void icaoFilterAdd(uint32_t addr)
{
uint32_t h, h0;
h0 = h = icaoHash(addr);
while (icao_filter_active[h] && icao_filter_active[h] != addr) {
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (h == h0) {
FPRINTF(stderr, "ICAO hash table full, increase ICAO_FILTER_SIZE\n");
return;
}
}
if (!icao_filter_active[h])
icao_filter_active[h] = addr;
// also add with a zeroed top byte, for handling DF20/21 with Data Parity
h0 = h = icaoHash(addr & 0x00ffff);
while (icao_filter_active[h] && (icao_filter_active[h] & 0x00ffff) != (addr & 0x00ffff)) {
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (h == h0) {
FPRINTF(stderr, "ICAO hash table full, increase ICAO_FILTER_SIZE\n");
return;
}
}
if (!icao_filter_active[h])
icao_filter_active[h] = addr;
}
void icaoFilterAdd(uint32_t addr)
{
uint32_t h = icaoHash(addr);
while (icao_filter_active[h] && icao_filter_active[h] != addr)
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (!icao_filter_active[h])
icao_filter_active[h] = addr;
// also add with a zeroed top byte, for handling DF20/21 with Data Parity
h = icaoHash(addr & 0x00ffff);
while (icao_filter_active[h] && (icao_filter_active[h] & 0x00ffff) != (addr & 0x00ffff))
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (!icao_filter_active[h])
icao_filter_active[h] = addr;
}
uint32_t icaoFilterTestFuzzy(uint32_t partial)
{
uint32_t h, h0;
partial &= 0x00ffff;
h0 = h = icaoHash(partial);
while (icao_filter_a[h] && (icao_filter_a[h] & 0x00ffff) != partial) {
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (h == h0)
break;
}
if ((icao_filter_a[h] & 0x00ffff) == partial)
return icao_filter_a[h];
h = h0;
while (icao_filter_b[h] && (icao_filter_b[h] & 0x00ffff) != partial) {
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (h == h0)
break;
}
if ((icao_filter_b[h] & 0x00ffff) == partial)
return icao_filter_b[h];
return 0;
}
int icaoFilterTest(uint32_t addr)
{
uint32_t h, h0;
h0 = h = icaoHash(addr);
while (icao_filter_a[h] && icao_filter_a[h] != addr)
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (icao_filter_a[h])
return 1;
h = h0;
while (icao_filter_b[h] && icao_filter_b[h] != addr)
h = (h+1) & (ICAO_FILTER_SIZE-1);
if (icao_filter_b[h])
return 1;
return 0;
}
