Logo Search packages:      
Sourcecode: wireshark version File versions

tap-h225rassrt.c

/* tap_h225rassrt.c
 * h225 RAS Service Response Time statistics for wireshark
 * Copyright 2003 Lars Roland
 *
 * $Id: tap-h225rassrt.c 18268 2006-05-31 17:38:42Z gerald $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#include <string.h>
#include "epan/packet_info.h"
#include <epan/tap.h>
#include <epan/stat_cmd_args.h>
#include "epan/value_string.h"
#include "register.h"
#include <epan/dissectors/packet-h225.h>
#include "timestats.h"

/* following values represent the size of their valuestring arrays */
#define NUM_RAS_STATS 7

static const value_string ras_message_category[] = {
  {  0,     "Gatekeeper    "},
  {  1,     "Registration  "},
  {  2,     "UnRegistration"},
  {  3,     "Admission     "},
  {  4,     "Bandwidth     "},
  {  5,     "Disengage     "},
  {  6,     "Location      "},
  {  0, NULL }
};

typedef enum _ras_type {
      RAS_REQUEST,
      RAS_CONFIRM,
      RAS_REJECT,
      RAS_OTHER
}ras_type;

typedef enum _ras_category {
      RAS_GATEKEEPER,
      RAS_REGISTRATION,
      RAS_UNREGISTRATION,
      RAS_ADMISSION,
      RAS_BANDWIDTH,
      RAS_DISENGAGE,
      RAS_LOCATION,
      RAS_OTHERS
}ras_category;

/* Summary of response-time calculations*/
typedef struct _h225_rtd_t {
      guint32 open_req_num;
      guint32 disc_rsp_num;
      guint32 req_dup_num;
      guint32 rsp_dup_num;
      timestat_t stats;
} h225_rtd_t;

/* used to keep track of the statistics for an entire program interface */
typedef struct _h225rassrt_t {
      char *filter;
      h225_rtd_t ras_rtd[NUM_RAS_STATS];
} h225rassrt_t;


static void
h225rassrt_reset(void *phs)
{
      h225rassrt_t *hs=(h225rassrt_t *)phs;
      int i;

      for(i=0;i<NUM_RAS_STATS;i++) {
            hs->ras_rtd[i].stats.num = 0;
            hs->ras_rtd[i].stats.min_num = 0;
            hs->ras_rtd[i].stats.max_num = 0;
            hs->ras_rtd[i].stats.min.secs = 0;
            hs->ras_rtd[i].stats.min.nsecs = 0;
            hs->ras_rtd[i].stats.max.secs = 0;
            hs->ras_rtd[i].stats.max.nsecs = 0;
            hs->ras_rtd[i].stats.tot.secs = 0;
            hs->ras_rtd[i].stats.tot.nsecs = 0;
            hs->ras_rtd[i].open_req_num = 0;
            hs->ras_rtd[i].disc_rsp_num = 0;
            hs->ras_rtd[i].req_dup_num = 0;
            hs->ras_rtd[i].rsp_dup_num = 0;
      }

}

static int
h225rassrt_packet(void *phs, packet_info *pinfo _U_, epan_dissect_t *edt _U_, const void *phi)
{
      h225rassrt_t *hs=(h225rassrt_t *)phs;
      const h225_packet_info *pi=phi;

      ras_type rasmsg_type = RAS_OTHER;
      ras_category rascategory = RAS_OTHERS;

      if (pi->msg_type != H225_RAS || pi->msg_tag == -1) {
            /* No RAS Message or uninitialized msg_tag -> return */
            return 0;
      }

      if (pi->msg_tag < 21) {
            /* */
            rascategory = pi->msg_tag / 3;
            rasmsg_type = pi->msg_tag % 3;
      }
      else {
            /* No SRT yet (ToDo) */
            return 0;
      }

      switch(rasmsg_type) {

      case RAS_REQUEST:
            if(pi->is_duplicate){
                  hs->ras_rtd[rascategory].req_dup_num++;
            }
            else {
                  hs->ras_rtd[rascategory].open_req_num++;
            }
            break;

      case RAS_CONFIRM:
            /* no break - delay calculation is identical for Confirm and Reject  */
      case RAS_REJECT:
            if(pi->is_duplicate){
                  /* Duplicate is ignored */
                  hs->ras_rtd[rascategory].rsp_dup_num++;
            }
            else if (!pi->request_available) {
                  /* no request was seen, ignore response  */
                  hs->ras_rtd[rascategory].disc_rsp_num++;
            }
            else {
                  hs->ras_rtd[rascategory].open_req_num--;
                  time_stat_update(&(hs->ras_rtd[rascategory].stats),&(pi->delta_time), pinfo);
            }
            break;

      default:
            return 0;
            break;
      }
      return 1;
}

static void
h225rassrt_draw(void *phs)
{
      h225rassrt_t *hs=(h225rassrt_t *)phs;
      int i;
      timestat_t *rtd_temp;

      printf("======================================== H225 RAS Service Response Time ========================================\n");
      printf("H225 RAS Service Response Time (SRT) Statistics:\n");
      printf("RAS-Messages   | Measurements |     Min SRT    |     Max SRT    |     Avg SRT    | Min in Frame | Max in Frame |\n");
      for(i=0;i<NUM_RAS_STATS;i++) {
            rtd_temp = &(hs->ras_rtd[i].stats);
            if(rtd_temp->num){
                  printf("%s | %10u   | %9.2f msec | %9.2f msec | %9.2f msec |  %10u  |  %10u  |\n",
                        val_to_str(i,ras_message_category,"Unknown       "),rtd_temp->num,
                        nstime_to_msec(&(rtd_temp->min)), nstime_to_msec(&(rtd_temp->max)),
                        get_average(&(rtd_temp->tot), rtd_temp->num),
                        rtd_temp->min_num, rtd_temp->max_num
                  );
            }
      }
        printf("================================================================================================================\n");
      printf("RAS-Messages   |   Open REQ   |  Discarded RSP  |   Repeated REQ  |   Repeated RSP  |\n");
      for(i=0;i<NUM_RAS_STATS;i++) {
            rtd_temp = &(hs->ras_rtd[i].stats);
            if(rtd_temp->num){
                  printf("%s | %10u   |    %10u   |    %10u   |    %10u   |\n",
                        val_to_str(i,ras_message_category,"Unknown       "),
                        hs->ras_rtd[i].open_req_num, hs->ras_rtd[i].disc_rsp_num,
                        hs->ras_rtd[i].req_dup_num, hs->ras_rtd[i].rsp_dup_num
                  );
            }
      }
      printf("================================================================================================================\n");

}


static void
h225rassrt_init(const char *optarg, void* userdata _U_)
{
      h225rassrt_t *hs;
      const char *filter=NULL;
      GString *error_string;

      if(!strncmp(optarg,"h225,srt,",9)){
            filter=optarg+9;
      } else {
            filter="";
      }

      hs = g_malloc(sizeof(h225rassrt_t));
      hs->filter=g_malloc(strlen(filter)+1);
      strcpy(hs->filter, filter);

      h225rassrt_reset(hs);

      error_string=register_tap_listener("h225", hs, filter, NULL, h225rassrt_packet, h225rassrt_draw);
      if(error_string){
            /* error, we failed to attach to the tap. clean up */
            g_free(hs->filter);
            g_free(hs);

            fprintf(stderr, "tshark: Couldn't register h225,srt tap: %s\n",
                error_string->str);
            g_string_free(error_string, TRUE);
            exit(1);
      }
}


void
register_tap_listener_h225rassrt(void)
{
      register_stat_cmd_arg("h225,srt", h225rassrt_init,NULL);
}

Generated by  Doxygen 1.6.0   Back to index