Apple

Yes, "shutdown" returns an error for an unconnected socket. Did you "connect" your socket to a particular UDP address on the remote? Or is your socket simply bound and accepting UDP traffic from anyone?

There's not a lot of point calling "shutdown" on a UDP socket. It MAY allow you to reconnect the socket to another address, but I haven't tried that. For a TCP socket, "shutdown(fd, SHUT_WR)" is basically sending a TCP FIN packet. You can still receive data at this point. Generally, I've seen "shutdown" used for closing TCP connections gracefully:

// send a TCP FIN

shutdown(fd, SHUT_WR);

// now receive until we get a FIN (i.e., "recv" returns zero)

while ( 1 )

{

bytes = recv( fd, buffer, sizeof( buffer ) );

if ( bytes > 0 )

{

// do something with data if you want

}

else if ( bytes == 0 )

{

// other side sent a FIN -- the connection is now closed

}

else

{

if ( errno != EAGAIN )

{

// we got an error on recv -- the connection is probably closed

}

else

{

// need to wait for more data...

exercise_for_reader();

}

Rob

On Dec 27, 2007, at 7:54 AM, parag vibhute wrote:

In UDP connection at client side, I am not calling connect API so it may happen that shutdown failed as man page tells that shutdown fails if socket is not connected. But am I right? Also then in Tiger & Panther why am I not getting any error & only in Leopard, I am getting the error?

Regards,
Parag Vibhute

On 27-Dec-07, at 3:35 PM, parag vibhute wrote:

Hi,

My application is using UDP BSD socket for connection. At the end of communication, I am shutting down socket by using SHUTDOWN API & then closing it by using CLOSE API. In Panther & Tiger, it is working fine but in leopard I am getting error that SHUTDOWN is failed, can somebody tell me what is wrong here?

Regards,
Parag Vibhute
echo alclr.qzcefyptyqzepns@nzx | tr a-z@. p-za-o.@

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References:
	>Problem in leopard regarding socket shutdown (From: parag vibhute <email@hidden>)
	>Re: Problem in leopard regarding socket shutdown (From: parag vibhute <email@hidden>)