llc_s_st.c

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/*
 * llc_s_st.c - Defines SAP component state machine transitions.
 *
 * The followed transitions are SAP component state machine transitions
 * which are described in 802.2 LLC protocol standard document.
 *
 * Copyright (c) 1997 by Procom Technology, Inc.
 *       2001-2003 by Arnaldo Carvalho de Melo <[email protected]>
 *
 * 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/types.h>
#include <net/llc_if.h>
#include <net/llc_s_ev.h>
#include <net/llc_s_ac.h>
#include <net/llc_s_st.h>

/* dummy last-transition indicator; common to all state transition groups
 * last entry for this state
 * all members are zeros, .bss zeroes it
 */
static struct llc_sap_state_trans llc_sap_state_trans_end;

/* state LLC_SAP_STATE_INACTIVE transition for
 * LLC_SAP_EV_ACTIVATION_REQ event
 */
static llc_sap_action_t llc_sap_inactive_state_actions_1[] = {
    [0] = llc_sap_action_report_status,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_inactive_state_trans_1 = {
    .ev =       llc_sap_ev_activation_req,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_inactive_state_actions_1,
};

/* array of pointers; one to each transition */
static struct llc_sap_state_trans *llc_sap_inactive_state_transitions[] = {
    [0] = &llc_sap_inactive_state_trans_1,
    [1] = &llc_sap_state_trans_end,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_UI event */
static llc_sap_action_t llc_sap_active_state_actions_1[] = {
    [0] = llc_sap_action_unitdata_ind,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_1 = {
    .ev =       llc_sap_ev_rx_ui,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_1,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_UNITDATA_REQ event */
static llc_sap_action_t llc_sap_active_state_actions_2[] = {
    [0] = llc_sap_action_send_ui,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_2 = {
    .ev =       llc_sap_ev_unitdata_req,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_2,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_XID_REQ event */
static llc_sap_action_t llc_sap_active_state_actions_3[] = {
    [0] = llc_sap_action_send_xid_c,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_3 = {
    .ev =       llc_sap_ev_xid_req,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_3,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_C event */
static llc_sap_action_t llc_sap_active_state_actions_4[] = {
    [0] = llc_sap_action_send_xid_r,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_4 = {
    .ev =       llc_sap_ev_rx_xid_c,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_4,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_R event */
static llc_sap_action_t llc_sap_active_state_actions_5[] = {
    [0] = llc_sap_action_xid_ind,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_5 = {
    .ev =       llc_sap_ev_rx_xid_r,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_5,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_TEST_REQ event */
static llc_sap_action_t llc_sap_active_state_actions_6[] = {
    [0] = llc_sap_action_send_test_c,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_6 = {
    .ev =       llc_sap_ev_test_req,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_6,
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_C event */
static llc_sap_action_t llc_sap_active_state_actions_7[] = {
    [0] = llc_sap_action_send_test_r,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_7 = {
    .ev =       llc_sap_ev_rx_test_c,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_7
};

/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_R event */
static llc_sap_action_t llc_sap_active_state_actions_8[] = {
    [0] = llc_sap_action_test_ind,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_8 = {
    .ev =       llc_sap_ev_rx_test_r,
    .next_state =   LLC_SAP_STATE_ACTIVE,
    .ev_actions =   llc_sap_active_state_actions_8,
};

/* state LLC_SAP_STATE_ACTIVE transition for
 * LLC_SAP_EV_DEACTIVATION_REQ event
 */
static llc_sap_action_t llc_sap_active_state_actions_9[] = {
    [0] = llc_sap_action_report_status,
    [1] = NULL,
};

static struct llc_sap_state_trans llc_sap_active_state_trans_9 = {
    .ev =       llc_sap_ev_deactivation_req,
    .next_state =   LLC_SAP_STATE_INACTIVE,
    .ev_actions =   llc_sap_active_state_actions_9
};

/* array of pointers; one to each transition */
static struct llc_sap_state_trans *llc_sap_active_state_transitions[] = {
    [0] = &llc_sap_active_state_trans_2,
    [1] = &llc_sap_active_state_trans_1,
    [2] = &llc_sap_active_state_trans_3,
    [3] = &llc_sap_active_state_trans_4,
    [4] = &llc_sap_active_state_trans_5,
    [5] = &llc_sap_active_state_trans_6,
    [6] = &llc_sap_active_state_trans_7,
    [7] = &llc_sap_active_state_trans_8,
    [8] = &llc_sap_active_state_trans_9,
    [9] = &llc_sap_state_trans_end,
};

/* SAP state transition table */
struct llc_sap_state llc_sap_state_table[LLC_NR_SAP_STATES] = {
    [LLC_SAP_STATE_INACTIVE - 1] = {
        .curr_state = LLC_SAP_STATE_INACTIVE,
        .transitions    = llc_sap_inactive_state_transitions,
    },
    [LLC_SAP_STATE_ACTIVE - 1] = {
        .curr_state = LLC_SAP_STATE_ACTIVE,
        .transitions    = llc_sap_active_state_transitions,
    },
};