#include "plugin_feature.h"
+#include <debug.h>
+
ENUM(plugin_feature_names, FEATURE_NONE, FEATURE_CUSTOM,
"NONE",
"CRYPTER",
}
return str;
}
+
+/**
+ * See header.
+ */
+bool plugin_feature_load(plugin_t *plugin, plugin_feature_t *feature,
+ plugin_feature_t *reg)
+{
+ char *name;
+
+ if (!reg)
+ { /* noting to do for this feature */
+ return TRUE;
+ }
+ if (reg->kind == FEATURE_CALLBACK)
+ {
+ if (reg->arg.cb.f(plugin, feature, TRUE, reg->arg.cb.data))
+ {
+ return TRUE;
+ }
+ return FALSE;
+ }
+ name = plugin->get_name(plugin);
+ switch (feature->type)
+ {
+ case FEATURE_CRYPTER:
+ lib->crypto->add_crypter(lib->crypto, feature->arg.crypter.alg,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_AEAD:
+ lib->crypto->add_aead(lib->crypto, feature->arg.aead.alg,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_SIGNER:
+ lib->crypto->add_signer(lib->crypto, feature->arg.signer,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_HASHER:
+ lib->crypto->add_hasher(lib->crypto, feature->arg.hasher,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_PRF:
+ lib->crypto->add_prf(lib->crypto, feature->arg.prf,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_DH:
+ lib->crypto->add_dh(lib->crypto, feature->arg.dh_group,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_RNG:
+ lib->crypto->add_rng(lib->crypto, feature->arg.rng_quality,
+ name, reg->arg.reg.f);
+ break;
+ case FEATURE_PRIVKEY:
+ case FEATURE_PRIVKEY_GEN:
+ lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY,
+ feature->arg.privkey, reg->arg.reg.final,
+ reg->arg.reg.f);
+ break;
+ case FEATURE_PUBKEY:
+ lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY,
+ feature->arg.pubkey, reg->arg.reg.final,
+ reg->arg.reg.f);
+ break;
+ case FEATURE_CERT_DECODE:
+ case FEATURE_CERT_ENCODE:
+ lib->creds->add_builder(lib->creds, CRED_CERTIFICATE,
+ feature->arg.cert, reg->arg.reg.final,
+ reg->arg.reg.f);
+ break;
+ case FEATURE_DATABASE:
+ lib->db->add_database(lib->db, reg->arg.reg.f);
+ break;
+ case FEATURE_FETCHER:
+ lib->fetcher->add_fetcher(lib->fetcher, reg->arg.reg.f,
+ feature->arg.fetcher);
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
+
+/**
+ * See header.
+ */
+bool plugin_feature_unload(plugin_t *plugin, plugin_feature_t *feature,
+ plugin_feature_t *reg)
+{
+ char *name;
+
+ if (!reg)
+ { /* noting to do for this feature */
+ return TRUE;
+ }
+ name = plugin->get_name(plugin);
+ if (reg->kind == FEATURE_CALLBACK)
+ {
+ if (reg->arg.cb.f(plugin, feature, FALSE, reg->arg.cb.data))
+ {
+ return TRUE;
+ }
+ return FALSE;
+ }
+ switch (feature->type)
+ {
+ case FEATURE_CRYPTER:
+ lib->crypto->remove_crypter(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_AEAD:
+ lib->crypto->remove_aead(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_SIGNER:
+ lib->crypto->remove_signer(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_HASHER:
+ lib->crypto->remove_hasher(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_PRF:
+ lib->crypto->remove_prf(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_DH:
+ lib->crypto->remove_dh(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_RNG:
+ lib->crypto->remove_rng(lib->crypto, reg->arg.reg.f);
+ break;
+ case FEATURE_PRIVKEY:
+ case FEATURE_PRIVKEY_GEN:
+ lib->creds->remove_builder(lib->creds, reg->arg.reg.f);
+ break;
+ case FEATURE_PUBKEY:
+ lib->creds->remove_builder(lib->creds, reg->arg.reg.f);
+ break;
+ case FEATURE_CERT_DECODE:
+ case FEATURE_CERT_ENCODE:
+ lib->creds->remove_builder(lib->creds, reg->arg.reg.f);
+ break;
+ case FEATURE_DATABASE:
+ lib->db->remove_database(lib->db, reg->arg.reg.f);
+ break;
+ case FEATURE_FETCHER:
+ lib->fetcher->remove_fetcher(lib->fetcher, reg->arg.reg.f);
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
/**
* Check if dependencies are satisfied
*/
-static bool dependencies_satisfied(private_plugin_loader_t *this, char *name,
- bool soft, bool report, plugin_feature_t *features, int count)
+static bool dependencies_satisfied(private_plugin_loader_t *this,
+ plugin_entry_t *entry, bool soft, bool report,
+ plugin_feature_t *features, int count)
{
int i;
{
enumerator_t *entries, *loaded;
plugin_feature_t *feature;
- plugin_entry_t *entry;
+ plugin_entry_t *current;
bool found = FALSE;
if (features[i].kind != FEATURE_DEPENDS &&
break;
}
entries = this->plugins->create_enumerator(this->plugins);
- while (entries->enumerate(entries, &entry))
+ while (entries->enumerate(entries, ¤t))
{
- loaded = entry->loaded->create_enumerator(entry->loaded);
+ loaded = current->loaded->create_enumerator(current->loaded);
while (loaded->enumerate(loaded, &feature))
{
if (plugin_feature_matches(&features[i], feature))
{
if (report)
{
- char *provide, *depend;
+ char *provide, *depend, *name;
+ name = entry->plugin->get_name(entry->plugin);
provide = plugin_feature_get_string(&features[0]);
depend = plugin_feature_get_string(&features[i]);
DBG1(DBG_LIB, "feature %s in '%s' plugin has unsatisfied "
}
/**
- * Load a plugin feature
+ * Check if a given feature is still required as dependency
*/
-static bool load_feature(private_plugin_loader_t *this, plugin_entry_t *entry,
- char *name, plugin_feature_t *feature, plugin_feature_t *reg)
+static bool dependency_required(private_plugin_loader_t *this,
+ plugin_feature_t *dep)
{
- char *str;
+ enumerator_t *enumerator;
+ plugin_feature_t *features;
+ plugin_entry_t *entry;
+ int count, i;
- str = plugin_feature_get_string(feature);
- switch (feature->type)
- {
- case FEATURE_CRYPTER:
- case FEATURE_AEAD:
- case FEATURE_SIGNER:
- case FEATURE_HASHER:
- case FEATURE_PRF:
- case FEATURE_DH:
- case FEATURE_RNG:
- case FEATURE_PRIVKEY:
- case FEATURE_PRIVKEY_GEN:
- case FEATURE_PUBKEY:
- case FEATURE_CERT_DECODE:
- case FEATURE_CERT_ENCODE:
- case FEATURE_DATABASE:
- case FEATURE_FETCHER:
- /* require a registration function */
- if (!reg ||
- (reg->kind == FEATURE_REGISTER && reg->type != feature->type))
- {
- DBG1(DBG_LIB, "loading '%s' plugin feature %s failed: "
- "invalid registration function", name, str);
- free(str);
- return FALSE;
- }
- break;
- default:
- break;
- }
- if (reg && reg->kind == FEATURE_CALLBACK)
+ enumerator = this->plugins->create_enumerator(this->plugins);
+ while (enumerator->enumerate(enumerator, &entry))
{
- if (!reg->arg.cb.f(entry->plugin, feature, TRUE, reg->arg.cb.data))
- {
- DBG1(DBG_LIB, "loading '%s' plugin feature %s with callback failed",
- name, str);
- free(str);
- return FALSE;
+ if (!entry->plugin->get_features)
+ { /* features not supported */
+ continue;
}
- }
- else
- {
- switch (feature->type)
+ count = entry->plugin->get_features(entry->plugin, &features);
+ for (i = 0; i < count; i++)
{
- case FEATURE_CRYPTER:
- lib->crypto->add_crypter(lib->crypto, feature->arg.crypter.alg,
- name, reg->arg.reg.f);
- break;
- case FEATURE_AEAD:
- lib->crypto->add_aead(lib->crypto, feature->arg.aead.alg,
- name, reg->arg.reg.f);
- break;
- case FEATURE_SIGNER:
- lib->crypto->add_signer(lib->crypto, feature->arg.signer,
- name, reg->arg.reg.f);
- break;
- case FEATURE_HASHER:
- lib->crypto->add_hasher(lib->crypto, feature->arg.hasher,
- name, reg->arg.reg.f);
- break;
- case FEATURE_PRF:
- lib->crypto->add_prf(lib->crypto, feature->arg.prf,
- name, reg->arg.reg.f);
- break;
- case FEATURE_DH:
- lib->crypto->add_dh(lib->crypto, feature->arg.dh_group,
- name, reg->arg.reg.f);
- break;
- case FEATURE_RNG:
- lib->crypto->add_rng(lib->crypto, feature->arg.rng_quality,
- name, reg->arg.reg.f);
- break;
- case FEATURE_PRIVKEY:
- case FEATURE_PRIVKEY_GEN:
- lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY,
- feature->arg.privkey, reg->arg.reg.final,
- reg->arg.reg.f);
- break;
- case FEATURE_PUBKEY:
- lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY,
- feature->arg.pubkey, reg->arg.reg.final,
- reg->arg.reg.f);
- break;
- case FEATURE_CERT_DECODE:
- case FEATURE_CERT_ENCODE:
- lib->creds->add_builder(lib->creds, CRED_CERTIFICATE,
- feature->arg.cert, reg->arg.reg.final,
- reg->arg.reg.f);
- break;
- case FEATURE_DATABASE:
- lib->db->add_database(lib->db, reg->arg.reg.f);
- break;
- case FEATURE_FETCHER:
- lib->fetcher->add_fetcher(lib->fetcher, reg->arg.reg.f,
- feature->arg.fetcher);
- break;
- default:
- break;
+ if (feature_loaded(this, entry, &features[i]))
+ {
+ while (++i < count && (features[i].kind == FEATURE_DEPENDS ||
+ features[i].kind == FEATURE_SDEPEND))
+ {
+ if (plugin_feature_matches(&features[i], dep))
+ {
+ enumerator->destroy(enumerator);
+ return TRUE;
+ }
+ }
+ }
}
}
- DBG2(DBG_LIB, "loaded '%s' plugin feature %s", name, str);
- free(str);
- entry->loaded->insert_last(entry->loaded, feature);
- return TRUE;
+ enumerator->destroy(enumerator);
+ return FALSE;
}
/**
static int load_features(private_plugin_loader_t *this, bool soft, bool report)
{
enumerator_t *enumerator;
- plugin_feature_t *features, *reg = NULL;
+ plugin_feature_t *feature, *reg = NULL;
plugin_entry_t *entry;
int count, i, loaded = 0;
- char *name;
enumerator = this->plugins->create_enumerator(this->plugins);
while (enumerator->enumerate(enumerator, &entry))
{ /* feature interface not supported */
continue;
}
- name = entry->plugin->get_name(entry->plugin);
- count = entry->plugin->get_features(entry->plugin, &features);
+ count = entry->plugin->get_features(entry->plugin, &feature);
for (i = 0; i < count; i++)
{
- switch (features[i].kind)
+ switch (feature->kind)
{
case FEATURE_PROVIDE:
- if (!feature_loaded(this, entry, &features[i]) &&
- dependencies_satisfied(this, name, soft, report,
- &features[i], count - i) &&
- load_feature(this, entry, name, &features[i], reg))
+ if (!feature_loaded(this, entry, feature) &&
+ dependencies_satisfied(this, entry, soft, report,
+ feature, count - i) &&
+ plugin_feature_load(entry->plugin, feature, reg))
{
+ entry->loaded->insert_last(entry->loaded, feature);
loaded++;
}
break;
case FEATURE_REGISTER:
case FEATURE_CALLBACK:
- reg = &features[i];
+ reg = feature;
break;
default:
break;
}
+ feature++;
}
}
enumerator->destroy(enumerator);
return loaded;
}
+/**
+ * Try to unload plugin features on which is not depended anymore
+ */
+static int unload_features(private_plugin_loader_t *this, plugin_entry_t *entry)
+{
+ plugin_feature_t *feature, *reg = NULL;
+ int count, i, unloaded = 0;
+
+ count = entry->plugin->get_features(entry->plugin, &feature);
+ for (i = 0; i < count; i++)
+ {
+ switch (feature->kind)
+ {
+ case FEATURE_PROVIDE:
+ if (feature_loaded(this, entry, feature) &&
+ !dependency_required(this, feature) &&
+ plugin_feature_unload(entry->plugin, feature, reg))
+ {
+ entry->loaded->remove(entry->loaded, feature, NULL);
+ unloaded++;
+ }
+ break;
+ case FEATURE_REGISTER:
+ case FEATURE_CALLBACK:
+ reg = feature;
+ break;
+ default:
+ break;
+ }
+ feature++;
+ }
+ return unloaded;
+}
+
/**
* Remove plugins that we were not able to load any features from.
*/
METHOD(plugin_loader_t, unload, void,
private_plugin_loader_t *this)
{
+ enumerator_t *enumerator;
plugin_entry_t *entry;
+ linked_list_t *list;
- /* unload plugins in reverse order */
- while (this->plugins->remove_last(this->plugins,
- (void**)&entry) == SUCCESS)
+ /* unload plugins in reverse order, for those not supporting features */
+ list = linked_list_create();
+ while (this->plugins->remove_last(this->plugins, (void**)&entry) == SUCCESS)
{
- if (lib->leak_detective)
- { /* keep handle to report leaks properly */
- entry->handle = NULL;
+ list->insert_last(list, entry);
+ }
+ while (list->remove_last(list, (void**)&entry) == SUCCESS)
+ {
+ this->plugins->insert_first(this->plugins, entry);
+ }
+ while (this->plugins->get_count(this->plugins))
+ {
+ enumerator = this->plugins->create_enumerator(this->plugins);
+ while (enumerator->enumerate(enumerator, &entry))
+ {
+ if (entry->plugin->get_features)
+ { /* supports features */
+ while (unload_features(this, entry));
+ }
+ if (entry->loaded->get_count(entry->loaded) == 0)
+ {
+ if (lib->leak_detective)
+ { /* keep handle to report leaks properly */
+ entry->handle = NULL;
+ }
+ this->plugins->remove_at(this->plugins, enumerator);
+ plugin_entry_destroy(entry);
+ }
}
- plugin_entry_destroy(entry);
+ enumerator->destroy(enumerator);
}
}