Add Motorola Failsoft LC opcode $02

This is broadcast on channels when a site is in failsoft operation (site controller has failed or too few channels are functional to operate in trunking mode).

src/main/java/io/github/dsheirer/module/decode/p25/phase1/P25P1DecoderState.java

@@ -1984,6 +1984,9 @@ private void processLC(LinkControlWord lcw, long timestamp, boolean isTerminator
             case MOTOROLA_GROUP_REGROUP_VOICE_CHANNEL_UPDATE:
                 //Voice Channel Update message - indicates calls in-progress on another channel - ignored
                 break;
+            case MOTOROLA_FAILSOFT:
+                //Ignore - there's nothing we can do with failsoft
+                break;
             case MOTOROLA_TALKER_ALIAS_HEADER:
             case MOTOROLA_TALKER_ALIAS_DATA_BLOCK:
                 //Inore - we'll pickup the talker alias from the assembler in the MessageProcessor.

src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/lc/LinkControlOpcode.java

@@ -95,6 +95,7 @@ public enum LinkControlOpcode
 
     MOTOROLA_GROUP_REGROUP_VOICE_CHANNEL_USER("MOTOROLA GROUP REGROUP VOICE CHANNEL USER", 0),
     MOTOROLA_GROUP_REGROUP_VOICE_CHANNEL_UPDATE("MOTOROLA GROUP REGROUP VOICE CHANNEL UPDATE", 1),
+    MOTOROLA_FAILSOFT("MOTOROLA FAILSOFT", 2),
     MOTOROLA_GROUP_REGROUP_ADD("MOTOROLA GROUP REGROUP ADD", 3),
     MOTOROLA_GROUP_REGROUP_DELETE("MOTOROLA GROUP REGROUP DELETE", 4),
     MOTOROLA_UNIT_GPS("MOTOROLA UNIT GPS", 6),
@@ -241,6 +242,8 @@ public static LinkControlOpcode fromValue(int value, Vendor vendor)
                         return MOTOROLA_GROUP_REGROUP_VOICE_CHANNEL_USER;
                     case 1:
                         return MOTOROLA_GROUP_REGROUP_VOICE_CHANNEL_UPDATE;
+                    case 2:
+                        return MOTOROLA_FAILSOFT;
                     case 3:
                         return MOTOROLA_GROUP_REGROUP_ADD;
                     case 4:

src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/lc/LinkControlWordFactory.java

@@ -28,6 +28,7 @@
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.l3harris.LCHarrisUnknownOpcode42;
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.l3harris.LCHarrisUnknownOpcode43;
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola.LCMotorolaEmergencyAlarmActivation;
+import io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola.LCMotorolaFailsoft;
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola.LCMotorolaGroupGroupDelete;
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola.LCMotorolaGroupRegroupAdd;
 import io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola.LCMotorolaGroupRegroupVoiceChannelUpdate;
@@ -175,6 +176,8 @@ public static LinkControlWord create(CorrectedBinaryMessage message, long timest
             case L3HARRIS_UNKNOWN:
                 return new UnknownLinkControlWord(message);
 
+            case MOTOROLA_FAILSOFT:
+                return new LCMotorolaFailsoft(message);
             case MOTOROLA_GROUP_REGROUP_ADD:
                 return new LCMotorolaGroupRegroupAdd(message);
             case MOTOROLA_GROUP_REGROUP_DELETE:

src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/lc/motorola/LCMotorolaFailsoft.java

@@ -0,0 +1,57 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2024 Dennis Sheirer, 2024 Ilya Smirnov
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.module.decode.p25.phase1.message.lc.motorola;
+
+import io.github.dsheirer.bits.CorrectedBinaryMessage;
+import io.github.dsheirer.identifier.Identifier;
+import io.github.dsheirer.module.decode.p25.phase1.message.lc.LinkControlWord;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Failsoft operation.
+ */
+public class LCMotorolaFailsoft extends LinkControlWord
+{
+    /**
+     * Constructs a Link Control Word from the binary message sequence.
+     *
+     * @param message
+     */
+    public LCMotorolaFailsoft(CorrectedBinaryMessage message)
+    {
+        super(message);
+    }
+
+    @Override
+    public List<Identifier> getIdentifiers()
+    {
+        return Collections.EMPTY_LIST;
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append(" MOTOROLA FAILSOFT:");
+        sb.append(" MSG:").append(getMessage().toHexString());
+        return sb.toString();
+    }
+}