Subject: OpenVPN and port sharing - update
To: None <firstname.lastname@example.org>
From: Stephen Borrill <email@example.com>
Date: 05/15/2006 16:27:32
Got OpenVPN 2.1_beta14 working fine from a hacked pkgsrc and tested that
port sharing with Apache is working.
I made the changes from der Mouse to uipc_syscalls.c to add support for
MSG_NOSIGNAL and added the relevant line to sys/socket.h too:
#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
I chose the same value as Linux which I guess may help with running under
Linux emulation (or do we map flags anyway?). As a general point of
cleanliness, is this the right thing to do or should the next bit (0x400)
be chosen? FreeBSD use a different value (0x20000).
I then ran into a difference between Linux and NetBSD w.r.t. the
CMSG_ALIGN macro. On Linux it'll return a static size based on
sizeof(long). On NetBSD, it calls __cmsg_alignbytes() so is only known at
runtime. OpenVPN uses it in a global char declaration, so on NetBSD it
fails as it's unknown at compile time. I've hacked it by hand-implementing
the Linux macros. Anyone think of a better way?
Except for the small issues above, this shows the warnings about only
running on Linux were bogus.