1 files changed, 35 insertions, 0 deletions
diff --git a/conn/features_linux.go b/conn/features_linux.go
new file mode 100644
index 0000000..e1fb57f
--- /dev/null
+++ b/conn/features_linux.go
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ */
+
+package conn
+
+import (
+	"net"
+
+	"golang.org/x/sys/unix"
+)
+
+func supportsUDPOffload(conn *net.UDPConn) (txOffload, rxOffload bool) {
+	rc, err := conn.SyscallConn()
+	if err != nil {
+		return
+	}
+	err = rc.Control(func(fd uintptr) {
+		_, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
+		if errSyscall != nil {
+			return
+		}
+		txOffload = true
+		opt, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO)
+		if errSyscall != nil {
+			return
+		}
+		rxOffload = opt == 1
+	})
+	if err != nil {
+		return false, false
+	}
+	return txOffload, rxOffload
+}