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Use SO_REUSEADDR instead of SO_REUSEPORT on Linux

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This commit is contained in:
Neil Alexander 2022-10-22 14:56:29 +01:00
parent c55611a478
commit 0a1a155e66
1 changed files with 8 additions and 4 deletions
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12
src/multicast/multicast_unix.go
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@ -15,15 +15,19 @@ func (m *Multicast) _multicastStarted() {
func (m *Multicast) multicastReuse(network string, address string, c syscall.RawConn) error {
var control error
var reuseport error
var reuseaddr error
control = c.Control(func(fd uintptr) {
reuseport = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
// Previously we used SO_REUSEPORT here, but that meant that machines running
// Yggdrasil nodes as different users would inevitably fail with EADDRINUSE.
// The behaviour for multicast is similar with both, so we'll use SO_REUSEADDR
// instead.
reuseaddr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
})
switch {
case reuseport != nil:
return reuseport
case reuseaddr != nil:
return reuseaddr
default:
return control
}