[J-u-boot.git] / net / Kconfig

#
# 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.

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.
Commit	Line	Data
ed36323f MY	1	#
	2	# Network configuration
	3	#
	4
	5	menuconfig NET
	6	bool "Networking support"
3b3ea2c5	7	default y
ed36323f MY	8
	9	if NET
	10
5d4e863b TR	11	config ARP_TIMEOUT
	12	int "Milliseconds before trying ARP again"
	13	default 5000
	14
01d1b99c TR	15	config NET_RETRY_COUNT
	16	int "Number of timeouts before giving up"
	17	default 5
	18	help
	19	This variable defines the number of retries for network operations
	20	like ARP, RARP, TFTP, or BOOTP before giving up the operation.
	21
b43ea1bf PR	22	config PROT_UDP
	23	bool "Enable generic udp framework"
	24	help
	25	Enable a generic udp framework that allows defining a custom
	26	handler for udp protocol.
4fd8d077 SG	27
	28	config BOOTDEV_ETH
	29	bool "Enable bootdev for ethernet"
	30	depends on BOOTSTD
	31	default y
	32	help
	33	Provide a bootdev for ethernet so that is it possible to boot
	34	an operationg system over the network, using the PXE (Preboot
	35	Execution Environment) protocol.
b43ea1bf	36
3275f26b AF	37	config BOOTP_SEND_HOSTNAME
	38	bool "Send hostname to DNS server"
	39	help
	40	Some DHCP servers are capable to do a dynamic update of a
	41	DNS server. To do this, they need the hostname of the DHCP
	42	requester.
	43	If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content
	44	of the "hostname" environment variable is passed as
	45	option 12 to the DHCP server.
	46
bef1014b JH	47	config NET_RANDOM_ETHADDR
	48	bool "Random ethaddr if unset"
	49	help
381e6e54 MS	50	Selecting this will allow the Ethernet interface to function even
	51	when the ethaddr variable for that interface is unset. In this case,
	52	a random MAC address in the locally administered address space is
	53	generated. It will be saved to the appropriate environment variable,
	54	too.
bef1014b	55
26660748 BN	56	config NETCONSOLE
	57	bool "NetConsole support"
	58	help
	59	Support the 'nc' input/output device for networked console.
	60	See README.NetConsole for details.
	61
3f6bcdf6 MV	62	config IP_DEFRAG
3f6bcdf6 MV	63	bool "Support IP datagram reassembly"
3f6bcdf6 MV	64	help
	65	Selecting this will enable IP datagram reassembly according
	66	to the algorithm in RFC815.
	67
215df01d RV	68	config NET_MAXDEFRAG
	69	int "Size of buffer used for IP datagram reassembly"
	70	depends on IP_DEFRAG
	71	default 16384
	72	range 1024 65536
	73	help
	74	This defines the size of the statically allocated buffer
	75	used for reassembly, and thus an upper bound for the size of
	76	IP datagrams that can be received.
	77
1d5686ac TR	78	config SYS_FAULT_ECHO_LINK_DOWN
	79	bool "Echo the inverted Ethernet link state to the fault LED"
	80	help
	81	Echo the inverted Ethernet link state to the fault LED. Note, if
	82	this option is active, then CONFIG_SYS_FAULT_MII_ADDR also needs to
	83	be configured.
	84
b618b370 MV	85	config TFTP_BLOCKSIZE
b618b370 MV	86	int "TFTP block size"
16cdc2da	87	default 1468
b618b370 MV	88	help
b618b370 MV	89	Default TFTP block size.
421de7fe PD	90	The MTU is typically 1500 for ethernet, so a TFTP block of
	91	1468 (MTU minus eth.hdrs) provides a good throughput with
	92	almost-MTU block sizes.
	93	You can also activate CONFIG_IP_DEFRAG to set a larger block.
b618b370	94
5842c810 TR	95	config TFTP_PORT
	96	bool "Set TFTP UDP source/destination ports via the environment"
	97	help
	98	If this is defined, the environment variable tftpsrcp is used to
	99	supply the TFTP UDP source port value. If tftpsrcp isn't defined,
	100	the normal pseudo-random port number generator is used.
	101
	102	Also, the environment variable tftpdstp is used to supply the TFTP
	103	UDP destination port value. If tftpdstp isn't defined, the normal
	104	port 69 is used.
	105
	106	The purpose for tftpsrcp is to allow a TFTP server to blindly start
	107	the TFTP transfer using the pre-configured target IP address and UDP
	108	port. This has the effect of "punching through" the (Windows XP)
	109	firewall, allowing the remainder of the TFTP transfer to proceed
	110	normally. A better solution is to properly configure the firewall,
	111	but sometimes that is not allowed.
	112
cc6b87ec RF	113	config TFTP_WINDOWSIZE
	114	int "TFTP window size"
	115	default 1
	116	help
	117	Default TFTP window size.
	118	RFC7440 defines an optional window size of transmits,
	119	before an ack response is required.
	120	The default TFTP implementation implies a window size of 1.
	121
2509493c TK	122	config TFTP_TSIZE
	123	bool "Track TFTP transfers based on file size option"
	124	depends on CMD_TFTPBOOT
	125	default y if (ARCH_OMAP2PLUS \|\| ARCH_K3)
	126	help
	127	By default, TFTP progress bar is increased for each received UDP
	128	frame, which can lead into long time being spent for sending
	129	data over the UART. Enabling this option, TFTP queries the file
	130	size from server, and if supported, limits the progress bar to
	131	50 characters total which fits on single line.
	132
c8e251f8 LF	133	config SERVERIP_FROM_PROXYDHCP
	134	bool "Get serverip value from Proxy DHCP response"
	135	help
	136	Allows bootfile config to be fetched from Proxy DHCP server
	137	while IP is obtained from main DHCP server.
	138
	139	config SERVERIP_FROM_PROXYDHCP_DELAY_MS
	140	int "# of additional milliseconds to wait for ProxyDHCP response"
	141	default 100
	142	help
	143	Amount of additional time to wait for ProxyDHCP response after
	144	receiving response from main DHCP server. Has no effect if
	145	SERVERIP_FROM_PROXYDHCP is false.
	146
3df6cd4d SG	147	config KEEP_SERVERADDR
	148	bool "Write the server's MAC address to 'serveraddr'"
	149	default y if SANDBOX
	150	help
	151	Keeps the server's MAC address, in the env 'serveraddr'
	152	for passing to bootargs (like Linux's netconsole option). If this is
	153	enabled, when an ARP reply is received, the server's IP address is
	154	written there.
	155
4b37fd14 SG	156	config UDP_CHECKSUM
4b37fd14 SG	157	bool "Check the UDP checksum"
d6b318de	158	default y if SANDBOX
4b37fd14 SG	159	help
4b37fd14 SG	160	Enable this to verify the checksum on UDP packets. If the checksum
3c07d639	161	is wrong then the packet is discarded and an error is shown, like
4b37fd14 SG	162	"UDP wrong checksum 29374a23 30ff3826"
4b37fd14 SG	163
d3877fba SG	164	config BOOTP_SERVERIP
	165	bool "Use the 'serverip' env var for tftp, not bootp"
	166	help
	167	Enable this if the TFTP server will be the 'serverip' environment
	168	variable, not the BOOTP server. This affects the operation of both
	169	bootp and tftp.
	170
5e6e41b3 AK	171	config BOOTP_MAX_ROOT_PATH_LEN
	172	int "Option 17 root path length"
	173	default 64
	174	help
	175	Select maximal length of option 17 root path.
	176
ed36323f	177	endif # if NET
0b956e39 TR	178
	179	config SYS_RX_ETH_BUFFER
	180	int "Number of receive packet buffers"
	181	default 4
	182	help
	183	Defines the number of Ethernet receive buffers. On some Ethernet
	184	controllers it is recommended to set this value to 8 or even higher,
	185	since all buffers can be full shortly after enabling the interface on
	186	high Ethernet traffic.