#1399 Resolves device ID parsing issue for Motorola ARS Device Registration. (#1400)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/bits/BinaryMessage.java

@@ -1,32 +1,28 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * 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/>
- *  * *****************************************************************************
+ * 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.bits;
 
 import io.github.dsheirer.edac.CRC;
+import java.util.BitSet;
 import org.apache.commons.lang3.Validate;
 import org.apache.commons.math3.util.FastMath;
 
-import java.util.BitSet;
-
 public class BinaryMessage extends BitSet
 {
     private static final long serialVersionUID = 1L;
@@ -1038,6 +1034,51 @@ public class BinaryMessage extends BitSet
         return buffer;
     }
 
+    /**
+     * Loads the hexadecimal text into a binary message
+     * @param hex text to load from
+     * @return loaded binary message
+     */
+    public static BinaryMessage loadHex(String hex)
+    {
+        if(!hex.matches("[0-9A-F]*"))
+        {
+            throw new IllegalArgumentException("Message must contain only 0-9 and A-F hexadecimal characters");
+        }
+
+        int length = hex.length() / 2;
+
+        if(length * 2 < hex.length())
+        {
+            length++;
+        }
+
+        BinaryMessage buffer = new BinaryMessage(length * 8);
+
+        int bufferOffset = 0;
+        for(int x = 0; x < hex.length(); x += 2)
+        {
+            int endIndex = x + 2;
+            if(endIndex > hex.length())
+            {
+                endIndex--;
+            }
+
+            String rawHex = hex.substring(x, endIndex);
+
+            if(rawHex.length() == 1)
+            {
+                rawHex = rawHex + "0";
+            }
+
+            int value = Integer.parseInt(rawHex, 16);
+            buffer.setByte(bufferOffset, (byte)(value & 0xFF));
+            bufferOffset += 8;
+        }
+
+        return buffer;
+    }
+
     /**
      * Left rotates the bits between start and end indices, number of places.
      */

src/main/java/io/github/dsheirer/module/decode/ip/ars/DeviceRegistration.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * 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
@@ -15,7 +14,7 @@
  *
  * 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.ip.ars;
@@ -25,11 +24,10 @@ import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSDevice;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSPassword;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSUser;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Automatic Registration Service - Device Registration
@@ -176,7 +174,7 @@ public class DeviceRegistration extends ARSHeader
 
         pointer += 8;
 
-        if(deviceIdentifierSize > 0)
+        if(deviceIdentifierSize > 0 && deviceIdentifierSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 
@@ -186,21 +184,13 @@ public class DeviceRegistration extends ARSHeader
                 pointer += 8;
             }
 
-            try
-            {
-                int device = Integer.parseInt(sb.toString());
-                mDevice = ARSDevice.createFrom(device);
-            }
-            catch(Exception e)
-            {
-                mLog.error("Error parsing ARS device identifier from value [" + sb.toString() + "]");
-            }
+            mDevice = ARSDevice.createFrom(sb.toString());
         }
 
         int userIdentifierSize = getMessage().getInt(BYTE_VALUE, pointer);
         pointer += 8;
 
-        if(userIdentifierSize > 0)
+        if(userIdentifierSize > 0 && userIdentifierSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 
@@ -216,7 +206,7 @@ public class DeviceRegistration extends ARSHeader
         int passwordSize = getMessage().getInt(BYTE_VALUE, pointer);
         pointer += 8;
 
-        if(passwordSize > 0)
+        if(passwordSize > 0 && passwordSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 

src/main/java/io/github/dsheirer/module/decode/ip/ars/UserRegistration.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * 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
@@ -15,7 +14,7 @@
  *
  * 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.ip.ars;
@@ -25,11 +24,10 @@ import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSDevice;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSPassword;
 import io.github.dsheirer.module.decode.ip.ars.identifier.ARSUser;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class UserRegistration extends ARSHeader
 {
@@ -108,7 +106,7 @@ public class UserRegistration extends ARSHeader
 
         pointer += 8;
 
-        if(deviceIdentifierSize > 0)
+        if(deviceIdentifierSize > 0 && deviceIdentifierSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 
@@ -118,22 +116,13 @@ public class UserRegistration extends ARSHeader
                 pointer += 8;
             }
 
-            try
-            {
-                int device = Integer.parseInt(sb.toString());
-                mDevice = ARSDevice.createFrom(device);
-            }
-            catch(Exception e)
-            {
-                //Abort processing
-                return;
-            }
+            mDevice = ARSDevice.createFrom(sb.toString());
         }
 
         int userIdentifierSize = getMessage().getInt(BYTE_VALUE, pointer);
         pointer += 8;
 
-        if(userIdentifierSize > 0)
+        if(userIdentifierSize > 0 && deviceIdentifierSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 
@@ -149,7 +138,7 @@ public class UserRegistration extends ARSHeader
         int passwordSize = getMessage().getInt(BYTE_VALUE, pointer);
         pointer += 8;
 
-        if(passwordSize > 0)
+        if(passwordSize > 0 && passwordSize < 8)
         {
             StringBuilder sb = new StringBuilder();
 

src/main/java/io/github/dsheirer/module/decode/ip/ars/identifier/ARSDevice.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- *  Copyright (C) 2014-2020 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * 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
@@ -22,20 +22,20 @@ package io.github.dsheirer.module.decode.ip.ars.identifier;
 import io.github.dsheirer.identifier.Form;
 import io.github.dsheirer.identifier.IdentifierClass;
 import io.github.dsheirer.identifier.Role;
-import io.github.dsheirer.identifier.integer.IntegerIdentifier;
+import io.github.dsheirer.identifier.string.StringIdentifier;
 import io.github.dsheirer.protocol.Protocol;
 
 /**
  * Automatic Registration Service - Device Identifier
  */
-public class ARSDevice extends IntegerIdentifier
+public class ARSDevice extends StringIdentifier
 {
     /**
      * Constructs an instance
      * @param value of the device identifier
      * @param role of the device (TO/FROM)
      */
-    public ARSDevice(int value, Role role)
+    public ARSDevice(String value, Role role)
     {
         super(value, IdentifierClass.USER, Form.ARS_DEVICE, role);
     }
@@ -49,7 +49,7 @@ public class ARSDevice extends IntegerIdentifier
     /**
      * Creates an ARS device with a FROM role
      */
-    public static ARSDevice createFrom(int value)
+    public static ARSDevice createFrom(String value)
     {
         return new ARSDevice(value, Role.FROM);
     }
@@ -57,7 +57,7 @@ public class ARSDevice extends IntegerIdentifier
     /**
      * Creates an ARS device with a TO role
      */
-    public static ARSDevice createTo(int value)
+    public static ARSDevice createTo(String value)
     {
         return new ARSDevice(value, Role.TO);
     }