WD/Wifi: Add Wifi control implementations (#247)

* Add WD implementation.

* Add a few comments + Get rid of some magic numbers.

* Add HW_RVL check.

* Remove ISR calls in WD_Deinit() + Remove heap references + Pass wd_fd instead of WD_GetWork() in WD_Deinit().

* Add IE (Information Elements) operations.

GetLength, GetIE (Get the data), GetNumberOfIEs.

* Full rewrite IE operations.

The way I interpreted IEs was wrong, which lead to the code being absolutely useless and broken (The last commit happened because of the lack of tests).

* Return length instead of using a pointer.

* Simplify if cases in WD_GetRadioLevel.

* Use defined values for signal strength.

Author: abdelali221

Makefile

@@ -152,7 +152,7 @@ OGCOBJ		:=	\
 			console_font_8x16.o timesupp.o lock_supp.o usbgecko.o usbmouse.o \
 			sbrk.o malloc_lock.o kprintf.o stm.o aes.o sha.o ios.o es.o isfs.o usb.o network_common.o \
 			sdgecko_io.o sdgecko_buf.o gcsd.o argv.o network_wii.o wiisd.o conf.o usbstorage.o \
-			texconv.o wiilaunch.o sys_report.o
+			texconv.o wiilaunch.o wd.o sys_report.o
 
 #---------------------------------------------------------------------------------
 MODOBJ		:=	freqtab.o mixer.o modplay.o semitonetab.o gcmodplay.o

gc/ogc/wd.h

@@ -0,0 +1,169 @@
+/*-----------------------------------------------------------------------
+
+    wd.h -- Wireless Driver Implementation.
+
+    Copyright:
+    
+        - (C) 2025-2026 B. Abdelali (Abdelali221) (Author)
+        - (C) 2008 Dolphin Emulator Project (For providing data structures)
+
+    This software is provided 'as-is', without any express or implied
+    warranty.  In no event will the authors be held liable for any
+    damages arising from the use of this software.
+
+    Permission is granted to anyone to use this software for any
+    purpose, including commercial applications, and to alter it and
+    redistribute it freely, subject to the following restrictions:
+
+    1.	The origin of this software must not be misrepresented; you
+    must not claim that you wrote the original software. If you use
+    this software in a product, an acknowledgment in the product
+    documentation would be appreciated but is not required.
+
+    2.	Altered source versions must be plainly marked as such, and
+    must not be misrepresented as being the original software.
+
+    3.	This notice may not be removed or altered from any source
+    distribution.
+
+-----------------------------------------------------------------------*/
+
+#ifndef __WD_H_
+#define __WD_H_
+#include <gccore.h>
+
+#define SSID_LENGTH 32
+#define BSSID_LENGTH 6
+
+enum WDIOCTLV
+{
+    IOCTLV_WD_INVALID = 0x1000,
+    IOCTLV_WD_GET_MODE = 0x1001,          // WD_GetMode
+    IOCTLV_WD_SET_LINKSTATE = 0x1002,     // WD_SetLinkState
+    IOCTLV_WD_GET_LINKSTATE = 0x1003,     // WD_GetLinkState
+    IOCTLV_WD_SET_CONFIG = 0x1004,        // WD_SetConfig
+    IOCTLV_WD_GET_CONFIG = 0x1005,        // WD_GetConfig
+    IOCTLV_WD_CHANGE_BEACON = 0x1006,     // WD_ChangeBeacon
+    IOCTLV_WD_DISASSOC = 0x1007,          // WD_DisAssoc
+    IOCTLV_WD_MP_SEND_FRAME = 0x1008,     // WD_MpSendFrame
+    IOCTLV_WD_SEND_FRAME = 0x1009,        // WD_SendFrame
+    IOCTLV_WD_SCAN = 0x100a,              // WD_Scan
+    IOCTLV_WD_CALL_WL = 0x100c,           // WD_CallWL
+    IOCTLV_WD_MEASURE_CHANNEL = 0x100b,   // WD_MeasureChannel
+    IOCTLV_WD_GET_LASTERROR = 0x100d,     // WD_GetLastError
+    IOCTLV_WD_GET_INFO = 0x100e,          // WD_GetInfo
+    IOCTLV_WD_CHANGE_GAMEINFO = 0x100f,   // WD_ChangeGameInfo
+    IOCTLV_WD_CHANGE_VTSF = 0x1010,       // WD_ChangeVTSF
+    IOCTLV_WD_RECV_FRAME = 0x8000,        // WD_ReceiveFrame
+    IOCTLV_WD_RECV_NOTIFICATION = 0x8001  // WD_ReceiveNotification
+};
+
+// Capability flags :
+
+#define CAPAB_SECURED_FLAG 0x10
+
+// Information Elements IDs :
+
+#define IEID_SSID 0x0
+#define IEID_VENDORSPECIFIC 0xDD
+#define IEID_SECURITY 0x30
+
+// Signal Strength :
+
+#define WD_SIGNAL_STRONG 3
+#define WD_SIGNAL_NORMAL 2
+#define WD_SIGNAL_FAIR 1
+#define WD_SIGNAL_WEAK 0
+
+// WD Modes :
+
+enum MODES
+{
+    Unintialized = 0,
+    DSCommunications = 1,
+    NA0 = 2,
+    AOSSAPScan = 3,
+    NA1 = 4,
+    NA2 = 5,
+    NA3 = 6
+};
+
+// WD Information :
+
+typedef struct WDInfo
+{
+    u8 MAC[6];    
+    u16 EnableChannelsMask;
+    u16 NTRallowedChannelsMask;
+    u8 CountryCode[4];
+    u8 channel;
+    u8 initialized;
+    u8 version[80];
+    u8 unknown[48];
+} WDInfo;
+
+// Scan parameters :
+
+typedef struct ScanParameters
+{
+    u16         ChannelBitmap;
+    u16         MaxChannelTime;
+    u8          BSSID[BSSID_LENGTH];
+    u16         ScanType;
+    
+    u16         SSIDLength;
+    u8          SSID[SSID_LENGTH];
+    u8          SSIDMatchMask[6];
+
+} ScanParameters;
+
+// BSS Descriptor :
+
+typedef struct BSSDescriptor
+{
+    u16         length;
+    u16         RSSI;
+    u8          BSSID[6];
+    u16         SSIDLength;
+    u8          SSID[32];
+    u16         Capabilities;
+    struct
+    {
+        u16     basic;
+        u16     support;
+    } rateSet;
+    u16 beacon_period;
+    u16 DTIM_period;
+    u16 channel;
+    u16 CF_period;
+    u16 CF_max_duration;
+    u16 IEs_length;
+} BSSDescriptor;
+
+// Information Element Header :
+
+typedef struct IE_hdr
+{
+    u8 ID;
+    u8 len;
+} IE_hdr;
+
+// General Purpose :
+
+s32 NCD_LockWirelessDriver();
+u32 NCD_UnlockWirelessDriver(s32 lockid);
+int WD_Init(u8 mode);
+void WD_Deinit();
+int WD_GetInfo(WDInfo* inf);
+
+// AP Scan related : 
+
+u8 WD_GetRadioLevel(BSSDescriptor* Bss);
+int WD_Scan(ScanParameters *settings, u8* buff, u16 buffsize);
+int WD_ScanOnce(ScanParameters *settings, u8* buff, u16 buffsize);
+u8 WD_GetNumberOfIEs(BSSDescriptor* Bss);
+int WD_GetIELength(BSSDescriptor* Bss, u8 ID);
+int WD_GetIE(BSSDescriptor* Bss, u8 ID, u8* buff, u8 buffsize);
+void WD_SetDefaultScanParameters(ScanParameters* set);
+
+#endif