305 lines
11 KiB
C
305 lines
11 KiB
C
/* msg_dsd.c
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* WiMax MAC Management DSD-REQ/RSP 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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* $Id$
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* Include files */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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#define DEBUG
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*/
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#include <glib.h>
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#include <epan/packet.h>
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#include "wimax_tlv.h"
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#include "wimax_mac.h"
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#include "wimax_utils.h"
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extern gint proto_mac_mgmt_msg_dsa_decoder;
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gint proto_mac_mgmt_msg_dsd_decoder = -1;
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static gint ett_mac_mgmt_msg_dsd_req_decoder = -1;
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static gint ett_mac_mgmt_msg_dsd_rsp_decoder = -1;
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/* static gint ett_dsd_ul_sfe_decoder = -1; */
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/* static gint ett_dsd_dl_sfe_decoder = -1; */
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/* static gint ett_dsd_hmac_tuple = -1; */
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/* static gint ett_dsd_cmac_tuple = -1; */
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static const value_string vals_dsd_msgs[] =
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{
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{ MAC_MGMT_MSG_DSD_REQ, "Dynamic Service Deletion Request (DSD-REQ)" },
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{ MAC_MGMT_MSG_DSD_RSP, "Dynamic Service Deletion Response (DSD-RSP)" },
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{ 0, NULL }
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};
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/* fix fields */
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static gint hf_dsd_req_message_type = -1;
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static gint hf_dsd_transaction_id = -1;
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static gint hf_dsd_service_flow_id = -1;
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static gint hf_dsd_rsp_message_type = -1;
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static gint hf_dsd_confirmation_code = -1;
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static gint hf_dsd_invalid_tlv = -1;
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static gint hf_dsd_unknown_type = -1;
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void dissect_mac_mgmt_msg_dsd_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint offset = 0;
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guint tvb_len, payload_type, tlv_len, tlv_value_offset;
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gint tlv_type;
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proto_item *dsd_item = NULL;
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proto_tree *dsd_tree = NULL;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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if(tree)
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{ /* we are being asked for details */
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/* get the message type */
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payload_type = tvb_get_guint8(tvb, offset);
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/* ensure the message type is DSD REQ/RSP/ACK */
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if(payload_type != MAC_MGMT_MSG_DSD_REQ)
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return;
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/* Get the tvb reported length */
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tvb_len = tvb_reported_length(tvb);
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/* display MAC message type */
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dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tvb_len,
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"%s (%u bytes)", val_to_str(payload_type, vals_dsd_msgs, "Unknown"), tvb_len);
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/* add MAC DSx subtree */
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dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_req_decoder);
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/* Decode and display the DSD message */
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/* display the Message Type */
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proto_tree_add_item(dsd_tree, hf_dsd_req_message_type, tvb, offset, 1, FALSE);
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/* move to next field */
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offset++;
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/* display the Transaction ID */
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proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, FALSE);
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/* move to next field */
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offset += 2;
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/* display the Service Flow ID */
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proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, FALSE);
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/* move to next field */
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offset += 4;
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/* process DSD REQ message TLV Encode Information */
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while(offset < tvb_len)
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{ /* get the TLV information */
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init_tlv_info(&tlv_info, tvb, offset);
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/* get the TLV type */
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tlv_type = get_tlv_type(&tlv_info);
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/* get the TLV length */
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tlv_len = get_tlv_length(&tlv_info);
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if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
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{ /* invalid tlv info */
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if(check_col(pinfo->cinfo, COL_INFO))
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{
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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD-REQ TLV error");
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}
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proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE);
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break;
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}
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/* get the TLV value offset */
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tlv_value_offset = get_tlv_value_offset(&tlv_info);
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#ifdef DEBUG /* for debug only */
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proto_tree_add_protocol_format(dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len + tlv_value_offset, "DSD-REQ TLV Type: %u (%u bytes, offset=%u, tvb_len=%u)", tlv_type, tlv_len + tlv_value_offset, offset, tvb_len);
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#endif
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/* update the offset */
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offset += tlv_value_offset;
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/* process TLV */
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switch (tlv_type)
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{
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case HMAC_TUPLE: /* Table 348d */
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/* decode and display the HMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
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wimax_hmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
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break;
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case CMAC_TUPLE: /* Table 348b */
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/* decode and display the CMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
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wimax_cmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
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break;
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default:
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/* display the unknown tlv in hex */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "Unknown TLV (%u byte(s))", tlv_len);
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proto_tree_add_item(tlv_tree, hf_dsd_unknown_type, tvb, (offset - tlv_value_offset), (tlv_len + tlv_value_offset), FALSE);
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break;
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}
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offset += tlv_len;
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} /* end of while loop */
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}
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}
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void dissect_mac_mgmt_msg_dsd_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint offset = 0;
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guint tvb_len, payload_type, tlv_len, tlv_value_offset;
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gint tlv_type;
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proto_item *dsd_item = NULL;
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proto_tree *dsd_tree = NULL;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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if(tree)
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{ /* we are being asked for details */
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/* get the message type */
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payload_type = tvb_get_guint8(tvb, offset);
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/* ensure the message type is DSD REQ/RSP/ACK */
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if(payload_type != MAC_MGMT_MSG_DSD_RSP)
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return;
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/* Get the tvb reported length */
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tvb_len = tvb_reported_length(tvb);
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/* display MAC message type */
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dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tvb_len,
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"%s (%u bytes)", val_to_str(payload_type, vals_dsd_msgs, "Unknown"), tvb_len);
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/* add MAC DSx subtree */
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dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_rsp_decoder);
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/* Decode and display the DSD message */
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/* display the Message Type */
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proto_tree_add_item(dsd_tree, hf_dsd_rsp_message_type, tvb, offset, 1, FALSE);
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/* move to next field */
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offset++;
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/* display the Transaction ID */
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proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, FALSE);
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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(dsd_tree, hf_dsd_confirmation_code, tvb, offset, 1, FALSE);
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/* move to next field */
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offset++;
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/* display the Service Flow ID */
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proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, FALSE);
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/* move to next field */
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offset += 4;
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/* process DSD RSP message TLV Encode Information */
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while(offset < tvb_len)
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{ /* get the TLV information */
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init_tlv_info(&tlv_info, tvb, offset);
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/* get the TLV type */
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tlv_type = get_tlv_type(&tlv_info);
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/* get the TLV length */
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tlv_len = get_tlv_length(&tlv_info);
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if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
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{ /* invalid tlv info */
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if(check_col(pinfo->cinfo, COL_INFO))
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{
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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD RSP TLV error");
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}
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proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE);
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break;
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}
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/* get the TLV value offset */
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tlv_value_offset = get_tlv_value_offset(&tlv_info);
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#ifdef DEBUG /* for debug only */
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proto_tree_add_protocol_format(dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len + tlv_value_offset, "DSD-RSP TLV Type: %u (%u bytes, offset=%u, tvb_len=%u)", tlv_type, tlv_len + tlv_value_offset, offset, tvb_len);
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#endif
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/* update the offset */
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offset += tlv_value_offset;
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/* process TLV */
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switch (tlv_type)
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{
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case HMAC_TUPLE: /* Table 348d */
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/* decode and display the HMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
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wimax_hmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
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break;
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case CMAC_TUPLE: /* Table 348b */
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/* decode and display the CMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
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wimax_cmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
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break;
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default:
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/* display the unknown tlv in hex */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "Unknown TLV (%u byte(s))", tlv_len);
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proto_tree_add_item(tlv_tree, hf_dsd_unknown_type, tvb, (offset - tlv_value_offset), (tlv_len + tlv_value_offset), FALSE);
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break;
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}
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offset += tlv_len;
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} /* end of while loop */
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}
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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_dsd(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_dsd_req_message_type,
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{
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"MAC Management Message Type", "wmx.macmgtmsgtype.dsd_req",
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FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dsd_rsp_message_type,
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{
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"MAC Management Message Type", "wmx.macmgtmsgtype.dsd_rsp",
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FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
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}
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},
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{
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&hf_dsd_confirmation_code,
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{
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"Confirmation code", "wmx.dsd.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_dsd_service_flow_id,
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{
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"Service Flow ID", "wmx.dsd.service_flow_id",
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FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dsd_transaction_id,
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{
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"Transaction ID", "wmx.dsd.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_dsd_req_decoder,
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&ett_mac_mgmt_msg_dsd_rsp_decoder,
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/* &ett_dsd_ul_sfe_decoder, */
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/* &ett_dsd_dl_sfe_decoder, */
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/* &ett_dsd_hmac_tuple, */
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/* &ett_dsd_cmac_tuple, */
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};
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proto_mac_mgmt_msg_dsd_decoder = proto_mac_mgmt_msg_dsa_decoder;
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proto_register_field_array(proto_mac_mgmt_msg_dsd_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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