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