2 * Routines for Dynamic Service Change Response 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_dscrsp = -1;
34 static int hf_docsis_dscrsp = -1;
35 static int hf_docsis_dscrsp_tranid = -1;
36 static int hf_docsis_dscrsp_response = -1;
37 static dissector_handle_t docsis_tlv_handle;
40 /* Initialize the subtree pointers */
41 static gint ett_docsis_dscrsp = -1;
43 extern value_string docsis_conf_code[];
45 /* Code to actually dissect the packets */
47 dissect_dscrsp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
51 proto_tree *dscrsp_tree = NULL;
57 transid = tvb_get_ntohs (tvb, 0);
58 response = tvb_get_guint8 (tvb, 2);
60 if (check_col (pinfo->cinfo, COL_INFO))
62 col_clear (pinfo->cinfo, COL_INFO);
63 col_add_fstr (pinfo->cinfo, COL_INFO,
64 "Dynamic Service Change Response ID = %u (%s)", transid,
65 val_to_str (response, docsis_conf_code, "%s"));
71 proto_tree_add_protocol_format (tree, proto_docsis_dscrsp, tvb, 0, -1,
73 dscrsp_tree = proto_item_add_subtree (it, ett_docsis_dscrsp);
74 proto_tree_add_item (dscrsp_tree, hf_docsis_dscrsp_tranid, tvb, 0, 2,
76 proto_tree_add_item (dscrsp_tree, hf_docsis_dscrsp_response, tvb, 2, 1,
80 /* Call Dissector for Appendix C TLV's */
81 next_tvb = tvb_new_subset_remaining (tvb, 3);
82 call_dissector (docsis_tlv_handle, next_tvb, pinfo, dscrsp_tree);
88 /* Register the protocol with Wireshark */
90 /* this format is require because a script is used to build the C function
91 that calls all the protocol registration.
96 proto_register_docsis_dscrsp (void)
99 /* Setup list of header fields See Section 1.6.1 for details*/
100 static hf_register_info hf[] = {
102 {"Dynamic Service Change Request", "docsis_dscrsp",
103 FT_BYTES, BASE_NONE, NULL, 0x0,
104 "Dynamic Service Add Request", HFILL}
106 {&hf_docsis_dscrsp_tranid,
107 {"Transaction Id", "docsis_dscrsp.tranid",
108 FT_UINT16, BASE_DEC, NULL, 0x0,
109 "Service Identifier", HFILL}
111 {&hf_docsis_dscrsp_response,
112 {"Confirmation Code", "docsis_dscrsp.confcode",
113 FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0,
118 /* Setup protocol subtree array */
119 static gint *ett[] = {
123 /* Register the protocol name and description */
124 proto_docsis_dscrsp =
125 proto_register_protocol ("DOCSIS Dynamic Service Change Response",
126 "DOCSIS DSC-RSP", "docsis_dscrsp");
128 /* Required function calls to register the header fields and subtrees used */
129 proto_register_field_array (proto_docsis_dscrsp, hf, array_length (hf));
130 proto_register_subtree_array (ett, array_length (ett));
132 register_dissector ("docsis_dscrsp", dissect_dscrsp, proto_docsis_dscrsp);
136 /* If this dissector uses sub-dissector registration add a registration routine.
137 This format is required because a script is used to find these routines and
138 create the code that calls these routines.
141 proto_reg_handoff_docsis_dscrsp (void)
143 dissector_handle_t docsis_dscrsp_handle;
145 docsis_dscrsp_handle = find_dissector ("docsis_dscrsp");
146 docsis_tlv_handle = find_dissector ("docsis_tlv");
147 dissector_add ("docsis_mgmt", 0x13, docsis_dscrsp_handle);