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BWFM(4)		       FreeBSD Kernel Interfaces Manual		       BWFM(4)

     bwfm -- Broadcom and Cypress IEEE 802.11a/ac/b/g/n	wireless network de-

     bwfm* at pci?
     bwfm* at sdmmc?
     bwfm* at usb?

     The bwfm driver provides support for Broadcom and Cypress FullMAC wire-
     less network adapters.

     The following table summarizes supported chipsets and their capabilities,
     as	well as	the bus	attachments recognized by the bwfm driver:

	   Chipset    Spectrum	  MIMO	  Bus
	   BCM43143   2GHz	  1x1	  SDMMC/USB
	   BCM43236   2GHz/5GHz	  2x2	  USB
	   BCM4324    2GHz/5GHz	  2x2	  SDMMC
	   BCM43242   2GHz/5GHz	  2x2	  USB
	   BCM4329    2GHz/5GHz	  2x2	  SDMMC
	   BCM4330    2GHz/5GHz	  2x2	  SDMMC
	   BCM4334    2GHz/5GHz	  2x2	  SDMMC
	   BCM43340   2GHz/5GHz	  1x1	  SDMMC
	   BCM43341   2GHz/5GHz	  1x1	  SDMMC
	   BCM4335    2GHz/5GHz	  1x1	  SDMMC
	   BCM43362   2GHz	  1x1	  SDMMC
	   BCM43364   2GHz	  1x1	  SDMMC
	   BCM4339    2GHz/5GHz	  1x1	  SDMMC
	   BCM43430   2GHz	  1x1	  SDMMC
	   BCM43455   2GHz/5GHz	  1x1	  SDMMC
	   BCM43456   2GHz/5GHz	  2x2	  SDMMC
	   BCM4350    2GHz/5GHz	  2x2	  PCI
	   BCM4354    2GHz/5GHz	  2x2	  SDMMC
	   BCM4356    2GHz/5GHz	  2x2	  PCI/SDMMC
	   BCM43569   2GHz/5GHz	  2x2	  USB
	   BCM43602   2GHz/5GHz	  3x3	  PCI
	   BCM4371    2GHz/5GHz	  2x2	  PCI

     These are the modes the bwfm driver can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when asso-
		    ciating with an access point, through which	all traffic
		    passes.  This mode is the default.

     Host AP	    In this mode the driver acts as an access point (base sta-
		    tion) for other cards.

     The bwfm driver can be configured to use Wired Equivalent Privacy (WEP)
     or	Wi-Fi Protected	Access (WPA1 and WPA2).	 WPA2 is the current encryp-
     tion standard for wireless	networks.  It is strongly recommended that
     neither WEP nor WPA1 are used as the sole mechanism to secure wireless
     communication, due	to serious weaknesses.	WPA1 is	disabled by default
     and may be	enabled	using the option "wpaprotos wpa1,wpa2".	 For standard
     WPA networks which	use pre-shared keys (PSK), keys	are configured using
     the "wpakey" option.  WPA-Enterprise networks require use of the wpa_sup-
     plicant package.  The bwfm	driver relies on the software 802.11 stack for
     the WPA handshake.	 Both encryption and decryption	of data	frames are
     handled by	the firmware.

     The firmware automatically	selects	the transmit speed and the channel de-
     pending on	the received signal strength.

     The bwfm driver can be configured at runtime with ifconfig(8) or on boot
     with hostname.if(5).

     The driver	needs a	firmware file which is loaded when the driver at-
     taches.  A	prepackaged version of the firmware can	be installed using

     The following example scans for available networks:

	   # ifconfig bwfm0 scan

     The following hostname.if(5) example configures bwfm0 to join network
     "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP:

	   nwid	mynwid wpakey mywpakey

     The following hostname.if(5) example creates a host-based access point on

	   mediaopt hostap
	   nwid	mynwid wpakey mywpakey

     arp(4), ifmedia(4), intro(4), netintro(4),	pci(4),	usb(4),
     hostname.if(5), ifconfig(8)

     The bwfm driver first appeared in OpenBSD 6.3.

     The bwfm driver was written by Patrick Wildt <>.

     The firmware is outdated and contains known vulnerabilities.

     This driver does not support powersave mode.

FreeBSD	13.0			 June 18, 2020			  FreeBSD 13.0


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