UNIX programming

[AznMaverick]

I've been looking on google, but i haven't been able to find good source code on how to program basically a telnet session. Primarily i would just like to be able to connect to a remote system, send data (ascii string is fine), it would be a bonus to be able to receive data. How do i go about doing this?.

Thanks for your help!

 

[n0cmonkey]

Look at netcat.

There's plenty of source code out there, so finding an example shouldn't be difficult. 😛

 

[notfred]

Why not just use telnet?

 

[EpsiIon]

Google "telnet rfc"

 

[AznMaverick]

Originally posted by: notfred
Why not just use telnet?

i want to create a program that will be able to stream data using telnet w/o interface.

 

[znaps]

There are lots of examples in Java out there. Which language do you want to use?

 

[AznMaverick]

i'm most familiar with C. I thought i would be able to do it in C++, but i forgot how to deal with C++.

 

[kamper]

Two threads, one reads stdin and writes it to the socket, one reads the socket and writes it to stdout (or alternative files, if you so choose). It's pretty simple.

 

[Nothinman]

connect()
read()
write()
select()

If you're looking for scripting, use netcat.

 

[Barnaby W. Füi]

Originally posted by: kamper
Two threads, one reads stdin and writes it to the socket, one reads the socket and writes it to stdout (or alternative files, if you so choose). It's pretty simple.

Threads aren't very "unixy."

Besides being evil. 😛

(actually, probably *because* they're evil)

 

[kamper]

Originally posted by: BingBongWongFooey

Originally posted by: kamper
Two threads, one reads stdin and writes it to the socket, one reads the socket and writes it to stdout (or alternative files, if you so choose). It's pretty simple.

Threads aren't very "unixy."

Besides being evil. 😛

(actually, probably *because* they're evil)

Better than polling...

 

[Barnaby W. Füi]

Originally posted by: kamper

Originally posted by: BingBongWongFooey

Originally posted by: kamper
Two threads, one reads stdin and writes it to the socket, one reads the socket and writes it to stdout (or alternative files, if you so choose). It's pretty simple.

Threads aren't very "unixy."

Besides being evil. 😛

(actually, probably *because* they're evil)

Better than polling...

select()

 

[kamper]

And this is where my lack of c and unix knowledge makes me look dumb 😱 What's select()?

 

[Barnaby W. Füi]

RTFM! :| :| :Q

http://docs.hp.com/en/B2355-90136/ch03s02.html
http://www.coding-zone.co.uk/cpp/articles/140101networkprogrammingx.shtml
http://ou800doc.caldera.com/en/SDK_netapi/sockC.IOmux.html

 

[kamper]

Sorry, I guess I don't spend enough time browsing around for c api documentation 😛

otoh, "man select" told me everything I needed to know 😱