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 <acme@conectiva.com.br>
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 
llc_conn_ev(struct sk_buff * skb)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 int llc_conn_ev_conn_req(struct sock *sk, struct sk_buff *skb);
132 int llc_conn_ev_data_req(struct sock *sk, struct sk_buff *skb);
133 int llc_conn_ev_disc_req(struct sock *sk, struct sk_buff *skb);
134 int llc_conn_ev_rst_req(struct sock *sk, struct sk_buff *skb);
135 int llc_conn_ev_local_busy_detected(struct sock *sk, struct sk_buff *skb);
136 int llc_conn_ev_local_busy_cleared(struct sock *sk, struct sk_buff *skb);
137 int llc_conn_ev_rx_bad_pdu(struct sock *sk, struct sk_buff *skb);
138 int llc_conn_ev_rx_disc_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb);
139 int llc_conn_ev_rx_dm_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
140 int llc_conn_ev_rx_frmr_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
141 int llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns(struct sock *sk,
142 					     struct sk_buff *skb);
143 int llc_conn_ev_rx_i_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
144 int llc_conn_ev_rx_i_rsp_fbit_set_x_unexpd_ns(struct sock *sk,
145 					      struct sk_buff *skb);
146 int llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns(struct sock *sk,
147 					     struct sk_buff *skb);
148 int llc_conn_ev_rx_rej_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
149 int llc_conn_ev_rx_sabme_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb);
150 int llc_conn_ev_rx_ua_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
151 int llc_conn_ev_rx_xxx_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb);
152 int llc_conn_ev_rx_xxx_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb);
153 int llc_conn_ev_rx_zzz_cmd_pbit_set_x_inval_nr(struct sock *sk,
154 					       struct sk_buff *skb);
155 int llc_conn_ev_rx_zzz_rsp_fbit_set_x_inval_nr(struct sock *sk,
156 					       struct sk_buff *skb);
157 int llc_conn_ev_p_tmr_exp(struct sock *sk, struct sk_buff *skb);
158 int llc_conn_ev_ack_tmr_exp(struct sock *sk, struct sk_buff *skb);
159 int llc_conn_ev_rej_tmr_exp(struct sock *sk, struct sk_buff *skb);
160 int llc_conn_ev_busy_tmr_exp(struct sock *sk, struct sk_buff *skb);
161 int llc_conn_ev_sendack_tmr_exp(struct sock *sk, struct sk_buff *skb);
162 /* NOT_USED functions and their variations */
163 int llc_conn_ev_rx_xxx_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
164 int llc_conn_ev_rx_xxx_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);
165 int llc_conn_ev_rx_i_cmd_pbit_set_0_unexpd_ns(struct sock *sk,
166 					      struct sk_buff *skb);
167 int llc_conn_ev_rx_i_cmd_pbit_set_1_unexpd_ns(struct sock *sk,
168 					      struct sk_buff *skb);
169 int llc_conn_ev_rx_i_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb);
170 int llc_conn_ev_rx_i_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
171 int llc_conn_ev_rx_i_rsp_fbit_set_0_unexpd_ns(struct sock *sk,
172 					      struct sk_buff *skb);
173 int llc_conn_ev_rx_i_rsp_fbit_set_1_unexpd_ns(struct sock *sk,
174 					      struct sk_buff *skb);
175 int llc_conn_ev_rx_i_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb);
176 int llc_conn_ev_rx_i_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);
177 int llc_conn_ev_rx_rr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb);
178 int llc_conn_ev_rx_rr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
179 int llc_conn_ev_rx_rr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb);
180 int llc_conn_ev_rx_rr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);
181 int llc_conn_ev_rx_rnr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb);
182 int llc_conn_ev_rx_rnr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
183 int llc_conn_ev_rx_rnr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb);
184 int llc_conn_ev_rx_rnr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);
185 int llc_conn_ev_rx_rej_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb);
186 int llc_conn_ev_rx_rej_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
187 int llc_conn_ev_rx_rej_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb);
188 int llc_conn_ev_rx_rej_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);
189 int llc_conn_ev_rx_any_frame(struct sock *sk, struct sk_buff *skb);
190 int llc_conn_ev_tx_buffer_full(struct sock *sk, struct sk_buff *skb);
191 int llc_conn_ev_init_p_f_cycle(struct sock *sk, struct sk_buff *skb);
192 
193 /* Available connection action qualifiers */
194 int llc_conn_ev_qlfy_data_flag_eq_1(struct sock *sk, struct sk_buff *skb);
195 int llc_conn_ev_qlfy_data_flag_eq_0(struct sock *sk, struct sk_buff *skb);
196 int llc_conn_ev_qlfy_data_flag_eq_2(struct sock *sk, struct sk_buff *skb);
197 int llc_conn_ev_qlfy_p_flag_eq_1(struct sock *sk, struct sk_buff *skb);
198 int llc_conn_ev_qlfy_last_frame_eq_1(struct sock *sk, struct sk_buff *skb);
199 int llc_conn_ev_qlfy_last_frame_eq_0(struct sock *sk, struct sk_buff *skb);
200 int llc_conn_ev_qlfy_p_flag_eq_0(struct sock *sk, struct sk_buff *skb);
201 int llc_conn_ev_qlfy_p_flag_eq_f(struct sock *sk, struct sk_buff *skb);
202 int llc_conn_ev_qlfy_remote_busy_eq_0(struct sock *sk, struct sk_buff *skb);
203 int llc_conn_ev_qlfy_remote_busy_eq_1(struct sock *sk, struct sk_buff *skb);
204 int llc_conn_ev_qlfy_retry_cnt_lt_n2(struct sock *sk, struct sk_buff *skb);
205 int llc_conn_ev_qlfy_retry_cnt_gte_n2(struct sock *sk, struct sk_buff *skb);
206 int llc_conn_ev_qlfy_s_flag_eq_1(struct sock *sk, struct sk_buff *skb);
207 int llc_conn_ev_qlfy_s_flag_eq_0(struct sock *sk, struct sk_buff *skb);
208 int llc_conn_ev_qlfy_cause_flag_eq_1(struct sock *sk, struct sk_buff *skb);
209 int llc_conn_ev_qlfy_cause_flag_eq_0(struct sock *sk, struct sk_buff *skb);
210 int llc_conn_ev_qlfy_set_status_conn(struct sock *sk, struct sk_buff *skb);
211 int llc_conn_ev_qlfy_set_status_disc(struct sock *sk, struct sk_buff *skb);
212 int llc_conn_ev_qlfy_set_status_failed(struct sock *sk, struct sk_buff *skb);
213 int llc_conn_ev_qlfy_set_status_remote_busy(struct sock *sk,
214 					    struct sk_buff *skb);
215 int llc_conn_ev_qlfy_set_status_refuse(struct sock *sk, struct sk_buff *skb);
216 int llc_conn_ev_qlfy_set_status_conflict(struct sock *sk, struct sk_buff *skb);
217 int llc_conn_ev_qlfy_set_status_rst_done(struct sock *sk, struct sk_buff *skb);
218 
llc_conn_space(struct sock * sk,struct sk_buff * skb)219 static __inline__ int llc_conn_space(struct sock *sk, struct sk_buff *skb)
220 {
221 	return atomic_read(&sk->sk_rmem_alloc) + skb->truesize <
222 	       (unsigned int)sk->sk_rcvbuf;
223 }
224 #endif /* LLC_C_EV_H */
225