[HECnet] DECnet/Python

[Thomas DeBellis]

TOPOL?  Hmm...  No, I hadn't heard of that, either.  It sounds almost 
familiar, but I don't know why Tops-20 would be asking for it because 
it  doesn't appear to be serving it, viz:

    This is node VENTI2    NSP version 4.0.0    Routing version 2.0.0

    Job  Program    Type      Object  Host    State      Trans Recv     User

      2   SYSJB1   SRV (559)   PHONE   VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   POSI    VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   POSI    VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   POSI    VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   MAIL11  VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   TASK    VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   NCU     VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   FAL     VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   NCU     VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   EVENT   VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   FAL     VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   LOOP    VENTI2  CI wait        0 0  OPERATOR
      2   SYSJB1   SRV (559)   FAL     VENTI2  CI wait        0 0  OPERATOR
    NRT           SRV (559)   NVT     VENTI2  CI wait        0     0
    CTM           SRV (559)   CTERM   VENTI2  CI wait        0     0
    ---

The numerics for the objects would be the following (last column with SRV:

    JFN Program  Fork  Pointer Status          File Specification:
    25    --      35   0(8)        Rd App          SRV:29..0
    26   ORION    21   0(8)        Rd App SRV:47..0
    27   ORION    21   0(8)        Rd App SRV:47..0
    30   ORION    21   0(8)        Rd App SRV:47..0
    31   VAXMAIL  33   0(8)        Rd App SRV:27..0
    33   FAL      61   0(8)        Rd App SRV:FAL..0
    35   FAL      57   0(8)        Rd App SRV:FAL..0
    36   FAL      54   0(8)        Rd App SRV:FAL..0
    37   NMLT20   31   0(8)        Rd App SRV:19..0
    40 NMLT20 31   0(8)        Rd App          SRV:26..0
    41 NMLT20 31   0(8)        Rd App          SRV:25..0
    42 NMLT20 31   0(8)        Rd App          SRV:19..0
    46   SMTP     34   0(7)        Rd App SRV:TASK.MX-LISTENER.0

    Frk Prog   State         PC         Time
      21 ORION  Sleep         415313     0:24    51
      31 NMLT20 Sleep         562473     3:54     7
      32 FAL    Sleep         415312     0:00    60
      33 VMAIL  Sleep         040313     0:00     9
      34 SMTDCN Sleep         000675    27:51     0
      35 PHNSRV Sleep         400270     0:00     3

So, no TOPOL that I can discern.  See if you can get me a bit of a 
packet trace, would you?  I'll have a look around.

If it's in the NICE process (NMLT20), I'll be out of luck because they 
never released those sources, but maybe it's in ROUTER.

On 10/27/21 8:54 PM, Paul Koning wrote:
>
>> On Oct 27, 2021, at 8:44 PM, Peter Lothberg<roll at stupi.com>  wrote:
>>
>> ...
>> The 4.x DECnet over DDCMP DUP/KMC for 2020 has reduced "segment size'
>> from 576 to 390 or something like that due to limited buffer space.
> 256 actually.  Why, I don't know, but since that is communicated to the other end in the connect initiate or connect confirm message, it doesn't cause any problems only than some possible drop in performance.
>
> PyDECnet can talk to those Phase II nodes, at least to some extent; it needs some cleanup.  The intercept support in particular is incomplete.
>
> Speaking of which, I noticed that TOPS-20 upon connecting sends to its neighbor (my PyDECnet router) a connect request for an object named "TOPOL".  That suggests some sort of topology information service, which makes sense.  But I have no idea what that thing does, what requests it excepts and what its reply should look like.
>
> Very long shot: does anyone have any idea?  Any way of getting a network trace, perhaps?
>
> 	paul
>
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