plugins/wimax/msg_clk_cmp.c

   1 /* msg_clk_cmp.c
   2  * WiMax MAC Management CLK_CMP Message decoders
   3  *
   4  * Copyright (c) 2007 by Intel Corporation.
   5  *
   6  * Author: Lu Pan <lu.pan@intel.com>
   7  *
   8  * $Id$
   9  *
  10  * Wireshark - Network traffic analyzer
  11  * By Gerald Combs <gerald@wireshark.org>
  12  * Copyright 1999 Gerald Combs
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  27  */
  28
  29 /* Include files */
  30
  31 #include "config.h"
  32
  33 #include <glib.h>
  34 #include <epan/packet.h>
  35 #include "wimax_mac.h"
  36
  37 static gint proto_mac_mgmt_msg_clk_cmp_decoder = -1;
  38
  39 static gint ett_mac_mgmt_msg_clk_cmp_decoder = -1;
  40
  41 /* CLK_CMP fields */
  42 static gint hf_clk_cmp_clock_count = -1;
  43 static gint hf_clk_cmp_clock_id = -1;
  44 static gint hf_clk_cmp_seq_number = -1;
  45 static gint hf_clk_cmp_comparison_value = -1;
  46 /* static gint hf_clk_cmp_invalid_tlv = -1; */
  47
  48
  49 /* Decode CLK_CMP messages. */
  50 static void dissect_mac_mgmt_msg_clk_cmp_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
  51 {
  52         guint offset = 0;
  53         guint i;
  54         guint clock_count;
  55         proto_item *clk_cmp_item;
  56         proto_tree *clk_cmp_tree;
  57
  58         {       /* we are being asked for details */
  59                 /* display MAC payload type CLK_CMP */
  60                 clk_cmp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_clk_cmp_decoder, tvb, offset, -1, "Clock Comparison (CLK-CMP)");
  61                 /* add MAC CLK_CMP subtree */
  62                 clk_cmp_tree = proto_item_add_subtree(clk_cmp_item, ett_mac_mgmt_msg_clk_cmp_decoder);
  63                 /* get the clock count */
  64                 clock_count = tvb_get_guint8(tvb, offset);
  65                 /* display the clock count */
  66                 proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_clock_count, tvb, offset, 1, ENC_BIG_ENDIAN);
  67                 /* set the offset for clock comparison */
  68                 offset++;
  69                 for (i = 0; i < clock_count; i++ )
  70                 {       /* display the Clock ID */
  71                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_clock_id, tvb, offset++, 1, ENC_BIG_ENDIAN);
  72                         /* display the sequence number */
  73                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_seq_number, tvb, offset++, 1, ENC_BIG_ENDIAN);
  74                         /* display the comparison value */
  75                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_comparison_value, tvb, offset++, 1, ENC_BIG_ENDIAN);
  76                 }
  77         }
  78 }
  79
  80 /* Register Wimax Mac Payload Protocol and Dissector */
  81 void proto_register_mac_mgmt_msg_clk_cmp(void)
  82 {
  83         /* CLK_CMP fields display */
  84         static hf_register_info hf_clk_cmp[] =
  85         {
  86                 {
  87                         &hf_clk_cmp_clock_count,
  88                         {
  89                                 "Clock Count", "wmx.clk_cmp.clock_count",
  90                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
  91                         }
  92                 },
  93                 {
  94                         &hf_clk_cmp_clock_id,
  95                         {
  96                                 "Clock ID", "wmx.clk_cmp.clock_id",
  97                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
  98                         }
  99                 },
 100                 {
 101                         &hf_clk_cmp_comparison_value,
 102                         {
 103                                 "Comparison Value", "wmx.clk_cmp.comparison_value",
 104                                 FT_INT8, BASE_DEC, NULL, 0x0, NULL, HFILL
 105                         }
 106                 },
 107 #if 0
 108                 {
 109                         &hf_clk_cmp_invalid_tlv,
 110                         {
 111                                 "Invalid TLV", "wmx.clk_cmp.invalid_tlv",
 112                                 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
 113                         }
 114                 },
 115 #endif
 116                 {
 117                         &hf_clk_cmp_seq_number,
 118                         {
 119                                 "Sequence Number", "wmx.clk_cmp.seq_number",
 120                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
 121                         }
 122                 }
 123         };
 124
 125         /* Setup protocol subtree array */
 126         static gint *ett[] =
 127                 {
 128                         &ett_mac_mgmt_msg_clk_cmp_decoder,
 129                 };
 130
 131         proto_mac_mgmt_msg_clk_cmp_decoder = proto_register_protocol (
 132                 "WiMax CLK-CMP Message", /* name       */
 133                 "WiMax CLK-CMP (clk)",   /* short name */
 134                 "wmx.clk"                /* abbrev     */
 135                 );
 136
 137         proto_register_field_array(proto_mac_mgmt_msg_clk_cmp_decoder, hf_clk_cmp, array_length(hf_clk_cmp));
 138         proto_register_subtree_array(ett, array_length(ett));
 139 }
 140
 141 void
 142 proto_reg_handoff_mac_mgmt_msg_clk_cmp(void)
 143 {
 144         dissector_handle_t handle;
 145
 146         handle = create_dissector_handle(dissect_mac_mgmt_msg_clk_cmp_decoder, proto_mac_mgmt_msg_clk_cmp_decoder);
 147         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_CLK_CMP, handle);
 148 }