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33 lines
895 B
Markdown
33 lines
895 B
Markdown
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# `TCP_FASTOPEN` support in lws
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Lws supports enabling TCP_FASTOPEN oper-vhost for listen sockets.
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## Enabling per vhost serving
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Set the `info.fo_listen_queue` to nonzero at vhost creation. Different
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platforms interpret this number differently, zero always disables it
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but on Linux, the number is interpreted as a SYN queue length.
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On FreeBSD, OSX and Windows, the number is basically a bool, with the
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extra restriction OSX and Windows only allows 0 or 1.
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## Enabling Linux for serving with TCP_FASTOPEN
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To configure the kernel for listening socket TCP_FASTOPEN, you need
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```
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# sysctl -w net.ipv4.tcp_fastopen=3
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```
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## Enabling BSD for serving with TCP_FASTOPEN
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At least on FreeBSD, you need to set the net.inet.tcp.fastopen.enabled
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sysctl to 1
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## Enabling Windows for serving with TCP_FASTOPEN
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```
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> netsh int tcp set global fastopenfallback=disabled
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> netsh int tcp show global
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```
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