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

[Johnny Billquist]

Mark, I don't think Bob suggested he used some special program to connect simh to a tap device.
What he did was use my bridge to connect his machines to HECnet, which is a step on the other side of the tap device.

By the way, Bob, I know that I've seen a patch to simh in the past, to connect to HECnet directly from simh, without the addition of the bridge program. Maybe something to use?

	Johnny

On 2013-11-10 18:53, Mark Pizzolato - Info Comm wrote:
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



-- 
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol