QWZ(4)

NAME
qwz - Qualcomm IEEE 802.11a/ac/ax/b/g/n wireless network device

SYNOPSIS
qwz* at pci?

DESCRIPTION
The qwz driver provides support for Qualcomm Technologies WCN7850 802.11ax devices.

These are the modes the qwz driver can operate in:

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

The qwz driver can be configured to use Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA1 and WPA2). WPA2 is currently the most secure encryption standard for wireless networks supported by OpenBSD. 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_supplicant package. The qwz driver offloads both encryption and decryption of unicast data frames to the hardware for the CCMP cipher.

The qwz driver supports protected management frames (PMF) which prevents spoofing of management frames such as deauthentication, disassociation, and block-ack negotiation, on networks using WPA.

In BSS mode the driver supports background scanning; see ifconfig(8).

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

FILES
The driver needs the following firmware files, which are loaded when an interface is brought up:

/etc/firmware/qwz-wcn7850-hw2.0-amss
/etc/firmware/qwz-wcn7850-hw2.0-board-2
/etc/firmware/qwz-wcn7850-hw2.0-m3

These firmware files are not free because Qualcomm refuses to grant distribution rights without contractual obligations. As a result, even though OpenBSD includes the driver, the firmware files cannot be included and users have to download these files on their own.

A prepackaged version of the firmware can be installed using fw_update(8).

EXAMPLES
The following example scans for available networks:

    # ifconfig qwz0 scan

The following hostname.if(5) example configures qwz0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:

    join mynwid wpakey mywpakey
    inet autoconf

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

HISTORY
The qwz driver first appeared in OpenBSD 8.0.

CAVEATS
The qwz driver does not support any of the 802.11ac and 802.11ax capabilities offered by the hardware.

BUGS
Broadcast and Multicast frames are only received on networks which do not use encryption or which use WPA2 with the CCMP group cipher. This prevents ARP and IPv6 from working correctly on networks which use WEP encryption or WPA2 with the TKIP group cipher.