From a13e1c0911c0627184bc38f18c7fdda64447b3ad Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Date: Sun, 23 Mar 2025 19:13:48 +0100
Subject: meta(kernel): Reworked repository's filesystem structure.

Removing useless parts of the project too.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
---
 dev/kernel/src/Network/IPCMsg.cc | 125 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 dev/kernel/src/Network/IPCMsg.cc

(limited to 'dev/kernel/src/Network/IPCMsg.cc')

diff --git a/dev/kernel/src/Network/IPCMsg.cc b/dev/kernel/src/Network/IPCMsg.cc
new file mode 100644
index 00000000..f5bec6f7
--- /dev/null
+++ b/dev/kernel/src/Network/IPCMsg.cc
@@ -0,0 +1,125 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#include <NetworkKit/IPC.h>
+#include <KernelKit/LPC.h>
+#include <KernelKit/UserProcessScheduler.h>
+
+namespace NeOS
+{
+	/// @internal internal use for IPC system only.
+	/// @brief The internal sanitize function.
+	Bool ipc_int_sanitize_packet(IPC_MSG* pckt)
+	{
+		auto endian = RTL_ENDIAN(pckt, ((Char*)pckt)[0]);
+
+		switch (endian)
+		{
+		case Endian::kEndianBig: {
+			if (pckt->IpcEndianess == kIPCLittleEndian)
+				goto ipc_check_failed;
+
+			break;
+		}
+		case Endian::kEndianLittle: {
+			if (pckt->IpcEndianess == kIPCBigEndian)
+				goto ipc_check_failed;
+
+			break;
+		}
+		case Endian::kEndianMixed: {
+			if (pckt->IpcEndianess == kIPCMixedEndian)
+				goto ipc_check_failed;
+
+			break;
+		}
+		default:
+			goto ipc_check_failed;
+		}
+
+		if (pckt->IpcFrom == pckt->IpcTo ||
+			pckt->IpcPacketSize > kIPCMsgSize)
+		{
+			goto ipc_check_failed;
+		}
+
+		return pckt->IpcPacketSize > 1 && pckt->IpcHeaderMagic == kIPCHeaderMagic;
+
+	ipc_check_failed:
+		err_local_get() = kErrorIPC;
+		return false;
+	}
+
+	/// @brief Sanitize packet function
+	/// @retval true packet is correct.
+	/// @retval false packet is incorrect and process has crashed.
+	Bool ipc_sanitize_packet(IPC_MSG* pckt)
+	{
+		if (!pckt ||
+			!ipc_int_sanitize_packet(pckt))
+		{
+			return false;
+		}
+
+		return true;
+	}
+
+	/// @brief Construct packet function
+	/// @retval true packet is correct.
+	/// @retval false packet is incorrect and process has crashed.
+	Bool ipc_construct_packet(_Output IPC_MSG** pckt_in)
+	{
+		// don't act if it's not even valid.
+		if (!pckt_in)
+			return false;
+
+		if (!*pckt_in)
+			*pckt_in = new IPC_MSG();
+
+		MUST_PASS(*pckt_in);
+
+		if (*pckt_in)
+		{
+			const auto endianess = RTL_ENDIAN((*pckt_in), ((Char*)(*pckt_in))[0]);
+
+			(*pckt_in)->IpcHeaderMagic = kIPCHeaderMagic;
+
+			(*pckt_in)->IpcEndianess  = static_cast<UInt8>(endianess);
+			(*pckt_in)->IpcPacketSize = sizeof(IPC_MSG);
+
+			(*pckt_in)->IpcTo.UserProcessID	  = 0;
+			(*pckt_in)->IpcTo.UserProcessTeam = 0;
+
+			(*pckt_in)->IpcFrom.UserProcessID	= 0;
+			(*pckt_in)->IpcFrom.UserProcessTeam = 0;
+
+			return Yes;
+		}
+
+		return No;
+	}
+
+	/// @brief Pass message from **src** to **target**
+	/// @param src Source message.
+	/// @param target Target message.
+	Bool IPC_MSG::Pass(IPC_MSG* src, IPC_MSG* target) noexcept
+	{
+		if (src && target && (target != src))
+		{
+			if (src->IpcMsgSz > target->IpcMsgSz)
+				return No;
+
+			if (target->IpcMsgSz > src->IpcMsgSz)
+				return No;
+
+			rt_copy_memory(src->IpcData, target->IpcData, src->IpcMsgSz);
+
+			return Yes;
+		}
+
+		return No;
+	}
+} // namespace NeOS
-- 
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