Maksim Salau authored Jan 09, 2019 and AndersBroman committed Jan 13, 2019

The change adds support of CAN flags stored in ids.
The flags allow dissectors to distinguish error frames,
remote transmission request frames and identify id type used (either
standard 11-bit or extended 29-bit).

Addition of bit flags allowed to add more checks whether a CAN frame may
be decoded by a particular dissector. I.e. some dissectors work only
with 11-bit ids (CANopen, DeviceNet) some only with 29-bit (J1939,
ISObus), others should be fine with bot types (OBD-II, ISO 15765).

The change also fixes 2 bugs in the DeviceNet dissector:
* removed byte swapping of CAN id (the pcap file seems to be broken;
  verified dissector operation with random traffic generated by cangen)
* fixed "Warn Dissector bug, protocol DeviceNet, in packet N":
  added a default value for fragmented message type string value lookup.

Bug: 15418
Change-Id: I70e91130789bb3367fe19e51489cd34e97d678a6
Reviewed-on: https://code.wireshark.org/review/31471


Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>