Secure network optimizations when receiving data directly in...

Details Secure network optimizations when receiving data directly in... Secure network optimizations when receiving data directly in...

2011-06-21

2011-06-21

Ho, Andy (Department: 2194)

Electrical computers and digital processing systems: interprogra

Data transfer between operating systems

C719S327000, C718S001000

Reexamination Certificate

active

07966620

ABSTRACT:
Techniques are disclosed for increasing the security of a system where incoming network packets are directly placed into the memory space of a virtual machine (VM) operating system (OS) running on the system via direct memory access (DMA). In an embodiment, each packet is split into a first portion, which requires further processing, and a second portion, which may be immediately placed into the VM OS's memory address space. When the host OS running on the system completes processing the first portion, it places it directly before the second portion in the VM OS memory space and indicates to the VM OS that a packet is available. Techniques are further disclosed that mitigate the security risk in such systems related to VLAN ID configuration.

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