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Disable overlay control as it seems to cause more problems than it solves

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at the moment (aircraft randomly appearing to be on the ground due to
CRC errors, etc)
This commit is contained in:
Oliver Jowett 2015-01-22 00:59:44 +00:00
parent 20456a83fd
commit 5beecb9f4f
1 changed files with 9 additions and 0 deletions
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9
mode_s.c
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@ -384,8 +384,12 @@ int scoreModesMessage(unsigned char *msg, int validbits)
if (icaoFilterTest(crc)) if (icaoFilterTest(crc))
return 1000; // Address/Parity return 1000; // Address/Parity
#if 0
// This doesn't seem useful, as we mistake a lot of CRC errors
// for overlay control
if (icaoFilterTestFuzzy(crc)) if (icaoFilterTestFuzzy(crc))
return 500; // Data/Parity return 500; // Data/Parity
#endif
return -1; return -1;
@ -511,12 +515,17 @@ int decodeModesMessage(struct modesMessage *mm, unsigned char *msg)
break; break;
} }
#if 0
// This doesn't seem useful, as we mistake a lot of CRC errors
// for overlay control
// Try a fuzzy match // Try a fuzzy match
if ( (mm->addr = icaoFilterTestFuzzy(mm->crc)) != 0) { if ( (mm->addr = icaoFilterTestFuzzy(mm->crc)) != 0) {
// We have an address that would match, assume it's correct // We have an address that would match, assume it's correct
mm->bds = (mm->crc ^ mm->addr) >> 16; // derive the BDS value based on what we think the address is mm->bds = (mm->crc ^ mm->addr) >> 16; // derive the BDS value based on what we think the address is
break; break;
} }
#endif
//fprintf(stderr, "reject: DF20/21 address doesn't match known ICAO\n"); //fprintf(stderr, "reject: DF20/21 address doesn't match known ICAO\n");
return -1; // no good return -1; // no good