Issue 028 - DPWS - Review constants

[Ram Jeyaraman <Ram.Jeyaraman@microsoft.com>]

This issue is assigned the number 028. For further discussions on this issue, please refer to this issue number or use this thread.

-----Original Message-----
From: Antoine Mensch [mailto:antoine.mensch@odonata.fr]
Sent: Tuesday, September 16, 2008 4:33 PM
To: Ram Jeyaraman
Subject: NEW Issue - Review constants

Please defer discussions on this issue until a time this issue is
accepted and is assigned a number.

Document: DPWS
Location (defaults to line number): 1431
Owner: Antoine Mensch

Description:
the APP_MAX_DELAY has been set to 5000 ms. However, default firewalls on
popular platforms such as Windows XP SP2 and Windows Vista filter out
responses to multicast requests after 3 and 4 seconds. This means that
clients running on those platforms will fail to discover devices from
times to times. Our workaround has been to reduce the APP_MAX_DELAY to
2500 ms. When DPWS becomes a standard, we should expect firewalls to
adjust their behavior to the standard, but until then, it is an
important issue.

Proposed resolution:
Either reduce APP_MAX_DELAY or modify default behavior of Windows firewalls