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If this feature is enabled, then all traffic from layer2(WIFI Driver)
to layer3(LWIP stack) will make a copy, the layer2 buffer will be
- freed and the copy will be sent to layer3. Please make sure you fully
- understand this feature before you enable this feature.
-
+ freed and the copy will be sent to layer3. 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"