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1da177e4
LT		 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 ([email protected])
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp ([email protected])
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 */
1da177e4
LT		 13#ifndef __ISDN_H__
14#define __ISDN_H__
15
1da177e4 16
1da177e4
LT		 17#include <linux/errno.h>
18#include <linux/fs.h>
19#include <linux/major.h>
1da177e4
LT		 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>
4e3dfaca 38#include <linux/mutex.h>
607ca46e 39#include <uapi/linux/isdn.h>
1da177e4
LT		 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>
4b32da2b 65#include <linux/ppp-ioctl.h>
1da177e4
LT		 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;
1da177e4
LT		 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
1da177e4
LT		 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 */
d62a38d1 254 struct net_device *dev; /* interface to upper levels */
1da177e4
LT		 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 */
1da177e4
LT		 270#define ISDN_SERIAL_XMIT_SIZE 1024 /* Default bufsize for write */
271#define ISDN_SERIAL_XMIT_MAX 4000 /* Maximum bufsize for write */
1da177e4
LT		 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;
48decc1c 313 struct tty_port port;
1da177e4
LT		 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;
1da177e4
LT		 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 */
1da177e4
LT		 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
1da177e4 355 atemu emu; /* AT-emulator data */
1da177e4
LT		 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 */
606d099c
AC		 366 struct ktermios *modem_termios[ISDN_MAX_CHANNELS];
367 struct ktermios *modem_termios_locked[ISDN_MAX_CHANNELS];
1da177e4
LT		 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 */
4e3dfaca 465 struct mutex mtx; /* serialize list access*/
1da177e4
LT		 466 unsigned long global_features;
467} isdn_dev;
468
469extern isdn_dev *dev;
470
471
1da177e4 472#endif /* __ISDN_H__ */
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