Bug#783160: ax25-tools: The most part of IP-over-AX25 outbound packets (e.g. ICMP requests) are sent duplicated

[Thomas Osterried <thomas@osterried.de>]

Hello,

if you connect a TNC via serial interface, you use the userspace
kissattach program to bind the kernel-serial-interface to the 
kernel-kiss-driver (and behind, the kernel-ax25 stack).
kissattach does not make more than tying together the filedescriptors 
the kernel serial/kiss stacks.
After that, Userspace programs / libraries are  not involved anymore
(kissattach only links the fd to the kernel and does not do any
read()/write()-operations).

Thus, it's a kernel-ax25 problem. I hope, Ralf dl5rb could tell more 
about.


I remember we've observed that (or something comparable like that) years
ago (at db0fhn, iirc on debian squeeze), where packets sent out of order
and / or duplicated. I also have seen datagram packets (UI) with a
payload size larger than 256 bytes. At db0fhn, we stopped IP-Mode-DG for
various reasons. 

Some information about the described problem is missing: Do you use
IP-Mode-VC (IP over connected-AX.25) or IP-Mode-DG (IP over UI-Frames)?

Also, it would help for debuging, to get your configuration of
/proc/sys/net/ax25/<ifname>/*

vy 73,
        - Thomas  dl9sau