struct llc_sock *llc = llc_sk(sk);
int llc_conn_ac_send_ack_rsp_f_set_1(struct sock *sk, struct sk_buff *skb){	int rc = -ENOBUFS;	struct sk_buff *nskb = llc_alloc_frame();	if (nskb) {		struct llc_sock *llc = llc_sk(sk);		struct llc_sap *sap = llc->sap;		u8 f_bit = 1;		nskb->dev = llc->dev;		llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap,				    llc->daddr.lsap, LLC_PDU_RSP);		llc_pdu_init_as_rr_rsp(nskb, f_bit, llc->vR);		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);		if (rc)			goto free;		llc_conn_send_pdu(sk, nskb);	}out:	return rc;free:	kfree_skb(nskb);	goto out;}