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39 lines
1.2 KiB
Groff
39 lines
1.2 KiB
Groff
.TH socket_quickack 3
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.SH NAME
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socket_quickack \- turn TCP Quick ACK mode on or off
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.SH SYNTAX
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.B #include <socket.h>
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int \fBsocket_quickack\fP(int \fIs\fR,int \fIvalue\fR);
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.SH DESCRIPTION
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socket_quickack switches TCP Quick ACK mode on (value=1) or off
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(value=0). If the platform does not support this functionality, returns
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-1 and sets errno to ENOPROTOOPT (or ENOSYS if the platform does not
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define ENOPROTOOPT).
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TCP Quick ACK mode is on by default because the operating system has to
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assume it's an interactive connection. In that case, an ACK will be
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sent quickly after data came in. If your code handles non-interactive
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server connections, it may make sense to switch Quick ACK mode off,
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telling the kernel to delay sending ACKs because the server is going to
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respond to incoming requests anyway, so the ACK can be piggy-backed onto
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that response, saving useless network traffic.
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Normally socket_quickack returns 0. If anything goes wrong, socket_quickack
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returns -1, setting errno appropriately.
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.SH EXAMPLE
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#include <socket.h>
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int \fIs\fR;
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char \fIip\fR[4];
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uint16 \fIp\fR;
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\fIs\fR = socket_tcp4b();
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socket_quickack(s);
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socket_bind4_reuse(s,ip,p);
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socket_listen(16);
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.SH "SEE ALSO"
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socket_fastopen(3)
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