ui/gtk/mcast_stream.c

   1 /* mcast_stream.c
   2  *
   3  * Copyright 2006, Iskratel , Slovenia
   4  * By Jakob Bratkovic <j.bratkovic@iskratel.si> and
   5  * Miha Jemec <m.jemec@iskratel.si>
   6  *
   7  * $Id$
   8  *
   9  * based on rtp_stream.c
  10  * Copyright 2003, Alcatel Business Systems
  11  * By Lars Ruoff <lars.ruoff@gmx.net>
  12  *
  13  * Wireshark - Network traffic analyzer
  14  * By Gerald Combs <gerald@wireshark.org>
  15  * Copyright 1998 Gerald Combs
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License
  19  * as published by the Free Software Foundation; either version 2
  20  * of the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation,  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  30  */
  31
  32 #include "config.h"
  33 #ifdef HAVE_FCNTL_H
  34 #include <fcntl.h>
  35 #endif
  36
  37 #include <glib.h>
  38
  39 #include <stdio.h>
  40 #include <time.h>
  41 #include <string.h>
  42
  43 #include <gtk/gtk.h>
  44
  45 #include <epan/epan.h>
  46 #include <epan/address.h>
  47 #include <epan/packet.h>
  48 #include <epan/tap.h>
  49 #include <epan/strutil.h>
  50
  51 #include "ui/alert_box.h"
  52 #include "ui/simple_dialog.h"
  53
  54 #include "ui/gtk/mcast_stream.h"
  55 #include "ui/gtk/mcast_stream_dlg.h"
  56 #include "ui/gtk/main.h"
  57
  58 #ifdef HAVE_WINSOCK2_H
  59 #include <winsock2.h>
  60 #endif
  61
  62 gint32  mcast_stream_trigger         =     50; /* limit for triggering the burst alarm (in packets per second) */
  63 gint32  mcast_stream_bufferalarm     =  10000; /* limit for triggernig the buffer alarm (in bytes) */
  64 guint16 mcast_stream_burstint        =    100; /* burst interval in ms */
  65 gint32  mcast_stream_emptyspeed      =   5000; /* outgoing speed for single stream (kbps)*/
  66 gint32  mcast_stream_cumulemptyspeed = 100000; /* outgoiong speed for all streams (kbps)*/
  67
  68 /* sliding window and buffer usage */
  69 static gint32  buffsize = (int)((double)MAX_SPEED * 100 / 1000) * 2;
  70 static guint16 comparetimes(struct timeval *t1, struct timeval *t2, guint16 burstint_lcl);
  71 static void    buffusagecalc(mcast_stream_info_t *strinfo, packet_info *pinfo, double emptyspeed_lcl);
  72 static void    slidingwindow(mcast_stream_info_t *strinfo, packet_info *pinfo);
  73
  74
  75 /****************************************************************************/
  76 /* the one and only global mcaststream_tapinfo_t structure */
  77 static mcaststream_tapinfo_t the_tapinfo_struct =
  78         {0, NULL, 0, NULL, 0, FALSE};
  79
  80
  81 /****************************************************************************/
  82 /* GCompareFunc style comparison function for _mcast_stream_info */
  83 static gint
  84 mcast_stream_info_cmp(gconstpointer aa, gconstpointer bb)
  85 {
  86         const struct _mcast_stream_info* a = aa;
  87         const struct _mcast_stream_info* b = bb;
  88
  89         if (a==b)
  90                 return 0;
  91         if (a==NULL || b==NULL)
  92                 return 1;
  93         if (ADDRESSES_EQUAL(&(a->src_addr), &(b->src_addr))
  94                 && (a->src_port == b->src_port)
  95                 && ADDRESSES_EQUAL(&(a->dest_addr), &(b->dest_addr))
  96                 && (a->dest_port == b->dest_port))
  97                 return 0;
  98         else
  99                 return 1;
 100
 101 }
 102
 103
 104 /****************************************************************************/
 105 /* when there is a [re]reading of packet's */
 106 void
 107 mcaststream_reset(mcaststream_tapinfo_t *tapinfo)
 108 {
 109         GList* list;
 110
 111         /* free the data items first */
 112         list = g_list_first(tapinfo->strinfo_list);
 113         while (list)
 114         {
 115                 /* XYZ I don't know how to clean this */
 116                 /*g_free(list->element.buff); */
 117                 g_free(list->data);
 118                 list = g_list_next(list);
 119         }
 120         g_list_free(tapinfo->strinfo_list);
 121         tapinfo->strinfo_list = NULL;
 122
 123         /* XYZ and why does the line below causes a crach? */
 124         /*g_free(tapinfo->allstreams->element.buff);*/
 125         g_free(tapinfo->allstreams);
 126         tapinfo->allstreams = NULL;
 127
 128         tapinfo->nstreams = 0;
 129         tapinfo->npackets = 0;
 130
 131         ++(tapinfo->launch_count);
 132
 133         return;
 134 }
 135
 136 static void
 137 mcaststream_reset_cb(void *arg)
 138 {
 139         mcaststream_reset(arg);
 140 }
 141
 142 /****************************************************************************/
 143 /* redraw the output */
 144 static void
 145 mcaststream_draw(void *arg _U_)
 146 {
 147 /* XXX: see mcaststream_on_update in mcast_streams_dlg.c for comments
 148         g_signal_emit_by_name(top_level, "signal_mcaststream_update");
 149 */
 150         mcaststream_dlg_update(the_tapinfo_struct.strinfo_list);
 151         return;
 152 }
 153
 154
 155
 156 /****************************************************************************/
 157 /* whenever a udp packet is seen by the tap listener */
 158 static int
 159 mcaststream_packet(void *arg, packet_info *pinfo, epan_dissect_t *edt _U_, const void *arg2 _U_)
 160 {
 161         mcaststream_tapinfo_t *tapinfo = arg;
 162         mcast_stream_info_t tmp_strinfo;
 163         mcast_stream_info_t *strinfo = NULL;
 164         GList* list;
 165         float deltatime;
 166
 167         /* gather infos on the stream this packet is part of */
 168         COPY_ADDRESS(&(tmp_strinfo.src_addr), &(pinfo->src));
 169         tmp_strinfo.src_port = pinfo->srcport;
 170         COPY_ADDRESS(&(tmp_strinfo.dest_addr), &(pinfo->dst));
 171         tmp_strinfo.dest_port = pinfo->destport;
 172
 173         /* first we ignore non multicast packets; we filter out only those ethernet packets
 174          * which start with the 01:00:5E multicast address (for IPv4) and 33:33 multicast
 175          * address (for IPv6).
 176          */
 177         if ((pinfo->dl_dst.type != AT_ETHER) ||
 178             ((g_ascii_strncasecmp("01005E", bytes_to_str(pinfo->dl_dst.data, pinfo->dl_dst.len), 6) != 0) &&
 179              (g_ascii_strncasecmp("3333", bytes_to_str(pinfo->dl_dst.data, pinfo->dl_dst.len), 4) != 0)) )
 180                 return 0;
 181
 182         /* check whether we already have a stream with these parameters in the list */
 183         list = g_list_first(tapinfo->strinfo_list);
 184         while (list)
 185         {
 186                 if (mcast_stream_info_cmp(&tmp_strinfo, (mcast_stream_info_t*)(list->data))==0)
 187                 {
 188                         strinfo = (mcast_stream_info_t*)(list->data);  /*found!*/
 189                         break;
 190                 }
 191                 list = g_list_next(list);
 192         }
 193
 194         /* not in the list? then create a new entry */
 195         if (!strinfo) {
 196                 /*printf("nov sip %s sp %d dip %s dp %d\n", g_strdup(get_addr_name(&(pinfo->src))),
 197                         pinfo->srcport, g_strdup(get_addr_name(&(pinfo->dst))), pinfo->destport);*/
 198                 tmp_strinfo.npackets = 0;
 199                 tmp_strinfo.apackets = 0;
 200                 tmp_strinfo.first_frame_num = pinfo->fd->num;
 201                 tmp_strinfo.start_sec = (guint32) pinfo->fd->abs_ts.secs;
 202                 tmp_strinfo.start_usec = pinfo->fd->abs_ts.nsecs/1000;
 203                 tmp_strinfo.start_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
 204                 tmp_strinfo.start_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
 205                 tmp_strinfo.vlan_id = 0;
 206
 207                 /* reset Mcast stats */
 208                 tmp_strinfo.average_bw = 0;
 209                 tmp_strinfo.total_bytes = 0;
 210
 211                 /* reset slidingwindow and buffer parameters */
 212                 tmp_strinfo.element.buff = (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
 213                 tmp_strinfo.element.first=0;
 214                 tmp_strinfo.element.last=0;
 215                 tmp_strinfo.element.burstsize=1;
 216                 tmp_strinfo.element.topburstsize=1;
 217                 tmp_strinfo.element.numbursts=0;
 218                 tmp_strinfo.element.burststatus=0;
 219                 tmp_strinfo.element.count=1;
 220                 tmp_strinfo.element.buffusage=pinfo->fd->pkt_len;
 221                 tmp_strinfo.element.topbuffusage=pinfo->fd->pkt_len;
 222                 tmp_strinfo.element.numbuffalarms=0;
 223                 tmp_strinfo.element.buffstatus=0;
 224                 tmp_strinfo.element.maxbw=0;
 225
 226                 strinfo = g_malloc(sizeof(mcast_stream_info_t));
 227                 *strinfo = tmp_strinfo;  /* memberwise copy of struct */
 228                 tapinfo->strinfo_list = g_list_append(tapinfo->strinfo_list, strinfo);
 229                 strinfo->element.buff = (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
 230
 231                 /* set time with the first packet */
 232                 if (tapinfo->npackets == 0) {
 233                         tapinfo->allstreams = g_malloc(sizeof(mcast_stream_info_t));
 234                         tapinfo->allstreams->element.buff =
 235                                         (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
 236                         tapinfo->allstreams->start_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
 237                         tapinfo->allstreams->start_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
 238                         tapinfo->allstreams->total_bytes = 0;
 239                         tapinfo->allstreams->element.first=0;
 240                         tapinfo->allstreams->element.last=0;
 241                         tapinfo->allstreams->element.burstsize=1;
 242                         tapinfo->allstreams->element.topburstsize=1;
 243                         tapinfo->allstreams->element.numbursts=0;
 244                         tapinfo->allstreams->element.burststatus=0;
 245                         tapinfo->allstreams->element.count=1;
 246                         tapinfo->allstreams->element.buffusage=pinfo->fd->pkt_len;
 247                         tapinfo->allstreams->element.topbuffusage=pinfo->fd->pkt_len;
 248                         tapinfo->allstreams->element.numbuffalarms=0;
 249                         tapinfo->allstreams->element.buffstatus=0;
 250                         tapinfo->allstreams->element.maxbw=0;
 251                 }
 252         }
 253
 254         /* time between first and last packet in the group */
 255         strinfo->stop_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
 256         strinfo->stop_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
 257         deltatime = ((float)((strinfo->stop_rel_sec * 1000000 + strinfo->stop_rel_usec)
 258                                         - (strinfo->start_rel_sec*1000000 + strinfo->start_rel_usec)))/1000000;
 259
 260         /* calculate average bandwidth for this stream */
 261         strinfo->total_bytes = strinfo->total_bytes + pinfo->fd->pkt_len;
 262         if (deltatime > 0)
 263                 strinfo->average_bw = (((float)(strinfo->total_bytes*8) / deltatime) / 1000000);
 264
 265         /* increment the packets counter for this stream and calculate average pps */
 266         ++(strinfo->npackets);
 267         strinfo->apackets = (guint32) (strinfo->npackets / deltatime);
 268
 269         /* time between first and last packet in any group */
 270         tapinfo->allstreams->stop_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
 271         tapinfo->allstreams->stop_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
 272         deltatime = ((float)((tapinfo->allstreams->stop_rel_sec * 1000000 + tapinfo->allstreams->stop_rel_usec)
 273                 - (tapinfo->allstreams->start_rel_sec*1000000 + tapinfo->allstreams->start_rel_usec)))/1000000;
 274
 275         /* increment the packets counter of all streams */
 276         ++(tapinfo->npackets);
 277
 278         /* calculate average bandwidth for all streams */
 279         tapinfo->allstreams->total_bytes = tapinfo->allstreams->total_bytes + pinfo->fd->pkt_len;
 280         if (deltatime > 0)
 281                 tapinfo->allstreams->average_bw = (((float)(tapinfo->allstreams->total_bytes *8) / deltatime) / 1000000);
 282
 283         /* sliding window and buffercalc for this group*/
 284         slidingwindow(strinfo, pinfo);
 285         buffusagecalc(strinfo, pinfo, mcast_stream_emptyspeed*1000);
 286         /* sliding window and buffercalc for all groups */
 287         slidingwindow(tapinfo->allstreams, pinfo);
 288         buffusagecalc(tapinfo->allstreams, pinfo, mcast_stream_cumulemptyspeed*1000);
 289         /* end of sliding window */
 290
 291         return 1;  /* refresh output */
 292
 293 }
 294
 295 /****************************************************************************/
 296 /* scan for Mcast streams */
 297 void
 298 mcaststream_scan(void)
 299 {
 300         gboolean was_registered = the_tapinfo_struct.is_registered;
 301         if (!the_tapinfo_struct.is_registered)
 302                 register_tap_listener_mcast_stream();
 303
 304         cf_retap_packets(&cfile);
 305
 306         if (!was_registered)
 307                 remove_tap_listener_mcast_stream();
 308 }
 309
 310
 311 /****************************************************************************/
 312 const mcaststream_tapinfo_t *
 313 mcaststream_get_info(void)
 314 {
 315         return &the_tapinfo_struct;
 316 }
 317
 318
 319 /****************************************************************************/
 320 /* TAP INTERFACE */
 321 /****************************************************************************/
 322
 323 /****************************************************************************/
 324 void
 325 remove_tap_listener_mcast_stream(void)
 326 {
 327         if (the_tapinfo_struct.is_registered) {
 328                 remove_tap_listener(&the_tapinfo_struct);
 329
 330                 the_tapinfo_struct.is_registered = FALSE;
 331         }
 332 }
 333
 334
 335 /****************************************************************************/
 336 void
 337 register_tap_listener_mcast_stream(void)
 338 {
 339         GString *error_string;
 340         if (!the_tapinfo_struct.is_registered) {
 341                 error_string = register_tap_listener("udp", &the_tapinfo_struct,
 342                         NULL, 0, mcaststream_reset_cb, mcaststream_packet,
 343                         mcaststream_draw);
 344
 345                 if (error_string != NULL) {
 346                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 347                                       "%s", error_string->str);
 348                         g_string_free(error_string, TRUE);
 349                         exit(1);
 350                 }
 351
 352                 the_tapinfo_struct.is_registered = TRUE;
 353         }
 354 }
 355
 356 /*******************************************************************************/
 357 /* sliding window and buffer calculations */
 358
 359 /* compare two times */
 360 static guint16
 361 comparetimes(struct timeval *t1, struct timeval *t2, guint16 burstint_lcl)
 362 {
 363         if(((t2->tv_sec - t1->tv_sec)*1000 + (t2->tv_usec - t1->tv_usec)/1000) > burstint_lcl){
 364                 return 1;
 365         } else{
 366                 return 0;
 367         }
 368 }
 369
 370 /* calculate buffer usage */
 371 static void
 372 buffusagecalc(mcast_stream_info_t *strinfo, packet_info *pinfo, double emptyspeed_lcl)
 373 {
 374         time_t sec=0;
 375         gint32 usec=0, cur, prev;
 376         struct timeval *buffer;
 377         double timeelapsed;
 378
 379         buffer = strinfo->element.buff;
 380         cur = strinfo->element.last;
 381         if(cur == 0){
 382                 cur = buffsize - 1;
 383                 prev = cur - 1;
 384         } else if(cur == 1){
 385                 prev = buffsize - 1;
 386                 cur = 0;
 387         } else{
 388                 cur=cur-1;
 389                 prev=cur-1;
 390         }
 391
 392         sec = buffer[cur].tv_sec - buffer[prev].tv_sec;
 393         usec = buffer[cur].tv_usec - buffer[prev].tv_usec;
 394         timeelapsed = (double)usec/1000000 + (double)sec;
 395
 396         /* bytes added to buffer */
 397         strinfo->element.buffusage+=pinfo->fd->pkt_len;
 398
 399         /* bytes cleared from buffer */
 400         strinfo->element.buffusage-= (guint32) (timeelapsed * emptyspeed_lcl / 8);
 401
 402         if(strinfo->element.buffusage < 0) strinfo->element.buffusage=0;
 403         if(strinfo->element.buffusage > strinfo->element.topbuffusage)
 404                 strinfo->element.topbuffusage = strinfo->element.buffusage;
 405         /* check for buffer losses */
 406         if((strinfo->element.buffusage >= mcast_stream_bufferalarm) && (strinfo->element.buffstatus == 0)){
 407                 strinfo->element.buffstatus = 1;
 408                 strinfo->element.numbuffalarms++;
 409         } else if(strinfo->element.buffusage < mcast_stream_bufferalarm){
 410                 strinfo->element.buffstatus = 0;
 411         }
 412
 413         return;
 414 }
 415
 416 /* sliding window calculation */
 417 static void
 418 slidingwindow(mcast_stream_info_t *strinfo, packet_info *pinfo)
 419 {
 420         struct timeval *buffer;
 421         gint32 diff;
 422
 423         buffer = strinfo->element.buff;
 424
 425         diff = strinfo->element.last - strinfo->element.first;
 426         if(diff < 0) diff+=buffsize;
 427
 428         /* check if buffer is full */
 429         if(diff >= (buffsize - 2)){
 430                 fprintf(stderr, "Warning: capture buffer full\n");
 431                 strinfo->element.first++;
 432                 if(strinfo->element.first >= buffsize) strinfo->element.first = strinfo->element.first % buffsize;
 433         }
 434
 435         /* burst count */
 436         buffer[strinfo->element.last].tv_sec = (guint32) pinfo->fd->rel_ts.secs;
 437         buffer[strinfo->element.last].tv_usec = pinfo->fd->rel_ts.nsecs/1000;
 438         while(comparetimes((struct timeval *)&(buffer[strinfo->element.first]),
 439                            (struct timeval *)&(buffer[strinfo->element.last]), mcast_stream_burstint)){
 440                 strinfo->element.first++;
 441                 if(strinfo->element.first >= buffsize) strinfo->element.first = strinfo->element.first % buffsize;
 442                 diff--;
 443         }
 444         strinfo->element.burstsize = diff;
 445         if(strinfo->element.burstsize > strinfo->element.topburstsize) {
 446                 strinfo->element.topburstsize = strinfo->element.burstsize;
 447                 strinfo->element.maxbw = (float)(strinfo->element.topburstsize) * 1000 / mcast_stream_burstint * pinfo->fd->pkt_len * 8 / 1000000;
 448         }
 449
 450         strinfo->element.last++;
 451         if(strinfo->element.last >= buffsize) strinfo->element.last = strinfo->element.last % buffsize;
 452         /* trigger check */
 453         if((strinfo->element.burstsize >= mcast_stream_trigger) && (strinfo->element.burststatus == 0)){
 454                 strinfo->element.burststatus = 1;
 455                 strinfo->element.numbursts++;
 456         } else if(strinfo->element.burstsize < mcast_stream_trigger){
 457                 strinfo->element.burststatus = 0;
 458         }
 459
 460         strinfo->element.count++;
 461 }
 462