Disable ETHARP_TRUST_IP_MAC by default because: 1. The LAN peer may not be trustful 2. The LAN peer may has problem to update its ARP entry
489 lines
17 KiB
Text
489 lines
17 KiB
Text
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_IRAM_OPTIMIZATION
|
|
bool "Enable LWIP IRAM optimization"
|
|
default n
|
|
help
|
|
If this feature is enabled, some functions relating to RX/TX in LWIP will be
|
|
put into IRAM, it can improve UDP/TCP throughput by >10% for single core mode,
|
|
it doesn't help too much for dual core mode. On the other hand, it needs about
|
|
10KB IRAM for these optimizations.
|
|
|
|
If this feature is disabled, all lwip functions will be put into FLASH.
|
|
|
|
config LWIP_MAX_SOCKETS
|
|
int "Max number of open sockets"
|
|
range 1 16
|
|
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 USE_ONLY_LWIP_SELECT
|
|
bool "Support LWIP socket select() only"
|
|
default n
|
|
help
|
|
The virtual filesystem layer of select() redirects sockets to
|
|
lwip_select() and non-socket file descriptors to their respective driver
|
|
implementations. If this option is enabled then all calls of select()
|
|
will be redirected to lwip_select(), therefore, select can be used
|
|
for sockets only.
|
|
|
|
config LWIP_SO_REUSE
|
|
bool "Enable SO_REUSEADDR option"
|
|
default y
|
|
help
|
|
Enabling this option allows binding to a port which remains in
|
|
TIME_WAIT.
|
|
|
|
config LWIP_SO_REUSE_RXTOALL
|
|
bool "SO_REUSEADDR copies broadcast/multicast to all matches"
|
|
depends on LWIP_SO_REUSE
|
|
default y
|
|
help
|
|
Enabling this option means that any incoming broadcast or multicast
|
|
packet will be copied to all of the local sockets that it matches
|
|
(may be more than one if SO_REUSEADDR is set on the socket.)
|
|
|
|
This increases memory overhead as the packets need to be copied,
|
|
however they are only copied per matching socket. You can safely
|
|
disable it if you don't plan to receive broadcast or multicast
|
|
traffic on more than one socket at a time.
|
|
|
|
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 LWIP_STATS
|
|
bool "Enable LWIP statistics"
|
|
default n
|
|
help
|
|
Enabling this option allows LWIP statistics
|
|
|
|
config LWIP_ETHARP_TRUST_IP_MAC
|
|
bool "Enable LWIP ARP trust"
|
|
default n
|
|
help
|
|
Enabling this option allows ARP table to be updated.
|
|
|
|
If this option is enabled, the incoming IP packets cause the ARP table to be
|
|
updated with the source MAC and IP addresses supplied in the packet.
|
|
You may want to disable this if you do not trust LAN peers to have the
|
|
correct addresses, or as a limited approach to attempt to handle
|
|
spoofing. If disabled, lwIP will need to make a new ARP request if
|
|
the peer is not already in the ARP table, adding a little latency.
|
|
The peer *is* in the ARP table if it requested our address before.
|
|
Also notice that this slows down input processing of every IP packet!
|
|
|
|
There are two known issues in real application if this feature is enabled:
|
|
- The LAN peer may have bug to update the ARP table after the ARP entry is aged out.
|
|
If the ARP entry on the LAN peer is aged out but failed to be updated, all IP packets
|
|
sent from LWIP to the LAN peer will be dropped by LAN peer.
|
|
- The LAN peer may not be trustful, the LAN peer may send IP packets to LWIP with
|
|
two different MACs, but the same IP address. If this happens, the LWIP has problem
|
|
to receive IP packets from LAN peer.
|
|
|
|
So the recommendation is to disable this option.
|
|
Here the LAN peer means the other side to which the ESP station or soft-AP is connected.
|
|
|
|
config TCPIP_RECVMBOX_SIZE
|
|
int "TCPIP task receive mail box size"
|
|
default 32
|
|
range 6 64
|
|
help
|
|
Set TCPIP task receive mail box size. Generally bigger value means higher throughput
|
|
but more memory. The value should be bigger than UDP/TCP mail box size.
|
|
|
|
config LWIP_DHCP_DOES_ARP_CHECK
|
|
bool "DHCP: Perform ARP check on any offered address"
|
|
default y
|
|
help
|
|
Enabling this option performs a check (via ARP request) if the offered IP address
|
|
is not already in use by another host on the network.
|
|
|
|
menu "DHCP server"
|
|
|
|
config LWIP_DHCPS_LEASE_UNIT
|
|
int "Multiplier for lease time, in seconds"
|
|
range 1 3600
|
|
default 60
|
|
help
|
|
The DHCP server is calculating lease time multiplying the sent
|
|
and received times by this number of seconds per unit.
|
|
The default is 60, that equals one minute.
|
|
|
|
config LWIP_DHCPS_MAX_STATION_NUM
|
|
int "Maximum number of stations"
|
|
range 1 64
|
|
default 8
|
|
help
|
|
The maximum number of DHCP clients that are connected to the server.
|
|
After this number is exceeded, DHCP server removes of the oldest device
|
|
from it's address pool, without notification.
|
|
|
|
endmenu # DHCPS
|
|
|
|
menuconfig LWIP_AUTOIP
|
|
bool "Enable IPV4 Link-Local Addressing (AUTOIP)"
|
|
default n
|
|
help
|
|
Enabling this option allows the device to self-assign an address
|
|
in the 169.256/16 range if none is assigned statically or via DHCP.
|
|
|
|
See RFC 3927.
|
|
|
|
config LWIP_AUTOIP_TRIES
|
|
int "DHCP Probes before self-assigning IPv4 LL address"
|
|
range 1 100
|
|
default 2
|
|
depends on LWIP_AUTOIP
|
|
help
|
|
DHCP client will send this many probes before self-assigning a
|
|
link local address.
|
|
|
|
From LWIP help: "This can be set as low as 1 to get an AutoIP
|
|
address very quickly, but you should be prepared to handle a
|
|
changing IP address when DHCP overrides AutoIP." (In the case of
|
|
ESP-IDF, this means multiple SYSTEM_EVENT_STA_GOT_IP events.)
|
|
|
|
config LWIP_AUTOIP_MAX_CONFLICTS
|
|
int "Max IP conflicts before rate limiting"
|
|
range 1 100
|
|
default 9
|
|
depends on LWIP_AUTOIP
|
|
help
|
|
If the AUTOIP functionality detects this many IP conflicts while
|
|
self-assigning an address, it will go into a rate limited mode.
|
|
|
|
config LWIP_AUTOIP_RATE_LIMIT_INTERVAL
|
|
int "Rate limited interval (seconds)"
|
|
range 5 120
|
|
default 20
|
|
depends on LWIP_AUTOIP
|
|
help
|
|
If rate limiting self-assignment requests, wait this long between
|
|
each request.
|
|
|
|
menuconfig LWIP_NETIF_LOOPBACK
|
|
bool "Support per-interface loopback"
|
|
default y
|
|
help
|
|
Enabling this option means that if a packet is sent with a destination
|
|
address equal to the interface's own IP address, it will "loop back" and
|
|
be received by this interface.
|
|
|
|
config LWIP_LOOPBACK_MAX_PBUFS
|
|
int "Max queued loopback packets per interface"
|
|
range 0 16
|
|
default 8
|
|
depends on LWIP_NETIF_LOOPBACK
|
|
help
|
|
Configure the maximum number of packets which can be queued for
|
|
loopback on a given interface. Reducing this number may cause packets
|
|
to be dropped, but will avoid filling memory with queued packet data.
|
|
|
|
menu "TCP"
|
|
|
|
config LWIP_MAX_ACTIVE_TCP
|
|
int "Maximum active TCP Connections"
|
|
range 1 1024
|
|
default 16
|
|
help
|
|
The maximum number of simultaneously active TCP
|
|
connections. The practical maximum limit is
|
|
determined by available heap memory at runtime.
|
|
|
|
Changing this value by itself does not substantially
|
|
change the memory usage of LWIP, except for preventing
|
|
new TCP connections after the limit is reached.
|
|
|
|
config LWIP_MAX_LISTENING_TCP
|
|
int "Maximum listening TCP Connections"
|
|
range 1 1024
|
|
default 16
|
|
help
|
|
The maximum number of simultaneously listening TCP
|
|
connections. The practical maximum limit is
|
|
determined by available heap memory at runtime.
|
|
|
|
Changing this value by itself does not substantially
|
|
change the memory usage of LWIP, except for preventing
|
|
new listening TCP connections after the limit is reached.
|
|
|
|
|
|
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 TCP_MSS
|
|
int "Maximum Segment Size (MSS)"
|
|
default 1436
|
|
range 1220 1436
|
|
help
|
|
Set maximum segment size for TCP transmission.
|
|
|
|
Can be set lower to save RAM, the default value 1436 will give best throughput.
|
|
|
|
config TCP_MSL
|
|
int "Maximum segment lifetime (MSL)"
|
|
default 60000
|
|
help
|
|
Set maximum segment lifetime in in milliseconds.
|
|
|
|
config TCP_SND_BUF_DEFAULT
|
|
int "Default send buffer size"
|
|
default 5744 # 4 * default MSS
|
|
range 2440 65535
|
|
help
|
|
Set default send buffer size for new TCP sockets.
|
|
|
|
Per-socket send buffer size can be changed at runtime
|
|
with lwip_setsockopt(s, TCP_SNDBUF, ...).
|
|
|
|
This value must be at least 2x the MSS size, and the default
|
|
is 4x the default MSS size.
|
|
|
|
Setting a smaller default SNDBUF size can save some RAM, but
|
|
will decrease performance.
|
|
|
|
config TCP_WND_DEFAULT
|
|
int "Default receive window size"
|
|
default 5744 # 4 * default MSS
|
|
range 2440 65535
|
|
help
|
|
Set default TCP receive window size for new TCP sockets.
|
|
|
|
Per-socket receive window size can be changed at runtime
|
|
with lwip_setsockopt(s, TCP_WINDOW, ...).
|
|
|
|
Setting a smaller default receive window size can save some RAM,
|
|
but will significantly decrease performance.
|
|
|
|
config TCP_RECVMBOX_SIZE
|
|
int "Default TCP receive mail box size"
|
|
default 6
|
|
range 6 64
|
|
help
|
|
Set TCP receive mail box size. Generally bigger value means higher throughput
|
|
but more memory. The recommended value is: TCP_WND_DEFAULT/TCP_MSS + 2, e.g. if
|
|
TCP_WND_DEFAULT=14360, TCP_MSS=1436, then the recommended receive mail box size is
|
|
(14360/1436 + 2) = 12.
|
|
|
|
TCP receive mail box is a per socket mail box, when the application receives packets
|
|
from TCP socket, LWIP core firstly posts the packets to TCP receive mail box and the
|
|
application then fetches the packets from mail box. It means LWIP can caches maximum
|
|
TCP_RECCVMBOX_SIZE packets for each TCP socket, so the maximum possible cached TCP packets
|
|
for all TCP sockets is TCP_RECCVMBOX_SIZE multiples the maximum TCP socket number. In other
|
|
words, the bigger TCP_RECVMBOX_SIZE means more memory.
|
|
On the other hand, if the receiv mail box is too small, the mail box may be full. If the
|
|
mail box is full, the LWIP drops the packets. So generally we need to make sure the TCP
|
|
receive mail box is big enough to avoid packet drop between LWIP core and application.
|
|
|
|
config TCP_QUEUE_OOSEQ
|
|
bool "Queue incoming out-of-order segments"
|
|
default y
|
|
help
|
|
Queue incoming out-of-order segments for later use.
|
|
|
|
Disable this option to save some RAM during TCP sessions, at the expense
|
|
of increased retransmissions if segments arrive out of order.
|
|
|
|
config ESP_TCP_KEEP_CONNECTION_WHEN_IP_CHANGES
|
|
bool "Keep TCP connections when IP changed"
|
|
default n
|
|
help
|
|
This option is enabled when the following scenario happen:
|
|
network dropped and reconnected, IP changes is like: 192.168.0.2->0.0.0.0->192.168.0.2
|
|
|
|
Disable this option to keep consistent with the original LWIP code behavior.
|
|
|
|
|
|
choice TCP_OVERSIZE
|
|
prompt "Pre-allocate transmit PBUF size"
|
|
default TCP_OVERSIZE_MSS
|
|
help
|
|
Allows enabling "oversize" allocation of TCP transmission pbufs ahead of time,
|
|
which can reduce the length of pbuf chains used for transmission.
|
|
|
|
This will not make a difference to sockets where Nagle's algorithm
|
|
is disabled.
|
|
|
|
Default value of MSS is fine for most applications, 25% MSS may save
|
|
some RAM when only transmitting small amounts of data. Disabled will
|
|
have worst performance and fragmentation characteristics, but uses
|
|
least RAM overall.
|
|
|
|
config TCP_OVERSIZE_MSS
|
|
bool "MSS"
|
|
config TCP_OVERSIZE_QUARTER_MSS
|
|
bool "25% MSS"
|
|
config TCP_OVERSIZE_DISABLE
|
|
bool "Disabled"
|
|
|
|
endchoice
|
|
|
|
endmenu # TCP
|
|
|
|
menu "UDP"
|
|
|
|
config LWIP_MAX_UDP_PCBS
|
|
int "Maximum active UDP control blocks"
|
|
range 1 1024
|
|
default 16
|
|
help
|
|
The maximum number of active UDP "connections" (ie
|
|
UDP sockets sending/receiving data).
|
|
The practical maximum limit is determined by available
|
|
heap memory at runtime.
|
|
|
|
config UDP_RECVMBOX_SIZE
|
|
int "Default UDP receive mail box size"
|
|
default 6
|
|
range 6 64
|
|
help
|
|
Set UDP receive mail box size. The recommended value is 6.
|
|
|
|
UDP receive mail box is a per socket mail box, when the application receives packets
|
|
from UDP socket, LWIP core firstly posts the packets to UDP receive mail box and the
|
|
application then fetches the packets from mail box. It means LWIP can caches maximum
|
|
UDP_RECCVMBOX_SIZE packets for each UDP socket, so the maximum possible cached UDP packets
|
|
for all UDP sockets is UDP_RECCVMBOX_SIZE multiples the maximum UDP socket number. In other
|
|
words, the bigger UDP_RECVMBOX_SIZE means more memory.
|
|
On the other hand, if the receiv mail box is too small, the mail box may be full. If the
|
|
mail box is full, the LWIP drops the packets. So generally we need to make sure the UDP
|
|
receive mail box is big enough to avoid packet drop between LWIP core and application.
|
|
|
|
endmenu # UDP
|
|
|
|
config TCPIP_TASK_STACK_SIZE
|
|
int "TCP/IP Task Stack Size"
|
|
default 2048
|
|
# for high log levels, tcpip_adapter API calls can end up
|
|
# a few calls deep and logging there can trigger a stack overflow
|
|
range 2048 65536 if LOG_DEFAULT_LEVEL < 4
|
|
range 2560 65536 if LOG_DEFAULT_LEVEL >= 4
|
|
help
|
|
Configure TCP/IP task stack size, used by LWIP to process multi-threaded TCP/IP operations.
|
|
Setting this stack too small will result in stack overflow crashes.
|
|
|
|
menuconfig PPP_SUPPORT
|
|
bool "Enable PPP support (new/experimental)"
|
|
default n
|
|
help
|
|
Enable PPP stack. Now only PPP over serial is possible.
|
|
|
|
PPP over serial support is experimental and unsupported.
|
|
|
|
config PPP_PAP_SUPPORT
|
|
bool "Enable PAP support"
|
|
depends on PPP_SUPPORT
|
|
default n
|
|
help
|
|
Enable Password Authentication Protocol (PAP) support
|
|
|
|
config PPP_CHAP_SUPPORT
|
|
bool "Enable CHAP support"
|
|
depends on PPP_SUPPORT
|
|
default n
|
|
help
|
|
Enable Challenge Handshake Authentication Protocol (CHAP) support
|
|
|
|
config PPP_MSCHAP_SUPPORT
|
|
bool "Enable MSCHAP support"
|
|
depends on PPP_SUPPORT
|
|
default n
|
|
help
|
|
Enable Microsoft version of the Challenge-Handshake Authentication Protocol (MSCHAP) support
|
|
|
|
config PPP_MPPE_SUPPORT
|
|
bool "Enable MPPE support"
|
|
depends on PPP_SUPPORT
|
|
default n
|
|
help
|
|
Enable Microsoft Point-to-Point Encryption (MPPE) support
|
|
|
|
config PPP_DEBUG_ON
|
|
bool "Enable PPP debug log output"
|
|
depends on PPP_SUPPORT
|
|
default n
|
|
help
|
|
Enable PPP debug log output
|
|
|
|
menu "ICMP"
|
|
|
|
config LWIP_MULTICAST_PING
|
|
bool "Respond to multicast pings"
|
|
default n
|
|
|
|
config LWIP_BROADCAST_PING
|
|
bool "Respond to broadcast pings"
|
|
default n
|
|
|
|
endmenu # ICMP
|
|
|
|
menu "LWIP RAW API"
|
|
|
|
config LWIP_MAX_RAW_PCBS
|
|
int "Maximum LWIP RAW PCBs"
|
|
range 1 1024
|
|
default 16
|
|
help
|
|
The maximum number of simultaneously active LWIP
|
|
RAW protocol control blocks. The practical maximum
|
|
limit is determined by available heap memory at runtime.
|
|
|
|
endmenu # LWIP RAW API
|
|
|
|
endmenu
|