[Xastir] Position data from Xastir not accepted by Yaesu FTM-400 or Direwolf
Tom Henderson
Tom at Henderson4.us
Tue Oct 23 13:57:48 PDT 2018
OK, that explains what a third party packet is. What I still don't
understated s why xastir is generating a third party packet as its
beacon, and a malformed one at that. Is anyone else experiencing this
from the beacons xastir transmits?
Tom Henderson
On 10/23/18 3:17 PM, Jason KG4WSV wrote:
> On Tue, Oct 23, 2018 at 2:44 PM Tom Henderson <Tom at henderson4.us> wrote:
>
>> Can you explain what you mean by "third party packet?"
> Short answer, it's packet that's embedded in another packet. Usually
> (only?) seen on-air when an Igate takes a packet from the network and
> transmits over RF.
>
> from http://www.aprs.org/APRS-docs/PROTOCOL.TXT :
>
> THIRD PARTY FORMAT: One special format character } allows any APRS
> packet to be carried or transmitted by any other station. This is
> what allows the both the ZIPLAN and IGATE messaging capability! On
> receipt of a 3rd party packet, the original header is dropped and the
> packet is recursively parsed again, beginning at the {. To show that
> it has been carried by another station, the call of that station is
> extracted from the as-received header and inserted as a pseudo digi*
> in the digi path. Example:
> W3XYZ>APRS,DIGI*:}W4ABC>APRS,WIDE:>121234zStatus
> will be processed as W4ABC>APRS,WIDE,W3XYZ,DIGI*:>121234zStatus
> Notice how the "carrying station" W3XYZ is inserted as if it had been
> a digi in the path
>
>
> also see
>
> http://www.aprs-is.net/IGating.aspx
>
> http://www.aprs-is.net/IGateDetails.aspx
>
>
> -Jason
> kg4wsv
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