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/* eurephiadb.c -- Loads and initialises the database driver
*
* GPLv2 only - Copyright (C) 2008 - 2012
* David Sommerseth <dazo@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* @file eurephiadb.c
* @author David Sommerseth <dazo@users.sourceforge.net>
* @date 2008-08-06
*
* @brief Handles loading and initialising of the database drivers
*
*/
#include <stdio.h>
#include <dlfcn.h>
#include "eurephia_nullsafe.h"
#include "eurephiadb_driver.h"
#include "eurephia_log.h"
#include "eurephia_getsym.h"
/**
* Unloads the database driver
*
* @param ctx eurephiaCTX
*
* @return Returns always 1.
*/
int eDBlink_close(eurephiaCTX *ctx)
{
if( ctx == NULL ) {
return 1;
}
eurephia_log(ctx, LOG_INFO, 3, "Unloading eurephia database driver");
if( ctx->eurephia_driver != NULL ) {
dlclose(ctx->eurephia_driver);
ctx->eurephia_driver = NULL;
}
return 1;
}
/**
* Loads and initialises the database driver.
*
* @param ctx eurephiaCTX to which the database driver will be associated with
* @param dbdriver Full path to the driver file (.so)
* @param minver The required minimum API level of the driver
*
* @return Returns 1 on success, otherwise 0.
*/
int eDBlink_init(eurephiaCTX *ctx, const char *dbdriver, const int minver)
{
int apiver = -1;
if( dbdriver == NULL ) {
eurephia_log(ctx, LOG_FATAL, 0, "No eurephia database driver configured. "
"eurephia authentication will not be available");
return 0;
}
eurephia_log(ctx, LOG_INFO, 2, "Loading eurephia database driver: %s", dbdriver);
ctx->eurephia_driver = dlopen(dbdriver, RTLD_NOW);
if( ctx->eurephia_driver == NULL ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not open the eurephia database driver (%s)", dbdriver);
eurephia_log(ctx, LOG_FATAL, 1, "dlopen error: %s", dlerror());
return 0;
}
// Find mandatory functions containing driver information
eDB_DriverVersion = eGetSym(ctx, ctx->eurephia_driver, "eDB_DriverVersion");
eDB_DriverAPIVersion = eGetSym(ctx, ctx->eurephia_driver, "eDB_DriverAPIVersion");
eurephia_log(ctx, LOG_INFO, 1, "Driver loaded: %s (API version %i)",
eDB_DriverVersion(), eDB_DriverAPIVersion());
// Check that we are using at least a new enough driver
if( eDB_DriverAPIVersion() < minver ) {
eurephia_log(ctx, LOG_FATAL, 0,
"The requested eurephia database driver is too old. This program needs "
"API version %i, but this driver only supports API version %i.\n",
minver, eDB_DriverAPIVersion());
return 0;
}
// Configure functions contained in the driver, defined by API version
apiver = (eDB_DriverAPIVersion() > minver ? minver : eDB_DriverAPIVersion());
switch( apiver ) {
case -1:
eurephia_log(ctx, LOG_FATAL, 0, "Something unexpected happened - apiver==-1");
ctx->fatal_error = 1;
break;
default:
eurephia_log(ctx, LOG_WARNING, 0,
"eurephia database driver API is newer than the running eurephia version. Consider "
"to upgrade eurephia to take advantage of newer features in the driver.");
case 3:
eDBregister_vpnclientaddr = eGetSym(ctx, ctx->eurephia_driver, "eDBregister_vpnclientaddr");
case 2:
#ifdef ENABLE_EUREPHIADM
if( (ctx->context_type != ECTX_NO_PRIVILEGES) && (ctx->context_type != ECTX_PLUGIN_AUTH) ) {
// These functions are only available in admin context
eDBadminAuthenticate = eGetSym(ctx, ctx->eurephia_driver, "eDBadminAuthenticate");
eDBadminConfiguration = eGetSym(ctx, ctx->eurephia_driver, "eDBadminConfiguration");
eDBadminUserAccount = eGetSym(ctx, ctx->eurephia_driver, "eDBadminUserAccount");
eDBadminCertificate = eGetSym(ctx, ctx->eurephia_driver, "eDBadminCertificate");
eDBadminUserCertsLink = eGetSym(ctx, ctx->eurephia_driver, "eDBadminUserCertsLink");
eDBadminAccessLevel = eGetSym(ctx, ctx->eurephia_driver, "eDBadminAccessLevel");
eDBadminFirewallProfiles = eGetSym(ctx, ctx->eurephia_driver,
"eDBadminFirewallProfiles");
eDBadminGetLastlog = eGetSym(ctx, ctx->eurephia_driver, "eDBadminGetLastlog");
eDBadminAttemptsLog = eGetSym(ctx, ctx->eurephia_driver, "eDBadminAttemptsLog");
eDBadminBlacklist = eGetSym(ctx, ctx->eurephia_driver, "eDBadminBlacklist");
}
#endif
case 1:
// Setup eDBlink functions
eDBconnect = eGetSym(ctx, ctx->eurephia_driver, "eDBconnect");
eDBdisconnect = eGetSym(ctx, ctx->eurephia_driver, "eDBdisconnect");
eDBauth_TLS = eGetSym(ctx, ctx->eurephia_driver, "eDBauth_TLS");
eDBauth_user = eGetSym(ctx, ctx->eurephia_driver, "eDBauth_user");
eDBget_uid = eGetSym(ctx, ctx->eurephia_driver, "eDBget_uid");
eDBblacklist_check = eGetSym(ctx, ctx->eurephia_driver, "eDBblacklist_check");
eDBregister_attempt = eGetSym(ctx, ctx->eurephia_driver, "eDBregister_attempt");
eDBregister_login = eGetSym(ctx, ctx->eurephia_driver, "eDBregister_login");
// If api version is 3, this function is replaced by eDBregister_vpnclientaddr()
eDBregister_vpnmacaddr = (apiver < 3 ?
eGetSym(ctx, ctx->eurephia_driver, "eDBregister_vpnmacaddr") : NULL);
eDBregister_logout = eGetSym(ctx, ctx->eurephia_driver, "eDBregister_logout");
eDBget_firewall_profile = eGetSym(ctx, ctx->eurephia_driver, "eDBget_firewall_profile");
eDBget_blacklisted_ip = eGetSym(ctx, ctx->eurephia_driver, "eDBget_blacklisted_ip");
eDBget_sessionkey_seed = eGetSym(ctx, ctx->eurephia_driver, "eDBget_sessionkey_seed");
eDBget_sessionkey_macaddr = eGetSym(ctx, ctx->eurephia_driver, "eDBget_sessionkey_macaddr");
eDBcheck_sessionkey_uniqueness = eGetSym(ctx, ctx->eurephia_driver,
"eDBcheck_sessionkey_uniqueness");
eDBregister_sessionkey = eGetSym(ctx, ctx->eurephia_driver, "eDBregister_sessionkey");
eDBload_sessiondata = eGetSym(ctx, ctx->eurephia_driver, "eDBload_sessiondata");
eDBstore_session_value = eGetSym(ctx, ctx->eurephia_driver, "eDBstore_session_value");
eDBdestroy_session = eGetSym(ctx, ctx->eurephia_driver, "eDBdestroy_session");
break;
}
if( ctx->fatal_error > 0 ) {
eurephia_log(ctx, LOG_FATAL, 0, "The eurephia database driver is not correctly initialised. "
"eurephia authentication will not be available");
eDBlink_close(ctx);
return 0;
}
return 1;
}
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