AX.25 Linux Packet Forwarding

AX.25 Linux Packet Forwarding

[Paul R. Tagliamonte]

Hello, Linux HAMs,

I'm just getting into AX.25, and I've not been able to find the right
set of keywords to search for. I've only started learning about this
two days ago, so pointing me to the right docs would be very welcome
and helpful in this case.

I've got a base station and a Kenwood handheld that I've got working
with AX.25. I have a BBS I can hit via my base station, but not my
handheld.

I'd like to set up my Linux box attached to my base station to forward
AX.25 traffic on-frequency as a relay.

HT: "K3XEC-1" (Kenwood)
Base Station: "MYRELAY" (Yaesu)
Remote Station: "MYBBS"

Assuming MYRELAY and MYBBS are valid callsigns / stations -- I'm going
to use these so that we don't get confused by the same callsign but
different SSIDs.

I'd like to be able to (from my Laptop and Kenwood) do (as K3XEC-1):

$ axcall MYBBS via MYRELAY

which would result in MYRELAY sending traffic K3XEC-2>MYBBS, and
relaying traffic back to K3XEC-2 (or something) back via
MYRELAY>K3XEC-1 (or however it should be properly translated - still
not comfortable with the AX.25 framing yet or if there's a convention
there), and have my base-station relay traffic to and from.

Is there something like "net.ipv4.ip_forward" but for AX.25 that would
allow me to do this? Or a daemon or something? I'd love to allow
anyone else nearby to use my base station, so filtering by callsign is
not required here either.

I /think/ I subscribed, but please do keep me on CC in the event I fudged up.

  Paul K3XEC

--
:wq

Re: AX.25 Linux Packet Forwarding

[Dennis Boone]

 > I'd like to set up my Linux box attached to my base station to
 > forward AX.25 traffic on-frequency as a relay.

 > HT: "K3XEC-1" (Kenwood)
 > Base Station: "MYRELAY" (Yaesu)
 > Remote Station: "MYBBS"

The linux stack doesn't digipeat on its own.  There are a couple of
variants of a digi program that will add the needful.  One such is:

https://github.com/iddq/axdigi2018

All of them seem to be updates of Craig Small's original axdigi tool.

De

Re: AX.25 Linux Packet Forwarding

[David Ranch]

Hello Paul,

What are you using for a TNC?  If you're using Direwolf, it has a 
built-in digipeating function as well.

Ps.  net.ipv4.ip_forward is for TCP/IPv4 traffic and has nothing to do 
with AX.25 forwarding.


--David
KI6ZHD


On 03/27/2022 05:25 PM, Dennis Boone wrote:
>   > I'd like to set up my Linux box attached to my base station to
>   > forward AX.25 traffic on-frequency as a relay.
>
>   > HT: "K3XEC-1" (Kenwood)
>   > Base Station: "MYRELAY" (Yaesu)
>   > Remote Station: "MYBBS"
>
> The linux stack doesn't digipeat on its own.  There are a couple of
> variants of a digi program that will add the needful.  One such is:
>
> https://github.com/iddq/axdigi2018
>
> All of them seem to be updates of Craig Small's original axdigi tool.
>
> De

Re: AX.25 Linux Packet Forwarding

[Paul R. Tagliamonte]

Thank you Dennis and David!

I was able to get the right parts moving after picking up the phrase
"Digipeating" - I have it all working, thank you very much for your
help!

Paul K3XEC


On Sun, Mar 27, 2022 at 8:18 PM Paul R. Tagliamonte <paultag@gmail.com> wrote:
>
> Hello, Linux HAMs,
>
> I'm just getting into AX.25, and I've not been able to find the right
> set of keywords to search for. I've only started learning about this
> two days ago, so pointing me to the right docs would be very welcome
> and helpful in this case.
>
> I've got a base station and a Kenwood handheld that I've got working
> with AX.25. I have a BBS I can hit via my base station, but not my
> handheld.
>
> I'd like to set up my Linux box attached to my base station to forward
> AX.25 traffic on-frequency as a relay.
>
> HT: "K3XEC-1" (Kenwood)
> Base Station: "MYRELAY" (Yaesu)
> Remote Station: "MYBBS"
>
> Assuming MYRELAY and MYBBS are valid callsigns / stations -- I'm going
> to use these so that we don't get confused by the same callsign but
> different SSIDs.
>
> I'd like to be able to (from my Laptop and Kenwood) do (as K3XEC-1):
>
> $ axcall MYBBS via MYRELAY
>
> which would result in MYRELAY sending traffic K3XEC-2>MYBBS, and
> relaying traffic back to K3XEC-2 (or something) back via
> MYRELAY>K3XEC-1 (or however it should be properly translated - still
> not comfortable with the AX.25 framing yet or if there's a convention
> there), and have my base-station relay traffic to and from.
>
> Is there something like "net.ipv4.ip_forward" but for AX.25 that would
> allow me to do this? Or a daemon or something? I'd love to allow
> anyone else nearby to use my base station, so filtering by callsign is
> not required here either.
>
> I /think/ I subscribed, but please do keep me on CC in the event I fudged up.
>
>   Paul K3XEC
>
> --
> :wq



--
:wq