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>
14 #include <linux/refcount.h>
17 #define X25_ADDR_LEN 16
19 #define X25_MAX_L2_LEN 18 /* 802.2 LLC */
21 #define X25_STD_MIN_LEN 3
22 #define X25_EXT_MIN_LEN 4
24 #define X25_GFI_SEQ_MASK 0x30
25 #define X25_GFI_STDSEQ 0x10
26 #define X25_GFI_EXTSEQ 0x20
28 #define X25_Q_BIT 0x80
29 #define X25_D_BIT 0x40
30 #define X25_STD_M_BIT 0x10
31 #define X25_EXT_M_BIT 0x01
33 #define X25_CALL_REQUEST 0x0B
34 #define X25_CALL_ACCEPTED 0x0F
35 #define X25_CLEAR_REQUEST 0x13
36 #define X25_CLEAR_CONFIRMATION 0x17
38 #define X25_INTERRUPT 0x23
39 #define X25_INTERRUPT_CONFIRMATION 0x27
43 #define X25_RESET_REQUEST 0x1B
44 #define X25_RESET_CONFIRMATION 0x1F
45 #define X25_REGISTRATION_REQUEST 0xF3
46 #define X25_REGISTRATION_CONFIRMATION 0xF7
47 #define X25_RESTART_REQUEST 0xFB
48 #define X25_RESTART_CONFIRMATION 0xFF
49 #define X25_DIAGNOSTIC 0xF1
50 #define X25_ILLEGAL 0xFD
52 /* Define the various conditions that may exist */
54 #define X25_COND_ACK_PENDING 0x01
55 #define X25_COND_OWN_RX_BUSY 0x02
56 #define X25_COND_PEER_RX_BUSY 0x04
58 /* Define Link State constants. */
60 X25_STATE_0
, /* Ready */
61 X25_STATE_1
, /* Awaiting Call Accepted */
62 X25_STATE_2
, /* Awaiting Clear Confirmation */
63 X25_STATE_3
, /* Data Transfer */
64 X25_STATE_4
/* Awaiting Reset Confirmation */
74 #define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */
75 #define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */
76 #define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */
77 #define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */
78 #define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */
80 #define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */
81 #define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */
82 #define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */
83 #define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */
85 #define X25_SMODULUS 8
86 #define X25_EMODULUS 128
89 * X.25 Facilities constants.
92 #define X25_FAC_CLASS_MASK 0xC0
94 #define X25_FAC_CLASS_A 0x00
95 #define X25_FAC_CLASS_B 0x40
96 #define X25_FAC_CLASS_C 0x80
97 #define X25_FAC_CLASS_D 0xC0
99 #define X25_FAC_REVERSE 0x01 /* also fast select */
100 #define X25_FAC_THROUGHPUT 0x02
101 #define X25_FAC_PACKET_SIZE 0x42
102 #define X25_FAC_WINDOW_SIZE 0x43
104 #define X25_MAX_FAC_LEN 60
105 #define X25_MAX_CUD_LEN 128
107 #define X25_FAC_CALLING_AE 0xCB
108 #define X25_FAC_CALLED_AE 0xC9
110 #define X25_MARKER 0x00
111 #define X25_DTE_SERVICES 0x0F
112 #define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */
113 #define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */
115 /* Bitset in x25_sock->flags for misc flags */
116 #define X25_Q_BIT_FLAG 0
117 #define X25_INTERRUPT_FLAG 1
118 #define X25_ACCPT_APPRV_FLAG 2
121 * struct x25_route - x25 routing entry
122 * @node - entry in x25_list_lock
123 * @address - Start of address range
124 * @sigdigits - Number of sig digits
125 * @dev - More than one for MLP
126 * @refcnt - reference counter
129 struct list_head node
;
130 struct x25_address address
;
131 unsigned int sigdigits
;
132 struct net_device
*dev
;
137 struct list_head node
;
138 struct net_device
*dev
;
140 unsigned int extended
;
141 struct sk_buff_head queue
;
143 struct timer_list t20timer
;
144 unsigned long global_facil_mask
;
150 struct x25_address source_addr
, dest_addr
;
151 struct x25_neigh
*neighbour
;
152 unsigned int lci
, cudmatchlength
;
153 unsigned char state
, condition
;
154 unsigned short vs
, vr
, va
, vl
;
155 unsigned long t2
, t21
, t22
, t23
;
156 unsigned short fraglen
;
158 struct sk_buff_head ack_queue
;
159 struct sk_buff_head fragment_queue
;
160 struct sk_buff_head interrupt_in_queue
;
161 struct sk_buff_head interrupt_out_queue
;
162 struct timer_list timer
;
163 struct x25_causediag causediag
;
164 struct x25_facilities facilities
;
165 struct x25_dte_facilities dte_facilities
;
166 struct x25_calluserdata calluserdata
;
167 unsigned long vc_facil_mask
; /* inc_call facilities mask */
171 struct list_head node
;
173 struct net_device
*dev1
;
174 struct net_device
*dev2
;
178 static inline struct x25_sock
*x25_sk(const struct sock
*sk
)
180 return (struct x25_sock
*)sk
;
184 extern int sysctl_x25_restart_request_timeout
;
185 extern int sysctl_x25_call_request_timeout
;
186 extern int sysctl_x25_reset_request_timeout
;
187 extern int sysctl_x25_clear_request_timeout
;
188 extern int sysctl_x25_ack_holdback_timeout
;
189 extern int sysctl_x25_forward
;
191 int x25_parse_address_block(struct sk_buff
*skb
,
192 struct x25_address
*called_addr
,
193 struct x25_address
*calling_addr
);
195 int x25_addr_ntoa(unsigned char *, struct x25_address
*, struct x25_address
*);
196 int x25_addr_aton(unsigned char *, struct x25_address
*, struct x25_address
*);
197 struct sock
*x25_find_socket(unsigned int, struct x25_neigh
*);
198 void x25_destroy_socket_from_timer(struct sock
*);
199 int x25_rx_call_request(struct sk_buff
*, struct x25_neigh
*, unsigned int);
200 void x25_kill_by_neigh(struct x25_neigh
*);
203 void x25_send_frame(struct sk_buff
*, struct x25_neigh
*);
204 int x25_lapb_receive_frame(struct sk_buff
*, struct net_device
*,
205 struct packet_type
*, struct net_device
*);
206 void x25_establish_link(struct x25_neigh
*);
207 void x25_terminate_link(struct x25_neigh
*);
209 /* x25_facilities.c */
210 int x25_parse_facilities(struct sk_buff
*, struct x25_facilities
*,
211 struct x25_dte_facilities
*, unsigned long *);
212 int x25_create_facilities(unsigned char *, struct x25_facilities
*,
213 struct x25_dte_facilities
*, unsigned long);
214 int x25_negotiate_facilities(struct sk_buff
*, struct sock
*,
215 struct x25_facilities
*,
216 struct x25_dte_facilities
*);
217 void x25_limit_facilities(struct x25_facilities
*, struct x25_neigh
*);
220 void x25_clear_forward_by_lci(unsigned int lci
);
221 void x25_clear_forward_by_dev(struct net_device
*);
222 int x25_forward_data(int, struct x25_neigh
*, struct sk_buff
*);
223 int x25_forward_call(struct x25_address
*, struct x25_neigh
*, struct sk_buff
*,
227 int x25_process_rx_frame(struct sock
*, struct sk_buff
*);
228 int x25_backlog_rcv(struct sock
*, struct sk_buff
*);
231 void x25_link_control(struct sk_buff
*, struct x25_neigh
*, unsigned short);
232 void x25_link_device_up(struct net_device
*);
233 void x25_link_device_down(struct net_device
*);
234 void x25_link_established(struct x25_neigh
*);
235 void x25_link_terminated(struct x25_neigh
*);
236 void x25_transmit_clear_request(struct x25_neigh
*, unsigned int,
238 void x25_transmit_link(struct sk_buff
*, struct x25_neigh
*);
239 int x25_subscr_ioctl(unsigned int, void __user
*);
240 struct x25_neigh
*x25_get_neigh(struct net_device
*);
241 void x25_link_free(void);
244 static __inline__
void x25_neigh_hold(struct x25_neigh
*nb
)
246 refcount_inc(&nb
->refcnt
);
249 static __inline__
void x25_neigh_put(struct x25_neigh
*nb
)
251 if (refcount_dec_and_test(&nb
->refcnt
))
256 int x25_output(struct sock
*, struct sk_buff
*);
257 void x25_kick(struct sock
*);
258 void x25_enquiry_response(struct sock
*);
261 struct x25_route
*x25_get_route(struct x25_address
*addr
);
262 struct net_device
*x25_dev_get(char *);
263 void x25_route_device_down(struct net_device
*dev
);
264 int x25_route_ioctl(unsigned int, void __user
*);
265 void x25_route_free(void);
267 static __inline__
void x25_route_hold(struct x25_route
*rt
)
269 refcount_inc(&rt
->refcnt
);
272 static __inline__
void x25_route_put(struct x25_route
*rt
)
274 if (refcount_dec_and_test(&rt
->refcnt
))
279 void x25_clear_queues(struct sock
*);
280 void x25_frames_acked(struct sock
*, unsigned short);
281 void x25_requeue_frames(struct sock
*);
282 int x25_validate_nr(struct sock
*, unsigned short);
283 void x25_write_internal(struct sock
*, int);
284 int x25_decode(struct sock
*, struct sk_buff
*, int *, int *, int *, int *,
286 void x25_disconnect(struct sock
*, int, unsigned char, unsigned char);
289 void x25_init_timers(struct sock
*sk
);
290 void x25_start_heartbeat(struct sock
*);
291 void x25_start_t2timer(struct sock
*);
292 void x25_start_t21timer(struct sock
*);
293 void x25_start_t22timer(struct sock
*);
294 void x25_start_t23timer(struct sock
*);
295 void x25_stop_heartbeat(struct sock
*);
296 void x25_stop_timer(struct sock
*);
297 unsigned long x25_display_timer(struct sock
*);
298 void x25_check_rbuf(struct sock
*);
300 /* sysctl_net_x25.c */
302 int x25_register_sysctl(void);
303 void x25_unregister_sysctl(void);
305 static inline int x25_register_sysctl(void) { return 0; };
306 static inline void x25_unregister_sysctl(void) {};
307 #endif /* CONFIG_SYSCTL */
312 #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
314 extern struct hlist_head x25_list
;
315 extern rwlock_t x25_list_lock
;
316 extern struct list_head x25_route_list
;
317 extern rwlock_t x25_route_list_lock
;
318 extern struct list_head x25_forward_list
;
319 extern rwlock_t x25_forward_list_lock
;
320 extern struct list_head x25_neigh_list
;
321 extern rwlock_t x25_neigh_list_lock
;
323 int x25_proc_init(void);
324 void x25_proc_exit(void);