2 * Routines for Upstream Channel Change Request 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.
34 #include "moduleinfo.h"
38 #include <epan/packet.h>
40 /* Initialize the protocol and registered fields */
41 static int proto_docsis_uccreq = -1;
42 static int hf_docsis_uccreq = -1;
43 static int hf_docsis_uccreq_upchid = -1;
44 static dissector_handle_t docsis_tlv_handle;
47 /* Initialize the subtree pointers */
48 static gint ett_docsis_uccreq = -1;
50 /* Code to actually dissect the packets */
52 dissect_uccreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
56 proto_tree *uccreq_tree;
60 chid = tvb_get_guint8 (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,
66 "Upstream Channel Change request Channel ID = %u (U%u)",
67 chid, (chid > 0 ? chid - 1 : chid));
73 proto_tree_add_protocol_format (tree, proto_docsis_uccreq, tvb, 0, -1,
75 uccreq_tree = proto_item_add_subtree (it, ett_docsis_uccreq);
76 proto_tree_add_item (uccreq_tree, hf_docsis_uccreq_upchid, tvb, 0, 1,
79 /* call dissector for Appendix C TLV's */
80 next_tvb = tvb_new_subset_remaining (tvb, 1);
81 call_dissector (docsis_tlv_handle, next_tvb, pinfo, uccreq_tree);
90 /* Register the protocol with Wireshark */
92 /* this format is require because a script is used to build the C function
93 that calls all the protocol registration.
98 proto_register_docsis_uccreq (void)
101 /* Setup list of header fields See Section 1.6.1 for details*/
102 static hf_register_info hf[] = {
104 {"Upstream Channel Change Request", "docsis_uccreq",
105 FT_BYTES, BASE_NONE, NULL, 0x0,
108 {&hf_docsis_uccreq_upchid,
109 {"Upstream Channel Id", "docsis_uccreq.upchid",
110 FT_UINT8, BASE_DEC, NULL, 0x0,
115 /* Setup protocol subtree array */
116 static gint *ett[] = {
120 /* Register the protocol name and description */
121 proto_docsis_uccreq =
122 proto_register_protocol ("DOCSIS Upstream Channel Change Request",
123 "DOCSIS UCC-REQ", "docsis_uccreq");
125 /* Required function calls to register the header fields and subtrees used */
126 proto_register_field_array (proto_docsis_uccreq, hf, array_length (hf));
127 proto_register_subtree_array (ett, array_length (ett));
129 register_dissector ("docsis_uccreq", dissect_uccreq, proto_docsis_uccreq);
133 /* If this dissector uses sub-dissector registration add a registration routine.
134 This format is required because a script is used to find these routines and
135 create the code that calls these routines.
138 proto_reg_handoff_docsis_uccreq (void)
140 dissector_handle_t docsis_uccreq_handle;
142 docsis_uccreq_handle = find_dissector ("docsis_uccreq");
143 docsis_tlv_handle = find_dissector ("docsis_tlv");
144 dissector_add ("docsis_mgmt", 0x08, docsis_uccreq_handle);