From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-06-20T07:14:17+09:00
Subject: Re: How to get the response from a UDP socket.

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Try running your server process without threads. You may find out that
sock.send is throwing an exception that you can't see because it quietly
kills your thread.

Don't use connections with UDP. They don't make sense in the first place.

On 6/19/06, Hamid Rasoulian <hrasoulian@netstreams.com> wrote:
>
>
>
>
>
> Problem.  I set up a UDP socket connection. I send a message to the
> socket, and the destination device  receives the message correctly and
> act upon it, so far so good, but the destination device would send a
> message back to the host and I do not know how to capture that message
> and print the message.
>
>
>
> Here is what I do, the local port is $port1 and $IP1 and the destination
> assume to be $port2 and $IP2
>
> I do the following:
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>
>
> require  'socket'
>
> $port1 = 5000
>
> $IP1 = '10.15.0.21'
>
>
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> $port2 = 15000
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> $IP2 = '10.15.0.66'
>
>
>
> sock = UDPSocket.open
>
> sock.bind($IP1 , $port1)
>
> sock.connect($IP2 , $port2)
>
>
>
>
>
> server_thread = Thread.start do
>
>   server = UDPSocket.open
>
>   server.bind(nil, $port1)
>
>   2.times { p server.recvfrom(64) }
>
> end
>
>
>
>
>
> #  now I send the message to device.
>
> sock.send (" my UDP message", 0)
>
>
>
> # and immediately I enter this command
>
> server_thread.join
>
>
>
> But nothing happens. And no receiving message is being printed out,
> while I am sure the device has sent some message back.
>
> I just do not understand the receiving part of it.
>
> Can any body  help me with it.
>
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