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Diffstat (limited to 'epan/dissectors/packet-link16.c')
-rw-r--r-- | epan/dissectors/packet-link16.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/epan/dissectors/packet-link16.c b/epan/dissectors/packet-link16.c new file mode 100644 index 00000000..3f63111a --- /dev/null +++ b/epan/dissectors/packet-link16.c @@ -0,0 +1,291 @@ +/* packet-link16.c + * Routines for Link 16 message dissection (MIL-STD-6016) + * William Robertson <aliask@gmail.com> + * Peter Ross <peter.ross@dsto.defence.gov.au> + * + * http://willrobertson.id.au/resources/wireshark/DSTO-TN-1257.pdf + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> +#include "packet-link16.h" + +void proto_register_link16(void); + +/* Elmasry, G., (2012), Tactical Wireless Communications and Networks: Design Concepts and Challenges, Wiley, ISBN 9781119951766. */ +enum { + WORDFORMAT_INITIAL = 0, + WORDFORMAT_CONTINUATION, + WORDFORMAT_EXTENSION +}; + +static const value_string WordFormat_Strings[] = { + { WORDFORMAT_INITIAL, "Initial Word" }, + { WORDFORMAT_CONTINUATION, "Continuation Word" }, + { WORDFORMAT_EXTENSION, "Extension Word" }, + { 0, NULL }, +}; + +/* Viasat, Inc., (2012), Link 16 Network Participant Group and Message Card, accessed from <http://www.viasat.com/files/assets/assets/Link16_NPG_Message_Card_100112a.pdf> on 15 April 2013. */ +static const value_string Link16_Label_Strings[] = { + { 0, "Network Management" }, + { 1, "Network Management" }, + { 2, "Precise Participant Location and Identification" }, + { 3, "Surveillance" }, + { 5, "Anti-submarine Warfare" }, + { 6, "Intelligence" }, + { 7, "Information Management" }, + { 8, "Information Management" }, + { 9, "Weapons Coordination and Management" }, + { 10, "Weapons Coordination and Management" }, + { 11, "Weapons Coordination and Management" }, + { 12, "Control" }, + { 13, "Platform and System Status" }, + { 14, "Electronic Warfare" }, + { 15, "Threat Warning" }, + { 16, "Imagery" }, + { 17, "Weather" }, + { 28, "National Use" }, + { 29, "National Use" }, + { 30, "National Use" }, + { 31, "Miscellaneous" }, + { 0, NULL }, +}; + +/* Viasat, Inc., (2012), Link 16 Network Participant Group and Message Card, accessed from <http://www.viasat.com/files/assets/assets/Link16_NPG_Message_Card_100112a.pdf> on 15 April 2013. */ +#define MKPAIR(a, b) (((b) << 5) | (a)) +static const value_string Link16_Message_Strings[] = { + { MKPAIR(0, 0), "Initial Entry" }, + { MKPAIR(0, 1), "Test" }, + { MKPAIR(0, 2), "Network Time Update" }, + { MKPAIR(0, 3), "Time Slot Assignment" }, + { MKPAIR(0, 4), "Radio Relay Control" }, + { MKPAIR(0, 5), "Repromulgation Relay" }, + { MKPAIR(0, 6), "Communication Control" }, + { MKPAIR(0, 7), "Time Slot Reallocation" }, + { MKPAIR(1, 0), "Connectivity Interrogation" }, + { MKPAIR(1, 1), "Connectivity Status" }, + { MKPAIR(1, 2), "Route Establishment" }, + { MKPAIR(1, 3), "Acknowledgment" }, + { MKPAIR(1, 4), "Communication Status" }, + { MKPAIR(1, 5), "Net Control Initialization" }, + { MKPAIR(1, 6), "Needline Participation Group Assignment" }, + { MKPAIR(2, 0), "Indirect Interface Unit PPLI" }, + { MKPAIR(2, 2), "Air PPLI" }, + { MKPAIR(2, 3), "Surface PPLI" }, + { MKPAIR(2, 4), "Subsurface PPLI" }, + { MKPAIR(2, 5), "Land Point PPLI" }, + { MKPAIR(2, 6), "Land Track PPLI" }, + { MKPAIR(3, 0), "Reference Point" }, + { MKPAIR(3, 1), "Emergency Point" }, + { MKPAIR(3, 2), "Air Track" }, + { MKPAIR(3, 3), "Surface Track" }, + { MKPAIR(3, 4), "Subsurface Track" }, + { MKPAIR(3, 5), "Land Point or Track" }, + { MKPAIR(3, 6), "Space Track" }, + { MKPAIR(3, 7), "Electronic Warfare Product Information" }, + { MKPAIR(5, 4), "Acoustic Bearing and Range" }, + { MKPAIR(6, 0), "Amplification" }, + { MKPAIR(7, 0), "Track Management" }, + { MKPAIR(7, 1), "Data Update Request" }, + { MKPAIR(7, 2), "Correlation" }, + { MKPAIR(7, 3), "Pointer" }, + { MKPAIR(7, 4), "Track Identifier" }, + { MKPAIR(7, 5), "IFF/SIF Management" }, + { MKPAIR(7, 6), "Filter Management" }, + { MKPAIR(7, 7), "Association" }, + { MKPAIR(8, 0), "Unit Designator" }, + { MKPAIR(8, 1), "Mission Correlator Change" }, + { MKPAIR(9, 0), "Command" }, + { MKPAIR(10, 2), "Engagement Status" }, + { MKPAIR(10, 3), "Handover" }, + { MKPAIR(10, 5), "Controlling Unit Report" }, + { MKPAIR(10, 6), "Pairing" }, + { MKPAIR(11, 0), "From the Weapon" }, + { MKPAIR(11, 1), "To the Weapon" }, + { MKPAIR(11, 2), "Weapon Coordination" }, + { MKPAIR(12, 0), "Mission Assignment" }, + { MKPAIR(12, 1), "Vector" }, + { MKPAIR(12, 2), "Precision Aircraft Direction" }, + { MKPAIR(12, 3), "Flight Path" }, + { MKPAIR(12, 4), "Controlling Unit Change" }, + { MKPAIR(12, 5), "Target/Track Correlation" }, + { MKPAIR(12, 6), "Target Sorting" }, + { MKPAIR(12, 7), "Target Bearing" }, + { MKPAIR(13, 0), "Airfield Status" }, + { MKPAIR(13, 2), "Air Platform and System Status" }, + { MKPAIR(13, 3), "Surface Platform and System Status" }, + { MKPAIR(13, 4), "Subsurface Platform and System Status" }, + { MKPAIR(13, 5), "Land Platform and System Status" }, + { MKPAIR(14, 0), "Parametric Information" }, + { MKPAIR(14, 2), "Electronic Warfare Control / Coordination" }, + { MKPAIR(15, 0), "Threat Warning" }, + { MKPAIR(16, 0), "Imagery" }, + { MKPAIR(17, 0), "Weather Over target" }, + { MKPAIR(28, 0), "U.S. National 1 (Army)" }, + { MKPAIR(28, 1), "U.S. National 2 (Navy)" }, + { MKPAIR(28, 2), "U.S. National 3 (Air Force)" }, + { MKPAIR(28, 3), "U.S. National 4 (Marine Corps)" }, + { MKPAIR(28, 4), "French National 1" }, + { MKPAIR(28, 5), "French National 2" }, + { MKPAIR(28, 6), "U.S. National 5 (NSA)" }, + { MKPAIR(28, 7), "UK National" }, + { MKPAIR(31, 0), "Over-the-Air Rekeying Management" }, + { MKPAIR(31, 1), "Over-the-Air Rekeying" }, + { MKPAIR(31, 7), "No Statement" }, + { 0, NULL }, +}; + +/* Viasat, Inc., (2012), Link 16 Network Participant Group and Message Card, accessed from <http://www.viasat.com/files/assets/assets/Link16_NPG_Message_Card_100112a.pdf> on 15 April 2013. */ +const value_string Link16_NPG_Strings[] = { + { 1, "Initial Entry" }, + { 2, "RTT-A" }, + { 3, "RTT-B" }, + { 4, "Network Management" }, + { 5, "PPLI and Status" }, + { 6, "PPLI and Status" }, + { 7, "Surveillance" }, + { 8, "Mission Management/Weapons Coordination" }, + { 9, "Control" }, + { 11, "Image Transfer" }, + { 12, "Voice A" }, + { 13, "Voice B" }, + { 18, "Network Enabled Weapons" }, + { 19, "Fighter-to-Fighter A" }, + { 20, "Fighter-to-Fighter B" }, + { 21, "Engagement Coordination" }, + { 27, "Joint Net PPLI" }, + { 28, "Distributed Network Management" }, + { 0, NULL }, +}; + +static int proto_link16 = -1; + +static gint hf_link16_wordformat = -1; +static gint hf_link16_label = -1; +static gint hf_link16_sublabel = -1; +static gint hf_link16_mli = -1; +static gint hf_link16_contlabel = -1; + +static gint ett_link16 = -1; + +static int * const link16_initial_word_fields[] = { + &hf_link16_wordformat, + &hf_link16_label, + &hf_link16_sublabel, + &hf_link16_mli, + NULL +}; + +static int * const link16_continuation_word_fields[] = { + &hf_link16_wordformat, + &hf_link16_contlabel, + NULL +}; + +static int * const link16_extension_or_other_word_fields[] = { + &hf_link16_wordformat, + NULL +}; + +static int * const *link16_fields[4] = { + link16_initial_word_fields, + link16_continuation_word_fields, + link16_extension_or_other_word_fields, + link16_extension_or_other_word_fields +}; + +static int dissect_link16(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + Link16State *state = (Link16State *)data; + proto_item *link16_item = NULL; + proto_tree *link16_tree = NULL; + guint16 cache; + guint8 wordformat, contlabel; + + if (!state) + REPORT_DISSECTOR_BUG("Link 16 dissector state missing"); + + cache = tvb_get_letohs(tvb, 0); + wordformat = cache & 0x3; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "Link 16"); + + if (tree) { + link16_item = proto_tree_add_item(tree, proto_link16, tvb, 0, -1, ENC_NA); + link16_tree = proto_item_add_subtree(link16_item, ett_link16); + proto_tree_add_bitmask_text(link16_tree, tvb, 0, 2, "Header", NULL, ett_link16, link16_fields[wordformat], ENC_LITTLE_ENDIAN, BMT_NO_APPEND); + } + + /* Elmasry, G., (2012), Tactical Wireless Communications and Networks: Design Concepts and Challenges, Wiley, ISBN 9781119951766. */ + switch (wordformat) { + case WORDFORMAT_INITIAL: + state->label = (cache >> 2) & 0x1F; + state->sublabel = (cache >> 7) & 0x7; + state->extension = 0; + col_append_fstr(pinfo->cinfo, COL_INFO, " J%d.%dI", state->label, state->sublabel); + + proto_item_append_text(link16_item, " J%d.%dI", state->label, state->sublabel); + break; + case WORDFORMAT_EXTENSION: + col_append_fstr(pinfo->cinfo, COL_INFO, " J%d.%dE%d", state->label, state->sublabel, state->extension); + + proto_item_append_text(link16_item, " J%d.%dE%d", state->label, state->sublabel, state->extension); + state->extension++; + break; + case WORDFORMAT_CONTINUATION: + contlabel = (cache >> 2) & 0x1F; + col_append_fstr(pinfo->cinfo, COL_INFO, " J%d.%dC%d", state->label, state->sublabel, contlabel); + + proto_item_append_text(link16_item, " J%d.%dC%d", state->label, state->sublabel, contlabel); + } + + proto_item_append_text(link16_item, " %s", val_to_str_const(MKPAIR(state->label, state->sublabel), Link16_Message_Strings, "Unknown")); + + return tvb_captured_length(tvb); +} + +void proto_register_link16(void) +{ + static hf_register_info hf[] = { + { &hf_link16_wordformat, + { "Word Format", "link16.wordformat", FT_UINT16, BASE_DEC, VALS(WordFormat_Strings), 0x0003, + NULL, HFILL }}, + { &hf_link16_label, + { "Label", "link16.label", FT_UINT16, BASE_DEC, VALS(Link16_Label_Strings), 0x007C, + NULL, HFILL }}, + { &hf_link16_sublabel, + { "Sublabel", "link16.sublabel", FT_UINT16, BASE_DEC, NULL, 0x0380, + NULL, HFILL }}, + { &hf_link16_mli, + { "Message Length Indicator", "link16.mli", FT_UINT16, BASE_DEC, NULL, 0x1C00, + NULL, HFILL }}, + { &hf_link16_contlabel, + { "Continuation Word Label", "link16.contlabel", FT_UINT16, BASE_DEC, NULL, 0x7C, + NULL, HFILL }} + }; + static gint *ett[] = { + &ett_link16, + }; + + proto_link16 = proto_register_protocol("Link 16", "LINK16", "link16"); + proto_register_field_array(proto_link16, hf, array_length (hf)); + proto_register_subtree_array(ett, array_length(ett)); + register_dissector("link16", dissect_link16, proto_link16); +} + +/* + * Editor modelines + * + * 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: + */ |