2 * Routines for ETSI Distribution & Communication Protocol
3 * Copyright 2006, British Broadcasting Corporation
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 * Ref: ETSI DCP (ETSI TS 102 821)
34 #include <epan/packet.h>
35 #include <epan/prefs.h>
36 #include <epan/reassemble.h>
37 #include <epan/crcdrm.h>
38 #include <epan/reedsolomon.h>
39 #include <epan/emem.h>
42 /* forward reference */
44 static gboolean dissect_dcp_etsi (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree);
45 static void dissect_af (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree);
46 static void dissect_pft (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree);
47 static void dissect_tpl(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree);
49 static dissector_table_t dcp_dissector_table;
50 static dissector_table_t af_dissector_table;
51 static dissector_table_t tpl_dissector_table;
53 static int proto_dcp_etsi = -1;
54 static int proto_af = -1;
55 static int proto_pft = -1;
56 static int proto_tpl = -1;
57 static dissector_handle_t af_handle;
58 static dissector_handle_t pft_handle;
59 static dissector_handle_t tpl_handle;
60 static int hf_edcp_sync = -1;
61 static int hf_edcp_len = -1;
62 static int hf_edcp_seq = -1;
63 static int hf_edcp_crcflag = -1;
64 static int hf_edcp_maj = -1;
65 static int hf_edcp_min = -1;
66 static int hf_edcp_pt = -1;
67 static int hf_edcp_crc = -1;
68 static int hf_edcp_crc_ok = -1;
69 static int hf_edcp_pft_pt = -1;
70 static int hf_edcp_pseq = -1;
71 static int hf_edcp_findex = -1;
72 static int hf_edcp_fcount = -1;
73 static int hf_edcp_fecflag = -1;
74 static int hf_edcp_addrflag = -1;
75 static int hf_edcp_plen = -1;
76 static int hf_edcp_rsk = -1;
77 static int hf_edcp_rsz = -1;
78 static int hf_edcp_source = -1;
79 static int hf_edcp_dest = -1;
80 static int hf_edcp_hcrc = -1;
81 static int hf_edcp_hcrc_ok = -1;
82 static int hf_edcp_c_max = -1;
83 static int hf_edcp_rx_min = -1;
84 static int hf_edcp_rs_corrected = -1;
85 static int hf_edcp_rs_ok = -1;
86 static int hf_edcp_pft_payload = -1;
88 static int hf_tpl_tlv = -1;
89 static int hf_tpl_ptr = -1;
91 static int hf_edcp_fragments = -1;
92 static int hf_edcp_fragment = -1;
93 static int hf_edcp_fragment_overlap = -1;
94 static int hf_edcp_fragment_overlap_conflicts = -1;
95 static int hf_edcp_fragment_multiple_tails = -1;
96 static int hf_edcp_fragment_too_long_fragment = -1;
97 static int hf_edcp_fragment_error = -1;
98 static int hf_edcp_reassembled_in = -1;
100 /* Initialize the subtree pointers */
101 static gint ett_edcp = -1;
102 static gint ett_af = -1;
103 static gint ett_pft = -1;
104 static gint ett_tpl = -1;
105 static gint ett_edcp_fragment = -1;
106 static gint ett_edcp_fragments = -1;
108 static GHashTable *dcp_fragment_table = NULL;
109 static GHashTable *dcp_reassembled_table = NULL;
111 static const fragment_items dcp_frag_items = {
112 /* Fragment subtrees */
115 /* Fragment fields */
118 &hf_edcp_fragment_overlap,
119 &hf_edcp_fragment_overlap_conflicts,
120 &hf_edcp_fragment_multiple_tails,
121 &hf_edcp_fragment_too_long_fragment,
122 &hf_edcp_fragment_error,
123 /* Reassembled in field */
124 &hf_edcp_reassembled_in,
129 /** initialise the DCP protocol. Details follow
133 dcp_init_protocol(void)
135 fragment_table_init (&dcp_fragment_table);
136 reassembled_table_init (&dcp_reassembled_table);
140 /** Dissect a DCP packet. Details follow
142 * \param[in,out] tvb The buffer containing the packet
143 * \param[in,out] pinfo The packet info structure
144 * \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
148 dissect_dcp_etsi (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
151 proto_tree *dcp_tree = NULL;
152 sync = tvb_get_ephemeral_string (tvb, 0, 2);
153 if((sync[0]!='A' && sync[0]!='P') || sync[1]!='F')
156 pinfo->current_proto = "DCP (ETSI)";
158 /* Clear out stuff in the info column */
159 if (check_col (pinfo->cinfo, COL_INFO)) {
160 col_clear (pinfo->cinfo, COL_INFO);
162 if (check_col (pinfo->cinfo, COL_PROTOCOL)) {
163 col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCP (ETSI)");
164 /*col_append_fstr (pinfo->cinfo, COL_INFO, " tvb %d", tvb_length(tvb));*/
168 proto_item *ti = NULL;
169 ti = proto_tree_add_item (tree, proto_dcp_etsi, tvb, 0, -1, FALSE);
170 dcp_tree = proto_item_add_subtree (ti, ett_edcp);
173 dissector_try_string(dcp_dissector_table, (char*)sync, tvb, pinfo, dcp_tree);
177 #define PFT_RS_N_MAX 207
179 #define PFT_RS_P (PFT_RS_K - PFT_RS_N_MAX)
183 void rs_deinterleave(const guint8 *input, guint8 *output, guint16 plen, guint32 fcount)
186 for(fidx=0; fidx<fcount; fidx++)
189 for (r=0; r<plen; r++)
191 output[fidx+r*fcount] = input[fidx*plen+r];
197 gboolean rs_correct_data(guint8 *deinterleaved, guint8 *output,
198 guint32 c_max, guint16 rsk, guint16 rsz _U_)
200 guint32 i, index_coded = 0, index_out = 0;
202 for (i=0; i<c_max; i++)
204 memcpy(output+index_out, deinterleaved+index_coded, rsk);
206 memcpy(output+index_out+PFT_RS_N_MAX, deinterleaved+index_coded, PFT_RS_P);
207 index_coded += PFT_RS_P;
208 err_corr = eras_dec_rs(output+index_out, NULL, 0);
217 /* Don't attempt reassembly if we have a huge number of fragments. */
218 #define MAX_FRAGMENTS ((1 * 1024 * 1024) / sizeof(guint32))
221 dissect_pft_fec_detailed(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
233 guint16 decoded_size;
236 gboolean first, last;
237 tvbuff_t *new_tvb=NULL;
239 if (fcount > MAX_FRAGMENTS) {
241 proto_tree_add_text(tree, tvb , 0, -1, "[Reassembly of %d fragments not attempted]", fcount);
246 last = fcount == (findex+1);
247 decoded_size = fcount*plen;
248 c_max = fcount*plen/(rsk+PFT_RS_P); /* rounded down */
249 rx_min = c_max*rsk/plen;
250 if(rx_min*plen<c_max*rsk)
253 new_tvb = process_reassembled_data (tvb, offset, pinfo,
254 "Reassembled Message",
261 fragment_data *fd_head;
264 proto_tree_add_text (tree, tvb, 0, -1, "want %d, got %d need %d",
265 fcount, fragments, rx_min
267 got = ep_alloc(fcount*sizeof(guint32));
269 /* make a list of the findex (offset) numbers of the fragments we have */
270 fd = fragment_get(pinfo, seq, dcp_fragment_table);
271 for (fd_head = fd; fd_head != NULL; fd_head = fd_head->next) {
273 got[fragments++] = fd_head->offset; /* this is the findex of the fragment */
276 /* put a sentinel at the end */
277 got[fragments++] = fcount;
278 /* have we got enough for Reed Solomon to try to correct ? */
279 if(fragments>=rx_min) { /* yes, in theory */
280 guint i,current_findex;
281 fragment_data *frag=NULL;
282 guint8 *dummy_data = (guint8*) ep_alloc0 (plen);
283 tvbuff_t *dummytvb = tvb_new_real_data(dummy_data, plen, plen);
284 /* try and decode with missing fragments */
286 proto_tree_add_text (tree, tvb, 0, -1, "want %d, got %d need %d",
287 fcount, fragments, rx_min
289 /* fill the fragment table with empty fragments */
291 for(i=0; i<fragments; i++) {
292 guint next_fragment_we_have = got[i];
293 for(; current_findex<next_fragment_we_have; current_findex++) {
294 frag = fragment_add_seq_check (dummytvb, 0, pinfo, seq,
295 dcp_fragment_table, dcp_reassembled_table, current_findex, plen, (current_findex+1!=fcount));
297 current_findex++; /* skip over the fragment we have */
300 new_tvb = process_reassembled_data (tvb, offset, pinfo,
301 "Reassembled Message",
302 frag, &dcp_frag_items,
307 gboolean decoded = TRUE;
308 tvbuff_t *dtvb = NULL;
309 const guint8 *input = tvb_get_ptr(new_tvb, 0, -1);
310 guint16 reassembled_size = tvb_length(new_tvb);
311 guint8 *deinterleaved = (guint8*) g_malloc (reassembled_size);
312 guint8 *output = (guint8*) g_malloc (decoded_size);
313 rs_deinterleave(input, deinterleaved, plen, fcount);
315 dtvb = tvb_new_real_data(deinterleaved, reassembled_size, reassembled_size);
316 tvb_set_child_real_data_tvbuff(tvb, dtvb);
317 add_new_data_source(pinfo, dtvb, "Deinterleaved");
318 tvb_set_free_cb(dtvb, g_free);
320 decoded = rs_correct_data(deinterleaved, output, c_max, rsk, rsz);
322 proto_tree_add_boolean (tree, hf_edcp_rs_ok, tvb, offset, 2, decoded);
324 new_tvb = tvb_new_real_data(output, decoded_size, decoded_size);
325 tvb_set_child_real_data_tvbuff(dtvb, new_tvb);
326 add_new_data_source(pinfo, new_tvb, "RS Error Corrected Data");
327 tvb_set_free_cb(new_tvb, g_free);
333 /** Handle a PFT packet which has the fragmentation header. This uses the
334 * standard wireshark methods for reassembling fragments. If FEC is used,
335 * the FEC is handled too. For the moment, all the fragments must be
336 * available but this could be improved.
337 * \param[in,out] tvb The buffer containing the current fragment
338 * \param[in,out] pinfo The packet info structure
339 * \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
340 * \param[in] findex the fragment count
341 * \param[in] fcount the number of fragments
342 * \param[in] seq the sequence number of the reassembled packet
343 * \param[in] offset the offset into the tvb of the fragment
344 * \param[in] plen the length of each fragment
345 * \param[in] fec is fec used
346 * \param[in] rsk the number of useful bytes in each chunk
347 * \param[in] rsz the number of padding bytes in each chunk
350 dissect_pft_fragmented(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
361 gboolean first, last;
362 tvbuff_t *new_tvb=NULL;
363 fragment_data *frag_edcp = NULL;
364 pinfo->fragmented = TRUE;
366 last = fcount == (findex+1);
367 frag_edcp = fragment_add_seq_check (
370 dcp_fragment_table, dcp_reassembled_table,
375 new_tvb = dissect_pft_fec_detailed(
376 tvb, pinfo, tree, findex, fcount, seq, offset, plen, fec, rsk, rsz, frag_edcp
379 new_tvb = process_reassembled_data (tvb, offset, pinfo,
380 "Reassembled Message",
381 frag_edcp, &dcp_frag_items,
384 if (check_col (pinfo->cinfo, COL_INFO)) {
386 col_append_str (pinfo->cinfo, COL_INFO, " (Message Reassembled)");
389 col_append_str (pinfo->cinfo, COL_INFO, " (Message Reassembly failure)");
391 col_append_fstr (pinfo->cinfo, COL_INFO, " (Message fragment %u)", findex);
395 col_append_str (pinfo->cinfo, COL_INFO, " (first)");
397 col_append_str (pinfo->cinfo, COL_INFO, " (last)");
402 /** Dissect a PFT packet. Details follow
404 * \param[in,out] tvb The buffer containing the packet
405 * \param[in,out] pinfo The packet info structure
406 * \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
409 dissect_pft(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
413 guint16 seq, payload_len, hcrc;
414 guint32 findex, fcount;
415 proto_tree *pft_tree = NULL;
416 proto_item *ti = NULL, *li = NULL;
417 tvbuff_t *next_tvb = NULL;
418 gboolean fec = FALSE;
419 guint16 rsk=0, rsz=0;
421 pinfo->current_proto = "DCP-PFT";
422 if (check_col (pinfo->cinfo, COL_PROTOCOL)) {
423 col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCP-PFT");
426 if (tree) { /* we are being asked for details */
427 ti = proto_tree_add_item (tree, proto_pft, tvb, 0, -1, FALSE);
428 pft_tree = proto_item_add_subtree (ti, ett_pft);
429 proto_tree_add_item (pft_tree, hf_edcp_sync, tvb, offset, 2, FALSE);
432 seq = tvb_get_ntohs (tvb, offset);
434 proto_tree_add_item (pft_tree, hf_edcp_pseq, tvb, offset, 2, FALSE);
437 findex = tvb_get_ntoh24 (tvb, offset);
439 proto_tree_add_item (pft_tree, hf_edcp_findex, tvb, offset, 3, FALSE);
442 fcount = tvb_get_ntoh24 (tvb, offset);
444 proto_tree_add_item (pft_tree, hf_edcp_fcount, tvb, offset, 3, FALSE);
447 plen = tvb_get_ntohs (tvb, offset);
448 payload_len = plen & 0x3fff;
450 proto_tree_add_item (pft_tree, hf_edcp_fecflag, tvb, offset, 2, FALSE);
451 proto_tree_add_item (pft_tree, hf_edcp_addrflag, tvb, offset, 2, FALSE);
452 li = proto_tree_add_item (pft_tree, hf_edcp_plen, tvb, offset, 2, FALSE);
457 rsk = tvb_get_guint8 (tvb, offset);
459 proto_tree_add_item (pft_tree, hf_edcp_rsk, tvb, offset, 1, FALSE);
461 rsz = tvb_get_guint8 (tvb, offset);
463 proto_tree_add_item (pft_tree, hf_edcp_rsz, tvb, offset, 1, FALSE);
468 proto_tree_add_item (pft_tree, hf_edcp_source, tvb, offset, 2, FALSE);
471 proto_tree_add_item (pft_tree, hf_edcp_dest, tvb, offset, 2, FALSE);
475 proto_item *ci = NULL;
476 guint header_len = offset+2;
477 const char *crc_buf = (const char *) tvb_get_ptr(tvb, 0, header_len);
478 unsigned long c = crc_drm(crc_buf, header_len, 16, 0x11021, 1);
479 ci = proto_tree_add_item (pft_tree, hf_edcp_hcrc, tvb, offset, 2, FALSE);
480 proto_item_append_text(ci, " (%s)", (c==0xe2f0)?"Ok":"bad");
481 proto_tree_add_boolean(pft_tree, hf_edcp_hcrc_ok, tvb, offset, 2, c==0xe2f0);
483 hcrc = tvb_get_ntohs (tvb, offset);
485 if (fcount > 1) { /* fragmented*/
486 gboolean save_fragmented = pinfo->fragmented;
487 guint16 real_len = tvb_length(tvb)-offset;
488 proto_tree_add_item (pft_tree, hf_edcp_pft_payload, tvb, offset, real_len, FALSE);
489 if(real_len != payload_len) {
491 proto_item_append_text(li, " (length error (%d))", real_len);
493 next_tvb = dissect_pft_fragmented(tvb, pinfo, pft_tree,
494 findex, fcount, seq, offset, real_len,
497 pinfo->fragmented = save_fragmented;
499 next_tvb = tvb_new_subset (tvb, offset, -1, -1);
502 dissect_af(next_tvb, pinfo, tree);
506 /** Dissect an AF Packet. Parse an AF packet, checking the CRC if the CRC valid
507 * flag is set and calling any registered sub dissectors on the payload type.
508 * Currently only a payload type 'T' is defined which is the tag packet layer.
509 * If any others are defined then they can register themselves.
510 * \param[in,out] tvb The buffer containing the packet
511 * \param[in,out] pinfo The packet info structure
512 * \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
515 dissect_af (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
518 proto_item *ti = NULL;
519 proto_item *li = NULL;
520 proto_item *ci = NULL;
521 proto_tree *af_tree = NULL;
524 tvbuff_t *next_tvb = NULL;
526 pinfo->current_proto = "DCP-AF";
527 if (check_col (pinfo->cinfo, COL_PROTOCOL)) {
528 col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCP-AF");
531 if (tree) { /* we are being asked for details */
532 ti = proto_tree_add_item (tree, proto_af, tvb, 0, -1, FALSE);
533 af_tree = proto_item_add_subtree (ti, ett_af);
534 proto_tree_add_item (af_tree, hf_edcp_sync, tvb, offset, 2, FALSE);
537 payload_len = tvb_get_ntohl(tvb, offset);
539 guint32 real_payload_len = tvb_length(tvb)-12;
540 li = proto_tree_add_item (af_tree, hf_edcp_len, tvb, offset, 4, FALSE);
541 if(real_payload_len < payload_len) {
542 proto_item_append_text (li, " (wrong len claims %d is %d)",
543 payload_len, real_payload_len
545 } else if(real_payload_len > payload_len) {
546 proto_item_append_text (li, " (%d bytes in packet after end of AF frame)",
547 real_payload_len-payload_len
553 proto_tree_add_item (af_tree, hf_edcp_seq, tvb, offset, 2, FALSE);
555 ver = tvb_get_guint8 (tvb, offset);
557 proto_tree_add_item (af_tree, hf_edcp_crcflag, tvb, offset, 1, FALSE);
558 proto_tree_add_item (af_tree, hf_edcp_maj, tvb, offset, 1, FALSE);
559 proto_tree_add_item (af_tree, hf_edcp_min, tvb, offset, 1, FALSE);
562 pt = tvb_get_guint8 (tvb, offset);
564 proto_tree_add_item (af_tree, hf_edcp_pt, tvb, offset, 1, FALSE);
566 next_tvb = tvb_new_subset (tvb, offset, payload_len, -1);
567 offset += payload_len;
569 ci = proto_tree_add_item (af_tree, hf_edcp_crc, tvb, offset, 2, FALSE);
570 if (ver & 0x80) { /* crc valid */
571 guint len = offset+2;
572 const char *crc_buf = (const char *) tvb_get_ptr(tvb, 0, len);
573 unsigned long c = crc_drm(crc_buf, len, 16, 0x11021, 1);
575 proto_item_append_text(ci, " (%s)", (c==0xe2f0)?"Ok":"bad");
576 proto_tree_add_boolean(af_tree, hf_edcp_crc_ok, tvb, offset, 2, c==0xe2f0);
580 dissector_try_port(af_dissector_table, pt, next_tvb, pinfo, tree);
583 /** Dissect the Tag Packet Layer.
584 * Split the AF packet into its tag items. Each tag item has a 4 character
585 * tag, a length in bits and a value. The *ptr tag is dissected in the routine.
586 * All other tags are listed and may be handled by other dissectors.
587 * Child dissectors are tied to the parent tree, not to this tree, so that
588 * they appear at the same level as DCP.
589 * \param[in,out] tvb The buffer containing the packet
590 * \param[in,out] pinfo The packet info structure
591 * \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
594 dissect_tpl(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
596 proto_tree *tpl_tree = NULL;
601 pinfo->current_proto = "DCP-TPL";
602 if (check_col (pinfo->cinfo, COL_PROTOCOL)) {
603 col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCP-TPL");
607 proto_item *ti = NULL;
608 ti = proto_tree_add_item (tree, proto_tpl, tvb, 0, -1, FALSE);
609 tpl_tree = proto_item_add_subtree (ti, ett_tpl);
611 while(offset<tvb_length(tvb)) {
614 char *tag = (char*)tvb_get_ephemeral_string (tvb, offset, 4); offset += 4;
615 bits = tvb_get_ntohl(tvb, offset); offset += 4;
620 proto_item *i = NULL;
621 const guint8 *p = tvb_get_ptr(tvb, offset, bytes);
622 if(strcmp(tag, "*ptr")==0) {
623 prot = (char*)tvb_get_ephemeral_string (tvb, offset, 4);
624 maj = tvb_get_ntohs(tvb, offset+4);
625 min = tvb_get_ntohs(tvb, offset+6);
626 i = proto_tree_add_bytes_format(tpl_tree, hf_tpl_tlv, tvb,
627 offset-8, bytes+8, p, "%s %s rev %d.%d", tag, prot, maj, min);
629 i = proto_tree_add_bytes_format(tpl_tree, hf_tpl_tlv, tvb,
630 offset-8, bytes+8, p, "%s (%u bits)", tag, bits);
635 if(prot) { /* prot is non-NULL only if we have our tree. */
636 dissector_try_string(tpl_dissector_table, prot, tvb, pinfo, tree->parent);
641 proto_reg_handoff_dcp_etsi (void)
643 static int Initialized = FALSE;
646 af_handle = create_dissector_handle(dissect_af, proto_af);
647 pft_handle = create_dissector_handle(dissect_pft, proto_pft);
648 tpl_handle = create_dissector_handle(dissect_tpl, proto_tpl);
649 heur_dissector_add("udp", dissect_dcp_etsi, proto_dcp_etsi);
650 dissector_add_string("dcp-etsi.sync", "AF", af_handle);
651 dissector_add_string("dcp-etsi.sync", "PF", pft_handle);
652 /* if there are ever other payload types ...*/
653 dissector_add("dcp-af.pt", 'T', tpl_handle);
658 proto_register_dcp_etsi (void)
660 module_t *dcp_module;
661 static hf_register_info hf_edcp[] = {
663 {"sync", "dcp-etsi.sync",
664 FT_STRING, BASE_NONE, NULL, 0,
668 static hf_register_info hf_af[] = {
670 {"length", "dcp-af.len",
671 FT_UINT32, BASE_DEC, NULL, 0,
672 "length in bytes of the payload", HFILL}
675 {"frame count", "dcp-af.seq",
676 FT_UINT16, BASE_DEC, NULL, 0,
677 "Logical Frame Number", HFILL}
680 {"crc flag", "dcp-af.crcflag",
681 FT_BOOLEAN, BASE_NONE, NULL, 0x80,
682 "Frame is protected by CRC", HFILL}
685 {"Major Revision", "dcp-af.maj",
686 FT_UINT8, BASE_DEC, NULL, 0x70,
687 "Major Protocol Revision", HFILL}
690 {"Minor Revision", "dcp-af.min",
691 FT_UINT8, BASE_DEC, NULL, 0x0f,
692 "Minor Protocol Revision", HFILL}
695 {"Payload Type", "dcp-af.pt",
696 FT_STRING, BASE_NONE, NULL, 0,
697 "T means Tag Packets, all other values reserved", HFILL}
700 {"CRC", "dcp-af.crc",
701 FT_UINT16, BASE_HEX, NULL, 0,
705 {"CRC OK", "dcp-af.crc_ok",
706 FT_BOOLEAN, BASE_NONE, NULL, 0,
711 static hf_register_info hf_pft[] = {
713 {"Sub-protocol", "dcp-pft.pt",
714 FT_UINT8, BASE_DEC, NULL, 0,
718 {"Sequence No", "dcp-pft.seq",
719 FT_UINT16, BASE_DEC, NULL, 0,
720 "PFT Sequence No", HFILL}
723 {"Fragment Index", "dcp-pft.findex",
724 FT_UINT24, BASE_DEC, NULL, 0,
725 "Index of the fragment within one AF Packet", HFILL}
728 {"Fragment Count", "dcp-pft.fcount",
729 FT_UINT24, BASE_DEC, NULL, 0,
730 "Number of fragments produced from this AF Packet", HFILL}
733 {"FEC", "dcp-pft.fec",
734 FT_BOOLEAN, BASE_NONE, NULL, 0x8000,
735 "When set the optional RS header is present", HFILL}
738 {"Addr", "dcp-pft.addr",
739 FT_BOOLEAN, BASE_NONE, NULL, 0x4000,
740 "When set the optional transport header is present", HFILL}
743 {"fragment length", "dcp-pft.len",
744 FT_UINT16, BASE_DEC, NULL, 0x3fff,
745 "length in bytes of the payload of this fragment", HFILL}
748 {"RSk", "dcp-pft.rsk",
749 FT_UINT8, BASE_DEC, NULL, 0,
750 "The length of the Reed Solomon data word", HFILL}
753 {"RSz", "dcp-pft.rsz",
754 FT_UINT8, BASE_DEC, NULL, 0,
755 "The number of padding bytes in the last Reed Solomon block", HFILL}
758 {"source addr", "dcp-pft.source",
759 FT_UINT16, BASE_DEC, NULL, 0,
760 "PFT source identifier", HFILL}
763 {"dest addr", "dcp-pft.dest",
764 FT_UINT16, BASE_DEC, NULL, 0,
765 "PFT destination identifier", HFILL}
768 {"header CRC", "dcp-pft.crc",
769 FT_UINT16, BASE_HEX, NULL, 0,
770 "PFT Header CRC", HFILL}
773 {"PFT CRC OK", "dcp-pft.crc_ok",
774 FT_BOOLEAN, BASE_NONE, NULL, 0,
775 "PFT Header CRC OK", HFILL}
778 {"Message fragments", "dcp-pft.fragments",
779 FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL}},
781 {"Message fragment", "dcp-pft.fragment",
782 FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}},
783 {&hf_edcp_fragment_overlap,
784 {"Message fragment overlap", "dcp-pft.fragment.overlap",
785 FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL}},
786 {&hf_edcp_fragment_overlap_conflicts,
787 {"Message fragment overlapping with conflicting data",
788 "dcp-pft.fragment.overlap.conflicts",
789 FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL}},
790 {&hf_edcp_fragment_multiple_tails,
791 {"Message has multiple tail fragments",
792 "dcp-pft.fragment.multiple_tails",
793 FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL}},
794 {&hf_edcp_fragment_too_long_fragment,
795 {"Message fragment too long", "dcp-pft.fragment.too_long_fragment",
796 FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL}},
797 {&hf_edcp_fragment_error,
798 {"Message defragmentation error", "dcp-pft.fragment.error",
799 FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}},
800 {&hf_edcp_reassembled_in,
801 {"Reassembled in", "dcp-pft.reassembled.in",
802 FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}},
804 {"C max", "dcp-pft.cmax",
805 FT_UINT16, BASE_DEC, NULL, 0,
806 "Maximum number of RS chunks sent", HFILL}
809 {"Rx min", "dcp-pft.rxmin",
810 FT_UINT16, BASE_DEC, NULL, 0,
811 "Minimum number of fragments needed for RS decode", HFILL}
813 {&hf_edcp_rs_corrected,
814 {"RS Symbols Corrected", "dcp-pft.rs_corrected",
815 FT_INT16, BASE_DEC, NULL, 0,
816 "Number of symbols corrected by RS decode or -1 for failure", HFILL}
819 {"RS decode OK", "dcp-pft.rs_ok",
820 FT_BOOLEAN, BASE_NONE, NULL, 0,
821 "successfully decoded RS blocks", HFILL}
823 {&hf_edcp_pft_payload,
824 {"payload", "dcp-pft.payload",
825 FT_BYTES, BASE_HEX, NULL, 0,
826 "PFT Payload", HFILL}
830 static hf_register_info hf_tpl[] = {
832 {"tag", "dcp-tpl.tlv",
833 FT_BYTES, BASE_HEX, NULL, 0,
837 {"Type", "dcp-tpl.ptr",
838 FT_STRING, BASE_NONE, NULL, 0,
839 "Protocol Type & Revision", HFILL}
843 /* Setup protocol subtree array */
844 static gint *ett[] = {
853 if (proto_dcp_etsi == -1) {
854 proto_dcp_etsi = proto_register_protocol ("ETSI Distribution & Communication Protocol (for DRM)", /* name */
855 "DCP (ETSI)", /* short name */
856 "dcp-etsi" /* abbrev */
858 proto_af = proto_register_protocol ("DCP Application Framing Layer", "DCP-AF", "dcp-af");
859 proto_pft = proto_register_protocol ("DCP Protection, Fragmentation & Transport Layer", "DCP-PFT", "dcp-pft");
860 proto_tpl = proto_register_protocol ("DCP Tag Packet Layer", "DCP-TPL", "dcp-tpl");
864 dcp_module = prefs_register_protocol (proto_dcp_etsi, proto_reg_handoff_dcp_etsi);
865 proto_register_field_array (proto_dcp_etsi, hf_edcp, array_length (hf_edcp));
866 proto_register_field_array (proto_af, hf_af, array_length (hf_af));
867 proto_register_field_array (proto_pft, hf_pft, array_length (hf_pft));
868 proto_register_field_array (proto_tpl, hf_tpl, array_length (hf_tpl));
869 proto_register_subtree_array (ett, array_length (ett));
871 /* subdissector code */
872 dcp_dissector_table = register_dissector_table("dcp-etsi.sync",
873 "DCP Sync", FT_STRING, BASE_NONE);
874 af_dissector_table = register_dissector_table("dcp-af.pt",
875 "AF Payload Type", FT_UINT8, BASE_DEC);
877 tpl_dissector_table = register_dissector_table("dcp-tpl.ptr",
878 "AF Payload Type", FT_STRING, BASE_NONE);
880 register_init_routine(dcp_init_protocol);