Ais6_1_0::Ais6_1_0(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), ack_required(false), msg_seq(0),
spare2(0) {
assert(dac == 1);
assert(fi == 0);
if (num_bits < 88 || num_bits > 936) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs; // TODO(schwehr): what is the real max size?
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
ack_required = bs[88];
msg_seq = bs.ToUnsignedInt(89, 11);
const size_t text_size = 6 * ((num_bits - 100) / 6);
const size_t spare2_size = num_bits - 100 - text_size;
text = bs.ToString(100, text_size);
if (!spare2_size)
spare2 = 0;
else
spare2 = bs.ToUnsignedInt(100 + text_size, spare2_size);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais6::Ais6(const char *nmea_payload, const size_t pad)
: AisMsg(nmea_payload, pad),
seq(0),
mmsi_dest(0),
retransmit(false),
spare(0),
dac(0),
fi(0) {
assert(message_id == 6);
// TODO(olafsinram): 46 or rather 56?
const int payload_len = num_bits - 46; // in bits w/o DAC/FI
if (num_bits < 88 || payload_len < 0 || payload_len > 952) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(38);
seq = bs.ToUnsignedInt(38, 2);
mmsi_dest = bs.ToUnsignedInt(40, 30);
retransmit = !bs[70];
spare = bs[71];
dac = bs.ToUnsignedInt(72, 10);
fi = bs.ToUnsignedInt(82, 6);
}
// IFM 4: Capability reply - OLD ITU 1371-4
// TODO(schwehr): WTF? 10 + 128 + 6 == 80 Is this 168 or 232 bits?
Ais6_1_4::Ais6_1_4(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), ack_dac(0), capabilities(),
cap_reserved(), spare2(0) {
assert(dac == 1);
assert(fi == 4);
// TODO(schwehr): num_bits for 6_1_4. 226 bits?
if (num_bits != 232) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
ack_dac = bs.ToUnsignedInt(88, 10);
for (size_t cap_num = 0; cap_num < 128/2; cap_num++) {
size_t start = 98 + cap_num * 2;
capabilities[cap_num] = bs[start];
cap_reserved[cap_num] = bs[start + 1];
}
// spare2 = bs.ToUnsignedInt(226, 6); // OR NOT
// TODO(schwehr): add in the offset of the dest mmsi
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO 1371-5 Ack
Ais6_1_5::Ais6_1_5(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), ack_dac(0), ack_fi(0), seq_num(0),
ai_available(false), ai_response(0), spare(0) {
assert(dac == 1);
assert(fi == 5);
if (num_bits != 168) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
ack_dac = bs.ToUnsignedInt(88, 10);
ack_fi = bs.ToUnsignedInt(98, 6);
seq_num = bs.ToUnsignedInt(104, 11);
ai_available = static_cast<bool>(bs[115]);
ai_response = bs.ToUnsignedInt(116, 3);
spare = bs.ToUnsignedInt(119, 49);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais6_1_1::Ais6_1_1(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), ack_dac(0), msg_seq(0), spare2(0) {
assert(dac == 1);
assert(fi == 1);
if (num_bits != 112) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
ack_dac = bs.ToUnsignedInt(88, 10);
msg_seq = bs.ToUnsignedInt(98, 11);
spare2 = bs.ToUnsignedInt(109, 3);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Dangerous cargo
// See also Circ 236
Ais6_1_12::Ais6_1_12(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), utc_month_dep(0), utc_day_dep(0),
utc_hour_dep(0), utc_min_dep(0), utc_month_next(0),
utc_day_next(0), utc_hour_next(0), utc_min_next(0),
un(0), value(0), value_unit(0), spare2(0) {
assert(dac == 1);
assert(fi == 12);
if (num_bits != 360) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
// TODO(schwehr): add in the offset of the dest mmsi
#if 0
bs.SeekTo(56);
last_port = bs.ToString(56, 30);
utc_month_dep = bs.ToUnsignedInt(86, 4);
utc_day_dep = bs.ToUnsignedInt(90, 5);
utc_hour_dep = bs.ToUnsignedInt(95, 5);
utc_min_dep = bs.ToUnsignedInt(100, 6);
next_port = bs.ToString(106, 30);
utc_month_next = bs.ToUnsignedInt(136, 4); // estimated arrival
utc_day_next = bs.ToUnsignedInt(140, 5);
utc_hour_next = bs.ToUnsignedInt(145, 5);
utc_min_next = bs.ToUnsignedInt(150, 6);
main_danger = bs.ToString(156, 120);
imo_cat = bs.ToString(276, 24);
un = bs.ToUnsignedInt(300, 13);
value = bs.ToUnsignedInt(313, 10); // TODO(schwehr): units
value_unit = bs.ToUnsignedInt(323, 2);
spare = bs.ToUnsignedInt(325, 3);
// 360
#endif
// TODO(schwehr): Add assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Tidal Window
// See also Circ 236
Ais6_1_14::Ais6_1_14(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), utc_month(0), utc_day(0) {
// TODO(schwehr): untested - no sample of the correct length yet
assert(dac == 1);
assert(fi == 14);
if (num_bits != 376) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
utc_month = bs.ToUnsignedInt(88, 4);
utc_day = bs.ToUnsignedInt(92, 5);
for (size_t window_num = 0; window_num < 3; window_num++) {
Ais6_1_14_Window w;
const size_t start = 97 + window_num * 93;
// Reversed order for lng/lat.
float y = bs.ToInt(start, 27) / 600000.;
float x = bs.ToInt(start + 27, 28) / 600000.;
w.position = AisPoint(x, y);
w.utc_hour_from = bs.ToUnsignedInt(start + 55, 5);
w.utc_min_from = bs.ToUnsignedInt(start + 60, 6);
w.utc_hour_to = bs.ToUnsignedInt(start + 66, 5);
w.utc_min_to = bs.ToUnsignedInt(start + 71, 6);
w.cur_dir = bs.ToUnsignedInt(start + 77, 9);
w.cur_speed = bs.ToUnsignedInt(start + 86, 7) / 10.;
windows.push_back(w);
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Berthing data
Ais6_1_20::Ais6_1_20(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), link_id(0), length(0), depth(0.0),
mooring_position(0), utc_month(0), utc_day(0), utc_hour(0), utc_min(0),
services_known(false), services() {
assert(dac == 1);
assert(fi == 20);
if (num_bits != 360) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
link_id = bs.ToUnsignedInt(88, 10);
length = bs.ToUnsignedInt(98, 9);
depth = bs.ToUnsignedInt(107, 8);
mooring_position = bs.ToUnsignedInt(115, 3);
utc_month = bs.ToUnsignedInt(118, 4);
utc_day = bs.ToUnsignedInt(122, 5);
utc_hour = bs.ToUnsignedInt(127, 5);
utc_min = bs.ToUnsignedInt(132, 6);
services_known = bs[138];
for (size_t serv_num = 0; serv_num < 26; serv_num++) {
// TODO(schwehr): const int val = bs.ToUnsignedInt(139 + 2*serv_num, 2);
services[serv_num]
= static_cast<int>(bs.ToUnsignedInt(139 + 2*serv_num, 2));
}
name = bs.ToString(191, 120);
position = bs.ToAisPoint(311, 49);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// http://www.e-navigation.nl/content/monitoring-aids-navigation
Ais6_0_0::Ais6_0_0(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad),
sub_id(1),
voltage(0.0),
current(0.0),
dc_power_supply(true),
light_on(true),
battery_low(false),
off_position(false),
spare2(0) {
assert(dac == 0);
assert(fi == 0);
if (num_bits != 136) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
sub_id = bs.ToUnsignedInt(88, 16);
voltage = bs.ToUnsignedInt(104, 12) / 10.0;
current = bs.ToUnsignedInt(116, 10) / 10.0;
dc_power_supply = bs[126];
light_on = bs[127];
battery_low = bs[128];
off_position = bs[129];
spare2 = bs.ToUnsignedInt(130, 6);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Tidal window
// See also Circ 236
Ais6_1_32::Ais6_1_32(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), utc_month(0), utc_day(0) {
assert(dac == 1);
assert(fi == 32);
// TODO(schwehr): might get messages with not all windows
if (num_bits != 350) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
utc_month = bs.ToUnsignedInt(88, 4);
utc_day = bs.ToUnsignedInt(92, 5);
for (size_t window_num = 0; window_num < 3; window_num++) {
Ais6_1_32_Window w;
const size_t start = 97 + 88*window_num;
w.position = bs.ToAisPoint(start, 49);
w.from_utc_hour = bs.ToUnsignedInt(start + 49, 5);
w.from_utc_min = bs.ToUnsignedInt(start + 54, 6);
w.to_utc_hour = bs.ToUnsignedInt(start + 60, 5);
w.to_utc_min = bs.ToUnsignedInt(start + 65, 6);
w.cur_dir = bs.ToUnsignedInt(start + 71, 9);
w.cur_speed = bs.ToUnsignedInt(start + 80, 8) / 10.;
windows.push_back(w);
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IFM 40: people on board - OLD ITU 1371-4
Ais6_1_40::Ais6_1_40(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), persons(0), spare2(0) {
assert(dac == 1);
assert(fi == 40);
if (num_bits != 104) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
persons = bs.ToUnsignedInt(88, 13);
spare2 = bs.ToUnsignedInt(101, 3);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais6_1_2::Ais6_1_2(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), req_dac(0), req_fi(0) {
assert(dac == 1);
assert(fi == 2);
if (num_bits != 104) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
req_dac = bs.ToUnsignedInt(88, 10);
req_fi = bs.ToUnsignedInt(98, 6);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais23::Ais23(const char *nmea_payload, const size_t pad)
: AisMsg(nmea_payload, pad), spare(0), station_type(0), type_and_cargo(0),
spare2(3), txrx_mode(0), interval_raw(0), quiet(0), spare3(0) {
assert(message_id == 23);
if (pad != 2 || num_chars != 27) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(38);
spare = bs.ToUnsignedInt(38, 2);
position1 = bs.ToAisPoint(40, 35);
position2 = bs.ToAisPoint(75, 35);
station_type = bs.ToUnsignedInt(110, 4);
type_and_cargo = bs.ToUnsignedInt(114, 8);
spare2 = bs.ToUnsignedInt(122, 22);
txrx_mode = bs.ToUnsignedInt(144, 2);
interval_raw = bs.ToUnsignedInt(146, 4);
quiet = bs.ToUnsignedInt(150, 4);
spare3 = bs.ToUnsignedInt(154, 6);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Dangerous cargo indication 2
// See also Circ 236
Ais6_1_25::Ais6_1_25(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), amount_unit(0), amount(0) {
assert(dac == 1);
assert(fi == 25);
// TODO(schwehr): verify multiple of the size of cargos + header
// or padded to a slot boundary
// Allowing a message with no payloads
// TODO(schwehr): (num_bits - 100) % 17 != 0) is okay
if (num_bits < 100 || num_bits > 576) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
if ((num_bits - 100) % 17 != 0) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
amount_unit = bs.ToUnsignedInt(88, 2);
amount = bs.ToUnsignedInt(90, 10);
const size_t total_cargos = static_cast<int>(floor((num_bits - 100) / 17.));
for (size_t cargo_num = 0; cargo_num < total_cargos; cargo_num++) {
Ais6_1_25_Cargo cargo;
const size_t start = 100 + 17*cargo_num;
cargo.code_type = bs.ToUnsignedInt(start, 4);
// TODO(schwehr): Is this the correct behavior?
switch (cargo.code_type) {
// No 0
case 1: // IMDG Code in packed form
cargo.imdg = bs.ToUnsignedInt(start + 4, 7);
cargo.imdg_valid = true;
cargo.spare = bs.ToUnsignedInt(start + 11, 6);
cargo.spare_valid = true;
break;
case 2: // IGC Code
cargo.un = bs.ToUnsignedInt(start + 4, 13);
cargo.un_valid = true;
break;
case 3: // BC Code
cargo.bc = bs.ToUnsignedInt(start + 4, 3);
cargo.bc_valid = true;
cargo.imdg = bs.ToUnsignedInt(start + 7, 7);
cargo.imdg_valid = true;
cargo.spare = bs.ToUnsignedInt(start + 14, 3);
cargo.spare_valid = true;
break;
case 4: // MARPOL Annex I
cargo.marpol_oil = bs.ToUnsignedInt(start + 4, 4);
cargo.marpol_oil_valid = true;
cargo.spare = bs.ToUnsignedInt(start + 8, 9);
cargo.spare_valid = true;
break;
case 5: // MARPOL Annex II IBC
cargo.marpol_cat = bs.ToUnsignedInt(start + 4, 3);
cargo.marpol_cat_valid = true;
cargo.spare = bs.ToUnsignedInt(start + 7, 10);
cargo.spare_valid = true;
break;
// 6: Regional use
// 7: 7-15 reserved for future
default:
break; // Just push in an all blank record?
}
cargos.push_back(cargo);
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais18::Ais18(const char *nmea_payload, const size_t pad)
: AisMsg(nmea_payload, pad),
spare(0),
sog(0.0),
position_accuracy(0),
cog(0.0),
true_heading(0),
timestamp(0),
spare2(0),
unit_flag(0),
display_flag(0),
dsc_flag(0),
band_flag(0),
m22_flag(0),
mode_flag(0),
raim(false),
commstate_flag(0),
sync_state(0),
slot_timeout_valid(false),
slot_timeout(0),
received_stations_valid(false),
received_stations(0),
slot_number_valid(false),
slot_number(0),
utc_valid(false),
utc_hour(0),
utc_min(0),
utc_spare(0),
slot_offset_valid(false),
slot_offset(0),
slot_increment_valid(false),
slot_increment(0),
slots_to_allocate_valid(false),
slots_to_allocate(0),
keep_flag_valid(false),
keep_flag(0),
commstate_cs_fill_valid(false),
commstate_cs_fill(0) {
assert(message_id == 18);
if (pad != 0 || num_chars != 28) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(38);
spare = bs.ToUnsignedInt(38, 8);
sog = bs.ToUnsignedInt(46, 10) / 10.;
position_accuracy = bs[56];
position = bs.ToAisPoint(57, 55);
cog = bs.ToUnsignedInt(112, 12) / 10.;
true_heading = bs.ToUnsignedInt(124, 9);
timestamp = bs.ToUnsignedInt(133, 6);
spare2 = bs.ToUnsignedInt(139, 2);
unit_flag = bs[141];
display_flag = bs[142];
dsc_flag = bs[143];
band_flag = bs[144];
m22_flag = bs[145];
mode_flag = bs[146];
raim = bs[147];
commstate_flag = bs[148]; // 0 SOTDMA, 1 ITDMA
if (unit_flag == 0) {
sync_state = bs.ToUnsignedInt(149, 2);
if (commstate_flag == 0) {
// SOTDMA
slot_timeout = bs.ToUnsignedInt(151, 3);
slot_timeout_valid = true;
switch (slot_timeout) {
case 0:
slot_offset = bs.ToUnsignedInt(154, 14);
slot_offset_valid = true;
break;
case 1:
utc_hour = bs.ToUnsignedInt(154, 5);
utc_min = bs.ToUnsignedInt(159, 7);
utc_spare = bs.ToUnsignedInt(166, 2);
utc_valid = true;
break;
case 2: // FALLTHROUGH
case 4: // FALLTHROUGH
case 6:
slot_number = bs.ToUnsignedInt(154, 14);
slot_number_valid = true;
break;
case 3: // FALLTHROUGH
case 5: // FALLTHROUGH
case 7:
received_stations = bs.ToUnsignedInt(154, 14);
received_stations_valid = true;
break;
default:
assert(false);
}
} else {
// ITDMA
slot_increment = bs.ToUnsignedInt(151, 13);
slot_increment_valid = true;
slots_to_allocate = bs.ToUnsignedInt(164, 3);
slots_to_allocate_valid = true;
keep_flag = bs[167];
keep_flag_valid = true;
}
} else {
// Carrier Sense (CS) with unit_flag of 1.
commstate_cs_fill = bs.ToUnsignedInt(149, 19);
commstate_cs_fill_valid = true;
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}