/* packet-ccsds.c * Routines for CCSDS dissection * Copyright 2000, Scott Hovis scott.hovis@ums.msfc.nasa.gov * * $Id: packet-ccsds.c,v 1.3 2003/12/05 22:33:11 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #ifdef NEED_SNPRINTF_H # include "snprintf.h" #endif #include /* * See * * http://stationpayloads.jsc.nasa.gov/J-reference/documents/ssp57002B.pdf */ /* Initialize the protocol and registered fields */ static int proto_ccsds = -1; static int hf_ccsds_apid = -1; static int hf_ccsds_version = -1; static int hf_ccsds_secheader = -1; static int hf_ccsds_type = -1; static int hf_ccsds_seqnum = -1; static int hf_ccsds_seqflag = -1; static int hf_ccsds_length = -1; static int hf_ccsds_time = -1; static int hf_ccsds_timeid = -1; static int hf_ccsds_checkword = -1; static int hf_ccsds_zoe = -1; static int hf_ccsds_packtype = -1; static int hf_ccsds_vid = -1; static int hf_ccsds_dcc = -1; /* Initialize the subtree pointers */ static gint ett_ccsds = -1; static gint ett_header = -1; static gint ett_header2 = -1; /* * Bits in the first 16-bit header word */ #define HDR_VERSION 0xe000 #define HDR_TYPE 0x1000 #define HDR_SECHDR 0x0800 #define HDR_APID 0x07ff /* Code to actually dissect the packets */ static void dissect_ccsds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { int offset = 0; proto_item *ti; proto_tree *ccsds_tree; proto_item *header; proto_tree *header_tree; guint16 first_word; proto_item *header2; proto_tree *header2_tree; if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "CCSDS"); if (check_col(pinfo->cinfo, COL_INFO)) col_set_str(pinfo->cinfo, COL_INFO, "CCSDS Packet"); if (tree) { ti = proto_tree_add_item(tree, proto_ccsds, tvb, 0, -1, FALSE); ccsds_tree = proto_item_add_subtree(ti, ett_ccsds); header=proto_tree_add_text(ccsds_tree, tvb, 0, -1, "Primary CCSDS Header"); header_tree=proto_item_add_subtree(header, ett_header); first_word=tvb_get_ntohs(tvb, offset); proto_tree_add_uint(header_tree, hf_ccsds_version, tvb, offset, 2, first_word); proto_tree_add_uint(header_tree, hf_ccsds_type, tvb, offset, 2, first_word); proto_tree_add_boolean(header_tree, hf_ccsds_secheader, tvb, offset, 2, first_word); proto_tree_add_uint(header_tree, hf_ccsds_apid, tvb, offset, 2, first_word); offset += 2; proto_tree_add_item(header_tree, hf_ccsds_seqflag, tvb, offset, 2, FALSE); proto_tree_add_item(header_tree, hf_ccsds_seqnum, tvb, offset, 2, FALSE); offset += 2; proto_tree_add_item(header_tree, hf_ccsds_length, tvb, offset, 2, FALSE); offset += 2; proto_item_set_end(header, tvb, offset); if(first_word&HDR_SECHDR) { header2=proto_tree_add_text(ccsds_tree, tvb, offset, -1, "Secondary CCSDS Header"); header2_tree=proto_item_add_subtree(header2, ett_header2); proto_tree_add_item(header2_tree, hf_ccsds_time, tvb, offset, 5, FALSE); offset += 5; proto_tree_add_item(header2_tree, hf_ccsds_timeid, tvb, offset, 1, FALSE); proto_tree_add_item(header2_tree, hf_ccsds_checkword, tvb, offset, 1, FALSE); proto_tree_add_item(header2_tree, hf_ccsds_zoe, tvb, offset, 1, FALSE); proto_tree_add_item(header2_tree, hf_ccsds_packtype, tvb, offset, 1, FALSE); offset += 1; proto_tree_add_item(header2_tree, hf_ccsds_vid, tvb, offset, 2, FALSE); offset += 2; proto_tree_add_item(header2_tree, hf_ccsds_dcc, tvb, offset, 2, FALSE); offset += 2; proto_item_set_end(header2, tvb, offset); } proto_tree_add_text(ccsds_tree, tvb, offset, -1, "Data"); } } /* Register the protocol with Ethereal */ /* this format is require because a script is used to build the C function that calls all the protocol registration. */ void proto_register_ccsds(void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_ccsds_version, { "version", "ccsds.version", FT_UINT16, BASE_DEC, NULL, HDR_VERSION, "version", HFILL } }, { &hf_ccsds_type, { "type", "ccsds.type", FT_UINT16, BASE_DEC, NULL, HDR_TYPE, "type", HFILL } }, { &hf_ccsds_secheader, { "secondary header", "ccsds.secheader", FT_BOOLEAN, 16, NULL, HDR_SECHDR, "secondary header present", HFILL } }, { &hf_ccsds_apid, { "APID", "ccsds.apid", FT_UINT16, BASE_DEC, NULL, HDR_APID, "Represents APID", HFILL } }, { &hf_ccsds_seqflag, { "sequence flags", "ccsds.seqflag", FT_UINT16, BASE_DEC, NULL, 0xc000, "sequence flags", HFILL } }, { &hf_ccsds_seqnum, { "sequence number", "ccsds.seqnum", FT_UINT16, BASE_DEC, NULL, 0x3fff, "sequence number", HFILL } }, { &hf_ccsds_length, { "packet length", "ccsds.length", FT_UINT16, BASE_DEC, NULL, 0xffff, "packet length", HFILL } }, { &hf_ccsds_time, { "time", "ccsds.time", FT_BYTES, BASE_HEX, NULL, 0x0, "time", HFILL } }, { &hf_ccsds_timeid, { "time identifier", "ccsds.timeid", FT_UINT8, BASE_DEC, NULL, 0xC0, "time identifier", HFILL } }, { &hf_ccsds_checkword, { "checkword indicator", "ccsds.checkword", FT_UINT8, BASE_DEC, NULL, 0x20, "checkword indicator", HFILL } }, { &hf_ccsds_zoe, { "ZOE TLM", "ccsds.zoe", FT_UINT8, BASE_DEC, NULL, 0x10, "CONTAINS S-BAND ZOE PACKETS", HFILL } }, { &hf_ccsds_packtype, { "packet type", "ccsds.packtype", FT_UINT8, BASE_DEC, NULL, 0x0f, "Packet Type - Unused in Ku-Band", HFILL } }, { &hf_ccsds_vid, { "version identifier", "ccsds.vid", FT_UINT16, BASE_DEC, NULL, 0x0, "version identifier", HFILL } }, { &hf_ccsds_dcc, { "Data Cycle Counter", "ccsds.dcc", FT_UINT16, BASE_DEC, NULL, 0x0, "Data Cycle Counter", HFILL } }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_ccsds, &ett_header, &ett_header2, }; /* 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)); } /* 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_handle_t ccsds_handle; ccsds_handle = create_dissector_handle(dissect_ccsds, proto_ccsds); dissector_add_handle("udp.port", ccsds_handle); }