1 /* test_sec_ne.c - Test for Not-Equal section filters.
2 * usage: DEMUX=/dev/dvb/adapterX/demuxX test_sec_ne pid [tid [tid_ext]]
3 *
4 * Copyright (C) 2002 convergence GmbH
5 * Johannes Stezenbach <js@convergence.de>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <fcntl.h>
29 #include <sys/ioctl.h>
30 #include <errno.h>
31
32 #include <linux/dvb/dmx.h>
33
34 #include "hex_dump.h"
35
36 #define MAX_SECTION_SIZE 8192
37
38 static unsigned int version_number;
39
usage(void)40 void usage(void)
41 {
42 fprintf(stderr, "usage: test_sec_ne pid [tid [tid_ext]]\n");
43 fprintf(stderr, " Read the version_number from the first section\n");
44 fprintf(stderr, " and sec a filter to wait for it to change.\n");
45 fprintf(stderr, " The default demux device used can be changed\n");
46 fprintf(stderr, " using the DEMUX environment variable;\n");
47 exit(1);
48 }
49
50
process_section(int fd)51 void process_section(int fd)
52 {
53 uint8_t buf[MAX_SECTION_SIZE];
54 int bytes;
55
56 bytes = read(fd, buf, sizeof(buf));
57 if (bytes < 0) {
58 perror("read");
59 if (bytes != ETIMEDOUT)
60 exit(1);
61 }
62 hex_dump(buf, bytes);
63 version_number = ((buf[5] >> 1) & 0x1f);
64 printf("current version_number: %u\n\n", version_number);
65 }
66
set_filter(int fd,unsigned int pid,unsigned int tid,unsigned int tid_ext,unsigned int _version_number)67 int set_filter(int fd, unsigned int pid, unsigned int tid,
68 unsigned int tid_ext, unsigned int _version_number)
69 {
70 struct dmx_sct_filter_params f;
71 unsigned long bufsz;
72
73 if (getenv("BUFFER")) {
74 bufsz=strtoul(getenv("BUFFER"), NULL, 0);
75 if (bufsz > 0 && bufsz <= MAX_SECTION_SIZE) {
76 fprintf(stderr, "DMX_SET_BUFFER_SIZE %lu\n", bufsz);
77 if (ioctl(fd, DMX_SET_BUFFER_SIZE, bufsz) == -1) {
78 perror("DMX_SET_BUFFER_SIZE");
79 return 1;
80 }
81 }
82 }
83 memset(&f.filter, 0, sizeof(struct dmx_filter));
84 f.pid = (uint16_t) pid;
85 if (tid < 0x100) {
86 f.filter.filter[0] = (uint8_t) tid;
87 f.filter.mask[0] = 0xff;
88 }
89 if (tid_ext < 0x10000) {
90 f.filter.filter[1] = (uint8_t) (tid_ext >> 8);
91 f.filter.filter[2] = (uint8_t) (tid_ext & 0xff);
92 f.filter.mask[1] = 0xff;
93 f.filter.mask[2] = 0xff;
94 }
95 if (_version_number < 0x20) {
96 f.filter.filter[3] = (uint8_t) (_version_number << 1);
97 f.filter.mask[3] = 0x3e;
98 f.filter.mode[3] = 0x3e;
99 }
100 f.timeout = 0;
101 f.flags = DMX_IMMEDIATE_START;
102
103 if (ioctl(fd, DMX_SET_FILTER, &f) == -1) {
104 perror("DMX_SET_FILTER");
105 return 1;
106 }
107 return 0;
108 }
109
110
main(int argc,char * argv[])111 int main(int argc, char *argv[])
112 {
113 int dmxfd;
114 unsigned long pid, tid, tid_ext;
115 char * dmxdev = "/dev/dvb/adapter0/demux0";
116
117 if (argc < 2 || argc > 4)
118 usage();
119
120 pid = strtoul(argv[1], NULL, 0);
121 if (pid > 0x1fff)
122 usage();
123 if (argc > 2) {
124 tid = strtoul(argv[2], NULL, 0);
125 if (tid > 0xff)
126 usage();
127 } else
128 tid = 0x100;
129 if (argc > 3) {
130 tid_ext = strtoul(argv[3], NULL, 0);
131 if (tid_ext > 0xffff)
132 usage();
133 } else
134 tid_ext = 0x10000;
135
136 if (getenv("DEMUX"))
137 dmxdev = getenv("DEMUX");
138 fprintf(stderr, "test_sec_ne: using '%s'\n", dmxdev);
139 fprintf(stderr, " PID 0x%04lx\n", pid);
140 if (tid < 0x100)
141 fprintf(stderr, " TID 0x%02lx\n", tid);
142 if (tid_ext < 0x10000)
143 fprintf(stderr, " TID EXT 0x%04lx\n", tid_ext);
144
145 if ((dmxfd = open(dmxdev, O_RDWR)) < 0){
146 perror("open");
147 return 1;
148 }
149
150 if (set_filter(dmxfd, pid, tid, tid_ext, 0xff) != 0)
151 return 1;
152 process_section(dmxfd);
153 while (1) {
154 if (set_filter(dmxfd, pid, tid, tid_ext, version_number) != 0)
155 return 1;
156 process_section(dmxfd);
157 }
158 for (;;) {
159 process_section(dmxfd);
160 }
161
162 close(dmxfd);
163 return 0;
164 }
165