4_3_99_12, xdmcp, IPv6

[Martin Birgmeier]

Dear XFree hackers,

I have the following problem since IPv6 support was enabled:

Scenario:
  - Running 4_3_99_12 (also tried with 4_3_99_10 before)
  - FreeBSD 4.8 Release
  - Running xdm in daemon mode, listening for XDMCP requests,
    no servers started directly by xdm (Xservers is empty).
  - Starting an X server (on the same machine) with the
    following command line:
/usr/X11R6/bin/XFree86  :0 vt2  -query gandalf  -displayID gandalf:0    -cookie xyzzy 
-xf86config
/etc/X11/XF86Config -logfile /var/log/XFree86.0.log
Bug:
  - Since IPv6 has been in the code (after 4_3_99_2, which
    still works, and which I am running now), the X server
    times out while trying to contact xdm. It will then
    restart & retry.
Secondary bug:
  - This restarting & retrying seems to confuse the internal
    state of the server, such that it accepts vty switches
    only after repeatedly pressing <ctrl> <alt> Fn.
Possible cause: Using lsof, I can see that xdm has only opened
an IPv6 xdmcp socket. Maybe the server is sending requests
for management only via IPv4. On the other hand, the server
seems to be able to successfully contact the font server, as
far as I can see from tcpdump output and from the server log
file.
I'd be glad if you could fix this.

Thanks for a great product & regards,

Martin

--
Martin Birgmeier
Vienna
Austria
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