Release 4.14 net/llc/llc_c_ev.c

Directory: net/llc
/*
 * llc_c_ev.c - Connection component state transition event qualifiers
 *
 * A 'state' consists of a number of possible event matching functions,
 * the actions associated with each being executed when that event is
 * matched; a 'state machine' accepts events in a serial fashion from an
 * event queue. Each event is passed to each successive event matching
 * function until a match is made (the event matching function returns
 * success, or '0') or the list of event matching functions is exhausted.
 * If a match is made, the actions associated with the event are executed
 * and the state is changed to that event's transition state. Before some
 * events are recognized, even after a match has been made, a certain
 * number of 'event qualifier' functions must also be executed. If these
 * all execute successfully, then the event is finally executed.
 *
 * These event functions must return 0 for success, to show a matched
 * event, of 1 if the event does not match. Event qualifier functions
 * must return a 0 for success or a non-zero for failure. Each function
 * is simply responsible for verifying one single thing and returning
 * either a success or failure.
 *
 * All of followed event functions are described in 802.2 LLC Protocol
 * standard document except two functions that we added that will explain
 * in their comments, at below.
 *
 * Copyright (c) 1997 by Procom Technology, Inc.
 *               2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */
#include <linux/netdevice.h>
#include <net/llc_conn.h>
#include <net/llc_sap.h>
#include <net/sock.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_ev.h>
#include <net/llc_pdu.h>

#if 1

#define dprintk(args...) printk(KERN_DEBUG args)
#else

#define dprintk(args...)
#endif

/**
 *      llc_util_ns_inside_rx_window - check if sequence number is in rx window
 *      @ns: sequence number of received pdu.
 *      @vr: sequence number which receiver expects to receive.
 *      @rw: receive window size of receiver.
 *
 *      Checks if sequence number of received PDU is in range of receive
 *      window. Returns 0 for success, 1 otherwise
 */


static u16 llc_util_ns_inside_rx_window(u8 ns, u8 vr, u8 rw)
{
	return !llc_circular_between(vr, ns,
				     (vr + rw - 1) % LLC_2_SEQ_NBR_MODULO);
}

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/**
 *      llc_util_nr_inside_tx_window - check if sequence number is in tx window
 *      @sk: current connection.
 *      @nr: N(R) of received PDU.
 *
 *      This routine checks if N(R) of received PDU is in range of transmit
 *      window; on the other hand checks if received PDU acknowledges some
 *      outstanding PDUs that are in transmit window. Returns 0 for success, 1
 *      otherwise.
 */


static u16 llc_util_nr_inside_tx_window(struct sock *sk, u8 nr)
{
	u8 nr1, nr2;
	struct sk_buff *skb;
	struct llc_pdu_sn *pdu;
	struct llc_sock *llc = llc_sk(sk);
	int rc = 0;

	if (llc->dev->flags & IFF_LOOPBACK)
		goto out;
	rc = 1;
	if (skb_queue_empty(&llc->pdu_unack_q))
		goto out;
	skb = skb_peek(&llc->pdu_unack_q);
	pdu = llc_pdu_sn_hdr(skb);
	nr1 = LLC_I_GET_NS(pdu);
	skb = skb_peek_tail(&llc->pdu_unack_q);
	pdu = llc_pdu_sn_hdr(skb);
	nr2 = LLC_I_GET_NS(pdu);
	rc = !llc_circular_between(nr1, nr, (nr2 + 1) % LLC_2_SEQ_NBR_MODULO);
out:
	return rc;
}

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int llc_conn_ev_conn_req(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->prim == LLC_CONN_PRIM &&
	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
}

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int llc_conn_ev_data_req(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->prim == LLC_DATA_PRIM &&
	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
}

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int llc_conn_ev_disc_req(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->prim == LLC_DISC_PRIM &&
	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
}

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int llc_conn_ev_rst_req(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->prim == LLC_RESET_PRIM &&
	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
}

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int llc_conn_ev_local_busy_detected(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
	       ev->prim_type == LLC_CONN_EV_LOCAL_BUSY_DETECTED ? 0 : 1;
}

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int llc_conn_ev_local_busy_cleared(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
	       ev->prim_type == LLC_CONN_EV_LOCAL_BUSY_CLEARED ? 0 : 1;
}

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int llc_conn_ev_rx_bad_pdu(struct sock *sk, struct sk_buff *skb)
{
	return 1;
}

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int llc_conn_ev_rx_disc_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
	       LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_DISC ? 0 : 1;
}

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int llc_conn_ev_rx_dm_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
	       LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_DM ? 0 : 1;
}

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int llc_conn_ev_rx_frmr_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
	       LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_FRMR ? 0 : 1;
}

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int llc_conn_ev_rx_i_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_0(pdu) &&
	       LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
}

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int llc_conn_ev_rx_i_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_1(pdu) &&
	       LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
}

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int llc_conn_ev_rx_i_cmd_pbit_set_0_unexpd_ns(struct sock *sk,
					      struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_0(pdu) && ns != vr &&
	       !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
}

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int llc_conn_ev_rx_i_cmd_pbit_set_1_unexpd_ns(struct sock *sk,
					      struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_1(pdu) && ns != vr &&
	       !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
}

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int llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns(struct sock *sk,
					     struct sk_buff *skb)
{
	const struct llc_pdu_sn * pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);
	const u16 rc = LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
		ns != vr &&
		 llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
	if (!rc)
		dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
			__func__, llc_sk(sk)->state, ns, vr);
	return rc;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_0(pdu) &&
	       LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_1(pdu) &&
	       LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_0_unexpd_ns(struct sock *sk,
					      struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_0(pdu) && ns != vr &&
	       !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_1_unexpd_ns(struct sock *sk,
					      struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
	       LLC_I_PF_IS_1(pdu) && ns != vr &&
	       !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_x_unexpd_ns(struct sock *sk,
					      struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) && ns != vr &&
	       !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
}

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int llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns(struct sock *sk,
					     struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vr = llc_sk(sk)->vR;
	const u8 ns = LLC_I_GET_NS(pdu);
	const u16 rc = LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
		ns != vr &&
		 llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
	if (!rc)
		dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
			__func__, llc_sk(sk)->state, ns, vr);
	return rc;
}

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int llc_conn_ev_rx_rej_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_REJ ? 0 : 1;
}

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int llc_conn_ev_rx_rej_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_REJ ? 0 : 1;
}

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int llc_conn_ev_rx_rej_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
}

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int llc_conn_ev_rx_rej_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
}

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int llc_conn_ev_rx_rej_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
}

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int llc_conn_ev_rx_rnr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RNR ? 0 : 1;
}

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int llc_conn_ev_rx_rnr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RNR ? 0 : 1;
}

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int llc_conn_ev_rx_rnr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RNR ? 0 : 1;
}

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int llc_conn_ev_rx_rnr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RNR ? 0 : 1;
}

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int llc_conn_ev_rx_rr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RR ? 0 : 1;
}

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int llc_conn_ev_rx_rr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RR ? 0 : 1;
}

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int llc_conn_ev_rx_rr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_0(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RR ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 60 100.00% 6 100.00%
Total 60 100.00% 6 100.00%



int llc_conn_ev_rx_rr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	return llc_conn_space(sk, skb) &&
	       LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
	       LLC_S_PF_IS_1(pdu) &&
	       LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RR ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 60 100.00% 6 100.00%
Total 60 100.00% 6 100.00%



int llc_conn_ev_rx_sabme_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
	       LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_SABME ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 48 100.00% 5 100.00%
Total 48 100.00% 5 100.00%



int llc_conn_ev_rx_ua_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
	       LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_UA ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 47 100.00% 4 100.00%
Total 47 100.00% 4 100.00%



int llc_conn_ev_rx_xxx_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
{
	u16 rc = 1;
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);

	if (LLC_PDU_IS_CMD(pdu)) {
		if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) {
			if (LLC_I_PF_IS_1(pdu))
				rc = 0;
		} else if (LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PF_IS_1(pdu))
			rc = 0;
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 85 100.00% 5 100.00%
Total 85 100.00% 5 100.00%



int llc_conn_ev_rx_xxx_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	u16 rc = 1;
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	if (LLC_PDU_IS_CMD(pdu)) {
		if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu))
			rc = 0;
		else if (LLC_PDU_TYPE_IS_U(pdu))
			switch (LLC_U_PDU_CMD(pdu)) {
			case LLC_2_PDU_CMD_SABME:
			case LLC_2_PDU_CMD_DISC:
				rc = 0;
				break;
			}
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 87 100.00% 5 100.00%
Total 87 100.00% 5 100.00%



int llc_conn_ev_rx_xxx_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
{
	u16 rc = 1;
	const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);

	if (LLC_PDU_IS_RSP(pdu)) {
		if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu))
			rc = 0;
		else if (LLC_PDU_TYPE_IS_U(pdu))
			switch (LLC_U_PDU_RSP(pdu)) {
			case LLC_2_PDU_RSP_UA:
			case LLC_2_PDU_RSP_DM:
			case LLC_2_PDU_RSP_FRMR:
				rc = 0;
				break;
			}
	}

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 90 100.00% 5 100.00%
Total 90 100.00% 5 100.00%



int llc_conn_ev_rx_zzz_cmd_pbit_set_x_inval_nr(struct sock *sk,
					       struct sk_buff *skb)
{
	u16 rc = 1;
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vs = llc_sk(sk)->vS;
	const u8 nr = LLC_I_GET_NR(pdu);

	if (LLC_PDU_IS_CMD(pdu) &&
	    (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) &&
	    nr != vs && llc_util_nr_inside_tx_window(sk, nr)) {
		dprintk("%s: matched, state=%d, vs=%d, nr=%d\n",
			__func__, llc_sk(sk)->state, vs, nr);
		rc = 0;
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 107 99.07% 6 85.71%
Harvey Harrison 1 0.93% 1 14.29%
Total 108 100.00% 7 100.00%



int llc_conn_ev_rx_zzz_rsp_fbit_set_x_inval_nr(struct sock *sk,
					       struct sk_buff *skb)
{
	u16 rc = 1;
	const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
	const u8 vs = llc_sk(sk)->vS;
	const u8 nr = LLC_I_GET_NR(pdu);

	if (LLC_PDU_IS_RSP(pdu) &&
	    (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) &&
	    nr != vs && llc_util_nr_inside_tx_window(sk, nr)) {
		rc = 0;
		dprintk("%s: matched, state=%d, vs=%d, nr=%d\n",
			__func__, llc_sk(sk)->state, vs, nr);
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 107 99.07% 6 85.71%
Harvey Harrison 1 0.93% 1 14.29%
Total 108 100.00% 7 100.00%



int llc_conn_ev_rx_any_frame(struct sock *sk, struct sk_buff *skb)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 18 100.00% 2 100.00%
Total 18 100.00% 2 100.00%



int llc_conn_ev_p_tmr_exp(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type != LLC_CONN_EV_TYPE_P_TMR;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 33 100.00% 3 100.00%
Total 33 100.00% 3 100.00%



int llc_conn_ev_ack_tmr_exp(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type != LLC_CONN_EV_TYPE_ACK_TMR;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 33 100.00% 3 100.00%
Total 33 100.00% 3 100.00%



int llc_conn_ev_rej_tmr_exp(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type != LLC_CONN_EV_TYPE_REJ_TMR;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 33 100.00% 3 100.00%
Total 33 100.00% 3 100.00%



int llc_conn_ev_busy_tmr_exp(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type != LLC_CONN_EV_TYPE_BUSY_TMR;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 33 100.00% 3 100.00%
Total 33 100.00% 3 100.00%



int llc_conn_ev_init_p_f_cycle(struct sock *sk, struct sk_buff *skb)
{
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 18 100.00% 2 100.00%
Total 18 100.00% 2 100.00%



int llc_conn_ev_tx_buffer_full(struct sock *sk, struct sk_buff *skb)
{
	const struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
	       ev->prim_type == LLC_CONN_EV_TX_BUFF_FULL ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 43 100.00% 4 100.00%
Total 43 100.00% 4 100.00%

/* Event qualifier functions
 *
 * these functions simply verify the value of a state flag associated with
 * the connection and return either a 0 for success or a non-zero value
 * for not-success; verify the event is the type we expect
 */


int llc_conn_ev_qlfy_data_flag_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->data_flag != 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 25 100.00% 2 100.00%
Total 25 100.00% 2 100.00%



int llc_conn_ev_qlfy_data_flag_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->data_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



int llc_conn_ev_qlfy_data_flag_eq_2(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->data_flag != 2;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 25 100.00% 2 100.00%
Total 25 100.00% 2 100.00%



int llc_conn_ev_qlfy_p_flag_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->p_flag != 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 25 100.00% 2 100.00%
Total 25 100.00% 2 100.00%

/**
 *      conn_ev_qlfy_last_frame_eq_1 - checks if frame is last in tx window
 *      @sk: current connection structure.
 *      @skb: current event.
 *
 *      This function determines when frame which is sent, is last frame of
 *      transmit window, if it is then this function return zero else return
 *      one.  This function is used for sending last frame of transmit window
 *      as I-format command with p-bit set to one. Returns 0 if frame is last
 *      frame, 1 otherwise.
 */


int llc_conn_ev_qlfy_last_frame_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return !(skb_queue_len(&llc_sk(sk)->pdu_unack_q) + 1 == llc_sk(sk)->k);
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 39 100.00% 2 100.00%
Total 39 100.00% 2 100.00%

/**
 *      conn_ev_qlfy_last_frame_eq_0 - checks if frame isn't last in tx window
 *      @sk: current connection structure.
 *      @skb: current event.
 *
 *      This function determines when frame which is sent, isn't last frame of
 *      transmit window, if it isn't then this function return zero else return
 *      one. Returns 0 if frame isn't last frame, 1 otherwise.
 */


int llc_conn_ev_qlfy_last_frame_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return skb_queue_len(&llc_sk(sk)->pdu_unack_q) + 1 == llc_sk(sk)->k;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 36 100.00% 2 100.00%
Total 36 100.00% 2 100.00%



int llc_conn_ev_qlfy_p_flag_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->p_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



int llc_conn_ev_qlfy_p_flag_eq_f(struct sock *sk, struct sk_buff *skb)
{
	u8 f_bit;

	llc_pdu_decode_pf_bit(skb, &f_bit);
	return llc_sk(sk)->p_flag == f_bit ? 0 : 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 40 100.00% 2 100.00%
Total 40 100.00% 2 100.00%



int llc_conn_ev_qlfy_remote_busy_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->remote_busy_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



int llc_conn_ev_qlfy_remote_busy_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return !llc_sk(sk)->remote_busy_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 24 100.00% 2 100.00%
Total 24 100.00% 2 100.00%



int llc_conn_ev_qlfy_retry_cnt_lt_n2(struct sock *sk, struct sk_buff *skb)
{
	return !(llc_sk(sk)->retry_count < llc_sk(sk)->n2);
}

Contributors
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Arnaldo Carvalho de Melo 33 100.00% 2 100.00%
Total 33 100.00% 2 100.00%



int llc_conn_ev_qlfy_retry_cnt_gte_n2(struct sock *sk, struct sk_buff *skb)
{
	return !(llc_sk(sk)->retry_count >= llc_sk(sk)->n2);
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 33 100.00% 2 100.00%
Total 33 100.00% 2 100.00%



int llc_conn_ev_qlfy_s_flag_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return !llc_sk(sk)->s_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 24 100.00% 2 100.00%
Total 24 100.00% 2 100.00%



int llc_conn_ev_qlfy_s_flag_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->s_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



int llc_conn_ev_qlfy_cause_flag_eq_1(struct sock *sk, struct sk_buff *skb)
{
	return !llc_sk(sk)->cause_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 24 100.00% 2 100.00%
Total 24 100.00% 2 100.00%



int llc_conn_ev_qlfy_cause_flag_eq_0(struct sock *sk, struct sk_buff *skb)
{
	return llc_sk(sk)->cause_flag;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_conn(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_CONN;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_disc(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_DISC;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_failed(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_FAILED;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_remote_busy(struct sock *sk,
					    struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_REMOTE_BUSY;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_refuse(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_REFUSE;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_conflict(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_CONFLICT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%



int llc_conn_ev_qlfy_set_status_rst_done(struct sock *sk, struct sk_buff *skb)
{
	struct llc_conn_state_ev *ev = llc_conn_ev(skb);

	ev->status = LLC_STATUS_RESET_DONE;
	return 0;
}
Contributors
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Arnaldo Carvalho de Melo 34 100.00% 2 100.00%
Total 34 100.00% 2 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Arnaldo Carvalho de Melo 3755 99.87% 11 84.62%
Harvey Harrison 4 0.11% 1 7.69%
David S. Miller 1 0.03% 1 7.69%
Total 3760 100.00% 13 100.00%
Directory: net/llc

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Arnaldo Carvalho de Melo	34	100.00%	1	100.00%
Total	34	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 net/llc/llc_c_ev.c

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