3 * Copyright 2006, Iskratel , Slovenia
4 * By Jakob Bratkovic <j.bratkovic@iskratel.si> and
5 * Miha Jemec <m.jemec@iskratel.si>
9 * based on rtp_stream.c
10 * Copyright 2003, Alcatel Business Systems
11 * By Lars Ruoff <lars.ruoff@gmx.net>
13 * Wireshark - Network traffic analyzer
14 * By Gerald Combs <gerald@wireshark.org>
15 * Copyright 1998 Gerald Combs
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
39 #ifdef HAVE_SYS_TYPES_H
40 # include <sys/types.h>
48 #include <epan/epan.h>
49 #include <epan/packet.h>
51 #include <epan/strutil.h>
53 #include "../globals.h"
54 #include "../register.h"
55 #include "../alert_box.h"
56 #include "../simple_dialog.h"
58 #include "gtk/mcast_stream.h"
59 #include "gtk/mcast_stream_dlg.h"
64 gint32 trigger=50; /* limit for triggering the burst alarm (in packets per second) */
65 gint32 bufferalarm = 10000; /* limit for triggernig the buffer alarm (in bytes) */
66 guint16 burstint = 100; /* burts interval in ms */
67 gint32 emptyspeed = 5000; /* outgoing speed for single stream (kbps)*/
68 gint32 cumulemptyspeed = 100000; /* outgoiong speed for all streams (kbps)*/
72 /* sliding window and buffer usage */
73 gint32 buffsize = (int)((double)MAX_SPEED * 100 / 1000) * 2;
74 guint16 comparetimes(struct timeval *t1, struct timeval *t2, guint16 burstint);
75 static void buffusagecalc(mcast_stream_info_t *strinfo, packet_info *pinfo, double emptyspeed);
76 static void slidingwindow(mcast_stream_info_t *strinfo, packet_info *pinfo);
79 /****************************************************************************/
80 /* the one and only global mcaststream_tapinfo_t structure */
81 static mcaststream_tapinfo_t the_tapinfo_struct =
82 {0, NULL, 0, NULL, 0, FALSE};
85 /****************************************************************************/
86 /* GCompareFunc style comparison function for _mcast_stream_info */
87 static gint mcast_stream_info_cmp(gconstpointer aa, gconstpointer bb)
89 const struct _mcast_stream_info* a = aa;
90 const struct _mcast_stream_info* b = bb;
94 if (a==NULL || b==NULL)
96 if (ADDRESSES_EQUAL(&(a->src_addr), &(b->src_addr))
97 && (a->src_port == b->src_port)
98 && ADDRESSES_EQUAL(&(a->dest_addr), &(b->dest_addr))
99 && (a->dest_port == b->dest_port))
107 /****************************************************************************/
108 /* when there is a [re]reading of packet's */
109 void mcaststream_reset(mcaststream_tapinfo_t *tapinfo)
113 /* free the data items first */
114 list = g_list_first(tapinfo->strinfo_list);
117 /* XYZ I don't know how to clean this */
118 /*g_free(list->element.buff); */
120 list = g_list_next(list);
122 g_list_free(tapinfo->strinfo_list);
123 tapinfo->strinfo_list = NULL;
125 /* XYZ and why does the line below causes a crach? */
126 /*g_free(tapinfo->allstreams->element.buff);*/
127 g_free(tapinfo->allstreams);
128 tapinfo->allstreams = NULL;
130 tapinfo->nstreams = 0;
131 tapinfo->npackets = 0;
133 ++(tapinfo->launch_count);
138 static void mcaststream_reset_cb(void *arg)
140 mcaststream_reset(arg);
143 /****************************************************************************/
144 /* redraw the output */
145 static void mcaststream_draw(void *arg _U_)
147 /* XXX: see mcaststream_on_update in mcast_streams_dlg.c for comments
148 g_signal_emit_by_name(top_level, "signal_mcaststream_update");
150 mcaststream_dlg_update(the_tapinfo_struct.strinfo_list);
156 /****************************************************************************/
157 /* whenever a udp packet is seen by the tap listener */
158 static int mcaststream_packet(void *arg, packet_info *pinfo, epan_dissect_t *edt _U_, const void *arg2 _U_)
160 mcaststream_tapinfo_t *tapinfo = arg;
161 mcast_stream_info_t tmp_strinfo;
162 mcast_stream_info_t *strinfo = NULL;
166 /* gather infos on the stream this packet is part of */
167 COPY_ADDRESS(&(tmp_strinfo.src_addr), &(pinfo->src));
168 tmp_strinfo.src_port = pinfo->srcport;
169 COPY_ADDRESS(&(tmp_strinfo.dest_addr), &(pinfo->dst));
170 tmp_strinfo.dest_port = pinfo->destport;
172 /* first we ignore non multicast packets; we filter out only those ethernet packets
173 * which start with the 01:00:5E multicast address (for IPv4) and 33:33 multicast
174 * address (for IPv6).
176 if ((pinfo->dl_dst.type != AT_ETHER) ||
177 ((strncmp("01005E", bytes_to_str(pinfo->dl_dst.data, pinfo->dl_dst.len), 6) != 0) &&
178 (strncmp("3333", bytes_to_str(pinfo->dl_dst.data, pinfo->dl_dst.len), 4) != 0)) )
181 /* check wether we already have a stream with these parameters in the list */
182 list = g_list_first(tapinfo->strinfo_list);
185 if (mcast_stream_info_cmp(&tmp_strinfo, (mcast_stream_info_t*)(list->data))==0)
187 strinfo = (mcast_stream_info_t*)(list->data); /*found!*/
190 list = g_list_next(list);
193 /* not in the list? then create a new entry */
195 /*printf("nov sip %s sp %d dip %s dp %d\n", g_strdup(get_addr_name(&(pinfo->src))),
196 pinfo->srcport, g_strdup(get_addr_name(&(pinfo->dst))), pinfo->destport);*/
197 tmp_strinfo.npackets = 0;
198 tmp_strinfo.apackets = 0;
199 tmp_strinfo.first_frame_num = pinfo->fd->num;
200 tmp_strinfo.start_sec = (guint32) pinfo->fd->abs_ts.secs;
201 tmp_strinfo.start_usec = pinfo->fd->abs_ts.nsecs/1000;
202 tmp_strinfo.start_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
203 tmp_strinfo.start_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
204 tmp_strinfo.vlan_id = 0;
206 /* reset Mcast stats */
207 tmp_strinfo.average_bw = 0;
208 tmp_strinfo.total_bytes = 0;
210 /* reset slidingwindow and buffer parameters */
211 tmp_strinfo.element.buff = (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
212 tmp_strinfo.element.first=0;
213 tmp_strinfo.element.last=0;
214 tmp_strinfo.element.burstsize=1;
215 tmp_strinfo.element.topburstsize=1;
216 tmp_strinfo.element.numbursts=0;
217 tmp_strinfo.element.burststatus=0;
218 tmp_strinfo.element.count=1;
219 tmp_strinfo.element.buffusage=pinfo->fd->pkt_len;
220 tmp_strinfo.element.topbuffusage=pinfo->fd->pkt_len;
221 tmp_strinfo.element.numbuffalarms=0;
222 tmp_strinfo.element.buffstatus=0;
223 tmp_strinfo.element.maxbw=0;
225 strinfo = g_malloc(sizeof(mcast_stream_info_t));
226 *strinfo = tmp_strinfo; /* memberwise copy of struct */
227 tapinfo->strinfo_list = g_list_append(tapinfo->strinfo_list, strinfo);
228 strinfo->element.buff = (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
230 /* set time with the first packet */
231 if (tapinfo->npackets == 0) {
232 tapinfo->allstreams = g_malloc(sizeof(mcast_stream_info_t));
233 tapinfo->allstreams->element.buff =
234 (struct timeval *)g_malloc(buffsize * sizeof(struct timeval));
235 tapinfo->allstreams->start_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
236 tapinfo->allstreams->start_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
237 tapinfo->allstreams->total_bytes = 0;
238 tapinfo->allstreams->element.first=0;
239 tapinfo->allstreams->element.last=0;
240 tapinfo->allstreams->element.burstsize=1;
241 tapinfo->allstreams->element.topburstsize=1;
242 tapinfo->allstreams->element.numbursts=0;
243 tapinfo->allstreams->element.burststatus=0;
244 tapinfo->allstreams->element.count=1;
245 tapinfo->allstreams->element.buffusage=pinfo->fd->pkt_len;
246 tapinfo->allstreams->element.topbuffusage=pinfo->fd->pkt_len;
247 tapinfo->allstreams->element.numbuffalarms=0;
248 tapinfo->allstreams->element.buffstatus=0;
249 tapinfo->allstreams->element.maxbw=0;
253 /* time between first and last packet in the group */
254 strinfo->stop_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
255 strinfo->stop_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
256 deltatime = ((float)((strinfo->stop_rel_sec * 1000000 + strinfo->stop_rel_usec)
257 - (strinfo->start_rel_sec*1000000 + strinfo->start_rel_usec)))/1000000;
259 /* calculate average bandwidth for this stream */
260 strinfo->total_bytes = strinfo->total_bytes + pinfo->fd->pkt_len;
262 strinfo->average_bw = (((float)(strinfo->total_bytes*8) / deltatime) / 1000000);
264 /* increment the packets counter for this stream and calculate average pps */
265 ++(strinfo->npackets);
266 strinfo->apackets = (guint32) (strinfo->npackets / deltatime);
268 /* time between first and last packet in any group */
269 tapinfo->allstreams->stop_rel_sec = (guint32) pinfo->fd->rel_ts.secs;
270 tapinfo->allstreams->stop_rel_usec = pinfo->fd->rel_ts.nsecs/1000;
271 deltatime = ((float)((tapinfo->allstreams->stop_rel_sec * 1000000 + tapinfo->allstreams->stop_rel_usec)
272 - (tapinfo->allstreams->start_rel_sec*1000000 + tapinfo->allstreams->start_rel_usec)))/1000000;
274 /* increment the packets counter of all streams */
275 ++(tapinfo->npackets);
277 /* calculate average bandwidth for all streams */
278 tapinfo->allstreams->total_bytes = tapinfo->allstreams->total_bytes + pinfo->fd->pkt_len;
280 tapinfo->allstreams->average_bw = (((float)(tapinfo->allstreams->total_bytes *8) / deltatime) / 1000000);
282 /* sliding window and buffercalc for this group*/
283 slidingwindow(strinfo, pinfo);
284 buffusagecalc(strinfo, pinfo, emptyspeed*1000);
285 /* sliding window and buffercalc for all groups */
286 slidingwindow(tapinfo->allstreams, pinfo);
287 buffusagecalc(tapinfo->allstreams, pinfo, cumulemptyspeed*1000);
288 /* end of sliding window */
290 return 1; /* refresh output */
294 /****************************************************************************/
295 /* scan for Mcast streams */
296 void mcaststream_scan(void)
298 gboolean was_registered = the_tapinfo_struct.is_registered;
299 if (!the_tapinfo_struct.is_registered)
300 register_tap_listener_mcast_stream();
302 cf_retap_packets(&cfile, FALSE);
305 remove_tap_listener_mcast_stream();
309 /****************************************************************************/
310 const mcaststream_tapinfo_t* mcaststream_get_info(void)
312 return &the_tapinfo_struct;
316 /****************************************************************************/
318 /****************************************************************************/
320 /****************************************************************************/
322 remove_tap_listener_mcast_stream(void)
324 if (the_tapinfo_struct.is_registered) {
325 protect_thread_critical_region();
326 remove_tap_listener(&the_tapinfo_struct);
327 unprotect_thread_critical_region();
329 the_tapinfo_struct.is_registered = FALSE;
334 /****************************************************************************/
336 register_tap_listener_mcast_stream(void)
338 GString *error_string;
339 if (!the_tapinfo_struct.is_registered) {
340 error_string = register_tap_listener("udp", &the_tapinfo_struct,
341 NULL, mcaststream_reset_cb, mcaststream_packet,
344 if (error_string != NULL) {
345 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
347 g_string_free(error_string, TRUE);
351 the_tapinfo_struct.is_registered = TRUE;
355 /*******************************************************************************/
356 /* sliding window and buffer calculations */
358 /* compare two times */
359 guint16 comparetimes(struct timeval *t1, struct timeval *t2, guint16 burstint){
360 if(((t2->tv_sec - t1->tv_sec)*1000 + (t2->tv_usec - t1->tv_usec)/1000) > burstint){
367 /* calculate buffer usage */
368 void buffusagecalc(mcast_stream_info_t *strinfo, packet_info *pinfo, double emptyspeed)
370 gint32 sec=0, usec=0, cur, prev;
371 struct timeval *buffer;
374 buffer = strinfo->element.buff;
375 cur = strinfo->element.last;
387 sec = buffer[cur].tv_sec - buffer[prev].tv_sec;
388 usec = buffer[cur].tv_usec - buffer[prev].tv_usec;
389 timeelapsed = (double)usec/1000000 + (double)sec;
391 /* bytes added to buffer */
392 strinfo->element.buffusage+=pinfo->fd->pkt_len;
394 /* bytes cleared from buffer */
395 strinfo->element.buffusage-= (guint32) (timeelapsed * emptyspeed / 8);
397 if(strinfo->element.buffusage < 0) strinfo->element.buffusage=0;
398 if(strinfo->element.buffusage > strinfo->element.topbuffusage)
399 strinfo->element.topbuffusage = strinfo->element.buffusage;
400 /* check for buffer losses */
401 if((strinfo->element.buffusage >= bufferalarm) && (strinfo->element.buffstatus == 0)){
402 strinfo->element.buffstatus = 1;
403 strinfo->element.numbuffalarms++;
404 } else if(strinfo->element.buffusage < bufferalarm){
405 strinfo->element.buffstatus = 0;
411 /* sliding window calculation */
412 void slidingwindow(mcast_stream_info_t *strinfo, packet_info *pinfo)
414 struct timeval *buffer;
417 buffer = strinfo->element.buff;
419 diff = strinfo->element.last - strinfo->element.first;
420 if(diff < 0) diff+=buffsize;
422 /* check if buffer is full */
423 if(diff >= (buffsize - 2)){
424 fprintf(stderr, "Warning: capture buffer full\n");
425 strinfo->element.first++;
426 if(strinfo->element.first >= buffsize) strinfo->element.first = strinfo->element.first % buffsize;
430 buffer[strinfo->element.last].tv_sec = (guint32) pinfo->fd->rel_ts.secs;
431 buffer[strinfo->element.last].tv_usec = pinfo->fd->rel_ts.nsecs/1000;
432 while(comparetimes((struct timeval *)&(buffer[strinfo->element.first]),
433 (struct timeval *)&(buffer[strinfo->element.last]), burstint)){
434 strinfo->element.first++;
435 if(strinfo->element.first >= buffsize) strinfo->element.first = strinfo->element.first % buffsize;
438 strinfo->element.burstsize = diff;
439 if(strinfo->element.burstsize > strinfo->element.topburstsize) {
440 strinfo->element.topburstsize = strinfo->element.burstsize;
441 strinfo->element.maxbw = (float)(strinfo->element.topburstsize) * 1000 / burstint * pinfo->fd->pkt_len * 8 / 1000000;
444 strinfo->element.last++;
445 if(strinfo->element.last >= buffsize) strinfo->element.last = strinfo->element.last % buffsize;
447 if((strinfo->element.burstsize >= trigger) && (strinfo->element.burststatus == 0)){
448 strinfo->element.burststatus = 1;
449 strinfo->element.numbursts++;
450 } else if(strinfo->element.burstsize < trigger){
451 strinfo->element.burststatus = 0;
454 strinfo->element.count++;