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Sebastiaan van Stijn
b17df8fea3
fixes support for BSD variants Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
40 lines
935 B
Go
40 lines
935 B
Go
//go:build darwin || dragonfly || freebsd || netbsd || openbsd
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package sockets
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import (
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"runtime"
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"syscall"
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)
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// maxListenerBacklog is similar to the equivalent in stdlib;
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// https://github.com/golang/go/blob/go1.26.3/src/net/sock_bsd.go#L14-L39
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func maxListenerBacklog() int {
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var (
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n uint32
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err error
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)
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switch runtime.GOOS {
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case "darwin", "ios":
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n, err = syscall.SysctlUint32("kern.ipc.somaxconn")
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case "freebsd":
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n, err = syscall.SysctlUint32("kern.ipc.soacceptqueue")
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case "netbsd":
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// NOTE: NetBSD has no somaxconn-like kernel state so far
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case "openbsd":
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n, err = syscall.SysctlUint32("kern.somaxconn")
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default:
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return syscall.SOMAXCONN
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}
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if n == 0 || err != nil {
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return syscall.SOMAXCONN
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}
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// FreeBSD stores the backlog in a uint16, as does Linux.
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// Assume the other BSDs do too. Truncate number to avoid wrapping.
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// See issue 5030.
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if n > 1<<16-1 {
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n = 1<<16 - 1
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}
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return int(n)
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}
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