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wireshark/epan/dissectors/packet-oran.c

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/* packet-oran.c
* Routines for O-RAN fronthaul UC-plane dissection
* Copyright 2020, Jan Schiefer, Keysight Technologies, Inc.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* Dissector for the O-RAN Fronthaul CUS protocol specification.
* The current implementation is based on the
* ORAN-WG4.CUS.0-v01.00 specification, dated 2019/01/31.
*/
#include <config.h>
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/proto.h>
/* Prototypes */
void proto_reg_handoff_oran(void);
void proto_register_oran(void);
/* Initialize the protocol and registered fields */
static int proto_oran = -1;
static int hf_oran_cu_port_id = -1;
static int hf_oran_bandsector_id = -1;
static int hf_oran_cc_id = -1;
static int hf_oran_ru_port_id = -1;
static int hf_oran_sequence_id = -1;
static int hf_oran_e_bit = -1;
static int hf_oran_subsequence_id = -1;
static int hf_oran_data_direction = -1;
static int hf_oran_payload_version = -1;
static int hf_oran_filter_index = -1;
static int hf_oran_frame_id = -1;
static int hf_oran_subframe_id = -1;
static int hf_oran_slot_id = -1;
static int hf_oran_slot_within_frame = -1;
static int hf_oran_start_symbol_id = -1;
static int hf_oran_numberOfSections = -1;
static int hf_oran_sectionType = -1;
static int hf_oran_udCompHdrIqWidth = -1;
static int hf_oran_udCompHdrMeth = -1;
static int hf_oran_numberOfUEs = -1;
static int hf_oran_timeOffset = -1;
static int hf_oran_frameStructure_fft = -1;
static int hf_oran_frameStructure_subcarrier_spacing = -1;
/* static int hf_oran_frameStructure_u = -1; */
static int hf_oran_cpLength = -1;
static int hf_oran_section_id = -1;
static int hf_oran_rb = -1;
static int hf_oran_symInc = -1;
static int hf_oran_startPrbc = -1;
static int hf_oran_reMask = -1;
static int hf_oran_numPrbc = -1;
static int hf_oran_numSymbol = -1;
static int hf_oran_ef = -1;
static int hf_oran_beamId = -1;
static int hf_oran_extension = -1;
static int hf_oran_exttype = -1;
static int hf_oran_extlen = -1;
static int hf_oran_bfw = -1;
static int hf_oran_bfw_i = -1;
static int hf_oran_bfw_q = -1;
static int hf_oran_ueId = -1;
static int hf_oran_freqOffset = -1;
static int hf_oran_regularizationFactor = -1;
static int hf_oran_laaMsgType = -1;
static int hf_oran_laaMsgLen = -1;
static int hf_oran_lbtHandle = -1;
static int hf_oran_lbtDeferFactor = -1;
static int hf_oran_lbtBackoffCounter = -1;
static int hf_oran_lbtOffset = -1;
static int hf_oran_MCOT = -1;
static int hf_oran_txopSfnSfEnd = -1;
static int hf_oran_lbtMode = -1;
static int hf_oran_sfnSfEnd = -1;
static int hf_oran_lbtResult = -1;
static int hf_oran_lteTxopSymbols = -1;
static int hf_oran_initialPartialSF = -1;
static int hf_oran_reserved = -1;
/* static int hf_oran_bfwCompParam = -1; */
static int hf_oran_bfwCompHdr_iqWidth = -1;
static int hf_oran_bfwCompHdr_compMeth = -1;
static int hf_oran_num_bf_weights = -1;
static int hf_oran_symbolId = -1;
static int hf_oran_startPrbu = -1;
static int hf_oran_numPrbu = -1;
/* static int hf_oran_udCompParam = -1; */
static int hf_oran_iSample = -1;
static int hf_oran_qSample = -1;
static int hf_oran_blockScaler = -1;
static int hf_oran_compBitWidth = -1;
static int hf_oran_compShift = -1;
static int hf_oran_repetition = -1;
static int hf_oran_rbgSize = -1;
static int hf_oran_rbgMask = -1;
static int hf_oran_noncontig_priority = -1;
static int hf_oran_symbolMask = -1;
static int hf_oran_rsvd4 = -1;
static int hf_oran_rsvd8 = -1;
static int hf_oran_rsvd16 = -1;
static int hf_oran_exponent = -1;
static int hf_oran_iq_user_data = -1;
static int hf_oran_disable_bfws = -1;
static int hf_oran_rad = -1;
static int hf_oran_num_bund_prbs = -1;
static int hf_oran_beam_id = -1;
static int hf_oran_num_weights_per_bundle = -1;
static int hf_oran_off_start_prb_num_prb_pair = -1;
static int hf_oran_off_start_prb = -1;
static int hf_oran_num_prb = -1;
/* Computed fields */
static int hf_oran_c_eAxC_ID = -1;
static int hf_oran_refa = -1;
/* Initialize the subtree pointers */
static gint ett_oran = -1;
static gint ett_oran_ecpri_rtcid = -1;
static gint ett_oran_ecpri_pcid = -1;
static gint ett_oran_ecpri_seqid = -1;
static gint ett_oran_section = -1;
static gint ett_oran_section_type = -1;
static gint ett_oran_u_timing = -1;
static gint ett_oran_u_section = -1;
static gint ett_oran_u_prb = -1;
static gint ett_oran_iq = -1;
static gint ett_oran_c_section_extension = -1;
static gint ett_oran_bfw = -1;
static gint ett_oran_offset_start_prb_num_prb = -1;
/* Expert info */
static expert_field ei_oran_invalid_bfw_iqwidth = EI_INIT;
static expert_field ei_oran_invalid_num_bfw_weights = EI_INIT;
static expert_field ei_oran_unsupported_bfw_compression_method = EI_INIT;
static expert_field ei_oran_invalid_sample_bit_width = EI_INIT;
static expert_field ei_oran_reserved_numBundPrb = EI_INIT;
/* These are the message types handled by this dissector */
#define ECPRI_MT_IQ_DATA 0
#define ECPRI_MT_RT_CTRL_DATA 2
/* Preference settings. */
static guint pref_sample_bit_width_uplink = 14;
static guint pref_sample_bit_width_downlink = 14;
#define COMP_NONE 0
#define COMP_BLOCK_FP 1
#define COMP_BLOCK_SCALE 2
#define COMP_U_LAW 3
#define COMP_MODULATION 4
static gint pref_iqCompressionUplink = COMP_BLOCK_FP;
static gint pref_iqCompressionDownlink = COMP_BLOCK_FP;
static gboolean pref_includeUdCompHeaderUplink = FALSE;
static gboolean pref_includeUdCompHeaderDownlink = FALSE;
static guint pref_num_bf_weights = 1;
static guint pref_data_plane_section_total_rbs = 273;
static guint pref_num_weights_per_bundle = 32;
static const enum_val_t compression_options[] = {
{ "COMP_NONE", "No Compression", COMP_NONE },
{ "COMP_BLOCK_FP", "Block Floating Point Compression", COMP_BLOCK_FP },
{ "COMP_BLOCK_SCALE", "Block Scaling Compression", COMP_BLOCK_SCALE },
{ "COMP_U_LAW", "u-Law Compression", COMP_U_LAW },
{ "COMP_MODULATION", "Modulation Compression", COMP_MODULATION },
{ NULL, NULL, 0 }
};
static const value_string e_bit[] = {
{ 0, "More fragments follow" },
{ 1, "Last fragment" },
{ 0, NULL}
};
#define DIR_UPLINK 0
#define DIR_DOWNLINK 1
static const value_string data_direction_vals[] = {
{ DIR_UPLINK, "Uplink" },
{ DIR_DOWNLINK, "Downlink" },
{ 0, NULL}
};
static const value_string rb_vals[] = {
{ 0, "Every RB used" },
{ 1, "Every other RB used" },
{ 0, NULL}
};
static const value_string sym_inc_vals[] = {
{ 0, "Use the current symbol number" },
{ 1, "Increment the current symbol number" },
{ 0, NULL}
};
static const range_string filter_indices[] = {
{0, 0, "standard channel filter"},
{1, 1, "UL filter for PRACH preamble formats 0, 1, 2; min. passband 839 x 1.25kHz = 1048.75 kHz"},
{2, 2, "UL filter for PRACH preamble format 3, min. passband 839 x 5 kHz = 4195 kHz"},
{3, 3, "UL filter for PRACH preamble formats A1, A2, A3, B1, B2, B3, B4, C0, C2; min. passband 139 x \u0394fRA"},
{4, 4, "UL filter for NPRACH 0, 1; min. passband 48 x 3.75KHz = 180 KHz"},
{5, 15, "Reserved"},
{0, 0, NULL}
};
enum section_c_types {
SEC_C_UNUSED_RB = 0,
SEC_C_NORMAL = 1,
SEC_C_RSVD2 = 2,
SEC_C_PRACH = 3,
SEC_C_RSVD4 = 4,
SEC_C_UE_SCHED = 5,
SEC_C_CH_INFO = 6,
SEC_C_LAA = 7
};
static const range_string section_types[] = {
{SEC_C_UNUSED_RB, SEC_C_UNUSED_RB, "Unused Resource Blocks or symbols in Downlink or Uplink"},
{SEC_C_NORMAL, SEC_C_NORMAL, "Most DL/UL radio channels"},
{SEC_C_RSVD2, SEC_C_RSVD2, "Reserved for future use"},
{SEC_C_PRACH, SEC_C_PRACH, "PRACH and mixed-numerology channels"},
{SEC_C_RSVD4, SEC_C_RSVD4, "Reserved for future use"},
{SEC_C_UE_SCHED, SEC_C_UE_SCHED, "UE scheduling information(UE-ID assignment to section)"},
{SEC_C_CH_INFO, SEC_C_CH_INFO, "Channel information"},
{SEC_C_LAA, SEC_C_LAA, "LAA"},
{8, 255, "Reserved for future use"},
{0, 0, NULL} };
static const range_string section_types_short[] = {
{ SEC_C_UNUSED_RB, SEC_C_UNUSED_RB, "(Unused RBs)" },
{ SEC_C_NORMAL, SEC_C_NORMAL, "(Most channels)" },
{ SEC_C_RSVD2, SEC_C_RSVD2, "(reserved)" },
{ SEC_C_PRACH, SEC_C_PRACH, "(PRACH/mixed-\u03bc)" },
{ SEC_C_RSVD4, SEC_C_RSVD4, "(reserved)" },
{ SEC_C_UE_SCHED, SEC_C_UE_SCHED, "(UE scheduling info)" },
{ SEC_C_CH_INFO, SEC_C_CH_INFO, "(Channel info)" },
{ SEC_C_LAA, SEC_C_LAA, "(LAA)" },
{ 8, 255, "Reserved for future use" },
{ 0, 0, NULL }
};
static const range_string ud_comp_header_width[] = {
{0, 0, "I and Q are each 16 bits wide"},
{1, 15, "Bit width of I and Q"},
{0, 0, NULL} };
static const range_string ud_comp_header_meth[] = {
{0, 0, "No compression" },
{1, 1, "Block floating point compression" },
{2, 2, "Block scaling" },
{3, 3, "Mu - law" },
{4, 4, "Modulation compression" },
{5, 15, "Reserved"},
{0, 0, NULL}
};
static const range_string frame_structure_fft[] = {
{0, 0, "Reserved(no FFT / iFFT processing)"},
{1, 7, "Reserved"},
{8, 8, "FFT size 256"},
{9, 9, "FFT size 512"},
{10, 10, "FFT size 1024"},
{11, 11, "FFT size 2048"},
{12, 12, "FFT size 4096"},
{13, 13, "FFT size 1536"},
{14, 14, "FFT size 128"},
{15, 15, "Reserved"},
{0, 0, NULL}
};
static const range_string subcarrier_spacings[] = {
{ 0, 0, "SCS 15 kHz, 1 slot/subframe, slot length 1 ms" },
{ 1, 1, "SCS 30 kHz, 2 slots/subframe, slot length 500 \u03bcs" },
{ 2, 2, "SCS 60 kHz, 4 slots/subframe, slot length 250 \u03bcs" },
{ 3, 3, "SCS 120 kHz, 8 slots/subframe, slot length 125 \u03bcs" },
{ 4, 4, "SCS 240 kHz, 16 slots/subframe, slot length 62.5 \u03bcs" },
{ 5, 5, "SCS 480 kHz, 32 slots/subframe, slot length 31.25 \u03bcs" },
{ 6, 11, "Reserved" },
{ 12, 12, "SCS 1.25 kHz, 1 slot/subframe, slot length 1 ms" },
{ 13, 13, "SCS 3.75 kHz(LTE - specific), 1 slot/subframe, slot length 1 ms" },
{ 14, 14, "SCS 5 kHz, 1 slot/subframe, slot length 1 ms" },
{ 15, 15, "SCS 7.5 kHz(LTE - specific), 1 slot/subframe, slot length 1 ms" },
{ 0, 0, NULL }
};
static const range_string laaMsgTypes[] = {
{0, 0, "LBT_PDSCH_REQ - lls - CU to RU request to obtain a PDSCH channel"},
{1, 1, "LBT_DRS_REQ - lls - CU to RU request to obtain the channel and send DRS"},
{2, 2, "LBT_PDSCH_RSP - RU to lls - CU response, channel acq success or failure"},
{3, 3, "LBT_DRS_RSP - RU to lls - CU response, DRS sending success or failure"},
{4, 15, "reserved for future methods"},
{0, 0, NULL}
};
static const value_string exttype_vals[] = {
{0, "Reserved"},
{1, "Beamforming weights"},
{2, "Beamforming attributes"},
{3, "DL Precoding configuration parameters and indications"},
{4, "Modulation compr. params"},
{5, "Modulation compression additional scaling parameters"},
{6, "Non-contiguous PRB allocation"},
{7, "Multiple-eAxC designation"},
{8, "Regularization factor"},
{9, "Dynamic Spectrum Sharing parameters"},
{10, "Multiple ports grouping"},
{11, "Flexible BF weights"},
{12, "Non-Contiguous PRB Allocation with Frequency Ranges"},
{13, "PRB Allocation with Frequency Hopping"},
{14, "Nulling-layer Info. for ueId-based beamforming"},
{15, "Mixed-numerology Info. for ueId-based beamforming"},
{16, "Section description for antenna mapping in UE channel information based UL beamforming"},
{17, "Section description for indication of user port group"},
{18, "Section description for Uplink Transmission Management"},
{0, NULL}
};
static const value_string bfw_comp_headers_iq_width[] = {
{0, "I and Q are 16 bits wide"},
{1, "I and Q are 1 bit wide"},
{2, "I and Q are 2 bits wide"},
{3, "I and Q are 3 bits wide"},
{4, "I and Q are 4 bits wide"},
{5, "I and Q are 5 bits wide"},
{6, "I and Q are 6 bits wide"},
{7, "I and Q are 7 bits wide"},
{8, "I and Q are 8 bits wide"},
{9, "I and Q are 9 bits wide"},
{10, "I and Q are 10 bits wide"},
{11, "I and Q are 11 bits wide"},
{12, "I and Q are 12 bits wide"},
{13, "I and Q are 13 bits wide"},
{14, "I and Q are 14 bits wide"},
{15, "I and Q are 15 bits wide"},
{0, NULL}
};
static const value_string bfw_comp_headers_comp_meth[] = {
{0, "no compression"},
{1, "block floating point"},
{2, "block scaling"},
{3, "u-law"},
{4, "beamspace compression"},
{0, NULL}
};
/* 5.4.7.6.1 */
static const value_string rbg_size_vals[] = {
{0, "reserved"},
{1, "1"},
{2, "2"},
{3, "3"},
{4, "4"},
{5, "6"},
{6, "8"},
{7, "16"},
{0, NULL}
};
/* 5.4.7.6.4 */
static const value_string priority_vals[] = {
{0, "0"},
{1, "+1"},
{2, "-2 (reserved, should not be used)"},
{3, "-1"},
{0, NULL}
};
#if 0
static const range_string bfw_comp_parms[] = {
{0, 0, NULL}
};
static const range_string udCompParams[] = {
{0, 0, NULL}
};
#endif
static void write_pdu_label_and_info(proto_item *ti1, proto_item *ti2,
packet_info *pinfo, const char *format, ...) G_GNUC_PRINTF(4, 5);
/* Write the given formatted text to:
- the info column (if pinfo != NULL)
- 1 or 2 other labels (optional)
*/
static void write_pdu_label_and_info(proto_item *ti1, proto_item *ti2,
packet_info *pinfo, const char *format, ...)
{
#define MAX_INFO_BUFFER 256
char info_buffer[MAX_INFO_BUFFER];
va_list ap;
if ((ti1 == NULL) && (ti2 == NULL) && (pinfo == NULL)) {
return;
}
va_start(ap, format);
g_vsnprintf(info_buffer, MAX_INFO_BUFFER, format, ap);
va_end(ap);
/* Add to indicated places */
if (pinfo != NULL) {
col_append_str(pinfo->cinfo, COL_INFO, info_buffer);
}
if (ti1 != NULL) {
proto_item_append_text(ti1, "%s", info_buffer);
}
if (ti2 != NULL) {
proto_item_append_text(ti2, "%s", info_buffer);
}
}
static void
write_section_info(proto_item *section_heading, packet_info *pinfo, proto_item *protocol_item, guint32 section_id, guint32 start_prbx, guint32 num_prbx)
{
switch (num_prbx) {
case 0:
write_pdu_label_and_info(section_heading, protocol_item, pinfo, ", Id: %d (all PRBs)", section_id);
break;
case 1:
write_pdu_label_and_info(section_heading, protocol_item, pinfo, ", Id: %d (PRB: %d)", section_id, start_prbx);
break;
default:
write_pdu_label_and_info(section_heading, protocol_item, pinfo, ", Id: %d (PRB: %d-%d)", section_id, start_prbx, start_prbx + num_prbx - 1);
}
}
static void
addPcOrRtcid(tvbuff_t *tvb, proto_tree *tree, gint *offset, const char *name)
{
proto_item *item;
proto_tree *oran_pcid_tree = proto_tree_add_subtree(tree, tvb, *offset, 2, ett_oran_ecpri_pcid, &item, name);
guint32 cuPortId, aCellId, ccId, ruPortId = 0;
gint id_offset = *offset;
proto_tree_add_item_ret_uint(oran_pcid_tree, hf_oran_cu_port_id, tvb, *offset, 1, ENC_NA, &cuPortId);
proto_tree_add_item_ret_uint(oran_pcid_tree, hf_oran_bandsector_id, tvb, *offset, 1, ENC_NA, &aCellId);
*offset += 1;
proto_tree_add_item_ret_uint(oran_pcid_tree, hf_oran_cc_id, tvb, *offset, 1, ENC_NA, &ccId);
proto_tree_add_item_ret_uint(oran_pcid_tree, hf_oran_ru_port_id, tvb, *offset, 1, ENC_NA, &ruPortId);
*offset += 1;
proto_item_append_text(item, " (CU_Port_ID: %d, A_Cell_ID: %d, CC_ID: %d, RU_Port_ID: %d)", cuPortId, aCellId, ccId, ruPortId);
char id[16];
g_snprintf(id, 16, "%1x:%2.2x:%1x:%1x", cuPortId, aCellId, ccId, ruPortId);
proto_item *pi = proto_tree_add_string(oran_pcid_tree, hf_oran_c_eAxC_ID, tvb, id_offset, 2, id);
proto_item_set_generated(pi);
}
static void
addSeqid(tvbuff_t *tvb, proto_tree *oran_tree, gint *offset)
{
proto_item *seqIdItem;
proto_tree *oran_seqid_tree = proto_tree_add_subtree(oran_tree, tvb, *offset, 2, ett_oran_ecpri_seqid, &seqIdItem, "ecpriSeqid");
guint32 seqId, subSeqId, e = 0;
proto_tree_add_item_ret_uint(oran_seqid_tree, hf_oran_sequence_id, tvb, *offset, 1, ENC_NA, &seqId);
*offset += 1;
proto_tree_add_item_ret_uint(oran_seqid_tree, hf_oran_e_bit, tvb, *offset, 1, ENC_NA, &e);
proto_tree_add_item_ret_uint(oran_seqid_tree, hf_oran_subsequence_id, tvb, *offset, 1, ENC_NA, &subSeqId);
*offset += 1;
proto_item_append_text(seqIdItem, ", SeqId: %d, SubSeqId: %d, E: %d", seqId, subSeqId, e);
}
/* Special case for uncompressed/16-bit value */
static float uncompressed_to_float(guint32 h)
{
gint16 i16 = h & 0x0000ffff;
return ((float)i16) / 0x7fff;
}
static int dissect_bfwCompHdr(tvbuff_t *tvb, proto_tree *tree, gint offset,
guint32 *iq_width, guint32 *comp_meth, proto_item **comp_meth_ti)
{
proto_tree_add_item_ret_uint(tree, hf_oran_bfwCompHdr_iqWidth,
tvb, offset, 1, ENC_BIG_ENDIAN, iq_width);
*comp_meth_ti = proto_tree_add_item_ret_uint(tree, hf_oran_bfwCompHdr_compMeth,
tvb, offset, 1, ENC_BIG_ENDIAN, comp_meth);
offset++;
return offset;
}
/* Fields present (if any) depend upon passed-in bfwCompMeth */
static int dissect_bfwCompParam(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint offset,
proto_item *ti, guint32 bfwcomphdr_comp_method,
guint32 *exponent, gboolean *supported)
{
*supported = FALSE;
switch (bfwcomphdr_comp_method) {
case COMP_NONE:
/* In this case, bfwCompParam is absent */
*supported = TRUE;
break;
case COMP_BLOCK_FP:
/* 4 reserved bits + exponent */
proto_tree_add_item_ret_uint(tree, hf_oran_exponent,
tvb, offset, 1, ENC_BIG_ENDIAN, exponent);
*supported = TRUE;
offset++;
break;
case COMP_BLOCK_SCALE:
proto_tree_add_item(tree, hf_oran_blockScaler,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
break;
case COMP_U_LAW:
/* compBitWidth, compShift */
proto_tree_add_item(tree, hf_oran_compBitWidth,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_oran_compShift,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
break;
case COMP_MODULATION: /* beamspace */
/* TODO: activeBeamspaceCoefficientMask - ceil(K/8) octets */
/* proto_tree_add_item(extension_tree, hf_oran_blockScaler,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset++; */
break;
default:
/* Not handled */
break;
}
/* Can't go on if compression scheme not supported */
if (!*supported) {
expert_add_info_format(pinfo, ti, &ei_oran_unsupported_bfw_compression_method,
"BFW Compression method %u (%s) not supported by dissector",
bfwcomphdr_comp_method,
val_to_str_const(bfwcomphdr_comp_method, bfw_comp_headers_comp_meth, "Unknown"));
}
return offset;
}
static gfloat decompress_value(guint32 bits, guint32 comp_method, guint8 iq_width _U_, guint32 exponent)
{
switch (comp_method) {
case COMP_NONE: /* no compression */
return uncompressed_to_float(bits);
case COMP_BLOCK_FP: /* block floating point */
{
/* A.1.2 Block Floating Point Decompression Algorithm */
gint32 cPRB = bits;
guint32 scaler = 2 << (exponent-1); /* i.e. 2^exponent */
/* Check last bit, in case we need to flip to -ve */
if (cPRB >= (1<<(iq_width-1))) {
cPRB -= (1<<iq_width);
}
const guint8 mantissa_bits = iq_width-1;
return (cPRB / (gfloat)(1 << (15+mantissa_bits))) * scaler;
}
case COMP_BLOCK_SCALE:
case COMP_U_LAW:
case COMP_MODULATION:
default:
/* Not supported! */
return 0.0;
}
}
#define ORPHAN_BUNDLE_NUMBER 999
static guint32 dissect_bfw_bundle(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint offset,
proto_item *comp_meth_ti, guint32 bfwcomphdr_comp_meth,
guint8 iq_width,
guint bundle_number, guint first_prb, guint last_prb)
{
/* bfwCompParam */
gboolean compression_method_supported = FALSE;
guint32 exponent = 0;
offset = dissect_bfwCompParam(tvb, tree, pinfo, offset, comp_meth_ti,
bfwcomphdr_comp_meth, &exponent, &compression_method_supported);
/* Can't show details of unsupported compression method */
if (!compression_method_supported) {
/* Don't know how to show, so give up */
return 0;
}
/* Create Bundle subtree */
gint bit_offset = offset*8;
gint bfw_offset = bit_offset / 8;
gint prb_offset = offset;
/* Set bundle name */
char bundle_name[32];
if (bundle_number != ORPHAN_BUNDLE_NUMBER) {
g_snprintf(bundle_name, 32, "Bundle %u", bundle_number);
}
else {
g_strlcpy(bundle_name, "Orphaned", 32);
}
proto_item *bundle_ti = proto_tree_add_string_format(tree, hf_oran_bfw,
tvb, bfw_offset, 0, "",
"%s: (PRBs %u-%u)",
bundle_name,
first_prb, last_prb);
proto_tree *bundle_tree = proto_item_add_subtree(bundle_ti, ett_oran_bfw);
/* beamId */
guint32 beam_id;
proto_tree_add_item_ret_uint(bundle_tree, hf_oran_beam_id, tvb, offset, 2, ENC_BIG_ENDIAN, &beam_id);
proto_item_append_text(bundle_ti, " (beamId:%u) ", beam_id);
bit_offset += 16;
/* Number of weights per bundle (from preference) */
proto_item *wpb_ti = proto_tree_add_uint(bundle_tree, hf_oran_num_weights_per_bundle, tvb, 0, 0,
pref_num_weights_per_bundle);
proto_item_set_generated(wpb_ti);
/* Add the weights for this bundle */
for (guint m=0; m < pref_num_weights_per_bundle; m++) {
/* Create subtree */
bfw_offset = bit_offset / 8;
proto_item *bfw_ti = proto_tree_add_string_format(bundle_tree, hf_oran_bfw,
tvb, bfw_offset, 4 /* assuming 1*16-bit samples */,
"", "TRX %u: (", m);
proto_tree *bfw_tree = proto_item_add_subtree(bfw_ti, ett_oran_bfw);
/* I */
/* Get bits, and convert to float. */
guint32 bits = tvb_get_bits(tvb, bit_offset, iq_width, ENC_BIG_ENDIAN);
gfloat value = decompress_value(bits, bfwcomphdr_comp_meth, iq_width, exponent);
/* Add to tree. */
proto_tree_add_float_format_value(bfw_tree, hf_oran_bfw_i, tvb, bit_offset/8, (iq_width+7)/8, value, "#%u=%f", m, value);
bit_offset += iq_width;
proto_item_append_text(bfw_ti, "I%u=%f ", m, value);
/* Q */
/* Get bits, and convert to float. */
bits = tvb_get_bits(tvb, bit_offset, iq_width, ENC_BIG_ENDIAN);
value = decompress_value(bits, bfwcomphdr_comp_meth, iq_width, exponent);
/* Add to tree. */
proto_tree_add_float_format_value(bfw_tree, hf_oran_bfw_q, tvb, bit_offset/8, (iq_width+7)/8, value, "#%u=%f", m, value);
bit_offset += iq_width;
proto_item_append_text(bfw_ti, "Q%u=%f)", m, value);
}
proto_item_set_len(bundle_ti, bit_offset/8 - prb_offset);
return bit_offset/8;
}
static int dissect_oran_c_section(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 sectionType, proto_item *protocol_item)
{
guint offset = 0;
proto_tree *oran_tree = NULL;
proto_item *sectionHeading = NULL;
oran_tree = proto_tree_add_subtree(tree, tvb, offset, 8, ett_oran_section, &sectionHeading, "Section");
guint32 sectionId = 0;
gboolean extension_flag = FALSE;
/* sectionID */
proto_tree_add_item_ret_uint(oran_tree, hf_oran_section_id, tvb, offset, 2, ENC_BIG_ENDIAN, &sectionId);
offset++;
/* rb */
proto_tree_add_item(oran_tree, hf_oran_rb, tvb, offset, 1, ENC_NA);
/* symInc */
proto_tree_add_item(oran_tree, hf_oran_symInc, tvb, offset, 1, ENC_NA);
/* startPrbc */
guint32 startPrbc;
proto_tree_add_item_ret_uint(oran_tree, hf_oran_startPrbc, tvb, offset, 2, ENC_BIG_ENDIAN, &startPrbc);
offset += 2;
/* numPrbc */
guint32 numPrbc;
proto_tree_add_item_ret_uint(oran_tree, hf_oran_numPrbc, tvb, offset, 1, ENC_NA, &numPrbc);
offset += 1;
/* reMask */
proto_tree_add_item(oran_tree, hf_oran_reMask, tvb, offset, 2, ENC_BIG_ENDIAN);
offset++;
/* numSymbol */
guint32 numSymbol;
proto_tree_add_item_ret_uint(oran_tree, hf_oran_numSymbol, tvb, offset, 1, ENC_NA, &numSymbol);
offset++;
/* ef (extension flag) */
switch (sectionType) {
case SEC_C_NORMAL: /* Section Type "1" */
case SEC_C_PRACH: /* Section Type "3" */
case SEC_C_UE_SCHED: /* Section Type "5" */
proto_tree_add_item_ret_boolean(oran_tree, hf_oran_ef, tvb, offset, 1, ENC_BIG_ENDIAN, &extension_flag);
break;
default:
break;
}
write_section_info(sectionHeading, pinfo, protocol_item, sectionId, startPrbc, numPrbc);
proto_item_append_text(sectionHeading, ", Symbols: %d", numSymbol);
if (numPrbc == 0) {
/* Special case for all PRBs */
numPrbc = pref_data_plane_section_total_rbs;
startPrbc = 0; /* may already be 0... */
}
guint32 beamId = 0;
/* TODO: check formats for remaining sectionType values - they look different, and some fields above might not be present.. */
/* Section type specific fields (after 'numSymbol') */
switch (sectionType) {
case SEC_C_UNUSED_RB: /* Section Type "0" - Table 5.4 */
/* reserved */
proto_tree_add_item(oran_tree, hf_oran_rsvd16, tvb, offset, 2, ENC_NA);
offset += 2;
break;
case SEC_C_NORMAL: /* Section Type "1" - Table 5.5 */
/* beamId */
proto_tree_add_item_ret_uint(oran_tree, hf_oran_beamId, tvb, offset, 2, ENC_BIG_ENDIAN, &beamId);
offset += 2;
proto_item_append_text(sectionHeading, ", BeamId: %d", beamId);
break;
case SEC_C_PRACH: /* Section Type "3" - Table 5.6 */
{
/* beamId */
proto_tree_add_item_ret_uint(oran_tree, hf_oran_beamId, tvb, offset, 2, ENC_BIG_ENDIAN, &beamId);
offset += 2;
/* freqOffset */
gint32 freqOffset; /* Yes, this is signed, so the implicit cast is intentional. */
proto_item *freq_offset_item = proto_tree_add_item_ret_uint(oran_tree, hf_oran_freqOffset, tvb, offset, 3, ENC_BIG_ENDIAN, &freqOffset);
freqOffset |= 0xff000000; /* Must sign-extend */
proto_item_set_text(freq_offset_item, "Frequency offset: %d \u0394f", freqOffset);
offset += 3;
/* reserved */
proto_tree_add_item(oran_tree, hf_oran_rsvd8, tvb, offset, 1, ENC_NA);
offset += 1;
proto_item_append_text(sectionHeading, ", BeamId: %d, FreqOffset: %d \u0394f", beamId, freqOffset);
break;
}
case SEC_C_UE_SCHED: /* Section Type "5" - Table 5.7 */
/* ueId */
proto_tree_add_item(oran_tree, hf_oran_ueId, tvb, offset, 2, ENC_NA);
offset += 2;
break;
default:
break;
};
/* Section extension commands */
while (extension_flag) {
gint extension_start_offset = offset;
/* Create subtree for each extension (with summary) */
proto_item *extension_ti = proto_tree_add_string_format(oran_tree, hf_oran_extension,
tvb, offset, 0, "", "Extension");
proto_tree *extension_tree = proto_item_add_subtree(extension_ti, ett_oran_c_section_extension);
/* ef (i.e. another extension after this one?) */
proto_tree_add_item_ret_boolean(extension_tree, hf_oran_ef, tvb, offset, 1, ENC_BIG_ENDIAN, &extension_flag);
/* extType */
guint32 exttype;
proto_tree_add_item_ret_uint(extension_tree, hf_oran_exttype, tvb, offset, 1, ENC_BIG_ENDIAN, &exttype);
offset++;
proto_item_append_text(extension_ti, " (%s)", val_to_str_const(exttype, exttype_vals, "Unknown"));
/* extLen (number of 32-bit words).
TODO: expert_info for value 0, which is reserved!
*/
guint32 extlen_len = (exttype==11) ? 2 : 1; /* Extension 11 is special */
guint32 extlen;
proto_item *extlen_ti = proto_tree_add_item_ret_uint(extension_tree, hf_oran_extlen, tvb,
offset, extlen_len, ENC_BIG_ENDIAN, &extlen);
proto_item_append_text(extlen_ti, " (%u bytes)", extlen*4);
offset += extlen_len;
switch (exttype) {
case 1: /* Beamforming Weights Extension type */
{
guint32 bfwcomphdr_iq_width, bfwcomphdr_comp_meth;
proto_item *comp_meth_ti = NULL;
/* bfwCompHdr (2 subheaders - bfwIqWidth and bfwCompMeth)*/
offset = dissect_bfwCompHdr(tvb, extension_tree, offset,
&bfwcomphdr_iq_width, &bfwcomphdr_comp_meth, &comp_meth_ti);
/* Look up width of samples. */
guint8 iq_width = !bfwcomphdr_iq_width ? 16 : bfwcomphdr_iq_width;
/* Show num_bf_weights (from preference) as a generated field */
proto_item *num_bf_weights_ti = proto_tree_add_uint(extension_tree, hf_oran_num_bf_weights, tvb, 0, 0, pref_num_bf_weights);
proto_item_set_generated(num_bf_weights_ti);
/* Pref setting must be valid */
if (pref_num_bf_weights == 0) {
expert_add_info_format(pinfo, num_bf_weights_ti, &ei_oran_invalid_num_bfw_weights,
"Number of BF weights (from preference) must not be 0!");
break;
}
/* bfwCompParam */
guint32 exponent = 0;
gboolean compression_method_supported = FALSE;
offset = dissect_bfwCompParam(tvb, extension_tree, pinfo, offset, comp_meth_ti,
bfwcomphdr_comp_meth, &exponent, &compression_method_supported);
/* Can't show details of unsupported compression method */
if (!compression_method_supported) {
break;
}
/* We know:
- iq_width (above)
- numBfWeights (taken from preference)
- remaining bytes in extension
We can therefore derive TRX (number of antennas).
*/
/* I & Q samples
Don't know how many there will be, so just fill available bytes...
*/
guint weights_bytes = (extlen*4)-3;
guint num_weights_pairs = (weights_bytes*8) / (iq_width*2);
guint num_trx = num_weights_pairs / pref_num_bf_weights;
gint bit_offset = offset*8;
for (guint n=0; n < num_trx; n++) {
/* Create subtree */
gint bfw_offset = bit_offset / 8;
proto_item *bfw_ti = proto_tree_add_string_format(extension_tree, hf_oran_bfw,
tvb, bfw_offset, 0, "", "TRX %u: (", n);
proto_tree *bfw_tree = proto_item_add_subtree(bfw_ti, ett_oran_bfw);
/* TODO: it is not clear if:
- pref_num_bf_weights can be > 1 (in which case, no need for pref):
- if above, should I,Q be interlaced rather than separate loops as below?
*/
/* I values */
for (guint m=0; m < pref_num_bf_weights; m++) {
/* Get bits, and convert to float. */
guint32 bits = tvb_get_bits(tvb, bit_offset, iq_width, ENC_BIG_ENDIAN);
gfloat value = uncompressed_to_float(bits);
/* Add to tree. */
proto_tree_add_float_format_value(bfw_tree, hf_oran_bfw_i, tvb, bit_offset/8, (iq_width+7)/8, value, "#%u=%f", m, value);
bit_offset += iq_width;
proto_item_append_text(bfw_ti, "I%u=%f ", m, value);
}
/* Leave a gap between I and Q values */
proto_item_append_text(bfw_ti, " ");
/* Q values */
for (guint m=0; m < pref_num_bf_weights; m++) {
/* Get bits, and convert to float. */
guint32 bits = tvb_get_bits(tvb, bit_offset, iq_width, ENC_BIG_ENDIAN);
gfloat value = uncompressed_to_float(bits);
/* Add to tree. */
proto_tree_add_float_format_value(bfw_tree, hf_oran_bfw_q, tvb, bit_offset/8, (iq_width+7)/8, value, "#%u=%f", m, value);
bit_offset += iq_width;
proto_item_append_text(bfw_ti, "Q%u=%f ", m, value);
}
proto_item_append_text(bfw_ti, ")");
proto_item_set_len(bfw_ti, (bit_offset+7)/8 - bfw_offset);
}
/* pad */
break;
}
case 6: /* Non-contiguous PRB allocation in time and frequency domain */
proto_tree_add_item(extension_tree, hf_oran_repetition, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(extension_tree, hf_oran_rbgSize, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(extension_tree, hf_oran_rbgMask, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(extension_tree, hf_oran_noncontig_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(extension_tree, hf_oran_symbolMask, tvb, offset, 2, ENC_BIG_ENDIAN);
/* offset += 2; */
break;
case 11: /* Flexible Weights Extension Type */
{
gboolean disableBFWs;
guint32 numBundPrb;
/* disableBFWs */
proto_tree_add_item_ret_boolean(extension_tree, hf_oran_disable_bfws,
tvb, offset, 1, ENC_BIG_ENDIAN, &disableBFWs);
if (disableBFWs) {
proto_item_append_text(extension_ti, " (disableBFWs)");
}
/* RAD */
proto_tree_add_item(extension_tree, hf_oran_rad,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* 6 reserved bits */
offset++;
/* numBundPrb */
proto_item *num_bund_prb_ti = proto_tree_add_item_ret_uint(extension_tree, hf_oran_num_bund_prbs,
tvb, offset, 1, ENC_BIG_ENDIAN, &numBundPrb);
offset++;
/* value zero is reserved.. */
if (numBundPrb == 0) {
expert_add_info_format(pinfo, num_bund_prb_ti, &ei_oran_reserved_numBundPrb,
"Reserved value of numBundPrb seen - not valid for use");
}
guint32 num_bundles;
guint32 orphaned_prbs;
if (!disableBFWs) {
/********************************************/
/* Table 5-36 */
/********************************************/
guint32 bfwcomphdr_iq_width, bfwcomphdr_comp_meth;
proto_item *comp_meth_ti = NULL;
/* bfwCompHdr (2 subheaders - bfwIqWidth and bfwCompMeth)*/
offset = dissect_bfwCompHdr(tvb, extension_tree, offset,
&bfwcomphdr_iq_width, &bfwcomphdr_comp_meth, &comp_meth_ti);
/* Look up width of samples. */
guint8 iq_width = !bfwcomphdr_iq_width ? 16 : bfwcomphdr_iq_width;
/* Work out number of bundles, but take care not to divide by zero. */
if (numBundPrb == 0) {
break;
}
num_bundles = numPrbc / numBundPrb;
/* Add (complete) bundles */
for (guint b=0; b < num_bundles; b++) {
offset = dissect_bfw_bundle(tvb, extension_tree, pinfo, offset,
comp_meth_ti, bfwcomphdr_comp_meth,
iq_width,
b,
startPrbc + b*numBundPrb,
startPrbc + (b+1)*numBundPrb - 1);
if (!offset) {
break;
}
}
/* Any remaining BFWs will be added into an 'orphan bundle'. */
orphaned_prbs = numPrbc % numBundPrb;
if (orphaned_prbs) {
offset = dissect_bfw_bundle(tvb, extension_tree, pinfo, offset,
comp_meth_ti, bfwcomphdr_comp_meth,
iq_width, ORPHAN_BUNDLE_NUMBER,
startPrbc + num_bundles*numBundPrb,
startPrbc + num_bundles*numBundPrb + orphaned_prbs-1);
}
}
else {
/********************************************/
/* Table 5.37 */
/* No weights in this case */
/********************************************/
/* Work out number of bundles, but take care not to divide by zero. */
if (numBundPrb == 0) {
break;
}
num_bundles = numPrbc / numBundPrb;
for (guint n=0; n < num_bundles; n++) {
/* beamId */
proto_item *ti = proto_tree_add_item(extension_tree, hf_oran_beam_id,
tvb, offset, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " (Bundle %u)", n);
offset += 2;
}
/* Any remaining BFWs would be added into an 'orphan bundle', so beamId would be here. */
orphaned_prbs = numPrbc % numBundPrb;
if (orphaned_prbs) {
proto_item *ti = proto_tree_add_item(extension_tree, hf_oran_beam_id,
tvb, offset, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " (Orphaned PRBs)");
}
}
/* Add summary to extension root */
if (orphaned_prbs) {
proto_item_append_text(extension_ti, " (%u bundles + orphaned)", num_bundles);
}
else {
proto_item_append_text(extension_ti, " (%u bundles)", num_bundles);
}
}
break;
case 12: /* Non-Contiguous PRB Allocation with Frequency Ranges */
{
/* priority */
proto_tree_add_item(extension_tree, hf_oran_noncontig_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
/* symbolMask */
proto_tree_add_item(extension_tree, hf_oran_symbolMask, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* There are now 'R' pairs of (offStartPrb, numPrb) values. Not sure where R comes from,
but for now assume that entire space in extLen should be filled with pairs.
N.B. this suggests that 'R' would always be an even number.. */
guint32 extlen_remaining_byte = (extlen*4) - 4;
guint8 prb_index;
for (prb_index = 1; extlen_remaining_byte > 0; prb_index++)
{
/* Create a subtree for each pair */
proto_item *pair_ti = proto_tree_add_string(extension_tree, hf_oran_off_start_prb_num_prb_pair,
tvb, offset, 2, "");
proto_tree *pair_tree = proto_item_add_subtree(pair_ti, ett_oran_offset_start_prb_num_prb);
/* offStartPrb */
guint32 off_start_prb; // = tvb_get_guint8(tvb, offset);
proto_tree_add_item_ret_uint(pair_tree, hf_oran_off_start_prb, tvb, offset, 1, ENC_BIG_ENDIAN, &off_start_prb);
offset++;
/* numPrb */
guint32 num_prb; // = tvb_get_guint8(tvb, offset);
proto_tree_add_item_ret_uint(pair_tree, hf_oran_num_prb, tvb, offset, 1, ENC_BIG_ENDIAN, &num_prb);
offset++;
/* Add summary to pair root item */
proto_item_append_text(pair_ti, "(%u) offStartPrb=%3u, numPrb=%u",
prb_index, off_start_prb, num_prb);
extlen_remaining_byte -= 2;
}
break;
}
default:
/* TODO: Support remaining extension types. */
break;
}
/* Move offset to beyond signalled length of extension */
offset = extension_start_offset + (extlen*4);
/* Set length of extension header. */
proto_item_set_len(extension_ti, extlen*4);
}
/* Set extent of overall section */
proto_item_set_len(sectionHeading, offset);
proto_item_append_text(sectionHeading, ")");
return offset;
}
/* Control plane dissector. */
static int dissect_oran_c(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
/* Set up structures needed to add the protocol subtree and manage it */
guint offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "O-RAN-FH-C");
col_set_str(pinfo->cinfo, COL_INFO, "C-Plane");
/* Create display subtree for the protocol */
proto_item *protocol_item = proto_tree_add_item(tree, proto_oran, tvb, 0, -1, ENC_NA);
proto_item_append_text(protocol_item, "-C");
proto_tree *oran_tree = proto_item_add_subtree(protocol_item, ett_oran);
addPcOrRtcid(tvb, oran_tree, &offset, "ecpriRtcid");
addSeqid(tvb, oran_tree, &offset);
proto_item *sectionHeading;
/* section subtree */
gint section_tree_offset = offset;
proto_tree *section_tree = proto_tree_add_subtree(oran_tree, tvb, offset, 2, ett_oran_section_type, &sectionHeading, "C-Plane Section Type ");
/* dataDirection */
guint32 direction = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_data_direction, tvb, offset, 1, ENC_NA, &direction);
/* payloadVersion */
proto_tree_add_item(section_tree, hf_oran_payload_version, tvb, offset, 1, ENC_NA);
/* payloadVersion */
proto_tree_add_item(section_tree, hf_oran_filter_index, tvb, offset, 1, ENC_NA);
offset += 1;
guint ref_a_offset = 0;
/* frameId */
guint32 frameId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_frame_id, tvb, offset, 1, ENC_NA, &frameId);
offset += 1;
/* subframeId */
guint32 subframeId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_subframe_id, tvb, offset, 1, ENC_NA, &subframeId);
/* slotId */
guint32 slotId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_slot_id, tvb, offset, 2, ENC_BIG_ENDIAN, &slotId);
offset++;
/* startSymbolId */
guint32 startSymbolId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_start_symbol_id, tvb, offset, 1, ENC_NA, &startSymbolId);
offset++;
char id[16];
g_snprintf(id, 16, "%d-%d-%d", frameId, subframeId, slotId);
proto_item *pi = proto_tree_add_string(section_tree, hf_oran_refa, tvb, ref_a_offset, 3, id);
proto_item_set_generated(pi);
/* numberOfSections */
guint32 nSections = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_numberOfSections, tvb, offset, 1, ENC_NA, &nSections);
offset += 1;
/* sectionType */
guint32 sectionType = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_sectionType, tvb, offset, 1, ENC_NA, &sectionType);
offset += 1;
proto_item *iq_width_item = NULL;
guint bit_width = 0;
guint32 scs, slots_per_subframe;
proto_item *ti;
switch (sectionType) {
case SEC_C_UNUSED_RB: /* Section Type "0" */
proto_tree_add_item(section_tree, hf_oran_timeOffset, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(section_tree, hf_oran_frameStructure_fft, tvb, offset, 1, ENC_NA);
proto_tree_add_item_ret_uint(section_tree, hf_oran_frameStructure_subcarrier_spacing, tvb, offset, 1, ENC_NA, &scs);
/* slots_per_subframe = 1 << scs; */
offset += 1;
proto_tree_add_item(section_tree, hf_oran_cpLength, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(section_tree, hf_oran_rsvd8, tvb, offset, 1, ENC_NA);
offset += 1;
break;
case SEC_C_NORMAL: /* Section Type "1" */
iq_width_item = proto_tree_add_item_ret_uint(section_tree, hf_oran_udCompHdrIqWidth , tvb, offset, 1, ENC_NA, &bit_width);
proto_item_append_text(iq_width_item, " (%d bits)", bit_width == 0 ? 16 : bit_width);
proto_tree_add_item(section_tree, hf_oran_udCompHdrMeth, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(section_tree, hf_oran_rsvd8, tvb, offset, 1, ENC_NA);
offset += 1;
break;
case SEC_C_PRACH: /* Section Type "3" */
proto_tree_add_item(section_tree, hf_oran_timeOffset, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(section_tree, hf_oran_frameStructure_fft, tvb, offset, 1, ENC_NA);
proto_tree_add_item_ret_uint(section_tree, hf_oran_frameStructure_subcarrier_spacing, tvb, offset, 1, ENC_NA, &scs);
slots_per_subframe = 1 << scs;
ti = proto_tree_add_uint(section_tree, hf_oran_slot_within_frame, tvb, 0, 0, (slots_per_subframe*subframeId) + slotId);
proto_item_set_generated(ti);
offset += 1;
proto_tree_add_item(section_tree, hf_oran_cpLength, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
iq_width_item = proto_tree_add_item_ret_uint(section_tree, hf_oran_udCompHdrIqWidth, tvb, offset, 1, ENC_NA, &bit_width);
proto_item_append_text(iq_width_item, " (%d bits)", bit_width + 1);
proto_tree_add_item(section_tree, hf_oran_udCompHdrMeth, tvb, offset, 1, ENC_NA);
offset += 1;
break;
/* TODO: other section types */
default:
break;
};
/* Set actual length of section. */
proto_item_set_len(section_tree, offset - section_tree_offset);
proto_item_append_text(sectionHeading, "%d, %s, Frame: %d, Subframe: %d, Slot: %d, StartSymbol: %d",
sectionType, val_to_str(direction, data_direction_vals, "Unknown"),
frameId, subframeId, slotId, startSymbolId);
write_pdu_label_and_info(protocol_item, NULL, pinfo, ", Type: %d %s", sectionType, rval_to_str(sectionType, section_types_short, "Unknown"));
/* Dissect each C section */
for (guint32 i = 0; i < nSections; ++i) {
tvbuff_t *section_tvb = tvb_new_subset_length_caplen(tvb, offset, -1, -1);
offset += dissect_oran_c_section(section_tvb, oran_tree, pinfo, sectionType, protocol_item);
}
return tvb_captured_length(tvb);
}
/* User plane dissector */
static int
dissect_oran_u(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
/* Set up structures needed to add the protocol subtree and manage it */
gint offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "O-RAN-FH-U");
col_set_str(pinfo->cinfo, COL_INFO, "U-Plane");
/* create display subtree for the protocol */
proto_item *protocol_item = proto_tree_add_item(tree, proto_oran, tvb, 0, -1, ENC_NA);
proto_item_append_text(protocol_item, "-U");
proto_tree *oran_tree = proto_item_add_subtree(protocol_item, ett_oran);
addPcOrRtcid(tvb, oran_tree, &offset, "ecpriPcid");
addSeqid(tvb, oran_tree, &offset);
proto_item *timingHeader;
proto_tree *timing_header_tree = proto_tree_add_subtree(oran_tree, tvb, offset, 4, ett_oran_u_timing, &timingHeader, "Timing header");
guint32 direction;
proto_tree_add_item_ret_uint(timing_header_tree, hf_oran_data_direction, tvb, offset, 1, ENC_NA, &direction);
proto_tree_add_item(timing_header_tree, hf_oran_payload_version, tvb, offset, 1, ENC_NA);
proto_tree_add_item(timing_header_tree, hf_oran_filter_index, tvb, offset, 1, ENC_NA);
offset += 1;
gint ref_a_offset = offset;
guint32 frameId = 0;
proto_tree_add_item_ret_uint(timing_header_tree, hf_oran_frame_id, tvb, offset, 1, ENC_NA, &frameId);
offset += 1;
guint32 subframeId = 0;
proto_tree_add_item_ret_uint(timing_header_tree, hf_oran_subframe_id, tvb, offset, 1, ENC_NA, &subframeId);
guint32 slotId = 0;
proto_tree_add_item_ret_uint(timing_header_tree, hf_oran_slot_id, tvb, offset, 2, ENC_BIG_ENDIAN, &slotId);
guint32 startSymbolId = 0;
offset++;
proto_tree_add_item_ret_uint(timing_header_tree, hf_oran_start_symbol_id, tvb, offset, 1, ENC_NA, &startSymbolId);
offset++;
char id[16];
g_snprintf(id, 16, "%d-%d-%d", frameId, subframeId, slotId);
proto_item *pi = proto_tree_add_string(timing_header_tree, hf_oran_refa, tvb, ref_a_offset, 3, id);
proto_item_set_generated(pi);
proto_item_append_text(timingHeader, " %s, Frame: %d, Subframe: %d, Slot: %d, StartSymbol: %d",
val_to_str(direction, data_direction_vals, "Unknown"), frameId, subframeId, slotId, startSymbolId);
guint sample_bit_width;
gint compression;
gboolean includeUdCompHeader;
if (direction == DIR_UPLINK) {
sample_bit_width = pref_sample_bit_width_uplink;
compression = pref_iqCompressionUplink;
includeUdCompHeader = pref_includeUdCompHeaderUplink;
} else {
sample_bit_width = pref_sample_bit_width_downlink;
compression = pref_iqCompressionDownlink;
includeUdCompHeader = pref_includeUdCompHeaderDownlink;
}
/* Need a valid value (e.g. 9, 14). 0 definitely won't work, as won't progress around loop! */
if (sample_bit_width == 0) {
expert_add_info_format(pinfo, protocol_item, &ei_oran_invalid_sample_bit_width,
"%cL Sample bit width from preference (%u) not valid, so can't decode sections",
(direction == DIR_UPLINK) ? 'U' : 'D', sample_bit_width);
return offset;
}
guint nBytesForSamples = (sample_bit_width * 12 * 2) / 8;
guint nBytesPerPrb = nBytesForSamples;
if (compression != COMP_NONE)
nBytesPerPrb++; /* 1 extra byte reserved/exponent */
guint bytesLeft;
guint number_of_sections = 0;
do {
proto_item *sectionHeading;
proto_tree *section_tree = proto_tree_add_subtree(oran_tree, tvb, offset, 2, ett_oran_u_section, &sectionHeading, "Section");
/* sectionId */
guint32 sectionId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_section_id, tvb, offset, 2, ENC_BIG_ENDIAN, &sectionId);
offset++;
/* rb */
proto_tree_add_item(section_tree, hf_oran_rb, tvb, offset, 1, ENC_NA);
/* symInc */
proto_tree_add_item(section_tree, hf_oran_symInc, tvb, offset, 1, ENC_NA);
/* startPrbu */
guint32 startPrbu = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_startPrbu, tvb, offset, 2, ENC_BIG_ENDIAN, &startPrbu);
offset += 2;
/* numPrbu */
guint32 numPrbu = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_numPrbu, tvb, offset, 1, ENC_NA, &numPrbu);
offset += 1;
if (includeUdCompHeader) {
/* TODO: extract these values to inform how wide IQ samples in each PRB will be? */
proto_tree_add_item(section_tree, hf_oran_udCompHdrMeth, tvb, offset, 1, ENC_NA);
proto_tree_add_item(section_tree, hf_oran_udCompHdrIqWidth, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(section_tree, hf_oran_rsvd8, tvb, offset, 1, ENC_NA);
offset += 1;
}
write_section_info(sectionHeading, pinfo, protocol_item, sectionId, startPrbu, numPrbu);
if (numPrbu == 0) {
/* Special case for all PRBs */
numPrbu = pref_data_plane_section_total_rbs;
startPrbu = 0; /* may already be 0... */
}
for (guint i = 0; i < numPrbu; ++i) {
proto_item *prbHeading;
proto_tree *rb_tree = proto_tree_add_subtree(section_tree, tvb, offset, nBytesPerPrb, ett_oran_u_prb, &prbHeading, "PRB");
if (compression != COMP_NONE) {
proto_tree_add_item(rb_tree, hf_oran_rsvd4, tvb, offset, 1, ENC_NA);
proto_tree_add_item(rb_tree, hf_oran_exponent, tvb, offset, 1, ENC_NA);
offset += 1;
}
/* FIXME - add udCompParam for COMP_NONE or COMP_MODULATION, figure out correct length
Maybe even decode the samples themselves.
*/
proto_tree_add_item(rb_tree, hf_oran_iq_user_data, tvb, offset, nBytesForSamples, ENC_NA);
offset += nBytesForSamples;
proto_item_set_len(sectionHeading, nBytesPerPrb * numPrbu + 4); /* 4 bytes for section header */
proto_item_append_text(prbHeading, " %d", startPrbu + i);
}
bytesLeft = tvb_captured_length(tvb) - offset;
number_of_sections++;
} while (bytesLeft >= (4 + nBytesPerPrb)); /* FIXME: bad heuristic */
proto_item *ti = proto_tree_add_uint(oran_tree, hf_oran_numberOfSections, tvb, 0, 0, number_of_sections);
proto_item_set_generated(ti);
return tvb_captured_length(tvb);
}
/*****************************/
/* Main dissection function. */
static int
dissect_oran(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
guint32 ecpri_message_type = *(guint32 *)data;
switch (ecpri_message_type) {
case ECPRI_MT_IQ_DATA:
return dissect_oran_u(tvb, pinfo, tree, data);
case ECPRI_MT_RT_CTRL_DATA:
return dissect_oran_c(tvb, pinfo, tree, data);
default:
/* Not dissecting other types - assume these are handled by eCPRI dissector */
return 0;
}
}
/* Register the protocol with Wireshark. */
void
proto_register_oran(void)
{
static hf_register_info hf[] = {
/* Section 3.1.3.1.6 */
{ &hf_oran_cu_port_id,
{ "DU Port ID", "oran_fh_cus.du_port_id",
FT_UINT8, BASE_DEC,
NULL, 0xc0,
NULL, HFILL }
},
/* Section 3.1.3.1.6 */
{ &hf_oran_bandsector_id,
{ "BandSector ID", "oran_fh_cus.bandsector_id",
FT_UINT8, BASE_DEC,
NULL, 0x3f,
NULL, HFILL }
},
/* Section 3.1.3.1.6 */
{ &hf_oran_cc_id,
{ "CC ID", "oran_fh_cus.cc_id",
FT_UINT8, BASE_DEC,
NULL, 0xf0,
NULL, HFILL }
},
/* Section 3.1.3.1.6 */
{ &hf_oran_ru_port_id,
{ "RU Port ID", "oran_fh_cus.ru_port_id",
FT_UINT8, BASE_DEC,
NULL, 0x0f,
NULL, HFILL }
},
/* Section 3.1.3.1.7 */
{ &hf_oran_sequence_id,
{ "Sequence ID", "oran_fh_cus.sequence_id",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"The Sequence ID wraps around individually per c_eAxC",
HFILL }
},
/* Section 3.1.3.1.7 */
{ &hf_oran_e_bit,
{ "E Bit", "oran_fh_cus.e_bit",
FT_UINT8, BASE_DEC,
VALS(e_bit), 0x80,
"One bit (the \"E-bit\") is reserved to indicate the last message of a subsequence.",
HFILL }
},
/* Section 3.1.3.1.7 */
{ &hf_oran_subsequence_id,
{ "Subsequence ID", "oran_fh_cus.subsequence_id",
FT_UINT8, BASE_DEC,
NULL, 0x7f,
"The subsequence identifier.",
HFILL }
},
/* Section 5.4.4.1 */
{ &hf_oran_data_direction,
{ "Data Direction", "oran_fh_cus.data_direction",
FT_UINT8, BASE_DEC,
VALS(data_direction_vals), 0x80,
"This parameter indicates the gNB data direction.",
HFILL }
},
/* Section 5.4.4.2 */
{ &hf_oran_payload_version,
{"Payload Version", "oran_fh_cus.payloadVersion",
FT_UINT8, BASE_DEC,
NULL, 0x70,
"This parameter defines the payload protocol version valid for the "
"following IEs in the application layer. In this version of the "
"specification payloadVersion=001b shall be used.",
HFILL}
},
/* Section 5.4.4.3 */
{&hf_oran_filter_index,
{"Filter Index", "oran_fh_cus.filterIndex",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(filter_indices), 0x0f,
"This parameter defines an index to the channel filter to be used "
"between IQ data and air interface, both in DL and UL. For most "
"physical channels filterIndex =0000b is used which indexes the "
"standard channel filter, e.g. 100MHz channel filter for 100MHz "
"nominal carrier bandwidth. Another use case is PRACH in UL, where "
"different filter indices can be used for different PRACH formats, "
"assuming that before FFT processing of PRACH data there is a "
"separate PRACH filter or PRACH filter in addition to the standard "
"channel filter in UL. Please note that for PRACH there is typically "
"also a frequency offset (see freqOffset) applied before the "
"PRACH filter. NOTE: Filter index is commanded from lls-CU to RU. "
"Likewise, it is not mandatory to command special filters, and "
"filter index = 0000b is also allowed for PRACH.",
HFILL}
},
/* Section 5.4.4.4 */
{&hf_oran_frame_id,
{"Frame ID", "oran_fh_cus.frameId",
FT_UINT8, BASE_DEC,
NULL, 0x00,
"This parameter is a counter for 10 ms frames (wrapping period 2.56 seconds)",
HFILL}
},
/* Section 5.4.4.5 */
{&hf_oran_subframe_id,
{"Subframe ID", "oran_fh_cus.subframe_id",
FT_UINT8, BASE_DEC,
NULL, 0xf0,
"This parameter is a counter for 1 ms sub-frames within 10ms frame.",
HFILL}
},
/* Section 5.4.4.6 */
{&hf_oran_slot_id,
{"Slot ID", "oran_fh_cus.slotId",
FT_UINT16, BASE_DEC,
NULL, 0x0fc0,
"This parameter is the slot number within a 1ms sub-frame. All slots "
"in one sub-frame are counted by this parameter, slotId running "
"from 0 to Nslot-1. In this version of the specification the "
"maximum Nslot=16, All other values of the 6 bits are reserved for "
"future use.",
HFILL}
},
/* Section 5.4.4.6 */
{&hf_oran_slot_within_frame,
{"Slot within frame", "oran_fh_cus.slot-within-frame",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"Slot within frame, to match DT logs",
HFILL}
},
/* Section 5.4.4.7 */
{&hf_oran_start_symbol_id,
{"Start Symbol ID", "oran_fh_cus.startSymbolId",
FT_UINT8, BASE_DEC,
NULL, 0x3f,
"This parameter identifies the first symbol number within slot, to "
"which the information of this message is applies.",
HFILL}
},
/* Section 5.4.4.8 */
{&hf_oran_numberOfSections,
{"Number of Sections", "oran_fh_cus.numberOfSections",
FT_UINT8, BASE_DEC,
NULL, 0x00,
"This parameter indicates the number of section IDs included in "
"this C-Plane message.",
HFILL}
},
/* Section 5.4.4.9 */
{&hf_oran_sectionType,
{"Section Type", "oran_fh_cus.sectionType",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(section_types), 0x00,
"This parameter determines the characteristics of U-plane data to "
"be transferred or received from a beam with one pattern id.",
HFILL}
},
/* Section 5.4.4.11 */
{&hf_oran_numberOfUEs,
{"Number Of UEs", "oran_fh_cus.numberOfUEs",
FT_UINT8, BASE_DEC,
NULL, 0x00,
"This parameter applies to section type 6 messages and indicates "
"the number of UEs (for which channel information is provided) are "
"included in the message. This allows the parser to determine "
"when the last UE's data has been parsed.",
HFILL}
},
/* Section 5.4.4.12 */
{&hf_oran_timeOffset,
{"Time Offset", "oran_fh_cus.timeOffset",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"This parameter defines the time_offset from the start of the slot "
"to the start of the Cyclic Prefix (CP) in number of samples tsample "
"(=1/30.72MHz as specified in 3GPP TS38.211 section 4.1). "
"Because this is denominated in \"samples\" there is no fixed "
"microsecond unit for this parameter; time_offset = \"n\" may be longer "
"or shorter in time depending on the sampling interval (which is "
"a NR capability only, not applicable to LTE). time_offset = time"
"Offset * tsample",
HFILL}
},
/* Section 5.4.4.13 */
{ &hf_oran_frameStructure_fft,
{ "FFT Size", "oran_fh_cus.frameStructure.fft",
FT_UINT8, BASE_HEX | BASE_RANGE_STRING,
RVALS(frame_structure_fft), 0xf0,
"The FFT/iFFT size being used for all IQ data processing related "
"to this message.",
HFILL }
},
/* Section 5.4.4.13 */
{ &hf_oran_frameStructure_subcarrier_spacing,
{ "Subcarrier Spacing", "oran_fh_cus.frameStructure.spacing",
FT_UINT8, BASE_HEX | BASE_RANGE_STRING,
RVALS(subcarrier_spacings), 0x0f,
"The sub carrier spacing "
"as well as the number of slots per 1ms sub-frame according "
"to 3GPP TS 38.211, taking for completeness also 3GPP TS 36.211 "
"into account. The parameter \u03bc=0...5 from 3GPP TS 38.211 is "
"extended to apply for PRACH processing.",
HFILL }
},
/* Section 5.4.4.14 */
{&hf_oran_cpLength,
{"CP Length", "oran_fh_cus.cpLength",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"This parameter defines the length CP_length of the Cyclic Prefix "
"(CP) as follows, based on Ts (=1/30.72MHz as specified in 3GPP "
"TS38.211 section 4.1) and \u03bc as defined inTable 16. (\"NA\" for \u03bc "
"shall be replaced by \"0\" in the following:) CP_length = cpLength "
"* Ts * 2-\u03bc",
HFILL}
},
/* Section 5.4.5.1 */
{&hf_oran_section_id,
{"Section ID", "oran_fh_cus.sectionId",
FT_UINT16, BASE_DEC,
NULL, 0xfff0,
"This parameter identifies individual sections within the C-Plane "
"message. The purpose of section ID is mapping of U-Plane messages "
"to the corresponding C-Plane message (and Section Type) associated "
"with the data. Two C-Plane sections with same Section ID "
"may be combined and mapped to a common section in a corresponding "
"U-Plane message containing a combined payload for both sections "
"(e.g., for supporting mixed CSI RS and PDSCH). This case is "
"applicable when usage of reMask is complimentary (or orthogonal) "
"and different beam directions (i.e. beamIds) are given the resource "
"elements. NOTE: In case of two sections with same Section ID "
"are combined, both sections shall have same rb, startPrbc, numPrbc "
"and numSymbol IE fields' content.",
HFILL}
},
/* Section 5.4.5.2 */
{&hf_oran_rb,
{"RB Indicator", "oran_fh_cus.rb",
FT_UINT8, BASE_DEC,
VALS(rb_vals), 0x08,
"This parameter is used to indicate if every RB is used or every "
"other RB is used. The starting RB is defined by startPrbc and "
"total number of used RBs is defined by numPrbc. Example: RB=1, "
"startPrb=1, numPrb=3, then the PRBs used are 1, 3, and 5.",
HFILL}
},
/* Section 5.4.5.3 */
{&hf_oran_symInc,
{"Symbol Number Increment Command", "oran_fh_cus.symInc",
FT_UINT8, BASE_DEC,
VALS(sym_inc_vals), 0x04,
"This parameter is used to indicate which symbol number is relevant "
"to the given sectionId. It is expected that for each C-Plane "
"message a symbol number is maintained and starts with the value "
"of startSymbolid. The same value is used for each section in "
"the message as long as symInc is zero. When symInc is one, the "
"maintained symbol number should be incremented by one, and that "
"new symbol number should be used for that section and each subsequent "
"section until the symInc bit is again detected to be one. "
"In this manner, multiple symbols may be handled by a single C-Plane "
"message.",
HFILL}
},
/* Section 5.4.5.4 */
{&hf_oran_startPrbc,
{"Starting PRB of Control Plane Section", "oran_fh_cus.startPrbc",
FT_UINT16, BASE_DEC,
NULL, 0x03ff,
"This parameter is the starting PRB of a control section. For one "
"C-Plane message, there may be multiple U-Plane messages associated "
"with it and requiring defining from which PRB the control "
"commands are applicable.",
HFILL}
},
/* Section 5.4.5.5 */
{&hf_oran_reMask,
{"RE Mask", "oran_fh_cus.reMask",
FT_UINT16, BASE_HEX,
NULL, 0xfff0,
"This parameter defines the Resource Element (RE) mask within a "
"PRB. Each bit setting in the reMask indicates if the section control "
"is applicable to the RE sent in U-Plane messages (0=not applicable; "
"1=applicable).",
HFILL}
},
/* Section 5.4.5.6 */
{&hf_oran_numPrbc,
{"Number of Contiguous PRBs per Control Section", "oran_fh_cus.numPrbc",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"This parameter defines the PRBs where the control section is valid.",
HFILL}
},
/* Section 5.4.5.7 */
{&hf_oran_numSymbol,
{"Number of Symbols", "oran_fh_cus.numSymbol",
FT_UINT8, BASE_DEC,
NULL, 0x0f,
"This parameter defines number of symbols to which the section "
"control is applicable. At minimum, the section control shall be "
"applicable to at least one symbol. However, possible optimizations "
"could allow for several (up to 14) symbols, if e.g., all 14 "
"symbols use the same beam ID.",
HFILL}
},
/* Section 5.4.5.8 */
{&hf_oran_ef,
{"Extension Flag", "oran_fh_cus.ef",
FT_BOOLEAN, 8,
NULL, 0x80,
"This parameter is used to indicate if this section will contain "
"both beamforming index and any ex(tension information (ef=1) or "
"just a beamforming index (ewf=0)",
HFILL}
},
/* Section 5.4.5.9 */
{&hf_oran_beamId,
{"Beam ID", "oran_fh_cus.beamId",
FT_UINT16, BASE_DEC,
NULL, 0x7fff,
"This parameter defines the beam pattern to be applied to the U-Plane "
"data. beamId = 0 means no beamforming operation will be "
"performed. Note that the beamId encodes the beamforming to be done "
"on the RU. This beamforming may be digital, analog or both "
"(\"hybrid beamforming\") and the beamId provides all the information "
"necessary for the RU to select the correct beam (or weight table "
"from which to create a beam). The specific mapping of beamId "
"to e.g. weight table, directionality, beam adjacency or any other "
"beam attributes is specific to the RU design and must be conveyed "
"via M-Plane from the RU to lls-CU upon startup.",
HFILL}
},
/* Section 5.4.6.2 */
{&hf_oran_extension,
{"Extension", "oran_fh_cus.extension",
FT_STRING, BASE_NONE,
NULL, 0x0,
"Section extension",
HFILL}
},
/* Section 5.4.6.1 */
{&hf_oran_exttype,
{"extType", "oran_fh_cus.extType",
FT_UINT8, BASE_DEC,
VALS(exttype_vals), 0x7f,
"The extension which which provides additional parameters specific to subject data extension",
HFILL}
},
/* Section 5.4.6.3 */
{&hf_oran_extlen,
{"extLen", "oran_fh_cus.extLen",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"Extension length in 32-bit words",
HFILL}
},
/* Section 5.4.7.1 */
{&hf_oran_bfw,
{"bfw", "oran_fh_cus.bfw",
FT_STRING, BASE_NONE,
NULL, 0x0,
"Set of weights for a particular antenna",
HFILL}
},
/* Section 5.4.7.1.3 */
{&hf_oran_bfw_i,
{"bfwI", "oran_fh_cus.bfwI",
FT_FLOAT, BASE_NONE,
NULL, 0x0,
"This parameter is the In-phase beamforming weight value. The total "
"number of weights in the section is RU-specific and is conveyed "
"from the RU to the lls-CU as part of the initialization procedure "
"via the M-Plane.",
HFILL}
},
/* Section 5.4.7.1.4 */
{&hf_oran_bfw_q,
{"bfwQ", "oran_fh_cus.bfwQ",
FT_FLOAT, BASE_NONE,
NULL, 0x0,
"This parameter is the Quadrature beamforming weight value. The "
"total number of weights in the section is RU-specific and is "
"conveyed from the RU to the lls-CU as part of the initialization "
"procedure via the M-Plane.",
HFILL}
},
/* Section 5.4.5.10 */
{&hf_oran_ueId,
{"UE ID", "oran_fh_cus.ueId",
FT_UINT16, BASE_HEX,
NULL, 0x0,
"This parameter provides a label for the UE for which the section "
"contents apply. This is used to support channel information "
"sending from the lls-CU to the RU. This is just a label and the "
"specific value has no meaning regarding types of UEs that may be "
"supported within the system.",
HFILL}
},
/* Section 5.4.5.11 */
{&hf_oran_freqOffset,
{"Frequency Offset", "oran_fh_cus.freqOffset",
FT_UINT24, BASE_DEC,
NULL, 0x0,
"This parameter defines the frequency offset with respect to the "
"carrier center frequency before additional filtering (e.g. for "
"PRACH) and FFT processing (in UL) in steps of subcarrier spacings"
" ?f. The frequency offset shall be individual per control section. "
"frequency_offset = freqOffset * ?f Note: It may be studied "
"whether this IEs should be individual per control section to allow "
"scheduling of several simultaneous PRACH opportunities with "
"different individual frequency offsets",
HFILL}
},
/* Section 5.4.5.12 */
{&hf_oran_regularizationFactor,
{"Regularization Factor", "oran_fh_cus.regularizationFactor",
FT_INT16, BASE_DEC,
NULL, 0x0,
"This parameter provides a signed value to support MMSE operation "
"within the RU when beamforming weights are supported in the RU, "
"so related to section type 6.",
HFILL}
},
/* Section 5.4.5.14 */
{&hf_oran_laaMsgType,
{"LAA Message Type", "oran_fh_cus.laaMsgType",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(laaMsgTypes), 0xf0,
"This parameter defines number of symbols to which the section "
"control is applicable. At minimum, the section control shall be "
"applicable to at least one symbol. However, possible optimizations "
"could allow for several (up to 14) symbols, if e.g., all 14 "
"symbols use the same beam ID.",
HFILL}
},
/* Section 5.4.5.15 */
{&hf_oran_laaMsgLen,
{"LAA Message Length", "oran_fh_cus.laaMsgLen",
FT_UINT8, BASE_DEC,
NULL, 0x0f,
"This parameter defines number of 32-bit words in the LAA section, "
"where \"0\" means one 32-bit word, \"1\" means 2 32-bit words, etc. "
"- including the byte containing the lssMsgLen parameter.",
HFILL}
},
/* Section 5.4.5.16 */
{&hf_oran_lbtHandle,
{"LBT Handle", "oran_fh_cus.lbtHandle",
FT_UINT16, BASE_HEX,
NULL, 0x0,
"This parameter provides a label that is included in the configuration "
"request message (e.g., LBT_PDSCH_REQ, LBT_DRS_REQ) transmitted "
"from the lls-CU to the RU and returned in the corresponding "
"response message (e.g., LBT_PDSCH_RSP, LBT_DRS_RSP).",
HFILL}
},
/* Section 5.4.5.17 */
{&hf_oran_lbtDeferFactor,
{"Defer Factor", "oran_fh_cus.lbtDeferFactor",
FT_UINT8, BASE_DEC,
NULL, 0x1c,
"Defer factor in sensing slots as described in 3GPP TS 36.213 "
"Section 15.1.1. This parameter is used for LBT CAT 4 and can take "
"one of three values: {1,3, 7} based on the priority class. Four "
"priority classes are defined in 3GPP TS 36.213.",
HFILL}
},
/* Section 5.4.5.18 */
{&hf_oran_lbtBackoffCounter,
{"Backoff Counter", "oran_fh_cus.lbtBackoffCounter",
FT_UINT16, BASE_DEC,
NULL, 0x03ff,
"LBT backoff counter in sensing slots as described in 3GPP TS 36.213 "
"Section 15.1.1. This parameter is used for LBT CAT 4 and can "
"take one of nine values: {3, 7, 15, 31, 63, 127, 255, 511, 1023} "
"based on the priority class. Four priority classes are defined "
"in 3GPP TS 36.213.",
HFILL}
},
/* Section 5.4.5.19 */
{&hf_oran_lbtOffset,
{"LBT Offset", "oran_fh_cus.lbtOffset",
FT_UINT16, BASE_DEC,
NULL, 0xff80,
"LBT start time in microseconds from the beginning of the subframe "
"scheduled by this message",
HFILL}
},
/* Section 5.4.5.20 */
{&hf_oran_MCOT,
{"Maximum Channel Occupancy Time", "oran_fh_cus.MCOT",
FT_UINT8, BASE_DEC,
NULL, 0xf0,
"LTE TXOP duration in subframes as described in 3GPP TS 36.213 "
"Section 15.1.1. The maximum values for this parameter are {2, 3, 8, "
"10} based on the priority class. Four priority classes are "
"defined in 3GPP TS 36.213.",
HFILL}
},
/* Section 5.4.5.21 */
{&hf_oran_txopSfnSfEnd,
{"TXOP SFN/SF End", "oran_fh_cus.txopSfnSfEnd",
FT_UINT16, BASE_DEC,
NULL, 0x0fff,
"SFN/SF by which the TXOP must end",
HFILL}
},
/* Section 5.4.5.22 */
{&hf_oran_lbtMode,
{"LBT Mode", "oran_fh_cus.lbtMode",
FT_UINT8, BASE_DEC,
NULL, 0x20,
"Part of multi-carrier support. Indicates whether full LBT process "
"is carried or partial LBT process is carried (multi carrier mode "
"B according to 3GPP TS 36.213 Section 15.1.5.2). 0 - full LBT "
"(regular LBT). 1 - Partial LBT (looking back 25usec prior to "
"transmission as indicated in 3GPP TS 36.213 section 15.1.5.2)",
HFILL}
},
/* Section 5.4.5.23 */
{&hf_oran_sfnSfEnd,
{"SFN/SF End", "oran_fh_cus.sfnSfEnd",
FT_UINT16, BASE_DEC,
NULL, 0x0fff,
"SFN/SF by which the DRS window must end",
HFILL}
},
/* Section 5.4.5.24 */
{&hf_oran_lbtResult,
{"LBT Result", "oran_fh_cus.lbtResult",
FT_UINT8, BASE_DEC,
NULL, 0x80,
"LBT result of SFN/SF. 0 - SUCCESS - indicates that the channel was "
"successfully acquired. 1 - FAILURE - indicates failure to "
"acquire the channel by the end of SFN/SF",
HFILL}
},
/* Section 5.4.5.25 */
{&hf_oran_lteTxopSymbols,
{"LTE TXOP Symbols", "oran_fh_cus.lteTxopSymbols",
FT_UINT16, BASE_DEC,
NULL, 0x3fff,
"Actual LTE TXOP in symbols. Valid when LBT result = SUCCESS.",
HFILL}
},
/* Section 5.4.5.26 */
{&hf_oran_initialPartialSF,
{"Initial partial SF", "oran_fh_cus.initialPartialSF",
FT_UINT8, BASE_DEC,
NULL, 0x40,
"Indicates whether the initial SF in the LBT process is full or "
"partial. 0 - full SF (two slots, 14 symbols). 1 - partial SF (only "
"second slot, last 7 symbols)",
HFILL}
},
/* Section 5.4.5.27 */
{&hf_oran_reserved,
{"reserved for future use", "oran_fh_cus.reserved",
FT_UINT16, BASE_HEX,
NULL, 0x7fff,
"This parameter is reserved for future use. Transmitter shall send "
"value \"0\", while receiver shall ignore the value received.",
HFILL}
},
/* Section 5.4.7.1.1 */
{&hf_oran_bfwCompHdr_iqWidth,
{"IQ Bit Width", "oran_fh_cus.bfwCompHdr_iqWidth",
FT_UINT8, BASE_HEX,
VALS(bfw_comp_headers_iq_width), 0xf0,
"This parameter defines the compression method and IQ bit width "
"for the beamforming weights in the specific section in the C-Plane "
"message. In this way each set of weights may employ a separate "
"compression method. Note that for the block compression methods, "
"the block size is the entire vector of beamforming weights, not "
"some subset of them.",
HFILL}
},
/* Section 5.4.7.1.1 */
{&hf_oran_bfwCompHdr_compMeth,
{"Compression Method", "oran_fh_cus.bfwCompHdr_compMeth",
FT_UINT8, BASE_HEX,
VALS(bfw_comp_headers_comp_meth), 0x0f,
"This parameter defines the compression method and IQ bit width for "
"the beamforming weights in the specific section in the C-Plane "
"message. In this way each set of weights may employ a separate "
"compression method. Note that for the block compression methods, "
"the block size is the entire vector of beamforming weights, "
"not some subset of them.",
HFILL}
},
{&hf_oran_num_bf_weights,
{"Number of BF weights", "oran_fh_cus.num_bf_weights",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"This is the number of BF weights per antenna - currently set in a preference",
HFILL}
},
#if 0
/* FIXME Section 5.4.7.1.2 */
{ &hf_oran_bfwCompParam.
{ "beamforming weight compression parameter", "oran_fh_cus.bfwCompParam",
various, | BASE_RANGE_STRING,
RVALS(bfw_comp_parms), 0x0,
"This parameter applies to the compression method specified by th"
"e associated sectionID's bfwCompMeth value.",
HFILL }
},
#endif
/* Section 5.4.7.1.2 */
{&hf_oran_blockScaler,
{"blockScaler", "oran_fh_cus.blockScaler",
FT_UINT8, BASE_HEX,
NULL, 0x0,
"unsigned, 1 integer bit, 7 fractional bits",
HFILL}
},
{&hf_oran_compBitWidth,
{"compBitWidth", "oran_fh_cus.compBitWidth",
FT_UINT8, BASE_DEC,
NULL, 0xf0,
"Length of I bits and length of Q bits after compression over entire PRB.",
HFILL}
},
{&hf_oran_compShift,
{"compShift", "oran_fh_cus.compShift",
FT_UINT8, BASE_DEC,
NULL, 0x0f,
"The shift applied to the entire PRB.",
HFILL}
},
/* Section 5.4.7.6 */
{&hf_oran_repetition,
{"repetition", "oran_fh_cus.repetition",
FT_UINT8, BASE_HEX,
NULL, 0x80,
"Repetition of a highest priority data section inside a C-Plane message",
HFILL}
},
{&hf_oran_rbgSize,
{"rbgSize", "oran_fh_cus.rbgSize",
FT_UINT8, BASE_HEX,
VALS(rbg_size_vals), 0x70,
"Number of PRBs of the resource block groups allocated by the bit mask",
HFILL}
},
{&hf_oran_rbgMask,
{"rbgMask", "oran_fh_cus.rbgMask",
FT_UINT32, BASE_HEX,
NULL, 0x0fffffff,
"Each bit indicates whether a corresponding resource block group is present",
HFILL}
},
{&hf_oran_noncontig_priority,
{"priority", "oran_fh_cus.priority",
FT_UINT8, BASE_HEX,
VALS(priority_vals), 0xc0,
NULL,
HFILL}
},
{&hf_oran_symbolMask,
{"symbolMask", "oran_fh_cus.symbolMask",
FT_UINT16, BASE_HEX,
NULL, 0x3fff,
"Each bit indicates whether the rbgMask applies to a given symbol in the slot",
HFILL}
},
/* Section 5.4.7.12 */
{&hf_oran_off_start_prb_num_prb_pair,
{"Pair", "oran_fh_cus.offStartPrb_numPrb",
FT_STRING, BASE_NONE,
NULL, 0x0,
"Pair of offStartPrb and numPrb.",
HFILL}
},
{&hf_oran_off_start_prb,
{"offStartPrb", "oran_fh_cus.offStartPrb",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"Offset of PRB range start.",
HFILL}
},
{&hf_oran_num_prb,
{"numPrb", "oran_fh_cus.numPrb",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"Number of PRBs in PRB range.",
HFILL}
},
/* Section 6.3.3.7 */
{&hf_oran_symbolId,
{"Symbol Identifier", "oran_fh_cus.symbolId",
FT_UINT8, BASE_HEX,
NULL, 0x3f,
"This parameter identifies a symbol number within a slot",
HFILL}
},
/* Section 6.3.3.11 */
{&hf_oran_startPrbu,
{"Starting PRB of User Plane Section", "oran_fh_cus.startPrbu",
FT_UINT16, BASE_DEC,
NULL, 0x03ff,
"This parameter is the starting PRB of a user plane section. For "
"one C-Plane message, there may be multiple U-Plane messages "
"associated with it and requiring defining from which PRB the contained "
"IQ data are applicable.",
HFILL}
},
/* Section 6.3.3.12 */
{&hf_oran_numPrbu,
{"Number of PRBs per User Plane Section", "oran_fh_cus.numPrbu",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"This parameter defines the PRBs where the user plane section is "
"valid.",
HFILL}
},
/* Section 6.3.3.13 */
{&hf_oran_udCompHdrMeth,
{"User Data Compression Method", "oran_fh_cus.udCompHdrMeth",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(ud_comp_header_meth), 0x0f,
"This parameter defines the compression method for "
"the user data in every section in the C-Plane message.",
HFILL}
},
/* Section 6.3.3.13 */
{&hf_oran_udCompHdrIqWidth,
{"User Data IQ width", "oran_fh_cus.udCompHdrWidth",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(ud_comp_header_width), 0xf0,
"This parameter defines the IQ bit width "
"for the user data in every section in the C-Plane message.",
HFILL}
},
#if 0
/* Section 6.3.3.14 */
{&hf_oran_udCompParam,
{"User Data Compression Parameter", "oran_fh_cus.udCompParam",
FT_UINT8, BASE_DEC | BASE_RANGE_STRING,
RVALS(udCompParams), 0x0,
"This parameter applies to whatever compression method is specified "
"by the associated sectionID's compMeth value.",
HFILL}
},
#endif
/* Section 6.3.3.15 */
{&hf_oran_iSample,
{"In-phase Sample", "oran_fh_cus.iSample",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"This parameter is the In-phase sample value", HFILL}
},
/* Section 6.3.3.16 */
{&hf_oran_qSample,
{"Quadrature Sample", "oran_fh_cus.qSample",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"This parameter is the Quadrature sample value.", HFILL}
},
{ &hf_oran_rsvd4,
{ "Reserved", "oran_fh_cus.reserved4",
FT_UINT8, BASE_DEC,
NULL, 0xf0,
"Reserved for future use", HFILL }
},
{ &hf_oran_rsvd8,
{ "Reserved", "oran_fh_cus.reserved8",
FT_UINT8, BASE_DEC,
NULL, 0x00,
"Reserved for future use", HFILL }
},
{ &hf_oran_rsvd16,
{ "Reserved", "oran_fh_cus.reserved16",
FT_UINT16, BASE_DEC,
NULL, 0x00,
"Reserved for future use", HFILL }
},
{ &hf_oran_exponent,
{ "Exponent", "oran_fh_cus.exponent",
FT_UINT8, BASE_DEC,
NULL, 0x0f,
"This parameter exponent applicable to the I & Q mantissas. "
"NOTE : Exponent is used for all mantissa sample sizes(i.e. 6bit "
"- 16bit). Likewise, a native \"uncompressed\" format is not supported "
"within this specification.",
HFILL }
},
{ &hf_oran_iq_user_data,
{ "IQ User Data", "oran_fh_cus.iq_user_data",
FT_BYTES, BASE_NONE,
NULL, 0x0,
"This parameter is used for the In-phase and Quadrature sample "
"mantissa. Twelve I/Q Samples are included per resource block. The width "
"of the mantissa can be between 6 and 16 bits",
HFILL }
},
{ &hf_oran_c_eAxC_ID,
{ "c_eAxC_ID", "oran_fh_cus.c_eaxc_id",
FT_STRING, STR_ASCII,
NULL, 0x0,
"This is a calculated field for the c_eAxC ID, which identifies the message stream",
HFILL } },
{ &hf_oran_refa,
{ "RefA", "oran_fh_cus.refa",
FT_STRING, STR_ASCII,
NULL, 0x0,
"This is a calculated field for the RefA ID, which provides a "
"reference in time.",
HFILL }
},
{ &hf_oran_disable_bfws,
{ "disableBFWs", "oran_fh_cus.disableBFWs",
FT_BOOLEAN, 8,
NULL, 0x80,
"Indicate if BFWs under section extension are disabled.",
HFILL }
},
{ &hf_oran_rad,
{ "RAD", "oran_fh_cus.rad",
FT_BOOLEAN, 8,
NULL, 0x40,
"Reset After PRB Discontinuity.",
HFILL }
},
{ &hf_oran_num_bund_prbs,
{ "numBundPrb", "oran_fh_cus.numBundPrbs",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"Number of bundled PRBs per BFWs.",
HFILL }
},
{ &hf_oran_beam_id,
{ "beamId", "oran_fh_cus.beamId",
FT_UINT16, BASE_DEC,
NULL, 0x7fff,
NULL,
HFILL }
},
{ &hf_oran_num_weights_per_bundle,
{ "Num weights per bundle", "oran_fh_cus.num_weights_per_bundle",
FT_UINT16, BASE_DEC,
NULL, 0x0,
"From preference",
HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_oran,
&ett_oran_ecpri_pcid,
&ett_oran_ecpri_rtcid,
&ett_oran_ecpri_seqid,
&ett_oran_section_type,
&ett_oran_u_timing,
&ett_oran_u_section,
&ett_oran_u_prb,
&ett_oran_section,
&ett_oran_iq,
&ett_oran_c_section_extension,
&ett_oran_bfw,
&ett_oran_offset_start_prb_num_prb
};
expert_module_t* expert_oran;
static ei_register_info ei[] = {
{ &ei_oran_invalid_bfw_iqwidth, { "oran_fh_cus.bfw_iqwidth_invalid", PI_MALFORMED, PI_ERROR, "Invalid IQ Width", EXPFILL }},
{ &ei_oran_invalid_num_bfw_weights, { "oran_fh_cus.num_bf_weights_invalid", PI_MALFORMED, PI_ERROR, "Invalid number of BF Weights", EXPFILL }},
{ &ei_oran_unsupported_bfw_compression_method, { "oran_fh_cus.unsupported_bfw_compression_method", PI_UNDECODED, PI_WARN, "Unsupported BFW Compression Method", EXPFILL }},
{ &ei_oran_invalid_sample_bit_width, { "oran_fh_cus.invalid_sample_bit_width", PI_UNDECODED, PI_ERROR, "Unsupported sample bit width", EXPFILL }},
{ &ei_oran_reserved_numBundPrb, { "oran_fh_cus.reserved_numBundPrb", PI_MALFORMED, PI_ERROR, "Reserved value of numBundPrb", EXPFILL }}
};
/* Register the protocol name and description */
proto_oran = proto_register_protocol("O-RAN Fronthaul CUS", "O-RAN FH CUS", "oran_fh_cus");
/* Allow dissector to find be found by name. */
register_dissector("oran_fh_cus", dissect_oran, proto_oran);
/* Required function calls to register the header fields and subtrees */
proto_register_field_array(proto_oran, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_oran = expert_register_protocol(proto_oran);
expert_register_field_array(expert_oran, ei, array_length(ei));
module_t * oran_module = prefs_register_protocol(proto_oran, NULL);
/* Register bit width/compression preferences separately by direction. */
prefs_register_uint_preference(oran_module, "oran.iq_bitwidth_up", "IQ Bitwidth Uplink",
"The bit width of a sample in the Uplink", 10, &pref_sample_bit_width_uplink);
prefs_register_enum_preference(oran_module, "oran.ud_comp_up", "Uplink User Data Compression",
"Uplink User Data Compression", &pref_iqCompressionUplink, compression_options, TRUE);
prefs_register_bool_preference(oran_module, "oran.ud_comp_hdr_up", "udCompHdr field is present for uplink",
"The udCompHdr field in U-Plane messages may or may not be present, depending on the "
"configuration of the O-RU. This preference instructs the dissector to expect "
"this field to be present in uplink messages.", &pref_includeUdCompHeaderUplink);
prefs_register_uint_preference(oran_module, "oran.iq_bitwidth_down", "IQ Bitwidth Downlink",
"The bit width of a sample in the Downlink", 10, &pref_sample_bit_width_downlink);
prefs_register_enum_preference(oran_module, "oran.ud_comp_down", "Downlink User Data Compression",
"Downlink User Data Compression", &pref_iqCompressionDownlink, compression_options, TRUE);
prefs_register_bool_preference(oran_module, "oran.ud_comp_hdr_down", "udCompHdr field is present for downlink",
"The udCompHdr field in U-Plane messages may or may not be present, depending on the "
"configuration of the O-RU. This preference instructs the dissector to expect "
"this field to be present in downlink messages.", &pref_includeUdCompHeaderDownlink);
/* TODO: can this be anything other than 1? */
prefs_register_uint_preference(oran_module, "oran.num_bf_weights", "Number of BF Weights per Antenna",
"Number of BF Weights per Antenna - should be signalled over M-Plane", 10, &pref_num_bf_weights);
prefs_register_uint_preference(oran_module, "oran.rbs_in_uplane_section", "Total RBs in User-Plane data section",
"This is used if numPrbu is signalled as 0", 10, &pref_data_plane_section_total_rbs);
prefs_register_uint_preference(oran_module, "oran.num_weights_per_bundle", "Number of weights per bundle",
"Used in decoding of section extension type 11 (Flexible BF weights)", 10, &pref_num_weights_per_bundle);
}
/* Simpler form of proto_reg_handoff_oran which can be used if there are
* no prefs-dependent registration function calls. */
void
proto_reg_handoff_oran(void)
{
create_dissector_handle(dissect_oran, proto_oran);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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