Re: [Wireshark-commits] rev 53489: /trunk/epan/ /trunk/epan/dissectors/: packet-ethertype.c packet-exported_pdu.c packet-infiniband.c packet-mpls.c packet-pw-eth.c packet-sctp.c /trunk/epan/: exported_pdu.c exported_pdu.h ...

[Evan Huus <eapache () gmail com>]

On Thu, Nov 21, 2013 at 3:44 PM, Guy Harris <guy () alum mit edu> wrote:
> On Nov 21, 2013, at 12:08 PM, mmann () wireshark org wrote:
>
> > http://anonsvn.wireshark.org/viewvc/viewvc.cgi?view=rev&revision=53489
> >
> > User: mmann
> > Date: 2013/11/21 08:08 PM
> >
> > Log:
> > Remove ethertype, mpls_label and ppids from packet_info structure.
>
> > The information was converted to "proto" data within their respective dissectors strictly for use in "Decode As".
>
> "proto" data is persistent, so you're allocating a chunk of data for every packet in an Ethernet capture, for 
> example, which remains around until the capture is closed.  That might amount to a significant additional amount of 
> memory for a large capture.
>
> Perhaps what's needed here is a way for dissectors to attach arbitrary data to a packet_info structure, with the data 
> being freed when the packet_info structure is freed (for example, when the epan_dissect_t containing a packet_info 
> structure is freed).

Memory allocated in the pinfo wmem allocator (pinfo->pool) will
automatically be freed when the packet_info struct is freed. It would
be pretty easy to do an analogue of p_add_proto_data using pinfo and
this wmem pool.
___________________________________________________________________________
Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev
             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe