GitHub/dsd-fme
1
0
Fork 0
mirror of https://github.com/lwvmobile/dsd-fme.git synced 2026-11-13 01:07:24 -05:00
Code Issues Packages Projects Releases Wiki Activity

EDACS: More WIP/Tests on EA Dynamic Regrouping; #252

Browse Source
This commit is contained in:
lwvmobile
2024-04-15 07:17:07 -04:00
parent 854b421235
commit d86c520509
1 changed files with 66 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
src/edacs-fme.c
View File

@@ -794,23 +794,79 @@ void edacs(dsd_opts * opts, dsd_state * state)
fprintf (stderr, "%s", KNRM);
}
//Patch Groups / Dynamic Regroup -- Reverse Engineer WIP from observations and guesswork
//Patch Groups / Dynamic Regroup -- Current Code
// else if (mt2 == 0xC)
// {
// //Note: First 9 bits of msg_1 are the mt1 and mt2 bits
// int unk1 = (msg_1 & 0x70000) >> 16; //unknown 3 bit value preceeding the SGID
// int sgid = (msg_1 & 0xFFFF); //patched supergroup ID
// //Updated Observation: The 'SSN' value may not be unique in this instance, so may be an entirely different value
// //altogether. Its function is still unknown, but for the sake of displaying patches, is not required.
// int ssn = (msg_2 & 0xFF00000) >> 20; //this value seems to incrememnt based on SGID, so assigning 8-bit as the SSN
// int target = (msg_2 & 0xFFFFF); //target group or individual ID (20-bit) to include in supergroup
// fprintf (stderr, "%s", KWHT);
// fprintf (stderr, " System Dynamic Regroup :: SGID [%05d] Target [%07d]", sgid, target);
// if (unk1) fprintf (stderr, " UNK1 [%01X]", unk1); //this value seems to always be 7 for an active patch, 0 for a termination of a patch
// if (ssn) fprintf (stderr, " UNK2 [%02X]", ssn); //this may or may not be a unique value to each SGID, is FE for termination of a patch
// fprintf (stderr, "%s", KNRM);
// }
//Patch Groups / Dynamic Regroup -- Reverse Engineer WIP from observations, guesswork, and documented P25 MFID A4 regroup operations
else if (mt2 == 0xC)
{
//Note: Due to the method used to reverse engineer this patch using conventions from a newer documented P25 source (MFID A4 L3Harris),
//its possible that the conventions, terminology, and bits signalled in this message are not entirely accurate, but are just speculation
//Note: First 9 bits of msg_1 are the mt1 and mt2 bits
int unk1 = (msg_1 & 0x70000) >> 16; //unknown 3 bit value preceeding the SGID
int sgid = (msg_1 & 0xFFFF); //patched supergroup ID
// FF80000 (visualization aide)
int tga = (msg_1 & 0x70000) >> 16; //unknown 3 bit value preceeding the SGID (TGA?)
int unk1 = (msg_1 & 0xFF00) >> 8; //unknown 8 bit value preceeding the TGA/Options
int sgid = (msg_1 & 0xFF); //patched supergroup ID expressed as an 8 bit value
//Updated Observation: The 'SSN' value may not be unique in this instance, so may be an entirely different value
//altogether. Its function is still unknown, but for the sake of displaying patches, is not required.
int ssn = (msg_2 & 0xFF00000) >> 20; //this value seems to incrememnt based on SGID, so assigning 8-bit as the SSN
//Observation: The SSN value appears to be unique, but also different between sites, as in, each site
//has its own SSN for the same SGID patching, possibly a first come first serve pool value?
int ssn = (msg_2 & 0xF800000) >> 23; //this value seems to incrememnt based on SGID, 5-bit value
int unk2 = (msg_2 & 0x700000) >> 20; //unknown 3-bit value, possibly linked to TGA when patch is deleted
int target = (msg_2 & 0xFFFFF); //target group or individual ID (20-bit) to include in supergroup
//Ilya, please don't nit fix my logging format for these, it breaks grep when parsing a bunch of these all at once
fprintf (stderr, "%s", KWHT);
fprintf (stderr, " System Dynamic Regroup :: SGID [%05d] Target [%07d]", sgid, target);
if (unk1) fprintf (stderr, " UNK1 [%01X]", unk1); //this value seems to always be 7 for an active patch, 0 for a termination of a patch
if (ssn) fprintf (stderr, " UNK2 [%02X]", ssn); //this may or may not be a unique value to each SGID, is FE for termination of a patch
fprintf (stderr, " System Dynamic Regroup :: SP-WGID: %03d; Target: %07d;", sgid, target);
//just a guess, but when target == sgid, then the unk2 value is 6 (as opposed to 7)
//so is this signalling the same TGA value, but the bit for activate is deactivated?
if (sgid == target) //or SSN == 0x1F
tga = unk2;
//decode potential TGA values (assumming same as Harris P25)
if (tga & 4) fprintf (stderr, " One-Way"); //Simulselect
else fprintf (stderr, " Two-Way"); //Patch
if (tga & 2) fprintf (stderr, " Group");
else fprintf (stderr, " Radio"); //Individual
fprintf (stderr, " Patch");
if (tga & 1) fprintf (stderr, " Update");
else fprintf (stderr, " Delete");
if (sgid != target)
{
fprintf (stderr, " TGA: %01X;", tga); //this value seems to always be 7 for an active patch, 0 for a termination of a patch (6 if assigned the unk2 value)
if (unk1)
fprintf (stderr, " UNK1: %01X;", unk1);
if (unk2)
fprintf (stderr, " UNK2: %02X;", unk2);
fprintf (stderr, " SSN: %02X;", ssn); //this may or may not be a unique value to each SGID, is 1F for termination of a patch
}
else
{
fprintf (stderr, " TGA: %01X;", tga); //this value seems to always be 7 for an active patch, 0 for a termination of a patch (6 if assigned the unk2 value)
if (unk1)
fprintf (stderr, " UNK1: %02X;", unk1);
}
fprintf (stderr, "%s", KNRM);
}
//Serial Number Request (not seen in the wild, see US patent 20030190923, Figure 2b)