How to handle unplugging ethernet cable in socket programming


 
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Old 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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rpc(n)								 Tnm Tcl Extension							    rpc(n)

__________________________________________________________________________________________________________________________________________________

NAME
rpc - A simple RPC protocol for Tcl applications. _________________________________________________________________ DESCRIPTION
RPC COMMAND
rpc server port Set up an RPC server listening an port port. This command returns a rpc handle that be used to register Tcl procs that will be exported by a trivial RPC protocol on top of TCP. This RPC mechanism allows us to write cooperating scripts without worrying much about the communication protocol. rpc client host port Connect to the RPC server running on host with port port. The returned client handle can be used to invoke an exported proc on the server host. rpc delete handle Delete a server or a client RPC handle. All connections associated with the handle will be closed. rpc register rpchandle proc Export proc as an RPC callable proc using the server handle rpchandle. Only registered procs can be called by RPC clients. rpc unregister rpchandle proc Remove proc from the list of exported procs on server handle rpchandle. rpc info [rpchandle] Calling rpc info without any arguments returns a list of all rpc handles that have been created using the rpc server and rpc client command. Info about a specific rpc file handle rpchandle is returned by using the optional argument. The result is a list contain- ing the tcp file handle used for the communication and the list of registered commands for a rpc handle and a list of all files that represent connections to an rpc server. This list is empty if rpchandle belongs to a rpc client. rpc# [-async] proc arg1 arg2 ... To invoke a remote procedure proc, use the same syntax as used with a local invocation preceeded by a client rpchandle. The result of the remote procedure call will be returned or an error if the underlying communication channel signals errors. The -async options can be used to invoke proc without waiting for it to complete. The async option will never return a result. SEE ALSO
scotty(1), Tcl(n) AUTHORS
Juergen Schoenwaelder <schoenw@cs.utwente.nl> Tnm rpc(n)