forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
327 lines
9.5 KiB
327 lines
9.5 KiB
/* 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
|
|
|