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https://github.com/DNSCrypt/dnscrypt-proxy.git
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29 lines
854 B
Go
29 lines
854 B
Go
// Copyright 2023-now by lifenjoiner. All rights reserved.
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// Use of this source code is governed by a MIT license
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// that can be found in the LICENSE file.
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//go:build (linux && 386) || (linux && amd64) || (linux && arm)
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// +build linux,386 linux,amd64 linux,arm
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package dhcpdns
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import (
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"context"
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"net"
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"syscall"
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)
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const SO_REUSEPORT = 0xf
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func reuseListenPacket(network, address string) (net.PacketConn, error) {
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lc := net.ListenConfig{
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Control: func(network, address string, c syscall.RawConn) error {
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return c.Control(func(fd uintptr) {
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_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
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// SO_REUSEPORT Requires same UID for security reason.
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_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, SO_REUSEPORT, 1)
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})
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},
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}
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return lc.ListenPacket(context.Background(), network, address)
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}
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