You can group fields in whatever way makes sense for your protocol, it doesn't always have to be flat or a "real" field (or a "real" structure). I would think that you would just call proto_tree_add_subtree() and pass it the title of <svec-list> or <request-list>. You may have to call proto_item_set_len later on the proto_item* populated by proto_tree_add_subtree() so that the bytes are correctly highlighted.
-----Original Message-----
From: Simon Zhong <szhong.jnpr@xxxxxxxxx>
To: wireshark-dev <wireshark-dev@xxxxxxxxxxxxx>
Sent: Tue, Sep 30, 2014 8:59 am
Subject: [Wireshark-dev] 'Virtual' subtree
Hi,
I'm working on PCEP dissector, I'm wonder if it's possible to create a 'virtual' subtree.
The format of a message is as follows:
<PCReq Message>::= <Common Header>
[<svec-list>]
<request-list>
where: <svec-list>::=<SVEC>[<svec-list>]
<request-list>::=<request>[<request-list>]
<request>::= <RP>
<END-POINTS>
[<LSPA>]
[<BANDWIDTH>]
[<metric-list>]
[<RRO>[<BANDWIDTH>]]
[<IRO>]
[<LOAD-BALANCING>]
...
As you can see there's no real field called <svec-list> or <request-list>, it's just set of some other real fields. But I believe it will be more clear if we can present these real fields under a 'virtual' subtree, instead of presenting them flatly.
Is there any way to do this? Thanks.
/Simon
