kernel: Use local error codes for kernel calls. So that we know which

process caused the error, and it's not global as well.

Signed-off-by: Amlal EL Mahrouss <amlalelmahrouss@icloud.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/Kernel/Sources/Network/IPCEP.cxx b/Kernel/Sources/Network/IPCEP.cxx
index e3a40fb9..0cd9d778 100644
--- a/Kernel/Sources/Network/IPCEP.cxx
+++ b/Kernel/Sources/Network/IPCEP.cxx
@@ -5,3 +5,39 @@
 ------------------------------------------- */
 
 #include <NetworkKit/IPCEP.hxx>
+
+using namespace NewOS;
+
+Bool ipc_sanitize_packet(IPCEPMessageHeader* pckt)
+{
+	if (!pckt) return false;
+
+	auto endian = DEDUCE_ENDIAN(pckt, ((char*)pckt)[0]);
+
+	switch (endian)
+	{
+	case Endian::kEndianBig:
+	{
+		if (pckt->IpcEndianess == eIPCEPLittleEndian)
+			return false;
+
+		break;
+	}
+	case Endian::kEndianLittle:
+	{
+		if (pckt->IpcEndianess == eIPCEPBigEndian)
+			return false;
+
+		break;
+	}
+	case Endian::kEndianMixed:
+		break;
+	default:
+		return false;
+	}
+
+	if (pckt->IpcFrom == pckt->IpcTo) return false;
+	if (pckt->IpcPacketSize > cIPCEPMsgSize) return false;
+
+	return pckt->IpcPacketSize > 1 && pckt->IpcHeaderMagic == cRemoteHeaderMagic;
+}