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-rw-r--r--plugin.c215
1 files changed, 133 insertions, 82 deletions
diff --git a/plugin.c b/plugin.c
index 72cdbf7..0449293 100644
--- a/plugin.c
+++ b/plugin.c
@@ -176,13 +176,9 @@ dll_resolve_symbol (HMODULE module, void **dest, const char *symbol, const char
#endif
static void
-plugin_init_item (struct plugin *p,
- const struct plugin_option *o,
- struct openvpn_plugin_string_list **retlist,
- const char **envp)
+plugin_init_item (struct plugin *p, const struct plugin_option *o)
{
struct gc_arena gc = gc_new ();
- const char **argv = make_arg_array (o->so_pathname, o->args, &gc);
p->so_pathname = o->so_pathname;
p->plugin_type_mask = plugin_supported_types ();
@@ -210,9 +206,10 @@ plugin_init_item (struct plugin *p,
PLUGIN_SYM (func2, "openvpn_plugin_func_v2", 0);
PLUGIN_SYM (close, "openvpn_plugin_close_v1", PLUGIN_SYMBOL_REQUIRED);
PLUGIN_SYM (abort, "openvpn_plugin_abort_v1", 0);
- PLUGIN_SYM (min_version_required, "openvpn_plugin_min_version_required_v1", 0);
PLUGIN_SYM (client_constructor, "openvpn_plugin_client_constructor_v1", 0);
PLUGIN_SYM (client_destructor, "openvpn_plugin_client_destructor_v1", 0);
+ PLUGIN_SYM (min_version_required, "openvpn_plugin_min_version_required_v1", 0);
+ PLUGIN_SYM (initialization_point, "openvpn_plugin_select_initialization_point_v1", 0);
if (!p->open1 && !p->open2)
msg (M_FATAL, "PLUGIN: symbol openvpn_plugin_open_vX is undefined in plugin: %s", p->so_pathname);
@@ -220,9 +217,6 @@ plugin_init_item (struct plugin *p,
if (!p->func1 && !p->func2)
msg (M_FATAL, "PLUGIN: symbol openvpn_plugin_func_vX is undefined in plugin: %s", p->so_pathname);
- dmsg (D_PLUGIN_DEBUG, "PLUGIN_INIT: PRE");
- plugin_show_args_env (D_PLUGIN_DEBUG, argv, envp);
-
/*
* Verify that we are sufficiently up-to-date to handle the plugin
*/
@@ -236,36 +230,65 @@ plugin_init_item (struct plugin *p,
p->so_pathname);
}
+ if (p->initialization_point)
+ p->requested_initialization_point = (*p->initialization_point)();
+ else
+ p->requested_initialization_point = OPENVPN_PLUGIN_INIT_PRE_DAEMON;
+
+ p->initialized = true;
+
+ gc_free (&gc);
+}
+
+static void
+plugin_open_item (struct plugin *p,
+ const struct plugin_option *o,
+ struct openvpn_plugin_string_list **retlist,
+ const char **envp,
+ const int init_point)
+{
+ ASSERT (p->initialized);
+
+ /* clear return list */
if (retlist)
*retlist = NULL;
- /*
- * Call the plugin initialization
- */
- if (p->open2)
- p->plugin_handle = (*p->open2)(&p->plugin_type_mask, argv, envp, retlist);
- else if (p->open1)
- p->plugin_handle = (*p->open1)(&p->plugin_type_mask, argv, envp);
- else
- ASSERT (0);
+ if (!p->plugin_handle && init_point == p->requested_initialization_point)
+ {
+ struct gc_arena gc = gc_new ();
+ const char **argv = make_arg_array (o->so_pathname, o->args, &gc);
- msg (D_PLUGIN, "PLUGIN_INIT: POST %s '%s' intercepted=%s %s",
- p->so_pathname,
- o->args ? o->args : "[NULL]",
- plugin_mask_string (p->plugin_type_mask, &gc),
- (retlist && *retlist) ? "[RETLIST]" : "");
+ dmsg (D_PLUGIN_DEBUG, "PLUGIN_INIT: PRE");
+ plugin_show_args_env (D_PLUGIN_DEBUG, argv, envp);
- if ((p->plugin_type_mask | plugin_supported_types()) != plugin_supported_types())
- msg (M_FATAL, "PLUGIN_INIT: plugin %s expressed interest in unsupported plugin types: [want=0x%08x, have=0x%08x]",
- p->so_pathname,
- p->plugin_type_mask,
- plugin_supported_types());
+ /*
+ * Call the plugin initialization
+ */
+ if (p->open2)
+ p->plugin_handle = (*p->open2)(&p->plugin_type_mask, argv, envp, retlist);
+ else if (p->open1)
+ p->plugin_handle = (*p->open1)(&p->plugin_type_mask, argv, envp);
+ else
+ ASSERT (0);
- if (p->plugin_handle == NULL)
- msg (M_FATAL, "PLUGIN_INIT: plugin initialization function failed: %s",
- p->so_pathname);
+ msg (D_PLUGIN, "PLUGIN_INIT: POST %s '%s' intercepted=%s %s",
+ p->so_pathname,
+ o->args ? o->args : "[NULL]",
+ plugin_mask_string (p->plugin_type_mask, &gc),
+ (retlist && *retlist) ? "[RETLIST]" : "");
+
+ if ((p->plugin_type_mask | plugin_supported_types()) != plugin_supported_types())
+ msg (M_FATAL, "PLUGIN_INIT: plugin %s expressed interest in unsupported plugin types: [want=0x%08x, have=0x%08x]",
+ p->so_pathname,
+ p->plugin_type_mask,
+ plugin_supported_types());
+
+ if (p->plugin_handle == NULL)
+ msg (M_FATAL, "PLUGIN_INIT: plugin initialization function failed: %s",
+ p->so_pathname);
- gc_free (&gc);
+ gc_free (&gc);
+ }
}
static int
@@ -278,7 +301,11 @@ plugin_call_item (const struct plugin *p,
{
int status = OPENVPN_PLUGIN_FUNC_SUCCESS;
- if (p->plugin_type_mask & OPENVPN_PLUGIN_MASK (type))
+ /* clear return list */
+ if (retlist)
+ *retlist = NULL;
+
+ if (p->plugin_handle && (p->plugin_type_mask & OPENVPN_PLUGIN_MASK (type)))
{
struct gc_arena gc = gc_new ();
const char **argv = make_arg_array (p->so_pathname, args, &gc);
@@ -286,9 +313,6 @@ plugin_call_item (const struct plugin *p,
dmsg (D_PLUGIN_DEBUG, "PLUGIN_CALL: PRE type=%s", plugin_type_name (type));
plugin_show_args_env (D_PLUGIN_DEBUG, argv, envp);
- if (retlist)
- *retlist = NULL;
-
/*
* Call the plugin work function
*/
@@ -316,22 +340,28 @@ plugin_call_item (const struct plugin *p,
}
static void
-plugin_close_item (const struct plugin *p)
+plugin_close_item (struct plugin *p)
{
- msg (D_PLUGIN, "PLUGIN_CLOSE: %s", p->so_pathname);
+ if (p->initialized)
+ {
+ msg (D_PLUGIN, "PLUGIN_CLOSE: %s", p->so_pathname);
- /*
- * Call the plugin close function
- */
- (*p->close)(p->plugin_handle);
+ /*
+ * Call the plugin close function
+ */
+ if (p->plugin_handle)
+ (*p->close)(p->plugin_handle);
#if defined(USE_LIBDL)
- if (dlclose (p->handle))
- msg (M_WARN, "PLUGIN_CLOSE: dlclose() failed on plugin: %s", p->so_pathname);
+ if (dlclose (p->handle))
+ msg (M_WARN, "PLUGIN_CLOSE: dlclose() failed on plugin: %s", p->so_pathname);
#elif defined(USE_LOAD_LIBRARY)
- if (!FreeLibrary (p->module))
- msg (M_WARN, "PLUGIN_CLOSE: FreeLibrary() failed on plugin: %s", p->so_pathname);
+ if (!FreeLibrary (p->module))
+ msg (M_WARN, "PLUGIN_CLOSE: FreeLibrary() failed on plugin: %s", p->so_pathname);
#endif
+
+ p->initialized = false;
+ }
}
static void
@@ -345,7 +375,9 @@ plugin_abort_item (const struct plugin *p)
}
static void
-plugin_per_client_init (const struct plugin_common *pc, struct plugin_per_client *cli)
+plugin_per_client_init (const struct plugin_common *pc,
+ struct plugin_per_client *cli,
+ const int init_point)
{
const int n = pc->n;
int i;
@@ -354,31 +386,28 @@ plugin_per_client_init (const struct plugin_common *pc, struct plugin_per_client
for (i = 0; i < n; ++i)
{
const struct plugin *p = &pc->plugins[i];
-
- if (p->client_constructor)
+ if (p->plugin_handle
+ && (init_point < 0 || init_point == p->requested_initialization_point)
+ && p->client_constructor)
cli->per_client_context[i] = (*p->client_constructor)(p->plugin_handle);
}
- cli->initialized = true;
}
static void
plugin_per_client_destroy (const struct plugin_common *pc, struct plugin_per_client *cli)
{
- if (cli->initialized)
- {
- const int n = pc->n;
- int i;
+ const int n = pc->n;
+ int i;
- for (i = 0; i < n; ++i)
- {
- const struct plugin *p = &pc->plugins[i];
- void *cc = cli->per_client_context[i];
+ for (i = 0; i < n; ++i)
+ {
+ const struct plugin *p = &pc->plugins[i];
+ void *cc = cli->per_client_context[i];
- if (p->client_destructor && cc)
- (*p->client_destructor)(p->plugin_handle, cc);
- }
- CLEAR (*cli);
+ if (p->client_destructor && cc)
+ (*p->client_destructor)(p->plugin_handle, cc);
}
+ CLEAR (*cli);
}
struct plugin_list *
@@ -388,42 +417,58 @@ plugin_list_inherit (const struct plugin_list *src)
ALLOC_OBJ_CLEAR (pl, struct plugin_list);
pl->common = src->common;
ASSERT (pl->common);
- plugin_per_client_init (pl->common, &pl->per_client);
+ plugin_per_client_init (pl->common, &pl->per_client, -1);
return pl;
}
static struct plugin_common *
-plugin_common_open (const struct plugin_option_list *list,
- struct plugin_return *pr,
- const struct env_set *es)
+plugin_common_init (const struct plugin_option_list *list)
{
- struct gc_arena gc = gc_new ();
int i;
struct plugin_common *pc;
- const char **envp;
ALLOC_OBJ_CLEAR (pc, struct plugin_common);
+ for (i = 0; i < list->n; ++i)
+ {
+ plugin_init_item (&pc->plugins[i],
+ &list->plugins[i]);
+ pc->n = i + 1;
+ }
+
+ static_plugin_common = pc;
+ return pc;
+}
+
+static void
+plugin_common_open (struct plugin_common *pc,
+ const struct plugin_option_list *list,
+ struct plugin_return *pr,
+ const struct env_set *es,
+ const int init_point)
+{
+ struct gc_arena gc = gc_new ();
+ int i;
+ const char **envp;
+
envp = make_env_array (es, &gc);
if (pr)
plugin_return_init (pr);
- for (i = 0; i < list->n; ++i)
+ for (i = 0; i < pc->n; ++i)
{
- plugin_init_item (&pc->plugins[i],
+ plugin_open_item (&pc->plugins[i],
&list->plugins[i],
pr ? &pr->list[i] : NULL,
- envp);
- pc->n = i + 1;
+ envp,
+ init_point);
}
if (pr)
pr->n = i;
gc_free (&gc);
- static_plugin_common = pc;
- return pc;
}
static void
@@ -441,18 +486,26 @@ plugin_common_close (struct plugin_common *pc)
}
struct plugin_list *
-plugin_list_open (const struct plugin_option_list *list,
- struct plugin_return *pr,
- const struct env_set *es)
+plugin_list_init (const struct plugin_option_list *list)
{
struct plugin_list *pl;
ALLOC_OBJ_CLEAR (pl, struct plugin_list);
- pl->common = plugin_common_open (list, pr, es);
+ pl->common = plugin_common_init (list);
pl->common_owned = true;
- plugin_per_client_init (pl->common, &pl->per_client);
return pl;
}
+void
+plugin_list_open (struct plugin_list *pl,
+ const struct plugin_option_list *list,
+ struct plugin_return *pr,
+ const struct env_set *es,
+ const int init_point)
+{
+ plugin_common_open (pl->common, list, pr, es, init_point);
+ plugin_per_client_init (pl->common, &pl->per_client, init_point);
+}
+
int
plugin_call (const struct plugin_list *pl,
const int type,
@@ -479,8 +532,7 @@ plugin_call (const struct plugin_list *pl,
for (i = 0; i < n; ++i)
{
if (!plugin_call_item (&pl->common->plugins[i],
- pl->per_client.initialized
- ? pl->per_client.per_client_context[i] : NULL,
+ pl->per_client.per_client_context[i],
type,
args,
pr ? &pr->list[i] : NULL,
@@ -508,7 +560,6 @@ plugin_list_close (struct plugin_list *pl)
{
if (pl)
{
-
if (pl->common)
{
plugin_per_client_destroy (pl->common, &pl->per_client);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 04:16:15 +0000