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of the scan API. The eventual aim is to have 'ieee80211_scan.c' have the net80211 and driver facing scan API to start, finish and continue doing scanning while 'ieee80211_swscan.c' implements the software scanner that runs the scan task, handles probe request/reply bits, configures the VAP off-channel, changes channel and does the scanning bits. For NICs that do no scanning at all, the existing code is needed. ath(4) and most of the other NICs (dumb USB ones in particular) do little to no scan offload - it's all done in software. Some NICs may do single channel at a time scanning; I haven't really checked them out in detail. iwn(4), the upcoming 7260 driver stuff, the new Qualcomm Atheros 11ac chipsets and the Atheros mobile/USB full-offload chips all have complete scan engines in firmware. We don't have to drive any of it at all - the firmware just needs to be told what to scan, when to scan, how long to scan. It'll take care of going off channel, pausing TX/RX appropriately, sending sleep notification to the AP, sending probe requests and handling probe responses. It'll do passive/active scan itself. It's almost completely transparent to the network stack - all we see are scan notifications when it finishes scanning each channel and beacons/probe responses when it does its thing. Once it's done we get a final notification that the scan is complete, with some scan results in the message. The iwn(4) NICs handle doing active scanning too as an option and will handle waiting appropriately on 5GHz passive channels before active scanning. There's some more refactoring, tidying up and lock assertions to sprinkle around to tidy this whole thing up before I turn swscan.c into another set of ic methods to override by the driver or alternate scan module. So in theory this is all one big no-op commit. In theory. Tested: * iwn(4) 5200, STA mode * ath(4) 6205, STA mode * ath(4) - various NICs, AP mode |
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| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html