Upstream changes with GUI, screen glitch fixes and more!

- System version now displays region ID:

U = USA/CAN
E = EUR/AUS
J = JPN
C = CHN
K = KOR
T = TWN

- Minor code clean up + consistency.

- Now displays home menu ID in misc tab.

- WiFi information, SSID and password. Thanks to LiquidFenrir for his WiFi manager's network struct.

- New colours:

- Displays Homemenu ID
- Displays IP address
- Displays brightness

Cyan for misc info.
Purple for NNID.
Green for WiFi slots.

- Fixed buffer overflows thanks to GCC  7.1.0.

include/misc.h

@@ -4,7 +4,7 @@
 #include <3ds.h>
 
 u32 titleCount(FS_MediaType mediaType);
-bool detectSD();
+bool detectSD(void);
 u64 getFreeStorage(FS_SystemMediaType mediaType);
 u64 getTotalStorage(FS_SystemMediaType mediaType);
 u64 getUsedStorage(FS_SystemMediaType mediaType);

include/power.h

@@ -3,6 +3,6 @@
 
 #include <3ds.h>
 
-const char * batteryStatus();
+const char * batteryStatus(void);
 
 #endif

include/system.h

@@ -3,19 +3,20 @@
 
 #include <3ds.h>
 
-const char * getModel();
-const char * getRegion();
-const char * getLang();
-char * getMacAddress();
-char * getScreenType();
-u64 getLocalFriendCodeSeed();
+const char * getModel(void);
+const char * getRegion(void);
+const char getFirmRegion(void);
+const char * getLang(void);
+char * getMacAddress(void);
+char * getScreenType(void);
+u64 getLocalFriendCodeSeed(void);
 char * getSerialNum(void);
 u32 getDeviceId(void);
 u64 getSoapId(void);
 char * getDeviceCert(void);
 char * getNNIDInfo(u32 size, u32 blkId);
-char * isDebugModeEnabled();
+char * isDebugModeEnabled(void);
 char * getBrightness(u32 screen);
-char * getCardSlotStatus();
+char * getCardSlotStatus(void);
 
 #endif

include/utils.h

@@ -12,6 +12,6 @@
 
 void getSizeString(char *string, uint64_t size);
 void utf2ascii(char* dst, u16* src);
-char * base64Encode(u8 const * input);
+char * base64Encode(u8 const * bytesToEnc, size_t bufLen);
 
 #endif

include/wifi.h

@@ -0,0 +1,72 @@
+#ifndef WIFI_H
+#define WIFI_H
+
+#include <3ds.h>
+
+/*	
+	The things below here were found by LiquidFenrir and his Wifi Manager. (https://github.com/LiquidFenrir/WifiManager)
+*/
+
+#define CFG_WIFI_BLKID (u32)0x00080000
+#define CFG_WIFI_SLOT_SIZE (u32)0xC00
+
+typedef struct {
+	bool exists;
+	bool use;
+	bool second;
+	u8 padding1;
+	char SSID[0x20];
+	u8 SSID_length;
+	u8 AP_encryption_type;
+	u16 padding2;
+	char password[0x40]; //plaintext, blank for a network set up with WPS
+	u8 passwordPSK[0x20];
+} networkStruct;
+
+typedef struct {
+	bool exists;
+	u8 padding1;
+	u16 checksum; //crc-16 of the next 0x410 bytes, with initval 0: https://github.com/lammertb/libcrc/blob/v2.0/src/crc16.c#L43-L76
+	//if the network is set "normally", 'use' is 1
+	//if the network is set by WPS, 'use' is 0
+	//'second' is 0
+	//if setting multiple networks with WPS in the same session, only the last set will have this. others will have completely 0x00 except for 'exists'
+	networkStruct network; 
+	u8 padding2[0x20];
+	//completely 0x00 if the network was set "normally", otherwise (set by WPS) normal but 'use' and 'second' are 1
+	networkStruct network_WPS;
+	u8 padding3[0x20C];
+
+	bool auto_obtain_IP; //defaults to 1
+	bool auto_obtain_DNS; //defaults to 1
+	u16 padding4;
+
+	u8 IP_address[4];
+	u8 gateway_address[4];
+	u8 subnet_mask[4];
+
+	u8 primary_DNS[4];
+	u8 secondary_DNS[4];
+
+	// if setting multiple networks in the same session, only the last set will have these. others will have completely 0x00
+	u8 unk1[4];
+	u8 IP_to_use[4];
+	u8 MAC_address[6];
+	u8 channel;
+	u8 padding5;
+
+	bool use_proxy; //defaults to 0
+	bool basic_authentication; //defaults to 0
+	u16 port_number; //defaults to 1
+	char proxy_address[0x30]; //including ending nullbyte
+	u8 padding6[0x34];
+	char proxy_username[0x20]; //including ending nullbyte
+	char proxy_password[0x20]; //including ending nullbyte
+	u16 padding7;
+	u16 MTU_value; //defaults to 1400, range [576;1500]
+
+	//nothing beyond this point (0x414), but each slot is 0xC00 big...
+	u8 padding8[0x7EC];
+} wifiBlock;
+
+#endif

resources/cia.rsf

@@ -215,6 +215,7 @@ AccessControlInfo:
    - cecd:u
    - cfg:nor
    - cfg:u
+   - cfg:i
    - cfg:s
    - csnd:SND
    - dsp::DSP

source/kernel.c

@@ -53,7 +53,7 @@ char * getCID(int type)
 	else if (type == 1) //NAND
 		FSUSER_GetNandCid(buf, 0x10);
 
-	sprintf(cid, "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
+	snprintf(cid, 33, "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
 			buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
 			buf[6], buf[7], buf[8], buf[9], buf[10], buf[11],
 			buf[12], buf[13], buf[14], buf[15]);