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bd275172a8
This will allow a bunch of simplifications across the code base. Disabling NET is the equivalent of today's NO_NET choice. This means that if NET is enabled, either the legacy or lwIP stack is necessarily selected, which allows us to simplify if NET_LEGACY || NET_LWIP into if NET in a later commit. Config fragments - or defconfigs including other defconfigs - setting the network stack (NET_LEGACY or NET_LWIP) must also set NET (or unset NO_NET) if the config they apply to - or the included defconfigs - unsets NET (or selects NO_NET) as otherwise the NET_LEGACY and NET_LWIP symbols are unreachable. This is the case for the two defconfig modified in this commit. NO_NET is now a convenience symbol which hides NET entirely to avoid modifying many defconfigs. If one selected NO_NET to disable the networking stack in the past, this will still work for now. Technically, we should be using the "transitional" Kconfig attribute but that is only available since Kconfig from Linux kernel v6.18 and we're on 6.1 right now. Note that this moves CONFIG_SYS_RX_ETH_BUFFER from under the Network menu back into the main menu as it seems like it needs to be defined even when there's no need for NET support at all and menuconfig option doesn't work the same way as a menu. Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Peter Robinson <pbrobinson@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
292 lines
8.8 KiB
Plaintext
292 lines
8.8 KiB
Plaintext
#
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# Network configuration
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#
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config NO_NET
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bool "Disable networking"
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help
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Transitional variable. Equivalent to setting NET=n.
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menuconfig NET
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bool "Networking"
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depends on !NO_NET
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default y
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if NET
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choice
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prompt "Networking stack"
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default NET_LEGACY
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config NET_LEGACY
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bool "Legacy U-Boot networking stack"
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select NETDEVICES
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help
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Include networking support with U-Boot's internal implementation of
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the TCP/IP protocol stack.
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config NET_LWIP
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bool "Use lwIP for networking stack"
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select NETDEVICES
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help
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Include networking support based on the lwIP (lightweight IP)
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TCP/IP stack (https://nongnu.org/lwip). This is a replacement for
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the default U-Boot network stack and applications located in net/
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and enabled via CONFIG_NET_LEGACY as well as other pieces of code that
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depend on CONFIG_NET_LEGACY (such as cmd/net.c enabled via CONFIG_CMD_NET).
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Therefore the two symbols CONFIG_NET_LEGACY and CONFIG_NET_LWIP are mutually
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exclusive.
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endchoice
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if NET_LEGACY
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config ARP_TIMEOUT
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int "Milliseconds before trying ARP again"
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default 5000
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config NET_RETRY_COUNT
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int "Number of timeouts before giving up"
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default 5
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help
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This variable defines the number of retries for network operations
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like ARP, RARP, TFTP, or BOOTP before giving up the operation.
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config PROT_UDP
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bool "Enable generic udp framework"
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help
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Enable a generic udp framework that allows defining a custom
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handler for udp protocol.
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config BOOTP_SEND_HOSTNAME
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bool "Send hostname to DNS server"
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help
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Some DHCP servers are capable to do a dynamic update of a
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DNS server. To do this, they need the hostname of the DHCP
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requester.
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If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content
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of the "hostname" environment variable is passed as
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option 12 to the DHCP server.
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config NETCONSOLE
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bool "NetConsole support"
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help
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Support the 'nc' input/output device for networked console.
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See doc/usage/netconsole.rst for details.
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config IP_DEFRAG
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bool "Support IP datagram reassembly"
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help
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Selecting this will enable IP datagram reassembly according
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to the algorithm in RFC815.
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config NET_MAXDEFRAG
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int "Size of buffer used for IP datagram reassembly"
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depends on IP_DEFRAG
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default 16384
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range 1024 65536
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help
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This defines the size of the statically allocated buffer
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used for reassembly, and thus an upper bound for the size of
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IP datagrams that can be received.
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config TFTP_WINDOWSIZE
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int "TFTP window size"
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default 1
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help
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Default TFTP window size.
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RFC7440 defines an optional window size of transmits,
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before an ack response is required.
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The default TFTP implementation implies a window size of 1.
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config TFTP_TSIZE
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bool "Track TFTP transfers based on file size option"
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depends on CMD_TFTPBOOT
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default y if (ARCH_OMAP2PLUS || ARCH_K3 || ARCH_RENESAS)
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help
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By default, TFTP progress bar is increased for each received UDP
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frame, which can lead into long time being spent for sending
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data over the UART. Enabling this option, TFTP queries the file
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size from server, and if supported, limits the progress bar to
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50 characters total which fits on single line.
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config SERVERIP_FROM_PROXYDHCP
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bool "Get serverip value from Proxy DHCP response"
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help
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Allows bootfile config to be fetched from Proxy DHCP server
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while IP is obtained from main DHCP server.
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config SERVERIP_FROM_PROXYDHCP_DELAY_MS
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int "# of additional milliseconds to wait for ProxyDHCP response"
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default 100
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help
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Amount of additional time to wait for ProxyDHCP response after
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receiving response from main DHCP server. Has no effect if
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SERVERIP_FROM_PROXYDHCP is false.
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config KEEP_SERVERADDR
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bool "Write the server's MAC address to 'serveraddr'"
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default y if SANDBOX
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help
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Keeps the server's MAC address, in the env 'serveraddr'
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for passing to bootargs (like Linux's netconsole option). If this is
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enabled, when an ARP reply is received, the server's IP address is
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written there.
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config UDP_CHECKSUM
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bool "Check the UDP checksum"
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default y if SANDBOX
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help
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Enable this to verify the checksum on UDP packets. If the checksum
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is wrong then the packet is discarded and an error is shown, like
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"UDP wrong checksum 29374a23 30ff3826"
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config BOOTP_SERVERIP
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bool "Use the 'serverip' env var for tftp, not bootp"
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help
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Enable this if the TFTP server will be the 'serverip' environment
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variable, not the BOOTP server. This affects the operation of both
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bootp and tftp.
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config BOOTP_MAX_ROOT_PATH_LEN
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int "Option 17 root path length"
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default 64
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help
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Select maximal length of option 17 root path.
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config USE_GATEWAYIP
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bool "Set a default 'gateway' value in the environment"
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help
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Defines a default value for the IP address of the default router
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where packets to other networks are sent to. (Environment variable
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"gatewayip")
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config GATEWAYIP
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string "Value of the default 'gateway' value in the environment"
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depends on USE_GATEWAYIP
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config USE_IPADDR
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bool "Set a default 'ipaddr' value in the environment"
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help
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Define a default value for the IP address to use for the default
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Ethernet interface, in case this is not determined through e.g.
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bootp. (Environment variable "ipaddr")
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config IPADDR
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string "Value of the default 'ipaddr' value in the environment"
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depends on USE_IPADDR
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config USE_NETMASK
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bool "Set a default 'netmask' value in the environment"
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help
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Defines a default value for the subnet mask (or routing prefix) which
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is used to determine if an IP address belongs to the local subnet or
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needs to be forwarded through a router. (Environment variable "netmask")
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config NETMASK
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string "Value of the default 'netmask' value in the environment"
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depends on USE_NETMASK
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config USE_ROOTPATH
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bool "Set a default 'rootpath' value in the environment"
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config ROOTPATH
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string "Value of the default 'rootpath' value in the environment"
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depends on USE_ROOTPATH
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default "/opt/nfsroot"
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config USE_SERVERIP
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bool "Set a default 'serverip' value in the environment"
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help
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Defines a default value for the IP address of a TFTP server to
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contact when using the "tftboot" command. (Environment variable
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"serverip")
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config SERVERIP
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string "Value of the default 'serverip' value in the environment"
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depends on USE_SERVERIP
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config PROT_TCP
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bool "TCP stack"
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help
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Enable a generic tcp framework that allows defining a custom
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handler for tcp protocol.
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config PROT_TCP_SACK
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bool "TCP SACK support"
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depends on PROT_TCP
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help
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TCP protocol with SACK. SACK means selective acknowledgements.
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By turning this option on TCP will learn what segments are already
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received. So that it improves TCP's retransmission efficiency.
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This option should be turn on if you want to achieve the fastest
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file transfer possible.
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config IPV6
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bool "IPv6 support"
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help
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Enable IPv6 support. It includes Neighbour Discovery protocol, ICMPv6
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and auxiliary stuff to make it work. Since it is enabled u-boot
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network subsystem can get and handle incoming packets and send packets
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through IPv6 network. It allows to use environment variables such as
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ip6addr, serverip6. If a u-boot command is capable to parse an IPv6
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address and find it, it will force using IPv6 in the network stack.
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endif # if NET_LEGACY
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source "net/lwip/Kconfig"
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config BOOTDEV_ETH
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bool "Enable bootdev for ethernet"
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depends on BOOTSTD
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default y
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help
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Provide a bootdev for ethernet so that is it possible to boot
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an operating system over the network, using the PXE (Preboot
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Execution Environment) protocol.
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config NET_RANDOM_ETHADDR
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bool "Random ethaddr if unset"
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help
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Selecting this will allow the Ethernet interface to function even
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when the ethaddr variable for that interface is unset. In this case,
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a random MAC address in the locally administered address space is
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generated. It will be saved to the appropriate environment variable,
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too.
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config DNS
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bool "Enable DNS resolutions"
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select PROT_DNS_LWIP if NET_LWIP
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help
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Selecting this will allow the network stack to use server names
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in addition to IP addresses.
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config WGET
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bool "Enable wget"
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select PROT_TCP if NET_LEGACY
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select PROT_TCP_LWIP if NET_LWIP
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help
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Selecting this will enable wget, an interface to send HTTP requests
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via the network stack.
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config TFTP_BLOCKSIZE
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int "TFTP block size"
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default 1468
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help
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Default TFTP block size.
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The MTU is typically 1500 for ethernet, so a TFTP block of
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1468 (MTU minus eth.hdrs) provides a good throughput with
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almost-MTU block sizes.
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You can also activate CONFIG_IP_DEFRAG to set a larger block.
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endif # if NET
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config SYS_RX_ETH_BUFFER
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int "Number of receive packet buffers"
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default 4
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help
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Defines the number of Ethernet receive buffers. On some Ethernet
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controllers it is recommended to set this value to 8 or even higher,
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since all buffers can be full shortly after enabling the interface on
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high Ethernet traffic.
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