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 <epan/packet.h>
33 /* Initialize the protocol and registered fields */
34 static int proto_docsis_rngreq = -1;
35 static int hf_docsis_rngreq_down_chid = -1;
36 static int hf_docsis_rngreq_sid = -1;
37 static int hf_docsis_rngreq_pend_compl = -1;
40 /* Initialize the subtree pointers */
41 static gint ett_docsis_rngreq = -1;
43 /* Code to actually dissect the packets */
45 dissect_rngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
48 proto_tree *rngreq_tree;
51 sid = tvb_get_ntohs (tvb, 0);
53 col_clear (pinfo->cinfo, COL_INFO);
55 col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",
58 col_set_str(pinfo->cinfo, COL_INFO, "Initial Ranging Request SID = 0");
63 proto_tree_add_protocol_format (tree, proto_docsis_rngreq, tvb, 0, -1,
65 rngreq_tree = proto_item_add_subtree (it, ett_docsis_rngreq);
66 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_sid, tvb, 0, 2,
68 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_down_chid, tvb, 2, 1,
70 proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_pend_compl, tvb, 3,
80 /* Register the protocol with Wireshark */
82 /* this format is require because a script is used to build the C function
83 that calls all the protocol registration.
88 proto_register_docsis_rngreq (void)
91 /* Setup list of header fields See Section 1.6.1 for details*/
92 static hf_register_info hf[] = {
93 {&hf_docsis_rngreq_sid,
94 {"Service Identifier", "docsis_rngreq.sid",
95 FT_UINT16, BASE_DEC, NULL, 0x0,
98 {&hf_docsis_rngreq_down_chid,
99 {"Downstream Channel ID", "docsis_rngreq.downchid",
100 FT_UINT8, BASE_DEC, NULL, 0x0,
103 {&hf_docsis_rngreq_pend_compl,
104 {"Pending Till Complete", "docsis_rngreq.pendcomp",
105 FT_UINT8, BASE_DEC, NULL, 0x0,
106 "Upstream Channel ID", HFILL}
111 /* Setup protocol subtree array */
112 static gint *ett[] = {
116 /* Register the protocol name and description */
117 proto_docsis_rngreq = proto_register_protocol ("DOCSIS Range Request Message",
121 /* Required function calls to register the header fields and subtrees used */
122 proto_register_field_array (proto_docsis_rngreq, hf, array_length (hf));
123 proto_register_subtree_array (ett, array_length (ett));
125 register_dissector ("docsis_rngreq", dissect_rngreq, proto_docsis_rngreq);
129 /* If this dissector uses sub-dissector registration add a registration routine.
130 This format is required because a script is used to find these routines and
131 create the code that calls these routines.
134 proto_reg_handoff_docsis_rngreq (void)
136 dissector_handle_t docsis_rngreq_handle;
138 docsis_rngreq_handle = find_dissector ("docsis_rngreq");
139 dissector_add_uint ("docsis_mgmt", 0x04, docsis_rngreq_handle);