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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.0 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file common/config/config_load_configmodule.c
* \brief configuration module, load the shared library implementing the configuration module
* \author Francois TABURET
* \date 2017
* \version 0.1
* \company NOKIA BellLabs France
* \email: francois.taburet@nokia-bell-labs.com
* \note
* \warning
*/
#define _GNU_SOURCE
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <dlfcn.h>
#define CONFIG_LOADCONFIG_MAIN
#include "config_load_configmodule.h"
#include "config_userapi.h"
#define CONFIG_SHAREDLIBFORMAT "libparams_%s.so"
int load_config_sharedlib(configmodule_interface_t *cfgptr)
{
void *lib_handle;
char fname[128];
char libname[FILENAME_MAX];
int st;
st=0;
sprintf(libname,CONFIG_SHAREDLIBFORMAT,cfgptr->cfgmode);
lib_handle = dlopen(libname,RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE);
if (!lib_handle) {
fprintf(stderr,"[CONFIG] %s %d Error calling dlopen(%s): %s\n",__FILE__, __LINE__, libname,dlerror());
st = -1;
} else {
sprintf (fname,"config_%s_init",cfgptr->cfgmode);
cfgptr->init = dlsym(lib_handle,fname);
if (cfgptr->init == NULL ) {
printf("[CONFIG] %s %d no function %s for config mode %s\n",
__FILE__, __LINE__,fname, cfgptr->cfgmode);
} else {
st=cfgptr->init(cfgptr->cfgP,cfgptr->num_cfgP);
printf("[CONFIG] function %s returned %i\n",
fname, st);
}
sprintf (fname,"config_%s_get",cfgptr->cfgmode);
cfgptr->get = dlsym(lib_handle,fname);
if (cfgptr->get == NULL ) {
printf("[CONFIG] %s %d no function %s for config mode %s\n",
__FILE__, __LINE__,fname, cfgptr->cfgmode);
st = -1;
}
sprintf (fname,"config_%s_getlist",cfgptr->cfgmode);
cfgptr->getlist = dlsym(lib_handle,fname);
if (cfgptr->getlist == NULL ) {
printf("[CONFIG] %s %d no function %s for config mode %s\n",
__FILE__, __LINE__,fname, cfgptr->cfgmode);
st = -1;
}
sprintf (fname,"config_%s_end",cfgptr->cfgmode);
cfgptr->end = dlsym(lib_handle,fname);
if (cfgptr->getlist == NULL ) {
printf("[CONFIG] %s %d no function %s for config mode %s\n",
__FILE__, __LINE__,fname, cfgptr->cfgmode);
}
}
return st;
}
/*-----------------------------------------------------------------------------------*/
/* from here: interface implementtion of the configuration module */
configmodule_interface_t *load_configmodule(int argc, char **argv)
{
char *cfgparam=NULL;
char *modeparams=NULL;
char *cfgmode=NULL;
char *strtokctx=NULL;
char *atoken;
uint32_t tmpflags=0;
int i;
/* first parse the command line to look for the -O option */
opterr=0;
for (i = 0;i<argc;i++) {
if (strlen(argv[i]) < 2) continue;
if ( argv[i][1] == 'O' && i < (argc -1)) {
cfgparam = argv[i+1];
}
if ( argv[i][1] == 'h' ) {
tmpflags = CONFIG_HELP;
}
}
optind=1;
/* look for the OAI_CONFIGMODULE environement variable */
if ( cfgparam == NULL ) {
cfgparam = getenv("OAI_CONFIGMODULE");
}
/* default */
if (cfgparam == NULL) {
cfgparam = "libconfig:oaisoftmodem.conf";
}
/* parse the config parameters to set the config source */
i = sscanf(cfgparam,"%m[^':']:%ms",&cfgmode,&modeparams);
if (i< 0) {
fprintf(stderr,"[CONFIG] %s, %d, sscanf error parsing config source %s: %s\n", __FILE__, __LINE__,cfgparam, strerror(errno));
cfgmode=strdup("libconfig");
modeparams = strdup("oaisoftmodem.conf");
}
else if ( i == 1 ) {
/* -O argument doesn't contain ":" separator, assume -O <conf file> option, default cfgmode to libconfig
with one parameter, the path to the configuration file */
modeparams=cfgmode;
cfgmode=strdup("libconfig");
}
cfgptr = malloc(sizeof(configmodule_interface_t));
memset(cfgptr,0,sizeof(configmodule_interface_t));
cfgptr->rtflags = cfgptr->rtflags | tmpflags;
cfgptr->argc = argc;
cfgptr->argv = argv;
cfgptr->cfgmode=strdup(cfgmode);
cfgptr->num_cfgP=0;
atoken=strtok_r(modeparams,":",&strtokctx);
while ( cfgptr->num_cfgP< CONFIG_MAX_OOPT_PARAMS && atoken != NULL) {
/* look for debug level in the config parameters, it is commom to all config mode
and will be removed frome the parameter array passed to the shared module */
char *aptr;
aptr=strcasestr(atoken,"dbgl");
if (aptr != NULL) {
cfgptr->rtflags = cfgptr->rtflags | strtol(aptr+4,NULL,0);
} else {
cfgptr->cfgP[cfgptr->num_cfgP] = strdup(atoken);
cfgptr->num_cfgP++;
}
atoken = strtok_r(NULL,":",&strtokctx);
}
printf("[CONFIG] get parameters from %s ",cfgmode);
for (i=0;i<cfgptr->num_cfgP; i++) {
printf("%s ",cfgptr->cfgP[i]);
}
printf("\n");
i=load_config_sharedlib(cfgptr);
if (i< 0) {
fprintf(stderr,"[CONFIG] %s %d config module %s couldn't be loaded\n", __FILE__, __LINE__,cfgmode);
cfgptr->rtflags = cfgptr->rtflags | CONFIG_HELP | CONFIG_ABORT;
} else {
printf("[CONFIG] config module %s loaded\n",cfgmode);
Config_Params[CONFIGPARAM_DEBUGFLAGS_IDX].uptr=&(cfgptr->rtflags);
config_get(Config_Params,CONFIG_PARAMLENGTH(Config_Params), CONFIG_SECTIONNAME );
}
if (modeparams != NULL) free(modeparams);
if (cfgmode != NULL) free(cfgmode);
if (CONFIG_ISFLAGSET(CONFIG_ABORT)) config_printhelp(Config_Params,CONFIG_PARAMLENGTH(Config_Params));
return cfgptr;
}
void end_configmodule()
{
if (cfgptr != NULL) {
if (cfgptr->end != NULL) {
printf ("[CONFIG] calling config module end function...\n");
cfgptr->end();
}
if( cfgptr->cfgmode != NULL) free(cfgptr->cfgmode);
printf ("[CONFIG] free %u config parameter pointers\n",cfgptr->num_cfgP);
for (int i=0; i<cfgptr->num_cfgP; i++) {
if ( cfgptr->cfgP[i] != NULL) free(cfgptr->cfgP[i]);
}
printf ("[CONFIG] free %u config value pointers\n",cfgptr->numptrs);
for(int i=0; i<cfgptr->numptrs ; i++) {
if (cfgptr->ptrs[i] != NULL) {
free(cfgptr->ptrs[i]);
}
cfgptr->ptrs[i]=NULL;
}
free(cfgptr);
cfgptr=NULL;
}
}