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

config ARCH_HAVE_PHY
	bool

if NET

choice
	prompt "Board PHY Selection"
	depends on ARCH_HAVE_PHY
	default PHY_KS8721
	---help---
		Identify the PHY on your board.  This setting is not used by all Ethernet
		drivers no do all Ethernet drivers support all PHYs.

config PHY_KS8721
	bool "Micrel KS8721 PHY"

config PHY_DP83848C
	bool "National Semiconduction DP83848C PHY"

config PHY_LAN8720
	bool "SMSC LAN8720 PHY"

config PHY_DM9161
	bool "Davicom DM9161 PHY"

endchoice

config NET_NOINTS
	bool "Not interrupt driven"
	default n
	---help---
		NET_NOINT indicates that uIP is 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"
	default 16
	---help---
		Maximum number of concurrent socket operations (recv, send, etc.).
		Default: 16

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.

menu "TCP/IP Networking"

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

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
	int "TCP/IP read-ahead buffer size"
	default 562
	---help---
		Read-ahead buffers allows buffering of TCP/IP packets when there is no
		receive in place to catch the TCP packet.  In that case, the packet
		will be retained in the NuttX read-ahead buffers.

		This setting specifies the size of one TCP/IP read-ahead buffer.
		This should best be a equal to the maximum packet size (NET_BUFSIZE).

config NET_NTCP_READAHEAD_BUFFERS
	int "Number of TCP/IP read-ahead buffers"
	default 8
	---help---
		Read-ahead buffers allows buffering of TCP/IP packets when there is no
		receive in place to catch the TCP packet.  In that case, the packet
		will be retained in the NuttX read-ahead buffers.

		This setting specifies the number of TCP/IP read-ahead buffers  This
		value can be set to zero to disable all TCP/IP read-ahead buffering.
		You might want to disable TCP/IP read-ahead buffering on a highly
		memory constained system that does not have any TCP/IP packet rate
		issues.

config NET_TCP_RECVDELAY
	int "TCP Rx delay"
	default 0
	---help---
		If NET_NTCP_READAHEAD_BUFFERS is zero, then there will be no buffering
		of TCP/IP packets:  Any TCP/IP packet received will be ACKed, but its contents
		will be dropped in the bit-bucket.

		One low-performance option is delay for a short period of time after a
		TCP/IP packet is received to see if another comes right behind it. Then
		the packet data from both can be combined.  This option only makes since
		if performance is not an issue and you need to handle short bursts of
		small, back-to-back packets.  The delay is in units of deciseconds.

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.

config NET_TCP_SPLIT
	bool "Enable packet splitting"
	default n
	---help---
		send() will not return until the the transfer has been ACKed by the
		recipient.  But under RFC 1122, the host need not ACK each packet
		immediately; the host may wait for 500 MS before ACKing.  This
		combination can cause very slow performance with small transfers are
		made to an RFC 1122 client.  However, the RFC 1122 must ACK at least
		every second (odd) packet.

		This option enables logic to trick the RFC 1122 host be exploiting
		this last RFC 1122 requirement:  If an odd number of packets were to
		be sent, then send() will split the last even packet to guarantee
		that an even number of packets will be sent and the RFC 1122 host
		will ACK the final packet immediately.

if NET_TCP_SPLIT

config NET_TCP_SPLIT_SIZE
	int "Split size threshold"
	default 40
	---help---
		Packets of this size or smaller than this will not be split.

endif
endif
endmenu

menu "UDP Networking"

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
endmenu

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"
	default 562
	---help---
		The size of the advertised receiver's window.   Should be set low
		(i.e., to the size of the NET_BUFSIZE) if the application is slow
		to process incoming data, or high (32768 bytes) if the application
		processes data quickly.

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_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
endif