1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
|
/*
* Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------
*
* i4btrc - device driver for trace data read device
* ---------------------------------------------------
*
* $Id: i4b_trace.c,v 1.14 1998/12/05 18:02:51 hm Exp $
*
* last edit-date: [Sat Dec 5 18:01:53 1998]
*
* NOTE: the code assumes that SPLI4B >= splimp !
*
*---------------------------------------------------------------------------*/
#include "i4btrc.h"
#if NI4BTRC > 0
#ifdef __FreeBSD__
#include "isic.h" /* 'isic' is no pseudo-device on non FreeBSD -
* so we just can't count it at compile time,
* we're doing an attach-time check instead. */
#if NI4BTRC < NISIC
#error "number of trace devices != number of passive ISDN controllers !"
#error "change number of i4btrc to be equal to number of isic devices !"
#endif
#endif /* __FreeBSD__ */
#include <sys/param.h>
#include <sys/systm.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/proc.h>
#include <sys/tty.h>
#ifdef __FreeBSD__
#include "opt_devfs.h"
#endif
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
#ifdef __FreeBSD__
#include <machine/i4b_trace.h>
#include <machine/i4b_ioctl.h>
#else
#include <i4b/i4b_trace.h>
#include <i4b/i4b_ioctl.h>
#endif
#ifndef __FreeBSD__
#define memcpy(d,s,l) bcopy(s,d,l)
#endif
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_l3l4.h>
static struct ifqueue trace_queue[NI4BTRC];
static int device_state[NI4BTRC];
#define ST_IDLE 0x00
#define ST_ISOPEN 0x01
#define ST_WAITDATA 0x02
#ifdef DEVFS
static void *devfs_token[NI4BTRC];
#endif
static int analyzemode = 0;
static int rxunit = -1;
static int txunit = -1;
static int outunit = -1;
#ifndef __FreeBSD__
#define PDEVSTATIC /* - not static - */
void i4btrcattach __P((void));
int i4btrcopen __P((dev_t dev, int flag, int fmt, struct proc *p));
int i4btrcclose __P((dev_t dev, int flag, int fmt, struct proc *p));
int i4btrcread __P((dev_t dev, struct uio * uio, int ioflag));
int i4btrcioctl __P((dev_t dev, int cmd, caddr_t data, int flag, struct proc *p));
#endif
#if BSD > 199306 && defined(__FreeBSD__)
#define PDEVSTATIC static
static d_open_t i4btrcopen;
static d_close_t i4btrcclose;
static d_read_t i4btrcread;
static d_ioctl_t i4btrcioctl;
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
static d_poll_t i4btrcpoll;
#endif
#define CDEV_MAJOR 59
static struct cdevsw i4btrc_cdevsw = {
i4btrcopen, i4btrcclose, i4btrcread, nowrite,
i4btrcioctl, nostop, noreset, nodevtotty,
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
i4btrcpoll, nommap, NULL, "i4btrc", NULL, -1
#else
noselect, nommap, NULL, "i4btrc", NULL, -1
#endif
};
/*---------------------------------------------------------------------------*
* interface init routine
*---------------------------------------------------------------------------*/
static
void i4btrcinit(void *unused)
{
dev_t dev;
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev, &i4btrc_cdevsw, NULL);
}
SYSINIT(i4btrcdev, SI_SUB_DRIVERS,
SI_ORDER_MIDDLE+CDEV_MAJOR, &i4btrcinit, NULL);
static void i4btrcattach(void *);
PSEUDO_SET(i4btrcattach, i4b_trace);
#endif /* BSD > 199306 && defined(__FreeBSD__) */
int get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf);
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
i4btrcattach(void *dummy)
#else
i4btrcattach()
#endif
{
int i;
#ifndef HACK_NO_PSEUDO_ATTACH_MSG
printf("i4btrc: %d ISDN trace device(s) attached\n", NI4BTRC);
#endif
for(i=0; i < NI4BTRC; i++)
{
#ifdef DEVFS
devfs_token[i]
= devfs_add_devswf(&i4btrc_cdevsw, i, DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"i4btrc%d", i);
#endif
trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
device_state[i] = ST_IDLE;
}
}
/*---------------------------------------------------------------------------*
* get_trace_data_from_l1()
* ------------------------
* is called from layer 1, adds timestamp to trace data and puts
* it into a queue, from which it can be read from the i4btrc
* device. The unit number in the trace header selects the minor
* device's queue the data is put into.
*---------------------------------------------------------------------------*/
int
get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf)
{
struct mbuf *m;
int x;
int unit;
int trunc = 0;
int totlen = len + sizeof(i4b_trace_hdr_t);
/*
* for telephony (or better non-HDLC HSCX mode) we get
* (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
* to put into the queue to userland. because of this
* we detect this situation, strip the length to MCLBYTES
* max size, and infor the userland program of this fact
* by putting the no of truncated bytes into hdr->trunc.
*/
if(totlen > MCLBYTES)
{
trunc = 1;
hdr->trunc = totlen - MCLBYTES;
totlen = MCLBYTES;
}
else
{
hdr->trunc = 0;
}
/* set length of trace record */
hdr->length = totlen;
/* check valid unit no */
if((unit = hdr->unit) > NI4BTRC)
{
printf("i4b_trace: get_trace_data_from_l1 - unit > NI4BTRC!\n");
return(0);
}
/* get mbuf */
if(!(m = i4b_Bgetmbuf(totlen)))
{
printf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
return(0);
}
/* check if we are in analyzemode */
if(analyzemode && (unit == rxunit || unit == txunit))
{
if(unit == rxunit)
hdr->dir = FROM_NT;
else
hdr->dir = FROM_TE;
unit = outunit;
}
if(IF_QFULL(&trace_queue[unit]))
{
struct mbuf *m1;
x = SPLI4B();
IF_DEQUEUE(&trace_queue[unit], m1);
splx(x);
i4b_Bfreembuf(m1);
}
/* copy trace header */
memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr_t));
/* copy trace data */
if(trunc)
memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, totlen-sizeof(i4b_trace_hdr_t));
else
memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, len);
x = SPLI4B();
IF_ENQUEUE(&trace_queue[unit], m);
if(device_state[unit] & ST_WAITDATA)
{
device_state[unit] &= ~ST_WAITDATA;
wakeup((caddr_t) &trace_queue[unit]);
}
splx(x);
return(1);
}
/*---------------------------------------------------------------------------*
* open trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcopen(dev_t dev, int flag, int fmt, struct proc *p)
{
int x;
int unit = minor(dev);
if(unit > NI4BTRC)
return(ENXIO);
if(device_state[unit] & ST_ISOPEN)
return(EBUSY);
if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
return(EBUSY);
x = SPLI4B();
device_state[unit] = ST_ISOPEN;
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* close trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcclose(dev_t dev, int flag, int fmt, struct proc *p)
{
int unit = minor(dev);
int i, x, cno = -1;
for(i = 0; i < nctrl; i++)
{
if(ctrl_desc[i].N_SET_TRACE)
{
cno = i;
break;
}
}
if(analyzemode && (unit == outunit))
{
analyzemode = 0;
outunit = -1;
if(cno >= 0)
{
ctrl_desc[cno].N_SET_TRACE(rxunit, TRACE_OFF);
ctrl_desc[cno].N_SET_TRACE(txunit, TRACE_OFF);
}
rxunit = -1;
txunit = -1;
}
if(cno >= 0)
{
ctrl_desc[cno].N_SET_TRACE(unit, TRACE_OFF);
}
x = SPLI4B();
device_state[unit] = ST_IDLE;
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* read from trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcread(dev_t dev, struct uio * uio, int ioflag)
{
struct mbuf *m;
int x;
int error = 0;
int unit = minor(dev);
if(!(device_state[unit] & ST_ISOPEN))
return(EIO);
x = SPLI4B();
while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
{
device_state[unit] |= ST_WAITDATA;
if((error = tsleep((caddr_t) &trace_queue[unit],
TTIPRI | PCATCH,
"bitrc", 0 )) != 0)
{
device_state[unit] &= ~ST_WAITDATA;
splx(x);
return(error);
}
}
IF_DEQUEUE(&trace_queue[unit], m);
if(m && m->m_len)
error = uiomove(m->m_data, m->m_len, uio);
else
error = EIO;
if(m)
i4b_Bfreembuf(m);
splx(x);
return(error);
}
/*---------------------------------------------------------------------------*
* poll device
*---------------------------------------------------------------------------*/
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
PDEVSTATIC int
i4btrcpoll(dev_t dev, int events, struct proc *p)
{
return(ENODEV);
}
#endif
/*---------------------------------------------------------------------------*
* device driver ioctl routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
#if defined (__FreeBSD_version) && __FreeBSD_version >= 300003
i4btrcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#else
i4btrcioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
#endif
{
int error = 0;
int unit = minor(dev);
i4b_trace_setupa_t *tsa;
int i, cno = -1;
/* find the first passive controller to get at the set/get function
pointers. Would be better if we had the controller class virtual
function table separate from the port registry... */
for(i=0; i < nctrl; i++)
{
if(ctrl_desc[i].N_SET_TRACE)
{
cno = i; /* one suitable controller, might not */
break; /* be related to the trace unit at all, but */
} /* has the right function pointers */
}
switch(cmd)
{
case I4B_TRC_GET:
if(cno < 0)
return ENOTTY;
*(int *)data = ctrl_desc[cno].N_GET_TRACE(unit);
break;
case I4B_TRC_SET:
if(cno < 0)
return ENOTTY;
ctrl_desc[cno].N_SET_TRACE(unit, *(int *)data);
break;
case I4B_TRC_SETA:
tsa = (i4b_trace_setupa_t *)data;
if(tsa->rxunit >= 0 && tsa->rxunit < NI4BTRC)
rxunit = tsa->rxunit;
else
error = EINVAL;
if(tsa->txunit >= 0 && tsa->txunit < NI4BTRC)
txunit = tsa->txunit;
else
error = EINVAL;
if(error)
{
outunit = -1;
rxunit = -1;
txunit = -1;
}
else
{
if(cno < 0)
return ENOTTY;
outunit = unit;
analyzemode = 1;
ctrl_desc[cno].N_SET_TRACE(rxunit, tsa->rxflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX));
ctrl_desc[cno].N_SET_TRACE(txunit, tsa->txflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX));
}
break;
case I4B_TRC_RESETA:
analyzemode = 0;
outunit = -1;
rxunit = -1;
txunit = -1;
break;
default:
error = ENOTTY;
break;
}
return(error);
}
#endif /* NI4BTRC > 0 */
|