Operating System Support
The Microsoft Windows Network Driver Interface Specification (NDIS) API does not support any extensions for wireless monitor mode in older versions of Windows. With NDIS 6, available in Windows Vista and later versions of Windows, it is possible to enable monitor mode. NDIS 6 supports exposing 802.11 frames to the upper protocol levels; with previous versions of NDIS only fake Ethernet frames translated from the 802.11 data frames can be exposed to the upper protocol levels. Monitor mode support in NDIS 6 is an optional feature and may or may not be implemented in the client adapter driver. The implementation details and compliance with the NDIS specifications vary from vendor to vendor. In many cases, monitor mode support is not properly implemented by the vendor. For example, Ralink drivers report incorrect dBm readings and Realtek drivers do not include trailing 4-byte CRC values.
For versions of Windows prior to Windows Vista, some packet analyzer applications such as Wildpackets' OmniPeek provide their own device drivers to support monitor mode.
Linux's interfaces for 802.11 drivers support monitor mode and many drivers offer that support. FreeBSD, NetBSD, OpenBSD, and DragonFly BSD also provide an interface for 802.11 drivers that supports monitor mode, and many drivers for those operating systems support monitor mode as well. In Mac OS X 10.4 and later releases, the drivers for AirPort Extreme network adapters allow the adapter to be put into monitor mode. Libpcap 1.0.0 and later provides an API to select monitor mode when capturing on those operating systems.
Read more about this topic: Monitor Mode
Famous quotes containing the words operating, system and/or support:
“Go on then in doing with your pen what in other times was done with the sword; shew that reformation is more practicable by operating on the mind than on the body of man.”
—Thomas Jefferson (1743–1826)
“Nobody is glad in the gladness of another, and our system is one of war, of an injurious superiority. Every child of the Saxon race is educated to wish to be first. It is our system; and a man comes to measure his greatness by the regrets, envies, and hatreds of his competitors.”
—Ralph Waldo Emerson (1803–1882)
“She isn’t harassed. She’s busy, and it’s glamorous to be busy. Indeed, the image of the on- the-go working mother is very like the glamorous image of the busy top executive. The scarcity of the working mother’s time seems like the scarcity of the top executive’s time.... The analogy between the busy working mother and the busy top executive obscures the wage gap between them at work, and their different amounts of backstage support at home.”
—Arlie Hochschild (20th century)