164b0e4a9d
In this particular case, the code logic may ensure that the search thru the list never hits the end of the list so that a crash because of an attempt to deref a NULL pointer never happens. Issue found via msvc level 4 warning "code not reachable". svn path=/trunk/; revision=35706
199 lines
4.4 KiB
C
199 lines
4.4 KiB
C
/* megaco_stat.c
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* megaco-statistics for Wireshark
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* Copyright 2003 Lars Roland
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* Copyright 2008 Ericsson AB
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* By Balint Reczey <balint.reczey@ericsson.com>
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <string.h>
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#include <epan/packet_info.h>
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#include <epan/epan.h>
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#include <epan/value_string.h>
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#include <epan/tap.h>
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#include "epan/gcp.h"
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#include "../timestats.h"
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#include "../file.h"
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#include "../globals.h"
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#include "../stat_menu.h"
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#include "tap-megaco-common.h"
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static gboolean
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megacostat_is_duplicate_reply(const gcp_cmd_t* cmd)
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{
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switch (cmd->type) {
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GCP_CMD_REPLY_CASE
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{
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gcp_cmd_msg_t *cmd_msg;
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/* cycle through commands to find same command in the transaction */
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for (cmd_msg = cmd->trx->cmds;
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(cmd_msg != NULL) && (cmd_msg->cmd->msg->framenum != cmd->msg->framenum);
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cmd_msg = cmd_msg->next) {
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if (cmd_msg->cmd->type == cmd->type)
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return TRUE;
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}
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return FALSE;
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}
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break;
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default:
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return FALSE;
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break;
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}
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}
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static gboolean
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megacostat_had_request(const gcp_cmd_t* cmd)
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{
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switch (cmd->type) {
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GCP_CMD_REPLY_CASE
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{
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gcp_cmd_msg_t *cmd_msg;
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/* cycle through commands to find a request in the transaction */
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for (cmd_msg = cmd->trx->cmds;
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(cmd_msg != NULL) && (cmd_msg->cmd->msg->framenum != cmd->msg->framenum);
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cmd_msg = cmd_msg->next) {
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switch (cmd_msg->cmd->type) {
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GCP_CMD_REQ_CASE
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return TRUE;
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break;
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default:
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return FALSE;
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break;
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}
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}
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return FALSE;
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}
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break;
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default:
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return FALSE;
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break;
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}
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}
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int
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megacostat_packet(void *pms, packet_info *pinfo, epan_dissect_t *edt _U_, const void *pmi)
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{
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megacostat_t *ms=(megacostat_t *)pms;
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const gcp_cmd_t *mi=(const gcp_cmd_t*)pmi;
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nstime_t delta;
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int ret = 0;
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switch (mi->type) {
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GCP_CMD_REQ_CASE
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if(!mi->trx->initial) {
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/* Track Context is probably disabled, we cannot
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* measure service response time */
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return 0;
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}
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else if(mi->trx->initial->framenum != mi->msg->framenum){
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/* Duplicate is ignored */
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ms->req_dup_num++;
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}
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else {
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ms->open_req_num++;
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}
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break;
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GCP_CMD_REPLY_CASE
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if(megacostat_is_duplicate_reply(mi)){
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/* Duplicate is ignored */
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ms->rsp_dup_num++;
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}
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else if (!megacostat_had_request(mi)) {
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/* no request was seen */
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ms->disc_rsp_num++;
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}
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else {
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ms->open_req_num--;
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/* calculate time delta between request and response */
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nstime_delta(&delta, &pinfo->fd->abs_ts, &mi->trx->initial->time);
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switch(mi->type) {
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case GCP_CMD_ADD_REPLY:
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time_stat_update(&(ms->rtd[0]),&delta, pinfo);
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break;
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case GCP_CMD_MOVE_REPLY:
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time_stat_update(&(ms->rtd[1]),&delta, pinfo);
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break;
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case GCP_CMD_MOD_REPLY:
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time_stat_update(&(ms->rtd[2]),&delta, pinfo);
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break;
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case GCP_CMD_SUB_REPLY:
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time_stat_update(&(ms->rtd[3]),&delta, pinfo);
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break;
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case GCP_CMD_AUDITCAP_REPLY:
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time_stat_update(&(ms->rtd[4]),&delta, pinfo);
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break;
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case GCP_CMD_AUDITVAL_REPLY:
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time_stat_update(&(ms->rtd[5]),&delta, pinfo);
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break;
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case GCP_CMD_NOTIFY_REPLY:
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time_stat_update(&(ms->rtd[6]),&delta, pinfo);
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break;
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case GCP_CMD_SVCCHG_REPLY:
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time_stat_update(&(ms->rtd[7]),&delta, pinfo);
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break;
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case GCP_CMD_TOPOLOGY_REPLY:
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time_stat_update(&(ms->rtd[8]),&delta, pinfo);
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break;
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case GCP_CMD_REPLY:
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time_stat_update(&(ms->rtd[9]),&delta, pinfo);
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break;
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default:
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time_stat_update(&(ms->rtd[11]),&delta, pinfo);
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}
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time_stat_update(&(ms->rtd[10]),&delta, pinfo);
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ret = 1;
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}
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break;
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default:
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break;
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}
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return ret;
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}
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