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tap-radiusstat.c

/* tap-radiusstat.c
 * Copyright 2006 Alejandro Vaquero <alejandrovaquero@yahoo.com>
 *
 * $Id: tap-radiusstat.c 24382 2008-02-18 22:39:03Z wmeier $
 *
 * 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-radius.h>
#include "timestats.h"

#define NUM_TIMESTATS 8

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

static const value_string radius_message_code[] = {
  {  0,     "Overall       "},
  {  1,     "Access        "},
  {  2,     "Accounting    "},
  {  3,     "Access Passw  "},
  {  4, "Ascend Acce Ev"},
  {  5, "Diconnect     "},
  {  6, "Change Filter "},
  {  7, "Other         "},
};

static int
radiusstat_packet(void *prs, packet_info *pinfo, epan_dissect_t *edt _U_, const void *pri)
{
      radiusstat_t *rs=(radiusstat_t *)prs;
      const radius_info_t *ri=pri;
      nstime_t delta;
      int ret = 0;

      switch (ri->code) {

      case RADIUS_ACCESS_REQUEST:
      case RADIUS_ACCOUNTING_REQUEST:
      case RADIUS_ACCESS_PASSWORD_REQUEST:
      case RADIUS_ASCEND_ACCESS_EVENT_REQUEST:
      case RADIUS_DISCONNECT_REQUEST:
      case RADIUS_CHANGE_FILTER_REQUEST:
            if(ri->is_duplicate){
                  /* Duplicate is ignored */
                  rs->req_dup_num++;
            }
            else {
                  rs->open_req_num++;
            }
            break;

      case RADIUS_ACCESS_ACCEPT:
      case RADIUS_ACCESS_REJECT:
      case RADIUS_ACCOUNTING_RESPONSE:
      case RADIUS_ACCESS_PASSWORD_ACK:
      case RADIUS_ACCESS_PASSWORD_REJECT:
      case RADIUS_ASCEND_ACCESS_EVENT_RESPONSE:
      case RADIUS_DISCONNECT_REQUEST_ACK:
      case RADIUS_DISCONNECT_REQUEST_NAK:
      case RADIUS_CHANGE_FILTER_REQUEST_ACK:
      case RADIUS_CHANGE_FILTER_REQUEST_NAK:
            if(ri->is_duplicate){
                  /* Duplicate is ignored */
                  rs->rsp_dup_num++;
            }
            else if (!ri->request_available) {
                  /* no request was seen */
                  rs->disc_rsp_num++;
            }
            else {
                  rs->open_req_num--;
                  /* calculate time delta between request and response */
                  nstime_delta(&delta, &pinfo->fd->abs_ts, &ri->req_time);

                  time_stat_update(&(rs->rtd[0]),&delta, pinfo);
                  if (ri->code == RADIUS_ACCESS_ACCEPT || ri->code == RADIUS_ACCESS_REJECT) {
                        time_stat_update(&(rs->rtd[1]),&delta, pinfo);
                  }
                  else if (ri->code == RADIUS_ACCOUNTING_RESPONSE) {
                        time_stat_update(&(rs->rtd[2]),&delta, pinfo);
                  }
                  else {
                        time_stat_update(&(rs->rtd[7]),&delta, pinfo);
                  }

                  ret = 1;
            }
            break;

      default:
            break;
      }

      return ret;
}

static void
radiusstat_draw(void *prs)
{
      radiusstat_t *rs=(radiusstat_t *)prs;
      int i;

      /* printing results */
      printf("\n");
      printf("===========================================================================================================\n");
      printf("RADIUS Response Time Delay (RTD) Statistics:\n");
      printf("Filter for statistics: %s\n",rs->filter?rs->filter:"");
        printf("Duplicate requests: %u\n",rs->req_dup_num);
        printf("Duplicate responses: %u\n",rs->rsp_dup_num);
        printf("Open requests: %u\n",rs->open_req_num);
        printf("Discarded responses: %u\n",rs->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(rs->rtd[i].num) {
                  printf("%s | %7u    | %8.2f msec | %8.2f msec | %8.2f msec |  %10u  |  %10u  |\n",
                        val_to_str(i,radius_message_code,"Other  "),rs->rtd[i].num,
                        nstime_to_msec(&(rs->rtd[i].min)), nstime_to_msec(&(rs->rtd[i].max)),
                        get_average(&(rs->rtd[i].tot), rs->rtd[i].num),
                        rs->rtd[i].min_num, rs->rtd[i].max_num
                  );
            }
      }
        printf("===========================================================================================================\n");
}


static void
radiusstat_init(const char *optarg, void* userdata _U_)
{
      radiusstat_t *rs;
      int i;
      const char *filter=NULL;
      GString *error_string;

      if(!strncmp(optarg,"radius,rtd,",11)){
            filter=optarg+11;
      } else {
            filter="";
      }

      rs=g_malloc(sizeof(radiusstat_t));
      rs->filter=g_strdup(filter);

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

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

      error_string=register_tap_listener("radius", rs, filter, NULL, radiusstat_packet, radiusstat_draw);
      if(error_string){
            /* error, we failed to attach to the tap. clean up */
            g_free(rs->filter);
            g_free(rs);

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


void
register_tap_listener_radiusstat(void)
{
      register_stat_cmd_arg("radius,rtd", radiusstat_init, NULL);
}


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