aboutsummaryrefslogtreecommitdiffstats
path: root/wiretap/5views.c
blob: c30571096c0099506871f30836e41f16fc4d6b74 (plain)
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
/* 5views.c
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"
#include <errno.h>
#include <string.h>
#include <time.h>

#include "wtap-int.h"
#include "file_wrappers.h"
#include "buffer.h"
#include "5views.h"


typedef struct
{
	guint32	Signature;
	guint32	Size;		/* Total size of Header in bytes (included Signature) */
	guint32	Version;	/* Identify version and so the format of this record */
	guint32	DataSize;	/* Total size of data included in the Info Record (except the header size) */
	guint32	FileType;	/* Type of the file */
	guint32	Reserved[3];	/* Reserved for future use */
}t_5VW_Info_Header;

typedef struct
{
	guint32	Type;	/* Id of the attribute */
	guint16	Size;	/* Size of the data part of the attribute (not including header size) */
	guint16	Nb;	/* Number of elements */
}t_5VW_Attributes_Header;


#define CST_5VW_INFO_HEADER_KEY		0xAAAAAAAAU		/* signature */

#define	CST_5VW_INFO_RECORD_VERSION	0x00010000U		/* version */

#define CST_5VW_DECALE_FILE_TYPE	24
#define CST_5VW_SECTION_CAPTURES	0x08U
#define CST_5VW_CAPTURES_FILE		(CST_5VW_SECTION_CAPTURES << CST_5VW_DECALE_FILE_TYPE)		/* 0x08000000 */
#define CST_5VW_FLAT_FILE		0x10000000U
#define CST_5VW_CAPTURE_FILEID		(CST_5VW_FLAT_FILE | CST_5VW_CAPTURES_FILE)
#define CST_5VW_FAMILY_CAP_ETH		0x01U
#define CST_5VW_FAMILY_CAP_WAN		0x02U
#define CST_5VW_DECALE_FILE_FAMILY	12
#define CST_5VW_CAP_ETH			(CST_5VW_FAMILY_CAP_ETH << CST_5VW_DECALE_FILE_FAMILY)	/* 0x00001000 */
#define CST_5VW_CAP_WAN			(CST_5VW_FAMILY_CAP_WAN << CST_5VW_DECALE_FILE_FAMILY)	/* 0x00002000 */
#define CST_5VW_CAPTURE_ETH_FILEID	(CST_5VW_CAPTURE_FILEID | CST_5VW_CAP_ETH)
#define CST_5VW_CAPTURE_WAN_FILEID	(CST_5VW_CAPTURE_FILEID | CST_5VW_CAP_WAN)

#define CST_5VW_CAPTURE_FILE_TYPE_MASK	0xFF000000U

#define CST_5VW_FRAME_RECORD		0x00000000U
#define CST_5VW_RECORDS_HEADER_KEY	0x3333EEEEU

typedef struct
{
	t_5VW_Info_Header	Info_Header;
	t_5VW_Attributes_Header	HeaderDateCreation;
	guint32			Time;
	t_5VW_Attributes_Header	HeaderNbFrames;
	guint32			TramesStockeesInFile;
}t_5VW_Capture_Header;

typedef struct
{
	guint32	Key;			/* 0x3333EEEE */
	guint16	HeaderSize;		/* Actual size of this header in bytes (32) */
	guint16	HeaderType;		/* Exact type of this header (0x4000) */
	guint32	RecType;		/* Type of record */
	guint32	RecSubType;		/* Subtype of record */
	guint32	RecSize;		/* Size of one record */
	guint32	RecNb;			/* Number of records */
	guint32	Utc;
	guint32	NanoSecondes;
	guint32	RecInfo;		/* Info about Alarm / Event / Frame captured */
}t_5VW_TimeStamped_Header;


#define CST_5VW_IA_CAP_INF_NB_TRAMES_STOCKEES	0x20000000U
#define CST_5VW_IA_DATE_CREATION		0x80000007U	/* Struct t_Attrib_Date_Create */
#define CST_5VW_TIMESTAMPED_HEADER_TYPE		0x4000U
#define CST_5VW_CAPTURES_RECORD		(CST_5VW_SECTION_CAPTURES << 28)	/* 0x80000000 */
#define CST_5VW_SYSTEM_RECORD		0x00000000U

static gboolean _5views_read(wtap *wth, int *err, gchar **err_info,
    gint64 *data_offset);
static gboolean _5views_seek_read(wtap *wth, gint64 seek_off,
    struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info);
static int _5views_read_header(wtap *wth, FILE_T fh, t_5VW_TimeStamped_Header *hdr,
    struct wtap_pkthdr *phdr, int *err, gchar **err_info);

static gboolean _5views_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr, const guint8 *pd, int *err);
static gboolean _5views_dump_close(wtap_dumper *wdh, int *err);


int _5views_open(wtap *wth, int *err, gchar **err_info)
{
	int bytes_read;
	t_5VW_Capture_Header Capture_Header;
	int encap = WTAP_ENCAP_UNKNOWN;

	errno = WTAP_ERR_CANT_READ;
	bytes_read = file_read(&Capture_Header.Info_Header, sizeof(t_5VW_Info_Header), wth->fh);
	if (bytes_read != sizeof(t_5VW_Info_Header)) {
		*err = file_error(wth->fh, err_info);
		if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
			return -1;
		return 0;
	}

	/*	Check whether that's 5Views format or not */
	if(Capture_Header.Info_Header.Signature != CST_5VW_INFO_HEADER_KEY)
	{
		return 0;
	}

	/* Check Version */
	Capture_Header.Info_Header.Version =
	    pletoh32(&Capture_Header.Info_Header.Version);
	switch (Capture_Header.Info_Header.Version) {

	case CST_5VW_INFO_RECORD_VERSION:
		break;

	default:
		*err = WTAP_ERR_UNSUPPORTED;
		*err_info = g_strdup_printf("5views: header version %u unsupported", Capture_Header.Info_Header.Version);
		return -1;
	}

	/* Check File Type */
	Capture_Header.Info_Header.FileType =
	    pletoh32(&Capture_Header.Info_Header.FileType);
	if((Capture_Header.Info_Header.FileType & CST_5VW_CAPTURE_FILE_TYPE_MASK) != CST_5VW_CAPTURE_FILEID)
	{
		*err = WTAP_ERR_UNSUPPORTED;
		*err_info = g_strdup_printf("5views: file is not a capture file (filetype is %u)", Capture_Header.Info_Header.Version);
		return -1;
	}

	/* Check possible Encap */
	switch (Capture_Header.Info_Header.FileType) {
	case CST_5VW_CAPTURE_ETH_FILEID:
		encap = WTAP_ENCAP_ETHERNET;
		break;
/*	case CST_5VW_CAPTURE_WAN_FILEID:
		break;
*/
	default:
		*err = WTAP_ERR_UNSUPPORTED_ENCAP;
		*err_info = g_strdup_printf("5views: network type %u unknown or unsupported",
		    Capture_Header.Info_Header.FileType);
		return -1;
	}

	/* read the remaining header information */
	bytes_read = file_read(&Capture_Header.HeaderDateCreation, sizeof (t_5VW_Capture_Header) - sizeof(t_5VW_Info_Header), wth->fh);
	if (bytes_read != sizeof (t_5VW_Capture_Header)- sizeof(t_5VW_Info_Header) ) {
		*err = file_error(wth->fh, err_info);
		if (*err == 0)
			*err = WTAP_ERR_SHORT_READ;
		return -1;
	}

	/* This is a 5views capture file */
	wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_5VIEWS;
	wth->subtype_read = _5views_read;
	wth->subtype_seek_read = _5views_seek_read;
	wth->file_encap = encap;
	wth->snapshot_length = 0;	/* not available in header */
	wth->tsprecision = WTAP_FILE_TSPREC_NSEC;

	return 1;
}

/* Read the next packet */
static gboolean
_5views_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
{
	t_5VW_TimeStamped_Header TimeStamped_Header;

	/*
	 * Keep reading until we see a record with a subtype of
	 * CST_5VW_FRAME_RECORD.
	 */
	do
	{
		*data_offset = file_tell(wth->fh);

		/* Read record header. */
		if (!_5views_read_header(wth, wth->fh, &TimeStamped_Header,
		    &wth->phdr, err, err_info))
			return FALSE;

		if (TimeStamped_Header.RecSubType == CST_5VW_FRAME_RECORD) {
			/*
			 * OK, this is a packet.
			 */
			break;
		}

		/*
		 * Not a packet - skip to the next record.
		 */
		if (file_seek(wth->fh, TimeStamped_Header.RecSize, SEEK_CUR, err) == -1)
			return FALSE;
	} while (1);

	if (wth->phdr.caplen > WTAP_MAX_PACKET_SIZE) {
		/*
		 * Probably a corrupt capture file; don't blow up trying
		 * to allocate space for an immensely-large packet.
		 */
		*err = WTAP_ERR_BAD_FILE;
		*err_info = g_strdup_printf("5views: File has %u-byte packet, bigger than maximum of %u",
		    wth->phdr.caplen, WTAP_MAX_PACKET_SIZE);
		return FALSE;
	}

	return wtap_read_packet_bytes(wth->fh, wth->frame_buffer,
	    wth->phdr.caplen, err, err_info);
}

static gboolean
_5views_seek_read(wtap *wth, gint64 seek_off, struct wtap_pkthdr *phdr,
    Buffer *buf, int *err, gchar **err_info)
{
	t_5VW_TimeStamped_Header TimeStamped_Header;

	if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
		return FALSE;

	/*
	 * Read the header.
	 */
	if (!_5views_read_header(wth, wth->random_fh, &TimeStamped_Header,
	    phdr, err, err_info)) {
		if (*err == 0)
			*err = WTAP_ERR_SHORT_READ;
		return FALSE;
	}

	/*
	 * Read the packet data.
	 */
	return wtap_read_packet_bytes(wth->random_fh, buf, phdr->caplen,
	    err, err_info);
}

/* Read the header of the next packet.  Return TRUE on success, FALSE
   on error. */
static gboolean
_5views_read_header(wtap *wth, FILE_T fh, t_5VW_TimeStamped_Header *hdr,
    struct wtap_pkthdr *phdr, int *err, gchar **err_info)
{
	int	bytes_read, bytes_to_read;

	bytes_to_read = sizeof(t_5VW_TimeStamped_Header);

	/* Read record header. */
	bytes_read = file_read(hdr, bytes_to_read, fh);
	if (bytes_read != bytes_to_read) {
		*err = file_error(fh, err_info);
		if (*err == 0 && bytes_read != 0) {
			*err = WTAP_ERR_SHORT_READ;
		}
		return FALSE;
	}

	hdr->Key = pletoh32(&hdr->Key);
	if (hdr->Key != CST_5VW_RECORDS_HEADER_KEY) {
		*err = WTAP_ERR_BAD_FILE;
		*err_info = g_strdup_printf("5views: Time-stamped header has bad key value 0x%08X",
		    hdr->Key);
		return FALSE;
	}

	hdr->RecSubType = pletoh32(&hdr->RecSubType);
	hdr->RecSize = pletoh32(&hdr->RecSize);
	hdr->Utc = pletoh32(&hdr->Utc);
	hdr->NanoSecondes = pletoh32(&hdr->NanoSecondes);

	phdr->rec_type = REC_TYPE_PACKET;
	phdr->presence_flags = WTAP_HAS_TS;
	phdr->ts.secs = hdr->Utc;
	phdr->ts.nsecs = hdr->NanoSecondes;
	phdr->caplen = hdr->RecSize;
	phdr->len = hdr->RecSize;

	switch (wth->file_encap) {

	case WTAP_ENCAP_ETHERNET:
		/* We assume there's no FCS in this frame. */
		phdr->pseudo_header.eth.fcs_len = 0;
		break;
	}

	return TRUE;
}

typedef struct {
	guint32	nframes;
} _5views_dump_t;

static const int wtap_encap[] = {
	-1,		/* WTAP_ENCAP_UNKNOWN -> unsupported */
	CST_5VW_CAPTURE_ETH_FILEID,		/* WTAP_ENCAP_ETHERNET -> Ethernet */
};
#define NUM_WTAP_ENCAPS (sizeof wtap_encap / sizeof wtap_encap[0])

/* Returns 0 if we could write the specified encapsulation type,
   an error indication otherwise. */
int _5views_dump_can_write_encap(int encap)
{
	/* Per-packet encapsulations aren't supported. */
	if (encap == WTAP_ENCAP_PER_PACKET)
		return WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED;

	if (encap < 0 || (unsigned) encap >= NUM_WTAP_ENCAPS || wtap_encap[encap] == -1)
		return WTAP_ERR_UNSUPPORTED_ENCAP;

	return 0;
}

/* Returns TRUE on success, FALSE on failure; sets "*err" to an error code on
   failure */
gboolean _5views_dump_open(wtap_dumper *wdh, int *err)
{
	_5views_dump_t *_5views;

	/* We can't fill in all the fields in the file header, as we
	   haven't yet written any packets.  As we'll have to rewrite
	   the header when we've written out all the packets, we just
	   skip over the header for now. */
	if (wtap_dump_file_seek(wdh, sizeof(t_5VW_Capture_Header), SEEK_SET, err) == -1)
		return FALSE;

	/* This is a 5Views file */
	wdh->subtype_write = _5views_dump;
	wdh->subtype_close = _5views_dump_close;
	_5views = (_5views_dump_t *)g_malloc(sizeof(_5views_dump_t));
	wdh->priv = (void *)_5views;
	_5views->nframes = 0;

	return TRUE;
}

/* Write a record for a packet to a dump file.
   Returns TRUE on success, FALSE on failure. */
static gboolean _5views_dump(wtap_dumper *wdh,
	const struct wtap_pkthdr *phdr,
	const guint8 *pd, int *err)
{
	_5views_dump_t *_5views = (_5views_dump_t *)wdh->priv;
	t_5VW_TimeStamped_Header HeaderFrame;

	/* We can only write packet records. */
	if (phdr->rec_type != REC_TYPE_PACKET) {
		*err = WTAP_ERR_REC_TYPE_UNSUPPORTED;
		return FALSE;
	}

	/* Don't write out something bigger than we can read. */
	if (phdr->caplen > WTAP_MAX_PACKET_SIZE) {
		*err = WTAP_ERR_PACKET_TOO_LARGE;
		return FALSE;
	}

	/* Frame Header */
	/* constant fields */
	HeaderFrame.Key = GUINT32_TO_LE(CST_5VW_RECORDS_HEADER_KEY);
	HeaderFrame.HeaderSize = GUINT16_TO_LE(sizeof(t_5VW_TimeStamped_Header));
	HeaderFrame.HeaderType = GUINT16_TO_LE(CST_5VW_TIMESTAMPED_HEADER_TYPE);
	HeaderFrame.RecType = GUINT32_TO_LE(CST_5VW_CAPTURES_RECORD | CST_5VW_SYSTEM_RECORD);
	HeaderFrame.RecSubType = GUINT32_TO_LE(CST_5VW_FRAME_RECORD);
	HeaderFrame.RecNb = GUINT32_TO_LE(1);

	/* record-dependent fields */
	HeaderFrame.Utc = GUINT32_TO_LE(phdr->ts.secs);
	HeaderFrame.NanoSecondes = GUINT32_TO_LE(phdr->ts.nsecs);
	HeaderFrame.RecSize = GUINT32_TO_LE(phdr->len);
	HeaderFrame.RecInfo = GUINT32_TO_LE(0);

	/* write the record header */
	if (!wtap_dump_file_write(wdh, &HeaderFrame,
	    sizeof(t_5VW_TimeStamped_Header), err))
		return FALSE;

	/* write the data */
	if (!wtap_dump_file_write(wdh, pd, phdr->caplen, err))
		return FALSE;

	_5views->nframes ++;

	return TRUE;
}

static gboolean _5views_dump_close(wtap_dumper *wdh, int *err)
{
	_5views_dump_t *_5views = (_5views_dump_t *)wdh->priv;
	t_5VW_Capture_Header file_hdr;

	if (wtap_dump_file_seek(wdh, 0, SEEK_SET, err) == -1)
		return FALSE;

	/* fill in the Info_Header */
	file_hdr.Info_Header.Signature = GUINT32_TO_LE(CST_5VW_INFO_HEADER_KEY);
	file_hdr.Info_Header.Size = GUINT32_TO_LE(sizeof(t_5VW_Info_Header));	/* Total size of Header in bytes (included Signature) */
	file_hdr.Info_Header.Version = GUINT32_TO_LE(CST_5VW_INFO_RECORD_VERSION); /* Identify version and so the format of this record */
	file_hdr.Info_Header.DataSize = GUINT32_TO_LE(sizeof(t_5VW_Attributes_Header)
					+ sizeof(guint32)
					+ sizeof(t_5VW_Attributes_Header)
					+ sizeof(guint32));
					/* Total size of data included in the Info Record (except the header size) */
	file_hdr.Info_Header.FileType = GUINT32_TO_LE(wtap_encap[wdh->encap]);	/* Type of the file */
	file_hdr.Info_Header.Reserved[0] = 0;	/* Reserved for future use */
	file_hdr.Info_Header.Reserved[1] = 0;	/* Reserved for future use */
	file_hdr.Info_Header.Reserved[2] = 0;	/* Reserved for future use */

	/* fill in the HeaderDateCreation */
	file_hdr.HeaderDateCreation.Type = GUINT32_TO_LE(CST_5VW_IA_DATE_CREATION);	/* Id of the attribute */
	file_hdr.HeaderDateCreation.Size = GUINT16_TO_LE(sizeof(guint32));	/* Size of the data part of the attribute (not including header size) */
	file_hdr.HeaderDateCreation.Nb = GUINT16_TO_LE(1);			/* Number of elements */

	/* fill in the Time field */
#ifdef _WIN32
	_tzset();
#endif
	file_hdr.Time = GUINT32_TO_LE(time(NULL));

	/* fill in the Time field */
	file_hdr.HeaderNbFrames.Type = GUINT32_TO_LE(CST_5VW_IA_CAP_INF_NB_TRAMES_STOCKEES);	/* Id of the attribute */
	file_hdr.HeaderNbFrames.Size = GUINT16_TO_LE(sizeof(guint32));	/* Size of the data part of the attribute (not including header size) */
	file_hdr.HeaderNbFrames.Nb = GUINT16_TO_LE(1);			/* Number of elements */

	/* fill in the number of frames saved */
	file_hdr.TramesStockeesInFile = GUINT32_TO_LE(_5views->nframes);

	/* Write the file header. */
	if (!wtap_dump_file_write(wdh, &file_hdr, sizeof(t_5VW_Capture_Header),
	    err))
		return FALSE;

	return TRUE;
}