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|
/* packet-ecpri.c
* Routines for eCPRI dissection
* Copyright 2019, Maximilian Kohler <maximilian.kohler@viavisolutions.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ------------------------------------------------------------------------------------------------
* eCPRI Transport Network V1.2 -- Specifications
* http://www.cpri.info/downloads/Requirements_for_the_eCPRI_Transport_Network_V1_2_2018_06_25.pdf
* ------------------------------------------------------------------------------------------------
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/etypes.h>
/**************************************************************************************************/
/* Definition for eCPRI lengths */
/**************************************************************************************************/
/* eCPRI Common Header (4 Bytes) */
#define ECPRI_HEADER_LENGTH 4
/* Message Type Length */
#define ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH 4
#define ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH 4
#define ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH 8
#define ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH 12
#define ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH 20
#define ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH 3
#define ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH 4
#define ECPRI_MSG_TYPE_7_ELEMENT_SIZE 8
/**************************************************************************************************/
/* Definition for Action Types in Message Type 5: One-way Delay Measurement */
/**************************************************************************************************/
#define ECPRI_MSG_TYPE_5_REQ 0x00
#define ECPRI_MSG_TYPE_5_REQ_FOLLOWUP 0x01
#define ECPRI_MSG_TYPE_5_RESPONSE 0x02
#define ECPRI_MSG_TYPE_5_REMOTE_REQ 0x03
#define ECPRI_MSG_TYPE_5_REMOTE_REQ_FOLLOWUP 0x04
#define ECPRI_MSG_TYPE_5_FOLLOWUP 0x05
#define ECPRI_MSG_TYPE_5_RESERVED_MIN 0x06
#define ECPRI_MSG_TYPE_5_RESERVED_MAX 0xFF
/**************************************************************************************************/
/* Definition for Event Types in Message Type 7: Event Indication */
/**************************************************************************************************/
#define ECPRI_MSG_TYPE_7_FAULT_INDICATION 0x00
#define ECPRI_MSG_TYPE_7_FAULT_INDICATION_ACK 0x01
#define ECPRI_MSG_TYPE_7_NOTIF_INDICATION 0x02
#define ECPRI_MSG_TYPE_7_SYNC_REQUEST 0x03
#define ECPRI_MSG_TYPE_7_SYNC_ACK 0x04
#define ECPRI_MSG_TYPE_7_SYNC_END_INDICATION 0x05
#define ECPRI_MSG_TYPE_7_RESERVED_MIN 0x06
#define ECPRI_MSG_TYPE_7_RESERVED_MAX 0xFF
/**************************************************************************************************/
/* Definition for Fault/Notification Ranges in Message Type 7: Event Indication */
/**************************************************************************************************/
#define ECPRI_MSG_TYPE_7_FAULTS_MIN 0x000
#define ECPRI_MSG_TYPE_7_FAULTS_MAX 0x3FF
#define ECPRI_MSG_TYPE_7_NOTIF_MIN 0x400
#define ECPRI_MSG_TYPE_7_NOTIF_MAX 0x7FF
#define ECPRI_MSG_TYPE_7_VENDOR_MIN 0x800
#define ECPRI_MSG_TYPE_7_VENDOR_MAX 0xFFF
/**************************************************************************************************/
/* Function Prototypes */
/**************************************************************************************************/
void proto_register_ecpri(void);
void proto_reg_handoff_ecpri(void);
/**************************************************************************************************/
/* Initialize the subtree pointers */
/**************************************************************************************************/
static gint ett_ecpri = -1;
static gint ett_ecpri_header = -1;
static gint ett_ecpri_payload = -1;
static gint ett_ecpri_timestamp = -1;
static gint ett_ecpri_element = -1;
/**************************************************************************************************/
/* Initialize the protocol and registered fields */
/**************************************************************************************************/
static int proto_ecpri = -1;
/* Fields for Common Header */
static int hf_header = -1;
static int hf_proto_rev = -1;
static int hf_reserved = -1;
static int hf_c_bit = -1;
static int hf_msg_type = -1;
static int hf_payload_size = -1;
/* Fields for Payload */
static int hf_payload = -1;
/* Fields for Payload of Message Type 0 and 1 */
static int hf_pc_id = -1;
/* Fields for Payload of Message Type 0, 1 and 2 */
static int hf_seq_id = -1;
/* Fields for Payload of Message Type 2 */
static int hf_rtc_id = -1;
/* Fields for Payload of Message Type 3 */
static int hf_pc_id2 = -1;
static int hf_seq_id2 = -1;
/* Fields for Payload of Message Type 4 */
static int hf_rma_id = -1;
static int hf_read_write = -1;
static int hf_request_response = -1;
static int hf_element_id = -1;
static int hf_address = -1;
static int hf_data_length = -1;
/* Fields for Payload of Message Type 5 */
static int hf_measurement_id = -1;
static int hf_action_type = -1;
static int hf_timestamp = -1;
static int hf_timestamp_sec = -1;
static int hf_timestamp_nanosec = -1;
static int hf_compensation_value = -1;
/* Fields for Payload of Message Type 6 */
static int hf_reset_id = -1;
static int hf_reset_code = -1;
/* Fields for Payload of Message Type 7 */
static int hf_event_id = -1;
static int hf_event_type = -1;
static int hf_sequence_num = -1;
static int hf_number_faults_notif = -1;
static int hf_element = -1;
static int hf_element_id2 = -1;
static int hf_raise_cease = -1;
static int hf_fault_notif = -1;
static int hf_add_info = -1;
/* Fields for Payload - rest of data */
static int hf_data = -1;
/**************************************************************************************************/
/* Preference to use the eCPRI Specification 1.2 encoding */
/**************************************************************************************************/
static gboolean message_type_decoding = TRUE;
/**************************************************************************************************/
/* eCPRI Handle */
/**************************************************************************************************/
static dissector_handle_t ecpri_handle;
/**************************************************************************************************/
/* Initialize expert info fields */
/**************************************************************************************************/
static expert_field ei_ecpri_frame_length = EI_INIT;
static expert_field ei_payload_size = EI_INIT;
static expert_field ei_comp_val = EI_INIT;
static expert_field ei_time_stamp = EI_INIT;
static expert_field ei_data_length = EI_INIT;
static expert_field ei_c_bit = EI_INIT;
static expert_field ei_fault_notif = EI_INIT;
static expert_field ei_number_faults = EI_INIT;
/**************************************************************************************************/
/* Field Encoding of Message Types */
/**************************************************************************************************/
static const range_string ecpri_msg_types[] = {
/* Message Types 0 - 7 */
{ 0x0, 0x0, "IQ Data" },
{ 0x1, 0x1, "Bit Sequence" },
{ 0x2, 0x2, "Real-Time Control Data" },
{ 0x3, 0x3, "Generic Data Transfer" },
{ 0x4, 0x4, "Remote Memory Access" },
{ 0x5, 0x5, "One-Way Delay Measurement" },
{ 0x6, 0x6, "Remote Reset" },
{ 0x7, 0x7, "Event Indication" },
/* Message Types 8 - 63*/
{ 0x8, 0x3F, "Reserved" },
/* Message Types 64 - 255 */
{ 0x40, 0xFF, "Vendor Specific" },
{ 0, 0, NULL }
};
/**************************************************************************************************/
/* Field Encoding of Message Type 4: Remote Memory Access */
/**************************************************************************************************/
static const value_string read_write_coding[] = {
{ 0x0, "Read" },
{ 0x1, "Write" },
{ 0x2, "Write no Response" },
{ 0x3, "Reserved" },
{ 0x4, "Reserved" },
{ 0x5, "Reserved" },
{ 0x6, "Reserved" },
{ 0x7, "Reserved" },
{ 0x8, "Reserved" },
{ 0x9, "Reserved" },
{ 0xA, "Reserved" },
{ 0xB, "Reserved" },
{ 0xC, "Reserved" },
{ 0xD, "Reserved" },
{ 0xE, "Reserved" },
{ 0xF, "Reserved" },
{ 0, NULL }
};
static const value_string request_response_coding[] = {
{ 0x0, "Request" },
{ 0x1, "Response" },
{ 0x2, "Failure" },
{ 0x3, "Reserved" },
{ 0x4, "Reserved" },
{ 0x5, "Reserved" },
{ 0x6, "Reserved" },
{ 0x7, "Reserved" },
{ 0x8, "Reserved" },
{ 0x9, "Reserved" },
{ 0xA, "Reserved" },
{ 0xB, "Reserved" },
{ 0xC, "Reserved" },
{ 0xD, "Reserved" },
{ 0xE, "Reserved" },
{ 0xF, "Reserved" },
{ 0, NULL }
};
/**************************************************************************************************/
/* Field Encoding of Message Type 5: One-way Delay Measurement */
/**************************************************************************************************/
static const range_string action_type_coding[] = {
{ 0x00, 0x00, "Request" },
{ 0x01, 0x01, "Request with Follow_Up" },
{ 0x02, 0x02, "Response" },
{ 0x03, 0x03, "Remote Request" },
{ 0x04, 0x04, "Remote request with Follow_Up" },
{ 0x05, 0x05, "Follow_Up" },
{ 0x06, 0xFF, "Reserved" },
{ 0, 0, NULL }
};
/**************************************************************************************************/
/* Field Encoding of Message Type 6: Remote Reset */
/**************************************************************************************************/
static const range_string reset_coding[] = {
{ 0x00, 0x00, "Reserved" },
{ 0x01, 0x01, "Remote reset request" },
{ 0x02, 0x02, "Remote reset response" },
{ 0x03, 0xFF, "Reserved" },
{ 0, 0, NULL }
};
/**************************************************************************************************/
/* Field Encoding of Message Type 7: Event Indication */
/**************************************************************************************************/
static const range_string event_type_coding[] = {
{ 0x00, 0x00, "Fault(s) Indication" },
{ 0x01, 0x01, "Fault(s) Indication Acknowledge" },
{ 0x02, 0x02, "Notification(s) Indication" },
{ 0x03, 0x03, "Synchronization Request" },
{ 0x04, 0x04, "Synchronization Acknowledge" },
{ 0x05, 0x05, "Synchronization End Indication" },
{ 0x06, 0xFF, "Reserved" },
{ 0, 0, NULL }
};
static const range_string element_id_coding[] = {
{ 0x0000, 0xFFFE, "Vendor specific usage" },
{ 0xFFFF, 0xFFFF, "Fault/Notification applicable for all Elements" },
{ 0, 0, NULL }
};
static const value_string raise_ceased_coding[] = {
{ 0x0, "Raise a fault" },
{ 0x1, "Cease a fault" },
{ 0x02, "Reserved" },
{ 0x03, "Reserved" },
{ 0x04, "Reserved" },
{ 0x05, "Reserved" },
{ 0x06, "Reserved" },
{ 0x07, "Reserved" },
{ 0x08, "Reserved" },
{ 0x09, "Reserved" },
{ 0x0A, "Reserved" },
{ 0x0B, "Reserved" },
{ 0x0C, "Reserved" },
{ 0x0D, "Reserved" },
{ 0x0E, "Reserved" },
{ 0x0F, "Reserved" },
{ 0, NULL }
};
static const range_string fault_notif_coding[] = {
/* eCPRI reserved Faults from 0x000 to 0x3FF */
{ 0x000, 0x000, "General Userplane HW Fault" },
{ 0x001, 0x001, "General Userplane SW Fault" },
{ 0x002, 0x3FF, "eCPRI reserved Faults" },
/* eCPRI reserved Notifications from 0x400 to 0x7FF */
{ 0x400, 0x400, "Unknown message type received" },
{ 0x401, 0x401, "Userplane data buffer underflow" },
{ 0x402, 0x402, "Userplane data buffer overflow" },
{ 0x403, 0x403, "Userplane data arrived too early" },
{ 0x404, 0x404, "Userplane data received too late" },
{ 0x405, 0x7FF, "eCPRI reserved Notifications" },
/* Vendor Specific Fault Indication and Notification from 0x800 to 0xFFF */
{ 0x800, 0xFFF, "Vendor Specific Fault Indication/Notification" },
{ 0, 0, NULL }
};
/**************************************************************************************************/
/* Implementation of the functions */
/**************************************************************************************************/
static int dissect_ecpri(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
tvbuff_t *next_tvb;
/* Proto Items/Trees for eCPRI */
proto_item *ecpri_item;
proto_tree *ecpri_tree;
/* Proto Items/Trees for eCPRI Common Header */
proto_item *header_item;
proto_tree *header_tree;
proto_item *ti_payload_size;
proto_item *ti_c_bit;
/* Proto Items/Trees for eCPRI Payload */
proto_item *payload_item;
proto_tree *payload_tree;
/* Proto Items/Trees for Message Type 4: Remote Memory Access */
proto_item *ti_data_length;
/* Proto Items/Trees for Message Type 5: One-way Delay Measurement */
proto_item *timestamp_item;
proto_tree *timestamp_tree;
proto_item *ti_comp_val;
/* Proto Items/Trees for Message Type 7: Event Indication */
proto_item *element_item;
proto_tree *element_tree;
proto_item *ti_num_faults;
proto_item *ti_fault_notif;
int offset;
guint32 msg_type;
guint32 event_type;
guint8 concatenation;
guint32 num_faults_notif;
guint32 action_type;
guint32 fault_notif;
guint16 payload_size;
guint32 data_length;
guint16 reported_length;
guint16 remaining_length;
guint32 time_stamp_ns;
guint64 time_stamp_s;
guint64 comp_val;
reported_length = tvb_reported_length(tvb);
/* Check of eCPRI min. length (header-length) */
if (reported_length < ECPRI_HEADER_LENGTH)
return 0;
/* Set column of protocol eCPRI */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "eCPRI");
col_clear(pinfo->cinfo, COL_INFO);
offset = 0;
concatenation = tvb_get_guint8(tvb, offset) & 0x01;
if (concatenation != 0x00)
{
col_append_fstr(pinfo->cinfo, COL_INFO, "Concatenation");
}
/* do-while loop for concatenation check */
do
{
/* 4-byte boundary check for concatenation */
if (offset % 4 != 0)
offset = offset + 4 - (offset % 4);
/* Read Payload Size */
payload_size = tvb_get_ntohs(tvb, offset + 2);
/* Read C-Bit (Concatenation) */
concatenation = tvb_get_guint8(tvb, offset) & 0x01;
/* eCPRI tree */
if (payload_size + ECPRI_HEADER_LENGTH <= reported_length)
{
ecpri_item = proto_tree_add_item(tree, proto_ecpri, tvb, offset, payload_size + ECPRI_HEADER_LENGTH, ENC_NA);
}
else
{
ecpri_item = proto_tree_add_item(tree, proto_ecpri, tvb, offset, -1, ENC_NA);
expert_add_info_format(pinfo, ecpri_item, &ei_ecpri_frame_length, "eCPRI frame length %d is too small, should be min. %d", reported_length, payload_size + ECPRI_HEADER_LENGTH);
}
ecpri_tree = proto_item_add_subtree(ecpri_item, ett_ecpri);
/* eCPRI header-subtree */
header_item = proto_tree_add_item(ecpri_tree, hf_header, tvb, offset, ECPRI_HEADER_LENGTH, ENC_BIG_ENDIAN);
header_tree = proto_item_add_subtree(header_item, ett_ecpri_header);
proto_tree_add_item(header_tree, hf_proto_rev, tvb, offset, 1, ENC_NA);
proto_tree_add_item(header_tree, hf_reserved, tvb, offset, 1, ENC_NA);
ti_c_bit = proto_tree_add_item(header_tree, hf_c_bit, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item_ret_uint(header_tree, hf_msg_type, tvb, offset, 1, ENC_NA, &msg_type);
/* Append Message Type into info column */
col_append_sep_fstr(pinfo->cinfo, COL_INFO, ",", "Message Type: %s", try_rval_to_str(msg_type, ecpri_msg_types));
offset += 1;
ti_payload_size = proto_tree_add_item(header_tree, hf_payload_size, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* eCPRI payload-subtree */
/* Length Check */
if (reported_length >= ECPRI_HEADER_LENGTH + payload_size)
{
payload_item = proto_tree_add_item(ecpri_tree, hf_payload, tvb, offset, payload_size, ENC_NA);
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too big, maximal %d is possible", payload_size, reported_length - ECPRI_HEADER_LENGTH);
payload_item = proto_tree_add_item(ecpri_tree, hf_payload, tvb, offset, -1, ENC_NA);
}
payload_tree = proto_item_add_subtree(payload_item, ett_ecpri_payload);
remaining_length = reported_length - offset;
if (message_type_decoding)
{
switch (msg_type)
{
case 0x00:
/* IQ Data */
case 0x01:
/* Bit Sequence */
if (payload_size >= ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_pc_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(payload_tree, hf_seq_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
remaining_length -= ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH;
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_0_1_PAYLOAD_MIN_LENGTH);
}
break;
case 0x02:
/* Real-Time Control Data */
if (payload_size >= ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_rtc_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(payload_tree, hf_seq_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
remaining_length -= ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH;
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_2_PAYLOAD_MIN_LENGTH);
}
break;
case 0x03:
/* Generic Data Transfer */
if (payload_size >= ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_pc_id2, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(payload_tree, hf_seq_id2, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
remaining_length -= ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH;
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_3_PAYLOAD_MIN_LENGTH);
}
break;
case 0x04:
/* Remote Memory Access */
if (payload_size >= ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_rma_id, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(payload_tree, hf_read_write, tvb, offset, 1, ENC_NA);
proto_tree_add_item(payload_tree, hf_request_response, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(payload_tree, hf_element_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(payload_tree, hf_address, tvb, offset, 6, ENC_NA);
offset += 6;
ti_data_length = proto_tree_add_item_ret_uint(payload_tree, hf_data_length, tvb, offset, 2, ENC_BIG_ENDIAN, &data_length);
offset += 2;
remaining_length -= ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH)
{
if (data_length == (guint32)(payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH))
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH;
}
else if (data_length < (guint32)(payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH))
{
expert_add_info_format(pinfo, ti_data_length, &ei_data_length, "Data Length %d is too small, should be %d", data_length, payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH);
}
else
{
expert_add_info_format(pinfo, ti_data_length, &ei_data_length, "Data Length %d is too big, should be %d", data_length, payload_size - ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH);
}
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_4_PAYLOAD_MIN_LENGTH);
}
break;
case 0x05:
/* One-way Delay Measurement */
if (payload_size >= ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_measurement_id, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item_ret_uint(payload_tree, hf_action_type, tvb, offset, 1, ENC_NA, &action_type);
offset += 1;
/* Time Stamp for seconds and nano-seconds */
timestamp_item = proto_tree_add_item(payload_tree, hf_timestamp, tvb, offset, 10, ENC_NA);
timestamp_tree = proto_item_add_subtree(timestamp_item, ett_ecpri_timestamp);
proto_tree_add_item_ret_uint64(timestamp_tree, hf_timestamp_sec, tvb, offset, 6, ENC_BIG_ENDIAN, &time_stamp_s);
offset += 6;
proto_tree_add_item_ret_uint(timestamp_tree, hf_timestamp_nanosec, tvb, offset, 4, ENC_BIG_ENDIAN, &time_stamp_ns);
offset += 4;
if (action_type >= ECPRI_MSG_TYPE_5_RESERVED_MIN)
{
expert_add_info_format(pinfo, timestamp_item, &ei_time_stamp, "Time stamp is not defined for Action Type %d", action_type);
}
else if (action_type != ECPRI_MSG_TYPE_5_REQ && action_type != ECPRI_MSG_TYPE_5_RESPONSE && action_type != ECPRI_MSG_TYPE_5_FOLLOWUP && time_stamp_s != 0x0000000000000000 && time_stamp_ns != 0x00000000)
{
expert_add_info_format(pinfo, timestamp_item, &ei_time_stamp, "Time stamp is not defined for Action Type %d, should be 0", action_type);
}
ti_comp_val = proto_tree_add_item_ret_uint64(payload_tree, hf_compensation_value, tvb, offset, 8, ENC_BIG_ENDIAN, &comp_val);
proto_item_append_text(ti_comp_val, " = %fns", comp_val / 65536.0);
if (action_type >= ECPRI_MSG_TYPE_5_RESERVED_MIN)
{
expert_add_info_format(pinfo, timestamp_item, &ei_time_stamp, "Compensation Value is not defined for Action Type %d", action_type);
}
else if (action_type != ECPRI_MSG_TYPE_5_REQ && action_type != ECPRI_MSG_TYPE_5_RESPONSE && action_type != ECPRI_MSG_TYPE_5_FOLLOWUP && comp_val != 0x0000000000000000)
{
expert_add_info_format(pinfo, ti_comp_val, &ei_comp_val, "Compensation Value is not defined for Action Type %d, should be 0", action_type);
}
offset += 8;
remaining_length -= ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH;
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_5_PAYLOAD_MIN_LENGTH);
}
break;
case 0x06:
/* Remote Reset */
if (payload_size >= ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_reset_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(payload_tree, hf_reset_code, tvb, offset, 1, ENC_NA);
offset += 1;
remaining_length -= ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH;
if (remaining_length >= payload_size - ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_data, tvb, offset, payload_size - ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH, ENC_NA);
offset += payload_size - ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH;
}
}
}
else
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_6_PAYLOAD_MIN_LENGTH);
}
break;
case 0x07:
/* Event Indication */
if (payload_size >= ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH)
{
if (remaining_length >= ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH)
{
proto_tree_add_item(payload_tree, hf_event_id, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item_ret_uint(payload_tree, hf_event_type, tvb, offset, 1, ENC_NA, &event_type);
offset += 1;
proto_tree_add_item(payload_tree, hf_sequence_num, tvb, offset, 1, ENC_NA);
offset += 1;
ti_num_faults = proto_tree_add_item_ret_uint(payload_tree, hf_number_faults_notif, tvb, offset, 1, ENC_NA, &num_faults_notif);
offset += 1;
/* Only for Event Type Fault Indication (0x00) and Notification Indication (0x02) */
if (event_type == ECPRI_MSG_TYPE_7_FAULT_INDICATION || event_type == ECPRI_MSG_TYPE_7_NOTIF_INDICATION)
{
/* These two Event Types should have notifications or faults */
if (num_faults_notif > 0)
{
/* Check Size of Elements */
if (payload_size == ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH + num_faults_notif * ECPRI_MSG_TYPE_7_ELEMENT_SIZE)
{
/* Dissect elements in loop */
for (guint32 i = 0; i < num_faults_notif; i++)
{
element_item = proto_tree_add_item(payload_tree, hf_element, tvb, offset, ECPRI_MSG_TYPE_7_ELEMENT_SIZE, ENC_NA);
proto_item_prepend_text(element_item, "#%d: ", i + 1);
element_tree =proto_item_add_subtree(element_item, ett_ecpri_element);
proto_tree_add_item(element_tree, hf_element_id2, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(element_tree, hf_raise_cease, tvb, offset, 1, ENC_NA);
ti_fault_notif = proto_tree_add_item_ret_uint(element_tree, hf_fault_notif, tvb, offset, 2, ENC_BIG_ENDIAN, &fault_notif);
/* Faults and Notifications cannot be mixed */
if (event_type == ECPRI_MSG_TYPE_7_FAULT_INDICATION && !((fault_notif <= ECPRI_MSG_TYPE_7_FAULTS_MAX) || (fault_notif >= ECPRI_MSG_TYPE_7_VENDOR_MIN && fault_notif <= ECPRI_MSG_TYPE_7_VENDOR_MAX)))
{
expert_add_info_format(pinfo, ti_fault_notif, &ei_fault_notif, "Only Faults are permitted with Event Type Faults Indication (0x%.2X)", event_type);
}
else if (event_type == ECPRI_MSG_TYPE_7_NOTIF_INDICATION && !((fault_notif >= ECPRI_MSG_TYPE_7_NOTIF_MIN && fault_notif <= ECPRI_MSG_TYPE_7_NOTIF_MAX) || (fault_notif >= ECPRI_MSG_TYPE_7_VENDOR_MIN && fault_notif <= ECPRI_MSG_TYPE_7_VENDOR_MAX)))
{
expert_add_info_format(pinfo, ti_fault_notif, &ei_fault_notif, "Only Notifications are permitted with Event Type Notifications Indication (0x%.2X)", event_type);
}
offset += 2;
proto_tree_add_item(element_tree, hf_add_info, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
}
}
else if (payload_size < ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH + num_faults_notif * ECPRI_MSG_TYPE_7_ELEMENT_SIZE)
{
expert_add_info_format(pinfo, ti_num_faults, &ei_number_faults, "Number of Faults/Notif %d is maybe too big", num_faults_notif);
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size is maybe too small");
}
else
{
expert_add_info_format(pinfo, ti_num_faults, &ei_number_faults, "Number of Faults/Notif %d is maybe too small", num_faults_notif);
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size is maybe too big");
}
}
else
{
expert_add_info_format(pinfo, ti_num_faults, &ei_number_faults, "Number of Faults/Notif %d should be > 0", num_faults_notif);
}
}
else if (event_type == ECPRI_MSG_TYPE_7_FAULT_INDICATION_ACK || event_type == ECPRI_MSG_TYPE_7_SYNC_REQUEST || event_type == ECPRI_MSG_TYPE_7_SYNC_ACK || event_type == ECPRI_MSG_TYPE_7_SYNC_END_INDICATION)
{
/* Number of Faults/Notifs should be 0, only 4 Byte possible*/
if (payload_size > 4)
{
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d should be 4", payload_size);
}
/* These Event Types shouldn't have faults or notifications */
if (num_faults_notif != 0)
{
expert_add_info_format(pinfo, ti_num_faults, &ei_number_faults, "Number of Faults/Notif %d should be 0", num_faults_notif);
}
}
else
{
/* These Event Types are reserved, don't know how to decode */
if (num_faults_notif != 0)
{
expert_add_info_format(pinfo, ti_num_faults, &ei_number_faults, "Number of Faults/Notif %d, but no knowledge about encoding, because Event Type is reserved.", num_faults_notif);
}
}
}
}
else
{
/* Minimal Length is bigger then actual Payload Size */
expert_add_info_format(pinfo, ti_payload_size, &ei_payload_size, "Payload Size %d is too small for encoding Message Type %d. Should be min. %d", payload_size, msg_type, ECPRI_MSG_TYPE_7_PAYLOAD_MIN_LENGTH);
}
break;
default:
/* Reserved or Vendor Specific */
break;
}
}
/* If Preference not chosen, Payload will be not decoded */
else
{
if (reported_length >= offset + payload_size)
{
offset += payload_size;
}
}
} while (concatenation != 0 && reported_length - offset >= ECPRI_HEADER_LENGTH);
if (concatenation != 0)
expert_add_info_format(pinfo, ti_c_bit, &ei_c_bit, "Concatenation Bit is 1, should be 0");
/* Not dissected buffer */
if (offset != 0)
{
next_tvb = tvb_new_subset_remaining(tvb, offset);
call_data_dissector(next_tvb, pinfo, tree);
}
return reported_length;
}
void proto_register_ecpri(void)
{
static hf_register_info hf[] = {
/* eCPRI Common Header */
{ &hf_header, { "eCPRI Common Header", "ecpri.header", FT_UINT32, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_proto_rev, { "Protocol Revision", "ecpri.revision", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL } },
{ &hf_reserved, { "Reserved", "ecpri.reserved", FT_UINT8, BASE_DEC, NULL, 0x0E, NULL, HFILL } },
{ &hf_c_bit, { "C-Bit", "ecpri.cbit", FT_UINT8, BASE_DEC, NULL, 0x01, NULL, HFILL } },
{ &hf_msg_type, { "Message Type", "ecpri.type", FT_UINT8, BASE_HEX|BASE_RANGE_STRING, RVALS(ecpri_msg_types), 0x00, NULL, HFILL } },
{ &hf_payload_size, { "Payload Size", "ecpri.size", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } },
/* eCPRI Payload */
{ &hf_payload, { "eCPRI Payload", "ecpri.payload", FT_BYTES, SEP_COLON, NULL, 0x00, NULL, HFILL } },
/* Message Type 0 and 1: IQ Data and Bit Sequence */
{ &hf_pc_id, { "PC_ID", "ecpri.pcid", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } },
/* Message Type 0, 1 and 2: IQ Data, Bit Sequence and Real-Time Control Data */
{ &hf_seq_id, { "SEQ_ID", "ecpri.seqid", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } },
/* Message Type 2: Real-Time Control Data */
{ &hf_rtc_id, { "RTC_ID", "ecpri.rtcid", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } },
/* Message Type 3: Generic Data Transfer */
{ &hf_pc_id2, { "PC_ID", "ecpri.pcid", FT_UINT32, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_seq_id2, { "SEQ_ID", "ecpri.seqid", FT_UINT32, BASE_HEX, NULL, 0x00, NULL, HFILL } },
/* Message Type 4: Remote Memory Access */
{ &hf_rma_id, { "Remote Memory Access ID", "ecpri.rmaid", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_read_write, { "Read/Write", "ecpri.rw", FT_UINT8, BASE_HEX, VALS(read_write_coding), 0xF0, NULL, HFILL } },
{ &hf_request_response, { "Request/Response", "ecpri.reqresp", FT_UINT8, BASE_HEX, VALS(request_response_coding), 0x0F, NULL, HFILL } },
{ &hf_element_id, { "Element ID", "ecpri.elementid", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_address, { "Address", "ecpri.address", FT_BYTES, SEP_COLON, NULL, 0x00, NULL, HFILL } },
{ &hf_data_length, { "Data Length", "ecpri.length", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } },
/* Message Type 5: One-way Delay Measurement */
{ &hf_measurement_id, { "Measurement ID", "ecpri.measurementid", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_action_type, { "Action Type", "ecpri.actiontype", FT_UINT8, BASE_HEX|BASE_RANGE_STRING, RVALS(action_type_coding), 0x00, NULL, HFILL } },
{ &hf_timestamp, { "Time Stamp", "ecpri.timestamp", FT_BYTES, SEP_COLON, NULL, 0x00, NULL, HFILL } },
{ &hf_timestamp_sec, { "Seconds", "ecpri.sec", FT_UINT48, BASE_DEC|BASE_UNIT_STRING, &units_seconds, 0x00, NULL, HFILL } },
{ &hf_timestamp_nanosec, { "Nanoseconds", "ecpri.nanosec", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_nanoseconds, 0x00, NULL, HFILL } },
{ &hf_compensation_value, { "Compensation Value", "ecpri.compval", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } },
/* Message Type 6: Remote Reset */
{ &hf_reset_id, { "Reset ID", "ecpri.resetid", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_reset_code, { "Reset Code Op", "ecpri.resetcode", FT_UINT8, BASE_HEX|BASE_RANGE_STRING, RVALS(reset_coding), 0x00, NULL, HFILL } },
/* Message Type 7: Event Indication */
{ &hf_event_id, { "Event ID", "ecpri.eventid", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL } },
{ &hf_event_type, { "Event Type", "ecpri.eventtype", FT_UINT8, BASE_HEX|BASE_RANGE_STRING, RVALS(event_type_coding), 0x00, NULL, HFILL } },
{ &hf_sequence_num, { "Sequence Number", "ecpri.seqnum", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL } },
{ &hf_number_faults_notif, { "Number of Faults/Notifications", "ecpri.numberfaultnotif", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL } },
{ &hf_element, { "Element", "ecpri.element", FT_BYTES, SEP_COLON, NULL, 0x00, NULL, HFILL } },
{ &hf_element_id2, { "Element ID", "ecpri.elementid", FT_UINT16, BASE_HEX|BASE_RANGE_STRING, RVALS(element_id_coding), 0x00, NULL, HFILL } },
{ &hf_raise_cease, { "Raise/Cease", "ecpri.raisecease", FT_UINT8, BASE_HEX, VALS(raise_ceased_coding), 0xF0, NULL, HFILL } },
{ &hf_fault_notif, { "Fault/Notification", "ecpri.faultnotif", FT_UINT16, BASE_HEX|BASE_RANGE_STRING, RVALS(fault_notif_coding), 0x0FFF, NULL, HFILL } },
{ &hf_add_info, { "Additional Information", "ecpri.addinfo", FT_UINT32, BASE_HEX, NULL, 0x00, NULL, HFILL } },
/* Rest of Payload */
{ &hf_data, { "User Data", "ecpri.data", FT_BYTES, SEP_COLON, NULL, 0x00, NULL, HFILL } }
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_ecpri,
&ett_ecpri_header,
&ett_ecpri_payload,
&ett_ecpri_timestamp,
&ett_ecpri_element
};
static ei_register_info ei[] = {
{ &ei_ecpri_frame_length, { "ecpri.frame.length.invalid", PI_PROTOCOL, PI_ERROR, "Invalid eCPRI Frame Length", EXPFILL }},
{ &ei_payload_size, { "ecpri.payload.size.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Payload Size", EXPFILL }},
{ &ei_data_length, { "ecpri.data.length.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Data Length", EXPFILL }},
{ &ei_comp_val, { "ecpri.comp.val.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Compensation Value", EXPFILL }},
{ &ei_time_stamp, { "ecpri.time.stamp.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Time Stamp", EXPFILL }},
{ &ei_c_bit, { "ecpri.concat.bit.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Concatenation Bit", EXPFILL }},
{ &ei_fault_notif, { "ecpri.fault.notif.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Fault/Notification", EXPFILL }},
{ &ei_number_faults, { "ecpri.num.faults.invalid", PI_PROTOCOL, PI_ERROR, "Invalid Number of Faults", EXPFILL }}
};
expert_module_t* expert_ecpri;
module_t* module_message_decoding;
/* Register the protocol name and description */
proto_ecpri = proto_register_protocol("evolved Common Public Radio Interface", /* Protoname */
"eCPRI", /* Proto Shortname */
"ecpri"); /* Proto Abbrev */
ecpri_handle = register_dissector("ecpri", dissect_ecpri, proto_ecpri);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_ecpri, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register Expert Info */
expert_ecpri = expert_register_protocol(proto_ecpri);
expert_register_field_array(expert_ecpri, ei, array_length(ei));
/* Register Preference */
module_message_decoding = prefs_register_protocol( proto_ecpri, NULL);
/* If not set, it shows which message type was used, but no decoding of payload */
prefs_register_bool_preference(module_message_decoding,
"ecpripref.msg.decoding",
"Decode Message Type",
"Decode the Message Types according to eCPRI Specification V1.2",
&message_type_decoding);
}
void proto_reg_handoff_ecpri(void)
{
dissector_add_uint("ethertype", ETHERTYPE_ECPRI, ecpri_handle); /* Ethertypes 0xAEFE */
dissector_add_uint_range_with_preference("udp.port", "", ecpri_handle); /* UDP Port Preference */
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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