[nos-bbs] linFBB outgoing compressed fwd to JNOS - a discovery

Michael E Fox - N6MEF n6mef at mefox.org
Tue Feb 10 15:25:25 EST 2015


Since I'm not familiar with FBB, can you elaborate on how the linFBB "N"
setting below correlates with the JNOS mbox fbb setting?  For example, as
best I can tell:

JNOS mbox fbb 0 works with linFBB N 0
JNOS mbox fbb 1 works with linFBB N 1
JNOS mbox fbb 2 says it's "compressed and batched".  Does that equat to
linFBB N 2 ("FBB+BIN")?

Also, pardon my ignorance.  But isn't there some sort of negotiation of the
protocol based on the capabilities of each end?  Or perhaps an algorithm to
choose the least common denominator based on the SID?  In other words, even
if linFBB is set to the default, shouldn't FBB and JNOS negotiate down to
whatever is the best that both can do, even if that is just plain text?


> -----Original Message-----
> From: nos-bbs-bounces at tapr.org [mailto:nos-bbs-bounces at tapr.org] On Behalf
> Of Maiko Langelaar
> Sent: Tuesday, February 10, 2015 11:53 AM
> To: TAPR xNOS Mailing List
> Subject: [nos-bbs] linFBB outgoing compressed fwd to JNOS - a discovery
> I have had people trying to forward to JNOS from linFBB for quite some
> time, and in one case we've seen consistent protocol errors, and I've
> even gone to the extreme of doing hexdumps of tcp traces right down to
> the SOH, STX, and ETX, and up till now I always thought data corruption
> on the part of linFBB ...
> BUT, now I see that using 'N 1' in forward.sys seems to fix the issue,
> it is indeed doing FBB forwarding on my test systems here. So then I go
> back to the FBB documentation, and I never realized that 'N n' can have
> multiple values, the default obviously not compatible with JNOS.
>    N (number)
>     Assigns the standard forward protocol (MBL/RLI) for the specified BBS.
>      1 = FBB forwarding allowed
>      2 = FBB+BIN forwarding
>      4 = FBB+BIN+Resume
>      8 = XFWD
>      Ex: N 15 = Sum of all protocols (default)
> I know some people use 'N 0' for text only forwarding which works, but it
> would seem on my test linFBB if I use 'N 1', then FBB forwarding is
> working
> properly. I'm guessing the systems failing to forward (FBB) with JNOS are
> those that have no 'N n' entry in their forward.sys or are not using 0 or
> 1.
> Give it a try please folks, and let me know how it goes.
> Maiko
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