2 * Routines for Dynamic Service Change Acknowledge 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 "moduleinfo.h"
38 #include <epan/packet.h>
40 /* Initialize the protocol and registered fields */
41 static int proto_docsis_dscack = -1;
42 static int hf_docsis_dscack = -1;
43 static int hf_docsis_dscack_tranid = -1;
44 static int hf_docsis_dscack_response = -1;
45 static dissector_handle_t docsis_tlv_handle;
48 /* Initialize the subtree pointers */
49 static gint ett_docsis_dscack = -1;
51 extern value_string docsis_conf_code[];
53 /* Code to actually dissect the packets */
55 dissect_dscack (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
59 proto_tree *dscack_tree;
64 transid = tvb_get_ntohs (tvb, 0);
65 response = tvb_get_guint8 (tvb, 2);
67 if (check_col (pinfo->cinfo, COL_INFO))
69 col_clear (pinfo->cinfo, COL_INFO);
70 col_add_fstr (pinfo->cinfo, COL_INFO,
71 "Dynamic Service Change Ack ID = %u (%s)", transid,
72 val_to_str (response, docsis_conf_code, "%s"));
78 proto_tree_add_protocol_format (tree, proto_docsis_dscack, tvb, 0, -1,
80 dscack_tree = proto_item_add_subtree (it, ett_docsis_dscack);
81 proto_tree_add_item (dscack_tree, hf_docsis_dscack_tranid, tvb, 0, 2,
83 proto_tree_add_item (dscack_tree, hf_docsis_dscack_response, tvb, 2, 1,
85 /* Call Dissector for Appendix C TLV's */
86 next_tvb = tvb_new_subset_remaining (tvb, 3);
87 call_dissector (docsis_tlv_handle, next_tvb, pinfo, dscack_tree);
97 /* Register the protocol with Wireshark */
99 /* this format is require because a script is used to build the C function
100 that calls all the protocol registration.
105 proto_register_docsis_dscack (void)
108 /* Setup list of header fields See Section 1.6.1 for details*/
109 static hf_register_info hf[] = {
111 {"Dynamic Service Change Ack", "docsis_dscack",
112 FT_BYTES, BASE_NONE, NULL, 0x0,
113 "Dynamic Service Add Request", HFILL}
115 {&hf_docsis_dscack_tranid,
116 {"Transaction Id", "docsis_dscack.tranid",
117 FT_UINT16, BASE_DEC, NULL, 0x0,
118 "Service Identifier", HFILL}
120 {&hf_docsis_dscack_response,
121 {"Confirmation Code", "docsis_dscack.confcode",
122 FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0,
127 /* Setup protocol subtree array */
128 static gint *ett[] = {
132 /* Register the protocol name and description */
133 proto_docsis_dscack =
134 proto_register_protocol ("DOCSIS Dynamic Service Change Acknowledgement",
135 "DOCSIS DSC-ACK", "docsis_dscack");
137 /* Required function calls to register the header fields and subtrees used */
138 proto_register_field_array (proto_docsis_dscack, hf, array_length (hf));
139 proto_register_subtree_array (ett, array_length (ett));
141 register_dissector ("docsis_dscack", dissect_dscack, proto_docsis_dscack);
145 /* If this dissector uses sub-dissector registration add a registration routine.
146 This format is required because a script is used to find these routines and
147 create the code that calls these routines.
150 proto_reg_handoff_docsis_dscack (void)
152 dissector_handle_t docsis_dscack_handle;
154 docsis_dscack_handle = find_dissector ("docsis_dscack");
155 docsis_tlv_handle = find_dissector ("docsis_tlv");
156 dissector_add ("docsis_mgmt", 0x14, docsis_dscack_handle);