[HECnet] HECnet bridge and tun/tap problems on Ubuntu 12.04 ...

[Mark Pizzolato - Info Comm]

Hi Bob,
  
Recent simh versions no longer need any external program to work with tap devices.   There is integrated support for tap devices, and there also is support for the more generic vde networking capabilities.   The latest source is available at: https://github.com/simh/simh/archive/master.zip
  
To build on Ubuntu 12.0.4 the first time, as root you may need to:
                               # apt-get install libpcap-dev
                               # apt-get install libvdeplug2-dev
Then as a normal user:
                               $ make vax
  
-                   Mark
  
From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Bob Armstrong   Sent: Sunday, November 10, 2013 9:08 AM   To: hecnet at Update.UU.SE   Subject: [HECnet] HECnet bridge and tun/tap problems on Ubuntu 12.04 ...
  
   It   s not exactly a DEC problem, but I know there are several people on HECnet running simh under Linux and I   m hoping somebody has already figured this one out.
  
   I used to run simh (vax and pdp11 both) under Ubuntu 10.04 using Johnny   s bridge program and a tap device to connect to HECnet.     
  
sudo tunctl -t tap0
sudo ifconfig tap0 up
sudo -b /usr/local/bin/hecnet-bridge 4711
  
the bridge.conf file (I   ll post it if anybody wants) bridges tap0 with Psilo.update.uu.se and in simh I would say
  
                             set xqb enabled
attach xqb tap0
  
and it worked great.   Everybody was happy :-)
  
   BUT, now I   ve upgraded to Ubuntu 12.04 (Ok, I   m not an early adopter!) and, as you might guess, it doesn   t work anymore.   No errors and the tap0 device looks OK
  
                             bob at falsetto:~/legato$ ifconfig tap0
tap0           Link encap:Ethernet   HWaddr c6:36:37:eb:16:7a
                            UP BROADCAST MULTICAST   MTU:1500   Metric:1
                            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
                            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
                            collisions:0 txqueuelen:500
                            RX bytes:0 (0.0 B)   TX bytes:0 (0.0 B)
  
but nothing ever happens.   No data seems to pass between the bridge program and simh.  
  
   Is anybody else using Ubuntu?   Did you run into this problem?      Thanks,
Bob