net/Kconfig - nuttx - Git at Google

 #
 # For a description of the syntax of this configuration file,
 # see the file kconfig-language.txt in the NuttX tools repository.
 #

 config ARCH_HAVE_NET
 	bool
 	default n

 config ARCH_HAVE_PHY
 	bool
 	default n

 config ARCH_PHY_INTERRUPT
 	bool
 	default n

 config ARCH_PHY_POLLED
 	bool
 	default n

 config ARCH_HAVE_NETDEV_STATISTICS
 	bool
 	default n

 config ARCH_HAVE_NETDEV_TIMESTAMP
 	bool
 	default n

 config NET_WRITE_BUFFERS
 	bool
 	default n
 	select MM_IOB

 config NET_READAHEAD
 	bool
 	default n
 	select MM_IOB

 config NET_MCASTGROUP
 	bool
 	default n

 config NET
 	bool "Networking support"
 	default n
 	select ARCH_HAVE_NET
 	---help---
 		Enable or disable all network features

 if NET

 config NET_PROMISCUOUS
 	bool "Promiscuous mode"
 	default n
 	---help---
 		Force the Ethernet driver to operate in promiscuous mode (if supported
 		by the Ethernet driver).

 config NET_DEFAULT_MIN_PORT
 	int "Net Default Min Port"
 	range 1 65535
 	default 4096
 	---help---
 		Default Network min port

 config NET_DEFAULT_MAX_PORT
 	int "Net Default Max Port"
 	range NET_DEFAULT_MIN_PORT 65535
 	default 32000
 	---help---
 		Default Network max port

 menu "Driver buffer configuration"

 config NET_ETH_PKTSIZE
 	int "Ethernet packet buffer size"
 	default 1294 if NET_IPv6
 	default 590 if !NET_IPv6
 	range 1294 1518 if NET_IPv6
 	range 590 1518 if !NET_IPv6
 	depends on NET_ETHERNET
 	---help---
 		Packet buffer size.  This size includes the TCP/UDP payload plus the
 		size of TCP/UDP header, the IP header, and the Ethernet header.
 		This value is related to the MTU (Maximum Transmission Unit), except
 		that it includes the size of the link layer header; the payload is
 		the MSS (Maximum Segment Size).

 		IPv4 hosts are required to be able to handle an MSS of at least
 		536 octets, resulting in a minimum buffer size of 536+20+20+14 =
 		590.

 		IPv6 hosts are required to be able to handle an MSS of 1220 octets,
 		resulting in a minimum buffer size of 1220+20+40+14 = 1294

 		To get an MTU of 1500, for example, you would need packet buffer of
 		size 1514.

 config NET_SLIP_PKTSIZE
 	int "SLIP packet buffer size"
 	default 296
 	depends on NET_SLIP
 	range 296 1518
 	---help---
 		Provides the size of the SLIP packet buffers.  This size includes
 		the TCP/UDP payload plus the size of TCP/UDP header and the IP header.
 		This value is related to the MTU (Maximum Transmission Unit), except
 		that it includes the size of the link layer header; the payload is
 		the MSS (Maximum Segment Size).  SLIP has no link layer header so for
 		SLIP the MTU is the same as the PKTSIZE.

 		SLIP is required to support at least 256+20+20 = 296.  Values other than
 		296 are not recommended.

 		The Linux slip module hard-codes its MTU size to 296 (40 bytes for
 		the IP+TCP headers plus 256 bytes of data).  So you might as well
 		set CONFIG_NET_SLIP_PKTSIZE to 296 as well.

 		There may be an issue with this setting, however.  I see that Linux
 		uses a MTU of 296 and window of 256, but actually only sends 168
 		bytes of data: 40 + 128.  I believe that is to allow for the 2x
 		worst cast packet expansion.  Ideally we would like to advertise the
 		256 MSS, but restrict transfers to 128 bytes (possibly by modifying
 		the MSS value in the TCP connection structure).

 config NET_GUARDSIZE
 	int "Driver I/O guard size"
 	default 2
 	---help---
 		Network drivers often receive packets with garbage at the end and
 		are longer than the size of packet in the TCP header.  The following
 		"fudge" factor increases the size of the I/O buffering by a small
 		amount to allocate slightly oversize packets.  After receipt, the
 		packet size will be chopped down to the size indicated in the TCP
 		header.

 config NET_LL_GUARDSIZE
 	int "Data Link Layer(L2) Guard size of Network buffer(IOB)"
 	default 50 if RNDIS
 	default 16 if NET_CAN && NET_TIMESTAMP
 	default 14 if NET_ETHERNET
 	default 0
 	---help---
 		This is reserved l2 buffer header size of network buffer to isolate
 		the L2/L3 (MAC/IP) data on Network layer, which will be beneficial
 		to L3 network layer protocol transparent transmission and forwarding

 config NET_JUMBO_FRAME
 	bool "Net jumbo frame"
 	depends on IOB_ALLOC
 	default n
 	---help---
 		Optimize the sending of the JUMBO frame in network stack.

 config NET_RECV_BUFSIZE
 	int "Net Default Receive buffer size"
 	default 0
 	---help---
 		This is the default value for receive buffer size.

 config NET_MAX_RECV_BUFSIZE
 	int "Net Max Receive buffer size"
 	depends on NET_RECV_BUFSIZE > 0
 	default 0
 	---help---
 		Limit the max value for receive buffer size to avoid overconsumption.
 		Zero means no limit.

 config NET_SEND_BUFSIZE
 	int "Net Default Send buffer size"
 	depends on NET_TCP_WRITE_BUFFERS || NET_UDP_WRITE_BUFFERS
 	default 0
 	---help---
 		This is the default value for send buffer size.

 config NET_MAX_SEND_BUFSIZE
 	int "Net Max Send buffer size"
 	depends on NET_SEND_BUFSIZE > 0
 	default 0
 	---help---
 		Limit the max value for send buffer size to avoid overconsumption.
 		Zero means no limit.

 endmenu # Driver buffer configuration

 menu "Link layer support"

 config NET_ETHERNET
 	bool "Ethernet support"
 	default y
 	---help---
 		If NET_SLIP is not selected, then Ethernet will be used (there is
 		no need to define anything special in the configuration file to use
 		Ethernet -- it is the default).

 config NET_CELLULAR
 	bool "Cellular Link support"
 	default n
 	---help---
 		Add support for the cellular network device. Unlike Ethernet, cellular
 		network transmit pure IP packets.

 config NET_LOOPBACK
 	bool "Local loopback"
 	select ARCH_HAVE_NETDEV_STATISTICS
 	default n
 	---help---
 		Add support for the local network loopback device, lo.

 config NET_LOOPBACK_PKTSIZE
 	int "Loopback packet buffer size"
 	default 0
 	depends on NET_LOOPBACK
 	range 0 65535
 	---help---
 		The loopback driver packet buffer should be quite large.  The larger
 		the loopback packet buffer, the better will be TCP performance of
 		the loopback transfers.  The Linux loopback device historically used
 		packet buffers of size 16Kb, but that was increased in recent Linux
 		versions to 64Kb.  Those sizes may be excessive for resource
 		constrained MCUs, however.

 		The network enforces a lower limit that is the maximum packet size
 		of all enabled link layer protocols.  The default value of
 		CONFIG_NET_LOOPBACK_PKTSIZE is zero, meaning that this maximum
 		packet size will be used by loopback driver.

 menuconfig NET_MBIM
 	bool "MBIM modem support"
 	default n

 menuconfig NET_SLIP
 	bool "SLIP support"
 	select ARCH_HAVE_NETDEV_STATISTICS
 	depends on NET_IPv4
 	default n
 	---help---
 		Enables building of the SLIP driver. SLIP requires
 		at least one IP protocol selected.

 		SLIP supports point-to-point IP communications over a serial port.
 		The default link layer for network layer is Ethernet. If NET_SLIP
 		is defined in the NuttX configuration file, then SLIP will be
 		supported.  The basic differences between the SLIP and Ethernet
 		configurations is that when SLIP is selected:

 			* The link level header (that comes before the IP header) is omitted.
 			* All MAC address processing is suppressed.
 			* ARP is disabled.

 		If NET_SLIP is not selected, then Ethernet will be used (there is
 		no need to define anything special in the configuration file to use
 		Ethernet -- it is the default).

 if NET_SLIP

 config NET_SLIP_NINTERFACES
 	int "Number of SLIP interfaces"
 	default 1
 	---help---
 		Selects the number of physical SLIP
 		interfaces to support.
 		Default: 1

 endif # NET_SLIP

 menuconfig NET_TUN
 	bool "TUN Virtual Network Device support"
 	default n
 	depends on ALLOW_BSD_COMPONENTS
 	select ARCH_HAVE_NETDEV_STATISTICS

 if NET_TUN

 config TUN_NINTERFACES
 	int "Number of TUN interfaces"
 	default 1
 	range 1 8
 	---help---
 		Selects the number of TUN
 		interfaces to support.
 		Default: 1

 config NET_TUN_PKTSIZE
 	int "TUN packet buffer size"
 	default 296
 	range 296 1518
 	---help---
 		Provides the size of the TUN packet buffers.  This size includes
 		the TCP/UDP payload plus the size of TCP/UDP header and the IP header.
 		This value is related to the MTU (Maximum Transmission Unit), except
 		that it includes the size of the link layer header; the payload is
 		the MSS (Maximum Segment Size).  TUN has no link layer header so for
 		TUN the MTU is the same as the PKTSIZE.

 endif # NET_TUN

 config NETDEV_LATEINIT
 	bool "Late driver initialization"
 	default n
 	---help---
 		Normally, networking initialization occur in the later phase of the
 		boot process in the function up_initialize() when it calls the
 		driver initialization function, xxx_netinitialize().  This
 		initialization occurs after a sufficient amount of the OS has been
 		initialized so that driver registration can be performed, but
 		before the completion of OS initialization and before the first
 		application is started.

 		In a few situations, however, you may want to suppress this early
 		network driver initialization.  As examples:

 			- If you are using SLIP or PPPD, then there will be no network
 			  driver to be initialized,
 			- Certain multi-network configurations where a simple call to
 			  xxx_netinitialize() may be insufficient, and
 			- Situations where there are other board-level hardware
 			  dependencies so that the hardware is not in an appropriate
 			  state for xxx_netinitialize() to be called.

 		Examples of this latter situation include such things as network
 		drivers that required some setup via an I2C I/O expander, or network
 		drivers that depend on USB, SPI, I2C, PCI, serial, or other
 		interfaces that may not be ready when xxx_netinitialize() is normally
 		called.

 endmenu # Link layer support

 source "net/netdev/Kconfig"

 menu "Internet Protocol Selection"

 config NET_IPv4
 	bool "IPv4"
 	default y
 	---help---
 		Build in support for IPv4.

 config NET_IPv6
 	bool "IPv6"
 	default n
 	---help---
 		Build in support for IPv6.

 source "net/neighbor/Kconfig"

 menuconfig NET_6LOWPAN
 	bool "6LoWPAN support"
 	default n
 	select NETDEV_IOCTL
 	select NET_HAVE_STAR
 	depends on NET_IPv6
 	---help---
 		Enable support for Low power Wireless Personal Area Networking (6LoWPAN)
 		for IEEE 802.15.4 or other packet radios.

 source "net/sixlowpan/Kconfig"
 source "net/ipforward/Kconfig"
 source "net/nat/Kconfig"
 source "net/ipfilter/Kconfig"
 source "net/netfilter/Kconfig"
 source "net/ipfrag/Kconfig"

 endmenu # Internet Protocol Selection

 source "net/socket/Kconfig"
 source "net/inet/Kconfig"
 source "net/pkt/Kconfig"
 source "net/local/Kconfig"
 source "net/rpmsg/Kconfig"
 source "net/can/Kconfig"
 source "net/netlink/Kconfig"
 source "net/tcp/Kconfig"
 source "net/udp/Kconfig"
 source "net/bluetooth/Kconfig"
 source "net/ieee802154/Kconfig"
 source "net/icmp/Kconfig"
 source "net/icmpv6/Kconfig"
 source "net/mld/Kconfig"
 source "net/igmp/Kconfig"
 source "net/arp/Kconfig"
 source "net/procfs/Kconfig"
 source "net/usrsock/Kconfig"
 source "net/utils/Kconfig"

 config NET_STATISTICS
 	bool "Collect network statistics"
 	default n
 	---help---
 		Network layer statistics on or off

 config NET_HAVE_STAR
 	bool
 	default n
 	---help---
 		Automatically enabled if at least one selected L2 protocol supports
 		a STAR topology.  In order to support the star topology, the L2
 		protocol must support relaying all packets to a well-known hub node.

 menu "Network Topologies"

 config NET_STAR
 	bool "Enable star topology"
 	default n
 	depends on NET_HAVE_STAR && NET_IPv6
 	---help---
 		Enable support for a star network topology.

 		NOTE: Currently only supported by 6LoWPAN.
 		NOTE: L2 forwarding only supported for IPv6.

 choice
 	prompt "Node role"
 	depends on NET_STAR
 	default NET_STARPOINT
 	---help---
 		Specifies the role of this node in the star configuration.

 config NET_STARPOINT
 	bool "Point node in star"
 	---help---
 		The node is a "point" in the star configuration and must send all
 		packets to the star hub node.

 config NET_STARHUB
 	bool "Hub node of star"
 	select NET_IPFORWARD
 	---help---
 		This is the "hub" node in the star configurations.  It will receive
 		packets packets from all "point" nodes and perform L2 forwarding of
 		the packets that are not destined for this node.

 endchoice # Node role
 endmenu # Network Topologies

 source "net/route/Kconfig"

 endif # NET
	#
	# For a description of the syntax of this configuration file,
	# see the file kconfig-language.txt in the NuttX tools repository.
	#

	config ARCH_HAVE_NET
	bool
	default n

	config ARCH_HAVE_PHY
	bool
	default n

	config ARCH_PHY_INTERRUPT
	bool
	default n

	config ARCH_PHY_POLLED
	bool
	default n

	config ARCH_HAVE_NETDEV_STATISTICS
	bool
	default n

	config ARCH_HAVE_NETDEV_TIMESTAMP
	bool
	default n

	config NET_WRITE_BUFFERS
	bool
	default n
	select MM_IOB

	config NET_READAHEAD
	bool
	default n
	select MM_IOB

	config NET_MCASTGROUP
	bool
	default n

	config NET
	bool "Networking support"
	default n
	select ARCH_HAVE_NET
	---help---
	Enable or disable all network features

	if NET

	config NET_PROMISCUOUS
	bool "Promiscuous mode"
	default n
	---help---
	Force the Ethernet driver to operate in promiscuous mode (if supported
	by the Ethernet driver).

	config NET_DEFAULT_MIN_PORT
	int "Net Default Min Port"
	range 1 65535
	default 4096
	---help---
	Default Network min port

	config NET_DEFAULT_MAX_PORT
	int "Net Default Max Port"
	range NET_DEFAULT_MIN_PORT 65535
	default 32000
	---help---
	Default Network max port

	menu "Driver buffer configuration"

	config NET_ETH_PKTSIZE
	int "Ethernet packet buffer size"
	default 1294 if NET_IPv6
	default 590 if !NET_IPv6
	range 1294 1518 if NET_IPv6
	range 590 1518 if !NET_IPv6
	depends on NET_ETHERNET
	---help---
	Packet buffer size. This size includes the TCP/UDP payload plus the
	size of TCP/UDP header, the IP header, and the Ethernet header.
	This value is related to the MTU (Maximum Transmission Unit), except
	that it includes the size of the link layer header; the payload is
	the MSS (Maximum Segment Size).

	IPv4 hosts are required to be able to handle an MSS of at least
	536 octets, resulting in a minimum buffer size of 536+20+20+14 =
	590.

	IPv6 hosts are required to be able to handle an MSS of 1220 octets,
	resulting in a minimum buffer size of 1220+20+40+14 = 1294

	To get an MTU of 1500, for example, you would need packet buffer of
	size 1514.

	config NET_SLIP_PKTSIZE
	int "SLIP packet buffer size"
	default 296
	depends on NET_SLIP
	range 296 1518
	---help---
	Provides the size of the SLIP packet buffers. This size includes
	the TCP/UDP payload plus the size of TCP/UDP header and the IP header.
	This value is related to the MTU (Maximum Transmission Unit), except
	that it includes the size of the link layer header; the payload is
	the MSS (Maximum Segment Size). SLIP has no link layer header so for
	SLIP the MTU is the same as the PKTSIZE.

	SLIP is required to support at least 256+20+20 = 296. Values other than
	296 are not recommended.

	The Linux slip module hard-codes its MTU size to 296 (40 bytes for
	the IP+TCP headers plus 256 bytes of data). So you might as well
	set CONFIG_NET_SLIP_PKTSIZE to 296 as well.

	There may be an issue with this setting, however. I see that Linux
	uses a MTU of 296 and window of 256, but actually only sends 168
	bytes of data: 40 + 128. I believe that is to allow for the 2x
	worst cast packet expansion. Ideally we would like to advertise the
	256 MSS, but restrict transfers to 128 bytes (possibly by modifying
	the MSS value in the TCP connection structure).

	config NET_GUARDSIZE
	int "Driver I/O guard size"
	default 2
	---help---
	Network drivers often receive packets with garbage at the end and
	are longer than the size of packet in the TCP header. The following
	"fudge" factor increases the size of the I/O buffering by a small
	amount to allocate slightly oversize packets. After receipt, the
	packet size will be chopped down to the size indicated in the TCP
	header.

	config NET_LL_GUARDSIZE
	int "Data Link Layer(L2) Guard size of Network buffer(IOB)"
	default 50 if RNDIS
	default 16 if NET_CAN && NET_TIMESTAMP
	default 14 if NET_ETHERNET
	default 0
	---help---
	This is reserved l2 buffer header size of network buffer to isolate
	the L2/L3 (MAC/IP) data on Network layer, which will be beneficial
	to L3 network layer protocol transparent transmission and forwarding

	config NET_JUMBO_FRAME
	bool "Net jumbo frame"
	depends on IOB_ALLOC
	default n
	---help---
	Optimize the sending of the JUMBO frame in network stack.

	config NET_RECV_BUFSIZE
	int "Net Default Receive buffer size"
	default 0
	---help---
	This is the default value for receive buffer size.

	config NET_MAX_RECV_BUFSIZE
	int "Net Max Receive buffer size"
	depends on NET_RECV_BUFSIZE > 0
	default 0
	---help---
	Limit the max value for receive buffer size to avoid overconsumption.
	Zero means no limit.

	config NET_SEND_BUFSIZE
	int "Net Default Send buffer size"
	depends on NET_TCP_WRITE_BUFFERS \|\| NET_UDP_WRITE_BUFFERS
	default 0
	---help---
	This is the default value for send buffer size.

	config NET_MAX_SEND_BUFSIZE
	int "Net Max Send buffer size"
	depends on NET_SEND_BUFSIZE > 0
	default 0
	---help---
	Limit the max value for send buffer size to avoid overconsumption.
	Zero means no limit.

	endmenu # Driver buffer configuration

	menu "Link layer support"

	config NET_ETHERNET
	bool "Ethernet support"
	default y
	---help---
	If NET_SLIP is not selected, then Ethernet will be used (there is
	no need to define anything special in the configuration file to use
	Ethernet -- it is the default).

	config NET_CELLULAR
	bool "Cellular Link support"
	default n
	---help---
	Add support for the cellular network device. Unlike Ethernet, cellular
	network transmit pure IP packets.

	config NET_LOOPBACK
	bool "Local loopback"
	select ARCH_HAVE_NETDEV_STATISTICS
	default n
	---help---
	Add support for the local network loopback device, lo.

	config NET_LOOPBACK_PKTSIZE
	int "Loopback packet buffer size"
	default 0
	depends on NET_LOOPBACK
	range 0 65535
	---help---
	The loopback driver packet buffer should be quite large. The larger
	the loopback packet buffer, the better will be TCP performance of
	the loopback transfers. The Linux loopback device historically used
	packet buffers of size 16Kb, but that was increased in recent Linux
	versions to 64Kb. Those sizes may be excessive for resource
	constrained MCUs, however.

	The network enforces a lower limit that is the maximum packet size
	of all enabled link layer protocols. The default value of
	CONFIG_NET_LOOPBACK_PKTSIZE is zero, meaning that this maximum
	packet size will be used by loopback driver.

	menuconfig NET_MBIM
	bool "MBIM modem support"
	default n

	menuconfig NET_SLIP
	bool "SLIP support"
	select ARCH_HAVE_NETDEV_STATISTICS
	depends on NET_IPv4
	default n
	---help---
	Enables building of the SLIP driver. SLIP requires
	at least one IP protocol selected.

	SLIP supports point-to-point IP communications over a serial port.
	The default link layer for network layer is Ethernet. If NET_SLIP
	is defined in the NuttX configuration file, then SLIP will be
	supported. The basic differences between the SLIP and Ethernet
	configurations is that when SLIP is selected:

	* The link level header (that comes before the IP header) is omitted.
	* All MAC address processing is suppressed.
	* ARP is disabled.

	If NET_SLIP is not selected, then Ethernet will be used (there is
	no need to define anything special in the configuration file to use
	Ethernet -- it is the default).

	if NET_SLIP

	config NET_SLIP_NINTERFACES
	int "Number of SLIP interfaces"
	default 1
	---help---
	Selects the number of physical SLIP
	interfaces to support.
	Default: 1

	endif # NET_SLIP

	menuconfig NET_TUN
	bool "TUN Virtual Network Device support"
	default n
	depends on ALLOW_BSD_COMPONENTS
	select ARCH_HAVE_NETDEV_STATISTICS

	if NET_TUN

	config TUN_NINTERFACES
	int "Number of TUN interfaces"
	default 1
	range 1 8
	---help---
	Selects the number of TUN
	interfaces to support.
	Default: 1

	config NET_TUN_PKTSIZE
	int "TUN packet buffer size"
	default 296
	range 296 1518
	---help---
	Provides the size of the TUN packet buffers. This size includes
	the TCP/UDP payload plus the size of TCP/UDP header and the IP header.
	This value is related to the MTU (Maximum Transmission Unit), except
	that it includes the size of the link layer header; the payload is
	the MSS (Maximum Segment Size). TUN has no link layer header so for
	TUN the MTU is the same as the PKTSIZE.

	endif # NET_TUN

	config NETDEV_LATEINIT
	bool "Late driver initialization"
	default n
	---help---
	Normally, networking initialization occur in the later phase of the
	boot process in the function up_initialize() when it calls the
	driver initialization function, xxx_netinitialize(). This
	initialization occurs after a sufficient amount of the OS has been
	initialized so that driver registration can be performed, but
	before the completion of OS initialization and before the first
	application is started.

	In a few situations, however, you may want to suppress this early
	network driver initialization. As examples:

	- If you are using SLIP or PPPD, then there will be no network
	driver to be initialized,
	- Certain multi-network configurations where a simple call to
	xxx_netinitialize() may be insufficient, and
	- Situations where there are other board-level hardware
	dependencies so that the hardware is not in an appropriate
	state for xxx_netinitialize() to be called.

	Examples of this latter situation include such things as network
	drivers that required some setup via an I2C I/O expander, or network
	drivers that depend on USB, SPI, I2C, PCI, serial, or other
	interfaces that may not be ready when xxx_netinitialize() is normally
	called.

	endmenu # Link layer support

	source "net/netdev/Kconfig"

	menu "Internet Protocol Selection"

	config NET_IPv4
	bool "IPv4"
	default y
	---help---
	Build in support for IPv4.

	config NET_IPv6
	bool "IPv6"
	default n
	---help---
	Build in support for IPv6.

	source "net/neighbor/Kconfig"

	menuconfig NET_6LOWPAN
	bool "6LoWPAN support"
	default n
	select NETDEV_IOCTL
	select NET_HAVE_STAR
	depends on NET_IPv6
	---help---
	Enable support for Low power Wireless Personal Area Networking (6LoWPAN)
	for IEEE 802.15.4 or other packet radios.

	source "net/sixlowpan/Kconfig"
	source "net/ipforward/Kconfig"
	source "net/nat/Kconfig"
	source "net/ipfilter/Kconfig"
	source "net/netfilter/Kconfig"
	source "net/ipfrag/Kconfig"

	endmenu # Internet Protocol Selection

	source "net/socket/Kconfig"
	source "net/inet/Kconfig"
	source "net/pkt/Kconfig"
	source "net/local/Kconfig"
	source "net/rpmsg/Kconfig"
	source "net/can/Kconfig"
	source "net/netlink/Kconfig"
	source "net/tcp/Kconfig"
	source "net/udp/Kconfig"
	source "net/bluetooth/Kconfig"
	source "net/ieee802154/Kconfig"
	source "net/icmp/Kconfig"
	source "net/icmpv6/Kconfig"
	source "net/mld/Kconfig"
	source "net/igmp/Kconfig"
	source "net/arp/Kconfig"
	source "net/procfs/Kconfig"
	source "net/usrsock/Kconfig"
	source "net/utils/Kconfig"

	config NET_STATISTICS
	bool "Collect network statistics"
	default n
	---help---
	Network layer statistics on or off

	config NET_HAVE_STAR
	bool
	default n
	---help---
	Automatically enabled if at least one selected L2 protocol supports
	a STAR topology. In order to support the star topology, the L2
	protocol must support relaying all packets to a well-known hub node.

	menu "Network Topologies"

	config NET_STAR
	bool "Enable star topology"
	default n
	depends on NET_HAVE_STAR && NET_IPv6
	---help---
	Enable support for a star network topology.

	NOTE: Currently only supported by 6LoWPAN.
	NOTE: L2 forwarding only supported for IPv6.

	choice
	prompt "Node role"
	depends on NET_STAR
	default NET_STARPOINT
	---help---
	Specifies the role of this node in the star configuration.

	config NET_STARPOINT
	bool "Point node in star"
	---help---
	The node is a "point" in the star configuration and must send all
	packets to the star hub node.

	config NET_STARHUB
	bool "Hub node of star"
	select NET_IPFORWARD
	---help---
	This is the "hub" node in the star configurations. It will receive
	packets packets from all "point" nodes and perform L2 forwarding of
	the packets that are not destined for this node.

	endchoice # Node role
	endmenu # Network Topologies

	source "net/route/Kconfig"

	endif # NET