// TestMessage tests the Read/WriteMessage and Read/WriteMessageN API.
func TestMessage(t *testing.T) {
pver := wire.ProtocolVersion
// Create the various types of messages to test.
// MsgVersion.
addrYou := &net.TCPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333}
you, err := wire.NewNetAddress(addrYou, wire.SFNodeNetwork)
if err != nil {
t.Errorf("NewNetAddress: %v", err)
}
you.Timestamp = time.Time{} // Version message has zero value timestamp.
addrMe := &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8333}
me, err := wire.NewNetAddress(addrMe, wire.SFNodeNetwork)
if err != nil {
t.Errorf("NewNetAddress: %v", err)
}
me.Timestamp = time.Time{} // Version message has zero value timestamp.
msgVersion := wire.NewMsgVersion(me, you, 123123, 0)
msgVerack := wire.NewMsgVerAck()
msgGetAddr := wire.NewMsgGetAddr()
msgAddr := wire.NewMsgAddr()
msgGetBlocks := wire.NewMsgGetBlocks(&chainhash.Hash{})
msgBlock := &testBlock
msgInv := wire.NewMsgInv()
msgGetData := wire.NewMsgGetData()
msgNotFound := wire.NewMsgNotFound()
msgTx := wire.NewMsgTx()
msgPing := wire.NewMsgPing(123123)
msgPong := wire.NewMsgPong(123123)
msgGetHeaders := wire.NewMsgGetHeaders()
msgHeaders := wire.NewMsgHeaders()
msgAlert := wire.NewMsgAlert([]byte("payload"), []byte("signature"))
msgMemPool := wire.NewMsgMemPool()
msgFilterAdd := wire.NewMsgFilterAdd([]byte{0x01})
msgFilterClear := wire.NewMsgFilterClear()
msgFilterLoad := wire.NewMsgFilterLoad([]byte{0x01}, 10, 0, wire.BloomUpdateNone)
bh := wire.NewBlockHeader(
int32(0), // Version
&chainhash.Hash{}, // PrevHash
&chainhash.Hash{}, // MerkleRoot
&chainhash.Hash{}, // StakeRoot
uint16(0x0000), // VoteBits
[6]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // FinalState
uint16(0x0000), // Voters
uint8(0x00), // FreshStake
uint8(0x00), // Revocations
uint32(0), // Poolsize
uint32(0x00000000), // Bits
int64(0x0000000000000000), // Sbits
uint32(0), // Height
uint32(0), // Size
uint32(0x00000000), // Nonce
[36]byte{}, // ExtraData
)
msgMerkleBlock := wire.NewMsgMerkleBlock(bh)
msgReject := wire.NewMsgReject("block", wire.RejectDuplicate, "duplicate block")
tests := []struct {
in wire.Message // Value to encode
out wire.Message // Expected decoded value
pver uint32 // Protocol version for wire encoding
dcrnet wire.CurrencyNet // Network to use for wire encoding
bytes int // Expected num bytes read/written
}{
{msgVersion, msgVersion, pver, wire.MainNet, 125}, // [0]
{msgVerack, msgVerack, pver, wire.MainNet, 24}, // [1]
{msgGetAddr, msgGetAddr, pver, wire.MainNet, 24}, // [2]
{msgAddr, msgAddr, pver, wire.MainNet, 25}, // [3]
{msgGetBlocks, msgGetBlocks, pver, wire.MainNet, 61}, // [4]
{msgBlock, msgBlock, pver, wire.MainNet, 522}, // [5]
{msgInv, msgInv, pver, wire.MainNet, 25}, // [6]
{msgGetData, msgGetData, pver, wire.MainNet, 25}, // [7]
{msgNotFound, msgNotFound, pver, wire.MainNet, 25}, // [8]
{msgTx, msgTx, pver, wire.MainNet, 39}, // [9]
{msgPing, msgPing, pver, wire.MainNet, 32}, // [10]
{msgPong, msgPong, pver, wire.MainNet, 32}, // [11]
{msgGetHeaders, msgGetHeaders, pver, wire.MainNet, 61}, // [12]
{msgHeaders, msgHeaders, pver, wire.MainNet, 25}, // [13]
{msgAlert, msgAlert, pver, wire.MainNet, 42}, // [14]
{msgMemPool, msgMemPool, pver, wire.MainNet, 24}, // [15]
{msgFilterAdd, msgFilterAdd, pver, wire.MainNet, 26}, // [16]
{msgFilterClear, msgFilterClear, pver, wire.MainNet, 24}, // [17]
{msgFilterLoad, msgFilterLoad, pver, wire.MainNet, 35}, // [18]
{msgMerkleBlock, msgMerkleBlock, pver, wire.MainNet, 215}, // [19]
{msgReject, msgReject, pver, wire.MainNet, 79}, // [20]
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
var buf bytes.Buffer
nw, err := wire.WriteMessageN(&buf, test.in, test.pver, test.dcrnet)
if err != nil {
t.Errorf("WriteMessage #%d error %v", i, err)
continue
}
// Ensure the number of bytes written match the expected value.
if nw != test.bytes {
t.Errorf("WriteMessage #%d unexpected num bytes "+
"written - got %d, want %d", i, nw, test.bytes)
}
// Decode from wire format.
rbuf := bytes.NewReader(buf.Bytes())
nr, msg, _, err := wire.ReadMessageN(rbuf, test.pver, test.dcrnet)
if err != nil {
t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
spew.Sdump(msg))
continue
}
if !reflect.DeepEqual(msg, test.out) {
t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
// Ensure the number of bytes read match the expected value.
if nr != test.bytes {
t.Errorf("ReadMessage #%d unexpected num bytes read - "+
"got %d, want %d", i, nr, test.bytes)
}
}
// Do the same thing for Read/WriteMessage, but ignore the bytes since
// they don't return them.
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
var buf bytes.Buffer
err := wire.WriteMessage(&buf, test.in, test.pver, test.dcrnet)
if err != nil {
t.Errorf("WriteMessage #%d error %v", i, err)
continue
}
// Decode from wire format.
rbuf := bytes.NewReader(buf.Bytes())
msg, _, err := wire.ReadMessage(rbuf, test.pver, test.dcrnet)
if err != nil {
t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
spew.Sdump(msg))
continue
}
if !reflect.DeepEqual(msg, test.out) {
t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
}
}
// TestReadMessageWireErrors performs negative tests against wire decoding into
// concrete messages to confirm error paths work correctly.
func TestReadMessageWireErrors(t *testing.T) {
pver := wire.ProtocolVersion
dcrnet := wire.MainNet
// Ensure message errors are as expected with no function specified.
wantErr := "something bad happened"
testErr := wire.MessageError{Description: wantErr}
if testErr.Error() != wantErr {
t.Errorf("MessageError: wrong error - got %v, want %v",
testErr.Error(), wantErr)
}
// Ensure message errors are as expected with a function specified.
wantFunc := "foo"
testErr = wire.MessageError{Func: wantFunc, Description: wantErr}
if testErr.Error() != wantFunc+": "+wantErr {
t.Errorf("MessageError: wrong error - got %v, want %v",
testErr.Error(), wantErr)
}
// Wire encoded bytes for main and testnet networks magic identifiers.
testNet3Bytes := makeHeader(wire.TestNet, "", 0, 0)
// Wire encoded bytes for a message that exceeds max overall message
// length.
mpl := uint32(wire.MaxMessagePayload)
exceedMaxPayloadBytes := makeHeader(dcrnet, "getaddr", mpl+1, 0)
// Wire encoded bytes for a command which is invalid utf-8.
badCommandBytes := makeHeader(dcrnet, "bogus", 0, 0)
badCommandBytes[4] = 0x81
// Wire encoded bytes for a command which is valid, but not supported.
unsupportedCommandBytes := makeHeader(dcrnet, "bogus", 0, 0)
// Wire encoded bytes for a message which exceeds the max payload for
// a specific message type.
exceedTypePayloadBytes := makeHeader(dcrnet, "getaddr", 1, 0)
// Wire encoded bytes for a message which does not deliver the full
// payload according to the header length.
shortPayloadBytes := makeHeader(dcrnet, "version", 115, 0)
// Wire encoded bytes for a message with a bad checksum.
badChecksumBytes := makeHeader(dcrnet, "version", 2, 0xbeef)
badChecksumBytes = append(badChecksumBytes, []byte{0x0, 0x0}...)
// Wire encoded bytes for a message which has a valid header, but is
// the wrong format. An addr starts with a varint of the number of
// contained in the message. Claim there is two, but don't provide
// them. At the same time, forge the header fields so the message is
// otherwise accurate.
badMessageBytes := makeHeader(dcrnet, "addr", 1, 0xeaadc31c)
badMessageBytes = append(badMessageBytes, 0x2)
// Wire encoded bytes for a message which the header claims has 15k
// bytes of data to discard.
discardBytes := makeHeader(dcrnet, "bogus", 15*1024, 0)
tests := []struct {
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
dcrnet wire.CurrencyNet // Decred network for wire encoding
max int // Max size of fixed buffer to induce errors
readErr error // Expected read error
bytes int // Expected num bytes read
}{
// Latest protocol version with intentional read errors.
// Short header. [0]
{
[]byte{},
pver,
dcrnet,
0,
io.EOF,
0,
},
// Wrong network. Want MainNet, but giving TestNet. [1]
{
testNet3Bytes,
pver,
dcrnet,
len(testNet3Bytes),
&wire.MessageError{},
24,
},
// Exceed max overall message payload length. [2]
{
exceedMaxPayloadBytes,
pver,
dcrnet,
len(exceedMaxPayloadBytes),
&wire.MessageError{},
24,
},
// Invalid UTF-8 command. [3]
{
badCommandBytes,
pver,
dcrnet,
len(badCommandBytes),
&wire.MessageError{},
24,
},
// Valid, but unsupported command. [4]
{
unsupportedCommandBytes,
pver,
dcrnet,
len(unsupportedCommandBytes),
&wire.MessageError{},
24,
},
// Exceed max allowed payload for a message of a specific type. [5]
{
exceedTypePayloadBytes,
pver,
dcrnet,
len(exceedTypePayloadBytes),
&wire.MessageError{},
24,
},
// Message with a payload shorter than the header indicates. [6]
{
shortPayloadBytes,
pver,
dcrnet,
len(shortPayloadBytes),
io.EOF,
24,
},
// Message with a bad checksum. [7]
{
badChecksumBytes,
pver,
dcrnet,
len(badChecksumBytes),
&wire.MessageError{},
26,
},
// Message with a valid header, but wrong format. [8]
{
badMessageBytes,
pver,
dcrnet,
len(badMessageBytes),
&wire.MessageError{},
25,
},
// 15k bytes of data to discard. [9]
{
discardBytes,
pver,
dcrnet,
len(discardBytes),
&wire.MessageError{},
24,
},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Decode from wire format.
r := newFixedReader(test.max, test.buf)
nr, _, _, err := wire.ReadMessageN(r, test.pver, test.dcrnet)
if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
"want: %T", i, err, err, test.readErr)
continue
}
// Ensure the number of bytes written match the expected value.
if nr != test.bytes {
t.Errorf("ReadMessage #%d unexpected num bytes read - "+
"got %d, want %d", i, nr, test.bytes)
}
// For errors which are not of type wire.MessageError, check
// them for equality.
if _, ok := err.(*wire.MessageError); !ok {
if err != test.readErr {
t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
"want: %v <%T>", i, err, err,
test.readErr, test.readErr)
continue
}
}
}
}