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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#include <NetworkKit/IPC.h>
#include <KernelKit/KPC.h>
#include <KernelKit/ProcessScheduler.h>
namespace Kernel
{
/// @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.ProcessTeam = 0;
(*pckt_in)->IpcFrom.UserProcessID = 0;
(*pckt_in)->IpcFrom.ProcessTeam = 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 Kernel
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