Fix Android UDP GRO check

amnezia-vpn · Feb 12, 2024 · 032e33f · 032e33f
1 parent 59101fd
commit 032e33f
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Showing 2 changed files with 4 additions and 10 deletions.
diff --git a/conn/controlfns_linux.go b/conn/controlfns_linux.go
@@ -57,13 +57,5 @@ func init() {
 			}
 			return err
 		},
-
-		// Attempt to enable UDP_GRO
-		func(network, address string, c syscall.RawConn) error {
-			c.Control(func(fd uintptr) {
-				_ = unix.SetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO, 1)
-			})
-			return nil
-		},
 	)
 }
diff --git a/conn/features_linux.go b/conn/features_linux.go
@@ -19,8 +19,10 @@ func supportsUDPOffload(conn *net.UDPConn) (txOffload, rxOffload bool) {
 	err = rc.Control(func(fd uintptr) {
 		_, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
 		txOffload = errSyscall == nil
-		opt, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO)
-		rxOffload = errSyscall == nil && opt == 1
+		// getsockopt(IPPROTO_UDP, UDP_GRO) is not supported in android
+		// use setsockopt workaround
+		errSyscall = unix.SetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO, 1)
+		rxOffload = errSyscall == nil
 	})
 	if err != nil {
 		return false, false