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. */ 57enum { 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 65enum { 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 */ 123struct 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 131struct 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 143struct 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 164struct 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 172static inline struct x25_sock *x25_sk(const struct sock *sk) 173{ 174 return (struct x25_sock *)sk; 175} 176 177/* af_x25.c */ 178extern int sysctl_x25_restart_request_timeout; 179extern int sysctl_x25_call_request_timeout; 180extern int sysctl_x25_reset_request_timeout; 181extern int sysctl_x25_clear_request_timeout; 182extern int sysctl_x25_ack_holdback_timeout; 183extern int sysctl_x25_forward; 184 185extern int x25_addr_ntoa(unsigned char *, struct x25_address *, 186 struct x25_address *); 187extern int x25_addr_aton(unsigned char *, struct x25_address *, 188 struct x25_address *); 189extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 190extern void x25_destroy_socket(struct sock *); 191extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 192extern void x25_kill_by_neigh(struct x25_neigh *); 193 194/* x25_dev.c */ 195extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 196extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); 197extern void x25_establish_link(struct x25_neigh *); 198extern void x25_terminate_link(struct x25_neigh *); 199 200/* x25_facilities.c */ 201extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, 202 struct x25_dte_facilities *, unsigned long *); 203extern int x25_create_facilities(unsigned char *, struct x25_facilities *, 204 struct x25_dte_facilities *, unsigned long); 205extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, 206 struct x25_facilities *, 207 struct x25_dte_facilities *); 208extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 209 210/* x25_forward.c */ 211extern void x25_clear_forward_by_lci(unsigned int lci); 212extern void x25_clear_forward_by_dev(struct net_device *); 213extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *); 214extern int x25_forward_call(struct x25_address *, struct x25_neigh *, 215 struct sk_buff *, int); 216 217/* x25_in.c */ 218extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 219extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 220 221/* x25_link.c */ 222extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 223extern void x25_link_device_up(struct net_device *); 224extern void x25_link_device_down(struct net_device *); 225extern void x25_link_established(struct x25_neigh *); 226extern void x25_link_terminated(struct x25_neigh *); 227extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 228extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 229extern int x25_subscr_ioctl(unsigned int, void __user *); 230extern struct x25_neigh *x25_get_neigh(struct net_device *); 231extern void x25_link_free(void); 232 233/* x25_neigh.c */ 234static __inline__ void x25_neigh_hold(struct x25_neigh *nb) 235{ 236 atomic_inc(&nb->refcnt); 237} 238 239static __inline__ void x25_neigh_put(struct x25_neigh *nb) 240{ 241 if (atomic_dec_and_test(&nb->refcnt)) 242 kfree(nb); 243} 244 245/* x25_out.c */ 246extern int x25_output(struct sock *, struct sk_buff *); 247extern void x25_kick(struct sock *); 248extern void x25_enquiry_response(struct sock *); 249 250/* x25_route.c */ 251extern struct x25_route *x25_get_route(struct x25_address *addr); 252extern struct net_device *x25_dev_get(char *); 253extern void x25_route_device_down(struct net_device *dev); 254extern int x25_route_ioctl(unsigned int, void __user *); 255extern void x25_route_free(void); 256 257static __inline__ void x25_route_hold(struct x25_route *rt) 258{ 259 atomic_inc(&rt->refcnt); 260} 261 262static __inline__ void x25_route_put(struct x25_route *rt) 263{ 264 if (atomic_dec_and_test(&rt->refcnt)) 265 kfree(rt); 266} 267 268/* x25_subr.c */ 269extern void x25_clear_queues(struct sock *); 270extern void x25_frames_acked(struct sock *, unsigned short); 271extern void x25_requeue_frames(struct sock *); 272extern int x25_validate_nr(struct sock *, unsigned short); 273extern void x25_write_internal(struct sock *, int); 274extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 275extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 276 277/* x25_timer.c */ 278extern void x25_init_timers(struct sock *sk); 279extern void x25_start_heartbeat(struct sock *); 280extern void x25_start_t2timer(struct sock *); 281extern void x25_start_t21timer(struct sock *); 282extern void x25_start_t22timer(struct sock *); 283extern void x25_start_t23timer(struct sock *); 284extern void x25_stop_heartbeat(struct sock *); 285extern void x25_stop_timer(struct sock *); 286extern unsigned long x25_display_timer(struct sock *); 287extern void x25_check_rbuf(struct sock *); 288 289/* sysctl_net_x25.c */ 290extern void x25_register_sysctl(void); 291extern void x25_unregister_sysctl(void); 292struct x25_skb_cb { 293 unsigned flags; 294}; 295#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 296 297extern struct hlist_head x25_list; 298extern rwlock_t x25_list_lock; 299extern struct list_head x25_route_list; 300extern rwlock_t x25_route_list_lock; 301extern struct list_head x25_forward_list; 302extern rwlock_t x25_forward_list_lock; 303 304extern int x25_proc_init(void); 305extern void x25_proc_exit(void); 306#endif 307