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Implements V2X protocol dissectors:
* Geonetworking (network layer):
Dissector is registered on top of Ethernet (ethertype=0x8947). Secured
Packets are dissected up to the basic header, the rest is shown as data.
GN_ADDR address type is registerd and provides resolution of station
type and country code in the address. MID is shown as an ethernet address.
All the fields are dissected for non Secured Packets.
A subdissector table named "geonw.ch.nh" is provided on the next header
field. IPv6 is automatically registered. Heuristic dissectors is not
supported. If no dissector is foundd, payload is shown as data.
A preference boolean allows to enable/disable sequence number checking.
Tap "geonw" gets headers of all packets (with most fields).
Expert info tests if and provide feedback on:
- version is zero (no other version possible),
- reserved fields are zeros,
- payload_len matching with reported length of buffer,
- Remaining Hop Limit is 1 for Beacon and SHB,
- low RHL or RHL > Max Hop Limit,
- country code is less than 999 (3 digits ITU-T E.164),
- latitude, longitude, heading and angle limits,
- (suspected) duplicate packets,
- LS_REQUEST/LS_REPLY matching.
* Basic Transport Portocol:
BTP-X (X=A or B) dissectors are registered on top of Geonetworking.
Subdissector tables "btpx.port" allow to register for a given port,
while heuristic dissector can register to "btpx.payload". Decode as
capability is supported.
"btpx" taps get headers of all packets with ports/@ infos.
"btpx_follow" taps get the payload.
Bug: 15148
Change-Id: Iab5f4486d4c38068d9ad4361e77296b747f9b1bb
Reviewed-on: https://code.wireshark.org/review/30992
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
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