2016-07-12 18:25:35 +00:00
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/* packet-gsm_osmux.c
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* Routines for packet dissection of Osmux voice/signalling multiplex protocol
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* Copyright 2016 sysmocom s.f.m.c Daniel Willmann <dwillmann@sysmocom.de>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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2018-02-12 11:23:27 +00:00
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* SPDX-License-Identifier: GPL-2.0-or-later
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2016-07-12 18:25:35 +00:00
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*/
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2017-05-10 18:24:56 +00:00
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/* FIXME: I didn't find a way yet to reliably differentiate between streams
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* using same IPs+PORTs+CID over time. That means: if a recording session is
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* long enough, a call may have allocated a CID which was already used by
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* someone else in the past, and wireshark will handle those two calls as the
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* same stream. This is bad specially for statistics such as jitter.
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*/
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2016-07-12 18:25:35 +00:00
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#include "config.h"
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#include <string.h>
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#include <stdio.h>
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#include <epan/packet.h>
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#include <epan/stats_tree.h>
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#include <epan/tap.h>
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#include <epan/to_str.h>
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#include <epan/strutil.h>
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void proto_register_osmux(void);
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void proto_reg_handoff_osmux(void);
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2017-05-10 18:24:56 +00:00
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#define OSMUX_FT_SIGNAL 0x00
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#define OSMUX_FT_AMR 0x01
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#define OSMUX_FT_DUMMY 0x02
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2016-07-12 18:25:35 +00:00
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static const value_string osmux_ft_vals[] =
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{
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2017-05-10 18:24:56 +00:00
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{OSMUX_FT_SIGNAL, "Signalling"},
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{OSMUX_FT_AMR, "AMR"},
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{OSMUX_FT_DUMMY, "Dummy"},
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2016-07-12 18:25:35 +00:00
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{0, NULL}
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};
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2017-05-09 15:50:48 +00:00
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#define AMR_FT_0 0
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#define AMR_FT_1 1
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#define AMR_FT_2 2
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#define AMR_FT_3 3
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#define AMR_FT_4 4
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#define AMR_FT_5 5
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#define AMR_FT_6 6
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#define AMR_FT_7 7
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#define AMR_FT_SID 8
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#define AMR_FT_MAX 9
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static const value_string amr_ft_names[] =
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{
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{AMR_FT_0, "AMR 4.75"},
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{AMR_FT_1, "AMR 5.15"},
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{AMR_FT_2, "AMR 5.90"},
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{AMR_FT_3, "AMR 6.70"},
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{AMR_FT_4, "AMR 7.40"},
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{AMR_FT_5, "AMR 7.95"},
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{AMR_FT_6, "AMR 10.2"},
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{AMR_FT_7, "AMR 12.2"},
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{AMR_FT_SID, "AMR SID"},
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{0, NULL}
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};
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static guint8 amr_ft_bytes[AMR_FT_MAX] = {12, 13, 15, 17, 19, 20, 26, 31, 6};
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#define OSMUX_AMR_HEADER_LEN 4
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2016-07-12 18:25:35 +00:00
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/* Initialize the protocol and registered fields */
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static dissector_handle_t osmux_handle;
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static int proto_osmux = -1;
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static int osmux_tap = -1;
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2017-05-10 18:24:56 +00:00
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static int hf_osmux_stream_id = -1;
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2016-07-12 18:25:35 +00:00
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static int hf_osmux_ft_ctr = -1;
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2017-05-09 12:19:10 +00:00
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static int hf_osmux_rtp_m = -1;
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2016-07-12 18:25:35 +00:00
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static int hf_osmux_ft = -1;
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static int hf_osmux_ctr = -1;
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static int hf_osmux_amr_f = -1;
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static int hf_osmux_amr_q = -1;
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static int hf_osmux_seq = -1;
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static int hf_osmux_circuit_id = -1;
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static int hf_osmux_amr_ft_cmr = -1;
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static int hf_osmux_amr_ft = -1;
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static int hf_osmux_amr_cmr = -1;
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static int hf_osmux_amr_data = -1;
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/* Initialize the subtree pointers */
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static gint ett_osmux = -1;
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static gint ett_osmux_ft_ctr = -1;
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static gint ett_osmux_amr_ft_cmr = -1;
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2017-05-10 18:24:56 +00:00
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/* Stream handling */
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static wmem_map_t *osmux_stream_hash;
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static guint32 osmux_next_stream_id;
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struct osmux_stream_key {
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address src;
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address dst;
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port_type ptype;
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guint32 srcport;
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guint32 destport;
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guint32 cid;
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};
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struct osmux_stats_tree {
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gint node_id;
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gboolean amr_received;
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guint32 last_seq;
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guint32 prev_seq;
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nstime_t prev_ts;
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double jitter;
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};
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struct osmux_stream {
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struct osmux_stream_key *key;
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struct osmux_stats_tree stats;
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guint32 id;
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};
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/* Tap structure of Osmux header */
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struct osmux_hdr {
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2017-05-12 09:40:04 +00:00
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gboolean rtp_m;
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guint8 ft;
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guint8 ctr;
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gboolean amr_f;
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gboolean amr_q;
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guint8 seq;
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guint8 circuit_id;
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guint8 amr_cmr;
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guint8 amr_ft;
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2017-05-10 18:24:56 +00:00
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gboolean is_old_dummy;
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struct osmux_stream *stream;
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};
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2017-05-09 15:50:48 +00:00
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/* Code to calculate AMR payload size */
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static guint8
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2017-05-12 09:40:04 +00:00
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amr_ft_to_bytes(guint8 amr_ft)
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2017-05-09 15:50:48 +00:00
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{
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if (amr_ft >= AMR_FT_MAX) /* malformed packet ? */
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return 0;
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return amr_ft_bytes[amr_ft];
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}
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2016-07-12 18:25:35 +00:00
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2017-05-10 18:24:56 +00:00
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/*
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* Hash Functions
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*/
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static gint
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osmux_equal(gconstpointer v, gconstpointer w)
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{
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const struct osmux_stream_key *v1 = (const struct osmux_stream_key *)v;
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const struct osmux_stream_key *v2 = (const struct osmux_stream_key *)w;
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if (v1->ptype != v2->ptype)
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return 0; /* different types of port */
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if (v1->srcport == v2->srcport &&
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v1->destport == v2->destport &&
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addresses_equal(&v1->src, &v2->src) &&
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addresses_equal(&v1->dst, &v2->dst) &&
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v1->cid == v2->cid) {
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return 1;
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}
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return 0;
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}
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static guint
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osmux_hash (gconstpointer v)
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{
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const struct osmux_stream_key *key = (const struct osmux_stream_key *)v;
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guint hash_val;
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address tmp_addr;
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hash_val = 0;
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tmp_addr.len = 4;
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hash_val = add_address_to_hash(hash_val, &key->src);
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tmp_addr.data = &key->srcport;
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hash_val = add_address_to_hash(hash_val, &tmp_addr);
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hash_val = add_address_to_hash(hash_val, &key->dst);
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tmp_addr.data = &key->destport;
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hash_val = add_address_to_hash(hash_val, &tmp_addr);
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tmp_addr.data = &key->cid;
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hash_val = add_address_to_hash(hash_val, &tmp_addr);
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hash_val += ( hash_val << 3 );
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hash_val ^= ( hash_val >> 11 );
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hash_val += ( hash_val << 15 );
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return hash_val;
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}
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static gchar* stream_str(struct osmux_stream *stream, packet_info* pinfo)
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{
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gchar *ip_str, *ip2_str, *str;
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ip_str = address_to_str(NULL, &stream->key->src);
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ip2_str = address_to_str(NULL, &stream->key->dst);
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str = wmem_strdup_printf(pinfo->pool, "%u ([%s:%u->%s:%u]:%u)", stream->id,
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ip_str, stream->key->srcport, ip2_str, stream->key->destport,
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stream->key->cid);
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wmem_free(NULL, ip_str);
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wmem_free(NULL, ip2_str);
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return str;
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}
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static struct osmux_stream *
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get_stream(packet_info *pinfo, guint32 cid)
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{
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struct osmux_stream_key key, *new_key;
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struct osmux_stream *stream;
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copy_address_shallow(&key.src, &pinfo->src);
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copy_address_shallow(&key.dst, &pinfo->dst);
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key.ptype = pinfo->ptype;
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key.srcport = pinfo->srcport;
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key.destport = pinfo->destport;
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key.cid = cid;
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stream = (struct osmux_stream *) wmem_map_lookup(osmux_stream_hash, &key);
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if (!stream) {
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new_key = wmem_new(wmem_file_scope(), struct osmux_stream_key);
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*new_key = key;
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copy_address_wmem(wmem_file_scope(), &new_key->src, &key.src);
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copy_address_wmem(wmem_file_scope(), &new_key->dst, &key.dst);
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stream = wmem_new0(wmem_file_scope(), struct osmux_stream);
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stream->key = new_key;
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stream->id = osmux_next_stream_id;
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osmux_next_stream_id++;
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wmem_map_insert(osmux_stream_hash, new_key, stream);
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}
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return stream;
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}
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static void finish_process_pkt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, struct osmux_hdr *osmuxh)
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{
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proto_item* ti;
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osmuxh->stream = get_stream(pinfo, osmuxh->circuit_id);
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ti = proto_tree_add_uint(tree, hf_osmux_stream_id, tvb, 0, 0, osmuxh->stream->id);
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2019-04-03 21:32:30 +00:00
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proto_item_set_generated(ti);
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2017-05-10 18:24:56 +00:00
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tap_queue_packet(osmux_tap, pinfo, osmuxh);
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}
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2016-07-12 18:25:35 +00:00
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/* Code to actually dissect the packets */
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static gint
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dissect_osmux(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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2020-06-19 01:14:46 +00:00
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static int * const ft_ctr_fields[] = {
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2017-05-09 12:19:10 +00:00
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&hf_osmux_rtp_m,
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2016-07-12 18:25:35 +00:00
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&hf_osmux_ft,
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&hf_osmux_ctr,
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&hf_osmux_amr_f,
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&hf_osmux_amr_q,
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NULL
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};
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2020-06-19 01:14:46 +00:00
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static int * const amr_ft_cmr_fields[] = {
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2016-07-12 18:25:35 +00:00
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&hf_osmux_amr_ft,
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&hf_osmux_amr_cmr,
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NULL
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};
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int offset = 0;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Osmux");
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col_clear(pinfo->cinfo, COL_INFO);
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2017-05-09 15:50:48 +00:00
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while (tvb_reported_length_remaining(tvb, offset) >= 2) {
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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struct osmux_hdr *osmuxh;
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proto_item *ti;
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proto_tree *osmux_tree = NULL;
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guint8 ft_ctr;
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guint64 amr_ft_cmr;
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2017-05-12 09:40:04 +00:00
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guint8 i;
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guint32 size, temp;
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2016-07-12 18:25:35 +00:00
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2021-07-16 15:36:34 +00:00
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osmuxh = wmem_new0(pinfo->pool, struct osmux_hdr);
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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ft_ctr = tvb_get_guint8(tvb, offset);
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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osmuxh->rtp_m = ft_ctr >> 7;
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osmuxh->ft = (ft_ctr >> 5) & 0x3;
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osmuxh->ctr = (ft_ctr >> 2) & 0x7;
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osmuxh->amr_q = !!(ft_ctr & 0x02);
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osmuxh->amr_f = !!(ft_ctr & 0x01);
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", "Osmux ");
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
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val_to_str(osmuxh->ft, osmux_ft_vals,
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"unknown 0x%02x"));
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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if (osmuxh->rtp_m)
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col_append_fstr(pinfo->cinfo, COL_INFO, "(M) ");
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2017-05-09 12:19:10 +00:00
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2017-05-09 15:50:48 +00:00
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ti = proto_tree_add_protocol_format(tree, proto_osmux, tvb, offset, -1,
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"Osmux type %s frame",
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val_to_str(osmuxh->ft, osmux_ft_vals, "unknown 0x%02x"));
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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osmux_tree = proto_item_add_subtree(ti, ett_osmux);
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2016-07-12 18:25:35 +00:00
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2017-05-09 15:50:48 +00:00
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proto_tree_add_bitmask(osmux_tree, tvb, offset, hf_osmux_ft_ctr,
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ett_osmux_ft_ctr, ft_ctr_fields, ENC_BIG_ENDIAN);
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offset++;
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-09 15:50:48 +00:00
|
|
|
/* Old versions of the protocol used to send dummy packets of only 2 bytes (control + cid):_*/
|
|
|
|
if (ft_ctr == 0x23 && tvb_reported_length_remaining(tvb, offset - 1) == 2) {
|
2017-05-10 18:24:56 +00:00
|
|
|
osmuxh->is_old_dummy = TRUE;
|
2017-05-12 09:40:04 +00:00
|
|
|
proto_tree_add_item_ret_uint(osmux_tree, hf_osmux_circuit_id, tvb, offset, 1, ENC_BIG_ENDIAN, &temp);
|
|
|
|
osmuxh->circuit_id = (guint8)temp;
|
2017-05-10 18:24:56 +00:00
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "Old Dummy (CID %u)", osmuxh->circuit_id);
|
|
|
|
finish_process_pkt(tvb, pinfo, tree, osmuxh);
|
2017-05-09 15:50:48 +00:00
|
|
|
return tvb_reported_length(tvb);
|
|
|
|
}
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-12 09:40:04 +00:00
|
|
|
proto_tree_add_item_ret_uint(osmux_tree, hf_osmux_seq, tvb, offset, 1, ENC_BIG_ENDIAN, &temp);
|
|
|
|
osmuxh->seq = (guint8)temp;
|
2017-05-09 15:50:48 +00:00
|
|
|
offset++;
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-12 09:40:04 +00:00
|
|
|
proto_tree_add_item_ret_uint(osmux_tree, hf_osmux_circuit_id, tvb, offset, 1, ENC_BIG_ENDIAN, &temp);
|
|
|
|
osmuxh->circuit_id = (guint8)temp;
|
2017-05-09 15:50:48 +00:00
|
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(CID %u) ", osmuxh->circuit_id);
|
|
|
|
|
|
|
|
proto_tree_add_bitmask_ret_uint64(osmux_tree, tvb, offset, hf_osmux_amr_ft_cmr,
|
|
|
|
ett_osmux_amr_ft_cmr, amr_ft_cmr_fields, ENC_BIG_ENDIAN, &amr_ft_cmr);
|
|
|
|
offset++;
|
|
|
|
osmuxh->amr_ft = (guint32)(amr_ft_cmr & 0xf0) >> 4;
|
|
|
|
osmuxh->amr_cmr = (guint32)amr_ft_cmr & 0x0f;
|
|
|
|
size = amr_ft_to_bytes(osmuxh->amr_ft);
|
|
|
|
for (i = 0; i < osmuxh->ctr + 1; i++) {
|
|
|
|
proto_tree_add_item(osmux_tree, hf_osmux_amr_data, tvb, offset, size, ENC_NA);
|
|
|
|
offset += size;
|
|
|
|
}
|
2017-05-10 18:24:56 +00:00
|
|
|
finish_process_pkt(tvb, pinfo, tree, osmuxh);
|
2017-05-09 15:50:48 +00:00
|
|
|
}
|
2016-07-12 18:25:35 +00:00
|
|
|
|
|
|
|
return tvb_reported_length(tvb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Statistics */
|
2017-05-10 18:24:56 +00:00
|
|
|
static const gchar *st_str_total_pkts = "Osmux Total Packets";
|
|
|
|
static const gchar *st_str_conn = "Osmux Streams";
|
|
|
|
static const gchar *st_str_pkts = "Count: Osmux Packets";
|
|
|
|
static const gchar *st_str_amr = "Count: AMR frames";
|
|
|
|
static const gchar *st_str_rtp_m = "Field: RTP Marker (M)";
|
|
|
|
static const gchar *st_str_seq_rep = "SeqNum Analysis: Consecutive Repeated";
|
|
|
|
static const gchar *st_str_seq_lost = "SeqNum Analysis: Lost";
|
|
|
|
static const gchar *st_str_seq_ord = "SeqNum Analysis: In Order";
|
|
|
|
static const gchar *st_str_seq_ooo = "SeqNum Analysis: Out Of Order";
|
|
|
|
static const gchar *st_str_jit_rtt = "Jitter Analysis: Relative Transmit Time [ms]";
|
|
|
|
static const gchar *st_str_jit_rtt_abs = "Jitter Analysis: Relative Transmit Time (abs) [ms]";
|
|
|
|
static const gchar *st_str_jit_jit = "Jitter Analysis: Jitter [ms]";
|
2016-07-12 18:25:35 +00:00
|
|
|
|
|
|
|
static int st_osmux_stats = -1;
|
|
|
|
static int st_osmux_stats_conn = -1;
|
2017-05-10 18:24:56 +00:00
|
|
|
|
|
|
|
|
|
|
|
static void stream_hash_clean_stats(gpointer key _U_, gpointer value, gpointer user_data _U_) {
|
|
|
|
struct osmux_stream *stream = (struct osmux_stream *)value;
|
|
|
|
memset(&stream->stats, 0, sizeof(struct osmux_stats_tree));
|
|
|
|
}
|
2016-07-12 18:25:35 +00:00
|
|
|
|
|
|
|
static void osmux_stats_tree_init(stats_tree *st)
|
|
|
|
{
|
2017-05-10 18:24:56 +00:00
|
|
|
wmem_map_foreach(osmux_stream_hash, stream_hash_clean_stats, NULL);
|
2018-12-27 19:47:02 +00:00
|
|
|
st_osmux_stats = stats_tree_create_node(st, st_str_total_pkts, 0, STAT_DT_INT, TRUE);
|
|
|
|
st_osmux_stats_conn = stats_tree_create_node(st, st_str_conn, st_osmux_stats, STAT_DT_INT, TRUE);
|
2016-07-12 18:25:35 +00:00
|
|
|
}
|
|
|
|
|
2019-01-01 03:36:12 +00:00
|
|
|
static tap_packet_status osmux_stats_tree_packet(stats_tree *st,
|
|
|
|
packet_info *pinfo, epan_dissect_t *edt _U_, const void *p _U_)
|
2016-07-12 18:25:35 +00:00
|
|
|
{
|
2017-05-10 18:24:56 +00:00
|
|
|
gchar* stream_name;
|
|
|
|
gchar* ft_name;
|
2018-02-17 21:11:10 +00:00
|
|
|
const struct osmux_hdr *osmuxh = (const struct osmux_hdr*) p;
|
2017-05-10 18:24:56 +00:00
|
|
|
struct osmux_stream *stream = osmuxh->stream;
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-10 18:24:56 +00:00
|
|
|
stream_name = stream_str(stream, pinfo);
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-10 18:24:56 +00:00
|
|
|
tick_stat_node(st, st_str_total_pkts, 0, TRUE);
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-10 18:24:56 +00:00
|
|
|
if (!stream->stats.node_id) {
|
|
|
|
tick_stat_node(st, st_str_conn, st_osmux_stats, TRUE);
|
2018-12-27 19:47:02 +00:00
|
|
|
stream->stats.node_id = stats_tree_create_node(st, stream_name, st_osmux_stats_conn, STAT_DT_INT, TRUE);
|
2017-05-10 18:24:56 +00:00
|
|
|
}
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2017-05-10 18:24:56 +00:00
|
|
|
tick_stat_node(st, stream_name, st_osmux_stats_conn, TRUE);
|
|
|
|
tick_stat_node(st, st_str_pkts, stream->stats.node_id, TRUE);
|
|
|
|
|
|
|
|
ft_name = wmem_strdup_printf(pinfo->pool, "Field: FT: %s", osmuxh->is_old_dummy ? "Old Dummy" : osmux_ft_vals[osmuxh->ft].strptr);
|
|
|
|
tick_stat_node(st, ft_name, stream->stats.node_id, TRUE);
|
|
|
|
|
|
|
|
if (osmuxh->ft == OSMUX_FT_AMR && !osmuxh->is_old_dummy) {
|
|
|
|
|
|
|
|
increase_stat_node(st, st_str_amr, stream->stats.node_id, TRUE, osmuxh->ctr+1);
|
|
|
|
avg_stat_node_add_value_notick(st, st_str_amr, stream->stats.node_id, TRUE, osmuxh->ctr+1);
|
|
|
|
|
|
|
|
increase_stat_node(st, st_str_rtp_m, stream->stats.node_id, TRUE, osmuxh->rtp_m);
|
|
|
|
avg_stat_node_add_value_notick(st, st_str_rtp_m, stream->stats.node_id, TRUE, osmuxh->rtp_m);
|
|
|
|
|
|
|
|
|
|
|
|
/* Calculate relative transmit time */
|
|
|
|
if ((stream->stats.prev_ts.secs == 0 && stream->stats.prev_ts.nsecs == 0) || osmuxh->rtp_m) {
|
2018-12-27 19:47:02 +00:00
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_rtt, stream->stats.node_id, TRUE, 0);
|
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_rtt_abs, stream->stats.node_id, TRUE, 0);
|
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_jit, stream->stats.node_id, TRUE, 0);
|
2017-05-10 18:24:56 +00:00
|
|
|
stream->stats.jitter = 0;
|
|
|
|
} else {
|
|
|
|
nstime_t diff_rx;
|
|
|
|
gint32 diff_rx_ms, diff_tx_ms, Dij;
|
|
|
|
guint32 abs_Dij;
|
|
|
|
nstime_delta(&diff_rx, &pinfo->abs_ts, &stream->stats.prev_ts);
|
|
|
|
diff_rx_ms = (guint32) nstime_to_msec(&diff_rx);
|
|
|
|
diff_tx_ms = (osmuxh->seq - stream->stats.prev_seq)*(osmuxh->ctr+1)*20; /* SAMPLE RATE is 20msec/AMRframe */
|
|
|
|
Dij = diff_rx_ms - diff_tx_ms;
|
|
|
|
abs_Dij = Dij * ( Dij >= 0 ? 1 : -1 );
|
|
|
|
stream->stats.jitter = stream->stats.jitter + ((double) abs_Dij - stream->stats.jitter)/16.0;
|
2018-12-27 19:47:02 +00:00
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_rtt, stream->stats.node_id, TRUE, Dij);
|
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_rtt_abs, stream->stats.node_id, TRUE, abs_Dij);
|
|
|
|
avg_stat_node_add_value_int(st, st_str_jit_jit, stream->stats.node_id, TRUE, (gint) stream->stats.jitter);
|
2017-05-10 18:24:56 +00:00
|
|
|
}
|
|
|
|
stream->stats.prev_ts = pinfo->abs_ts;
|
|
|
|
stream->stats.prev_seq = osmuxh->seq;
|
|
|
|
|
|
|
|
/* Check sequence numbers */
|
|
|
|
if (!stream->stats.amr_received || (stream->stats.last_seq + 1) % 256 == osmuxh->seq ) {
|
|
|
|
/* normal case */
|
|
|
|
tick_stat_node(st, st_str_seq_ord, stream->stats.node_id, TRUE);
|
|
|
|
stream->stats.last_seq = osmuxh->seq;
|
|
|
|
stream->stats.amr_received = TRUE;
|
|
|
|
} else if (stream->stats.last_seq == osmuxh->seq) {
|
|
|
|
/* Last packet is repeated */
|
|
|
|
tick_stat_node(st, st_str_seq_rep, stream->stats.node_id, TRUE);
|
|
|
|
} else if ((stream->stats.last_seq + 1) % 256 < osmuxh->seq) {
|
|
|
|
/* Normal packet loss */
|
|
|
|
increase_stat_node(st, st_str_seq_lost, stream->stats.node_id, TRUE, osmuxh->seq - stream->stats.last_seq - 1);
|
|
|
|
stream->stats.last_seq = osmuxh->seq;
|
|
|
|
} else if (stream->stats.last_seq - osmuxh->seq > 0x008F) {
|
|
|
|
/* If last_Seq is a lot higher, a wraparound occurred with packet loss */
|
|
|
|
increase_stat_node(st, st_str_seq_lost, stream->stats.node_id, TRUE, 255 - stream->stats.last_seq + osmuxh->seq);
|
|
|
|
stream->stats.last_seq = osmuxh->seq;
|
|
|
|
} else if (stream->stats.last_seq > osmuxh->seq || osmuxh->seq - stream->stats.last_seq > 0x008F) {
|
|
|
|
/* Out of order packet */
|
|
|
|
tick_stat_node(st, st_str_seq_ooo, stream->stats.node_id, TRUE);
|
|
|
|
increase_stat_node(st, st_str_seq_lost, stream->stats.node_id, TRUE, -1);
|
|
|
|
}
|
2017-05-09 12:19:10 +00:00
|
|
|
|
2017-05-10 18:24:56 +00:00
|
|
|
}
|
2016-07-12 18:25:35 +00:00
|
|
|
|
2019-01-01 03:36:12 +00:00
|
|
|
return TAP_PACKET_REDRAW;
|
2016-07-12 18:25:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void proto_register_osmux(void)
|
|
|
|
{
|
|
|
|
static hf_register_info hf[] = {
|
2017-05-10 18:24:56 +00:00
|
|
|
{&hf_osmux_stream_id,
|
|
|
|
{"OSmux Stream ID", "osmux.stream_id",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x00,
|
|
|
|
"ID for a specific OSMUX flow", HFILL}
|
|
|
|
},
|
2016-07-12 18:25:35 +00:00
|
|
|
{&hf_osmux_ft_ctr,
|
|
|
|
{"FTCTRByte", "osmux.ft_ctr",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
|
|
"Byte with Fieldtype, Counter", HFILL}
|
|
|
|
},
|
2017-05-09 12:19:10 +00:00
|
|
|
{&hf_osmux_rtp_m,
|
|
|
|
{"RTP Marker", "osmux.rtp_m",
|
|
|
|
FT_BOOLEAN, 8, NULL, 0x80,
|
|
|
|
"Type of data in packet", HFILL}
|
|
|
|
},
|
2016-07-12 18:25:35 +00:00
|
|
|
{&hf_osmux_ft,
|
|
|
|
{"FieldType", "osmux.ft",
|
2017-05-09 12:19:10 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(osmux_ft_vals), 0x60,
|
2016-07-12 18:25:35 +00:00
|
|
|
"Type of data in packet", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_ctr,
|
|
|
|
{"CTR", "osmux.ctr",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0x1c,
|
|
|
|
"Number of AMR packets inside", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_q,
|
|
|
|
{"AMR f", "osmux.amr_f",
|
|
|
|
FT_BOOLEAN, 8, NULL, 0x02,
|
|
|
|
"AMR f parameter", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_f,
|
|
|
|
{"AMR q", "osmux.amr_q",
|
|
|
|
FT_BOOLEAN, 8, NULL, 0x01,
|
|
|
|
"AMR q parameter", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_seq,
|
|
|
|
{"Seq", "osmux.seq",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
|
|
"Sequence number", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_circuit_id,
|
|
|
|
{"Circuit ID", "osmux.circuit_id",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
|
|
NULL, HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_ft_cmr,
|
|
|
|
{"AMR info", "osmux.amr_ft_cmr",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
|
|
"Byte with AMR params ft and cmr", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_ft,
|
|
|
|
{"AMR ft", "osmux.amr_ft",
|
2017-05-09 15:50:48 +00:00
|
|
|
FT_UINT8, BASE_HEX,VALS(amr_ft_names), 0xf0,
|
2016-07-12 18:25:35 +00:00
|
|
|
"AMR parameter ft", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_cmr,
|
|
|
|
{"AMR cmr", "osmux.amr_cmr",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0x0f,
|
|
|
|
"AMR parameter cmr", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_osmux_amr_data,
|
|
|
|
{"AMR data", "osmux.amr_data",
|
|
|
|
FT_BYTES, BASE_NONE, NULL, 0x00,
|
|
|
|
"AMR voice data", HFILL}
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_osmux,
|
|
|
|
&ett_osmux_ft_ctr,
|
|
|
|
&ett_osmux_amr_ft_cmr,
|
|
|
|
};
|
|
|
|
|
|
|
|
proto_osmux = proto_register_protocol("GSM multiplexing for AMR", "GSM Osmux", "osmux");
|
|
|
|
|
|
|
|
proto_register_field_array(proto_osmux, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
2017-05-10 18:24:56 +00:00
|
|
|
|
|
|
|
osmux_stream_hash = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
|
|
|
|
osmux_hash, osmux_equal);
|
|
|
|
|
2016-07-12 18:25:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void proto_reg_handoff_osmux(void)
|
|
|
|
{
|
2016-10-05 20:33:54 +00:00
|
|
|
osmux_handle = create_dissector_handle(dissect_osmux, proto_osmux);
|
|
|
|
dissector_add_for_decode_as_with_preference("udp.port", osmux_handle);
|
|
|
|
|
|
|
|
osmux_tap = register_tap("osmux");
|
|
|
|
|
2017-05-09 12:04:18 +00:00
|
|
|
stats_tree_register("osmux", "osmux", "Osmux/osmux", 0,
|
2017-05-10 18:24:56 +00:00
|
|
|
osmux_stats_tree_packet, osmux_stats_tree_init, NULL);
|
2016-07-12 18:25:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2019-07-26 18:43:17 +00:00
|
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
2016-07-12 18:25:35 +00:00
|
|
|
*
|
|
|
|
* Local variables:
|
|
|
|
* c-basic-offset: 4
|
|
|
|
* tab-width: 8
|
|
|
|
* indent-tabs-mode: nil
|
|
|
|
* End:
|
|
|
|
*
|
|
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
|
|
* :indentSize=4:tabSize=8:noTabs=true:
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*/
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