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 83 #define X25_SMODULUS 8 84 #define X25_EMODULUS 128 85 86 /* 87 * X.25 Facilities constants. 88 */ 89 90 #define X25_FAC_CLASS_MASK 0xC0 91 92 #define X25_FAC_CLASS_A 0x00 93 #define X25_FAC_CLASS_B 0x40 94 #define X25_FAC_CLASS_C 0x80 95 #define X25_FAC_CLASS_D 0xC0 96 97 #define X25_FAC_REVERSE 0x01 98 #define X25_FAC_THROUGHPUT 0x02 99 #define X25_FAC_PACKET_SIZE 0x42 100 #define X25_FAC_WINDOW_SIZE 0x43 101 102 #define X25_MAX_FAC_LEN 20 /* Plenty to spare */ 103 #define X25_MAX_CUD_LEN 128 104 105 /** 106 * struct x25_route - x25 routing entry 107 * @node - entry in x25_list_lock 108 * @address - Start of address range 109 * @sigdigits - Number of sig digits 110 * @dev - More than one for MLP 111 * @refcnt - reference counter 112 */ 113 struct x25_route { 114 struct list_head node; 115 struct x25_address address; 116 unsigned int sigdigits; 117 struct net_device *dev; 118 atomic_t refcnt; 119 }; 120 121 struct x25_neigh { 122 struct list_head node; 123 struct net_device *dev; 124 unsigned int state; 125 unsigned int extended; 126 struct sk_buff_head queue; 127 unsigned long t20; 128 struct timer_list t20timer; 129 unsigned long global_facil_mask; 130 atomic_t refcnt; 131 }; 132 133 struct x25_sock { 134 struct sock sk; 135 struct x25_address source_addr, dest_addr; 136 struct x25_neigh *neighbour; 137 unsigned int lci; 138 unsigned char state, condition, qbitincl, intflag; 139 unsigned short vs, vr, va, vl; 140 unsigned long t2, t21, t22, t23; 141 unsigned short fraglen; 142 struct sk_buff_head ack_queue; 143 struct sk_buff_head fragment_queue; 144 struct sk_buff_head interrupt_in_queue; 145 struct sk_buff_head interrupt_out_queue; 146 struct timer_list timer; 147 struct x25_causediag causediag; 148 struct x25_facilities facilities; 149 struct x25_calluserdata calluserdata; 150 unsigned long vc_facil_mask; /* inc_call facilities mask */ 151 }; 152 153 static inline struct x25_sock *x25_sk(const struct sock *sk) 154 { 155 return (struct x25_sock *)sk; 156 } 157 158 /* af_x25.c */ 159 extern int sysctl_x25_restart_request_timeout; 160 extern int sysctl_x25_call_request_timeout; 161 extern int sysctl_x25_reset_request_timeout; 162 extern int sysctl_x25_clear_request_timeout; 163 extern int sysctl_x25_ack_holdback_timeout; 164 165 extern int x25_addr_ntoa(unsigned char *, struct x25_address *, 166 struct x25_address *); 167 extern int x25_addr_aton(unsigned char *, struct x25_address *, 168 struct x25_address *); 169 extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 170 extern void x25_destroy_socket(struct sock *); 171 extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 172 extern void x25_kill_by_neigh(struct x25_neigh *); 173 174 /* x25_dev.c */ 175 extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 176 extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); 177 extern void x25_establish_link(struct x25_neigh *); 178 extern void x25_terminate_link(struct x25_neigh *); 179 180 /* x25_facilities.c */ 181 extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *); 182 extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long); 183 extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *); 184 extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 185 186 /* x25_in.c */ 187 extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 188 extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 189 190 /* x25_link.c */ 191 extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 192 extern void x25_link_device_up(struct net_device *); 193 extern void x25_link_device_down(struct net_device *); 194 extern void x25_link_established(struct x25_neigh *); 195 extern void x25_link_terminated(struct x25_neigh *); 196 extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 197 extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 198 extern int x25_subscr_ioctl(unsigned int, void __user *); 199 extern struct x25_neigh *x25_get_neigh(struct net_device *); 200 extern void x25_link_free(void); 201 202 /* x25_neigh.c */ 203 static __inline__ void x25_neigh_hold(struct x25_neigh *nb) 204 { 205 atomic_inc(&nb->refcnt); 206 } 207 208 static __inline__ void x25_neigh_put(struct x25_neigh *nb) 209 { 210 if (atomic_dec_and_test(&nb->refcnt)) 211 kfree(nb); 212 } 213 214 /* x25_out.c */ 215 extern int x25_output(struct sock *, struct sk_buff *); 216 extern void x25_kick(struct sock *); 217 extern void x25_enquiry_response(struct sock *); 218 219 /* x25_route.c */ 220 extern struct x25_route *x25_get_route(struct x25_address *addr); 221 extern struct net_device *x25_dev_get(char *); 222 extern void x25_route_device_down(struct net_device *dev); 223 extern int x25_route_ioctl(unsigned int, void __user *); 224 extern void x25_route_free(void); 225 226 static __inline__ void x25_route_hold(struct x25_route *rt) 227 { 228 atomic_inc(&rt->refcnt); 229 } 230 231 static __inline__ void x25_route_put(struct x25_route *rt) 232 { 233 if (atomic_dec_and_test(&rt->refcnt)) 234 kfree(rt); 235 } 236 237 /* x25_subr.c */ 238 extern void x25_clear_queues(struct sock *); 239 extern void x25_frames_acked(struct sock *, unsigned short); 240 extern void x25_requeue_frames(struct sock *); 241 extern int x25_validate_nr(struct sock *, unsigned short); 242 extern void x25_write_internal(struct sock *, int); 243 extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 244 extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 245 extern int x25_check_calluserdata(struct x25_calluserdata *,struct x25_calluserdata *); 246 247 /* x25_timer.c */ 248 extern void x25_start_heartbeat(struct sock *); 249 extern void x25_start_t2timer(struct sock *); 250 extern void x25_start_t21timer(struct sock *); 251 extern void x25_start_t22timer(struct sock *); 252 extern void x25_start_t23timer(struct sock *); 253 extern void x25_stop_heartbeat(struct sock *); 254 extern void x25_stop_timer(struct sock *); 255 extern unsigned long x25_display_timer(struct sock *); 256 extern void x25_check_rbuf(struct sock *); 257 258 /* sysctl_net_x25.c */ 259 extern void x25_register_sysctl(void); 260 extern void x25_unregister_sysctl(void); 261 struct x25_skb_cb { 262 unsigned flags; 263 }; 264 #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 265 266 extern struct hlist_head x25_list; 267 extern rwlock_t x25_list_lock; 268 extern struct list_head x25_route_list; 269 extern rwlock_t x25_route_list_lock; 270 271 extern int x25_proc_init(void); 272 extern void x25_proc_exit(void); 273 #endif 274