181 lines
5.6 KiB
C
181 lines
5.6 KiB
C
/* packet-dpvreq.c
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* Routines for DOCSIS 3.0 DOCSIS Path Verify Response 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_dpvreq(void);
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void proto_reg_handoff_docsis_dpvreq(void);
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/* Initialize the protocol and registered fields */
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static int proto_docsis_dpvreq = -1;
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static int hf_docsis_dpvreq_tranid = -1;
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static int hf_docsis_dpvreq_dschan = -1;
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static int hf_docsis_dpvreq_flags = -1;
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static int hf_docsis_dpvreq_us_sf = -1;
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static int hf_docsis_dpvreq_n = -1;
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static int hf_docsis_dpvreq_start = -1;
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static int hf_docsis_dpvreq_end = -1;
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static int hf_docsis_dpvreq_ts_start = -1;
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static int hf_docsis_dpvreq_ts_end = -1;
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/* Initialize the subtree pointers */
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static gint ett_docsis_dpvreq = -1;
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/* Code to actually dissect the packets */
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static void
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dissect_dpvreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
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{
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proto_item *it;
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proto_tree *dpvreq_tree = NULL;
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guint16 transid;
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guint8 dschan;
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transid = tvb_get_ntohs (tvb, 0);
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dschan = tvb_get_guint8 (tvb, 2);
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col_add_fstr (pinfo->cinfo, COL_INFO,
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"DOCSIS Path Verify Request: Transaction-Id = %u DS-Ch %d",
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transid, dschan);
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if (tree)
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{
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it =
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proto_tree_add_protocol_format (tree, proto_docsis_dpvreq, tvb, 0, -1,
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"DPV Request");
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dpvreq_tree = proto_item_add_subtree (it, ett_docsis_dpvreq);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_tranid, tvb,
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0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_dschan, tvb,
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2, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_flags, tvb,
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3, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_us_sf, tvb,
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4, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_n, tvb,
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8, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_start, tvb,
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10, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_end, tvb,
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11, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_ts_start, tvb,
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12, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item (dpvreq_tree, hf_docsis_dpvreq_ts_end, tvb,
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16, 4, ENC_BIG_ENDIAN);
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}
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}
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/* Register the protocol with Wireshark */
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/* this format is require 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_dpvreq (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_dpvreq_tranid,
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{"Transaction Id", "docsis_dpvreq.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_dpvreq_dschan,
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{"Downstream Channel ID", "docsis_dpvreq.dschan",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_flags,
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{"Flags", "docsis_dpvreq.flags",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_us_sf,
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{"Upstream Service Flow ID", "docsis_dpvreq.us_sf",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_n,
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{"N (Measurement avaraging factor)", "docsis_dpvreq.n",
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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_dpvreq_start,
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{"Start Reference Point", "docsis_dpvreq.start",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_end,
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{"End Reference Point", "docsis_dpvreq.end",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_ts_start,
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{"Timestamp Start", "docsis_dpvreq.ts_start",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_docsis_dpvreq_ts_end,
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{"Timestamp End", "docsis_dpvreq.ts_end",
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FT_UINT32, BASE_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_dpvreq,
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};
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/* Register the protocol name and description */
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proto_docsis_dpvreq =
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proto_register_protocol ("DOCSIS Path Verify Request",
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"DOCSIS DPV-REQ", "docsis_dpvreq");
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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_dpvreq, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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register_dissector ("docsis_dpvreq", dissect_dpvreq, proto_docsis_dpvreq);
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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_dpvreq (void)
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{
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dissector_handle_t docsis_dpvreq_handle;
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docsis_dpvreq_handle = find_dissector ("docsis_dpvreq");
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dissector_add_uint ("docsis_mgmt", 0x27, docsis_dpvreq_handle);
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}
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