event handler implemented and refactoring

- extension_update_event handler implemented
- TALER_AgeMask moved to taler_extensions.h

src/exchange/taler-exchange-httpd_extensions.c

@@ -33,7 +33,6 @@
  */
 static struct GNUNET_DB_EventHandler *extensions_eh;
 
-
 /**
  * Function called whenever another exchange process has updated
  * the extensions data in the database.
@@ -48,24 +47,65 @@ extension_update_event_cb (void *cls,
                            size_t extra_size)
 {
   (void) cls;
-  (void) extra;
+  enum TALER_Extension_Type type;
-  (void) extra_size;
+
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Received /management/extensions update event\n");
+              "Received extensions update event\n");
+
+  if (sizeof(enum TALER_Extension_Type) != extra_size)
+  {
+    GNUNET_break (0);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Oops, incorrect size of extra for TALER_Extension_type\n");
+    return;
+  }
+
+  type = *(enum TALER_Extension_Type *) extra;
+  if (type <0 || type >= TALER_Extension_Max)
+  {
+    GNUNET_break (0);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Oops, incorrect type for TALER_Extension_type\n");
+    return;
+  }
+
+  {
+    char *config;
+    enum GNUNET_DB_QueryStatus qs;
+
+    qs = TEH_plugin->get_extension_config (TEH_plugin->cls,
+                                           TEH_extensions[type].name,
+                                           &config);
+
+    if (qs < 0)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Couldn't get extension config\n");
+      return;
+    }
+
+    /*
+     * TODO:
+     * - parse string as json
+     * - update global config
+     */
+
+  }
+
 }
 
 
 enum GNUNET_GenericReturnValue
 TEH_extensions_init ()
 {
-  struct GNUNET_DB_EventHeaderP es = {
+  struct GNUNET_DB_EventHeaderP ev = {
-    .size = htons (sizeof (es)),
+    .size = htons (sizeof (ev)),
     .type = htons (TALER_DBEVENT_EXCHANGE_EXTENSIONS_UPDATED),
   };
 
   extensions_eh = TEH_plugin->event_listen (TEH_plugin->cls,
                                             GNUNET_TIME_UNIT_FOREVER_REL,
-                                            &es,
+                                            &ev,
                                             &extension_update_event_cb,
                                             NULL);
   if (NULL == extensions_eh)
@@ -89,22 +129,4 @@ TEH_extensions_done ()
 }
 
 
-void
-TEH_extensions_update_state (void)
-{
-  /* TODO */
-#if 0
-  struct GNUNET_DB_EventHeaderP es = {
-    .size = htons (sizeof (es)),
-    .type = htons (TALER_DBEVENT_EXCHANGE_WIRE_UPDATED),
-  };
-
-  TEH_plugin->event_notify (TEH_plugin->cls,
-                            &es,
-                            NULL,
-                            0);
-#endif
-}
-
-
 /* end of taler-exchange-httpd_extensions.c */

src/exchange/taler-exchange-httpd_extensions.h

@@ -40,12 +40,4 @@ TEH_extensions_init (void);
 void
 TEH_extensions_done (void);
 
-/**
- * Something changed in the database. Rebuild the extension state metadata.
- * This function should be called if the exchange learns about a new signature
- * from our master key.
- */
-void
-TEH_extensions_update_state (void);
-
 #endif

src/exchange/taler-exchange-httpd_management_extensions.c

@@ -29,6 +29,7 @@
 #include "taler-exchange-httpd_management.h"
 #include "taler-exchange-httpd_responses.h"
 #include "taler_extensions.h"
+#include "taler_dbevents.h"
 
 
 struct Extension
@@ -95,7 +96,7 @@ set_extensions (void *cls,
                                              MHD_HTTP_INTERNAL_SERVER_ERROR,
                                              TALER_EC_GENERIC_JSON_INVALID,
                                              "convert configuration to string");
-      return GNUNET_DB_STATUS_SOFT_ERROR; /* FIXME: right error? */
+      return GNUNET_DB_STATUS_HARD_ERROR;
     }
 
     qs = TEH_plugin->set_extension_config (
@@ -115,6 +116,19 @@ set_extensions (void *cls,
                                              "save extension configuration");
     }
 
+    /* success, trigger event */
+    {
+      enum TALER_Extension_Type *type = &sec->extensions[i].type;
+      struct GNUNET_DB_EventHeaderP ev = {
+        .size = htons (sizeof (ev)),
+        .type = htons (TALER_DBEVENT_EXCHANGE_EXTENSIONS_UPDATED)
+      };
+      TEH_plugin->event_notify (TEH_plugin->cls,
+                                &ev,
+                                type,
+                                sizeof(*type));
+    }
+
   }
 
   return GNUNET_DB_STATUS_SUCCESS_ONE_RESULT; /* only 'success', so >=0, matters here */

src/exchangedb/plugin_exchangedb_postgres.c

@@ -11415,7 +11415,8 @@ postgres_delete_shard_locks (void *cls)
 
 /**
  * Function called to save the configuration of an extension
- * (age-restriction, peer2peer, ...)
+ * (age-restriction, peer2peer, ...).  After succesfull storage of the
+ * configuration it triggers the corresponding event.
  *
  * @param cls the @e cls of this struct with the plugin-specific state
  * @param extension_name the name of the extension

src/include/taler_crypto_lib.h

@@ -23,6 +23,7 @@
 #define TALER_CRYPTO_LIB_H
 
 #include <gnunet/gnunet_util_lib.h>
+#include "taler_extensions.h"
 #include "taler_error_codes.h"
 #include <gcrypt.h>
 
@@ -280,26 +281,6 @@ struct TALER_MasterSignatureP
   struct GNUNET_CRYPTO_EddsaSignature eddsa_signature;
 };
 
-/*
- * @brief Type of a list of age groups, represented as bit mask.
- *
- * The bits set in the mask mark the edges at the beginning of a next age
- * group.  F.e. for the age groups
- *     0-7, 8-9, 10-11, 12-14, 14-15, 16-17, 18-21, 21-*
- * the following bits are set:
- *
- *   31     24        16        8         0
- *   |      |         |         |         |
- *   oooooooo  oo1oo1o1  o1o1o1o1  ooooooo1
- *
- * A value of 0 means that the exchange does not support the extension for
- * age-restriction.
- */
-struct TALER_AgeMask
-{
-  uint32_t mask;
-};
-
 /**
  * @brief Age restriction commitment of a coin.
  */

src/include/taler_extensions.h

@@ -50,16 +50,30 @@ struct TALER_Extension
   void *config;
 };
 
-/*
- * TALER Peer2Peer Extension
- * FIXME oec
- */
-
-
 /*
  * TALER Age Restriction Extension
  */
 
+/*
+ * @brief Type of a list of age groups, represented as bit mask.
+ *
+ * The bits set in the mask mark the edges at the beginning of a next age
+ * group.  F.e. for the age groups
+ *     0-7, 8-9, 10-11, 12-14, 14-15, 16-17, 18-21, 21-*
+ * the following bits are set:
+ *
+ *   31     24        16        8         0
+ *   |      |         |         |         |
+ *   oooooooo  oo1oo1o1  o1o1o1o1  ooooooo1
+ *
+ * A value of 0 means that the exchange does not support the extension for
+ * age-restriction.
+ */
+struct TALER_AgeMask
+{
+  uint32_t mask;
+};
+
 #define TALER_EXTENSION_SECTION_AGE_RESTRICTION (TALER_EXTENSION_SECTION_PREFIX  \
                                                  "age_restriction")
 
@@ -90,4 +104,11 @@ TALER_parse_age_group_string (char *groups,
 enum TALER_Extension_ReturnValue
 TALER_get_age_mask (const struct GNUNET_CONFIGURATION_Handle *cfg,
                     struct TALER_AgeMask *mask);
+
+
+/*
+ * TALER Peer2Peer Extension
+ * TODO oec
+ */
+
 #endif