Secure virtual interface
US6883099B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | May 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/03
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network interface for secure virtual interface data communication includes a doorbell circuit, a processor, memory, and a bridge circuit. The doorbell circuit responds to physical I/O addresses of the host that are mapped by a memory management unit by a registration process. An application program seeking to use a channel of a virtual interface must register the virtual address of host memory where data for communication is or will be stored and register the virtual address of a page of I/O addresses. Access to the doorbell functions and to the host memory via the memory management unit are therefore denied when the requesting process identifier does not successfully compare with the process identifier for the process that performed the registrations. A password may be stored in the network interface in association with a virtual interface (VI) channel identifier and stored in association with the virtual to physical map used for VI communication. The network interface may abandon a requested or implied data communication function when passwords so not successfully compare. Methods for virtual interface (VI) communication performed by an application program may include one or mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.