RS232 to TCP/IP? Software sources?

[ehnonymouse]

Hi, I've done quite a lot of microcontroller programming in C under windows, but I'm wanting to develop code on an embedded Linux system to take RS232 input from a port and send it via TCP/IP to another machine. I'm not sure where to start really. The things I'm new to here are Linux and TCP/IP.
Well, I have a little experience with Linux but not coding for it.

It's not a simple RS232 to TCP/IP converter I want to make, or I would just buy a Lantronix device or similar. I'm wanting to manipulate the RS232 strings before I send them.

Is there any open source software repository that I could look at to see whether i can get any ideas / source code to modify. I've had a look on sourceforge but I'm not sure where else to look.

[GNU-Fan]

If you are familiar with WinSock, the TCP/IP part will be a walk in the park for you, because both use essentially the BSD style sockets interface with some minor deviations.

For the RS232, you might want to look into Serial Programming:Serial Linux - Wikibooks, collection of open-content textbooks

[ehnonymouse]

Thanks for your reply, but I am almost totally unfamiliar with TCP/IP programming whereas I have used UARTS on micros/VB6/C#. The bit that concerns me is in fact the TCP/IP.

Any leads to any open source software repositorys?

[GNU-Fan]

The closest match I know would be the program "netcat" which is a tool that bridges StdIn/Out <-> TCP/UDP.

But I'd rather recommend you this read:
Beej's Guide to Network Programming
I have learned socket programming with it.

[ehnonymouse]

Thank you very much for that. I'll do some reading, it's stuff I should learn anyway.

Tim