[Openswan Users] Problem with interface ipsec0

[Stephan Mischnick (Prima - Systemtechnik)]

Hi,

we try to use klips with ipsec0 as interface 
(linux-2.6.33.6/openswan-2.6.27 klips only with kpatch). Configuration 
is okay so far, tunnels are established but it is not possible
to transmit pakets

bohr:/home/smi # /usr/local/sbin/ipsec eroute
0          10.22.0.0/16       -> 10.21.0.0/16       => %trap
0          10.22.0.0/16       -> 10.23.0.0/16       => %trap
...

a ping to e.g. 10.21.1.1 results in

PING 10.21.1.1 (10.21.1.1) 56(84) bytes of data.
ping: sendmsg: Invalid argument
ping: sendmsg: Invalid argument
^C
--- 10.21.1.1 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999ms

it seems that sendmsg results in an error EAGAIN, what might be the reason?

--- ipsec.conf extract ---
version 2
config setup
        interfaces=ipsec0=dsl0
        protostack=klips
        myid=@bohr.prima.de
        klipsdebug=none
        plutodebug=none
        uniqueids=yes

conn %default
        type=tunnel
        compress=yes
        authby=rsasig
        ike=3des-md5
        disablearrivalcheck=yes
        leftrsasigkey=%none
        rightrsasigkey=%none
        keyingtries=0

the same configuration seems to be good for older versions of openswan

thank you for any help

Stephan