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Diffstat (limited to 'include/net/x25.h')
| -rw-r--r-- | include/net/x25.h | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/include/net/x25.h b/include/net/x25.h new file mode 100644 index 000000000..d7d6c2b4f --- /dev/null +++ b/include/net/x25.h @@ -0,0 +1,327 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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 <linux/x25.h> +#include <linux/slab.h> +#include <linux/refcount.h> +#include <net/sock.h> + +#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 */ + X25_STATE_5 /* Call Accepted / Call Connected pending */ +}; + +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 /* also fast select */ +#define X25_FAC_THROUGHPUT 0x02 +#define X25_FAC_PACKET_SIZE 0x42 +#define X25_FAC_WINDOW_SIZE 0x43 + +#define X25_MAX_FAC_LEN 60 +#define X25_MAX_CUD_LEN 128 + +#define X25_FAC_CALLING_AE 0xCB +#define X25_FAC_CALLED_AE 0xC9 + +#define X25_MARKER 0x00 +#define X25_DTE_SERVICES 0x0F +#define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */ +#define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */ + +/* Bitset in x25_sock->flags for misc flags */ +#define X25_Q_BIT_FLAG 0 +#define X25_INTERRUPT_FLAG 1 +#define X25_ACCPT_APPRV_FLAG 2 + +/** + * 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; + refcount_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; + refcount_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; + unsigned short vs, vr, va, vl; + unsigned long t2, t21, t22, t23; + unsigned short fraglen; + unsigned long flags; + 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_dte_facilities dte_facilities; + struct x25_calluserdata calluserdata; + unsigned long vc_facil_mask; /* inc_call facilities mask */ +}; + +struct x25_forward { + struct list_head node; + unsigned int lci; + struct net_device *dev1; + struct net_device *dev2; + atomic_t refcnt; +}; + +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 sysctl_x25_forward; + +int x25_parse_address_block(struct sk_buff *skb, + struct x25_address *called_addr, + struct x25_address *calling_addr); + +int x25_addr_ntoa(unsigned char *, struct x25_address *, struct x25_address *); +int x25_addr_aton(unsigned char *, struct x25_address *, struct x25_address *); +struct sock *x25_find_socket(unsigned int, struct x25_neigh *); +void x25_destroy_socket_from_timer(struct sock *); +int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); +void x25_kill_by_neigh(struct x25_neigh *); + +/* x25_dev.c */ +void x25_send_frame(struct sk_buff *, struct x25_neigh *); +int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, + struct packet_type *, struct net_device *); +void x25_establish_link(struct x25_neigh *); +void x25_terminate_link(struct x25_neigh *); + +/* x25_facilities.c */ +int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, + struct x25_dte_facilities *, unsigned long *); +int x25_create_facilities(unsigned char *, struct x25_facilities *, + struct x25_dte_facilities *, unsigned long); +int x25_negotiate_facilities(struct sk_buff *, struct sock *, + struct x25_facilities *, + struct x25_dte_facilities *); +void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); + +/* x25_forward.c */ +void x25_clear_forward_by_lci(unsigned int lci); +void x25_clear_forward_by_dev(struct net_device *); +int x25_forward_data(int, struct x25_neigh *, struct sk_buff *); +int x25_forward_call(struct x25_address *, struct x25_neigh *, struct sk_buff *, + int); + +/* x25_in.c */ +int x25_process_rx_frame(struct sock *, struct sk_buff *); +int x25_backlog_rcv(struct sock *, struct sk_buff *); + +/* x25_link.c */ +void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); +void x25_link_device_up(struct net_device *); +void x25_link_device_down(struct net_device *); +void x25_link_established(struct x25_neigh *); +void x25_link_terminated(struct x25_neigh *); +void x25_transmit_clear_request(struct x25_neigh *, unsigned int, + unsigned char); +void x25_transmit_link(struct sk_buff *, struct x25_neigh *); +int x25_subscr_ioctl(unsigned int, void __user *); +struct x25_neigh *x25_get_neigh(struct net_device *); +void x25_link_free(void); + +/* x25_neigh.c */ +static __inline__ void x25_neigh_hold(struct x25_neigh *nb) +{ + refcount_inc(&nb->refcnt); +} + +static __inline__ void x25_neigh_put(struct x25_neigh *nb) +{ + if (refcount_dec_and_test(&nb->refcnt)) + kfree(nb); +} + +/* x25_out.c */ +int x25_output(struct sock *, struct sk_buff *); +void x25_kick(struct sock *); +void x25_enquiry_response(struct sock *); + +/* x25_route.c */ +struct x25_route *x25_get_route(struct x25_address *addr); +struct net_device *x25_dev_get(char *); +void x25_route_device_down(struct net_device *dev); +int x25_route_ioctl(unsigned int, void __user *); +void x25_route_free(void); + +static __inline__ void x25_route_hold(struct x25_route *rt) +{ + refcount_inc(&rt->refcnt); +} + +static __inline__ void x25_route_put(struct x25_route *rt) +{ + if (refcount_dec_and_test(&rt->refcnt)) + kfree(rt); +} + +/* x25_subr.c */ +void x25_clear_queues(struct sock *); +void x25_frames_acked(struct sock *, unsigned short); +void x25_requeue_frames(struct sock *); +int x25_validate_nr(struct sock *, unsigned short); +void x25_write_internal(struct sock *, int); +int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, + int *); +void x25_disconnect(struct sock *, int, unsigned char, unsigned char); + +/* x25_timer.c */ +void x25_init_timers(struct sock *sk); +void x25_start_heartbeat(struct sock *); +void x25_start_t2timer(struct sock *); +void x25_start_t21timer(struct sock *); +void x25_start_t22timer(struct sock *); +void x25_start_t23timer(struct sock *); +void x25_stop_heartbeat(struct sock *); +void x25_stop_timer(struct sock *); +unsigned long x25_display_timer(struct sock *); +void x25_check_rbuf(struct sock *); + +/* sysctl_net_x25.c */ +#ifdef CONFIG_SYSCTL +int x25_register_sysctl(void); +void x25_unregister_sysctl(void); +#else +static inline int x25_register_sysctl(void) { return 0; }; +static inline void x25_unregister_sysctl(void) {}; +#endif /* CONFIG_SYSCTL */ + +struct x25_skb_cb { + unsigned int 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 struct list_head x25_forward_list; +extern rwlock_t x25_forward_list_lock; +extern struct list_head x25_neigh_list; +extern rwlock_t x25_neigh_list_lock; + +int x25_proc_init(void); +void x25_proc_exit(void); +#endif |