优化增加TcpService的包长度字段配置

network/tcp_msg.go

@@ -4,6 +4,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
+	"math"
 )
 
 // --------------
@@ -19,18 +20,21 @@ type MsgParser struct {
 }
 
 
+func (p *MsgParser) getMaxMsgLen(lenMsgLen int) uint32 {
+	switch p.LenMsgLen {
+	case 1:
+		return math.MaxUint8
+	case 2:
+		return math.MaxUint16
+	case 4:
+		return math.MaxUint32
+	default:
+		panic("LenMsgLen value must be 1 or 2 or 4")
+	}
+}
+
 func (p *MsgParser) init(){
 	p.INetMempool = NewMemAreaPool()
-
-	for i:=1;i<=4;i*=2 {
-		max := uint32(1<<(i*8)-1)
-		if p.MaxMsgLen <= max  {
-			p.LenMsgLen = i
-			return
-		}
-	}
-
-	panic("MaxMsgLen value must be less than 4294967295")
 }
 
 // goroutine safe