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AIXLink/X.25 1.1 for AIX: Guide and Reference

N_DATACK_REQ Primitive


Acknowledges the receipt of data which had the N_DATA_ACK flag set.


This primitive consists of one M_PROTO message block with the following structure:

typedef struct {
   ulong PRIM_type;
} N_datack_req_t;


The N_DATACK_REQ primitive acknowledges receipt of an N_DATA_IND primitive which had the receipt confirmation parameter set. The NPI application should send a N_DATACK_REQ on receipt of such data.


PRIM_type Specifies the N_DATACK_REQ primitive.


This primitive does not require any acknowledgments. However, the primitive may generate a fatal error. The STREAMS M_ERROR message type notifies the NS user of an EPROTO error. As a result of the error, all system calls on that stream will fail.

Error Codes

NSYERR Indicates a system error. The error is indicated in the N_ERROR_ACK primitive.

Implementation Specifics

The N_DATACK_REQ primitive is part of X.25 Licensed Program.

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