1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *	Declarations of Rose type objects.
4  *
5  *	Jonathan Naylor G4KLX	25/8/96
6  */
7 
8 #ifndef _ROSE_H
9 #define _ROSE_H
10 
11 #include <linux/rose.h>
12 #include <net/sock.h>
13 
14 #define	ROSE_ADDR_LEN			5
15 
16 #define	ROSE_MIN_LEN			3
17 
18 #define	ROSE_CALL_REQ_ADDR_LEN_OFF	3
19 #define	ROSE_CALL_REQ_ADDR_LEN_VAL	0xAA	/* each address is 10 digits */
20 #define	ROSE_CALL_REQ_DEST_ADDR_OFF	4
21 #define	ROSE_CALL_REQ_SRC_ADDR_OFF	9
22 #define	ROSE_CALL_REQ_FACILITIES_OFF	14
23 
24 #define	ROSE_GFI			0x10
25 #define	ROSE_Q_BIT			0x80
26 #define	ROSE_D_BIT			0x40
27 #define	ROSE_M_BIT			0x10
28 
29 #define	ROSE_CALL_REQUEST		0x0B
30 #define	ROSE_CALL_ACCEPTED		0x0F
31 #define	ROSE_CLEAR_REQUEST		0x13
32 #define	ROSE_CLEAR_CONFIRMATION		0x17
33 #define	ROSE_DATA			0x00
34 #define	ROSE_INTERRUPT			0x23
35 #define	ROSE_INTERRUPT_CONFIRMATION	0x27
36 #define	ROSE_RR				0x01
37 #define	ROSE_RNR			0x05
38 #define	ROSE_REJ			0x09
39 #define	ROSE_RESET_REQUEST		0x1B
40 #define	ROSE_RESET_CONFIRMATION		0x1F
41 #define	ROSE_REGISTRATION_REQUEST	0xF3
42 #define	ROSE_REGISTRATION_CONFIRMATION	0xF7
43 #define	ROSE_RESTART_REQUEST		0xFB
44 #define	ROSE_RESTART_CONFIRMATION	0xFF
45 #define	ROSE_DIAGNOSTIC			0xF1
46 #define	ROSE_ILLEGAL			0xFD
47 
48 /* Define Link State constants. */
49 
50 enum {
51 	ROSE_STATE_0,			/* Ready */
52 	ROSE_STATE_1,			/* Awaiting Call Accepted */
53 	ROSE_STATE_2,			/* Awaiting Clear Confirmation */
54 	ROSE_STATE_3,			/* Data Transfer */
55 	ROSE_STATE_4,			/* Awaiting Reset Confirmation */
56 	ROSE_STATE_5			/* Deferred Call Acceptance */
57 };
58 
59 #define ROSE_DEFAULT_T0			180000		/* Default T10 T20 value */
60 #define ROSE_DEFAULT_T1			200000		/* Default T11 T21 value */
61 #define ROSE_DEFAULT_T2			180000		/* Default T12 T22 value */
62 #define	ROSE_DEFAULT_T3			180000		/* Default T13 T23 value */
63 #define	ROSE_DEFAULT_HB			5000		/* Default Holdback value */
64 #define	ROSE_DEFAULT_IDLE		0		/* No Activity Timeout - none */
65 #define	ROSE_DEFAULT_ROUTING		1		/* Default routing flag */
66 #define	ROSE_DEFAULT_FAIL_TIMEOUT	120000		/* Time until link considered usable */
67 #define	ROSE_DEFAULT_MAXVC		50		/* Maximum number of VCs per neighbour */
68 #define	ROSE_DEFAULT_WINDOW_SIZE	7		/* Default window size */
69 
70 #define ROSE_MODULUS 			8
71 #define	ROSE_MAX_PACKET_SIZE		251		/* Maximum packet size */
72 
73 #define	ROSE_COND_ACK_PENDING		0x01
74 #define	ROSE_COND_PEER_RX_BUSY		0x02
75 #define	ROSE_COND_OWN_RX_BUSY		0x04
76 
77 #define	FAC_NATIONAL			0x00
78 #define	FAC_CCITT			0x0F
79 
80 #define	FAC_NATIONAL_RAND		0x7F
81 #define	FAC_NATIONAL_FLAGS		0x3F
82 #define	FAC_NATIONAL_DEST_DIGI		0xE9
83 #define	FAC_NATIONAL_SRC_DIGI		0xEB
84 #define	FAC_NATIONAL_FAIL_CALL		0xED
85 #define	FAC_NATIONAL_FAIL_ADD		0xEE
86 #define	FAC_NATIONAL_DIGIS			0xEF
87 
88 #define	FAC_CCITT_DEST_NSAP		0xC9
89 #define	FAC_CCITT_SRC_NSAP		0xCB
90 
91 struct rose_neigh {
92 	struct rose_neigh	*next;
93 	ax25_address		callsign;
94 	ax25_digi		*digipeat;
95 	ax25_cb			*ax25;
96 	struct net_device		*dev;
97 	unsigned short		count;
98 	unsigned short		use;
99 	unsigned int		number;
100 	char			restarted;
101 	char			dce_mode;
102 	char			loopback;
103 	struct sk_buff_head	queue;
104 	struct timer_list	t0timer;
105 	struct timer_list	ftimer;
106 };
107 
108 struct rose_node {
109 	struct rose_node	*next;
110 	rose_address		address;
111 	unsigned short		mask;
112 	unsigned char		count;
113 	char			loopback;
114 	struct rose_neigh	*neighbour[3];
115 };
116 
117 struct rose_route {
118 	struct rose_route	*next;
119 	unsigned int		lci1, lci2;
120 	rose_address		src_addr, dest_addr;
121 	ax25_address		src_call, dest_call;
122 	struct rose_neigh 	*neigh1, *neigh2;
123 	unsigned int		rand;
124 };
125 
126 struct rose_sock {
127 	struct sock		sock;
128 	rose_address		source_addr,   dest_addr;
129 	ax25_address		source_call,   dest_call;
130 	unsigned char		source_ndigis, dest_ndigis;
131 	ax25_address		source_digis[ROSE_MAX_DIGIS];
132 	ax25_address		dest_digis[ROSE_MAX_DIGIS];
133 	struct rose_neigh	*neighbour;
134 	struct net_device		*device;
135 	unsigned int		lci, rand;
136 	unsigned char		state, condition, qbitincl, defer;
137 	unsigned char		cause, diagnostic;
138 	unsigned short		vs, vr, va, vl;
139 	unsigned long		t1, t2, t3, hb, idle;
140 #ifdef M_BIT
141 	unsigned short		fraglen;
142 	struct sk_buff_head	frag_queue;
143 #endif
144 	struct sk_buff_head	ack_queue;
145 	struct rose_facilities_struct facilities;
146 	struct timer_list	timer;
147 	struct timer_list	idletimer;
148 };
149 
150 #define rose_sk(sk) ((struct rose_sock *)(sk))
151 
152 /* af_rose.c */
153 extern ax25_address rose_callsign;
154 extern int  sysctl_rose_restart_request_timeout;
155 extern int  sysctl_rose_call_request_timeout;
156 extern int  sysctl_rose_reset_request_timeout;
157 extern int  sysctl_rose_clear_request_timeout;
158 extern int  sysctl_rose_no_activity_timeout;
159 extern int  sysctl_rose_ack_hold_back_timeout;
160 extern int  sysctl_rose_routing_control;
161 extern int  sysctl_rose_link_fail_timeout;
162 extern int  sysctl_rose_maximum_vcs;
163 extern int  sysctl_rose_window_size;
164 
165 int rosecmp(rose_address *, rose_address *);
166 int rosecmpm(rose_address *, rose_address *, unsigned short);
167 char *rose2asc(char *buf, const rose_address *);
168 struct sock *rose_find_socket(unsigned int, struct rose_neigh *);
169 void rose_kill_by_neigh(struct rose_neigh *);
170 unsigned int rose_new_lci(struct rose_neigh *);
171 int rose_rx_call_request(struct sk_buff *, struct net_device *,
172 			 struct rose_neigh *, unsigned int);
173 void rose_destroy_socket(struct sock *);
174 
175 /* rose_dev.c */
176 void rose_setup(struct net_device *);
177 
178 /* rose_in.c */
179 int rose_process_rx_frame(struct sock *, struct sk_buff *);
180 
181 /* rose_link.c */
182 void rose_start_ftimer(struct rose_neigh *);
183 void rose_stop_ftimer(struct rose_neigh *);
184 void rose_stop_t0timer(struct rose_neigh *);
185 int rose_ftimer_running(struct rose_neigh *);
186 void rose_link_rx_restart(struct sk_buff *, struct rose_neigh *,
187 			  unsigned short);
188 void rose_transmit_clear_request(struct rose_neigh *, unsigned int,
189 				 unsigned char, unsigned char);
190 void rose_transmit_link(struct sk_buff *, struct rose_neigh *);
191 
192 /* rose_loopback.c */
193 void rose_loopback_init(void);
194 void rose_loopback_clear(void);
195 int rose_loopback_queue(struct sk_buff *, struct rose_neigh *);
196 
197 /* rose_out.c */
198 void rose_kick(struct sock *);
199 void rose_enquiry_response(struct sock *);
200 
201 /* rose_route.c */
202 extern struct rose_neigh *rose_loopback_neigh;
203 extern const struct seq_operations rose_neigh_seqops;
204 extern const struct seq_operations rose_node_seqops;
205 extern struct seq_operations rose_route_seqops;
206 
207 void rose_add_loopback_neigh(void);
208 int __must_check rose_add_loopback_node(rose_address *);
209 void rose_del_loopback_node(rose_address *);
210 void rose_rt_device_down(struct net_device *);
211 void rose_link_device_down(struct net_device *);
212 struct net_device *rose_dev_first(void);
213 struct net_device *rose_dev_get(rose_address *);
214 struct rose_route *rose_route_free_lci(unsigned int, struct rose_neigh *);
215 struct rose_neigh *rose_get_neigh(rose_address *, unsigned char *,
216 				  unsigned char *, int);
217 int rose_rt_ioctl(unsigned int, void __user *);
218 void rose_link_failed(ax25_cb *, int);
219 int rose_route_frame(struct sk_buff *, ax25_cb *);
220 void rose_rt_free(void);
221 
222 /* rose_subr.c */
223 void rose_clear_queues(struct sock *);
224 void rose_frames_acked(struct sock *, unsigned short);
225 void rose_requeue_frames(struct sock *);
226 int rose_validate_nr(struct sock *, unsigned short);
227 void rose_write_internal(struct sock *, int);
228 int rose_decode(struct sk_buff *, int *, int *, int *, int *, int *);
229 int rose_parse_facilities(unsigned char *, unsigned int,
230 			  struct rose_facilities_struct *);
231 void rose_disconnect(struct sock *, int, int, int);
232 
233 /* rose_timer.c */
234 void rose_start_heartbeat(struct sock *);
235 void rose_start_t1timer(struct sock *);
236 void rose_start_t2timer(struct sock *);
237 void rose_start_t3timer(struct sock *);
238 void rose_start_hbtimer(struct sock *);
239 void rose_start_idletimer(struct sock *);
240 void rose_stop_heartbeat(struct sock *);
241 void rose_stop_timer(struct sock *);
242 void rose_stop_idletimer(struct sock *);
243 
244 /* sysctl_net_rose.c */
245 void rose_register_sysctl(void);
246 void rose_unregister_sysctl(void);
247 
248 #endif
249