I have tested this on Linux "without DCO" and "with DCO", client 
and server.  The non-DCO server version isn't really helpful as it
puts all tun interface into p2p mode ("routing happens inside OpenVPN"),
but the TAP interfaces shows the expected "broadcast" setting - as does
the "tun / topology subnet" client.  On the DCO "tun" servers the 
handling of routes/iroutes is different, and the expected netmask + brd
shows up.  And the tests still pass :-)

Your patch has been applied to the master and release/2.6 branch
(whether it's "a bugfix" stands to be debated - but it is not very
intrusive and has passed all my system tests, and if the lack of
broadcast did break people's working 2.5 setups they will well
consider it a "bug"... so, "bugfix")

commit 0df0edc49ce4acb96c8e16bdf0fcee1eedfd91f0 (master)
commit 4e46e727217cf58c7c671e36e8417e469c4e3b1d (release/2.6)
Author: Sebastian Marsching
Date:   Mon Sep 15 13:05:07 2025 +0200

     Bugfix: Set broadcast address on interface.

     Signed-off-by: Sebastian Marsching <[email protected]>
     Acked-by: Antonio Quartulli <[email protected]>
     Message-Id: <[email protected]>
     URL: 
https://www.mail-archive.com/[email protected]/msg33131.html
     Signed-off-by: Gert Doering <[email protected]>


--
kind regards,

Gert Doering



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