2002-09-06 23:14:04 +00:00
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/* cfile.c
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2009-09-21 18:09:19 +00:00
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* capture_file GUI-independent manipulation
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2002-09-06 23:14:04 +00:00
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* Vassilii Khachaturov <vassilii@tarunz.org>
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*
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2004-07-18 00:24:25 +00:00
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* $Id$
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2002-09-06 23:14:04 +00:00
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*
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2006-05-21 05:12:17 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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2002-09-06 23:14:04 +00:00
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include "cfile.h"
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void
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2009-09-22 16:53:11 +00:00
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cap_file_init(capture_file *cf)
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2002-09-06 23:14:04 +00:00
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{
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/* Initialize the capture file struct */
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2011-04-25 05:33:07 +00:00
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cf->plist_start = NULL;
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cf->plist_end = NULL;
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cf->wth = NULL;
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cf->filename = NULL;
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cf->source = NULL;
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cf->user_saved = FALSE;
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cf->is_tempfile = FALSE;
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cf->rfcode = NULL;
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cf->dfilter = NULL;
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cf->has_snap = FALSE;
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cf->snap = WTAP_MAX_PACKET_SIZE;
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cf->count = 0;
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cf->last_found_num = 0;
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cf->last_found_fd = NULL;
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cf->redissecting = FALSE;
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2002-09-06 23:14:04 +00:00
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}
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2009-09-21 18:20:01 +00:00
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2009-09-22 16:39:48 +00:00
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void
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cap_file_add_fdata(capture_file *cf, frame_data *fdata)
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{
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frame_data *plist_end = cf->plist_end;
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fdata->prev = plist_end;
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if (plist_end != NULL)
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plist_end->next = fdata;
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else
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cf->plist_start = fdata;
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cf->plist_end = fdata;
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}
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2011-04-25 05:33:07 +00:00
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/*
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* Find the frame_data for the specified frame number.
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* Do some caching to make this work reasonably fast for
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* forward and backward sequential passes through the packets.
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*/
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frame_data *
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cap_file_find_fdata(capture_file *cf, guint32 num)
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{
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frame_data *fdata;
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if (num == 0) {
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/* There is no frame number 0 */
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return NULL;
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}
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/*
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* Did we remember a frame number from a sequential pass through
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* the frames?
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*/
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if (cf->last_found_num != 0) {
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/*
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* Yes. Is this that frame?
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*/
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if (num == cf->last_found_num) {
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/* Yes - return it. */
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return cf->last_found_fd;
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}
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/*
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* No. Is it the frame just after that frame?
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*/
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if (num == cf->last_found_num + 1) {
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/*
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* Yes - if there is such a frame, remember it and return it.
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*/
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fdata = cf->last_found_fd->next;
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if (fdata != NULL) {
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cf->last_found_num = num;
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cf->last_found_fd = fdata;
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}
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return fdata; /* could be null, if there is no such frame */
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}
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/*
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* No. Is it the frame just before that frame?
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*/
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if (num == cf->last_found_num - 1) {
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/*
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* Yes - if there is such a frame, remember it and return it.
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*/
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fdata = cf->last_found_fd->prev;
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if (fdata != NULL) {
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cf->last_found_num = num;
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cf->last_found_fd = fdata;
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}
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return fdata; /* could be null, if there is no such frame */
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}
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}
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for (fdata = cf->plist_start; fdata != NULL && fdata->num < num;
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fdata = fdata->next)
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;
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if (fdata != NULL) {
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cf->last_found_num = num;
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cf->last_found_fd = fdata;
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}
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return fdata;
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}
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