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llc_c_ev.h
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1 #ifndef LLC_C_EV_H
2 #define LLC_C_EV_H
3 /*
4  * Copyright (c) 1997 by Procom Technology,Inc.
5  * 2001 by Arnaldo Carvalho de Melo <[email protected]>
6  *
7  * This program can be redistributed or modified under the terms of the
8  * GNU General Public License as published by the Free Software Foundation.
9  * This program is distributed without any warranty or implied warranty
10  * of merchantability or fitness for a particular purpose.
11  *
12  * See the GNU General Public License for more details.
13  */
14 
15 #include <net/sock.h>
16 
17 /* Connection component state transition event qualifiers */
18 /* Types of events (possible values in 'ev->type') */
19 #define LLC_CONN_EV_TYPE_SIMPLE 1
20 #define LLC_CONN_EV_TYPE_CONDITION 2
21 #define LLC_CONN_EV_TYPE_PRIM 3
22 #define LLC_CONN_EV_TYPE_PDU 4 /* command/response PDU */
23 #define LLC_CONN_EV_TYPE_ACK_TMR 5
24 #define LLC_CONN_EV_TYPE_P_TMR 6
25 #define LLC_CONN_EV_TYPE_REJ_TMR 7
26 #define LLC_CONN_EV_TYPE_BUSY_TMR 8
27 #define LLC_CONN_EV_TYPE_RPT_STATUS 9
28 #define LLC_CONN_EV_TYPE_SENDACK_TMR 10
29 
30 #define NBR_CONN_EV 5
31 /* Connection events which cause state transitions when fully qualified */
32 
33 #define LLC_CONN_EV_CONN_REQ 1
34 #define LLC_CONN_EV_CONN_RESP 2
35 #define LLC_CONN_EV_DATA_REQ 3
36 #define LLC_CONN_EV_DISC_REQ 4
37 #define LLC_CONN_EV_RESET_REQ 5
38 #define LLC_CONN_EV_RESET_RESP 6
39 #define LLC_CONN_EV_LOCAL_BUSY_DETECTED 7
40 #define LLC_CONN_EV_LOCAL_BUSY_CLEARED 8
41 #define LLC_CONN_EV_RX_BAD_PDU 9
42 #define LLC_CONN_EV_RX_DISC_CMD_Pbit_SET_X 10
43 #define LLC_CONN_EV_RX_DM_RSP_Fbit_SET_X 11
44 #define LLC_CONN_EV_RX_FRMR_RSP_Fbit_SET_X 12
45 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_X 13
46 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_X_UNEXPD_Ns 14
47 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_X_INVAL_Ns 15
48 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_X 16
49 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_X_UNEXPD_Ns 17
50 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_X_INVAL_Ns 18
51 #define LLC_CONN_EV_RX_REJ_CMD_Pbit_SET_X 19
52 #define LLC_CONN_EV_RX_REJ_RSP_Fbit_SET_X 20
53 #define LLC_CONN_EV_RX_RNR_CMD_Pbit_SET_X 21
54 #define LLC_CONN_EV_RX_RNR_RSP_Fbit_SET_X 22
55 #define LLC_CONN_EV_RX_RR_CMD_Pbit_SET_X 23
56 #define LLC_CONN_EV_RX_RR_RSP_Fbit_SET_X 24
57 #define LLC_CONN_EV_RX_SABME_CMD_Pbit_SET_X 25
58 #define LLC_CONN_EV_RX_UA_RSP_Fbit_SET_X 26
59 #define LLC_CONN_EV_RX_XXX_CMD_Pbit_SET_X 27
60 #define LLC_CONN_EV_RX_XXX_RSP_Fbit_SET_X 28
61 #define LLC_CONN_EV_RX_XXX_YYY 29
62 #define LLC_CONN_EV_RX_ZZZ_CMD_Pbit_SET_X_INVAL_Nr 30
63 #define LLC_CONN_EV_RX_ZZZ_RSP_Fbit_SET_X_INVAL_Nr 31
64 #define LLC_CONN_EV_P_TMR_EXP 32
65 #define LLC_CONN_EV_ACK_TMR_EXP 33
66 #define LLC_CONN_EV_REJ_TMR_EXP 34
67 #define LLC_CONN_EV_BUSY_TMR_EXP 35
68 #define LLC_CONN_EV_RX_XXX_CMD_Pbit_SET_1 36
69 #define LLC_CONN_EV_RX_XXX_CMD_Pbit_SET_0 37
70 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_0_UNEXPD_Ns 38
71 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_0_UNEXPD_Ns 39
72 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_1_UNEXPD_Ns 40
73 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_1_UNEXPD_Ns 41
74 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_0 42
75 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_0 43
76 #define LLC_CONN_EV_RX_I_CMD_Pbit_SET_1 44
77 #define LLC_CONN_EV_RX_RR_CMD_Pbit_SET_0 45
78 #define LLC_CONN_EV_RX_RR_RSP_Fbit_SET_0 46
79 #define LLC_CONN_EV_RX_RR_RSP_Fbit_SET_1 47
80 #define LLC_CONN_EV_RX_RR_CMD_Pbit_SET_1 48
81 #define LLC_CONN_EV_RX_RNR_CMD_Pbit_SET_0 49
82 #define LLC_CONN_EV_RX_RNR_RSP_Fbit_SET_0 50
83 #define LLC_CONN_EV_RX_RNR_RSP_Fbit_SET_1 51
84 #define LLC_CONN_EV_RX_RNR_CMD_Pbit_SET_1 52
85 #define LLC_CONN_EV_RX_REJ_CMD_Pbit_SET_0 53
86 #define LLC_CONN_EV_RX_REJ_RSP_Fbit_SET_0 54
87 #define LLC_CONN_EV_RX_REJ_CMD_Pbit_SET_1 55
88 #define LLC_CONN_EV_RX_I_RSP_Fbit_SET_1 56
89 #define LLC_CONN_EV_RX_REJ_RSP_Fbit_SET_1 57
90 #define LLC_CONN_EV_RX_XXX_RSP_Fbit_SET_1 58
91 #define LLC_CONN_EV_TX_BUFF_FULL 59
92 
93 #define LLC_CONN_EV_INIT_P_F_CYCLE 100
94 /*
95  * Connection event qualifiers; for some events a certain combination of
96  * these qualifiers must be TRUE before event recognized valid for state;
97  * these constants act as indexes into the Event Qualifier function
98  * table
99  */
100 #define LLC_CONN_EV_QFY_DATA_FLAG_EQ_1 1
101 #define LLC_CONN_EV_QFY_DATA_FLAG_EQ_0 2
102 #define LLC_CONN_EV_QFY_DATA_FLAG_EQ_2 3
103 #define LLC_CONN_EV_QFY_P_FLAG_EQ_1 4
104 #define LLC_CONN_EV_QFY_P_FLAG_EQ_0 5
105 #define LLC_CONN_EV_QFY_P_FLAG_EQ_Fbit 6
106 #define LLC_CONN_EV_QFY_REMOTE_BUSY_EQ_0 7
107 #define LLC_CONN_EV_QFY_RETRY_CNT_LT_N2 8
108 #define LLC_CONN_EV_QFY_RETRY_CNT_GTE_N2 9
109 #define LLC_CONN_EV_QFY_S_FLAG_EQ_1 10
110 #define LLC_CONN_EV_QFY_S_FLAG_EQ_0 11
111 #define LLC_CONN_EV_QFY_INIT_P_F_CYCLE 12
112 
113 struct llc_conn_state_ev {
114  u8 type;
115  u8 prim;
116  u8 prim_type;
117  u8 reason;
118  u8 status;
119  u8 ind_prim;
120  u8 cfm_prim;
121 };
122 
123 static __inline__ struct llc_conn_state_ev *llc_conn_ev(struct sk_buff *skb)
124 {
125  return (struct llc_conn_state_ev *)skb->cb;
126 }
127 
128 typedef int (*llc_conn_ev_t)(struct sock *sk, struct sk_buff *skb);
129 typedef int (*llc_conn_ev_qfyr_t)(struct sock *sk, struct sk_buff *skb);
130 
131 extern int llc_conn_ev_conn_req(struct sock *sk, struct sk_buff *skb);
132 extern int llc_conn_ev_data_req(struct sock *sk, struct sk_buff *skb);
133 extern int llc_conn_ev_disc_req(struct sock *sk, struct sk_buff *skb);
134 extern int llc_conn_ev_rst_req(struct sock *sk, struct sk_buff *skb);
135 extern int llc_conn_ev_local_busy_detected(struct sock *sk,
136  struct sk_buff *skb);
137 extern int llc_conn_ev_local_busy_cleared(struct sock *sk, struct sk_buff *skb);
138 extern int llc_conn_ev_rx_bad_pdu(struct sock *sk, struct sk_buff *skb);
139 extern int llc_conn_ev_rx_disc_cmd_pbit_set_x(struct sock *sk,
140  struct sk_buff *skb);
141 extern int llc_conn_ev_rx_dm_rsp_fbit_set_x(struct sock *sk,
142  struct sk_buff *skb);
143 extern int llc_conn_ev_rx_frmr_rsp_fbit_set_x(struct sock *sk,
144  struct sk_buff *skb);
145 extern int llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns(struct sock *sk,
146  struct sk_buff *skb);
147 extern int llc_conn_ev_rx_i_rsp_fbit_set_x(struct sock *sk,
148  struct sk_buff *skb);
149 extern int llc_conn_ev_rx_i_rsp_fbit_set_x_unexpd_ns(struct sock *sk,
150  struct sk_buff *skb);
151 extern int llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns(struct sock *sk,
152  struct sk_buff *skb);
153 extern int llc_conn_ev_rx_rej_rsp_fbit_set_x(struct sock *sk,
154  struct sk_buff *skb);
155 extern int llc_conn_ev_rx_sabme_cmd_pbit_set_x(struct sock *sk,
156  struct sk_buff *skb);
157 extern int llc_conn_ev_rx_ua_rsp_fbit_set_x(struct sock *sk,
158  struct sk_buff *skb);
159 extern int llc_conn_ev_rx_xxx_cmd_pbit_set_x(struct sock *sk,
160  struct sk_buff *skb);
161 extern int llc_conn_ev_rx_xxx_rsp_fbit_set_x(struct sock *sk,
162  struct sk_buff *skb);
163 extern int llc_conn_ev_rx_zzz_cmd_pbit_set_x_inval_nr(struct sock *sk,
164  struct sk_buff *skb);
165 extern int llc_conn_ev_rx_zzz_rsp_fbit_set_x_inval_nr(struct sock *sk,
166  struct sk_buff *skb);
167 extern int llc_conn_ev_p_tmr_exp(struct sock *sk, struct sk_buff *skb);
168 extern int llc_conn_ev_ack_tmr_exp(struct sock *sk, struct sk_buff *skb);
169 extern int llc_conn_ev_rej_tmr_exp(struct sock *sk, struct sk_buff *skb);
170 extern int llc_conn_ev_busy_tmr_exp(struct sock *sk, struct sk_buff *skb);
171 extern int llc_conn_ev_sendack_tmr_exp(struct sock *sk, struct sk_buff *skb);
172 /* NOT_USED functions and their variations */
173 extern int llc_conn_ev_rx_xxx_cmd_pbit_set_1(struct sock *sk,
174  struct sk_buff *skb);
175 extern int llc_conn_ev_rx_xxx_rsp_fbit_set_1(struct sock *sk,
176  struct sk_buff *skb);
177 extern int llc_conn_ev_rx_i_cmd_pbit_set_0_unexpd_ns(struct sock *sk,
178  struct sk_buff *skb);
179 extern int llc_conn_ev_rx_i_cmd_pbit_set_1_unexpd_ns(struct sock *sk,
180  struct sk_buff *skb);
181 extern int llc_conn_ev_rx_i_cmd_pbit_set_0(struct sock *sk,
182  struct sk_buff *skb);
183 extern int llc_conn_ev_rx_i_cmd_pbit_set_1(struct sock *sk,
184  struct sk_buff *skb);
185 extern int llc_conn_ev_rx_i_rsp_fbit_set_0_unexpd_ns(struct sock *sk,
186  struct sk_buff *skb);
187 extern int llc_conn_ev_rx_i_rsp_fbit_set_1_unexpd_ns(struct sock *sk,
188  struct sk_buff *skb);
189 extern int llc_conn_ev_rx_i_rsp_fbit_set_0(struct sock *sk,
190  struct sk_buff *skb);
191 extern int llc_conn_ev_rx_i_rsp_fbit_set_1(struct sock *sk,
192  struct sk_buff *skb);
193 extern int llc_conn_ev_rx_rr_cmd_pbit_set_0(struct sock *sk,
194  struct sk_buff *skb);
195 extern int llc_conn_ev_rx_rr_cmd_pbit_set_1(struct sock *sk,
196  struct sk_buff *skb);
197 extern int llc_conn_ev_rx_rr_rsp_fbit_set_0(struct sock *sk,
198  struct sk_buff *skb);
199 extern int llc_conn_ev_rx_rr_rsp_fbit_set_1(struct sock *sk,
200  struct sk_buff *skb);
201 extern int llc_conn_ev_rx_rnr_cmd_pbit_set_0(struct sock *sk,
202  struct sk_buff *skb);
203 extern int llc_conn_ev_rx_rnr_cmd_pbit_set_1(struct sock *sk,
204  struct sk_buff *skb);
205 extern int llc_conn_ev_rx_rnr_rsp_fbit_set_0(struct sock *sk,
206  struct sk_buff *skb);
207 extern int llc_conn_ev_rx_rnr_rsp_fbit_set_1(struct sock *sk,
208  struct sk_buff *skb);
209 extern int llc_conn_ev_rx_rej_cmd_pbit_set_0(struct sock *sk,
210  struct sk_buff *skb);
211 extern int llc_conn_ev_rx_rej_cmd_pbit_set_1(struct sock *sk,
212  struct sk_buff *skb);
213 extern int llc_conn_ev_rx_rej_rsp_fbit_set_0(struct sock *sk,
214  struct sk_buff *skb);
215 extern int llc_conn_ev_rx_rej_rsp_fbit_set_1(struct sock *sk,
216  struct sk_buff *skb);
217 extern int llc_conn_ev_rx_any_frame(struct sock *sk, struct sk_buff *skb);
218 extern int llc_conn_ev_tx_buffer_full(struct sock *sk, struct sk_buff *skb);
219 extern int llc_conn_ev_init_p_f_cycle(struct sock *sk, struct sk_buff *skb);
220 
221 /* Available connection action qualifiers */
222 extern int llc_conn_ev_qlfy_data_flag_eq_1(struct sock *sk,
223  struct sk_buff *skb);
224 extern int llc_conn_ev_qlfy_data_flag_eq_0(struct sock *sk,
225  struct sk_buff *skb);
226 extern int llc_conn_ev_qlfy_data_flag_eq_2(struct sock *sk,
227  struct sk_buff *skb);
228 extern int llc_conn_ev_qlfy_p_flag_eq_1(struct sock *sk, struct sk_buff *skb);
229 extern int llc_conn_ev_qlfy_last_frame_eq_1(struct sock *sk,
230  struct sk_buff *skb);
231 extern int llc_conn_ev_qlfy_last_frame_eq_0(struct sock *sk,
232  struct sk_buff *skb);
233 extern int llc_conn_ev_qlfy_p_flag_eq_0(struct sock *sk, struct sk_buff *skb);
234 extern int llc_conn_ev_qlfy_p_flag_eq_f(struct sock *sk, struct sk_buff *skb);
235 extern int llc_conn_ev_qlfy_remote_busy_eq_0(struct sock *sk,
236  struct sk_buff *skb);
237 extern int llc_conn_ev_qlfy_remote_busy_eq_1(struct sock *sk,
238  struct sk_buff *skb);
239 extern int llc_conn_ev_qlfy_retry_cnt_lt_n2(struct sock *sk,
240  struct sk_buff *skb);
241 extern int llc_conn_ev_qlfy_retry_cnt_gte_n2(struct sock *sk,
242  struct sk_buff *skb);
243 extern int llc_conn_ev_qlfy_s_flag_eq_1(struct sock *sk, struct sk_buff *skb);
244 extern int llc_conn_ev_qlfy_s_flag_eq_0(struct sock *sk, struct sk_buff *skb);
245 extern int llc_conn_ev_qlfy_cause_flag_eq_1(struct sock *sk,
246  struct sk_buff *skb);
247 extern int llc_conn_ev_qlfy_cause_flag_eq_0(struct sock *sk,
248  struct sk_buff *skb);
249 extern int llc_conn_ev_qlfy_set_status_conn(struct sock *sk,
250  struct sk_buff *skb);
251 extern int llc_conn_ev_qlfy_set_status_disc(struct sock *sk,
252  struct sk_buff *skb);
253 extern int llc_conn_ev_qlfy_set_status_failed(struct sock *sk,
254  struct sk_buff *skb);
255 extern int llc_conn_ev_qlfy_set_status_remote_busy(struct sock *sk,
256  struct sk_buff *skb);
257 extern int llc_conn_ev_qlfy_set_status_refuse(struct sock *sk,
258  struct sk_buff *skb);
259 extern int llc_conn_ev_qlfy_set_status_conflict(struct sock *sk,
260  struct sk_buff *skb);
261 extern int llc_conn_ev_qlfy_set_status_rst_done(struct sock *sk,
262  struct sk_buff *skb);
263 
264 static __inline__ int llc_conn_space(struct sock *sk, struct sk_buff *skb)
265 {
266  return atomic_read(&sk->sk_rmem_alloc) + skb->truesize <
267  (unsigned int)sk->sk_rcvbuf;
268 }
269 #endif /* LLC_C_EV_H */
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