tap-h225rassrt.c

   1 /* tap_h225rassrt.c
   2  * h225 RAS Service Response Time statistics for ethereal
   3  * Copyright 2003 Lars Roland
   4  *
   5  * $Id$
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@ethereal.com>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <stdio.h>
  31
  32 #ifdef HAVE_SYS_TYPES_H
  33 # include <sys/types.h>
  34 #endif
  35
  36 #include <string.h>
  37 #include "epan/packet_info.h"
  38 #include <epan/tap.h>
  39 #include "epan/value_string.h"
  40 #include "register.h"
  41 #include <epan/dissectors/packet-h225.h>
  42 #include "timestats.h"
  43
  44 /* following values represent the size of their valuestring arrays */
  45 #define NUM_RAS_STATS 7
  46
  47 static const value_string ras_message_category[] = {
  48   {  0, "Gatekeeper    "},
  49   {  1, "Registration  "},
  50   {  2, "UnRegistration"},
  51   {  3, "Admission     "},
  52   {  4, "Bandwidth     "},
  53   {  5, "Disengage     "},
  54   {  6, "Location      "},
  55   {  0, NULL }
  56 };
  57
  58 typedef enum _ras_type {
  59         RAS_REQUEST,
  60         RAS_CONFIRM,
  61         RAS_REJECT,
  62         RAS_OTHER
  63 }ras_type;
  64
  65 typedef enum _ras_category {
  66         RAS_GATEKEEPER,
  67         RAS_REGISTRATION,
  68         RAS_UNREGISTRATION,
  69         RAS_ADMISSION,
  70         RAS_BANDWIDTH,
  71         RAS_DISENGAGE,
  72         RAS_LOCATION,
  73         RAS_OTHERS
  74 }ras_category;
  75
  76 /* Summary of response-time calculations*/
  77 typedef struct _h225_rtd_t {
  78         guint32 open_req_num;
  79         guint32 disc_rsp_num;
  80         guint32 req_dup_num;
  81         guint32 rsp_dup_num;
  82         timestat_t stats;
  83 } h225_rtd_t;
  84
  85 /* used to keep track of the statistics for an entire program interface */
  86 typedef struct _h225rassrt_t {
  87         char *filter;
  88         h225_rtd_t ras_rtd[NUM_RAS_STATS];
  89 } h225rassrt_t;
  90
  91
  92 static void
  93 h225rassrt_reset(void *phs)
  94 {
  95         h225rassrt_t *hs=(h225rassrt_t *)phs;
  96         int i;
  97
  98         for(i=0;i<NUM_RAS_STATS;i++) {
  99                 hs->ras_rtd[i].stats.num = 0;
 100                 hs->ras_rtd[i].stats.min_num = 0;
 101                 hs->ras_rtd[i].stats.max_num = 0;
 102                 hs->ras_rtd[i].stats.min.secs = 0;
 103                 hs->ras_rtd[i].stats.min.nsecs = 0;
 104                 hs->ras_rtd[i].stats.max.secs = 0;
 105                 hs->ras_rtd[i].stats.max.nsecs = 0;
 106                 hs->ras_rtd[i].stats.tot.secs = 0;
 107                 hs->ras_rtd[i].stats.tot.nsecs = 0;
 108                 hs->ras_rtd[i].open_req_num = 0;
 109                 hs->ras_rtd[i].disc_rsp_num = 0;
 110                 hs->ras_rtd[i].req_dup_num = 0;
 111                 hs->ras_rtd[i].rsp_dup_num = 0;
 112         }
 113
 114 }
 115
 116 static int
 117 h225rassrt_packet(void *phs, packet_info *pinfo _U_, epan_dissect_t *edt _U_, const void *phi)
 118 {
 119         h225rassrt_t *hs=(h225rassrt_t *)phs;
 120         const h225_packet_info *pi=phi;
 121
 122         ras_type rasmsg_type = RAS_OTHER;
 123         ras_category rascategory = RAS_OTHERS;
 124
 125         if (pi->msg_type != H225_RAS || pi->msg_tag == -1) {
 126                 /* No RAS Message or uninitialized msg_tag -> return */
 127                 return 0;
 128         }
 129
 130         if (pi->msg_tag < 21) {
 131                 /* */
 132                 rascategory = pi->msg_tag / 3;
 133                 rasmsg_type = pi->msg_tag % 3;
 134         }
 135         else {
 136                 /* No SRT yet (ToDo) */
 137                 return 0;
 138         }
 139
 140         switch(rasmsg_type) {
 141
 142         case RAS_REQUEST:
 143                 if(pi->is_duplicate){
 144                         hs->ras_rtd[rascategory].req_dup_num++;
 145                 }
 146                 else {
 147                         hs->ras_rtd[rascategory].open_req_num++;
 148                 }
 149                 break;
 150
 151         case RAS_CONFIRM:
 152                 /* no break - delay calculation is identical for Confirm and Reject  */
 153         case RAS_REJECT:
 154                 if(pi->is_duplicate){
 155                         /* Duplicate is ignored */
 156                         hs->ras_rtd[rascategory].rsp_dup_num++;
 157                 }
 158                 else if (!pi->request_available) {
 159                         /* no request was seen, ignore response  */
 160                         hs->ras_rtd[rascategory].disc_rsp_num++;
 161                 }
 162                 else {
 163                         hs->ras_rtd[rascategory].open_req_num--;
 164                         time_stat_update(&(hs->ras_rtd[rascategory].stats),&(pi->delta_time), pinfo);
 165                 }
 166                 break;
 167
 168         default:
 169                 return 0;
 170                 break;
 171         }
 172         return 1;
 173 }
 174
 175 static void
 176 h225rassrt_draw(void *phs)
 177 {
 178         h225rassrt_t *hs=(h225rassrt_t *)phs;
 179         int i;
 180         timestat_t *rtd_temp;
 181
 182         printf("======================================== H225 RAS Service Response Time ========================================\n");
 183         printf("H225 RAS Service Response Time (SRT) Statistics:\n");
 184         printf("RAS-Messages   | Measurements |     Min SRT    |     Max SRT    |     Avg SRT    | Min in Frame | Max in Frame |\n");
 185         for(i=0;i<NUM_RAS_STATS;i++) {
 186                 rtd_temp = &(hs->ras_rtd[i].stats);
 187                 if(rtd_temp->num){
 188                         printf("%s | %10u   | %9.2f msec | %9.2f msec | %9.2f msec |  %10u  |  %10u  |\n",
 189                                 val_to_str(i,ras_message_category,"Unknown       "),rtd_temp->num,
 190                                 nstime_to_msec(&(rtd_temp->min)), nstime_to_msec(&(rtd_temp->max)),
 191                                 get_average(&(rtd_temp->tot), rtd_temp->num),
 192                                 rtd_temp->min_num, rtd_temp->max_num
 193                         );
 194                 }
 195         }
 196         printf("================================================================================================================\n");
 197         printf("RAS-Messages   |   Open REQ   |  Discarded RSP  |   Repeated REQ  |   Repeated RSP  |\n");
 198         for(i=0;i<NUM_RAS_STATS;i++) {
 199                 rtd_temp = &(hs->ras_rtd[i].stats);
 200                 if(rtd_temp->num){
 201                         printf("%s | %10u   |    %10u   |    %10u   |    %10u   |\n",
 202                                 val_to_str(i,ras_message_category,"Unknown       "),
 203                                 hs->ras_rtd[i].open_req_num, hs->ras_rtd[i].disc_rsp_num,
 204                                 hs->ras_rtd[i].req_dup_num, hs->ras_rtd[i].rsp_dup_num
 205                         );
 206                 }
 207         }
 208         printf("================================================================================================================\n");
 209
 210 }
 211
 212
 213 static void
 214 h225rassrt_init(char *optarg)
 215 {
 216         h225rassrt_t *hs;
 217         char *filter=NULL;
 218         GString *error_string;
 219
 220         if(!strncmp(optarg,"h225,srt,",9)){
 221                 filter=optarg+9;
 222         } else {
 223                 filter=g_malloc(1);
 224                 *filter='\0';
 225         }
 226
 227         hs = g_malloc(sizeof(h225rassrt_t));
 228         hs->filter=g_malloc(strlen(filter)+1);
 229         strcpy(hs->filter, filter);
 230
 231         h225rassrt_reset(hs);
 232
 233         error_string=register_tap_listener("h225", hs, filter, NULL, h225rassrt_packet, h225rassrt_draw);
 234         if(error_string){
 235                 /* error, we failed to attach to the tap. clean up */
 236                 g_free(hs->filter);
 237                 g_free(hs);
 238
 239                 fprintf(stderr, "tethereal: Couldn't register h225,srt tap: %s\n",
 240                     error_string->str);
 241                 g_string_free(error_string, TRUE);
 242                 exit(1);
 243         }
 244 }
 245
 246
 247 void
 248 register_tap_listener_h225rassrt(void)
 249 {
 250         register_ethereal_tap("h225,srt", h225rassrt_init);
 251 }