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Don't use ADSB messages with undefined fields in navigator (#8900)

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Don't use ADSB messages with undefined fields in navigator
This commit is contained in:
Vasily Evseenko
2018-02-18 11:08:40 +01:00
committed by Lorenz Meier
parent a1f660119c
commit 135162522a
5 changed files with 61 additions and 6 deletions
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src/modules/navigator/navigator_main.cpp
+21 -4
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@@ -963,7 +963,10 @@ void Navigator::fake_traffic(const char *callsign, float distance, float directi
strncpy(&tr.callsign[0], callsign, sizeof(tr.callsign));
tr.emitter_type = 0; // Type from ADSB_EMITTER_TYPE enum
tr.tslc = 2; // Time since last communication in seconds
tr.flags = 0; // Flags to indicate various statuses including valid data fields
tr.flags = transponder_report_s::PX4_ADSB_FLAGS_VALID_COORDS | transponder_report_s::PX4_ADSB_FLAGS_VALID_HEADING |
transponder_report_s::PX4_ADSB_FLAGS_VALID_VELOCITY |
transponder_report_s::PX4_ADSB_FLAGS_VALID_ALTITUDE |
transponder_report_s::PX4_ADSB_FLAGS_VALID_CALLSIGN; // Flags to indicate various statuses including valid data fields
tr.squawk = 6667;
orb_advert_t h = orb_advertise_queue(ORB_ID(transponder_report), &tr, transponder_report_s::ORB_QUEUE_LENGTH);
@@ -993,10 +996,20 @@ void Navigator::check_traffic()
transponder_report_s tr;
orb_copy(ORB_ID(transponder_report), _traffic_sub, &tr);
uint16_t required_flags = transponder_report_s::PX4_ADSB_FLAGS_VALID_COORDS |
transponder_report_s::PX4_ADSB_FLAGS_VALID_HEADING |
transponder_report_s::PX4_ADSB_FLAGS_VALID_VELOCITY | transponder_report_s::PX4_ADSB_FLAGS_VALID_ALTITUDE;
if ((tr.flags & required_flags) != required_flags) {
orb_check(_traffic_sub, &changed);
continue;
}
float d_hor, d_vert;
get_distance_to_point_global_wgs84(lat, lon, alt,
tr.lat, tr.lon, tr.altitude, &d_hor, &d_vert);
// predict final altitude (positive is up) in prediction time frame
float end_alt = tr.altitude + (d_vert / tr.hor_velocity) * tr.ver_velocity;
@@ -1031,18 +1044,22 @@ void Navigator::check_traffic()
case 0: {
/* ignore */
PX4_WARN("TRAFFIC %s, hdg: %d", tr.callsign, traffic_direction);
PX4_WARN("TRAFFIC %s, hdg: %d", tr.flags & transponder_report_s::PX4_ADSB_FLAGS_VALID_CALLSIGN ? tr.callsign :
"unknown",
traffic_direction);
break;
}
case 1: {
mavlink_log_critical(&_mavlink_log_pub, "WARNING TRAFFIC %s at heading %d, land immediately", tr.callsign,
mavlink_log_critical(&_mavlink_log_pub, "WARNING TRAFFIC %s at heading %d, land immediately",
tr.flags & transponder_report_s::PX4_ADSB_FLAGS_VALID_CALLSIGN ? tr.callsign : "unknown",
traffic_direction);
break;
}
case 2: {
mavlink_log_critical(&_mavlink_log_pub, "AVOIDING TRAFFIC %s heading %d, returning home", tr.callsign,
mavlink_log_critical(&_mavlink_log_pub, "AVOIDING TRAFFIC %s heading %d, returning home",
tr.flags & transponder_report_s::PX4_ADSB_FLAGS_VALID_CALLSIGN ? tr.callsign : "unknown",
traffic_direction);
// set the return altitude to minimum