As..." code path.
Extract the code for the "do you want to overwrite this file" and "OK,
you do - are you aware it's {user-immutable, read-only}?" code paths
into a common routine for use by both of those and, potentially, other
save/export/etc. code paths in the future.
For "Save As", allow us to save atop the current capture file, as that's
just what "Save" does if there are unsaved changes, and "safe save"
makes that work. *Don't* allow that for "Export Selected Packets
As...", however.
The file chooser is run as a modal dialog, so we don't need to worry
about creating more than one of them or about the number of marked
packets etc. being changed out from under us. Get rid of a bunch of
static variables.
svn path=/trunk/; revision=43060
make Save-As/Displayed/All-Packets save not only the displayed packets but
also any other packets needed (e.g., for reassembly) to fully dissect the
displayed packets.
This works only for the "All packets" case; choosing only the Selected packet,
the Marked packets, or a range of packets would require actually storing which
packets depend on which (too much memory) or going through the packet list many
times (too slow). Also, this behavior is always the case: you can't save the
displayed packets without their dependencies (I don't see why this would be
desirable).
So far this is done for SCTP and things using the reassembly routines (TCP has
been tested).
The Win32 dialog was modified but hasn't been tested yet.
One confusing aspect of the UI is that the Displayed count in the Save-As
dialog does not match the number of displayed packets. (I tried renaming the
button "Displayed + Dependencies" but it looked too big.) The tooltip tries
to explain this and the fact that this works only in the All-Packets case;
suggestions for improvement are welcome.
Implementation details:
Dissectors (or the reassembly code) can list frames which were needed to
build the current frame's tree. If the current frame passes the display
filter then each listed frame is marked as "depended upon" (this takes up the
last free frame_data flag).
When performing a Save-As/Displayed/All-Packets then choose packets which
passed the dfilter _or_ are depended upon.
svn path=/trunk/; revision=41216
Jakub Zawadzki