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[aprssig] OpenAPRS has assumed "EMAIL" alias(was UniversalMessaging)

Gregory A. Carter gcarter at openaprs.net
Fri Nov 7 19:13:03 UTC 2008


Right now OpenAPRS is faking the APRS message back as the alias they used,
so if they sent the message to EMAIL it gets acked from EMAIL or E
respectively.  I need to add N6NAR in the path to make the message is
tracable back to us still but that should be done by Saturday.

Greg

NV6G
OpenAPRS.Net

On Fri, Nov 7, 2008 at 10:35 AM, Robert Bruninga <bruninga at usna.edu> wrote:

> Thanks Pete,
>
> > Be advised that... many APRS-IS servers and
> > APRS clients consider callsigns that are less
> > than 3 characters to be invalid.
>
> Yes, even APRSdos ignores AX.25 packets with less than 3 letter
> calls.
>
> > Also, a problem seen with the Sprouls' email
> > server early on (I think they fixed this) was
> > that it would ack back using a callsign
> > instead of EMAIL causing confusion with many
> > clients.
>
> Lemme think about this... Help me remember...
>
> Sending:
> WB4APR>APRS::EMAIL....:message...{line#
>
> Expected response:
> WU2Z>APRS::WB4APR....:ackline#
>
> Many clients would not recognize this as an ACK because the
> SENDING callsign (WU2Z) did not match the outgoing callsign
> (EMAIL).  So, there were 3 possible fixes...:
>
> 1) If the ACK was from WU2Z, then accept the ack
> 2) If the line number matched ANY outgoing message, then accept
> it?
> 3) Have WU2Z fake a "EMAIL>APRS::WB4APR...:ackline#"
>
> I think we ended up loosening up the line-number match algorithm
> and adopted #2.  If #1 is hardcoded in any systems, then that is
> a problem.
> If the fix was #3, then that is a problem at the AX.25 level as
> Pete raises.  Pete, can you confirm that if the fix was #2, that
> then nothing in in the APRS-IS would care about a "message"
> addressee (though they do care about AX.25 addresses)?.
>
> Thanks
> Bob, WB4APR
>
> > Things to consider when looking at doing short callsigns
> > and/or callsign substitution with server applications.
> >
> > 73,
> >
> > Pete Loveall AE5PL
> > pete at ae5pl dot net
>
>
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