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 */
27 static const 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 */
32 static const llc_sap_action_t llc_sap_inactive_state_actions_1[] = {
33 [0] = llc_sap_action_report_status,
34 [1] = NULL,
35 };
36
37 static const 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 */
44 static const 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 */
50 static const llc_sap_action_t llc_sap_active_state_actions_1[] = {
51 [0] = llc_sap_action_unitdata_ind,
52 [1] = NULL,
53 };
54
55 static const 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 */
62 static const llc_sap_action_t llc_sap_active_state_actions_2[] = {
63 [0] = llc_sap_action_send_ui,
64 [1] = NULL,
65 };
66
67 static const 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 */
74 static const llc_sap_action_t llc_sap_active_state_actions_3[] = {
75 [0] = llc_sap_action_send_xid_c,
76 [1] = NULL,
77 };
78
79 static const 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 */
86 static const llc_sap_action_t llc_sap_active_state_actions_4[] = {
87 [0] = llc_sap_action_send_xid_r,
88 [1] = NULL,
89 };
90
91 static const 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 */
98 static const llc_sap_action_t llc_sap_active_state_actions_5[] = {
99 [0] = llc_sap_action_xid_ind,
100 [1] = NULL,
101 };
102
103 static const 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 */
110 static const llc_sap_action_t llc_sap_active_state_actions_6[] = {
111 [0] = llc_sap_action_send_test_c,
112 [1] = NULL,
113 };
114
115 static const 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 */
122 static const llc_sap_action_t llc_sap_active_state_actions_7[] = {
123 [0] = llc_sap_action_send_test_r,
124 [1] = NULL,
125 };
126
127 static const 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 */
134 static const llc_sap_action_t llc_sap_active_state_actions_8[] = {
135 [0] = llc_sap_action_test_ind,
136 [1] = NULL,
137 };
138
139 static const 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 */
148 static const llc_sap_action_t llc_sap_active_state_actions_9[] = {
149 [0] = llc_sap_action_report_status,
150 [1] = NULL,
151 };
152
153 static const 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 */
160 static const 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 */
174 struct 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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.