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LauszusLauszus
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Added comments for "SDP_ServiceSearchAttributeResponse"
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1 file changed

+88
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‎SPP.cpp

Lines changed: 88 additions & 75 deletions
Original file line numberDiff line numberDiff line change
@@ -538,15 +538,15 @@ void SPP::serviceNotSupported(uint8_t transactionIDHigh, uint8_t transactionIDLo
538538
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
539539
l2capoutbuf[1] = transactionIDHigh;
540540
l2capoutbuf[2] = transactionIDLow;
541-
l2capoutbuf[3] = 0x00; // Parameter Length
542-
l2capoutbuf[4] = 0x05; // Parameter Length
543-
l2capoutbuf[5] = 0x00; // AttributeListsByteCount
544-
l2capoutbuf[6] = 0x02; // AttributeListsByteCount
541+
l2capoutbuf[3] = 0x00; // MSB Parameter Length
542+
l2capoutbuf[4] = 0x05; // LSB Parameter Length = 5
543+
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
544+
l2capoutbuf[6] = 0x02; // LSB AttributeListsByteCount = 2
545545

546546
/* Attribute ID/Value Sequence: */
547-
l2capoutbuf[7] = 0x35;
548-
l2capoutbuf[8] = 0x00;
549-
l2capoutbuf[9] = 0x00;
547+
l2capoutbuf[7] = 0x35; // Data element sequence - length in next byte
548+
l2capoutbuf[8] = 0x00; // Length = 0
549+
l2capoutbuf[9] = 0x00; // No continuation state
550550

551551
SDP_Command(l2capoutbuf, 10);
552552
}
@@ -555,56 +555,60 @@ void SPP::serialPortResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLo
555555
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
556556
l2capoutbuf[1] = transactionIDHigh;
557557
l2capoutbuf[2] = transactionIDLow;
558-
l2capoutbuf[3] = 0x00; // Parameter Length
559-
l2capoutbuf[4] = 0x2B; // Parameter Length
560-
l2capoutbuf[5] = 0x00; // AttributeListsByteCount
561-
l2capoutbuf[6] = 0x26; // AttributeListsByteCount
558+
l2capoutbuf[3] = 0x00; // MSB Parameter Length
559+
l2capoutbuf[4] = 0x2B; // LSB Parameter Length = 43
560+
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
561+
l2capoutbuf[6] = 0x26; // LSB AttributeListsByteCount = 38
562562

563563
/* Attribute ID/Value Sequence: */
564-
l2capoutbuf[7] = 0x36;
565-
l2capoutbuf[8] = 0x00;
566-
l2capoutbuf[9] = 0x3C;
567-
l2capoutbuf[10] = 0x36;
568-
l2capoutbuf[11] = 0x00;
569-
570-
l2capoutbuf[12] = 0x39;
571-
l2capoutbuf[13] = 0x09;
572-
l2capoutbuf[14] = 0x00;
573-
l2capoutbuf[15] = 0x00;
574-
l2capoutbuf[16] = 0x0A;
575-
l2capoutbuf[17] = 0x00;
564+
l2capoutbuf[7] = 0x36; // Data element sequence - length in next two bytes
565+
l2capoutbuf[8] = 0x00; // MSB Length
566+
l2capoutbuf[9] = 0x3C; // LSB Length = 60
567+
568+
l2capoutbuf[10] = 0x36; // Data element sequence - length in next two bytes
569+
l2capoutbuf[11] = 0x00; // MSB Length
570+
l2capoutbuf[12] = 0x39; // LSB Length = 57
571+
572+
l2capoutbuf[13] = 0x09; // Unsigned Integer - length 2 bytes
573+
l2capoutbuf[14] = 0x00; // MSB ServiceRecordHandle
574+
l2capoutbuf[15] = 0x00; // LSB ServiceRecordHandle
575+
l2capoutbuf[16] = 0x0A; // Unsigned int - length 4 bytes
576+
l2capoutbuf[17] = 0x00; // ServiceRecordHandle value - TODO: Is this related to HCI_Handle?
576577
l2capoutbuf[18] = 0x01;
577578
l2capoutbuf[19] = 0x00;
578579
l2capoutbuf[20] = 0x06;
579-
l2capoutbuf[21] = 0x09;
580-
l2capoutbuf[22] = 0x00;
581-
l2capoutbuf[23] = 0x01;
582-
l2capoutbuf[24] = 0x35;
583-
l2capoutbuf[25] = 0x03;
584-
l2capoutbuf[26] = 0x19;
585-
l2capoutbuf[27] = 0x11;
586-
587-
l2capoutbuf[28] = 0x01;
588-
l2capoutbuf[29] = 0x09;
589-
l2capoutbuf[30] = 0x00;
590-
l2capoutbuf[31] = 0x04;
591-
l2capoutbuf[32] = 0x35;
592-
l2capoutbuf[33] = 0x0C;
593-
l2capoutbuf[34] = 0x35;
594-
l2capoutbuf[35] = 0x03;
595-
l2capoutbuf[36] = 0x19;
596-
l2capoutbuf[37] = 0x01;
597-
l2capoutbuf[38] = 0x00;
598-
l2capoutbuf[39] = 0x35;
599-
l2capoutbuf[40] = 0x05;
600-
l2capoutbuf[41] = 0x19;
601-
l2capoutbuf[42] = 0x00;
602-
l2capoutbuf[43] = 0x03;
603-
604-
l2capoutbuf[44] = 0x08;
605-
l2capoutbuf[45] = 0x02; // Two extra bytes
606-
l2capoutbuf[46] = 0x00; // 25 (0x19) more bytes to come
607-
l2capoutbuf[47] = 0x19;
580+
581+
l2capoutbuf[21] = 0x09; // Unsigned Integer - length 2 bytes
582+
l2capoutbuf[22] = 0x00; // MSB ServiceClassIDList
583+
l2capoutbuf[23] = 0x01; // LSB ServiceClassIDList
584+
l2capoutbuf[24] = 0x35; // Data element sequence - length in next byte
585+
l2capoutbuf[25] = 0x03; // Length = 3
586+
l2capoutbuf[26] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
587+
l2capoutbuf[27] = 0x11; // MSB SerialPort
588+
l2capoutbuf[28] = 0x01; // LSB SerialPort
589+
590+
l2capoutbuf[29] = 0x09; // Unsigned Integer - length 2 bytes
591+
l2capoutbuf[30] = 0x00; // MSB ProtocolDescriptorList
592+
l2capoutbuf[31] = 0x04; // LSB ProtocolDescriptorList
593+
l2capoutbuf[32] = 0x35; // Data element sequence - length in next byte
594+
l2capoutbuf[33] = 0x0C; // Length = 12
595+
596+
l2capoutbuf[34] = 0x35; // Data element sequence - length in next byte
597+
l2capoutbuf[35] = 0x03; // Length = 3
598+
l2capoutbuf[36] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
599+
l2capoutbuf[37] = 0x01; // MSB L2CAP
600+
l2capoutbuf[38] = 0x00; // LSB L2CAP
601+
602+
l2capoutbuf[39] = 0x35; // Data element sequence - length in next byte
603+
l2capoutbuf[40] = 0x05; // Length = 5
604+
l2capoutbuf[41] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
605+
l2capoutbuf[42] = 0x00; // MSB RFCOMM
606+
l2capoutbuf[43] = 0x03; // LSB RFCOMM
607+
l2capoutbuf[44] = 0x08; // Unsigned Integer - length 1 byte
608+
609+
l2capoutbuf[45] = 0x02; // ContinuationState - Two more bytes
610+
l2capoutbuf[46] = 0x00; // MSB length
611+
l2capoutbuf[47] = 0x19; // LSB length = 25 more bytes to come
608612

609613
SDP_Command(l2capoutbuf, 48);
610614
}
@@ -613,40 +617,49 @@ void SPP::serialPortResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLo
613617
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
614618
l2capoutbuf[1] = transactionIDHigh;
615619
l2capoutbuf[2] = transactionIDLow;
616-
l2capoutbuf[3] = 0x00; // Parameter Length
617-
l2capoutbuf[4] = 0x1C; // Parameter Length
618-
l2capoutbuf[5] = 0x00; // AttributeListsByteCount
619-
l2capoutbuf[6] = 0x19; // AttributeListsByteCount
620+
l2capoutbuf[3] = 0x00; // MSB Parameter Length
621+
l2capoutbuf[4] = 0x1C; // LSB Parameter Length = 28
622+
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
623+
l2capoutbuf[6] = 0x19; // LSB AttributeListsByteCount = 25
620624

621625
/* Attribute ID/Value Sequence: */
622-
l2capoutbuf[7] = 0x01;
623-
l2capoutbuf[8] = 0x09;
624-
l2capoutbuf[9] = 0x00;
625-
l2capoutbuf[10] = 0x06;
626-
l2capoutbuf[11] = 0x35;
627-
628-
l2capoutbuf[12] = 0x09;
629-
l2capoutbuf[13] = 0x09;
630-
l2capoutbuf[14] = 0x65;
631-
l2capoutbuf[15] = 0x6E;
632-
l2capoutbuf[16] = 0x09;
633-
l2capoutbuf[17] = 0x00;
634-
l2capoutbuf[18] = 0x6A;
635-
l2capoutbuf[19] = 0x09;
626+
l2capoutbuf[7] = 0x01; // Channel 1 - TODO: Try different values, so multiple servers can be used at once
627+
628+
l2capoutbuf[8] = 0x09; // Unsigned Integer - length 2 bytes
629+
l2capoutbuf[9] = 0x00; // MSB LanguageBaseAttributeIDList
630+
l2capoutbuf[10] = 0x06; // LSB LanguageBaseAttributeIDList
631+
l2capoutbuf[11] = 0x35; // Data element sequence - length in next byte
632+
l2capoutbuf[12] = 0x09; // Length = 9
633+
634+
// Identifier representing the natural language = en = English - see: "ISO 639:1988"
635+
l2capoutbuf[13] = 0x09; // Unsigned Integer - length 2 bytes
636+
l2capoutbuf[14] = 0x65; // 'e'
637+
l2capoutbuf[15] = 0x6E; // 'n'
638+
639+
// "The second element of each triplet contains an identifier that specifies a character encoding used for the language"
640+
// Encoding is set to 106 (UTF-8) - see: http://www.iana.org/assignments/character-sets/character-sets.xhtml
641+
l2capoutbuf[16] = 0x09; // Unsigned Integer - length 2 bytes
642+
l2capoutbuf[17] = 0x00; // MSB of character encoding
643+
l2capoutbuf[18] = 0x6A; // LSB of character encoding (106)
644+
645+
// Attribute ID that serves as the base attribute ID for the natural language in the service record
646+
// "To facilitate the retrieval of human-readable universal attributes in a principal language, the base attribute ID value for the primary language supported by a service record shall be 0x0100"
647+
l2capoutbuf[19] = 0x09; // Unsigned Integer - length 2 bytes
636648
l2capoutbuf[20] = 0x01;
637649
l2capoutbuf[21] = 0x00;
638-
l2capoutbuf[22] = 0x09;
639-
l2capoutbuf[23] = 0x01;
640-
l2capoutbuf[24] = 0x00;
641-
l2capoutbuf[25] = 0x25;
642650

651+
l2capoutbuf[22] = 0x09; // Unsigned Integer - length 2 bytes
652+
l2capoutbuf[23] = 0x01; // MSB ServiceDescription
653+
l2capoutbuf[24] = 0x00; // LSB ServiceDescription
654+
655+
l2capoutbuf[25] = 0x25; // Text string - length in next byte
643656
l2capoutbuf[26] = 0x05; // Name length
644657
l2capoutbuf[27] = 'T';
645658
l2capoutbuf[28] = 'K';
646659
l2capoutbuf[29] = 'J';
647660
l2capoutbuf[30] = 'S';
648661
l2capoutbuf[31] = 'P';
649-
l2capoutbuf[32] = 0x00; // No more data
662+
l2capoutbuf[32] = 0x00; // No continuation state
650663

651664
SDP_Command(l2capoutbuf, 33);
652665
}

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