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RE: recv and errno during a connection reset/closed by peer
- From: Brian Ford <ford at vss dot fsi dot com>
- To: Peter Stephens <ptfoof at sbcglobal dot net>
- Cc: cygwin at cygwin dot com
- Date: Tue, 29 Mar 2005 10:36:04 -0600
- Subject: RE: recv and errno during a connection reset/closed by peer
- References: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAUKQItienSEKG+9226yKd5cKAAAAQAAAADZbnjoLqKEeI3+lfe/tpAgEAAAAA@sbcglobal.net>
- Reply-to: cygwin at cygwin dot com
On Mon, 28 Mar 2005, Peter Stephens wrote:
> Brian
>
> Are you saying that there is no way to distinguish a dropped connection from
> a MSG_PEEK with no data to retrieve?
AFAIK, yes. Why are you using this MSG_PEEK method?
Why not just do a poll and look for POLLHUP
(http://www.opengroup.org/onlinepubs/009695399/functions/poll.html):
POLLHUP
The device has been disconnected. This event and POLLOUT are
mutually-exclusive; a stream can never be writable if a hangup has
occurred. However, this event and POLLIN, POLLRDNORM, POLLRDBAND, or
POLLPRI are not mutually-exclusive. This flag is only valid in the revents
bitmask; it shall be ignored in the events member.
and http://cygwin.com/acronyms/#PCYMTNQREAIYR ;-).
--
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...
--
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