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wireshark/plugins/docsis/packet-ucd.c

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/* packet-ucd.c
* Routines for Type 2 UCD Message dissection
* Copyright 2015, Adrian Simionov <daniel.simionov@gmail.com>
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 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 "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#define UCD_SYMBOL_RATE 1
#define UCD_FREQUENCY 2
#define UCD_PREAMBLE 3
#define UCD_BURST_DESCR 4
#define UCD_BURST_DESCR5 5
#define UCD_EXT_PREAMBLE 6
#define UCD_SCDMA_MODE_ENABLED 7
#define UCD_MAINTAIN_POWER_SPECTRAL_DENSITY 15
#define UCD_RANGING_REQUIRED 16
#define UCD_RANGING_HOLD_OFF_PRIORITY_FIELD 18
#define UCD_RANGING_CHANNEL_CLASS_ID 19
#define UCD_MODULATION 1
#define UCD_DIFF_ENCODING 2
#define UCD_PREAMBLE_LEN 3
#define UCD_PREAMBLE_VAL_OFF 4
#define UCD_FEC 5
#define UCD_FEC_CODEWORD 6
#define UCD_SCRAMBLER_SEED 7
#define UCD_MAX_BURST 8
#define UCD_GUARD_TIME 9
#define UCD_LAST_CW_LEN 10
#define UCD_SCRAMBLER_ONOFF 11
#define UCD_RS_INT_DEPTH 12
#define UCD_RS_INT_BLOCK 13
#define UCD_PREAMBLE_TYPE 14
#define IUC_REQUEST 1
#define IUC_REQ_DATA 2
#define IUC_INIT_MAINT 3
#define IUC_STATION_MAINT 4
#define IUC_SHORT_DATA_GRANT 5
#define IUC_LONG_DATA_GRANT 6
#define IUC_NULL_IE 7
#define IUC_DATA_ACK 8
#define IUC_ADV_PHY_SHORT_DATA_GRANT 9
#define IUC_ADV_PHY_LONG_DATA_GRANT 10
#define IUC_ADV_PHY_UGS 11
#define IUC_RESERVED12 12
#define IUC_RESERVED13 13
#define IUC_RESERVED14 14
#define IUC_EXPANSION 15
void proto_register_docsis_ucd(void);
void proto_reg_handoff_docsis_ucd(void);
/* Initialize the protocol and registered fields */
static int proto_docsis_ucd = -1;
static int hf_docsis_ucd_upstream_chid = -1;
static int hf_docsis_ucd_config_ch_cnt = -1;
static int hf_docsis_ucd_mini_slot_size = -1;
static int hf_docsis_ucd_down_chid = -1;
static int hf_docsis_ucd_type = -1;
static int hf_docsis_ucd_length = -1;
static int hf_docsis_ucd_burst_type = -1;
static int hf_docsis_ucd_burst_length = -1;
static int hf_docsis_ucd_symbol_rate = -1;
static int hf_docsis_ucd_frequency = -1;
static int hf_docsis_ucd_preamble_pat = -1;
static int hf_docsis_ucd_ext_preamble_pat = -1;
static int hf_docsis_ucd_scdma_mode_enabled = -1;
static int hf_docsis_ucd_maintain_power_spectral_density = -1;
static int hf_docsis_ucd_ranging_required = -1;
static int hf_docsis_ucd_rnghoff_cm = -1;
static int hf_docsis_ucd_rnghoff_erouter = -1;
static int hf_docsis_ucd_rnghoff_emta = -1;
static int hf_docsis_ucd_rnghoff_estb = -1;
static int hf_docsis_ucd_rnghoff_rsvd = -1;
static int hf_docsis_ucd_rnghoff_id_ext = -1;
static int hf_docsis_ucd_chan_class_id_cm = -1;
static int hf_docsis_ucd_chan_class_id_erouter = -1;
static int hf_docsis_ucd_chan_class_id_emta = -1;
static int hf_docsis_ucd_chan_class_id_estb = -1;
static int hf_docsis_ucd_chan_class_id_rsvd = -1;
static int hf_docsis_ucd_chan_class_id_id_ext = -1;
static int hf_docsis_ucd_iuc = -1;
static int hf_docsis_burst_mod_type = -1;
static int hf_docsis_burst_diff_encoding = -1;
static int hf_docsis_burst_preamble_len = -1;
static int hf_docsis_burst_preamble_val_off = -1;
static int hf_docsis_burst_fec = -1;
static int hf_docsis_burst_fec_codeword = -1;
static int hf_docsis_burst_scrambler_seed = -1;
static int hf_docsis_burst_max_burst = -1;
static int hf_docsis_burst_guard_time = -1;
static int hf_docsis_burst_last_cw_len = -1;
static int hf_docsis_burst_scrambler_onoff = -1;
static int hf_docsis_rs_int_depth = -1;
static int hf_docsis_rs_int_block = -1;
static int hf_docsis_preamble_type = -1;
static expert_field ei_docsis_ucd_tlvlen_bad = EI_INIT;
/* Initialize the subtree pointers */
static gint ett_docsis_ucd = -1;
static gint ett_docsis_tlv = -1;
static gint ett_docsis_burst_tlv = -1;
static dissector_handle_t docsis_ucd_handle;
static const value_string channel_tlv_vals[] = {
{UCD_SYMBOL_RATE, "Symbol Rate"},
{UCD_FREQUENCY, "Frequency"},
{UCD_PREAMBLE, "Preamble Pattern"},
{UCD_BURST_DESCR, "Burst Descriptor Type 4"},
{UCD_BURST_DESCR5, "Burst Descriptor Type 5"},
{UCD_EXT_PREAMBLE, "Extended Preamble Pattern"},
{UCD_SCDMA_MODE_ENABLED, "S-CDMA Mode Enabled"},
{UCD_MAINTAIN_POWER_SPECTRAL_DENSITY, "Maintain Power Spectral Density"},
{UCD_RANGING_REQUIRED, "Ranging Required"},
{UCD_RANGING_HOLD_OFF_PRIORITY_FIELD, "Ranging Hold-Off Priority Field"},
{UCD_RANGING_CHANNEL_CLASS_ID, "Ranging Channel Class ID"},
{0, NULL}
};
static const value_string burst_tlv_vals[] = {
{UCD_MODULATION, "Modulation Type"},
{UCD_DIFF_ENCODING, "Differential Encoding"},
{UCD_PREAMBLE_LEN, "Preamble Length"},
{UCD_PREAMBLE_VAL_OFF, "Preamble Value Offset"},
{UCD_FEC, "FEC Error Correction (T)"},
{UCD_FEC_CODEWORD, "FEC Codeword Information Bytes (k)"},
{UCD_SCRAMBLER_SEED, "Scrambler Seed"},
{UCD_MAX_BURST, "Maximum Burst Size"},
{UCD_GUARD_TIME, "Guard Time Size"},
{UCD_LAST_CW_LEN, "Last Codeword Length"},
{UCD_SCRAMBLER_ONOFF, "Scrambler on/off"},
{UCD_RS_INT_DEPTH, "R-S Interleaver Depth (Ir)"},
{UCD_RS_INT_BLOCK, "R-S Interleaver Block Size (Br)"},
{UCD_PREAMBLE_TYPE, "Preamble Type"},
{0, NULL}
};
static const value_string on_off_vals[] = {
{1, "On"},
{2, "Off"},
{0, NULL}
};
static const true_false_string tfs_allow_inhibit = { "Inhibit Initial Ranging", "Ranging Allowed" };
static const value_string inhibit_allow_vals[] = {
{0, "Inhibit Initial Ranging"},
{1, "Ranging Allowed"},
{0, NULL},
};
static const value_string mod_vals[] = {
{1, "QPSK"},
{2, "16-QAM"},
{3, "8-QAM"},
{4, "32-QAM"},
{5, "64-QAM"},
{6, "128-QAM (SCDMA-only)"},
{7, "Reserved for C-DOCSIS"},
{0, NULL}
};
static const value_string iuc_vals[] = {
{IUC_REQUEST, "Request"},
{IUC_REQ_DATA, "REQ/Data"},
{IUC_INIT_MAINT, "Initial Maintenance"},
{IUC_STATION_MAINT, "Station Maintenance"},
{IUC_SHORT_DATA_GRANT, "Short Data Grant"},
{IUC_LONG_DATA_GRANT, "Long Data Grant"},
{IUC_NULL_IE, "NULL IE"},
{IUC_DATA_ACK, "Data Ack"},
{IUC_ADV_PHY_SHORT_DATA_GRANT, "Advanced Phy Short Data Grant"},
{IUC_ADV_PHY_LONG_DATA_GRANT, "Advanced Phy Long Data Grant"},
{IUC_ADV_PHY_UGS, "Advanced Phy UGS"},
{IUC_RESERVED12, "Reserved"},
{IUC_RESERVED13, "Reserved"},
{IUC_RESERVED14, "Reserved"},
{IUC_EXPANSION, "Expanded IUC"},
{0, NULL}
};
static const value_string last_cw_len_vals[] = {
{1, "Fixed"},
{2, "Shortened"},
{0, NULL}
};
static const value_string ranging_req_vals[] = {
{0, "No ranging required"},
{1, "Unicast initial ranging required"},
{2, "Broadcast initial ranging required"},
{0, NULL}
};
/* Dissection */
static int
dissect_ucd (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data _U_)
{
int pos, tlvpos, endtlvpos;
guint32 length, tlvlen;
guint8 type, tlvtype;
proto_tree *ucd_tree, *tlv_tree, *burst_tree;
proto_item *ucd_item, *tlv_item, *tlv_len_item, *burst_item, *burst_len_item;
guint8 upchid, symrate;
upchid = tvb_get_guint8 (tvb, 0);
/* if the upstream Channel ID is 0 then this is for Telephony Return) */
if (upchid > 0)
col_add_fstr (pinfo->cinfo, COL_INFO,
"Type 2 UCD Message: Channel ID = %u (U%u)", upchid,
upchid - 1);
else
col_add_fstr (pinfo->cinfo, COL_INFO,
"Type 2 UCD Message: Channel ID = %u (Telephony Return)",
upchid);
ucd_item = proto_tree_add_item(tree, proto_docsis_ucd, tvb, 0, -1, ENC_NA);
ucd_tree = proto_item_add_subtree (ucd_item, ett_docsis_ucd);
proto_tree_add_item (ucd_tree, hf_docsis_ucd_upstream_chid, tvb, 0, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (ucd_tree, hf_docsis_ucd_config_ch_cnt, tvb, 1, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (ucd_tree, hf_docsis_ucd_mini_slot_size, tvb, 2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (ucd_tree, hf_docsis_ucd_down_chid, tvb, 3, 1, ENC_BIG_ENDIAN);
pos = 4;
while (tvb_reported_length_remaining(tvb, pos) > 0)
{
type = tvb_get_guint8 (tvb, pos);
tlv_tree = proto_tree_add_subtree(ucd_tree, tvb, pos, -1,
ett_docsis_tlv, &tlv_item,
val_to_str(type, channel_tlv_vals,
"Unknown TLV (%u)"));
proto_tree_add_uint (tlv_tree, hf_docsis_ucd_type, tvb, pos, 1, type);
pos++;
tlv_len_item = proto_tree_add_item_ret_uint (tlv_tree, hf_docsis_ucd_length, tvb, pos, 1, ENC_NA, &length);
pos++;
proto_item_set_len(tlv_item, length + 2);
switch (type)
{
case UCD_SYMBOL_RATE:
if (length == 1)
{
symrate = tvb_get_guint8 (tvb, pos);
proto_tree_add_uint (tlv_tree, hf_docsis_ucd_symbol_rate, tvb, pos, length, symrate * 160);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_FREQUENCY:
if (length == 4)
{
proto_tree_add_item (tlv_tree, hf_docsis_ucd_frequency, tvb, pos, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE:
proto_tree_add_item (tlv_tree, hf_docsis_ucd_preamble_pat, tvb, pos, length, ENC_NA);
break;
case UCD_EXT_PREAMBLE:
proto_tree_add_item (tlv_tree, hf_docsis_ucd_ext_preamble_pat, tvb, pos, length, ENC_NA);
break;
case UCD_SCDMA_MODE_ENABLED:
if (length == 1)
{
proto_tree_add_item (tlv_tree, hf_docsis_ucd_scdma_mode_enabled, tvb, pos, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_MAINTAIN_POWER_SPECTRAL_DENSITY:
if (length == 1)
{
proto_tree_add_item (tlv_tree, hf_docsis_ucd_maintain_power_spectral_density, tvb, pos, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_RANGING_REQUIRED:
if (length == 1)
{
proto_tree_add_item (tlv_tree, hf_docsis_ucd_ranging_required, tvb, pos, length, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_RANGING_HOLD_OFF_PRIORITY_FIELD:
if (length == 4)
{
static const int * ucd_rnghoff[] = {
&hf_docsis_ucd_rnghoff_cm,
&hf_docsis_ucd_rnghoff_erouter,
&hf_docsis_ucd_rnghoff_emta,
&hf_docsis_ucd_rnghoff_estb,
&hf_docsis_ucd_rnghoff_rsvd,
&hf_docsis_ucd_rnghoff_id_ext,
NULL
};
proto_tree_add_bitmask_list(tlv_tree, tvb, pos, length, ucd_rnghoff, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_RANGING_CHANNEL_CLASS_ID:
if (length == 4)
{
static const int * ucd_chan_class_id[] = {
&hf_docsis_ucd_chan_class_id_cm,
&hf_docsis_ucd_chan_class_id_erouter,
&hf_docsis_ucd_chan_class_id_emta,
&hf_docsis_ucd_chan_class_id_estb,
&hf_docsis_ucd_chan_class_id_rsvd,
&hf_docsis_ucd_chan_class_id_id_ext,
NULL
};
proto_tree_add_bitmask_list(tlv_tree, tvb, pos, length, ucd_chan_class_id, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, tlv_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_BURST_DESCR:
tlvpos = pos;
endtlvpos = tlvpos + length;
proto_tree_add_item (tlv_tree, hf_docsis_ucd_iuc, tvb, tlvpos++, 1, ENC_BIG_ENDIAN);
while (tlvpos < endtlvpos)
{
tlvtype = tvb_get_guint8 (tvb, tlvpos);
burst_tree = proto_tree_add_subtree (tlv_tree, tvb, tlvpos, -1,
ett_docsis_burst_tlv, &burst_item,
val_to_str(tlvtype, burst_tlv_vals,
"Unknown TLV (%u)"));
proto_tree_add_uint (burst_tree, hf_docsis_ucd_burst_type, tvb, tlvpos++, 1, tlvtype);
burst_len_item = proto_tree_add_item_ret_uint (burst_tree, hf_docsis_ucd_burst_length, tvb, tlvpos++, 1, ENC_NA, &tlvlen);
proto_item_set_len(burst_item, tlvlen + 2);
switch (tlvtype)
{
case UCD_MODULATION:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_mod_type, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_DIFF_ENCODING:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_diff_encoding, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE_LEN:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_preamble_len, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE_VAL_OFF:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_preamble_val_off, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_FEC:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_fec, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_FEC_CODEWORD:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_fec_codeword, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_SCRAMBLER_SEED:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_scrambler_seed, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_MAX_BURST:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_max_burst, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_GUARD_TIME:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_guard_time, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_LAST_CW_LEN:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_last_cw_len, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_SCRAMBLER_ONOFF:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_scrambler_onoff, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
} /* switch(tlvtype) */
tlvpos += tlvlen;
} /* while (tlvpos < endtlvpos) */
break;
case UCD_BURST_DESCR5:
/* DOCSIS 2.0 Upstream Channel Descriptor */
tlvpos = pos;
endtlvpos = tlvpos + length;
proto_tree_add_item (tlv_tree, hf_docsis_ucd_iuc, tvb, tlvpos++, 1, ENC_BIG_ENDIAN);
while (tlvpos < endtlvpos)
{
tlvtype = tvb_get_guint8 (tvb, tlvpos);
burst_tree = proto_tree_add_subtree (tlv_tree, tvb, tlvpos, -1,
ett_docsis_burst_tlv, &burst_item,
val_to_str(tlvtype, burst_tlv_vals,
"Unknown TLV (%u)"));
proto_tree_add_uint (burst_tree, hf_docsis_ucd_burst_type, tvb, tlvpos++, 1, tlvtype);
burst_len_item = proto_tree_add_item_ret_uint (burst_tree, hf_docsis_ucd_burst_length, tvb, tlvpos++, 1, ENC_NA, &tlvlen);
proto_item_set_len(burst_item, tlvlen + 2);
switch (tlvtype)
{
case UCD_MODULATION:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_mod_type, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_DIFF_ENCODING:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_diff_encoding, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE_LEN:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_preamble_len, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE_VAL_OFF:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_preamble_val_off, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_FEC:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_fec, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_FEC_CODEWORD:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_fec_codeword, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_SCRAMBLER_SEED:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_scrambler_seed, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_MAX_BURST:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_max_burst, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_GUARD_TIME:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_guard_time, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_LAST_CW_LEN:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_last_cw_len, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_SCRAMBLER_ONOFF:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_burst_scrambler_onoff, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_RS_INT_DEPTH:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_rs_int_depth, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_RS_INT_BLOCK:
if (tlvlen == 2)
{
proto_tree_add_item (burst_tree, hf_docsis_rs_int_block, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
case UCD_PREAMBLE_TYPE:
if (tlvlen == 1)
{
proto_tree_add_item (burst_tree, hf_docsis_preamble_type, tvb, tlvpos, tlvlen, ENC_BIG_ENDIAN);
}
else
{
expert_add_info_format(pinfo, burst_len_item, &ei_docsis_ucd_tlvlen_bad, "Wrong TLV length: %u", length);
}
break;
} /* switch(tlvtype) */
tlvpos += tlvlen;
} /* while (tlvpos < endtlvpos) */
break;
} /* switch(type) */
pos += length;
} /* tvb_reported_length_remaining(tvb, pos) > 0 */
return tvb_captured_length(tvb);
}
/* Register the protocol with Wireshark */
void
proto_register_docsis_ucd (void)
{
static hf_register_info hf[] = {
{&hf_docsis_ucd_upstream_chid,
{"Upstream Channel ID", "docsis_ucd.upchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_ucd_config_ch_cnt,
{"Config Change Count", "docsis_ucd.confcngcnt",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Configuration Change Count", HFILL}
},
{&hf_docsis_ucd_mini_slot_size,
{"Mini Slot Size (6.25us TimeTicks)", "docsis_ucd.mslotsize",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_ucd_down_chid,
{"Downstream Channel ID", "docsis_ucd.downchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Management Message", HFILL}
},
{&hf_docsis_ucd_type,
{"Type", "docsis_ucd.type",
FT_UINT8, BASE_DEC, VALS(channel_tlv_vals), 0x0,
"Channel TLV type", HFILL}
},
{&hf_docsis_ucd_length,
{"Length", "docsis_ucd.length",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Channel TLV length", HFILL}
},
{&hf_docsis_ucd_burst_type,
{"Type", "docsis_ucd.burst.tlvtype",
FT_UINT8, BASE_DEC, VALS(burst_tlv_vals), 0x0,
"Burst TLV type", HFILL}
},
{&hf_docsis_ucd_burst_length,
{"Length", "docsis_ucd.burst.tlvlen",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Burst TLV length", HFILL}
},
{&hf_docsis_ucd_symbol_rate,
{"Symbol Rate (ksym/sec)", "docsis_ucd.symrate",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Symbol Rate", HFILL}
},
{&hf_docsis_ucd_frequency,
{"Frequency (Hz)", "docsis_ucd.freq",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Upstream Center Frequency", HFILL}
},
{&hf_docsis_ucd_preamble_pat,
{"Preamble Pattern", "docsis_ucd.preamble",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Preamble Superstring", HFILL}
},
{&hf_docsis_ucd_ext_preamble_pat,
{"Extended Preamble Pattern", "docsis_ucd.extpreamble",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Extended Preamble Superstring", HFILL}
},
{&hf_docsis_ucd_scdma_mode_enabled,
{"S-CDMA Mode Enabled", "docsis_ucd.scdma",
FT_UINT8, BASE_DEC, VALS (on_off_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_ucd_maintain_power_spectral_density,
{"Maintain Power Spectral Density", "docsis_ucd.maintpower",
FT_UINT8, BASE_DEC, VALS (on_off_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_ucd_ranging_required,
{"Ranging Required", "docsis_ucd.rangingreq",
FT_UINT8, BASE_DEC, VALS (ranging_req_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_cm,
{"Ranging Hold-Off (CM)","docsis_ucd.rnghoffcm",
FT_BOOLEAN, 32, TFS(&tfs_allow_inhibit), 0x1,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_erouter,
{"Ranging Hold-Off (eRouter)",
"docsis_ucd.rnghofferouter",
FT_BOOLEAN, 32, TFS(&tfs_allow_inhibit), 0x2,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_emta,
{"Ranging Hold-Off (eMTA or EDVA)",
"docsis_ucd.rnghoffemta",
FT_BOOLEAN, 32, TFS(&tfs_allow_inhibit), 0x4,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_estb,
{"Ranging Hold-Off (DSG/eSTB)",
"docsis_ucd.rnghoffestb",
FT_BOOLEAN, 32, TFS(&tfs_allow_inhibit), 0x8,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_rsvd,
{"Reserved",
"docsis_ucd.rnghoffrsvd",
FT_UINT32, BASE_HEX, NULL, 0xFFF0,
NULL, HFILL}
},
{&hf_docsis_ucd_rnghoff_id_ext,
{"CM Ranging Class ID Extension",
"docsis_ucd.rngidext",
FT_UINT32, BASE_HEX, NULL, 0xFFFF0000,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_cm,
{"Channel Class ID (CM)","docsis_ucd.classidcm",
FT_UINT32, BASE_DEC, VALS (inhibit_allow_vals), 0x1,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_erouter,
{"Channel Class ID (eRouter)",
"docsis_ucd.classiderouter",
FT_UINT32, BASE_DEC, VALS (inhibit_allow_vals), 0x2,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_emta,
{"Channel Class ID (eMTA or EDVA)",
"docsis_ucd.classidemta",
FT_UINT32, BASE_DEC, VALS (inhibit_allow_vals), 0x4,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_estb,
{"Channel Class ID (DSG/eSTB)",
"docsis_ucd.classidestb",
FT_UINT32, BASE_DEC, VALS (inhibit_allow_vals), 0x8,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_rsvd,
{"Reserved",
"docsis_ucd.classidrsvd",
FT_UINT32, BASE_HEX, NULL, 0xFFF0,
NULL, HFILL}
},
{&hf_docsis_ucd_chan_class_id_id_ext,
{"CM Ranging Class ID Extension",
"docsis_ucd.classidext",
FT_UINT32, BASE_HEX, NULL, 0xFFFF0000,
NULL, HFILL}
},
{&hf_docsis_ucd_iuc,
{"Interval Usage Code", "docsis_ucd.iuc",
FT_UINT8, BASE_DEC, VALS (iuc_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_mod_type,
{"Modulation Type", "docsis_ucd.burst.modtype",
FT_UINT8, BASE_DEC, VALS (mod_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_diff_encoding,
{"Differential Encoding", "docsis_ucd.burst.diffenc",
FT_UINT8, BASE_DEC, VALS (on_off_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_preamble_len,
{"Preamble Length (Bits)", "docsis_ucd.burst.preamble_len",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_preamble_val_off,
{"Preamble Offset (Bits)", "docsis_ucd.burst.preamble_off",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_fec,
{"FEC (T)", "docsis_ucd.burst.fec",
FT_UINT8, BASE_DEC, NULL, 0x0,
"FEC (T) Codeword Parity Bits = 2^T", HFILL}
},
{&hf_docsis_burst_fec_codeword,
{"FEC Codeword Info bytes (k)", "docsis_ucd.burst.fec_codeword",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_scrambler_seed,
{"Scrambler Seed", "docsis_ucd.burst.scrambler_seed",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Burst Descriptor", HFILL}
},
{&hf_docsis_burst_max_burst,
{"Max Burst Size (Minislots)", "docsis_ucd.burst.maxburst",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_guard_time,
{"Guard Time Size (Symbol Times)", "docsis_ucd.burst.guardtime",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Guard Time Size", HFILL}
},
{&hf_docsis_burst_last_cw_len,
{"Last Codeword Length", "docsis_ucd.burst.last_cw_len",
FT_UINT8, BASE_DEC, VALS (last_cw_len_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_burst_scrambler_onoff,
{"Scrambler On/Off", "docsis_ucd.burst.scrambleronoff",
FT_UINT8, BASE_DEC, VALS (on_off_vals), 0x0,
NULL, HFILL}
},
{&hf_docsis_rs_int_depth,
{"RS Interleaver Depth", "docsis_ucd.burst.rsintdepth",
FT_UINT8, BASE_DEC, NULL, 0x0,
"R-S Interleaver Depth", HFILL}
},
{&hf_docsis_rs_int_block,
{"RS Interleaver Block Size", "docsis_ucd.burst.rsintblock",
FT_UINT8, BASE_DEC, NULL, 0x0,
"R-S Interleaver Block", HFILL}
},
{&hf_docsis_preamble_type,
{"Preamble Type", "docsis_ucd.burst.preambletype",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
};
static ei_register_info ei[] = {
{&ei_docsis_ucd_tlvlen_bad, {"docsis_ucd.tlvlenbad", PI_MALFORMED, PI_ERROR, "Bad TLV length", EXPFILL}},
};
static gint *ett[] = {
&ett_docsis_ucd,
&ett_docsis_tlv,
&ett_docsis_burst_tlv,
};
expert_module_t* expert_docsis_ucd;
proto_docsis_ucd =
proto_register_protocol ("DOCSIS Upstream Channel Descriptor", "DOCSIS UCD", "docsis_ucd");
proto_register_field_array (proto_docsis_ucd, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
expert_docsis_ucd = expert_register_protocol(proto_docsis_ucd);
expert_register_field_array(expert_docsis_ucd, ei, array_length(ei));
docsis_ucd_handle = register_dissector ("docsis_ucd", dissect_ucd, proto_docsis_ucd);
}
void
proto_reg_handoff_docsis_ucd (void)
{
dissector_add_uint ("docsis_mgmt", 0x02, docsis_ucd_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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