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/* -------------------------------------------
Copyright ZKA Web Services Co.
------------------------------------------- */
#include <NetworkKit/IPC.h>
#include <KernelKit/LPC.h>
#include <KernelKit/UserProcessScheduler.h>
using namespace Kernel;
/// @internal
/// @brief The internal sanitize function.
Bool ipc_int_sanitize_packet(IPC_MESSAGE_STRUCT* pckt)
{
auto endian = cDeduceEndian(pckt, ((Char*)pckt)[0]);
switch (endian)
{
case Endian::kEndianBig: {
if (pckt->IpcEndianess == eIPCEPLittleEndian)
goto ipc_check_failed;
break;
}
case Endian::kEndianLittle: {
if (pckt->IpcEndianess == eIPCEPBigEndian)
goto ipc_check_failed;
break;
}
case Endian::kEndianMixed: {
if (pckt->IpcEndianess == eIPCEPMixedEndian)
goto ipc_check_failed;
break;
}
default:
goto ipc_check_failed;
}
if (pckt->IpcFrom == pckt->IpcTo ||
pckt->IpcPacketSize > cXPCOMMsgSize)
{
goto ipc_check_failed;
}
return pckt->IpcPacketSize > 1 && pckt->IpcHeaderMagic == cXPCOMHeaderMagic;
ipc_check_failed:
ErrLocal() = kErrorIPC;
return false;
}
namespace Kernel
{
/// @brief Sanitize packet function
/// @retval true packet is correct.
/// @retval false packet is incorrect and process has crashed.
Bool ipc_sanitize_packet(IPC_MESSAGE_STRUCT* pckt)
{
if (!pckt ||
!ipc_int_sanitize_packet(pckt))
{
UserProcessScheduler::The().CurrentProcess().Leak().Crash();
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_MESSAGE_STRUCT** pckt_in)
{
// don't do anything if it's valid already.
if (*pckt_in)
return true;
// crash process if the packet pointer of pointer is NULL.
if (!pckt_in)
{
UserProcessScheduler::The().CurrentProcess().Leak().Crash();
return false;
}
*pckt_in = new IPC_MESSAGE_STRUCT();
MUST_PASS((*pckt_in));
if (*pckt_in)
{
auto endian = cDeduceEndian((*pckt_in), ((Char*)(*pckt_in))[0]);
(*pckt_in)->IpcHeaderMagic = cXPCOMHeaderMagic;
(*pckt_in)->IpcEndianess = static_cast<UInt8>(endian);
(*pckt_in)->IpcPacketSize = sizeof(IPC_MESSAGE_STRUCT);
(*pckt_in)->IpcTo.UserProcessID = 0;
(*pckt_in)->IpcTo.UserProcessTeam = 0;
(*pckt_in)->IpcFrom.UserProcessID = Kernel::UserProcessScheduler::The().CurrentProcess().Leak().ProcessId;
(*pckt_in)->IpcFrom.UserProcessTeam = Kernel::UserProcessScheduler::The().CurrentTeam().mTeamId;
return true;
}
UserProcessScheduler::The().CurrentProcess().Leak().Crash();
return false;
}
} // namespace Kernel
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