cat.c

dvbsnoop is a DVB/MPEG stream analyzer program. The program can be used to sniff, monitor, debug, d

/*
$Id: cat.c,v 1.10 2004/10/17 22:20:36 rasc Exp $


 DVBSNOOP

 a dvb sniffer  and mpeg2 stream analyzer tool
 http://dvbsnoop.sourceforge.net/

 (c) 2001-2004   [e-mail] (rasc)


 -- CAT Section



$Log: cat.c,v $
Revision 1.10  2004/10/17 22:20:36  rasc
section decoding functions renamed due to preparation of private structures

Revision 1.9  2004/02/12 21:21:21  rasc
MHP AIT descriptors
some smaller changes

Revision 1.8  2004/01/01 20:09:31  rasc
DSM-CC INT/UNT descriptors
PES-sync changed, TS sync changed,
descriptor scope
other changes

Revision 1.7  2003/10/26 22:02:53  rasc
fix

Revision 1.6  2003/10/26 21:36:20  rasc
private DSM-CC descriptor Tags started,
INT-Section completed..

Revision 1.5  2003/10/24 22:45:06  rasc
code reorg...

Revision 1.4  2003/10/24 22:17:20  rasc
code reorg...

Revision 1.3  2002/08/17 20:36:12  obi
no more compiler warnings

Revision 1.2  2001/10/06 18:19:18  Toerli
Steuerzeichen entfernt. rasc wuerdest du mal bitte nen gescheiten unix-konformen Editor verwenden... windows editoren sind ungeeignet

Revision 1.1  2001/09/30 13:05:20  rasc
dvbsnoop v0.7  -- Commit to CVS


*/


#include "dvbsnoop.h"
#include "cat.h"
#include "descriptors/descriptor.h"
#include "strings/dvb_str.h"
#include "misc/output.h"


void section_CAT (u_char *b, int len)
{
 /* IS13818-1  S. 63 */
 /* see also: ETS 468, ETR 289 */

 typedef struct  _CAT {
    u_int      table_id;
    u_int      section_syntax_indicator;		
    u_int      reserved_1;
    u_int      section_length;
    u_int      reserved_2;
    u_int      version_number;
    u_int      current_next_indicator;
    u_int      section_number;
    u_int      last_section_number;

    // private section

    unsigned long CRC;
 } CAT;

 CAT  c;
 int  len1;

 
 c.table_id 			 = b[0];
 c.section_syntax_indicator	 = getBits (b, 0, 8, 1);
 c.reserved_1 			 = getBits (b, 0, 10, 2);
 c.section_length		 = getBits (b, 0, 12, 12);
 c.reserved_2 			 = getBits (b, 0, 24, 18);
 c.version_number 		 = getBits (b, 0, 42, 5);
 c.current_next_indicator	 = getBits (b, 0, 47, 1);
 c.section_number 		 = getBits (b, 0, 48, 8);
 c.last_section_number 		 = getBits (b, 0, 56, 8);



 out_nl (3,"CAT-decoding....");
 out_S2B_NL (3,"Table_ID: ",c.table_id, dvbstrTableID (c.table_id));
 if (c.table_id != 0x01) {
    out_nl (3,"wrong Table ID");
    return;
 }


 out_SB_NL (3,"section_syntax_indicator: ",c.section_syntax_indicator); 
 out_SB_NL (6,"(fixed): ",0);
 out_SB_NL (6,"reserved_1: ",c.reserved_1);
 out_SW_NL (5,"Section_length: ",c.section_length);
 out_SB_NL (6,"reserved_2: ",c.reserved_2);
 out_SB_NL (3,"Version_number: ",c.version_number);
 out_S2B_NL(3,"current_next_indicator: ",c.current_next_indicator, dvbstrCurrentNextIndicator(c.current_next_indicator));
 out_SB_NL (3,"Section_number: ",c.section_number);
 out_SB_NL (3,"Last_Section_number: ",c.last_section_number);

 // buffer + header, len = len - header - CRC
 // Descriptor ISO 13818 - 2.6.1


 // - header - CRC
 len1 = c.section_length - 5;
 b  += 8;


 indent (1);
 while (len1 > 4) {
   int i;

   i     =  descriptor (b, MPEG);
   len1 -= i;
   b    += i;
   
 }
 indent (-1);
 out_NL (3);


 c.CRC 		 = getBits (b, 0, 0, 32);
 out_SL_NL (5,"CRC: ",c.CRC);

}