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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
SESBK
Control Block Contents
SESBK DSECT
Cross Reference (Contains links to field and bit definitions)
SESBK Prolog
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 Control Block Content
SESBK DSECT
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 Storage Layout
*** 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
SESBK Cross Reference
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
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