summaryrefslogtreecommitdiffstats
path: root/Documentation/DocBook/dvb/ca.xml
blob: b1f1d2fad65426eae94dec21d5bba8a91c98bce1 (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
<title>DVB CA Device</title>
<para>The DVB CA device controls the conditional access hardware. It can be accessed through
<emphasis role="tt">/dev/dvb/adapter0/ca0</emphasis>. Data types and and ioctl definitions can be accessed by
including <emphasis role="tt">linux/dvb/ca.h</emphasis> in your application.
</para>

<section id="ca_data_types">
<title>CA Data Types</title>


<section id="ca_slot_info_t">
<title>ca_slot_info_t</title>
 <programlisting>
 /&#x22C6; slot interface types and info &#x22C6;/

 typedef struct ca_slot_info_s {
	 int num;               /&#x22C6; slot number &#x22C6;/

	 int type;           /&#x22C6; CA interface this slot supports &#x22C6;/
 #define CA_CI            1  /&#x22C6; CI high level interface &#x22C6;/
 #define CA_CI_LINK       2  /&#x22C6; CI link layer level interface &#x22C6;/
 #define CA_CI_PHYS       4  /&#x22C6; CI physical layer level interface &#x22C6;/
 #define CA_SC          128  /&#x22C6; simple smart card interface &#x22C6;/

	 unsigned int flags;
 #define CA_CI_MODULE_PRESENT 1 /&#x22C6; module (or card) inserted &#x22C6;/
 #define CA_CI_MODULE_READY   2
 } ca_slot_info_t;
</programlisting>

</section>
<section id="ca_descr_info_t">
<title>ca_descr_info_t</title>
 <programlisting>
 typedef struct ca_descr_info_s {
	 unsigned int num;  /&#x22C6; number of available descramblers (keys) &#x22C6;/
	 unsigned int type; /&#x22C6; type of supported scrambling system &#x22C6;/
 #define CA_ECD           1
 #define CA_NDS           2
 #define CA_DSS           4
 } ca_descr_info_t;
</programlisting>

</section>
<section id="ca_cap_t">
<title>ca_cap_t</title>
 <programlisting>
 typedef struct ca_cap_s {
	 unsigned int slot_num;  /&#x22C6; total number of CA card and module slots &#x22C6;/
	 unsigned int slot_type; /&#x22C6; OR of all supported types &#x22C6;/
	 unsigned int descr_num; /&#x22C6; total number of descrambler slots (keys) &#x22C6;/
	 unsigned int descr_type;/&#x22C6; OR of all supported types &#x22C6;/
 } ca_cap_t;
</programlisting>

</section>
<section id="ca_msg_t">
<title>ca_msg_t</title>
 <programlisting>
 /&#x22C6; a message to/from a CI-CAM &#x22C6;/
 typedef struct ca_msg_s {
	 unsigned int index;
	 unsigned int type;
	 unsigned int length;
	 unsigned char msg[256];
 } ca_msg_t;
</programlisting>

</section>
<section id="ca_descr_t">
<title>ca_descr_t</title>
 <programlisting>
 typedef struct ca_descr_s {
	 unsigned int index;
	 unsigned int parity;
	 unsigned char cw[8];
 } ca_descr_t;
</programlisting>
 </section></section>
<section id="ca_function_calls">
<title>CA Function Calls</title>


<section id="ca_fopen">
<title>open()</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This system call opens a named ca device (e.g. /dev/ost/ca) for subsequent use.</para>
<para>When an open() call has succeeded, the device will be ready for use.
 The significance of blocking or non-blocking mode is described in the
 documentation for functions where there is a difference. It does not affect the
 semantics of the open() call itself. A device opened in blocking mode can later
 be put into non-blocking mode (and vice versa) using the F_SETFL command
 of the fcntl system call. This is a standard system call, documented in the Linux
 manual page for fcntl. Only one user can open the CA Device in O_RDWR
 mode. All other attempts to open the device in this mode will fail, and an error
 code will be returned.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int open(const char &#x22C6;deviceName, int flags);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>const char
 *deviceName</para>
</entry><entry
 align="char">
<para>Name of specific video device.</para>
</entry>
 </row><row><entry
 align="char">
<para>int flags</para>
</entry><entry
 align="char">
<para>A bit-wise OR of the following flags:</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_RDONLY read-only access</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_RDWR read/write access</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>O_NONBLOCK open in non-blocking mode</para>
</entry>
 </row><row><entry
 align="char">
</entry><entry
 align="char">
<para>(blocking mode is the default)</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>ERRORS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>ENODEV</para>
</entry><entry
 align="char">
<para>Device driver not loaded/available.</para>
</entry>
 </row><row><entry
 align="char">
<para>EINTERNAL</para>
</entry><entry
 align="char">
<para>Internal error.</para>
</entry>
 </row><row><entry
 align="char">
<para>EBUSY</para>
</entry><entry
 align="char">
<para>Device or resource busy.</para>
</entry>
 </row><row><entry
 align="char">
<para>EINVAL</para>
</entry><entry
 align="char">
<para>Invalid argument.</para>
</entry>
 </row></tbody></tgroup></informaltable>

</section>
<section id="ca_fclose">
<title>close()</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>This system call closes a previously opened audio device.</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
 align="char">
<para>int close(int fd);</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>int fd</para>
</entry><entry
 align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
 </row></tbody></tgroup></informaltable>
<para>ERRORS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
 align="char">
<para>EBADF</para>
</entry><entry
 align="char">
<para>fd is not a valid open file descriptor.</para>
</entry>
 </row></tbody></tgroup></informaltable>
 </section>
</section>