DAT_RSP_CREATE(3DAT) Direct Access Transport Library Functions

NAME

dat_rsp_create - create a Reserved Service Point

SYNOPSIS

cc [ flag... ] file... -ldat [ library... ]
#include <dat/udat.h>

DAT_RETURN
dat_rsp_create (
IN DAT_IA_HANDLE ia_handle,
IN DAT_CONN_QUAL conn_qual,
IN DAT_EP_HANDLE ep_handle,
IN DAT_EVD_HANDLE evd_handle,
OUT DAT_RSP_HANDLE *rsp_handle
)

PARAMETERS

ia_handle
Handle for an instance of DAT IA.


conn_qual
Connection Qualifier of the IA the Reserved Service
Point listens to.


ep_handle
Handle for the Endpoint associated with the Reserved
Service Point that is the only Endpoint that can accept
a Connection Request on this Service Point. The value
DAT_HANDLE_NULL requests the Provider to associate a
Provider-created Endpoint with this Service Point.


evd_handle
The Event Dispatcher to which an event of Connection
Request arrival is generated.


rsp_handle
Handle to an opaque Reserved Service Point.

DESCRIPTION

The dat_rsp_create() function creates a Reserved Service Point with
the specified Endpoint that generates, at most, one Connection
Request that is delivered to the specified Event Dispatcher in a
Notification event.

RETURN VALUES

DAT_SUCCESS
The operation was successful.


DAT_INSUFFICIENT_RESOURCES
The operation failed due to resource
limitations.


DAT_INVALID_HANDLE
The ia_handle, evd_handle, or ep_handle
parameter is invalid.


DAT_INVALID_PARAMETER
The conn_qual parameter is invalid.


DAT_INVALID_STATE
Parameter in an invalid state. For
example, an Endpoint was not in the
Idle state.


DAT_CONN_QUAL_IN_USE
Specified Connection Qualifier is in
use.

USAGE

The usage of a Reserve Service Point is as follows:

o The DAT Consumer creates a Local Endpoint and configures
it appropriately.

o The DAT Consumer creates a Reserved Service Point
specifying the Local Endpoint.

o The Reserved Service Point performs the following:

o Collects native transport information reflecting a
received Connection Request.

o Creates a Pending Connection Request.

o Creates a Connection Request Notice (event) that
includes the Pending Connection Request (which
includes, among others, Reserved Service Point
Connection Qualifier, its Local Endpoint, and
information about remote Endpoint).

o Delivers the Connection Request Notice to the
Consumer-specified target (CNO) evd_handle. The Local
Endpoint is transitioned from Reserved to Passive
Connection Pending state.

o Upon receiving a connection request, or at some time
subsequent to that, the DAT Consumer must either accept()
or reject() the Pending Connection Request.

o If accepted, the original Local Endpoint is now in a
Connected state and fully usable for this connection,
pending only native transport mandated RTU messages. This
includes binding it to the IA port if that was not done
previously. The Consumer is notified that the Endpoint is
in a Connected state by a Connection Established Event on
the Endpoint connect_evd_handle.

o If rejected, the Local Endpoint point transitions into
Unconnected state. The DAT Consumer can elect to destroy
it or reuse it for other purposes.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+---------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+---------------------------+
|Interface Stability | Standard: uDAPL, 1.1, 1.2 |
+--------------------+---------------------------+
|MT-Level | Safe |
+--------------------+---------------------------+

SEE ALSO

libdat(3LIB), attributes(7)

July 16, 2004 DAT_RSP_CREATE(3DAT)