On OpenBSD 4.0 release, I'm trying to get up ppp(8) to run over UDP. The
manpage isn't clear about how to set up the server side of this.
I've added to /etc/services:
ppp-in 6669/udp
ppp-in 6669/tcp
And to /etc/inetd.conf:
ppp-in dgram udp nowait root /usr/sbin/ppp ppp -direct ppp-in
ppp-in stream tcp nowait root /usr/sbin/ppp ppp -direct ppp-in
and HUP'd inetd.
/etc/ppp/ppp.conf contains:
ppp-in:
set timeout 0
set ifaddr 10.0.4.1 10.0.4.2
This works for incoming connections over TCP, but not UDP.
I've tried both 'wait' and 'nowait' in inetd.conf. In both cases, when I
send a single UDP packet using nc, I immediately get 4 ppp children started
(which I suspect is limited just by the number of 'tun' devices available)
# ps auxwww | grep ppp
# nc -u 127.0.0.1 6669
foo
?_?foo
^C
# ps auxwww | grep ppp
root 5298 0.0 0.3 660 1468 ?? Ss 4:41PM 0:00.02 ppp -direct
ppp-in
root 10152 0.0 0.3 688 1476 ?? Ss 4:41PM 0:00.02 ppp -direct
ppp-in
root 20206 0.0 0.3 668 1484 ?? Ss 4:41PM 0:00.01 ppp -direct
ppp-in
root 12291 0.0 0.3 532 1460 ?? Ss 4:41PM 0:00.01 ppp -direct
ppp-in
#
The same applies when using ppp itself as the client:
# ps auxwww | grep ppp
# ppp
Working in interactive mode
Warning: iface rm: ioctl(SIOCDIFADDR_IN6, fe80:d::248:XXXX:XXXX:XXXX/64): Can't
assign requested address
Using interface: tun0
Warning: No default entry found in config file.
ppp ON gw> set device localhost:6669/udp
ppp ON gw> set speed sync
ppp ON gw> set log all
ppp ON gw> dial
ppp ON gw>
PPp ON gw> Warning: ff02:d::/32: Change route failed: errno: Network is
unreachable
ppp ON gw>
PPp ON gw>
[on another screen]
# ps auxwww | grep ppp
root 5683 0.0 0.3 708 1488 ?? Ss 4:43PM 0:00.01 ppp -direct
ppp-in
root 21871 0.0 0.3 624 1480 ?? Ss 4:43PM 0:00.02 ppp -direct
ppp-in
root 23410 0.0 0.3 572 1468 ?? Ss 4:43PM 0:00.02 ppp -direct
ppp-in
root 23090 0.0 0.3 736 1592 p2 S+ 4:43PM 0:00.01 ppp
So, something's not right here. Have I just made a simple error, or is there
something other than inetd required to accept incoming PPP-over-UDP
connections?
Regards,
Brian.
