plugins/docsis/packet-regrspmp.c

   1 /* packet-regrspmp.c
   2  * Routines for REG-RSP-MP Message dissection
   3  * Copyright 2007, Bruno Verstuyft  <bruno.verstuyft@excentis.com>
   4  *
   5  * Based on packet-regrsp.c (by Anand V. Narwani <anand[AT]narwani.org>)
   6  *
   7  * $Id$
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <epan/packet.h>
  31
  32
  33 /* Initialize the protocol and registered fields */
  34 static int proto_docsis_regrspmp = -1;
  35
  36 static int hf_docsis_regrspmp_sid = -1;
  37
  38 static int hf_docsis_regrspmp_response = -1;
  39
  40 static int hf_docsis_regrspmp_number_of_fragments = -1;
  41 static int hf_docsis_regrspmp_fragment_sequence_number = -1;
  42
  43 static dissector_handle_t docsis_tlv_handle;
  44
  45
  46
  47 /* Initialize the subtree pointers */
  48 static gint ett_docsis_regrspmp = -1;
  49
  50 static void
  51 dissect_regrspmp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
  52 {
  53         proto_item *it;
  54         proto_tree *regrspmp_tree = NULL;
  55         tvbuff_t *next_tvb;
  56
  57
  58
  59
  60         col_set_str(pinfo->cinfo, COL_INFO, "REG-RSP-MP Message:");
  61
  62                 if (tree)
  63                 {
  64                         it = proto_tree_add_protocol_format (tree, proto_docsis_regrspmp, tvb, 0, -1,"REG-RSP-MP Message");
  65                         regrspmp_tree = proto_item_add_subtree (it, ett_docsis_regrspmp);
  66
  67                         proto_tree_add_item (regrspmp_tree, hf_docsis_regrspmp_sid, tvb, 0, 2, ENC_BIG_ENDIAN);
  68                         proto_tree_add_item (regrspmp_tree, hf_docsis_regrspmp_response, tvb, 2, 1, ENC_BIG_ENDIAN);
  69                         proto_tree_add_item (regrspmp_tree, hf_docsis_regrspmp_number_of_fragments, tvb, 3, 1, ENC_BIG_ENDIAN);
  70                         proto_tree_add_item (regrspmp_tree, hf_docsis_regrspmp_fragment_sequence_number, tvb, 4, 1, ENC_BIG_ENDIAN);
  71
  72                 }
  73                 /* Call Dissector for Appendix C TLV's */
  74                 next_tvb = tvb_new_subset_remaining (tvb, 5);
  75                 call_dissector (docsis_tlv_handle, next_tvb, pinfo, regrspmp_tree);
  76 }
  77
  78
  79
  80
  81 /* Register the protocol with Wireshark */
  82
  83 /* this format is require because a script is used to build the C function
  84    that calls all the protocol registration.
  85 */
  86
  87
  88 void
  89 proto_register_docsis_regrspmp (void)
  90 {
  91
  92         /* Setup list of header fields  See Section 1.6.1 for details*/
  93         static hf_register_info hf[] = {
  94                 {&hf_docsis_regrspmp_sid,
  95                 {"Sid", "docsis_regrspmp.sid",
  96                 FT_UINT16, BASE_DEC, NULL, 0x0,
  97                 "Reg-Rsp-Mp Sid", HFILL}
  98                 },
  99                 {&hf_docsis_regrspmp_response,
 100                 {"Response", "docsis_regrspmp.response",
 101                 FT_UINT8, BASE_DEC, NULL, 0x0,
 102                 "Reg-Rsp-Mp Response", HFILL}
 103                 },
 104                 {&hf_docsis_regrspmp_number_of_fragments,
 105                 {"Number of Fragments", "docsis_regrspmp.number_of_fragments",
 106                 FT_UINT8, BASE_DEC, NULL, 0x0,
 107                 "Reg-Rsp-Mp Number of Fragments", HFILL}
 108                 },
 109                 {&hf_docsis_regrspmp_fragment_sequence_number,
 110                 {"Fragment Sequence Number", "docsis_regrspmp.fragment_sequence_number",
 111                 FT_UINT8, BASE_DEC, NULL, 0x0,
 112                 "Reg-Rsp-Mp Fragment Sequence Number", HFILL}
 113                 },
 114         };
 115
 116         /* Setup protocol subtree array */
 117         static gint *ett[] = {
 118                 &ett_docsis_regrspmp,
 119         };
 120
 121         /* Register the protocol name and description */
 122         proto_docsis_regrspmp =
 123                 proto_register_protocol ("DOCSIS Registration Response Multipart",
 124                                         "DOCSIS Reg-Rsp-Mp", "docsis_regrspmp");
 125
 126         /* Required function calls to register the header fields and subtrees used */
 127         proto_register_field_array (proto_docsis_regrspmp, hf, array_length (hf));
 128         proto_register_subtree_array (ett, array_length (ett));
 129
 130         register_dissector ("docsis_regrspmp", dissect_regrspmp, proto_docsis_regrspmp);
 131 }
 132
 133
 134 /* If this dissector uses sub-dissector registration add a registration routine.
 135 This format is required because a script is used to find these routines and
 136 create the code that calls these routines.
 137 */
 138 void
 139 proto_reg_handoff_docsis_regrspmp (void)
 140 {
 141         dissector_handle_t docsis_regrspmp_handle;
 142
 143         docsis_tlv_handle = find_dissector ("docsis_tlv");
 144         docsis_regrspmp_handle = find_dissector ("docsis_regrspmp");
 145         dissector_add_uint ("docsis_mgmt", 45, docsis_regrspmp_handle);
 146 }