diff --git a/handshake.go b/handshake.go
index b7645ef..31911b3 100644
--- a/handshake.go
+++ b/handshake.go
@@ -106,6 +106,7 @@ func parseChal(b []byte, peerKey []byte, key []byte) (dig []byte, err int) {
 	ver := b[5:9]
 	l.Printf("handshake:   epoch %v ver %v", epoch, ver)
 
+	// random
 	var offs int
 	if offs = findDigest(b[1:], peerKey, 772); offs == -1 {
 		if offs = findDigest(b[1:], peerKey, 8); offs == -1 {
@@ -123,7 +124,7 @@ func parseChal(b []byte, peerKey []byte, key []byte) (dig []byte, err int) {
 
 
 func handShake(rw io.ReadWriter) {
-	b := ReadBuf(rw, 1537)
+	b := ReadBuf(rw, 1537) // C0+C1
 	l.Printf("handshake: got client chal")
 	dig, err := parseChal(b, clientKey2, serverKey)
 	if err != 0 {
@@ -132,14 +133,14 @@ func handShake(rw io.ReadWriter) {
 
 	createChal(b, serverVersion, serverKey2)
 	l.Printf("handshake: send server chal")
-	rw.Write(b)
+	rw.Write(b) // S0+S1
 
 	b = make([]byte, 1536)
 	createResp(b, dig)
 	l.Printf("handshake: send server resp")
-	rw.Write(b)
+	rw.Write(b) // S2
 
-	b = ReadBuf(rw, 1536)
+	b = ReadBuf(rw, 1536) // C2
 	l.Printf("handshake: got client resp")
 }
 
diff --git a/new.go b/new.go
index fcabf2e..af634eb 100644
--- a/new.go
+++ b/new.go
@@ -8,6 +8,7 @@ import (
 	"encoding/hex"
 	"io"
 	"github.com/nareix/pio"
+	"github.com/nareix/flv/flvio"
 )
 
 type Publisher struct {
@@ -23,16 +24,10 @@ type Server struct {
 }
 
 func (self *Server) handleConn(conn *Conn) (err error) {
-	if err = conn.Handshake(); err != nil {
+	if err = conn.determineType(); err != nil {
+		fmt.Println("rtmp: conn closed:", err)
 		return
 	}
-
-	for {
-		if err = conn.ReadChunk(); err != nil {
-			return
-		}
-	}
-
 	return
 }
 
@@ -58,13 +53,7 @@ func (self *Server) ListenAndServe() (err error) {
 			return
 		}
 
-		conn := &Conn{}
-		conn.csmap = make(map[uint32]*chunkStream)
-		conn.maxChunkSize = 128
-		conn.bufr = bufio.NewReaderSize(netconn, 512)
-		conn.bufw = bufio.NewWriterSize(netconn, 512)
-		conn.br = pio.NewReader(conn.bufr)
-		conn.bw = pio.NewWriter(conn.bufw)
+		conn := newConn(netconn)
 		go self.handleConn(conn)
 	}
 }
@@ -74,32 +63,271 @@ type Conn struct {
 	bw *pio.Writer
 	bufr *bufio.Reader
 	bufw *bufio.Writer
+	intw *pio.Writer
 
-	maxChunkSize int
+	writeMaxChunkSize int
+	readMaxChunkSize int
 
 	lastcsid uint32
 	lastcs *chunkStream
 	csmap map[uint32]*chunkStream
+
+	publishing, playing bool
+
+	gotcommand bool
+	command string
+	commandr *pio.Reader
+	commandobj flvio.AMFMap
+	commandtransid float64
+
+	gotmsg bool
+	msgdata []byte
+	msgtypeid uint8
+}
+
+func newConn(netconn net.Conn) *Conn {
+	conn := &Conn{}
+	conn.csmap = make(map[uint32]*chunkStream)
+	conn.readMaxChunkSize = 128
+	conn.writeMaxChunkSize = 128
+	conn.bufr = bufio.NewReaderSize(netconn, 512)
+	conn.bufw = bufio.NewWriterSize(netconn, 512)
+	conn.br = pio.NewReader(conn.bufr)
+	conn.bw = pio.NewWriter(conn.bufw)
+	conn.intw = pio.NewWriter(nil)
+	return conn
 }
 
 type chunkStream struct {
-	TimestampNow uint32
-	TimestampDelta uint32
-	HasTimestampExt bool
-	Msgsid uint32
-	Msgtypeid uint8
-	Msglen uint32
-	Msgleft uint32
-	Msghdrtype uint8
-	Msgdata []byte
+	timenow uint32
+	timedelta uint32
+	hastimeext bool
+	msgsid uint32
+	msgtypeid uint8
+	msgdatalen uint32
+	msgdataleft uint32
+	msghdrtype uint8
+	msgdata []byte
 }
 
 func (self *chunkStream) Start() {
-	self.Msgleft = self.Msglen
-	self.Msgdata = make([]byte, self.Msglen)
+	self.msgdataleft = self.msgdatalen
+	self.msgdata = make([]byte, self.msgdatalen)
 }
 
-func (self *Conn) ReadChunk() ( err error) {
+const (
+	msgtypeidUserControl = 4
+	msgtypeidWindowAckSize = 5
+	msgtypeidSetPeerBandwidth = 6
+	msgtypeidSetChunkSize = 1
+	msgtypeidCommandMsgAMF0 = 20
+	msgtypeidCommandMsgAMF3 = 17
+)
+
+const (
+	eventtypeStreamBegin = 0
+)
+
+func (self *Conn) pollCommand() (err error) {
+	for {
+		if err = self.readChunk(); err != nil {
+			return
+		}
+		if self.gotcommand {
+			self.gotcommand = false
+			return
+		}
+	}
+}
+
+func (self *Conn) pollMsg() (err error) {
+	for {
+		if err = self.readChunk(); err != nil {
+			return
+		}
+		if self.gotmsg {
+			self.gotmsg = false
+			return
+		}
+	}
+}
+
+func (self *Conn) determineType() (err error) {
+	if err = self.handshake(); err != nil {
+		return
+	}
+
+	// < connect
+	if err = self.pollCommand(); err != nil {
+		return
+	}
+	if self.command != "connect" {
+		err = fmt.Errorf("rtmp: first command is not connect")
+		return
+	}
+
+	// > WindowAckSize
+	if err = self.writeWindowAckSize(5000000); err != nil {
+		return
+	}
+	// > SetPeerBandwidth
+	if err = self.writeSetPeerBandwidth(5000000, 2); err != nil {
+		return
+	}
+	// > SetChunkSize
+	if err = self.writeSetChunkSize(uint32(self.writeMaxChunkSize)); err != nil {
+		return
+	}
+
+	// > _result("NetConnection.Connect.Success")
+	w := self.writeCommandMsgStart()
+	flvio.WriteAMF0Val(w, "_result")
+	flvio.WriteAMF0Val(w, self.commandtransid)
+	flvio.WriteAMF0Val(w, flvio.AMFMap{
+		"fmtVer": "FMS/3,0,1,123",
+		"capabilities": 31,
+	})
+	flvio.WriteAMF0Val(w, flvio.AMFMap{
+		"level": "status",
+		"code": "NetConnection.Connect.Success",
+		"description": "Connection Success.",
+		"objectEncoding": 0,
+	})
+	self.writeCommandMsgEnd()
+
+	if err = self.pollCommand(); err != nil {
+		return
+	}
+	if err = self.pollCommand(); err != nil {
+		return
+	}
+
+	return
+}
+
+func (self *Conn) writeSetChunkSize(size uint32) (err error) {
+	w := self.writeProtoCtrlMsgStart()
+	w.WriteU32BE(size)
+	return self.writeProtoCtrlMsgEnd(msgtypeidSetChunkSize)
+}
+
+func (self *Conn) writeWindowAckSize(size uint32) (err error) {
+	w := self.writeProtoCtrlMsgStart()
+	w.WriteU32BE(size)
+	return self.writeProtoCtrlMsgEnd(msgtypeidWindowAckSize)
+}
+
+func (self *Conn) writeSetPeerBandwidth(acksize uint32, limittype uint8) (err error) {
+	w := self.writeProtoCtrlMsgStart()
+	w.WriteU32BE(acksize)
+	w.WriteU8(limittype)
+	return self.writeProtoCtrlMsgEnd(msgtypeidSetPeerBandwidth)
+}
+
+func (self *Conn) writeProtoCtrlMsgStart() *pio.Writer {
+	self.intw.SaveToVecOn()
+	return self.intw
+}
+
+func (self *Conn) writeProtoCtrlMsgEnd(msgtypeid uint8) (err error) {
+	msgdatav := self.intw.SaveToVecOff()
+	return self.writeChunks(2, 0, msgtypeid, 0, msgdatav)
+}
+
+func (self *Conn) writeCommandMsgStart() *pio.Writer {
+	self.intw.SaveToVecOn()
+	return self.intw
+}
+
+func (self *Conn) writeCommandMsgEnd() (err error) {
+	msgdatav := self.intw.SaveToVecOff()
+	return self.writeChunks(3, 0, msgtypeidCommandMsgAMF0, 0, msgdatav)
+}
+
+func (self *Conn) writeUserControlMsgStart(eventtype uint16) *pio.Writer {
+	self.intw.SaveToVecOn()
+	self.intw.WriteU16BE(eventtype)
+	return self.intw
+}
+
+func (self *Conn) writeUserControlMsgEnd() (err error) {
+	msgdatav := self.intw.SaveToVecOff()
+	return self.writeChunks(2, 0, msgtypeidUserControl, 0, msgdatav)
+}
+
+func (self *Conn) writeStreamBegin(msgcsid uint32) (err error) {
+	w := self.writeUserControlMsgStart(eventtypeStreamBegin)
+	w.WriteU32BE(msgcsid)
+	return self.writeUserControlMsgEnd()
+}
+
+func (self *Conn) writeChunks(csid uint32, timestamp uint32, msgtypeid uint8, msgcsid uint32, msgdatav [][]byte) (err error) {
+	msgdatalen := pio.VecLen(msgdatav)
+
+	// [Type 0][Type 3][Type 3][Type 3]
+
+	//  0                   1                   2                   3
+	//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	// |                   timestamp                   |message length |
+	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	// |     message length (cont)     |message type id| msg stream id |
+	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	// |           message stream id (cont)            |
+	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	//
+	//       Figure 9 Chunk Message Header – Type 0
+	if err = self.bw.WriteU8(byte(csid)&0x3f); err != nil {
+		return
+	}
+	if err = self.bw.WriteU24BE(timestamp); err != nil {
+		return
+	}
+	if err = self.bw.WriteU24BE(uint32(msgdatalen)); err != nil {
+		return
+	}
+	if err = self.bw.WriteU8(msgtypeid); err != nil {
+		return
+	}
+	if err = self.bw.WriteU32BE(msgcsid); err != nil {
+		return
+	}
+
+	msgdataoff := 0
+	for {
+		size := msgdatalen - msgdataoff
+		if size > self.writeMaxChunkSize {
+			size = self.writeMaxChunkSize
+		}
+
+		write := pio.VecSlice(msgdatav, msgdataoff, msgdataoff+size)
+		for _, b := range write {
+			if _, err = self.bw.Write(b); err != nil {
+				return
+			}
+		}
+
+		msgdataoff += size
+		if msgdataoff == msgdatalen {
+			break
+		}
+
+		// Type 3
+		if err = self.bw.WriteU8(byte(csid)&0x3f|3<<6); err != nil {
+			return
+		}
+	}
+
+	fmt.Printf("rtmp: write chunk msgdatalen=%d\n", msgdatalen)
+
+	if err = self.bufw.Flush(); err != nil {
+		return
+	}
+
+	return
+}
+
+func (self *Conn) readChunk() (err error) {
 	var msghdrtype uint8
 	var csid uint32
 	var header uint8
@@ -150,8 +378,8 @@ func (self *Conn) ReadChunk() ( err error) {
 		// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 		//
 		//       Figure 9 Chunk Message Header – Type 0
-		if cs.Msgleft != 0 {
-			err = fmt.Errorf("rtmp: chunk msgleft=%d invalid", cs.Msgleft)
+		if cs.msgdataleft != 0 {
+			err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
 			return
 		}
 		var h[]byte
@@ -159,19 +387,19 @@ func (self *Conn) ReadChunk() ( err error) {
 			return
 		}
 		timestamp = pio.GetU24BE(h[0:3])
-		cs.Msghdrtype = msghdrtype
-		cs.Msglen = pio.GetU24BE(h[3:6])
-		cs.Msgtypeid = h[6]
-		cs.Msgsid = pio.GetU32BE(h[7:11])
+		cs.msghdrtype = msghdrtype
+		cs.msgdatalen = pio.GetU24BE(h[3:6])
+		cs.msgtypeid = h[6]
+		cs.msgsid = pio.GetU32BE(h[7:11])
 		if timestamp == 0xffffff {
 			if timestamp, err = self.br.ReadU32BE(); err != nil {
 				return
 			}
-			cs.HasTimestampExt = true
+			cs.hastimeext = true
 		} else {
-			cs.HasTimestampExt = false
+			cs.hastimeext = false
 		}
-		cs.TimestampNow = timestamp
+		cs.timenow = timestamp
 		cs.Start()
 
 	case 1:
@@ -184,8 +412,8 @@ func (self *Conn) ReadChunk() ( err error) {
 		// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 		//
 		//       Figure 10 Chunk Message Header – Type 1
-		if cs.Msgleft != 0 {
-			err = fmt.Errorf("rtmp: chunk msgleft=%d invalid", cs.Msgleft)
+		if cs.msgdataleft != 0 {
+			err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
 			return
 		}
 		var h[]byte
@@ -193,19 +421,19 @@ func (self *Conn) ReadChunk() ( err error) {
 			return
 		}
 		timestamp = pio.GetU24BE(h[0:3])
-		cs.Msghdrtype = msghdrtype
-		cs.Msglen = pio.GetU24BE(h[3:6])
-		cs.Msgtypeid = h[6]
+		cs.msghdrtype = msghdrtype
+		cs.msgdatalen = pio.GetU24BE(h[3:6])
+		cs.msgtypeid = h[6]
 		if timestamp == 0xffffff {
 			if timestamp, err = self.br.ReadU32BE(); err != nil {
 				return
 			}
-			cs.HasTimestampExt = true
+			cs.hastimeext = true
 		} else {
-			cs.HasTimestampExt = false
+			cs.hastimeext = false
 		}
-		cs.TimestampDelta = timestamp
-		cs.TimestampNow += timestamp
+		cs.timedelta = timestamp
+		cs.timenow += timestamp
 		cs.Start()
 
 	case 2:
@@ -216,47 +444,47 @@ func (self *Conn) ReadChunk() ( err error) {
 		// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 		//
 		//       Figure 11 Chunk Message Header – Type 2
-		if cs.Msgleft != 0 {
-			err = fmt.Errorf("rtmp: chunk msgleft=%d invalid", cs.Msgleft)
+		if cs.msgdataleft != 0 {
+			err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
 			return
 		}
 		var h[]byte
 		if h, err = self.br.ReadBytes(3); err != nil {
 			return
 		}
-		cs.Msghdrtype = msghdrtype
+		cs.msghdrtype = msghdrtype
 		timestamp = pio.GetU24BE(h[0:3])
 		if timestamp == 0xffffff {
 			if timestamp, err = self.br.ReadU32BE(); err != nil {
 				return
 			}
-			cs.HasTimestampExt = true
+			cs.hastimeext = true
 		} else {
-			cs.HasTimestampExt = false
+			cs.hastimeext = false
 		}
-		cs.TimestampDelta = timestamp
-		cs.TimestampNow += timestamp
+		cs.timedelta = timestamp
+		cs.timenow += timestamp
 		cs.Start()
 
 	case 3:
-		if cs.Msgleft == 0 {
-			switch cs.Msghdrtype {
+		if cs.msgdataleft == 0 {
+			switch cs.msghdrtype {
 			case 0:
-				if cs.HasTimestampExt {
+				if cs.hastimeext {
 					if timestamp, err = self.br.ReadU32BE(); err != nil {
 						return
 					}
-					cs.TimestampNow = timestamp
+					cs.timenow = timestamp
 				}
 			case 1, 2:
-				if cs.HasTimestampExt {
+				if cs.hastimeext {
 					if timestamp, err = self.br.ReadU32BE(); err != nil {
 						return
 					}
 				} else {
-					timestamp = cs.TimestampDelta
+					timestamp = cs.timedelta
 				}
-				cs.TimestampNow += timestamp
+				cs.timenow += timestamp
 			}
 			cs.Start()
 		}
@@ -266,36 +494,75 @@ func (self *Conn) ReadChunk() ( err error) {
 		return
 	}
 
-	size := int(cs.Msgleft)
-	if size > self.maxChunkSize {
-		size = self.maxChunkSize
+	size := int(cs.msgdataleft)
+	if size > self.readMaxChunkSize {
+		size = self.readMaxChunkSize
 	}
-	off := cs.Msglen-cs.Msgleft
-	buf := cs.Msgdata[off:int(off)+size]
+	off := cs.msgdatalen-cs.msgdataleft
+	buf := cs.msgdata[off:int(off)+size]
 	if _, err = io.ReadFull(self.br, buf); err != nil {
 		return
 	}
-	cs.Msgleft -= uint32(size)
+	cs.msgdataleft -= uint32(size)
 
 	if true {
 		fmt.Printf("rtmp: chunk csid=%d msgsid=%d msgtypeid=%d msghdrtype=%d len=%d left=%d\n",
-			csid, cs.Msgsid, cs.Msgtypeid, cs.Msghdrtype, cs.Msglen, cs.Msgleft)
+			csid, cs.msgsid, cs.msgtypeid, cs.msghdrtype, cs.msgdatalen, cs.msgdataleft)
 	}
 
-	if cs.Msgleft == 0 {
+	if cs.msgdataleft == 0 {
 		if true {
 			fmt.Println("rtmp: chunk data")
-			fmt.Print(hex.Dump(cs.Msgdata))
-			fmt.Printf("%x\n", cs.Msgdata)
+			fmt.Print(hex.Dump(cs.msgdata))
+			fmt.Printf("%x\n", cs.msgdata)
+		}
+
+		if err = self.handleMsg(cs.msgtypeid, cs.msgdata); err != nil {
+			return
 		}
 	}
 
 	return
 }
 
-func (self *Conn) Handshake() (err error) {
-	// C0
+func (self *Conn) handleMsg(msgtypeid uint8, msgdata []byte) (err error) {
+	switch msgtypeid {
+	case msgtypeidCommandMsgAMF0:
+		r := pio.NewReaderBytes(msgdata)
+
+		command, _ := flvio.ReadAMF0Val(r)
+		commandtransid, _ := flvio.ReadAMF0Val(r)
+		commandobj, _ := flvio.ReadAMF0Val(r)
+
+		var ok bool
+		if self.command, ok = command.(string); !ok {
+			err = fmt.Errorf("rtmp: CommandMsgAMF0 command is not string")
+			return
+		}
+
+		self.commandobj, _ = commandobj.(flvio.AMFMap)
+		self.commandtransid, _ = commandtransid.(float64)
+
+		self.commandr = r
+		self.gotcommand = true
+
+	case msgtypeidSetPeerBandwidth:
+	case msgtypeidSetChunkSize:
+	case msgtypeidWindowAckSize:
+		self.msgdata = msgdata
+		self.msgtypeid = msgtypeid
+		self.gotmsg = true
+	}
+
+	return
+}
+
+func (self *Conn) handshake() (err error) {
+	var time uint32
 	var version uint8
+	random := make([]byte, 1528)
+
+	// C0
 	if version, err = self.br.ReadU8(); err != nil {
 		return
 	}
@@ -303,14 +570,21 @@ func (self *Conn) Handshake() (err error) {
 		err = fmt.Errorf("rtmp: handshake c0: version=%d invalid", version)
 		return
 	}
+	// C1
+	if time, err = self.br.ReadU32BE(); err != nil {
+		return
+	}
+	if _, err = self.br.ReadU32BE(); err != nil {
+		return
+	}
+	if _, err = io.ReadFull(self.br, random); err != nil {
+		return
+	}
 
 	// S0
 	if err = self.bw.WriteU8(0x3); err != nil {
 		return
 	}
-
-	random := make([]byte, 1528)
-
 	// S1
 	if err = self.bw.WriteU32BE(0); err != nil {
 		return
@@ -324,19 +598,6 @@ func (self *Conn) Handshake() (err error) {
 	if err = self.bufw.Flush(); err != nil {
 		return
 	}
-
-	// C1
-	var time uint32
-	if time, err = self.br.ReadU32BE(); err != nil {
-		return
-	}
-	if _, err = self.br.ReadU32BE(); err != nil {
-		return
-	}
-	if _, err = io.ReadFull(self.br, random); err != nil {
-		return
-	}
-
 	// S2
 	if err = self.bw.WriteU32BE(0); err != nil {
 		return