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/* msg_dsc.c
* WiMax MAC Management DSC-REQ/RSP/ACK Messages decoder
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: Lu Pan <lu.pan@intel.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
#define DEBUG
*/
#include <glib.h>
#include <epan/packet.h>
#include "wimax_tlv.h"
#include "wimax_mac.h"
#include "wimax_utils.h"
extern gint proto_mac_mgmt_msg_dsa_decoder;
static gint proto_mac_mgmt_msg_dsc_decoder = -1;
static gint ett_mac_mgmt_msg_dsc_req_decoder = -1;
static gint ett_mac_mgmt_msg_dsc_rsp_decoder = -1;
static gint ett_mac_mgmt_msg_dsc_ack_decoder = -1;
static const value_string vals_dsc_msgs[] = {
{ MAC_MGMT_MSG_DSC_REQ, "Dynamic Service Change Request (DSC-REQ)" },
{ MAC_MGMT_MSG_DSC_RSP, "Dynamic Service Change Response (DSC-RSP)" },
{ MAC_MGMT_MSG_DSC_ACK, "Dynamic Service Change Acknowledge (DSC-ACK)" },
{ 0, NULL }
};
/* fix fields */
static gint hf_dsc_req_message_type = -1;
static gint hf_dsc_transaction_id = -1;
static gint hf_dsc_rsp_message_type = -1;
static gint hf_dsc_confirmation_code = -1;
static gint hf_dsc_ack_message_type = -1;
void dissect_mac_mgmt_msg_dsc_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tvb_len, payload_type;
proto_item *dsc_item = NULL;
proto_tree *dsc_tree = NULL;
if(tree)
{ /* we are being asked for details */
/* get the message type */
payload_type = tvb_get_guint8(tvb, offset);
/* ensure the message type is DSC REQ/RSP/ACK */
if(payload_type != MAC_MGMT_MSG_DSC_REQ)
return;
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len,
"%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len);
/* add MAC DSx subtree */
dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_req_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Message Type */
proto_tree_add_item(dsc_tree, hf_dsc_req_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* display the Transaction ID */
proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* process DSC REQ message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree);
}
}
void dissect_mac_mgmt_msg_dsc_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tvb_len, payload_type;
proto_item *dsc_item = NULL;
proto_tree *dsc_tree = NULL;
if(tree)
{ /* we are being asked for details */
/* get the message type */
payload_type = tvb_get_guint8(tvb, offset);
/* ensure the message type is DSC REQ/RSP/ACK */
if(payload_type != MAC_MGMT_MSG_DSC_RSP)
return;
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len,
"%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len);
/* add MAC DSx subtree */
dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_rsp_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Message Type */
proto_tree_add_item(dsc_tree, hf_dsc_rsp_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* display the Transaction ID */
proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Confirmation Code */
proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* process DSC RSP message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree);
}
}
void dissect_mac_mgmt_msg_dsc_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tvb_len, payload_type;
proto_item *dsc_item = NULL;
proto_tree *dsc_tree = NULL;
if(tree)
{ /* we are being asked for details */
/* get the message type */
payload_type = tvb_get_guint8(tvb, offset);
/* ensure the message type is DSC REQ/RSP/ACK */
if((payload_type < MAC_MGMT_MSG_DSC_REQ) || (payload_type > MAC_MGMT_MSG_DSC_ACK))
return;
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len,
"%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len);
/* add MAC DSx subtree */
dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_ack_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Message Type */
proto_tree_add_item(dsc_tree, hf_dsc_ack_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* display the Transaction ID */
proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Confirmation Code */
proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* process DSC ACK message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree);
}
}
/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_dsc(void)
{
/* DSx display */
static hf_register_info hf[] =
{
{
&hf_dsc_ack_message_type,
{
"MAC Management Message Type", "wmx.macmgtmsgtype.dsc_ack",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsc_req_message_type,
{
"MAC Management Message Type", "wmx.macmgtmsgtype.dsc_req",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsc_rsp_message_type,
{
"MAC Management Message Type", "wmx.macmgtmsgtype.dsc_rsp",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsc_confirmation_code,
{
"Confirmation code", "wmx.dsc.confirmation_code",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsc_transaction_id,
{
"Transaction ID", "wmx.dsc.transaction_id",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
}
}
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_mac_mgmt_msg_dsc_req_decoder,
&ett_mac_mgmt_msg_dsc_rsp_decoder,
&ett_mac_mgmt_msg_dsc_ack_decoder
};
proto_mac_mgmt_msg_dsc_decoder = proto_mac_mgmt_msg_dsa_decoder;
proto_register_field_array(proto_mac_mgmt_msg_dsc_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
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