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Full Discussion: tcp/ip problem
Operating Systems Linux Red Hat tcp/ip problem Post 302274400 by Neo on Wednesday 7th of January 2009 01:26:51 PM
Old 01-07-2009
Quote:
Originally Posted by amar20
how the data is supplied to tcp/ip packet from the disk.
how we can trace behavior of that process.
Quote:
Block special files or block devices correspond to devices through which the system moves data in the form of blocks. These device nodes often represent addressable devices such as hard disks, CD-ROM drives, or memory-regions.
First, I suggest you read this on Wikipedia:

Device file system - Wikipedia, the free encyclopedia

The underlying operating systems provides system level calls that permit I/O operations. Without getting into the relationship between the devices, the kernel and the shell, I will simplify by saying, that there are underlying system calls that provide programs access to the disk and other devices, like network devices, their buffers and data structures.

So, depending on your platform (operating system), you need to look at your kernel level system calls that are accessible to the programmer. These APIs are often C programs in most computer systems today.

Another hint: Take a look at this book, for example, Beginning Linux Programming and learn about system calls.
 

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LEARN ABOUT SUSE

tcp-env

tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME

       tcp-env - set up TCP-related environment variables

SYNOPSIS

       tcp-env [ -rR ] [ -ttimeout ] program [ arg ...  ]

DESCRIPTION

       The  input  for  tcp-env  must be a TCP connection.  tcp-env finds out information about that connection, puts the information into several
       environment variables as described in tcp-environ(5), and runs program with the given arguments.

       Usually tcp-env is run from inetd.  It might instead be run from another server that already sets up the right  environment  variables;  if
       PROTO  is  set  to  TCP  when  tcp-env  is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
       whether the input is a TCP connection.

OPTIONS

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

       -ttimeout
              Give up on the TCPREMOTEINFO connection attempt after timeout seconds.  Default: 30.

SEE ALSO

       tcp-environ(5), inetd(8)

                                                                                                                                        tcp-env(1)
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