279 lines
9.2 KiB
C
279 lines
9.2 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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* 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_tlv.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_dsd(void);
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void proto_reg_handoff_mac_mgmt_msg_dsd(void);
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static 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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/* fix fields */
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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_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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static int dissect_mac_mgmt_msg_dsd_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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guint tvb_len, tlv_len, tlv_value_offset;
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gint tlv_type;
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proto_item *dsd_item;
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proto_tree *dsd_tree;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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{ /* we are being asked for details */
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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, -1,
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"Dynamic Service Deletion Request (DSD-REQ)");
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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 Transaction ID */
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proto_tree_add_item(dsd_tree, hf_dsd_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 Service Flow ID */
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proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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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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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD-REQ TLV error");
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proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
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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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/* 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");
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wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_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");
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wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_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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add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA);
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break;
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}
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offset += (tlv_len+tlv_value_offset);
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} /* end of while loop */
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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_dsd_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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guint tvb_len, tlv_len, tlv_value_offset;
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gint tlv_type;
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proto_item *dsd_item;
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proto_tree *dsd_tree;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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{ /* we are being asked for details */
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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, -1,
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"Dynamic Service Deletion Response (DSD-RSP)");
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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 Transaction ID */
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proto_tree_add_item(dsd_tree, hf_dsd_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(dsd_tree, hf_dsd_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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/* display the Service Flow ID */
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proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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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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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DSD RSP TLV error");
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proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
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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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/* 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");
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wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_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");
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wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
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break;
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default:
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add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA);
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break;
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}
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offset += (tlv_len+tlv_value_offset);
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} /* end of while loop */
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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_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_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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&hf_dsd_invalid_tlv,
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{
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"Invalid TLV", "wmx.dsd.invalid_tlv",
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FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dsd_unknown_type,
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{
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"Unknown type", "wmx.dsd.unknown_type",
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FT_BYTES, BASE_NONE, 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_register_protocol (
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"WiMax DSD Messages", /* name */
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"WiMax DSD", /* short name */
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"wmx.dsd" /* abbrev */
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);
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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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void
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proto_reg_handoff_mac_mgmt_msg_dsd(void)
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{
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dissector_handle_t dsd_handle;
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dsd_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsd_req_decoder, proto_mac_mgmt_msg_dsd_decoder);
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dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_REQ, dsd_handle);
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dsd_handle = create_dissector_handle(dissect_mac_mgmt_msg_dsd_rsp_decoder, proto_mac_mgmt_msg_dsd_decoder);
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dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_RSP, dsd_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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