--- zzzz-none-000/linux-5.4.213/net/socket.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/net/socket.c	2024-08-14 09:02:15.000000000 +0000
@@ -1080,6 +1080,9 @@
 	void __user *argp = (void __user *)arg;
 	int pid, err;
 	struct net *net;
+#ifdef CONFIG_AVM_SK_TC_INDEX
+	unsigned long tc_index;
+#endif
 
 	sock = file->private_data;
 	sk = sock->sk;
@@ -1174,6 +1177,19 @@
 						   cmd == SIOCGSTAMP_NEW,
 						   false);
 			break;
+#ifdef CONFIG_AVM_SK_TC_INDEX
+		case SIOCSET_TC_INDEX:
+			err = -EFAULT;
+			if (get_user(tc_index, (unsigned long __user *)argp))
+				break;
+			sock->sk->sk_tc_index = tc_index;
+			err = 0;
+			break;
+
+		case SIOCGET_TC_INDEX:
+			err = put_user(sock->sk->sk_tc_index, (unsigned long __user *)argp);
+			break;
+#endif
 		default:
 			err = sock_do_ioctl(net, sock, cmd, arg);
 			break;