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Merge branch 'feature/seperate_ipv6_function_from_ipv4' into 'master'

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Add LWIP_IPV6 macro to strip IPv6 function

See merge request espressif/esp-idf!11977
This commit is contained in:
David Čermák
2021-02-24 11:20:53 +00:00
parent a38b2c2773 f430e54c5a
commit 5f0aa46cbf
31 changed files with 243 additions and 60 deletions
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docs/en/api-guides/lwip.rst
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@@ -373,6 +373,7 @@ Most lwIP RAM usage is on-demand, as RAM is allocated from the heap as needed. T
- Reducing :ref:`CONFIG_LWIP_MAX_SOCKETS` reduces the maximum number of sockets in the system. This will also cause TCP sockets in the ``WAIT_CLOSE`` state to be closed and recycled more rapidly (if needed to open a new socket), further reducing peak RAM usage.
- Reducing :ref:`CONFIG_LWIP_TCPIP_RECVMBOX_SIZE`, :ref:`CONFIG_LWIP_TCP_RECVMBOX_SIZE` and :ref:`CONFIG_LWIP_UDP_RECVMBOX_SIZE` reduce memory usage at the expense of throughput, depending on usage.
- Disable :ref:`CONFIG_LWIP_IPV6` can save about 39 KB for firmware size and 2KB RAM when system power up and 7KB RAM when TCPIP stack running. If there is no requirement for supporting IPV6 then it can be disabled to save flash and RAM footprint.
If using Wi-Fi, please also refer to :ref:`wifi-buffer-usage`.