76f6906e50
The error handling in the tests for the wire package were recently updated to make use of the new errors.Is and errors.As standard library functions introduced in Go 1.13, but they were only updated mechanically as opposed to being updated to use the new capabilities of errors.Is checking for a specific error code as opposed to just the error type. Consequently, this updates the tests to remove all of the additional type checking via errors.As and instead look for the exact expected error code via errors.Is. This change is desirable since only examining the type of error doesn't prove that the test is actually hitting the specific error it intends too, rather only that it is hitting an error of the same type. It also corrects a couple of tests and error returns that were discovered to be incorrect in the process.
530 lines
18 KiB
Go
530 lines
18 KiB
Go
// Copyright (c) 2013-2016 The btcsuite developers
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// Copyright (c) 2015-2020 The Decred 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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"errors"
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"io"
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"net"
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"reflect"
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"strings"
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"testing"
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"time"
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"github.com/davecgh/go-spew/spew"
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)
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// TestVersion tests the MsgVersion API.
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func TestVersion(t *testing.T) {
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pver := ProtocolVersion
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// Create version message data.
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lastBlock := int32(234234)
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tcpAddrMe := &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8333}
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me, err := NewNetAddress(tcpAddrMe, SFNodeNetwork)
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if err != nil {
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t.Errorf("NewNetAddress: %v", err)
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}
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tcpAddrYou := &net.TCPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333}
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you, err := NewNetAddress(tcpAddrYou, SFNodeNetwork)
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if err != nil {
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t.Errorf("NewNetAddress: %v", err)
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}
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nonce, err := RandomUint64()
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if err != nil {
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t.Errorf("RandomUint64: error generating nonce: %v", err)
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}
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// Ensure we get the correct data back out.
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msg := NewMsgVersion(me, you, nonce, lastBlock)
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if msg.ProtocolVersion != int32(pver) {
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t.Errorf("NewMsgVersion: wrong protocol version - got %v, want %v",
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msg.ProtocolVersion, pver)
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}
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if !reflect.DeepEqual(&msg.AddrMe, me) {
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t.Errorf("NewMsgVersion: wrong me address - got %v, want %v",
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spew.Sdump(&msg.AddrMe), spew.Sdump(me))
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}
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if !reflect.DeepEqual(&msg.AddrYou, you) {
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t.Errorf("NewMsgVersion: wrong you address - got %v, want %v",
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spew.Sdump(&msg.AddrYou), spew.Sdump(you))
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}
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if msg.Nonce != nonce {
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t.Errorf("NewMsgVersion: wrong nonce - got %v, want %v",
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msg.Nonce, nonce)
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}
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if msg.UserAgent != DefaultUserAgent {
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t.Errorf("NewMsgVersion: wrong user agent - got %v, want %v",
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msg.UserAgent, DefaultUserAgent)
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}
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if msg.LastBlock != lastBlock {
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t.Errorf("NewMsgVersion: wrong last block - got %v, want %v",
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msg.LastBlock, lastBlock)
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}
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if msg.DisableRelayTx {
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t.Errorf("NewMsgVersion: disable relay tx is not false by "+
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"default - got %v, want %v", msg.DisableRelayTx, false)
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}
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msg.AddUserAgent("myclient", "1.2.3", "optional", "comments")
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customUserAgent := DefaultUserAgent + "myclient:1.2.3(optional; comments)/"
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if msg.UserAgent != customUserAgent {
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t.Errorf("AddUserAgent: wrong user agent - got %s, want %s",
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msg.UserAgent, customUserAgent)
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}
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msg.AddUserAgent("mygui", "3.4.5")
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customUserAgent += "mygui:3.4.5/"
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if msg.UserAgent != customUserAgent {
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t.Errorf("AddUserAgent: wrong user agent - got %s, want %s",
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msg.UserAgent, customUserAgent)
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}
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// accounting for ":", "/"
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err = msg.AddUserAgent(strings.Repeat("t",
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MaxUserAgentLen-len(customUserAgent)-2+1), "")
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if !errors.Is(err, ErrUserAgentTooLong) {
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t.Errorf("AddUserAgent: expected error not received - got %v, want %v",
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err, ErrUserAgentTooLong)
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}
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// Version message should not have any services set by default.
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if msg.Services != 0 {
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t.Errorf("NewMsgVersion: wrong default services - got %v, want %v",
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msg.Services, 0)
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}
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if msg.HasService(SFNodeNetwork) {
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t.Errorf("HasService: SFNodeNetwork service is set")
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}
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// Ensure the command is expected value.
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wantCmd := "version"
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if cmd := msg.Command(); cmd != wantCmd {
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t.Errorf("NewMsgVersion: 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.
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// Protocol version 4 bytes + services 8 bytes + timestamp 8 bytes +
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// remote and local net addresses + nonce 8 bytes + length of user agent
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// (varInt) + max allowed user agent length + last block 4 bytes +
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// relay transactions flag 1 byte.
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wantPayload := uint32(358)
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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 max payload length is not more than MaxMessagePayload.
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if maxPayload > MaxMessagePayload {
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t.Fatalf("MaxPayloadLength: payload length (%v) for protocol "+
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"version %d exceeds MaxMessagePayload (%v).", maxPayload, pver,
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MaxMessagePayload)
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}
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// Ensure adding the full service node flag works.
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msg.AddService(SFNodeNetwork)
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if msg.Services != SFNodeNetwork {
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t.Errorf("AddService: wrong services - got %v, want %v",
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msg.Services, SFNodeNetwork)
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}
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if !msg.HasService(SFNodeNetwork) {
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t.Errorf("HasService: SFNodeNetwork service not set")
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}
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// Use a fake connection.
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conn := &fakeConn{localAddr: tcpAddrMe, remoteAddr: tcpAddrYou}
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msg, err = NewMsgVersionFromConn(conn, nonce, lastBlock)
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if err != nil {
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t.Errorf("NewMsgVersionFromConn: %v", err)
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}
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// Ensure we get the correct connection data back out.
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if !msg.AddrMe.IP.Equal(tcpAddrMe.IP) {
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t.Errorf("NewMsgVersionFromConn: wrong me ip - got %v, want %v",
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msg.AddrMe.IP, tcpAddrMe.IP)
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}
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if !msg.AddrYou.IP.Equal(tcpAddrYou.IP) {
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t.Errorf("NewMsgVersionFromConn: wrong you ip - got %v, want %v",
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msg.AddrYou.IP, tcpAddrYou.IP)
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}
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// Use a fake connection with local UDP addresses to force a failure.
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conn = &fakeConn{
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localAddr: &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8333},
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remoteAddr: tcpAddrYou,
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}
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_, err = NewMsgVersionFromConn(conn, nonce, lastBlock)
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if !errors.Is(err, ErrInvalidNetAddr) {
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t.Errorf("NewMsgVersionFromConn: expected error not received "+
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"- got %v, want %v", err, ErrInvalidNetAddr)
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}
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// Use a fake connection with remote UDP addresses to force a failure.
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conn = &fakeConn{
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localAddr: tcpAddrMe,
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remoteAddr: &net.UDPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333},
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}
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_, err = NewMsgVersionFromConn(conn, nonce, lastBlock)
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if !errors.Is(err, ErrInvalidNetAddr) {
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t.Errorf("NewMsgVersionFromConn: expected error not received "+
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"- got %v, want %v", err, ErrInvalidNetAddr)
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}
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}
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// TestVersionWire tests the MsgVersion wire encode and decode for various
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// protocol versions.
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func TestVersionWire(t *testing.T) {
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// verRelayTxFalse and verRelayTxFalseEncoded is a version message as of
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// BIP0037Version with the transaction relay disabled.
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baseVersionBIP0037Copy := *baseVersionBIP0037
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verRelayTxFalse := &baseVersionBIP0037Copy
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verRelayTxFalse.DisableRelayTx = true
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verRelayTxFalseEncoded := make([]byte, len(baseVersionBIP0037Encoded))
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copy(verRelayTxFalseEncoded, baseVersionBIP0037Encoded)
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verRelayTxFalseEncoded[len(verRelayTxFalseEncoded)-1] = 0
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tests := []struct {
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in *MsgVersion // Message to encode
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out *MsgVersion // 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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}{
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// Latest protocol version.
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{
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baseVersionBIP0037,
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baseVersionBIP0037,
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baseVersionBIP0037Encoded,
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ProtocolVersion,
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},
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{
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verRelayTxFalse,
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verRelayTxFalse,
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verRelayTxFalseEncoded,
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ProtocolVersion,
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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)
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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 MsgVersion
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rbuf := bytes.NewBuffer(test.buf)
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err = msg.BtcDecode(rbuf, test.pver)
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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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// TestVersionWireErrors 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 TestVersionWireErrors(t *testing.T) {
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// Use protocol version 60002 specifically here instead of the latest
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// because the test data is using bytes encoded with that protocol
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// version.
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pver := uint32(60002)
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// Ensure calling MsgVersion.BtcDecode with a non *bytes.Buffer returns
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// error.
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fr := newFixedReader(0, []byte{})
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if err := baseVersion.BtcDecode(fr, pver); err == nil {
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t.Errorf("Did not received error when calling " +
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"MsgVersion.BtcDecode with non *bytes.Buffer")
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}
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// Copy the base version and change the user agent to exceed max limits.
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bvc := *baseVersion
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exceedUAVer := &bvc
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newUA := "/" + strings.Repeat("t", MaxUserAgentLen-8+1) + ":0.0.1/"
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exceedUAVer.UserAgent = newUA
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// Encode the new UA length as a varint.
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var newUAVarIntBuf bytes.Buffer
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err := WriteVarInt(&newUAVarIntBuf, pver, uint64(len(newUA)))
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if err != nil {
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t.Errorf("WriteVarInt: error %v", err)
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}
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// Make a new buffer big enough to hold the base version plus the new
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// bytes for the bigger varint to hold the new size of the user agent
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// and the new user agent string. Then stitch it all together.
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newLen := len(baseVersionEncoded) - len(baseVersion.UserAgent)
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newLen = newLen + len(newUAVarIntBuf.Bytes()) - 1 + len(newUA)
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exceedUAVerEncoded := make([]byte, newLen)
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copy(exceedUAVerEncoded, baseVersionEncoded[0:80])
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copy(exceedUAVerEncoded[80:], newUAVarIntBuf.Bytes())
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copy(exceedUAVerEncoded[83:], []byte(newUA))
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copy(exceedUAVerEncoded[83+len(newUA):], baseVersionEncoded[97:100])
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tests := []struct {
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in *MsgVersion // 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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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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{baseVersion, baseVersionEncoded, pver, 0, io.ErrShortWrite, io.EOF},
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// Force error in services.
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{baseVersion, baseVersionEncoded, pver, 4, io.ErrShortWrite, io.EOF},
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// Force error in timestamp.
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{baseVersion, baseVersionEncoded, pver, 12, io.ErrShortWrite, io.EOF},
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// Force error in remote address.
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{baseVersion, baseVersionEncoded, pver, 20, io.ErrShortWrite, io.EOF},
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// Force error in local address.
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{baseVersion, baseVersionEncoded, pver, 47, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force error in nonce.
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{baseVersion, baseVersionEncoded, pver, 73, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force error in user agent length.
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{baseVersion, baseVersionEncoded, pver, 81, io.ErrShortWrite, io.EOF},
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// Force error in user agent.
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{baseVersion, baseVersionEncoded, pver, 82, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force error in last block.
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{baseVersion, baseVersionEncoded, pver, 98, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force error due to user agent too big
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{exceedUAVer, exceedUAVerEncoded, pver, newLen, ErrUserAgentTooLong, ErrUserAgentTooLong},
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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)
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if !errors.Is(err, test.writeErr) {
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t.Errorf("BtcEncode #%d wrong error got: %v, want: %v", i, err,
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test.writeErr)
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continue
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}
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// Decode from wire format.
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var msg MsgVersion
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buf := bytes.NewBuffer(test.buf[0:test.max])
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err = msg.BtcDecode(buf, test.pver)
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if !errors.Is(err, test.readErr) {
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t.Errorf("BtcDecode #%d wrong error got: %v, want: %v", i, err,
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test.readErr)
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continue
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}
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}
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}
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// TestVersionOptionalFields performs tests to ensure that an encoded version
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// messages that omit optional fields are handled correctly.
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func TestVersionOptionalFields(t *testing.T) {
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// onlyRequiredVersion is a version message that only contains the
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// required versions and all other values set to their default values.
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onlyRequiredVersion := MsgVersion{
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ProtocolVersion: 60002,
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Services: SFNodeNetwork,
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Timestamp: time.Unix(0x495fab29, 0), // 2009-01-03 12:15:05 -0600 CST)
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AddrYou: NetAddress{
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Timestamp: time.Time{}, // Zero value -- no timestamp in version
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Services: SFNodeNetwork,
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IP: net.ParseIP("192.168.0.1"),
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Port: 8333,
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},
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}
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onlyRequiredVersionEncoded := make([]byte, len(baseVersionEncoded)-55)
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copy(onlyRequiredVersionEncoded, baseVersionEncoded)
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// addrMeVersion is a version message that contains all fields through
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// the AddrMe field.
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addrMeVersion := onlyRequiredVersion
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addrMeVersion.AddrMe = NetAddress{
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Timestamp: time.Time{}, // Zero value -- no timestamp in version
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Services: SFNodeNetwork,
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IP: net.ParseIP("127.0.0.1"),
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Port: 8333,
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}
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addrMeVersionEncoded := make([]byte, len(baseVersionEncoded)-29)
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copy(addrMeVersionEncoded, baseVersionEncoded)
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// nonceVersion is a version message that contains all fields through
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// the Nonce field.
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nonceVersion := addrMeVersion
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nonceVersion.Nonce = 123123 // 0x1e0f3
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nonceVersionEncoded := make([]byte, len(baseVersionEncoded)-21)
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copy(nonceVersionEncoded, baseVersionEncoded)
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// uaVersion is a version message that contains all fields through
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// the UserAgent field.
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uaVersion := nonceVersion
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uaVersion.UserAgent = "/dcrdtest:0.0.1/"
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uaVersionEncoded := make([]byte, len(baseVersionEncoded)-4)
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copy(uaVersionEncoded, baseVersionEncoded)
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// lastBlockVersion is a version message that contains all fields
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// through the LastBlock field.
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lastBlockVersion := uaVersion
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lastBlockVersion.LastBlock = 234234 // 0x392fa
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lastBlockVersionEncoded := make([]byte, len(baseVersionEncoded))
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copy(lastBlockVersionEncoded, baseVersionEncoded)
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tests := []struct {
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msg *MsgVersion // Expected message
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buf []byte // Wire encoding
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pver uint32 // Protocol version for wire encoding
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}{
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{
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&onlyRequiredVersion,
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onlyRequiredVersionEncoded,
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ProtocolVersion,
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},
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{
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&addrMeVersion,
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addrMeVersionEncoded,
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ProtocolVersion,
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},
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{
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&nonceVersion,
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nonceVersionEncoded,
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ProtocolVersion,
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},
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{
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&uaVersion,
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uaVersionEncoded,
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ProtocolVersion,
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},
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{
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&lastBlockVersion,
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lastBlockVersionEncoded,
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ProtocolVersion,
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},
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}
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for i, test := range tests {
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// Decode the message from wire format.
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var msg MsgVersion
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rbuf := bytes.NewBuffer(test.buf)
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err := msg.BtcDecode(rbuf, test.pver)
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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.msg) {
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t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
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spew.Sdump(msg), spew.Sdump(test.msg))
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continue
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}
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}
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}
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// baseVersion is used in the various tests as a baseline MsgVersion.
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var baseVersion = &MsgVersion{
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ProtocolVersion: 60002,
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Services: SFNodeNetwork,
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Timestamp: time.Unix(0x495fab29, 0), // 2009-01-03 12:15:05 -0600 CST)
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AddrYou: NetAddress{
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Timestamp: time.Time{}, // Zero value -- no timestamp in version
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Services: SFNodeNetwork,
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IP: net.ParseIP("192.168.0.1"),
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Port: 8333,
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},
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AddrMe: NetAddress{
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Timestamp: time.Time{}, // Zero value -- no timestamp in version
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Services: SFNodeNetwork,
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IP: net.ParseIP("127.0.0.1"),
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Port: 8333,
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},
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Nonce: 123123, // 0x1e0f3
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UserAgent: "/dcrdtest:0.0.1/",
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LastBlock: 234234, // 0x392fa
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}
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// baseVersionEncoded is the wire encoded bytes for baseVersion using protocol
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// version 60002 and is used in the various tests.
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var baseVersionEncoded = []byte{
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0x62, 0xea, 0x00, 0x00, // Protocol version 60002
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
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0x29, 0xab, 0x5f, 0x49, 0x00, 0x00, 0x00, 0x00, // 64-bit Timestamp
|
|
// AddrYou -- No timestamp for NetAddress in version message
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xff, 0xff, 0xc0, 0xa8, 0x00, 0x01, // IP 192.168.0.1
|
|
0x20, 0x8d, // Port 8333 in big-endian
|
|
// AddrMe -- No timestamp for NetAddress in version message
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x01, // IP 127.0.0.1
|
|
0x20, 0x8d, // Port 8333 in big-endian
|
|
0xf3, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, // Nonce
|
|
0x10, // Varint for user agent length
|
|
0x2f, 0x64, 0x63, 0x72, 0x64, 0x74, 0x65, 0x73,
|
|
0x74, 0x3a, 0x30, 0x2e, 0x30, 0x2e, 0x31, 0x2f, // User agent
|
|
0xfa, 0x92, 0x03, 0x00, // Last block
|
|
}
|
|
|
|
// baseVersionBIP0037 is used in the various tests as a baseline MsgVersion for
|
|
// BIP0037.
|
|
var baseVersionBIP0037 = &MsgVersion{
|
|
ProtocolVersion: 70001,
|
|
Services: SFNodeNetwork,
|
|
Timestamp: time.Unix(0x495fab29, 0), // 2009-01-03 12:15:05 -0600 CST)
|
|
AddrYou: NetAddress{
|
|
Timestamp: time.Time{}, // Zero value -- no timestamp in version
|
|
Services: SFNodeNetwork,
|
|
IP: net.ParseIP("192.168.0.1"),
|
|
Port: 8333,
|
|
},
|
|
AddrMe: NetAddress{
|
|
Timestamp: time.Time{}, // Zero value -- no timestamp in version
|
|
Services: SFNodeNetwork,
|
|
IP: net.ParseIP("127.0.0.1"),
|
|
Port: 8333,
|
|
},
|
|
Nonce: 123123, // 0x1e0f3
|
|
UserAgent: "/dcrdtest:0.0.1/",
|
|
LastBlock: 234234, // 0x392fa
|
|
}
|
|
|
|
// baseVersionBIP0037Encoded is the wire encoded bytes for baseVersionBIP0037
|
|
// using protocol version BIP0037Version and is used in the various tests.
|
|
var baseVersionBIP0037Encoded = []byte{
|
|
0x71, 0x11, 0x01, 0x00, // Protocol version 70001
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
|
|
0x29, 0xab, 0x5f, 0x49, 0x00, 0x00, 0x00, 0x00, // 64-bit Timestamp
|
|
// AddrYou -- No timestamp for NetAddress in version message
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xff, 0xff, 0xc0, 0xa8, 0x00, 0x01, // IP 192.168.0.1
|
|
0x20, 0x8d, // Port 8333 in big-endian
|
|
// AddrMe -- No timestamp for NetAddress in version message
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // SFNodeNetwork
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x01, // IP 127.0.0.1
|
|
0x20, 0x8d, // Port 8333 in big-endian
|
|
0xf3, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, // Nonce
|
|
0x10, // Varint for user agent length
|
|
0x2f, 0x64, 0x63, 0x72, 0x64, 0x74, 0x65, 0x73,
|
|
0x74, 0x3a, 0x30, 0x2e, 0x30, 0x2e, 0x31, 0x2f, // User agent
|
|
0xfa, 0x92, 0x03, 0x00, // Last block
|
|
0x01, // Relay tx
|
|
}
|