int OWNET_present(OWNET_HANDLE h, const char *onewire_path)
{
unsigned char buffer[MAX_READ_BUFFER_SIZE];
int return_value;
struct request_packet s_request_packet;
struct request_packet *rp = &s_request_packet;
memset(rp, 0, sizeof(struct request_packet));
CONNIN_RLOCK;
rp->owserver = find_connection_in(h);
if (rp->owserver == NULL) {
CONNIN_RUNLOCK;
return -EBADF;
}
rp->path = (onewire_path == NULL) ? "/" : onewire_path;
rp->read_value = buffer;
rp->data_length = MAX_READ_BUFFER_SIZE;
rp->data_offset = 0;
return_value = ServerPresence(rp);
/* 0 is ok, <0 not found */
CONNIN_RUNLOCK;
return return_value;
}
static INDEX_OR_ERROR ServerAlias( BYTE * sn, struct connection_in * in, struct parsedname * pn )
{
if ( in != NO_CONNECTION ) {
struct parsedname s_pn_copy;
struct parsedname * pn_copy = &s_pn_copy ;
INDEX_OR_ERROR bus_nr ;
memcpy(pn_copy, pn, sizeof(struct parsedname)); // shallow copy
pn_copy->selected_connection = in;
bus_nr = ServerPresence( pn_copy) ;
memcpy( sn, pn_copy->sn, SERIAL_NUMBER_SIZE );
return bus_nr ;
}
return INDEX_BAD ;
}
// Look on a given connection for the device
static INDEX_OR_ERROR CheckThisConnection(int bus_nr, struct parsedname *pn)
{
struct parsedname s_pn_copy;
struct parsedname * pn_copy = &s_pn_copy ;
struct connection_in * in = find_connection_in(bus_nr) ;
INDEX_OR_ERROR connection_result = INDEX_BAD ;
if ( in == NO_CONNECTION ) {
return INDEX_BAD ;
}
memcpy(pn_copy, pn, sizeof(struct parsedname)); // shallow copy
pn_copy->selected_connection = in;
if ( BAD( TestConnection(pn_copy) ) ) {
// Connection currently disconnected
return INDEX_BAD;
} else if (BusIsServer(in)) {
// Server
if ( INDEX_VALID( ServerPresence(pn_copy) ) ) {
connection_result = in->index;
}
} else if ( in->iroutines.flags & ADAP_FLAG_sham ) {
return INDEX_BAD ;
} else if ( in->iroutines.flags & ADAP_FLAG_presence_from_dirblob ) {
// local connection with a dirblob (like fake, mock, ...)
if ( GOOD( PresenceFromDirblob( pn_copy ) ) ) {
connection_result = in->index ;
}
} else {
// local connection but need to ask directly
struct transaction_log t[] = {
TRXN_NVERIFY,
TRXN_END,
};
if ( GOOD( BUS_transaction(t, pn_copy) ) ) {
connection_result = in->index ;
}
}
if ( connection_result == INDEX_BAD ) {
LEVEL_DEBUG("Presence of "SNformat" NOT found on bus %s",SNvar(pn_copy->sn),SAFESTRING(DEVICENAME(in))) ;
} else {
LEVEL_DEBUG("Presence of "SNformat" FOUND on bus %s",SNvar(pn_copy->sn),SAFESTRING(DEVICENAME(in))) ;
Cache_Add_Device(in->index,pn_copy->sn) ; // add or update cache */
}
return connection_result ;
}
