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/* rtp_analysis.h
* RTP analysis addition for ethereal
*
* $Id$
*
* Copyright 2003, Alcatel Business Systems
* By Lars Ruoff <lars.ruoff@gmx.net>
*
* based on tap_rtp.c
* Copyright 2003, Iskratel, Ltd, Kranj
* By Miha Jemec <m.jemec@iskratel.si>
*
* 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.
*/
#ifndef RTP_ANALYSIS_H_INCLUDED
#define RTP_ANALYSIS_H_INCLUDED
#include <glib.h>
#include <epan/address.h>
#include <epan/packet_info.h>
/** @file
* ???
* @todo what's this?
*/
void rtp_analysis(
address *ip_src_fwd,
guint16 port_src_fwd,
address *ip_dst_fwd,
guint16 port_dst_fwd,
guint32 ssrc_fwd,
address *ip_src_rev,
guint16 port_src_rev,
address *ip_dst_rev,
guint16 port_dst_rev,
guint32 ssrc_rev
);
/****************************************************************************/
/* structure that holds the information about the forward and reversed direction */
typedef struct _bw_history_item {
double time;
guint32 bytes;
} bw_history_item;
#define BUFF_BW 300
typedef struct _tap_rtp_stat_t {
gboolean first_packet; /* do not use in code that is called after rtp_packet_analyse */
/* use (flags & STAT_FLAG_FIRST) instead */
/* all of the following fields will be initialized after
rtp_packet_analyse has been called */
guint32 flags; /* see STAT_FLAG-defines below */
guint16 seq_num;
guint32 timestamp;
guint32 delta_timestamp;
double bandwidth;
bw_history_item bw_history[BUFF_BW];
guint16 bw_start_index;
guint16 bw_index;
guint32 total_bytes;
double delta;
double jitter;
double diff;
double time;
double start_time;
double max_delta;
double max_jitter;
double mean_jitter;
guint32 max_nr;
guint16 start_seq_nr;
guint16 stop_seq_nr;
guint32 total_nr;
guint32 sequence;
gboolean under;
gint cycles;
guint16 pt;
int reg_pt;
} tap_rtp_stat_t;
#define PT_UNDEFINED -1
/* status flags for the flags parameter in tap_rtp_stat_t */
#define STAT_FLAG_FIRST 0x01
#define STAT_FLAG_MARKER 0x02
#define STAT_FLAG_WRONG_SEQ 0x04
#define STAT_FLAG_PT_CHANGE 0x08
#define STAT_FLAG_PT_CN 0x10
#define STAT_FLAG_FOLLOW_PT_CN 0x20
#define STAT_FLAG_REG_PT_CHANGE 0x40
#define STAT_FLAG_WRONG_TIMESTAMP 0x80
/* forward */
struct _rtp_info;
/* function for analysing an RTP packet. Called from rtp_analysis and rtp_streams */
extern int rtp_packet_analyse(tap_rtp_stat_t *statinfo,
packet_info *pinfo,
const struct _rtp_info *rtpinfo);
#endif /*RTP_ANALYSIS_H_INCLUDED*/
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