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. */ 56 enum { 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 64 enum { 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 128 103 104 struct 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 }; 110 111 struct 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 }; 121 122 typedef 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 */ 143 extern int sysctl_x25_restart_request_timeout; 144 extern int sysctl_x25_call_request_timeout; 145 extern int sysctl_x25_reset_request_timeout; 146 extern int sysctl_x25_clear_request_timeout; 147 extern int sysctl_x25_ack_holdback_timeout; 148 149 extern int x25_addr_ntoa(unsigned char *, x25_address *, x25_address *); 150 extern int x25_addr_aton(unsigned char *, x25_address *, x25_address *); 151 extern unsigned int x25_new_lci(struct x25_neigh *); 152 extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 153 extern void x25_destroy_socket(struct sock *); 154 extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 155 extern void x25_kill_by_neigh(struct x25_neigh *); 156 157 /* x25_dev.c */ 158 extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 159 extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); 160 extern int x25_llc_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); 161 extern void x25_establish_link(struct x25_neigh *); 162 extern void x25_terminate_link(struct x25_neigh *); 163 164 /* x25_facilities.c */ 165 extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *); 166 extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long); 167 extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *); 168 extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 169 170 /* x25_in.c */ 171 extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 172 extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 173 174 /* x25_link.c */ 175 extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 176 extern void x25_link_device_up(struct net_device *); 177 extern void x25_link_device_down(struct net_device *); 178 extern void x25_link_established(struct x25_neigh *); 179 extern void x25_link_terminated(struct x25_neigh *); 180 extern void x25_transmit_restart_request(struct x25_neigh *); 181 extern void x25_transmit_restart_confirmation(struct x25_neigh *); 182 extern void x25_transmit_diagnostic(struct x25_neigh *, unsigned char); 183 extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 184 extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 185 extern int x25_subscr_ioctl(unsigned int, void *); 186 extern struct x25_neigh *x25_get_neigh(struct net_device *); 187 extern void x25_link_free(void); 188 189 /* x25_out.c */ 190 extern int x25_output(struct sock *, struct sk_buff *); 191 extern void x25_kick(struct sock *); 192 extern void x25_enquiry_response(struct sock *); 193 194 /* x25_route.c */ 195 extern struct net_device *x25_get_route(x25_address *); 196 extern struct net_device *x25_dev_get(char *); 197 extern void x25_route_device_down(struct net_device *); 198 extern int x25_route_ioctl(unsigned int, void *); 199 extern int x25_routes_get_info(char *, char **, off_t, int); 200 extern void x25_route_free(void); 201 202 /* x25_subr.c */ 203 extern void x25_clear_queues(struct sock *); 204 extern void x25_frames_acked(struct sock *, unsigned short); 205 extern void x25_requeue_frames(struct sock *); 206 extern int x25_validate_nr(struct sock *, unsigned short); 207 extern void x25_write_internal(struct sock *, int); 208 extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 209 extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 210 211 /* x25_timer.c */ 212 extern void x25_start_heartbeat(struct sock *); 213 extern void x25_start_t2timer(struct sock *); 214 extern void x25_start_t21timer(struct sock *); 215 extern void x25_start_t22timer(struct sock *); 216 extern void x25_start_t23timer(struct sock *); 217 extern void x25_stop_heartbeat(struct sock *); 218 extern void x25_stop_timer(struct sock *); 219 extern unsigned long x25_display_timer(struct sock *); 220 extern void x25_check_rbuf(struct sock *); 221 222 /* sysctl_net_x25.c */ 223 extern void x25_register_sysctl(void); 224 extern void x25_unregister_sysctl(void); 225 struct x25_skb_cb { 226 unsigned flags; 227 }; 228 #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 229 #endif 230