3e44421764
1169-1172. svn path=/trunk/; revision=36500
166 lines
5.7 KiB
C
166 lines
5.7 KiB
C
/* msg_res_cmd.c
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* WiMax MAC Management RES-CMD Message 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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/*
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#define DEBUG // for debug only
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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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#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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static gint proto_mac_mgmt_msg_res_cmd_decoder = -1;
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static gint ett_mac_mgmt_msg_res_cmd_decoder = -1;
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/* fix fields */
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static gint hf_res_cmd_message_type = -1;
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static gint hf_res_cmd_unknown_type = -1;
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static gint hf_res_cmd_invalid_tlv = -1;
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/* Wimax Mac RES-CMD Message Dissector */
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void dissect_mac_mgmt_msg_res_cmd_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;
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gint tlv_type, tlv_len, tlv_value_offset;
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proto_item *res_cmd_item = NULL;
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proto_tree *res_cmd_tree = NULL;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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/* Ensure the right payload type */
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payload_type = tvb_get_guint8(tvb, offset);
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if(payload_type != MAC_MGMT_MSG_RES_CMD)
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{
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return;
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}
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if(tree)
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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 payload type RES-CMD */
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res_cmd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, tvb_len, "Reset Command (RES-CMD) (%u bytes)", tvb_len);
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/* add MAC RES-CMD subtree */
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res_cmd_tree = proto_item_add_subtree(res_cmd_item, ett_mac_mgmt_msg_res_cmd_decoder);
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/* Decode and display the Reset Command (RES-CMD) */
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/* display the Message Type */
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proto_tree_add_item(res_cmd_tree, hf_res_cmd_message_type, tvb, offset, 1, FALSE);
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/* set the offset for the TLV Encoded info */
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offset++;
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/* process the RES-CMD TLVs */
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while(offset < tvb_len)
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{
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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, "RES-CMD TLV error");
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proto_tree_add_item(res_cmd_tree, hf_res_cmd_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(res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, (tlv_len + tlv_value_offset), "RES-CMD Type: %u (%u bytes, offset=%u, tlv_len=%u, tvb_len=%u)", tlv_type, (tlv_len + tlv_value_offset), offset, tlv_len, tvb_len);
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#endif
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/* update the offset for the TLV value */
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offset += tlv_value_offset;
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/* process RES-CMD TLV Encoded information */
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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_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_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_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_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_tlv_subtree(&tlv_info, ett_mac_mgmt_msg_res_cmd_decoder, res_cmd_tree, hf_res_cmd_unknown_type, tvb, offset, tlv_len, FALSE);
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proto_tree_add_item(tlv_tree, hf_res_cmd_unknown_type, tvb, offset, tlv_len, FALSE);
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break;
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}
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offset += tlv_len;
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} /* end of TLV process while loop */
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}
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}
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/* Register Wimax Mac RES-CMD Message Dissector */
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void proto_register_mac_mgmt_msg_res_cmd(void)
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{
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/* DSx display */
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static hf_register_info hf_res_cmd[] =
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{
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{
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&hf_res_cmd_message_type,
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{"MAC Management Message Type", "wmx.macmgtmsgtype.res_cmd", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
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},
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{
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&hf_res_cmd_invalid_tlv,
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{"Invalid TLV", "wmx.res_cmd.invalid_tlv", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL}
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},
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{
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&hf_res_cmd_unknown_type,
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{"Unknown TLV type", "wmx.res_cmd.unknown_tlv_type", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}
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}
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};
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/* Setup protocol subtree array */
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static gint *ett_res_cmd[] =
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{
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&ett_mac_mgmt_msg_res_cmd_decoder,
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};
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proto_mac_mgmt_msg_res_cmd_decoder = proto_register_protocol (
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"WiMax RES-CMD Message", /* name */
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"WiMax RES-CMD (res)", /* short name */
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"wmx.res" /* abbrev */
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);
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proto_register_field_array(proto_mac_mgmt_msg_res_cmd_decoder, hf_res_cmd, array_length(hf_res_cmd));
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proto_register_subtree_array(ett_res_cmd, array_length(ett_res_cmd));
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}
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