LAUNCHCC3235MOD: Message Protocol code for simple message on a socket

Part Number: LAUNCHCC3235MOD
Other Parts Discussed in Thread: CC3235SF

First, I think such code might benefit many more than me. I was looking at tcpWorker in tcpecho_CC3235SF_LAUNCHXL_tirtos7_ticlang, and I hoped to use that as a starting point to transmit a messge of constant length like a character. And I hoped to put in an interpret and respond to the message before response. But so far I cannot get the reply of a toupper the msg. I was using a .net framework netstream (can read, can write) to send a message to the LAUNCHCC3235MOD and adaptation of tcpWorker.  

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void tcpWorker1(uint32_t arg0, uint32_t arg1)
{
    int idbg=0;
    int  iclientfd= (int)arg0;
    int  ibytesRcvd=0;
    int  ibytesMSG=0;
    int  ibytesSent=0;
    char cbuf[TCPPACKETSIZE];
    int bdone=-1;
    //Display_printf(display, 0, 0, "tcpWorker: start clientfd = 0x%x\n", clientfd);
    while (bdone!=1){
        while ((ibytesRcvd < recv(iclientfd, cbuf +ibytesMSG, MSGSZ, 0)) > 0) {
            ibytesMSG+=ibytesRcvd;
            idbg=ibytesMSG;
            if(ibytesMSG >= MSGSZ){
                ibytesMSG=0;
                break;
            }
        }
        //   process buffer compose response
        if (cbuf[4]==7) for (int i=MSGDG;i<MSGSZ;i++) cbuf[i]=(char)toupper(cbuf[i]);
        if (cbuf[0]==0x80) bdone=1;
        ibytesSent=0;int ibytesx=0;
        while (ibytesSent<(MSGSZ)){
            ibytesx=send(iclientfd, cbuf, MSGSZ, 0);
            if (ibytesx<0){
               ibytesx=0;
            }
             ibytesx=send(iclientfd, cbuf, MSGSZ, 0);
             ibytesSent +=ibytesx;


        }
    }
    close(iclientfd);
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using  System.IO;
using System.Net;
using System.Runtime.CompilerServices;

namespace csMSG
{

    internal class Program
    {
        const int TCPPACKETSIZE = 0x500;
        const int MSGSZ = 0x4e0;
        const int MSGDG = 0x20;
        const int MSGDD = 0x4c0;
        static void Main(string[] args)
        {
            String server = "trog3235";  // Server name or IP address
            byte[] aBMSGRcvd = new byte[MSGSZ];
            byte[] aBMSG = new byte[MSGSZ];
            for (int i = 0; i < MSGSZ; i++) aBMSG[i] = 0;
            int servPort = 58800;
            TcpClient client = null;
            NetworkStream netStream = null;
            StreamReader sr = new StreamReader("MSG1.txt");
            String smsg1 = sr.ReadToEnd();
            byte[] aBMSGDD = Encoding.ASCII.GetBytes(smsg1);
            Array.Resize(ref aBMSGDD, MSGDD);
            byte[] aBMSGDG = new byte[MSGDG];
            for (int i = 0; i < MSGDG; i++) aBMSGDG[i] = 0;
            aBMSGDG[0] = 0x80; aBMSGDG[4] = 7;
            aBMSG[0] = aBMSGDG[0]; aBMSG[4] = aBMSGDG[4];
            for (int i = 0; i < MSGDD; i++) aBMSG[MSGDG + i] = aBMSGDD[i];
            try
            {
                // Create socket that is connected to server on specified port
                client = new TcpClient(server, servPort);
                Console.WriteLine("Connected to server... sending message");
                netStream = client.GetStream();

                // Send the message to server
                netStream.Write(aBMSG, 0, aBMSG.Length);

                Console.WriteLine("Sent {0} bytes to server...", aBMSG.Length);
                //
                int totalBytesRcvd = 0;   // Total bytes received so far
                int bytesRcvd = 0;        // Bytes received in last read

                // Receive the same string back from the server
                int ix = 0;
                while (totalBytesRcvd < aBMSGRcvd.Length)
                {
                    bytesRcvd = netStream.Read(aBMSGRcvd, totalBytesRcvd, aBMSGRcvd.Length - totalBytesRcvd);
                    if (bytesRcvd < 0) bytesRcvd = 0;
                    Thread.Sleep(40);
                    totalBytesRcvd += bytesRcvd;
                    ix++;
                    if (ix > 20) break;

                }

                Console.WriteLine("Received {0} bytes from server: {1}", totalBytesRcvd,
                                  Encoding.ASCII.GetString(aBMSGRcvd, MSGDG, totalBytesRcvd));

            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                netStream.Close();
                if (client.Connected) client.Close();
                Console.WriteLine("Client ... connection closed");

            }
        }
    }
    
}