![Guy Harris](/assets/img/avatar_default.png)
that cf_read_frame() and cf_read_frame_r() pop up an alert box on an error, its callers no longer do so). svn path=/trunk/; revision=33792
332 lines
8.8 KiB
C
332 lines
8.8 KiB
C
/* proto_hier_stats.c
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* Routines for calculating statistics based on protocol.
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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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 <stdio.h>
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#include "globals.h"
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#include "proto_hier_stats.h"
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#include "progress_dlg.h"
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#include <epan/epan_dissect.h>
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#include <wtap.h>
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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/* Update the progress bar this many times when scanning the packet list. */
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#define N_PROGBAR_UPDATES 100
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#define STAT_NODE_STATS(n) ((ph_stats_node_t*)(n)->data)
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#define STAT_NODE_HFINFO(n) (STAT_NODE_STATS(n)->hfinfo)
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static GNode*
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find_stat_node(GNode *parent_stat_node, header_field_info *needle_hfinfo)
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{
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GNode *needle_stat_node;
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header_field_info *hfinfo;
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ph_stats_node_t *stats;
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needle_stat_node = g_node_first_child(parent_stat_node);
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while (needle_stat_node) {
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hfinfo = STAT_NODE_HFINFO(needle_stat_node);
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if (hfinfo && hfinfo->id == needle_hfinfo->id) {
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return needle_stat_node;
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}
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needle_stat_node = g_node_next_sibling(needle_stat_node);
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}
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/* None found. Create one. */
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stats = g_new(ph_stats_node_t, 1);
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/* Intialize counters */
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stats->hfinfo = needle_hfinfo;
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stats->num_pkts_total = 0;
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stats->num_pkts_last = 0;
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stats->num_bytes_total = 0;
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stats->num_bytes_last = 0;
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needle_stat_node = g_node_new(stats);
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g_node_append(parent_stat_node, needle_stat_node);
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return needle_stat_node;
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}
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static void
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process_node(proto_node *ptree_node, GNode *parent_stat_node, ph_stats_t *ps, guint pkt_len)
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{
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field_info *finfo;
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ph_stats_node_t *stats;
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proto_node *proto_sibling_node;
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GNode *stat_node;
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finfo = PNODE_FINFO(ptree_node);
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/* We don't fake protocol nodes we expect them to have a field_info */
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g_assert(finfo && "dissection with faked proto tree?");
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/* If the field info isn't related to a protocol but to a field,
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* don't count them, as they don't belong to any protocol.
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* (happens e.g. for toplevel tree item of desegmentation "[Reassembled TCP Segments]") */
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if (finfo->hfinfo->parent != -1) {
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/* Skip this element, use parent status node */
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stat_node = parent_stat_node;
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stats = STAT_NODE_STATS(stat_node);
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} else {
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stat_node = find_stat_node(parent_stat_node, finfo->hfinfo);
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stats = STAT_NODE_STATS(stat_node);
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stats->num_pkts_total++;
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stats->num_bytes_total += pkt_len;
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}
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proto_sibling_node = ptree_node->next;
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if (proto_sibling_node) {
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/* If the name does not exist for this proto_sibling_node, then it is
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* not a normal protocol in the top-level tree. It was instead
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* added as a normal tree such as IPv6's Hop-by-hop Option Header and
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* should be skipped when creating the protocol hierarchy display. */
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if(strlen(PNODE_FINFO(proto_sibling_node)->hfinfo->name) == 0 && ptree_node->next)
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proto_sibling_node = proto_sibling_node->next;
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process_node(proto_sibling_node, stat_node, ps, pkt_len);
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} else {
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stats->num_pkts_last++;
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stats->num_bytes_last += pkt_len;
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}
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}
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static void
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process_tree(proto_tree *protocol_tree, ph_stats_t* ps, guint pkt_len)
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{
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proto_node *ptree_node;
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ptree_node = ((proto_node *)protocol_tree)->first_child;
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if (!ptree_node) {
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return;
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}
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process_node(ptree_node, ps->stats_tree, ps, pkt_len);
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}
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static gboolean
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process_frame(frame_data *frame, column_info *cinfo, ph_stats_t* ps)
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{
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epan_dissect_t edt;
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union wtap_pseudo_header phdr;
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guint8 pd[WTAP_MAX_PACKET_SIZE];
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double cur_time;
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/* Load the frame from the capture file */
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if (!cf_read_frame_r(&cfile, frame, &phdr, pd))
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return FALSE; /* failure */
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/* Dissect the frame tree not visible */
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epan_dissect_init(&edt, TRUE, FALSE);
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/* Don't fake protocols. We need them for the protocol hierarchy */
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epan_dissect_fake_protocols(&edt, FALSE);
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epan_dissect_run(&edt, &phdr, pd, frame, cinfo);
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/* Get stats from this protocol tree */
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process_tree(edt.tree, ps, frame->pkt_len);
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/* Update times */
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cur_time = nstime_to_sec(&frame->abs_ts);
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if (cur_time < ps->first_time) {
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ps->first_time = cur_time;
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}
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if (cur_time > ps->last_time){
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ps->last_time = cur_time;
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}
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/* Free our memory. */
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epan_dissect_cleanup(&edt);
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return TRUE; /* success */
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}
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ph_stats_t*
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ph_stats_new(void)
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{
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ph_stats_t *ps;
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frame_data *frame;
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guint tot_packets, tot_bytes;
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progdlg_t *progbar = NULL;
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gboolean stop_flag;
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int count;
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float progbar_val;
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GTimeVal start_time;
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gchar status_str[100];
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int progbar_nextstep;
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int progbar_quantum;
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/* Initialize the data */
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ps = g_new(ph_stats_t, 1);
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ps->tot_packets = 0;
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ps->tot_bytes = 0;
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ps->stats_tree = g_node_new(NULL);
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ps->first_time = 0.0;
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ps->last_time = 0.0;
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/* Update the progress bar when it gets to this value. */
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progbar_nextstep = 0;
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/* When we reach the value that triggers a progress bar update,
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bump that value by this amount. */
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progbar_quantum = cfile.count/N_PROGBAR_UPDATES;
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/* Count of packets at which we've looked. */
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count = 0;
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/* Progress so far. */
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progbar_val = 0.0f;
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stop_flag = FALSE;
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g_get_current_time(&start_time);
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tot_packets = 0;
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tot_bytes = 0;
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for (frame = cfile.plist_start; frame != NULL; frame = frame->next) {
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/* Create the progress bar if necessary.
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We check on every iteration of the loop, so that
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it takes no longer than the standard time to create
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it (otherwise, for a large file, we might take
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considerably longer than that standard time in order
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to get to the next progress bar step). */
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if (progbar == NULL)
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progbar = delayed_create_progress_dlg(
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"Computing", "protocol hierarchy statistics",
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TRUE, &stop_flag, &start_time, progbar_val);
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/* Update the progress bar, but do it only N_PROGBAR_UPDATES
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times; when we update it, we have to run the GTK+ main
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loop to get it to repaint what's pending, and doing so
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may involve an "ioctl()" to see if there's any pending
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input from an X server, and doing that for every packet
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can be costly, especially on a big file. */
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if (count >= progbar_nextstep) {
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/* let's not divide by zero. I should never be started
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* with count == 0, so let's assert that
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*/
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g_assert(cfile.count > 0);
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progbar_val = (gfloat) count / cfile.count;
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if (progbar != NULL) {
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g_snprintf(status_str, sizeof(status_str),
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"%4u of %u frames", count, cfile.count);
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update_progress_dlg(progbar, progbar_val, status_str);
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}
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progbar_nextstep += progbar_quantum;
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}
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if (stop_flag) {
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/* Well, the user decided to abort the statistics.
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computation process Just stop. */
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break;
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}
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/* Skip frames that are hidden due to the display filter.
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XXX - should the progress bar count only packets that
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passed the display filter? If so, it should
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probably do so for other loops (see "file.c") that
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look only at those packets. */
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if (frame->flags.passed_dfilter) {
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if (tot_packets == 0) {
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double cur_time = nstime_to_sec(&frame->abs_ts);
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ps->first_time = cur_time;
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ps->last_time = cur_time;
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}
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/* we don't care about colinfo */
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if (!process_frame(frame, NULL, ps)) {
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/*
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* Give up, and set "stop_flag" so we
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* just abort rather than popping up
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* the statistics window.
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*/
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stop_flag = TRUE;
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break;
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}
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tot_packets++;
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tot_bytes += frame->pkt_len;
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}
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count++;
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}
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/* We're done calculating the statistics; destroy the progress bar
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if it was created. */
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if (progbar != NULL)
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destroy_progress_dlg(progbar);
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if (stop_flag) {
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/*
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* We quit in the middle; throw away the statistics
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* and return NULL, so our caller doesn't pop up a
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* window with the incomplete statistics.
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*/
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ph_stats_free(ps);
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return NULL;
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}
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ps->tot_packets = tot_packets;
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ps->tot_bytes = tot_bytes;
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return ps;
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}
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static gboolean
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stat_node_free(GNode *node, gpointer data _U_)
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{
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ph_stats_node_t *stats = (ph_stats_node_t *)node->data;
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if (stats) {
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g_free(stats);
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}
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return FALSE;
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}
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void
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ph_stats_free(ph_stats_t *ps)
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{
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if (ps->stats_tree) {
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g_node_traverse(ps->stats_tree, G_IN_ORDER,
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G_TRAVERSE_ALL, -1,
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stat_node_free, NULL);
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g_node_destroy(ps->stats_tree);
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}
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g_free(ps);
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}
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