NAME       : HCPSESBK
 DESCRIPTION: MPC User Session Block
 DSECT      : SESBK
 FUNCTION   : Defines a structure that represents a single
              Multipath Channel (MPC) User session that has been
              established on an existing MPC group.  Each session
              represents a data connection between the adapter
              and the ULP (Upper Layer Protocol, ie. TCP/IP).
 LOCATED BY : MPCSESFP (HCPMPCBK) Mutipath Channel Block
              (MPC group).
 CREATED BY : This block is created by HCPMPX when a CM_ENABLE is
              processed for a USER connection.
 DELETED BY : HCPMPXRS - during RESET, CSCH and HSCH processing or
              a CM_DELETE primitive from session owner.
 REFERENCES : Include here the other major blocks
 SERIALIZED : MPCBK Exclusive lock
 RELOCATION CONSIDERATIONS : None
 COMPATIBILITY AND MIGRATION CONCERNS : None.

 SESBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SESBK          MPC User Session Block
0000    0 Address      4 SESDATDV       Pointer DATA device array entry
0004    4 Bitstring    1 SESSTATE       User Session State
          00000000       SESSTART       X'00' SESSTART Initial/Startup
          00000001       SESRESET       X'01' SESRESET Reset
          00000004       SESUSCON       X'04' SESUSCON USER_CONNECT
                                        complete
          00000008       SESDMACT       X'08' SESDMACT DM_ACT complete
                                        (MPC init now complete)
          0000000C       SESSRLAN       X'0C' SESSRLAN STRTLAN complete
0005    5 Bitstring    1 SESTRANP       Transport type
          00000001       SESIP          1 SESIP Layer 3 IP datagrams
          00000002       SESETHER       2 SESETHER Layer 2 Ethernet
                                        frames
0006    6 Bitstring    2 SESRESV        Reserved
0008    8 Bitstring    4 SESASST        Armed IPv4 Assists for session
          .... ...1      SESASST_ARP    X'00000001' SESASST_ARP = ARP
                                        Offload
          .... ..1.      SESASST_IN_CHECKSUM
                                        X'00000002' SESASST_IN_CHECKSUM =
                                        Inbound Chec
          .... .1..      SESASST_OUT_CHECKSUM
                                        X'00000004' SESASST_OUT_CHECKSUM
                                        = Outbound Ch
          .... 1...      SESASST_IP_FRAG
                                        X'00000008' SESASST_IP_FRAG = IP
                                        Fragmentation
          ...1 ....      SESASST_BROADCAST
                                        X'00000010' SESASST_BROADCAST =
                                        Broadcast Filt
          ..1. ....      SESASST_IPV6   X'00000020' SESASST_IPV6 = IPv6
                                        Processing
          .1.. ....      SESASST_MULTICAST
                                        X'00000040' SESASST_MULTICAST =
                                        Multicast Proc
          1... ....      SESASST_IP_REASM
                                        X'00000080' SESASST_IP_REASM = IP
                                        Reassembly
          0SESASST       SESASST_ARPCACHE
                                        X'00000100' SESASST_ARPCACHE =
                                        Query ARP Cache
          0SESASST       SESASST_ARPCOUNT
                                        X'00000200' SESASST_ARPCOUNT =
                                        Query ARP Count
          0SESASST       SESASST_ADAPTERPARMS
                                        X'00000400' SESASST_ADAPTERPARMS
                                        = SETADAPTERP
          0SESASST       SESASST_NULLTAG
                                        X'00000800' SESASST_NULLTAG =
                                        VLAN (NULL tag)
          0SESASST       SESASST_PASS   X'00001000' SESASST_PASS =
                                        Passthru (Encapsula
          0SESASST       SESASST_VLAN   X'00004000' SESASST_VLAN = VLAN
                                        (full support)
          0SESASST       SESASST_QUERYARPASST
                                        X'00040000' SESASST_QUERYARPASST
                                        = Query Arp A
000C   12 Bitstring    4 SESASST6       Armed IPv6 Assists for session
0010   16 Bitstring    4 SESL2AST       Armed Layer 2 Assists for session
0014   20 Bitstring    4 SESFRAME       Armed Broadcast Frames for sess.
      The SESCONTK identifies who is the owner of this USER
      session connection. The SESUSTOK is the unique session token
      that identifies this data connection.
                                  (Originator Call ID on User Setup)
0018   24 Bitstring   12 SESCONTK       USER Connection Token + token len
0024   36 Bitstring   12 SESUSTOK       Session Identification + token
                                        len
          00000006       SESSIZE        (*-SESBK+7)/8 size in doublewords
          00000030       SESBSIZE       SESSIZE*8 size in bytes

          
*** SESBK - MPC User Session Block
*
*     +---------------------------+------+------+-------------+
*   0 |         SESDATDV          |:STATE|:TRANP|  SESRESV    |
*     +---------------------------+------+------+-------------+
*   8 |         SESASST           |         SESASST6          |
*     +---------------------------+---------------------------+
*  10 |         SESL2AST          |         SESFRAME          |
*     +---------------------------+---------------------------+
*  18 |                       SESCONTK                        |
*     |                           +---------------------------+
*  20 |                           |         SESUSTOK          |
*     +---------------------------+                           |
*     |                                                       |
*     +-------------------------------------------------------+
*  30
*
*** SESBK - MPC User Session Block

 
Symbol         Dspl Value
-------------- ---- -----
SESASST        0008
SESASST_ADAPTERPARMS
               0008 0SESASST
SESASST_ARP    0008 01
SESASST_ARPCACHE
               0008 0SESASST
SESASST_ARPCOUNT
               0008 0SESASST
SESASST_BROADCAST
               0008 10
SESASST_IN_CHECKSUM
               0008 02
SESASST_IP_FRAG
               0008 08
SESASST_IP_REASM
               0008 80
SESASST_IPV6   0008 20
SESASST_MULTICAST
               0008 40
SESASST_NULLTAG
               0008 0SESASST
SESASST_OUT_CHECKSUM
               0008 04
SESASST_PASS   0008 0SESASST
SESASST_QUERYARPASST
               0008 0SESASST
SESASST_VLAN   0008 0SESASST
SESASST6       000C
SESBSIZE       0024 00000030
SESCONTK       0018
SESDATDV       0000
SESDMACT       0004 00000008
SESETHER       0005 00000002
SESFRAME       0014
SESIP          0005 00000001
SESL2AST       0010
SESRESET       0004 00000001
SESRESV        0006
SESSIZE        0024 00000006
SESSRLAN       0004 0000000C
SESSTART       0004 00000000
SESSTATE       0004
SESTRANP       0005
SESUSCON       0004 00000004
SESUSTOK       0024