306 lines
10 KiB
Text
306 lines
10 KiB
Text
menu "LWIP"
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config L2_TO_L3_COPY
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bool "Enable copy between Layer2 and Layer3 packets"
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default n
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help
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If this feature is enabled, all traffic from layer2(WIFI Driver) will be
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copied to a new buffer before sending it to layer3(LWIP stack), freeing
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the layer2 buffer.
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Please be notified that the total layer2 receiving buffer is fixed and
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ESP32 currently supports 25 layer2 receiving buffer, when layer2 buffer
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runs out of memory, then the incoming packets will be dropped in hardware.
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The layer3 buffer is allocated from the heap, so the total layer3 receiving
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buffer depends on the available heap size, when heap runs out of memory,
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no copy will be sent to layer3 and packet will be dropped in layer2.
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Please make sure you fully understand the impact of this feature before
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enabling it.
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config LWIP_MAX_SOCKETS
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int "Max number of open sockets"
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range 1 32
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default 10
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help
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Sockets take up a certain amount of memory, and allowing fewer
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sockets to be open at the same time conserves memory. Specify
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the maximum amount of sockets here. The valid value is from 1
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to 16.
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config LWIP_THREAD_LOCAL_STORAGE_INDEX
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int "Index for thread-local-storage pointer for lwip"
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default 0
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help
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Specify the thread-local-storage-pointer index for lwip
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use.
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config LWIP_SO_REUSE
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bool "Enable SO_REUSEADDR option"
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default n
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help
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Enabling this option allows binding to a port which remains in
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TIME_WAIT.
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config LWIP_SO_RCVBUF
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bool "Enable SO_RCVBUF option"
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default n
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help
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Enabling this option allows checking for available data on a netconn.
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config LWIP_DHCP_MAX_NTP_SERVERS
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int "Maximum number of NTP servers"
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default 1
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range 1 16
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help
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Set maximum number of NTP servers used by LwIP SNTP module.
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First argument of sntp_setserver/sntp_setservername functions
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is limited to this value.
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config LWIP_IP_FRAG
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bool "Enable fragment outgoing IP packets"
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default n
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help
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Enabling this option allows fragmenting outgoing IP packets if their size
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exceeds MTU.
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config LWIP_IP_REASSEMBLY
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bool "Enable reassembly incoming fragmented IP packets"
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default n
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help
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Enabling this option allows reassemblying incoming fragmented IP packets.
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config LWIP_STATS
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bool "Enable LWIP statistics"
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default n
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help
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Enabling this option allows LWIP statistics
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config LWIP_ETHARP_TRUST_IP_MAC
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bool "Enable LWIP ARP trust"
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default y
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help
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Enabling this option allows ARP table to be updated.
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If this option is enabled, the incoming IP packets cause the ARP table to be
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updated with the source MAC and IP addresses supplied in the packet.
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You may want to disable this if you do not trust LAN peers to have the
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correct addresses, or as a limited approach to attempt to handle
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spoofing. If disabled, lwIP will need to make a new ARP request if
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the peer is not already in the ARP table, adding a little latency.
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The peer *is* in the ARP table if it requested our address before.
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Also notice that this slows down input processing of every IP packet!
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config TCPIP_RECVMBOX_SIZE
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int "TCPIP receive mail box size"
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default 32
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range 6 64
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help
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Set TCPIP receive mail box size. Generally bigger value means higher throughput
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but more memory. The value should be bigger than UDP/TCP mail box size.
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menu "TCP"
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config TCP_MAXRTX
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int "Maximum number of retransmissions of data segments"
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default 12
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range 3 12
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help
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Set maximum number of retransmissions of data segments.
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config TCP_SYNMAXRTX
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int "Maximum number of retransmissions of SYN segments"
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default 6
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range 3 12
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help
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Set maximum number of retransmissions of SYN segments.
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config TCP_MSS
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int "Maximum Segment Size (MSS)"
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default 1436
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range 1220 1436
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help
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Set maximum segment size for TCP transmission.
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Can be set lower to save RAM, the default value 1436 will give best throughput.
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config TCP_MSL
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int "Maximum segment lifetime (MSL)"
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default 60000
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help
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Set maximum segment lifetime in in milliseconds.
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config TCP_SND_BUF_DEFAULT
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int "Default send buffer size"
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default 5744 # 4 * default MSS
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range 2440 65535
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help
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Set default send buffer size for new TCP sockets.
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Per-socket send buffer size can be changed at runtime
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with lwip_setsockopt(s, TCP_SNDBUF, ...).
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This value must be at least 2x the MSS size, and the default
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is 4x the default MSS size.
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Setting a smaller default SNDBUF size can save some RAM, but
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will decrease performance.
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config TCP_WND_DEFAULT
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int "Default receive window size"
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default 5744 # 4 * default MSS
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range 2440 65535
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help
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Set default TCP receive window size for new TCP sockets.
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Per-socket receive window size can be changed at runtime
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with lwip_setsockopt(s, TCP_WINDOW, ...).
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Setting a smaller default receive window size can save some RAM,
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but will significantly decrease performance.
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config TCP_RECVMBOX_SIZE
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int "Default TCP receive mail box size"
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default 6
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range 6 64
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help
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Set TCP receive mail box size. Generally bigger value means higher throughput
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but more memory. The recommended value is: TCP_WND_DEFAULT/TCP_MSS + 2, e.g. if
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TCP_WND_DEFAULT=14360, TCP_MSS=1436, then the recommended receive mail box size is
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(14360/1436 + 2) = 12.
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TCP receive mail box is a per socket mail box, when the application receives packets
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from TCP socket, LWIP core firstly posts the packets to TCP receive mail box and the
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application then fetches the packets from mail box. It means LWIP can caches maximum
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TCP_RECCVMBOX_SIZE packets for each TCP socket, so the maximum possible cached TCP packets
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for all TCP sockets is TCP_RECCVMBOX_SIZE multiples the maximum TCP socket number. In other
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words, the bigger TCP_RECVMBOX_SIZE means more memory.
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On the other hand, if the receiv mail box is too small, the mail box may be full. If the
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mail box is full, the LWIP drops the packets. So generally we need to make sure the TCP
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receive mail box is big enough to avoid packet drop between LWIP core and application.
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config TCP_QUEUE_OOSEQ
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bool "Queue incoming out-of-order segments"
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default y
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help
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Queue incoming out-of-order segments for later use.
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Disable this option to save some RAM during TCP sessions, at the expense
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of increased retransmissions if segments arrive out of order.
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choice TCP_OVERSIZE
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prompt "Pre-allocate transmit PBUF size"
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default TCP_OVERSIZE_MSS
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help
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Allows enabling "oversize" allocation of TCP transmission pbufs ahead of time,
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which can reduce the length of pbuf chains used for transmission.
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This will not make a difference to sockets where Nagle's algorithm
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is disabled.
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Default value of MSS is fine for most applications, 25% MSS may save
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some RAM when only transmitting small amounts of data. Disabled will
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have worst performance and fragmentation characteristics, but uses
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least RAM overall.
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config TCP_OVERSIZE_MSS
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bool "MSS"
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config TCP_OVERSIZE_QUARTER_MSS
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bool "25% MSS"
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config TCP_OVERSIZE_DISABLE
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bool "Disabled"
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endchoice
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endmenu # TCP
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menu "UDP"
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config UDP_RECVMBOX_SIZE
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int "Default UDP receive mail box size"
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default 6
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range 6 64
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help
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Set UDP receive mail box size. The recommended value is 6.
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UDP receive mail box is a per socket mail box, when the application receives packets
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from UDP socket, LWIP core firstly posts the packets to UDP receive mail box and the
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application then fetches the packets from mail box. It means LWIP can caches maximum
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UDP_RECCVMBOX_SIZE packets for each UDP socket, so the maximum possible cached UDP packets
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for all UDP sockets is UDP_RECCVMBOX_SIZE multiples the maximum UDP socket number. In other
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words, the bigger UDP_RECVMBOX_SIZE means more memory.
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On the other hand, if the receiv mail box is too small, the mail box may be full. If the
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mail box is full, the LWIP drops the packets. So generally we need to make sure the UDP
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receive mail box is big enough to avoid packet drop between LWIP core and application.
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endmenu # UDP
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config LWIP_DHCP_DOES_ARP_CHECK
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bool "Enable an ARP check on the offered address"
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default y
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help
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Enabling this option allows check if the offered IP address is not already
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in use by another host on the network.
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config TCPIP_TASK_STACK_SIZE
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int "TCP/IP Task Stack Size"
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default 2560
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help
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Configure TCP/IP task stack size, used by LWIP to process multi-threaded TCP/IP operations.
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The default is 2560 bytes, setting this stack too small will result in stack overflow crashes.
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menuconfig PPP_SUPPORT
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bool "Enable PPP support (new/experimental)"
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default n
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help
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Enable PPP stack. Now only PPP over serial is possible.
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PPP over serial support is experimental and unsupported.
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config PPP_PAP_SUPPORT
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bool "Enable PAP support"
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depends on PPP_SUPPORT
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default n
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help
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Enable Password Authentication Protocol (PAP) support
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config PPP_CHAP_SUPPORT
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bool "Enable CHAP support"
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depends on PPP_SUPPORT
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default n
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help
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Enable Challenge Handshake Authentication Protocol (CHAP) support
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config PPP_MSCHAP_SUPPORT
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bool "Enable MSCHAP support"
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depends on PPP_SUPPORT
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default n
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help
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Enable Microsoft version of the Challenge-Handshake Authentication Protocol (MSCHAP) support
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config PPP_MPPE_SUPPORT
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bool "Enable MPPE support"
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depends on PPP_SUPPORT
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default n
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help
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Enable Microsoft Point-to-Point Encryption (MPPE) support
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config PPP_DEBUG_ON
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bool "Enable PPP debug log output"
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depends on PPP_SUPPORT
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default n
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help
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Enable PPP debug log output
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menu "ICMP"
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config LWIP_MULTICAST_PING
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bool "Respond to multicast pings"
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default n
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config LWIP_BROADCAST_PING
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bool "Respond to broadcast pings"
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default n
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endmenu # ICMP
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endmenu
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