LXR linux/net/llc/llc_s

   1/*
   2 * llc_s_st.c - Defines SAP component state machine transitions.
   3 *
   4 * The followed transitions are SAP component state machine transitions
   5 * which are described in 802.2 LLC protocol standard document.
   6 *
   7 * Copyright (c) 1997 by Procom Technology, Inc.
   8 *               2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   9 *
  10 * This program can be redistributed or modified under the terms of the
  11 * GNU General Public License as published by the Free Software Foundation.
  12 * This program is distributed without any warranty or implied warranty
  13 * of merchantability or fitness for a particular purpose.
  14 *
  15 * See the GNU General Public License for more details.
  16 */
  17#include <linux/types.h>
  18#include <net/llc_if.h>
  19#include <net/llc_s_ev.h>
  20#include <net/llc_s_ac.h>
  21#include <net/llc_s_st.h>
  22
  23/* dummy last-transition indicator; common to all state transition groups
  24 * last entry for this state
  25 * all members are zeros, .bss zeroes it
  26 */
  27static struct llc_sap_state_trans llc_sap_state_trans_end;
  28
  29/* state LLC_SAP_STATE_INACTIVE transition for
  30 * LLC_SAP_EV_ACTIVATION_REQ event
  31 */
  32static llc_sap_action_t llc_sap_inactive_state_actions_1[] = {
  33        [0] = llc_sap_action_report_status,
  34        [1] = NULL,
  35};
  36
  37static struct llc_sap_state_trans llc_sap_inactive_state_trans_1 = {
  38        .ev =           llc_sap_ev_activation_req,
  39        .next_state =   LLC_SAP_STATE_ACTIVE,
  40        .ev_actions =   llc_sap_inactive_state_actions_1,
  41};
  42
  43/* array of pointers; one to each transition */
  44static struct llc_sap_state_trans *llc_sap_inactive_state_transitions[] = {
  45        [0] = &llc_sap_inactive_state_trans_1,
  46        [1] = &llc_sap_state_trans_end,
  47};
  48
  49/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_UI event */
  50static llc_sap_action_t llc_sap_active_state_actions_1[] = {
  51        [0] = llc_sap_action_unitdata_ind,
  52        [1] = NULL,
  53};
  54
  55static struct llc_sap_state_trans llc_sap_active_state_trans_1 = {
  56        .ev =           llc_sap_ev_rx_ui,
  57        .next_state =   LLC_SAP_STATE_ACTIVE,
  58        .ev_actions =   llc_sap_active_state_actions_1,
  59};
  60
  61/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_UNITDATA_REQ event */
  62static llc_sap_action_t llc_sap_active_state_actions_2[] = {
  63        [0] = llc_sap_action_send_ui,
  64        [1] = NULL,
  65};
  66
  67static struct llc_sap_state_trans llc_sap_active_state_trans_2 = {
  68        .ev =           llc_sap_ev_unitdata_req,
  69        .next_state =   LLC_SAP_STATE_ACTIVE,
  70        .ev_actions =   llc_sap_active_state_actions_2,
  71};
  72
  73/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_XID_REQ event */
  74static llc_sap_action_t llc_sap_active_state_actions_3[] = {
  75        [0] = llc_sap_action_send_xid_c,
  76        [1] = NULL,
  77};
  78
  79static struct llc_sap_state_trans llc_sap_active_state_trans_3 = {
  80        .ev =           llc_sap_ev_xid_req,
  81        .next_state =   LLC_SAP_STATE_ACTIVE,
  82        .ev_actions =   llc_sap_active_state_actions_3,
  83};
  84
  85/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_C event */
  86static llc_sap_action_t llc_sap_active_state_actions_4[] = {
  87        [0] = llc_sap_action_send_xid_r,
  88        [1] = NULL,
  89};
  90
  91static struct llc_sap_state_trans llc_sap_active_state_trans_4 = {
  92        .ev =           llc_sap_ev_rx_xid_c,
  93        .next_state =   LLC_SAP_STATE_ACTIVE,
  94        .ev_actions =   llc_sap_active_state_actions_4,
  95};
  96
  97/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_R event */
  98static llc_sap_action_t llc_sap_active_state_actions_5[] = {
  99        [0] = llc_sap_action_xid_ind,
 100        [1] = NULL,
 101};
 102
 103static struct llc_sap_state_trans llc_sap_active_state_trans_5 = {
 104        .ev =           llc_sap_ev_rx_xid_r,
 105        .next_state =   LLC_SAP_STATE_ACTIVE,
 106        .ev_actions =   llc_sap_active_state_actions_5,
 107};
 108
 109/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_TEST_REQ event */
 110static llc_sap_action_t llc_sap_active_state_actions_6[] = {
 111        [0] = llc_sap_action_send_test_c,
 112        [1] = NULL,
 113};
 114
 115static struct llc_sap_state_trans llc_sap_active_state_trans_6 = {
 116        .ev =           llc_sap_ev_test_req,
 117        .next_state =   LLC_SAP_STATE_ACTIVE,
 118        .ev_actions =   llc_sap_active_state_actions_6,
 119};
 120
 121/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_C event */
 122static llc_sap_action_t llc_sap_active_state_actions_7[] = {
 123        [0] = llc_sap_action_send_test_r,
 124        [1] = NULL,
 125};
 126
 127static struct llc_sap_state_trans llc_sap_active_state_trans_7 = {
 128        .ev =           llc_sap_ev_rx_test_c,
 129        .next_state =   LLC_SAP_STATE_ACTIVE,
 130        .ev_actions =   llc_sap_active_state_actions_7
 131};
 132
 133/* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_R event */
 134static llc_sap_action_t llc_sap_active_state_actions_8[] = {
 135        [0] = llc_sap_action_test_ind,
 136        [1] = NULL,
 137};
 138
 139static struct llc_sap_state_trans llc_sap_active_state_trans_8 = {
 140        .ev =           llc_sap_ev_rx_test_r,
 141        .next_state =   LLC_SAP_STATE_ACTIVE,
 142        .ev_actions =   llc_sap_active_state_actions_8,
 143};
 144
 145/* state LLC_SAP_STATE_ACTIVE transition for
 146 * LLC_SAP_EV_DEACTIVATION_REQ event
 147 */
 148static llc_sap_action_t llc_sap_active_state_actions_9[] = {
 149        [0] = llc_sap_action_report_status,
 150        [1] = NULL,
 151};
 152
 153static struct llc_sap_state_trans llc_sap_active_state_trans_9 = {
 154        .ev =           llc_sap_ev_deactivation_req,
 155        .next_state =   LLC_SAP_STATE_INACTIVE,
 156        .ev_actions =   llc_sap_active_state_actions_9
 157};
 158
 159/* array of pointers; one to each transition */
 160static struct llc_sap_state_trans *llc_sap_active_state_transitions[] = {
 161        [0] = &llc_sap_active_state_trans_2,
 162        [1] = &llc_sap_active_state_trans_1,
 163        [2] = &llc_sap_active_state_trans_3,
 164        [3] = &llc_sap_active_state_trans_4,
 165        [4] = &llc_sap_active_state_trans_5,
 166        [5] = &llc_sap_active_state_trans_6,
 167        [6] = &llc_sap_active_state_trans_7,
 168        [7] = &llc_sap_active_state_trans_8,
 169        [8] = &llc_sap_active_state_trans_9,
 170        [9] = &llc_sap_state_trans_end,
 171};
 172
 173/* SAP state transition table */
 174struct llc_sap_state llc_sap_state_table[LLC_NR_SAP_STATES] = {
 175        [LLC_SAP_STATE_INACTIVE - 1] = {
 176                .curr_state     = LLC_SAP_STATE_INACTIVE,
 177                .transitions    = llc_sap_inactive_state_transitions,
 178        },
 179        [LLC_SAP_STATE_ACTIVE - 1] = {
 180                .curr_state     = LLC_SAP_STATE_ACTIVE,
 181                .transitions    = llc_sap_active_state_transitions,
 182        },
 183};
 184