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EDACS: Tweak EA Patch / Regroup Message; Add Comments;

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lwvmobile 2024-04-12 17:37:59 -04:00
parent 5c7f285b9d
commit 79f8503c09
1 changed files with 5 additions and 2 deletions
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7
src/edacs-fme.c
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@ -790,19 +790,22 @@ void edacs(dsd_opts * opts, dsd_state * state)
fprintf (stderr, "%s", KNRM);
}
//Patch Groups -- Reverse Engineer WIP from observations and guesswork
//Patch Groups / Dynamic Regroup -- Reverse Engineer WIP from observations and guesswork
else if (mt2 == 0xC)
{
//Note: First 9 bits of msg_1 are the mt1 and mt2 bits
int unk1 = (msg_1 & 0x70000) >> 20; //unknown 3 bit value preceeding the SGID
int sgid = (msg_1 & 0xFFFF); //patched supergroup ID
//Note: SSN is the supergroup sequence number in P25 Harris lingo, but you would think this would be kind of redundant
//since the SGID is itself a unique number as well (waste of bits), but guess that's how their systems work
//that being said, the SSN is always the same for each SGID, so those values seem to go together here as well
int ssn = (msg_2 & 0xFF00000) >> 20; //this value seems to incrememnt based on SGID, so assigning 8-bit as the SSN
int unk2 = (msg_2 & 0xF0000) >> 16; //unknown 4 bit value preceeding 20-bit target value of patch
int target = (msg_2 & 0xFFFFF); //target group or individual ID (20-bit) to include in supergroup
fprintf (stderr, "%s", KMAG); //just make it stick out for now
fprintf (stderr, " Patch :: SSN: %03d; SGID: %05d; Target: %07d;", ssn, sgid, target);
fprintf (stderr, " System Dynamic Regroup :: SSN: %03d; SGID: %05d; Target: %07d;", ssn, sgid, target);
if (unk1) fprintf (stderr, " UNK1: %X;", unk1); //this value seems to always be zero
if (unk2) fprintf (stderr, " UNK2: %X;", unk2); //this value seems to always be zero
fprintf (stderr, "%s", KNRM);