教案成果入门测试mblb for unionpay fixed length message

1、Ping XiongJun 20132 F5 Networks, Inc.Agenda Technical Background for Online Transaction Interface Overall structure ISO8583 Fixed Length Message MBLB for Fixed Length Message Handling half-duplex, asynchronous messages iRules Collect data Get message length, make sure the full message captured Get t

2、he sequence # for reference Dispatch the response message to proper sender3 F5 Networks, Inc.4 F5 Networks, Inc.Technical Specification Long life TCP connections Half-Duplex Communication Overall Message structureMessage Length(4 Bytes)Message Body005050 bytes message body (8583 or Fixed Length)Exam

3、pleData Structure5 F5 Networks, Inc.ISO8583 Message Structure Message HeaderMessage HeaderMessage Type IDBitmapMessage FieldsFieldField NameLength（Byte）Field1Header Length1Field2Header Flag and Version1Field3Total Message Length4Field4Destination ID11Field5Source ID11Field6Message Status Flags3Field

4、7Batch Number1Field8Reserved for Use8Field9User Info16 F5 Networks, Inc.ISO8583 Other useful fields Field 7: TRANSMISSION-DATE-AND-TIME, 10 bytes Field 11: SYSTEM-TRACE-AUDIT-NUMBER, 6 Bytes Field 32: ACQUIRING-INSTITUTION-IDENTIFICAT ION-CODE, 11 bytes Field 7, 11 and 32 compose a unique ID for a t

5、ransaction We can use this unique ID to track a transaction7 F5 Networks, Inc.Fixed Length Message For Counter Transaction, Phone Banking, Call Center Useful Information Message Length, the first 4 bytes Field 7: Transaction Sequence Number Example: Credit Account Inquiry RequestField NameVariableFo

6、rmat Remarks1Transaction CodeTRXTYPEN (4)30012Response CodeRETCODE A(6)3Bank NumberBNKNBRA(4)4Transaction Source SOURCEA(2)5Branch NumberBRN_NON(6)6Operator NumberOPE_NON(6)7Sequence NumberSEQNON(6)8Card NumberCARDNOA(19)9PIN FlagPIN_FLAG A(1)10 PasswordA(8)8 F5 Networks, Inc.9 F5 Networks, Inc.WANH

7、andling Half-Duplex, Asynchronous Message We can use Field7, Sequence Number, to track the message Here is the iRulesCUP FE VIPRIONBank AFEBank AFECUP DataBank LANvs cup_fevs bank_afeRequest_nResponse_n10 F5 Networks, Inc.iRules Collecting message data, make sure the full message captured # Get firs

8、t 4 bytes for the length of the message# Get data count, 1-4 Bytes, then turn it into integerset bitVal substr $payloadbit 0 32set len binary format B* $bitValset nlen expr expr substr $len 0 1 * 1000 + expr substr $len 1 1 * 100 + expr substr $len 2 1 * 10 + expr substr $len 3 1log Mess

9、age Length:$nlenif $tcplen expr $nlen + 4 # more packets in the message, need to collect more datalog payload length is $tcplen, continue to collect .TCP:collect11 F5 Networks, Inc.iRules When full message captured, get field7 for reference else # data collection finished, start to proce

10、ss .set ascii7 substr TCP:payload 32 6set tkey $ascii7log Field7 SEQNO: $ascii712 F5 Networks, Inc.iRules Select proper pool member based on field7(sequence #) content# client Select, for VS which receive Unionpay response dataif $rflag = 1 if table lookup -subtable UNIONPAYFIXED -notouch $tkey eq $ippos pool $static:Recive_Pool member $ippos else pool $static:Recive_Poolelseif $rflag = 0 table set -subtable UNION