예제 #1
0
int llc_conn_ac_send_sabme_cmd_p_set_x(struct sock *sk, struct sk_buff *skb)
{
	int rc = -ENOBUFS;
	struct llc_sock *llc = llc_sk(sk);
	struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0);

	if (nskb) {
		struct llc_sap *sap = llc->sap;
		u8 *dmac = llc->daddr.mac;

		if (llc->dev->flags & IFF_LOOPBACK)
			dmac = llc->dev->dev_addr;
		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_CMD);
		llc_pdu_init_as_sabme_cmd(nskb, 1);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, dmac);
		if (unlikely(rc))
			goto free;
		llc_conn_send_pdu(sk, nskb);
		llc_conn_set_p_flag(sk, 1);
	}
out:
	return rc;
free:
	kfree_skb(nskb);
	goto out;
}
int llc_conn_ac_send_disc_cmd_p_set_x(struct sock *sk, struct sk_buff *skb)
{
	int rc = -ENOBUFS;
	struct sk_buff *nskb = llc_alloc_frame();

	if (nskb) {
		struct llc_opt *llc = llc_sk(sk);
		struct llc_sap *sap = llc->sap;

		nskb->dev = llc->dev;
		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_CMD);
		llc_pdu_init_as_disc_cmd(nskb, 1);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);
		if (rc)
			goto free;
		llc_conn_send_pdu(sk, nskb);
		llc_conn_ac_set_p_flag_1(sk, skb);
	}
out:
	return rc;
free:
	kfree_skb(nskb);
	goto out;
}
예제 #3
0
int llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(struct sock *sk,
						struct sk_buff *skb)
{
	u8 nr;
	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	int rc = -ENOBUFS;
	struct llc_sock *llc = llc_sk(sk);
	struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0);

	if (nskb) {
		struct llc_sap *sap = llc->sap;

		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_RSP);
		llc_pdu_init_as_rr_rsp(nskb, 0, llc->vR);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);
		if (likely(!rc))
			llc_conn_send_pdu(sk, nskb);
		else
			kfree_skb(skb);
	}
	if (rc) {
		nr = LLC_I_GET_NR(pdu);
		rc = 0;
		llc_conn_resend_i_pdu_as_cmd(sk, nr, 0);
	}
	return rc;
}
예제 #4
0
int llc_sap_action_send_test_r(struct llc_sap *sap, struct sk_buff *skb)
{
	u8 mac_da[ETH_ALEN], mac_sa[ETH_ALEN], dsap;
	struct sk_buff *nskb;
	int rc = 1;
	u32 data_size;

	llc_pdu_decode_sa(skb, mac_da);
	llc_pdu_decode_da(skb, mac_sa);
	llc_pdu_decode_ssap(skb, &dsap);

	
	data_size = ntohs(eth_hdr(skb)->h_proto) - 3;
	nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, data_size);
	if (!nskb)
		goto out;
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, dsap,
			    LLC_PDU_RSP);
	llc_pdu_init_as_test_rsp(nskb, skb);
	rc = llc_mac_hdr_init(nskb, mac_sa, mac_da);
	if (likely(!rc))
		rc = dev_queue_xmit(nskb);
out:
	return rc;
}
예제 #5
0
int llc_conn_ac_resend_frmr_rsp_f_set_p(struct sock *sk, struct sk_buff *skb)
{
	u8 f_bit;
	int rc = -ENOBUFS;
	struct sk_buff *nskb;
	struct llc_sock *llc = llc_sk(sk);

	llc_pdu_decode_pf_bit(skb, &f_bit);
	nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U,
			       sizeof(struct llc_frmr_info));
	if (nskb) {
		struct llc_sap *sap = llc->sap;
		struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_RSP);
		llc_pdu_init_as_frmr_rsp(nskb, pdu, f_bit, llc->vS,
					 llc->vR, INCORRECT);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);
		if (unlikely(rc))
			goto free;
		llc_conn_send_pdu(sk, nskb);
	}
out:
	return rc;
free:
	kfree_skb(nskb);
	goto out;
}
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_opt *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;
}
int llc_conn_ac_resend_frmr_rsp_f_set_0(struct sock *sk, struct sk_buff *skb)
{
	int rc = -ENOBUFS;
	struct sk_buff *nskb = llc_alloc_frame();

	if (nskb) {
		u8 f_bit = 0;
		struct llc_opt *llc = llc_sk(sk);
		struct llc_sap *sap = llc->sap;
		struct llc_pdu_sn *pdu = (struct llc_pdu_sn *)&llc->rx_pdu_hdr;

		nskb->dev = llc->dev;
		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_RSP);
		llc_pdu_init_as_frmr_rsp(nskb, pdu, f_bit, llc->vS,
					 llc->vR, INCORRECT);
		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;
}
int llc_conn_ac_send_frmr_rsp_f_set_x(struct sock *sk, struct sk_buff *skb)
{
	u8 f_bit;
	int rc = -ENOBUFS;
	struct sk_buff *nskb;
	struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	struct llc_opt *llc = llc_sk(sk);

	llc->rx_pdu_hdr = *((u32 *)pdu);
	if (LLC_PDU_IS_CMD(pdu))
		llc_pdu_decode_pf_bit(skb, &f_bit);
	else
		f_bit = 0;
	nskb = llc_alloc_frame();
	if (nskb) {
		struct llc_sap *sap = llc->sap;

		nskb->dev = llc->dev;
		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_RSP);
		llc_pdu_init_as_frmr_rsp(nskb, pdu, f_bit, llc->vS,
					 llc->vR, INCORRECT);
		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;
}
static int llc_station_ac_send_test_r(struct sk_buff *skb)
{
	u8 mac_da[ETH_ALEN], dsap;
	int rc = 1;
	u32 data_size;
	struct sk_buff *nskb;

	/* The test request command is type U (llc_len = 3) */
	data_size = ntohs(eth_hdr(skb)->h_proto) - 3;
	nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, data_size);

	if (!nskb)
		goto out;
	rc = 0;
	llc_pdu_decode_sa(skb, mac_da);
	llc_pdu_decode_ssap(skb, &dsap);
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
	llc_pdu_init_as_test_rsp(nskb, skb);
	rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
	if (unlikely(rc))
		goto free;
	llc_station_send_pdu(nskb);
out:
	return rc;
free:
	kfree_skb(skb);
	goto out;
}
예제 #10
0
int llc_conn_ac_send_ua_rsp_f_set_p(struct sock *sk, struct sk_buff *skb)
{
	u8 f_bit;
	int rc = -ENOBUFS;
	struct llc_sock *llc = llc_sk(sk);
	struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0);

	llc_pdu_decode_pf_bit(skb, &f_bit);
	if (nskb) {
		struct llc_sap *sap = llc->sap;

		nskb->dev = llc->dev;
		llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap,
				    llc->daddr.lsap, LLC_PDU_RSP);
		llc_pdu_init_as_ua_rsp(nskb, f_bit);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);
		if (unlikely(rc))
			goto free;
		llc_conn_send_pdu(sk, nskb);
	}
out:
	return rc;
free:
	kfree_skb(nskb);
	goto out;
}
예제 #11
0
/**
 *	llc_build_and_send_ui_pkt - unitdata request interface for upper layers
 *	@sap: sap to use
 *	@skb: packet to send
 *	@dmac: destination mac address
 *	@dsap: destination sap
 *
 *	Upper layers calls this function when upper layer wants to send data
 *	using connection-less mode communication (UI pdu).
 *
 *	Accept data frame from network layer to be sent using connection-
 *	less mode communication; timeout/retries handled by network layer;
 *	package primitive as an event and send to SAP event handler
 */
int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb,
			      unsigned char *dmac, unsigned char dsap)
{
	int rc;
	llc_pdu_header_init(skb, LLC_PDU_TYPE_U, sap->laddr.lsap,
			    dsap, LLC_PDU_CMD);
	llc_pdu_init_as_ui_cmd(skb);
	rc = llc_mac_hdr_init(skb, skb->dev->dev_addr, dmac);
	if (likely(!rc))
		rc = dev_queue_xmit(skb);
	return rc;
}
예제 #12
0
int llc_sap_action_send_test_c(struct llc_sap *sap, struct sk_buff *skb)
{
	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
	int rc;

	llc_pdu_header_init(skb, LLC_PDU_TYPE_U, ev->saddr.lsap,
			    ev->daddr.lsap, LLC_PDU_CMD);
	llc_pdu_init_as_test_cmd(skb);
	rc = llc_mac_hdr_init(skb, ev->saddr.mac, ev->daddr.mac);
	if (likely(!rc))
		rc = dev_queue_xmit(skb);
	return rc;
}
예제 #13
0
int llc_conn_ac_send_i_xxx_x_set_0(struct sock *sk, struct sk_buff *skb)
{
	int rc;
	struct llc_sock *llc = llc_sk(sk);
	struct llc_sap *sap = llc->sap;

	llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap,
			    llc->daddr.lsap, LLC_PDU_CMD);
	llc_pdu_init_as_i_cmd(skb, 0, llc->vS, llc->vR);
	rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac);
	if (likely(!rc)) {
		llc_conn_send_pdu(sk, skb);
		llc_conn_ac_inc_vs_by_1(sk, skb);
	}
	return 0;
}
/**
 *	llc_conn_ac_send_i_rsp_f_set_ackpf - acknowledge received PDUs
 *	@sk: current connection structure
 *	@skb: current event
 *
 *	Sends an I response PDU with f-bit set to ack_pf flag as acknowledge to
 *	all received PDUs which have not been acknowledged, yet. ack_pf flag is
 *	set to one if one PDU with p-bit set to one is received.  Returns 0 for
 *	success, 1 otherwise.
 */
int llc_conn_ac_send_i_rsp_f_set_ackpf(struct sock *sk, struct sk_buff *skb)
{
	int rc;
	struct llc_opt *llc = llc_sk(sk);
	struct llc_sap *sap = llc->sap;

	llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap,
			    llc->daddr.lsap, LLC_PDU_RSP);
	llc_pdu_init_as_i_cmd(skb, llc->ack_pf, llc->vS, llc->vR);
	rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac);
	if (!rc) {
		llc_conn_send_pdu(sk, skb);
		llc_conn_ac_inc_vs_by_1(sk, skb);
	}
	return rc;
}
예제 #15
0
static int llc_station_ac_send_null_dsap_xid_c(struct sk_buff *skb)
{
	int rc = 1;
	struct sk_buff *nskb = llc_alloc_frame(NULL, skb->dev);

	if (!nskb)
		goto out;
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, 0, LLC_PDU_CMD);
	llc_pdu_init_as_xid_cmd(nskb, LLC_XID_NULL_CLASS_2, 127);
	rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, llc_station_mac_sa);
	if (unlikely(rc))
		goto free;
	llc_station_send_pdu(nskb);
out:
	return rc;
free:
	kfree_skb(skb);
	goto out;
}
static void br_send_bpdu(struct net_bridge_port *p,
			 const unsigned char *data, int length)
{
	struct sk_buff *skb;

	skb = dev_alloc_skb(length+LLC_RESERVE);
	if (!skb)
		return;

	skb->dev = p->dev;
	skb->protocol = htons(ETH_P_802_2);

	skb_reserve(skb, LLC_RESERVE);
	memcpy(__skb_put(skb, length), data, length);

	llc_pdu_header_init(skb, LLC_PDU_TYPE_U, LLC_SAP_BSPAN,
			    LLC_SAP_BSPAN, LLC_PDU_CMD);
	llc_pdu_init_as_ui_cmd(skb);

	llc_mac_hdr_init(skb, p->dev->dev_addr, p->br->group_addr);

<<<<<<< HEAD
예제 #17
0
int llc_sap_action_send_xid_r(struct llc_sap *sap, struct sk_buff *skb)
{
	u8 mac_da[ETH_ALEN], mac_sa[ETH_ALEN], dsap;
	int rc = 1;
	struct sk_buff *nskb;

	llc_pdu_decode_sa(skb, mac_da);
	llc_pdu_decode_da(skb, mac_sa);
	llc_pdu_decode_ssap(skb, &dsap);
	nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U,
			       sizeof(struct llc_xid_info));
	if (!nskb)
		goto out;
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, dsap,
			    LLC_PDU_RSP);
	llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 0);
	rc = llc_mac_hdr_init(nskb, mac_sa, mac_da);
	if (likely(!rc))
		rc = dev_queue_xmit(nskb);
out:
	return rc;
}
예제 #18
0
static int llc_station_ac_send_test_r(struct sk_buff *skb)
{
	u8 mac_da[ETH_ALEN], dsap;
	int rc = 1;
	struct sk_buff *nskb = llc_alloc_frame(NULL, skb->dev);

	if (!nskb)
		goto out;
	rc = 0;
	llc_pdu_decode_sa(skb, mac_da);
	llc_pdu_decode_ssap(skb, &dsap);
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
	llc_pdu_init_as_test_rsp(nskb, skb);
	rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, mac_da);
	if (unlikely(rc))
		goto free;
	llc_station_send_pdu(nskb);
out:
	return rc;
free:
	kfree_skb(skb);
	goto out;
}
예제 #19
0
int llc_conn_ac_send_ack_xxx_x_set_0(struct sock *sk, struct sk_buff *skb)
{
	int rc = -ENOBUFS;
	struct llc_sock *llc = llc_sk(sk);
	struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0);

	if (nskb) {
		struct llc_sap *sap = llc->sap;

		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, 0, llc->vR);
		rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac);
		if (unlikely(rc))
			goto free;
		llc_conn_send_pdu(sk, nskb);
	}
out:
	return rc;
free:
	kfree_skb(nskb);
	goto out;
}
static int llc_station_ac_send_xid_r(struct sk_buff *skb)
{
	u8 mac_da[ETH_ALEN], dsap;
	int rc = 1;
	struct sk_buff *nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U,
					       sizeof(struct llc_xid_info));

	if (!nskb)
		goto out;
	rc = 0;
	llc_pdu_decode_sa(skb, mac_da);
	llc_pdu_decode_ssap(skb, &dsap);
	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
	llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
	rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
	if (unlikely(rc))
		goto free;
	llc_station_send_pdu(nskb);
out:
	return rc;
free:
	kfree_skb(skb);
	goto out;
}