The Receive Request CPRB (Entry to Server)

Table 1. CPRB Control Block on Entry to Server
Offset Dec(Hex)	Number of Bytes	Field Name	Contents
0(0)	1	CRBF1	The control block's version number (first four bits) and modification level number (last four bits).
1(1)	2		Reserved
3(3)	1	CRBF4	The type of request. X'01' indicates a service request. (X'03' indicates a define server (DEFSERV) request.)
4(4)	4	CRBCPRB	Control block identifier (character string ‘CPRB’).
8(8)	8		Reserved
16(10)	8	CRBSNAME	The name of the requested server.
24(18)	2		Reserved
26(1A)	2	CRBFID¹	The ID of the requested service function (1-99)
28(1C)	12		Reserved
40(28)	4	CRBRQDLN¹	The length of the request data.
44(2C)	4	CRBRQDAT¹	The address of the request data.
48(30)	4	CRBRPDLN²	The length of the reply data (maximum length allowed by the requester).
52(34)	4	CRBRPDAT³	The address of the buffer for reply data.
56(38)	4	CRBRQPLN¹	The length of the request parameters.
60(3C)	4	CRBRQPRM¹	The address of the request parameters.
64(40)	4	CRBRPPLN²	The length of the reply parameters (maximum length allowed by the requester).
68(44)	4	CRBRPPRM³	The address of the buffer for reply parameters.
72(48)	40		Reserved

Notes:

1: Request field. Use but do not alter.
2: Request/Reply field. The requester initializes these fields. The server may modify the contents of these fields.
3: Address of Reply field. Use but do not alter. The server may return information in a buffer located at this address. Do not return more information than will fit in the buffer (as indicated in the associated length field).
Do not modify any fields other than those marked with a 2 .