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 14#define X25_ADDR_LEN 16 15 16#define X25_MAX_L2_LEN 18 /* 802.2 LLC */ 17 18#define X25_STD_MIN_LEN 3 19#define X25_EXT_MIN_LEN 4 20 21#define X25_GFI_SEQ_MASK 0x30 22#define X25_GFI_STDSEQ 0x10 23#define X25_GFI_EXTSEQ 0x20 24 25#define X25_Q_BIT 0x80 26#define X25_D_BIT 0x40 27#define X25_STD_M_BIT 0x10 28#define X25_EXT_M_BIT 0x01 29 30#define X25_CALL_REQUEST 0x0B 31#define X25_CALL_ACCEPTED 0x0F 32#define X25_CLEAR_REQUEST 0x13 33#define X25_CLEAR_CONFIRMATION 0x17 34#define X25_DATA 0x00 35#define X25_INTERRUPT 0x23 36#define X25_INTERRUPT_CONFIRMATION 0x27 37#define X25_RR 0x01 38#define X25_RNR 0x05 39#define X25_REJ 0x09 40#define X25_RESET_REQUEST 0x1B 41#define X25_RESET_CONFIRMATION 0x1F 42#define X25_REGISTRATION_REQUEST 0xF3 43#define X25_REGISTRATION_CONFIRMATION 0xF7 44#define X25_RESTART_REQUEST 0xFB 45#define X25_RESTART_CONFIRMATION 0xFF 46#define X25_DIAGNOSTIC 0xF1 47#define X25_ILLEGAL 0xFD 48 49/* Define the various conditions that may exist */ 50 51#define X25_COND_ACK_PENDING 0x01 52#define X25_COND_OWN_RX_BUSY 0x02 53#define X25_COND_PEER_RX_BUSY 0x04 54 55/* Define Link State constants. */ 56enum { 57 X25_STATE_0, /* Ready */ 58 X25_STATE_1, /* Awaiting Call Accepted */ 59 X25_STATE_2, /* Awaiting Clear Confirmation */ 60 X25_STATE_3, /* Data Transfer */ 61 X25_STATE_4 /* Awaiting Reset Confirmation */ 62}; 63 64enum { 65 X25_LINK_STATE_0, 66 X25_LINK_STATE_1, 67 X25_LINK_STATE_2, 68 X25_LINK_STATE_3 69}; 70 71#define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */ 72#define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */ 73#define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */ 74#define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */ 75#define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */ 76 77#define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */ 78#define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */ 79#define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */ 80#define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */ 81 82#define X25_SMODULUS 8 83#define X25_EMODULUS 128 84 85/* 86 * X.25 Facilities constants. 87 */ 88 89#define X25_FAC_CLASS_MASK 0xC0 90 91#define X25_FAC_CLASS_A 0x00 92#define X25_FAC_CLASS_B 0x40 93#define X25_FAC_CLASS_C 0x80 94#define X25_FAC_CLASS_D 0xC0 95 96#define X25_FAC_REVERSE 0x01 97#define X25_FAC_THROUGHPUT 0x02 98#define X25_FAC_PACKET_SIZE 0x42 99#define X25_FAC_WINDOW_SIZE 0x43 100 101#define X25_MAX_FAC_LEN 20 /* Plenty to spare */ 102#define X25_MAX_CUD_LEN 128 103 104struct x25_route { 105 struct x25_route *next; 106 x25_address address; /* Start of address range */ 107 unsigned int sigdigits; /* Number of sig digits */ 108 struct net_device *dev; /* More than one for MLP */ 109}; 110 111struct x25_neigh { 112 struct x25_neigh *next; 113 struct net_device *dev; 114 unsigned int state; 115 unsigned int extended; 116 struct sk_buff_head queue; 117 unsigned long t20; 118 struct timer_list t20timer; 119 unsigned long global_facil_mask; 120}; 121 122typedef struct { 123 x25_address source_addr, dest_addr; 124 struct x25_neigh *neighbour; 125 unsigned int lci; 126 unsigned char state, condition, qbitincl, intflag; 127 unsigned short vs, vr, va, vl; 128 unsigned long t2, t21, t22, t23; 129 unsigned short fraglen; 130 struct sk_buff_head ack_queue; 131 struct sk_buff_head fragment_queue; 132 struct sk_buff_head interrupt_in_queue; 133 struct sk_buff_head interrupt_out_queue; 134 struct sock *sk; /* Backlink to socket */ 135 struct timer_list timer; 136 struct x25_causediag causediag; 137 struct x25_facilities facilities; 138 struct x25_calluserdata calluserdata; 139 unsigned long vc_facil_mask; /* inc_call facilities mask */ 140} x25_cb; 141 142/* af_x25.c */ 143extern int sysctl_x25_restart_request_timeout; 144extern int sysctl_x25_call_request_timeout; 145extern int sysctl_x25_reset_request_timeout; 146extern int sysctl_x25_clear_request_timeout; 147extern int sysctl_x25_ack_holdback_timeout; 148 149extern int x25_addr_ntoa(unsigned char *, x25_address *, x25_address *); 150extern int x25_addr_aton(unsigned char *, x25_address *, x25_address *); 151extern unsigned int x25_new_lci(struct x25_neigh *); 152extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 153extern void x25_destroy_socket(struct sock *); 154extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 155extern void x25_kill_by_neigh(struct x25_neigh *); 156 157/* x25_dev.c */ 158extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 159extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); 160extern int x25_llc_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); 161extern void x25_establish_link(struct x25_neigh *); 162extern void x25_terminate_link(struct x25_neigh *); 163 164/* x25_facilities.c */ 165extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *); 166extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long); 167extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *); 168extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 169 170/* x25_in.c */ 171extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 172extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 173 174/* x25_link.c */ 175extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 176extern void x25_link_device_up(struct net_device *); 177extern void x25_link_device_down(struct net_device *); 178extern void x25_link_established(struct x25_neigh *); 179extern void x25_link_terminated(struct x25_neigh *); 180extern void x25_transmit_restart_request(struct x25_neigh *); 181extern void x25_transmit_restart_confirmation(struct x25_neigh *); 182extern void x25_transmit_diagnostic(struct x25_neigh *, unsigned char); 183extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 184extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 185extern int x25_subscr_ioctl(unsigned int, void *); 186extern struct x25_neigh *x25_get_neigh(struct net_device *); 187extern void x25_link_free(void); 188 189/* x25_out.c */ 190extern int x25_output(struct sock *, struct sk_buff *); 191extern void x25_kick(struct sock *); 192extern void x25_enquiry_response(struct sock *); 193 194/* x25_route.c */ 195extern struct net_device *x25_get_route(x25_address *); 196extern struct net_device *x25_dev_get(char *); 197extern void x25_route_device_down(struct net_device *); 198extern int x25_route_ioctl(unsigned int, void *); 199extern int x25_routes_get_info(char *, char **, off_t, int); 200extern void x25_route_free(void); 201 202/* x25_subr.c */ 203extern void x25_clear_queues(struct sock *); 204extern void x25_frames_acked(struct sock *, unsigned short); 205extern void x25_requeue_frames(struct sock *); 206extern int x25_validate_nr(struct sock *, unsigned short); 207extern void x25_write_internal(struct sock *, int); 208extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 209extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 210 211/* x25_timer.c */ 212extern void x25_start_heartbeat(struct sock *); 213extern void x25_start_t2timer(struct sock *); 214extern void x25_start_t21timer(struct sock *); 215extern void x25_start_t22timer(struct sock *); 216extern void x25_start_t23timer(struct sock *); 217extern void x25_stop_heartbeat(struct sock *); 218extern void x25_stop_timer(struct sock *); 219extern unsigned long x25_display_timer(struct sock *); 220extern void x25_check_rbuf(struct sock *); 221 222/* sysctl_net_x25.c */ 223extern void x25_register_sysctl(void); 224extern void x25_unregister_sysctl(void); 225struct x25_skb_cb { 226 unsigned flags; 227}; 228#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 229#endif 230