139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/* packet-rngreq.c
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* Routines for Ranging Request Message dissection
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* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
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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_rngreq(void);
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void proto_reg_handoff_docsis_rngreq(void);
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/* Initialize the protocol and registered fields */
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static int proto_docsis_rngreq = -1;
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static int hf_docsis_rngreq_down_chid = -1;
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static int hf_docsis_rngreq_sid = -1;
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static int hf_docsis_rngreq_pend_compl = -1;
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/* Initialize the subtree pointers */
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static gint ett_docsis_rngreq = -1;
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/* Code to actually dissect the packets */
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static void
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dissect_rngreq (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 *rngreq_tree;
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guint16 sid;
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sid = tvb_get_ntohs (tvb, 0);
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if (sid > 0)
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col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",
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sid);
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else
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col_set_str(pinfo->cinfo, COL_INFO, "Initial Ranging Request SID = 0");
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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_rngreq, tvb, 0, -1,
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"Ranging Request");
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rngreq_tree = proto_item_add_subtree (it, ett_docsis_rngreq);
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proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_sid, tvb, 0, 2,
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ENC_BIG_ENDIAN);
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proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_down_chid, tvb, 2, 1,
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ENC_BIG_ENDIAN);
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proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_pend_compl, tvb, 3,
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1, 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_rngreq (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_rngreq_sid,
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{"Service Identifier", "docsis_rngreq.sid",
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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_rngreq_down_chid,
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{"Downstream Channel ID", "docsis_rngreq.downchid",
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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_rngreq_pend_compl,
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{"Pending Till Complete", "docsis_rngreq.pendcomp",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"Upstream Channel ID", 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_rngreq,
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};
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/* Register the protocol name and description */
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proto_docsis_rngreq = proto_register_protocol ("DOCSIS Range Request Message",
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"DOCSIS RNG-REQ",
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"docsis_rngreq");
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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_rngreq, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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register_dissector ("docsis_rngreq", dissect_rngreq, proto_docsis_rngreq);
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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_rngreq (void)
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{
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dissector_handle_t docsis_rngreq_handle;
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docsis_rngreq_handle = find_dissector ("docsis_rngreq");
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dissector_add_uint ("docsis_mgmt", 0x04, docsis_rngreq_handle);
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}
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