From: cilphex <cilphex@...>
Date: 2005-11-30T12:52:30+09:00
Subject: Ruby and C network interaction

Hi,

I'm working on a small client/server application in my spare time,
using C and win32 for the client and Ruby for the server.  I'm having
an interaction issue and was wondering if anyone could help.  I'm not
an expert in Ruby or networking :\

Anyway, on the client side I set up a socket and connect to the server,
then send a username with:

send (socket, myMessage, sizeof (myMessage))

Which works fine.  The Ruby server receives and prints it with:

username = session.recv(20).strip
puts "Username: '#{username}'"

(session is an instance of TCPServer)

A password is sent the same way.  My trouble occurs when I try to send
data back to the client from the server.

The client tries to receive with:

recv (socket, sockMsg, sizeof(sockMsg), 0);

And the server sends with:

sent = session.send("success", 0)
puts "#{sent} characters sent"

The server outputs "7 characters sent", but I don't receive anything on
the client side.  I output the contents of sockMsg, and it's empty.

Server code is here (It's not much, just something simple):
http://www.craighammell.com/code/server.rb

Any help would be appreciated.

Thanks.