px4-firmware/nuttx/net/Kconfig

#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#

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

if NET

config NET_NOINTS
	bool "Not interrupt driven"
	default n
	---help---
		NET_NOINT indicates that uIP not called from the interrupt level. 
		If NET_NOINTS is defined, critical sections will be managed with semaphores;
		Otherwise, it assumed that uIP will be called from interrupt level handling
		and critical sections will be managed by enabling and disabling interrupts.

config NET_MULTIBUFFER
	bool "Use multiple device-side I/O buffers"
	default n
	---help---
		Traditionally, uIP has used a single buffer for all incoming and
		outgoing traffic.  If this configuration is selected, then the
		driver can manage multiple I/O buffers and can, for example,
		be filling one input buffer while sending another output buffer.
		Or, as another example, the driver may support queuing of concurrent
		input/ouput and output transfers for better performance.

config NET_IPv6
	bool "IPv6"
	default n
	---help---
		Build in support for IPv6.  Not fully implemented.

config NSOCKET_DESCRIPTORS
	int "Number of socket descriptor"
	default 8
	---help---
		Maximum number of socket descriptors per task/thread.

config NET_NACTIVESOCKETS
	int "Max socket operations"
	---help---
		Maximum number of concurrent socket operations (recv, send, etc.).
		Default: NET_TCP_CONNS+NET_UCP_CONNS

config NET_SOCKOPTS
	bool "Socket options"
	default n
	---help---
		Enable or disable support for socket options

config NET_BUFSIZE
	int "Network packet size"
	default 562 if !NET_TCP && NET_UDP && !NET_SLIP
	default 420 if NET_TCP && !NET_UDP && !NET_SLIP
	default 296 if NET_SLIP
	---help---
		uIP buffer size.  Default: 562

config NET_TCPURGDATA
	bool "Urgent data"
	default n
	---help---
		Determines if support for TCP urgent data notification should be
		compiled in. Urgent data (out-of-band data) is a rarely used TCP feature
		that is very seldom would be required.

config NET_TCP
	bool "TCP/IP Networking"
	default n
	---help---
		TCP support on or off

endif

if NET_TCP
config NET_TCP_CONNS
	int "Number of TCP/IP connections"
	default 8
	---help---
		Maximum number of TCP/IP connections (all tasks)

config NET_MAX_LISTENPORTS
	int "Number of listening ports"
	default 20
	---help---
		Maximum number of listening TCP/IP ports (all tasks).  Default: 20

config NET_TCP_READAHEAD_BUFSIZE
	bool "TCP/IP read-ahead buffer size"
	default 562
	---help---
		Size of TCP/IP read-ahead buffers

config NET_NTCP_READAHEAD_BUFFERS
	int "Number of TCP/IP read-ahead buffers"
	default 8
	---help---
		Number of TCP/IP read-ahead buffers (may be zero)

config NET_TCPBACKLOG
	bool "TCP/IP backlog support"
	default n
	---help---
		Incoming connections pend in a backlog until accept() is called.
		The size of the backlog is selected when listen() is called.

endif

config NET_UDP
	bool "UDP Networking"
	default n
	depends on NET
	---help---
		Enable or disable UDP networking support.

if NET_UDP
config NET_UDP_CHECKSUMS
	bool "UDP checksums"
	default n
	---help---
		Enable/disable UDP checksum support

config NET_UDP_CONNS
	int "Number of UDP sockets"
	default 8
	---help---
		The maximum amount of open concurrent UDP sockets

config NET_BROADCAST
	bool "UDP broadcast Rx support"
	default n
	---help---
		Incoming UDP broadcast support

endif

config NET_ICMP
	bool "ICMP networking support"
	default n
	depends on NET
	---help---
		Enable minimal ICMP support. Includes built-in support
		for sending replies to received ECHO (ping) requests.

if NET_ICMP
config NET_ICMP_PING
	bool "ICMP ping interfaces"
	default n
	---help---
		Provide interfaces to support application level support for
		for sending ECHO (ping) requests and associating ECHO replies.

config NET_PINGADDRCONF
	bool "Ping address configuration"
	default n
	---help---
		Use "ping" packet for setting IP address

endif

config NET_IGMP
	bool "IGMPv2 clientsupport"
	default n
	depends on NET
	---help---
		Enable IGMPv2 client support.

if NET_IGMP
config PREALLOC_IGMPGROUPS
	int "Number of pre-allocated IGMP groups"
	default 4
	---help---
		Pre-allocated IGMP groups are used only if needed from interrupt
		level group created (by the IGMP server). Default: 4.

endif

if NET

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

config NET_RECEIVE_WINDOW
	int "Receive window size"
	---help---
		The size of the advertised receiver's window

config NET_ARPTAB_SIZE
	int "ARP table size"
	default 16
	---help---
		The size of the ARP table

config NET_ARP_IPIN
	bool "ARP address harvesting"
	default n
	---help---
		Harvest IP/MAC address mappings from the ARP table
		from incoming IP packets.

config NET_MULTICAST
	bool "Multi-cast Tx support"
	default n
	---help---
		Outgoing multi-cast address support

config NET_FWCACHE_SIZE
	int "FW cache size"
	---help---
		Number of packets to remember when looking for duplicates

config NET_SLIP
	bool "SLIP support"
	default n
	---help---
		Enables building of the SLIP driver. SLIP requires
		at least one IP protocol selected and the following additional
		network settings: NET_NOINTS and NET_MULTIBUFFER.

		NET_BUFSIZE *must* be set to 296.  Other optional configuration
		settings that affect the SLIP driver: NET_STATISTICS. 
		Default: Ethernet

		SLIP supports point-to-point IP communications over a serial port.
		The default data link layer for uIP 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). 

endif
if NET_SLIP

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

config SLIP_STACKSIZE
	int "SLIP stack size"
	default 2048
	---help---
		Select the stack size of the SLIP RX and TX tasks.  Default: 2048

config SLIP_DEFPRIO
	int "SLIP priority"
	default 128
	---help---
		The priority of the SLIP RX and TX tasks. Default: 128

endif