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Track what data we got via TIS-B, report it as such.

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This commit is contained in:
Oliver Jowett 2016-01-21 19:42:37 +00:00
parent 1170ed9620
commit d9eec668cf
5 changed files with 56 additions and 21 deletions
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1
dump1090.h
View file

@ -165,6 +165,7 @@ typedef struct rtlsdr_dev rtlsdr_dev_t;
#define MODES_ACFLAGS_FROM_MLAT (1<<18) // Data was derived from multilateration
#define MODES_ACFLAGS_ALTITUDE_HAE_VALID (1<<19) // altitude_hae is valid
#define MODES_ACFLAGS_HAE_DELTA_VALID (1<<20) // hae_delta is valid
#define MODES_ACFLAGS_FROM_TISB (1<<21) // Data was derived from TIS-B messages
#define MODES_ACFLAGS_LLEITHER_VALID (MODES_ACFLAGS_LLEVEN_VALID | MODES_ACFLAGS_LLODD_VALID)
#define MODES_ACFLAGS_LLBOTH_VALID (MODES_ACFLAGS_LLEVEN_VALID | MODES_ACFLAGS_LLODD_VALID)

5
mode_s.c
View file

@ -714,6 +714,11 @@ static void decodeExtendedSquitter(struct modesMessage *mm)
// Check CF on DF18 to work out the format of the ES and whether we need to look for an IMF bit
if (mm->msgtype == 18) {
/* we just globally tag any DF18 as TIS-B,
* which is not strictly true but close enough
*/
mm->bFlags |= MODES_ACFLAGS_FROM_TISB;
switch (mm->cf) {
case 0: // ADS-B ES/NT devices that report the ICAO 24-bit address in the AA field
break;

64
net_io.c
View file

@ -879,6 +879,31 @@ static const char *jsonEscapeString(const char *str) {
return buf;
}
static char *append_flags(char *p, char *end, int flags)
{
p += sprintf(p, end-p, "[");
if (flags & MODES_ACFLAGS_SQUAWK_VALID)
p += snprintf(p, end-p, "\"squawk\",");
if (flags & MODES_ACFLAGS_CALLSIGN_VALID)
p += snprintf(p, end-p, "\"callsign\",");
if (flags & MODES_ACFLAGS_LATLON_VALID)
p += snprintf(p, end-p, "\"lat\",\"lon\",");
if (flags & MODES_ACFLAGS_ALTITUDE_VALID)
p += snprintf(p, end-p, "\"altitude\",");
if (flags & MODES_ACFLAGS_HEADING_VALID)
p += snprintf(p, end-p, "\"track\",");
if (flags & MODES_ACFLAGS_SPEED_VALID)
p += snprintf(p, end-p, "\"speed\",");
if (flags & MODES_ACFLAGS_VERTRATE_VALID)
p += snprintf(p, end-p, "\"vert_rate\",");
if (flags & MODES_ACFLAGS_CATEGORY_VALID)
p += snprintf(p, end-p, "\"category\",");
if (p[-1] != '[')
--p;
p += snprintf(p, end-p, "]");
return p;
}
char *generateAircraftJson(const char *url_path, int *len) {
uint64_t now = mstime();
struct aircraft *a;
@ -929,26 +954,12 @@ char *generateAircraftJson(const char *url_path, int *len) {
if (a->bFlags & MODES_ACFLAGS_CATEGORY_VALID)
p += snprintf(p, end-p, ",\"category\":\"%02X\"", a->category);
if (a->mlatFlags) {
p += snprintf(p, end-p, ",\"mlat\":[");
if (a->mlatFlags & MODES_ACFLAGS_SQUAWK_VALID)
p += snprintf(p, end-p, "\"squawk\",");
if (a->mlatFlags & MODES_ACFLAGS_CALLSIGN_VALID)
p += snprintf(p, end-p, "\"callsign\",");
if (a->mlatFlags & MODES_ACFLAGS_LATLON_VALID)
p += snprintf(p, end-p, "\"lat\",\"lon\",");
if (a->mlatFlags & MODES_ACFLAGS_ALTITUDE_VALID)
p += snprintf(p, end-p, "\"altitude\",");
if (a->mlatFlags & MODES_ACFLAGS_HEADING_VALID)
p += snprintf(p, end-p, "\"track\",");
if (a->mlatFlags & MODES_ACFLAGS_SPEED_VALID)
p += snprintf(p, end-p, "\"speed\",");
if (a->mlatFlags & MODES_ACFLAGS_VERTRATE_VALID)
p += snprintf(p, end-p, "\"vert_rate\",");
if (a->mlatFlags & MODES_ACFLAGS_CATEGORY_VALID)
p += snprintf(p, end-p, "\"category\",");
if (p[-1] != '[')
--p;
p += snprintf(p, end-p, "]");
p += snprintf(p, end-p, ",\"mlat\":");
p = append_flags(p, end, a->mlatFlags);
}
if (a->tisbFlags) {
p += snprintf(p, end-p, ",\"tisb\":");
p = append_flags(p, end, a->tisbFlags);
}
p += snprintf(p, end-p, ",\"messages\":%ld,\"seen\":%.1f,\"rssi\":%.1f}",
@ -1554,7 +1565,7 @@ static void modesReadFromClient(struct client *c) {
}
}
#define TSV_MAX_PACKET_SIZE 160
#define TSV_MAX_PACKET_SIZE 180
static void writeFATSV()
{
@ -1599,6 +1610,7 @@ static void writeFATSV()
char *p, *end;
int flags;
int used_tisb = 0;
// skip non-ICAO
if (a->addr & MODES_NON_ICAO_ADDRESS)
@ -1621,6 +1633,7 @@ static void writeFATSV()
alt = a->altitude;
altAge = now - a->seenAltitude;
altValid = (altAge <= 30000);
used_tisb |= (a->tisbFlags & MODES_ACFLAGS_ALTITUDE_VALID);
}
if (flags & MODES_ACFLAGS_AOG_VALID) {
@ -1633,21 +1646,26 @@ static void writeFATSV()
altAge = 0;
ground = 1;
}
used_tisb |= (a->tisbFlags & MODES_ACFLAGS_AOG_VALID);
}
if (flags & MODES_ACFLAGS_LATLON_VALID) {
latlonAge = now - a->seenLatLon;
latlonValid = (latlonAge <= 30000);
used_tisb |= (a->tisbFlags & MODES_ACFLAGS_LATLON_VALID);
}
if (flags & MODES_ACFLAGS_HEADING_VALID) {
trackAge = now - a->seenTrack;
trackValid = (trackAge <= 30000);
used_tisb |= (a->tisbFlags & MODES_ACFLAGS_HEADING_VALID);
}
if (flags & MODES_ACFLAGS_SPEED_VALID) {
speedAge = now - a->seenSpeed;
speedValid = (speedAge <= 30000);
used_tisb |= (a->tisbFlags & MODES_ACFLAGS_SPEED_VALID);
}
// don't send mode S very often
@ -1729,6 +1747,10 @@ static void writeFATSV()
useful = 1;
}
if (used_tisb) {
p += snprintf(p, bufsize(p,end), "\ttisb\t1");
}
// if we didn't get at least an alt or a speed or a latlon or
// a heading, bail out. We don't need to do anything special
// to unwind prepareWrite().

6
track.c
View file

@ -597,6 +597,12 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm)
else
a->mlatFlags = (a->mlatFlags & a->bFlags) & ~mm->bFlags;
// Same for TIS-B
if (mm->bFlags & MODES_ACFLAGS_FROM_TISB)
a->tisbFlags = (a->tisbFlags & a->bFlags) | mm->bFlags;
else
a->tisbFlags = (a->tisbFlags & a->bFlags) & ~mm->bFlags;
if (mm->msgtype == 32) {
int flags = a->modeACflags;
if ((flags & (MODEAC_MSG_MODEC_HIT | MODEAC_MSG_MODEC_OLD)) == MODEAC_MSG_MODEC_OLD) {

1
track.h
View file

@ -78,6 +78,7 @@ struct aircraft {
uint64_t seenTrack; // Time (millis) at which track was measured
int mlatFlags; // Data derived from mlat messages
int tisbFlags; // Data derived from TIS-B messages
long messages; // Number of Mode S messages received
int modeA; // Squawk