10-16-2007
socket programming : client server IPC
I'm new to socket programming. Have a basic doubt.
I have a structure(global) at the server side.
I have two different client connecting to the server. Will the changes made by one client on the structure be visible to the other client when it accesses the same client? I'm creating a STREAM socket. The client connects to server through connect call.
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ident(n) Identification protocol client ident(n)
__________________________________________________________________________________________________________________________________________________
NAME
ident - Ident protocol client
SYNOPSIS
package require Tcl 8.3
package require ident ?0.42?
::ident::query socket ?callback?
_________________________________________________________________
DESCRIPTION
The ident package provides a client implementation of the ident protocol as defined in RFC 1413 (http://www.rfc-edi-
tor.org/rfc/rfc1413.txt).
::ident::query socket ?callback?
This command queries the ident daemon on the remote side of the given socket, and returns the result of the query as a dictionary.
Interpreting the dictionary as list the first key will always be resp-type, and can have one of the values USERID, ERROR, and FATAL.
These response types have the following meanings:
USERID This indicates a successful response. Two more keys and associated values are returned, opsys, and user-id.
ERROR This means the ident server has returned an error. A second key named error is present whose value contains the error-type
field from the server response.
FATAL Fatal errors happen when no ident server is listening on the remote side, or when the ident server gives a response that does
not conform to the RFC. A detailed error message is returned under the error key.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category ident of
the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
KEYWORDS
ident, identification, rfc 1413
COPYRIGHT
Copyright (c) 2004 Reinhard Max <max@tclers.tk>
ident 0.42 ident(n)