aircraft.c

#include "readsb.h"

static inline uint32_t dbHash(uint32_t addr) {
    return addrHash(addr, DB_HASH_BITS);
}

static inline uint32_t aircraftHash(uint32_t addr) {
    return addrHash(addr, AIRCRAFT_HASH_BITS);
}

#define EMPTY 0xFFFFFFFF
#define quickMinBits 8
#define quickMaxBits 16
#define quickStride 8
static int quickBits;
static int quickBuckets;
static int quickSize;

struct ap {
    uint32_t addr;
    struct aircraft *ptr;
};

static struct ap *quick;

static void quickResize(int bits) {
    quickBits = bits;
    quickBuckets = (1LL << bits) + quickStride;
    quickSize = sizeof(struct ap) * quickBuckets;

    if (quickBuckets > 256000)
        fprintf(stderr, "quickLookup: changing size to %d!\n", (int) quickBuckets);

    sfree(quick);
    quick = malloc(quickSize);
    memset(quick, 0xFF, quickSize);
}

static struct ap *quickGet(uint32_t addr) {
    uint32_t hash = addrHash(addr, quickBits);
    for (unsigned i = 0; i < quickStride; i++) {
        struct ap *q = &(quick[hash + i]);
        if (q->addr == addr) {
            return q;
        }
    }
    return NULL;
}
void quickRemove(struct aircraft *a) {
    struct ap *q = quickGet(a->addr);
    if (q) {
        q->addr = EMPTY;
        q->ptr = NULL;
    }
    //fprintf(stderr, "r: %06x\n", a->addr);
}
void quickAdd(struct aircraft *a) {
    struct ap *q = quickGet(a->addr);
    if (q)
        return;

    uint32_t hash = addrHash(a->addr, quickBits);

    for (unsigned i = 0; i < quickStride; i++) {
        q = &quick[hash + i];
        if (q->addr == EMPTY) {
            q->addr = a->addr;
            q->ptr = a;
            return;
        }
    }
}

void quickInit() {
    if (quickBits > quickMinBits && Modes.aircraftActive.len < quickBuckets / 9) {
        quickResize(quickBits - 1);
    } else if (quickBits < quickMinBits) {
        quickResize(quickMinBits);
    } else if (quickBits < quickMaxBits && Modes.aircraftActive.len > quickBuckets / 3) {
        quickResize(quickBits + 1);
    }

    /*
    for (int i = 0; i < quickBuckets; i++) {
        if (quick[i].addr == EMPTY)
            fprintf(stderr, " ");
        else
            fprintf(stderr, ".");
    }
    fprintf(stderr, "\n");
    */
}
void quickDestroy() {
    sfree(quick);
}


struct aircraft *aircraftGet(uint32_t addr) {

    struct ap *q = quickGet(addr);
    if (q) {
        return q->ptr;
    }

    struct aircraft *a = Modes.aircraft[aircraftHash(addr)];

    while (a && a->addr != addr) {
        a = a->next;
    }
    if (a) {
        quickAdd(a);
    }
    return a;
}

void freeAircraft(struct aircraft *a) {
    quickRemove(a);
    traceCleanup(a);
    free(a);
}

struct aircraft *aircraftCreate(uint32_t addr) {
    struct aircraft *a = aircraftGet(addr);
    if (a)
        return a;
    a = malloc(sizeof(struct aircraft));

    // Default everything to zero/NULL
    memset(a, 0, sizeof (struct aircraft));

    a->size_struct_aircraft = sizeof(struct aircraft);

    // Now initialise things that should not be 0/NULL to their defaults
    a->addr = addr;
    a->addrtype = ADDR_UNKNOWN;

    // defaults until we see a message otherwise
    a->adsb_version = -1;
    a->adsb_hrd = HEADING_MAGNETIC;
    a->adsb_tah = HEADING_GROUND_TRACK;

    if (Modes.json_globe_index) {
        a->globe_index = -5;
    }

    // initialize data validity ages
    //adjustExpire(a, 58);
    Modes.stats_current.unique_aircraft++;

    updateTypeReg(a);

    uint32_t hash = aircraftHash(addr);
    a->next = Modes.aircraft[hash];
    Modes.aircraft[hash] = a;

    return a;
}

void toBinCraft(struct aircraft *a, struct binCraft *new, uint64_t now) {

    memset(new, 0, sizeof(struct binCraft));
    new->hex = a->addr;
    new->seen = (now - a->seen) / 100.0;

    new->callsign_valid = trackDataValid(&a->callsign_valid);
    for (unsigned i = 0; i < sizeof(new->callsign); i++)
        new->callsign[i] = a->callsign[i] * new->callsign_valid;

    if (Modes.db) {
        memcpy(new->registration, a->registration, sizeof(new->registration));
        memcpy(new->typeCode, a->typeCode, sizeof(new->typeCode));
        new->dbFlags = a->dbFlags;
    }
    new->extraFlags |= ((a->nogpsCounter >= NOGPS_SHOW) << 0);

    new->messages = (uint16_t) a->messages;

    new->position_valid = posReliable(a);

    if (new->position_valid) {
        new->seen_pos = (now - a->seen_pos) / 100.0;
        new->lat = (int32_t) nearbyint(a->lat * 1E6);
        new->lon = (int32_t) nearbyint(a->lon * 1E6);
        new->pos_nic = a->pos_nic;
        new->pos_rc = a->pos_rc;
    } else if (now < a->seenPosReliable + 14 * 24 * HOURS) {
        new->seen_pos = (now - a->seenPosReliable) / 100.0;
        new->lat = (int32_t) nearbyint(a->latReliable * 1E6);
        new->lon = (int32_t) nearbyint(a->lonReliable * 1E6);
        new->pos_nic = a->pos_nic_reliable;
        new->pos_rc = a->pos_rc_reliable;
    }

    new->altitude_baro_valid = altReliable(a);

    new->altitude_baro = (int16_t) nearbyint(a->altitude_baro / 25.0);

    new->altitude_geom = (int16_t) nearbyint(a->altitude_geom / 25.0);
    new->baro_rate = (int16_t) nearbyint(a->baro_rate / 8.0);
    new->geom_rate = (int16_t) nearbyint(a->geom_rate / 8.0);
    new->ias = a->ias;
    new->tas = a->tas;

    new->squawk = a->squawk;
    new->category = a->category * (now < a->category_updated + Modes.trackExpireJaero);
    // Aircraft category A0 - D7 encoded as a single hex byte. 00 = unset
    new->nav_altitude_mcp = (uint16_t) nearbyint(a->nav_altitude_mcp / 4.0);
    new->nav_altitude_fms = (uint16_t) nearbyint(a->nav_altitude_fms / 4.0);

    new->nav_qnh = (int16_t) nearbyint(a->nav_qnh * 10.0);
    new->gs = (int16_t) nearbyint(a->gs * 10.0);
    new->mach = (int16_t) nearbyint(a->mach * 1000.0);

    new->track_rate = (int16_t) nearbyint(a->track_rate * 100.0);
    new->roll = (int16_t) nearbyint(a->roll * 100.0);

    if (trackDataValid(&a->track_valid))
        new->track = (int16_t) nearbyint(a->track * 90.0);
    else
        new->track = (int16_t) nearbyint(a->calc_track * 90.0);

    new->mag_heading = (int16_t) nearbyint(a->mag_heading * 90.0);
    new->true_heading = (int16_t) nearbyint(a->true_heading * 90.0);
    new->nav_heading = (int16_t) nearbyint(a->nav_heading * 90.0);

    new->emergency = a->emergency;
    new->airground = a->airground * trackDataValid(&a->airground_valid);

    new->addrtype = a->addrtype;
    new->nav_modes = a->nav_modes;
    new->nav_altitude_src = a->nav_altitude_src;
    new->sil_type = a->sil_type;

    new->wind_valid = (now < a->wind_updated + TRACK_EXPIRE && abs(a->wind_altitude - a->altitude_baro) < 500);
    new->wind_direction = (int) nearbyint(a->wind_direction) * new->wind_valid;
    new->wind_speed = (int) nearbyint(a->wind_speed) * new->wind_valid;

    new->temp_valid = (now < a->oat_updated + TRACK_EXPIRE);
    new->oat = (int) nearbyint(a->oat) * new->temp_valid;
    new->tat = (int) nearbyint(a->tat) * new->temp_valid;

    if (a->adsb_version < 0)
        new->adsb_version = 15;
    else
        new->adsb_version = a->adsb_version;

    if (a->adsr_version < 0)
        new->adsr_version = 15;
    else
        new->adsr_version = a->adsr_version;

    if (a->tisb_version < 0)
        new->tisb_version = 15;
    else
        new->tisb_version = a->tisb_version;

    new->nic_a = a->nic_a;
    new->nic_c = a->nic_c;
    new->nic_baro = a->nic_baro;
    new->nac_p = a->nac_p;
    new->nac_v = a->nac_v;
    new->sil = a->sil;
    new->gva = a->gva;
    new->sda = a->sda;
    new->alert = a->alert;
    new->spi = a->spi;

    new->signal = get8bitSignal(a);

    if (Modes.json_globe_index) {
        if (a->position_valid.source == SOURCE_MLAT) {
            new->receiverCount = a->receiverCountMlat;
        } else {
            uint16_t *set1 = a->receiverIds;
            uint16_t set2[16] = { 0 };
            int div = 0;
            for (int k = 0; k < RECEIVERIDBUFFER; k++) {
                int unequal = 0;
                for (int j = 0; j < div; j++) {
                    unequal += (set1[k] != set2[j]);
                }
                if (unequal == div && set1[k])
                    set2[div++] = set1[k];
            }
            new->receiverCount = div;
        }
    }
#define F(f) do { new->f##_valid = trackDataValid(&a->f##_valid); new->f *= new->f##_valid; } while (0)
    F(altitude_geom);
    F(gs);
    F(ias);
    F(tas);
    F(mach);
    F(track);
    F(track_rate);
    F(roll);
    F(mag_heading);
    F(true_heading);
    F(baro_rate);
    F(geom_rate);
    F(nic_a);
    F(nic_c);
    F(nic_baro);
    F(nac_p);
    F(nac_v);
    F(sil);
    F(gva);
    F(sda);
    F(squawk);
    F(emergency);
    F(nav_qnh);
    F(nav_altitude_mcp);
    F(nav_altitude_fms);
    F(nav_altitude_src);
    F(nav_heading);
    F(nav_modes);
    F(alert);
    F(spi);
#undef F
}

// rudimentary sanitization so the json output hopefully won't be invalid
static inline void sanitize(char *str, unsigned len) {
    unsigned char b2 = (1<<7) + (1<<6); // 2 byte code or more
    unsigned char b3 = (1<<7) + (1<<6) + (1<<5); // 3 byte code or more
    unsigned char b4 = (1<<7) + (1<<6) + (1<<5) + (1<<4); // 4 byte code

    if (len >= 3 && (str[len - 3] & b4) == b4) {
        //fprintf(stderr, "%c\n", str[len - 3]);
        str[len - 3] = '\0';
    }
    if (len >= 2 && (str[len - 2] & b3) == b3) {
        //fprintf(stderr, "%c\n", str[len - 2]);
        str[len - 2] = '\0';
    }
    if (len >= 1 && (str[len - 1] & b2) == b2) {
        //fprintf(stderr, "%c\n", str[len - 1]);
        str[len - 1] = '\0';
    }
    char *p = str;
    while(p < str + len && *p) {
        if (*p == '"')
            *p = '\'';
        if (*p > 0 && *p < 0x1f)
            *p = ' ';
        p++;
    }
    if (p - 1 >= str && *(p - 1) == '\\') {
        *(p - 1) = '\0';
    }
}
static char *sprintDB(char *p, char *end, dbEntry *d) {
    p = safe_snprintf(p, end, "\n\"%s%06x\":{", (d->addr & MODES_NON_ICAO_ADDRESS) ? "~" : "", d->addr & 0xFFFFFF);
    char *regInfo = p;
    if (d->registration[0])
        p = safe_snprintf(p, end, "\"r\":\"%.*s\",", (int) sizeof(d->registration), d->registration);
    if (d->typeCode[0])
        p = safe_snprintf(p, end, "\"t\":\"%.*s\",", (int) sizeof(d->typeCode), d->typeCode);
    if (d->typeLong[0])
        p = safe_snprintf(p, end, "\"desc\":\"%.*s\",", (int) sizeof(d->typeLong), d->typeLong);
    if (d->dbFlags)
        p = safe_snprintf(p, end, "\"dbFlags\":%u,", d->dbFlags);
    if (d->ownOp[0])
        p = safe_snprintf(p, end, "\"ownOp\":\"%.*s\",", (int) sizeof(d->ownOp), d->ownOp);
    if (d->year[0])
        p = safe_snprintf(p, end, "\"year\":\"%.*s\",", (int) sizeof(d->year), d->year);
    if (p == regInfo)
        p = safe_snprintf(p, end, "\"noRegData\":true,");
    if (*(p-1) == ',')
        p--;
    p = safe_snprintf(p, end, "},");
    return p;
}
static void dbToJson() {
    size_t buflen = 32 * 1024 * 1024;
    char *buf = (char *) malloc(buflen), *p = buf, *end = buf + buflen;
    p = safe_snprintf(p, end, "{");

    for (int j = 0; j < DB_BUCKETS; j++) {
        for (dbEntry *d = Modes.db2Index[j]; d; d = d->next) {
            p = sprintDB(p, end, d);
            if ((p + 1000) >= end) {
                int used = p - buf;
                buflen *= 2;
                buf = (char *) realloc(buf, buflen);
                p = buf + used;
                end = buf + buflen;
            }
        }
    }

    if (*(p-1) == ',')
        p--;
    p = safe_snprintf(p, end, "\n}");
    struct char_buffer cb2;
    cb2.len = p - buf;
    cb2.buffer = buf;
    writeJsonToFile(Modes.json_dir, "db.json", cb2); // location changed
}

// get next CSV token based on the assumption eot points to the previous delimiter
static inline int nextToken(char delim, char **sot, char **eot, char **eol) {
    *sot = *eot + 1;
    if (*sot >= *eol)
        return 0;
    *eot = memchr(*sot, delim, *eol - *sot);

    if (!*eot)
        return 0;

    **eot = '\0';
    return 1;
}

// meant to be used with this DB: https://raw.githubusercontent.com/wiedehopf/tar1090-db/csv/aircraft.csv.gz
int dbUpdate() {
    gzFile gzfp = NULL;
    struct char_buffer cb = {0};
    char *filename = Modes.db_file;
    if (!filename || !strlen(filename) || !strcmp(filename, "none"))
        return 0;
    int fd = open(filename, O_RDONLY);
    if (fd == -1) {
        fprintf(stderr, "dbUpdate: open db-file failed:");
        perror(filename);
        return 0;
    }

    struct stat fileinfo = {0};
    if (fstat(fd, &fileinfo)) {
        fprintf(stderr, "%s: dbUpdate: fstat failed, wat?!\n", filename);
        goto DBU0;
    }
    uint64_t modTime = fileinfo.st_mtim.tv_sec;

    if (Modes.dbModificationTime == modTime)
        goto DBU0;

    gzfp = gzdopen(fd, "r");
    if (!gzfp) {
        fprintf(stderr, "db update error: gzdopen failed.\n");
        goto DBU0;
    }


    cb = readWholeGz(gzfp, filename);
    if (!cb.buffer) {
        fprintf(stderr, "readWholeGz failed.\n");
        goto DBU0;
    }
    if (cb.len < 1000) {
        fprintf(stderr, "database file very small, bailing out of dbUpdate.\n");
        goto DBU0;
    }

    int alloc = 0;
    for (uint32_t i = 0; i < cb.len; i++) {
        if (cb.buffer[i] == '\n')
            alloc++;
    }
    Modes.db2 = malloc(alloc * sizeof(dbEntry));
    Modes.db2Index = calloc(DB_BUCKETS, sizeof(void*));

    if (!Modes.db2 || !Modes.db2Index) {
        fprintf(stderr, "db update error: malloc failure!\n");
        goto DBU0;
    }

    char *eob = cb.buffer + cb.len;
    char *sol = cb.buffer;
    char *eol;
    int i;
    for (i = 0; eob > sol && (eol = memchr(sol, '\n', eob - sol)); sol = eol + 1) {

        char *sot;
        char *eot = sol - 1; // this pointer must not be dereferenced, nextToken will increment it.

        dbEntry *curr = &Modes.db2[i];
        memset(curr, 0, sizeof(dbEntry));

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        curr->addr = strtol(sot, NULL, 16);
        if (curr->addr == 0)
            continue;


#define copyDetail(d) do { memcpy(curr->d , sot, min(sizeof(curr->d ), eot - sot)); sanitize(curr->d , sizeof(curr->d )); } while (0)

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        copyDetail(registration);

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        copyDetail(typeCode);

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        for (int j = 0; j < 8 * (int) sizeof(curr->dbFlags) && sot < eot; j++, sot++)
            curr->dbFlags |= ((*sot == '1') << j);


        if (!nextToken(';', &sot, &eot, &eol)) continue;
        copyDetail(typeLong);

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        copyDetail(year);

        if (!nextToken(';', &sot, &eot, &eol)) continue;
        copyDetail(ownOp);

#undef copyDetail

        if (false) // debugging output
            fprintf(stdout, "%06X;%.12s;%.4s;%c%c;%.54s\n",
                    curr->addr,
                    curr->registration,
                    curr->typeCode,
                    curr->dbFlags & 1 ? '1' : '0',
                    curr->dbFlags & 2 ? '1' : '0',
                    curr->typeLong);

        i++; // increment db array index
        // add to hashtable
        dbPut(curr->addr, Modes.db2Index, curr);
    }

    if (i < 1) {
        fprintf(stderr, "db update error: DB has no entries, maybe old / incorrect format?!\n");
        goto DBU0;
    }
    //fflush(stdout);

    gzclose(gzfp);
    free(cb.buffer);
    Modes.dbModificationTime = modTime;
    if (Modes.json_dir) {
        writeJsonToFile(Modes.json_dir, "receiver.json", generateReceiverJson());
    }
    return 1;
DBU0:
    if (gzfp)
        gzclose(gzfp);
    free(cb.buffer);
    free(Modes.db2);
    free(Modes.db2Index);
    Modes.db2 = NULL;
    Modes.db2Index = NULL;
    close(fd);
    return 0;
}

int dbFinishUpdate() {
    // finish db update
    if (Modes.db2 && Modes.db2Index) {
        if (Modes.json_dir && Modes.debug_dbJson)
            dbToJson();
        free(Modes.dbIndex);
        free(Modes.db);
        Modes.dbIndex = Modes.db2Index;
        Modes.db = Modes.db2;
        Modes.db2Index = NULL;
        Modes.db2 = NULL;

        for (int j = 0; j < AIRCRAFT_BUCKETS; j++) {
            for (struct aircraft *a = Modes.aircraft[j]; a; a = a->next) {
                updateTypeReg(a);
            }
        }
        fprintf(stderr, "Database update done!\n");
        return 1;
    }
    return 0;
}


dbEntry *dbGet(uint32_t addr, dbEntry **index) {
    if (!index)
        return NULL;
    dbEntry *d = index[dbHash(addr)];

    while (d && d->addr != addr) {
        d = d->next;
    }
    return d;
}

void dbPut(uint32_t addr, dbEntry **index, dbEntry *d) {
    uint32_t hash = dbHash(addr);
    d->next = index[hash];
    index[hash] = d;
}

void updateTypeReg(struct aircraft *a) {
    dbEntry *d = dbGet(a->addr, Modes.dbIndex);
    if (d) {
        memcpy(a->registration, d->registration, sizeof(a->registration));
        memcpy(a->typeCode, d->typeCode, sizeof(a->typeCode));
        memcpy(a->typeLong, d->typeLong, sizeof(a->typeLong));
        a->dbFlags = d->dbFlags;
    } else {
        memset(a->registration, 0, sizeof(a->registration));
        memset(a->typeCode, 0, sizeof(a->typeCode));
        memset(a->typeLong, 0, sizeof(a->typeLong));
        a->dbFlags = 0;
    }
    uint32_t i = a->addr;
    if (
            false
            // us military
            //adf7c8-adf7cf = united states mil_5(uf)
            //adf7d0-adf7df = united states mil_4(uf)
            //adf7e0-adf7ff = united states mil_3(uf)
            //adf800-adffff = united states mil_2(uf)
            //ae0000-afffff = united states mil_1(uf)
            || (i >= 0xadf7c8 && i <= 0xafffff)

            //010070-01008f = egypt_mil
            || (i >= 0x010070 && i <= 0x01008f)

            //0a4000-0a4fff = algeria mil(ap)
            || (i >= 0x0a4000 && i <= 0x0a4fff)

            //33ff00-33ffff = italy mil(iy)
            || (i >= 0x33ff00 && i <= 0x33ffff)

            //350000-37ffff = spain mil(sp)
            || (i >= 0x350000 && i <= 0x37ffff)

            //3a8000-3affff = france mil_1(fs)
            || (i >= 0x3a8000 && i <= 0x3affff)
            //3b0000-3bffff = france mil_2(fs)
            || (i >= 0x3b0000 && i <= 0x3bffff)

            //3ea000-3ebfff = germany mil_1(df)
            || (i >= 0x3ea000 && i <= 0x3ebfff)
            //3f4000-3f7fff = germany mil_2(df)
            //3f8000-3fbfff = germany mil_3(df)
            || (i >= 0x3f4000 && i <= 0x3fbfff)

            //400000-40003f = united kingdom mil_1(ra)
            || (i >= 0x400000 && i <= 0x40003f)
            //43c000-43cfff = united kingdom mil(ra)
            || (i >= 0x43c000 && i <= 0x43cfff)

            //444000-446fff = austria mil(aq)
            || (i >= 0x444000 && i <= 0x446fff)

            //44f000-44ffff = belgium mil(bc)
            || (i >= 0x44f000 && i <= 0x44ffff)

            //457000-457fff = bulgaria mil(bu)
            || (i >= 0x457000 && i <= 0x457fff)

            //45f400-45f4ff = denmark mil(dg)
            || (i >= 0x45f400 && i <= 0x45f4ff)

            //468000-4683ff = greece mil(gc)
            || (i >= 0x468000 && i <= 0x4683ff)

            //473c00-473c0f = hungary mil(hm)
            || (i >= 0x473c00 && i <= 0x473c0f)

            //478100-4781ff = norway mil(nn)
            || (i >= 0x478100 && i <= 0x4781ff)
            //480000-480fff = netherlands mil(nm)
            || (i >= 0x480000 && i <= 0x480fff)
            //48d800-48d87f = poland mil(po)
            || (i >= 0x48d800 && i <= 0x48d87f)
            //497c00-497cff = portugal mil(pu)
            || (i >= 0x497c00 && i <= 0x497cff)
            //498420-49842f = czech republic mil(ct)
            || (i >= 0x498420 && i <= 0x49842f)

            //4b7000-4b7fff = switzerland mil(su)
            || (i >= 0x4b7000 && i <= 0x4b7fff)
            //4b8200-4b82ff = turkey mil(tq)
            || (i >= 0x4b8200 && i <= 0x4b82ff)

            //506f00-506fff = slovenia mil(sj)
            || (i >= 0x506f00 && i <= 0x506fff)

            //70c070-70c07f = oman mil(on)
            || (i >= 0x70c070 && i <= 0x70c07f)

            //710258-71025f = saudi arabia mil_1(sx)
            //710260-71027f = saudi arabia mil_2(sx)
            //710280-71028f = saudi arabia mil_3(sx)
            || (i >= 0x710258 && i <= 0x71028f)
            //710380-71039f = saudi arabia mil_4(sx)
            || (i >= 0x710380 && i <= 0x71039f)

            //738a00-738aff = israel mil(iz)
            || (i >= 0x738a00 && i <= 0x738aff)

            //7c822e-7c84ff = australia mil_1(av)
            || (i >= 0x7c822e && i <= 0x7c84ff)
            //7c8800-7c8fff = australia mil_7(av)
            || (i >= 0x7c8800 && i <= 0x7c88ff)
            //7c9000-7c9fff = australia mil_8(av)
            //7ca000-7cbfff = australia mil_9(av)
            || (i >= 0x7c9000 && i <= 0x7cbfff)
            //7d0000-7dffff = australia mil_11(av)
            //7e0000-7fffff = australia mil_12(av)
            || (i >= 0x7d0000 && i <= 0x7fffff)

            //800200-8002ff = india mil(im)
            || (i >= 0x800200 && i <= 0x8002ff)

            //c20000-c3ffff = canada mil(cb)
            || (i >= 0xc20000 && i <= 0xc3ffff)

            //e40000-e41fff = brazil mil(bq)
            || (i >= 0xe40000 && i <= 0xe41fff)

            //e80600-e806ff = chile mil(cq)
            //|| (i >= 0xe80600 && i <= 0xe806ff)
            // disabled due to civilian aircraft in hex range
    ) {
        a->dbFlags |= 1;
    }
}