1/* 2 * Declarations of AX.25 type objects. 3 * 4 * Alan Cox (GW4PTS) 10/11/93 5 */ 6 7#ifndef _AX25_H 8#define _AX25_H 9#include <linux/config.h> 10#include <linux/ax25.h> 11 12#define AX25_T1CLAMPLO 1 13#define AX25_T1CLAMPHI (30 * HZ) 14 15#define AX25_BPQ_HEADER_LEN 16 16#define AX25_KISS_HEADER_LEN 1 17 18#define AX25_HEADER_LEN 17 19#define AX25_ADDR_LEN 7 20#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN) 21#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN) 22 23/* AX.25 Protocol IDs */ 24#define AX25_P_ROSE 0x01 25#define AX25_P_IP 0xCC 26#define AX25_P_ARP 0xCD 27#define AX25_P_TEXT 0xF0 28#define AX25_P_NETROM 0xCF 29#define AX25_P_SEGMENT 0x08 30 31/* AX.25 Segment control values */ 32#define AX25_SEG_REM 0x7F 33#define AX25_SEG_FIRST 0x80 34 35#define AX25_CBIT 0x80 /* Command/Response bit */ 36#define AX25_EBIT 0x01 /* HDLC Address Extension bit */ 37#define AX25_HBIT 0x80 /* Has been repeated bit */ 38 39#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */ 40#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */ 41#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */ 42 43#define AX25_COND_ACK_PENDING 0x01 44#define AX25_COND_REJECT 0x02 45#define AX25_COND_PEER_RX_BUSY 0x04 46#define AX25_COND_OWN_RX_BUSY 0x08 47#define AX25_COND_DAMA_MODE 0x10 48 49#ifndef _LINUX_NETDEVICE_H 50#include <linux/netdevice.h> 51#endif 52 53/* Upper sub-layer (LAPB) definitions */ 54 55/* Control field templates */ 56#define AX25_I 0x00 /* Information frames */ 57#define AX25_S 0x01 /* Supervisory frames */ 58#define AX25_RR 0x01 /* Receiver ready */ 59#define AX25_RNR 0x05 /* Receiver not ready */ 60#define AX25_REJ 0x09 /* Reject */ 61#define AX25_U 0x03 /* Unnumbered frames */ 62#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */ 63#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */ 64#define AX25_DISC 0x43 /* Disconnect */ 65#define AX25_DM 0x0f /* Disconnected mode */ 66#define AX25_UA 0x63 /* Unnumbered acknowledge */ 67#define AX25_FRMR 0x87 /* Frame reject */ 68#define AX25_UI 0x03 /* Unnumbered information */ 69 70#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */ 71#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */ 72 73#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */ 74 75#define AX25_POLLOFF 0 76#define AX25_POLLON 1 77 78/* AX25 L2 C-bit */ 79#define AX25_COMMAND 1 80#define AX25_RESPONSE 2 81 82/* Define Link State constants. */ 83 84enum { 85 AX25_STATE_0, 86 AX25_STATE_1, 87 AX25_STATE_2, 88 AX25_STATE_3, 89 AX25_STATE_4 90}; 91 92#define AX25_MODULUS 8 /* Standard AX.25 modulus */ 93#define AX25_EMODULUS 128 /* Extended AX.25 modulus */ 94 95enum { 96 AX25_PROTO_STD_SIMPLEX, 97 AX25_PROTO_STD_DUPLEX, 98 AX25_PROTO_DAMA_SLAVE, 99 AX25_PROTO_DAMA_MASTER 100}; 101 102enum { 103 AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */ 104 AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */ 105 AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */ 106 AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */ 107 AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */ 108 AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */ 109 AX25_VALUES_T1, /* Default T1 timeout value */ 110 AX25_VALUES_T2, /* Default T2 timeout value */ 111 AX25_VALUES_T3, /* Default T3 timeout value */ 112 AX25_VALUES_IDLE, /* Connected mode idle timer */ 113 AX25_VALUES_N2, /* Default N2 value */ 114 AX25_VALUES_PACLEN, /* AX.25 MTU */ 115 AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */ 116 AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */ 117 AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ 118}; 119 120#define AX25_DEF_IPDEFMODE 0 /* Datagram */ 121#define AX25_DEF_AXDEFMODE 0 /* Normal */ 122#define AX25_DEF_BACKOFF 1 /* Linear backoff */ 123#define AX25_DEF_CONMODE 2 /* Connected mode allowed */ 124#define AX25_DEF_WINDOW 2 /* Window=2 */ 125#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */ 126#define AX25_DEF_T1 (10 * HZ) /* T1=10s */ 127#define AX25_DEF_T2 (3 * HZ) /* T2=3s */ 128#define AX25_DEF_T3 (300 * HZ) /* T3=300s */ 129#define AX25_DEF_N2 10 /* N2=10 */ 130#define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */ 131#define AX25_DEF_PACLEN 256 /* Paclen=256 */ 132#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */ 133#define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */ 134 135typedef struct ax25_uid_assoc { 136 struct ax25_uid_assoc *next; 137 uid_t uid; 138 ax25_address call; 139} ax25_uid_assoc; 140 141typedef struct { 142 ax25_address calls[AX25_MAX_DIGIS]; 143 unsigned char repeated[AX25_MAX_DIGIS]; 144 unsigned char ndigi; 145 char lastrepeat; 146} ax25_digi; 147 148typedef struct ax25_route { 149 struct ax25_route *next; 150 ax25_address callsign; 151 struct net_device *dev; 152 ax25_digi *digipeat; 153 char ip_mode; 154} ax25_route; 155 156typedef struct { 157 char slave; /* slave_mode? */ 158 struct timer_list slave_timer; /* timeout timer */ 159 unsigned short slave_timeout; /* when? */ 160} ax25_dama_info; 161 162struct ctl_table; 163 164typedef struct ax25_dev { 165 struct ax25_dev *next; 166 struct net_device *dev; 167 struct net_device *forward; 168 struct ctl_table *systable; 169 int values[AX25_MAX_VALUES]; 170#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) 171 ax25_dama_info dama; 172#endif 173} ax25_dev; 174 175typedef struct ax25_cb { 176 struct ax25_cb *next; 177 ax25_address source_addr, dest_addr; 178 ax25_digi *digipeat; 179 ax25_dev *ax25_dev; 180 unsigned char iamdigi; 181 unsigned char state, modulus, pidincl; 182 unsigned short vs, vr, va; 183 unsigned char condition, backoff; 184 unsigned char n2, n2count; 185 struct timer_list t1timer, t2timer, t3timer, idletimer; 186 unsigned long t1, t2, t3, idle, rtt; 187 unsigned short paclen, fragno, fraglen; 188 struct sk_buff_head write_queue; 189 struct sk_buff_head reseq_queue; 190 struct sk_buff_head ack_queue; 191 struct sk_buff_head frag_queue; 192 unsigned char window; 193 struct timer_list timer; 194 struct sock *sk; /* Backlink to socket */ 195} ax25_cb; 196 197/* af_ax25.c */ 198extern ax25_cb *volatile ax25_list; 199extern void ax25_free_cb(ax25_cb *); 200extern void ax25_insert_socket(ax25_cb *); 201struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int); 202struct sock *ax25_find_socket(ax25_address *, ax25_address *, int); 203extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *); 204extern struct sock *ax25_addr_match(ax25_address *); 205extern void ax25_send_to_raw(struct sock *, struct sk_buff *, int); 206extern void ax25_destroy_socket(ax25_cb *); 207extern ax25_cb *ax25_create_cb(void); 208extern void ax25_fillin_cb(ax25_cb *, ax25_dev *); 209extern int ax25_create(struct socket *, int); 210extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *); 211 212/* ax25_addr.c */ 213extern ax25_address null_ax25_address; 214extern char *ax2asc(ax25_address *); 215extern ax25_address *asc2ax(char *); 216extern int ax25cmp(ax25_address *, ax25_address *); 217extern int ax25digicmp(ax25_digi *, ax25_digi *); 218extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *); 219extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int); 220extern int ax25_addr_size(ax25_digi *); 221extern void ax25_digi_invert(ax25_digi *, ax25_digi *); 222 223/* ax25_dev.c */ 224extern ax25_dev *ax25_dev_list; 225extern ax25_dev *ax25_dev_ax25dev(struct net_device *); 226extern ax25_dev *ax25_addr_ax25dev(ax25_address *); 227extern void ax25_dev_device_up(struct net_device *); 228extern void ax25_dev_device_down(struct net_device *); 229extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); 230extern struct net_device *ax25_fwd_dev(struct net_device *); 231extern void ax25_dev_free(void); 232 233/* ax25_ds_in.c */ 234extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int); 235 236/* ax25_ds_subr.c */ 237extern void ax25_ds_nr_error_recovery(ax25_cb *); 238extern void ax25_ds_enquiry_response(ax25_cb *); 239extern void ax25_ds_establish_data_link(ax25_cb *); 240extern void ax25_dev_dama_on(ax25_dev *); 241extern void ax25_dev_dama_off(ax25_dev *); 242extern void ax25_dama_on(ax25_cb *); 243extern void ax25_dama_off(ax25_cb *); 244 245/* ax25_ds_timer.c */ 246extern void ax25_ds_set_timer(ax25_dev *); 247extern void ax25_ds_del_timer(ax25_dev *); 248extern void ax25_ds_timer(ax25_cb *); 249extern void ax25_ds_t1_timeout(ax25_cb *); 250extern void ax25_ds_heartbeat_expiry(ax25_cb *); 251extern void ax25_ds_t3timer_expiry(ax25_cb *); 252extern void ax25_ds_idletimer_expiry(ax25_cb *); 253 254/* ax25_iface.c */ 255extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *)); 256extern void ax25_protocol_release(unsigned int); 257extern int ax25_linkfail_register(void (*)(ax25_cb *, int)); 258extern void ax25_linkfail_release(void (*)(ax25_cb *, int)); 259extern int ax25_listen_register(ax25_address *, struct net_device *); 260extern void ax25_listen_release(ax25_address *, struct net_device *); 261extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); 262extern int ax25_listen_mine(ax25_address *, struct net_device *); 263extern void ax25_link_failed(ax25_cb *, int); 264extern int ax25_protocol_is_registered(unsigned int); 265 266/* ax25_in.c */ 267extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); 268extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *); 269 270/* ax25_ip.c */ 271extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); 272extern int ax25_rebuild_header(struct sk_buff *); 273 274/* ax25_out.c */ 275extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *); 276extern void ax25_output(ax25_cb *, int, struct sk_buff *); 277extern void ax25_kick(ax25_cb *); 278extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int); 279extern void ax25_queue_xmit(struct sk_buff *); 280extern int ax25_check_iframes_acked(ax25_cb *, unsigned short); 281 282/* ax25_route.c */ 283extern void ax25_rt_device_down(struct net_device *); 284extern int ax25_rt_ioctl(unsigned int, void *); 285extern int ax25_rt_get_info(char *, char **, off_t, int); 286extern int ax25_rt_autobind(ax25_cb *, ax25_address *); 287extern ax25_route *ax25_rt_find_route(ax25_address *, struct net_device *); 288extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); 289extern void ax25_rt_free(void); 290 291/* ax25_std_in.c */ 292extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int); 293 294/* ax25_std_subr.c */ 295extern void ax25_std_nr_error_recovery(ax25_cb *); 296extern void ax25_std_establish_data_link(ax25_cb *); 297extern void ax25_std_transmit_enquiry(ax25_cb *); 298extern void ax25_std_enquiry_response(ax25_cb *); 299extern void ax25_std_timeout_response(ax25_cb *); 300 301/* ax25_std_timer.c */ 302extern void ax25_std_heartbeat_expiry(ax25_cb *); 303extern void ax25_std_t1timer_expiry(ax25_cb *); 304extern void ax25_std_t2timer_expiry(ax25_cb *); 305extern void ax25_std_t3timer_expiry(ax25_cb *); 306extern void ax25_std_idletimer_expiry(ax25_cb *); 307 308/* ax25_subr.c */ 309extern void ax25_clear_queues(ax25_cb *); 310extern void ax25_frames_acked(ax25_cb *, unsigned short); 311extern void ax25_requeue_frames(ax25_cb *); 312extern int ax25_validate_nr(ax25_cb *, unsigned short); 313extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *); 314extern void ax25_send_control(ax25_cb *, int, int, int); 315extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *); 316extern void ax25_calculate_t1(ax25_cb *); 317extern void ax25_calculate_rtt(ax25_cb *); 318extern void ax25_disconnect(ax25_cb *, int); 319 320/* ax25_timer.c */ 321extern void ax25_start_heartbeat(ax25_cb *); 322extern void ax25_start_t1timer(ax25_cb *); 323extern void ax25_start_t2timer(ax25_cb *); 324extern void ax25_start_t3timer(ax25_cb *); 325extern void ax25_start_idletimer(ax25_cb *); 326extern void ax25_stop_heartbeat(ax25_cb *); 327extern void ax25_stop_t1timer(ax25_cb *); 328extern void ax25_stop_t2timer(ax25_cb *); 329extern void ax25_stop_t3timer(ax25_cb *); 330extern void ax25_stop_idletimer(ax25_cb *); 331extern int ax25_t1timer_running(ax25_cb *); 332extern unsigned long ax25_display_timer(struct timer_list *); 333 334/* ax25_uid.c */ 335extern int ax25_uid_policy; 336extern ax25_address *ax25_findbyuid(uid_t); 337extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *); 338extern int ax25_uid_get_info(char *, char **, off_t, int); 339extern void ax25_uid_free(void); 340 341/* sysctl_net_ax25.c */ 342#ifdef CONFIG_SYSCTL 343extern void ax25_register_sysctl(void); 344extern void ax25_unregister_sysctl(void); 345#else 346extern inline void ax25_register_sysctl(void) {}; 347extern inline void ax25_unregister_sysctl(void) {}; 348#endif /* CONFIG_SYSCTL */ 349 350#endif 351