ODBC-api hooking problem
Динар Рахимбаев <[email protected]>
| Newsgroups | gmane.comp.db.unixodbc.devel |
|---|---|
| Message-ID | <[email protected]> |
Good afternoon! I have a problem of hooking ODBC-api calls to perform some authority check of SQL-requests. I decided that it is possible if I developed my own driver, which would pass calls from driver manager to the next DBMS-specific driver, or again to the driver manager(driver manager then would call DBMS specific driver) after authority check. I decided to implement my custom driver by the second way (i.e. driver passes calls to the driver manager), because the driver manager performs many routine work of managing environment and connections. So my custom driver loads the driver manager (libodbc.so) using dlmopen(), extracts the entry points using dlsym(), then just passes calls to the corresponding functions of newly loaded driver manager. I'm getting SIGSEGV when my driver passes the call to driver manager's SQLConnect() function. So my question is: is it possible at all to use the driver manager in a such scheme? /**************************************************** Applicaion -> Driver manager 1 -> My custom driver(hook) -> Driver manager 2 -> DBMS specific driver. ****************************************************/ If not, maybe you have some ideas on how to do it using ODBC? Saying again: I need to perform authority check of SQL-requests before requests are passed to DBMS. Moreover, I must be able to reject unauthorized requests. Thank you for attention! _______________________________________________ unixODBC-dev mailing list [email protected] http://mailman.unixodbc.org/mailman/listinfo/unixodbc-dev