x25.h 9.3 KB

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  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. #ifndef _X25_H
  10. #define _X25_H
  11. #include <linux/x25.h>
  12. #include <net/sock.h>
  13. #define X25_ADDR_LEN 16
  14. #define X25_MAX_L2_LEN 18 /* 802.2 LLC */
  15. #define X25_STD_MIN_LEN 3
  16. #define X25_EXT_MIN_LEN 4
  17. #define X25_GFI_SEQ_MASK 0x30
  18. #define X25_GFI_STDSEQ 0x10
  19. #define X25_GFI_EXTSEQ 0x20
  20. #define X25_Q_BIT 0x80
  21. #define X25_D_BIT 0x40
  22. #define X25_STD_M_BIT 0x10
  23. #define X25_EXT_M_BIT 0x01
  24. #define X25_CALL_REQUEST 0x0B
  25. #define X25_CALL_ACCEPTED 0x0F
  26. #define X25_CLEAR_REQUEST 0x13
  27. #define X25_CLEAR_CONFIRMATION 0x17
  28. #define X25_DATA 0x00
  29. #define X25_INTERRUPT 0x23
  30. #define X25_INTERRUPT_CONFIRMATION 0x27
  31. #define X25_RR 0x01
  32. #define X25_RNR 0x05
  33. #define X25_REJ 0x09
  34. #define X25_RESET_REQUEST 0x1B
  35. #define X25_RESET_CONFIRMATION 0x1F
  36. #define X25_REGISTRATION_REQUEST 0xF3
  37. #define X25_REGISTRATION_CONFIRMATION 0xF7
  38. #define X25_RESTART_REQUEST 0xFB
  39. #define X25_RESTART_CONFIRMATION 0xFF
  40. #define X25_DIAGNOSTIC 0xF1
  41. #define X25_ILLEGAL 0xFD
  42. /* Define the various conditions that may exist */
  43. #define X25_COND_ACK_PENDING 0x01
  44. #define X25_COND_OWN_RX_BUSY 0x02
  45. #define X25_COND_PEER_RX_BUSY 0x04
  46. /* Define Link State constants. */
  47. enum {
  48. X25_STATE_0, /* Ready */
  49. X25_STATE_1, /* Awaiting Call Accepted */
  50. X25_STATE_2, /* Awaiting Clear Confirmation */
  51. X25_STATE_3, /* Data Transfer */
  52. X25_STATE_4 /* Awaiting Reset Confirmation */
  53. };
  54. enum {
  55. X25_LINK_STATE_0,
  56. X25_LINK_STATE_1,
  57. X25_LINK_STATE_2,
  58. X25_LINK_STATE_3
  59. };
  60. #define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */
  61. #define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */
  62. #define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */
  63. #define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */
  64. #define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */
  65. #define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */
  66. #define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */
  67. #define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */
  68. #define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */
  69. #define X25_DENY_ACCPT_APPRV 0x01 /* Default value */
  70. #define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */
  71. #define X25_SMODULUS 8
  72. #define X25_EMODULUS 128
  73. /*
  74. * X.25 Facilities constants.
  75. */
  76. #define X25_FAC_CLASS_MASK 0xC0
  77. #define X25_FAC_CLASS_A 0x00
  78. #define X25_FAC_CLASS_B 0x40
  79. #define X25_FAC_CLASS_C 0x80
  80. #define X25_FAC_CLASS_D 0xC0
  81. #define X25_FAC_REVERSE 0x01 /* also fast select */
  82. #define X25_FAC_THROUGHPUT 0x02
  83. #define X25_FAC_PACKET_SIZE 0x42
  84. #define X25_FAC_WINDOW_SIZE 0x43
  85. #define X25_MAX_FAC_LEN 60
  86. #define X25_MAX_CUD_LEN 128
  87. #define X25_FAC_CALLING_AE 0xCB
  88. #define X25_FAC_CALLED_AE 0xC9
  89. #define X25_MARKER 0x00
  90. #define X25_DTE_SERVICES 0x0F
  91. #define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */
  92. #define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */
  93. /**
  94. * struct x25_route - x25 routing entry
  95. * @node - entry in x25_list_lock
  96. * @address - Start of address range
  97. * @sigdigits - Number of sig digits
  98. * @dev - More than one for MLP
  99. * @refcnt - reference counter
  100. */
  101. struct x25_route {
  102. struct list_head node;
  103. struct x25_address address;
  104. unsigned int sigdigits;
  105. struct net_device *dev;
  106. atomic_t refcnt;
  107. };
  108. struct x25_neigh {
  109. struct list_head node;
  110. struct net_device *dev;
  111. unsigned int state;
  112. unsigned int extended;
  113. struct sk_buff_head queue;
  114. unsigned long t20;
  115. struct timer_list t20timer;
  116. unsigned long global_facil_mask;
  117. atomic_t refcnt;
  118. };
  119. struct x25_sock {
  120. struct sock sk;
  121. struct x25_address source_addr, dest_addr;
  122. struct x25_neigh *neighbour;
  123. unsigned int lci, cudmatchlength;
  124. unsigned char state, condition, qbitincl, intflag, accptapprv;
  125. unsigned short vs, vr, va, vl;
  126. unsigned long t2, t21, t22, t23;
  127. unsigned short fraglen;
  128. struct sk_buff_head ack_queue;
  129. struct sk_buff_head fragment_queue;
  130. struct sk_buff_head interrupt_in_queue;
  131. struct sk_buff_head interrupt_out_queue;
  132. struct timer_list timer;
  133. struct x25_causediag causediag;
  134. struct x25_facilities facilities;
  135. struct x25_dte_facilities dte_facilities;
  136. struct x25_calluserdata calluserdata;
  137. unsigned long vc_facil_mask; /* inc_call facilities mask */
  138. };
  139. struct x25_forward {
  140. struct list_head node;
  141. unsigned int lci;
  142. struct net_device *dev1;
  143. struct net_device *dev2;
  144. atomic_t refcnt;
  145. };
  146. static inline struct x25_sock *x25_sk(const struct sock *sk)
  147. {
  148. return (struct x25_sock *)sk;
  149. }
  150. /* af_x25.c */
  151. extern int sysctl_x25_restart_request_timeout;
  152. extern int sysctl_x25_call_request_timeout;
  153. extern int sysctl_x25_reset_request_timeout;
  154. extern int sysctl_x25_clear_request_timeout;
  155. extern int sysctl_x25_ack_holdback_timeout;
  156. extern int sysctl_x25_forward;
  157. extern int x25_addr_ntoa(unsigned char *, struct x25_address *,
  158. struct x25_address *);
  159. extern int x25_addr_aton(unsigned char *, struct x25_address *,
  160. struct x25_address *);
  161. extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
  162. extern void x25_destroy_socket(struct sock *);
  163. extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
  164. extern void x25_kill_by_neigh(struct x25_neigh *);
  165. /* x25_dev.c */
  166. extern void x25_send_frame(struct sk_buff *, struct x25_neigh *);
  167. extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
  168. extern void x25_establish_link(struct x25_neigh *);
  169. extern void x25_terminate_link(struct x25_neigh *);
  170. /* x25_facilities.c */
  171. extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *,
  172. struct x25_dte_facilities *, unsigned long *);
  173. extern int x25_create_facilities(unsigned char *, struct x25_facilities *,
  174. struct x25_dte_facilities *, unsigned long);
  175. extern int x25_negotiate_facilities(struct sk_buff *, struct sock *,
  176. struct x25_facilities *,
  177. struct x25_dte_facilities *);
  178. extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
  179. /* x25_forward.c */
  180. extern void x25_clear_forward_by_lci(unsigned int lci);
  181. extern void x25_clear_forward_by_dev(struct net_device *);
  182. extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *);
  183. extern int x25_forward_call(struct x25_address *, struct x25_neigh *,
  184. struct sk_buff *, int);
  185. /* x25_in.c */
  186. extern int x25_process_rx_frame(struct sock *, struct sk_buff *);
  187. extern int x25_backlog_rcv(struct sock *, struct sk_buff *);
  188. /* x25_link.c */
  189. extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
  190. extern void x25_link_device_up(struct net_device *);
  191. extern void x25_link_device_down(struct net_device *);
  192. extern void x25_link_established(struct x25_neigh *);
  193. extern void x25_link_terminated(struct x25_neigh *);
  194. extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char);
  195. extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
  196. extern int x25_subscr_ioctl(unsigned int, void __user *);
  197. extern struct x25_neigh *x25_get_neigh(struct net_device *);
  198. extern void x25_link_free(void);
  199. /* x25_neigh.c */
  200. static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
  201. {
  202. atomic_inc(&nb->refcnt);
  203. }
  204. static __inline__ void x25_neigh_put(struct x25_neigh *nb)
  205. {
  206. if (atomic_dec_and_test(&nb->refcnt))
  207. kfree(nb);
  208. }
  209. /* x25_out.c */
  210. extern int x25_output(struct sock *, struct sk_buff *);
  211. extern void x25_kick(struct sock *);
  212. extern void x25_enquiry_response(struct sock *);
  213. /* x25_route.c */
  214. extern struct x25_route *x25_get_route(struct x25_address *addr);
  215. extern struct net_device *x25_dev_get(char *);
  216. extern void x25_route_device_down(struct net_device *dev);
  217. extern int x25_route_ioctl(unsigned int, void __user *);
  218. extern void x25_route_free(void);
  219. static __inline__ void x25_route_hold(struct x25_route *rt)
  220. {
  221. atomic_inc(&rt->refcnt);
  222. }
  223. static __inline__ void x25_route_put(struct x25_route *rt)
  224. {
  225. if (atomic_dec_and_test(&rt->refcnt))
  226. kfree(rt);
  227. }
  228. /* x25_subr.c */
  229. extern void x25_clear_queues(struct sock *);
  230. extern void x25_frames_acked(struct sock *, unsigned short);
  231. extern void x25_requeue_frames(struct sock *);
  232. extern int x25_validate_nr(struct sock *, unsigned short);
  233. extern void x25_write_internal(struct sock *, int);
  234. extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *);
  235. extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
  236. /* x25_timer.c */
  237. extern void x25_init_timers(struct sock *sk);
  238. extern void x25_start_heartbeat(struct sock *);
  239. extern void x25_start_t2timer(struct sock *);
  240. extern void x25_start_t21timer(struct sock *);
  241. extern void x25_start_t22timer(struct sock *);
  242. extern void x25_start_t23timer(struct sock *);
  243. extern void x25_stop_heartbeat(struct sock *);
  244. extern void x25_stop_timer(struct sock *);
  245. extern unsigned long x25_display_timer(struct sock *);
  246. extern void x25_check_rbuf(struct sock *);
  247. /* sysctl_net_x25.c */
  248. extern void x25_register_sysctl(void);
  249. extern void x25_unregister_sysctl(void);
  250. struct x25_skb_cb {
  251. unsigned flags;
  252. };
  253. #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
  254. extern struct hlist_head x25_list;
  255. extern rwlock_t x25_list_lock;
  256. extern struct list_head x25_route_list;
  257. extern rwlock_t x25_route_list_lock;
  258. extern struct list_head x25_forward_list;
  259. extern rwlock_t x25_forward_list_lock;
  260. extern int x25_proc_init(void);
  261. extern void x25_proc_exit(void);
  262. #endif