1 /* 2 * Declarations of AX.25 type objects. 3 * 4 * Alan Cox (GW4PTS) 10/11/93 5 */ 6 #ifndef _AX25_H 7 #define _AX25_H 8 9 #include <linux/config.h> 10 #include <linux/ax25.h> 11 #include <linux/spinlock.h> 12 #include <linux/timer.h> 13 #include <linux/list.h> 14 #include <asm/atomic.h> 15 16 #define AX25_T1CLAMPLO 1 17 #define AX25_T1CLAMPHI (30 * HZ) 18 19 #define AX25_BPQ_HEADER_LEN 16 20 #define AX25_KISS_HEADER_LEN 1 21 22 #define AX25_HEADER_LEN 17 23 #define AX25_ADDR_LEN 7 24 #define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN) 25 #define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN) 26 27 /* AX.25 Protocol IDs */ 28 #define AX25_P_ROSE 0x01 29 #define AX25_P_IP 0xCC 30 #define AX25_P_ARP 0xCD 31 #define AX25_P_TEXT 0xF0 32 #define AX25_P_NETROM 0xCF 33 #define AX25_P_SEGMENT 0x08 34 35 /* AX.25 Segment control values */ 36 #define AX25_SEG_REM 0x7F 37 #define AX25_SEG_FIRST 0x80 38 39 #define AX25_CBIT 0x80 /* Command/Response bit */ 40 #define AX25_EBIT 0x01 /* HDLC Address Extension bit */ 41 #define AX25_HBIT 0x80 /* Has been repeated bit */ 42 43 #define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */ 44 #define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */ 45 #define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */ 46 47 #define AX25_COND_ACK_PENDING 0x01 48 #define AX25_COND_REJECT 0x02 49 #define AX25_COND_PEER_RX_BUSY 0x04 50 #define AX25_COND_OWN_RX_BUSY 0x08 51 #define AX25_COND_DAMA_MODE 0x10 52 53 #ifndef _LINUX_NETDEVICE_H 54 #include <linux/netdevice.h> 55 #endif 56 57 /* Upper sub-layer (LAPB) definitions */ 58 59 /* Control field templates */ 60 #define AX25_I 0x00 /* Information frames */ 61 #define AX25_S 0x01 /* Supervisory frames */ 62 #define AX25_RR 0x01 /* Receiver ready */ 63 #define AX25_RNR 0x05 /* Receiver not ready */ 64 #define AX25_REJ 0x09 /* Reject */ 65 #define AX25_U 0x03 /* Unnumbered frames */ 66 #define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */ 67 #define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */ 68 #define AX25_DISC 0x43 /* Disconnect */ 69 #define AX25_DM 0x0f /* Disconnected mode */ 70 #define AX25_UA 0x63 /* Unnumbered acknowledge */ 71 #define AX25_FRMR 0x87 /* Frame reject */ 72 #define AX25_UI 0x03 /* Unnumbered information */ 73 #define AX25_XID 0xaf /* Exchange information */ 74 #define AX25_TEST 0xe3 /* Test */ 75 76 #define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */ 77 #define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */ 78 79 #define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */ 80 81 #define AX25_POLLOFF 0 82 #define AX25_POLLON 1 83 84 /* AX25 L2 C-bit */ 85 #define AX25_COMMAND 1 86 #define AX25_RESPONSE 2 87 88 /* Define Link State constants. */ 89 90 enum { 91 AX25_STATE_0, 92 AX25_STATE_1, 93 AX25_STATE_2, 94 AX25_STATE_3, 95 AX25_STATE_4 96 }; 97 98 #define AX25_MODULUS 8 /* Standard AX.25 modulus */ 99 #define AX25_EMODULUS 128 /* Extended AX.25 modulus */ 100 101 enum { 102 AX25_PROTO_STD_SIMPLEX, 103 AX25_PROTO_STD_DUPLEX, 104 AX25_PROTO_DAMA_SLAVE, 105 AX25_PROTO_DAMA_MASTER 106 }; 107 108 enum { 109 AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */ 110 AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */ 111 AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */ 112 AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */ 113 AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */ 114 AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */ 115 AX25_VALUES_T1, /* Default T1 timeout value */ 116 AX25_VALUES_T2, /* Default T2 timeout value */ 117 AX25_VALUES_T3, /* Default T3 timeout value */ 118 AX25_VALUES_IDLE, /* Connected mode idle timer */ 119 AX25_VALUES_N2, /* Default N2 value */ 120 AX25_VALUES_PACLEN, /* AX.25 MTU */ 121 AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */ 122 AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */ 123 AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ 124 }; 125 126 #define AX25_DEF_IPDEFMODE 0 /* Datagram */ 127 #define AX25_DEF_AXDEFMODE 0 /* Normal */ 128 #define AX25_DEF_BACKOFF 1 /* Linear backoff */ 129 #define AX25_DEF_CONMODE 2 /* Connected mode allowed */ 130 #define AX25_DEF_WINDOW 2 /* Window=2 */ 131 #define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */ 132 #define AX25_DEF_T1 (10 * HZ) /* T1=10s */ 133 #define AX25_DEF_T2 (3 * HZ) /* T2=3s */ 134 #define AX25_DEF_T3 (300 * HZ) /* T3=300s */ 135 #define AX25_DEF_N2 10 /* N2=10 */ 136 #define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */ 137 #define AX25_DEF_PACLEN 256 /* Paclen=256 */ 138 #define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */ 139 #define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */ 140 141 typedef struct ax25_uid_assoc { 142 struct ax25_uid_assoc *next; 143 uid_t uid; 144 ax25_address call; 145 } ax25_uid_assoc; 146 147 typedef struct { 148 ax25_address calls[AX25_MAX_DIGIS]; 149 unsigned char repeated[AX25_MAX_DIGIS]; 150 unsigned char ndigi; 151 char lastrepeat; 152 } ax25_digi; 153 154 typedef struct ax25_route { 155 struct ax25_route *next; 156 atomic_t ref; 157 ax25_address callsign; 158 struct net_device *dev; 159 ax25_digi *digipeat; 160 char ip_mode; 161 struct timer_list timer; 162 } ax25_route; 163 164 typedef struct { 165 char slave; /* slave_mode? */ 166 struct timer_list slave_timer; /* timeout timer */ 167 unsigned short slave_timeout; /* when? */ 168 } ax25_dama_info; 169 170 struct ctl_table; 171 172 typedef struct ax25_dev { 173 struct ax25_dev *next; 174 struct net_device *dev; 175 struct net_device *forward; 176 struct ctl_table *systable; 177 int values[AX25_MAX_VALUES]; 178 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) 179 ax25_dama_info dama; 180 #endif 181 } ax25_dev; 182 183 typedef struct ax25_cb { 184 struct hlist_node ax25_node; 185 ax25_address source_addr, dest_addr; 186 ax25_digi *digipeat; 187 ax25_dev *ax25_dev; 188 unsigned char iamdigi; 189 unsigned char state, modulus, pidincl; 190 unsigned short vs, vr, va; 191 unsigned char condition, backoff; 192 unsigned char n2, n2count; 193 struct timer_list t1timer, t2timer, t3timer, idletimer; 194 unsigned long t1, t2, t3, idle, rtt; 195 unsigned short paclen, fragno, fraglen; 196 struct sk_buff_head write_queue; 197 struct sk_buff_head reseq_queue; 198 struct sk_buff_head ack_queue; 199 struct sk_buff_head frag_queue; 200 unsigned char window; 201 struct timer_list timer, dtimer; 202 struct sock *sk; /* Backlink to socket */ 203 atomic_t refcount; 204 } ax25_cb; 205 206 #define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo) 207 208 #define ax25_for_each(__ax25, node, list) \ 209 hlist_for_each_entry(__ax25, node, list, ax25_node) 210 211 #define ax25_cb_hold(__ax25) \ 212 atomic_inc(&((__ax25)->refcount)) 213 214 static __inline__ void ax25_cb_put(ax25_cb *ax25) 215 { 216 if (atomic_dec_and_test(&ax25->refcount)) { 217 if (ax25->digipeat) 218 kfree(ax25->digipeat); 219 kfree(ax25); 220 } 221 } 222 223 /* af_ax25.c */ 224 extern struct hlist_head ax25_list; 225 extern spinlock_t ax25_list_lock; 226 extern void ax25_cb_add(ax25_cb *); 227 struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int); 228 struct sock *ax25_get_socket(ax25_address *, ax25_address *, int); 229 extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *); 230 extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int); 231 extern void ax25_destroy_socket(ax25_cb *); 232 extern ax25_cb *ax25_create_cb(void); 233 extern void ax25_fillin_cb(ax25_cb *, ax25_dev *); 234 extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *); 235 236 /* ax25_addr.c */ 237 extern ax25_address null_ax25_address; 238 extern char *ax2asc(ax25_address *); 239 extern ax25_address *asc2ax(char *); 240 extern int ax25cmp(ax25_address *, ax25_address *); 241 extern int ax25digicmp(ax25_digi *, ax25_digi *); 242 extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *); 243 extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int); 244 extern int ax25_addr_size(ax25_digi *); 245 extern void ax25_digi_invert(ax25_digi *, ax25_digi *); 246 247 /* ax25_dev.c */ 248 extern ax25_dev *ax25_dev_list; 249 extern spinlock_t ax25_dev_lock; 250 251 static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev) 252 { 253 return dev->ax25_ptr; 254 } 255 256 extern ax25_dev *ax25_addr_ax25dev(ax25_address *); 257 extern void ax25_dev_device_up(struct net_device *); 258 extern void ax25_dev_device_down(struct net_device *); 259 extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); 260 extern struct net_device *ax25_fwd_dev(struct net_device *); 261 extern void ax25_dev_free(void); 262 263 /* ax25_ds_in.c */ 264 extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int); 265 266 /* ax25_ds_subr.c */ 267 extern void ax25_ds_nr_error_recovery(ax25_cb *); 268 extern void ax25_ds_enquiry_response(ax25_cb *); 269 extern void ax25_ds_establish_data_link(ax25_cb *); 270 extern void ax25_dev_dama_off(ax25_dev *); 271 extern void ax25_dama_on(ax25_cb *); 272 extern void ax25_dama_off(ax25_cb *); 273 274 /* ax25_ds_timer.c */ 275 extern void ax25_ds_set_timer(ax25_dev *); 276 extern void ax25_ds_del_timer(ax25_dev *); 277 extern void ax25_ds_timer(ax25_cb *); 278 extern void ax25_ds_t1_timeout(ax25_cb *); 279 extern void ax25_ds_heartbeat_expiry(ax25_cb *); 280 extern void ax25_ds_t3timer_expiry(ax25_cb *); 281 extern void ax25_ds_idletimer_expiry(ax25_cb *); 282 283 /* ax25_iface.c */ 284 extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *)); 285 extern void ax25_protocol_release(unsigned int); 286 extern int ax25_linkfail_register(void (*)(ax25_cb *, int)); 287 extern void ax25_linkfail_release(void (*)(ax25_cb *, int)); 288 extern int ax25_listen_register(ax25_address *, struct net_device *); 289 extern void ax25_listen_release(ax25_address *, struct net_device *); 290 extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); 291 extern int ax25_listen_mine(ax25_address *, struct net_device *); 292 extern void ax25_link_failed(ax25_cb *, int); 293 extern int ax25_protocol_is_registered(unsigned int); 294 295 /* ax25_in.c */ 296 extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); 297 extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *); 298 299 /* ax25_ip.c */ 300 extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); 301 extern int ax25_rebuild_header(struct sk_buff *); 302 303 /* ax25_out.c */ 304 extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *); 305 extern void ax25_output(ax25_cb *, int, struct sk_buff *); 306 extern void ax25_kick(ax25_cb *); 307 extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int); 308 extern void ax25_queue_xmit(struct sk_buff *); 309 extern int ax25_check_iframes_acked(ax25_cb *, unsigned short); 310 311 /* ax25_route.c */ 312 extern void ax25_rt_device_down(struct net_device *); 313 extern int ax25_rt_ioctl(unsigned int, void __user *); 314 extern struct file_operations ax25_route_fops; 315 extern int ax25_rt_autobind(ax25_cb *, ax25_address *); 316 extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *, 317 struct net_device *); 318 extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); 319 extern void ax25_rt_free(void); 320 321 static inline void ax25_put_route(ax25_route *ax25_rt) 322 { 323 atomic_dec(&ax25_rt->ref); 324 } 325 326 /* ax25_std_in.c */ 327 extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int); 328 329 /* ax25_std_subr.c */ 330 extern void ax25_std_nr_error_recovery(ax25_cb *); 331 extern void ax25_std_establish_data_link(ax25_cb *); 332 extern void ax25_std_transmit_enquiry(ax25_cb *); 333 extern void ax25_std_enquiry_response(ax25_cb *); 334 extern void ax25_std_timeout_response(ax25_cb *); 335 336 /* ax25_std_timer.c */ 337 extern void ax25_std_heartbeat_expiry(ax25_cb *); 338 extern void ax25_std_t1timer_expiry(ax25_cb *); 339 extern void ax25_std_t2timer_expiry(ax25_cb *); 340 extern void ax25_std_t3timer_expiry(ax25_cb *); 341 extern void ax25_std_idletimer_expiry(ax25_cb *); 342 343 /* ax25_subr.c */ 344 extern void ax25_clear_queues(ax25_cb *); 345 extern void ax25_frames_acked(ax25_cb *, unsigned short); 346 extern void ax25_requeue_frames(ax25_cb *); 347 extern int ax25_validate_nr(ax25_cb *, unsigned short); 348 extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *); 349 extern void ax25_send_control(ax25_cb *, int, int, int); 350 extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *); 351 extern void ax25_calculate_t1(ax25_cb *); 352 extern void ax25_calculate_rtt(ax25_cb *); 353 extern void ax25_disconnect(ax25_cb *, int); 354 355 /* ax25_timer.c */ 356 extern void ax25_start_heartbeat(ax25_cb *); 357 extern void ax25_start_t1timer(ax25_cb *); 358 extern void ax25_start_t2timer(ax25_cb *); 359 extern void ax25_start_t3timer(ax25_cb *); 360 extern void ax25_start_idletimer(ax25_cb *); 361 extern void ax25_stop_heartbeat(ax25_cb *); 362 extern void ax25_stop_t1timer(ax25_cb *); 363 extern void ax25_stop_t2timer(ax25_cb *); 364 extern void ax25_stop_t3timer(ax25_cb *); 365 extern void ax25_stop_idletimer(ax25_cb *); 366 extern int ax25_t1timer_running(ax25_cb *); 367 extern unsigned long ax25_display_timer(struct timer_list *); 368 369 /* ax25_uid.c */ 370 extern int ax25_uid_policy; 371 extern ax25_address *ax25_findbyuid(uid_t); 372 extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *); 373 extern struct file_operations ax25_uid_fops; 374 extern void ax25_uid_free(void); 375 376 /* sysctl_net_ax25.c */ 377 #ifdef CONFIG_SYSCTL 378 extern void ax25_register_sysctl(void); 379 extern void ax25_unregister_sysctl(void); 380 #else 381 static inline void ax25_register_sysctl(void) {}; 382 static inline void ax25_unregister_sysctl(void) {}; 383 #endif /* CONFIG_SYSCTL */ 384 385 #endif 386