Perform a scan even if there are missing plugins.

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 - Improve handling of invalid or existent ids of nvt's preference id. [#416](https://github.com/greenbone/openvas/pull/416)
+- Perform a scan even if there are missing plugins. [#439](https://github.com/greenbone/openvas/pull/439)
 
 ### Fixed
 - Do not store in memory an empty file received as nvt preference. [#409](https://github.com/greenbone/openvas/pull/409)

src/attack.c

@@ -1074,15 +1074,32 @@ attack_network (struct scan_globals *globals, kb_t *network_kb)
     }
 
   /* Initialize the attack. */
+  int plugins_init_error = 0;
   sched = plugins_scheduler_init (prefs_get ("plugin_set"),
                                   prefs_get_bool ("auto_enable_dependencies"),
-                                  network_phase);
+                                  network_phase, &plugins_init_error);
   if (!sched)
     {
       g_message ("Couldn't initialize the plugin scheduler");
       return;
     }
 
+  if (plugins_init_error > 0)
+    {
+      char buf[96];
+      int i = atoi (prefs_get ("ov_maindbid"));
+      kb_t main_kb = NULL;
+
+      sprintf (buf,
+               "%d errors were found during the plugin scheduling. "
+               "Some plugins have not been launched.",
+               plugins_init_error);
+
+      main_kb = kb_direct_conn (prefs_get ("db_address"), i);
+      error_message_to_client2 (main_kb, buf, NULL);
+      kb_lnk_reset (main_kb);
+    }
+
   max_hosts = get_max_hosts_number ();
   max_checks = get_max_checks_number ();
 

src/pluginscheduler.c

@@ -67,6 +67,12 @@ plugin_add (plugins_scheduler_t sched, GHashTable *oids_table,
 
   /* Check if the plugin is deprecated */
   nvti = nvticache_get_nvt (oid);
+  if (nvti == NULL)
+    {
+      g_warning ("The NVT with oid %s was not found in the nvticache.", oid);
+      return 1;
+    }
+
   if (nvti_tag (nvti)
       && (g_str_has_prefix (nvti_tag (nvti), "deprecated=1")
           || strstr (nvti_tag (nvti), "|deprecated=1")))
@@ -86,7 +92,7 @@ plugin_add (plugins_scheduler_t sched, GHashTable *oids_table,
   category = nvti_category (nvti);
   if (!(category >= ACT_INIT && category <= ACT_END))
     {
-      g_message ("The NVT with oid %s has no category assigned. This is "
+      g_warning ("The NVT with oid %s has no category assigned. This is "
                  "considered a fatal error, since the NVTI Cache "
                  "structure stored in Redis is out dated or corrupted.",
                  oid);
@@ -198,15 +204,16 @@ plugins_scheduler_fill_deps (plugins_scheduler_t sched, GHashTable *oids_table)
  * param[in]    sched       Plugins scheduler.
  * param[in]    oid_list    List of plugins to enable.
  * param[in]    autoload    Whether to autoload dependencies.
+ *
+ * return       error_counter Number of errors found during the schecuduling.
  */
 static int
 plugins_scheduler_enable (plugins_scheduler_t sched, const char *oid_list,
                           int autoload)
 {
   char *oids, *oid, *saveptr;
   GHashTable *oids_table, *names_table;
-  int ret = 0;
-  static int error_counter = 0;
+  int error_counter = 0;
 
   oids_table = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL);
   names_table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
@@ -216,28 +223,24 @@ plugins_scheduler_enable (plugins_scheduler_t sched, const char *oid_list,
   oid = strtok_r (oids, ";", &saveptr);
   while (oid)
     {
-      ret = plugin_add (sched, oids_table, names_table, autoload, oid);
-      if (ret)
-        {
-          error_counter++;
-          if (error_counter >= 5)
-            {
-              g_message ("Stopped plugin scheduler: High number of errors.");
-              goto error;
-            }
-        }
+      error_counter +=
+        plugin_add (sched, oids_table, names_table, autoload, oid);
       oid = strtok_r (NULL, ";", &saveptr);
     }
 
   /* When autoload is disabled, each plugin's deps list is still empty. */
   if (!autoload)
     plugins_scheduler_fill_deps (sched, oids_table);
 
-error:
+  if (error_counter > 0)
+    g_warning ("%s: %d errors were found during the plugin scheduling.",
+               __func__, error_counter);
+
   g_hash_table_destroy (oids_table);
   g_hash_table_destroy (names_table);
   g_free (oids);
-  return ret;
+
+  return error_counter;
 }
 
 int
@@ -308,19 +311,14 @@ check_dependency_cycles (plugins_scheduler_t sched)
 
 plugins_scheduler_t
 plugins_scheduler_init (const char *plugins_list, int autoload,
-                        int only_network)
+                        int only_network, int *error)
 {
   plugins_scheduler_t ret;
-  int i, err = 0;
+  int i;
 
   /* Fill our lists */
   ret = g_malloc0 (sizeof (*ret));
-  err = plugins_scheduler_enable (ret, plugins_list, autoload);
-  if (err)
-    {
-      plugins_scheduler_free (ret);
-      return NULL;
-    }
+  *error = plugins_scheduler_enable (ret, plugins_list, autoload);
 
   if (only_network)
     {

src/pluginscheduler.h

@@ -49,7 +49,7 @@ typedef struct plugins_scheduler *plugins_scheduler_t;
 #define PLUG_RUNNING ((struct scheduler_plugin *) 0x02)
 
 plugins_scheduler_t
-plugins_scheduler_init (const char *, int, int);
+plugins_scheduler_init (const char *, int, int, int *);
 
 struct scheduler_plugin *plugins_scheduler_next (plugins_scheduler_t);