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/* client_context.c -- Handles eurephia contexts used by admin interfaces
*
* GPLv2 only - Copyright (C) 2008, 2009
* 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 client_context.c
* @author David Sommerseth <dazo@users.sourceforge.net>
* @date 2008-12-01
*
* @brief Functions for working with eurephiaCTX outside the openvpn plug-in
*
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <eurephia_nullsafe.h>
#include <eurephia_context.h>
#include <eurephia_values_struct.h>
#include <eurephia_values.h>
#include <eurephiadb.h>
/**
* Initialises a new eurephiaCTX. This function also initialises the database driver, which must
* be configured in the configuration.
*
* @param log FILE pointer where to put log data
* @param loglevel Set the log level (verbosity)
* @param cfg eurephiaVALUES pointer to the configuration
*
* @return Returns a pointer to a eurephiaCTX, otherwise NULL.
*/
eurephiaCTX *eurephiaCTX_init(FILE *log, const int loglevel, eurephiaVALUES *cfg) {
eurephiaCTX *ctx = NULL;
char *dbdriver = NULL, *logfile = NULL;
int cfgloglvl = 0;
dbdriver = eGet_value(cfg, "database_driver");
if( dbdriver == NULL ) {
fprintf(stderr, "ERROR: No database driver given in config file (database_driver)\n");
return NULL;
}
ctx = (eurephiaCTX *) malloc(sizeof(eurephiaCTX)+2);
assert(ctx != NULL);
memset(ctx, 0, sizeof(eurephiaCTX)+2);
ctx->context_type = ECTX_ADMIN_CONSOLE;
// Open log file. Use config file as default if it exists, if not use input param.
logfile = eGet_value(cfg, "log");
if( (logfile != NULL) && (log == NULL) ) {
if( strcmp(logfile, "stdout:") == 0 ) {
ctx->log = stdout;
} else if( strcmp(logfile, "stderr:") == 0 ) {
ctx->log = stderr;
} else if( strcmp(logfile, "none:") == 0 ) {
ctx->log = NULL;
} else if( (ctx->log = fopen(logfile, "aw")) == NULL ) {
fprintf(stderr, "ERROR: Could not open log file: %s\n", logfile);
free_nullsafe(ctx);
return NULL;
}
} else {
// If log file is not set in config, use input log parameter. But if
// no log file is defined even here, use stderr. If no logging is wanted, it
// must be defined as none: in the config file.
ctx->log = (log != NULL ? log : stderr);
}
// Set log level. Use config file as default if it exists, if not input param defaults.
// But if input param loglevel > 0, then override config file.
// Only set loglevel if logging is enabled.
if( ctx->log != NULL ) {
cfgloglvl = ((eGet_value(cfg, "log_level") == NULL)
? loglevel : atoi_nullsafe(eGet_value(cfg, "log_level")));
ctx->loglevel = (loglevel > 0 ? loglevel : cfgloglvl);
} else {
ctx->loglevel = 0;
}
if( !eDBlink_init(ctx, dbdriver, 2) ) {
eurephia_log(ctx, LOG_PANIC, 0, "Could not load the database driver");
free_nullsafe(ctx);
return NULL;
}
return ctx;
}
/**
* Takes care of tearing down a eurephiaCTX in a proper way. It will disconnect from the
* database and unload the database driver if needed.
*
* @param ctx eurephiaCTX to take down.
*/
void eurephiaCTX_destroy(eurephiaCTX *ctx) {
if( ctx == NULL ) {
return;
}
if( (ctx->dbc != NULL) && (ctx->dbc->dbhandle != NULL) ) {
eDBdisconnect(ctx);
}
if( ctx->eurephia_driver != NULL ) {
eDBlink_close(ctx);
}
if( ctx->log != NULL ) {
fflush(ctx->log);
// Do not close log file if we're on stdout or stderr
if( (ctx->log != stderr) && (ctx->log != stdout) ) {
eurephia_log(ctx, LOG_INFO, 2, "Closing log file");
fclose(ctx->log);
}
ctx->log = NULL;
ctx->loglevel = 0;
}
free_nullsafe(ctx);
}
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