p2p/conn: migrate to Protobuf (#4990)

Migrates the p2p connections to Protobuf. Supersedes #4800.

gogoproto's `NewDelimitedReader()` uses an internal buffer, which makes it unsuitable for reading individual messages from a shared reader (since any remaining data in the buffer will be discarded). We therefore add a new `protoio` package with an unbuffered `NewDelimitedReader()`. Additionally, the `NewDelimitedWriter()` returns the number of bytes written, and we've added `MarshalDelimited()` and `UnmarshalDelimited()`, to ease migration of existing code.

libs/protoio/io.go

@@ -0,0 +1,96 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Modified to return number of bytes written by Writer.WriteMsg(), and added byteReader.
+
+package protoio
+
+import (
+	"io"
+
+	"github.com/gogo/protobuf/proto"
+)
+
+type Writer interface {
+	WriteMsg(proto.Message) (int, error)
+}
+
+type WriteCloser interface {
+	Writer
+	io.Closer
+}
+
+type Reader interface {
+	ReadMsg(msg proto.Message) error
+}
+
+type ReadCloser interface {
+	Reader
+	io.Closer
+}
+
+type marshaler interface {
+	MarshalTo(data []byte) (n int, err error)
+}
+
+func getSize(v interface{}) (int, bool) {
+	if sz, ok := v.(interface {
+		Size() (n int)
+	}); ok {
+		return sz.Size(), true
+	} else if sz, ok := v.(interface {
+		ProtoSize() (n int)
+	}); ok {
+		return sz.ProtoSize(), true
+	} else {
+		return 0, false
+	}
+}
+
+// byteReader wraps an io.Reader and implements io.ByteReader. Reading one byte at a
+// time is extremely slow, but this is what Amino did already, and the caller can
+// wrap the reader in bufio.Reader if appropriate.
+type byteReader struct {
+	io.Reader
+	bytes []byte
+}
+
+func newByteReader(r io.Reader) *byteReader {
+	return &byteReader{
+		Reader: r,
+		bytes:  make([]byte, 1),
+	}
+}
+
+func (r *byteReader) ReadByte() (byte, error) {
+	_, err := r.Read(r.bytes)
+	if err != nil {
+		return 0, err
+	}
+	return r.bytes[0], nil
+}

libs/protoio/io_test.go

@@ -0,0 +1,157 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package protoio_test
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/gogo/protobuf/test"
+
+	"github.com/tendermint/tendermint/libs/protoio"
+)
+
+func iotest(writer protoio.WriteCloser, reader protoio.ReadCloser) error {
+	varint := make([]byte, binary.MaxVarintLen64)
+	size := 1000
+	msgs := make([]*test.NinOptNative, size)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := range msgs {
+		msgs[i] = test.NewPopulatedNinOptNative(r, true)
+		//issue 31
+		if i == 5 {
+			msgs[i] = &test.NinOptNative{}
+		}
+		//issue 31
+		if i == 999 {
+			msgs[i] = &test.NinOptNative{}
+		}
+		// FIXME Check size
+		bz, err := proto.Marshal(msgs[i])
+		if err != nil {
+			return err
+		}
+		visize := binary.PutUvarint(varint, uint64(len(bz)))
+		n, err := writer.WriteMsg(msgs[i])
+		if err != nil {
+			return err
+		}
+		if n != len(bz)+visize {
+			return fmt.Errorf("WriteMsg() wrote %v bytes, expected %v", n, len(bz)+visize) // nolint
+		}
+	}
+	if err := writer.Close(); err != nil {
+		return err
+	}
+	i := 0
+	for {
+		msg := &test.NinOptNative{}
+		if err := reader.ReadMsg(msg); err != nil {
+			if err == io.EOF {
+				break
+			}
+			return err
+		}
+		if err := msg.VerboseEqual(msgs[i]); err != nil {
+			return err
+		}
+		i++
+	}
+	if i != size {
+		panic("not enough messages read")
+	}
+	if err := reader.Close(); err != nil {
+		return err
+	}
+	return nil
+}
+
+type buffer struct {
+	*bytes.Buffer
+	closed bool
+}
+
+func (b *buffer) Close() error {
+	b.closed = true
+	return nil
+}
+
+func newBuffer() *buffer {
+	return &buffer{bytes.NewBuffer(nil), false}
+}
+
+func TestVarintNormal(t *testing.T) {
+	buf := newBuffer()
+	writer := protoio.NewDelimitedWriter(buf)
+	reader := protoio.NewDelimitedReader(buf, 1024*1024)
+	if err := iotest(writer, reader); err != nil {
+		t.Error(err)
+	}
+	if !buf.closed {
+		t.Fatalf("did not close buffer")
+	}
+}
+
+func TestVarintNoClose(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	writer := protoio.NewDelimitedWriter(buf)
+	reader := protoio.NewDelimitedReader(buf, 1024*1024)
+	if err := iotest(writer, reader); err != nil {
+		t.Error(err)
+	}
+}
+
+//issue 32
+func TestVarintMaxSize(t *testing.T) {
+	buf := newBuffer()
+	writer := protoio.NewDelimitedWriter(buf)
+	reader := protoio.NewDelimitedReader(buf, 20)
+	if err := iotest(writer, reader); err == nil {
+		t.Error(err)
+	} else {
+		t.Logf("%s", err)
+	}
+}
+
+func TestVarintError(t *testing.T) {
+	buf := newBuffer()
+	buf.Write([]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f})
+	reader := protoio.NewDelimitedReader(buf, 1024*1024)
+	msg := &test.NinOptNative{}
+	err := reader.ReadMsg(msg)
+	if err == nil {
+		t.Fatalf("Expected error")
+	}
+}

libs/protoio/reader.go

@@ -0,0 +1,88 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Modified from original GoGo Protobuf to not buffer the reader.
+
+package protoio
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+
+	"github.com/gogo/protobuf/proto"
+)
+
+// NewDelimitedReader reads varint-delimited Protobuf messages from a reader. Unlike the gogoproto
+// NewDelimitedReader, this does not buffer the reader, which may cause poor performance but is
+// necessary when only reading single messages (e.g. in the p2p package).
+func NewDelimitedReader(r io.Reader, maxSize int) ReadCloser {
+	var closer io.Closer
+	if c, ok := r.(io.Closer); ok {
+		closer = c
+	}
+	return &varintReader{newByteReader(r), nil, maxSize, closer}
+}
+
+type varintReader struct {
+	r       *byteReader
+	buf     []byte
+	maxSize int
+	closer  io.Closer
+}
+
+func (r *varintReader) ReadMsg(msg proto.Message) error {
+	length64, err := binary.ReadUvarint(newByteReader(r.r))
+	if err != nil {
+		return err
+	}
+	length := int(length64)
+	if length < 0 || length > r.maxSize {
+		return fmt.Errorf("message exceeds max size (%v > %v)", length, r.maxSize)
+	}
+	if len(r.buf) < length {
+		r.buf = make([]byte, length)
+	}
+	buf := r.buf[:length]
+	if _, err := io.ReadFull(r.r, buf); err != nil {
+		return err
+	}
+	return proto.Unmarshal(buf, msg)
+}
+
+func (r *varintReader) Close() error {
+	if r.closer != nil {
+		return r.closer.Close()
+	}
+	return nil
+}
+
+func UnmarshalDelimited(data []byte, msg proto.Message) error {
+	return NewDelimitedReader(bytes.NewReader(data), len(data)).ReadMsg(msg)
+}

libs/protoio/writer.go

@@ -0,0 +1,100 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Modified from original GoGo Protobuf to return number of bytes written.
+
+package protoio
+
+import (
+	"bytes"
+	"encoding/binary"
+	"io"
+
+	"github.com/gogo/protobuf/proto"
+)
+
+// NewDelimitedWriter writes a varint-delimited Protobuf message to a writer. It is
+// equivalent to the gogoproto NewDelimitedWriter, except WriteMsg() also returns the
+// number of bytes written, which is necessary in the p2p package.
+func NewDelimitedWriter(w io.Writer) WriteCloser {
+	return &varintWriter{w, make([]byte, binary.MaxVarintLen64), nil}
+}
+
+type varintWriter struct {
+	w      io.Writer
+	lenBuf []byte
+	buffer []byte
+}
+
+func (w *varintWriter) WriteMsg(msg proto.Message) (int, error) {
+	if m, ok := msg.(marshaler); ok {
+		n, ok := getSize(m)
+		if ok {
+			if n+binary.MaxVarintLen64 >= len(w.buffer) {
+				w.buffer = make([]byte, n+binary.MaxVarintLen64)
+			}
+			lenOff := binary.PutUvarint(w.buffer, uint64(n))
+			_, err := m.MarshalTo(w.buffer[lenOff:])
+			if err != nil {
+				return 0, err
+			}
+			_, err = w.w.Write(w.buffer[:lenOff+n])
+			return lenOff + n, err
+		}
+	}
+
+	// fallback
+	data, err := proto.Marshal(msg)
+	if err != nil {
+		return 0, err
+	}
+	length := uint64(len(data))
+	n := binary.PutUvarint(w.lenBuf, length)
+	_, err = w.w.Write(w.lenBuf[:n])
+	if err != nil {
+		return 0, err
+	}
+	_, err = w.w.Write(data)
+	return len(data) + n, err
+}
+
+func (w *varintWriter) Close() error {
+	if closer, ok := w.w.(io.Closer); ok {
+		return closer.Close()
+	}
+	return nil
+}
+
+func MarshalDelimited(msg proto.Message) ([]byte, error) {
+	var buf bytes.Buffer
+	_, err := NewDelimitedWriter(&buf).WriteMsg(msg)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}

p2p/conn/codec.go

@@ -1,14 +0,0 @@
-package conn
-
-import (
-	amino "github.com/tendermint/go-amino"
-
-	cryptoamino "github.com/tendermint/tendermint/crypto/encoding/amino"
-)
-
-var cdc *amino.Codec = amino.NewCodec()
-
-func init() {
-	cryptoamino.RegisterAmino(cdc)
-	RegisterPacket(cdc)
-}

p2p/conn/connection.go

@@ -2,25 +2,26 @@ package conn
 
 import (
 	"bufio"
-	"runtime/debug"
-
 	"errors"
 	"fmt"
 	"io"
 	"math"
 	"net"
 	"reflect"
+	"runtime/debug"
 	"sync"
 	"sync/atomic"
 	"time"
 
-	amino "github.com/tendermint/go-amino"
+	"github.com/gogo/protobuf/proto"
 
 	flow "github.com/tendermint/tendermint/libs/flowrate"
 	"github.com/tendermint/tendermint/libs/log"
 	tmmath "github.com/tendermint/tendermint/libs/math"
+	"github.com/tendermint/tendermint/libs/protoio"
 	"github.com/tendermint/tendermint/libs/service"
 	"github.com/tendermint/tendermint/libs/timer"
+	tmp2p "github.com/tendermint/tendermint/proto/p2p"
 )
 
 const (
@@ -66,7 +67,7 @@ There are two methods for sending messages:
 
 `Send(chID, msgBytes)` is a blocking call that waits until `msg` is
 successfully queued for the channel with the given id byte `chID`, or until the
-request times out.  The message `msg` is serialized using Go-Amino.
+request times out.  The message `msg` is serialized using Protobuf.
 
 `TrySend(chID, msgBytes)` is a nonblocking call that returns false if the
 channel's queue is full.
@@ -418,9 +419,11 @@ func (c *MConnection) CanSend(chID byte) bool {
 func (c *MConnection) sendRoutine() {
 	defer c._recover()
 
+	protoWriter := protoio.NewDelimitedWriter(c.bufConnWriter)
+
 FOR_LOOP:
 	for {
-		var _n int64
+		var _n int
 		var err error
 	SELECTION:
 		select {
@@ -434,11 +437,12 @@ FOR_LOOP:
 			}
 		case <-c.pingTimer.C:
 			c.Logger.Debug("Send Ping")
-			_n, err = cdc.MarshalBinaryLengthPrefixedWriter(c.bufConnWriter, PacketPing{})
+			_n, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPing{}))
 			if err != nil {
+				c.Logger.Error("Failed to send PacketPing", "err", err)
 				break SELECTION
 			}
-			c.sendMonitor.Update(int(_n))
+			c.sendMonitor.Update(_n)
 			c.Logger.Debug("Starting pong timer", "dur", c.config.PongTimeout)
 			c.pongTimer = time.AfterFunc(c.config.PongTimeout, func() {
 				select {
@@ -456,11 +460,12 @@ FOR_LOOP:
 			}
 		case <-c.pong:
 			c.Logger.Debug("Send Pong")
-			_n, err = cdc.MarshalBinaryLengthPrefixedWriter(c.bufConnWriter, PacketPong{})
+			_n, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
 			if err != nil {
+				c.Logger.Error("Failed to send PacketPong", "err", err)
 				break SELECTION
 			}
-			c.sendMonitor.Update(int(_n))
+			c.sendMonitor.Update(_n)
 			c.flush()
 		case <-c.quitSendRoutine:
 			break FOR_LOOP
@@ -540,7 +545,7 @@ func (c *MConnection) sendPacketMsg() bool {
 		c.stopForError(err)
 		return true
 	}
-	c.sendMonitor.Update(int(_n))
+	c.sendMonitor.Update(_n)
 	c.flushTimer.Set()
 	return false
 }
@@ -552,6 +557,8 @@ func (c *MConnection) sendPacketMsg() bool {
 func (c *MConnection) recvRoutine() {
 	defer c._recover()
 
+	protoReader := protoio.NewDelimitedReader(c.bufConnReader, c._maxPacketMsgSize)
+
 FOR_LOOP:
 	for {
 		// Block until .recvMonitor says we can read.
@@ -572,12 +579,9 @@ FOR_LOOP:
 		*/
 
 		// Read packet type
-		var packet Packet
-		var _n int64
-		var err error
-		_n, err = cdc.UnmarshalBinaryLengthPrefixedReader(c.bufConnReader, &packet, int64(c._maxPacketMsgSize))
-		c.recvMonitor.Update(int(_n))
+		var packet tmp2p.Packet
 
+		err := protoReader.ReadMsg(&packet)
 		if err != nil {
 			// stopServices was invoked and we are shutting down
 			// receiving is excpected to fail since we will close the connection
@@ -599,8 +603,8 @@ FOR_LOOP:
 		}
 
 		// Read more depending on packet type.
-		switch pkt := packet.(type) {
-		case PacketPing:
+		switch pkt := packet.Sum.(type) {
+		case *tmp2p.Packet_PacketPing:
 			// TODO: prevent abuse, as they cause flush()'s.
 			// https://github.com/tendermint/tendermint/issues/1190
 			c.Logger.Debug("Receive Ping")
@@ -609,23 +613,23 @@ FOR_LOOP:
 			default:
 				// never block
 			}
-		case PacketPong:
+		case *tmp2p.Packet_PacketPong:
 			c.Logger.Debug("Receive Pong")
 			select {
 			case c.pongTimeoutCh <- false:
 			default:
 				// never block
 			}
-		case PacketMsg:
-			channel, ok := c.channelsIdx[pkt.ChannelID]
+		case *tmp2p.Packet_PacketMsg:
+			channel, ok := c.channelsIdx[byte(pkt.PacketMsg.ChannelID)]
 			if !ok || channel == nil {
-				err := fmt.Errorf("unknown channel %X", pkt.ChannelID)
+				err := fmt.Errorf("unknown channel %X", pkt.PacketMsg.ChannelID)
 				c.Logger.Error("Connection failed @ recvRoutine", "conn", c, "err", err)
 				c.stopForError(err)
 				break FOR_LOOP
 			}
 
-			msgBytes, err := channel.recvPacketMsg(pkt)
+			msgBytes, err := channel.recvPacketMsg(*pkt.PacketMsg)
 			if err != nil {
 				if c.IsRunning() {
 					c.Logger.Error("Connection failed @ recvRoutine", "conn", c, "err", err)
@@ -634,9 +638,9 @@ FOR_LOOP:
 				break FOR_LOOP
 			}
 			if msgBytes != nil {
-				c.Logger.Debug("Received bytes", "chID", pkt.ChannelID, "msgBytes", fmt.Sprintf("%X", msgBytes))
+				c.Logger.Debug("Received bytes", "chID", pkt.PacketMsg.ChannelID, "msgBytes", fmt.Sprintf("%X", msgBytes))
 				// NOTE: This means the reactor.Receive runs in the same thread as the p2p recv routine
-				c.onReceive(pkt.ChannelID, msgBytes)
+				c.onReceive(byte(pkt.PacketMsg.ChannelID), msgBytes)
 			}
 		default:
 			err := fmt.Errorf("unknown message type %v", reflect.TypeOf(packet))
@@ -661,14 +665,17 @@ func (c *MConnection) stopPongTimer() {
 	}
 }
 
-// maxPacketMsgSize returns a maximum size of PacketMsg, including the overhead
-// of amino encoding.
+// maxPacketMsgSize returns a maximum size of PacketMsg
 func (c *MConnection) maxPacketMsgSize() int {
-	return len(cdc.MustMarshalBinaryLengthPrefixed(PacketMsg{
+	bz, err := proto.Marshal(mustWrapPacket(&tmp2p.PacketMsg{
 		ChannelID: 0x01,
 		EOF:       1,
-		Bytes:     make([]byte, c.config.MaxPacketMsgPayloadSize),
-	})) + 10 // leave room for changes in amino
+		Data:      make([]byte, c.config.MaxPacketMsgPayloadSize),
+	}))
+	if err != nil {
+		panic(err)
+	}
+	return len(bz)
 }
 
 type ConnectionStatus struct {
@@ -814,17 +821,16 @@ func (ch *Channel) isSendPending() bool {
 
 // Creates a new PacketMsg to send.
 // Not goroutine-safe
-func (ch *Channel) nextPacketMsg() PacketMsg {
-	packet := PacketMsg{}
-	packet.ChannelID = ch.desc.ID
+func (ch *Channel) nextPacketMsg() tmp2p.PacketMsg {
+	packet := tmp2p.PacketMsg{ChannelID: int32(ch.desc.ID)}
 	maxSize := ch.maxPacketMsgPayloadSize
-	packet.Bytes = ch.sending[:tmmath.MinInt(maxSize, len(ch.sending))]
+	packet.Data = ch.sending[:tmmath.MinInt(maxSize, len(ch.sending))]
 	if len(ch.sending) <= maxSize {
-		packet.EOF = byte(0x01)
+		packet.EOF = 0x01
 		ch.sending = nil
 		atomic.AddInt32(&ch.sendQueueSize, -1) // decrement sendQueueSize
 	} else {
-		packet.EOF = byte(0x00)
+		packet.EOF = 0x00
 		ch.sending = ch.sending[tmmath.MinInt(maxSize, len(ch.sending)):]
 	}
 	return packet
@@ -832,24 +838,24 @@ func (ch *Channel) nextPacketMsg() PacketMsg {
 
 // Writes next PacketMsg to w and updates c.recentlySent.
 // Not goroutine-safe
-func (ch *Channel) writePacketMsgTo(w io.Writer) (n int64, err error) {
-	var packet = ch.nextPacketMsg()
-	n, err = cdc.MarshalBinaryLengthPrefixedWriter(w, packet)
-	atomic.AddInt64(&ch.recentlySent, n)
+func (ch *Channel) writePacketMsgTo(w io.Writer) (n int, err error) {
+	packet := ch.nextPacketMsg()
+	n, err = protoio.NewDelimitedWriter(w).WriteMsg(mustWrapPacket(&packet))
+	atomic.AddInt64(&ch.recentlySent, int64(n))
 	return
 }
 
 // Handles incoming PacketMsgs. It returns a message bytes if message is
 // complete. NOTE message bytes may change on next call to recvPacketMsg.
 // Not goroutine-safe
-func (ch *Channel) recvPacketMsg(packet PacketMsg) ([]byte, error) {
+func (ch *Channel) recvPacketMsg(packet tmp2p.PacketMsg) ([]byte, error) {
 	ch.Logger.Debug("Read PacketMsg", "conn", ch.conn, "packet", packet)
-	var recvCap, recvReceived = ch.desc.RecvMessageCapacity, len(ch.recving) + len(packet.Bytes)
+	var recvCap, recvReceived = ch.desc.RecvMessageCapacity, len(ch.recving) + len(packet.Data)
 	if recvCap < recvReceived {
 		return nil, fmt.Errorf("received message exceeds available capacity: %v < %v", recvCap, recvReceived)
 	}
-	ch.recving = append(ch.recving, packet.Bytes...)
-	if packet.EOF == byte(0x01) {
+	ch.recving = append(ch.recving, packet.Data...)
+	if packet.EOF == 0x01 {
 		msgBytes := ch.recving
 
 		// clear the slice without re-allocating.
@@ -873,33 +879,34 @@ func (ch *Channel) updateStats() {
 //----------------------------------------
 // Packet
 
-type Packet interface {
-	AssertIsPacket()
-}
-
-func RegisterPacket(cdc *amino.Codec) {
-	cdc.RegisterInterface((*Packet)(nil), nil)
-	cdc.RegisterConcrete(PacketPing{}, "tendermint/p2p/PacketPing", nil)
-	cdc.RegisterConcrete(PacketPong{}, "tendermint/p2p/PacketPong", nil)
-	cdc.RegisterConcrete(PacketMsg{}, "tendermint/p2p/PacketMsg", nil)
-}
-
-func (PacketPing) AssertIsPacket() {}
-func (PacketPong) AssertIsPacket() {}
-func (PacketMsg) AssertIsPacket()  {}
-
-type PacketPing struct {
-}
-
-type PacketPong struct {
-}
-
-type PacketMsg struct {
-	ChannelID byte
-	EOF       byte // 1 means message ends here.
-	Bytes     []byte
-}
+// mustWrapPacket takes a packet kind (oneof) and wraps it in a tmp2p.Packet message.
+func mustWrapPacket(pb proto.Message) *tmp2p.Packet {
+	var msg tmp2p.Packet
+
+	switch pb := pb.(type) {
+	case *tmp2p.Packet: // already a packet
+		msg = *pb
+	case *tmp2p.PacketPing:
+		msg = tmp2p.Packet{
+			Sum: &tmp2p.Packet_PacketPing{
+				PacketPing: pb,
+			},
+		}
+	case *tmp2p.PacketPong:
+		msg = tmp2p.Packet{
+			Sum: &tmp2p.Packet_PacketPong{
+				PacketPong: pb,
+			},
+		}
+	case *tmp2p.PacketMsg:
+		msg = tmp2p.Packet{
+			Sum: &tmp2p.Packet_PacketMsg{
+				PacketMsg: pb,
+			},
+		}
+	default:
+		panic(fmt.Errorf("unknown packet type %T", pb))
+	}
 
-func (mp PacketMsg) String() string {
-	return fmt.Sprintf("PacketMsg{%X:%X T:%X}", mp.ChannelID, mp.Bytes, mp.EOF)
+	return &msg
 }

p2p/conn/connection_test.go

@@ -1,7 +1,6 @@
 package conn
 
 import (
-	"bytes"
 	"net"
 	"testing"
 	"time"
@@ -10,9 +9,10 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	amino "github.com/tendermint/go-amino"
-
 	"github.com/tendermint/tendermint/libs/log"
+	"github.com/tendermint/tendermint/libs/protoio"
+	tmp2p "github.com/tendermint/tendermint/proto/p2p"
+	"github.com/tendermint/tendermint/proto/types"
 )
 
 const maxPingPongPacketSize = 1024 // bytes
@@ -54,12 +54,12 @@ func TestMConnectionSendFlushStop(t *testing.T) {
 	msg := []byte("abc")
 	assert.True(t, clientConn.Send(0x01, msg))
 
-	aminoMsgLength := 14
+	msgLength := 14
 
 	// start the reader in a new routine, so we can flush
 	errCh := make(chan error)
 	go func() {
-		msgB := make([]byte, aminoMsgLength)
+		msgB := make([]byte, msgLength)
 		_, err := server.Read(msgB)
 		if err != nil {
 			t.Error(err)
@@ -182,9 +182,9 @@ func TestMConnectionPongTimeoutResultsInError(t *testing.T) {
 	serverGotPing := make(chan struct{})
 	go func() {
 		// read ping
-		var pkt PacketPing
-		_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-		assert.Nil(t, err)
+		var pkt tmp2p.Packet
+		err := protoio.NewDelimitedReader(server, maxPingPongPacketSize).ReadMsg(&pkt)
+		require.NoError(t, err)
 		serverGotPing <- struct{}{}
 	}()
 	<-serverGotPing
@@ -219,26 +219,28 @@ func TestMConnectionMultiplePongsInTheBeginning(t *testing.T) {
 	defer mconn.Stop()
 
 	// sending 3 pongs in a row (abuse)
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-	require.Nil(t, err)
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-	require.Nil(t, err)
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-	require.Nil(t, err)
+	protoWriter := protoio.NewDelimitedWriter(server)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+	require.NoError(t, err)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+	require.NoError(t, err)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+	require.NoError(t, err)
 
 	serverGotPing := make(chan struct{})
 	go func() {
 		// read ping (one byte)
-		var (
-			packet Packet
-			err    error
-		)
-		_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &packet, maxPingPongPacketSize)
-		require.Nil(t, err)
+		var packet tmp2p.Packet
+		err := protoio.NewDelimitedReader(server, maxPingPongPacketSize).ReadMsg(&packet)
+		require.NoError(t, err)
 		serverGotPing <- struct{}{}
+
 		// respond with pong
-		_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-		require.Nil(t, err)
+		_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+		require.NoError(t, err)
 	}()
 	<-serverGotPing
 
@@ -273,19 +275,27 @@ func TestMConnectionMultiplePings(t *testing.T) {
 
 	// sending 3 pings in a row (abuse)
 	// see https://github.com/tendermint/tendermint/issues/1190
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPing{}))
-	require.Nil(t, err)
-	var pkt PacketPong
-	_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-	require.Nil(t, err)
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPing{}))
-	require.Nil(t, err)
-	_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-	require.Nil(t, err)
-	_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPing{}))
-	require.Nil(t, err)
-	_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-	require.Nil(t, err)
+	protoReader := protoio.NewDelimitedReader(server, maxPingPongPacketSize)
+	protoWriter := protoio.NewDelimitedWriter(server)
+	var pkt tmp2p.Packet
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPing{}))
+	require.NoError(t, err)
+
+	err = protoReader.ReadMsg(&pkt)
+	require.NoError(t, err)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPing{}))
+	require.NoError(t, err)
+
+	err = protoReader.ReadMsg(&pkt)
+	require.NoError(t, err)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPing{}))
+	require.NoError(t, err)
+
+	err = protoReader.ReadMsg(&pkt)
+	require.NoError(t, err)
 
 	assert.True(t, mconn.IsRunning())
 }
@@ -314,25 +324,32 @@ func TestMConnectionPingPongs(t *testing.T) {
 
 	serverGotPing := make(chan struct{})
 	go func() {
+		protoReader := protoio.NewDelimitedReader(server, maxPingPongPacketSize)
+		protoWriter := protoio.NewDelimitedWriter(server)
+		var pkt tmp2p.PacketPing
+
 		// read ping
-		var pkt PacketPing
-		_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-		require.Nil(t, err)
+		err = protoReader.ReadMsg(&pkt)
+		require.NoError(t, err)
 		serverGotPing <- struct{}{}
+
 		// respond with pong
-		_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-		require.Nil(t, err)
+		_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+		require.NoError(t, err)
 
 		time.Sleep(mconn.config.PingInterval)
 
 		// read ping
-		_, err = cdc.UnmarshalBinaryLengthPrefixedReader(server, &pkt, maxPingPongPacketSize)
-		require.Nil(t, err)
+		err = protoReader.ReadMsg(&pkt)
+		require.NoError(t, err)
+		serverGotPing <- struct{}{}
+
 		// respond with pong
-		_, err = server.Write(cdc.MustMarshalBinaryLengthPrefixed(PacketPong{}))
-		require.Nil(t, err)
+		_, err = protoWriter.WriteMsg(mustWrapPacket(&tmp2p.PacketPong{}))
+		require.NoError(t, err)
 	}()
 	<-serverGotPing
+	<-serverGotPing
 
 	pongTimerExpired := (mconn.config.PongTimeout + 20*time.Millisecond) * 2
 	select {
@@ -425,13 +442,9 @@ func TestMConnectionReadErrorBadEncoding(t *testing.T) {
 
 	client := mconnClient.conn
 
-	// send badly encoded msgPacket
-	bz := cdc.MustMarshalBinaryLengthPrefixed(PacketMsg{})
-	bz[4] += 0x01 // Invalid prefix bytes.
-
 	// Write it.
-	_, err := client.Write(bz)
-	assert.Nil(t, err)
+	_, err := client.Write([]byte{1, 2, 3, 4, 5})
+	require.NoError(t, err)
 	assert.True(t, expectSend(chOnErr), "badly encoded msgPacket")
 }
 
@@ -465,32 +478,28 @@ func TestMConnectionReadErrorLongMessage(t *testing.T) {
 	}
 
 	client := mconnClient.conn
+	protoWriter := protoio.NewDelimitedWriter(client)
 
 	// send msg thats just right
-	var err error
-	var buf = new(bytes.Buffer)
-	var packet = PacketMsg{
+	var packet = tmp2p.PacketMsg{
 		ChannelID: 0x01,
 		EOF:       1,
-		Bytes:     make([]byte, mconnClient.config.MaxPacketMsgPayloadSize),
+		Data:      make([]byte, mconnClient.config.MaxPacketMsgPayloadSize),
 	}
-	_, err = cdc.MarshalBinaryLengthPrefixedWriter(buf, packet)
-	assert.Nil(t, err)
-	_, err = client.Write(buf.Bytes())
-	assert.Nil(t, err)
+
+	_, err := protoWriter.WriteMsg(mustWrapPacket(&packet))
+	require.NoError(t, err)
 	assert.True(t, expectSend(chOnRcv), "msg just right")
 
 	// send msg thats too long
-	buf = new(bytes.Buffer)
-	packet = PacketMsg{
+	packet = tmp2p.PacketMsg{
 		ChannelID: 0x01,
 		EOF:       1,
-		Bytes:     make([]byte, mconnClient.config.MaxPacketMsgPayloadSize+100),
+		Data:      make([]byte, mconnClient.config.MaxPacketMsgPayloadSize+100),
 	}
-	_, err = cdc.MarshalBinaryLengthPrefixedWriter(buf, packet)
-	assert.Nil(t, err)
-	_, err = client.Write(buf.Bytes())
-	assert.NotNil(t, err)
+
+	_, err = protoWriter.WriteMsg(mustWrapPacket(&packet))
+	require.Error(t, err)
 	assert.True(t, expectSend(chOnErr), "msg too long")
 }
 
@@ -501,10 +510,8 @@ func TestMConnectionReadErrorUnknownMsgType(t *testing.T) {
 	defer mconnServer.Stop()
 
 	// send msg with unknown msg type
-	err := amino.EncodeUvarint(mconnClient.conn, 4)
-	assert.Nil(t, err)
-	_, err = mconnClient.conn.Write([]byte{0xFF, 0xFF, 0xFF, 0xFF})
-	assert.Nil(t, err)
+	_, err := protoio.NewDelimitedWriter(mconnClient.conn).WriteMsg(&types.Header{ChainID: "x"})
+	require.NoError(t, err)
 	assert.True(t, expectSend(chOnErr), "unknown msg type")
 }
 

p2p/conn/evil_secret_connection_test.go

@@ -6,12 +6,16 @@ import (
 	"io"
 	"testing"
 
+	gogotypes "github.com/gogo/protobuf/types"
 	"github.com/gtank/merlin"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/crypto/chacha20poly1305"
 
 	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/crypto/ed25519"
+	cryptoenc "github.com/tendermint/tendermint/crypto/encoding"
+	"github.com/tendermint/tendermint/libs/protoio"
+	tmp2p "github.com/tendermint/tendermint/proto/p2p"
 )
 
 type buffer struct {
@@ -80,14 +84,15 @@ func (c *evilConn) Read(data []byte) (n int, err error) {
 	switch c.readStep {
 	case 0:
 		if !c.badEphKey {
-			bz, err := cdc.MarshalBinaryLengthPrefixed(c.locEphPub)
+			lc := *c.locEphPub
+			bz, err := protoio.MarshalDelimited(&gogotypes.BytesValue{Value: lc[:]})
 			if err != nil {
 				panic(err)
 			}
 			copy(data, bz[c.readOffset:])
 			n = len(data)
 		} else {
-			bz, err := cdc.MarshalBinaryLengthPrefixed([]byte("drop users;"))
+			bz, err := protoio.MarshalDelimited(&gogotypes.BytesValue{Value: []byte("drop users;")})
 			if err != nil {
 				panic(err)
 			}
@@ -108,7 +113,11 @@ func (c *evilConn) Read(data []byte) (n int, err error) {
 	case 1:
 		signature := c.signChallenge()
 		if !c.badAuthSignature {
-			bz, err := cdc.MarshalBinaryLengthPrefixed(authSigMessage{c.privKey.PubKey(), signature})
+			pkpb, err := cryptoenc.PubKeyToProto(c.privKey.PubKey())
+			if err != nil {
+				panic(err)
+			}
+			bz, err := protoio.MarshalDelimited(&tmp2p.AuthSigMessage{PubKey: pkpb, Sig: signature})
 			if err != nil {
 				panic(err)
 			}
@@ -121,7 +130,7 @@ func (c *evilConn) Read(data []byte) (n int, err error) {
 			}
 			copy(data, c.buffer.Bytes()[c.readOffset:])
 		} else {
-			bz, err := cdc.MarshalBinaryLengthPrefixed([]byte("select * from users;"))
+			bz, err := protoio.MarshalDelimited(&gogotypes.BytesValue{Value: []byte("select * from users;")})
 			if err != nil {
 				panic(err)
 			}
@@ -144,10 +153,16 @@ func (c *evilConn) Read(data []byte) (n int, err error) {
 func (c *evilConn) Write(data []byte) (n int, err error) {
 	switch c.writeStep {
 	case 0:
-		err := cdc.UnmarshalBinaryLengthPrefixed(data, c.remEphPub)
+		var (
+			bytes     gogotypes.BytesValue
+			remEphPub [32]byte
+		)
+		err := protoio.UnmarshalDelimited(data, &bytes)
 		if err != nil {
 			panic(err)
 		}
+		copy(remEphPub[:], bytes.Value)
+		c.remEphPub = &remEphPub
 		c.writeStep = 1
 		if !c.shareAuthSignature {
 			c.writeStep = 2
@@ -235,7 +250,7 @@ func TestMakeSecretConnection(t *testing.T) {
 		errMsg string
 	}{
 		{"refuse to share ethimeral key", newEvilConn(false, false, false, false), "EOF"},
-		{"share bad ethimeral key", newEvilConn(true, true, false, false), "Insufficient bytes to decode"},
+		{"share bad ethimeral key", newEvilConn(true, true, false, false), "wrong wireType"},
 		{"refuse to share auth signature", newEvilConn(true, false, false, false), "EOF"},
 		{"share bad auth signature", newEvilConn(true, false, true, true), "failed to decrypt SecretConnection"},
 		{"all good", newEvilConn(true, false, true, false), ""},

p2p/conn/secret_connection.go

@@ -14,6 +14,7 @@ import (
 	"sync"
 	"time"
 
+	gogotypes "github.com/gogo/protobuf/types"
 	"github.com/gtank/merlin"
 	pool "github.com/libp2p/go-buffer-pool"
 	"golang.org/x/crypto/chacha20poly1305"
@@ -23,7 +24,10 @@ import (
 
 	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/crypto/ed25519"
+	cryptoenc "github.com/tendermint/tendermint/crypto/encoding"
 	"github.com/tendermint/tendermint/libs/async"
+	"github.com/tendermint/tendermint/libs/protoio"
+	tmp2p "github.com/tendermint/tendermint/proto/p2p"
 )
 
 // 4 + 1024 == 1028 total frame size
@@ -250,7 +254,7 @@ func (sc *SecretConnection) Read(data []byte) (n int, err error) {
 	defer pool.Put(frame)
 	_, err = sc.recvAead.Open(frame[:0], sc.recvNonce[:], sealedFrame, nil)
 	if err != nil {
-		return n, errors.New("failed to decrypt SecretConnection")
+		return n, fmt.Errorf("failed to decrypt SecretConnection: %w", err)
 	}
 	incrNonce(sc.recvNonce)
 	// end decryption
@@ -300,18 +304,22 @@ func shareEphPubKey(conn io.ReadWriter, locEphPub *[32]byte) (remEphPub *[32]byt
 	// Send our pubkey and receive theirs in tandem.
 	var trs, _ = async.Parallel(
 		func(_ int) (val interface{}, abort bool, err error) {
-			var _, err1 = cdc.MarshalBinaryLengthPrefixedWriter(conn, locEphPub)
-			if err1 != nil {
-				return nil, true, err1 // abort
+			lc := *locEphPub
+			_, err = protoio.NewDelimitedWriter(conn).WriteMsg(&gogotypes.BytesValue{Value: lc[:]})
+			if err != nil {
+				return nil, true, err // abort
 			}
 			return nil, false, nil
 		},
 		func(_ int) (val interface{}, abort bool, err error) {
-			var _remEphPub [32]byte
-			var _, err2 = cdc.UnmarshalBinaryLengthPrefixedReader(conn, &_remEphPub, 1024*1024) // TODO
-			if err2 != nil {
-				return nil, true, err2 // abort
+			var bytes gogotypes.BytesValue
+			err = protoio.NewDelimitedReader(conn, 1024*1024).ReadMsg(&bytes)
+			if err != nil {
+				return nil, true, err // abort
 			}
+
+			var _remEphPub [32]byte
+			copy(_remEphPub[:], bytes.Value)
 			return _remEphPub, false, nil
 		},
 	)
@@ -399,17 +407,31 @@ func shareAuthSignature(sc io.ReadWriter, pubKey crypto.PubKey, signature []byte
 	// Send our info and receive theirs in tandem.
 	var trs, _ = async.Parallel(
 		func(_ int) (val interface{}, abort bool, err error) {
-			var _, err1 = cdc.MarshalBinaryLengthPrefixedWriter(sc, authSigMessage{pubKey, signature})
-			if err1 != nil {
-				return nil, true, err1 // abort
+			pbpk, err := cryptoenc.PubKeyToProto(pubKey)
+			if err != nil {
+				return nil, true, err
+			}
+			_, err = protoio.NewDelimitedWriter(sc).WriteMsg(&tmp2p.AuthSigMessage{PubKey: pbpk, Sig: signature})
+			if err != nil {
+				return nil, true, err // abort
 			}
 			return nil, false, nil
 		},
 		func(_ int) (val interface{}, abort bool, err error) {
-			var _recvMsg authSigMessage
-			var _, err2 = cdc.UnmarshalBinaryLengthPrefixedReader(sc, &_recvMsg, 1024*1024) // TODO
-			if err2 != nil {
-				return nil, true, err2 // abort
+			var pba tmp2p.AuthSigMessage
+			err = protoio.NewDelimitedReader(sc, 1024*1024).ReadMsg(&pba)
+			if err != nil {
+				return nil, true, err // abort
+			}
+
+			pk, err := cryptoenc.PubKeyFromProto(pba.PubKey)
+			if err != nil {
+				return nil, true, err // abort
+			}
+
+			_recvMsg := authSigMessage{
+				Key: pk,
+				Sig: pba.Sig,
 			}
 			return _recvMsg, false, nil
 		},

p2p/conn/secret_connection_test.go

@@ -257,38 +257,30 @@ func TestDeriveSecretsAndChallengeGolden(t *testing.T) {
 
 func TestNilPubkey(t *testing.T) {
 	var fooConn, barConn = makeKVStoreConnPair()
+	defer fooConn.Close()
+	defer barConn.Close()
 	var fooPrvKey = ed25519.GenPrivKey()
 	var barPrvKey = privKeyWithNilPubKey{ed25519.GenPrivKey()}
 
-	go func() {
-		_, err := MakeSecretConnection(barConn, barPrvKey)
-		assert.NoError(t, err)
-	}()
+	go MakeSecretConnection(fooConn, fooPrvKey)
 
-	assert.NotPanics(t, func() {
-		_, err := MakeSecretConnection(fooConn, fooPrvKey)
-		if assert.Error(t, err) {
-			assert.Equal(t, "expected ed25519 pubkey, got <nil>", err.Error())
-		}
-	})
+	_, err := MakeSecretConnection(barConn, barPrvKey)
+	require.Error(t, err)
+	assert.Equal(t, "toproto: key type <nil> is not supported", err.Error())
 }
 
 func TestNonEd25519Pubkey(t *testing.T) {
 	var fooConn, barConn = makeKVStoreConnPair()
+	defer fooConn.Close()
+	defer barConn.Close()
 	var fooPrvKey = ed25519.GenPrivKey()
 	var barPrvKey = secp256k1.GenPrivKey()
 
-	go func() {
-		_, err := MakeSecretConnection(barConn, barPrvKey)
-		assert.NoError(t, err)
-	}()
+	go MakeSecretConnection(fooConn, fooPrvKey)
 
-	assert.NotPanics(t, func() {
-		_, err := MakeSecretConnection(fooConn, fooPrvKey)
-		if assert.Error(t, err) {
-			assert.Equal(t, "expected ed25519 pubkey, got secp256k1.PubKey", err.Error())
-		}
-	})
+	_, err := MakeSecretConnection(barConn, barPrvKey)
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "is not supported")
 }
 
 func writeLots(t *testing.T, wg *sync.WaitGroup, conn io.Writer, txt string, n int) {

proto/p2p/conn_msgs.pb.go

@@ -7,6 +7,7 @@ import (
 	fmt "fmt"
 	_ "github.com/gogo/protobuf/gogoproto"
 	proto "github.com/gogo/protobuf/proto"
+	keys "github.com/tendermint/tendermint/proto/crypto/keys"
 	io "io"
 	math "math"
 	math_bits "math/bits"
@@ -253,38 +254,96 @@ func (*Packet) XXX_OneofWrappers() []interface{} {
 	}
 }
 
+type AuthSigMessage struct {
+	PubKey keys.PublicKey `protobuf:"bytes,1,opt,name=pub_key,json=pubKey,proto3" json:"pub_key"`
+	Sig    []byte         `protobuf:"bytes,2,opt,name=sig,proto3" json:"sig,omitempty"`
+}
+
+func (m *AuthSigMessage) Reset()         { *m = AuthSigMessage{} }
+func (m *AuthSigMessage) String() string { return proto.CompactTextString(m) }
+func (*AuthSigMessage) ProtoMessage()    {}
+func (*AuthSigMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_8c680f0b24d73fe7, []int{4}
+}
+func (m *AuthSigMessage) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *AuthSigMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_AuthSigMessage.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *AuthSigMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_AuthSigMessage.Merge(m, src)
+}
+func (m *AuthSigMessage) XXX_Size() int {
+	return m.Size()
+}
+func (m *AuthSigMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_AuthSigMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_AuthSigMessage proto.InternalMessageInfo
+
+func (m *AuthSigMessage) GetPubKey() keys.PublicKey {
+	if m != nil {
+		return m.PubKey
+	}
+	return keys.PublicKey{}
+}
+
+func (m *AuthSigMessage) GetSig() []byte {
+	if m != nil {
+		return m.Sig
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*PacketPing)(nil), "tendermint.proto.p2p.PacketPing")
 	proto.RegisterType((*PacketPong)(nil), "tendermint.proto.p2p.PacketPong")
 	proto.RegisterType((*PacketMsg)(nil), "tendermint.proto.p2p.PacketMsg")
 	proto.RegisterType((*Packet)(nil), "tendermint.proto.p2p.Packet")
+	proto.RegisterType((*AuthSigMessage)(nil), "tendermint.proto.p2p.AuthSigMessage")
 }
 
 func init() { proto.RegisterFile("proto/p2p/conn_msgs.proto", fileDescriptor_8c680f0b24d73fe7) }
 
 var fileDescriptor_8c680f0b24d73fe7 = []byte{
-	// 324 bytes of a gzipped FileDescriptorProto
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-	0x0b, 0x02, 0x00, 0x00,
+	// 409 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x84, 0x92, 0xdf, 0x6a, 0xd4, 0x40,
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+	0xff, 0xd2, 0xaa, 0xb3, 0xc0, 0x96, 0x02, 0x00, 0x00,
 }
 
 func (m *PacketPing) Marshal() (dAtA []byte, err error) {
@@ -468,6 +527,46 @@ func (m *Packet_PacketMsg) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	}
 	return len(dAtA) - i, nil
 }
+func (m *AuthSigMessage) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *AuthSigMessage) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *AuthSigMessage) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.Sig) > 0 {
+		i -= len(m.Sig)
+		copy(dAtA[i:], m.Sig)
+		i = encodeVarintConnMsgs(dAtA, i, uint64(len(m.Sig)))
+		i--
+		dAtA[i] = 0x12
+	}
+	{
+		size, err := m.PubKey.MarshalToSizedBuffer(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarintConnMsgs(dAtA, i, uint64(size))
+	}
+	i--
+	dAtA[i] = 0xa
+	return len(dAtA) - i, nil
+}
+
 func encodeVarintConnMsgs(dAtA []byte, offset int, v uint64) int {
 	offset -= sovConnMsgs(v)
 	base := offset
@@ -564,6 +663,20 @@ func (m *Packet_PacketMsg) Size() (n int) {
 	}
 	return n
 }
+func (m *AuthSigMessage) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = m.PubKey.Size()
+	n += 1 + l + sovConnMsgs(uint64(l))
+	l = len(m.Sig)
+	if l > 0 {
+		n += 1 + l + sovConnMsgs(uint64(l))
+	}
+	return n
+}
 
 func sovConnMsgs(x uint64) (n int) {
 	return (math_bits.Len64(x|1) + 6) / 7
@@ -960,6 +1073,126 @@ func (m *Packet) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *AuthSigMessage) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowConnMsgs
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: AuthSigMessage: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: AuthSigMessage: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field PubKey", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowConnMsgs
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if err := m.PubKey.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Sig", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowConnMsgs
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Sig = append(m.Sig[:0], dAtA[iNdEx:postIndex]...)
+			if m.Sig == nil {
+				m.Sig = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipConnMsgs(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthConnMsgs
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipConnMsgs(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0

proto/p2p/conn_msgs.proto

@@ -4,6 +4,7 @@ package tendermint.proto.p2p;
 option go_package = "github.com/tendermint/tendermint/proto/p2p";
 
 import "third_party/proto/gogoproto/gogo.proto";
+import "proto/crypto/keys/types.proto";
 
 message PacketPing {}
 
@@ -22,3 +23,8 @@ message Packet {
     PacketMsg  packet_msg  = 3;
   }
 }
+
+message AuthSigMessage {
+  tendermint.proto.crypto.keys.PublicKey pub_key = 1 [(gogoproto.nullable) = false];
+  bytes                                  sig     = 2;
+}