2 * Routines for Upstream Channel Change Request dissection
3 * Copyright 2002, Anand V. Narwani <anarwani@cisco.com>
5 * $Id: packet-uccreq.c,v 1.4 2002/09/10 19:07:40 guy Exp $
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.
34 #include "plugins/plugin_api.h"
35 #include "plugins/plugin_api_defs.h"
36 #include "moduleinfo.h"
40 #include <epan/packet.h>
42 /* Initialize the protocol and registered fields */
43 static int proto_docsis_uccreq = -1;
44 static int hf_docsis_uccreq = -1;
45 static int hf_docsis_uccreq_upchid = -1;
46 static dissector_handle_t docsis_tlv_handle;
49 /* Initialize the subtree pointers */
50 static gint ett_docsis_uccreq = -1;
52 /* Code to actually dissect the packets */
54 dissect_uccreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
58 proto_tree *uccreq_tree;
63 chid = tvb_get_guint8 (tvb, 0);
64 tlv_data_len = tvb_length_remaining (tvb, 1);
66 if (check_col (pinfo->cinfo, COL_INFO))
68 col_clear (pinfo->cinfo, COL_INFO);
69 col_add_fstr (pinfo->cinfo, COL_INFO,
70 "Upstream Channel Change request Channel ID = %u (U%u)",
71 chid, (chid > 0 ? chid - 1 : chid));
77 proto_tree_add_protocol_format (tree, proto_docsis_uccreq, tvb, 0,
78 tvb_length_remaining (tvb, 0),
80 uccreq_tree = proto_item_add_subtree (it, ett_docsis_uccreq);
81 proto_tree_add_item (uccreq_tree, hf_docsis_uccreq_upchid, tvb, 0, 1,
84 /* call dissector for Appendix C TLV's */
85 next_tvb = tvb_new_subset (tvb, 1, tlv_data_len, tlv_data_len);
86 call_dissector (docsis_tlv_handle, next_tvb, pinfo, uccreq_tree);
95 /* Register the protocol with Ethereal */
97 /* this format is require because a script is used to build the C function
98 that calls all the protocol registration.
103 proto_register_docsis_uccreq (void)
106 /* Setup list of header fields See Section 1.6.1 for details*/
107 static hf_register_info hf[] = {
109 {"Upstream Channel Change Request", "docsis.uccreq",
110 FT_BYTES, BASE_HEX, NULL, 0x0,
111 "Upstream Channel Change Request", HFILL}
113 {&hf_docsis_uccreq_upchid,
114 {"Upstream Channel Id", "docsis.uccreq.upchid",
115 FT_UINT8, BASE_DEC, NULL, 0x0,
116 "Upstream Channel Id", HFILL}
120 /* Setup protocol subtree array */
121 static gint *ett[] = {
125 /* Register the protocol name and description */
126 proto_docsis_uccreq =
127 proto_register_protocol ("DOCSIS Upstream Channel Change Request",
128 "DOCSIS UCC-REQ", "docsis_uccreq");
130 /* Required function calls to register the header fields and subtrees used */
131 proto_register_field_array (proto_docsis_uccreq, hf, array_length (hf));
132 proto_register_subtree_array (ett, array_length (ett));
134 register_dissector ("docsis_uccreq", dissect_uccreq, proto_docsis_uccreq);
138 /* If this dissector uses sub-dissector registration add a registration routine.
139 This format is required because a script is used to find these routines and
140 create the code that calls these routines.
143 proto_reg_handoff_docsis_uccreq (void)
145 dissector_handle_t docsis_uccreq_handle;
147 docsis_uccreq_handle = find_dissector ("docsis_uccreq");
148 docsis_tlv_handle = find_dissector ("docsis_tlv");
149 dissector_add ("docsis_mgmt", 0x08, docsis_uccreq_handle);