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 <epan/packet.h>
32 /* Initialize the protocol and registered fields */
33 static int proto_docsis_dscack = -1;
34 static int hf_docsis_dscack_tranid = -1;
35 static int hf_docsis_dscack_response = -1;
36 static dissector_handle_t docsis_tlv_handle;
39 /* Initialize the subtree pointers */
40 static gint ett_docsis_dscack = -1;
42 extern value_string docsis_conf_code[];
44 /* Code to actually dissect the packets */
46 dissect_dscack (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
50 proto_tree *dscack_tree = NULL;
55 transid = tvb_get_ntohs (tvb, 0);
56 response = tvb_get_guint8 (tvb, 2);
58 col_add_fstr (pinfo->cinfo, COL_INFO,
59 "Dynamic Service Change Ack ID = %u (%s)", transid,
60 val_to_str (response, docsis_conf_code, "%d"));
65 proto_tree_add_protocol_format (tree, proto_docsis_dscack, tvb, 0, -1,
67 dscack_tree = proto_item_add_subtree (it, ett_docsis_dscack);
68 proto_tree_add_item (dscack_tree, hf_docsis_dscack_tranid, tvb, 0, 2,
70 proto_tree_add_item (dscack_tree, hf_docsis_dscack_response, tvb, 2, 1,
73 /* Call Dissector for Appendix C TLV's */
74 next_tvb = tvb_new_subset_remaining (tvb, 3);
75 call_dissector (docsis_tlv_handle, next_tvb, pinfo, dscack_tree);
84 /* Register the protocol with Wireshark */
86 /* this format is require because a script is used to build the C function
87 that calls all the protocol registration.
92 proto_register_docsis_dscack (void)
95 /* Setup list of header fields See Section 1.6.1 for details*/
96 static hf_register_info hf[] = {
97 {&hf_docsis_dscack_tranid,
98 {"Transaction Id", "docsis_dscack.tranid",
99 FT_UINT16, BASE_DEC, NULL, 0x0,
100 "Service Identifier", HFILL}
102 {&hf_docsis_dscack_response,
103 {"Confirmation Code", "docsis_dscack.confcode",
104 FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0,
109 /* Setup protocol subtree array */
110 static gint *ett[] = {
114 /* Register the protocol name and description */
115 proto_docsis_dscack =
116 proto_register_protocol ("DOCSIS Dynamic Service Change Acknowledgement",
117 "DOCSIS DSC-ACK", "docsis_dscack");
119 /* Required function calls to register the header fields and subtrees used */
120 proto_register_field_array (proto_docsis_dscack, hf, array_length (hf));
121 proto_register_subtree_array (ett, array_length (ett));
123 register_dissector ("docsis_dscack", dissect_dscack, proto_docsis_dscack);
127 /* If this dissector uses sub-dissector registration add a registration routine.
128 This format is required because a script is used to find these routines and
129 create the code that calls these routines.
132 proto_reg_handoff_docsis_dscack (void)
134 dissector_handle_t docsis_dscack_handle;
136 docsis_dscack_handle = find_dissector ("docsis_dscack");
137 docsis_tlv_handle = find_dissector ("docsis_tlv");
138 dissector_add_uint ("docsis_mgmt", 0x14, docsis_dscack_handle);