forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Change-Id: I0d485b1337c669291ad58b6c096657ce2db353c8 Reviewed-on: https://code.wireshark.org/review/12516 Reviewed-by: Michael Mann <mmann78@netscape.net>
540 lines
18 KiB
C
540 lines
18 KiB
C
/* msg_dreg.c
|
|
* WiMax MAC Management DREG-REQ, DREG-CMD Message decoders
|
|
*
|
|
* Copyright (c) 2007 by Intel Corporation.
|
|
*
|
|
* Author: John R. Underwood <junderx@yahoo.com>
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
/* Include files */
|
|
|
|
#include "config.h"
|
|
|
|
|
|
#include <epan/packet.h>
|
|
#include "wimax_tlv.h"
|
|
#include "wimax_mac.h"
|
|
#include "wimax_utils.h"
|
|
|
|
extern gboolean include_cor2_changes;
|
|
|
|
void proto_register_mac_mgmt_msg_dreg_req(void);
|
|
void proto_register_mac_mgmt_msg_dreg_cmd(void);
|
|
void proto_reg_handoff_mac_mgmt_msg_dreg(void);
|
|
|
|
/* Forward reference */
|
|
static void dissect_dreg_tlv(proto_tree *dreg_tree, gint tlv_type, tvbuff_t *tvb, guint tlv_offset, guint tlv_len);
|
|
|
|
static gint proto_mac_mgmt_msg_dreg_req_decoder = -1;
|
|
static gint proto_mac_mgmt_msg_dreg_cmd_decoder = -1;
|
|
|
|
static gint ett_mac_mgmt_msg_dreg_decoder = -1;
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] =
|
|
{
|
|
&ett_mac_mgmt_msg_dreg_decoder,
|
|
};
|
|
|
|
/* DREG fields */
|
|
/* static gint hf_ack_type_reserved = -1; */
|
|
static gint hf_dreg_cmd_action = -1;
|
|
static gint hf_dreg_cmd_action_cor2 = -1;
|
|
static gint hf_dreg_cmd_reserved = -1;
|
|
static gint hf_dreg_paging_cycle = -1;
|
|
static gint hf_dreg_paging_offset = -1;
|
|
static gint hf_dreg_paging_group_id = -1;
|
|
static gint hf_dreg_req_duration = -1;
|
|
static gint hf_paging_controller_id = -1;
|
|
static gint hf_mac_hash_skip_threshold = -1;
|
|
static gint hf_dreg_paging_cycle_request = -1;
|
|
static gint hf_dreg_retain_ms_service_sbc = -1;
|
|
static gint hf_dreg_retain_ms_service_pkm = -1;
|
|
static gint hf_dreg_retain_ms_service_reg = -1;
|
|
static gint hf_dreg_retain_ms_service_network_address = -1;
|
|
static gint hf_dreg_retain_ms_service_tod = -1;
|
|
static gint hf_dreg_retain_ms_service_tftp = -1;
|
|
static gint hf_dreg_retain_ms_service_full_service = -1;
|
|
static gint hf_dreg_consider_paging_pref = -1;
|
|
static gint hf_tlv_value = -1;
|
|
static gint hf_dreg_req_action = -1;
|
|
static gint hf_dreg_req_reserved = -1;
|
|
static gint hf_dreg_invalid_tlv = -1;
|
|
|
|
/* STRING RESOURCES */
|
|
static const value_string vals_dreg_req_code[] = {
|
|
{0, "SS De-Registration request from BS and network"},
|
|
{1, "MS request for De-Registration from serving BS and initiation of Idle Mode"},
|
|
{2, "MS response for the Unsolicited De-Registration initiated by BS"},
|
|
{3, "Reject for the unsolicited DREG-CMD with action \
|
|
code 05 (idle mode request) by the BS. \
|
|
Applicable only when MS has pending UL data to transmit"},
|
|
{4, "Reserved"},
|
|
{0, NULL}
|
|
};
|
|
|
|
static const value_string vals_dreg_cmd_action[] = {
|
|
{0, "SS shall immediately terminate service with the BS and \
|
|
should attempt network entry at another BS"},
|
|
{1, "SS shall listen to the current channel BS but shall not \
|
|
transmit until an RES-CMD message or DREG-CMD with \
|
|
Action Code 02 or 03 is received"},
|
|
{2, "SS shall listen to the BS but only transmit \
|
|
on the Basic, and Primary Management Connections"},
|
|
{3, "SS shall return to normal operation and may transmit on \
|
|
any of its active connections"},
|
|
{4, "SS shall terminate current Normal Operations with the BS; \
|
|
the BS shall transmit this action code only in response \
|
|
to any SS DREG-REQ message"},
|
|
{5, "MS shall immediately begin de-registration from serving \
|
|
BS and request initiation of MS Idle Mode"},
|
|
{6, "The MS may retransmit the DREG-REQ message after the \
|
|
time duration (REQ-duration) provided in the message"},
|
|
{7, "The MS shall not retransmit the DREG-REQ message and shall \
|
|
wait for the DREG-CMD message. BS transmittal of a \
|
|
subsequent DREG-CMD with Action Code 03 shall cancel \
|
|
this restriction"},
|
|
{0, NULL}
|
|
};
|
|
|
|
static const value_string vals_dreg_cmd_action_cor2[] = {
|
|
{0, "SS shall immediately terminate service with the BS and \
|
|
should attempt network entry at another BS"},
|
|
{1, "SS shall listen to the current channel BS but shall not \
|
|
transmit until an RES-CMD message or DREG-CMD with \
|
|
Action Code 02 or 03 is received"},
|
|
{2, "SS shall listen to the BS but only transmit \
|
|
on the Basic, and Primary Management Connections"},
|
|
{3, "SS shall return to normal operation and may transmit on \
|
|
any of its active connections"},
|
|
{4, "Only valid in response to a DREG-REQ message with DREG \
|
|
Code = 00. SS shall terminate current Normal Operations with the BS"},
|
|
{5, "MS shall immediately begin de-registration from serving \
|
|
BS and request initiation of MS Idle Mode"},
|
|
{6, "Only valid in response to a DREG-REQ message with DREG \
|
|
Code = 01. The MS may retransmit the DREG-REQ message after the \
|
|
REQ-duration provided in the message; \
|
|
BS sending a subsequent DREG-CMD message with \
|
|
Action Code 03 cancels this restriction"},
|
|
{0, NULL}
|
|
};
|
|
|
|
/* Decode sub-TLV's of either DREG-REQ or DREG-CMD. */
|
|
static void dissect_dreg_tlv(proto_tree *dreg_tree, gint tlv_type, tvbuff_t *tvb, guint tlv_offset, guint tlv_len)
|
|
{
|
|
switch (tlv_type) {
|
|
case DREG_PAGING_INFO:
|
|
proto_tree_add_item(dreg_tree, hf_dreg_paging_cycle, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_paging_offset, tvb, tlv_offset + 2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_paging_group_id, tvb, tlv_offset + 3, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DREG_REQ_DURATION:
|
|
proto_tree_add_item(dreg_tree, hf_dreg_req_duration, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DREG_PAGING_CONTROLLER_ID:
|
|
proto_tree_add_item(dreg_tree, hf_paging_controller_id, tvb, tlv_offset, 6, ENC_NA);
|
|
break;
|
|
case DREG_IDLE_MODE_RETAIN_INFO:
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_sbc, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_pkm, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_reg, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_network_address, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_tod, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_tftp, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_full_service, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dreg_tree, hf_dreg_consider_paging_pref, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DREG_MAC_HASH_SKIP_THRESHOLD:
|
|
proto_tree_add_item(dreg_tree, hf_mac_hash_skip_threshold, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DREG_PAGING_CYCLE_REQUEST:
|
|
proto_tree_add_item(dreg_tree, hf_dreg_paging_cycle_request, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
default:
|
|
proto_tree_add_item(dreg_tree, hf_tlv_value, tvb, tlv_offset, tlv_len, ENC_NA);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Register Wimax Mac Payload Protocol and Dissector */
|
|
void proto_register_mac_mgmt_msg_dreg_req(void)
|
|
{
|
|
/* DREG fields display */
|
|
static hf_register_info hf[] =
|
|
{
|
|
{
|
|
&hf_dreg_consider_paging_pref,
|
|
{
|
|
"Consider Paging Preference of each Service Flow in resource retention", "wmx.dreg.consider_paging_preference",
|
|
FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_invalid_tlv,
|
|
{
|
|
"Invalid TLV", "wmx.dreg.invalid_tlv",
|
|
FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_mac_hash_skip_threshold,
|
|
{
|
|
"MAC Hash Skip Threshold", "wmx.dreg.mac_hash_skip_threshold",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_paging_controller_id,
|
|
{
|
|
"Paging Controller ID", "wmx.dreg.paging_controller_id",
|
|
FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_paging_cycle,
|
|
{
|
|
"PAGING CYCLE", "wmx.dreg.paging_cycle",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_paging_cycle_request,
|
|
{
|
|
"Paging Cycle Request", "wmx.dreg.paging_cycle_request",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_paging_group_id,
|
|
{
|
|
"Paging-group-ID", "wmx.dreg.paging_group_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_paging_offset,
|
|
{
|
|
"PAGING OFFSET", "wmx.dreg.paging_offset",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_req_duration,
|
|
{
|
|
"REQ-duration (Waiting value for the DREG-REQ message re-transmission in frames)", "wmx.dreg.req_duration",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_full_service,
|
|
{
|
|
"Retain MS service and operation information associated with Full service", "wmx.dreg.retain_ms_full_service",
|
|
FT_UINT8, BASE_DEC, NULL, 0x40, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_network_address,
|
|
{
|
|
"Retain MS service and operational information associated with Network Address", "wmx.dreg.retain_ms_service_network_address",
|
|
FT_UINT8, BASE_DEC, NULL, 0x08, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_pkm,
|
|
{
|
|
"Retain MS service and operational information associated with PKM-REQ/RSP", "wmx.dreg.retain_ms_service_pkm",
|
|
FT_UINT8, BASE_DEC, NULL, 0x02, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_reg,
|
|
{
|
|
"Retain MS service and operational information associated with REG-REQ/RSP", "wmx.dreg.retain_ms_service_reg",
|
|
FT_UINT8, BASE_DEC, NULL, 0x04, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_sbc,
|
|
{
|
|
"Retain MS service and operational information associated with SBC-REQ/RSP", "wmx.dreg.retain_ms_service_sbc",
|
|
FT_UINT8, BASE_DEC, NULL, 0x01, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_tftp,
|
|
{
|
|
"Retain MS service and operational information associated with TFTP messages", "wmx.dreg.retain_ms_service_tftp",
|
|
FT_UINT8, BASE_DEC, NULL, 0x20, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_retain_ms_service_tod,
|
|
{
|
|
"Retain MS service and operational information associated with Time of Day", "wmx.dreg.retain_ms_service_tod",
|
|
FT_UINT8, BASE_DEC, NULL, 0x10, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_cmd_action,
|
|
{
|
|
"DREG-CMD Action code", "wmx.dreg_cmd.action",
|
|
FT_UINT8, BASE_DEC, VALS(vals_dreg_cmd_action), 0x07, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_cmd_action_cor2,
|
|
{
|
|
"DREG-CMD Action code", "wmx.dreg_cmd.action",
|
|
FT_UINT8, BASE_DEC, VALS(vals_dreg_cmd_action_cor2), 0x07, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_cmd_reserved,
|
|
{
|
|
"Reserved", "wmx.dreg_cmd.action_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF8, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_req_action,
|
|
{
|
|
"DREG-REQ Action code", "wmx.dreg_req.action",
|
|
FT_UINT8, BASE_DEC, VALS(vals_dreg_req_code), 0x03, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_dreg_req_reserved,
|
|
{
|
|
"Reserved", "wmx.dreg_req.action_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0xFC, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_tlv_value,
|
|
{
|
|
"Value", "wmx.dreg.unknown_tlv_value",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL
|
|
}
|
|
},
|
|
#if 0
|
|
{
|
|
&hf_ack_type_reserved,
|
|
{
|
|
"Reserved", "wmx.ack_type_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0x03, NULL, HFILL
|
|
}
|
|
}
|
|
#endif
|
|
};
|
|
|
|
proto_mac_mgmt_msg_dreg_req_decoder = proto_register_protocol (
|
|
"WiMax DREG-REQ Messages", /* name */
|
|
"WiMax DREG-REQ", /* short name */
|
|
"wmx.dreg_req" /* abbrev */
|
|
);
|
|
|
|
proto_register_field_array(proto_mac_mgmt_msg_dreg_req_decoder, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
/* Register Wimax Mac Payload Protocol and Dissector */
|
|
void proto_register_mac_mgmt_msg_dreg_cmd(void)
|
|
{
|
|
proto_mac_mgmt_msg_dreg_cmd_decoder = proto_register_protocol (
|
|
"WiMax DREG-CMD Messages", /* name */
|
|
"WiMax DREG-CMD", /* short name */
|
|
"wmx.dreg_cmd" /* abbrev */
|
|
);
|
|
}
|
|
|
|
/* Decode DREG-REQ messages. */
|
|
static int dissect_mac_mgmt_msg_dreg_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint offset = 0;
|
|
guint tlv_offset;
|
|
guint tvb_len;
|
|
proto_item *dreg_req_item;
|
|
proto_tree *dreg_req_tree;
|
|
proto_tree *tlv_tree = NULL;
|
|
tlv_info_t tlv_info;
|
|
gint tlv_type;
|
|
gint tlv_len;
|
|
gboolean hmac_found = FALSE;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* Get the tvb reported length */
|
|
tvb_len = tvb_reported_length(tvb);
|
|
/* display MAC payload type DREG-REQ */
|
|
dreg_req_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, 0, -1, "MAC Management Message, DREG-REQ");
|
|
/* add MAC DREG REQ subtree */
|
|
dreg_req_tree = proto_item_add_subtree(dreg_req_item, ett_mac_mgmt_msg_dreg_decoder);
|
|
/* display the Action Code */
|
|
proto_tree_add_item(dreg_req_tree, hf_dreg_req_action, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/* show the Reserved bits */
|
|
proto_tree_add_item(dreg_req_tree, hf_dreg_req_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
while(offset < tvb_len)
|
|
{
|
|
/* Get the TLV data. */
|
|
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, "DREG-REQ TLV error");
|
|
proto_tree_add_item(dreg_req_tree, hf_dreg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
|
|
break;
|
|
}
|
|
/* get the offset to the TLV data */
|
|
tlv_offset = offset + get_tlv_value_offset(&tlv_info);
|
|
|
|
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_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "HMAC Tuple");
|
|
wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
hmac_found = TRUE;
|
|
break;
|
|
case CMAC_TUPLE: /* Table 348b */
|
|
/* decode and display the CMAC Tuple */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "CMAC Tuple");
|
|
wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
default:
|
|
/* Decode DREG-REQ sub-TLV's */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "DREG-REQ sub-TLV's");
|
|
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
}
|
|
|
|
|
|
offset = tlv_len + tlv_offset;
|
|
} /* end of TLV process while loop */
|
|
if (!hmac_found)
|
|
proto_item_append_text(dreg_req_tree, " (HMAC Tuple is missing !)");
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Decode DREG-CMD messages. */
|
|
static int dissect_mac_mgmt_msg_dreg_cmd_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint offset = 0;
|
|
guint tlv_offset;
|
|
guint tvb_len;
|
|
proto_item *dreg_cmd_item;
|
|
proto_tree *dreg_cmd_tree;
|
|
proto_tree *tlv_tree = NULL;
|
|
tlv_info_t tlv_info;
|
|
gint tlv_type;
|
|
gint tlv_len;
|
|
gboolean hmac_found = FALSE;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* Get the tvb reported length */
|
|
tvb_len = tvb_reported_length(tvb);
|
|
/* display MAC payload type DREG-CMD */
|
|
dreg_cmd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, 0, -1, "MAC Management Message, DREG-CMD");
|
|
/* add MAC DREG CMD subtree */
|
|
dreg_cmd_tree = proto_item_add_subtree(dreg_cmd_item, ett_mac_mgmt_msg_dreg_decoder);
|
|
/* display the Action Code */
|
|
if (include_cor2_changes)
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action_cor2, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
else
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/* show the Reserved bits */
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset ++;
|
|
|
|
while(offset < tvb_len)
|
|
{
|
|
/* Get the TLV data. */
|
|
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, "DREG-CMD TLV error");
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
|
|
break;
|
|
}
|
|
/* get the offset to the TLV data */
|
|
tlv_offset = offset + get_tlv_value_offset(&tlv_info);
|
|
|
|
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_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "HMAC Tuple");
|
|
wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
hmac_found = TRUE;
|
|
break;
|
|
case CMAC_TUPLE: /* Table 348b */
|
|
/* decode and display the CMAC Tuple */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "CMAC Tuple");
|
|
wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
default:
|
|
/* Decode DREG-CMD sub-TLV's */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "DREG-CMD sub-TLV's");
|
|
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
}
|
|
|
|
offset = tlv_len + tlv_offset;
|
|
} /* end of TLV process while loop */
|
|
if (!hmac_found)
|
|
proto_item_append_text(dreg_cmd_tree, " (HMAC Tuple is missing !)");
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_mac_mgmt_msg_dreg(void)
|
|
{
|
|
dissector_handle_t dreg_handle;
|
|
|
|
dreg_handle = create_dissector_handle(dissect_mac_mgmt_msg_dreg_req_decoder, proto_mac_mgmt_msg_dreg_req_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DREG_REQ, dreg_handle);
|
|
|
|
dreg_handle = create_dissector_handle(dissect_mac_mgmt_msg_dreg_cmd_decoder, proto_mac_mgmt_msg_dreg_cmd_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DREG_CMD, dreg_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://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:
|
|
*/
|