184 lines
5.7 KiB
C
184 lines
5.7 KiB
C
/* msg_dsa.c
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* WiMax MAC Management DSA-REQ/RSP/ACK Messages decoder
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*
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* Copyright (c) 2007 by Intel Corporation.
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*
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* Author: Lu Pan <lu.pan@intel.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1999 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/* Include files */
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#include "config.h"
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/*
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#define DEBUG
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*/
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#include <epan/packet.h>
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#include "wimax_mac.h"
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#include "wimax_utils.h"
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void proto_register_mac_mgmt_msg_dsa(void);
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void proto_reg_handoff_mac_mgmt_msg_dsa(void);
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static gint proto_mac_mgmt_msg_dsa_decoder = -1;
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static gint ett_mac_mgmt_msg_dsa_req_decoder = -1;
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static gint ett_mac_mgmt_msg_dsa_rsp_decoder = -1;
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static gint ett_mac_mgmt_msg_dsa_ack_decoder = -1;
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/* fix fields */
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static gint hf_dsa_transaction_id = -1;
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static gint hf_dsa_confirmation_code = -1;
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static int dissect_mac_mgmt_msg_dsa_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0;
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proto_item *dsa_item;
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proto_tree *dsa_tree;
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{ /* we are being asked for details */
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/* display MAC message type */
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dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
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"Dynamic Service Addition Request (DSA-REQ)");
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/* add MAC DSx subtree */
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dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_req_decoder);
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/* Decode and display the Uplink Channel Descriptor (UCD) */
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/* display the Transaction ID */
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proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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/* move to next field */
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offset += 2;
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/* process DSA-REQ message TLV Encode Information */
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wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
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}
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return tvb_captured_length(tvb);
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}
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static int dissect_mac_mgmt_msg_dsa_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0;
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proto_item *dsa_item;
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proto_tree *dsa_tree;
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{ /* we are being asked for details */
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/* display MAC message type */
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dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
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"Dynamic Service Addition Response (DSA-RSP)");
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/* add MAC DSx subtree */
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dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_rsp_decoder);
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/* Decode and display the Uplink Channel Descriptor (UCD) */
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/* display the Transaction ID */
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proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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/* move to next field */
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offset += 2;
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/* display the Confirmation Code */
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proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* move to next field */
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offset++;
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/* process DSA RSP message TLV Encode Information */
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wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
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}
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return tvb_captured_length(tvb);
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}
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static int dissect_mac_mgmt_msg_dsa_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0;
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proto_item *dsa_item;
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proto_tree *dsa_tree;
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{ /* we are being asked for details */
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/* display MAC message type */
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dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
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"Dynamic Service Addition Acknowledge (DSA-ACK)");
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/* add MAC DSx subtree */
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dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_ack_decoder);
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/* Decode and display the Uplink Channel Descriptor (UCD) */
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/* display the Transaction ID */
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proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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/* move to next field */
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offset += 2;
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/* display the Confirmation Code */
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proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* move to next field */
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offset++;
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/* process DSA-REQ message TLV Encode Information */
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wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
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}
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return tvb_captured_length(tvb);
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}
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/* Register Wimax Mac Payload Protocol and Dissector */
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void proto_register_mac_mgmt_msg_dsa(void)
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{
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/* DSx display */
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static hf_register_info hf[] =
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{
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{
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&hf_dsa_confirmation_code,
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{
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"Confirmation code", "wmx.dsa.confirmation_code",
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FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dsa_transaction_id,
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{
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"Transaction ID", "wmx.dsa.transaction_id",
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FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
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}
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}
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};
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/* Setup protocol subtree array */
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static gint *ett[] =
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{
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&ett_mac_mgmt_msg_dsa_req_decoder,
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&ett_mac_mgmt_msg_dsa_rsp_decoder,
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&ett_mac_mgmt_msg_dsa_ack_decoder,
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};
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proto_mac_mgmt_msg_dsa_decoder = proto_register_protocol (
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"WiMax DSA Messages", /* name */
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"WiMax DSA", /* short name */
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"wmx.dsa" /* abbrev */
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);
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proto_register_field_array(proto_mac_mgmt_msg_dsa_decoder, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_mac_mgmt_msg_dsa (void)
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{
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dissector_handle_t dsa_handle;
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dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_req_decoder, proto_mac_mgmt_msg_dsa_decoder);
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dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_REQ, dsa_handle);
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dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_rsp_decoder, proto_mac_mgmt_msg_dsa_decoder);
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dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_RSP, dsa_handle);
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dsa_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsa_ack_decoder, proto_mac_mgmt_msg_dsa_decoder);
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dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_ACK, dsa_handle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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