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sockopt_linux.go
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sockopt_linux.go
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// Copyright (C) 2022 mieru authors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//go:build linux
package util
import (
"syscall"
"golang.org/x/sys/unix"
)
// ReuseAddrPort sets SO_REUSEADDR and SO_REUSEPORT options to a given connection.
func ReuseAddrPort(network, address string, conn syscall.RawConn) error {
var err error
// See syscall.RawConn.Control
conn.Control(func(fd uintptr) {
// Set SO_REUSEADDR
err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
if err != nil {
return
}
// Set SO_REUSEPORT
err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
if err != nil {
return
}
})
return err
}