menuconfig LIBLWIP
	bool "lwip - Lightweight TCP/IP stack"
	default n
	select LIBNOLIBC if !HAVE_LIBC
	select LIBUKDEBUG
	select LIBUKSWRAND
	select HAVE_NW_STACK

if LIBLWIP
choice
	prompt "Version"
	default LWIP_UNIKRAFT21X
	help
		Select the version of the upstream lwIP stack
		sources that will be downloaded.
		Please note that you should run `make properclean`
		whenever you change the version.

config LWIP_RELEASE212
	bool "Release 2.1.2"
	help
		An official release from the lwIP community.

config LWIP_LATEST21X
	bool "Latest 2.1.x (unofficial)"
	help
		The latest available lwIP version from the 2.1
		release series that include recent bugfixes and
		security patches.
		Please note that there is a little chance that
		depending on the changes upstream, the Unikraft
		code could become incompatible. In such a case,
		we recommend to select a released and officially
		supported version instead.

config LWIP_UNIKRAFT21X
	bool "Unikraft 2.1.x (official)"
	help
		Unikraft official latest available and tested lwIP
		version. This version is based on the latest lwIP
		release from the 2.1 release series, includes some
		recent bugfixes and security patches, and includes
		latest features developed by the Unikraft community
		that are currently upstreamed to lwIP.
endchoice

menu "Netif drivers"
config LWIP_LOOPIF
	bool "Loop interface"
	default n
	select LWIP_LOOPBACK
	help
		A driver for localhost (e.g., 127.0.0.1) networking.
		Note: When lwIP is configured with mainloop mode, the
		loop interface needs to be polled manually (netif_poll()).

config LWIP_UKNETDEV
	bool "Unikraft Netdev Ethernet (libuknetdev)"
	default y
	select LIBUKNETDEV
	select LIBUKNETDEV_DISPATCHERTHREADS if LWIP_THREADS
	help
		A generic driver that operates network drivers through
		libuknetdev API.
		Note: When lwIP is configured with mainloop mode, receive
		interrupts are not enabled by this driver (there is also no
		receive interrupt handler registered).
		In case threaded mode is selected and the underlying device
		driver does not support receive interrupts the network
		interfaces have to be polled manually (uknetdev_poll()).

if LWIP_UKNETDEV
config LWIP_UKNETDEV_POLLONLY
       depends on LWIP_THREADS
       bool "Force polling mode (workaround)"
       default n
       help
		This option forces polling mode for uknetdev devices
		irrespective if the device supports interrupt-driven
		mode.
		Because this option always causes 100% CPU utilization
		it should be considered as workaround for cases where
		interrupt-based handling performs badly.
endif

config LWIP_UKNETDEV_SCRATCH
	int
	default 64
	help
		The network stack reserves space in the uknetdev device for its
		use. Please do not change this value and in case change this
		value please make sure it is sufficient enough to hold the
		lwip_netdev_data data structure.
endmenu

config LWIP_AUTOIFACE
	bool "Automatically attach netifs"
	default y
	help
		Automatically attach found network devices to the stack
		during initialization.

choice
	prompt "Operation mode"
	default LWIP_THREADS

config LWIP_NOTHREADS
	bool "Mainloop (non-threaded)"
	help
		No thread is created to operate the stack. The stack has to be
		called from the same context as all stack interactions. This
		includes polling network devices. The Socket API is unavailable.

config LWIP_THREADS
	bool "Threaded"
	select LIBUKSCHED
	select LIBUKMPI
	select LIBUKMPI_MBOX
	select LIBUKLOCK
	select LIBUKLOCK_SEMAPHORE
	select LIBUKLOCK_MUTEX
	help
		Creates a core thread for the stack.
endchoice

choice
    prompt "Stack input mailbox size"
    depends on LWIP_THREADS
	default LWIP_STACKTHREAD_MBOX_SIZE_256
    config LWIP_STACKTHREAD_MBOX_SIZE_32
        bool "32"
    config LWIP_STACKTHREAD_MBOX_SIZE_64
        bool "64"
    config LWIP_STACKTHREAD_MBOX_SIZE_128
        bool "128"
	config LWIP_STACKTHREAD_MBOX_SIZE_256
        bool "256"
    config LWIP_STACKTHREAD_MBOX_SIZE_512
        bool "512"
    config LWIP_STACKTHREAD_MBOX_SIZE_1024
        bool "1024"
	config LWIP_STACKTHREAD_MBOX_SIZE_2048
        bool "2048"
	help
		This sets the size for the input mailbox that is used for receiving traffic from the network
		interfaces.
endchoice

config LWIP_STACKTHREAD_MBOX_SIZE
    int
    default 32 if LWIP_STACKTHREAD_MBOX_SIZE_32
    default 64 if LWIP_STACKTHREAD_MBOX_SIZE_64
    default 128 if LWIP_STACKTHREAD_MBOX_SIZE_128
    default 256 if LWIP_STACKTHREAD_MBOX_SIZE_256
    default 512 if LWIP_STACKTHREAD_MBOX_SIZE_512
    default 1024 if LWIP_STACKTHREAD_MBOX_SIZE_1024
    default 2048 if LWIP_STACKTHREAD_MBOX_SIZE_2048

choice
	prompt "Memory allocation mode"
	default LWIP_HEAP

config LWIP_HEAP
	bool "Heap only"
	help
		Use default ukalloc allocator for all memory allocation requests

config LWIP_POOLS
	bool "Memory pools"
endchoice

config LWIP_NETIF_EXT_STATUS_CALLBACK
	bool "Netif extended status callback API"
	default y
	help
		Support extended status callbacks to netif related events.

config LWIP_NETIF_STATUS_PRINT
	bool "Print netif status updates"
	depends on LWIP_NETIF_EXT_STATUS_CALLBACK
	default y
	help
		Print netif status changes to standard console

config LWIP_LOOPBACK
	bool "Loopback traffic"
	default y
	help
		Support sending packets with a destination IP address
		that is equal to the netif IP address, looping them back
		up the stack.

config LWIP_IPV4
	bool "IPv4 support"
	default y

config LWIP_IPV6
	bool "IPv6 support"
	default n

menu "IP Configuration"
	depends on LWIP_IPV4 || LWIP_IPV6

config LWIP_IP_REASS_MAX_PBUFS
	int "Maximum number of fragments"
	default 10
	help
		This is the maximum number of IP fragments waiting to be
		reassembled.

endmenu

config LWIP_UDP
	bool "UDP support"
	default y

config LWIP_RAW
	bool "RAW support"
	default n
	help
		Enable the RAW address family (AF_RAW).  This option allows an
		application to be able to hook into the IP layer itself.

menuconfig LWIP_TCP
	bool "TCP support"
	default y

if LWIP_TCP
config LWIP_TCP_MSS
	int "Maximum segment size (bytes)"
	default 1460

config LWIP_WND_SCALE
	bool "Window scaling"
	default y

config LWIP_TCP_KEEPALIVE
	bool "Keepalive"
	default n

config LWIP_TCP_TIMESTAMPS
	bool "Timestamps"
	default n

config LWIP_NUM_TCPCON
	int "Maximum number of simultaneous TCP connections"
	default 64

config LWIP_NUM_TCPLISTENERS
	int "Maximum number of simultaneous TCP listeners"
	default 64
endif

config LWIP_ICMP
	bool "ICMP support"
	default y

config LWIP_IGMP
	bool "IGMP support"
	default n

config LWIP_SNMP
	bool "SNMP support"
	default n

config LWIP_DHCP
	bool "DHCP client"
	depends on LWIP_IPV4
	select LWIP_UDP
	default n
	help
		When LWIP_AUTOIFACE is used, the initialization routine will
		query the IPv4 addresses for the found devices from a DHCP
		server on network.

menuconfig LWIP_DNS
	bool "DNS Resolver"
	default y

if LWIP_DNS
config LWIP_DNS_MAX_SERVERS
	int "Maximum number of servers"
	default 2

config LWIP_DNS_TABLE_SIZE
	int "DNS table size"
	default 32
endif

menuconfig LWIP_SOCKET
	depends on LWIP_THREADS && (LWIP_UDP || LWIP_TCP)
	bool "Socket API"
	select LIBPOSIX_SOCKET
	default y

if LWIP_SOCKET
	config LWIP_UDP_RECVMBOX_FACTOR
		int "Factor for UDP recvmbox"
		depends on LWIP_UDP
		range 1 5
		default 2
		help
			How many times should the UDP recvmbox be bigger than the LWIP stackthread mbox size.
			Default 2, maximum 5.

	config LWIP_TCP_RECVMBOX_FACTOR
		int "Factor for TCP recvmbox"
		depends on LWIP_TCP
		range 1 5
		default 2
		help
			How many times should the TCP recvmbox be bigger than the LWIP stackthread mbox size.
			Default 2, maximum 5.
endif

menuconfig LWIP_DEBUG
	bool "Debug messages"
	default n
	help
		Enables debug messages on the debug console for selected lwIP
		message types.

if LWIP_DEBUG
config LWIP_MAINLOOP_DEBUG
	bool "Mainloop"
	default n
	help
		Enables TCP_IP_DEBUG, TIMERS_DEBUG

config LWIP_IF_DEBUG
	bool "Netif"
	default n
	help
		Enables ETHARP_DEBUG, NETIF_DEBUG

config LWIP_IP_DEBUG
	bool "IP"
	default n
	help
		Enables IP_DEBUG, IP6_DEBUG, IP_REASS_DEBUG

config LWIP_UDP_DEBUG
	bool "UDP"
	default n
	help
		Enables UDP_DEBUG

config LWIP_TCP_DEBUG
	bool "TCP"
	default n
	help
		Enables TCP_DEBUG, TCP_FR_DEBUG, TCP_RTO_DEBUG, TCP_CWND_DEBUG,
		TCP_WND_DEBUG, TCP_RST_DEBUG, TCP_QLEN_DEBUG, TCP_OUTPUT_DEBUG,
		TCP_INPUT_DEBUG

config LWIP_SYS_DEBUG
	bool "System"
	default n
	help
		Enables SYS_DEBUG, PBUF_DEBUG, MEM_DEBUG, MEMP_DEBUG

config LWIP_API_DEBUG
	bool "APIs"
	default n
	help
		Enables SOCKETS_DEBUG, RAW_DEBUG, API_MSG_DEBUG, API_LIB_DEBUG

config LWIP_SERVICE_DEBUG
	bool "Services"
	default n
	help
		Enables ETHARP_DEBUG, DNS_DEBUG, AUTOIP_DEBUG, DHCP_DEBUG,
		ICMP_DEBUG, SNMP_DEBUG, SNMP_MSG_DEBUG, SNMP_MIB_DEBUG
endif
endif