BUGs into libax25

["DL5DI" <dl5di@xxxxxxxx>]

This special event station callsign that we sometimes find like
DQ2008ANYEVENT will never work in packet radio.
The protocol header of ax25 frames only allows 6 bytes of callsign and 1
halfbyte of SSID.
Not only for the destiantion, also for all digipeaters inbetween.
We would need to change the whole protocol and all digipeaters and stations
using it worldwide to get that covered.
I expect that packet radio will be dead before that happens. :-)

73 de Hans, DL5DI

> -----Ursprüngliche Nachricht-----
> Von: linux-hams-owner@xxxxxxxxxxxxxxx 
> [mailto:linux-hams-owner@xxxxxxxxxxxxxxx] Im Auftrag von Ralf Baechle 
> DL5RB
> Gesendet: Montag, 2. Juni 2008 11:16
> An: Mike McCarthy, W1NR
> Cc: Bernard Pidoux; linux-hams; Ray Wells; Charlie k4gbb; Jerry 
> DeLong; F1TE; f8arr
> Betreff: Re: BUGs into libax25
> 
> On Sun, Jun 01, 2008 at 10:14:54PM -0400, Mike McCarthy, W1NR wrote:
> 
> > As I recall, there is a limit to the size of a callsign in
> the AX.25
> > protocol specification.  Will changing it create an incompatibility 
> > with standard TNC protocol stacks?
> 
> Afaik the currently only user of 6-letter callsigns aside of special 
> event stations are Australien foundation license which look like 
> VK3FABC so 4-letter suffix and those are not permitted to use packet 
> radio anyway.
> I was wondering if Swaziland which only has a half-series assignment 
> is possibly using 3+3 calls.
> 
> Anyway, the maximum callsign length in the AX.25 spec is 6 characters 
> and (I looked into that ...) there is no way of extending that without 
> causing large scale software breakage :-(  It's almost like 
> retrofitting 128-bit addresses into
> IPv4 - it took a new protocol.
> 
>   Ralf
> --
> To unsubscribe from this list: send the line "unsubscribe linux-hams" 
> in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo 
> info at http://vger.kernel.org/majordomo-info.html
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-hams" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html