![Bill Meier](/assets/img/avatar_default.png)
- Use dissector_add_handle("udp",...) rather than dissector_add(""udp",0,...) svn path=/trunk/; revision=27794
609 lines
18 KiB
C
609 lines
18 KiB
C
/* packet-ccsds.c
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* Routines for CCSDS dissection
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* Copyright 2000, Scott Hovis scott.hovis@ums.msfc.nasa.gov
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* Enhanced 2008, Matt Dunkle Matthew.L.Dunkle@nasa.gov
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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/*
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* See
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*
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* http://stationpayloads.jsc.nasa.gov/J-reference/documents/ssp57002B.pdf
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*/
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/* Initialize the protocol and registered fields */
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static int proto_ccsds = -1;
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/* primary ccsds header */
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static int hf_ccsds_apid = -1;
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static int hf_ccsds_version = -1;
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static int hf_ccsds_secheader = -1;
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static int hf_ccsds_type = -1;
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static int hf_ccsds_seqnum = -1;
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static int hf_ccsds_seqflag = -1;
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static int hf_ccsds_length = -1;
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/* common ccsds secondary header */
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static int hf_ccsds_coarse_time = -1;
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static int hf_ccsds_fine_time = -1;
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static int hf_ccsds_timeid = -1;
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static int hf_ccsds_checkword = -1;
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/* payload specific ccsds secondary header */
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static int hf_ccsds_zoe = -1;
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static int hf_ccsds_packet_type_unused = -1;
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static int hf_ccsds_vid = -1;
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static int hf_ccsds_dcc = -1;
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/* core specific ccsds secondary header */
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static int hf_ccsds_spare1 = -1;
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static int hf_ccsds_packet_type = -1;
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static int hf_ccsds_spare2 = -1;
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static int hf_ccsds_element_id = -1;
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static int hf_ccsds_cmd_data_packet = -1;
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static int hf_ccsds_format_version_id = -1;
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static int hf_ccsds_extended_format_id = -1;
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static int hf_ccsds_spare3 = -1;
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static int hf_ccsds_frame_id = -1;
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/* Initialize the subtree pointers */
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static gint ett_ccsds = -1;
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static gint ett_ccsds_primary_header = -1;
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static gint ett_ccsds_secondary_header = -1;
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/*
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* Bits in the first 16-bit header word
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*/
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#define HDR_VERSION 0xe000
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#define HDR_TYPE 0x1000
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#define HDR_SECHDR 0x0800
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#define HDR_APID 0x07ff
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/* some basic sizing parameters */
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enum
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{
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IP_HEADER_LENGTH = 48,
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VCDU_HEADER_LENGTH = 6,
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CCSDS_PRIMARY_HEADER_LENGTH = 6,
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CCSDS_SECONDARY_HEADER_LENGTH = 10
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};
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/* leap year macro */
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#ifndef Leap
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# define Leap(yr) ( ( 0 == (yr)%4 && 0 != (yr)%100 ) || ( 0 == (yr)%400 ) )
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#endif
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static const value_string ccsds_primary_header_sequence_flags[] = {
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{ 0, "Continuation segment" },
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{ 1, "First segment" },
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{ 2, "Last segment" },
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{ 3, "Unsegmented data" },
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{ 0, NULL }
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};
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static const value_string ccsds_secondary_header_type[] = {
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{ 0, "Core" },
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{ 1, "Payload" },
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{ 0, NULL }
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};
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static const value_string ccsds_secondary_header_packet_type[] = {
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{ 0, "UNDEFINED" },
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{ 1, "Data Dump" },
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{ 2, "UNDEFINED" },
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{ 3, "UNDEFINED" },
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{ 4, "TLM/Status" },
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{ 5, "UNDEFINED" },
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{ 6, "Payload Private/Science" },
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{ 7, "Ancillary Data" },
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{ 8, "Essential Cmd" },
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{ 9, "System Cmd" },
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{ 10, "Payload Cmd" },
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{ 11, "Data Load/File Transfer" },
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{ 12, "UNDEFINED" },
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{ 13, "UNDEFINED" },
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{ 14, "UNDEFINED" },
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{ 15, "UNDEFINED" },
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{ 0, NULL }
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};
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static const value_string ccsds_secondary_header_element_id[] = {
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{ 0, "NASA (Ground Test Only)" },
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{ 1, "NASA" },
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{ 2, "ESA/APM" },
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{ 3, "NASDA" },
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{ 4, "RSA" },
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{ 5, "CSA" },
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{ 6, "ESA/ATV" },
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{ 7, "ASI" },
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{ 8, "ESA/ERA" },
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{ 9, "Reserved" },
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{ 10, "RSA SPP" },
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{ 11, "NASDA HTV" },
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{ 12, "Reserved" },
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{ 13, "Reserved" },
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{ 14, "Reserved" },
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{ 15, "Reserved" },
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{ 0, NULL }
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};
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static const value_string ccsds_secondary_header_cmd_data_packet[] = {
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{ 0, "Command Packet" },
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{ 1, "Data Packet" },
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{ 0, NULL }
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};
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static const value_string ccsds_secondary_header_format_id[] = {
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{ 0, "Reserved" },
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{ 1, "Essential Telemetry" },
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{ 2, "Housekeeping Tlm - 1" },
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{ 3, "Housekeeping Tlm - 2" },
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{ 4, "PCS DDT" },
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{ 5, "CCS S-Band Command Response" },
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{ 6, "Contingency Telemetry via the SMCC" },
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{ 7, "Normal Data Dump" },
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{ 8, "Extended Data Dump" },
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{ 9, "Reserved" },
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{ 10, "Reserved" },
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{ 11, "Broadcast Ancillary Data" },
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{ 12, "Reserved" },
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{ 13, "NCS to OIU Telemetry and ECOMM Telemetry" },
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{ 14, "CCS to OIU Telemetry - Direct" },
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{ 15, "Reserved" },
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{ 16, "Normal File Dump" },
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{ 17, "Extended File Dump" },
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{ 18, "NCS to FGB Telemetry" },
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{ 19, "Reserved" },
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{ 20, "ZOE Normal Dump (S-Band)" },
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{ 21, "ZOE Extended Dump (S-Band)" },
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{ 22, "EMU S-Band TLM Packet" },
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{ 23, "Reserved" },
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{ 24, "Reserved" },
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{ 25, "Reserved" },
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{ 26, "CCS to OIU Telemetry via UHF" },
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{ 27, "OSTP Telemetry (After Flight 1E, CCS R5)" },
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{ 28, "Reserved" },
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{ 29, "Reserved" },
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{ 30, "Reserved" },
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{ 31, "Reserved" },
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{ 32, "Reserved" },
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{ 33, "Reserved" },
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{ 34, "Reserved" },
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{ 35, "Reserved" },
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{ 36, "Reserved" },
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{ 37, "Reserved" },
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{ 38, "Reserved" },
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{ 39, "Reserved" },
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{ 40, "Reserved" },
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{ 41, "Reserved" },
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{ 42, "Reserved" },
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{ 43, "Reserved" },
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{ 44, "Reserved" },
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{ 45, "Reserved" },
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{ 46, "Reserved" },
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{ 47, "Reserved" },
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{ 48, "Reserved" },
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{ 49, "Reserved" },
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{ 50, "Reserved" },
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{ 51, "Reserved" },
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{ 52, "Reserved" },
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{ 53, "Reserved" },
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{ 54, "Reserved" },
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{ 55, "Reserved" },
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{ 56, "Reserved" },
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{ 57, "Reserved" },
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{ 58, "Reserved" },
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{ 59, "Reserved" },
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{ 60, "Reserved" },
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{ 61, "Reserved" },
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{ 62, "Reserved" },
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{ 63, "Reserved" },
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{ 0, NULL }
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};
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/* convert time from utc to julian values */
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void utc_to_julian ( int utc, int* year, int* julianday, int* hour, int* minute, int* second )
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{
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static int Days[2][13] =
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{
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{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
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{ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
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};
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int j, days_yr[2], left, secs;
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/* oops... */
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if ( ! year || ! julianday || ! hour || ! minute || ! second ) return;
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*year = 1970;
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*julianday = 0;
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*hour = 0;
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*minute = 0;
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*second = 0;
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days_yr[0] = days_yr[1] = 0;
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for ( j=1; j < 13; ++j )
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{
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days_yr[0] += Days[0][j];
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days_yr[1] += Days[1][j];
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}
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left = utc;
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secs = days_yr[Leap(*year)] * 24 * 60 * 60;
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while (left > secs)
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{
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++(*year);
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left -= secs;
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secs = days_yr[Leap(*year)] * 24 * 60 * 60;
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}
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*julianday = (left / (24 * 60 * 60)) + 1;
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left = left % (24 * 60 * 60);
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*hour = left / (60 * 60);
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left = left % (60 * 60);
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*minute = left / 60;
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*second = left % 60;
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}
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/* convert ccsds embedded time to a human readable string - NOT THREAD SAFE */
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static const char* embedded_time_to_string ( int coarse_time, int fine_time )
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{
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static const char* fmt = "%04d/%03d:%02d:%02d:%02d.%03d";
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static char juliantime[40];
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static int utcdiff = 0;
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int utc, yr, year, julianday, hour, minute, second, fraction;
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int multiplier = 1000;
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/* compute the static constant difference in seconds
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* between midnight 5-6 January 1980 (GPS time) and
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* seconds since 1/1/1970 (UTC time) just this once
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*/
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if ( 0 == utcdiff )
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{
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for ( yr=1970; yr < 1980; ++yr )
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{
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utcdiff += ( Leap(yr) ? 366 : 365 ) * 24 * 60 * 60;
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}
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utcdiff += 5 * 24 * 60 * 60; /* five days of January 1980 */
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}
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utc = coarse_time + utcdiff;
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utc_to_julian ( utc, &year, &julianday, &hour, &minute, &second );
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fraction = ( multiplier * ( (int)fine_time & 0xff ) ) / 256;
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g_snprintf ( juliantime, sizeof(juliantime), fmt, year, julianday, hour, minute, second, fraction );
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return juliantime;
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}
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/* Code to actually dissect the packets */
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static void
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dissect_ccsds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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proto_item *ccsds_packet;
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proto_tree *ccsds_tree;
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proto_item *primary_header;
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proto_tree *primary_header_tree;
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guint16 first_word;
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guint32 coarse_time;
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guint8 fine_time;
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proto_item *secondary_header;
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proto_tree *secondary_header_tree;
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const char* time_string;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "CCSDS");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, "CCSDS Packet");
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if (tree) {
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ccsds_packet = proto_tree_add_item(tree, proto_ccsds, tvb, 0, -1, FALSE);
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ccsds_tree = proto_item_add_subtree(ccsds_packet, ett_ccsds);
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/* build the ccsds primary header tree */
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primary_header=proto_tree_add_text(ccsds_tree, tvb, offset, CCSDS_PRIMARY_HEADER_LENGTH, "Primary CCSDS Header");
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primary_header_tree=proto_item_add_subtree(primary_header, ett_ccsds_primary_header);
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first_word=tvb_get_ntohs(tvb, offset);
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proto_tree_add_uint(primary_header_tree, hf_ccsds_version, tvb, offset, 2, first_word);
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proto_tree_add_uint(primary_header_tree, hf_ccsds_type, tvb, offset, 2, first_word);
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proto_tree_add_boolean(primary_header_tree, hf_ccsds_secheader, tvb, offset, 2, first_word);
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proto_tree_add_uint(primary_header_tree, hf_ccsds_apid, tvb, offset, 2, first_word);
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offset += 2;
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proto_tree_add_item(primary_header_tree, hf_ccsds_seqflag, tvb, offset, 2, FALSE);
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proto_tree_add_item(primary_header_tree, hf_ccsds_seqnum, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(primary_header_tree, hf_ccsds_length, tvb, offset, 2, FALSE);
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offset += 2;
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proto_item_set_end(primary_header, tvb, offset);
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/* build the ccsds secondary header tree */
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if ( first_word & HDR_SECHDR )
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{
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secondary_header=proto_tree_add_text(ccsds_tree, tvb, offset, CCSDS_SECONDARY_HEADER_LENGTH, "Secondary CCSDS Header");
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secondary_header_tree=proto_item_add_subtree(secondary_header, ett_ccsds_secondary_header);
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/* command ccsds secondary header flags */
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coarse_time=tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_coarse_time, tvb, offset, 4, FALSE);
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offset += 4;
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fine_time=tvb_get_guint8(tvb, offset);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_fine_time, tvb, offset, 1, FALSE);
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++offset;
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time_string = embedded_time_to_string ( coarse_time, fine_time );
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proto_tree_add_text(secondary_header_tree, tvb, offset-5, 5, "%s = Embedded Time", time_string);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_timeid, tvb, offset, 1, FALSE);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_checkword, tvb, offset, 1, FALSE);
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/* payload specific ccsds secondary header flags */
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if ( first_word & HDR_TYPE )
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{
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proto_tree_add_item(secondary_header_tree, hf_ccsds_zoe, tvb, offset, 1, FALSE);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_packet_type_unused, tvb, offset, 1, FALSE);
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++offset;
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proto_tree_add_item(secondary_header_tree, hf_ccsds_vid, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(secondary_header_tree, hf_ccsds_dcc, tvb, offset, 2, FALSE);
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offset += 2;
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}
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/* core specific ccsds secondary header flags */
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else
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{
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/* proto_tree_add_item(secondary_header_tree, hf_ccsds_spare1, tvb, offset, 1, FALSE); */
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proto_tree_add_item(secondary_header_tree, hf_ccsds_packet_type, tvb, offset, 1, FALSE);
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++offset;
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/* proto_tree_add_item(secondary_header_tree, hf_ccsds_spare2, tvb, offset, 2, FALSE); */
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proto_tree_add_item(secondary_header_tree, hf_ccsds_element_id, tvb, offset, 2, FALSE);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_cmd_data_packet, tvb, offset, 2, FALSE);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_format_version_id, tvb, offset, 2, FALSE);
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proto_tree_add_item(secondary_header_tree, hf_ccsds_extended_format_id, tvb, offset, 2, FALSE);
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offset += 2;
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/* proto_tree_add_item(secondary_header_tree, hf_ccsds_spare3, tvb, offset, 1, FALSE); */
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++offset;
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proto_tree_add_item(secondary_header_tree, hf_ccsds_frame_id, tvb, offset, 1, FALSE);
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++offset;
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}
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/* finish the ccsds secondary header */
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proto_item_set_end(secondary_header, tvb, offset);
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}
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/* everything that's left is the remainder of the packet data zone */
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proto_tree_add_text(ccsds_tree, tvb, offset, -1, "Data");
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}
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}
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/* Register the protocol with Wireshark
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* this format is required because a script is used to build the C function
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* that calls all the protocol registration.
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*/
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void
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proto_register_ccsds(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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/* primary ccsds header flags */
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{ &hf_ccsds_version,
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{ "Version", "ccsds.version",
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FT_UINT16, BASE_DEC, NULL, HDR_VERSION,
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NULL, HFILL }
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},
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{ &hf_ccsds_type,
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{ "Type", "ccsds.type",
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FT_UINT16, BASE_DEC, VALS(ccsds_secondary_header_type), HDR_TYPE,
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NULL, HFILL }
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},
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{ &hf_ccsds_secheader,
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{ "Secondary Header", "ccsds.secheader",
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FT_BOOLEAN, 16, NULL, HDR_SECHDR,
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"Secondary Header Present", HFILL }
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|
},
|
|
{ &hf_ccsds_apid,
|
|
{ "APID", "ccsds.apid",
|
|
FT_UINT16, BASE_DEC, NULL, HDR_APID,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_seqflag,
|
|
{ "Sequence Flags", "ccsds.seqflag",
|
|
FT_UINT16, BASE_DEC, VALS(ccsds_primary_header_sequence_flags), 0xc000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_seqnum,
|
|
{ "Sequence Number", "ccsds.seqnum",
|
|
FT_UINT16, BASE_DEC, NULL, 0x3fff,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_length,
|
|
{ "Packet Length", "ccsds.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0xffff,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
|
|
/* common ccsds secondary header flags */
|
|
{ &hf_ccsds_coarse_time,
|
|
{ "Coarse Time", "ccsds.coarse_time",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_fine_time,
|
|
{ "Fine Time", "ccsds.fine_time",
|
|
FT_UINT8, BASE_DEC, NULL, 0xff,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_timeid,
|
|
{ "Time Identifier", "ccsds.timeid",
|
|
FT_UINT8, BASE_DEC, NULL, 0xc0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_checkword,
|
|
{ "Checkword Indicator", "ccsds.checkword",
|
|
FT_UINT8, BASE_DEC, NULL, 0x20,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
|
|
/* payload specific ccsds secondary header flags */
|
|
{ &hf_ccsds_zoe,
|
|
{ "ZOE TLM", "ccsds.zoe",
|
|
FT_UINT8, BASE_DEC, NULL, 0x10,
|
|
"Contains S-band ZOE Packets", HFILL }
|
|
},
|
|
{ &hf_ccsds_packet_type_unused,
|
|
{ "Packet Type (unused for Ku-band)", "ccsds.packet_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_vid,
|
|
{ "Version Identifier", "ccsds.vid",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_dcc,
|
|
{ "Data Cycle Counter", "ccsds.dcc",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
|
|
/* core specific ccsds secondary header flags */
|
|
{ &hf_ccsds_spare1,
|
|
{ "Spare Bit 1", "ccsds.spare1",
|
|
FT_UINT8, BASE_DEC, NULL, 0x10,
|
|
"unused spare bit 1", HFILL }
|
|
},
|
|
{ &hf_ccsds_packet_type,
|
|
{ "Packet Type", "ccsds.packet_type",
|
|
FT_UINT8, BASE_DEC, VALS(ccsds_secondary_header_packet_type), 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_spare2,
|
|
{ "Spare Bit 2", "ccsds.spare2",
|
|
FT_UINT16, BASE_DEC, NULL, 0x8000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_element_id,
|
|
{ "Element ID", "ccsds.element_id",
|
|
FT_UINT16, BASE_DEC, VALS(ccsds_secondary_header_element_id), 0x7800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_cmd_data_packet,
|
|
{ "Cmd/Data Packet Indicator", "ccsds.cmd_data_packet",
|
|
FT_UINT16, BASE_DEC, VALS(ccsds_secondary_header_cmd_data_packet), 0x0400,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_format_version_id,
|
|
{ "Format Version ID", "ccsds.format_version_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x03c0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_extended_format_id,
|
|
{ "Extended Format ID", "ccsds.extended_format_id",
|
|
FT_UINT16, BASE_DEC, VALS(ccsds_secondary_header_format_id), 0x003f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_spare3,
|
|
{ "Spare Bits 3", "ccsds.spare3",
|
|
FT_UINT8, BASE_DEC, NULL, 0xff,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ccsds_frame_id,
|
|
{ "Frame ID", "ccsds.frame_id",
|
|
FT_UINT8, BASE_DEC, NULL, 0xff,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_ccsds,
|
|
&ett_ccsds_primary_header,
|
|
&ett_ccsds_secondary_header
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_ccsds = proto_register_protocol("CCSDS", "CCSDS", "ccsds");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_ccsds, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector ( "ccsds", dissect_ccsds, proto_ccsds );
|
|
}
|
|
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
* This format is required because a script is used to find these routines and
|
|
* create the code that calls these routines.
|
|
*/
|
|
void
|
|
proto_reg_handoff_ccsds(void)
|
|
{
|
|
dissector_add_handle ( "udp.port", find_dissector("ccsds") ); /* for 'decode as' */
|
|
}
|
|
|