File: util.c

package info (click to toggle)
dvblast 3.4-1
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid
  • size: 688 kB
  • sloc: ansic: 10,589; sh: 382; makefile: 79
file content (579 lines) | stat: -rw-r--r-- 17,097 bytes parent folder | download | duplicates (2)
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
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
/*****************************************************************************
 * util.c
 *****************************************************************************
 * Copyright (C) 2004, 2015 VideoLAN
 *
 * Authors: Christophe Massiot <massiot@via.ecp.fr>
 *
 * 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 <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <stdarg.h>
#include <sys/time.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <syslog.h>

#include <bitstream/mpeg/psi.h>

#include "dvblast.h"

/*****************************************************************************
 * Local declarations
 *****************************************************************************/
#define MAX_BLOCKS 500
#define MAX_MSG 1024
#define VERB_DBG  4
#define VERB_INFO 3
#define VERB_WARN 2
#define VERB_ERR 1

static block_t *p_block_lifo = NULL;
static unsigned int i_block_count = 0;

/*****************************************************************************
 * block_New
 *****************************************************************************/
block_t *block_New( void )
{
    block_t *p_block;

    if (i_block_count)
    {
        p_block = p_block_lifo;
        p_block_lifo = p_block->p_next;
        i_block_count--;
    }
    else
    {
        p_block = malloc(sizeof(block_t));
    }

    p_block->p_next = NULL;
    p_block->i_refcount = 1;
    return p_block;
}

/*****************************************************************************
 * block_Delete
 *****************************************************************************/
void block_Delete( block_t *p_block )
{
    if (i_block_count >= MAX_BLOCKS )
    {
        free( p_block );
        return;
    }

    p_block->p_next = p_block_lifo;
    p_block_lifo = p_block;
    i_block_count++;
}

/*****************************************************************************
 * block_Vacuum
 *****************************************************************************/
void block_Vacuum( void )
{
    while (i_block_count)
    {
        block_t *p_block = p_block_lifo;
        p_block_lifo = p_block->p_next;
        free(p_block);
        i_block_count--;
    }
}

/*****************************************************************************
 * msg_Connect
 *****************************************************************************/
void msg_Connect( const char *ident )
{
    i_syslog = 1;
    openlog( ident, LOG_NDELAY | LOG_PID, LOG_USER );
}

/*****************************************************************************
 * msg_Disconnect
 *****************************************************************************/
void msg_Disconnect( void )
{
    i_syslog = 0;
    closelog();
}

/*****************************************************************************
 * msg_Info
 *****************************************************************************/
void msg_Info( void *_unused, const char *psz_format, ... )
{
    if ( i_verbose < VERB_INFO )
        return;

    va_list args;
    va_start( args, psz_format );

    if ( !i_syslog )
    {
        char psz_fmt[MAX_MSG];
        snprintf( psz_fmt, MAX_MSG, "info: %s\n", psz_format );
        vfprintf( stderr, psz_fmt, args );
    }
    else
    {
        vsyslog( LOG_INFO, psz_format, args );
    }

    va_end(args);
}

/*****************************************************************************
 * msg_Err
 *****************************************************************************/
void msg_Err( void *_unused, const char *psz_format, ... )
{
    if ( i_verbose < VERB_ERR )
        return;

    va_list args;
    va_start( args, psz_format );

    if ( !i_syslog )
    {
        char psz_fmt[MAX_MSG];
        snprintf( psz_fmt, MAX_MSG, "error: %s\n", psz_format );
        vfprintf( stderr, psz_fmt, args );
    }
    else
    {
        vsyslog( LOG_ERR, psz_format, args );
    }

    va_end(args);
}

/*****************************************************************************
 * msg_Warn
 *****************************************************************************/
void msg_Warn( void *_unused, const char *psz_format, ... )
{
    if ( i_verbose < VERB_WARN )
        return;

    va_list args;
    va_start( args, psz_format );

    if ( !i_syslog )
    {
        char psz_fmt[MAX_MSG];
        snprintf( psz_fmt, MAX_MSG, "warning: %s\n", psz_format );
        vfprintf( stderr, psz_fmt, args );
    }
    else
    {
        vsyslog( LOG_WARNING, psz_format, args );
    }

    va_end(args);
}

/*****************************************************************************
 * msg_Dbg
 *****************************************************************************/
void msg_Dbg( void *_unused, const char *psz_format, ... )
{
    if ( i_verbose < VERB_DBG )
        return;

    va_list args;
    va_start( args, psz_format );

    if ( !i_syslog )
    {
        char psz_fmt[MAX_MSG];
        snprintf( psz_fmt, MAX_MSG, "debug: %s\n", psz_format );
        vfprintf( stderr, psz_fmt, args );
    }
    else
    {
        vsyslog( LOG_DEBUG, psz_format, args );
    }

    va_end(args);
}

/*****************************************************************************
 * msg_Raw
 *****************************************************************************/
void msg_Raw( void *_unused, const char *psz_format, ... )
{
    va_list args;
    char psz_fmt[MAX_MSG];
    va_start( args, psz_format );

    snprintf( psz_fmt, MAX_MSG, "%s\n", psz_format );
    vfprintf( stderr, psz_fmt, args );
    va_end(args);
}

/*****************************************************************************
 * streq
 *****************************************************************************/
inline bool streq(char *a, char *b) {
    if (!a && b) return false;
    if (!b && a) return false;
    if (a == b) return true;
    return strcmp(a, b) == 0 ? true : false;
}

/*****************************************************************************
 * xstrdup
 *****************************************************************************/
inline char * xstrdup(char *str) {
    return str ? strdup(str) : NULL;
}

/*****************************************************************************
 * dvb_string_init
 *****************************************************************************/
void dvb_string_init(dvb_string_t *p_dvb_string)
{
    p_dvb_string->p = NULL;
    p_dvb_string->i = 0;
}

/*****************************************************************************
 * dvb_string_clean
 *****************************************************************************/
void dvb_string_clean(dvb_string_t *p_dvb_string)
{
    free(p_dvb_string->p);
}

/*****************************************************************************
 * dvb_string_copy
 *****************************************************************************/
void dvb_string_copy(dvb_string_t *p_dst, const dvb_string_t *p_src)
{
    p_dst->p = malloc(p_src->i);
    memcpy(p_dst->p, p_src->p, p_src->i);
    p_dst->i = p_src->i;
}

/*****************************************************************************
 * dvb_string_cmp
 *****************************************************************************/
int dvb_string_cmp(const dvb_string_t *p_1, const dvb_string_t *p_2)
{
    if (p_1->i != p_2->i)
        return p_1->i - p_2->i;
    return memcmp(p_1->p, p_2->p, p_1->i);
}

/*****************************************************************************
 * mdate
 *****************************************************************************/
mtime_t mdate( void )
{
#if defined (HAVE_CLOCK_NANOSLEEP)
    struct timespec ts;

    /* Try to use POSIX monotonic clock if available */
    if( clock_gettime( CLOCK_MONOTONIC, &ts ) == EINVAL )
        /* Run-time fallback to real-time clock (always available) */
        (void)clock_gettime( CLOCK_REALTIME, &ts );

    return ((mtime_t)ts.tv_sec * (mtime_t)1000000)
            + (mtime_t)(ts.tv_nsec / 1000);
#else
    struct timeval tv_date;

    /* gettimeofday() could return an error, and should be tested. However, the
     * only possible error, according to 'man', is EFAULT, which can not happen
     * here, since tv is a local variable. */
    gettimeofday( &tv_date, NULL );
    return( (mtime_t) tv_date.tv_sec * 1000000 + (mtime_t) tv_date.tv_usec );
#endif
}

/*****************************************************************************
 * msleep
 *****************************************************************************/
void msleep( mtime_t delay )
{
    struct timespec ts;
    ts.tv_sec = delay / 1000000;
    ts.tv_nsec = (delay % 1000000) * 1000;

#if defined( HAVE_CLOCK_NANOSLEEP )
    int val;
    while ( ( val = clock_nanosleep( CLOCK_MONOTONIC, 0, &ts, &ts ) ) == EINTR );
    if( val == EINVAL )
    {
        ts.tv_sec = delay / 1000000;
        ts.tv_nsec = (delay % 1000000) * 1000;
        while ( clock_nanosleep( CLOCK_REALTIME, 0, &ts, &ts ) == EINTR );
    }
#else
    while ( nanosleep( &ts, &ts ) && errno == EINTR );
#endif
}

/*****************************************************************************
 * hexDump
 *****************************************************************************/
void hexDump( uint8_t *p_data, uint32_t i_len )
{
    uint16_t i, j;

    char *p_outline;
    char *p_hrdata;

    p_outline = malloc(69);
    p_hrdata  = malloc(17);

    for( i = 0; i < i_len; i += 16 )
    {

        sprintf( p_outline, "%03x: ", i );

        for( j = 0; j < 16; j++ )
        {
            if( i + j < i_len )
            {
                sprintf( &p_outline[5 + (3 * j)], "%02x ", p_data[i + j] );

                if( p_data[i + j] >= 32 && p_data[i + j] <= 136 )
                {
                    sprintf( &p_hrdata[j], "%c", p_data[i + j] );
                }

                else {
                    sprintf( &p_hrdata[j], "." );
                }
            }

            else
            {
                sprintf( &p_outline[5 + (3 * j)], "   " );
                sprintf( &p_hrdata[j], " " );
            }
        }

        sprintf( &p_outline[53], "%16s", p_hrdata );
        msg_Dbg( NULL, "%s", p_outline );
    }

    free( p_hrdata );
    free( p_outline );
}

/*****************************************************************************
 * ParseNodeService: parse a host:port string
 *****************************************************************************/
struct addrinfo *ParseNodeService( char *_psz_string, char **ppsz_end,
                                   uint16_t i_default_port )
{
    int i_family = AF_INET;
    char psz_port_buffer[6];
    char *psz_string = strdup( _psz_string );
    char *psz_node, *psz_port = NULL, *psz_end;
    struct addrinfo *p_res;
    struct addrinfo hint;
    int i_ret;

    if ( psz_string[0] == '[' )
    {
        i_family = AF_INET6;
        psz_node = psz_string + 1;
        psz_end = strchr( psz_node, ']' );
        if ( psz_end == NULL )
        {
            msg_Warn( NULL, "invalid IPv6 address %s", _psz_string );
            free( psz_string );
            return NULL;
        }
        *psz_end++ = '\0';
    }
    else
    {
        psz_node = psz_string;
        psz_end = strpbrk( psz_string, "@:,/" );
    }

    if ( psz_end != NULL && psz_end[0] == ':' )
    {
        *psz_end++ = '\0';
        psz_port = psz_end;
        psz_end = strpbrk( psz_port, "@:,/" );
    }

    if ( psz_end != NULL )
    {
        *psz_end = '\0';
        if ( ppsz_end != NULL )
            *ppsz_end = _psz_string + (psz_end - psz_string);
    }
    else if ( ppsz_end != NULL )
        *ppsz_end = _psz_string + strlen(_psz_string);

    if ( i_default_port != 0 && (psz_port == NULL || !*psz_port) )
    {
        sprintf( psz_port_buffer, "%u", i_default_port );
        psz_port = psz_port_buffer;
    }

    if ( psz_node[0] == '\0' )
    {
        free( psz_string );
        return NULL;
    }

    memset( &hint, 0, sizeof(hint) );
    hint.ai_family = i_family;
    hint.ai_socktype = SOCK_DGRAM;
    hint.ai_protocol = 0;
    hint.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV | AI_ADDRCONFIG;
    if ( (i_ret = getaddrinfo( psz_node, psz_port, NULL, &p_res )) != 0 )
    {
        msg_Warn( NULL, "getaddrinfo(host=%s, port=%s) error: %s",
            psz_node, psz_port ? psz_port : "", gai_strerror(i_ret) );
        free( psz_string );
        return NULL;
    }

    free( psz_string );
    return p_res;
}

/*****************************************************************************
 * psi_pack_section: return psi section
 *  Note: Allocates the return value. The caller must free it.
 *****************************************************************************/
uint8_t *psi_pack_section( uint8_t *p_section, unsigned int *pi_size ) {
    uint8_t *p_flat_section;
    uint16_t psi_length = psi_get_length( p_section ) + PSI_HEADER_SIZE;
    *pi_size = 0;

    p_flat_section = malloc( psi_length );
    if ( !p_flat_section )
        return NULL;

    *pi_size = psi_length;
    memcpy( p_flat_section, p_section, psi_length );

    return p_flat_section;
}

/*****************************************************************************
 * psi_pack_sections: return psi sections as array
 *  Note: Allocates the return value. The caller must free it.
 *****************************************************************************/
uint8_t *psi_pack_sections( uint8_t **pp_sections, unsigned int *pi_size ) {
    uint8_t i_last_section;
    uint8_t *p_flat_section;
    unsigned int i, i_pos = 0;

    if ( !psi_table_validate( pp_sections ) )
        return NULL;

    i_last_section = psi_table_get_lastsection( pp_sections );

    /* Calculate total size */
    *pi_size = 0;
    for ( i = 0; i <= i_last_section; i++ )
    {
        uint8_t *p_section = psi_table_get_section( pp_sections, i );
        *pi_size += psi_get_length( p_section ) + PSI_HEADER_SIZE;
    }

    p_flat_section = malloc( *pi_size );
    if ( !p_flat_section )
        return NULL;

    for ( i = 0; i <= i_last_section; i++ )
    {
        uint8_t *p_section = psi_table_get_section( pp_sections, i );
        uint16_t psi_length = psi_get_length( p_section ) + PSI_HEADER_SIZE;

        memcpy( p_flat_section + i_pos, p_section, psi_length );
        i_pos += psi_length;
    }

    return p_flat_section;

}

/*****************************************************************************
 * psi_unpack_sections: return psi sections
 *  Note: Allocates psi_table, the result must be psi_table_free()'ed
 *****************************************************************************/
uint8_t **psi_unpack_sections( uint8_t *p_flat_sections, unsigned int i_size ) {
    uint8_t **pp_sections;
    unsigned int i, i_offset = 0;

    pp_sections = psi_table_allocate();
    if ( !pp_sections )
    {
        msg_Err( NULL, "%s: cannot allocate PSI table\n", __func__ );
        return NULL;
    }

    psi_table_init( pp_sections );

    for ( i = 0; i < PSI_TABLE_MAX_SECTIONS; i++ ) {
        uint8_t *p_section = p_flat_sections + i_offset;
        uint16_t i_section_len = psi_get_length( p_section ) + PSI_HEADER_SIZE;

        if ( !psi_validate( p_section ) )
        {
            msg_Err( NULL, "%s: Invalid section %d\n", __func__, i );
            psi_table_free( pp_sections );
            return NULL;
        }

        /* Must use allocated section not p_flat_section + offset directly! */
        uint8_t *p_section_local = psi_private_allocate();
        if ( !p_section_local )
        {
            msg_Err( NULL, "%s: cannot allocate PSI private\n", __func__ );
            psi_table_free( pp_sections );
            return NULL;
        }
        memcpy( p_section_local, p_section, i_section_len );

        /* We ignore the return value of psi_table_section(), because it is useless
           in this case. We are building the table section by section and when we have
           more than one section in a table, psi_table_section() returns false when section
           0 is added.  */
        psi_table_section( pp_sections, p_section_local );

        i_offset += i_section_len;
        if ( i_offset >= i_size - 1 )
            break;
    }

    return pp_sections;
}