--- /dev/null
+/*
+ * 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 <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 */
+};
+
+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;
+ 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;
+ 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)
+{
+ 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 */
+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)
+{
+ 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 */
+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
+void x25_register_sysctl(void);
+void x25_unregister_sysctl(void);
+#else
+static inline void x25_register_sysctl(void) {};
+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
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