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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 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 llc_sap_action_t llc_sap_inactive_state_actions_1[] = { |
33 | [0] = llc_sap_action_report_status, |
34 | [1] = NULL, |
35 | }; |
36 | |
37 | static 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 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 llc_sap_action_t llc_sap_active_state_actions_1[] = { |
51 | [0] = llc_sap_action_unitdata_ind, |
52 | [1] = NULL, |
53 | }; |
54 | |
55 | static 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 llc_sap_action_t llc_sap_active_state_actions_2[] = { |
63 | [0] = llc_sap_action_send_ui, |
64 | [1] = NULL, |
65 | }; |
66 | |
67 | static 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 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 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 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 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 llc_sap_action_t llc_sap_active_state_actions_5[] = { |
99 | [0] = llc_sap_action_xid_ind, |
100 | [1] = NULL, |
101 | }; |
102 | |
103 | static 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 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 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 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 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 llc_sap_action_t llc_sap_active_state_actions_8[] = { |
135 | [0] = llc_sap_action_test_ind, |
136 | [1] = NULL, |
137 | }; |
138 | |
139 | static 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 llc_sap_action_t llc_sap_active_state_actions_9[] = { |
149 | [0] = llc_sap_action_report_status, |
150 | [1] = NULL, |
151 | }; |
152 | |
153 | static 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 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 |
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