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/* msg_dsd.c
* WiMax MAC Management DSD-REQ/RSP Messages decoder
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: Lu Pan <lu.pan@intel.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* Include files */
#include "config.h"
/*
#define DEBUG
*/
#include <epan/packet.h>
#include "wimax_tlv.h"
#include "wimax_mac.h"
#include "wimax_utils.h"
void proto_register_mac_mgmt_msg_dsd(void);
void proto_reg_handoff_mac_mgmt_msg_dsd(void);
static dissector_handle_t dsd_req_handle;
static dissector_handle_t dsd_rsp_handle;
static int proto_mac_mgmt_msg_dsd_decoder;
static int ett_mac_mgmt_msg_dsd_req_decoder;
static int ett_mac_mgmt_msg_dsd_rsp_decoder;
/* static int ett_dsd_ul_sfe_decoder; */
/* static int ett_dsd_dl_sfe_decoder; */
/* static int ett_dsd_hmac_tuple; */
/* static int ett_dsd_cmac_tuple; */
/* fix fields */
static int hf_dsd_transaction_id;
static int hf_dsd_service_flow_id;
static int hf_dsd_confirmation_code;
static int hf_dsd_invalid_tlv;
static int hf_dsd_unknown_type;
static int dissect_mac_mgmt_msg_dsd_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
unsigned offset = 0;
unsigned tvb_len, tlv_len, tlv_value_offset;
int tlv_type;
proto_item *dsd_item;
proto_tree *dsd_tree;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, -1,
"Dynamic Service Deletion Request (DSD-REQ)");
/* add MAC DSx subtree */
dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_req_decoder);
/* Decode and display the DSD message */
/* display the Transaction ID */
proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Service Flow ID */
proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN);
/* move to next field */
offset += 4;
/* process DSD REQ message TLV Encode Information */
while(offset < tvb_len)
{ /* get the TLV information */
init_tlv_info(&tlv_info, tvb, offset);
/* get the TLV type */
tlv_type = get_tlv_type(&tlv_info);
/* get the TLV length */
tlv_len = get_tlv_length(&tlv_info);
if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
{ /* invalid tlv info */
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD-REQ TLV error");
proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
break;
}
/* get the TLV value offset */
tlv_value_offset = get_tlv_value_offset(&tlv_info);
#ifdef DEBUG /* for debug only */
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);
#endif
/* process TLV */
switch (tlv_type)
{
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
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");
wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
case CMAC_TUPLE: /* Table 348b */
/* decode and display the CMAC Tuple */
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");
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
default:
/* display the unknown tlv in hex */
add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA);
break;
}
offset += (tlv_len+tlv_value_offset);
} /* end of while loop */
}
return tvb_captured_length(tvb);
}
static int dissect_mac_mgmt_msg_dsd_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
unsigned offset = 0;
unsigned tvb_len, tlv_len, tlv_value_offset;
int tlv_type;
proto_item *dsd_item;
proto_tree *dsd_tree;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, -1,
"Dynamic Service Deletion Response (DSD-RSP)");
/* add MAC DSx subtree */
dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_rsp_decoder);
/* Decode and display the DSD message */
/* display the Transaction ID */
proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Confirmation Code */
proto_tree_add_item(dsd_tree, hf_dsd_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* display the Service Flow ID */
proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN);
/* move to next field */
offset += 4;
/* process DSD RSP message TLV Encode Information */
while(offset < tvb_len)
{ /* get the TLV information */
init_tlv_info(&tlv_info, tvb, offset);
/* get the TLV type */
tlv_type = get_tlv_type(&tlv_info);
/* get the TLV length */
tlv_len = get_tlv_length(&tlv_info);
if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
{ /* invalid tlv info */
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD RSP TLV error");
proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
break;
}
/* get the TLV value offset */
tlv_value_offset = get_tlv_value_offset(&tlv_info);
#ifdef DEBUG /* for debug only */
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);
#endif
/* process TLV */
switch (tlv_type)
{
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
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");
wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
case CMAC_TUPLE: /* Table 348b */
/* decode and display the CMAC Tuple */
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");
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
default:
add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA);
break;
}
offset += (tlv_len+tlv_value_offset);
} /* end of while loop */
}
return tvb_captured_length(tvb);
}
/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_dsd(void)
{
/* DSx display */
static hf_register_info hf[] =
{
{
&hf_dsd_confirmation_code,
{
"Confirmation code", "wmx.dsd.confirmation_code",
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsd_service_flow_id,
{
"Service Flow ID", "wmx.dsd.service_flow_id",
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsd_transaction_id,
{
"Transaction ID", "wmx.dsd.transaction_id",
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsd_invalid_tlv,
{
"Invalid TLV", "wmx.dsd.invalid_tlv",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsd_unknown_type,
{
"Unknown type", "wmx.dsd.unknown_type",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
}
}
};
/* Setup protocol subtree array */
static int *ett[] =
{
&ett_mac_mgmt_msg_dsd_req_decoder,
&ett_mac_mgmt_msg_dsd_rsp_decoder,
/* &ett_dsd_ul_sfe_decoder, */
/* &ett_dsd_dl_sfe_decoder, */
/* &ett_dsd_hmac_tuple, */
/* &ett_dsd_cmac_tuple, */
};
proto_mac_mgmt_msg_dsd_decoder = proto_register_protocol (
"WiMax DSD Messages", /* name */
"WiMax DSD", /* short name */
"wmx.dsd" /* abbrev */
);
proto_register_field_array(proto_mac_mgmt_msg_dsd_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
dsd_req_handle = register_dissector("mac_mgmt_msg_dsd_req_handler", dissect_mac_mgmt_msg_dsd_req_decoder, proto_mac_mgmt_msg_dsd_decoder);
dsd_rsp_handle = register_dissector("mac_mgmt_msg_dsd_rsp_handler", dissect_mac_mgmt_msg_dsd_rsp_decoder, proto_mac_mgmt_msg_dsd_decoder);
}
void
proto_reg_handoff_mac_mgmt_msg_dsd(void)
{
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_REQ, dsd_req_handle);
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_RSP, dsd_rsp_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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