02-15-2010
How to handle unplugging ethernet cable in socket programming
Hi, I am trying to implement a server-client socket communication. My server and clients are in different PCs. During communications if the ethernet cable is removed from the server side it shows broken pipe due to unable to write on the socket. I want to know how to check whether the ethernet cable is plugged or not before trying to write on socket. Is there any API to check ethernet connectivity that can be used in socket programming?? How can I check a socket is alive or not ??
Last edited by JagadishB; 02-19-2010 at 01:19 AM..
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LEARN ABOUT DEBIAN
vde_over_ns
VDE_OVER_NS(1) General Commands Manual VDE_OVER_NS(1)
NAME
vde_over_ns - Steganographic cable over NS protocol for Virtual Distributed Ethernet
SYNOPSIS
vde_over_ns [-D] [-c server_address] [-s vde_plug] [-i ip.to.bi.nd] domain.name
DESCRIPTION
A vde_over_ns allows to connect two remote vde_switches through steganographic NS query/response datagrams. e.g.:
dpipe vde_plug /tmp/s1 = vde_over_ns tun.mydomain.vde
binds to udp port 53 and listen for incoming steganographic NS queries (server mode). All the traffic to/from stdout/stdin is redirected
to the client via ns responses.
creates a wire between two vde_switches (with sockets /tmp/s1 and /tmp/s2 respectively). This cable looses 10% of the packets in each
direction.
The same vde_over_dns server can be created using:
vde_over_ns -s /tmp/s1 tun.mydomain.vde
The syntax is almost identical for the client mode, except that to have a vde_over_ns client connect to that server, the -c server option
must be specified.
OPTIONS
-s vdeplug
If specified, the vde_over_ns will connect to the local vde socket vdeplug instead pf stdin/stdout, using the libvdeplug library.
-D Detach console and send the process to background.
-b ip.to.bind
The NS server will bind only to the specified ip, instead of any ip. Only valid in server mode (without -c)
-c server_addr
If specified, client mode is enabled. Vde_over_ns will try to send NS requests to server_addr. If not specified, server mode is
enabled by default.
NOTICE
Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik und Informationstechnik"
i.e. the German "Association for Electrical, Electronic & Information Technologies").
SEE ALSO
vde_switch(1), vdeq(1). dpipe(1). unixterm(1).
AUTHORS
VDE_OVER_NS is a tool by Daniele Lacamera <root@danielinux.net>
VDE is a project by Renzo Davoli <renzo@cs.unibo.it>
based on nstx, a steganographic ns client/server software by:
Florian Heinz <sky@sysv.de>
Julien Oster <frodo@sysv.de>
Virtual Distributed Ethernet May 2, 2007 VDE_OVER_NS(1)