132 lines
4.4 KiB
C
132 lines
4.4 KiB
C
/* packet-dbcreq.c
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* Routines for DOCSIS 3.0 Dynamic Bonding Change Request Message dissection.
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* Copyright 2010, Guido Reismueller <g.reismueller[AT]avm.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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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void proto_register_docsis_dbcreq(void);
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void proto_reg_handoff_docsis_dbcreq(void);
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/* Initialize the protocol and registered fields */
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static int proto_docsis_dbcreq = -1;
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static int hf_docsis_dbcreq_tranid = -1;
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static int hf_docsis_dbcreq_number_of_fragments = -1;
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static int hf_docsis_dbcreq_fragment_sequence_number = -1;
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static dissector_handle_t docsis_tlv_handle;
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/* Initialize the subtree pointers */
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static gint ett_docsis_dbcreq = -1;
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/* Code to actually dissect the packets */
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static void
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dissect_dbcreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
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{
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proto_item *dbcreq_item;
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proto_tree *dbcreq_tree = NULL;
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guint16 transid;
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tvbuff_t *next_tvb;
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transid = tvb_get_ntohs (tvb, 0);
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col_add_fstr (pinfo->cinfo, COL_INFO,
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"Dynamic Bonding Change Request: Tran-Id = %u", transid);
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if (tree)
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{
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dbcreq_item = proto_tree_add_protocol_format (tree, proto_docsis_dbcreq,
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tvb, 0, -1,
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"Dynamic Bonding Change Request");
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dbcreq_tree = proto_item_add_subtree (dbcreq_item, ett_docsis_dbcreq);
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proto_tree_add_item (dbcreq_tree, hf_docsis_dbcreq_tranid,
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tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item( dbcreq_tree, hf_docsis_dbcreq_number_of_fragments,
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tvb, 2, 1, ENC_BIG_ENDIAN );
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proto_tree_add_item( dbcreq_tree, hf_docsis_dbcreq_fragment_sequence_number ,
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tvb, 3, 1, ENC_BIG_ENDIAN );
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}
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/* Call Dissector for Appendix C TLV's */
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next_tvb = tvb_new_subset_remaining (tvb, 4);
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call_dissector (docsis_tlv_handle, next_tvb, pinfo, dbcreq_tree);
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}
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/* Register the protocol with Wireshark */
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/*
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* this format is required because a script is used to build the C function
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* that calls all the protocol registration.
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*/
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void
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proto_register_docsis_dbcreq (void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{&hf_docsis_dbcreq_tranid,
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{"Transaction Id", "docsis_dbcreq.tranid",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dbcreq_number_of_fragments,
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{"Number of Fragments", "docsis_dbcreq.number_of_fragments",
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FT_UINT8, BASE_HEX_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dbcreq_fragment_sequence_number,
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{"Fragment Seq No", "docsis_dbcreq.fragment_sequence_number",
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FT_UINT8, BASE_HEX_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_docsis_dbcreq,
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};
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/* Register the protocol name and description */
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proto_docsis_dbcreq = proto_register_protocol ("DOCSIS Dynamic Bonding Change Request",
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"DOCSIS DBC-REQ",
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"docsis_dbcreq");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array (proto_docsis_dbcreq, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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register_dissector ("docsis_dbcreq", dissect_dbcreq, proto_docsis_dbcreq);
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}
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/* If this dissector uses sub-dissector registration add a registration routine.
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This format is required because a script is used to find these routines and
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create the code that calls these routines.
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*/
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void
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proto_reg_handoff_docsis_dbcreq (void)
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{
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dissector_handle_t docsis_dbcreq_handle;
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docsis_dbcreq_handle = find_dissector ("docsis_dbcreq");
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docsis_tlv_handle = find_dissector ("docsis_tlv");
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dissector_add_uint ("docsis_mgmt", 0x24, docsis_dbcreq_handle);
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}
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