void section_DSMCC_DATAGRAM (u_char *b, int len)
{
/* EN 301 192 7.x */
// $$$ TODO this differs from ISO/IEC 13818-6:1998 AMD_1_2000_Cor_1_2002
typedef struct _DATAGRAM {
u_int table_id;
u_int section_syntax_indicator;
u_int private_indicator;
u_int reserved_1;
u_int section_length;
u_int MAC_addr6;
u_int MAC_addr5;
u_int reserved_2;
u_int payload_scrambling_control;
u_int address_scrambling_control;
u_int LLC_SNAP_flag;
u_int current_next_indicator;
u_int section_number;
u_int last_section_number;
u_int MAC_addr4;
u_int MAC_addr3; // MAC-Bits: MSB first order
u_int MAC_addr2;
u_int MAC_addr1;
// conditional
// LLC SNAP according ISO 8802-2
// N ip datagram bytes
u_int ip_datagram_data_bytes;
// conditional
u_int stuffing_bytes;
// conditional
unsigned long crc_checksum;
} DATAGRAM;
DATAGRAM d;
int len1;
d.table_id = b[0];
d.section_syntax_indicator = getBits (b, 0, 8, 1);
d.private_indicator = getBits (b, 0, 9, 1); // $$$ TODO error indicator
d.reserved_1 = getBits (b, 0, 10, 2);
d.section_length = getBits (b, 0, 12, 12);
d.MAC_addr6 = getBits (b, 0, 24, 8);
d.MAC_addr5 = getBits (b, 0, 32, 8);
d.reserved_2 = getBits (b, 0, 40, 2);
d.payload_scrambling_control = getBits (b, 0, 42, 2);
d.address_scrambling_control = getBits (b, 0, 44, 2);
d.LLC_SNAP_flag = getBits (b, 0, 46, 1);
d.current_next_indicator = getBits (b, 0, 47, 1);
d.section_number = getBits (b, 0, 48, 8);
d.last_section_number = getBits (b, 0, 56, 8);
d.MAC_addr4 = getBits (b, 0, 64, 8);
d.MAC_addr3 = getBits (b, 0, 72, 8);
d.MAC_addr2 = getBits (b, 0, 80, 8);
d.MAC_addr1 = getBits (b, 0, 88, 8);
// MAC-Bits: MSB first !
b += 12;
len1 = d.section_length - 9;
out_nl (3,"DSM-CC DATAGRAM-decoding....");
out_S2B_NL (3,"Table_ID: ",d.table_id, dvbstrTableID (d.table_id));
if (d.table_id != 0x3e) {
out_nl (3,"wrong Table ID");
return;
}
out_SB_NL (3,"section_syntax_indicator: ",d.section_syntax_indicator);
out_SB_NL (3,"private_indicator: ",d.private_indicator);
out_SB_NL (6,"reserved_1: ",d.reserved_1);
out_SW_NL (5,"Section_length: ",d.section_length);
out_SB_NL (5,"MACaddrbyte/DevicdID 6: ",d.MAC_addr6);
out_SB_NL (5,"MACaddrbyte/DeviceID 5: ",d.MAC_addr5);
out_SB_NL (6,"reserved_2: ",d.reserved_2);
out_S2B_NL (3,"payload_scrambling_control: ",d.payload_scrambling_control,
dsmccStrPayload_scrambling_control(d.payload_scrambling_control));
out_S2B_NL (3,"address_scrambling_control: ",d.address_scrambling_control,
dsmccStrAddress_scrambling_control(d.address_scrambling_control));
out_SB_NL (3,"LLC_SNAP_flag: ",d.LLC_SNAP_flag);
out_S2B_NL(3,"current_next_indicator: ",d.current_next_indicator, dvbstrCurrentNextIndicator(d.current_next_indicator));
out_SB_NL (3,"Section_number: ",d.section_number);
out_SB_NL (3,"Last_Section_number: ",d.last_section_number);
out_SB_NL (5,"MACaddrbyte/DeviceID 4: ",d.MAC_addr4);
out_SB_NL (5,"MACaddrbyte/DeviceID 3: ",d.MAC_addr3);
out_SB_NL (5,"MACaddrbyte/DeviceID 2: ",d.MAC_addr2);
out_SB (5,"MACaddrbyte/DeviceID 1: ",d.MAC_addr1);
out_nl (3," => MAC-Address/DeviceID: %02x:%02x:%02x:%02x:%02x:%02x",
d.MAC_addr1,d.MAC_addr2,d.MAC_addr3,
d.MAC_addr4,d.MAC_addr5,d.MAC_addr6);
if (d.LLC_SNAP_flag == 0x01) {
/* ISO/IEC 8802-2 */
int k;
k = llc_snap (4, b);
} else {
net_IP_data (4, b, len1-4);
}
b += (len1 - 4);
outBit_Sx_NL (5, (d.section_syntax_indicator)
?"CRC: " :"Checksum: ", b,0,32);
}
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);
}
