Sending message header as 4 bytes that represent size

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I have small c# server

C#

while (clientSocket.Connected)
            {
                byte[] streamBuffer = new byte[4];
                int streamLenght = this.clientStream.Read(streamBuffer, 0, 4);
                if (streamLenght == 0) break;
                int sizeofnewdata = BitConverter.ToInt32(streamBuffer, 0);
                streamBuffer = new byte[sizeofnewdata];
                streamLenght = this.clientStream.Read(streamBuffer, 0, sizeofnewdata);
                if (streamLenght == 0) break;
            }

Idea is to use first 4 bytes as an size header for new data that will arrive.
Problem is, client is being written in C++.

What would be easiest way to send first just 4 bytes using send() in c++ so I can decode them via BitConverter.ToInt32 in C#?

EDIT:
Question is how to convent sizeof() to unsigned char and then send that unsigned char over socket so i can decode it as Int32

Also, client is not using .NET framework.

Thank you in advance
Filip

Posted 2-Nov-10 0:43am

newzion

Updated 2-Nov-10 1:25am

v4

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CPallini · Accepted Answer · 2010-11-02T01:06:00

Solution 1

newzion wrote:
What would be easiest way to send first just 4 bytes using send() in c++

Using the send[^] function, of course.
:)

Posted 2-Nov-10 1:06am

CPallini

Comments

newzion 2-Nov-10 7:23am

Haha, now I get I didn't ask what I really wanted. Question is how to convent sizeof() to unsigned char and then send that unsigned char over socket

CPallini 2-Nov-10 7:57am

If you need to send an 'Int32' compatible tipe, just use it, for instance:
__int32 data_size = sizeof(may_data);
send( mysocket, &data_size, (int) sizeof(data_size), 0);

«_Superman_» 2-Nov-10 13:52pm

You could simply put 4 instead of using sizeof and then typecasting it.