//open a port (serial or tcp)
GOOD_OR_BAD COM_open(struct connection_in *connection)
{
struct port_in * pin ;
struct connection_in * head_in ;
if (connection == NO_CONNECTION) {
LEVEL_DEBUG("Attempt to open a NULL serial device");
return gbBAD;
}
pin = connection->pown ;
head_in = pin->first ; // head of multigroup bus
switch ( pin->state ) {
case cs_deflowered:
// Attempt to reopen a good connection?
COM_close(head_in) ;
break ;
case cs_virgin:
break ;
}
switch ( pin->type ) {
case ct_telnet:
if ( pin->dev.telnet.telnet_negotiated == completed_negotiation ) {
pin->dev.telnet.telnet_negotiated = needs_negotiation ;
}
pin->dev.telnet.telnet_supported = 0 ;
return tcp_open( head_in ) ;
case ct_tcp:
return tcp_open( head_in ) ;
case ct_netlink:
#if OW_W1
return w1_bind( connection ) ;
#endif /* OW_W1 */
case ct_i2c:
case ct_usb:
LEVEL_DEBUG("Unimplemented");
return gbBAD ;
case ct_serial:
return serial_open( head_in ) ;
case ct_unknown:
case ct_none:
default:
LEVEL_DEBUG("Unknown type.");
return gbBAD ;
}
}
/* Device-specific functions */
GOOD_OR_BAD W1_monitor_detect(struct port_in *pin)
{
struct connection_in * in = pin->first ;
struct timeval tvslack = { 1, 0 } ; // 1 second
pin->file_descriptor = FILE_DESCRIPTOR_BAD;
pin->type = ct_none ;
in->iroutines.detect = W1_monitor_detect;
in->Adapter = adapter_w1_monitor; /* OWFS assigned value */
in->iroutines.reset = NO_RESET_ROUTINE;
in->iroutines.next_both = NO_NEXT_BOTH_ROUTINE;
in->iroutines.PowerByte = NO_POWERBYTE_ROUTINE;
in->iroutines.ProgramPulse = NO_PROGRAMPULSE_ROUTINE;
in->iroutines.sendback_data = NO_SENDBACKDATA_ROUTINE;
in->iroutines.sendback_bits = NO_SENDBACKBITS_ROUTINE;
in->iroutines.select = NO_SELECT_ROUTINE;
in->iroutines.select_and_sendback = NO_SELECTANDSENDBACK_ROUTINE;
in->iroutines.set_config = NO_SET_CONFIG_ROUTINE;
in->iroutines.get_config = NO_GET_CONFIG_ROUTINE;
in->iroutines.reconnect = NO_RECONNECT_ROUTINE;
in->iroutines.close = W1_monitor_close;
in->iroutines.verify = NO_VERIFY_ROUTINE ;
in->iroutines.flags = ADAP_FLAG_sham;
in->adapter_name = "W1 monitor";
pin->busmode = bus_w1_monitor ;
RETURN_BAD_IF_BAD( w1_monitor_in_use(in) ) ;
// Initial setup
Inbound_Control.w1_monitor = in ; // essentially a global pointer to the w1_monitor entry
_MUTEX_INIT(in->master.w1_monitor.seq_mutex);
_MUTEX_INIT(in->master.w1_monitor.read_mutex);
timernow( &(in->master.w1_monitor.last_read) );
timeradd( &(in->master.w1_monitor.last_read), &tvslack, &(in->master.w1_monitor.last_read) );
in->master.w1_monitor.seq = SEQ_INIT ;
in->master.w1_monitor.pid = 0 ;
w1_bind(in) ; // sets in->file_descriptor
if ( FILE_DESCRIPTOR_NOT_VALID( in->pown->file_descriptor ) ) {
ERROR_DEBUG("Netlink problem -- are you root?");
Inbound_Control.w1_monitor = NO_CONNECTION ;
return gbBAD ;
}
return W1_Browse() ; // creates thread that runs forever.
}