[B.A.T.M.A.N.] rv791 <---> rv824 incompatible?

[B.A.T.M.A.N.] rv791 <---> rv824 incompatible?

[tetzlav]

> root@17-21:~# batmand
> -v                                                                                                                                                    
>  
> B.A.T.M.A.N. 0.3-beta rv791 (compatibility version 4)
> root@17-21:~# batmand -cd4
> [  33051930] Received BATMAN packet via NB: 105.61.17.32, IF: eth1:bat
> 105.61.17.21 (from OG: 4.0.50.0, via old OG: 31.213.16.210, seqno
> 4384, tq 17, TTL 61, V 61, UDF 0, IDF 1)
> [  33051930] Is an internet gateway (class 105)
> [  33051930] Drop packet: incompatible batman version (61)


---
> root@17-32:~# batmand -v
> WARNING: You are using the unstable batman branch. If you are
> interested in *using* batman get the latest stable release
> !                                                   
> B.A.T.M.A.N. 0.3-beta rv824 (compatibility version 4)
> root@17.32:~# batmand -cd4
> [   7946500] Received BATMAN packet via NB: 105.61.17.21, IF: eth1:bat
> 105.61.17.32 (from OG: 0.254.113.181, via old OG: 0.4.117.105, seqno
> 26941, tq 61, TTL 18, V 105, UDF 0, IDF
> 0)                                                                                                                                                                     
>
> [   7946500] Is an internet gateway (class 1)
> [   7946510] Drop packet: incompatible batman version (105)

Regards
tetzlav

Re: [B.A.T.M.A.N.] rv791 <---> rv824 incompatible?

[Marek Lindner]

> > [   7946500] Is an internet gateway (class 1)
> > [   7946510] Drop packet: incompatible batman version (105)

In revision 812 the header format was changed due to future compability issues 
(the version field is now the first field in the header).
I'm sorry about the inconvenience -  it wont happen too often.

Greetings,
Marek

Re: [B.A.T.M.A.N.] rv791 <---> rv824 incompatible?

[tetzlav]

Marek Lindner schrieb:
>>> [   7946500] Is an internet gateway (class 1)
>>> [   7946510] Drop packet: incompatible batman version (105)
>>>       
>
> In revision 812 the header format was changed due to future compability issues 
> (the version field is now the first field in the header).
> I'm sorry about the inconvenience -  it wont happen too often.

:-/ just this minute we included batmand-0.3 rv791 in our Leipziger
Freifunk-Firmware and now the newer Versions are incompatible with this
included version...
So wie never get an big connected batman-testbed in Leipzig in near
Future, because i think the the users wont update as often as
batmand-compat change.

The rv791 routes fine, but gateway make some Problems. So we included
this testet version and only request the users that _want_ to use
batman-gateway-tunnel tu update their batmand. (updatecheck is
includet)  -> now our Plans are broken... :-(

Why you dont enlarge the compat# from 4 to 5, or so?
Thats confusing, sorry...


Regards
tetzlav

Re: [B.A.T.M.A.N.] rv791 <---> rv824 incompatible?

[Marek Lindner]

> The rv791 routes fine, but gateway make some Problems. So we included
> this testet version and only request the users that _want_ to use
> batman-gateway-tunnel tu update their batmand. (updatecheck is
> includet)  -> now our Plans are broken... :-(

Sorry about that.
We don't do it to explicitly annoy our users but to minimize future problems. 
But to do that change now than after the final release.


> Why you dont enlarge the compat# from 4 to 5, or so?
> Thats confusing, sorry...

That would not change the problem - here is why:
Before rev812 the version (compat) field was the 10th byte in the header. Now 
it is the first byte. Even if the newer versions increment their version 
field the older version will look for it at the wrong place.

If we don't have the version field at the first byte all future header changes 
may "move" the version field around (same as now). That is why we have to do 
it once and hopefully never again.

Regards,
Marek