2 * Routines for Intial Ranging Request Message dissection
3 * Copyright 2003, Brian Wheeler <brian.wheeler[AT]arrisi.com>
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
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_intrngreq = -1;
43 static int hf_docsis_intrngreq = -1;
44 static int hf_docsis_intrngreq_down_chid = -1;
45 static int hf_docsis_intrngreq_sid = -1;
46 static int hf_docsis_intrngreq_up_chid = -1;
49 /* Initialize the subtree pointers */
50 static gint ett_docsis_intrngreq = -1;
52 /* Code to actually dissect the packets */
54 dissect_intrngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
56 proto_item *intrngreq_item;
57 proto_tree *intrngreq_tree;
60 sid = tvb_get_ntohs (tvb, 0);
62 if (check_col (pinfo->cinfo, COL_INFO))
64 col_clear (pinfo->cinfo, COL_INFO);
65 col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",sid);
71 proto_tree_add_protocol_format (tree, proto_docsis_intrngreq, tvb, 0,
72 tvb_length_remaining (tvb, 0),
73 "Initial Ranging Request");
74 intrngreq_tree = proto_item_add_subtree (intrngreq_item, ett_docsis_intrngreq);
75 proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_sid, tvb, 0, 2,
77 proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_down_chid, tvb, 2, 1,
79 proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_up_chid, tvb, 3,
89 /* Register the protocol with Ethereal */
91 /* this format is require because a script is used to build the C function
92 that calls all the protocol registration.
97 proto_register_docsis_intrngreq (void)
100 /* Setup list of header fields See Section 1.6.1 for details*/
101 static hf_register_info hf[] = {
102 {&hf_docsis_intrngreq,
103 {"RNG-REQ Message", "docsis.intrngreq",
104 FT_BYTES, BASE_HEX, NULL, 0x0,
105 "Ranging Request Message", HFILL}
107 {&hf_docsis_intrngreq_sid,
108 {"Service Identifier", "docsis.intrngreq.sid",
109 FT_UINT16, BASE_DEC, NULL, 0x0,
110 "Service Identifier", HFILL}
112 {&hf_docsis_intrngreq_down_chid,
113 {"Downstream Channel ID", "docsis.intrngreq.downchid",
114 FT_UINT8, BASE_DEC, NULL, 0x0,
115 "Downstream Channel ID", HFILL}
117 {&hf_docsis_intrngreq_up_chid,
118 {"Upstream Channel ID", "docsis.intrngreq.upchid",
119 FT_UINT8, BASE_DEC, NULL, 0x0,
120 "Upstream Channel ID", HFILL}
125 /* Setup protocol subtree array */
126 static gint *ett[] = {
127 &ett_docsis_intrngreq,
130 /* Register the protocol name and description */
131 proto_docsis_intrngreq = proto_register_protocol ("DOCSIS Initial Ranging Message",
132 "DOCSIS INT-RNG-REQ",
135 /* Required function calls to register the header fields and subtrees used */
136 proto_register_field_array (proto_docsis_intrngreq, hf, array_length (hf));
137 proto_register_subtree_array (ett, array_length (ett));
139 register_dissector ("docsis_intrngreq", dissect_intrngreq, proto_docsis_intrngreq);
143 /* If this dissector uses sub-dissector registration add a registration routine.
144 This format is required because a script is used to find these routines and
145 create the code that calls these routines.
148 proto_reg_handoff_docsis_intrngreq (void)
150 dissector_handle_t docsis_intrngreq_handle;
152 docsis_intrngreq_handle = find_dissector ("docsis_intrngreq");
153 dissector_add ("docsis_mgmt", 0x1E, docsis_intrngreq_handle);