/* * Declarations of X.25 Packet Layer type objects. * * History * nov/17/96 Jonathan Naylor Initial version. * mar/20/00 Daniela Squassoni Disabling/enabling of facilities * negotiation. */ #ifndef _X25_H #define _X25_H #include #include #define X25_ADDR_LEN 16 #define X25_MAX_L2_LEN 18 /* 802.2 LLC */ #define X25_STD_MIN_LEN 3 #define X25_EXT_MIN_LEN 4 #define X25_GFI_SEQ_MASK 0x30 #define X25_GFI_STDSEQ 0x10 #define X25_GFI_EXTSEQ 0x20 #define X25_Q_BIT 0x80 #define X25_D_BIT 0x40 #define X25_STD_M_BIT 0x10 #define X25_EXT_M_BIT 0x01 #define X25_CALL_REQUEST 0x0B #define X25_CALL_ACCEPTED 0x0F #define X25_CLEAR_REQUEST 0x13 #define X25_CLEAR_CONFIRMATION 0x17 #define X25_DATA 0x00 #define X25_INTERRUPT 0x23 #define X25_INTERRUPT_CONFIRMATION 0x27 #define X25_RR 0x01 #define X25_RNR 0x05 #define X25_REJ 0x09 #define X25_RESET_REQUEST 0x1B #define X25_RESET_CONFIRMATION 0x1F #define X25_REGISTRATION_REQUEST 0xF3 #define X25_REGISTRATION_CONFIRMATION 0xF7 #define X25_RESTART_REQUEST 0xFB #define X25_RESTART_CONFIRMATION 0xFF #define X25_DIAGNOSTIC 0xF1 #define X25_ILLEGAL 0xFD /* Define the various conditions that may exist */ #define X25_COND_ACK_PENDING 0x01 #define X25_COND_OWN_RX_BUSY 0x02 #define X25_COND_PEER_RX_BUSY 0x04 /* Define Link State constants. */ enum { X25_STATE_0, /* Ready */ X25_STATE_1, /* Awaiting Call Accepted */ X25_STATE_2, /* Awaiting Clear Confirmation */ X25_STATE_3, /* Data Transfer */ X25_STATE_4 /* Awaiting Reset Confirmation */ }; enum { X25_LINK_STATE_0, X25_LINK_STATE_1, X25_LINK_STATE_2, X25_LINK_STATE_3 }; #define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */ #define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */ #define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */ #define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */ #define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */ #define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */ #define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */ #define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */ #define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */ #define X25_SMODULUS 8 #define X25_EMODULUS 128 /* * X.25 Facilities constants. */ #define X25_FAC_CLASS_MASK 0xC0 #define X25_FAC_CLASS_A 0x00 #define X25_FAC_CLASS_B 0x40 #define X25_FAC_CLASS_C 0x80 #define X25_FAC_CLASS_D 0xC0 #define X25_FAC_REVERSE 0x01 #define X25_FAC_THROUGHPUT 0x02 #define X25_FAC_PACKET_SIZE 0x42 #define X25_FAC_WINDOW_SIZE 0x43 #define X25_MAX_FAC_LEN 20 /* Plenty to spare */ #define X25_MAX_CUD_LEN 128 /** * struct x25_route - x25 routing entry * @node - entry in x25_list_lock * @address - Start of address range * @sigdigits - Number of sig digits * @dev - More than one for MLP * @refcnt - reference counter */ struct x25_route { struct list_head node; struct x25_address address; unsigned int sigdigits; struct net_device *dev; atomic_t refcnt; }; struct x25_neigh { struct list_head node; struct net_device *dev; unsigned int state; unsigned int extended; struct sk_buff_head queue; unsigned long t20; struct timer_list t20timer; unsigned long global_facil_mask; atomic_t refcnt; }; struct x25_sock { struct sock sk; struct x25_address source_addr, dest_addr; struct x25_neigh *neighbour; unsigned int lci, cudmatchlength; unsigned char state, condition, qbitincl, intflag; unsigned short vs, vr, va, vl; unsigned long t2, t21, t22, t23; unsigned short fraglen; struct sk_buff_head ack_queue; struct sk_buff_head fragment_queue; struct sk_buff_head interrupt_in_queue; struct sk_buff_head interrupt_out_queue; struct timer_list timer; struct x25_causediag causediag; struct x25_facilities facilities; struct x25_calluserdata calluserdata; unsigned long vc_facil_mask; /* inc_call facilities mask */ }; static inline struct x25_sock *x25_sk(const struct sock *sk) { return (struct x25_sock *)sk; } /* af_x25.c */ extern int sysctl_x25_restart_request_timeout; extern int sysctl_x25_call_request_timeout; extern int sysctl_x25_reset_request_timeout; extern int sysctl_x25_clear_request_timeout; extern int sysctl_x25_ack_holdback_timeout; extern int x25_addr_ntoa(unsigned char *, struct x25_address *, struct x25_address *); extern int x25_addr_aton(unsigned char *, struct x25_address *, struct x25_address *); extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); extern void x25_destroy_socket(struct sock *); extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); extern void x25_kill_by_neigh(struct x25_neigh *); /* x25_dev.c */ extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); extern void x25_establish_link(struct x25_neigh *); extern void x25_terminate_link(struct x25_neigh *); /* x25_facilities.c */ extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *); extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long); extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *); extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); /* x25_in.c */ extern int x25_process_rx_frame(struct sock *, struct sk_buff *); extern int x25_backlog_rcv(struct sock *, struct sk_buff *); /* x25_link.c */ extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); extern void x25_link_device_up(struct net_device *); extern void x25_link_device_down(struct net_device *); extern void x25_link_established(struct x25_neigh *); extern void x25_link_terminated(struct x25_neigh *); extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); extern int x25_subscr_ioctl(unsigned int, void __user *); extern struct x25_neigh *x25_get_neigh(struct net_device *); extern void x25_link_free(void); /* x25_neigh.c */ static __inline__ void x25_neigh_hold(struct x25_neigh *nb) { atomic_inc(&nb->refcnt); } static __inline__ void x25_neigh_put(struct x25_neigh *nb) { if (atomic_dec_and_test(&nb->refcnt)) kfree(nb); } /* x25_out.c */ extern int x25_output(struct sock *, struct sk_buff *); extern void x25_kick(struct sock *); extern void x25_enquiry_response(struct sock *); /* x25_route.c */ extern struct x25_route *x25_get_route(struct x25_address *addr); extern struct net_device *x25_dev_get(char *); extern void x25_route_device_down(struct net_device *dev); extern int x25_route_ioctl(unsigned int, void __user *); extern void x25_route_free(void); static __inline__ void x25_route_hold(struct x25_route *rt) { atomic_inc(&rt->refcnt); } static __inline__ void x25_route_put(struct x25_route *rt) { if (atomic_dec_and_test(&rt->refcnt)) kfree(rt); } /* x25_subr.c */ extern void x25_clear_queues(struct sock *); extern void x25_frames_acked(struct sock *, unsigned short); extern void x25_requeue_frames(struct sock *); extern int x25_validate_nr(struct sock *, unsigned short); extern void x25_write_internal(struct sock *, int); extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); /* x25_timer.c */ extern void x25_start_heartbeat(struct sock *); extern void x25_start_t2timer(struct sock *); extern void x25_start_t21timer(struct sock *); extern void x25_start_t22timer(struct sock *); extern void x25_start_t23timer(struct sock *); extern void x25_stop_heartbeat(struct sock *); extern void x25_stop_timer(struct sock *); extern unsigned long x25_display_timer(struct sock *); extern void x25_check_rbuf(struct sock *); /* sysctl_net_x25.c */ extern void x25_register_sysctl(void); extern void x25_unregister_sysctl(void); struct x25_skb_cb { unsigned flags; }; #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) extern struct hlist_head x25_list; extern rwlock_t x25_list_lock; extern struct list_head x25_route_list; extern rwlock_t x25_route_list_lock; extern int x25_proc_init(void); extern void x25_proc_exit(void); #endif