man pages section 3: Extended Library Functions

dat_cr_query(3DAT)

Name

dat_cr_query– provide parameters of the Connection Request

Synopsis

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

DAT_RETURN
    dat_cr_query (
    IN    DAT_CR_HANDLE        cr_handle,
    IN    DAT_CR_PARAM_MASK    cr_param_mask,
    OUT   DAT_CR_PARAM         *cr_param
    )

Parameters

cr_handle: Handle for an instance of a Connection Request.
cr_param_mask: Mask for Connection Request parameters.
cr_param: Pointer to a Consumer-allocated structure that the Provider fills for Consumer-requested parameters.

Description

The dat_cr_query() function provides to the Consumer parameters of the Connection Request. The Consumer passes in a pointer to the Consumer-allocated structures for Connection Request parameters that the Provider fills.

The cr_param_mask parameter allows Consumers to specify which parameters to query. The Provider returns values for cr_param_mask requested parameters. The Provider can return values for any other parameters.

Return Values

DAT_SUCCESS: The operation was successful
DAT_INVALID_HANDLE: The cr_handle handle is invalid.
DAT_INVALID_PARAMETER: The cr_param_mask parameter is invalid.

Usage

The Consumer uses dat_cr_query() to get information about requesting a remote Endpoint as well as a local Endpoint if it was allocated by the Provider for the arrived Connection Request. The local Endpoint is created if the Consumer used PSP with DAT_PSP_PROVIDER as the value for psp_flags. For the remote Endpoint, dat_cr_query() provides remote_ia_address and remote_port_qual. It also provides remote peer private_data and its size.

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