cc_GetDNIS( )

Description | Cautions | Example | Errors | See Also

Name:	int cc_GetDNIS(crn, dnis_buf)
Inputs:	CRN crn	call reference number
	char *dnis_buf	pointer to DNIS buffer
Returns:	0 on success < 0 on failure
Includes:	cclib.h
Category:	Optional call handling
Mode:	synchronous
Technology:	BRI/2; BRI/SC; PRI (all protocols)

Description

The cc_GetDNIS( ) function gets the dialed number information string (destination address/called party number) associated with a specific call reference number (CRN). The information is in a NULL terminated ASCII string.

Parameter	Description
crn:	The call reference number. Each call needs a CRN.
dnis_buf:	The address of the buffer where the DNIS (destination address/called party number) will be stored. Use CC_ADDRSIZE to define the size of the buffer.

Cautions

Make sure the size of the dnis_buf is large enough to hold the DNIS. It must be no smaller than CC_ADDRSIZE. Refer to the file cclib.h for the maximum allowable string.

Example

#include <windows.h>   /* For Windows applications only */  
#include <stdio.h>  
#include <errno.h>  
#include "srllib.h"  
#include "dtilib.h"  
#include "cclib.h"  
void main()  
{  
   LINEDEV   devhdl    = 0;  
   CRN       crn = 0;  
   char     *devname = "dtiB1T1";  
   char      dnis_buf[CC_ADDRSIZE];  
   if ( cc_Open( &devhdl, devname, 0 ) < 0 )   
   {  
        printf("Error opening device: errno = %d\n", errno);  
        exit(1);  
   }  
   printf("Waiting for call\n");  
   if ( cc_WaitCall(devhdl, &crn, NULL, -1, EV_SYNC) < 0 )  
        procdevfail(devhdl);  
   printf("Getting DNIS\n");  
   if ( cc_GetDNIS(crn,dnis_buf) < 0 )  
        callfail(crn);  
   else  
        printf("cc_GetDNIS succeeded: %s\n",dnis_buf);  
   if ( cc_AnswerCall(crn, 0, EV_SYNC) < 0 )  
        callfail(crn);  
        .  
        .  
        .  
        .  
        .  
   /* Drop the call */  
   if ( cc_DropCall(crn, NORMAL_CLEARING, EV_SYNC) < 0 )  
        callfail(crn);  
   if ( cc_ReleaseCall(crn) < 0 )  
        callfail(crn);  
   if ( cc_Close( devhdl ) < 0 )   
      printf("Error closing device, errno = %d\n", errno);  
}  
int callfail(CRN crn)  
{                 
        LINEDEV ld;  
        cc_CRN2LineDev(crn,&ld);  
        procdevfail(ld);  
}  
int procdevfail(LINEDEV handle)  
{  
        int reason;  
        char *msg;  
        reason = cc_CauseValue(handle);  
        cc_ResultMsg(handle,reason,&msg);  
        printf("reason = %x - %s\n",reason,msg);  
}

Errors

If the function returns < 0 to indicate failure, use the cc_CauseValue( ) function to retrieve the reason code for the failure. The cc_ResultMsg( ) function can be used to interpret the reason code. Error codes are defined in the files ccerr.h, isdnerr.h, and isdncmd.h.

Error codes from the cc_GetDNIS( ) function include the following:

Error Code	Description
ERR_ISDN_LIB | E_ISBADCRN	Bad call reference number
ERR_ISDN_LIB | E_ISBADPAR	Bad input parameter
ERR_ISDN_LIB | E_ISNOINFOBUF	Information buffer not ready

See Also

• cc_WaitCall( )
• cc_MakeCall( )

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