mirror of
https://github.com/yggdrasil-network/yggdrasil-go
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35 lines
832 B
Go
35 lines
832 B
Go
//go:build linux || netbsd || freebsd || openbsd || dragonflybsd
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// +build linux netbsd freebsd openbsd dragonflybsd
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package multicast
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import (
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"syscall"
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"golang.org/x/sys/unix"
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)
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func (m *Multicast) _multicastStarted() {
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}
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func (m *Multicast) multicastReuse(network string, address string, c syscall.RawConn) error {
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var control error
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var reuseaddr error
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control = c.Control(func(fd uintptr) {
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// Previously we used SO_REUSEPORT here, but that meant that machines running
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// Yggdrasil nodes as different users would inevitably fail with EADDRINUSE.
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// The behaviour for multicast is similar with both, so we'll use SO_REUSEADDR
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// instead.
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reuseaddr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
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})
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switch {
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case reuseaddr != nil:
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return reuseaddr
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default:
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return control
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}
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}
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