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- menu "LWIP"
- config L2_TO_L3_COPY
- bool "Enable copy between Layer2 and Layer3 packets"
- default n
- help
- If this feature is enabled, all traffic from layer2(WIFI Driver) will be
- copied to a new buffer before sending it to layer3(LWIP stack), freeing
- the layer2 buffer.
- Please be notified that the total layer2 receiving buffer is fixed and
- ESP32 currently supports 25 layer2 receiving buffer, when layer2 buffer
- runs out of memory, then the incoming packets will be dropped in hardware.
- The layer3 buffer is allocated from the heap, so the total layer3 receiving
- buffer depends on the available heap size, when heap runs out of memory,
- no copy will be sent to layer3 and packet will be dropped in layer2.
- Please make sure you fully understand the impact of this feature before
- enabling it.
- config LWIP_MAX_SOCKETS
- int "Max number of open sockets"
- range 1 32
- default 10
- help
- Sockets take up a certain amount of memory, and allowing fewer
- sockets to be open at the same time conserves memory. Specify
- the maximum amount of sockets here. The valid value is from 1
- to 16.
- config LWIP_THREAD_LOCAL_STORAGE_INDEX
- int "Index for thread-local-storage pointer for lwip"
- default 0
- help
- Specify the thread-local-storage-pointer index for lwip
- use.
- config LWIP_SO_REUSE
- bool "Enable SO_REUSEADDR option"
- default n
- help
- Enabling this option allows binding to a port which remains in
- TIME_WAIT.
- config LWIP_SO_RCVBUF
- bool "Enable SO_RCVBUF option"
- default n
- help
- Enabling this option allows checking for available data on a netconn.
- config LWIP_DHCP_MAX_NTP_SERVERS
- int "Maximum number of NTP servers"
- default 1
- range 1 16
- help
- Set maximum number of NTP servers used by LwIP SNTP module.
- First argument of sntp_setserver/sntp_setservername functions
- is limited to this value.
- config LWIP_IP_FRAG
- bool "Enable fragment outgoing IP packets"
- default n
- help
- Enabling this option allows fragmenting outgoing IP packets if their size
- exceeds MTU.
- config LWIP_IP_REASSEMBLY
- bool "Enable reassembly incoming fragmented IP packets"
- default n
- help
- Enabling this option allows reassemblying incoming fragmented IP packets.
- config TCP_MAXRTX
- int "Maximum number of retransmissions of data segments"
- default 12
- range 3 12
- help
- Set maximum number of retransmissions of data segments.
- config TCP_SYNMAXRTX
- int "Maximum number of retransmissions of SYN segments"
- default 6
- range 3 12
- help
- Set maximum number of retransmissions of SYN segments.
- config LWIP_DHCP_DOES_ARP_CHECK
- bool "Enable an ARP check on the offered address"
- default y
- help
- Enabling this option allows check if the offered IP address is not already
- in use by another host on the network.
- endmenu
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