OpenVPN and passtos option

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

	Hello,

	I use for a long time OpenVPN (2.3.11) between a Linux server and a 
NetBSD client. I'm trying now to use VoIP on this VPN. Thus, I have 
added on both sides QoS (tc on server and altqd on client). I have to 
add passtos option to openVPN configuration.

	On Linux, pastoss works as expected. But not on NetBSD side. For example :

legendre# ping  -t 0x68 192.168.1.1

10:49:54.021047 IP (tos 0x0, ttl 53, id 60404, offset 0, flags [none], 
proto UDP (17), length 169)
    x.y.z.t.openvpn > a.b.c.d.openvpn: [udp sum ok] UDP, length 141
10:49:54.021336 IP (tos 0x68, ttl 64, id 50686, offset 0, flags [DF], 
proto UDP (17), length 169)
    a.b.c.d.openvpn > x.y.z.t.openvpn: [udp sum ok] UDP, length 141

a.b.c.d runs Linux, x.y.z.t runs NetBSD.

	Of course, I have added passto on both sides. I have checked that 
PASSTOS_CAPABILITY was defined (1) during compilation. In my case, 
openvpn run as root (nice -20).

	Is it possible to use passtos option with openvpn ?

	Best regards,

	JKB