I am learning socket programming on Linux (gcc).

I have used Vic Metcalfes code from the unix-socket-faq to build a server
that accepts connections using the select() command.

The code works great when telneting from Unix terminals, but when I telnet
from a Windows client the connection is dropped immediately.

Am I missing something obvious here? Is there an incompatibility with
Windows wheh trying to connect to a Unix socket on the server?

TIA
Bruce

Which is off-topic here, please see comp.unix.programmer.

If you need to say this, that's your first hint that it's OT.

Telnet is a protocol, not a name for "raw socket connection."  Have
you attempted to support the former or the latter?  Telnet is anything
but simple.  (This is not an invitation for discussion, but something
for you to think about, perhaps before you repost your question to
comp.unix.programmer.)

--

Sockets are not a standard C feature.

select() is not a standard C function.

The C standard does not specify Unix or Windows.

No idea... but maybe comp.unix.programmer or
comp.os.ms-windows.programmer would have some idea.

--

| Kingpriest of "The Flying Lemon Tree" G++ FR FW+ M- #80 D+ ADA N+++ |
| http://www.helsinki.fi/~palaste       W++ B OP+                     |
\----------------------------------------- Finland rules! ------------/

"Hasta la Vista, Abie!"
   - Bart Simpson

They sent me here as I am writing the code in C!

Bruce

Then they sent you to the wrong place. comp.unix.programmer is for Unix
programming, regardless of the language. They might just as well send
you to alt.english.usage since you're posting your message in English.

--

| Kingpriest of "The Flying Lemon Tree" G++ FR FW+ M- #80 D+ ADA N+++ |
| http://www.helsinki.fi/~palaste       W++ B OP+                     |
\----------------------------------------- Finland rules! ------------/

"'I' is the most beautiful word in the world."
   - John Nordberg

Then they're {*filter*}heads. This group is for ISO C, not for system-specific
extensions.

Richard

This is off topic; sockets are not part of the C language, but rather an
operating system interface with a C binding.

Hint: people use protocols over top of TCP/IP. In writing your server for
telnet clients, you forgot to implement the telnet protocol.  Another hint: the
Windows telnet client is complete, utter crap.

You are lying. I had a look in comp.unix.programmer, and I did not find such a
reply to your question.  I found one reply telling you to get a better Windows
telnet client; it did not mention comp.lang.c.

I noticed that you have been pestering comp.unix.programmer with a lot of
questions about platform-independent C basics like printf, va_list, malloc and
free and so on.  I can see why you would be redirected here for *those* topics.

Windows telnet client is complete, utter crap.<

That may be so. But if I want my server code running on Unix to support
connections from Windows clients I'll need to change it somehow.
The server code supports telnet connections from Unix.

Bruce

If you want to write a telnet daemon, you'll have to implement the
Telnet protocol. Go to http://www.*-*-*.com/
search for the appropriate RFCs.
Once you see how much material that is, decide not to reinvent that
particular wheel and choose a smaller project.

Gergo

--
There's just something I don't like about {*filter*}ia; the state.

So it's not a C issue, and it's not a UNIX issue. Hmm, I guess you are
off to some Windows newsgroup. Hope your news client supports rich text
and can view MS Word and Excel attachments. :)