1 files changed, 131 insertions, 0 deletions
diff --git a/Drivers/Hello/Hello.c b/Drivers/Hello/Hello.c
new file mode 100644
index 00000000..ba3d9733
--- /dev/null
+++ b/Drivers/Hello/Hello.c
@@ -0,0 +1,131 @@
+/* -------------------------------------------
+
+	Copyright Zeta Electronics Corporation
+
+------------------------------------------- */
+
+#include <DDK/KernelString.h>
+#include <DDK/KernelPrint.h>
+#include <DDK/KernelDev.h>
+
+struct HelloMasterConfigHeader;
+struct HelloMasterConfigHeaderInput;
+
+struct HelloMasterConfigHeaderInput
+{
+	size_t							fSizeOfOutput;
+	struct HelloMasterConfigHeader* fOutput;
+};
+
+/// @file Hello.c
+/// @brief Zero configuration protocol, a much more better protocol for zero configuration.
+
+#define cHMCHMaxDataLength (1024)
+
+typedef struct HelloMasterConfigHeader
+{
+	int64_t fMagic;
+	int64_t fVersion;
+	int64_t fSourceAddress;
+	size_t	fDataLength;
+	wchar_t fUTF16Data[cHMCHMaxDataLength];
+} __attribute__((packed)) HelloMasterConfigHeader;
+
+#define cHMCHDeviceLen 255
+
+static kernelDeviceRef			cDev		= nil;
+static char*					cDeviceUUID = nil; // 3ed40738-c7d6-4b59-afdf-3c104b05fbf
+static HelloMasterConfigHeader* cHeader		= nil;
+
+/// @brief Link to master device to attribute DHCP lease.
+static void __hello_link_device(void* a0)
+{
+	kernelPrintStr("Hello: turning up...\r");
+
+	if (!cDev)
+	{
+		// open raw network device.
+		cDev = kernelOpenDevice("RAWNET:\\");
+	}
+
+	cDev->write("+LINK", kernelStringLength("+LINK"));
+	cDev->wait();
+
+	cDev->write((void*)cDeviceUUID, kernelStringLength(cDeviceUUID));
+	cDev->wait();
+
+	if (cHeader)
+	{
+		kernelFree(cHeader);
+		cHeader = nil;
+	}
+
+	cHeader = cDev->read(nil, sizeof(HelloMasterConfigHeader));
+}
+
+static void __hello_get_hmch(void* a0)
+{
+	if (a0 == nil)
+		return;
+
+	kernelPrintStr("Hello: returning header...\r");
+
+	struct HelloMasterConfigHeaderInput* in = a0;
+	in->fOutput								= cHeader;
+	in->fSizeOfOutput						= sizeof(in->fOutput);
+}
+
+static void __hello_unlink_device(void* a0)
+{
+	kernelPrintStr("Hello: shutting down...\r");
+
+	if (cDev)
+	{
+		cDev->write("+UNLINK", kernelStringLength("+UNLINK"));
+		cDev->wait();
+
+		/// here is my uuid and my config header. Please disconnect me.
+		cDev->write((void*)cDeviceUUID, kernelStringLength(cDeviceUUID));
+		cDev->write(cHeader, sizeof(cHeader));
+
+		cDev->wait();
+
+		kernelCloseDevice(cDev);
+		cDev = nil;
+	}
+
+	if (cDeviceUUID)
+	{
+		kernelFree((void*)cDeviceUUID);
+		cDeviceUUID = nil;
+	}
+
+	cDev = nil;
+}
+
+int __at_enter(void)
+{
+	kernelPrintStr("Hello: starting up Helloconf...\r");
+
+	cDeviceUUID = kernelAlloc(sizeof(char) * cHMCHDeviceLen);
+
+	kernelAddSyscall(0, __hello_link_device);
+	kernelAddSyscall(1, __hello_unlink_device);
+	kernelAddSyscall(2, __hello_get_hmch);
+
+	return 0;
+}
+
+int __at_exit(void)
+{
+	kernelPrintStr("Hello: starting up Helloconf...\r");
+
+	// first unlink.
+	__hello_unlink_device(nil);
+
+	// then unregister syscalls.
+	kernelAddSyscall(0, nil);
+	kernelAddSyscall(1, nil);
+
+	return 0;
+}