Folks,

I'm doing that just about everyday in Perl and it's downright easy. But what about C++ ?

The goal is to 'prepare' a buffer ready to be transmitted over TCP. For instance the buffer can have (in the right big-endian network format) :

- a command code (WORD)
- the length of the following string (LONG)
- the ASCII string, non-null terminated

In Perl we simply do:

my $test = pack("vVv", $command, $strLength, $string);

The 'v' being a word in big-endian network format, while the 'V' is a long in same format.

You get the idea.

How is it done in C/C++ ?

Thanks !

Well what i have understood is that you want to make a buffer to transmit over TCP. And you want to have a customized messege structure, like (command code, Length, data)

So simply make a structure using struct key word like

struct myBuffer
{
WORD commandCode;
LONG Length;
String str;
};

Now make an instance of that structure like,

myBeffer buf;
buf.commandCode = 1234; // store the command code.
buf.Length = 1234 // store the length.
buf.str = "asdasdasd" // store the string.

Now your buf is ready to be sent over TCP.

And if you want to store something in Big Indian order or Network Order, you can use the following set of commands,

htons(yourValue) // Host to network order. (for short)
ntohs(yourValue) // Network to host order. (for short)
htonl(yourValue) // Host to network order. (for long)
ntohl(yourValue) // Network to host order. (for long)

Hope that will help you...