/*$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   Rainer.Scherg@gmx.de (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  rascsection decoding functions renamed due to preparation of private structuresRevision 1.9  2004/02/15 18:58:27  rascDSM-CC  data/object carousell continued   (DSI, DII, DDB, DCancel)Revision 1.8  2004/02/15 01:01:00  rascDSM-CC  DDB (DownloadDataBlock Message)DSM-CC  U-N-Message  startedCarousel Descriptors completedRevision 1.7  2004/02/14 01:24:44  rascDSM-CC started  (DSI/DII, DDB)Revision 1.6  2004/01/22 22:26:34  rascpes_pack_headersection read timeoutRevision 1.5  2004/01/02 22:25:34  rascDSM-CC  MODULEs descriptors completeRevision 1.4  2004/01/02 16:40:33  rascDSM-CC  INT/UNT descriptors completeminor changes and fixesRevision 1.3  2004/01/01 20:09:16  rascDSM-CC INT/UNT descriptorsPES-sync changed, TS sync changed,descriptor scopeother changesRevision 1.2  2003/12/27 14:35:00  rascdvb-t descriptorsDSM-CC: SSU Linkage/DataBroadcast descriptorsRevision 1.1  2003/12/27 00:21:16  rascdsmcc 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 leastsignificant 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_idfield.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 extensionThe 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_liststable_id_extension bitsPayload of DSM-CC section with table ID 0x3D[15 ][14 ][13