plugins/wimax/wimax_ffb_decoder.c

   1 /* wimax_ffb_decoder.c
   2  * WiMax Fast Feedback packet decoder
   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
  36 extern gint proto_wimax;
  37
  38 static gint proto_wimax_ffb_decoder = -1;
  39 static gint ett_wimax_ffb_decoder = -1;
  40
  41 /* static gint hf_ffb_burst = -1; */
  42 static gint hf_ffb_num_of_ffbs = -1;
  43 static gint hf_ffb_type = -1;
  44 static gint hf_ffb_subchannel = -1;
  45 static gint hf_ffb_symboloffset = -1;
  46 static gint hf_ffb_value = -1;
  47
  48
  49 static void dissect_wimax_ffb_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  50 {
  51         gint offset = 0;
  52         guint length, num_of_ffbs, i;
  53         proto_item *ffb_item = NULL;
  54         proto_tree *ffb_tree = NULL;
  55
  56         /* update the info column */
  57         col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Fast Feedback Burst:");
  58         if (tree)
  59         {       /* we are being asked for details */
  60                 /* get the tvb reported length */
  61                 length = tvb_reported_length(tvb);
  62                 /* display Fast Feedback Burst dissector info */
  63                 ffb_item = proto_tree_add_protocol_format(tree, proto_wimax_ffb_decoder, tvb, offset, length, "Fast Feedback Burst (%u bytes)", length);
  64                 /* add Fast Feedback Burst subtree */
  65                 ffb_tree = proto_item_add_subtree(ffb_item, ett_wimax_ffb_decoder);
  66                 /* get the number of FFBs */
  67                 num_of_ffbs =  tvb_get_guint8(tvb, offset);
  68                 /* display the number of FFBs */
  69                 proto_tree_add_item(ffb_tree, hf_ffb_num_of_ffbs, tvb, offset++, 1, ENC_BIG_ENDIAN);
  70                 /* display the FFB type */
  71                 proto_tree_add_item(ffb_tree, hf_ffb_type, tvb, offset++, 1, ENC_BIG_ENDIAN);
  72                 /* display the FFBs */
  73                 for(i = 0; i < num_of_ffbs; i++)
  74                 {
  75                         proto_tree_add_item(ffb_tree, hf_ffb_subchannel, tvb, offset++, 1, ENC_BIG_ENDIAN);
  76                         proto_tree_add_item(ffb_tree, hf_ffb_symboloffset, tvb, offset++, 1, ENC_BIG_ENDIAN);
  77                         proto_tree_add_item(ffb_tree, hf_ffb_value, tvb, offset++, 1, ENC_BIG_ENDIAN);
  78                 }
  79         }
  80 }
  81
  82 /* Register Wimax FFB Protocol */
  83 void proto_register_wimax_ffb(void)
  84 {
  85         /* FFB display */
  86         static hf_register_info hf[] =
  87         {
  88 #if 0
  89                 {
  90                         &hf_ffb_burst,
  91                         {"Fast Feedback Burst", "wmx.ffb.burst", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}
  92                 },
  93 #endif
  94                 {
  95                         &hf_ffb_num_of_ffbs,
  96                         {"Number Of Fast Feedback", "wmx.ffb.num_of_ffbs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
  97                 },
  98                 {
  99                         &hf_ffb_type,
 100                         {"Fast Feedback Type", "wmx.ffb.ffb_type", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
 101                 },
 102                 {
 103                         &hf_ffb_subchannel,
 104                         {"Physical Subchannel", "wmx.ffb.subchannel", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
 105                 },
 106                 {
 107                         &hf_ffb_symboloffset,
 108                         {"Symbol Offset", "wmx.ffb.symbol_offset", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
 109                 },
 110                 {
 111                         &hf_ffb_value,
 112                         {"Fast Feedback Value", "wmx.ffb.ffb_value", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
 113                 }
 114         };
 115
 116         /* Setup protocol subtree array */
 117         static gint *ett[] =
 118                 {
 119                         &ett_wimax_ffb_decoder,
 120                 };
 121
 122         proto_wimax_ffb_decoder = proto_wimax;
 123
 124         /* register the field display messages */
 125         proto_register_field_array(proto_wimax_ffb_decoder, hf, array_length(hf));
 126         proto_register_subtree_array(ett, array_length(ett));
 127
 128         register_dissector("wimax_ffb_burst_handler", dissect_wimax_ffb_decoder, -1);
 129 }