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/** @file
*
* RTP analysis addition for Wireshark
*
* 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
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __TAP_RTP_ANALYSIS_H__
#define __TAP_RTP_ANALYSIS_H__
#include <epan/address.h>
#include <epan/packet_info.h>
/** @file
* ???
* @todo what's this?
*/
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/****************************************************************************/
/* 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 rtppacket_analyse */
/* use (flags & STAT_FLAG_FIRST) instead */
/* all of the following fields will be initialized after
* rtppacket_analyse has been called
*/
guint32 flags; /* see STAT_FLAG-defines below */
guint16 seq_num;
guint32 timestamp;
guint32 seq_timestamp;
guint32 first_timestamp;
double bandwidth;
bw_history_item bw_history[BUFF_BW];
guint16 bw_start_index;
guint16 bw_index;
guint32 total_bytes;
guint32 clock_rate;
double delta;
double jitter;
double diff;
double skew;
double sumt;
double sumTS;
double sumt2;
double sumtTS;
double time; /**< Unit is ms */
double start_time; /**< Unit is ms */
double lastnominaltime;
double lastarrivaltime;
double min_delta;
double max_delta;
double mean_delta;
double min_jitter;
double max_jitter;
double max_skew;
double mean_jitter;
guint32 max_nr;
guint16 start_seq_nr;
guint16 stop_seq_nr;
guint32 total_nr;
guint32 sequence;
gboolean under;
gint seq_cycles;
guint16 pt;
int reg_pt;
guint32 first_packet_num;
guint last_payload_len;
} tap_rtp_stat_t;
typedef struct _tap_rtp_save_data_t {
guint32 timestamp;
unsigned int payload_type;
size_t payload_len;
} tap_rtp_save_data_t;
#define PT_UNDEFINED -1
/* status flags for the flags parameter in tap_rtp_stat_t */
#define STAT_FLAG_FIRST 0x001
#define STAT_FLAG_MARKER 0x002
#define STAT_FLAG_WRONG_SEQ 0x004
#define STAT_FLAG_PT_CHANGE 0x008
#define STAT_FLAG_PT_CN 0x010
#define STAT_FLAG_FOLLOW_PT_CN 0x020
#define STAT_FLAG_REG_PT_CHANGE 0x040
#define STAT_FLAG_WRONG_TIMESTAMP 0x080
#define STAT_FLAG_PT_T_EVENT 0x100
#define STAT_FLAG_DUP_PKT 0x200
/* forward */
struct _rtp_info;
/* function for analysing an RTP packet. Called from rtp_analysis and rtp_streams */
extern void rtppacket_analyse(tap_rtp_stat_t *statinfo,
const packet_info *pinfo,
const struct _rtp_info *rtpinfo);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __TAP_RTP_ANALYSIS_H__ */
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