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TECHNICAL SPECIFICATION
Smart Cards;
Transport protocol for CAT applications;
Stage 2
(Release 12)
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Release 12 2 ETSI TS 102 127 V12.0.0 (2018-08)
Reference
RTS/SCP-T0015rcvc00
Keywords
protocol, smart card, transport
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ETSI
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Release 12 3 ETSI TS 102 127 V12.0.0 (2018-08)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 10
3 Definitions, symbols, abbreviations and coding conventions . 10
3.1 Definitions . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
3.4 Coding conventions . 11
4 Description . 12
5 CAT_TP layer . 13
5.0 Layers presentation. 13
5.1 Data communication. 13
5.2 Segmentation management . 13
5.2.1 Segmentation and re-assembly . 13
5.2.1.0 Segmentation behaviour . 13
5.2.1.1 N-SDU and N-PDU when segmentation is needed . 14
5.2.1.2 N-SDU and N-PDU when no segmentation . 14
5.2.2 Limitations . 14
5.2.3 CAT_TP segmentation management . 14
5.3 Transport management . 15
5.3.1 CAT_TP connection management . 15
5.3.1.0 Connection description . 15
5.3.1.1 Opening a connection . 16
5.3.1.2 Ports . 16
5.3.1.3 Connection states . 16
5.3.1.3.0 Connection states presentation . 16
5.3.1.3.1 CLOSED state . 17
5.3.1.3.2 LISTEN state . 17
5.3.1.3.3 SYN-SENT state . 17
5.3.1.3.4 SYN-RCVD state . 17
5.3.1.3.5 OPEN state . 17
5.3.1.3.6 CLOSE-WAIT state . 17
5.3.1.4 Connection record . 17
5.3.1.4.0 Overview . 17
5.3.1.4.1 STATE. 17
5.3.1.4.2 Variables for CAT_TP sending activity . 18
5.3.1.4.3 Variables for CAT_TP receiving activity . 18
5.3.1.4.4 Variables from current PDU . 18
5.3.1.4.5 Variables from SYN PDU . 18
5.3.1.5 Closing a connection . 18
5.3.1.6 Detecting a Half-Open and/or inactive connection . 19
5.3.1.7 Version Number Management . 19
5.3.2 Reliable Communication . 19
5.3.2.0 Reliability mechanisms . 19
5.3.2.1 Sequence number . 19
5.3.2.2 Checksum . 20
5.3.2.3 Positive acknowledgement of PDUs . 20
5.3.2.4 Retransmission timeout . 20
5.3.3 Flow control and window management . 21
5.4 Events processing . 21
ETSI
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Release 12 4 ETSI TS 102 127 V12.0.0 (2018-08)
5.4.0 Overview . 21
5.4.1 Upper layer events . 22
5.4.1.0 Introduction . 22
5.4.1.1 Open request . 23
5.4.1.2 Close request . 25
5.4.1.3 Receive request . 28
5.4.1.4 Send request . 30
5.4.2 PDU arrival events . 34
5.4.2.0 PDU pre-treatment . 34
5.4.2.1 Initial state: CLOSE . 34
5.4.2.2 Initial state: OPEN . 35
5.4.2.3 Initial state: LISTEN . 39
5.4.2.4 Initial state: SYN-SENT . 40
5.4.2.5 Initial state: SYN-RCVD . 41
5.4.2.6 Initial state: CLOSE-WAIT . 43
5.4.3 Timeout events . 44
5.4.3.0 Timeout description . 44
5.4.3.1 Retransmission timeout . 44
5.4.3.2 Close-wait timeout . 45
5.5 Identification . 45
5.6 CAT_TP header format . 46
5.6.0 CAT_TP header description . 46
5.6.1 First octet . 47
5.6.2 Header length . 47
5.6.3 Source and destination ports . 47
5.6.4 Data length . 48
5.6.5 Sequence number . 48
5.6.6 Acknowledgement number . 48
5.6.7 Window size . 48
5.6.8 Checksum . 48
5.6.9 Variable header area . 48
5.6.10 RFU field . 48
5.7 SYN PDU . 49
5.7.0 SYN PDU description . 49
5.7.1 SYN PDU fields . 49
5.7.1.1 Data length . 49
5.7.1.2 Sequence number . 49
5.7.1.3 Acknowledgment number . 49
5.7.1.4 Maximum PDU size . 50
5.7.1.5 Maximum SDU size . 50
5.7.1.6 Identification . 50
5.8 ACK PDU . 50
5.8.0 ACK PDU description . 50
5.8.1 ACK PDU field . 51
5.8.1.1 Data length . 51
5.8.1.2 Sequence number . 51
5.8.1.3 Acknowledgment number . 51
5.9 EACK PDU . 52
5.9.0 EACK PDU description . 52
5.9.1 EACK PDU Field . 53
5.9.1.1 Data length . 53
5.9.1.2 Sequence number . 53
5.9.1.3 Acknowledgment number . 53
5.9.1.4 Variable header area . 53
5.10 RST PDU. 54
5.10.0 RST PDU description . 54
5.10.1 RST PDU fields . 54
5.10.1.1 Data length . 54
5.10.1.2 Sequence number . 54
5.10.1.3 Acknowledgment number . 54
5.10.1.4 Reason code . 55
5.11 NUL PDU . 55
ETSI
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Release 12 5 ETSI TS 102 127 V12.0.0 (2018-08)
5.11.0 NUL PDU description . 55
5.11.1 NUL PDU fields . 56
5.11.1.1 Data length . 56
5.11.1.2 Sequence number . 56
5.11.1.3 Acknowledgment number . 56
5.11.1.4 Variable header area . 56
5.12 Header flags combinations . 57
6 Implementation on BIP . 58
6.1 Sending and receiving data . 58
6.2 Timers . 58
Annex A (informative): Scenarios examples . 59
A.1 Connection establishment. 59
A.2 Lost PDUs . 59
A.3 PDUs received out of order . 60
A.4 Communication over long delay path. 60
A.5 Communication over long delay path with lost PDUs . 61
A.6 Detecting a half open connection on crash recovery . 61
A.7 Detecting a half open connection from the active side . 62
A.8 Dynamic window management . 62
Annex B (informative): CAT_TP-Upper layer interface definition . 64
B.0 Introduction . 64
B.1 OPEN . 64
B.2 Send . 65
B.3 Receive . 65
B.4 CLOSE . 65
B.5 Status . 66
Annex C (informative): Change history . 67
History . 68
ETSI
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Release 12 6 ETSI TS 102 127 V12.0.0 (2018-08)
List of figures
Figure 1: Environment description .12
Figure 2: CAT_TP layer position .12
Figure 3: CAT_TP layer description .13
Figure 4: PDUs exchange between two Layers N .13
Figure 5: N-SDU and N-PDU with segmentation .14
Figure 6: N-SDU and N-PDU with no segmentation .14
Figure 7: Segmentation description .15
Figure 8: CAT_TP functional state machine .16
Figure 9: Open Request in OPEN, LISTEN, SYN-SENT, SYN-RCVD state .23
Figure 10: Open request in CLOSE-WAIT state .23
Figure 11: Open request in CLOSED state .24
Figure 12: Close request in Open state .25
Figure 13: Close request in CLOSE state .25
Figure 14: Close request in CLOSE-WAIT state .26
Figure 15: Close request in SYN-SENT or SYN-RCVD state .26
Figure 16: Close request in LISTEN state .27
Figure 17: Receive request in OPEN state .28
Figure 18: Receive request in CLOSE state .29
Figure 19: Receive request in CLOSE-WAIT state .29
Figure 20: Receive request in LISTEN, SYN-SENT or SYN-RCVD state .30
Figure 21: Send data request in OPEN state .31
Figure 21a: Send NUL request in OPEN state .32
Figure 22: Send request in CLOSE, LISTEN, SYN-SENT or SYN-RCVD state.33
Figure 23: Send request in CLOSE-WAIT state .33
Figure 24: CLOSE state PDU arrival event processing.34
Figure 25: OPEN state PDU arrival event processing 1/4 .35
Figure 26: OPEN state PDU arrival event processing 2/4 .
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