[aprssig] Escaping \r\n in packets for APRS-IS

[Lynn W Deffenbaugh (Mr)]

Are you sure it is your radio adding the <CR> to the packet and not the 
IGate that is receiving it? Or where do you actually see this character 
since, as you say, it is dropped by the TNC2 format required by the 
APRS-IS interface.

And further, what is the use case for needing a trailing <CR> on an APRS 
packet?

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32


On 5/8/2020 8:04 AM, Iain R. Learmonth wrote:
> Hi,
>
> I recently noticed that my Yaesu VX-8DE has been appending a 0x0d
> (carriage return) to the end of packets it sends.
>
> When I upload these packets to APRS-IS the 0x0d gets stripped because
> the server software is interpreting that as the end of line. aprsc will
> take \r, \n or \r\n quite happily and in this case it's getting \r\r\n
> at the end of the line.
>
> Was there ever a system to escape the \r and \n characters where they
> appear in the information field? Should IGates drop these, or is
> truncation the correct thing to do?
>
> Thanks,
> Iain MM0ROR.
>