[gpsd-users] decode antenna status in the daemon, how to get it to the clients ?

[tom]

Hello,

I've asked questions before about forwarding UBX_MON_HW messages, and was told:

  "I would just add the decoder in driver_ubx.c.  Then you'll get a nice 
   message.  Or just watch the raw sentences as they come back.  no need for
   a raw hook." 

and 

   "You can look in driver_ubx.c for how the other messages are decoded.  Adding a new decode is easy."

I looked at driver_ubx_c and i do find that there is a good spot to handle the message

case UBX_MON_HW:
	gpsd_report(LOG_IO, "UBX_MON_HW\n");
	// my addition..:
	ubx_msg_mon_hw(session, &buf[6], data_len);
	break;

and added a unsigned int ant_status in the ubx driver:

static void ubx_msg_mon_hw(struct gps_device_t *session, unsigned char *buf, size_t data_len)
{

    // first field to decode... i know there are more..

    session->driver.ubx.ant_status = (unsigned int)getub(buf, 20);

    switch( session->driver.ubx.ant_status )
    {
        case 0:
            gpsd_report(LOG_IO, "ANT_STATUS: INIT\n");
        break;
        case 1:
            gpsd_report(LOG_IO, "ANT_STATUS: DONT_KNOW\n");
        break;
        case 2:
            gpsd_report(LOG_IO, "ANT_STATUS: OK\n");
        break;
        case 3:
            gpsd_report(LOG_IO, "ANT_STATUS: SHORT\n");
        break;
        case 4:
            gpsd_report(LOG_IO, "ANT_STATUS: OPEN\n");
        break;
        default:
            gpsd_report(LOG_IO, "ANT_STATUS: : %d\n", session->driver.ubx.ant_status );
        break;
    }
}

and this works.. it picks up the values of the Antenna correctly. (Yay)

How would i go about forwarding this antenna status back to the gpsd-lib client ? Or am i abusing gpsd for something that is too device specific ?

Kind Regards,

Tom