Sends a datagram to the destination specified in the calledPty parameter of the SCCPUDataRqst message.
DWORD SCCPUDataRqst ( CTAHD ctahd, S16 spId, SccpUdataRqst *dataRqst)
|
Argument |
Description |
|
ctahd |
Natural Access handle returned by ctaCreateContext. |
|
spId |
SCCP service access point. |
|
dataRqst |
Pointer to the caller's data request message structure containing all parameters and user data to be included in the message to the far end point. |
|
Return value |
Description |
|
SCCP_SUCCESS |
|
|
SCCPERR_OVERRUN |
Message generated by this request exceeds the maximum allowed size. |
|
SCCPERR_RESOURCES |
Number of available buffers is exhausted. |
|
CTAERR_BAD_ARGUMENT |
One or more arguments are invalid. |
|
CTAERR_DRIVER_SEND_FAILED |
Error occurred accessing the CPI driver. Call SCCPGetStats to obtain the error code. The error code is in the failTxErr field of the SccpStats structure. The CPI error codes are listed in the txcpi.h include file. |
|
CTAERR_INVALID_CTAHD |
Natural Access handle is invalid. |
Based on the service class requested and the size of the data field, the SCCP layer generates either unitdata (UDT) or extended unitdata (XUDT) packet(s).
The maximum length of the data field included in the SccpUdataRqst structure is MAX_DATA_SZ bytes.
Refer to Transferring connectionless data for more information.