how do I impliment my tcp client server programing asynchronous

Hi,
  Richard Stevens book contains a very good description on that subject. Please consider buying one if you are into network programming.

1) use select and poll
2) use O_NONBLOCK on socket descriptors.

description here:
http://squirl.nightmare.com/medusa/async_sockets.html

regards
Manish regmi

at present I have no Richard Stevens book .... So pls depict an example using select() and poll()

as soon as possible

it can't gunzip under linux.. using

gunzip unv12e.tar.gz

it gives unexpected end of file

may be download is corrupted. Its working fine for me.

try downloading again

try using
tar xzf filename

regards
Manish Regmi

ya got it...

but there are so many folder and file.... where I should look in... pls tell me... the required folder and file for select and poll code

advio folder

Here is some info on poll and select:
http://builder.com.com/5100-6372-1044098.html

regards
Manish Regmi

As network programming is based on 2 concepts : connection oriented TCP or connection less UDP

So the server can be concurent or iterative. The protocol that you use it's up to you to implement. So you can create a heap or a list based on priority.