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Problem and question with TCP

 
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Old 02-03-2015
Problem and question with TCP
Hi guys , i write this message for a doubt, a time ago i wrote a client/server program with TCP/IP in Linux. When i tested the program flooding the server with messages of 1024 bytes (Or 1025 bytes i dont remember exactly the number but was more that 1000 bytes) in certain point a message was received truncated blocking the program because the while(recv) never completed the 1024 characters count. I avoided this problem making the messages more shorter (i don't remember 200 bytes i guess) but i know that is not ok. Now i must develop a very strong connection (avoiding so much as posible the lost of messages) and i need understand why this happened and how avoid this problem. Maybe the net was oversaturated in that moment when i tested my program and a part of the message was lost but this is not a excuse. My question is ¿There is some protocol that avoid the lost packages (i know that tcp does the best effort for send the message but i saw how a message or part of it came truncated more than once) or either very strong or I must develop a protocol for this?

I read about Reno TCP and TCP Vega but really i dont know how use it.

Thank you very much
 
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LEARN ABOUT HPUX

tryfrom

tryfrom(1)						      General Commands Manual							tryfrom(1)

NAME

       tryfrom, sffinger - utility programs for TCP Wrappers

SYNOPSIS

DESCRIPTION

   tryfrom
       This  program  identifies  the  end-point details related to a connection.  This program must be called via a remote shell command as shown
       below.  It is used to find out if the hostname and the address are properly recognized, and also if the username lookup works properly.

       prints the following output when it is invoked:

       The information related to the client describes how the remote host recognizes the client in terms of address, name  and  user  name.   The
       information related to the server gives the remote host's details.

       See hosts_access(5) manual page for more information on expressions.

   sffinger
       This  is  a wrapper program to the finger(1) client which offers better protection against the possible damage from data sent by the remote
       server.	This command accepts all the options supported by finger(1).

       It is recommended to use this program in the implementation of traps in the access control language of and See hosts_access(5) man page for
       more information on setting traps.

       This  program  restricts  each line length to 128 bytes and total response to a maximum of 100000 bytes.  uses 60 seconds time-out value in
       getting the response from the remote host's server.

AUTHOR

       Wietse Venema (wietse@wzv.win.tue.nl),
       Department of Mathematics and Computing Science,
       Eindhoven University of Technology
       Den Dolech 2, P.O. Box 513,
       5600 MB Eindhoven, The Netherlands

SEE ALSO

       finger(1), tcpd(1M), hosts_access(5).

																	tryfrom(1)