2 * Routines for Ranging Request Message dissection
3 * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
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.
31 #include "plugins/plugin_api.h"
32 #include "plugins/plugin_api_defs.h"
33 #include "moduleinfo.h"
41 #include <epan/packet.h>
44 /* Initialize the protocol and registered fields */
45 static int proto_docsis_rngreq = -1;
46 static int hf_docsis_rngreq = -1;
47 static int hf_docsis_rngreq_down_chid = -1;
48 static int hf_docsis_rngreq_sid = -1;
49 static int hf_docsis_rngreq_pend_compl = -1;
52 /* Initialize the subtree pointers */
53 static gint ett_docsis_rngreq = -1;
55 /* Code to actually dissect the packets */
57 dissect_rngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
60 proto_tree *rngreq_tree;
63 sid = tvb_get_ntohs (tvb, 0);
65 if (check_col (pinfo->cinfo, COL_INFO))
67 col_clear (pinfo->cinfo, COL_INFO);
69 col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",
72 col_add_str (pinfo->cinfo, COL_INFO,
73 "Initial Ranging Request SID = 0");
79 proto_tree_add_protocol_format (tree, proto_docsis_rngreq, tvb, 0, -1,
81 rngreq_tree = proto_item_add_subtree (it, ett_docsis_rngreq);
82 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_sid, tvb, 0, 2,
84 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_down_chid, tvb, 2, 1,
86 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_pend_compl, tvb, 3,
96 /* Register the protocol with Ethereal */
98 /* this format is require because a script is used to build the C function
99 that calls all the protocol registration.
104 proto_register_docsis_rngreq (void)
107 /* Setup list of header fields See Section 1.6.1 for details*/
108 static hf_register_info hf[] = {
110 {"RNG-REQ Message", "docsis.rngreq",
111 FT_BYTES, BASE_HEX, NULL, 0x0,
112 "Ranging Request Message", HFILL}
114 {&hf_docsis_rngreq_sid,
115 {"Service Identifier", "docsis.rngreq.sid",
116 FT_UINT16, BASE_DEC, NULL, 0x0,
117 "Service Identifier", HFILL}
119 {&hf_docsis_rngreq_down_chid,
120 {"Downstream Channel ID", "docsis.rngreq.downchid",
121 FT_UINT8, BASE_DEC, NULL, 0x0,
122 "Downstream Channel ID", HFILL}
124 {&hf_docsis_rngreq_pend_compl,
125 {"Pending Till Complete", "docsis.rngreq.pendcomp",
126 FT_UINT8, BASE_DEC, NULL, 0x0,
127 "Upstream Channel ID", HFILL}
132 /* Setup protocol subtree array */
133 static gint *ett[] = {
137 /* Register the protocol name and description */
138 proto_docsis_rngreq = proto_register_protocol ("DOCSIS Range Request Message",
142 /* Required function calls to register the header fields and subtrees used */
143 proto_register_field_array (proto_docsis_rngreq, hf, array_length (hf));
144 proto_register_subtree_array (ett, array_length (ett));
146 register_dissector ("docsis_rngreq", dissect_rngreq, proto_docsis_rngreq);
150 /* If this dissector uses sub-dissector registration add a registration routine.
151 This format is required because a script is used to find these routines and
152 create the code that calls these routines.
155 proto_reg_handoff_docsis_rngreq (void)
157 dissector_handle_t docsis_rngreq_handle;
159 docsis_rngreq_handle = find_dissector ("docsis_rngreq");
160 dissector_add ("docsis_mgmt", 0x04, docsis_rngreq_handle);