plugins/wimax/msg_dsa.c

   1 /* msg_dsa.c
   2  * WiMax MAC Management DSA-REQ/RSP/ACK Messages 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 /*
  34 #define DEBUG
  35 */
  36
  37 #include <glib.h>
  38 #include <epan/packet.h>
  39 #include "wimax_tlv.h"
  40 #include "wimax_mac.h"
  41 #include "wimax_utils.h"
  42
  43 static gint proto_mac_mgmt_msg_dsa_decoder = -1;
  44 static gint ett_mac_mgmt_msg_dsa_req_decoder = -1;
  45 static gint ett_mac_mgmt_msg_dsa_rsp_decoder = -1;
  46 static gint ett_mac_mgmt_msg_dsa_ack_decoder = -1;
  47
  48 /* fix fields */
  49 static gint hf_dsa_transaction_id = -1;
  50 static gint hf_dsa_confirmation_code = -1;
  51
  52 static void dissect_mac_mgmt_msg_dsa_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  53 {
  54         guint offset = 0;
  55         proto_item *dsa_item;
  56         proto_tree *dsa_tree;
  57
  58         {       /* we are being asked for details */
  59
  60                 /* display MAC message type */
  61                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
  62                                                           "Dynamic Service Addition Request (DSA-REQ)");
  63                 /* add MAC DSx subtree */
  64                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_req_decoder);
  65                 /* Decode and display the Uplink Channel Descriptor (UCD) */
  66                 /* display the Transaction ID */
  67                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
  68                 /* move to next field */
  69                 offset += 2;
  70                 /* process DSA-REQ message TLV Encode Information */
  71                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
  72         }
  73 }
  74
  75 static void dissect_mac_mgmt_msg_dsa_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  76 {
  77         guint offset = 0;
  78         proto_item *dsa_item;
  79         proto_tree *dsa_tree;
  80
  81         {       /* we are being asked for details */
  82                 /* display MAC message type */
  83                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
  84                                                         "Dynamic Service Addition Response (DSA-RSP)");
  85                 /* add MAC DSx subtree */
  86                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_rsp_decoder);
  87                 /* Decode and display the Uplink Channel Descriptor (UCD) */
  88                 /* display the Transaction ID */
  89                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
  90                 /* move to next field */
  91                 offset += 2;
  92                 /* display the Confirmation Code */
  93                 proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
  94                 /* move to next field */
  95                 offset++;
  96                 /* process DSA RSP message TLV Encode Information */
  97                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
  98         }
  99 }
 100
 101 static void dissect_mac_mgmt_msg_dsa_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 102 {
 103         guint offset = 0;
 104         proto_item *dsa_item;
 105         proto_tree *dsa_tree;
 106
 107         {       /* we are being asked for details */
 108                 /* display MAC message type */
 109                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
 110                                                         "Dynamic Service Addition Acknowledge (DSA-ACK)");
 111                 /* add MAC DSx subtree */
 112                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_ack_decoder);
 113                 /* Decode and display the Uplink Channel Descriptor (UCD) */
 114                 /* display the Transaction ID */
 115                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 116                 /* move to next field */
 117                 offset += 2;
 118                 /* display the Confirmation Code */
 119                 proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
 120                 /* move to next field */
 121                 offset++;
 122                 /* process DSA-REQ message TLV Encode Information */
 123                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
 124         }
 125 }
 126
 127 /* Register Wimax Mac Payload Protocol and Dissector */
 128 void proto_register_mac_mgmt_msg_dsa(void)
 129 {
 130         /* DSx display */
 131         static hf_register_info hf[] =
 132         {
 133                 {
 134                         &hf_dsa_confirmation_code,
 135                         {
 136                                 "Confirmation code", "wmx.dsa.confirmation_code",
 137                                 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL
 138                         }
 139                 },
 140                 {
 141                         &hf_dsa_transaction_id,
 142                         {
 143                                 "Transaction ID", "wmx.dsa.transaction_id",
 144                                 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
 145                         }
 146                 }
 147         };
 148
 149         /* Setup protocol subtree array */
 150         static gint *ett[] =
 151                 {
 152                         &ett_mac_mgmt_msg_dsa_req_decoder,
 153                         &ett_mac_mgmt_msg_dsa_rsp_decoder,
 154                         &ett_mac_mgmt_msg_dsa_ack_decoder,
 155                 };
 156
 157         proto_mac_mgmt_msg_dsa_decoder = proto_register_protocol (
 158                 "WiMax DSA Messages", /* name       */
 159                 "WiMax DSA",     /* short name */
 160                 "wmx.dsa"        /* abbrev     */
 161                 );
 162
 163         proto_register_field_array(proto_mac_mgmt_msg_dsa_decoder, hf, array_length(hf));
 164         proto_register_subtree_array(ett, array_length(ett));
 165 }
 166
 167 void
 168 proto_reg_handoff_mac_mgmt_msg_dsa (void)
 169 {
 170         dissector_handle_t dsa_handle;
 171
 172         dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_req_decoder, proto_mac_mgmt_msg_dsa_decoder);
 173         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_REQ, dsa_handle);
 174
 175         dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_rsp_decoder, proto_mac_mgmt_msg_dsa_decoder);
 176         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_RSP, dsa_handle);
 177
 178         dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_ack_decoder, proto_mac_mgmt_msg_dsa_decoder);
 179         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_ACK, dsa_handle);
 180 }