| # |
| # Network configuration |
| # |
| |
| menuconfig NET |
| bool "Networking support" |
| default y |
| |
| if NET |
| |
| config ARP_TIMEOUT |
| int "Milliseconds before trying ARP again" |
| default 5000 |
| |
| config NET_RETRY_COUNT |
| int "Number of timeouts before giving up" |
| default 5 |
| help |
| This variable defines the number of retries for network operations |
| like ARP, RARP, TFTP, or BOOTP before giving up the operation. |
| |
| config PROT_UDP |
| bool "Enable generic udp framework" |
| help |
| Enable a generic udp framework that allows defining a custom |
| handler for udp protocol. |
| |
| config BOOTDEV_ETH |
| bool "Enable bootdev for ethernet" |
| depends on BOOTSTD |
| default y |
| help |
| Provide a bootdev for ethernet so that is it possible to boot |
| an operationg system over the network, using the PXE (Preboot |
| Execution Environment) protocol. |
| |
| config BOOTP_SEND_HOSTNAME |
| bool "Send hostname to DNS server" |
| help |
| Some DHCP servers are capable to do a dynamic update of a |
| DNS server. To do this, they need the hostname of the DHCP |
| requester. |
| If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content |
| of the "hostname" environment variable is passed as |
| option 12 to the DHCP server. |
| |
| config NET_RANDOM_ETHADDR |
| bool "Random ethaddr if unset" |
| help |
| Selecting this will allow the Ethernet interface to function even |
| when the ethaddr variable for that interface is unset. In this case, |
| a random MAC address in the locally administered address space is |
| generated. It will be saved to the appropriate environment variable, |
| too. |
| |
| config NETCONSOLE |
| bool "NetConsole support" |
| help |
| Support the 'nc' input/output device for networked console. |
| See README.NetConsole for details. |
| |
| config IP_DEFRAG |
| bool "Support IP datagram reassembly" |
| help |
| Selecting this will enable IP datagram reassembly according |
| to the algorithm in RFC815. |
| |
| config NET_MAXDEFRAG |
| int "Size of buffer used for IP datagram reassembly" |
| depends on IP_DEFRAG |
| default 16384 |
| range 1024 65536 |
| help |
| This defines the size of the statically allocated buffer |
| used for reassembly, and thus an upper bound for the size of |
| IP datagrams that can be received. |
| |
| config SYS_FAULT_ECHO_LINK_DOWN |
| bool "Echo the inverted Ethernet link state to the fault LED" |
| help |
| Echo the inverted Ethernet link state to the fault LED. Note, if |
| this option is active, then CONFIG_SYS_FAULT_MII_ADDR also needs to |
| be configured. |
| |
| config TFTP_BLOCKSIZE |
| int "TFTP block size" |
| default 1468 |
| help |
| Default TFTP block size. |
| The MTU is typically 1500 for ethernet, so a TFTP block of |
| 1468 (MTU minus eth.hdrs) provides a good throughput with |
| almost-MTU block sizes. |
| You can also activate CONFIG_IP_DEFRAG to set a larger block. |
| |
| config TFTP_PORT |
| bool "Set TFTP UDP source/destination ports via the environment" |
| help |
| If this is defined, the environment variable tftpsrcp is used to |
| supply the TFTP UDP source port value. If tftpsrcp isn't defined, |
| the normal pseudo-random port number generator is used. |
| |
| Also, the environment variable tftpdstp is used to supply the TFTP |
| UDP destination port value. If tftpdstp isn't defined, the normal |
| port 69 is used. |
| |
| The purpose for tftpsrcp is to allow a TFTP server to blindly start |
| the TFTP transfer using the pre-configured target IP address and UDP |
| port. This has the effect of "punching through" the (Windows XP) |
| firewall, allowing the remainder of the TFTP transfer to proceed |
| normally. A better solution is to properly configure the firewall, |
| but sometimes that is not allowed. |
| |
| config TFTP_WINDOWSIZE |
| int "TFTP window size" |
| default 1 |
| help |
| Default TFTP window size. |
| RFC7440 defines an optional window size of transmits, |
| before an ack response is required. |
| The default TFTP implementation implies a window size of 1. |
| |
| config TFTP_TSIZE |
| bool "Track TFTP transfers based on file size option" |
| depends on CMD_TFTPBOOT |
| default y if (ARCH_OMAP2PLUS || ARCH_K3) |
| help |
| By default, TFTP progress bar is increased for each received UDP |
| frame, which can lead into long time being spent for sending |
| data over the UART. Enabling this option, TFTP queries the file |
| size from server, and if supported, limits the progress bar to |
| 50 characters total which fits on single line. |
| |
| config SERVERIP_FROM_PROXYDHCP |
| bool "Get serverip value from Proxy DHCP response" |
| help |
| Allows bootfile config to be fetched from Proxy DHCP server |
| while IP is obtained from main DHCP server. |
| |
| config SERVERIP_FROM_PROXYDHCP_DELAY_MS |
| int "# of additional milliseconds to wait for ProxyDHCP response" |
| default 100 |
| help |
| Amount of additional time to wait for ProxyDHCP response after |
| receiving response from main DHCP server. Has no effect if |
| SERVERIP_FROM_PROXYDHCP is false. |
| |
| config KEEP_SERVERADDR |
| bool "Write the server's MAC address to 'serveraddr'" |
| default y if SANDBOX |
| help |
| Keeps the server's MAC address, in the env 'serveraddr' |
| for passing to bootargs (like Linux's netconsole option). If this is |
| enabled, when an ARP reply is received, the server's IP address is |
| written there. |
| |
| config UDP_CHECKSUM |
| bool "Check the UDP checksum" |
| default y if SANDBOX |
| help |
| Enable this to verify the checksum on UDP packets. If the checksum |
| is wrong then the packet is discarded and an error is shown, like |
| "UDP wrong checksum 29374a23 30ff3826" |
| |
| config BOOTP_SERVERIP |
| bool "Use the 'serverip' env var for tftp, not bootp" |
| help |
| Enable this if the TFTP server will be the 'serverip' environment |
| variable, not the BOOTP server. This affects the operation of both |
| bootp and tftp. |
| |
| config BOOTP_MAX_ROOT_PATH_LEN |
| int "Option 17 root path length" |
| default 64 |
| help |
| Select maximal length of option 17 root path. |
| |
| config PROT_TCP |
| bool "TCP stack" |
| help |
| Enable a generic tcp framework that allows defining a custom |
| handler for tcp protocol. |
| |
| config PROT_TCP_SACK |
| bool "TCP SACK support" |
| depends on PROT_TCP |
| help |
| TCP protocol with SACK. SACK means selective acknowledgements. |
| By turning this option on TCP will learn what segments are already |
| received. So that it improves TCP's retransmission efficiency. |
| This option should be turn on if you want to achieve the fastest |
| file transfer possible. |
| |
| config IPV6 |
| bool "IPv6 support" |
| help |
| Enable IPv6 support. It includes Neighbour Discovery protocol, ICMPv6 |
| and auxiliary stuff to make it work. Since it is enabled u-boot |
| network subsystem can get and handle incoming packets and send packets |
| through IPv6 network. It allows to use environment variables such as |
| ip6addr, serverip6. If a u-boot command is capable to parse an IPv6 |
| address and find it, it will force using IPv6 in the network stack. |
| |
| endif # if NET |
| |
| config SYS_RX_ETH_BUFFER |
| int "Number of receive packet buffers" |
| default 4 |
| help |
| Defines the number of Ethernet receive buffers. On some Ethernet |
| controllers it is recommended to set this value to 8 or even higher, |
| since all buffers can be full shortly after enabling the interface on |
| high Ethernet traffic. |
