ISDN_DATA_B3.ISDN_RESP(D7isdn)

ISDN_DATA_B3.ISDN_RESP -- ISDN incoming data response

Synopsis

   #include <sys/stream.h>
   #include <sys/mdi.h>
   #include <sys/types.h>
   #include <sys/scoisdn.h>
   
   typedef struct isdn_data_b3_resp
   {
       isdnNCCI_t      ncci;
       isdnWord_t      dataHandle;
   } isdn_data_b3_resp_t;

Description

The ISDN_DATA_B3.ISDN_RESP message consists of one M_PROTO(D7str) message block confirming the acceptance of an incoming data package. The logical connection is identified by the ncci (Network Control Connection Identifier) parameter. The dataHandle parameter identifies the data handle used by the ISDN driver in the corresponding ISDN_DATA_B3.ISDN_IND(D7isdn) message as the reference to the transferred data area.

Some driver implementations may hold resources associated with the data buffer until the ISDN_DATA_B3.ISDN_RESP(D7isdn) is received. Applications should therefore respond with ISDN_DATA_B3.ISDN_INDs to this message as quickly as possible.

Data throughput depends on an application's rapid response to ISDN_DATA_B3.ISDN_IND(D7isdn) messages. Failure to do so will trigger flow control on the line for protocols supporting flow control, such as ISO 7776 (X.75) or ISO 8028 (X.25). This may also cause loss of incoming data for protocols without flow control mechanisms.

Parameters

ncci: Network Control Connection Identifier; see isdnNCCI(D4isdn).
dataHandle: Data handle; see isdnData(D4isdn).

References

Intro(D4isdn), Intro(D7isdn)

ISDN_DATA_B3.ISDN_CONF(D7isdn), ISDN_DATA_B3.ISDN_REQ(D7isdn), ISDN_DATA_B3.ISDN_IND(D7isdn)

``SCO ISDN adapter drivers'' in Developing MDI network adapter drivers