plugins/docsis/packet-dsdrsp.c

   1 /* packet-dsdrsp.c
   2  * Routines for Dynamic Service Delete Response dissection
   3  * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  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.
  15  *
  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.
  20  *
  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <epan/packet.h>
  29
  30 /* Initialize the protocol and registered fields */
  31 static int proto_docsis_dsdrsp = -1;
  32 static int hf_docsis_dsdrsp_tranid = -1;
  33 static int hf_docsis_dsdrsp_confcode = -1;
  34 static int hf_docsis_dsdrsp_rsvd = -1;
  35
  36 extern value_string docsis_conf_code[];
  37
  38 /* Initialize the subtree pointers */
  39 static gint ett_docsis_dsdrsp = -1;
  40
  41 /* Code to actually dissect the packets */
  42 static void
  43 dissect_dsdrsp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
  44 {
  45
  46   proto_item *it;
  47   proto_tree *dsdrsp_tree;
  48   guint16 tranid;
  49   guint8 confcode;
  50
  51   tranid = tvb_get_ntohs (tvb, 0);
  52   confcode = tvb_get_guint8 (tvb, 2);
  53
  54   col_add_fstr (pinfo->cinfo, COL_INFO,
  55             "Dynamic Service Delete Response Tran id = %u (%s)",
  56             tranid, val_to_str (confcode, docsis_conf_code, "%d"));
  57
  58   if (tree)
  59     {
  60       it =
  61         proto_tree_add_protocol_format (tree, proto_docsis_dsdrsp, tvb, 0, -1,
  62                                         "DSD Response");
  63       dsdrsp_tree = proto_item_add_subtree (it, ett_docsis_dsdrsp);
  64       proto_tree_add_item (dsdrsp_tree, hf_docsis_dsdrsp_tranid, tvb, 0, 2,
  65                            ENC_BIG_ENDIAN);
  66       proto_tree_add_item (dsdrsp_tree, hf_docsis_dsdrsp_confcode, tvb, 2, 1,
  67                            ENC_BIG_ENDIAN);
  68       proto_tree_add_item (dsdrsp_tree, hf_docsis_dsdrsp_rsvd, tvb, 3, 1,
  69                            ENC_BIG_ENDIAN);
  70     }
  71
  72 }
  73
  74
  75
  76
  77 /* Register the protocol with Wireshark */
  78
  79 /* this format is require because a script is used to build the C function
  80    that calls all the protocol registration.
  81 */
  82
  83
  84 void
  85 proto_register_docsis_dsdrsp (void)
  86 {
  87
  88 /* Setup list of header fields  See Section 1.6.1 for details*/
  89   static hf_register_info hf[] = {
  90     {&hf_docsis_dsdrsp_tranid,
  91      {"Transaction Id", "docsis_dsdrsp.tranid",
  92       FT_UINT16, BASE_DEC, NULL, 0x0,
  93       NULL, HFILL}
  94      },
  95     {&hf_docsis_dsdrsp_confcode,
  96      {"Confirmation Code", "docsis_dsdrsp.confcode",
  97       FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0,
  98       NULL, HFILL}
  99      },
 100     {&hf_docsis_dsdrsp_rsvd,
 101      {"Reserved", "docsis_dsdrsp.rsvd",
 102       FT_UINT8, BASE_DEC, NULL, 0x0,
 103       NULL, HFILL}
 104      },
 105   };
 106
 107 /* Setup protocol subtree array */
 108   static gint *ett[] = {
 109     &ett_docsis_dsdrsp,
 110   };
 111
 112 /* Register the protocol name and description */
 113   proto_docsis_dsdrsp =
 114     proto_register_protocol ("DOCSIS Dynamic Service Delete Response",
 115                              "DOCSIS DSD-RSP", "docsis_dsdrsp");
 116
 117 /* Required function calls to register the header fields and subtrees used */
 118   proto_register_field_array (proto_docsis_dsdrsp, hf, array_length (hf));
 119   proto_register_subtree_array (ett, array_length (ett));
 120
 121   register_dissector ("docsis_dsdrsp", dissect_dsdrsp, proto_docsis_dsdrsp);
 122 }
 123
 124
 125 /* If this dissector uses sub-dissector registration add a registration routine.
 126    This format is required because a script is used to find these routines and
 127    create the code that calls these routines.
 128 */
 129 void
 130 proto_reg_handoff_docsis_dsdrsp (void)
 131 {
 132   dissector_handle_t docsis_dsdrsp_handle;
 133
 134   docsis_dsdrsp_handle = find_dissector ("docsis_dsdrsp");
 135   dissector_add_uint ("docsis_mgmt", 0x16, docsis_dsdrsp_handle);
 136
 137 }