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VILLASnode/lib/cfg.c

275 lines
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6.4 KiB
C

/** Configuration parser.
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
*********************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include "utils.h"
#include "list.h"
#include "cfg.h"
#include "node.h"
#include "path.h"
#include "hook.h"
#include "advio.h"
#include "web.h"
#include "log.h"
#include "api.h"
#include "plugin.h"
#include "node.h"
#include "kernel/rt.h"
int cfg_init_pre(struct cfg *cfg)
{
config_init(&cfg->cfg);
info("Inititliaze logging sub-system");
log_init(&cfg->log, V, LOG_ALL);
list_init(&cfg->nodes);
list_init(&cfg->paths);
list_init(&cfg->plugins);
return 0;
}
int cfg_init_post(struct cfg *cfg)
{
info("Initialize memory system");
memory_init();
info("Initialize real-time sub-system");
rt_init(cfg->priority, cfg->affinity);
info("Initialize API sub-system");
api_init(&cfg->api, cfg);
info("Initialize web sub-system");
web_init(&cfg->web, &cfg->api);
info("Initialize node types");
list_foreach(struct node *n, &cfg->nodes) { INDENT
config_setting_t *cfg_root = config_root_setting(&cfg->cfg);
node_type_init(n->_vt, cfg->cli.argc, cfg->cli.argv, cfg_root);
}
return 0;
}
int cfg_deinit(struct cfg *cfg)
{
info("De-initializing node types");
list_foreach(struct plugin *p, &plugins) { INDENT
if (p->type == PLUGIN_TYPE_NODE)
node_type_deinit(&p->node);
}
info("De-initializing web interface");
web_deinit(&cfg->web);
info("De-initialize API");
api_deinit(&cfg->api);
info("De-initialize log sub-system");
log_deinit(&cfg->log);
return 0;
}
int cfg_destroy(struct cfg *cfg)
{
config_destroy(&cfg->cfg);
web_destroy(&cfg->web);
log_destroy(&cfg->log);
api_destroy(&cfg->api);
list_destroy(&cfg->plugins, (dtor_cb_t) plugin_destroy, false);
list_destroy(&cfg->paths, (dtor_cb_t) path_destroy, true);
list_destroy(&cfg->nodes, (dtor_cb_t) node_destroy, true);
return 0;
}
int cfg_parse_cli(struct cfg *cfg, int argc, char *argv[])
{
cfg->cli.argc = argc;
cfg->cli.argv = argv;
char *uri = (argc == 2) ? argv[1] : NULL;
return cfg_parse(cfg, uri);
}
int cfg_parse(struct cfg *cfg, const char *uri)
{
config_setting_t *cfg_root, *cfg_nodes, *cfg_paths, *cfg_plugins, *cfg_logging, *cfg_web;
int ret = CONFIG_FALSE;
if (uri) {
/* Setup libconfig */
config_set_auto_convert(&cfg->cfg, 1);
FILE *f;
AFILE *af;
/* Via stdin */
if (strcmp("-", uri) == 0) {
af = NULL;
f = stdin;
}
/* Local file? */
else if (access(uri, F_OK) != -1) {
/* Setup libconfig include path.
* This is only supported for local files */
char *uri_cpy = strdup(uri);
char *include_dir = dirname(uri_cpy);
config_set_include_dir(&cfg->cfg, include_dir);
free(uri_cpy);
af = NULL;
f = fopen(uri, "r");
}
/* Use advio (libcurl) to fetch the config from a remote */
else {
af = afopen(uri, "r", ADVIO_MEM);
f = af ? af->file : NULL;
}
/* Check if file could be loaded / opened */
if (!f)
error("Failed to open configuration from: %s", uri);
/* Parse config */
ret = config_read(&cfg->cfg, f);
if (ret != CONFIG_TRUE)
error("Failed to parse configuration: %s in %s:%d", config_error_text(&cfg->cfg), uri, config_error_line(&cfg->cfg));
/* Close configuration file */
if (af)
afclose(af);
else
fclose(f);
}
else {
warn("No configuration file specified. Starting unconfigured. Use the API to configure this instance.");
cfg->web.port = 80;
cfg->web.htdocs = "/villas/web/socket/";
}
/* Parse global settings */
cfg_root = config_root_setting(&cfg->cfg);
if (cfg_root) {
if (!config_setting_is_group(cfg_root))
warn("Missing global section in config file.");
if (!config_setting_lookup_int(cfg_root, "affinity", &cfg->affinity))
cfg->affinity = 0;
if (!config_setting_lookup_int(cfg_root, "priority", &cfg->priority))
cfg->priority = 0;
if (!config_setting_lookup_float(cfg_root, "stats", &cfg->stats))
cfg->stats = 0;
}
cfg_web = config_setting_get_member(cfg_root, "http");
if (cfg_web)
web_parse(&cfg->web, cfg_web);
/* Parse logging settings */
cfg_logging = config_setting_get_member(cfg_root, "logging");
if (cfg_logging)
log_parse(&cfg->log, cfg_logging);
/* Parse plugins */
cfg_plugins = config_setting_get_member(cfg_root, "plugins");
if (cfg_plugins) {
if (!config_setting_is_array(cfg_plugins))
cerror(cfg_plugins, "Setting 'plugins' must be a list of strings");
for (int i = 0; i < config_setting_length(cfg_plugins); i++) {
struct config_setting_t *cfg_plugin = config_setting_get_elem(cfg_plugins, i);
struct plugin plugin;
ret = plugin_parse(&plugin, cfg_plugin);
if (ret)
cerror(cfg_plugin, "Failed to parse plugin");
list_push(&cfg->plugins, memdup(&plugin, sizeof(plugin)));
}
}
/* Parse nodes */
cfg_nodes = config_setting_get_member(cfg_root, "nodes");
if (cfg_nodes) {
if (!config_setting_is_group(cfg_nodes))
warn("Setting 'nodes' must be a group with node name => group mappings.");
for (int i = 0; i < config_setting_length(cfg_nodes); i++) {
config_setting_t *cfg_node = config_setting_get_elem(cfg_nodes, i);
struct plugin *p;
const char *type;
/* Required settings */
if (!config_setting_lookup_string(cfg_node, "type", &type))
cerror(cfg_node, "Missing node type");
p = plugin_lookup(PLUGIN_TYPE_NODE, type);
if (!p)
cerror(cfg_node, "Invalid node type: %s", type);
struct node *n = node_create(&p->node);
ret = node_parse(n, cfg_node);
if (ret)
cerror(cfg_node, "Failed to parse node");
list_push(&cfg->nodes, n);
}
}
/* Parse paths */
cfg_paths = config_setting_get_member(cfg_root, "paths");
if (cfg_paths) {
if (!config_setting_is_list(cfg_paths))
warn("Setting 'paths' must be a list.");
for (int i = 0; i < config_setting_length(cfg_paths); i++) {
config_setting_t *cfg_path = config_setting_get_elem(cfg_paths, i);
struct path *p = path_create();
ret = path_parse(p, cfg_path, &cfg->nodes);
if (ret)
cerror(cfg_path, "Failed to parse path");
list_push(&cfg->paths, p);
if (p->reverse) {
struct path *r = path_create();
ret = path_reverse(p, r);
if (ret)
cerror(cfg_path, "Failed to reverse path %s", path_name(p));
list_push(&cfg->paths, r);
}
}
}
return 0;
}