iwd/src/iwd.ap.rst

iwd.ap

Configuration of IWD access points

Author

James Prestwood <prestwoj@gmail.com>

Copyright

2020 Intel Corporation

Version

iwd

Date

20 October 2020

Manual section

5

Manual group

Linux Connectivity

NAME

iwd.ap - Access point provisioning files

SYNOPSIS

Description of access point provisioning files.

DESCRIPTION

An access point provisioning file defines the configuration of an IWD access point. These files live in $STATE_DIRECTORY/ap (/var/lib/iwd/ap by default). They are read when the net.connman.iwd.AccessPoint.StartProfile(ssid) DBus method is used.

FILE FORMAT

See iwd.network for details on the settings file syntax.

SETTINGS

The settings are split into several categories. Each category has a group associated with it and is described in the corresponding table below.

General Settings

The group [General] contains general AP configuration.

Channel	Channel number Optional channel number for the access point to operate on. If omitted the channel will be chosen automatically. Channels greater than or equal to 36 will select the 5GHz band for the AP to operate on. Note: Due to regulatory requirements the linux kernel does not allow or strictly limits 5GHz use in AP mode while in world roaming. These frequencies become available once the country is set, either via IWD's main.conf option [General].Country (see man iwd.config) or externally (e.g. iw reg set <CC>). If you are having trouble using 5GHz ensure the country is set, and that the desired frequency/channel is unrestricted.
RekeyTimeout	Timeout for PTK rekeys (seconds) The time interval at which the AP starts a rekey for a given station. If not provided a default value of 0 is used (rekeying is disabled).
DisableHT	Boolean value Explicitly disable HT capabilities for this AP.

Network Authentication Settings

The group [Security] contains settings for Wi-Fi security and authentication configuration.

Passphrase	8..63 character string WPA-PSK Passphrase to be used with this access point. At least one of Passphrase, PreSharedKey must be present.
PreSharedKey	64-character hex-string Processed passphrase for this network in the form of a hex-encoded 32-byte pre-shared key. Either this or Passphrase must be present.
PairwiseCiphers	Comma separated list of pairwise ciphers for the AP supports. Values can include: TKIP, CCMP, GCMP, GCMP-256, CCMP-256 The underlying hardware and IWD's AP implementation must also support the ciphers listed
GroupCipher	Group cipher the AP uses A single cipher value the AP can use as the group cipher. Values are the same as pairwise ciphers and the same restrictions apply (hardware and IWD implementation must support the cipher)

IPv4 Network Configuration

The group [IPv4] contains settings for IWD's built-in DHCP server. All settings are optional. They're used if network configuration was enabled as described in iwd.config(5). Omitting the [IPv4] group disables network configuration for this access point so if an all-defaults DHCP setup is desired, the group header line must still be present:

# Enable network configuration
[IPv4]

[other groups follow]

Address	Local IP address or a comma-separated list of prefix-notation addresses Optional local address pool for the access point and the DHCP server. If a single address is provided this address will be set on the AP interface and any other DHCP server options will be derived from it if not overridden by other settings below. If a list of addresses and prefix lengths is specified (in the <IP>/<prefix-len> format), a single subnet address will be selected from the available space each time this profile is started. The subnet size is based on the [IPv4].Netmask setting. If Address is not provided and no IP address is set on the interface prior to calling StartProfile the value of the main.conf [IPv4].APAddressPool setting will be inherited, which in turn defaults to 192.168.0.0/16. For example, if [IPv4].Netmask is set to 255.255.255.0 and this setting, or the global APAddressPool fallback, is set to 192.168.0.0/16, 10.0.0.0/22, IWD will select one of the 256 subnets with addresses in the 192.168.<0-255>.0/24 range or one of the 4 subnets with addresses in the 10.0.<0-3>.0/24 range, allowing 270 possible subnets. Defining an address pool larger than the desired subnet gives IWD a chance to avoid conflicts if other interfaces on the system use dynamically assigned addresses.
Gateway	IP Address of gateway IP address of the gateway to be advertised by DHCP. This will fall back to the local IP address if not provided.
Netmask	Local netmask of the AP Defaults to a 28-bit netmask if not provided.
DNSList	List of DNS servers as a comma-separated IP address list A list of DNS servers which will be advertised by the DHCP server. If not provided no DNS servers will be sent by the DHCP server.
LeaseTime	Time limit for DHCP leases in seconds Override the default lease time.
IPRange	Range of IPs given as two addresses separated by a comma From and to addresses of the range assigned to clients through DHCP. If not provided the range from local address + 1 to .254 will be used.

Wi-Fi Simple Configuration

The group [WSC] fine-tunes some Wi-Fi Simple Configuration local parameters (formerly known as WPS, Wi-Fi Protected Setup.)

DeviceName	1..32-character string Optional Device Name string for the AP to advertise as. Defaults to the SSID.
PrimaryDeviceType	Subcategory string or a 64-bit integer Optional Primary Device Type for the AP to advertise as. Defaults to PC computer. Can be specified as a lower-case WSC v2.0.5 subcategory string or a 64-bit integer encoding, from MSB to LSB: the 16-bit category ID, the 24-bit OUI, the 8-bit OUI type and the 16-bit subcategory ID.
AuthorizedMACs	Comma-separated MAC address list Optional list of Authorized MAC addresses for the WSC registrar to check on association. Each address is specified in the colon-hexadecimal notation. Defaults to no MAC-based checks.

SEE ALSO

iwd(8), iwd.network(5)