SO_REUSEPORT for am64 Golang

gistfile1.txt

diff --git a/udp_linux.go b/udp_linux.go
index 033df42..e1f9be8 100644
--- a/udp_linux.go
+++ b/udp_linux.go
@@ -44,18 +44,25 @@ func setUDPSocketOptions4(conn *net.UDPConn) error {
        if err != nil {
                return err
        }
+       defer file.Close()
+
+       if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IP, syscall.SO_REUSEADDR, 1); err != nil {
+               return err
+       }
+
+       if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IP, 0x0200, 1); err != nil { // SO_REUSEPORT
+               return err
+       }
+
        if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IP, syscall.IP_PKTINFO, 1); err != nil {
-               file.Close()
                return err
        }
        // Calling File() above results in the connection becoming blocking, we must fix that.
        // See https://github.com/miekg/dns/issues/279
        err = syscall.SetNonblock(int(file.Fd()), true)
        if err != nil {
-               file.Close()
                return err
        }
-       file.Close()
        return nil
 }
 
@@ -65,16 +72,24 @@ func setUDPSocketOptions6(conn *net.UDPConn) error {
        if err != nil {
                return err
        }
+       defer file.Close()
+
+       if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IPV6, syscall.SO_REUSEADDR, 1); err != nil {
+               return err
+       }
+
+       if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IPV6, 0x0200, 1); err != nil { // SO_REUSEPORT
+               return err
+       }
+
        if err := syscall.SetsockoptInt(int(file.Fd()), syscall.IPPROTO_IPV6, syscall.IPV6_RECVPKTINFO, 1); err != nil {
-               file.Close()
                return err
        }
+
        err = syscall.SetNonblock(int(file.Fd()), true)
        if err != nil {
-               file.Close()
                return err
        }
-       file.Close()
        return nil
 }