2 * Routines for Ranging Request Message dissection
3 * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
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.
30 #include "moduleinfo.h"
38 #include <epan/packet.h>
41 /* Initialize the protocol and registered fields */
42 static int proto_docsis_rngreq = -1;
43 static int hf_docsis_rngreq = -1;
44 static int hf_docsis_rngreq_down_chid = -1;
45 static int hf_docsis_rngreq_sid = -1;
46 static int hf_docsis_rngreq_pend_compl = -1;
49 /* Initialize the subtree pointers */
50 static gint ett_docsis_rngreq = -1;
52 /* Code to actually dissect the packets */
54 dissect_rngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
57 proto_tree *rngreq_tree;
60 sid = tvb_get_ntohs (tvb, 0);
62 if (check_col (pinfo->cinfo, COL_INFO))
64 col_clear (pinfo->cinfo, COL_INFO);
66 col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",
69 col_add_str (pinfo->cinfo, COL_INFO,
70 "Initial Ranging Request SID = 0");
76 proto_tree_add_protocol_format (tree, proto_docsis_rngreq, tvb, 0, -1,
78 rngreq_tree = proto_item_add_subtree (it, ett_docsis_rngreq);
79 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_sid, tvb, 0, 2,
81 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_down_chid, tvb, 2, 1,
83 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_pend_compl, tvb, 3,
93 /* Register the protocol with Wireshark */
95 /* this format is require because a script is used to build the C function
96 that calls all the protocol registration.
101 proto_register_docsis_rngreq (void)
104 /* Setup list of header fields See Section 1.6.1 for details*/
105 static hf_register_info hf[] = {
107 {"RNG-REQ Message", "docsis_rngreq",
108 FT_BYTES, BASE_NONE, NULL, 0x0,
109 "Ranging Request Message", HFILL}
111 {&hf_docsis_rngreq_sid,
112 {"Service Identifier", "docsis_rngreq.sid",
113 FT_UINT16, BASE_DEC, NULL, 0x0,
116 {&hf_docsis_rngreq_down_chid,
117 {"Downstream Channel ID", "docsis_rngreq.downchid",
118 FT_UINT8, BASE_DEC, NULL, 0x0,
121 {&hf_docsis_rngreq_pend_compl,
122 {"Pending Till Complete", "docsis_rngreq.pendcomp",
123 FT_UINT8, BASE_DEC, NULL, 0x0,
124 "Upstream Channel ID", HFILL}
129 /* Setup protocol subtree array */
130 static gint *ett[] = {
134 /* Register the protocol name and description */
135 proto_docsis_rngreq = proto_register_protocol ("DOCSIS Range Request Message",
139 /* Required function calls to register the header fields and subtrees used */
140 proto_register_field_array (proto_docsis_rngreq, hf, array_length (hf));
141 proto_register_subtree_array (ett, array_length (ett));
143 register_dissector ("docsis_rngreq", dissect_rngreq, proto_docsis_rngreq);
147 /* If this dissector uses sub-dissector registration add a registration routine.
148 This format is required because a script is used to find these routines and
149 create the code that calls these routines.
152 proto_reg_handoff_docsis_rngreq (void)
154 dissector_handle_t docsis_rngreq_handle;
156 docsis_rngreq_handle = find_dissector ("docsis_rngreq");
157 dissector_add ("docsis_mgmt", 0x04, docsis_rngreq_handle);