tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Declarations of X.25 Packet Layer type objects.
3 *
4 * History
5 * nov/17/96 Jonathan Naylor Initial version.
6 * mar/20/00 Daniela Squassoni Disabling/enabling of facilities
7 * negotiation.
8 */
9
10#ifndef _X25_H
11#define _X25_H
12#include <linux/x25.h>
13#include <linux/slab.h>
14#include <linux/refcount.h>
15#include <net/sock.h>
16
17#define X25_ADDR_LEN 16
18
19#define X25_MAX_L2_LEN 18 /* 802.2 LLC */
20
21#define X25_STD_MIN_LEN 3
22#define X25_EXT_MIN_LEN 4
23
24#define X25_GFI_SEQ_MASK 0x30
25#define X25_GFI_STDSEQ 0x10
26#define X25_GFI_EXTSEQ 0x20
27
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
32
33#define X25_CALL_REQUEST 0x0B
34#define X25_CALL_ACCEPTED 0x0F
35#define X25_CLEAR_REQUEST 0x13
36#define X25_CLEAR_CONFIRMATION 0x17
37#define X25_DATA 0x00
38#define X25_INTERRUPT 0x23
39#define X25_INTERRUPT_CONFIRMATION 0x27
40#define X25_RR 0x01
41#define X25_RNR 0x05
42#define X25_REJ 0x09
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
51
52/* Define the various conditions that may exist */
53
54#define X25_COND_ACK_PENDING 0x01
55#define X25_COND_OWN_RX_BUSY 0x02
56#define X25_COND_PEER_RX_BUSY 0x04
57
58/* Define Link State constants. */
59enum {
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 */
65};
66
67enum {
68 X25_LINK_STATE_0,
69 X25_LINK_STATE_1,
70 X25_LINK_STATE_2,
71 X25_LINK_STATE_3
72};
73
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 */
79
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 */
84
85#define X25_SMODULUS 8
86#define X25_EMODULUS 128
87
88/*
89 * X.25 Facilities constants.
90 */
91
92#define X25_FAC_CLASS_MASK 0xC0
93
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
98
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
103
104#define X25_MAX_FAC_LEN 60
105#define X25_MAX_CUD_LEN 128
106
107#define X25_FAC_CALLING_AE 0xCB
108#define X25_FAC_CALLED_AE 0xC9
109
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 */
114
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
119
120/**
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
127 */
128struct x25_route {
129 struct list_head node;
130 struct x25_address address;
131 unsigned int sigdigits;
132 struct net_device *dev;
133 refcount_t refcnt;
134};
135
136struct x25_neigh {
137 struct list_head node;
138 struct net_device *dev;
139 unsigned int state;
140 unsigned int extended;
141 struct sk_buff_head queue;
142 unsigned long t20;
143 struct timer_list t20timer;
144 unsigned long global_facil_mask;
145 refcount_t refcnt;
146};
147
148struct x25_sock {
149 struct sock sk;
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;
157 unsigned long flags;
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 */
168};
169
170struct x25_forward {
171 struct list_head node;
172 unsigned int lci;
173 struct net_device *dev1;
174 struct net_device *dev2;
175 atomic_t refcnt;
176};
177
178static inline struct x25_sock *x25_sk(const struct sock *sk)
179{
180 return (struct x25_sock *)sk;
181}
182
183/* af_x25.c */
184extern int sysctl_x25_restart_request_timeout;
185extern int sysctl_x25_call_request_timeout;
186extern int sysctl_x25_reset_request_timeout;
187extern int sysctl_x25_clear_request_timeout;
188extern int sysctl_x25_ack_holdback_timeout;
189extern int sysctl_x25_forward;
190
191int x25_parse_address_block(struct sk_buff *skb,
192 struct x25_address *called_addr,
193 struct x25_address *calling_addr);
194
195int x25_addr_ntoa(unsigned char *, struct x25_address *, struct x25_address *);
196int x25_addr_aton(unsigned char *, struct x25_address *, struct x25_address *);
197struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
198void x25_destroy_socket_from_timer(struct sock *);
199int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
200void x25_kill_by_neigh(struct x25_neigh *);
201
202/* x25_dev.c */
203void x25_send_frame(struct sk_buff *, struct x25_neigh *);
204int x25_lapb_receive_frame(struct sk_buff *, struct net_device *,
205 struct packet_type *, struct net_device *);
206void x25_establish_link(struct x25_neigh *);
207void x25_terminate_link(struct x25_neigh *);
208
209/* x25_facilities.c */
210int x25_parse_facilities(struct sk_buff *, struct x25_facilities *,
211 struct x25_dte_facilities *, unsigned long *);
212int x25_create_facilities(unsigned char *, struct x25_facilities *,
213 struct x25_dte_facilities *, unsigned long);
214int x25_negotiate_facilities(struct sk_buff *, struct sock *,
215 struct x25_facilities *,
216 struct x25_dte_facilities *);
217void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
218
219/* x25_forward.c */
220void x25_clear_forward_by_lci(unsigned int lci);
221void x25_clear_forward_by_dev(struct net_device *);
222int x25_forward_data(int, struct x25_neigh *, struct sk_buff *);
223int x25_forward_call(struct x25_address *, struct x25_neigh *, struct sk_buff *,
224 int);
225
226/* x25_in.c */
227int x25_process_rx_frame(struct sock *, struct sk_buff *);
228int x25_backlog_rcv(struct sock *, struct sk_buff *);
229
230/* x25_link.c */
231void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
232void x25_link_device_up(struct net_device *);
233void x25_link_device_down(struct net_device *);
234void x25_link_established(struct x25_neigh *);
235void x25_link_terminated(struct x25_neigh *);
236void x25_transmit_clear_request(struct x25_neigh *, unsigned int,
237 unsigned char);
238void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
239int x25_subscr_ioctl(unsigned int, void __user *);
240struct x25_neigh *x25_get_neigh(struct net_device *);
241void x25_link_free(void);
242
243/* x25_neigh.c */
244static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
245{
246 refcount_inc(&nb->refcnt);
247}
248
249static __inline__ void x25_neigh_put(struct x25_neigh *nb)
250{
251 if (refcount_dec_and_test(&nb->refcnt))
252 kfree(nb);
253}
254
255/* x25_out.c */
256int x25_output(struct sock *, struct sk_buff *);
257void x25_kick(struct sock *);
258void x25_enquiry_response(struct sock *);
259
260/* x25_route.c */
261struct x25_route *x25_get_route(struct x25_address *addr);
262struct net_device *x25_dev_get(char *);
263void x25_route_device_down(struct net_device *dev);
264int x25_route_ioctl(unsigned int, void __user *);
265void x25_route_free(void);
266
267static __inline__ void x25_route_hold(struct x25_route *rt)
268{
269 refcount_inc(&rt->refcnt);
270}
271
272static __inline__ void x25_route_put(struct x25_route *rt)
273{
274 if (refcount_dec_and_test(&rt->refcnt))
275 kfree(rt);
276}
277
278/* x25_subr.c */
279void x25_clear_queues(struct sock *);
280void x25_frames_acked(struct sock *, unsigned short);
281void x25_requeue_frames(struct sock *);
282int x25_validate_nr(struct sock *, unsigned short);
283void x25_write_internal(struct sock *, int);
284int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *,
285 int *);
286void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
287
288/* x25_timer.c */
289void x25_init_timers(struct sock *sk);
290void x25_start_heartbeat(struct sock *);
291void x25_start_t2timer(struct sock *);
292void x25_start_t21timer(struct sock *);
293void x25_start_t22timer(struct sock *);
294void x25_start_t23timer(struct sock *);
295void x25_stop_heartbeat(struct sock *);
296void x25_stop_timer(struct sock *);
297unsigned long x25_display_timer(struct sock *);
298void x25_check_rbuf(struct sock *);
299
300/* sysctl_net_x25.c */
301#ifdef CONFIG_SYSCTL
302int x25_register_sysctl(void);
303void x25_unregister_sysctl(void);
304#else
305static inline int x25_register_sysctl(void) { return 0; };
306static inline void x25_unregister_sysctl(void) {};
307#endif /* CONFIG_SYSCTL */
308
309struct x25_skb_cb {
310 unsigned int flags;
311};
312#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
313
314extern struct hlist_head x25_list;
315extern rwlock_t x25_list_lock;
316extern struct list_head x25_route_list;
317extern rwlock_t x25_route_list_lock;
318extern struct list_head x25_forward_list;
319extern rwlock_t x25_forward_list_lock;
320extern struct list_head x25_neigh_list;
321extern rwlock_t x25_neigh_list_lock;
322
323int x25_proc_init(void);
324void x25_proc_exit(void);
325#endif