UDP transfer

Folkes · 02-27-2012, 11:27 AM

Hi.... I need some help.
If I want to make connection betwen 2 Laptop with UDP, theres is, the Laptop one (client) must send sample file in several time with checksum, and receiver must receive one by one of file and will display all of data at the end.
Can you help me make the source program for client and server..?? thank you..

anomie · 02-27-2012, 12:02 PM

Is this a one-off, or a more formal application?

If a one-off, I'd simply hack something together with nc(1) and sha1sum(1). If a more formal app, I'd learn Perl.

sundialsvcs · 02-27-2012, 03:10 PM

I suggest that you bear in mind two things:

You are contemplating the use of the wrong protocol. The UDP protocol was not designed to do the things that the TCP/IP protocol stack was designed to do.
You are contemplating "to do a thing that has already been done." Don't do that.

anomie · 02-27-2012, 03:19 PM

Good point about UDP. (In retrospect, OP's problem sounds contrived enough to be a homework assignment.)

sundialsvcs · 02-27-2012, 07:09 PM

Dunno... I actually had the very brief misfortune of being tangentally involved with a group that was trying to use the so-called Andrew File System (AFS), a moldy-oldy long distance networking protocol that apparently was still being used by someone on Wall Street who had never heard of what (e.g.) Brocade Systems has been doing for the past ten years. That piece of crash-and-burn-ware used UDP. (Apparently because the TCP/IP protocol had not been finalized at the time it was started.)

Fortunately for me, that engagement was stillborn.