Yesterday , I was speaking about a nteworking program (client-server) , , client
running on 10.10.1.15
and server (prog.) running on 10.10.1.4
I am very grateful for the generous help of suggestions ,
I received from all.
Well this is the current situation :-
1) I started the server program at 10.10.1.4
2) I did netstat -an|grep 9888 at 10.10.1.4 and received the following
information :-
[shyam@ 10.110.1.4 shyam] $ netstat -an|grep 9888
tcp 0 0 0.0.0.0.9888 0.0.0.0.* LISTEN
3) I also tried from the (supposed client mac) 10.10.1.1. :-
telnet 10.10.1.4 23
& I am getting connected .
4) Now on 10.10.1.15 , I start the client program and try netstat on the
server (10.10.1.4)
[EMAIL PROTECTED] shyam] $ netstat -an|grep 9888
tcp 0 0 10.10.1.4:9888 10.10.1.15:1025 ESTABLISHED
tcp 0 0 0.0.0.9888 0.0.0.0:* LISTEN
5) Now the client (10.10.1.15) types in some message that is
supposed to go to the server. and this is where my problems start :
The program has been written such that , once the server sitting at
10.10.1.4 and
listening at 9888 , gets what the client has typed , ( which I do not see on
the
server prog's
console) , the server flashes a reply back to the client (and he is supposed
to
see that)
BUT , neither the message typed by the client on his console , nor the message
typed by the server on his console , get displayed on the other's console !
I reason out two possible causes : -
1) a) Maybe , programmatically , I need to indicate EOL or EOT , on each side
to show that each has completed his writing and to finally send it .
b) May be , the programs have not handled input/output properly .
.
2) May be, the data may not be moving across the wire .
But when I checked things out , I do not find reasons for suspecting the
program.
Should I attach the server(tcp) and the client(tcp) ?
Thanks for all help,
([EMAIL PROTECTED])
Shyam
----- Original Message -----
From: "Dmitriy Kropivnitskiy" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <debian-user@lists.debian.org>
Sent: Saturday, November 17, 2001 2:01 AM
Subject: Re: Making a TCP or UDP or Unux Socket Server Listen on a port
Can your systems ping each other?
On Thursday 15 November 2001 11:35 am, [EMAIL PROTECTED] wrote:
> I am having Server Programs (for TCP,UDP,Unix Sockets) , that listen on a
> port number say , 9888 at
> 10.10.1.4
> and they are being contacted by a Client (for TCP,UDP,Unix Sockets) Linux
> machine from 10.10.1.1 .
>
> Both macines are on the LAN , nothing more nothing less . We have not yet
> gone for any higher stuff like DNS , etc . So , basically 10.10.1.4
> and 10.10.1.1 are not on any Linux network , but simply they identify and
> respond on the LAN.
>
> My Clients and Server (socket programs) do not communicate at all on this
> network .
>
> Please guide me on what I should do .
>
> My line of thinking is : Add some entry to the
> /etc/services specifying the port , but this is what I tried and failed
> :- # At the bottom of /etc/services :-
> tcp 9888/tcp
> a.out 9889/tcp
>
> Please help me get these programs to communicate .
>
> Warm regards,
> ([EMAIL PROTECTED])
> Shyam
