2 * Declarations of X.25 Packet Layer type objects.
5 * nov/17/96 Jonathan Naylor Initial version.
6 * mar/20/00 Daniela Squassoni Disabling/enabling of facilities
12 #include <linux/x25.h>
13 #include <linux/slab.h>
16 #define X25_ADDR_LEN 16
18 #define X25_MAX_L2_LEN 18 /* 802.2 LLC */
20 #define X25_STD_MIN_LEN 3
21 #define X25_EXT_MIN_LEN 4
23 #define X25_GFI_SEQ_MASK 0x30
24 #define X25_GFI_STDSEQ 0x10
25 #define X25_GFI_EXTSEQ 0x20
27 #define X25_Q_BIT 0x80
28 #define X25_D_BIT 0x40
29 #define X25_STD_M_BIT 0x10
30 #define X25_EXT_M_BIT 0x01
32 #define X25_CALL_REQUEST 0x0B
33 #define X25_CALL_ACCEPTED 0x0F
34 #define X25_CLEAR_REQUEST 0x13
35 #define X25_CLEAR_CONFIRMATION 0x17
37 #define X25_INTERRUPT 0x23
38 #define X25_INTERRUPT_CONFIRMATION 0x27
42 #define X25_RESET_REQUEST 0x1B
43 #define X25_RESET_CONFIRMATION 0x1F
44 #define X25_REGISTRATION_REQUEST 0xF3
45 #define X25_REGISTRATION_CONFIRMATION 0xF7
46 #define X25_RESTART_REQUEST 0xFB
47 #define X25_RESTART_CONFIRMATION 0xFF
48 #define X25_DIAGNOSTIC 0xF1
49 #define X25_ILLEGAL 0xFD
51 /* Define the various conditions that may exist */
53 #define X25_COND_ACK_PENDING 0x01
54 #define X25_COND_OWN_RX_BUSY 0x02
55 #define X25_COND_PEER_RX_BUSY 0x04
57 /* Define Link State constants. */
59 X25_STATE_0, /* Ready */
60 X25_STATE_1, /* Awaiting Call Accepted */
61 X25_STATE_2, /* Awaiting Clear Confirmation */
62 X25_STATE_3, /* Data Transfer */
63 X25_STATE_4 /* Awaiting Reset Confirmation */
73 #define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */
74 #define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */
75 #define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */
76 #define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */
77 #define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */
79 #define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */
80 #define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */
81 #define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */
82 #define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */
83 #define X25_DENY_ACCPT_APPRV 0x01 /* Default value */
84 #define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */
86 #define X25_SMODULUS 8
87 #define X25_EMODULUS 128
90 * X.25 Facilities constants.
93 #define X25_FAC_CLASS_MASK 0xC0
95 #define X25_FAC_CLASS_A 0x00
96 #define X25_FAC_CLASS_B 0x40
97 #define X25_FAC_CLASS_C 0x80
98 #define X25_FAC_CLASS_D 0xC0
100 #define X25_FAC_REVERSE 0x01 /* also fast select */
101 #define X25_FAC_THROUGHPUT 0x02
102 #define X25_FAC_PACKET_SIZE 0x42
103 #define X25_FAC_WINDOW_SIZE 0x43
105 #define X25_MAX_FAC_LEN 60
106 #define X25_MAX_CUD_LEN 128
108 #define X25_FAC_CALLING_AE 0xCB
109 #define X25_FAC_CALLED_AE 0xC9
111 #define X25_MARKER 0x00
112 #define X25_DTE_SERVICES 0x0F
113 #define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */
114 #define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */
117 * struct x25_route - x25 routing entry
118 * @node - entry in x25_list_lock
119 * @address - Start of address range
120 * @sigdigits - Number of sig digits
121 * @dev - More than one for MLP
122 * @refcnt - reference counter
125 struct list_head node;
126 struct x25_address address;
127 unsigned int sigdigits;
128 struct net_device *dev;
133 struct list_head node;
134 struct net_device *dev;
136 unsigned int extended;
137 struct sk_buff_head queue;
139 struct timer_list t20timer;
140 unsigned long global_facil_mask;
146 struct x25_address source_addr, dest_addr;
147 struct x25_neigh *neighbour;
148 unsigned int lci, cudmatchlength;
149 unsigned char state, condition, qbitincl, intflag, accptapprv;
150 unsigned short vs, vr, va, vl;
151 unsigned long t2, t21, t22, t23;
152 unsigned short fraglen;
153 struct sk_buff_head ack_queue;
154 struct sk_buff_head fragment_queue;
155 struct sk_buff_head interrupt_in_queue;
156 struct sk_buff_head interrupt_out_queue;
157 struct timer_list timer;
158 struct x25_causediag causediag;
159 struct x25_facilities facilities;
160 struct x25_dte_facilities dte_facilities;
161 struct x25_calluserdata calluserdata;
162 unsigned long vc_facil_mask; /* inc_call facilities mask */
166 struct list_head node;
168 struct net_device *dev1;
169 struct net_device *dev2;
173 static inline struct x25_sock *x25_sk(const struct sock *sk)
175 return (struct x25_sock *)sk;
179 extern int sysctl_x25_restart_request_timeout;
180 extern int sysctl_x25_call_request_timeout;
181 extern int sysctl_x25_reset_request_timeout;
182 extern int sysctl_x25_clear_request_timeout;
183 extern int sysctl_x25_ack_holdback_timeout;
184 extern int sysctl_x25_forward;
186 extern int x25_parse_address_block(struct sk_buff *skb,
187 struct x25_address *called_addr,
188 struct x25_address *calling_addr);
190 extern int x25_addr_ntoa(unsigned char *, struct x25_address *,
191 struct x25_address *);
192 extern int x25_addr_aton(unsigned char *, struct x25_address *,
193 struct x25_address *);
194 extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
195 extern void x25_destroy_socket_from_timer(struct sock *);
196 extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
197 extern void x25_kill_by_neigh(struct x25_neigh *);
200 extern void x25_send_frame(struct sk_buff *, struct x25_neigh *);
201 extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
202 extern void x25_establish_link(struct x25_neigh *);
203 extern void x25_terminate_link(struct x25_neigh *);
205 /* x25_facilities.c */
206 extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *,
207 struct x25_dte_facilities *, unsigned long *);
208 extern int x25_create_facilities(unsigned char *, struct x25_facilities *,
209 struct x25_dte_facilities *, unsigned long);
210 extern int x25_negotiate_facilities(struct sk_buff *, struct sock *,
211 struct x25_facilities *,
212 struct x25_dte_facilities *);
213 extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
216 extern void x25_clear_forward_by_lci(unsigned int lci);
217 extern void x25_clear_forward_by_dev(struct net_device *);
218 extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *);
219 extern int x25_forward_call(struct x25_address *, struct x25_neigh *,
220 struct sk_buff *, int);
223 extern int x25_process_rx_frame(struct sock *, struct sk_buff *);
224 extern int x25_backlog_rcv(struct sock *, struct sk_buff *);
227 extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
228 extern void x25_link_device_up(struct net_device *);
229 extern void x25_link_device_down(struct net_device *);
230 extern void x25_link_established(struct x25_neigh *);
231 extern void x25_link_terminated(struct x25_neigh *);
232 extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char);
233 extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
234 extern int x25_subscr_ioctl(unsigned int, void __user *);
235 extern struct x25_neigh *x25_get_neigh(struct net_device *);
236 extern void x25_link_free(void);
239 static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
241 atomic_inc(&nb->refcnt);
244 static __inline__ void x25_neigh_put(struct x25_neigh *nb)
246 if (atomic_dec_and_test(&nb->refcnt))
251 extern int x25_output(struct sock *, struct sk_buff *);
252 extern void x25_kick(struct sock *);
253 extern void x25_enquiry_response(struct sock *);
256 extern struct x25_route *x25_get_route(struct x25_address *addr);
257 extern struct net_device *x25_dev_get(char *);
258 extern void x25_route_device_down(struct net_device *dev);
259 extern int x25_route_ioctl(unsigned int, void __user *);
260 extern void x25_route_free(void);
262 static __inline__ void x25_route_hold(struct x25_route *rt)
264 atomic_inc(&rt->refcnt);
267 static __inline__ void x25_route_put(struct x25_route *rt)
269 if (atomic_dec_and_test(&rt->refcnt))
274 extern void x25_clear_queues(struct sock *);
275 extern void x25_frames_acked(struct sock *, unsigned short);
276 extern void x25_requeue_frames(struct sock *);
277 extern int x25_validate_nr(struct sock *, unsigned short);
278 extern void x25_write_internal(struct sock *, int);
279 extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *);
280 extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
283 extern void x25_init_timers(struct sock *sk);
284 extern void x25_start_heartbeat(struct sock *);
285 extern void x25_start_t2timer(struct sock *);
286 extern void x25_start_t21timer(struct sock *);
287 extern void x25_start_t22timer(struct sock *);
288 extern void x25_start_t23timer(struct sock *);
289 extern void x25_stop_heartbeat(struct sock *);
290 extern void x25_stop_timer(struct sock *);
291 extern unsigned long x25_display_timer(struct sock *);
292 extern void x25_check_rbuf(struct sock *);
294 /* sysctl_net_x25.c */
296 extern void x25_register_sysctl(void);
297 extern void x25_unregister_sysctl(void);
299 static inline void x25_register_sysctl(void) {};
300 static inline void x25_unregister_sysctl(void) {};
301 #endif /* CONFIG_SYSCTL */
306 #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
308 extern struct hlist_head x25_list;
309 extern rwlock_t x25_list_lock;
310 extern struct list_head x25_route_list;
311 extern rwlock_t x25_route_list_lock;
312 extern struct list_head x25_forward_list;
313 extern rwlock_t x25_forward_list_lock;
315 extern int x25_proc_init(void);
316 extern void x25_proc_exit(void);