From e965df174205e68fc3dd9c403310de192d7a58cc Mon Sep 17 00:00:00 2001
From: Prem Chaitanya Prathi <chaitanyaprem@gmail.com>
Date: Fri, 4 Aug 2023 15:52:34 +0530
Subject: [PATCH] feat: Add support for SO_REUSEPORT_LB option as per freeBSD

---
 control_unix.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/control_unix.go b/control_unix.go
index 4197d1f..f3cd60a 100644
--- a/control_unix.go
+++ b/control_unix.go
@@ -8,6 +8,9 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+// This value has been taken from https://reviews.freebsd.org/D11003 since this is not yet provided in golang.
+const FREEBSD_SO_REUSEPORT_LB = 0x00010000
+
 func Control(network, address string, c syscall.RawConn) (err error) {
 	controlErr := c.Control(func(fd uintptr) {
 		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
@@ -15,6 +18,10 @@ func Control(network, address string, c syscall.RawConn) (err error) {
 			return
 		}
 		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
+		if err != nil {
+			return
+		}
+		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, FREEBSD_SO_REUSEPORT_LB, 1)
 	})
 	if controlErr != nil {
 		err = controlErr