If you filter string is "smb2", "dns", the reason the filter works is there is a field added to the tree with that name (typically the proto_id). There is no "col.proto == smb2" filter. Many dissectors have the proto id as the first field in their tree and that allows the filterability.
-----Original Message-----
From: Richard Sharpe <realrichardsharpe@xxxxxxxxx>
To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
Sent: Sat, Jul 1, 2017 5:02 pm
Subject: Re: [Wireshark-dev] Using col_set_str(pinfo->cinfo, COL_PROTOCOL, "some_string") but cannot filter on some_string
On Sat, Jul 1, 2017 at 1:48 PM, Michael Mann via Wireshark-dev
<wireshark-
dev@xxxxxxxxxxxxx> wrote:
> I think you're running into this:
>
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4684
What is strange is that it seems to work for some protocols. Ie, if I
search on smb2, dns, etc, it works.
I wonder what the difference is ...
>
> -----Original Message-----
> From: Richard Sharpe <
realrichardsharpe@xxxxxxxxx>
> To: Developer support list for Wireshark <wireshark-
dev@xxxxxxxxxxxxx>
> Sent: Sat, Jul 1, 2017 2:31 pm
> Subject: Re: [Wireshark-dev] Using col_set_str(pinfo->cinfo, COL_PROTOCOL,
> "some_string") but cannot filter on some_string
>
> On Sat, Jul 1, 2017 at 10:20 AM, Darien Spencer <
cusneud@xxxxxxxx> wrote: >
>> The protocol filter isn't based on the value in the protocol column. >
> Instead it's based on the value given to the protocol registration method
> 'proto_register_protocol' > Look at the example here: >
>
https://www.wireshark.org/docs/wsdg_html_chunked/ChDissectAdd.html > the
> filter will be 'foo' since the 3rd argument to this method is 'foo'. > Did
> you use 'some_string' there as well? Yeah, I just went back and made sure
> that the third argument was the same, including case, as what I used in
> col_set_str. -- Regards, Richard Sharpe (何以解憂？唯有杜康。--曹操)
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--
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)
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