mirror of
https://github.com/btcsuite/btcd.git
synced 2024-11-19 18:00:11 +01:00
48abfdf87c
This commit modifies the existing wire.Message interface to introduce a new MessageEncoding variant which dictates the exact encoding to be used when serializing and deserializing messages. Such an option is now necessary due to the segwit soft-fork package, as btcd will need to be able to optionally encode transactions/blocks without witness data to un-upgraded peers. Two new functions have been introduced: ReadMessageWithEncodingN and WriteMessageWithEncodingN which wrap BtcDecode/BtcEncode with the desired encoding format.
392 lines
12 KiB
Go
392 lines
12 KiB
Go
// Copyright (c) 2013-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package wire
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import (
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"bytes"
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"io"
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"reflect"
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"testing"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/davecgh/go-spew/spew"
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)
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// TestGetHeaders tests the MsgGetHeader API.
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func TestGetHeaders(t *testing.T) {
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pver := ProtocolVersion
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// Block 99500 hash.
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hashStr := "000000000002e7ad7b9eef9479e4aabc65cb831269cc20d2632c13684406dee0"
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locatorHash, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// Ensure the command is expected value.
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wantCmd := "getheaders"
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msg := NewMsgGetHeaders()
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if cmd := msg.Command(); cmd != wantCmd {
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t.Errorf("NewMsgGetHeaders: wrong command - got %v want %v",
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cmd, wantCmd)
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}
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// Ensure max payload is expected value for latest protocol version.
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// Protocol version 4 bytes + num hashes (varInt) + max block locator
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// hashes + hash stop.
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wantPayload := uint32(16045)
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maxPayload := msg.MaxPayloadLength(pver)
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if maxPayload != wantPayload {
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t.Errorf("MaxPayloadLength: wrong max payload length for "+
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"protocol version %d - got %v, want %v", pver,
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maxPayload, wantPayload)
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}
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// Ensure block locator hashes are added properly.
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err = msg.AddBlockLocatorHash(locatorHash)
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if err != nil {
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t.Errorf("AddBlockLocatorHash: %v", err)
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}
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if msg.BlockLocatorHashes[0] != locatorHash {
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t.Errorf("AddBlockLocatorHash: wrong block locator added - "+
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"got %v, want %v",
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spew.Sprint(msg.BlockLocatorHashes[0]),
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spew.Sprint(locatorHash))
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}
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// Ensure adding more than the max allowed block locator hashes per
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// message returns an error.
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for i := 0; i < MaxBlockLocatorsPerMsg; i++ {
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err = msg.AddBlockLocatorHash(locatorHash)
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}
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if err == nil {
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t.Errorf("AddBlockLocatorHash: expected error on too many " +
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"block locator hashes not received")
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}
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}
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// TestGetHeadersWire tests the MsgGetHeaders wire encode and decode for various
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// numbers of block locator hashes and protocol versions.
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func TestGetHeadersWire(t *testing.T) {
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// Set protocol inside getheaders message. Use protocol version 60002
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// specifically here instead of the latest because the test data is
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// using bytes encoded with that protocol version.
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pver := uint32(60002)
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// Block 99499 hash.
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hashStr := "2710f40c87ec93d010a6fd95f42c59a2cbacc60b18cf6b7957535"
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hashLocator, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// Block 99500 hash.
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hashStr = "2e7ad7b9eef9479e4aabc65cb831269cc20d2632c13684406dee0"
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hashLocator2, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// Block 100000 hash.
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hashStr = "3ba27aa200b1cecaad478d2b00432346c3f1f3986da1afd33e506"
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hashStop, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// MsgGetHeaders message with no block locators or stop hash.
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noLocators := NewMsgGetHeaders()
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noLocators.ProtocolVersion = pver
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noLocatorsEncoded := []byte{
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0x62, 0xea, 0x00, 0x00, // Protocol version 60002
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0x00, // Varint for number of block locator hashes
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Hash stop
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}
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// MsgGetHeaders message with multiple block locators and a stop hash.
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multiLocators := NewMsgGetHeaders()
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multiLocators.ProtocolVersion = pver
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multiLocators.HashStop = *hashStop
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multiLocators.AddBlockLocatorHash(hashLocator2)
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multiLocators.AddBlockLocatorHash(hashLocator)
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multiLocatorsEncoded := []byte{
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0x62, 0xea, 0x00, 0x00, // Protocol version 60002
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0x02, // Varint for number of block locator hashes
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0xe0, 0xde, 0x06, 0x44, 0x68, 0x13, 0x2c, 0x63,
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0xd2, 0x20, 0xcc, 0x69, 0x12, 0x83, 0xcb, 0x65,
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0xbc, 0xaa, 0xe4, 0x79, 0x94, 0xef, 0x9e, 0x7b,
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0xad, 0xe7, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 99500 hash
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0x35, 0x75, 0x95, 0xb7, 0xf6, 0x8c, 0xb1, 0x60,
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0xcc, 0xba, 0x2c, 0x9a, 0xc5, 0x42, 0x5f, 0xd9,
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0x6f, 0x0a, 0x01, 0x3d, 0xc9, 0x7e, 0xc8, 0x40,
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0x0f, 0x71, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 99499 hash
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0x06, 0xe5, 0x33, 0xfd, 0x1a, 0xda, 0x86, 0x39,
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0x1f, 0x3f, 0x6c, 0x34, 0x32, 0x04, 0xb0, 0xd2,
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0x78, 0xd4, 0xaa, 0xec, 0x1c, 0x0b, 0x20, 0xaa,
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0x27, 0xba, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, // Hash stop
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}
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tests := []struct {
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in *MsgGetHeaders // Message to encode
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out *MsgGetHeaders // Expected decoded message
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buf []byte // Wire encoding
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pver uint32 // Protocol version for wire encoding
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enc MessageEncoding // Message encoding format
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}{
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// Latest protocol version with no block locators.
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{
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noLocators,
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noLocators,
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noLocatorsEncoded,
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ProtocolVersion,
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BaseEncoding,
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},
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// Latest protocol version with multiple block locators.
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{
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multiLocators,
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multiLocators,
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multiLocatorsEncoded,
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ProtocolVersion,
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BaseEncoding,
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},
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// Protocol version BIP0035Version with no block locators.
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{
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noLocators,
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noLocators,
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noLocatorsEncoded,
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BIP0035Version,
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BaseEncoding,
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},
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// Protocol version BIP0035Version with multiple block locators.
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{
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multiLocators,
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multiLocators,
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multiLocatorsEncoded,
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BIP0035Version,
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BaseEncoding,
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},
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// Protocol version BIP0031Version with no block locators.
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{
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noLocators,
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noLocators,
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noLocatorsEncoded,
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BIP0031Version,
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BaseEncoding,
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},
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// Protocol version BIP0031Versionwith multiple block locators.
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{
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multiLocators,
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multiLocators,
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multiLocatorsEncoded,
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BIP0031Version,
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BaseEncoding,
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},
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// Protocol version NetAddressTimeVersion with no block locators.
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{
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noLocators,
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noLocators,
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noLocatorsEncoded,
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NetAddressTimeVersion,
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BaseEncoding,
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},
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// Protocol version NetAddressTimeVersion multiple block locators.
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{
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multiLocators,
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multiLocators,
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multiLocatorsEncoded,
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NetAddressTimeVersion,
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BaseEncoding,
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},
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// Protocol version MultipleAddressVersion with no block locators.
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{
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noLocators,
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noLocators,
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noLocatorsEncoded,
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MultipleAddressVersion,
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BaseEncoding,
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},
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// Protocol version MultipleAddressVersion multiple block locators.
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{
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multiLocators,
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multiLocators,
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multiLocatorsEncoded,
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MultipleAddressVersion,
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BaseEncoding,
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},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Encode the message to wire format.
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var buf bytes.Buffer
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err := test.in.BtcEncode(&buf, test.pver, test.enc)
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if err != nil {
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t.Errorf("BtcEncode #%d error %v", i, err)
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continue
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}
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if !bytes.Equal(buf.Bytes(), test.buf) {
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t.Errorf("BtcEncode #%d\n got: %s want: %s", i,
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spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
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continue
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}
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// Decode the message from wire format.
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var msg MsgGetHeaders
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rbuf := bytes.NewReader(test.buf)
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err = msg.BtcDecode(rbuf, test.pver, test.enc)
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if err != nil {
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t.Errorf("BtcDecode #%d error %v", i, err)
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continue
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}
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if !reflect.DeepEqual(&msg, test.out) {
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t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
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spew.Sdump(&msg), spew.Sdump(test.out))
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continue
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}
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}
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}
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// TestGetHeadersWireErrors performs negative tests against wire encode and
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// decode of MsgGetHeaders to confirm error paths work correctly.
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func TestGetHeadersWireErrors(t *testing.T) {
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// Set protocol inside getheaders message. Use protocol version 60002
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// specifically here instead of the latest because the test data is
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// using bytes encoded with that protocol version.
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pver := uint32(60002)
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wireErr := &MessageError{}
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// Block 99499 hash.
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hashStr := "2710f40c87ec93d010a6fd95f42c59a2cbacc60b18cf6b7957535"
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hashLocator, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// Block 99500 hash.
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hashStr = "2e7ad7b9eef9479e4aabc65cb831269cc20d2632c13684406dee0"
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hashLocator2, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// Block 100000 hash.
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hashStr = "3ba27aa200b1cecaad478d2b00432346c3f1f3986da1afd33e506"
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hashStop, err := chainhash.NewHashFromStr(hashStr)
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if err != nil {
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t.Errorf("NewHashFromStr: %v", err)
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}
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// MsgGetHeaders message with multiple block locators and a stop hash.
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baseGetHeaders := NewMsgGetHeaders()
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baseGetHeaders.ProtocolVersion = pver
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baseGetHeaders.HashStop = *hashStop
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baseGetHeaders.AddBlockLocatorHash(hashLocator2)
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baseGetHeaders.AddBlockLocatorHash(hashLocator)
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baseGetHeadersEncoded := []byte{
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0x62, 0xea, 0x00, 0x00, // Protocol version 60002
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0x02, // Varint for number of block locator hashes
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0xe0, 0xde, 0x06, 0x44, 0x68, 0x13, 0x2c, 0x63,
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0xd2, 0x20, 0xcc, 0x69, 0x12, 0x83, 0xcb, 0x65,
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0xbc, 0xaa, 0xe4, 0x79, 0x94, 0xef, 0x9e, 0x7b,
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0xad, 0xe7, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 99500 hash
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0x35, 0x75, 0x95, 0xb7, 0xf6, 0x8c, 0xb1, 0x60,
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0xcc, 0xba, 0x2c, 0x9a, 0xc5, 0x42, 0x5f, 0xd9,
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0x6f, 0x0a, 0x01, 0x3d, 0xc9, 0x7e, 0xc8, 0x40,
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0x0f, 0x71, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 99499 hash
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0x06, 0xe5, 0x33, 0xfd, 0x1a, 0xda, 0x86, 0x39,
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0x1f, 0x3f, 0x6c, 0x34, 0x32, 0x04, 0xb0, 0xd2,
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0x78, 0xd4, 0xaa, 0xec, 0x1c, 0x0b, 0x20, 0xaa,
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0x27, 0xba, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, // Hash stop
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}
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// Message that forces an error by having more than the max allowed
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// block locator hashes.
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maxGetHeaders := NewMsgGetHeaders()
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for i := 0; i < MaxBlockLocatorsPerMsg; i++ {
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maxGetHeaders.AddBlockLocatorHash(&mainNetGenesisHash)
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}
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maxGetHeaders.BlockLocatorHashes = append(maxGetHeaders.BlockLocatorHashes,
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&mainNetGenesisHash)
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maxGetHeadersEncoded := []byte{
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0x62, 0xea, 0x00, 0x00, // Protocol version 60002
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0xfd, 0xf5, 0x01, // Varint for number of block loc hashes (501)
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}
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tests := []struct {
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in *MsgGetHeaders // Value to encode
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buf []byte // Wire encoding
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pver uint32 // Protocol version for wire encoding
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enc MessageEncoding // Message encoding format
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max int // Max size of fixed buffer to induce errors
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writeErr error // Expected write error
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readErr error // Expected read error
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}{
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// Force error in protocol version.
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{baseGetHeaders, baseGetHeadersEncoded, pver, BaseEncoding, 0, io.ErrShortWrite, io.EOF},
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// Force error in block locator hash count.
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{baseGetHeaders, baseGetHeadersEncoded, pver, BaseEncoding, 4, io.ErrShortWrite, io.EOF},
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// Force error in block locator hashes.
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{baseGetHeaders, baseGetHeadersEncoded, pver, BaseEncoding, 5, io.ErrShortWrite, io.EOF},
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// Force error in stop hash.
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{baseGetHeaders, baseGetHeadersEncoded, pver, BaseEncoding, 69, io.ErrShortWrite, io.EOF},
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// Force error with greater than max block locator hashes.
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{maxGetHeaders, maxGetHeadersEncoded, pver, BaseEncoding, 7, wireErr, wireErr},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Encode to wire format.
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w := newFixedWriter(test.max)
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err := test.in.BtcEncode(w, test.pver, test.enc)
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if reflect.TypeOf(err) != reflect.TypeOf(test.writeErr) {
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t.Errorf("BtcEncode #%d wrong error got: %v, want: %v",
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i, err, test.writeErr)
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continue
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}
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// For errors which are not of type MessageError, check them for
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// equality.
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if _, ok := err.(*MessageError); !ok {
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if err != test.writeErr {
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t.Errorf("BtcEncode #%d wrong error got: %v, "+
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"want: %v", i, err, test.writeErr)
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continue
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}
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}
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// Decode from wire format.
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var msg MsgGetHeaders
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r := newFixedReader(test.max, test.buf)
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err = msg.BtcDecode(r, test.pver, test.enc)
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if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
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t.Errorf("BtcDecode #%d wrong error got: %v, want: %v",
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i, err, test.readErr)
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continue
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}
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// For errors which are not of type MessageError, check them for
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// equality.
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if _, ok := err.(*MessageError); !ok {
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if err != test.readErr {
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t.Errorf("BtcDecode #%d wrong error got: %v, "+
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"want: %v", i, err, test.readErr)
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continue
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}
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}
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}
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}
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