[Bluez-devel] Erasure of records of previously discovered devices

[Bluez-devel] Erasure of records of previously discovered devices

[Khoo Teck Ping]

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Dear all

I wrote a small c program to continuously inquire for nearby bluetooth devices and record their address, name and time of discovery. However, the program always seems to return a list of devices found earlier, even when the discovered device has been switched off. 

Following is part of the code, which does 5 rounds of inquiry, largely derived from Bastian Ballmann's hciscan program. Is there anyway I can erase records of previously found devices and do a fresh inquiry everytime? 

Thanks. 
Teck Ping



for(j = 1; j <= 5; j++)
  {
     for(i = 0; i < num_rsp; i++) 
     {
        memset(name, 0, sizeof(name));

        if(hci_read_remote_name(dd, &(info+i)->bdaddr, sizeof(name), name, 100000) < 0)
        {
           strcpy(name, "na");
        }   

        baswap(&bdaddr, &(info+i)->bdaddr);
        time_t now;
        time(&now);

        printf("%d\t%s\t%s\t%s", j, batostr(&bdaddr), name, ctime(&now));
        
        /*a+ will append text to the end of file*/
        ptr = fopen("data.txt", "a+");
           fprintf(ptr,"%d;%s;%s;%s", j, batostr(&bdaddr), name, ctime(&now));      
        fclose(ptr); /*close the opened file*/
     }
  }

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Re: [Bluez-devel] Erasure of records of previously discovered devices

[Marcel Holtmann]

Hi Teck,

> I wrote a small c program to continuously inquire for nearby bluetooth
> devices and record their address, name and time of discovery. However,
> the program always seems to return a list of devices found earlier,
> even when the discovered device has been switched off. 
>  
> Following is part of the code, which does 5 rounds of inquiry, largely
> derived from Bastian Ballmann's hciscan program. Is there anyway I can
> erase records of previously found devices and do a fresh inquiry
> everytime? 

your code doesn't use hci_inquiry() at all. However you should take a
look a the IREQ_CACHE_FLUSH flag.

Regards

Marcel




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