From 942fbb37ec46f1907e57a04c44ca790bd47ed52c Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jd+github@upthedownstair.com>
Date: Tue, 23 May 2023 17:56:00 +0100
Subject: [PATCH] core: Use SO_REUSEPORT_LB on FreeBSD (#5554)

to balance load between threads.
---
 listen_unix.go                | 2 +-
 listen_unix_setopt.go         | 7 +++++++
 listen_unix_setopt_freebsd.go | 7 +++++++
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 listen_unix_setopt.go
 create mode 100644 listen_unix_setopt_freebsd.go

diff --git a/listen_unix.go b/listen_unix.go
index 50d9a66d..7011a1e6 100644
--- a/listen_unix.go
+++ b/listen_unix.go
@@ -119,7 +119,7 @@ func reusePort(network, address string, conn syscall.RawConn) error {
 		return nil
 	}
 	return conn.Control(func(descriptor uintptr) {
-		if err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1); err != nil {
+		if err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unixSOREUSEPORT, 1); err != nil {
 			Log().Error("setting SO_REUSEPORT",
 				zap.String("network", network),
 				zap.String("address", address),
diff --git a/listen_unix_setopt.go b/listen_unix_setopt.go
new file mode 100644
index 00000000..c9675f92
--- /dev/null
+++ b/listen_unix_setopt.go
@@ -0,0 +1,7 @@
+//go:build unix && !freebsd
+
+package caddy
+
+import "golang.org/x/sys/unix"
+
+const unixSOREUSEPORT = unix.SO_REUSEPORT
diff --git a/listen_unix_setopt_freebsd.go b/listen_unix_setopt_freebsd.go
new file mode 100644
index 00000000..06520540
--- /dev/null
+++ b/listen_unix_setopt_freebsd.go
@@ -0,0 +1,7 @@
+//go:build freebsd
+
+package caddy
+
+import "golang.org/x/sys/unix"
+
+const unixSOREUSEPORT = unix.SO_REUSEPORT_LB