/* packet-m2m.c
* Routines for WiMax MAC to MAC TLV packet disassembly
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: Lu Pan <lu.pan@intel.com>
*
* $Id: packet-m2m.c 22435 2007-08-01 17:42:43Z jake $
*
* 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.
*/
/* Include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/reassemble.h>
#include <epan/etypes.h>
#include <plugins/wimax/wimax_tlv.h>
/* forward reference */
static void dissect_m2m(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void fch_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo);
static void cdma_code_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo);
static void pdu_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo, gint burst_number, gint frag_type, gint frag_number);
static void fast_feedback_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo);
static void harq_ack_bursts_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo);
static void physical_attributes_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo);
static void extended_tlv_decoder(packet_info *pinfo);
void proto_tree_add_tlv(tlv_info_t *this, tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, gint hf);
/* Global variables */
gint sequence_number = 0;
GHashTable *pdu_frag_table = NULL;
guint g_frame_number = 0;
/* Local Variables */
static gint proto_m2m = -1;
static dissector_handle_t m2m_handle = NULL;
static dissector_handle_t wimax_fch_burst_handle = NULL;
static dissector_handle_t wimax_cdma_code_burst_handle = NULL;
static dissector_handle_t wimax_pdu_burst_handle = NULL;
static dissector_handle_t wimax_ffb_burst_handle = NULL;
static dissector_handle_t wimax_hack_burst_handle = NULL;
static dissector_handle_t wimax_phy_attributes_burst_handle = NULL;
static gint ett_m2m = -1;
static gint ett_m2m_tlv = -1;
static gint ett_m2m_fch = -1;
static gint ett_m2m_cdma = -1;
static gint ett_m2m_ffb = -1;
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_m2m,
&ett_m2m_tlv,
&ett_m2m_fch,
&ett_m2m_cdma,
&ett_m2m_ffb,
};
/* TLV types (rev:0.2) */
#define TLV_PROTO_VER 1
#define TLV_FRAME_NUM 2
#define TLV_BURST_NUM 3
#define TLV_FRAG_TYPE 4
#define TLV_FRAG_NUM 5
#define TLV_CDMA_CODE 7
#define TLV_FCH_BURST 8
#define TLV_PDU_BURST 9
#define TLV_FAST_FB 10
#define TLV_CRC16_STATUS 11
#define TLV_BURST_POWER 12
#define TLV_BURST_CINR 13
#define TLV_PREAMBLE 14
#define TLV_HARQ_ACK_BURST 15
#define TLV_PHY_ATTRIBUTES 16
#define TLV_EXTENDED_TLV 255
/* TLV names */
static const value_string tlv_name[] =
{
{ TLV_PROTO_VER, "Protocol Version" },
{ TLV_FRAME_NUM, "Frame Number" },
{ TLV_BURST_NUM, "Burst Number" },
{ TLV_FRAG_TYPE, "Fragment Type" },
{ TLV_FRAG_NUM, "Fragment Number" },
{ TLV_CDMA_CODE, "CDMA Attribute" },
{ TLV_FCH_BURST, "FCH Burst" },
{ TLV_PDU_BURST, "PDU Burst" },
{ TLV_FAST_FB, "Fast Feedback Burst" },
{ TLV_CRC16_STATUS, "CRC16 Status" },
{ TLV_BURST_POWER, " Burst Power" },
{ TLV_BURST_CINR, "Burst CINR" },
{ TLV_PREAMBLE, "Preamble" },
{ TLV_HARQ_ACK_BURST, "HARQ ACK Bursts" },
{ TLV_PHY_ATTRIBUTES, "PDU Burst Physical Attributes" },
{ TLV_EXTENDED_TLV, "Extended TLV" },
{ 0, NULL }
};
/* TLV Fragment types */
#define TLV_NO_FRAG 0
#define TLV_FIRST_FRAG 1
#define TLV_MIDDLE_FRAG 2
#define TLV_LAST_FRAG 3
/* TLV Fragment Type names */
static const value_string tlv_frag_type_name[] =
{
{ TLV_NO_FRAG, "No TLV Fragment" },
{ TLV_FIRST_FRAG, "First TLV Fragment" },
{ TLV_MIDDLE_FRAG, "Middle TLV Fragment" },
{ TLV_LAST_FRAG, "Last TLV Fragment" },
{ 0, NULL }
};
/* TLV CRC16 Status */
static const value_string tlv_crc16_status[] =
{
{ 0, "No CRC-16 in burst" },
{ 1, "Good CRC-16 in burst" },
{ 2, "Bad CRC-16 in burst" },
{ 0, NULL }
};
static gint hf_m2m_sequence_number = -1;
static gint hf_m2m_frame_number = -1;
static gint hf_m2m_tlv_count = -1;
/* M2M TLV display */
static hf_register_info hf[] =
{
{
&hf_m2m_sequence_number,
{
"Packet Sequence Number", "m2m.seq_number",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_frame_number,
{
"Value", "m2m.frame_number",
FT_UINT24, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_tlv_count,
{
"Number of TLVs in the packet", "m2m.tlv_count",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
}
};
static gint hf_m2m_type = -1;
static gint hf_m2m_len = -1;
static gint hf_m2m_len_size = -1;
static gint hf_m2m_value_bytes = -1;
static gint hf_wimax_invalid_tlv = -1;
static gint hf_m2m_value_protocol_vers_uint8 = -1;
static gint hf_m2m_value_burst_num_uint8 = -1;
static gint hf_m2m_value_frag_type_uint8 = -1;
static gint hf_m2m_value_frag_num_uint8 = -1;
static gint hf_m2m_value_pdu_burst = -1;
static gint hf_m2m_value_fast_fb = -1;
static gint hf_m2m_value_fch_burst_uint24 = -1;
static gint hf_m2m_value_cdma_code_uint24 = -1;
static gint hf_m2m_value_crc16_status_uint8 = -1;
static gint hf_m2m_value_burst_power_uint16 = -1;
static gint hf_m2m_value_burst_cinr_uint16 = -1;
static gint hf_m2m_value_preamble_uint16 = -1;
static gint hf_m2m_value_harq_ack_burst_bytes = -1;
static gint hf_m2m_phy_attributes = -1;
/* WiMax TLV display */
static hf_register_info hf_tlv[] =
{
{
&hf_m2m_type,
{
"Type", "m2m.tlv_type",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_len,
{
"Length", "m2m.tlv_len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_len_size,
{
"Length Size", "m2m.tlv_len_size",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_bytes,
{
"Value (hex)", "m2m.multibyte_tlv_value",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_protocol_vers_uint8,
{
"Value", "m2m.protocol_vers_tlv_value",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_burst_num_uint8,
{
"Value", "m2m.burst_num_tlv_value",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_frag_type_uint8,
{
"Value", "m2m.frag_type_tlv_value",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_frag_num_uint8,
{
"Value", "m2m.frag_num_tlv_value",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_pdu_burst,
{
"Value (hex)", "m2m.pdu_burst_tlv_value",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_fast_fb,
{
"Value (hex)", "m2m.fast_fb_tlv_value",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_fch_burst_uint24,
{
"Value", "m2m.fch_burst_tlv_value",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_cdma_code_uint24,
{
"Value", "m2m.cdma_code_tlv_value",
FT_UINT24, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_crc16_status_uint8,
{
"Value", "m2m.crc16_status_tlv_value",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_burst_power_uint16,
{
"Value", "m2m.burst_power_tlv_value",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_burst_cinr_uint16,
{
"Value", "m2m.burst_cinr_tlv_value",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_preamble_uint16,
{
"Value", "m2m.preamble_tlv_value",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_value_harq_ack_burst_bytes,
{
"Value (hex)", "m2m.harq_ack_burst_tlv_value",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_m2m_phy_attributes,
{
"Value (hex)", "m2m.phy_attributes",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_wimax_invalid_tlv,
{
"Invalid TLV (hex)", "m2m.invalid_tlv",
FT_BYTES, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
}
};
/* Register M2M defrag table init routine. */
static void
m2m_defragment_init(void)
{
fragment_table_init(&pdu_frag_table);
}
/* Register Wimax Mac to Mac Protocol handler */
void proto_reg_handoff_m2m(void)
{
static int Initialized = FALSE;
if (!Initialized)
{
m2m_handle = create_dissector_handle(dissect_m2m, proto_m2m);
dissector_add("ethertype", ETHERTYPE_WMX_M2M, m2m_handle);
}
}
/* Register Wimax Mac to Mac Protocol */
void proto_register_m2m(void)
{
if (proto_m2m == -1)
{
proto_m2m = proto_register_protocol (
"WiMax Mac to Mac Packet", /* name */
"M2M (m2m)", /* short name */
"m2m" /* abbrev */
);
proto_register_field_array(proto_m2m, hf, array_length(hf));
proto_register_field_array(proto_m2m, hf_tlv, array_length(hf_tlv));
proto_register_subtree_array(ett, array_length(ett));
}
prefs_register_protocol(proto_m2m, proto_reg_handoff_m2m);
/* init the PDU fragment table */
fragment_table_init(&pdu_frag_table);
/* Register the PDU fragment table init routine */
register_init_routine(m2m_defragment_init);
/* Add new protocols here */
}
/* WiMax MAC to MAC protocol dissector */
static void dissect_m2m(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti = NULL;
proto_item *m2m_item = NULL;
proto_tree *m2m_tree = NULL;
proto_tree *tlv_tree = NULL;
gint burst_number = 0;
gint length, offset = 0;
gint tlv_count;
gint tlv_type, tlv_len, tlv_offset, tlv_value;
gint tlv_frag_type = 0;
gint tlv_frag_number = 0;
tlv_info_t m2m_tlv_info;
gint hf = 0;
/* display the M2M protocol name */
if (check_col(pinfo->cinfo, COL_PROTOCOL))
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "WiMax");
}
/* Clear out stuff in the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_clear(pinfo->cinfo, COL_INFO);
}
{ /* we are being asked for details */
m2m_item = proto_tree_add_item(tree, proto_m2m, tvb, 0, -1, FALSE);
m2m_tree = proto_item_add_subtree(m2m_item, ett_m2m);
/* get the tvb reported length */
length = tvb_reported_length(tvb);
/* add the size info */
/*
proto_item_append_text(m2m_item, " (%u bytes) - Packet Sequence Number,Number of TLVs", length);
*/
proto_item_append_text(m2m_item, " (%u bytes)", length);
/* get the sequence number */
sequence_number = tvb_get_ntohs(tvb, offset);
/* display the sequence number */
proto_tree_add_item(m2m_tree, hf_m2m_sequence_number, tvb, offset, 2, FALSE);
offset += 2;
/* display the TLV count */
proto_tree_add_item(m2m_tree, hf_m2m_tlv_count, tvb, offset, 2, FALSE);
tlv_count = tvb_get_ntohs(tvb, offset);
offset += 2;
/* parses the TLVs within current packet */
while ( tlv_count > 0)
{ /* init MAC to MAC TLV information */
init_tlv_info(&m2m_tlv_info, tvb, offset);
/* get the TLV type */
tlv_type = get_tlv_type(&m2m_tlv_info);
/* get the TLV length */
tlv_len = get_tlv_length(&m2m_tlv_info);
if(tlv_type == -1 || tlv_len > 64000 || tlv_len < 1)
{ /* invalid tlv info */
if(pinfo->cinfo)
{
col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", "M2M TLV error");
}
/* display the invalid TLV in HEX */
proto_tree_add_item(m2m_tree, hf_wimax_invalid_tlv, tvb, offset, (length - offset), FALSE);
break;
}
/* get the TLV value offset */
tlv_offset = get_tlv_value_offset(&m2m_tlv_info);
/* display TLV type */
ti = proto_tree_add_protocol_format(m2m_tree, proto_m2m, tvb, offset, (tlv_len + tlv_offset), val_to_str(tlv_type, tlv_name, "Unknown TLV"));
/* add TLV subtree */
tlv_tree = proto_item_add_subtree(ti, ett_m2m_tlv);
/* update the offset */
offset += tlv_offset;
/* add the size info */
/* decode TLV content (TLV value) */
switch (tlv_type)
{
case TLV_PROTO_VER:
/* get the protocol version */
tlv_value = tvb_get_guint8( tvb, offset );
/* add the description */
proto_item_append_text(ti, ": %d", tlv_value);
hf = hf_m2m_value_protocol_vers_uint8;
break;
case TLV_BURST_NUM:
/* get the burst number */
burst_number = tvb_get_guint8( tvb, offset );
/* add the description */
proto_item_append_text(ti, ": %d", burst_number);
hf = hf_m2m_value_burst_num_uint8;
break;
case TLV_FRAG_TYPE:
/* add the description */
tlv_frag_type = tvb_get_guint8( tvb, offset );
proto_item_append_text(ti, ": %s", val_to_str(tlv_frag_type, tlv_frag_type_name, "Unknown"));
hf = hf_m2m_value_frag_type_uint8;
break;
case TLV_FRAG_NUM:
/* get the fragment number */
tlv_frag_number = tvb_get_guint8( tvb, offset );
/* add the description */
proto_item_append_text(ti, ": %d", tlv_frag_number);
hf = hf_m2m_value_frag_num_uint8;
break;
case TLV_PDU_BURST:
/* display PDU Burst length info */
proto_item_append_text(ti, " (%u bytes)", tlv_len);
/* decode and display the PDU Burst */
pdu_burst_decoder(tree, tvb, offset, tlv_len, pinfo, burst_number, tlv_frag_type, tlv_frag_number);
hf = hf_m2m_value_pdu_burst;
break;
case TLV_FAST_FB:
/* display the Fast Feedback Burst length info */
proto_item_append_text(ti, " (%u bytes)", tlv_len);
/* decode and display the Fast Feedback Burst */
fast_feedback_burst_decoder(tree, tvb, offset, tlv_len, pinfo);
hf = hf_m2m_value_fast_fb;
break;
case TLV_FRAME_NUM:
/* get the frame number */
g_frame_number = tvb_get_ntoh24( tvb, offset );
/* add the description */
proto_tree_add_item(tlv_tree, hf_m2m_frame_number, tvb, offset, 3, FALSE);
proto_item_append_text(ti, ": %d", g_frame_number);
break;
case TLV_FCH_BURST:
/* add the description */
tlv_value = tvb_get_ntoh24( tvb, offset );
proto_item_append_text(ti, ": 0x%X", tlv_value);
/* decode and display the TLV FCH bust */
fch_burst_decoder(tree, tvb, offset, tlv_len, pinfo);
hf = hf_m2m_value_fch_burst_uint24;
break;
case TLV_CDMA_CODE:
/* add the description */
tlv_value = tvb_get_ntoh24( tvb, offset );
proto_item_append_text(ti, ": 0x%X", tlv_value);
/* decode and display the CDMA Code */
cdma_code_decoder(tree, tvb, offset, tlv_len, pinfo);
hf = hf_m2m_value_cdma_code_uint24;
break;
case TLV_CRC16_STATUS:
/* add the description */
tlv_value = tvb_get_guint8( tvb, offset );
proto_item_append_text(ti, ": %s", val_to_str(tlv_value, tlv_crc16_status, "Unknown"));
hf = hf_m2m_value_crc16_status_uint8;
break;
case TLV_BURST_POWER:
/* add the description */
tlv_value = tvb_get_ntohs( tvb, offset );
proto_item_append_text(ti, ": %d", tlv_value);
hf = hf_m2m_value_burst_power_uint16;
break;
case TLV_BURST_CINR:
/* add the description */
tlv_value = tvb_get_ntohs( tvb, offset );
proto_item_append_text(ti, ": 0x%X", tlv_value);
hf = hf_m2m_value_burst_cinr_uint16;
break;
case TLV_PREAMBLE:
/* add the description */
tlv_value = tvb_get_ntohs( tvb, offset );
proto_item_append_text(ti, ": 0x%X", tlv_value);
hf = hf_m2m_value_preamble_uint16;
break;
case TLV_HARQ_ACK_BURST:
/* display the Burst length info */
proto_item_append_text(ti, " (%u bytes)", tlv_len);
/* decode and display the HARQ ACK Bursts */
harq_ack_bursts_decoder(tree, tvb, offset, tlv_len, pinfo);
hf = hf_m2m_value_harq_ack_burst_bytes;
break;
case TLV_PHY_ATTRIBUTES:
/* display the Burst length info */
proto_item_append_text(ti, " (%u bytes)", tlv_len);
/* decode and display the PDU Burst Physical Attributes */
physical_attributes_decoder(tree, tvb, offset, tlv_len, pinfo);
hf = hf_m2m_phy_attributes;
break;
case TLV_EXTENDED_TLV:
/* display the Burst length info */
proto_item_append_text(ti, " (%u bytes)", tlv_len);
/* decode and display the Extended TLV */
extended_tlv_decoder(pinfo);
break;
default:
/* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", "Unknown TLV Type");
}
break;
}
/* expand the TLV detail */
proto_tree_add_tlv(&m2m_tlv_info, tvb, offset - tlv_offset, pinfo, tlv_tree, hf);
offset += tlv_len;
/* update tlv_count */
tlv_count--;
}
}
}
/* Decode and display the FCH burst */
static void fch_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo)
{
/* find the TLV FCH Burst handler */
wimax_fch_burst_handle = find_dissector("wimax_fch_burst_handler");
if(wimax_fch_burst_handle)
{ /* call FCH dissector */
call_dissector(wimax_fch_burst_handle, tvb_new_subset(tvb, offset, length, length), pinfo, tree);
}
else /* display FCH info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "FCH Burst: DL Frame Prefix");
}
}
}
/* Decode and display the CDMA Code Attribute */
static void cdma_code_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo)
{
/* find the TLV CDMA CODE Burst handler */
wimax_cdma_code_burst_handle = find_dissector("wimax_cdma_code_burst_handler");
if(wimax_cdma_code_burst_handle)
{ /* call CDMA dissector */
call_dissector(wimax_cdma_code_burst_handle, tvb_new_subset(tvb, offset, length, length), pinfo, tree);
}
else /* display CDMA Code Attribute info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "CDMA Code Attribute");
}
}
}
/* Decode and display the PDU Burst */
static void pdu_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo, gint burst_number, gint frag_type, gint frag_number)
{
fragment_data *pdu_frag;
tvbuff_t *pdu_tvb = NULL;
gint pdu_length = 0;
/* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
switch (frag_type)
{
case TLV_FIRST_FRAG:
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "First TLV Fragment (%d)", frag_number);
break;
case TLV_LAST_FRAG:
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Last TLV Fragment (%d)", frag_number);
break;
case TLV_MIDDLE_FRAG:
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Middle TLV Fragment %d", frag_number);
break;
}
}
if(frag_type == TLV_NO_FRAG)
{ /* not fragmented PDU */
pdu_tvb = tvb_new_subset(tvb, offset, length, length);
pdu_length = length;
}
else /* fragmented PDU */
{ /* add the frag */
pdu_frag = fragment_add_seq(tvb, offset, pinfo, burst_number, pdu_frag_table, frag_number - 1, length, ((frag_type==TLV_LAST_FRAG)?0:1));
if(pdu_frag && frag_type == TLV_LAST_FRAG)
{
pdu_length = pdu_frag->len;
/* create the new tvb for defraged frame */
pdu_tvb = tvb_new_real_data(pdu_frag->data, pdu_length, pdu_length);
/* attach the pdu_tvb to tvb so that it will be cleaned up when tvb is cleaned up */
tvb_set_child_real_data_tvbuff(tvb, pdu_tvb);
/* add the defragmented data to the data source list */
add_new_data_source(pinfo, pdu_tvb, "Reassembled WiMax PDU Frame");
}
else
{
pdu_tvb = NULL;
if(frag_type == TLV_LAST_FRAG)
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", "Incomplete PDU frame");
}
}
}
/* process the defragmented PDU burst */
if(pdu_tvb)
{ /* find the TLV PDU Burst handler */
wimax_pdu_burst_handle = find_dissector("wimax_pdu_burst_handler");
if(wimax_pdu_burst_handle)
/* decode and display PDU Burst */
call_dissector(wimax_pdu_burst_handle, pdu_tvb, pinfo, tree);
else /* display PDU Burst info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "PDU Burst");
}
}
}
}
/* Decode and display the Fast Feedback Burst */
static void fast_feedback_burst_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo)
{
/* find the TLV Fast Feedback Burst handler */
wimax_ffb_burst_handle = find_dissector("wimax_ffb_burst_handler");
if(wimax_ffb_burst_handle)
{ /* display the TLV Fast Feedback Burst dissector info */
call_dissector(wimax_ffb_burst_handle, tvb_new_subset(tvb, offset, length, length), pinfo, tree);
}
else /* display the Fast Feedback Burst info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "Fast Feedback Burst");
}
}
}
static void harq_ack_bursts_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo)
{
/* find the TLV HARQ ACK Bursts handler */
wimax_hack_burst_handle = find_dissector("wimax_hack_burst_handler");
if(wimax_hack_burst_handle)
{ /* call the TLV HARQ ACK Bursts dissector */
call_dissector(wimax_hack_burst_handle, tvb_new_subset(tvb, offset, length, length), pinfo, tree);
}
else /* display the TLV HARQ ACK Bursts info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "HARQ ACK Bursts");
}
}
}
static void physical_attributes_decoder(proto_tree *tree, tvbuff_t *tvb, gint offset, gint length, packet_info *pinfo)
{
/* find the TLV PDU Burst Physical Attributes handler */
wimax_phy_attributes_burst_handle = find_dissector("wimax_phy_attributes_burst_handler");
if(wimax_phy_attributes_burst_handle)
{ /* call the TLV PDU Burst Physical Attributes dissector */
call_dissector(wimax_phy_attributes_burst_handle, tvb_new_subset(tvb, offset, length, length), pinfo, tree);
}
else /* display the TLV PDU Burst Physical Attributes info */
{ /* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "PHY-attr");
}
}
}
static void extended_tlv_decoder(packet_info *pinfo)
{
/* display the Extended TLV info */
/* update the info column */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_str(pinfo->cinfo, COL_INFO, "Extended TLV");
}
}
/* Display the raw WiMax TLV */
void proto_tree_add_tlv(tlv_info_t *this, tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, gint hf)
{
guint tlv_offset;
gint tlv_type, tlv_len;
/* make sure the TLV information is valid */
if(!this->valid)
{ /* invalid TLV info */
if(pinfo->cinfo)
{
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Invalid TLV");
}
return;
}
tlv_offset = offset;
/* display TLV type */
proto_tree_add_item(tree, hf_m2m_type, tvb, tlv_offset, 1, FALSE);
tlv_offset++;
/* check the TLV length type */
if( this->length_type )
{ /* multiple bytes TLV length */
/* display the length of the TLV length with MSB */
proto_tree_add_item(tree, hf_m2m_len_size, tvb, tlv_offset, 1, FALSE);
tlv_offset++;
if(this->size_of_length)
/* display the multiple byte TLV length */
proto_tree_add_item(tree, hf_m2m_len, tvb, tlv_offset, this->size_of_length, FALSE);
else
return;
}
else /* display the single byte TLV length */
proto_tree_add_item(tree, hf_m2m_len, tvb, tlv_offset, 1, FALSE);
tlv_type = get_tlv_type(this);
/* Display Frame Number as special case for filter */
if ( tlv_type == TLV_FRAME_NUM )
{
return;
}
/* get the TLV length */
tlv_len = get_tlv_length(this);
proto_tree_add_item(tree, hf, tvb, (offset + this->value_offset), tlv_len, FALSE);
}
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