File: dvblastctl.c

package info (click to toggle)
dvblast 2.2-1
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd, wheezy
  • size: 608 kB
  • ctags: 925
  • sloc: ansic: 8,526; sh: 382; makefile: 64
file content (797 lines) | stat: -rw-r--r-- 25,570 bytes parent folder | download
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
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
/*****************************************************************************
 * dvblastctl.c
 *****************************************************************************
 * Copyright (C) 2008 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 <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#include <getopt.h>

#include <bitstream/mpeg/psi.h>
#include <bitstream/dvb/si.h>
#include <bitstream/dvb/si_print.h>
#include <bitstream/mpeg/psi_print.h>

#include "dvblast.h"
#include "en50221.h"
#include "comm.h"

int i_verbose = 3;
int i_syslog = 0;

print_type_t i_print_type = PRINT_TEXT;
mtime_t now;

int i_fd = -1;
char psz_client_socket[PATH_MAX] = {0};

static void clean_client_socket() {
    if ( i_fd > -1 )
    {
        close( i_fd );
        i_fd = -1;
    }
    if ( psz_client_socket[0] )
    {
        unlink( psz_client_socket );
        psz_client_socket[0] = '\0';
    }
}

/*****************************************************************************
 * The following two functions are from biTStream's examples and are under the
 * WTFPL (see LICENSE.WTFPL).
 ****************************************************************************/
__attribute__ ((format(printf, 2, 3)))
static void psi_print(void *_unused, const char *psz_format, ...)
{
    char psz_fmt[strlen(psz_format) + 2];
    va_list args;
    va_start(args, psz_format);
    strcpy(psz_fmt, psz_format);
    strcat(psz_fmt, "\n");
    vprintf(psz_fmt, args);
}

__attribute__ ((format(printf, 1, 2)))
void return_error( const char *psz_format, ... )
{
    va_list args;
    char psz_fmt[1024];

    clean_client_socket();

    va_start( args, psz_format );
    if ( i_print_type == PRINT_XML )
        snprintf( psz_fmt, sizeof(psz_fmt) - 1, "<ERROR msg=\"%s\"/>\n", psz_format );
    else
        snprintf( psz_fmt, sizeof(psz_fmt) - 1, "ERROR: %s\n", psz_format );
    psz_fmt[sizeof(psz_fmt) - 1] = '\0';
    vfprintf( stderr, psz_fmt, args );
    exit(255);
}

static char *iconv_append_null(const char *p_string, size_t i_length)
{
    char *psz_string = malloc(i_length + 1);
    memcpy(psz_string, p_string, i_length);
    psz_string[i_length] = '\0';
    return psz_string;
}

char *psi_iconv(void *_unused, const char *psz_encoding,
                  char *p_string, size_t i_length)
{
    return iconv_append_null(p_string, i_length);
}

void print_pids_header( void )
{
    if ( i_print_type == PRINT_XML )
        printf("<PIDS>\n");
}

void print_pids_footer( void )
{
    if ( i_print_type == PRINT_XML )
        printf("</PIDS>\n");
}

void print_pid(uint16_t i_pid, ts_pid_info_t *p_info)
{
    if ( p_info->i_packets == 0 )
        return;
    if ( i_print_type == PRINT_TEXT )
        printf("pid %d packn %lu ccerr %lu tserr %lu scramble %d Bps %lu seen %"PRId64"\n",
            i_pid,
            p_info->i_packets,
            p_info->i_cc_errors,
            p_info->i_transport_errors,
            p_info->i_scrambling,
            p_info->i_bytes_per_sec,
            now - p_info->i_last_packet_ts
        );
    else
        printf("<PID pid=\"%d\" packn=\"%lu\" ccerr=\"%lu\" tserr=\"%lu\" scramble=\"%d\" Bps=\"%lu\" seen=\"%"PRId64"\" />\n",
            i_pid,
            p_info->i_packets,
            p_info->i_cc_errors,
            p_info->i_transport_errors,
            p_info->i_scrambling,
            p_info->i_bytes_per_sec,
            now - p_info->i_last_packet_ts
        );
}

void print_pids( uint8_t *p_data )
{
    int i_pid;
    print_pids_header();
    for ( i_pid = 0; i_pid < MAX_PIDS; i_pid++ ) {
        ts_pid_info_t *p_info = (ts_pid_info_t *)(p_data + i_pid * sizeof(ts_pid_info_t));
        print_pid( i_pid, p_info );
    }
    print_pids_footer();
}

struct dvblastctl_option {
    char *      opt;
    int         nparams;
    ctl_cmd_t   cmd;
};

static const struct dvblastctl_option options[] =
{
    { "reload",             0, CMD_RELOAD },
    { "shutdown",           0, CMD_SHUTDOWN },

    { "fe_status",          0, CMD_FRONTEND_STATUS },
    { "mmi_status",         0, CMD_MMI_STATUS },

    { "mmi_slot_status",    1, CMD_MMI_SLOT_STATUS }, /* arg: slot */
    { "mmi_open",           1, CMD_MMI_OPEN },        /* arg: slot */
    { "mmi_close",          1, CMD_MMI_CLOSE },       /* arg: slot */
    { "mmi_get",            1, CMD_MMI_RECV },        /* arg: slot */
    { "mmi_send_text",      1, CMD_MMI_SEND_TEXT },   /* arg: slot, en50221_mmi_object_t */
    { "mmi_send_choice",    2, CMD_MMI_SEND_CHOICE }, /* arg: slot, en50221_mmi_object_t */

    { "get_pat",            0, CMD_GET_PAT },
    { "get_cat",            0, CMD_GET_CAT },
    { "get_nit",            0, CMD_GET_NIT },
    { "get_sdt",            0, CMD_GET_SDT },
    { "get_pmt",            1, CMD_GET_PMT }, /* arg: service_id (uint16_t) */
    { "get_pids",           0, CMD_GET_PIDS },
    { "get_pid",            1, CMD_GET_PID },  /* arg: pid (uint16_t) */

    { NULL, 0, 0 }
};

void usage()
{
    printf("DVBlastctl %s (%s)\n", VERSION, VERSION_EXTRA );
    printf("Usage: dvblastctl -r <remote socket> [-x <text|xml>] [cmd]\n");
    printf("Options:\n");
    printf("  -r --remote-socket <name>       Set socket name to <name>.\n" );
    printf("  -x --print <text|xml>           Choose output format for info commands.\n" );
    printf("Control commands:\n");
    printf("  reload                          Reload configuration.\n");
    printf("  shutdown                        Shutdown DVBlast.\n");
    printf("Status commands:\n");
    printf("  fe_status                       Read frontend status information.\n");
    printf("  mmi_status                      Read CAM status.\n");
    printf("MMI commands:\n");
    printf("  mmi_slot_status <slot>          Read MMI slot status.\n");
    printf("  mmi_open <slot>                 Open MMI slot.\n");
    printf("  mmi_close <slot>                Close MMI slot.\n");
    printf("  mmi_get <slot>                  Read MMI slot.\n");
    printf("  mmi_send_text <slot> <text>     Send text to MMI slot.\n");
    printf("  mmi_send_choice <slot> <choice> Send choice to MMI slot.\n");
    printf("Demux info commands:\n");
    printf("  get_pat                         Return last PAT table.\n");
    printf("  get_cat                         Return last CAT table.\n");
    printf("  get_nit                         Return last NIT table.\n");
    printf("  get_sdt                         Return last SDT table.\n");
    printf("  get_pmt <service_id>            Return last PMT table.\n");
    printf("  get_pids                        Return info about all pids.\n");
    printf("  get_pid <pid>                   Return info for chosen pid only.\n");
    printf("\n");
    exit(1);
}

int main( int i_argc, char **ppsz_argv )
{
    char *client_socket_tmpl = "dvblastctl.clientsock.XXXXXX";
    char *psz_srv_socket = NULL;
    int i;
    char *p_cmd, *p_arg1 = NULL, *p_arg2 = NULL;
    ssize_t i_size;
    struct sockaddr_un sun_client, sun_server;
    uint8_t p_buffer[COMM_BUFFER_SIZE];
    uint8_t *p_data = p_buffer + COMM_HEADER_SIZE;
    uint16_t i_pid = 0;
    struct dvblastctl_option opt = { 0, 0, 0 };

    for ( ; ; )
    {
        int c;

        static const struct option long_options[] =
        {
            {"remote-socket", required_argument, NULL, 'r'},
            {"print", required_argument, NULL, 'x'},
            {"help", no_argument, NULL, 'h'},
            {0, 0, 0, 0}
        };

        if ( (c = getopt_long(i_argc, ppsz_argv, "r:x:h", long_options, NULL)) == -1 )
            break;

        switch ( c )
        {
        case 'r':
            psz_srv_socket = optarg;
            break;

        case 'x':
            if ( !strcmp(optarg, "text") )
                i_print_type = PRINT_TEXT;
            else if ( !strcmp(optarg, "xml") )
                i_print_type = PRINT_XML;
            else
                msg_Warn( NULL, "unrecognized print type %s", optarg );
            /* Make stdout line-buffered */
            setvbuf(stdout, NULL, _IOLBF, 0);
            break;

        case 'h':
        default:
            usage();
        }
    }

    /* Validate commands */
#define usage_error(msg, ...) \
        do { \
            msg_Err( NULL, msg, ##__VA_ARGS__ ); \
            usage(); \
        } while(0)
    p_cmd  = ppsz_argv[optind];
    p_arg1 = ppsz_argv[optind + 1];
    p_arg2 = ppsz_argv[optind + 2];

    if ( !psz_srv_socket )
        usage_error( "Remote socket is not set.\n" );

    if ( !p_cmd )
       usage_error( "Command is not set.\n" );

    i = 0;
    do {
        if ( streq(ppsz_argv[optind], options[i].opt) )
        {
            opt = options[i];
            break;
        }
    } while ( options[++i].opt );

    if ( !opt.opt )
        usage_error( "Unknown command: %s\n", p_cmd );

    if ( opt.nparams == 1 && !p_arg1 )
        usage_error( "%s option needs parameter.\n", opt.opt );

    if ( opt.nparams == 2 && (!p_arg1 || !p_arg2) )
        usage_error( "%s option needs two parameters.\n", opt.opt );
#undef usage_error

    /* Create client socket name */
    char *tmpdir = getenv("TMPDIR");
    snprintf( psz_client_socket, PATH_MAX - 1, "%s/%s",
       tmpdir ? tmpdir : "/tmp", client_socket_tmpl );
    psz_client_socket[PATH_MAX - 1] = '\0';

    int tmp_fd = mkstemp(psz_client_socket);
    if ( tmp_fd > -1 ) {
        close(tmp_fd);
        unlink(psz_client_socket);
    } else {
        return_error( "Cannot build UNIX socket %s (%s)", psz_client_socket, strerror(errno) );
    }

    if ( (i_fd = socket( AF_UNIX, SOCK_DGRAM, 0 )) < 0 )
        return_error( "Cannot create UNIX socket (%s)", strerror(errno) );

    i = COMM_MAX_MSG_CHUNK;
    setsockopt( i_fd, SOL_SOCKET, SO_RCVBUF, &i, sizeof(i) );

    memset( &sun_client, 0, sizeof(sun_client) );
    sun_client.sun_family = AF_UNIX;
    strncpy( sun_client.sun_path, psz_client_socket,
             sizeof(sun_client.sun_path) );
    sun_client.sun_path[sizeof(sun_client.sun_path) - 1] = '\0';

    if ( bind( i_fd, (struct sockaddr *)&sun_client,
               SUN_LEN(&sun_client) ) < 0 )
        return_error( "Cannot bind (%s)", strerror(errno) );

    memset( &sun_server, 0, sizeof(sun_server) );
    sun_server.sun_family = AF_UNIX;
    strncpy( sun_server.sun_path, psz_srv_socket, sizeof(sun_server.sun_path) );
    sun_server.sun_path[sizeof(sun_server.sun_path) - 1] = '\0';

    p_buffer[0] = COMM_HEADER_MAGIC;
    p_buffer[1] = opt.cmd;
    memset( p_buffer + 2, 0, COMM_HEADER_SIZE - 2 );
    i_size = COMM_HEADER_SIZE;

    /* Handle commands that send parameters */
    switch ( opt.cmd )
    {
    case CMD_INVALID:
    case CMD_RELOAD:
    case CMD_SHUTDOWN:
    case CMD_FRONTEND_STATUS:
    case CMD_MMI_STATUS:
    case CMD_GET_PAT:
    case CMD_GET_CAT:
    case CMD_GET_NIT:
    case CMD_GET_SDT:
    case CMD_GET_PIDS:
        /* These commands need no special handling because they have no parameters */
        break;
    case CMD_GET_PMT:
    {
        uint16_t i_sid = atoi(p_arg1);
        i_size = COMM_HEADER_SIZE + 2;
        p_data[0] = (uint8_t)((i_sid >> 8) & 0xff);
        p_data[1] = (uint8_t)(i_sid & 0xff);
        break;
    }
    case CMD_GET_PID:
    {
        i_pid = (uint16_t)atoi(p_arg1);
        i_size = COMM_HEADER_SIZE + 2;
        p_data[0] = (uint8_t)((i_pid >> 8) & 0xff);
        p_data[1] = (uint8_t)(i_pid & 0xff);
        break;
    }
    case CMD_MMI_SEND_TEXT:
    {
        struct cmd_mmi_send *p_cmd = (struct cmd_mmi_send *)p_data;
        p_cmd->i_slot = atoi(p_arg1);

        en50221_mmi_object_t object;
        object.i_object_type = EN50221_MMI_ANSW;
        if ( !p_arg2 || p_arg2[0] == '\0' )
        {
             object.u.answ.b_ok = 0;
             object.u.answ.psz_answ = "";
        }
        else
        {
             object.u.answ.b_ok = 1;
             object.u.answ.psz_answ = p_arg2;
        }
        i_size = COMM_BUFFER_SIZE - COMM_HEADER_SIZE
                  - ((void *)&p_cmd->object - (void *)p_cmd);
        if ( en50221_SerializeMMIObject( (uint8_t *)&p_cmd->object,
                                         &i_size, &object ) == -1 )
            return_error( "Comm buffer is too small" );

        i_size += COMM_HEADER_SIZE
                   + ((void *)&p_cmd->object - (void *)p_cmd);
        break;
    }
    case CMD_MMI_SEND_CHOICE:
    {
        struct cmd_mmi_send *p_cmd = (struct cmd_mmi_send *)p_data;
        p_cmd->i_slot = atoi(p_arg1);

        i_size = COMM_HEADER_SIZE + sizeof(struct cmd_mmi_send);
        p_cmd->object.i_object_type = EN50221_MMI_MENU_ANSW;
        p_cmd->object.u.menu_answ.i_choice = atoi(p_arg2);
        break;
    }
    case CMD_MMI_SLOT_STATUS:
    case CMD_MMI_OPEN:
    case CMD_MMI_CLOSE:
    case CMD_MMI_RECV:
    {
        p_data[0] = atoi(p_arg1);
        i_size = COMM_HEADER_SIZE + 1;
        break;
    }
    default:
        /* This should not happen */
        return_error( "Unhandled option (%d)", opt.cmd );
    }

    /* Send command and receive answer */
    if ( sendto( i_fd, p_buffer, i_size, 0, (struct sockaddr *)&sun_server,
                 SUN_LEN(&sun_server) ) < 0 )
        return_error( "Cannot send comm socket (%s)", strerror(errno) );

    uint32_t i_packet_size = 0, i_received = 0;
    do {
        i_size = recv( i_fd, p_buffer + i_received, COMM_MAX_MSG_CHUNK, 0 );
        if ( i_size == -1 )
            break;
        if ( !i_packet_size ) {
            uint32_t *p_packet_size = (uint32_t *)&p_buffer[4];
            i_packet_size = *p_packet_size;
            if ( i_packet_size > COMM_BUFFER_SIZE ) {
                i_size = -1;
                break;
            }
        }
        i_received += i_size;
    } while ( i_received < i_packet_size );

    clean_client_socket();
    if ( i_size < COMM_HEADER_SIZE )
        return_error( "Cannot recv from comm socket, size:%zd (%s)", i_size, strerror(errno) );

    /* Process answer */
    if ( p_buffer[0] != COMM_HEADER_MAGIC )
        return_error( "Wrong protocol version 0x%x", p_buffer[0] );

    now = mdate();

    ctl_cmd_answer_t c_answer = p_buffer[1];
    switch ( c_answer )
    {
    case RET_OK:
        break;

    case RET_MMI_WAIT:
        exit(252);
        break;

    case RET_ERR:
        return_error( "Request failed" );
        break;

    case RET_HUH:
        return_error( "Internal error" );
        break;

    case RET_NODATA:
        return_error( "No data" );
        break;

    case RET_PAT:
    case RET_CAT:
    case RET_NIT:
    case RET_SDT:
    {
        uint8_t *p_flat_data = p_buffer + COMM_HEADER_SIZE;
        unsigned int i_flat_data_size = i_size - COMM_HEADER_SIZE;
        uint8_t **pp_sections = psi_unpack_sections( p_flat_data, i_flat_data_size );

        switch( c_answer )
        {
            case RET_PAT: pat_table_print( pp_sections, psi_print, NULL, i_print_type ); break;
            case RET_CAT: cat_table_print( pp_sections, psi_print, NULL, i_print_type ); break;
            case RET_NIT: nit_table_print( pp_sections, psi_print, NULL, psi_iconv, NULL, i_print_type ); break;
            case RET_SDT: sdt_table_print( pp_sections, psi_print, NULL, psi_iconv, NULL, i_print_type ); break;
            default: break; /* Can't happen */
        }

        psi_table_free( pp_sections );
        free( pp_sections );
        break;
    }

    case RET_PMT:
    {
        pmt_print( p_data, psi_print, NULL, psi_iconv, NULL, i_print_type );
        break;
    }

    case RET_PID:
    {
        print_pids_header();
        print_pid( i_pid, (ts_pid_info_t *)p_data );
        print_pids_footer();
        break;
    }

    case RET_PIDS:
    {
        print_pids( p_data );
        break;
    }

    case RET_FRONTEND_STATUS:
    {
        int ret = 1;
        struct ret_frontend_status *p_ret =
            (struct ret_frontend_status *)&p_buffer[COMM_HEADER_SIZE];
        if ( i_size != COMM_HEADER_SIZE + sizeof(struct ret_frontend_status) )
            return_error( "Bad frontend status" );

        if ( i_print_type == PRINT_XML )
            printf("<FRONTEND>\n");

#define PRINT_TYPE( x ) \
    do { \
        if ( i_print_type == PRINT_XML ) \
            printf( " <TYPE type=\"%s\"/>\n", STRINGIFY(x) ); \
        else \
            printf( "type: %s\n", STRINGIFY(x) ); \
    } while(0)
        switch ( p_ret->info.type )
        {
        case FE_QPSK: PRINT_TYPE(QPSK); break;
        case FE_QAM : PRINT_TYPE(QAM); break;
        case FE_OFDM: PRINT_TYPE(OFDM); break;
        case FE_ATSC: PRINT_TYPE(ATSC); break;
        default     : PRINT_TYPE(UNKNOWN); break;
        }
#undef PRINT_TYPE

#define PRINT_INFO( x ) \
    do { \
        if ( i_print_type == PRINT_XML ) \
            printf( " <SETTING %s=\"%u\"/>\n", STRINGIFY(x), p_ret->info.x ); \
        else \
            printf( "%s: %u\n", STRINGIFY(x), p_ret->info.x ); \
    } while(0)
        PRINT_INFO( frequency_min );
        PRINT_INFO( frequency_max );
        PRINT_INFO( frequency_stepsize );
        PRINT_INFO( frequency_tolerance );
        PRINT_INFO( symbol_rate_min );
        PRINT_INFO( symbol_rate_max );
        PRINT_INFO( symbol_rate_tolerance );
        PRINT_INFO( notifier_delay );
#undef PRINT_INFO

        if ( i_print_type == PRINT_TEXT )
            printf("\ncapability list:\n");

#define PRINT_CAPS( x ) \
    do { \
        if ( p_ret->info.caps & (FE_##x) ) { \
            if ( i_print_type == PRINT_XML ) { \
                printf( " <CAPABILITY %s=\"1\"/>\n", STRINGIFY(x) ); \
            } else { \
                printf( "%s\n", STRINGIFY(x) ); \
            } \
        } \
    } while(0)
        PRINT_CAPS( IS_STUPID );
        PRINT_CAPS( CAN_INVERSION_AUTO );
        PRINT_CAPS( CAN_FEC_1_2 );
        PRINT_CAPS( CAN_FEC_2_3 );
        PRINT_CAPS( CAN_FEC_3_4 );
        PRINT_CAPS( CAN_FEC_4_5 );
        PRINT_CAPS( CAN_FEC_5_6 );
        PRINT_CAPS( CAN_FEC_6_7 );
        PRINT_CAPS( CAN_FEC_7_8 );
        PRINT_CAPS( CAN_FEC_8_9 );
        PRINT_CAPS( CAN_FEC_AUTO );
        PRINT_CAPS( CAN_QPSK );
        PRINT_CAPS( CAN_QAM_16 );
        PRINT_CAPS( CAN_QAM_32 );
        PRINT_CAPS( CAN_QAM_64 );
        PRINT_CAPS( CAN_QAM_128 );
        PRINT_CAPS( CAN_QAM_256 );
        PRINT_CAPS( CAN_QAM_AUTO );
        PRINT_CAPS( CAN_TRANSMISSION_MODE_AUTO );
        PRINT_CAPS( CAN_BANDWIDTH_AUTO );
        PRINT_CAPS( CAN_GUARD_INTERVAL_AUTO );
        PRINT_CAPS( CAN_HIERARCHY_AUTO );
        PRINT_CAPS( CAN_MUTE_TS );

#define DVBAPI_VERSION ((DVB_API_VERSION)*100+(DVB_API_VERSION_MINOR))

#if DVBAPI_VERSION >= 301
        PRINT_CAPS( CAN_8VSB );
        PRINT_CAPS( CAN_16VSB );
        PRINT_CAPS( NEEDS_BENDING );
        PRINT_CAPS( CAN_RECOVER );
#endif
#if DVBAPI_VERSION >= 500
        PRINT_CAPS( HAS_EXTENDED_CAPS );
#endif
#if DVBAPI_VERSION >= 501
        PRINT_CAPS( CAN_2G_MODULATION );
#endif
#undef PRINT_CAPS

        if ( i_print_type == PRINT_TEXT )
            printf("\nstatus:\n");

#define PRINT_STATUS( x ) \
    do { \
        if ( p_ret->i_status & (FE_##x) ) { \
            if ( i_print_type == PRINT_XML ) { \
                printf( " <STATUS status=\"%s\"/>\n", STRINGIFY(x) ); \
            } else { \
                printf( "%s\n", STRINGIFY(x) ); \
            } \
        } \
    } while(0)
        PRINT_STATUS( HAS_SIGNAL );
        PRINT_STATUS( HAS_CARRIER );
        PRINT_STATUS( HAS_VITERBI );
        PRINT_STATUS( HAS_SYNC );
        PRINT_STATUS( HAS_LOCK );
        PRINT_STATUS( REINIT );
#undef PRINT_STATUS

        if ( p_ret->i_status & FE_HAS_LOCK )
        {
            if ( i_print_type == PRINT_XML )
            {
                printf(" <VALUE bit_error_rate=\"%d\"/>\n", p_ret->i_ber);
                printf(" <VALUE signal_strength=\"%d\"/>\n", p_ret->i_strength);
                printf(" <VALUE SNR=\"%d\"/>\n", p_ret->i_snr);
            } else {
                printf("\nBit error rate: %d\n", p_ret->i_ber);
                printf("Signal strength: %d\n", p_ret->i_strength);
                printf("SNR: %d\n", p_ret->i_snr);
            }
            ret = 0;
        }

        if ( i_print_type == PRINT_XML )
            printf("</FRONTEND>\n" );

        exit(ret);
        break;
    }

    case RET_MMI_STATUS:
    {
        struct ret_mmi_status *p_ret =
            (struct ret_mmi_status *)&p_buffer[COMM_HEADER_SIZE];
        if ( i_size != COMM_HEADER_SIZE + sizeof(struct ret_mmi_status) )
            return_error( "Bad MMI status" );

        printf("CA interface with %d %s, type:\n", p_ret->caps.slot_num,
               p_ret->caps.slot_num == 1 ? "slot" : "slots");
#define PRINT_CAPS( x, s )                                              \
        if ( p_ret->caps.slot_type & (CA_##x) )                         \
            printf(s "\n");
        PRINT_CAPS( CI, "CI high level interface" );
        PRINT_CAPS( CI_LINK, "CI link layer level interface" );
        PRINT_CAPS( CI_PHYS, "CI physical layer level interface (not supported)" );
        PRINT_CAPS( DESCR, "built-in descrambler" );
        PRINT_CAPS( SC, "simple smartcard interface" );
#undef PRINT_CAPS

        printf("\n%d available %s\n", p_ret->caps.descr_num,
            p_ret->caps.descr_num == 1 ? "descrambler (key)" :
                                         "descramblers (keys)");
#define PRINT_DESC( x )                                                 \
        if ( p_ret->caps.descr_type & (CA_##x) )                        \
            printf( STRINGIFY(x) "\n" );
        PRINT_DESC( ECD );
        PRINT_DESC( NDS );
        PRINT_DESC( DSS );
#undef PRINT_DESC

        exit( p_ret->caps.slot_num );
        break;
    }

    case RET_MMI_SLOT_STATUS:
    {
        struct ret_mmi_slot_status *p_ret =
            (struct ret_mmi_slot_status *)&p_buffer[COMM_HEADER_SIZE];
        if ( i_size < COMM_HEADER_SIZE + sizeof(struct ret_mmi_slot_status) )
            return_error( "Bad MMI slot status" );

        printf("CA slot #%u: ", p_ret->sinfo.num);

#define PRINT_TYPE( x, s )                                                  \
        if ( p_ret->sinfo.type & (CA_##x) )                                 \
            printf(s);

        PRINT_TYPE( CI, "high level, " );
        PRINT_TYPE( CI_LINK, "link layer level, " );
        PRINT_TYPE( CI_PHYS, "physical layer level, " );
#undef PRINT_TYPE

        if ( p_ret->sinfo.flags & CA_CI_MODULE_READY )
        {
            printf("module present and ready\n");
            exit(0);
        }

        if ( p_ret->sinfo.flags & CA_CI_MODULE_PRESENT )
            printf("module present, not ready\n");
        else
            printf("module not present\n");

        exit(1);
        break;
    }

    case RET_MMI_RECV:
    {
        struct ret_mmi_recv *p_ret =
            (struct ret_mmi_recv *)&p_buffer[COMM_HEADER_SIZE];
        if ( i_size < COMM_HEADER_SIZE + sizeof(struct ret_mmi_recv) )
            return_error( "Bad MMI recv" );

        en50221_UnserializeMMIObject( &p_ret->object, i_size
          - COMM_HEADER_SIZE - ((void *)&p_ret->object - (void *)p_ret) );

        switch ( p_ret->object.i_object_type )
        {
        case EN50221_MMI_ENQ:
            printf("%s\n", p_ret->object.u.enq.psz_text);
            printf("(empty to cancel)\n");
            exit(p_ret->object.u.enq.b_blind ? 253 : 254);
            break;

        case EN50221_MMI_MENU:
            printf("%s\n", p_ret->object.u.menu.psz_title);
            printf("%s\n", p_ret->object.u.menu.psz_subtitle);
            printf("0 - Cancel\n");
            for ( i = 0; i < p_ret->object.u.menu.i_choices; i++ )
                printf("%d - %s\n", i + 1,
                       p_ret->object.u.menu.ppsz_choices[i]);
            printf("%s\n", p_ret->object.u.menu.psz_bottom);
            exit(p_ret->object.u.menu.i_choices);
            break;

        case EN50221_MMI_LIST:
            printf("%s\n", p_ret->object.u.menu.psz_title);
            printf("%s\n", p_ret->object.u.menu.psz_subtitle);
            for ( i = 0; i < p_ret->object.u.menu.i_choices; i++ )
                printf("%s\n", p_ret->object.u.menu.ppsz_choices[i]);
            printf("%s\n", p_ret->object.u.menu.psz_bottom);
            printf("(0 to cancel)\n");
            exit(0);
            break;

        default:
            return_error( "Unknown MMI object" );
            break;
        }

        exit(255);
        break;
    }

    default:
        return_error( "Unknown command answer: %u", c_answer );
    }

    return 0;
}