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/**
* @file src/module.c Module loading
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <baresip.h>
#include "core.h"
/*
* Append module extension, if not exist
*
* input: foobar
* output: foobar.so
*
*/
static void append_extension(char *buf, size_t sz, const char *name)
{
if (0 == re_regex(name, str_len(name), "[^.]+"MOD_EXT, NULL)) {
str_ncpy(buf, name, sz);
}
else {
re_snprintf(buf, sz, "%s"MOD_EXT, name);
}
}
#ifdef STATIC
/* Declared in static.c */
extern const struct mod_export *mod_table[];
static const struct mod_export *lookup_static_module(const struct pl *pl)
{
struct pl name;
uint32_t i;
if (re_regex(pl->p, pl->l, "[^.]+.[^]*", &name, NULL))
name = *pl;
for (i=0; ; i++) {
const struct mod_export *me = mod_table[i];
if (!me)
return NULL;
if (0 == pl_strcasecmp(&name, me->name))
return me;
}
return NULL;
}
#endif
static int load_module(struct mod **modp, const struct pl *modpath,
const struct pl *name)
{
char file[FS_PATH_MAX];
char namestr[256];
struct mod *m = NULL;
int err = 0;
if (!name)
return EINVAL;
#ifdef STATIC
/* Try static first */
pl_strcpy(name, namestr, sizeof(namestr));
if (mod_find(namestr)) {
info("static module already loaded: %r\n", name);
return EALREADY;
}
err = mod_add(&m, lookup_static_module(name));
if (!err)
goto out;
#else
(void)namestr;
#endif
/* Then dynamic */
if (re_snprintf(file, sizeof(file), "%r/%r", modpath, name) < 0) {
err = ENOMEM;
goto out;
}
err = mod_load(&m, file);
if (err)
goto out;
out:
if (err) {
warning("module %r: %m\n", name, err);
}
else if (modp)
*modp = m;
return err;
}
static int module_handler(const struct pl *val, void *arg)
{
(void)load_module(NULL, arg, val);
return 0;
}
static int module_tmp_handler(const struct pl *val, void *arg)
{
struct mod *mod = NULL;
(void)load_module(&mod, arg, val);
mem_deref(mod);
return 0;
}
static int module_app_handler(const struct pl *val, void *arg)
{
struct mod *mod = NULL;
const struct mod_export *me;
debug("module: loading app %r\n", val);
if (load_module(&mod, arg, val)) {
return 0;
}
me = mod_export(mod);
if (0 != str_casecmp(me->type, "application")) {
warning("module_app %r should be type application (%s)\n",
val, me->type);
}
return 0;
}
int module_init(const struct conf *conf)
{
struct pl path;
int err;
if (!conf)
return EINVAL;
if (conf_get(conf, "module_path", &path))
pl_set_str(&path, ".");
err = conf_apply(conf, "module", module_handler, &path);
if (err)
return err;
err = conf_apply(conf, "module_tmp", module_tmp_handler, &path);
if (err)
return err;
err = conf_apply(conf, "module_app", module_app_handler, &path);
if (err)
return err;
return 0;
}
void module_app_unload(void)
{
struct le *le = list_tail(mod_list());
/* unload in reverse order */
while (le) {
struct mod *mod = le->data;
const struct mod_export *me = mod_export(mod);
le = le->prev;
if (me && 0 == str_casecmp(me->type, "application")) {
debug("module: unloading app %s\n", me->name);
mem_deref(mod);
}
}
}
int module_preload(const char *module)
{
struct pl path, name;
if (!module)
return EINVAL;
pl_set_str(&path, ".");
pl_set_str(&name, module);
return load_module(NULL, &path, &name);
}
/**
* Load a module by name or by filename
*
* @param name Module name incl/excl extension, excluding module path
*
* @return 0 if success, otherwise errorcode
*
* example: "foo"
* example: "foo.so"
*/
int module_load(const char *name)
{
char filename[256];
struct pl path, pl_name;
int err;
if (!str_isset(name))
return EINVAL;
append_extension(filename, sizeof(filename), name);
pl_set_str(&pl_name, filename);
if (conf_get(conf_cur(), "module_path", &path))
pl_set_str(&path, ".");
err = load_module(NULL, &path, &pl_name);
return err;
}
/**
* Unload a module by name or by filename
*
* @param name module name incl/excl extension, excluding module path
*
* example: "foo"
* example: "foo.so"
*/
void module_unload(const char *name)
{
char filename[256];
struct mod *mod;
if (!str_isset(name))
return;
append_extension(filename, sizeof(filename), name);
mod = mod_find(filename);
if (mod) {
info("unloading module: %s\n", filename);
mem_deref(mod);
return;
}
info("ERROR: Module %s is not currently loaded\n", name);
}
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