how to call function at server

johnjohn11 · Just In Joined: 14 Jun 2004 Posts: 1

Hello everybody,

I need some help from you.

It is all around socket programming.
I got my client and server worked, it is just a simple socket programming with read() and write().

Suppose I know there is a function at the server side: void foo(char *bar).
Is it possible from client to call this function? if yes, how can i do this? what should i do?

thank you

quantum

The way socket servers and client programs work, this is mainly determined by the server side program. If the server side socket is allowed to response to a reuqest to run the foo() function, then it can execute the function. The client side program does not have much control on it. Client side can only initiate a request, say with an ID number 3021. Server side program checks the id number from the request and if the client is authenticated and the id number is associated with the function then the server program starts the function.

More details would be helpful to see if it can be done what you are really trying to do. If you are writing the program in any version of C or VC++, you can post a new thread in C forum. There are some netwroking experts talk in there.
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Guest

what i want to do is something like this

server and client communicate with TCP
there is a function in server call void foo(char *bar),

server.c
void foo(char *bar)
{
sprintf("yes", bar);
}

I want at the client to call that function. Can I write something like this in client?

client.c

char *A;
foo(&A);

and when i call the function I got "yes" in A

is this possible to do?

quantum

This looks to be certainly possible. But I am not really a C guy. Post the problem and code in the C forum...you will get a definitive answer in a few hours.
_________________

Dust fills my eyes / Clouds roll by / and I roll with them / Centuries cry / Orders fly / and I fall again
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Tousif

Hi,
What you are looking for is Remote Procedure Call - RPC. It is not really possible to give a detailed description of the RPC here..however this link below I think gives quite a detailed description of the usage of the C RPC library.

[http://www.cs.cf.ac.uk/Dave/C/node33.html]

By the way...the C/C++ forum would be the appropriate place for this thread.

Cheers,
Tousif