net/llc/llc_s_st.c

0001 /*
0002  * llc_s_st.c - Defines SAP component state machine transitions.
0003  *
0004  * The followed transitions are SAP component state machine transitions
0005  * which are described in 802.2 LLC protocol standard document.
0006  *
0007  * Copyright (c) 1997 by Procom Technology, Inc.
0008  *       2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
0009  *
0010  * This program can be redistributed or modified under the terms of the
0011  * GNU General Public License as published by the Free Software Foundation.
0012  * This program is distributed without any warranty or implied warranty
0013  * of merchantability or fitness for a particular purpose.
0014  *
0015  * See the GNU General Public License for more details.
0016  */
0017 #include <linux/types.h>
0018 #include <net/llc_if.h>
0019 #include <net/llc_s_ev.h>
0020 #include <net/llc_s_ac.h>
0021 #include <net/llc_s_st.h>
0022
0023 /* dummy last-transition indicator; common to all state transition groups
0024  * last entry for this state
0025  * all members are zeros, .bss zeroes it
0026  */
0027 static struct llc_sap_state_trans llc_sap_state_trans_end;
0028
0029 /* state LLC_SAP_STATE_INACTIVE transition for
0030  * LLC_SAP_EV_ACTIVATION_REQ event
0031  */
0032 static const llc_sap_action_t llc_sap_inactive_state_actions_1[] = {
0033     [0] = llc_sap_action_report_status,
0034     [1] = NULL,
0035 };
0036
0037 static struct llc_sap_state_trans llc_sap_inactive_state_trans_1 = {
0038     .ev =       llc_sap_ev_activation_req,
0039     .next_state =   LLC_SAP_STATE_ACTIVE,
0040     .ev_actions =   llc_sap_inactive_state_actions_1,
0041 };
0042
0043 /* array of pointers; one to each transition */
0044 static struct llc_sap_state_trans *llc_sap_inactive_state_transitions[] = {
0045     [0] = &llc_sap_inactive_state_trans_1,
0046     [1] = &llc_sap_state_trans_end,
0047 };
0048
0049 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_UI event */
0050 static const llc_sap_action_t llc_sap_active_state_actions_1[] = {
0051     [0] = llc_sap_action_unitdata_ind,
0052     [1] = NULL,
0053 };
0054
0055 static struct llc_sap_state_trans llc_sap_active_state_trans_1 = {
0056     .ev =       llc_sap_ev_rx_ui,
0057     .next_state =   LLC_SAP_STATE_ACTIVE,
0058     .ev_actions =   llc_sap_active_state_actions_1,
0059 };
0060
0061 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_UNITDATA_REQ event */
0062 static const llc_sap_action_t llc_sap_active_state_actions_2[] = {
0063     [0] = llc_sap_action_send_ui,
0064     [1] = NULL,
0065 };
0066
0067 static struct llc_sap_state_trans llc_sap_active_state_trans_2 = {
0068     .ev =       llc_sap_ev_unitdata_req,
0069     .next_state =   LLC_SAP_STATE_ACTIVE,
0070     .ev_actions =   llc_sap_active_state_actions_2,
0071 };
0072
0073 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_XID_REQ event */
0074 static const llc_sap_action_t llc_sap_active_state_actions_3[] = {
0075     [0] = llc_sap_action_send_xid_c,
0076     [1] = NULL,
0077 };
0078
0079 static struct llc_sap_state_trans llc_sap_active_state_trans_3 = {
0080     .ev =       llc_sap_ev_xid_req,
0081     .next_state =   LLC_SAP_STATE_ACTIVE,
0082     .ev_actions =   llc_sap_active_state_actions_3,
0083 };
0084
0085 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_C event */
0086 static const llc_sap_action_t llc_sap_active_state_actions_4[] = {
0087     [0] = llc_sap_action_send_xid_r,
0088     [1] = NULL,
0089 };
0090
0091 static struct llc_sap_state_trans llc_sap_active_state_trans_4 = {
0092     .ev =       llc_sap_ev_rx_xid_c,
0093     .next_state =   LLC_SAP_STATE_ACTIVE,
0094     .ev_actions =   llc_sap_active_state_actions_4,
0095 };
0096
0097 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_XID_R event */
0098 static const llc_sap_action_t llc_sap_active_state_actions_5[] = {
0099     [0] = llc_sap_action_xid_ind,
0100     [1] = NULL,
0101 };
0102
0103 static struct llc_sap_state_trans llc_sap_active_state_trans_5 = {
0104     .ev =       llc_sap_ev_rx_xid_r,
0105     .next_state =   LLC_SAP_STATE_ACTIVE,
0106     .ev_actions =   llc_sap_active_state_actions_5,
0107 };
0108
0109 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_TEST_REQ event */
0110 static const llc_sap_action_t llc_sap_active_state_actions_6[] = {
0111     [0] = llc_sap_action_send_test_c,
0112     [1] = NULL,
0113 };
0114
0115 static struct llc_sap_state_trans llc_sap_active_state_trans_6 = {
0116     .ev =       llc_sap_ev_test_req,
0117     .next_state =   LLC_SAP_STATE_ACTIVE,
0118     .ev_actions =   llc_sap_active_state_actions_6,
0119 };
0120
0121 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_C event */
0122 static const llc_sap_action_t llc_sap_active_state_actions_7[] = {
0123     [0] = llc_sap_action_send_test_r,
0124     [1] = NULL,
0125 };
0126
0127 static struct llc_sap_state_trans llc_sap_active_state_trans_7 = {
0128     .ev =       llc_sap_ev_rx_test_c,
0129     .next_state =   LLC_SAP_STATE_ACTIVE,
0130     .ev_actions =   llc_sap_active_state_actions_7
0131 };
0132
0133 /* state LLC_SAP_STATE_ACTIVE transition for LLC_SAP_EV_RX_TEST_R event */
0134 static const llc_sap_action_t llc_sap_active_state_actions_8[] = {
0135     [0] = llc_sap_action_test_ind,
0136     [1] = NULL,
0137 };
0138
0139 static struct llc_sap_state_trans llc_sap_active_state_trans_8 = {
0140     .ev =       llc_sap_ev_rx_test_r,
0141     .next_state =   LLC_SAP_STATE_ACTIVE,
0142     .ev_actions =   llc_sap_active_state_actions_8,
0143 };
0144
0145 /* state LLC_SAP_STATE_ACTIVE transition for
0146  * LLC_SAP_EV_DEACTIVATION_REQ event
0147  */
0148 static const llc_sap_action_t llc_sap_active_state_actions_9[] = {
0149     [0] = llc_sap_action_report_status,
0150     [1] = NULL,
0151 };
0152
0153 static struct llc_sap_state_trans llc_sap_active_state_trans_9 = {
0154     .ev =       llc_sap_ev_deactivation_req,
0155     .next_state =   LLC_SAP_STATE_INACTIVE,
0156     .ev_actions =   llc_sap_active_state_actions_9
0157 };
0158
0159 /* array of pointers; one to each transition */
0160 static struct llc_sap_state_trans *llc_sap_active_state_transitions[] = {
0161     [0] = &llc_sap_active_state_trans_2,
0162     [1] = &llc_sap_active_state_trans_1,
0163     [2] = &llc_sap_active_state_trans_3,
0164     [3] = &llc_sap_active_state_trans_4,
0165     [4] = &llc_sap_active_state_trans_5,
0166     [5] = &llc_sap_active_state_trans_6,
0167     [6] = &llc_sap_active_state_trans_7,
0168     [7] = &llc_sap_active_state_trans_8,
0169     [8] = &llc_sap_active_state_trans_9,
0170     [9] = &llc_sap_state_trans_end,
0171 };
0172
0173 /* SAP state transition table */
0174 struct llc_sap_state llc_sap_state_table[LLC_NR_SAP_STATES] = {
0175     [LLC_SAP_STATE_INACTIVE - 1] = {
0176         .curr_state = LLC_SAP_STATE_INACTIVE,
0177         .transitions    = llc_sap_inactive_state_transitions,
0178     },
0179     [LLC_SAP_STATE_ACTIVE - 1] = {
0180         .curr_state = LLC_SAP_STATE_ACTIVE,
0181         .transitions    = llc_sap_active_state_transitions,
0182     },
0183 };