Re: Chained CAN dissecector: Can not get reference for CAN dissector

[Sebastian Schildt <sebastian () frozenlight de>]

Hi,

I made a patch calling register_dissector for CAN (https://code.wireshark.org/review/#/c/12780/). Actually it was quite 
easy, 30% of the time was needed to make Wireshark build at all, 2% to make and test the patch and the rest to get this 
gerrit thingy running :D

If/when it gets applied all that is needed to get a reference to the CAN dissector is

original_can_dissector = Dissector.get("can")

However, for the benefit of people just googling it, if the patch is not accepted or you are using a stable version of 
Wireshark, this is a workaround for Lua:

local WTAP_ENCAP_SOCKETCAN = 125      --from wtap.h
wtap_tbl=DissectorTable.get("wtap_encap")
original_can_dissector = wtap_tbl:get_dissector(WTAP_ENCAP_SOCKETCAN)


Sebastian 

> Am 15.12.2015 um 12:25 schrieb Pascal Quantin <pascal.quantin () gmail com>:
>
>
>
>
> Hi Sebastian,
>
> The CAN dissector does not register itself by name (no call to register_dissector() function), so as you noticed you 
> will not find it on the list.
> The best way to move forward would be be to contribute to Wireshark so as to add the missing register_dissector 
> function call. But it will be only added to the development tree (Wireshark 2.1) and not backported to stable 
> releases as I do not think it will be considered as a fix, but an enhancement.
>
> Regards,
> Pascal.
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