*
* Routines for RFC 2250 MPEG2 (ISO/IEC 13818-1) Transport Stream dissection
*
- * $Id:$
+ * $Id$
*
* Copyright 2006, Erwin Rol <erwin@erwinrol.com>
+ * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include "config.h"
#include <glib.h>
#include <epan/packet.h>
-#include <stdio.h>
-#include <string.h>
-
#include <epan/rtp_pt.h>
+#include <epan/wmem/wmem.h>
+#include <epan/conversation.h>
+#include <epan/expert.h>
+#include <epan/reassemble.h>
+
+#include <epan/tvbuff-int.h> /* XXX, for tvb_new_proxy() */
+
/* The MPEG2 TS packet size */
#define MP2T_PACKET_SIZE 188
+#define MP2T_SYNC_BYTE 0x47
+
+#define MP2T_PID_DOCSIS 0x1FFE
+#define MP2T_PID_NULL 0x1FFF
+
+static dissector_handle_t mp2t_handle;
+
+static dissector_handle_t docsis_handle;
+static dissector_handle_t mpeg_pes_handle;
+static dissector_handle_t mpeg_sect_handle;
+static dissector_handle_t data_handle;
+
+static heur_dissector_list_t heur_subdissector_list;
static int proto_mp2t = -1;
static gint ett_mp2t = -1;
+static gint ett_mp2t_header = -1;
+static gint ett_mp2t_af = -1;
+static gint ett_mp2t_analysis = -1;
+static gint ett_stuff = -1;
static int hf_mp2t_header = -1;
static int hf_mp2t_sync_byte = -1;
static int hf_mp2t_afc = -1;
static int hf_mp2t_cc = -1;
-#define MP2T_SYNC_BYTE_MASK 0xFF000000
-#define MP2T_TEI_MASK 0x00800000
-#define MP2T_PUSI_MASK 0x00400000
-#define MP2T_TP_MASK 0x00200000
-#define MP2T_PID_MASK 0x001FFF00
-#define MP2T_TSC_MASK 0x000000C0
-#define MP2T_AFC_MASK 0x00000030
-#define MP2T_CC_MASK 0x0000000F
-
-#define MP2T_SYNC_BYTE_SHIFT 24
-#define MP2T_TEI_SHIFT 23
-#define MP2T_PUSI_SHIFT 22
-#define MP2T_TP_SHIFT 21
-#define MP2T_PID_SHIFT 8
-#define MP2T_TSC_SHIFT 6
-#define MP2T_AFC_SHIFT 4
-#define MP2T_CC_SHIFT 0
+/* static int hf_mp2t_analysis_flags = -1; */
+static int hf_mp2t_analysis_skips = -1;
+static int hf_mp2t_analysis_drops = -1;
+
+#define MP2T_SYNC_BYTE_MASK 0xFF000000
+#define MP2T_TEI_MASK 0x00800000
+#define MP2T_PUSI_MASK 0x00400000
+#define MP2T_TP_MASK 0x00200000
+#define MP2T_PID_MASK 0x001FFF00
+#define MP2T_TSC_MASK 0x000000C0
+#define MP2T_AFC_MASK 0x00000030
+#define MP2T_CC_MASK 0x0000000F
+
+#define MP2T_SYNC_BYTE_SHIFT 24
+#define MP2T_TEI_SHIFT 23
+#define MP2T_PUSI_SHIFT 22
+#define MP2T_TP_SHIFT 21
+#define MP2T_PID_SHIFT 8
+#define MP2T_TSC_SHIFT 6
+#define MP2T_AFC_SHIFT 4
+#define MP2T_CC_SHIFT 0
static int hf_mp2t_af = -1;
static int hf_mp2t_af_length = -1;
static int hf_mp2t_af_tpd_flag = -1;
static int hf_mp2t_af_afe_flag = -1;
-#define MP2T_AF_DI_MASK 0x80
-#define MP2T_AF_RAI_MASK 0x40
-#define MP2T_AF_ESPI_MASK 0x20
-#define MP2T_AF_PCR_MASK 0x10
-#define MP2T_AF_OPCR_MASK 0x08
-#define MP2T_AF_SP_MASK 0x04
-#define MP2T_AF_TPD_MASK 0x02
-#define MP2T_AF_AFE_MASK 0x01
-
-#define MP2T_AF_DI_SHIFT 7
-#define MP2T_AF_RAI_SHIFT 6
-#define MP2T_AF_ESPI_SHIFT 5
-#define MP2T_AF_PCR_SHIFT 4
-#define MP2T_AF_OPCR_SHIFT 3
-#define MP2T_AF_SP_SHIFT 2
-#define MP2T_AF_TPD_SHIFT 1
-#define MP2T_AF_AFE_SHIFT 0
+#define MP2T_AF_DI_MASK 0x80
+#define MP2T_AF_RAI_MASK 0x40
+#define MP2T_AF_ESPI_MASK 0x20
+#define MP2T_AF_PCR_MASK 0x10
+#define MP2T_AF_OPCR_MASK 0x08
+#define MP2T_AF_SP_MASK 0x04
+#define MP2T_AF_TPD_MASK 0x02
+#define MP2T_AF_AFE_MASK 0x01
+
+#define MP2T_AF_DI_SHIFT 7
+#define MP2T_AF_RAI_SHIFT 6
+#define MP2T_AF_ESPI_SHIFT 5
+#define MP2T_AF_PCR_SHIFT 4
+#define MP2T_AF_OPCR_SHIFT 3
+#define MP2T_AF_SP_SHIFT 2
+#define MP2T_AF_TPD_SHIFT 1
+#define MP2T_AF_AFE_SHIFT 0
static int hf_mp2t_af_pcr = -1;
static int hf_mp2t_af_opcr = -1;
static int hf_mp2t_af_e_ss_flag = -1;
static int hf_mp2t_af_e_reserved = -1;
-#define MP2T_AF_E_LTW_FLAG_MASK 0x80
-#define MP2T_AF_E_PR_FLAG_MASK 0x40
-#define MP2T_AF_E_SS_FLAG_MASK 0x20
+#define MP2T_AF_E_LTW_FLAG_MASK 0x80
+#define MP2T_AF_E_PR_FLAG_MASK 0x40
+#define MP2T_AF_E_SS_FLAG_MASK 0x20
static int hf_mp2t_af_e_reserved_bytes = -1;
static int hf_mp2t_af_stuffing_bytes = -1;
static int hf_mp2t_af_e_dnau_14_0 = -1;
static int hf_mp2t_af_e_m_3 = -1;
-static int hf_mp2t_payload = -1;
+/* static int hf_mp2t_payload = -1; */
+static int hf_mp2t_stuff_bytes = -1;
+static int hf_mp2t_pointer = -1;
+
static const value_string mp2t_sync_byte_vals[] = {
- { 0x47, "Correct" },
- { 0, NULL},
+ { MP2T_SYNC_BYTE, "Correct" },
+ { 0, NULL }
};
-
static const value_string mp2t_pid_vals[] = {
- { 0x0000, "Program Association Table" },
- { 0x0001, "Conditional Access Table" },
- { 0x0002, "Transport Stream Description Table" },
- { 0x0003, "Reserved" },
- { 0x0004, "Reserved" },
- { 0x0005, "Reserved" },
- { 0x0006, "Reserved" },
- { 0x0007, "Reserved" },
- { 0x0008, "Reserved" },
- { 0x0009, "Reserved" },
- { 0x000A, "Reserved" },
- { 0x000B, "Reserved" },
- { 0x000C, "Reserved" },
- { 0x000D, "Reserved" },
- { 0x000E, "Reserved" },
- { 0x000F, "Reserved" },
- { 0x1FFF, "Null packet" },
- { 0, NULL },
+ { 0x0000, "Program Association Table" },
+ { 0x0001, "Conditional Access Table" },
+ { 0x0002, "Transport Stream Description Table" },
+ { 0x0003, "Reserved" },
+ { 0x0004, "Reserved" },
+ { 0x0005, "Reserved" },
+ { 0x0006, "Reserved" },
+ { 0x0007, "Reserved" },
+ { 0x0008, "Reserved" },
+ { 0x0009, "Reserved" },
+ { 0x000A, "Reserved" },
+ { 0x000B, "Reserved" },
+ { 0x000C, "Reserved" },
+ { 0x000D, "Reserved" },
+ { 0x000E, "Reserved" },
+ { 0x000F, "Reserved" },
+ { 0x1FFE, "DOCSIS Data-over-cable well-known PID" },
+ { 0x1FFF, "Null packet" },
+ { 0, NULL }
};
+
+/* Values below according ETSI ETR 289 */
static const value_string mp2t_tsc_vals[] = {
- { 0, "Not scrambled" },
- { 1, "User-defined" },
- { 2, "User-defined" },
- { 3, "User-defined" },
- { 0, NULL },
+ { 0, "Not scrambled" },
+ { 1, "Reserved" },
+ { 2, "Packet scrambled with Even Key" },
+ { 3, "Packet scrambled with Odd Key" },
+ { 0, NULL }
};
static const value_string mp2t_afc_vals[] = {
- { 0, "Reserved" },
- { 1, "Payload only" },
- { 2, "Adaptation Field only" },
- { 3, "Adaptation Field and Payload" },
- { 0, NULL },
+ { 0, "Reserved" },
+ { 1, "Payload only" },
+ { 2, "Adaptation Field only" },
+ { 3, "Adaptation Field and Payload" },
+ { 0, NULL }
+};
+
+static gint ett_msg_fragment = -1;
+static gint ett_msg_fragments = -1;
+static int hf_msg_fragments = -1;
+static int hf_msg_fragment = -1;
+static int hf_msg_fragment_overlap = -1;
+static int hf_msg_fragment_overlap_conflicts = -1;
+static int hf_msg_fragment_multiple_tails = -1;
+static int hf_msg_fragment_too_long_fragment = -1;
+static int hf_msg_fragment_error = -1;
+static int hf_msg_fragment_count = -1;
+static int hf_msg_reassembled_in = -1;
+static int hf_msg_reassembled_length = -1;
+
+static expert_field ei_mp2t_pointer = EI_INIT;
+static expert_field ei_mp2t_cc_drop = EI_INIT;
+
+static const fragment_items mp2t_msg_frag_items = {
+ /* Fragment subtrees */
+ &ett_msg_fragment,
+ &ett_msg_fragments,
+ /* Fragment fields */
+ &hf_msg_fragments,
+ &hf_msg_fragment,
+ &hf_msg_fragment_overlap,
+ &hf_msg_fragment_overlap_conflicts,
+ &hf_msg_fragment_multiple_tails,
+ &hf_msg_fragment_too_long_fragment,
+ &hf_msg_fragment_error,
+ &hf_msg_fragment_count,
+ /* Reassembled in field */
+ &hf_msg_reassembled_in,
+ /* Reassembled length field */
+ &hf_msg_reassembled_length,
+ /* Reassembled data field */
+ NULL,
+ /* Tag */
+ "Message fragments"
+};
+
+
+/* Data structure used for detecting CC drops
+ *
+ * conversation
+ * |
+ * +-> mp2t_analysis_data
+ * |
+ * +-> pid_table (RB tree) (key: pid)
+ * | |
+ * | +-> pid_analysis_data (per pid)
+ * | +-> pid_analysis_data
+ * | +-> pid_analysis_data
+ * |
+ * +-> frame_table (RB tree) (key: pinfo->fd->num)
+ * |
+ * +-> frame_analysis_data (only created if drop detected)
+ * |
+ * +-> ts_table (RB tree)
+ * |
+ * +-> ts_analysis_data (per TS subframe)
+ * +-> ts_analysis_data
+ * +-> ts_analysis_data
+ */
+
+typedef struct mp2t_analysis_data {
+
+ /* This structure contains a tree containing data for the
+ * individual pid's, this is only used when packets are
+ * processed sequencially.
+ */
+ wmem_tree_t *pid_table;
+
+ /* When detecting a CC drop, store that information for the
+ * given frame. This info is needed, when clicking around in
+ * wireshark, as the pid table data only makes sense during
+ * sequential processing. The flag pinfo->fd->flags.visited is
+ * used to tell the difference.
+ *
+ */
+ wmem_tree_t *frame_table;
+
+ /* Total counters per conversation / multicast stream */
+ guint32 total_skips;
+ guint32 total_discontinuity;
+
+} mp2t_analysis_data_t;
+
+enum pid_payload_type {
+ pid_pload_unknown,
+ pid_pload_docsis,
+ pid_pload_pes,
+ pid_pload_sect,
+ pid_pload_null
};
+typedef struct subpacket_analysis_data {
+ guint32 frag_cur_pos;
+ guint32 frag_tot_len;
+ gboolean fragmentation;
+ guint32 frag_id;
+} subpacket_analysis_data_t;
+
+typedef struct packet_analysis_data {
+
+ /* Contain information for each MPEG2-TS packet in the current big packet */
+ wmem_tree_t *subpacket_table;
+} packet_analysis_data_t;
+
+/* Analysis TS frame info needed during sequential processing */
+typedef struct pid_analysis_data {
+ guint16 pid;
+ gint8 cc_prev; /* Previous CC number */
+ enum pid_payload_type pload_type;
+
+ /* Fragments information used for first pass */
+ gboolean fragmentation;
+ guint32 frag_cur_pos;
+ guint32 frag_tot_len;
+ guint32 frag_id;
+} pid_analysis_data_t;
+
+/* Analysis info stored for a TS frame */
+typedef struct ts_analysis_data {
+ guint16 pid;
+ gint8 cc_prev; /* Previous CC number */
+ guint8 skips; /* Skips between CCs max 14 */
+} ts_analysis_data_t;
+
+
+typedef struct frame_analysis_data {
+
+ /* As each frame has several pid's, thus need a pid data
+ * structure per TS frame.
+ */
+ wmem_tree_t *ts_table;
+
+} frame_analysis_data_t;
+
+static mp2t_analysis_data_t *
+init_mp2t_conversation_data(void)
+{
+ mp2t_analysis_data_t *mp2t_data = NULL;
+
+ mp2t_data = wmem_new0(wmem_file_scope(), struct mp2t_analysis_data);
+
+ mp2t_data->pid_table = wmem_tree_new(wmem_file_scope());
+
+ mp2t_data->frame_table = wmem_tree_new(wmem_file_scope());
+
+ mp2t_data->total_skips = 0;
+ mp2t_data->total_discontinuity = 0;
+
+ return mp2t_data;
+}
+
+static mp2t_analysis_data_t *
+get_mp2t_conversation_data(conversation_t *conv)
+{
+ mp2t_analysis_data_t *mp2t_data = NULL;
+
+ mp2t_data = (mp2t_analysis_data_t *)conversation_get_proto_data(conv, proto_mp2t);
+ if (!mp2t_data) {
+ mp2t_data = init_mp2t_conversation_data();
+ conversation_add_proto_data(conv, proto_mp2t, mp2t_data);
+ }
+
+ return mp2t_data;
+}
+
+static frame_analysis_data_t *
+init_frame_analysis_data(mp2t_analysis_data_t *mp2t_data, packet_info *pinfo)
+{
+ frame_analysis_data_t *frame_analysis_data_p = NULL;
+
+ frame_analysis_data_p = wmem_new0(wmem_file_scope(), struct frame_analysis_data);
+ frame_analysis_data_p->ts_table = wmem_tree_new(wmem_file_scope());
+ /* Insert into mp2t tree */
+ wmem_tree_insert32(mp2t_data->frame_table, pinfo->fd->num,
+ (void *)frame_analysis_data_p);
+
+ return frame_analysis_data_p;
+}
+
+
+static frame_analysis_data_t *
+get_frame_analysis_data(mp2t_analysis_data_t *mp2t_data, packet_info *pinfo)
+{
+ frame_analysis_data_t *frame_analysis_data_p = NULL;
+ frame_analysis_data_p = (frame_analysis_data_t *)wmem_tree_lookup32(mp2t_data->frame_table, pinfo->fd->num);
+ return frame_analysis_data_p;
+}
+
+static pid_analysis_data_t *
+get_pid_analysis(guint32 pid, conversation_t *conv)
+{
+ pid_analysis_data_t *pid_data = NULL;
+ mp2t_analysis_data_t *mp2t_data = NULL;
+
+ mp2t_data = get_mp2t_conversation_data(conv);
+
+ pid_data = (pid_analysis_data_t *)wmem_tree_lookup32(mp2t_data->pid_table, pid);
+ if (!pid_data) {
+ pid_data = wmem_new0(wmem_file_scope(), struct pid_analysis_data);
+ pid_data->cc_prev = -1;
+ pid_data->pid = pid;
+ pid_data->frag_id = (pid << (32 - 13)) | 0x1;
+
+ wmem_tree_insert32(mp2t_data->pid_table, pid, (void *)pid_data);
+ }
+ return pid_data;
+}
+
+/* Structure to handle packets, spanned across
+ * multiple MPEG packets
+ */
+static reassembly_table mp2t_reassembly_table;
+
+static void
+mp2t_dissect_packet(tvbuff_t *tvb, enum pid_payload_type pload_type,
+ packet_info *pinfo, proto_tree *tree)
+{
+ dissector_handle_t handle = NULL;
+
+ switch (pload_type) {
+ case pid_pload_docsis:
+ handle = docsis_handle;
+ break;
+ case pid_pload_pes:
+ handle = mpeg_pes_handle;
+ break;
+ case pid_pload_sect:
+ handle = mpeg_sect_handle;
+ break;
+ default:
+ /* Should not happen */
+ break;
+ }
+
+ if (handle)
+ call_dissector(handle, tvb, pinfo, tree);
+ else
+ call_dissector(data_handle, tvb, pinfo, tree);
+}
+
+guint
+mp2t_get_packet_length(tvbuff_t *tvb, guint offset, packet_info *pinfo,
+ guint32 frag_id, enum pid_payload_type pload_type)
+{
+ fragment_head *frag = NULL;
+ tvbuff_t *len_tvb = NULL, *frag_tvb = NULL, *data_tvb = NULL;
+ gint pkt_len = 0;
+ guint remaining_len;
+
+ remaining_len = tvb_length_remaining(tvb, offset);
+ frag = fragment_get(&mp2t_reassembly_table, pinfo, frag_id, NULL);
+ if (frag)
+ frag = frag->next;
+
+ if (!frag) { /* First frame */
+ if ( (pload_type == pid_pload_docsis && remaining_len < 4) ||
+ (pload_type == pid_pload_sect && remaining_len < 3) ||
+ (pload_type == pid_pload_pes && remaining_len < 5) ) {
+ /* Not enough info to determine the size of the encapulated packet */
+ /* Just add the fragment and we'll check out the length later */
+ return -1;
+ }
+
+ len_tvb = tvb;
+ } else {
+ /* Create a composite tvb out of the two */
+ frag_tvb = tvb_new_proxy(frag->tvb_data);
+ len_tvb = tvb_new_composite();
+ tvb_composite_append(len_tvb, frag_tvb);
+
+ data_tvb = tvb_new_subset_remaining(tvb, offset);
+ tvb_composite_append(len_tvb, data_tvb);
+ tvb_composite_finalize(len_tvb);
+
+ offset = frag->offset;
+ }
+
+ /* Get the next packet's size if possible */
+ switch (pload_type) {
+ case pid_pload_docsis:
+ pkt_len = tvb_get_ntohs(len_tvb, offset + 2) + 6;
+ break;
+ case pid_pload_pes:
+ pkt_len = tvb_get_ntohs(len_tvb, offset + 4);
+ if (pkt_len) /* A size of 0 means size not bounded */
+ pkt_len += 6;
+ break;
+ case pid_pload_sect:
+ pkt_len = (tvb_get_ntohs(len_tvb, offset + 1) & 0xFFF) + 3;
+ break;
+ default:
+ /* Should not happen */
+ break;
+ }
+
+ if (frag_tvb)
+ tvb_free(frag_tvb);
+
+ return pkt_len;
+}
+
+static void
+mp2t_fragment_handle(tvbuff_t *tvb, guint offset, packet_info *pinfo,
+ proto_tree *tree, guint32 frag_id,
+ guint frag_offset, guint frag_len,
+ gboolean fragment_last, enum pid_payload_type pload_type)
+{
+ /* proto_item *ti; */
+ fragment_head *frag_msg = NULL;
+ tvbuff_t *new_tvb = NULL;
+ gboolean save_fragmented;
+
+ save_fragmented = pinfo->fragmented;
+ pinfo->fragmented = TRUE;
+
+ /* check length; send frame for reassembly */
+ frag_msg = fragment_add_check(&mp2t_reassembly_table,
+ tvb, offset, pinfo, frag_id, NULL,
+ frag_offset,
+ frag_len,
+ !fragment_last);
+
+ new_tvb = process_reassembled_data(tvb, offset, pinfo,
+ "Reassembled MP2T",
+ frag_msg, &mp2t_msg_frag_items,
+ NULL, tree);
+
+ if (new_tvb) {
+ /* ti = */ proto_tree_add_text(tree, tvb, 0, 0, "MPEG TS Packet (reassembled)");
+ mp2t_dissect_packet(new_tvb, pload_type, pinfo, tree);
+ }
+
+ pinfo->fragmented = save_fragmented;
+}
+
+
+/* Decoding of DOCSIS MAC frames within MPEG packets. MAC frames may begin anywhere
+ * within an MPEG packet or span multiple MPEG packets.
+ * payload_unit_start_indicator bit in MPEG header, and pointer field are used to
+ * decode fragmented DOCSIS frames within MPEG packet.
+ *-------------------------------------------------------------------------------
+ *MPEG Header | pointer_field | stuff_bytes | Start of MAC Frame #1 |
+ *(PUSI = 1) | (= 0) | (0 or more) |(up to 183 bytes) |
+ *-------------------------------------------------------------------------------
+ *-------------------------------------------------------------------------------
+ *MPEG Header | Continuation of MAC Frame #1 |
+ *(PUSI = 0) | (up to 183 bytes) |
+ *-------------------------------------------------------------------------------
+ *-------------------------------------------------------------------------------
+ *MPEG Header | pointer_field |Tail of MAC Frame| stuff_bytes |Start of MAC Frame|
+ *(PUSI = 1) | (= M) | #1 (M bytes) | (0 or more) |# 2 (N bytes) |
+ *-------------------------------------------------------------------------------
+ * Source - Data-Over-Cable Service Interface Specifications
+ * CM-SP-DRFI-I07-081209
+ */
+static void
+mp2t_process_fragmented_payload(tvbuff_t *tvb, gint offset, guint remaining_len, packet_info *pinfo,
+ proto_tree *tree, proto_tree *header_tree, guint32 pusi_flag,
+ pid_analysis_data_t *pid_analysis)
+{
+ tvbuff_t *next_tvb;
+ guint8 pointer = 0;
+ proto_item *pi;
+ guint stuff_len = 0;
+ proto_item *si;
+ proto_tree *stuff_tree;
+ packet_analysis_data_t *pdata = NULL;
+ subpacket_analysis_data_t *spdata = NULL;
+ guint32 frag_cur_pos = 0, frag_tot_len = 0;
+ gboolean fragmentation = FALSE;
+ guint32 frag_id = 0;
+
+ if (pusi_flag && pid_analysis->pload_type == pid_pload_unknown
+ && remaining_len > 3) {
+ /* We should already have identified if it was a DOCSIS packet
+ * Remaining possibility is PES or SECT */
+ if (tvb_get_ntoh24(tvb, offset) == 0x000001) {
+ /* Looks like a PES packet to me ... */
+ pid_analysis->pload_type = pid_pload_pes;
+ } else {
+ /* Most probably a SECT packet */
+ pid_analysis->pload_type = pid_pload_sect;
+ }
+ }
+
+ /* Unable to determine the payload type, do nothing */
+ if (pid_analysis->pload_type == pid_pload_unknown)
+ return;
+
+ /* PES packet don't have pointer fields, others do */
+ if (pusi_flag && pid_analysis->pload_type != pid_pload_pes) {
+ pointer = tvb_get_guint8(tvb, offset);
+ pi = proto_tree_add_item(header_tree, hf_mp2t_pointer, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset++;
+ remaining_len--;
+ if (pointer > remaining_len) {
+ /* Bogus pointer */
+ expert_add_info_format(pinfo, pi, &ei_mp2t_pointer,
+ "Pointer value is too large (> remaining data length %u)",
+ remaining_len);
+ }
+ }
+
+ if (!pinfo->fd->flags.visited) {
+ /* Get values from our current PID analysis */
+ frag_cur_pos = pid_analysis->frag_cur_pos;
+ frag_tot_len = pid_analysis->frag_tot_len;
+ fragmentation = pid_analysis->fragmentation;
+ frag_id = pid_analysis->frag_id;
+ pdata = (packet_analysis_data_t *)p_get_proto_data(pinfo->fd, proto_mp2t, 0);
+ if (!pdata) {
+ pdata = wmem_new0(wmem_file_scope(), packet_analysis_data_t);
+ pdata->subpacket_table = wmem_tree_new(wmem_file_scope());
+ p_add_proto_data(pinfo->fd, proto_mp2t, 0, pdata);
+
+ } else {
+ spdata = (subpacket_analysis_data_t *)wmem_tree_lookup32(pdata->subpacket_table, offset);
+ }
+
+ if (!spdata) {
+ spdata = wmem_new0(wmem_file_scope(), subpacket_analysis_data_t);
+ /* Save the info into pdata from pid_analysis */
+ spdata->frag_cur_pos = frag_cur_pos;
+ spdata->frag_tot_len = frag_tot_len;
+ spdata->fragmentation = fragmentation;
+ spdata->frag_id = frag_id;
+ wmem_tree_insert32(pdata->subpacket_table, offset, (void *)spdata);
+ }
+ } else {
+ /* Get saved values */
+ pdata = (packet_analysis_data_t *)p_get_proto_data(pinfo->fd, proto_mp2t, 0);
+ if (!pdata) {
+ /* Occurs for the first packets in the capture which cannot be reassembled */
+ return;
+ }
+
+ spdata = (subpacket_analysis_data_t *)wmem_tree_lookup32(pdata->subpacket_table, offset);
+ if (!spdata) {
+ /* Occurs for the first sub packets in the capture which cannot be reassembled */
+ return;
+ }
+
+ frag_cur_pos = spdata->frag_cur_pos;
+ frag_tot_len = spdata->frag_tot_len;
+ fragmentation = spdata->fragmentation;
+ frag_id = spdata->frag_id;
+ }
+
+ if (frag_tot_len == (guint)-1) {
+ frag_tot_len = mp2t_get_packet_length(tvb, offset, pinfo, frag_id, pid_analysis->pload_type);
+
+ if (frag_tot_len == (guint)-1) {
+ return;
+ }
+ }
+
+
+ /* The beginning of a new packet is present */
+ if (pusi_flag) {
+ if (pointer > remaining_len) {
+ /*
+ * Quit, so we don't use the bogus pointer value;
+ * that could cause remaining_len to become
+ * "negative", meaning it becomes a very large
+ * positive value.
+ */
+ return;
+ }
+
+ /* "pointer" contains the number of bytes until the
+ * start of the new section
+ * if the new section does not start immediately after the
+ * pointer field (i.e. pointer>0), the remaining bytes before the
+ * start of the section are another fragment of the
+ * current packet */
+ if (pointer>0 && fragmentation) {
+ mp2t_fragment_handle(tvb, offset, pinfo, tree, frag_id, frag_cur_pos,
+ pointer, TRUE, pid_analysis->pload_type);
+ frag_id++;
+ }
+
+ offset += pointer;
+ remaining_len -= pointer;
+ fragmentation = FALSE;
+ frag_cur_pos = 0;
+ frag_tot_len = 0;
+
+ if (!remaining_len) {
+ /* Shouldn't happen */
+ goto save_state;
+ }
+
+ while (remaining_len > 0) {
+ /* Skip stuff bytes */
+ stuff_len = 0;
+ while ((tvb_get_guint8(tvb, offset + stuff_len) == 0xFF)) {
+ stuff_len++;
+ if (stuff_len >= remaining_len) {
+ remaining_len = 0;
+ break;
+ }
+ }
+
+ if (stuff_len) {
+ si = proto_tree_add_text(tree, tvb, offset, stuff_len, "Stuffing");
+ stuff_tree = proto_item_add_subtree(si, ett_stuff);
+ proto_tree_add_item(stuff_tree, hf_mp2t_stuff_bytes, tvb, offset, stuff_len, ENC_NA);
+ offset += stuff_len;
+ if (stuff_len >= remaining_len) {
+ goto save_state;
+ }
+ remaining_len -= stuff_len;
+ }
+
+ /* Get the next packet's size if possible */
+ frag_tot_len = mp2t_get_packet_length(tvb, offset, pinfo, frag_id, pid_analysis->pload_type);
+ if (frag_tot_len == (guint)-1 || !frag_tot_len) {
+ mp2t_fragment_handle(tvb, offset, pinfo, tree, frag_id, 0, remaining_len, FALSE, pid_analysis->pload_type);
+ fragmentation = TRUE;
+ /*offset += remaining_len;*/
+ frag_cur_pos += remaining_len;
+ goto save_state;
+ }
+
+ /* Check for full packets within this TS frame */
+ if (frag_tot_len &&
+ frag_tot_len <= remaining_len) {
+ next_tvb = tvb_new_subset(tvb, offset, frag_tot_len, frag_tot_len);
+ mp2t_dissect_packet(next_tvb, pid_analysis->pload_type, pinfo, tree);
+ remaining_len -= frag_tot_len;
+ offset += frag_tot_len;
+ frag_tot_len = 0;
+ } else {
+ break;
+ }
+ }
+
+ if (remaining_len == 0) {
+ pid_analysis->frag_cur_pos = 0;
+ pid_analysis->frag_tot_len = 0;
+ goto save_state;
+
+ }
+
+ }
+
+ /* There are remaining bytes. Add them to the fragment list */
+
+ if ((frag_tot_len && frag_cur_pos + remaining_len >= frag_tot_len) || (!frag_tot_len && pusi_flag)) {
+ mp2t_fragment_handle(tvb, offset, pinfo, tree, frag_id, frag_cur_pos, remaining_len, TRUE, pid_analysis->pload_type);
+ frag_id++;
+ fragmentation = FALSE;
+ frag_cur_pos = 0;
+ frag_tot_len = 0;
+ } else {
+ mp2t_fragment_handle(tvb, offset, pinfo, tree, frag_id, frag_cur_pos, remaining_len, FALSE, pid_analysis->pload_type);
+ fragmentation = TRUE;
+ frag_cur_pos += remaining_len;
+ }
+
+save_state:
+ pid_analysis->fragmentation = fragmentation;
+ pid_analysis->frag_cur_pos = frag_cur_pos;
+ pid_analysis->frag_tot_len = frag_tot_len;
+ pid_analysis->frag_id = frag_id;
+}
+
+
+
+/* Calc the number of skipped CC numbers. Note that this can easy
+ * overflow, and a value above 7 indicate several network packets
+ * could be lost.
+ */
+static guint32
+calc_skips(gint32 curr, gint32 prev)
+{
+ int res = 0;
+
+ /* Only count the missing TS frames in between prev and curr.
+ * The "prev" frame CC number seen is confirmed received, it's
+ * the next frames CC counter which is the first known missing
+ * TS frame
+ */
+ prev += 1;
+
+ /* Calc missing TS frame 'skips' */
+ res = curr - prev;
+
+ /* Handle wrap around */
+ if (res < 0)
+ res += 16;
+
+ return res;
+}
+
+#define KEY(pid, cc) ((pid << 4)|cc)
+
+static guint32
+detect_cc_drops(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo,
+ guint32 pid, gint32 cc_curr, conversation_t *conv)
+{
+ gint32 cc_prev = -1;
+ pid_analysis_data_t *pid_data = NULL;
+ ts_analysis_data_t *ts_data = NULL;
+ mp2t_analysis_data_t *mp2t_data = NULL;
+ frame_analysis_data_t *frame_analysis_data_p = NULL;
+ proto_item *flags_item;
+
+ guint32 detected_drop = 0;
+ guint32 skips = 0;
+
+ mp2t_data = get_mp2t_conversation_data(conv);
+
+ /* The initial sequencial processing stage */
+ if (!pinfo->fd->flags.visited) {
+ /* This is the sequencial processing stage */
+ pid_data = get_pid_analysis(pid, conv);
+
+ cc_prev = pid_data->cc_prev;
+ pid_data->cc_prev = cc_curr;
+
+ /* Null packet always have a CC value equal 0 */
+ if (pid == 0x1fff)
+ return 0;
+
+ /* Its allowed that (cc_prev == cc_curr) if adaptation field */
+ if (cc_prev == cc_curr)
+ return 0;
+
+ /* Have not seen this pid before */
+ if (cc_prev == -1)
+ return 0;
+
+ /* Detect if CC is not increasing by one all the time */
+ if (cc_curr != ((cc_prev+1) & MP2T_CC_MASK)) {
+ detected_drop = 1;
+
+ skips = calc_skips(cc_curr, cc_prev);
+
+ mp2t_data->total_skips += skips;
+ mp2t_data->total_discontinuity++;
+ /* TODO: if (skips > 7) signal_loss++; ??? */
+ }
+ }
+
+ /* Save the info about the dropped packet */
+ if (detected_drop && !pinfo->fd->flags.visited) {
+ /* Lookup frame data, contains TS pid data objects */
+ frame_analysis_data_p = get_frame_analysis_data(mp2t_data, pinfo);
+ if (!frame_analysis_data_p)
+ frame_analysis_data_p = init_frame_analysis_data(mp2t_data, pinfo);
+
+ /* Create and store a new TS frame pid_data object.
+ This indicate that we have a drop
+ */
+ ts_data = wmem_new0(wmem_file_scope(), struct ts_analysis_data);
+ ts_data->cc_prev = cc_prev;
+ ts_data->pid = pid;
+ ts_data->skips = skips;
+ wmem_tree_insert32(frame_analysis_data_p->ts_table, KEY(pid, cc_curr),
+ (void *)ts_data);
+ }
+
+ /* See if we stored info about drops */
+ if (pinfo->fd->flags.visited) {
+
+ /* Lookup frame data, contains TS pid data objects */
+ frame_analysis_data_p = get_frame_analysis_data(mp2t_data, pinfo);
+ if (!frame_analysis_data_p)
+ return 0; /* No stored frame data -> no drops*/
+ else {
+ ts_data = (struct ts_analysis_data *)wmem_tree_lookup32(frame_analysis_data_p->ts_table,
+ KEY(pid, cc_curr));
+
+ if (ts_data) {
+ if (ts_data->skips > 0) {
+ detected_drop = 1;
+ cc_prev = ts_data->cc_prev;
+ skips = ts_data->skips;
+ }
+ }
+ }
+ }
+
+ /* Add info to the proto tree about drops */
+ if (detected_drop) {
+ expert_add_info_format(pinfo, tree, &ei_mp2t_cc_drop,
+ "Detected %d missing TS frames before this (last_cc:%d total skips:%d discontinuity:%d)",
+ skips, cc_prev,
+ mp2t_data->total_skips,
+ mp2t_data->total_discontinuity
+ );
+
+ flags_item = proto_tree_add_uint(tree, hf_mp2t_analysis_skips,
+ tvb, 0, 0, skips);
+ PROTO_ITEM_SET_GENERATED(flags_item);
+
+ flags_item = proto_tree_add_uint(tree, hf_mp2t_analysis_drops,
+ tvb, 0, 0, 1);
+ PROTO_ITEM_SET_GENERATED(flags_item);
+ }
+ return skips;
+}
+
static gint
-dissect_tsp( tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree )
+dissect_mp2t_adaptation_field(tvbuff_t *tvb, gint offset, guint8 af_length,
+ packet_info *pinfo _U_, proto_tree *tree)
{
- guint32 header;
- guint afc;
- gint start_offset = offset;
-
- proto_item *ti = NULL;
- proto_item *hi = NULL;
- proto_tree *mp2t_tree = NULL;
- proto_tree *mp2t_header_tree = NULL;
- proto_tree *mp2t_af_tree = NULL;
-
- ti = proto_tree_add_item( tree, proto_mp2t, tvb, offset, MP2T_PACKET_SIZE, FALSE );
- mp2t_tree = proto_item_add_subtree( ti, ett_mp2t );
-
- header = tvb_get_ntohl(tvb, offset);
-
- proto_item_append_text(ti, " PID=0x%x CC=%d", (header & MP2T_PID_MASK) >> MP2T_PID_SHIFT, (header & MP2T_CC_MASK) >> MP2T_CC_SHIFT );
-
-
- hi = proto_tree_add_item( mp2t_tree, hf_mp2t_header, tvb, offset, 4, FALSE);
- mp2t_header_tree = proto_item_add_subtree( hi, ett_mp2t );
-
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_sync_byte, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_tei, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_pusi, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_tp, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_pid, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_tsc, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_afc, tvb, offset, 4, FALSE);
- proto_tree_add_item( mp2t_header_tree, hf_mp2t_cc, tvb, offset, 4, FALSE);
- offset += 4;
-
- afc = (header & MP2T_AFC_MASK) >> MP2T_AFC_SHIFT;
-
- if (afc == 2 || afc == 3)
- {
- gint af_start_offset = offset;
-
- guint8 af_length;
- guint8 af_flags;
- gint stuffing_len;
-
-
- af_length = tvb_get_guint8(tvb, offset);
-
- proto_tree_add_item( mp2t_tree, hf_mp2t_af_length, tvb, offset, 1, FALSE);
- offset += 1;
-
- hi = proto_tree_add_item( mp2t_tree, hf_mp2t_af, tvb, offset, af_length, FALSE);
- mp2t_af_tree = proto_item_add_subtree( hi, ett_mp2t );
-
- af_flags = tvb_get_guint8(tvb, offset);
-
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_di, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_rai, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_espi, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_pcr_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_opcr_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_sp_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_afe_flag, tvb, offset, 1, FALSE);
-
- offset += 1;
-
- if (af_flags & MP2T_AF_PCR_MASK) {
- guint64 pcr_base = 0;
- guint32 pcr_ext = 0;
- guint8 tmp;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_base = (pcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_base = (pcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_base = (pcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_base = (pcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_base = (pcr_base << 1) | ((tmp >> 7) & 0x01);
- pcr_ext = (tmp & 0x01);
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- pcr_ext = (pcr_ext << 8) | tmp;
- offset += 1;
-
- proto_tree_add_none_format(mp2t_af_tree, hf_mp2t_af_pcr, tvb, offset - 6, 6,
- "Program Clock Reference: base(%ld) * 300 + ext(%d) = %ld",
- pcr_base, pcr_ext, pcr_base * 300 + pcr_ext);
- }
-
- if (af_flags & MP2T_AF_OPCR_MASK) {
- guint64 opcr_base = 0;
- guint32 opcr_ext = 0;
- guint8 tmp = 0;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_base = (opcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_base = (opcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_base = (opcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_base = (opcr_base << 8) | tmp;
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_base = (opcr_base << 1) | ((tmp >> 7) & 0x01);
- opcr_ext = (tmp & 0x01);
- offset += 1;
-
- tmp = tvb_get_guint8(tvb, offset);
- opcr_ext = (opcr_ext << 8) | tmp;
- offset += 1;
-
- proto_tree_add_none_format(mp2t_af_tree, hf_mp2t_af_opcr, tvb, offset - 6, 6,
- "Original Program Clock Reference: base(%ld) * 300 + ext(%d) = %ld",
- opcr_base, opcr_ext, opcr_base * 300 + opcr_ext);
-
- offset += 6;
- }
-
- if (af_flags & MP2T_AF_SP_MASK) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_sc, tvb, offset, 1, FALSE);
- offset += 1;
- }
-
- if (af_flags & MP2T_AF_TPD_MASK) {
- guint8 tpd_len;
-
- tpd_len = tvb_get_guint8(tvb, offset);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd_length, tvb, offset, 1, FALSE);
- offset += 1;
-
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd, tvb, offset, tpd_len, FALSE);
- offset += tpd_len;
- }
-
- if (af_flags & MP2T_AF_AFE_MASK) {
- guint8 e_len;
- guint8 e_flags;
- gint e_start_offset = offset;
- gint reserved_len = 0;
-
- e_len = tvb_get_guint8(tvb, offset);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_length, tvb, offset, 1, FALSE);
- offset += 1;
-
- e_flags = tvb_get_guint8(tvb, offset);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltw_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ss_flag, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_reserved, tvb, offset, 1, FALSE);
- offset += 1;
-
- if (e_flags & MP2T_AF_E_LTW_FLAG_MASK) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltwv_flag, tvb, offset, 2, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltwo, tvb, offset, 2, FALSE);
- offset += 2;
- }
-
- if (e_flags & MP2T_AF_E_PR_FLAG_MASK) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr_reserved, tvb, offset, 3, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr, tvb, offset, 3, FALSE);
- offset += 3;
- }
-
- if (e_flags & MP2T_AF_E_SS_FLAG_MASK) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_st, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_32_30, tvb, offset, 1, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_1, tvb, offset, 1, FALSE);
- offset += 1;
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_29_15, tvb, offset, 2, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_2, tvb, offset, 2, FALSE);
- offset += 2;
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_14_0, tvb, offset, 2, FALSE);
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_3, tvb, offset, 2, FALSE);
- offset += 2;
- }
-
- reserved_len = (e_len + 1) - (offset - e_start_offset);
- if (reserved_len > 0) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_reserved_bytes, tvb, offset, reserved_len, FALSE);
- offset += reserved_len;
- }
- }
-
- stuffing_len = (af_length + 1) - (offset - af_start_offset);
- if (stuffing_len > 0) {
- proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_stuffing_bytes, tvb, offset, stuffing_len, FALSE);
- offset += stuffing_len;
- }
- }
-
- if (afc == 0 || afc == 1) {
- gint payload_len;
-
- payload_len = MP2T_PACKET_SIZE - (offset - start_offset);
- if (payload_len > 0) {
- proto_tree_add_item( mp2t_tree, hf_mp2t_payload, tvb, offset, payload_len, FALSE);
- offset += payload_len;
- }
- }
-
- return offset;
+ gint af_start_offset;
+ proto_item *hi;
+ proto_tree *mp2t_af_tree;
+ guint8 af_flags;
+ gint stuffing_len;
+
+
+ af_start_offset = offset;
+
+ hi = proto_tree_add_item( tree, hf_mp2t_af, tvb, offset, af_length, ENC_NA);
+ mp2t_af_tree = proto_item_add_subtree( hi, ett_mp2t_af );
+
+ af_flags = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_di, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_rai, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_espi, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_pcr_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_opcr_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_sp_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_afe_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+
+ if (af_flags & MP2T_AF_PCR_MASK) {
+ guint64 pcr_base = 0;
+ guint32 pcr_ext = 0;
+ guint8 tmp;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_base = (pcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_base = (pcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_base = (pcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_base = (pcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_base = (pcr_base << 1) | ((tmp >> 7) & 0x01);
+ pcr_ext = (tmp & 0x01);
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ pcr_ext = (pcr_ext << 8) | tmp;
+ offset += 1;
+
+ proto_tree_add_none_format(mp2t_af_tree, hf_mp2t_af_pcr, tvb, offset - 6, 6,
+ "Program Clock Reference: base(%" G_GINT64_MODIFIER "u) * 300 + ext(%u) = %" G_GINT64_MODIFIER "u",
+ pcr_base, pcr_ext, pcr_base * 300 + pcr_ext);
+ }
+
+ if (af_flags & MP2T_AF_OPCR_MASK) {
+ guint64 opcr_base = 0;
+ guint32 opcr_ext = 0;
+ guint8 tmp = 0;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_base = (opcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_base = (opcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_base = (opcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_base = (opcr_base << 8) | tmp;
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_base = (opcr_base << 1) | ((tmp >> 7) & 0x01);
+ opcr_ext = (tmp & 0x01);
+ offset += 1;
+
+ tmp = tvb_get_guint8(tvb, offset);
+ opcr_ext = (opcr_ext << 8) | tmp;
+ offset += 1;
+
+ proto_tree_add_none_format(mp2t_af_tree, hf_mp2t_af_opcr, tvb, offset - 6, 6,
+ "Original Program Clock Reference: base(%" G_GINT64_MODIFIER "u) * 300 + ext(%u) = %" G_GINT64_MODIFIER "u",
+ opcr_base, opcr_ext, opcr_base * 300 + opcr_ext);
+
+ offset += 6;
+ }
+
+ if (af_flags & MP2T_AF_SP_MASK) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_sc, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ }
+
+ if (af_flags & MP2T_AF_TPD_MASK) {
+ guint8 tpd_len;
+
+ tpd_len = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd_length, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_tpd, tvb, offset, tpd_len, ENC_NA);
+ offset += tpd_len;
+ }
+
+ if (af_flags & MP2T_AF_AFE_MASK) {
+ guint8 e_len;
+ guint8 e_flags;
+ gint e_start_offset = offset;
+ gint reserved_len = 0;
+
+ e_len = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_length, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+
+ e_flags = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltw_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ss_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+
+ if (e_flags & MP2T_AF_E_LTW_FLAG_MASK) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltwv_flag, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_ltwo, tvb, offset, 2, ENC_BIG_ENDIAN);
+ offset += 2;
+ }
+
+ if (e_flags & MP2T_AF_E_PR_FLAG_MASK) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr_reserved, tvb, offset, 3, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_pr, tvb, offset, 3, ENC_BIG_ENDIAN);
+ offset += 3;
+ }
+
+ if (e_flags & MP2T_AF_E_SS_FLAG_MASK) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_st, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_32_30, tvb, offset, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_1, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_29_15, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_2, tvb, offset, 2, ENC_BIG_ENDIAN);
+ offset += 2;
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_dnau_14_0, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_m_3, tvb, offset, 2, ENC_BIG_ENDIAN);
+ offset += 2;
+ }
+
+ reserved_len = (e_len + 1) - (offset - e_start_offset);
+ if (reserved_len > 0) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_e_reserved_bytes, tvb, offset, reserved_len, ENC_NA);
+ offset += reserved_len;
+ }
+ }
+
+ stuffing_len = af_length - (offset - af_start_offset);
+ if (stuffing_len > 0) {
+ proto_tree_add_item( mp2t_af_tree, hf_mp2t_af_stuffing_bytes, tvb, offset, stuffing_len, ENC_NA);
+ offset += stuffing_len;
+ }
+
+ return offset-af_start_offset;
+}
+
+static void
+dissect_tsp(tvbuff_t *tvb, volatile gint offset, packet_info *pinfo,
+ proto_tree *tree, conversation_t *conv)
+{
+ guint32 header;
+ guint afc;
+ guint8 af_length;
+ gint start_offset = offset;
+ volatile gint payload_len;
+ pid_analysis_data_t *pid_analysis;
+
+ guint32 skips;
+ guint32 pid;
+ guint32 cc;
+ guint32 pusi_flag;
+
+ guint32 tsc;
+
+ proto_item *ti = NULL;
+ proto_item *hi = NULL;
+ proto_item *item = NULL;
+ proto_tree *mp2t_tree = NULL;
+ proto_tree *mp2t_header_tree = NULL;
+ proto_tree *mp2t_analysis_tree = NULL;
+ proto_item *afci = NULL;
+
+ ti = proto_tree_add_item( tree, proto_mp2t, tvb, offset, MP2T_PACKET_SIZE, ENC_NA );
+ mp2t_tree = proto_item_add_subtree( ti, ett_mp2t );
+
+ header = tvb_get_ntohl(tvb, offset);
+
+ pid = (header & MP2T_PID_MASK) >> MP2T_PID_SHIFT;
+ cc = (header & MP2T_CC_MASK) >> MP2T_CC_SHIFT;
+ tsc = (header & MP2T_TSC_MASK);
+ pusi_flag = (header & 0x00400000);
+ proto_item_append_text(ti, " PID=0x%x CC=%d", pid, cc);
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPEG TS");
+
+ hi = proto_tree_add_item( mp2t_tree, hf_mp2t_header, tvb, offset, 4, ENC_BIG_ENDIAN);
+ mp2t_header_tree = proto_item_add_subtree( hi, ett_mp2t_header );
+
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_sync_byte, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_tei, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_pusi, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_tp, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_tsc, tvb, offset, 4, ENC_BIG_ENDIAN);
+ afci = proto_tree_add_item( mp2t_header_tree, hf_mp2t_afc, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item( mp2t_header_tree, hf_mp2t_cc, tvb, offset, 4, ENC_BIG_ENDIAN);
+
+ afc = (header & MP2T_AFC_MASK) >> MP2T_AFC_SHIFT;
+
+ pid_analysis = get_pid_analysis(pid, conv);
+
+ /* Find out the payload type based on the payload */
+ if (pid_analysis->pload_type == pid_pload_unknown) {
+ if (pid == MP2T_PID_NULL) {
+ pid_analysis->pload_type = pid_pload_null;
+ } else if (pid == MP2T_PID_DOCSIS) {
+ pid_analysis->pload_type = pid_pload_docsis;
+ }
+ }
+
+ if (pid_analysis->pload_type == pid_pload_docsis && afc) {
+ /* DOCSIS packets should not have an adaptation field */
+ proto_item_append_text(afci, " (Invalid for DOCSIS packets, should be 0)");
+ }
+
+ if (pid_analysis->pload_type == pid_pload_null) {
+ /* Nothing more to do */
+ col_set_str(pinfo->cinfo, COL_INFO, "NULL packet");
+ proto_item_append_text(afci, " (Should be 0 for NULL packets)");
+ return;
+ }
+
+ offset += 4;
+
+ /* Create a subtree for analysis stuff */
+ item = proto_tree_add_text(mp2t_tree, tvb, offset, 0, "MPEG2 PCR Analysis");
+ PROTO_ITEM_SET_GENERATED(item);
+ mp2t_analysis_tree = proto_item_add_subtree(item, ett_mp2t_analysis);
+
+ skips = detect_cc_drops(tvb, mp2t_analysis_tree, pinfo, pid, cc, conv);
+ if (skips > 0)
+ proto_item_append_text(ti, " skips=%d", skips);
+
+ if (afc == 2 || afc == 3) {
+ af_length = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item( mp2t_tree, hf_mp2t_af_length, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ /* fix issues where afc==3 but af_length==0
+ * Adaptaion field...spec section 2.4.3.5: The value 0 is for inserting a single
+ * stuffing byte in a Transport Stream packet. When the adaptation_field_control
+ * value is '11', the value of the adaptation_field_length shall be in the range 0 to 182.
+ */
+ if (af_length>0)
+ offset += dissect_mp2t_adaptation_field(tvb, offset, af_length, pinfo, mp2t_tree);
+ }
+
+ if ((offset - start_offset) < MP2T_PACKET_SIZE)
+ payload_len = MP2T_PACKET_SIZE - (offset - start_offset);
+ else
+ payload_len = 0;
+
+ if (!payload_len)
+ return;
+
+ if (afc == 2) {
+ col_set_str(pinfo->cinfo, COL_INFO, "Adaptation field only");
+ /* The rest of the packet is stuffing bytes */
+ proto_tree_add_item( mp2t_tree, hf_mp2t_stuff_bytes, tvb, offset, payload_len, ENC_NA);
+ offset += payload_len;
+ }
+
+ if (!tsc) {
+ mp2t_process_fragmented_payload(tvb, offset, payload_len, pinfo, tree, mp2t_tree, pusi_flag, pid_analysis);
+ } else {
+ /* Payload is scrambled */
+ col_set_str(pinfo->cinfo, COL_INFO, "Scrambled TS payload");
+ }
}
static void
dissect_mp2t( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
{
- guint offset = 0;
+ guint offset = 0;
+ conversation_t *conv;
+
+ conv = find_or_create_conversation(pinfo);
+
+ for (; tvb_reported_length_remaining(tvb, offset) >= MP2T_PACKET_SIZE; offset += MP2T_PACKET_SIZE) {
+ dissect_tsp(tvb, offset, pinfo, tree, conv);
+ }
- if (tree) {
- while ( tvb_reported_length_remaining(tvb, offset) >= MP2T_PACKET_SIZE ) {
- offset = dissect_tsp( tvb, offset, pinfo, tree);
- }
- }
+}
+
+static gboolean
+heur_dissect_mp2t( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
+{
+ gint length;
+ guint offset = 0;
+
+ length = tvb_length_remaining(tvb, offset);
+ if (length == 0) {
+ /* Nothing to check for */
+ return FALSE;
+ }
+ if ((length % MP2T_PACKET_SIZE) != 0) {
+ /* Not a multiple of the MPEG-2 transport packet size */
+ return FALSE;
+ } else {
+ while (tvb_offset_exists(tvb, offset)) {
+ if (tvb_get_guint8(tvb, offset) != MP2T_SYNC_BYTE) {
+ /* No sync byte at the appropriate offset */
+ return FALSE;
+ }
+ offset += MP2T_PACKET_SIZE;
+ }
+ }
+
+ dissect_mp2t(tvb, pinfo, tree);
+ return TRUE;
+}
+
+
+static void
+mp2t_init(void) {
+ reassembly_table_init(&mp2t_reassembly_table,
+ &addresses_reassembly_table_functions);
}
void
proto_register_mp2t(void)
{
- static hf_register_info hf[] = {
- { &hf_mp2t_header, {
- "Header", "mp2t.header",
- FT_UINT32, BASE_HEX, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_sync_byte, {
- "Sync Byte", "mp2t.sync_byte",
- FT_UINT32, BASE_HEX, VALS(mp2t_sync_byte_vals), MP2T_SYNC_BYTE_MASK, "", HFILL
- } } ,
- { &hf_mp2t_tei, {
- "Transport Error Indicator", "mp2t.tei",
- FT_UINT32, BASE_DEC, NULL, MP2T_TEI_MASK, "", HFILL
- } } ,
- { &hf_mp2t_pusi, {
- "Payload Unit Start Indicator", "mp2s.pusi",
- FT_UINT32, BASE_DEC, NULL, MP2T_PUSI_MASK, "", HFILL
- } } ,
- { &hf_mp2t_tp, {
- "Transport Priority", "mp2t.tp",
- FT_UINT32, BASE_DEC, NULL, MP2T_TP_MASK, "", HFILL
- } } ,
- { &hf_mp2t_pid, {
- "PID", "mp2s.pid",
- FT_UINT32, BASE_HEX, VALS(mp2t_pid_vals), MP2T_PID_MASK, "", HFILL
- } } ,
- { &hf_mp2t_tsc, {
- "Transport Scrambling Control", "mp2t.tsc",
- FT_UINT32, BASE_HEX, VALS(mp2t_tsc_vals), MP2T_TSC_MASK, "", HFILL
- } } ,
- { &hf_mp2t_afc, {
- "Adaption Field Control", "mp2t.afc",
- FT_UINT32, BASE_HEX, VALS(mp2t_afc_vals) , MP2T_AFC_MASK, "", HFILL
- } } ,
- { &hf_mp2t_cc, {
- "Continuity Counter", "mp2t.cc",
- FT_UINT32, BASE_DEC, NULL, MP2T_CC_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af, {
- "Adaption field", "mp2t.af",
- FT_NONE, BASE_HEX, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_length, {
- "Adaptation Field Length", "mp2t.af.length",
- FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL
- } } ,
- { &hf_mp2t_af_di, {
- "Discontinuity Indicator", "mp2t.af.di",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_DI_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_rai, {
- "Random Access Indicator", "mp2t.af.rai",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_RAI_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_espi, {
- "Elementary Stream Priority Indicator", "mp2t.af.espi",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_ESPI_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_pcr_flag, {
- "PCR Flag", "mp2t.af.pcr_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_PCR_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_opcr_flag, {
- "OPCR Flag", "mp2t.af.opcr_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_OPCR_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_sp_flag, {
- "Splicing Point Flag", "mp2t.af.sp_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_SP_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_tpd_flag, {
- "Transport Private Data Flag", "mp2t.af.tpd_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_TPD_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_afe_flag, {
- "Adaptation Field Extension Flag", "mp2t.af.afe_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_AFE_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_pcr, {
- "Program Clock Reference", "mp2t.af.pcr",
- FT_NONE, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_opcr, {
- "Original Program Clock Reference", "mp2t.af.opcr",
- FT_NONE, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_sc, {
- "Splice Countdown", "mp2t.af.sc",
- FT_UINT8, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_tpd_length, {
- "Transport Private Data Length", "mp2t.af.tpd_length",
- FT_UINT8, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_tpd, {
- "Transport Private Data", "mp2t.af.tpd",
- FT_BYTES, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_e_length, {
- "Adaptation Field Extension Length", "mp2t.af.e_length",
- FT_UINT8, BASE_DEC, NULL, 0, "", HFILL
- } } ,
- { &hf_mp2t_af_e_ltw_flag, {
- "LTW Flag", "mp2t.af.e.ltw_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_LTW_FLAG_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_e_pr_flag, {
- "Piecewise Rate Flag", "mp2t.af.e.pr_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_PR_FLAG_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_e_ss_flag, {
- "Seamless Splice Flag", "mp2t.af.e.ss_flag",
- FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_SS_FLAG_MASK, "", HFILL
- } } ,
- { &hf_mp2t_af_e_reserved, {
- "Reserved", "mp2t.af.e.reserved",
- FT_UINT8, BASE_DEC, NULL, 0x1F, "", HFILL
- } } ,
- { &hf_mp2t_af_e_reserved_bytes, {
- "Reserved", "mp2t.af.e.reserved_bytes",
- FT_BYTES, BASE_DEC, NULL, 0x0, "", HFILL
- } } ,
- { &hf_mp2t_af_stuffing_bytes, {
- "Stuffing", "mp2t.af.stuffing_bytes",
- FT_BYTES, BASE_DEC, NULL, 0x0, "", HFILL
- } } ,
- { &hf_mp2t_af_e_ltwv_flag, {
- "LTW Valid Flag", "mp2t.af.e.ltwv_flag",
- FT_UINT16, BASE_DEC, NULL, 0x8000, "", HFILL
- } } ,
- { &hf_mp2t_af_e_ltwo, {
- "LTW Offset", "mp2t.af.e.ltwo",
- FT_UINT16, BASE_DEC, NULL, 0x7FFF, "", HFILL
- } } ,
- { &hf_mp2t_af_e_pr_reserved, {
- "Reserved", "mp2t.af.e.pr_reserved",
- FT_UINT24, BASE_DEC, NULL, 0xC00000, "", HFILL
- } } ,
- { &hf_mp2t_af_e_pr, {
- "Piecewise Rate", "mp2t.af.e.pr",
- FT_UINT24, BASE_DEC, NULL, 0x3FFFFF, "", HFILL
- } } ,
- { &hf_mp2t_af_e_st, {
- "Splice Type", "mp2t.af.e.st",
- FT_UINT8, BASE_DEC, NULL, 0xF0, "", HFILL
- } } ,
- { &hf_mp2t_af_e_dnau_32_30, {
- "DTS Next AU[32...30]", "mp2t.af.e.dnau_32_30",
- FT_UINT8, BASE_DEC, NULL, 0x0E, "", HFILL
- } } ,
- { &hf_mp2t_af_e_m_1, {
- "Marker Bit", "mp2t.af.e.m_1",
- FT_UINT8, BASE_DEC, NULL, 0x01, "", HFILL
- } } ,
- { &hf_mp2t_af_e_dnau_29_15, {
- "DTS Next AU[29...15]", "mp2t.af.e.dnau_29_15",
- FT_UINT16, BASE_DEC, NULL, 0xFFFE, "", HFILL
- } } ,
- { &hf_mp2t_af_e_m_2, {
- "Marker Bit", "mp2t.af.e.m_2",
- FT_UINT16, BASE_DEC, NULL, 0x0001, "", HFILL
- } } ,
- { &hf_mp2t_af_e_dnau_14_0, {
- "DTS Next AU[14...0]", "mp2t.af.e.dnau_14_0",
- FT_UINT16, BASE_DEC, NULL, 0xFFFE, "", HFILL
- } } ,
- { &hf_mp2t_af_e_m_3, {
- "Marker Bit", "mp2t.af.e.m_3",
- FT_UINT16, BASE_DEC, NULL, 0x0001, "", HFILL
- } } ,
- { &hf_mp2t_payload, {
- "Payload", "mp2t.payload",
- FT_BYTES, BASE_DEC, NULL, 0x0, "", HFILL
- } } ,
- };
-
- static gint *ett[] =
- {
- &ett_mp2t,
- };
-
- proto_mp2t = proto_register_protocol("ISO/IEC 13818-1", "MP2T", "mp2t");
- proto_register_field_array(proto_mp2t, hf, array_length(hf));
- proto_register_subtree_array(ett, array_length(ett));
+ static hf_register_info hf[] = {
+ { &hf_mp2t_header, {
+ "Header", "mp2t.header",
+ FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_sync_byte, {
+ "Sync Byte", "mp2t.sync_byte",
+ FT_UINT32, BASE_HEX, VALS(mp2t_sync_byte_vals), MP2T_SYNC_BYTE_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_tei, {
+ "Transport Error Indicator", "mp2t.tei",
+ FT_UINT32, BASE_DEC, NULL, MP2T_TEI_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_pusi, {
+ "Payload Unit Start Indicator", "mp2t.pusi",
+ FT_UINT32, BASE_DEC, NULL, MP2T_PUSI_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_tp, {
+ "Transport Priority", "mp2t.tp",
+ FT_UINT32, BASE_DEC, NULL, MP2T_TP_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_pid, {
+ "PID", "mp2t.pid",
+ FT_UINT32, BASE_HEX, VALS(mp2t_pid_vals), MP2T_PID_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_tsc, {
+ "Transport Scrambling Control", "mp2t.tsc",
+ FT_UINT32, BASE_HEX, VALS(mp2t_tsc_vals), MP2T_TSC_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_afc, {
+ "Adaptation Field Control", "mp2t.afc",
+ FT_UINT32, BASE_HEX, VALS(mp2t_afc_vals) , MP2T_AFC_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_cc, {
+ "Continuity Counter", "mp2t.cc",
+ FT_UINT32, BASE_DEC, NULL, MP2T_CC_MASK, NULL, HFILL
+ } } ,
+#if 0
+ { &hf_mp2t_analysis_flags, {
+ "MPEG2-TS Analysis Flags", "mp2t.analysis.flags",
+ FT_NONE, BASE_NONE, NULL, 0x0,
+ "This frame has some of the MPEG2 analysis flags set", HFILL
+ } } ,
+#endif
+ { &hf_mp2t_analysis_skips, {
+ "TS Continuity Counter Skips", "mp2t.analysis.skips",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Missing TS frames according to CC counter values", HFILL
+ } } ,
+ { &hf_mp2t_analysis_drops, {
+ "Some frames dropped", "mp2t.analysis.drops",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Discontinuity: A number of TS frames were dropped", HFILL
+ } } ,
+ { &hf_mp2t_af, {
+ "Adaptation Field", "mp2t.af",
+ FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_length, {
+ "Adaptation Field Length", "mp2t.af.length",
+ FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_di, {
+ "Discontinuity Indicator", "mp2t.af.di",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_DI_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_rai, {
+ "Random Access Indicator", "mp2t.af.rai",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_RAI_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_espi, {
+ "Elementary Stream Priority Indicator", "mp2t.af.espi",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_ESPI_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_pcr_flag, {
+ "PCR Flag", "mp2t.af.pcr_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_PCR_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_opcr_flag, {
+ "OPCR Flag", "mp2t.af.opcr_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_OPCR_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_sp_flag, {
+ "Splicing Point Flag", "mp2t.af.sp_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_SP_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_tpd_flag, {
+ "Transport Private Data Flag", "mp2t.af.tpd_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_TPD_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_afe_flag, {
+ "Adaptation Field Extension Flag", "mp2t.af.afe_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_AFE_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_pcr, {
+ "Program Clock Reference", "mp2t.af.pcr",
+ FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_opcr, {
+ "Original Program Clock Reference", "mp2t.af.opcr",
+ FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_sc, {
+ "Splice Countdown", "mp2t.af.sc",
+ FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_tpd_length, {
+ "Transport Private Data Length", "mp2t.af.tpd_length",
+ FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_tpd, {
+ "Transport Private Data", "mp2t.af.tpd",
+ FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_length, {
+ "Adaptation Field Extension Length", "mp2t.af.e_length",
+ FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_ltw_flag, {
+ "LTW Flag", "mp2t.af.e.ltw_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_LTW_FLAG_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_pr_flag, {
+ "Piecewise Rate Flag", "mp2t.af.e.pr_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_PR_FLAG_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_ss_flag, {
+ "Seamless Splice Flag", "mp2t.af.e.ss_flag",
+ FT_UINT8, BASE_DEC, NULL, MP2T_AF_E_SS_FLAG_MASK, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_reserved, {
+ "Reserved", "mp2t.af.e.reserved",
+ FT_UINT8, BASE_DEC, NULL, 0x1F, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_reserved_bytes, {
+ "Reserved", "mp2t.af.e.reserved_bytes",
+ FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_stuffing_bytes, {
+ "Stuffing", "mp2t.af.stuffing_bytes",
+ FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_ltwv_flag, {
+ "LTW Valid Flag", "mp2t.af.e.ltwv_flag",
+ FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_ltwo, {
+ "LTW Offset", "mp2t.af.e.ltwo",
+ FT_UINT16, BASE_DEC, NULL, 0x7FFF, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_pr_reserved, {
+ "Reserved", "mp2t.af.e.pr_reserved",
+ FT_UINT24, BASE_DEC, NULL, 0xC00000, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_pr, {
+ "Piecewise Rate", "mp2t.af.e.pr",
+ FT_UINT24, BASE_DEC, NULL, 0x3FFFFF, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_st, {
+ "Splice Type", "mp2t.af.e.st",
+ FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_dnau_32_30, {
+ "DTS Next AU[32...30]", "mp2t.af.e.dnau_32_30",
+ FT_UINT8, BASE_DEC, NULL, 0x0E, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_m_1, {
+ "Marker Bit", "mp2t.af.e.m_1",
+ FT_UINT8, BASE_DEC, NULL, 0x01, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_dnau_29_15, {
+ "DTS Next AU[29...15]", "mp2t.af.e.dnau_29_15",
+ FT_UINT16, BASE_DEC, NULL, 0xFFFE, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_m_2, {
+ "Marker Bit", "mp2t.af.e.m_2",
+ FT_UINT16, BASE_DEC, NULL, 0x0001, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_dnau_14_0, {
+ "DTS Next AU[14...0]", "mp2t.af.e.dnau_14_0",
+ FT_UINT16, BASE_DEC, NULL, 0xFFFE, NULL, HFILL
+ } } ,
+ { &hf_mp2t_af_e_m_3, {
+ "Marker Bit", "mp2t.af.e.m_3",
+ FT_UINT16, BASE_DEC, NULL, 0x0001, NULL, HFILL
+ } } ,
+#if 0
+ { &hf_mp2t_payload, {
+ "Payload", "mp2t.payload",
+ FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
+ } } ,
+#endif
+ { &hf_mp2t_stuff_bytes, {
+ "Stuffing", "mp2t.stuff_bytes",
+ FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
+ } },
+ { &hf_mp2t_pointer, {
+ "Pointer", "mp2t.pointer",
+ FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
+ } },
+ { &hf_msg_fragments, {
+ "Message fragments", "mp2t.msg.fragments",
+ FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment, {
+ "Message fragment", "mp2t.msg.fragment",
+ FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_overlap, {
+ "Message fragment overlap", "mp2t.msg.fragment.overlap",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_overlap_conflicts, {
+ "Message fragment overlapping with conflicting data",
+ "mp2t.msg.fragment.overlap.conflicts",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_multiple_tails, {
+ "Message has multiple tail fragments",
+ "mp2t.msg.fragment.multiple_tails",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_too_long_fragment, {
+ "Message fragment too long", "mp2t.msg.fragment.too_long_fragment",
+ FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_error, {
+ "Message defragmentation error", "mp2t.msg.fragment.error",
+ FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_fragment_count, {
+ "Message fragment count", "mp2t.msg.fragment.count",
+ FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_reassembled_in, {
+ "Reassembled in", "mp2t.msg.reassembled.in",
+ FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL
+ } },
+ { &hf_msg_reassembled_length, {
+ "Reassembled MP2T length", "mp2t.msg.reassembled.length",
+ FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL
+ } }
+ };
+
+ static gint *ett[] =
+ {
+ &ett_mp2t,
+ &ett_mp2t_header,
+ &ett_mp2t_af,
+ &ett_mp2t_analysis,
+ &ett_stuff,
+ &ett_msg_fragment,
+ &ett_msg_fragments
+ };
+
+ static ei_register_info ei[] = {
+ { &ei_mp2t_pointer, { "mp2t.pointer", PI_MALFORMED, PI_ERROR, "Pointer value is too large", EXPFILL }},
+ { &ei_mp2t_cc_drop, { "mp2t.cc.drop", PI_MALFORMED, PI_ERROR, "Detected missing TS frames", EXPFILL }},
+ };
+
+ expert_module_t* expert_mp2t;
+
+ proto_mp2t = proto_register_protocol("ISO/IEC 13818-1", "MP2T", "mp2t");
+
+ mp2t_handle = register_dissector("mp2t", dissect_mp2t, proto_mp2t);
+
+ proto_register_field_array(proto_mp2t, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ expert_mp2t = expert_register_protocol(proto_mp2t);
+ expert_register_field_array(expert_mp2t, ei, array_length(ei));
+
+ register_heur_dissector_list("mp2t.pid", &heur_subdissector_list);
+ /* Register init of processing of fragmented DEPI packets */
+ register_init_routine(mp2t_init);
}
void
proto_reg_handoff_mp2t(void)
{
- dissector_handle_t mp2t_handle;
+ heur_dissector_add("udp", heur_dissect_mp2t, proto_mp2t);
+
+ dissector_add_uint("rtp.pt", PT_MP2T, mp2t_handle);
+ dissector_add_handle("udp.port", mp2t_handle); /* for decode-as */
+ heur_dissector_add("usb.bulk", heur_dissect_mp2t, proto_mp2t);
+ dissector_add_uint("wtap_encap", WTAP_ENCAP_MPEG_2_TS, mp2t_handle);
- mp2t_handle = create_dissector_handle(dissect_mp2t, proto_mp2t);
- dissector_add("rtp.pt", PT_MP2T, mp2t_handle);
+ docsis_handle = find_dissector("docsis");
+ mpeg_pes_handle = find_dissector("mpeg-pes");
+ mpeg_sect_handle = find_dissector("mpeg_sect");
+ data_handle = find_dissector("data");
}
+/*
+ * Editor modelines - http://www.wireshark.org/tools/modelines.html
+ *
+ * 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:
+ */
git.samba.org / metze / wireshark / wip.git / blobdiff