IPC interrupt endpoint

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Methods of KasperskyOS core endpoints

IPC interrupt endpoint

August 2, 2023

ID kernel_methods_ipc_intr

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This endpoint is intended for interrupting the Call() and Recv() locking system calls. (For example, this may be required to correctly terminate a process.)

Information about methods of the endpoint is provided in the table below.

Methods of the ipc.IPC endpoint (kl.core.IPC interface)

Method	Method purpose and parameters	Potential danger of the method
`CreateSyncObject`	Purpose Creates an IPC synchronization object. An IPC synchronization object is used to interrupt `Call()` and `Recv()` locking system calls in all threads of the current process. A `Call()` can be interrupted only when it is awaiting a `Recv()` call by the server. `Recv()` can be interrupted only when it is waiting to receive data from a client. The handle of an IPC synchronization object cannot be transferred to another process because the necessary flag for this operation is not set in the permissions mask of this handle. Parameters [out] `syncHandle` – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object. [out] `rc` – return code.	Allows the kernel memory to be used up by creating a multitude of objects within it.
`SetInterrupt`	Purpose Switches the defined IPC synchronization object to a state in which the `Call()` and `Recv()` system calls are interrupted. Parameters [in] `syncHandle` – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object. [out] `rc` – return code.	N/A
`ClearInterrupt`	Purpose Switches the defined IPC synchronization object to a state in which the `Call()` and `Recv()` system calls are not interrupted. Parameters [in] `syncHandle` – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object. [out] `rc` – return code.	N/A

Method

Method purpose and parameters

Potential danger of the method

CreateSyncObject

Purpose

Creates an IPC synchronization object.

An IPC synchronization object is used to interrupt Call() and Recv() locking system calls in all threads of the current process. A Call() can be interrupted only when it is awaiting a Recv() call by the server. Recv() can be interrupted only when it is waiting to receive data from a client.

The handle of an IPC synchronization object cannot be transferred to another process because the necessary flag for this operation is not set in the permissions mask of this handle.

Parameters

[out] syncHandle – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object.
[out] rc – return code.

Allows the kernel memory to be used up by creating a multitude of objects within it.

SetInterrupt

Purpose

Switches the defined IPC synchronization object to a state in which the Call() and Recv() system calls are interrupted.

Parameters

[in] syncHandle – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object.
[out] rc – return code.

N/A

ClearInterrupt

Purpose

Switches the defined IPC synchronization object to a state in which the Call() and Recv() system calls are not interrupted.

Parameters

[in] syncHandle – value whose binary representation consists of multiple fields, including a handle field and a handle permissions mask field. The handle identifies the IPC synchronization object.
[out] rc – return code.

N/A

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