package network import ( "errors" "math/rand" "testing" "time" "github.com/nspcc-dev/neo-go/internal/random" "github.com/nspcc-dev/neo-go/internal/testserdes" "github.com/nspcc-dev/neo-go/pkg/config/netmode" "github.com/nspcc-dev/neo-go/pkg/core/block" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/network/capability" "github.com/nspcc-dev/neo-go/pkg/network/payload" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/stretchr/testify/require" ) func TestEncodeDecodeVersion(t *testing.T) { // message with tiny payload, shouldn't be compressed expected := NewMessage(CMDVersion, &payload.Version{ Magic: 1, Version: 2, Timestamp: uint32(time.Now().UnixNano()), Nonce: 987, UserAgent: []byte{1, 2, 3}, Capabilities: capability.Capabilities{ { Type: capability.FullNode, Data: &capability.Node{ StartHeight: 123, }, }, }, }) testserdes.EncodeDecode(t, expected, &Message{}) uncompressed, err := testserdes.EncodeBinary(expected.Payload) require.NoError(t, err) require.Equal(t, len(expected.compressedPayload), len(uncompressed)) // large payload should be compressed largeArray := make([]byte, CompressionMinSize) for i := range largeArray { largeArray[i] = byte(i) } expected.Payload.(*payload.Version).UserAgent = largeArray testserdes.EncodeDecode(t, expected, &Message{}) uncompressed, err = testserdes.EncodeBinary(expected.Payload) require.NoError(t, err) require.NotEqual(t, len(expected.compressedPayload), len(uncompressed)) } func TestEncodeDecodeHeaders(t *testing.T) { // shouldn't try to compress headers payload headers := &payload.Headers{Hdrs: make([]*block.Header, CompressionMinSize)} for i := range headers.Hdrs { h := &block.Header{ Base: block.Base{ Index: uint32(i + 1), Script: transaction.Witness{ InvocationScript: []byte{0x0}, VerificationScript: []byte{0x1}, }, }, } h.Hash() headers.Hdrs[i] = h } expected := NewMessage(CMDHeaders, headers) testserdes.EncodeDecode(t, expected, &Message{}) uncompressed, err := testserdes.EncodeBinary(expected.Payload) require.NoError(t, err) require.Equal(t, len(expected.compressedPayload), len(uncompressed)) } func TestEncodeDecodeGetAddr(t *testing.T) { // NullPayload should be handled properly testEncodeDecode(t, CMDGetAddr, payload.NewNullPayload()) } func TestEncodeDecodeNil(t *testing.T) { // nil payload should be decoded into NullPayload expected := NewMessage(CMDGetAddr, nil) encoded, err := testserdes.Encode(expected) require.NoError(t, err) decoded := &Message{} err = testserdes.Decode(encoded, decoded) require.NoError(t, err) require.Equal(t, NewMessage(CMDGetAddr, payload.NewNullPayload()), decoded) } func TestEncodeDecodePing(t *testing.T) { testEncodeDecode(t, CMDPing, payload.NewPing(123, 456)) } func TestEncodeDecodeInventory(t *testing.T) { testEncodeDecode(t, CMDInv, payload.NewInventory(payload.ExtensibleType, []util.Uint256{{1, 2, 3}})) } func TestEncodeDecodeAddr(t *testing.T) { const count = 3 p := payload.NewAddressList(count) p.Addrs[0] = &payload.AddressAndTime{ Timestamp: rand.Uint32(), Capabilities: capability.Capabilities{{ Type: capability.FullNode, Data: &capability.Node{StartHeight: rand.Uint32()}, }}, } p.Addrs[1] = &payload.AddressAndTime{ Timestamp: rand.Uint32(), Capabilities: capability.Capabilities{{ Type: capability.TCPServer, Data: &capability.Server{Port: uint16(rand.Uint32())}, }}, } p.Addrs[2] = &payload.AddressAndTime{ Timestamp: rand.Uint32(), Capabilities: capability.Capabilities{{ Type: capability.WSServer, Data: &capability.Server{Port: uint16(rand.Uint32())}, }}, } testEncodeDecode(t, CMDAddr, p) } func TestEncodeDecodeBlock(t *testing.T) { t.Run("good", func(t *testing.T) { testEncodeDecode(t, CMDBlock, newDummyBlock(12, 1)) }) t.Run("invalid state root enabled setting", func(t *testing.T) { expected := NewMessage(CMDBlock, newDummyBlock(31, 1)) expected.Network = netmode.UnitTestNet data, err := testserdes.Encode(expected) require.NoError(t, err) require.Error(t, testserdes.Decode(data, &Message{Network: netmode.UnitTestNet, StateRootInHeader: true})) }) } func TestEncodeDecodeGetBlock(t *testing.T) { t.Run("good, Count>0", func(t *testing.T) { testEncodeDecode(t, CMDGetBlocks, &payload.GetBlocks{ HashStart: random.Uint256(), Count: int16(rand.Uint32() >> 17), }) }) t.Run("good, Count=-1", func(t *testing.T) { testEncodeDecode(t, CMDGetBlocks, &payload.GetBlocks{ HashStart: random.Uint256(), Count: -1, }) }) t.Run("bad, Count=-2", func(t *testing.T) { testEncodeDecodeFail(t, CMDGetBlocks, &payload.GetBlocks{ HashStart: random.Uint256(), Count: -2, }) }) } func TestEnodeDecodeGetHeaders(t *testing.T) { testEncodeDecode(t, CMDGetHeaders, &payload.GetBlockByIndex{ IndexStart: rand.Uint32(), Count: payload.MaxHeadersAllowed, }) } func TestEncodeDecodeGetBlockByIndex(t *testing.T) { t.Run("good, Count>0", func(t *testing.T) { testEncodeDecode(t, CMDGetBlockByIndex, &payload.GetBlockByIndex{ IndexStart: rand.Uint32(), Count: payload.MaxHeadersAllowed, }) }) t.Run("bad, Count too big", func(t *testing.T) { testEncodeDecodeFail(t, CMDGetBlockByIndex, &payload.GetBlockByIndex{ IndexStart: rand.Uint32(), Count: payload.MaxHeadersAllowed + 1, }) }) t.Run("good, Count=-1", func(t *testing.T) { testEncodeDecode(t, CMDGetBlockByIndex, &payload.GetBlockByIndex{ IndexStart: rand.Uint32(), Count: -1, }) }) t.Run("bad, Count=-2", func(t *testing.T) { testEncodeDecodeFail(t, CMDGetBlockByIndex, &payload.GetBlockByIndex{ IndexStart: rand.Uint32(), Count: -2, }) }) } func TestEncodeDecodeTransaction(t *testing.T) { testEncodeDecode(t, CMDTX, newDummyTx()) } func TestEncodeDecodeMerkleBlock(t *testing.T) { base := &block.Base{ PrevHash: random.Uint256(), Timestamp: rand.Uint64(), Script: transaction.Witness{ InvocationScript: random.Bytes(10), VerificationScript: random.Bytes(11), }, Network: netmode.UnitTestNet, } base.Hash() t.Run("good", func(t *testing.T) { testEncodeDecode(t, CMDMerkleBlock, &payload.MerkleBlock{ Network: netmode.UnitTestNet, Base: base, TxCount: 1, Hashes: []util.Uint256{random.Uint256()}, Flags: []byte{0}, }) }) t.Run("bad, invalid TxCount", func(t *testing.T) { testEncodeDecodeFail(t, CMDMerkleBlock, &payload.MerkleBlock{ Base: base, TxCount: 2, Hashes: []util.Uint256{random.Uint256()}, Flags: []byte{0}, }) }) } func TestEncodeDecodeNotFound(t *testing.T) { testEncodeDecode(t, CMDNotFound, &payload.Inventory{ Type: payload.TXType, Hashes: []util.Uint256{random.Uint256()}, }) } func TestInvalidMessages(t *testing.T) { t.Run("CMDBlock, empty payload", func(t *testing.T) { testEncodeDecodeFail(t, CMDBlock, payload.NullPayload{}) }) t.Run("send decompressed with flag", func(t *testing.T) { m := NewMessage(CMDTX, newDummyTx()) data, err := testserdes.Encode(m) require.NoError(t, err) require.True(t, m.Flags&Compressed == 0) data[0] |= byte(Compressed) require.Error(t, testserdes.Decode(data, &Message{Network: netmode.UnitTestNet})) }) t.Run("invalid command", func(t *testing.T) { testEncodeDecodeFail(t, CommandType(0xFF), &payload.Version{Magic: netmode.UnitTestNet}) }) t.Run("very big payload size", func(t *testing.T) { m := NewMessage(CMDBlock, nil) w := io.NewBufBinWriter() w.WriteB(byte(m.Flags)) w.WriteB(byte(m.Command)) w.WriteVarBytes(make([]byte, payload.MaxSize+1)) require.NoError(t, w.Err) require.Error(t, testserdes.Decode(w.Bytes(), &Message{Network: netmode.UnitTestNet})) }) t.Run("fail to encode message if payload can't be serialized", func(t *testing.T) { m := NewMessage(CMDBlock, failSer(true)) _, err := m.Bytes() require.Error(t, err) // good otherwise m = NewMessage(CMDBlock, failSer(false)) _, err = m.Bytes() require.NoError(t, err) }) t.Run("trimmed payload", func(t *testing.T) { m := NewMessage(CMDBlock, newDummyBlock(1, 0)) data, err := testserdes.Encode(m) require.NoError(t, err) data = data[:len(data)-1] require.Error(t, testserdes.Decode(data, &Message{Network: netmode.UnitTestNet})) }) } type failSer bool func (f failSer) EncodeBinary(r *io.BinWriter) { if f { r.Err = errors.New("unserializable payload") } } func (failSer) DecodeBinary(w *io.BinReader) {} func newDummyBlock(height uint32, txCount int) *block.Block { b := block.New(netmode.UnitTestNet, false) b.Index = height b.PrevHash = random.Uint256() b.Timestamp = rand.Uint64() b.Script.InvocationScript = random.Bytes(2) b.Script.VerificationScript = random.Bytes(3) b.Transactions = make([]*transaction.Transaction, txCount) for i := range b.Transactions { b.Transactions[i] = newDummyTx() } b.Hash() return b } func newDummyTx() *transaction.Transaction { tx := transaction.New(netmode.UnitTestNet, random.Bytes(100), 123) tx.Signers = []transaction.Signer{{Account: random.Uint160()}} tx.Scripts = []transaction.Witness{{InvocationScript: []byte{}, VerificationScript: []byte{}}} tx.Size() tx.Hash() return tx } func testEncodeDecode(t *testing.T, cmd CommandType, p payload.Payload) *Message { expected := NewMessage(cmd, p) expected.Network = netmode.UnitTestNet actual := &Message{Network: netmode.UnitTestNet} testserdes.EncodeDecode(t, expected, actual) return actual } func testEncodeDecodeFail(t *testing.T, cmd CommandType, p payload.Payload) *Message { expected := NewMessage(cmd, p) expected.Network = netmode.UnitTestNet data, err := testserdes.Encode(expected) require.NoError(t, err) actual := &Message{Network: netmode.UnitTestNet} require.Error(t, testserdes.Decode(data, actual)) return actual }