Detection of corrupted memory pointers within a packet-processing device
US7581163B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Mar 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1416
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are described for detecting corruption of buffer pointers passed between a local processor and a remote processor on a network device. For example, the first processor, which may be a memory controller, receives and stores packets within memory. A second processor, such as a host processor for the network device, is coupled to the first processor by a bus. The first processor communicates a memory pointer associated with an a given packet to the second processor for processing of the packet, and maintains a backup copy of the memory pointer. Upon receiving the memory pointer back from the second processor, the first processor compares at least a portion of the memory pointer received from the second processor with an equivalent portion of the copy of the memory pointer to determine whether the received memory pointer has been corrupted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.