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/* Copyright 2022 IGEL Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#include "lease-config.h"
#include "log.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <toml.h>
#define CONFIG_ERROR(x, ...) ERROR_LOG("%s: " x, filename, ##__VA_ARGS__)
static bool populate_connector_config(struct lease_config *config,
toml_array_t *conns)
{
int nconnectors = toml_array_nelem(conns);
config->connectors = calloc(nconnectors, sizeof(*config->connectors));
if (!config->connectors) {
DEBUG_LOG("Memory allocation failed: %s\n", strerror(errno));
return false;
}
config->nconnectors = nconnectors;
for (int i = 0; i < config->nconnectors; i++) {
toml_datum_t conn = toml_string_at(conns, i);
if (!conn.ok) {
ERROR_LOG("Invalid connector in lease %s: idx:%d\n",
config->lease_name, i);
return false;
}
config->connectors[i].name = conn.u.s;
}
return true;
}
int parse_config(char *filename, struct lease_config **parsed_config)
{
struct lease_config *config = NULL;
int nconfigs, i, ret = 0;
char parse_error[160];
FILE *fp = fopen(filename, "r");
if (!fp)
return 0;
toml_table_t *t_config =
toml_parse_file(fp, parse_error, sizeof parse_error);
if (!t_config) {
CONFIG_ERROR("configuration file parse error: %s\n",
parse_error);
fclose(fp);
return 0;
}
toml_array_t *leases = toml_array_in(t_config, "lease");
if (!leases) {
CONFIG_ERROR(
"Invalid config - cannot find any 'lease' configs");
goto err;
}
nconfigs = toml_array_nelem(leases);
config = calloc(nconfigs, sizeof *config);
if (!config) {
DEBUG_LOG("Memory allocation failed: %s\n", strerror(errno));
goto err;
}
for (i = 0; i < toml_array_nelem(leases); i++) {
toml_table_t *lease = toml_table_at(leases, i);
toml_datum_t name = toml_string_in(lease, "name");
if (!name.ok) {
CONFIG_ERROR("Invalid lease name in entry #%d\n", i);
goto err_free_config;
}
config[i].lease_name = name.u.s;
toml_array_t *conns = toml_array_in(lease, "connectors");
if (conns && !populate_connector_config(&config[i], conns)) {
CONFIG_ERROR("Error configuring lease: %s\n",
config[i].lease_name);
goto err_free_config;
}
}
*parsed_config = config;
ret = nconfigs;
err:
toml_free(t_config);
fclose(fp);
return ret;
err_free_config:
release_config(i, config);
goto err;
}
void release_config(int num_leases, struct lease_config *config)
{
for (int i = 0; i < num_leases; i++) {
struct lease_config *c = &config[i];
free(c->lease_name);
for (int j = 0; j < c->nconnectors; j++)
free(c->connectors[j].name);
free(c->connectors);
}
free(config);
}
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