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 <net/sock.h> 14 15 #define X25_ADDR_LEN 16 16 17 #define X25_MAX_L2_LEN 18 /* 802.2 LLC */ 18 19 #define X25_STD_MIN_LEN 3 20 #define X25_EXT_MIN_LEN 4 21 22 #define X25_GFI_SEQ_MASK 0x30 23 #define X25_GFI_STDSEQ 0x10 24 #define X25_GFI_EXTSEQ 0x20 25 26 #define X25_Q_BIT 0x80 27 #define X25_D_BIT 0x40 28 #define X25_STD_M_BIT 0x10 29 #define X25_EXT_M_BIT 0x01 30 31 #define X25_CALL_REQUEST 0x0B 32 #define X25_CALL_ACCEPTED 0x0F 33 #define X25_CLEAR_REQUEST 0x13 34 #define X25_CLEAR_CONFIRMATION 0x17 35 #define X25_DATA 0x00 36 #define X25_INTERRUPT 0x23 37 #define X25_INTERRUPT_CONFIRMATION 0x27 38 #define X25_RR 0x01 39 #define X25_RNR 0x05 40 #define X25_REJ 0x09 41 #define X25_RESET_REQUEST 0x1B 42 #define X25_RESET_CONFIRMATION 0x1F 43 #define X25_REGISTRATION_REQUEST 0xF3 44 #define X25_REGISTRATION_CONFIRMATION 0xF7 45 #define X25_RESTART_REQUEST 0xFB 46 #define X25_RESTART_CONFIRMATION 0xFF 47 #define X25_DIAGNOSTIC 0xF1 48 #define X25_ILLEGAL 0xFD 49 50 /* Define the various conditions that may exist */ 51 52 #define X25_COND_ACK_PENDING 0x01 53 #define X25_COND_OWN_RX_BUSY 0x02 54 #define X25_COND_PEER_RX_BUSY 0x04 55 56 /* Define Link State constants. */ 57 enum { 58 X25_STATE_0, /* Ready */ 59 X25_STATE_1, /* Awaiting Call Accepted */ 60 X25_STATE_2, /* Awaiting Clear Confirmation */ 61 X25_STATE_3, /* Data Transfer */ 62 X25_STATE_4 /* Awaiting Reset Confirmation */ 63 }; 64 65 enum { 66 X25_LINK_STATE_0, 67 X25_LINK_STATE_1, 68 X25_LINK_STATE_2, 69 X25_LINK_STATE_3 70 }; 71 72 #define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */ 73 #define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */ 74 #define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */ 75 #define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */ 76 #define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */ 77 78 #define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */ 79 #define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */ 80 #define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */ 81 #define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */ 82 #define X25_DENY_ACCPT_APPRV 0x01 /* Default value */ 83 #define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */ 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 /** 116 * struct x25_route - x25 routing entry 117 * @node - entry in x25_list_lock 118 * @address - Start of address range 119 * @sigdigits - Number of sig digits 120 * @dev - More than one for MLP 121 * @refcnt - reference counter 122 */ 123 struct x25_route { 124 struct list_head node; 125 struct x25_address address; 126 unsigned int sigdigits; 127 struct net_device *dev; 128 atomic_t refcnt; 129 }; 130 131 struct x25_neigh { 132 struct list_head node; 133 struct net_device *dev; 134 unsigned int state; 135 unsigned int extended; 136 struct sk_buff_head queue; 137 unsigned long t20; 138 struct timer_list t20timer; 139 unsigned long global_facil_mask; 140 atomic_t refcnt; 141 }; 142 143 struct x25_sock { 144 struct sock sk; 145 struct x25_address source_addr, dest_addr; 146 struct x25_neigh *neighbour; 147 unsigned int lci, cudmatchlength; 148 unsigned char state, condition, qbitincl, intflag, accptapprv; 149 unsigned short vs, vr, va, vl; 150 unsigned long t2, t21, t22, t23; 151 unsigned short fraglen; 152 struct sk_buff_head ack_queue; 153 struct sk_buff_head fragment_queue; 154 struct sk_buff_head interrupt_in_queue; 155 struct sk_buff_head interrupt_out_queue; 156 struct timer_list timer; 157 struct x25_causediag causediag; 158 struct x25_facilities facilities; 159 struct x25_dte_facilities dte_facilities; 160 struct x25_calluserdata calluserdata; 161 unsigned long vc_facil_mask; /* inc_call facilities mask */ 162 }; 163 164 struct x25_forward { 165 struct list_head node; 166 unsigned int lci; 167 struct net_device *dev1; 168 struct net_device *dev2; 169 atomic_t refcnt; 170 }; 171 172 static inline struct x25_sock *x25_sk(const struct sock *sk) 173 { 174 return (struct x25_sock *)sk; 175 } 176 177 /* af_x25.c */ 178 extern int sysctl_x25_restart_request_timeout; 179 extern int sysctl_x25_call_request_timeout; 180 extern int sysctl_x25_reset_request_timeout; 181 extern int sysctl_x25_clear_request_timeout; 182 extern int sysctl_x25_ack_holdback_timeout; 183 184 extern int x25_addr_ntoa(unsigned char *, struct x25_address *, 185 struct x25_address *); 186 extern int x25_addr_aton(unsigned char *, struct x25_address *, 187 struct x25_address *); 188 extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 189 extern void x25_destroy_socket(struct sock *); 190 extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 191 extern void x25_kill_by_neigh(struct x25_neigh *); 192 193 /* x25_dev.c */ 194 extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 195 extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); 196 extern void x25_establish_link(struct x25_neigh *); 197 extern void x25_terminate_link(struct x25_neigh *); 198 199 /* x25_facilities.c */ 200 extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, 201 struct x25_dte_facilities *, unsigned long *); 202 extern int x25_create_facilities(unsigned char *, struct x25_facilities *, 203 struct x25_dte_facilities *, unsigned long); 204 extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, 205 struct x25_facilities *, 206 struct x25_dte_facilities *); 207 extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 208 209 /* x25_forward.c */ 210 extern void x25_clear_forward_by_lci(unsigned int lci); 211 extern void x25_clear_forward_by_dev(struct net_device *); 212 extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *); 213 extern int x25_forward_call(struct x25_address *, struct x25_neigh *, 214 struct sk_buff *, int); 215 216 /* x25_in.c */ 217 extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 218 extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 219 220 /* x25_link.c */ 221 extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 222 extern void x25_link_device_up(struct net_device *); 223 extern void x25_link_device_down(struct net_device *); 224 extern void x25_link_established(struct x25_neigh *); 225 extern void x25_link_terminated(struct x25_neigh *); 226 extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 227 extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 228 extern int x25_subscr_ioctl(unsigned int, void __user *); 229 extern struct x25_neigh *x25_get_neigh(struct net_device *); 230 extern void x25_link_free(void); 231 232 /* x25_neigh.c */ 233 static __inline__ void x25_neigh_hold(struct x25_neigh *nb) 234 { 235 atomic_inc(&nb->refcnt); 236 } 237 238 static __inline__ void x25_neigh_put(struct x25_neigh *nb) 239 { 240 if (atomic_dec_and_test(&nb->refcnt)) 241 kfree(nb); 242 } 243 244 /* x25_out.c */ 245 extern int x25_output(struct sock *, struct sk_buff *); 246 extern void x25_kick(struct sock *); 247 extern void x25_enquiry_response(struct sock *); 248 249 /* x25_route.c */ 250 extern struct x25_route *x25_get_route(struct x25_address *addr); 251 extern struct net_device *x25_dev_get(char *); 252 extern void x25_route_device_down(struct net_device *dev); 253 extern int x25_route_ioctl(unsigned int, void __user *); 254 extern void x25_route_free(void); 255 256 static __inline__ void x25_route_hold(struct x25_route *rt) 257 { 258 atomic_inc(&rt->refcnt); 259 } 260 261 static __inline__ void x25_route_put(struct x25_route *rt) 262 { 263 if (atomic_dec_and_test(&rt->refcnt)) 264 kfree(rt); 265 } 266 267 /* x25_subr.c */ 268 extern void x25_clear_queues(struct sock *); 269 extern void x25_frames_acked(struct sock *, unsigned short); 270 extern void x25_requeue_frames(struct sock *); 271 extern int x25_validate_nr(struct sock *, unsigned short); 272 extern void x25_write_internal(struct sock *, int); 273 extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 274 extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 275 276 /* x25_timer.c */ 277 extern void x25_init_timers(struct sock *sk); 278 extern void x25_start_heartbeat(struct sock *); 279 extern void x25_start_t2timer(struct sock *); 280 extern void x25_start_t21timer(struct sock *); 281 extern void x25_start_t22timer(struct sock *); 282 extern void x25_start_t23timer(struct sock *); 283 extern void x25_stop_heartbeat(struct sock *); 284 extern void x25_stop_timer(struct sock *); 285 extern unsigned long x25_display_timer(struct sock *); 286 extern void x25_check_rbuf(struct sock *); 287 288 /* sysctl_net_x25.c */ 289 extern void x25_register_sysctl(void); 290 extern void x25_unregister_sysctl(void); 291 struct x25_skb_cb { 292 unsigned flags; 293 }; 294 #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 295 296 extern struct hlist_head x25_list; 297 extern rwlock_t x25_list_lock; 298 extern struct list_head x25_route_list; 299 extern rwlock_t x25_route_list_lock; 300 extern struct list_head x25_forward_list; 301 extern rwlock_t x25_forward_list_lock; 302 303 extern int x25_proc_init(void); 304 extern void x25_proc_exit(void); 305 #endif 306