mirror of
https://github.com/AsahiLinux/u-boot
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b5712acb97
Fixes: d0253f7e5c ("doc: move README.NetConsole to HTML documentation")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
264 lines
8.5 KiB
Text
264 lines
8.5 KiB
Text
#
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# Network configuration
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#
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menuconfig NET
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bool "Networking support"
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default y
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if NET
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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 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 operationg system over the network, using the PXE (Preboot
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Execution Environment) 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 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 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 SYS_FAULT_ECHO_LINK_DOWN
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bool "Echo the inverted Ethernet link state to the fault LED"
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help
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Echo the inverted Ethernet link state to the fault LED. Note, if
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this option is active, then CONFIG_SYS_FAULT_MII_ADDR also needs to
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be configured.
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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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config TFTP_PORT
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bool "Set TFTP UDP source/destination ports via the environment"
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help
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If this is defined, the environment variable tftpsrcp is used to
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supply the TFTP UDP source port value. If tftpsrcp isn't defined,
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the normal pseudo-random port number generator is used.
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Also, the environment variable tftpdstp is used to supply the TFTP
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UDP destination port value. If tftpdstp isn't defined, the normal
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port 69 is used.
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The purpose for tftpsrcp is to allow a TFTP server to blindly start
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the TFTP transfer using the pre-configured target IP address and UDP
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port. This has the effect of "punching through" the (Windows XP)
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firewall, allowing the remainder of the TFTP transfer to proceed
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normally. A better solution is to properly configure the firewall,
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but sometimes that is not allowed.
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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)
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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
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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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