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/* msg_dsa.c
* WiMax MAC Management DSA-REQ/RSP/ACK 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_mac.h"
#include "wimax_utils.h"
void proto_register_mac_mgmt_msg_dsa(void);
void proto_reg_handoff_mac_mgmt_msg_dsa(void);
static dissector_handle_t dsa_req_handle;
static dissector_handle_t dsa_rsp_handle;
static dissector_handle_t dsa_ack_handle;
static gint proto_mac_mgmt_msg_dsa_decoder = -1;
static gint ett_mac_mgmt_msg_dsa_req_decoder = -1;
static gint ett_mac_mgmt_msg_dsa_rsp_decoder = -1;
static gint ett_mac_mgmt_msg_dsa_ack_decoder = -1;
/* fix fields */
static gint hf_dsa_transaction_id = -1;
static gint hf_dsa_confirmation_code = -1;
static int dissect_mac_mgmt_msg_dsa_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint offset = 0;
proto_item *dsa_item;
proto_tree *dsa_tree;
{ /* we are being asked for details */
/* display MAC message type */
dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
"Dynamic Service Addition Request (DSA-REQ)");
/* add MAC DSx subtree */
dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_req_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Transaction ID */
proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* process DSA-REQ message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
}
return tvb_captured_length(tvb);
}
static int dissect_mac_mgmt_msg_dsa_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint offset = 0;
proto_item *dsa_item;
proto_tree *dsa_tree;
{ /* we are being asked for details */
/* display MAC message type */
dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
"Dynamic Service Addition Response (DSA-RSP)");
/* add MAC DSx subtree */
dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_rsp_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Transaction ID */
proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Confirmation Code */
proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* process DSA RSP message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
}
return tvb_captured_length(tvb);
}
static int dissect_mac_mgmt_msg_dsa_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint offset = 0;
proto_item *dsa_item;
proto_tree *dsa_tree;
{ /* we are being asked for details */
/* display MAC message type */
dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, -1,
"Dynamic Service Addition Acknowledge (DSA-ACK)");
/* add MAC DSx subtree */
dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_ack_decoder);
/* Decode and display the Uplink Channel Descriptor (UCD) */
/* display the Transaction ID */
proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Confirmation Code */
proto_tree_add_item(dsa_tree, hf_dsa_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* process DSA-REQ message TLV Encode Information */
wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsa_tree);
}
return tvb_captured_length(tvb);
}
/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_dsa(void)
{
/* DSx display */
static hf_register_info hf[] =
{
{
&hf_dsa_confirmation_code,
{
"Confirmation code", "wmx.dsa.confirmation_code",
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL
}
},
{
&hf_dsa_transaction_id,
{
"Transaction ID", "wmx.dsa.transaction_id",
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
}
}
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_mac_mgmt_msg_dsa_req_decoder,
&ett_mac_mgmt_msg_dsa_rsp_decoder,
&ett_mac_mgmt_msg_dsa_ack_decoder,
};
proto_mac_mgmt_msg_dsa_decoder = proto_register_protocol (
"WiMax DSA Messages", /* name */
"WiMax DSA", /* short name */
"wmx.dsa" /* abbrev */
);
proto_register_field_array(proto_mac_mgmt_msg_dsa_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
dsa_req_handle = register_dissector("mac_mgmt_msg_dsa_req_handler", dissect_mac_mgmt_msg_dsa_req_decoder, proto_mac_mgmt_msg_dsa_decoder);
dsa_rsp_handle = register_dissector("mac_mgmt_msg_dsa_rsp_handler", dissect_mac_mgmt_msg_dsa_rsp_decoder, proto_mac_mgmt_msg_dsa_decoder);
dsa_ack_handle = register_dissector("mac_mgmt_msg_dsa_ack_handler", dissect_mac_mgmt_msg_dsa_ack_decoder, proto_mac_mgmt_msg_dsa_decoder);
}
void
proto_reg_handoff_mac_mgmt_msg_dsa (void)
{
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_REQ, dsa_req_handle);
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_RSP, dsa_rsp_handle);
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSA_ACK, dsa_ack_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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