.blockchain.GetBlockByNumber(0).Hash(),
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},
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},
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// Check a corner case where skipping overflow loops back into the chain start
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(3).Hash()}, Amount: 2, Reverse: false, Skip: math.MaxUint64 - 1},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(3).Hash(),
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},
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},
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// Check a corner case where skipping overflow loops back to the same header
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(1).Hash()}, Amount: 2, Reverse: false, Skip: math.MaxUint64},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(1).Hash(),
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},
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},
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// Check that non existing headers aren't returned
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
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[]common.Hash{},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() + 1}, Amount: 1},
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[]common.Hash{},
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},
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}
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// Run each of the tests and verify the results against the chain
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for i, tt := range tests {
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// Collect the headers to expect in the response
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headers := []*types.Header{}
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for _, hash := range tt.expect {
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headers = append(headers, pm.blockchain.GetBlockByHash(hash).Header())
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}
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// Send the hash request and verify the response
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p2p.Send(peer.app, 0x03, tt.query)
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if err := p2p.ExpectMsg(peer.app, 0x04, headers); err != nil {
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t.Errorf("test %d: headers mismatch: %v", i, err)
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}
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// If the test used number origins, repeat with hashes as the too
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if tt.query.Origin.Hash == (common.Hash{}) {
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if origin := pm.blockchain.GetBlockByNumber(tt.query.Origin.Number); origin != nil {
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tt.query.Origin.Hash, tt.query.Origin.Number = origin.Hash(), 0
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p2p.Send(peer.app, 0x03, tt.query)
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if err := p2p.ExpectMsg(peer.app, 0x04, headers); err != nil {
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t.Errorf("test %d: headers mismatch: %v", i, err)
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}
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}
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}
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}
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}
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// Tests that block contents can be retrieved from a remote chain based on their hashes.
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func TestGetBlockBodies63(t *testing.T) { testGetBlockBodies(t, 63) }
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func TestGetBlockBodies64(t *testing.T) { testGetBlockBodies(t, 64) }
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func testGetBlockBodies(t *testing.T, protocol int) {
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pm, _ := newTestProtocolManagerMust(t, downloader.FullSync, downloader.MaxBlockFetch+15, nil, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Create a batch of tests for various scenarios
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limit := downloader.MaxBlockFetch
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tests := []struct {
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random int // Number of blocks to fetch randomly from the chain
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explicit []common.Hash // Explicitly requested blocks
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available []bool // Availability of explicitly requested blocks
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expected int // Total number of existing blocks to expect
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}{
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{1, nil, nil, 1}, // A single random block should be retrievable
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{10, nil, nil, 10}, // Multiple random blocks should be retrievable
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{limit, nil, nil, limit}, // The maximum possible blocks should be retrievable
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{limit + 1, nil, nil, limit}, // No more than the possible block count should be returned
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{0, []common.Hash{pm.blockchain.Genesis().Hash()}, []bool{true}, 1}, // The genesis block should be retrievable
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{0, []common.Hash{pm.blockchain.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
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{0, []common.Hash{{}}, []bool{false}, 0}, // A non existent block should not be returned
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// Existing and non-existing blocks interleaved should not cause problems
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{0, []common.Hash{
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{},
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pm.blockchain.GetBlockByNumber(1).Hash(),
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{},
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pm.blockchain.GetBlockByNumber(10).Hash(),
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{},
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pm.blockchain.GetBlockByNumber(100).Hash(),
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{},
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}, []bool{false, true, false, true, false, true, false}, 3},
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}
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// Run each of the tests and verify the results against the chain
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for i, tt := range tests {
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// Collect the hashes to request, and the response to expect
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hashes, seen := []common.Hash{}, make(map[int64]bool)
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bodies := []*blockBody{}
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for j := 0; j < tt.random; j++ {
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for {
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num := rand.Int63n(int64(pm.blockchain.CurrentBlock().NumberU64()))
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if !seen[num] {
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seen[num] = true
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block := pm.blockchain.GetBlockByNumber(uint64(num))
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hashes = append(hashes, block.Hash())
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if len(bodies) < tt.expected {
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bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
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}
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break
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}
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}
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}
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for j, hash := range tt.explicit {
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hashes = append(hashes, hash)
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if tt.available[j] && len(bodies) < tt.expected {
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block := pm.blockchain.GetBlockByHash(hash)
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bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
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}
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}
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// Send the hash request and verify the response
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p2p.Send(peer.app, 0x05, hashes)
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if err := p2p.ExpectMsg(peer.app, 0x06, bodies); err != nil {
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t.Errorf("test %d: bodies mismatch: %v", i, err)
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}
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}
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}
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// Tests that the node state database can be retrieved based on hashes.
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func TestGetNodeData63(t *testing.T) { testGetNodeData(t, 63) }
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func TestGetNodeData64(t *testing.T) { testGetNodeData(t, 64) }
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func testGetNodeData(t *testing.T, protocol int) {
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// Define three accounts to simulate transactions with
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acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
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acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
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acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
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acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
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signer := types.HomesteadSigner{}
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// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_markets_test)
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generator := func(i int, block *core.BlockGen) {
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switch i {
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case 0:
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// In block 1, the test bank sends account #1 some ether.
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tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
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block.AddTx(tx)
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case 1:
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// In block 2, the test bank sends some more ether to account #1.
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// acc1Addr passes it on to account #2.
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tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
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tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
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block.AddTx(tx1)
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block.AddTx(tx2)
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case 2:
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// Block 3 is empty but was mined by account #2.
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block.SetCoinbase(acc2Addr)
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block.SetExtra([]byte("yeehaw"))
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case 3:
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// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
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b2 := block.PrevBlock(1).Header()
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b2.Extra = []byte("foo")
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block.AddUncle(b2)
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b3 := block.PrevBlock(2).Header()
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b3.Extra = []byte("foo")
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block.AddUncle(b3)
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}
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}
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// Assemble the test environment
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pm, db := newTestProtocolManagerMust(t, downloader.FullSync, 4, generator, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Fetch for now the entire chain db
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hashes := []common.Hash{}
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it := db.NewIterator()
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for it.Next() {
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if key := it.Key(); len(key) == common.HashLength {
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hashes = append(hashes, common.BytesToHash(key))
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}
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}
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it.Release()
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p2p.Send(peer.app, 0x0d, hashes)
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msg, err := peer.app.ReadMsg()
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if err != nil {
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t.Fatalf("failed to read node data response: %v", err)
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}
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if msg.Code != 0x0e {
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t.Fatalf("response packet code mismatch: have %x, want %x", msg.Code, 0x0c)
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}
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var data [][]byte
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if err := msg.Decode(&data); err != nil {
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t.Fatalf("failed to decode response node data: %v", err)
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}
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// Verify that all hashes correspond to the requested data, and reconstruct a state tree
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for i, want := range hashes {
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if hash := crypto.Keccak256Hash(data[i]); hash != want {
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t.Errorf("data hash mismatch: have %x, want %x", hash, want)
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}
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}
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statedb := rawdb.NewMemoryDatabase()
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for i := 0; i < len(data); i++ {
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statedb.Put(hashes[i].Bytes(), data[i])
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}
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accounts := []common.Address{testBank, acc1Addr, acc2Addr}
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for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
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trie, _ := state.New(pm.blockchain.GetBlockByNumber(i).Root(), state.NewDatabase(statedb))
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for j, acc := range accounts {
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state, _ := pm.blockchain.State()
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bw := state.GetBalance(acc)
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bh := trie.GetBalance(acc)
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if (bw != nil && bh == nil) || (bw == nil && bh != nil) {
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t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
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}
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if bw != nil && bh != nil && bw.Cmp(bw) != 0 {
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t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
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}
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}
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}
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}
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// Tests that the transaction receipts can be retrieved based on hashes.
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func TestGetReceipt63(t *testing.T) { testGetReceipt(t, 63) }
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func TestGetReceipt64(t *testing.T) { testGetReceipt(t, 64) }
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func testGetReceipt(t *testing.T, protocol int) {
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// Define three accounts to simulate transactions with
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acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
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acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
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acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
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acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
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signer := types.HomesteadSigner{}
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// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_markets_test)
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generator := func(i int, block *core.BlockGen) {
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switch i {
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case 0:
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// In block 1, the test bank sends account #1 some ether.
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tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
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block.AddTx(tx)
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case 1:
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// In block 2, the test bank sends some more ether to account #1.
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// acc1Addr passes it on to account #2.
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tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
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tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
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block.AddTx(tx1)
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block.AddTx(tx2)
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case 2:
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// Block 3 is empty but was mined by account #2.
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block.SetCoinbase(acc2Addr)
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block.SetExtra([]byte("yeehaw"))
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case 3:
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// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
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b2 := block.PrevBlock(1).Header()
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b2.Extra = []byte("foo")
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block.AddUncle(b2)
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b3 := block.PrevBlock(2).Header()
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b3.Extra = []byte("foo")
|
|
block.AddUncle(b3)
|
|
}
|
|
}
|
|
// Assemble the test environment
|
|
pm, _ := newTestProtocolManagerMust(t, downloader.FullSync, 4, generator, nil)
|
|
peer, _ := newTestPeer("peer", protocol, pm, true)
|
|
defer peer.close()
|
|
|
|
// Collect the hashes to request, and the response to expect
|
|
hashes, receipts := []common.Hash{}, []types.Receipts{}
|
|
for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
|
|
block := pm.blockchain.GetBlockByNumber(i)
|
|
|
|
hashes = append(hashes, block.Hash())
|
|
receipts = append(receipts, pm.blockchain.GetReceiptsByHash(block.Hash()))
|
|
}
|
|
// Send the hash request and verify the response
|
|
p2p.Send(peer.app, 0x0f, hashes)
|
|
if err := p2p.ExpectMsg(peer.app, 0x10, receipts); err != nil {
|
|
t.Errorf("receipts mismatch: %v", err)
|
|
}
|
|
}
|
|
|
|
// Tests that post eth protocol handshake, clients perform a mutual checkpoint
|
|
// challenge to validate each other's chains. Hash mismatches, or missing ones
|
|
// during a fast sync should lead to the peer getting dropped.
|
|
func TestCheckpointChallenge(t *testing.T) {
|
|
tests := []struct {
|
|
syncmode downloader.SyncMode
|
|
checkpoint bool
|
|
timeout bool
|
|
empty bool
|
|
match bool
|
|
drop bool
|
|
}{
|
|
// If checkpointing is not enabled locally, don't challenge and don't drop
|
|
{downloader.FullSync, false, false, false, false, false},
|
|
{downloader.FastSync, false, false, false, false, false},
|
|
|
|
// If checkpointing is enabled locally and remote response is empty, only drop during fast sync
|
|
{downloader.FullSync, true, false, true, false, false},
|
|
{downloader.FastSync, true, false, true, false, true}, // Special case, fast sync, unsynced peer
|
|
|
|
// If checkpointing is enabled locally and remote response mismatches, always drop
|
|
{downloader.FullSync, true, false, false, false, true},
|
|
{downloader.FastSync, true, false, false, false, true},
|
|
|
|
// If checkpointing is enabled locally and remote response matches, never drop
|
|
{downloader.FullSync, true, false, false, true, false},
|
|
{downloader.FastSync, true, false, false, true, false},
|
|
|
|
// If checkpointing is enabled locally and remote times out, always drop
|
|
{downloader.FullSync, true, true, false, true, true},
|
|
{downloader.FastSync, true, true, false, true, true},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(fmt.Sprintf("sync %v checkpoint %v timeout %v empty %v match %v", tt.syncmode, tt.checkpoint, tt.timeout, tt.empty, tt.match), func(t *testing.T) {
|
|
testCheckpointChallenge(t, tt.syncmode, tt.checkpoint, tt.timeout, tt.empty, tt.match, tt.drop)
|
|
})
|
|
}
|
|
}
|
|
|
|
func testCheckpointChallenge(t *testing.T, syncmode downloader.SyncMode, checkpoint bool, timeout bool, empty bool, match bool, drop bool) {
|
|
// Reduce the checkpoint handshake challenge timeout
|
|
defer func(old time.Duration) { syncChallengeTimeout = old }(syncChallengeTimeout)
|
|
syncChallengeTimeout = 250 * time.Millisecond
|
|
|
|
// Initialize a chain and generate a fake CHT if checkpointing is enabled
|
|
var (
|
|
db = rawdb.NewMemoryDatabase()
|
|
config = new(params.ChainConfig)
|
|
)
|
|
(&core.Genesis{Config: config}).MustCommit(db) // Commit genesis block
|
|
// If checkpointing is enabled, create and inject a fake CHT and the corresponding
|
|
// chllenge response.
|
|
var response *types.Header
|
|
var cht *params.TrustedCheckpoint
|
|
if checkpoint {
|
|
index := uint64(rand.Intn(500))
|
|
number := (index+1)*params.CHTFrequency - 1
|
|
response = &types.Header{Number: big.NewInt(int64(number)), Extra: []byte("valid")}
|
|
|
|
cht = ¶ms.TrustedCheckpoint{
|
|
SectionIndex: index,
|
|
SectionHead: response.Hash(),
|
|
}
|
|
}
|
|
// Create a checkpoint aware protocol manager
|
|
blockchain, err := core.NewBlockChain(db, nil, config, ethash.NewFaker(), vm.Config{}, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to create new blockchain: %v", err)
|
|
}
|
|
pm, err := NewProtocolManager(config, cht, syncmode, DefaultConfig.NetworkId, new(event.TypeMux), &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, ethash.NewFaker(), blockchain, db, 1, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to start test protocol manager: %v", err)
|
|
}
|
|
pm.Start(1000)
|
|
defer pm.Stop()
|
|
|
|
// Connect a new peer and check that we receive the checkpoint challenge
|
|
peer, _ := newTestPeer("peer", eth63, pm, true)
|
|
defer peer.close()
|
|
|
|
if checkpoint {
|
|
challenge := &getBlockHeadersData{
|
|
Origin: hashOrNumber{Number: response.Number.Uint64()},
|
|
Amount: 1,
|
|
Skip: 0,
|
|
Reverse: false,
|
|
}
|
|
if err := p2p.ExpectMsg(peer.app, GetBlockHeadersMsg, challenge); err != nil {
|
|
t.Fatalf("challenge mismatch: %v", err)
|
|
}
|
|
// Create a block to reply to the challenge if no timeout is simulated
|
|
if !timeout {
|
|
if empty {
|
|
if err := p2p.Send(peer.app, BlockHeadersMsg, []*types.Header{}); err != nil {
|
|
t.Fatalf("failed to answer challenge: %v", err)
|
|
}
|
|
} else if match {
|
|
if err := p2p.Send(peer.app, BlockHeadersMsg, []*types.Header{response}); err != nil {
|
|
t.Fatalf("failed to answer challenge: %v", err)
|
|
}
|
|
} else {
|
|
if err := p2p.Send(peer.app, BlockHeadersMsg, []*types.Header{{Number: response.Number}}); err != nil {
|
|
t.Fatalf("failed to answer challenge: %v", err)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Wait until the test timeout passes to ensure proper cleanup
|
|
time.Sleep(syncChallengeTimeout + 100*time.Millisecond)
|
|
|
|
// Verify that the remote peer is maintained or dropped
|
|
if drop {
|
|
if peers := pm.peers.Len(); peers != 0 {
|
|
t.Fatalf("peer count mismatch: have %d, want %d", peers, 0)
|
|
}
|
|
} else {
|
|
if peers := pm.peers.Len(); peers != 1 {
|
|
t.Fatalf("peer count mismatch: have %d, want %d", peers, 1)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBroadcastBlock(t *testing.T) {
|
|
var tests = []struct {
|
|
totalPeers int
|
|
broadcastExpected int
|
|
}{
|
|
{1, 1},
|
|
{2, 2},
|
|
{3, 3},
|
|
{4, 4},
|
|
{5, 4},
|
|
{9, 4},
|
|
{12, 4},
|
|
{16, 4},
|
|
{26, 5},
|
|
{100, 10},
|
|
}
|
|
for _, test := range tests {
|
|
testBroadcastBlock(t, test.totalPeers, test.broadcastExpected)
|
|
}
|
|
}
|
|
|
|
func testBroadcastBlock(t *testing.T, totalPeers, broadcastExpected int) {
|
|
var (
|
|
evmux = new(event.TypeMux)
|
|
pow = ethash.NewFaker()
|
|
db = rawdb.NewMemoryDatabase()
|
|
config = ¶ms.ChainConfig{}
|
|
gspec = &core.Genesis{Config: config}
|
|
genesis = gspec.MustCommit(db)
|
|
)
|
|
blockchain, err := core.NewBlockChain(db, nil, config, pow, vm.Config{}, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to create new blockchain: %v", err)
|
|
}
|
|
pm, err := NewProtocolManager(config, nil, downloader.FullSync, DefaultConfig.NetworkId, evmux, &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, pow, blockchain, db, 1, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to start test protocol manager: %v", err)
|
|
}
|
|
pm.Start(1000)
|
|
defer pm.Stop()
|
|
var peers []*testPeer
|
|
for i := 0; i < totalPeers; i++ {
|
|
peer, _ := newTestPeer(fmt.Sprintf("peer %d", i), eth63, pm, true)
|
|
defer peer.close()
|
|
peers = append(peers, peer)
|
|
}
|
|
chain, _ := core.GenerateChain(gspec.Config, genesis, ethash.NewFaker(), db, 1, func(i int, gen *core.BlockGen) {})
|
|
pm.BroadcastBlock(chain[0], true /*propagate*/)
|
|
|
|
errCh := make(chan error, totalPeers)
|
|
doneCh := make(chan struct{}, totalPeers)
|
|
for _, peer := range peers {
|
|
go func(p *testPeer) {
|
|
if err := p2p.ExpectMsg(p.app, NewBlockMsg, &newBlockData{Block: chain[0], TD: big.NewInt(131136)}); err != nil {
|
|
errCh <- err
|
|
} else {
|
|
doneCh <- struct{}{}
|
|
}
|
|
}(peer)
|
|
}
|
|
timeout := time.After(2 * time.Second)
|
|
var receivedCount int
|
|
outer:
|
|
for {
|
|
select {
|
|
case err = <-errCh:
|
|
break outer
|
|
case <-doneCh:
|
|
receivedCount++
|
|
if receivedCount == totalPeers {
|
|
break outer
|
|
}
|
|
case <-timeout:
|
|
break outer
|
|
}
|
|
}
|
|
for _, peer := range peers {
|
|
peer.app.Close()
|
|
}
|
|
if err != nil {
|
|
t.Errorf("error matching block by peer: %v", err)
|
|
}
|
|
if receivedCount != broadcastExpected {
|
|
t.Errorf("block broadcast to %d peers, expected %d", receivedCount, broadcastExpected)
|
|
}
|
|
}
|
|
|
|
// Tests that a propagated malformed block (uncles or transactions don't match
|
|
// with the hashes in the header) gets discarded and not broadcast forward.
|
|
func TestBroadcastMalformedBlock(t *testing.T) {
|
|
// Create a live node to test propagation with
|
|
var (
|
|
engine = ethash.NewFaker()
|
|
db = rawdb.NewMemoryDatabase()
|
|
config = ¶ms.ChainConfig{}
|
|
gspec = &core.Genesis{Config: config}
|
|
genesis = gspec.MustCommit(db)
|
|
)
|
|
blockchain, err := core.NewBlockChain(db, nil, config, engine, vm.Config{}, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to create new blockchain: %v", err)
|
|
}
|
|
pm, err := NewProtocolManager(config, nil, downloader.FullSync, DefaultConfig.NetworkId, new(event.TypeMux), new(testTxPool), engine, blockchain, db, 1, nil)
|
|
if err != nil {
|
|
t.Fatalf("failed to start test protocol manager: %v", err)
|
|
}
|
|
pm.Start(2)
|
|
defer pm.Stop()
|
|
|
|
// Create two peers, one to send the malformed block with and one to check
|
|
// propagation
|
|
source, _ := newTestPeer("source", eth63, pm, true)
|
|
defer source.close()
|
|
|
|
sink, _ := newTestPeer("sink", eth63, pm, true)
|
|
defer sink.close()
|
|
|
|
// Create various combinations of malformed blocks
|
|
chain, _ := core.GenerateChain(gspec.Config, genesis, ethash.NewFaker(), db, 1, func(i int, gen *core.BlockGen) {})
|
|
|
|
malformedUncles := chain[0].Header()
|
|
malformedUncles.UncleHash[0]++
|
|
malformedTransactions := chain[0].Header()
|
|
malformedTransactions.TxHash[0]++
|
|
malformedEverything := chain[0].Header()
|
|
malformedEverything.UncleHash[0]++
|
|
malformedEverything.TxHash[0]++
|
|
|
|
// Keep listening to broadcasts and notify if any arrives
|
|
notify := make(chan struct{})
|
|
go func() {
|
|
if _, err := sink.app.ReadMsg(); err == nil {
|
|
notify <- struct{}{}
|
|
}
|
|
}()
|
|
// Try to broadcast all malformations and ensure they all get discarded
|
|
for _, header := range []*types.Header{malformedUncles, malformedTransactions, malformedEverything} {
|
|
block := types.NewBlockWithHeader(header).WithBody(chain[0].Transactions(), chain[0].Uncles())
|
|
if err := p2p.Send(source.app, NewBlockMsg, []interface{}{block, big.NewInt(131136)}); err != nil {
|
|
t.Fatalf("failed to broadcast block: %v", err)
|
|
}
|
|
select {
|
|
case <-notify:
|
|
t.Fatalf("malformed block forwarded")
|
|
case <-time.After(100 * time.Millisecond):
|
|
}
|
|
}
|
|
}
|
|
|