From 498b1f12e99f746397326179375f6e54229e5547 Mon Sep 17 00:00:00 2001
From: Adam Novak <interfect@gmail.com>
Date: Sun, 13 Feb 2022 16:36:24 -0500
Subject: [PATCH] Get MD5 code building for Linux

---
 Config.h | 36 +++++++++++++++++++++++++++++++++++-
 MD5.cpp  |  8 +++++++-
 MD5.h    | 10 ++++++++--
 Makefile | 13 +++++++++++++
 4 files changed, 63 insertions(+), 4 deletions(-)

diff --git a/Config.h b/Config.h
index ad06363..f5d6f38 100644
--- a/Config.h
+++ b/Config.h
@@ -8,10 +8,12 @@
 
 	#define PLATFORM_AVR   0x90
     #define PLATFORM_ESP32 0x80
+    #define PLATFORM_LINUX 0x70
 
 	#define MCU_1284P 0x91
 	#define MCU_2560  0x92
 	#define MCU_ESP32 0x81
+    #define MCU_LINUX 0x71
 
 	#define BOARD_RNODE         0x31
 	#define BOARD_HMBRW         0x32
@@ -20,6 +22,10 @@
 	#define BOARD_GENERIC_ESP32 0x35
 	#define BOARD_LORA32_V2_0   0x36
 	#define BOARD_LORA32_V2_1   0x37
+    #define BOARD_SPIDEV        0x38
+    
+    #define LIBRARY_ARDUINO     0x1
+    #define LIBRARY_C           0x2
 
 	#define MODE_HOST 0x11
 	#define MODE_TNC  0x12
@@ -33,6 +39,9 @@
 	#elif defined(ESP32)
 	    #define PLATFORM PLATFORM_ESP32
 	    #define MCU_VARIANT MCU_ESP32
+    #elif defined(__unix__)
+        #define PLATFORM PLATFORM_LINUX
+        #define MCU_VARIANT MCU_LINUX
 	#else
 	    #error "The firmware cannot be compiled for the selected MCU variant"
 	#endif
@@ -54,6 +63,7 @@
 		const int pin_led_tx = 13;
 
 		#define BOARD_MODEL BOARD_RNODE
+        #define LIBRARY_TYPE LIBRARY_ARDUINO
 
 		#define CONFIG_UART_BUFFER_SIZE 6144
 		#define CONFIG_QUEUE_SIZE 6144
@@ -70,6 +80,7 @@
 		const int pin_led_tx = 13;
 
 		#define BOARD_MODEL BOARD_HMBRW
+        #define LIBRARY_TYPE LIBRARY_ARDUINO
 
 		#define CONFIG_UART_BUFFER_SIZE 768
 		#define CONFIG_QUEUE_SIZE 5120
@@ -130,6 +141,8 @@
 		#else
 			#error An unsupported board was selected. Cannot compile RNode firmware.
 		#endif
+        
+        #define LIBRARY_TYPE LIBRARY_ARDUINO
 
 		#define CONFIG_UART_BUFFER_SIZE 6144
 		#define CONFIG_QUEUE_SIZE 6144
@@ -141,6 +154,22 @@
 		#define GPS_BAUD_RATE 9600
 		#define PIN_GPS_TX 12
 		#define PIN_GPS_RX 34
+    #elif MCU_VARIANT == MCU_LINUX
+        const int pin_cs = -1;
+		const int pin_reset = -1;
+		const int pin_dio = -1;
+		const int pin_led_rx = -1;
+		const int pin_led_tx = -1;
+
+		#define BOARD_MODEL BOARD_SPIDEV
+        #define LIBRARY_TYPE LIBRARY_C
+
+		#define CONFIG_UART_BUFFER_SIZE 6144
+		#define CONFIG_QUEUE_SIZE 6144
+		#define CONFIG_QUEUE_MAX_LENGTH 200
+
+		#define EEPROM_SIZE 4096
+		#define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
 	#endif
 
 	#if BOARD_MODEL == BOARD_TBEAM
@@ -148,7 +177,12 @@
 		#define I2C_SCL 22
 		#define PMU_IRQ 35
 	#endif
-
+    
+    #if LIBRARY_TYPE == LIBRARY_C
+        // We need standard int types before we go any further
+        #include <cstdint>
+    #endif
+    
 	#define eeprom_addr(a) (a+EEPROM_OFFSET)
 
 	// MCU independent configuration parameters
diff --git a/MD5.cpp b/MD5.cpp
index 56daa77..52317e5 100644
--- a/MD5.cpp
+++ b/MD5.cpp
@@ -1,5 +1,11 @@
 #include "MD5.h"
 
+#if LIBRARY_TYPE == LIBRARY_ARDUINO
+    #include "Arduino.h"
+#elif LIBRARY_TYPE == LIBRARY_C
+    #include <cstdlib>
+#endif
+
 MD5::MD5()
 {
 	//nothing
@@ -298,4 +304,4 @@ unsigned char* MD5::make_hash(char *arg,size_t size)
 	MD5Update(&context, arg, size);
 	MD5Final(hash, &context);
 	return hash;
-}
\ No newline at end of file
+}
diff --git a/MD5.h b/MD5.h
index 3ec8d81..7ca88bd 100644
--- a/MD5.h
+++ b/MD5.h
@@ -1,7 +1,13 @@
 #ifndef MD5_h
 #define MD5_h
 
-#include "Arduino.h"
+#include "Config.h"
+
+#if LIBRARY_TYPE == LIBRARY_ARDUINO
+    #include "Arduino.h"
+#elif LIBRARY_TYPE == LIBRARY_C
+    #include <cstdlib>
+#endif
 
 /*
  * This is an OpenSSL-compatible implementation of the RSA Data Security,
@@ -49,4 +55,4 @@ public:
 	static void MD5Update(void *ctxBuf, const void *data, size_t size);
 };
 
-#endif
\ No newline at end of file
+#endif
diff --git a/Makefile b/Makefile
index 7e3e416..1c2fa08 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,9 @@ prep-samd:
 	arduino-cli core update-index --config-file arduino-cli.yaml
 	arduino-cli core install adafruit:samd
 
+prep-linux:
+	mkdir -p bin
+	mkdir -p obj
 
 
 firmware:
@@ -135,3 +138,13 @@ release-mega2560:
 	arduino-cli compile --fqbn arduino:avr:mega -e
 	cp build/arduino.avr.mega/RNode_Firmware.ino.hex Release/rnode_firmware_latest_m2560.hex
 	rm -r build
+    
+.PHONY: clean prep-linux
+
+clean:
+	rm -Rf bin
+	rm -Rf obj
+	
+obj/MD5.o: MD5.cpp MD5.h Config.h ROM.h prep-linux
+	$(CC) -c -o $@ $<
+