DAT_PSP_CREATE_ANY(3DAT) Direct Access Transport Library Functions


NAME


dat_psp_create_any - create a persistent Public Service Point

SYNOPSIS


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

DAT_RETURN
dat_psp_create_any(
IN DAT_IA_HANDLE ia_handle,
IN DAT_CONN_QUAL conn_qual,
IN DAT_EVD_HANDLE evd_handle,
IN DAT_PSP_FLAGS psp_flags,
OUT DAT_PSP_HANDLE *psp_handle
)


PARAMETERS


ia_handle
Handle for an instance of DAT IA.


conn_qual
Connection Qualifier of the IA on which the Public Service
Point is listening.


evd_handle
Event Dispatcher that provides the Connection Requested
Events to the Consumer. The size of the event queue for
the Event Dispatcher controls the size of the backlog for
the created Public Service Point.


psp_flags
Flag that indicates whether the Provider or Consumer
creates an Endpoint per arrived Connection Request. The
value of DAT_PSP_PROVIDER indicates that the Consumer wants
to get an Endpoint from the Provider; a value of
DAT_PSP_CONSUMER means the Consumer does not want the
Provider to provide an Endpoint for each arrived Connection
Request.


psp_handle
Handle to an opaque Public Service Point.


DESCRIPTION


The dat_psp_create_any() function creates a persistent Public Service
Point that can receive multiple requests for connection and generate
multiple Connection Request instances that are delivered through the
specified Event Dispatcher in Notification events.


The dat_psp_create_any() function allocates an unused Connection
Qualifier, creates a Public Service point for it, and returns both the
allocated Connection Qualifier and the created Public Service Point to
the Consumer.


The allocated Connection Qualifier should be chosen from "nonprivileged"
ports that are not currently used or reserved by any user or kernel
Consumer or host ULP of the IA. The format of allocated Connection
Qualifier returned is specific to IA transport type.


The dat_psp_create_any() function is blocking. When the Public Service
Point is created, DAT_SUCCESS is returned, psp_handle contains a handle
to an opaque Public Service Point Object, and conn_qual contains the
allocated Connection Qualifier. When return is not DAT_SUCCESS,
psp_handle and conn_qual return values are undefined.


There is no explicit backlog for a Public Service Point. Instead,
Consumers can control the size of backlog through the queue size of the
associated Event Dispatcher.


The psp_flags parameter allows Consumers to request that the Provider
create an implicit Endpoint for each incoming Connection Request, or
request that the Provider should not create one per Connection Request.
If the Provider cannot satisfy the request, the operation shall fail and
DAT_MODEL_NOT_SUPPORTED is returned.


All Endpoints created by the Provider have DAT_HANDLE_NULL for the
Protection Zone and all Event Dispatchers. The Provider sets up Endpoint
attributes to match the Active side connection request. The Consumer can
change Endpoint parameters. Consumers should change Endpoint parameters,
especially PZ and EVD, and are advised to change parameters for local
accesses prior to the connection request acceptance with the Endpoint.

RETURN VALUES


DAT_SUCCESS
The operation was successful.


DAT_INSUFFICIENT_RESOURCES
The operation failed due to resource
limitations.


DAT_INVALID_HANDLE
The ia_handle or evd_handle parameter is
invalid.


DAT_INVALID_PARAMETER
The conn_qual or psp_flags parameter is
invalid.


DAT_CONN_QUAL_UNAVAILABLE
No Connection Qualifiers available.


DAT_MODEL_NOT_SUPPORTED
The requested Model was not supported by
the Provider.


ATTRIBUTES


See attributes(5) 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(5)


July 16, 2004 DAT_PSP_CREATE_ANY(3DAT)