doc: document DHCP server options in AP profiles

src/iwd.ap.rst

@@ -56,6 +56,54 @@ configuration.
 
        Passphrase to be used with this access point.
 
+DHCP Server Settings
+--------------------
+
+The group ``[IPv4]`` contains settings for IWD's built in DHCP server. All
+settings are optional.
+
+.. list-table::
+   :header-rows: 0
+   :stub-columns: 0
+   :widths: 20 80
+
+   * - Address
+     - IP Address of AP
+
+       Optional address for the DHCP server/access point. If provided this
+       address will be set on the AP interface and any other DHCP server options
+       will be derived from this address, unless they are overriden inside the
+       AP profile. If [IPv4].Address is not provided and no IP address is set
+       on the interface prior to calling StartProfile the IP pool will be used.
+
+   * - Gateway
+     - IP Address of gateway
+
+       IP address of gateway. This will inherit from [IPv4].Address if not
+       provided.
+
+   * - Netmask
+     - Netmask of DHCP server
+
+       This will be generated from [IPv4].Address if not provided.
+
+   * - DNSList
+     - List of DNS servers
+
+       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
+
+       Override the default lease time.
+
+   * - IPRange
+     - Range of IPs to use for the DHCP server
+
+       If not provided a default range will be chosen which is the DHCP server
+       address + 1 to 254.
+
 SEE ALSO
 ========