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6a44990b09
This commit uses SO_REUSEPORT (when supported) to bind multiple sockets per address family. Increasing the number of sockets can increase aggregate throughput when serving many peer relay client flows. Benchmarks show 3x improvement in max aggregate bitrate in some environments. Updates tailscale/corp#34745 Signed-off-by: Jordan Whited <jordan@tailscale.com>
36 lines
673 B
Go
36 lines
673 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build linux
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package udprelay
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import (
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"net"
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"syscall"
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"golang.org/x/sys/unix"
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)
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func listenControl(_ string, _ string, c syscall.RawConn) error {
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c.Control(func(fd uintptr) {
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unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
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})
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return nil
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}
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func isReusableSocket(uc *net.UDPConn) bool {
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rc, err := uc.SyscallConn()
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if err != nil {
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return false
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}
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var reusable bool
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rc.Control(func(fd uintptr) {
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val, err := unix.GetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT)
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if err == nil && val == 1 {
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reusable = true
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}
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})
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return reusable
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}
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