Interpreting an FMH-5 Attach for Independent LU 6.2

ID: Q169575

The information in this article applies to:

Microsoft SNA Server, versions 2.0, 2.1, 2.11, 3.0

SUMMARY

An FMH-5 Attach is used to carry a request for conversation to be established between two transaction programs. The following is an example Attach message in a PVI (Peer Verb Interface) trace. This is the first SNA message that flows to the remote system for conversation startup:


   PVI    ---------------------------------------------- 12:05:05.65
   PVI    751F0001->0302E453 LU 6.2   
   PVI                       MSGID:SWAT   MSGTYP:PRFLS  Sense1:0004
   PVI                       Sense2:0000 
   PVI    
   PVI    ---- Header  at address 8297B0F8, 1 elements ----
   PVI    0B050004 00000800 E1000000 0100C500     <..............E.>
   PVI    
   PVI    ---- Element at address 829935BC, start 13, end 237 ----
   PVI    430502FF 1803D000 400430F0 F0F50F04     <C.......@.0005..>
   PVI    02C1D4C9 09017B30 09E53983 81E71A11     <.AMI..{0.V9caX..>
   PVI    C2C9D6D5 C5E3C6D9 4BE2D5C1 C4E5F0F2     <BIONETFRKSNADV02>
   PVI    F124280E 0D1E0500 01000800 00000000     <1$(.............>
   PVI    0002FF00 9E12F500 9A12E200 9612A020     <......5...S.o.. >
   PVI    00051001 00000023 D7C3F2F3 F9F9E2F1     <.......#PC2399S1>
   PVI    4040F3F1 F7F9F0F0 F0F24040 40404080     <@@31790002@@@@@.>
   PVI    00000000 00000000 00000026 C4C6C1C2     <...........&DFAB>
   PVI    40F6F9F7 40F2F9F7 40404040 40404040     <@697@297@@@@@@@@>
   PVI    40404040 40404040 4040C140 00000000     <@@@@@@@@@@A@....>
   PVI    00000000 00000000 00000000 00000000     <................>
   PVI    00000000 00000000 00000000 00000000     <................>
   PVI    00000000 00000000 00000000 00000000     <................>
   PVI    00000000 00000000 00000000 00000000     <................>
         PVI    00                                      <.               >

The following is the above FMH-5 Attach broken out using the IBM SNA Format Guide:


   43 - Length

   05 - FMH type

   02FF - Command code: ATTACH

   18 - Security indicators:  Password substitute present, PIP data present

   03 - Length of fixed length parameters (always 3)

   D00040 - Half duplex basic conversation, confirm sync level

   Transaction Program Name field:
      04 - Length
      30F0F0F5 - TP Name
   
   Access Security Information field:
   0F - Length
      0402C1D4C9 - User ID field "AMI"
      09017B3009E5398381E7 - Password field

   Logical-Unit-of-Work Identifier Field:
   1A11 C2C9D6D5 C5E3C6D9 4BE2D5C1 C4E5F0F2
   F124  280E0D1E  050001

Conversation Correlator Field:
   00 - length field
   0800 00000000 0002FF - Attach sequence number

Pip Data (Pip data format can be found in IBM's "AS/400 5250 Display Station Pass-Through: Interface Specification" document. There is no order number for this manual. Byte 18 determines whether Pip Data is present.):


   009E12F5 - GDS header for PIP data
   009A12E2 - GDS Header for PIP subfield
   009612A0  - GDS Header for pass-through data
      2000 - Pass through operation flags (start-up record - no diagnostics included)
   Start-up record:
   0510 - Reported System ID  - ??? (AS/400 is 0560)
   0100 - Reported Release Level
      0000 - Fixed portion flags field
      Source Device information:
         23 length field
         D7C3F2F3 F9F9E2F1 4040  <Reserved>#PC2399S1
         F3F1 F7F9 Source device type "3179"
         F0F0 F0F2 Source device model "0002"
         4040 4040 Keyboard type
         408000000000 00000000 0000 Reserved
      Dynamic configuration data:
         0026 C4
         C6C1C240 Subfield flags  
         F6F9F7 Keyboard ID
         40F2F9F740 Reserved
         40404040  Char set / code page
         4040404040404040 WSC type /model
         4040404040C14000 Actual device type / model

Additional query words:

Keywords : prodsna snaappc snacpic snabase
Version : WINDOWS:2.0,2.1,2.11,3.0
Platform : WINDOWS
Issue type :