1/* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $ 2 * 3 * Main header for the Linux ISDN subsystem (linklevel). 4 * 5 * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de) 6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg 7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de) 8 * 9 * This software may be used and distributed according to the terms 10 * of the GNU General Public License, incorporated herein by reference. 11 * 12 */ 13#ifndef __ISDN_H__ 14#define __ISDN_H__ 15 16 17#include <linux/errno.h> 18#include <linux/fs.h> 19#include <linux/major.h> 20#include <asm/io.h> 21#include <linux/kernel.h> 22#include <linux/signal.h> 23#include <linux/slab.h> 24#include <linux/timer.h> 25#include <linux/wait.h> 26#include <linux/tty.h> 27#include <linux/tty_flip.h> 28#include <linux/serial_reg.h> 29#include <linux/fcntl.h> 30#include <linux/types.h> 31#include <linux/interrupt.h> 32#include <linux/ip.h> 33#include <linux/in.h> 34#include <linux/netdevice.h> 35#include <linux/etherdevice.h> 36#include <linux/skbuff.h> 37#include <linux/tcp.h> 38#include <linux/mutex.h> 39#include <uapi/linux/isdn.h> 40 41#define ISDN_TTY_MAJOR 43 42#define ISDN_TTYAUX_MAJOR 44 43#define ISDN_MAJOR 45 44 45/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for 46 * physical Channel-Mapping, so they MUST NOT be changed without changing 47 * the correspondent code in isdn.c 48 */ 49 50#define ISDN_MINOR_B 0 51#define ISDN_MINOR_BMAX (ISDN_MAX_CHANNELS-1) 52#define ISDN_MINOR_CTRL 64 53#define ISDN_MINOR_CTRLMAX (64 + (ISDN_MAX_CHANNELS-1)) 54#define ISDN_MINOR_PPP 128 55#define ISDN_MINOR_PPPMAX (128 + (ISDN_MAX_CHANNELS-1)) 56#define ISDN_MINOR_STATUS 255 57 58#ifdef CONFIG_ISDN_PPP 59 60#ifdef CONFIG_ISDN_PPP_VJ 61# include <net/slhc_vj.h> 62#endif 63 64#include <linux/ppp_defs.h> 65#include <linux/ppp-ioctl.h> 66 67#include <linux/isdn_ppp.h> 68#endif 69 70#ifdef CONFIG_ISDN_X25 71# include <linux/concap.h> 72#endif 73 74#include <linux/isdnif.h> 75 76#define ISDN_DRVIOCTL_MASK 0x7f /* Mask for Device-ioctl */ 77 78/* Until now unused */ 79#define ISDN_SERVICE_VOICE 1 80#define ISDN_SERVICE_AB 1<<1 81#define ISDN_SERVICE_X21 1<<2 82#define ISDN_SERVICE_G4 1<<3 83#define ISDN_SERVICE_BTX 1<<4 84#define ISDN_SERVICE_DFUE 1<<5 85#define ISDN_SERVICE_X25 1<<6 86#define ISDN_SERVICE_TTX 1<<7 87#define ISDN_SERVICE_MIXED 1<<8 88#define ISDN_SERVICE_FW 1<<9 89#define ISDN_SERVICE_GTEL 1<<10 90#define ISDN_SERVICE_BTXN 1<<11 91#define ISDN_SERVICE_BTEL 1<<12 92 93/* Macros checking plain usage */ 94#define USG_NONE(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE) 95#define USG_RAW(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW) 96#define USG_MODEM(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) 97#define USG_VOICE(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE) 98#define USG_NET(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET) 99#define USG_FAX(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX) 100#define USG_OUTGOING(x) ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING) 101#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \ 102 ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE) ) 103 104/* Timer-delays and scheduling-flags */ 105#define ISDN_TIMER_RES 4 /* Main Timer-Resolution */ 106#define ISDN_TIMER_02SEC (HZ/ISDN_TIMER_RES/5) /* Slow-Timer1 .2 sec */ 107#define ISDN_TIMER_1SEC (HZ/ISDN_TIMER_RES) /* Slow-Timer2 1 sec */ 108#define ISDN_TIMER_RINGING 5 /* tty RINGs = ISDN_TIMER_1SEC * this factor */ 109#define ISDN_TIMER_KEEPINT 10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */ 110#define ISDN_TIMER_MODEMREAD 1 111#define ISDN_TIMER_MODEMPLUS 2 112#define ISDN_TIMER_MODEMRING 4 113#define ISDN_TIMER_MODEMXMIT 8 114#define ISDN_TIMER_NETDIAL 16 115#define ISDN_TIMER_NETHANGUP 32 116#define ISDN_TIMER_CARRIER 256 /* Wait for Carrier */ 117#define ISDN_TIMER_FAST (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \ 118 ISDN_TIMER_MODEMXMIT) 119#define ISDN_TIMER_SLOW (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \ 120 ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER) 121 122/* Timeout-Values for isdn_net_dial() */ 123#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1))) 124#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1))) 125#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1))) 126 127/* GLOBAL_FLAGS */ 128#define ISDN_GLOBAL_STOPPED 1 129 130/*=================== Start of ip-over-ISDN stuff =========================*/ 131 132/* Feature- and status-flags for a net-interface */ 133#define ISDN_NET_CONNECTED 0x01 /* Bound to ISDN-Channel */ 134#define ISDN_NET_SECURE 0x02 /* Accept calls from phonelist only */ 135#define ISDN_NET_CALLBACK 0x04 /* activate callback */ 136#define ISDN_NET_CBHUP 0x08 /* hangup before callback */ 137#define ISDN_NET_CBOUT 0x10 /* remote machine does callback */ 138 139#define ISDN_NET_MAGIC 0x49344C02 /* for paranoia-checking */ 140 141/* Phone-list-element */ 142typedef struct { 143 void *next; 144 char num[ISDN_MSNLEN]; 145} isdn_net_phone; 146 147/* 148 Principles when extending structures for generic encapsulation protocol 149 ("concap") support: 150 - Stuff which is hardware specific (here i4l-specific) goes in 151 the netdev -> local structure (here: isdn_net_local) 152 - Stuff which is encapsulation protocol specific goes in the structure 153 which holds the linux device structure (here: isdn_net_device) 154*/ 155 156/* Local interface-data */ 157typedef struct isdn_net_local_s { 158 ulong magic; 159 struct net_device_stats stats; /* Ethernet Statistics */ 160 int isdn_device; /* Index to isdn-device */ 161 int isdn_channel; /* Index to isdn-channel */ 162 int ppp_slot; /* PPPD device slot number */ 163 int pre_device; /* Preselected isdn-device */ 164 int pre_channel; /* Preselected isdn-channel */ 165 int exclusive; /* If non-zero idx to reserved chan.*/ 166 int flags; /* Connection-flags */ 167 int dialretry; /* Counter for Dialout-retries */ 168 int dialmax; /* Max. Number of Dial-retries */ 169 int cbdelay; /* Delay before Callback starts */ 170 int dtimer; /* Timeout-counter for dialing */ 171 char msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */ 172 u_char cbhup; /* Flag: Reject Call before Callback*/ 173 u_char dialstate; /* State for dialing */ 174 u_char p_encap; /* Packet encapsulation */ 175 /* 0 = Ethernet over ISDN */ 176 /* 1 = RAW-IP */ 177 /* 2 = IP with type field */ 178 u_char l2_proto; /* Layer-2-protocol */ 179 /* See ISDN_PROTO_L2..-constants in */ 180 /* isdnif.h */ 181 /* 0 = X75/LAPB with I-Frames */ 182 /* 1 = X75/LAPB with UI-Frames */ 183 /* 2 = X75/LAPB with BUI-Frames */ 184 /* 3 = HDLC */ 185 u_char l3_proto; /* Layer-3-protocol */ 186 /* See ISDN_PROTO_L3..-constants in */ 187 /* isdnif.h */ 188 /* 0 = Transparent */ 189 int huptimer; /* Timeout-counter for auto-hangup */ 190 int charge; /* Counter for charging units */ 191 ulong chargetime; /* Timer for Charging info */ 192 int hupflags; /* Flags for charge-unit-hangup: */ 193 /* bit0: chargeint is invalid */ 194 /* bit1: Getting charge-interval */ 195 /* bit2: Do charge-unit-hangup */ 196 /* bit3: Do hangup even on incoming */ 197 int outgoing; /* Flag: outgoing call */ 198 int onhtime; /* Time to keep link up */ 199 int chargeint; /* Interval between charge-infos */ 200 int onum; /* Flag: at least 1 outgoing number */ 201 int cps; /* current speed of this interface */ 202 int transcount; /* byte-counter for cps-calculation */ 203 int sqfull; /* Flag: netdev-queue overloaded */ 204 ulong sqfull_stamp; /* Start-Time of overload */ 205 ulong slavedelay; /* Dynamic bundling delaytime */ 206 int triggercps; /* BogoCPS needed for trigger slave */ 207 isdn_net_phone *phone[2]; /* List of remote-phonenumbers */ 208 /* phone[0] = Incoming Numbers */ 209 /* phone[1] = Outgoing Numbers */ 210 isdn_net_phone *dial; /* Pointer to dialed number */ 211 struct net_device *master; /* Ptr to Master device for slaves */ 212 struct net_device *slave; /* Ptr to Slave device for masters */ 213 struct isdn_net_local_s *next; /* Ptr to next link in bundle */ 214 struct isdn_net_local_s *last; /* Ptr to last link in bundle */ 215 struct isdn_net_dev_s *netdev; /* Ptr to netdev */ 216 struct sk_buff_head super_tx_queue; /* List of supervisory frames to */ 217 /* be transmitted asap */ 218 atomic_t frame_cnt; /* number of frames currently */ 219 /* queued in HL driver */ 220 /* Ptr to orig. hard_header_cache */ 221 spinlock_t xmit_lock; /* used to protect the xmit path of */ 222 /* a particular channel (including */ 223 /* the frame_cnt */ 224 225 int pppbind; /* ippp device for bindings */ 226 int dialtimeout; /* How long shall we try on dialing? (jiffies) */ 227 int dialwait; /* How long shall we wait after failed attempt? (jiffies) */ 228 ulong dialstarted; /* jiffies of first dialing-attempt */ 229 ulong dialwait_timer; /* jiffies of earliest next dialing-attempt */ 230 int huptimeout; /* How long will the connection be up? (seconds) */ 231#ifdef CONFIG_ISDN_X25 232 struct concap_device_ops *dops; /* callbacks used by encapsulator */ 233#endif 234 /* use an own struct for that in later versions */ 235 ulong cisco_myseq; /* Local keepalive seq. for Cisco */ 236 ulong cisco_mineseen; /* returned keepalive seq. from remote */ 237 ulong cisco_yourseq; /* Remote keepalive seq. for Cisco */ 238 int cisco_keepalive_period; /* keepalive period */ 239 ulong cisco_last_slarp_in; /* jiffie of last keepalive packet we received */ 240 char cisco_line_state; /* state of line according to keepalive packets */ 241 char cisco_debserint; /* debugging flag of cisco hdlc with slarp */ 242 struct timer_list cisco_timer; 243 struct work_struct tqueue; 244} isdn_net_local; 245 246/* the interface itself */ 247typedef struct isdn_net_dev_s { 248 isdn_net_local *local; 249 isdn_net_local *queue; /* circular list of all bundled 250 channels, which are currently 251 online */ 252 spinlock_t queue_lock; /* lock to protect queue */ 253 void *next; /* Pointer to next isdn-interface */ 254 struct net_device *dev; /* interface to upper levels */ 255#ifdef CONFIG_ISDN_PPP 256 ippp_bundle * pb; /* pointer to the common bundle structure 257 * with the per-bundle data */ 258#endif 259#ifdef CONFIG_ISDN_X25 260 struct concap_proto *cprot; /* connection oriented encapsulation protocol */ 261#endif 262 263} isdn_net_dev; 264 265/*===================== End of ip-over-ISDN stuff ===========================*/ 266 267/*======================= Start of ISDN-tty stuff ===========================*/ 268 269#define ISDN_ASYNC_MAGIC 0x49344C01 /* for paranoia-checking */ 270#define ISDN_SERIAL_XMIT_SIZE 1024 /* Default bufsize for write */ 271#define ISDN_SERIAL_XMIT_MAX 4000 /* Maximum bufsize for write */ 272 273#ifdef CONFIG_ISDN_AUDIO 274/* For using sk_buffs with audio we need some private variables 275 * within each sk_buff. For this purpose, we declare a struct here, 276 * and put it always at the private skb->cb data array. A few macros help 277 * accessing the variables. 278 */ 279typedef struct _isdn_audio_data { 280 unsigned short dle_count; 281 unsigned char lock; 282} isdn_audio_data_t; 283 284#define ISDN_AUDIO_SKB_DLECOUNT(skb) (((isdn_audio_data_t *)&skb->cb[0])->dle_count) 285#define ISDN_AUDIO_SKB_LOCK(skb) (((isdn_audio_data_t *)&skb->cb[0])->lock) 286#endif 287 288/* Private data of AT-command-interpreter */ 289typedef struct atemu { 290 u_char profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0 */ 291 u_char mdmreg[ISDN_MODEM_NUMREG]; /* Modem-Registers */ 292 char pmsn[ISDN_MSNLEN]; /* EAZ/MSNs Profile 0 */ 293 char msn[ISDN_MSNLEN]; /* EAZ/MSN */ 294 char plmsn[ISDN_LMSNLEN]; /* Listening MSNs Profile 0 */ 295 char lmsn[ISDN_LMSNLEN]; /* Listening MSNs */ 296 char cpn[ISDN_MSNLEN]; /* CalledPartyNumber on incoming call */ 297 char connmsg[ISDN_CMSGLEN]; /* CONNECT-Msg from HL-Driver */ 298#ifdef CONFIG_ISDN_AUDIO 299 u_char vpar[10]; /* Voice-parameters */ 300 int lastDLE; /* Flag for voice-coding: DLE seen */ 301#endif 302 int mdmcmdl; /* Length of Modem-Commandbuffer */ 303 int pluscount; /* Counter for +++ sequence */ 304 u_long lastplus; /* Timestamp of last + */ 305 int carrierwait; /* Seconds of carrier waiting */ 306 char mdmcmd[255]; /* Modem-Commandbuffer */ 307 unsigned int charge; /* Charge units of current connection */ 308} atemu; 309 310/* Private data (similar to async_struct in <linux/serial.h>) */ 311typedef struct modem_info { 312 int magic; 313 struct tty_port port; 314 int x_char; /* xon/xoff character */ 315 int mcr; /* Modem control register */ 316 int msr; /* Modem status register */ 317 int lsr; /* Line status register */ 318 int line; 319 int online; /* 1 = B-Channel is up, drop data */ 320 /* 2 = B-Channel is up, deliver d.*/ 321 int dialing; /* Dial in progress or ATA */ 322 int rcvsched; /* Receive needs schedule */ 323 int isdn_driver; /* Index to isdn-driver */ 324 int isdn_channel; /* Index to isdn-channel */ 325 int drv_index; /* Index to dev->usage */ 326 int ncarrier; /* Flag: schedule NO CARRIER */ 327 unsigned char last_cause[8]; /* Last cause message */ 328 unsigned char last_num[ISDN_MSNLEN]; 329 /* Last phone-number */ 330 unsigned char last_l2; /* Last layer-2 protocol */ 331 unsigned char last_si; /* Last service */ 332 unsigned char last_lhup; /* Last hangup local? */ 333 unsigned char last_dir; /* Last direction (in or out) */ 334 struct timer_list nc_timer; /* Timer for delayed NO CARRIER */ 335 int send_outstanding;/* # of outstanding send-requests */ 336 int xmit_size; /* max. # of chars in xmit_buf */ 337 int xmit_count; /* # of chars in xmit_buf */ 338 struct sk_buff_head xmit_queue; /* transmit queue */ 339 atomic_t xmit_lock; /* Semaphore for isdn_tty_write */ 340#ifdef CONFIG_ISDN_AUDIO 341 int vonline; /* Voice-channel status */ 342 /* Bit 0 = recording */ 343 /* Bit 1 = playback */ 344 /* Bit 2 = playback, DLE-ETX seen */ 345 struct sk_buff_head dtmf_queue; /* queue for dtmf results */ 346 void *adpcms; /* state for adpcm decompression */ 347 void *adpcmr; /* state for adpcm compression */ 348 void *dtmf_state; /* state for dtmf decoder */ 349 void *silence_state; /* state for silence detection */ 350#endif 351#ifdef CONFIG_ISDN_TTY_FAX 352 struct T30_s *fax; /* T30 Fax Group 3 data/interface */ 353 int faxonline; /* Fax-channel status */ 354#endif 355 atemu emu; /* AT-emulator data */ 356 spinlock_t readlock; 357} modem_info; 358 359#define ISDN_MODEM_WINSIZE 8 360 361/* Description of one ISDN-tty */ 362typedef struct _isdn_modem { 363 int refcount; /* Number of opens */ 364 struct tty_driver *tty_modem; /* tty-device */ 365 struct tty_struct *modem_table[ISDN_MAX_CHANNELS]; /* ?? copied from Orig */ 366 struct ktermios *modem_termios[ISDN_MAX_CHANNELS]; 367 struct ktermios *modem_termios_locked[ISDN_MAX_CHANNELS]; 368 modem_info info[ISDN_MAX_CHANNELS]; /* Private data */ 369} isdn_modem_t; 370 371/*======================= End of ISDN-tty stuff ============================*/ 372 373/*======================== Start of V.110 stuff ============================*/ 374#define V110_BUFSIZE 1024 375 376typedef struct { 377 int nbytes; /* 1 Matrixbyte -> nbytes in stream */ 378 int nbits; /* Number of used bits in streambyte */ 379 unsigned char key; /* Bitmask in stream eg. 11 (nbits=2) */ 380 int decodelen; /* Amount of data in decodebuf */ 381 int SyncInit; /* Number of sync frames to send */ 382 unsigned char *OnlineFrame; /* Precalculated V110 idle frame */ 383 unsigned char *OfflineFrame; /* Precalculated V110 sync Frame */ 384 int framelen; /* Length of frames */ 385 int skbuser; /* Number of unacked userdata skbs */ 386 int skbidle; /* Number of unacked idle/sync skbs */ 387 int introducer; /* Local vars for decoder */ 388 int dbit; 389 unsigned char b; 390 int skbres; /* space to reserve in outgoing skb */ 391 int maxsize; /* maxbufsize of lowlevel driver */ 392 unsigned char *encodebuf; /* temporary buffer for encoding */ 393 unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices */ 394} isdn_v110_stream; 395 396/*========================= End of V.110 stuff =============================*/ 397 398/*======================= Start of general stuff ===========================*/ 399 400typedef struct { 401 char *next; 402 char *private; 403} infostruct; 404 405#define DRV_FLAG_RUNNING 1 406#define DRV_FLAG_REJBUS 2 407#define DRV_FLAG_LOADED 4 408 409/* Description of hardware-level-driver */ 410typedef struct _isdn_driver { 411 ulong online; /* Channel-Online flags */ 412 ulong flags; /* Misc driver Flags */ 413 int locks; /* Number of locks for this driver */ 414 int channels; /* Number of channels */ 415 wait_queue_head_t st_waitq; /* Wait-Queue for status-read's */ 416 int maxbufsize; /* Maximum Buffersize supported */ 417 unsigned long pktcount; /* Until now: unused */ 418 int stavail; /* Chars avail on Status-device */ 419 isdn_if *interface; /* Interface to driver */ 420 int *rcverr; /* Error-counters for B-Ch.-receive */ 421 int *rcvcount; /* Byte-counters for B-Ch.-receive */ 422#ifdef CONFIG_ISDN_AUDIO 423 unsigned long DLEflag; /* Flags: Insert DLE at next read */ 424#endif 425 struct sk_buff_head *rpqueue; /* Pointers to start of Rcv-Queue */ 426 wait_queue_head_t *rcv_waitq; /* Wait-Queues for B-Channel-Reads */ 427 wait_queue_head_t *snd_waitq; /* Wait-Queue for B-Channel-Send's */ 428 char msn2eaz[10][ISDN_MSNLEN]; /* Mapping-Table MSN->EAZ */ 429} isdn_driver_t; 430 431/* Main driver-data */ 432typedef struct isdn_devt { 433 struct module *owner; 434 spinlock_t lock; 435 unsigned short flags; /* Bitmapped Flags: */ 436 int drivers; /* Current number of drivers */ 437 int channels; /* Current number of channels */ 438 int net_verbose; /* Verbose-Flag */ 439 int modempoll; /* Flag: tty-read active */ 440 spinlock_t timerlock; 441 int tflags; /* Timer-Flags: */ 442 /* see ISDN_TIMER_..defines */ 443 int global_flags; 444 infostruct *infochain; /* List of open info-devs. */ 445 wait_queue_head_t info_waitq; /* Wait-Queue for isdninfo */ 446 struct timer_list timer; /* Misc.-function Timer */ 447 int chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel */ 448 int drvmap[ISDN_MAX_CHANNELS]; /* Map minor->driver-index */ 449 int usage[ISDN_MAX_CHANNELS]; /* Used by tty/ip/voice */ 450 char num[ISDN_MAX_CHANNELS][ISDN_MSNLEN]; 451 /* Remote number of active ch.*/ 452 int m_idx[ISDN_MAX_CHANNELS]; /* Index for mdm.... */ 453 isdn_driver_t *drv[ISDN_MAX_DRIVERS]; /* Array of drivers */ 454 isdn_net_dev *netdev; /* Linked list of net-if's */ 455 char drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID */ 456 struct task_struct *profd; /* For iprofd */ 457 isdn_modem_t mdm; /* tty-driver-data */ 458 isdn_net_dev *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers */ 459 isdn_net_dev *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers */ 460 ulong ibytes[ISDN_MAX_CHANNELS]; /* Statistics incoming bytes */ 461 ulong obytes[ISDN_MAX_CHANNELS]; /* Statistics outgoing bytes */ 462 int v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */ 463 atomic_t v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */ 464 isdn_v110_stream *v110[ISDN_MAX_CHANNELS]; /* V.110 private data */ 465 struct mutex mtx; /* serialize list access*/ 466 unsigned long global_features; 467} isdn_dev; 468 469extern isdn_dev *dev; 470 471 472#endif /* __ISDN_H__ */ 473