On Tue, Oct 23, 2018 at 2:44 PM Tom Henderson <[email protected]> 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 _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
