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cc6b87ecaa
Add support for RFC 7440: "TFTP Windowsize Option". This optional feature allows the client and server to negotiate a window size of consecutive blocks to send as an alternative for replacing the single-block lockstep schema. windowsize can be defined statically during compilation by setting CONFIG_TFTP_WINDOWSIZE, or defined in runtime by setting an environment variable: "tftpwindowsize" If not defined, the windowsize is set to 1, meaning that it behaves as it was never defined. Choosing the appropriate windowsize depends on the specific network topology, underlying NIC. You should test various windowsize scenarios and see which best work for you. Setting a windowsize too big can actually decreases performance. Signed-off-by: Ramon Fried <rfried.dev@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de>
72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
#
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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 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
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even when the ethaddr variable for that interface is unset.
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A new MAC address will be generated on every boot and it will
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not be added to the environment.
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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 README.NetConsole for details.
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config IP_DEFRAG
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bool "Support IP datagram reassembly"
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default n
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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_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_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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endif # if NET
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