Error - org.jpos.iso.IFA_LLNUM: Problem unpacking field 2

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mwyc...@gmail.com

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Jul 10, 2019, 10:42:11 AM7/10/19
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Hellos,

Please advise me on this;
I have some Postilion ASCII implementation, but of recent I started getting this error and have failed to figure it out.

It happens for 0800 messages, I wonder why since 0800 have no field 2.



<log realm="channel/192.168.1.254:2197" at="Wed Jul 10 16:44:05 EAT 2019.169" lifespan="10498ms">
  <receive>
    <iso-exception>
      org.jpos.iso.IFA_LLNUM: Problem unpacking field 2
      <nested-exception>
      java.lang.NegativeArraySizeException
at org.jpos.iso.AsciiInterpreter.uninterpret(AsciiInterpreter.java:53)
at org.jpos.iso.ISOStringFieldPackager.unpack(ISOStringFieldPackager.java:173)
at org.jpos.iso.ISOBasePackager.unpack(ISOBasePackager.java:233)
at org.jpos.iso.ISOMsg.unpack(ISOMsg.java:416)
at org.jpos.iso.BaseChannel.unpack(BaseChannel.java:901)
at org.jpos.iso.BaseChannel.receive(BaseChannel.java:669)
at org.jpos.iso.ISOServer$Session.run(ISOServer.java:131)
at org.jpos.util.ThreadPool$PooledThread.run(ThreadPool.java:71)
      </nested-exception>
      org.jpos.iso.ISOException: org.jpos.iso.IFA_LLNUM: Problem unpacking field 2 (java.lang.NegativeArraySizeException)
at org.jpos.iso.ISOStringFieldPackager.unpack(ISOStringFieldPackager.java:178)
at org.jpos.iso.ISOBasePackager.unpack(ISOBasePackager.java:233)
at org.jpos.iso.ISOMsg.unpack(ISOMsg.java:416)
at org.jpos.iso.BaseChannel.unpack(BaseChannel.java:901)
at org.jpos.iso.BaseChannel.receive(BaseChannel.java:669)
at org.jpos.iso.ISOServer$Session.run(ISOServer.java:131)
at org.jpos.util.ThreadPool$PooledThread.run(ThreadPool.java:71)
Nested:java.lang.NegativeArraySizeException
at org.jpos.iso.AsciiInterpreter.uninterpret(AsciiInterpreter.java:53)
at org.jpos.iso.ISOStringFieldPackager.unpack(ISOStringFieldPackager.java:173)
at org.jpos.iso.ISOBasePackager.unpack(ISOBasePackager.java:233)
at org.jpos.iso.ISOMsg.unpack(ISOMsg.java:416)
at org.jpos.iso.BaseChannel.unpack(BaseChannel.java:901)
at org.jpos.iso.BaseChannel.receive(BaseChannel.java:669)
at org.jpos.iso.ISOServer$Session.run(ISOServer.java:131)
at org.jpos.util.ThreadPool$PooledThread.run(ThreadPool.java:71)
    </iso-exception>
    --- data ---
    0000  F0 F8 F0 F0 F8 F2 F2 F0  F0 F0 F0 F0 F0 F0 F0 F0  ................
0010  F0 F0 F0 F0 F0 F4 F0 F0  F0 F0 F0 F0 F0 F0 F0 F0  ................
0020  F0 F0 F0 F0 F0 F7 F1 F0  F0 F4 F4 F4 F3 F3 F0 F4  ................
0030  F4 F4 F3 F3 F0 F0 F1                              .......

Attached a copy of the packager am using;


thanks
postpack.xml

Andy Orrock

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Jul 10, 2019, 10:46:57 AM7/10/19
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Hi.

Your trace shows that your implementation is EBCDIC display.  Your packager is ASCII display.  All hell is gonna break loose on the unpackaging. And it did.

Andy

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chhil

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Jul 10, 2019, 12:38:52 PM7/10/19
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If it was working and has stopped working , talk to the Postilion guys, there usually is a parameter for their source/sink nodes to set the appropriate character set to use. 
-chhil. 

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Mutumba Wycliff

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Jul 11, 2019, 1:43:37 AM7/11/19
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Thanks Chillum,

Let me confirm with the Switch people if they could have changed to another character set.
I know they support both EBCDIC and ASCII character sets.

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Mutumba Wycliff

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Jul 11, 2019, 1:46:25 AM7/11/19
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Thanks Andy,

True, its possible the switch people have changed to EBCDIC.

Let me confirm with them, because initially we have been using ASCII.

Warm regards,

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Kogan Moonsamy

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Jul 11, 2019, 3:51:33 AM7/11/19
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Hi There,

If I remember correctly Postillion uses its own flavour of the ACI 8583 ISO spec and in that spec, and 0800 message is a network message (used for sign-on's, echos, sign-off's, etc). As such, the 0800 does not contain DE2, which is reserved for a financial/advise message (0200, 0220, 0420) and should contain the PAN or card number.

Hope this helps.

K

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Mutumba Wycliff

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Jul 11, 2019, 8:45:39 AM7/11/19
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Hellos,

There is a change in the Character Set, test environment was on ASCII while production was on EBCDIC.
So this was corrected. However, I still got another error - org.jpos.iso.IFA_LLLLLLBINARY: Problem unpacking field 0

<session-error>
    <iso-exception>
      org.jpos.iso.IFA_LLLLLLBINARY: Problem unpacking field 0
      <nested-exception>
      java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at org.jpos.iso.LiteralBinaryInterpreter.uninterpret(LiteralBinaryInterpreter.java:55)
        at org.jpos.iso.ISOBinaryFieldPackager.unpack(ISOBinaryFieldPackager.java:140)

I suspect its coming from the nested field 127

Here is what the switch is sending me;

0200:
   [LLVAR  n    ..19 016] 002 [5057970000000005]
   [Fixed  n       6 006] 003 [311000]
   [None   n         012] 004 [000000200000]
   [Fixed  n      10 010] 007 [0711150526]
   [Fixed  n       6 006] 011 [000122]
   [Fixed  n       6 006] 012 [150526]
   [Fixed  n       4 004] 013 [0711]
   [Fixed  n       4 004] 014 [2104]
   [Fixed  n       4 004] 015 [0711]
   [Fixed  n       4 004] 018 [6011]
   [Fixed  n       3 003] 022 [901]
   [Fixed  n       2 002] 025 [00]
   [Fixed  n       2 002] 026 [04]
   [Fixed  x+n     9 009] 028 [D00080000]
   [Fixed  x+n     9 009] 030 [D00040000]
   [LLVAR  n    ..11 006] 032 [123456]
   [LLVAR  n    ..11 006] 033 [123456]
   [LLVAR  ans  ..37 033] 035 [5057970000000005D2104501015918348]
   [Fixed  an     12 012] 037 [000000348630]
   [Fixed  ans     8 008] 041 [1000T001]
   [Fixed  ans    15 015] 042 [1000T0010000000]
   [Fixed  ans    40 040] 043 [BALANCE INQUIRY SERVICE             KAUG]
   [Fixed  a/n     3 003] 049 [800]
   [LLLVAR ans ..999 004] 056 [1510]
   [LLVAR  ans  ..28 014] 102 [00200300000008]
   [LLLVAR ans ..999 015] 123 [510101211344102]
   [LLVAR  ans  ..32 010] 127.002 [0000348630]
   [Fixed  ans*   48 048] 127.003 [ISWATMS     EFCsink     000122000122EFCGroup    ]
   [LLVAR  ans  ..32 010] 127.011 [0000348629]
   [Fixed  n       8 008] 127.020 [20180921]
   [LLVAR  ans  ..20 007] 127.026 [EFCsink] 

And in my packager this is how I have 127 defined;

<isofieldpackager
      id="127"  
      length="999999"
      name="RESERVED PRIVATE USE"
      class="org.jpos.iso.IFA_LLLLLLBINARY"
      packager="org.jpos.iso.packager.PostPackager">
<!-- packager="org.jpos.iso.packager.GenericSubFieldPackager" -->
      <isofield
          id="0"
          length="0"
          name="PLACEHOLDER"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
      id="1"
      length="8"
      name="BIT MAP"
      class="org.jpos.iso.IFB_BITMAP"/>
      <isofield
          id="2"
          length="32"
          name="SWITCH KEY"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="3"
          length="48"
          name="ROUTING INFORMATION"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="4"
          length="22"
          name="POS DATA"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="5"
          length="73"
          name="SERVICE STATION DATA"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="6"
          length="2"
          name="AUTHORIZATION PROFILE"
          class="org.jpos.iso.IFA_NUMERIC"/>
      <isofield
          id="7"
          length="50"
          name="CHECK DATA"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="8"
          length="128"
          name="RETENTION DATA"
          class="org.jpos.iso.IFA_LLLCHAR"/>
      <isofield
          id="9"
          length="255"
          name="ADDITIONAL NODE DATA"
          class="org.jpos.iso.IFA_LLLCHAR"/>
      <isofield
          id="10"
          length="3"
          name="CVV2"
          class="org.jpos.iso.IFA_NUMERIC"/>
      <isofield
          id="11"
          length="32"
          name="ORIGINAL KEY"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="12"
          length="25"
          name="TERMINAL OWNDER"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="13"
          length="17"
          name="POS GEOGRAPHIC DATA"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="14"
          length="8"
          name="SPONSOR BANK"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="15"
          length="29"
          name="AVS REQUEST"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="16"
          length="1"
          name="AVS RESPONSE"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="17"
          length="50"
          name="CARDHOLDER INFORMATION"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="18"
          length="50"
          name="VALIDATION DATA"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="19"
          length="45"
          name="BANK DETAILS"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="20"
          length="8"
          name="AUTHORIZER DATE SETTLEMENT"
          class="org.jpos.iso.IFA_NUMERIC"/>
      <isofield
          id="21"
          length="12"
          name="RECORD IDENTIFICATION"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="22"
          length="99999"
          name="STRUCTURED DATA"
          class="org.jpos.iso.IFA_LLLLLCHAR"/>
      <isofield
          id="23"
          length="253"
          name="PAYEE NAME AND ADDRESS"
          class="org.jpos.iso.IF_CHAR"/>
      <isofield
          id="24"
          length="28"
          name="PAYER ACCOUNT INFORMATION"
          class="org.jpos.iso.IFA_LLCHAR"/>
      <isofield
          id="25"
          length="8000"
          name="ICC DATA"
          class="org.jpos.iso.IFA_LLLLCHAR"/>
  </isofieldpackager>


Could it be the 127 field definition that could be causing the crash?

thanks

On Wed, Jul 10, 2019 at 7:38 PM chhil <chi...@gmail.com> wrote:
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chhil

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Jul 11, 2019, 9:02:22 AM7/11/19
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Your best bet is to verify what the LL* definition is for field 127 from the Postbridge spec or get them to send the hexdump of the message and you can infer the length from it.

-chhil

-chhil 

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Mutumba Wycliff

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Jul 11, 2019, 9:46:12 AM7/11/19
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Thanks,

Below is the hexdump, unfortunately don't know how to infer the length from it;

0200:
[LLVAR n ..19 016] 002 [5057970000000005]
[Fixed n 6 006] 003 [311000]
[None n 012] 004 [000000200000]
[Fixed n 10 010] 007 [0711155406]
[Fixed n 6 006] 011 [242432]
[Fixed n 6 006] 012 [155406]
[Fixed n 4 004] 013 [0711]
[Fixed n 4 004] 014 [2104]
[Fixed n 4 004] 015 [0711]
[Fixed n 4 004] 018 [6011]
[Fixed n 3 003] 022 [901]
[Fixed n 2 002] 025 [00]
[Fixed n 2 002] 026 [04]
[Fixed x+n 9 009] 028 [D00080000]
[Fixed x+n 9 009] 030 [D00040000]
[LLVAR n ..11 006] 032 [123456]
[LLVAR n ..11 006] 033 [123456]
[LLVAR ans ..37 033] 035 [5057970000000005=2104501015918348]
[Fixed an 12 012] 037 [000000348641]
[Fixed ans 8 008] 041 [1000T001]
[Fixed ans 15 015] 042 [1000T0010000000]
[Fixed ans 40 040] 043 [NAKASERO PLOT 2B KAMP KAUG]
[Fixed a/n 3 003] 049 [800]
[LLLVAR ans ..999 004] 056 [1510]
[LLVAR ans ..28 014] 102 [00200300000008]
[LLLVAR ans ..999 015] 123 [510101211344102]
[LLVAR ans ..32 010] 127.002 [0000348641]
[Fixed ans* 48 048] 127.003 [ISWATMS EFCsink 242432242432EFCGroup ]
[LLLVAR ans ..999 007] 127.009 [9840001]
[LLVAR ans ..32 010] 127.011 [0000348640]
[Fixed ans 31 031] 127.019 [PAYMENTSSSSSSSSSSSSSSSSSSSSSSSS]
[Fixed n 8 008] 127.020 [20180921]
[LLVAR ans ..20 007] 127.026 [EFCsink]
binary data
0000(0000) 30 32 30 30 46 32 33 45 34 34 44 35 41 38 45 30 0200F23E44D5A8E0
0016(0010) 38 31 30 30 30 30 30 30 30 30 30 30 30 34 30 30 8100000000000400
0032(0020) 30 30 32 32 31 36 35 30 35 37 39 37 30 30 30 30 0022165057970000
0048(0030) 30 30 30 30 30 35 33 31 31 30 30 30 30 30 30 30 0000053110000000
0064(0040) 30 30 32 30 30 30 30 30 30 37 31 31 31 35 35 34 0020000007111554
0080(0050) 30 36 32 34 32 34 33 32 31 35 35 34 30 36 30 37 0624243215540607
0096(0060) 31 31 32 31 30 34 30 37 31 31 36 30 31 31 39 30 1121040711601190
0112(0070) 31 30 30 30 34 44 30 30 30 38 30 30 30 30 44 30 10004D00080000D0
0128(0080) 30 30 34 30 30 30 30 30 36 31 32 33 34 35 36 30 0040000061234560
0144(0090) 36 31 32 33 34 35 36 33 33 35 30 35 37 39 37 30 6123456335057970
0160(00A0) 30 30 30 30 30 30 30 30 35 3D 32 31 30 34 35 30 000000005=210450
0176(00B0) 31 30 31 35 39 31 38 33 34 38 30 30 30 30 30 30 1015918348000000
0192(00C0) 33 34 38 36 34 31 31 30 30 30 54 30 30 31 31 30 3486411000T00110
0208(00D0) 30 30 54 30 30 31 30 30 30 30 30 30 30 4E 41 4B 00T0010000000NAK
0224(00E0) 41 53 45 52 4F 20 50 4C 4F 54 20 32 42 20 20 20 ASERO PLOT 2B
0240(00F0) 20 20 4B 41 4D 50 20 20 20 20 20 20 20 20 20 20 KAMP
0256(0100) 20 4B 41 55 47 38 30 30 30 30 34 31 35 31 30 31 KAUG80000415101
0272(0110) 34 30 30 32 30 30 33 30 30 30 30 30 30 30 38 30 4002003000000080
0288(0120) 31 35 35 31 30 31 30 31 32 31 31 33 34 34 31 30 1551010121134410
0304(0130) 32 31 33 38 60 A0 30 40 00 00 00 00 31 30 30 30 2138`.0@....1000
0320(0140) 30 30 33 34 38 36 34 31 49 53 57 41 54 4D 53 20 00348641ISWATMS
0336(0150) 20 20 20 20 45 46 43 73 69 6E 6B 20 20 20 20 20 EFCsink
0352(0160) 32 34 32 34 33 32 32 34 32 34 33 32 45 46 43 47 242432242432EFCG
0368(0170) 72 6F 75 70 20 20 20 20 30 30 37 39 38 34 30 30 roup 00798400
0384(0180) 30 31 31 30 30 30 30 30 33 34 38 36 34 30 50 41 01100000348640PA
0400(0190) 59 4D 45 4E 54 53 53 53 53 53 53 53 53 53 53 53 YMENTSSSSSSSSSSS
0416(01A0) 53 53 53 53 53 53 53 53 53 53 53 53 53 32 30 31 SSSSSSSSSSSSS201
0432(01B0) 38 30 39 32 31 30 37 45 46 43 73 69 6E 6B 8092107EFCsink

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chhil

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Jul 12, 2019, 3:17:09 AM7/12/19
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From your postilion logs, field 127 starts with 
[LLVAR ans ..32 010] 127.002 [0000348641]

So this will be preceded by LL so 10 + 0000348641 forms 127.2

The field prior to 127 is 123
[LLLVAR ans ..999 015] 123 [510101211344102]

So any data between them is the length plus bitmap. Look for data between 102 and 00003

Based on this if we can determine the length
+bitmap, its the data in  
0304(0130) 32 31 33 38 60 A0 30 40 00 00 00 00 31 30 30 30 2138`.0@....1000
The 2 that it begins with is part of the 102.

To be more specific length + bitmap is  31 33 38 60 A0 30 40 00 00 00 00 [Ascii 138`.0@....]
Thats the length of 138 plus bitmap. Length is ascii, so I assume thats 138 [LLL] and not in the form LLLLLL. Then there are 8 bytes of bitmap

0272(0110) 34 30 30 32 30 30 33 30 30 30 30 30 30 30 38 30 4002003000000080
0288(0120) 31 35 35 31 30 31 30 31 32 31 31 33 34 34 31 30 1551010121134410
0304(0130) 32 31 33 38 60 A0 30 40 00 00 00 00 31 30 30 30 2138`.0@....1000
0320(0140) 30 30 33 34 38 36 34 31 49 53 57 41 54 4D 53 20 00348641ISWATMS 
0336(0150) 20 20 20 20 45 46 43 73 69 6E 6B 20 20 20 20 20 EFCsink 
0352(0160) 32 34 32 34 33 32 32 34 32 34 33 32 45 46 43 47 242432242432EFCG
0368(0170) 72 6F 75 70 20 20 20 20 30 30 37 39 38 34 30 30 roup    00798400
0384(0180) 30 31 31 30 30 30 30 30 33 34 38 36 34 30 50 41 01100000348640PA
0400(0190) 59 4D 45 4E 54 53 53 53 53 53 53 53 53 53 53 53 YMENTSSSSSSSSSSS
0416(01A0) 53 53 53 53 53 53 53 53 53 53 53 53 53 32 30 31 SSSSSSSSSSSSS201
0432(01B0) 38 30 39 32 31 30 37 45 46 43 73 69 6E 6B       8092107EFCsink

So I used postpack from the jpos repos.
https://raw.githubusercontent.com/jpos/jPOS/master/jpos/src/dist/cfg/packager/postpack.xml 

Made few changes based on definitions I saw in the trace.
Change the bitmap of the main field packager to  
 <isofield
      id="1"
      length="16"
      name="BIT MAP"
      class="org.jpos.iso.IFA_BITMAP"/>

Changed the subfield packager for field 127 to the following, note length changed to LLL 999.
 <isofieldpackager
      id="127"  
      length="999"
      name="RESERVED PRIVATE USE"
      class="org.jpos.iso.IFA_LLLBINARY"
      packager="org.jpos.iso.packager.GenericSubFieldPackager">

Changed 127.19 to fixed 31.

   <isofield
          id="19"
          length="31"
          name="BANK DETAILS"
          class="org.jpos.iso.IF_CHAR"/>


Finally ran it with 
package jpos.test;

import org.jpos.iso.ISOException;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.ISOUtil;
import org.jpos.iso.packager.GenericPackager;
import org.jpos.util.Logger;
import org.jpos.util.SimpleLogListener;

public class Main {

    public static void main(String[] args) throws ISOException {

        String str = "30323030463233453434443541384530" + "38313030303030303030303030343030"
                + "30303232313635303537393730303030" + "30303030303533313130303030303030"
                + "30303230303030303037313131353534" + "30363234323433323135353430363037"
                + "31313231303430373131363031313930" + "31303030344430303038303030304430"
                + "30303430303030303631323334353630" + "36313233343536333335303537393730"
                + "3030303030303030353D323130343530" + "31303135393138333438303030303030"
                + "33343836343131303030543030313130" + "303054303031303030303030304E414B"
                + "415345524F20504C4F54203242202020" + "20204B414D5020202020202020202020"
                + "204B4155473830303030343135313031" + "34303032303033303030303030303830"
                + "31353531303130313231313334343130" + "3231333860A030400000000031303030"
                + "303033343836343149535741544D5320" + "2020202045464373696E6B2020202020"
                + "32343234333232343234333245464347" + "726F7570202020203030373938343030"
                + "30313130303030303334383634305041" + "594D454E545353535353535353535353"
                + "53535353535353535353535353323031" + "3830393231303745464373696E6B";
        Logger l = new Logger();
        l.addListener(new SimpleLogListener());
        GenericPackager postPackager = new GenericPackager("C:\\temp\\cfg\\postpack.xml");
        postPackager.setLogger(l, "test");
        ISOMsg m = new ISOMsg();
        m.setPackager(postPackager);
        try {
            m.unpack(ISOUtil.hex2byte(str));
            m.dump(System.out, "");
        }
        catch (ISOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            m.dump(System.out, "X");
        }
        m.setPackager(postPackager);

    }
}

got output
<log realm="test-fld-127" at="2019-07-12T12:31:24.295" lifespan="35ms">
  <unpack>
    60A030400000000031303030303033343836343149535741544D53202020202045464373696E6B202020202032343234333232343234333245464347726F757020202020303037393834303030313130303030303334383634305041594D454E545353535353535353535353535353535353535353535353533230313830393231303745464373696E6B
  </unpack>
</log>
<log realm="test" at="2019-07-12T12:31:24.359" lifespan="101ms">
  <unpack>
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
    <bitmap>{1, 2, 3, 4, 7, 11, 12, 13, 14, 15, 18, 22, 25, 26, 28, 30, 32, 33, 35, 37, 41, 42, 43, 49, 56, 102, 123, 127}</bitmap>
    <unpack fld="2" packager="org.jpos.iso.IFA_LLNUM">
      <value>5057970000000005</value>
    </unpack>
    <unpack fld="3" packager="org.jpos.iso.IFA_NUMERIC">
      <value>311000</value>
    </unpack>
    <unpack fld="4" packager="org.jpos.iso.IFA_NUMERIC">
      <value>000000200000</value>
    </unpack>
    <unpack fld="7" packager="org.jpos.iso.IFA_NUMERIC">
      <value>0711155406</value>
    </unpack>
    <unpack fld="11" packager="org.jpos.iso.IFA_NUMERIC">
      <value>242432</value>
    </unpack>
    <unpack fld="12" packager="org.jpos.iso.IFA_NUMERIC">
      <value>155406</value>
    </unpack>
    <unpack fld="13" packager="org.jpos.iso.IFA_NUMERIC">
      <value>0711</value>
    </unpack>
    <unpack fld="14" packager="org.jpos.iso.IFA_NUMERIC">
      <value>2104</value>
    </unpack>
    <unpack fld="15" packager="org.jpos.iso.IFA_NUMERIC">
      <value>0711</value>
    </unpack>
    <unpack fld="18" packager="org.jpos.iso.IFA_NUMERIC">
      <value>6011</value>
    </unpack>
    <unpack fld="22" packager="org.jpos.iso.IFA_NUMERIC">
      <value>901</value>
    </unpack>
    <unpack fld="25" packager="org.jpos.iso.IFA_NUMERIC">
      <value>00</value>
    </unpack>
    <unpack fld="26" packager="org.jpos.iso.IFA_NUMERIC">
      <value>04</value>
    </unpack>
    <unpack fld="28" packager="org.jpos.iso.IFA_AMOUNT">
      <value>D00080000</value>
    </unpack>
    <unpack fld="30" packager="org.jpos.iso.IFA_AMOUNT">
      <value>D00040000</value>
    </unpack>
    <unpack fld="32" packager="org.jpos.iso.IFA_LLNUM">
      <value>123456</value>
    </unpack>
    <unpack fld="33" packager="org.jpos.iso.IFA_LLNUM">
      <value>123456</value>
    </unpack>
    <unpack fld="35" packager="org.jpos.iso.IFA_LLNUM">
      <value>5057970000000005=2104501015918348</value>
    </unpack>
    <unpack fld="37" packager="org.jpos.iso.IF_CHAR">
      <value>000000348641</value>
    </unpack>
    <unpack fld="41" packager="org.jpos.iso.IF_CHAR">
      <value>1000T001</value>
    </unpack>
    <unpack fld="42" packager="org.jpos.iso.IF_CHAR">
      <value>1000T0010000000</value>
    </unpack>
    <unpack fld="43" packager="org.jpos.iso.IF_CHAR">
      <value>NAKASERO PLOT 2B     KAMP           KAUG</value>
    </unpack>
    <unpack fld="49" packager="org.jpos.iso.IF_CHAR">
      <value>800</value>
    </unpack>
    <unpack fld="56" packager="org.jpos.iso.IFA_LLLCHAR">
      <value>1510</value>
    </unpack>
    <unpack fld="102" packager="org.jpos.iso.IFA_LLCHAR">
      <value>00200300000008</value>
    </unpack>
    <unpack fld="123" packager="org.jpos.iso.IFA_LLLCHAR">
      <value>510101211344102</value>
    </unpack>
    <unpack fld="127" packager="org.jpos.iso.ISOMsgFieldPackager">
    <isomsg direction="none" id="127">
      <!-- org.jpos.iso.packager.GenericSubFieldPackager -->
      <field id="2" value="0000348641"/>
      <field id="3" value="ISWATMS     EFCsink     242432242432EFCGroup    "/>
      <field id="9" value="9840001"/>
      <field id="11" value="0000348640"/>
      <field id="19" value="PAYMENTSSSSSSSSSSSSSSSSSSSSSSSS"/>
      <field id="20" value="20180921"/>
      <field id="26" value="EFCsink"/>
    </isomsg>
    </unpack>
  </unpack>
</log>
<isomsg direction="none">
  <!-- org.jpos.iso.packager.GenericPackager[C:\temp\postpack.xml] -->
  <field id="0" value="0200"/>
  <field id="bitmap" value="{1, 2, 3, 4, 7, 11, 12, 13, 14, 15, 18, 22, 25, 26, 28, 30, 32, 33, 35, 37, 41, 42, 43, 49, 56, 102, 123, 127}" type="bitmap"/>
  <field id="2" value="5057970000000005"/>
  <field id="3" value="311000"/>
  <field id="4" value="000000200000"/>
  <field id="7" value="0711155406"/>
  <field id="11" value="242432"/>
  <field id="12" value="155406"/>
  <field id="13" value="0711"/>
  <field id="14" value="2104"/>
  <field id="15" value="0711"/>
  <field id="18" value="6011"/>
  <field id="22" value="901"/>
  <field id="25" value="00"/>
  <field id="26" value="04"/>
  <field id="28" value="D00080000"/>
  <field id="30" value="D00040000"/>
  <field id="32" value="123456"/>
  <field id="33" value="123456"/>
  <field id="35" value="5057970000000005=2104501015918348"/>
  <field id="37" value="000000348641"/>
  <field id="41" value="1000T001"/>
  <field id="42" value="1000T0010000000"/>
  <field id="43" value="NAKASERO PLOT 2B     KAMP           KAUG"/>
  <field id="49" value="800"/>
  <field id="56" value="1510"/>
  <field id="102" value="00200300000008"/>
  <field id="123" value="510101211344102"/>
  <isomsg id="127">
    <!-- org.jpos.iso.packager.GenericSubFieldPackager -->
    <field id="2" value="0000348641"/>
    <field id="3" value="ISWATMS     EFCsink     242432242432EFCGroup    "/>
    <field id="9" value="9840001"/>
    <field id="11" value="0000348640"/>
    <field id="19" value="PAYMENTSSSSSSSSSSSSSSSSSSSSSSSS"/>
    <field id="20" value="20180921"/>
    <field id="26" value="EFCsink"/>
  </isomsg>
</isomsg>
This means you need to go back to Postilion and ask them why the length preceding 127 is LLL and not the number of L's you have used in your packager.

-chhil


To view this discussion on the web visit https://groups.google.com/d/msgid/jpos-users/CAOv9iq4RK-gXxEEDoJAc_b%2B5kktQdzW-zdQk3KxBxUoB5wTF9A%40mail.gmail.com.

Mutumba Wycliff

unread,
Jul 12, 2019, 6:18:55 AM7/12/19
to jpos-...@googlegroups.com
Hello Chhil,

Indeed am so grateful for the analysis you have provided.
You have really made my day and even taught me a number of concepts I always wanted to know about jpos.

When I checked in the Post-bridge spec for the switch guys and I found this; Which is in agreement with length ..999.

DE-120 – DE 127 RESERVED FOR private USE: Extended transaction data
Format:LLLVAR
Type:ans..999
Description:
These fields are TAG based and carry information needed for extended transactions. For more details refer to ‘Extended Transaction Set Message Element Specification’
Field edits:
The contents of field may change in responses depending on result of transaction.


In your analysis, I did not clearly understand this explanation;


>>To be more specific length + bitmap is  31 33 38 60 A0 30 40 00 00 00 00 [Ascii 138`.0@....]
Which characters are for the Length and which one is for the bitmap. How is the 138 derived?

Otherwise, thank you sooo much.

Warm regards,

To view this discussion on the web visit https://groups.google.com/d/msgid/jpos-users/CAPazefAeqbqykWYbU%3D_DjsabD2Qypmu08W%3D2s8mvdj5n8sJE_A%40mail.gmail.com.

For more options, visit https://groups.google.com/d/optout.

chhil

unread,
Jul 12, 2019, 6:45:14 AM7/12/19
to jpos-...@googlegroups.com
Reading hexdumps 

The left side has hex data 2 digits (2 nibbles or 8 bits) are required to represent  the charset being used, the right side has ASCII equivalent. When characters are unprintable a "."  is put as an indicator.  Non printable data is usually parsed using a binary packager to extract information. 

0x31 is 1
0x33 is 3 
0x38 is 8

That's the LLL part , it's 138. 

The next 8 bytes are the bitmap. 


The concepts are more to do with the structure of ISO8583 messages, not related to jpos. The programmers guide has an example for dissecting an 8583 message , do read it. 
It's always a good exercise to parse a message by hand to understand what it is and then use libraries that do it for you. 

-chhil


<div title="MDH:PGRpdiBjbGFzcz0iZ21haWxfZGVmYXVsdCIgc3R5bGU9ImZvbnQtZmFtaWx5OmNvdXJpZXIgbmV3 LG1vbm9zcGFjZSI+PGJyPjwvZGl2PjxkaXYgY2xhc3M9ImdtYWlsX2RlZmF1bHQiIHN0eWxlPSJm b250LWZhbWlseTpjb3VyaWVyIG5ldyxtb25vc3BhY2UiPmBgYHhtbDwvZGl2PjxkaXYgY2xhc3M9 ImdtYWlsX2RlZmF1bHQiIHN0eWxlPSJmb250LWZhbWlseTpjb3VyaWVyIG5ldyxtb25vc3BhY2Ui PiZsdDtsb2cgcmVhbG09InRlc3QtZmxkLTEyNyIgYXQ9IjIwMTktMDctMTJUMTI6MzE6MjQuMjk1 IiBsaWZlc3Bhbj0iMzVtcyImZ3Q7PGJyPiZuYnNwOyAmbHQ7dW5wYWNrJmd0Ozxicj4mbmJzcDsg Jm5ic3A7IDYwQTAzMDQwMDAwMDAwMDAzMTMwMzAzMDMwMzAzMzM0MzgzNjM0MzE0OTUzNTc0MTU0 NEQ1MzIwMjAyMDIwMjA0NTQ2NDM3MzY5NkU2QjIwMjAyMDIwMjAzMjM0MzIzNDMzMzIzMjM0MzIz NDMzMzI0NTQ2NDM0NzcyNkY3NTcwMjAyMDIwMjAzMDMwMzczOTM4MzQzMDMwMzAzMTMxMzAzMDMw MzAzMDMzMzQzODM2MzQzMDUwNDE1OTRENDU0RTU0NTM1MzUzNTM1MzUzNTM1MzUzNTM1MzUzNTM1 MzUzNTM1MzUzNTM1MzUzNTM1MzUzMzIzMDMxMzgzMDM5MzIzMTMwMzc0NTQ2NDM3MzY5NkU2Qjxi cj4mbmJzcDsgJmx0Oy91bnBhY2smZ3Q7PGJyPiZsdDsvbG9nJmd0Ozxicj4mbHQ7bG9nIHJlYWxt 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ICZuYnNwOyAmbmJzcDsgJmx0O3ZhbHVlJmd0OzEwMDBUMDAxJmx0Oy92YWx1ZSZndDs8YnI+Jm5i c3A7ICZuYnNwOyAmbHQ7L3VucGFjayZndDs8YnI+Jm5ic3A7ICZuYnNwOyAmbHQ7dW5wYWNrIGZs ZD0iNDIiIHBhY2thZ2VyPSJvcmcuanBvcy5pc28uSUZfQ0hBUiImZ3

Mutumba Wycliff

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Jul 16, 2019, 2:21:01 AM7/16/19
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Dear Chhil,

Thanks once again for the guidance on reading hexdumps,
indeed I have understood how the 138 came about.

I tried this link but it did not return any results See https://images.app.goo.gl/jDgkiJQZHJqXXLrn6

Let me look for the programmers guide so I can further look at that example for dissecting an 8583 message.

thanks



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chhil

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Jul 16, 2019, 5:10:43 AM7/16/19
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You can try this for the link that does not work.

https://www.asciitable.com/ 

-chhil 

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Mutumba Wycliff

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Jul 16, 2019, 10:32:12 AM7/16/19
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Thanks Chhil.

To view this discussion on the web visit https://groups.google.com/d/msgid/jpos-users/CAPazefAj0W0CStnERcUJ4noXQqNV-QeLN5w%2B3Kyofja7i6KP%3DQ%40mail.gmail.com.

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