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tap-mgcpstat.c

/* tap-mgcpstat.c
 * mgcpstat   2003 Lars Roland
 *
 * $Id: tap-mgcpstat.c 28645 2009-06-05 22:42:47Z guy $
 *
 * 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-mgcp.h"
#include "timestats.h"

#define NUM_TIMESTATS 11

/* used to keep track of the statistics for an entire program interface */
typedef struct _mgcpstat_t {
      char *filter;
        timestat_t rtd[NUM_TIMESTATS];
      guint32 open_req_num;
      guint32 disc_rsp_num;
      guint32 req_dup_num;
      guint32 rsp_dup_num;
} mgcpstat_t;

static const value_string mgcp_mesage_type[] = {
  {  0,     "Overall"},
  {  1,     "EPCF   "},
  {  2,     "CRCX   "},
  {  3,     "MDCX   "},
  {  4,     "DLCX   "},
  {  5,     "RQNT   "},
  {  6,     "NTFY   "},
  {  7,     "AUEP   "},
  {  8, "AUCX   "},
  {  9, "RSIP   "},
  {  0, NULL}
};

static int
mgcpstat_packet(void *pms, packet_info *pinfo, epan_dissect_t *edt _U_, const void *pmi)
{
      mgcpstat_t *ms=(mgcpstat_t *)pms;
      const mgcp_info_t *mi=pmi;
      nstime_t delta;
      int ret = 0;

      switch (mi->mgcp_type) {

      case MGCP_REQUEST:
            if(mi->is_duplicate){
                  /* Duplicate is ignored */
                  ms->req_dup_num++;
            }
            else {
                  ms->open_req_num++;
            }
            break;

      case MGCP_RESPONSE:
            if(mi->is_duplicate){
                  /* Duplicate is ignored */
                  ms->rsp_dup_num++;
            }
            else if (!mi->request_available) {
                  /* no request was seen */
                  ms->disc_rsp_num++;
            }
            else {
                  ms->open_req_num--;
                  /* calculate time delta between request and response */
                  nstime_delta(&delta, &pinfo->fd->abs_ts, &mi->req_time);

                  time_stat_update(&(ms->rtd[0]),&delta, pinfo);

                  if (g_ascii_strncasecmp(mi->code, "EPCF", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[1]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "CRCX", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[2]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "MDCX", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[3]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "DLCX", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[4]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "RQNT", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[5]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "NTFY", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[6]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "AUEP", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[7]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "AUCX", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[8]),&delta, pinfo);
                  }
                  else if (g_ascii_strncasecmp(mi->code, "RSIP", 4) == 0 ) {
                        time_stat_update(&(ms->rtd[9]),&delta, pinfo);
                  }
                  else {
                        time_stat_update(&(ms->rtd[10]),&delta, pinfo);
                  }

                  ret = 1;
            }
            break;

      default:
            break;
      }

      return ret;
}

static void
mgcpstat_draw(void *pms)
{
      mgcpstat_t *ms=(mgcpstat_t *)pms;
      int i;

      /* printing results */
      printf("\n");
      printf("=====================================================================================================\n");
      printf("MGCP Response Time Delay (RTD) Statistics:\n");
      printf("Filter for statistics: %s\n",ms->filter?ms->filter:"");
        printf("Duplicate requests: %u\n",ms->req_dup_num);
        printf("Duplicate responses: %u\n",ms->rsp_dup_num);
        printf("Open requests: %u\n",ms->open_req_num);
        printf("Discarded responses: %u\n",ms->disc_rsp_num);
        printf("Type    | Messages   |    Min RTD    |    Max RTD    |    Avg RTD    | Min in Frame | Max in Frame |\n");
        for(i=0;i<NUM_TIMESTATS;i++) {
            if(ms->rtd[i].num) {
                  printf("%s | %7u    | %8.2f msec | %8.2f msec | %8.2f msec |  %10u  |  %10u  |\n",
                        val_to_str(i,mgcp_mesage_type,"Other  "),ms->rtd[i].num,
                        nstime_to_msec(&(ms->rtd[i].min)), nstime_to_msec(&(ms->rtd[i].max)),
                        get_average(&(ms->rtd[i].tot), ms->rtd[i].num),
                        ms->rtd[i].min_num, ms->rtd[i].max_num
                  );
            }
      }
        printf("=====================================================================================================\n");
}


static void
mgcpstat_init(const char *optarg, void* userdata _U_)
{
      mgcpstat_t *ms;
      int i;
      GString *error_string;

      ms=g_malloc(sizeof(mgcpstat_t));
      if(!strncmp(optarg,"mgcp,rtd,",9)){
            ms->filter=g_strdup(optarg+9);
      } else {
            ms->filter=NULL;
      }

      for(i=0;i<NUM_TIMESTATS;i++) {
            ms->rtd[i].num=0;
            ms->rtd[i].min_num=0;
            ms->rtd[i].max_num=0;
            ms->rtd[i].min.secs=0;
            ms->rtd[i].min.nsecs=0;
            ms->rtd[i].max.secs=0;
            ms->rtd[i].max.nsecs=0;
            ms->rtd[i].tot.secs=0;
            ms->rtd[i].tot.nsecs=0;
      }

      ms->open_req_num=0;
      ms->disc_rsp_num=0;
      ms->req_dup_num=0;
      ms->rsp_dup_num=0;

      error_string=register_tap_listener("mgcp", ms, ms->filter, 0, NULL, mgcpstat_packet, mgcpstat_draw);
      if(error_string){
            /* error, we failed to attach to the tap. clean up */
            g_free(ms->filter);
            g_free(ms);

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


void
register_tap_listener_mgcpstat(void)
{
      /* We don't register this tap, if we don't have the mgcp plugin loaded.*/
      if (find_tap_id("mgcp")) {
            register_stat_cmd_arg("mgcp,rtd", mgcpstat_init, NULL);
      }
}


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