plugins/epan/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  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1999 Gerald Combs
  11  *
  12  * SPDX-License-Identifier: GPL-2.0-or-later
  13  */
  14
  15 /* Include files */
  16
  17 #include "config.h"
  18
  19 /*
  20 #define DEBUG
  21 */
  22
  23 #include <epan/packet.h>
  24 #include "wimax_mac.h"
  25 #include "wimax_utils.h"
  26
  27 void proto_register_mac_mgmt_msg_dsa(void);
  28 void proto_reg_handoff_mac_mgmt_msg_dsa(void);
  29
  30 static dissector_handle_t dsa_req_handle;
  31 static dissector_handle_t dsa_rsp_handle;
  32 static dissector_handle_t dsa_ack_handle;
  33
  34 static int proto_mac_mgmt_msg_dsa_decoder;
  35 static int ett_mac_mgmt_msg_dsa_req_decoder;
  36 static int ett_mac_mgmt_msg_dsa_rsp_decoder;
  37 static int ett_mac_mgmt_msg_dsa_ack_decoder;
  38
  39 /* fix fields */
  40 static int hf_dsa_transaction_id;
  41 static int hf_dsa_confirmation_code;
  42
  43 static int dissect_mac_mgmt_msg_dsa_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  44 {
  45         unsigned offset = 0;
  46         proto_item *dsa_item;
  47         proto_tree *dsa_tree;
  48
  49         {       /* we are being asked for details */
  50
  51                 /* display MAC message type */
  52                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
  53                                                           "Dynamic Service Addition Request (DSA-REQ)");
  54                 /* add MAC DSx subtree */
  55                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_req_decoder);
  56                 /* Decode and display the Uplink Channel Descriptor (UCD) */
  57                 /* display the Transaction ID */
  58                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
  59                 /* move to next field */
  60                 offset += 2;
  61                 /* process DSA-REQ message TLV Encode Information */
  62                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
  63         }
  64         return tvb_captured_length(tvb);
  65 }
  66
  67 static int dissect_mac_mgmt_msg_dsa_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  68 {
  69         unsigned offset = 0;
  70         proto_item *dsa_item;
  71         proto_tree *dsa_tree;
  72
  73         {       /* we are being asked for details */
  74                 /* display MAC message type */
  75                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
  76                                                         "Dynamic Service Addition Response (DSA-RSP)");
  77                 /* add MAC DSx subtree */
  78                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_rsp_decoder);
  79                 /* Decode and display the Uplink Channel Descriptor (UCD) */
  80                 /* display the Transaction ID */
  81                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
  82                 /* move to next field */
  83                 offset += 2;
  84                 /* display the Confirmation Code */
  85                 proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
  86                 /* move to next field */
  87                 offset++;
  88                 /* process DSA RSP message TLV Encode Information */
  89                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
  90         }
  91         return tvb_captured_length(tvb);
  92 }
  93
  94 static int dissect_mac_mgmt_msg_dsa_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  95 {
  96         unsigned offset = 0;
  97         proto_item *dsa_item;
  98         proto_tree *dsa_tree;
  99
 100         {       /* we are being asked for details */
 101                 /* display MAC message type */
 102                 dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
 103                                                         "Dynamic Service Addition Acknowledge (DSA-ACK)");
 104                 /* add MAC DSx subtree */
 105                 dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_ack_decoder);
 106                 /* Decode and display the Uplink Channel Descriptor (UCD) */
 107                 /* display the Transaction ID */
 108                 proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 109                 /* move to next field */
 110                 offset += 2;
 111                 /* display the Confirmation Code */
 112                 proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
 113                 /* move to next field */
 114                 offset++;
 115                 /* process DSA-REQ message TLV Encode Information */
 116                 wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
 117         }
 118         return tvb_captured_length(tvb);
 119 }
 120
 121 /* Register Wimax Mac Payload Protocol and Dissector */
 122 void proto_register_mac_mgmt_msg_dsa(void)
 123 {
 124         /* DSx display */
 125         static hf_register_info hf[] =
 126         {
 127                 {
 128                         &hf_dsa_confirmation_code,
 129                         {
 130                                 "Confirmation code", "wmx.dsa.confirmation_code",
 131                                 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL
 132                         }
 133                 },
 134                 {
 135                         &hf_dsa_transaction_id,
 136                         {
 137                                 "Transaction ID", "wmx.dsa.transaction_id",
 138                                 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
 139                         }
 140                 }
 141         };
 142
 143         /* Setup protocol subtree array */
 144         static int *ett[] =
 145                 {
 146                         &ett_mac_mgmt_msg_dsa_req_decoder,
 147                         &ett_mac_mgmt_msg_dsa_rsp_decoder,
 148                         &ett_mac_mgmt_msg_dsa_ack_decoder,
 149                 };
 150
 151         proto_mac_mgmt_msg_dsa_decoder = proto_register_protocol (
 152                 "WiMax DSA Messages", /* name       */
 153                 "WiMax DSA",     /* short name */
 154                 "wmx.dsa"        /* abbrev     */
 155                 );
 156
 157         proto_register_field_array(proto_mac_mgmt_msg_dsa_decoder, hf, array_length(hf));
 158         proto_register_subtree_array(ett, array_length(ett));
 159
 160         dsa_req_handle = register_dissector("mac_mgmt_msg_dsa_req_handler", dissect_mac_mgmt_msg_dsa_req_decoder, proto_mac_mgmt_msg_dsa_decoder);
 161         dsa_rsp_handle = register_dissector("mac_mgmt_msg_dsa_rsp_handler", dissect_mac_mgmt_msg_dsa_rsp_decoder, proto_mac_mgmt_msg_dsa_decoder);
 162         dsa_ack_handle = register_dissector("mac_mgmt_msg_dsa_ack_handler", dissect_mac_mgmt_msg_dsa_ack_decoder, proto_mac_mgmt_msg_dsa_decoder);
 163 }
 164
 165 void
 166 proto_reg_handoff_mac_mgmt_msg_dsa (void)
 167 {
 168         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_REQ, dsa_req_handle);
 169         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_RSP, dsa_rsp_handle);
 170         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_ACK, dsa_ack_handle);
 171 }
 172
 173 /*
 174  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 175  *
 176  * Local variables:
 177  * c-basic-offset: 8
 178  * tab-width: 8
 179  * indent-tabs-mode: t
 180  * End:
 181  *
 182  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 183  * :indentSize=8:tabSize=8:noTabs=false:
 184  */