forked from osmocom/wireshark
166 lines
5.8 KiB
C
166 lines
5.8 KiB
C
/* msg_res_cmd.c
|
|
* WiMax MAC Management RES-CMD Message 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.
|
|
*/
|
|
|
|
/*
|
|
#define DEBUG // for debug only
|
|
*/
|
|
|
|
/* Include files */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include <epan/packet.h>
|
|
#include "wimax_tlv.h"
|
|
#include "wimax_mac.h"
|
|
#include "wimax_utils.h"
|
|
|
|
static gint proto_mac_mgmt_msg_res_cmd_decoder = -1;
|
|
static gint ett_mac_mgmt_msg_res_cmd_decoder = -1;
|
|
|
|
/* fix fields */
|
|
static gint hf_res_cmd_message_type = -1;
|
|
static gint hf_res_cmd_unknown_type = -1;
|
|
static gint hf_res_cmd_invalid_tlv = -1;
|
|
|
|
|
|
/* Wimax Mac RES-CMD Message Dissector */
|
|
void dissect_mac_mgmt_msg_res_cmd_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint offset = 0;
|
|
guint tvb_len, payload_type;
|
|
gint tlv_type, tlv_len, tlv_value_offset;
|
|
proto_item *res_cmd_item = NULL;
|
|
proto_tree *res_cmd_tree = NULL;
|
|
proto_tree *tlv_tree = NULL;
|
|
tlv_info_t tlv_info;
|
|
|
|
/* Ensure the right payload type */
|
|
payload_type = tvb_get_guint8(tvb, offset);
|
|
if(payload_type != MAC_MGMT_MSG_RES_CMD)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if(tree)
|
|
{ /* we are being asked for details */
|
|
/* Get the tvb reported length */
|
|
tvb_len = tvb_reported_length(tvb);
|
|
/* display MAC payload type RES-CMD */
|
|
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);
|
|
/* add MAC RES-CMD subtree */
|
|
res_cmd_tree = proto_item_add_subtree(res_cmd_item, ett_mac_mgmt_msg_res_cmd_decoder);
|
|
/* Decode and display the Reset Command (RES-CMD) */
|
|
/* display the Message Type */
|
|
proto_tree_add_item(res_cmd_tree, hf_res_cmd_message_type, tvb, offset, 1, FALSE);
|
|
/* set the offset for the TLV Encoded info */
|
|
offset++;
|
|
/* process the RES-CMD TLVs */
|
|
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, "RES-CMD TLV error");
|
|
proto_tree_add_item(res_cmd_tree, hf_res_cmd_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE);
|
|
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(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);
|
|
#endif
|
|
/* update the offset for the TLV value */
|
|
offset += tlv_value_offset;
|
|
/* process RES-CMD TLV Encoded information */
|
|
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_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
|
|
wimax_hmac_tuple_decoder(tlv_tree, tvb, 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_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
|
|
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
|
|
break;
|
|
default:
|
|
/* display the unknown tlv in hex */
|
|
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);
|
|
proto_tree_add_item(res_cmd_tree, hf_res_cmd_unknown_type, tvb, offset, tlv_len, FALSE);
|
|
break;
|
|
}
|
|
offset += tlv_len;
|
|
} /* end of TLV process while loop */
|
|
}
|
|
}
|
|
|
|
/* Register Wimax Mac RES-CMD Message Dissector */
|
|
void proto_register_mac_mgmt_msg_res_cmd(void)
|
|
{
|
|
/* DSx display */
|
|
static hf_register_info hf_res_cmd[] =
|
|
{
|
|
{
|
|
&hf_res_cmd_message_type,
|
|
{"MAC Management Message Type", "wmx.macmgtmsgtype.res_cmd", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{
|
|
&hf_res_cmd_invalid_tlv,
|
|
{"Invalid TLV", "wmx.res_cmd.invalid_tlv", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL}
|
|
},
|
|
{
|
|
&hf_res_cmd_unknown_type,
|
|
{"Unknown TLV type", "wmx.res_cmd.unknown_tlv_type", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
}
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett_res_cmd[] =
|
|
{
|
|
&ett_mac_mgmt_msg_res_cmd_decoder,
|
|
};
|
|
|
|
proto_mac_mgmt_msg_res_cmd_decoder = proto_register_protocol (
|
|
"WiMax RES-CMD Message", /* name */
|
|
"WiMax RES-CMD (res)", /* short name */
|
|
"wmx.res" /* abbrev */
|
|
);
|
|
|
|
proto_register_field_array(proto_mac_mgmt_msg_res_cmd_decoder, hf_res_cmd, array_length(hf_res_cmd));
|
|
proto_register_subtree_array(ett_res_cmd, array_length(ett_res_cmd));
|
|
}
|