version 5.2.3

DCCEXParser.cpp

@@ -210,8 +210,10 @@ int16_t DCCEXParser::splitValues(int16_t result[MAX_COMMAND_PARAMS], const byte
         case 1: // skipping spaces before a param
             if (hot == ' ')
                 break;
-            if (hot == '\0' || hot == '>')
-                return parameterCount;
+            if (hot == '\0')
+	      return -1;
+	    if (hot == '>')
+	      return parameterCount;
             state = 2;
             continue;
 
@@ -304,14 +306,19 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
 #ifndef DISABLE_EEPROM
     (void)EEPROM; // tell compiler not to warn this is unused
 #endif
+    byte params = 0;
     if (Diag::CMD)
         DIAG(F("PARSING:%s"), com);
     int16_t p[MAX_COMMAND_PARAMS];
     while (com[0] == '<' || com[0] == ' ')
         com++; // strip off any number of < or spaces
     byte opcode = com[0];
-    byte params = splitValues(p, com, opcode=='M' || opcode=='P');
-    
+    int16_t splitnum = splitValues(p, com, opcode=='M' || opcode=='P');
+    if (splitnum < 0 || splitnum >= MAX_COMMAND_PARAMS) // if arguments are broken, leave but via printing <X>
+      goto out;
+    // Because of check above we are now inside byte size
+    params = splitnum;
+
     if (filterCallback)
         filterCallback(stream, opcode, params, p);
     if (filterRMFTCallback && opcode!='\0')
@@ -837,14 +844,18 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
         return; 
 
     default: //anything else will diagnose and drop out to <X>
+      if (opcode >= ' ' && opcode <= '~') {
         DIAG(F("Opcode=%c params=%d"), opcode, params);
         for (int i = 0; i < params; i++)
             DIAG(F("p[%d]=%d (0x%x)"), i, p[i], p[i]);
-        break;
+      } else {
+	DIAG(F("Unprintable %x"), opcode);
+      }
+      break;
 
     } // end of opcode switch
 
-    // Any fallout here sends an <X>
+out:// Any fallout here sends an <X>
     StringFormatter::send(stream, F("<X>\n"));
 }
 

GITHUB_SHA.h

@@ -1 +1 @@
-#define GITHUB_SHA "devel-202311141013Z"
+#define GITHUB_SHA "devel-202311160737Z"

SerialManager.cpp

@@ -111,14 +111,15 @@ void SerialManager::loop2() {
             bufferLength = 0;
             buffer[0] = '\0';
         }
-        else if (ch == '>') {
-            buffer[bufferLength] = '\0';
-            DCCEXParser::parse(serial, buffer, NULL); 
-            inCommandPayload = false;
-            break;
-        }
-        else if (inCommandPayload) {
-            if (bufferLength <  (COMMAND_BUFFER_SIZE-1)) buffer[bufferLength++] = ch;
+        else if  (inCommandPayload) {
+	  if (bufferLength <  (COMMAND_BUFFER_SIZE-1))
+	    buffer[bufferLength++] = ch;
+	  if (ch == '>') {
+	    buffer[bufferLength] = '\0';
+	    DCCEXParser::parse(serial, buffer, NULL); 
+	    inCommandPayload = false;
+	    break;
+	  }
         }
     }
     

version.h

@@ -3,7 +3,8 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.2.2"
+#define VERSION "5.2.3"
+// 5.2.3  - Bugfix: Catch stange input to parser
 // 5.2.2  - Added option to allow MAX_CHARACTER_ROWS to be defined in config.h
 // 5.2.1  - Trackmanager rework for simpler structure
 // 5.2.0  - ESP32: Autoreverse and booster mode support