Automotive network switch with attack protection

US12332817B1 · kind B1 · utility

Assignee

• MARVELL ASIA PTE LTD · SG

Inventors

• Xiongzhi Ning · Karlsruhe, DE
• Markus Althoff · Achern, DE
• Biing Long Shu · Singapore, SG
• Steffen Dolling · Ditzingen, DE
• Sudong Yu · Singapore, SG
• Thomas Kniplitsch · Insheim, DE

Key dates

• Filing date: Feb 7, 2023
• Grant date: Jun 17, 2025
• Expiry date: Oct 21, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F21/85
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A network switch, for use in an Ethernet network in a vehicle, includes multiple ports, a switch unit, a peripheral bus, multiple DMA engines and a mapping engine. The ports connect to the Ethernet network. The switch unit forwards packets s among the ports. The peripheral bus connects to a host that runs host applications. The DMA engines transfer packets from the host applications via the peripheral bus to the switch unit. The mapping engine constructs a mapping that maps between (i) bus functions of the peripheral bus that are assigned to the host applications, and (ii) respective ones of the DMA engines, and configures the switch unit, in accordance with the mapping, to permit forwarding of a packet sent from a host application only upon verifying that a DMA engine that transferred the packet is mapped to the bus function assigned to the host application.