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wireshark/gtk/h323_conversations.c

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/* h323_conversations.c
* H323 conversations summary addition for ethereal
*
* $Id$
*
* Copyright 2004, Iskratel, Ltd, Kranj
* By Miha Jemec <m.jemec@iskratel.si>
*
* based on rtp_stream.c
* Copyright 2003, Alcatel Business Systems
* By Lars Ruoff <lars.ruoff@gmx.net>
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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 "h323_conversations.h"
#include "h323_conversations_dlg.h"
#include "globals.h"
#include <epan/tap.h>
#include <epan/dissectors/packet-h225.h>
#include <epan/dissectors/packet-h245.h>
#include "alert_box.h"
#include "simple_dialog.h"
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <string.h>
static void h245conversations_reset(void *arg);
char *transport_prot_name[256] ={
"","","","","","","tcp","","","", /* 0 to 10 */
"","","","","","","","udp","","", /* 10 to 20 */
"","","","","","","","","","", /* 20 to 30 */
"","","","","","","","","","", /* 30 to 40 */
"","","","","","","","","","", /* 40 to 50 */
"","","","","","","","","","", /* 50 to 60 */
"","","","","","","","","","", /* 60 to 70 */
"","","","","","","","","","", /* 70 to 80 */
"","","","","","","","","","", /* 80 to 90 */
"","","","","","","","","","", /* 90 to 100 */
"","","","","","","","","","", /* 100 to 110 */
"","","","","","","","","","", /* 110 to 120 */
"","","","","","","","","","", /* 120 to 130 */
"","","sctp","","","","","","","", /* 130 to 140 */
"","","","","","","","","","", /* 140 to 150 */
"","","","","","","","","","", /* 150 to 160 */
"","","","","","","","","","", /* 160 to 170 */
"","","","","","","","","","", /* 170 to 180 */
"","","","","","","","","","", /* 180 to 190 */
"","","","","","","","","","", /* 190 to 200 */
"","","","","","","","","","", /* 200 to 210 */
"","","","","","","","","","", /* 210 to 220 */
"","","","","","","","","","", /* 220 to 230 */
"","","","","","","","","","", /* 230 to 240 */
"","","","","","","","","","", /* 240 to 250 */
"","","","","","" /* 250 to 255 */
};
/****************************************************************************/
/* the one and only global h323conversations_tapinfo_t structure */
static h323conversations_tapinfo_t the_tapinfo_struct =
{0, NULL, 0, NULL, 0, 0, 0, 0};
/****************************************************************************/
/* GCompareFunc style comparison function for _h323_conversations_info */
gint h323_conversations_info_cmp(gconstpointer aa, gconstpointer bb)
{
const struct _h323_conversations_info* a = aa;
const struct _h323_conversations_info* b = bb;
if (a==b)
return 0;
if (a==NULL || b==NULL)
return 1;
if ((a->src_addr == b->src_addr)
&& (a->src_port == b->src_port)
&& (a->dest_addr == b->dest_addr)
&& (a->dest_port == b->dest_port)
&& (a->transport == b->transport)
)
return 0;
else if ((a->src_addr == b->dest_addr)
&& (a->src_port == b->dest_port)
&& (a->dest_addr == b->src_addr)
&& (a->dest_port == b->src_port)
&& (a->transport == b->transport)
)
return 0;
else
return 1;
}
/****************************************************************************/
/* when there is a [re]reading of packet's */
void h225conversations_reset(h323conversations_tapinfo_t *tapinfo)
{
GList* list;
/* free the data items first */
list = g_list_first(tapinfo->strinfo_list);
while (list)
{
g_free(list->data);
list = g_list_next(list);
}
g_list_free(tapinfo->strinfo_list);
tapinfo->strinfo_list = NULL;
tapinfo->nconversationss = 0;
tapinfo->npackets = 0;
tapinfo->setup_packets = 0;
tapinfo->completed_calls = 0;
tapinfo->rejected_calls = 0;
++(tapinfo->launch_count);
return;
}
static void h225conversations_reset_cb(void *arg)
{
h225conversations_reset(arg);
}
/****************************************************************************/
/* redraw the output */
static void h225conversations_draw(void *arg _U_)
{
/* XXX: see h323conversations_on_update in h323_conversations_dlg.c for comments
gtk_signal_emit_by_name(top_level, "signal_h225conversations_update");
*/
h323conversations_dlg_update(the_tapinfo_struct.strinfo_list);
return;
}
/****************************************************************************/
/* whenever a H225 packet is seen by the tap listener */
static int h225conversations_packet(void *arg, packet_info *pinfo, epan_dissect_t *edt _U_, const void *h225info)
{
h323conversations_tapinfo_t *tapinfo = arg;
h323_conversations_info_t tmp_strinfo;
h323_conversations_info_t *strinfo = NULL;
GList* list;
const h225_packet_info *pi = h225info;
/* TODO: evaluate RAS Messages. Just ignore them for now*/
if(pi->msg_type==H225_RAS)
return 0;
/* gather infos on the conversations this packet is part of */
g_memmove(&(tmp_strinfo.src_addr), pinfo->src.data, 4);
tmp_strinfo.src_port = pinfo->srcport;
g_memmove(&(tmp_strinfo.dest_addr), pinfo->dst.data, 4);
tmp_strinfo.dest_port = pinfo->destport;
tmp_strinfo.transport = pinfo->ipproto;
/* check wether we already have a conversations with these parameters in the list */
list = g_list_first(tapinfo->strinfo_list);
while (list)
{
if (h323_conversations_info_cmp(&tmp_strinfo, (h323_conversations_info_t*)(list->data))==0)
{
strinfo = (h323_conversations_info_t*)(list->data); /*found!*/
break;
}
list = g_list_next(list);
}
/* not in the list? then create a new entry */
if (!strinfo) {
tmp_strinfo.call_state = UNKNOWN;
tmp_strinfo.npackets = 0;
tmp_strinfo.h245packets = 0;
tmp_strinfo.first_frame_num = pinfo->fd->num;
tmp_strinfo.faststart = pi->is_faststart;
tmp_strinfo.is_h245 = pi->is_h245;
tmp_strinfo.h245address = pi->h245_address;
tmp_strinfo.h245port = pi->h245_port;
strinfo = g_malloc(sizeof(h323_conversations_info_t));
*strinfo = tmp_strinfo; /* memberwise copy of struct */
tapinfo->strinfo_list = g_list_append(tapinfo->strinfo_list, strinfo);
}
/* ok, there is an entry, but is it also an entry for h.245 address.
* h.245 address can be provided in connect message, but entry for this conversation
* already exists at this point */
else if (pi->is_h245) {
strinfo->is_h245 = pi->is_h245;
strinfo->h245address = pi->h245_address;
strinfo->h245port = pi->h245_port;
}
/* we check the faststart again in the connect message, if there is no
* faststart field in connect message, we asume, there is no faststart */
if ((pi->cs_type == H225_CONNECT) && (pi->is_faststart == 0))
strinfo->faststart = 0;
/* in the list or not in the list, we want the status */
/* we have four states: CALL SETUP, IN_CALL, COMPLETED, REJECTED
* CALL_SETUP: if the setup, call proceding, alerting,
* IN_CALL: connect
* COMPLETED: release complete after connect
* REJECTED: release complete without connect
*/
switch (pi->cs_type) {
case H225_SETUP:
strinfo->call_state = CALL_SETUP;
++(tapinfo->setup_packets);
break;
case H225_CALL_PROCEDING:
strinfo->call_state = CALL_SETUP;
break;
case H225_ALERTING:
strinfo->call_state = CALL_SETUP;
break;
case H225_CONNECT:
strinfo->call_state = IN_CALL;
break;
case H225_RELEASE_COMPLET:
if (strinfo->call_state == IN_CALL) {
strinfo->call_state = COMPLETED;
++(tapinfo->completed_calls);
}
else if (strinfo->call_state == CALL_SETUP) {
strinfo->call_state = REJECTED;
++(tapinfo->rejected_calls);
}
else if (strinfo->call_state == COMPLETED)
strinfo->call_state = COMPLETED;
else if (strinfo->call_state == REJECTED)
strinfo->call_state = REJECTED;
else
strinfo->call_state = UNKNOWN;
case H225_OTHER:
;
}
/* increment the packets counter for this conversations */
++(strinfo->npackets);
/* increment the packets counter of all conversationss */
++(tapinfo->npackets);
return 1; /* refresh output */
}
/****************************************************************************/
const h323conversations_tapinfo_t* h323conversations_get_info(void)
{
return &the_tapinfo_struct;
}
/****************************************************************************/
/* TAP INTERFACE */
/****************************************************************************/
static gboolean have_h225_tap_listener=FALSE;
/****************************************************************************/
void
h225conversations_init_tap(void)
{
GString *error_string;
h225conversations_reset(&the_tapinfo_struct);
if(have_h225_tap_listener==FALSE)
{
/* don't register tap listener, if we have it already */
error_string = register_tap_listener("h225", &the_tapinfo_struct, NULL,
h225conversations_reset_cb, h225conversations_packet,
h225conversations_draw);
if (error_string != NULL) {
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
error_string->str);
g_string_free(error_string, TRUE);
exit(1);
}
have_h225_tap_listener=TRUE;
}
}
/* XXX just copied from gtk/rpc_stat.c */
void protect_thread_critical_region(void);
void unprotect_thread_critical_region(void);
/****************************************************************************/
void
remove_tap_listener_h225_conversations(void)
{
protect_thread_critical_region();
remove_tap_listener(&the_tapinfo_struct);
unprotect_thread_critical_region();
have_h225_tap_listener=FALSE;
}
/****************************************************************************/
/* ***************************TAP for h245 **********************************/
/****************************************************************************/
/****************************************************************************/
static void h245conversations_reset(void *arg _U_)
{
return;
}
/****************************************************************************/
/* redraw the output */
static void h245conversations_draw(void *arg _U_)
{
h323conversations_dlg_update(the_tapinfo_struct.strinfo_list);
return;
}
/****************************************************************************/
/* whenever a H245 packet is seen by the tap listener */
static int h245conversations_packet(void *arg, packet_info *pinfo, epan_dissect_t *edt _U_, const void *h245info _U_)
{
h323conversations_tapinfo_t *tapinfo = arg;
GList* list;
struct _h323_conversations_info* a;
guint32 src, dst;
guint16 srcp, dstp;
guint16 p_transport;
/* check wether this packet is a part of any H323 conversation in the list*/
list = g_list_first(tapinfo->strinfo_list);
while (list)
{
a = (h323_conversations_info_t*)(list->data);
g_memmove(&src, pinfo->src.data, 4);
g_memmove(&dst, pinfo->dst.data, 4);
/* src = *(pinfo->src.data); */
/* dst = *(pinfo->dst.data); */
srcp = pinfo->srcport;
dstp = pinfo->destport;
p_transport = pinfo->ipproto;
if ( ((a->h245address == src) && (a->h245port == srcp) && (a->transport == p_transport)) ||
( (a->h245address == dst) && (a->h245port == dstp) && (a->transport == p_transport)) ) {
/* in the list? increment packet number */
++(a->h245packets);
break;
}
list = g_list_next(list);
}
return 1; /* refresh output */
}
/****************************************************************************/
static gboolean have_h245_tap_listener=FALSE;
void
h245conversations_init_tap(void)
{
GString *error_string;
if(have_h245_tap_listener==FALSE)
{
/* don't register tap listener, if we have it already */
error_string = register_tap_listener("h245", &the_tapinfo_struct,
NULL, h245conversations_reset, h245conversations_packet,
h245conversations_draw);
if (error_string != NULL) {
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
error_string->str);
g_string_free(error_string, TRUE);
exit(1);
}
have_h245_tap_listener=TRUE;
}
}
/****************************************************************************/
void
remove_tap_listener_h245_conversations(void)
{
protect_thread_critical_region();
remove_tap_listener(&the_tapinfo_struct);
unprotect_thread_critical_region();
have_h245_tap_listener=FALSE;
}
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