dsmcc.c

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

/*
$Id: dsmcc.c,v 1.10 2004/10/17 22:20:35 rasc Exp $


 DVBSNOOP

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

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


 --  DSM-CC Section
 --  DSM-CC Data Carousel
 --   ETSI TR 101 202
 --   ISO/IEC 13818-6



$Log: dsmcc.c,v $
Revision 1.10  2004/10/17 22:20:35  rasc
section decoding functions renamed due to preparation of private structures

Revision 1.9  2004/02/15 18:58:27  rasc
DSM-CC  data/object carousell continued   (DSI, DII, DDB, DCancel)

Revision 1.8  2004/02/15 01:01:00  rasc
DSM-CC  DDB (DownloadDataBlock Message)
DSM-CC  U-N-Message  started
Carousel Descriptors completed

Revision 1.7  2004/02/14 01:24:44  rasc
DSM-CC started  (DSI/DII, DDB)

Revision 1.6  2004/01/22 22:26:34  rasc
pes_pack_header
section read timeout

Revision 1.5  2004/01/02 22:25:34  rasc
DSM-CC  MODULEs descriptors complete

Revision 1.4  2004/01/02 16:40:33  rasc
DSM-CC  INT/UNT descriptors complete
minor changes and fixes

Revision 1.3  2004/01/01 20:09:16  rasc
DSM-CC INT/UNT descriptors
PES-sync changed, TS sync changed,
descriptor scope
other changes

Revision 1.2  2003/12/27 14:35:00  rasc
dvb-t descriptors
DSM-CC: SSU Linkage/DataBroadcast descriptors

Revision 1.1  2003/12/27 00:21:16  rasc
dsmcc section tables




*/



#include "dvbsnoop.h"
#include "dsmcc.h"
#include "dsmcc_ddb.h"
#include "dsmcc_unm.h"
#include "dsmcc_misc.h"
#include "llc_snap.h"

#include "descriptors/descriptor.h"
#include "strings/dsmcc_str.h"
#include "strings/dvb_str.h"

#include "misc/output.h"
#include "misc/hexprint.h"




static void DSMCC_descriptor_list (u_char *b, int len);



void section_DSMCC (u_char *b, int len)
{
 /* TR 101 202 */

 int        len1;
 u_int      table_id;
 u_int      section_length;
 u_int      section_syntax_indicator;
 u_int      private_indicator;
 u_int	    sect_nr;
 u_int      last_sect_nr;



 out_nl (3,"DSM-CC-decoding....");
 table_id = outBit_S2x_NL (3,"Table_ID: ",	b, 0, 8,
				(char *(*)(u_long))dvbstrTableID );
 if (table_id < 0x3a || table_id > 0x3e) {
   out_nl (3,"wrong Table ID");
   return;
 }


 section_syntax_indicator =
	 outBit_Sx_NL (4,"Section_syntax_indicator: ",	b, 8, 1);
 private_indicator = 
	 outBit_Sx_NL (4,"private_indicator: ",		b, 9, 1);
 outBit_Sx_NL (6,"reserved_1: ",			b,10, 2);
 section_length =
	 outBit_Sx_NL (5,"dsmcc_section_length: ",	b,12,12);


 outBit_Sx_NL (3,"table_id_extension: ",		b,24,16);
 outBit_Sx_NL (6,"reserved_3: ",		b,40, 2);

 outBit_Sx_NL (3,"Version_number: ",		b,42, 5);
 outBit_S2x_NL(3,"Current_next_indicator: ",	b,47, 1,
			(char *(*)(u_long))dvbstrCurrentNextIndicator );

 sect_nr      = outBit_Sx_NL (3,"Section_number: ",		b,48, 8);
 last_sect_nr = outBit_Sx_NL (3,"Last_section_number: ",	b,56, 8);


 b += 8;
 len1 = section_length - 5 - 4;	    	// -4 == CRC/Checksum



 if (table_id == 0x3A) {

	llc_snap (3,b);		 	//  ISO/IEC 8802-2 

 } else if (table_id == 0x3B) {

	dsmcc_UserNetworkMessage (4, b, len1);

 } else if (table_id == 0x3C) {

	dsmcc_DownloadDataMessage (4, b, len1);

 } else if (table_id == 0x3D) {

	DSMCC_descriptor_list (b,len1);

 } else if (table_id == 0x3E) {	 	// $$$ Remark: DVB defines 0x3E as datagram!!

	 print_private_data (4, b, len1);

 }

 b += len1;



 outBit_Sx_NL (5, (section_syntax_indicator)
		   ?"CRC: " :"Checksum: ",	b,0,32);
}





/*
NOTE 1: The DownloadServerInitiate message, the DownloadInfoIndication
	message, and the DownloadCancel message are in the
	userNetworkMessage class.
NOTE 2: The DownloadDataBlock message is within the downloadMessage class.
*/



static void DSMCC_descriptor_list (u_char *b, int len)
{
   int x;

   while (len > 0) {
	  x = descriptor (b, DSMCC_STREAM);
	  b += x;
	  len -= x;
   }

}






/*
 * $$$ TODO
 *
 *
table_id_extension: This 16-bit field is set as shown below according to table_id field:
When the value of the table_id field equals 0x3B, this field must convey a copy of the least
significant two bytes of the transaction_id field .
When the value of the table_id field equals 0x3C, this field must convey a copy of the module_id
field.



B.2.4.3.4 DSM-CC sections for DSMCC_descriptor_list()
If the table_id .eld equals 0x3D the current_next_indicator bit shall be set to "1".
B.2.4.3.5 Encoding of table id extension
The section's table id extension .eld provides information on the stream descriptor(s)carried by the section:
Table B.31 :Encoding of table id extension for DSMCC_descriptor_lists
table_id_extension bits
Payload of DSM-CC section with table ID 0x3D
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