73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
#include <assert.h>
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#include <sys/time.h>
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#include <linux/capi.h>
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#include <capi20.h>
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#include "id.h"
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#include "init.h"
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#include "data.h"
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MainDataAvailable_t MainDataAvailable_p = 0L;
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MainDataConf_t MainDataConf_p = 0L;
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/*
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* SendData: Sends one block with data over the specified channel
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*/
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unsigned SendData(ConnectionID Connection, void *Data, unsigned short DataLength, unsigned short DataHandle) {
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_cmsg CMSG;
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assert (Connection != INVALID_CONNECTION_ID);
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assert (GetState(Connection) == Connected);
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DATA_B3_REQ_HEADER(&CMSG, Appl_Id, 0, GetConnectionNCCI(Connection));
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DATA_B3_REQ_DATA(&CMSG) = (unsigned long)Data;
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DATA_B3_REQ_DATALENGTH(&CMSG) = DataLength;
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DATA_B3_REQ_DATAHANDLE(&CMSG) = DataHandle;
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return CAPI_PUT_CMSG(&CMSG);
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}
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/*
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* DataConf: signals the successful sending of a datablock
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* This function is called after receiving a DATA_B3_CONFirmation. CAPI signals
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* that the datablock identified by DataHandle has been sent and the memory
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* area may be freed. The DataHandle is the same as specified in SendBlock.
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* This function is implemented in the main program.
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*/
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void DataConf(ConnectionID Connection, unsigned short DataHandle, unsigned short Info) {
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if (MainDataConf_p)
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MainDataConf_p(Connection, DataHandle, Info);
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}
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/*
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* DataAvailable: signals received data blocks
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* This function is called after a DATA_B3_INDication is received. The flag
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* DiscardData tells CAPI to free the memora area directly after the return
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* of this function when set to TRUE (1) which is the preset. When the flag
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* is set to FALSE (0) the data area MUST be freed later with ReleaseData.
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* The datahandle identifies the memory area. When reaching 7 unconfirmed
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* blocks, no more incoming data will be signaled until freeing at least
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* one block.
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* This function is implemented in the main program.
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*/
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void DataAvailable(ConnectionID Connection, void *Data, unsigned short DataLength,
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unsigned short DataHandle, int *DiscardData) {
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if (MainDataAvailable_p)
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MainDataAvailable_p(Connection, Data, DataLength, DataHandle,
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DiscardData);
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else
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*DiscardData = TRUE;
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}
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/*
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* ReleaseData: allows CAPI to reuse the memory area of the specified block.
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* CAPI allows max. 7 unconfirmed Blocks. If the maximum of 7 is reached,
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* no more DATA_B3_INDications will come up.
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*/
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unsigned ReleaseData(ConnectionID Connection, unsigned short DataHandle) {
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_cmsg CMSG;
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assert (Connection != INVALID_CONNECTION_ID);
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assert (GetState(Connection) == Connected);
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return DATA_B3_RESP(&CMSG, Appl_Id, 0, GetConnectionNCCI(Connection), DataHandle);
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}
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