1 files changed, 177 insertions, 0 deletions

diff --git a/src/json/json_gnsrecord.c b/src/json/json_gnsrecord.c
new file mode 100644
index 000000000..7bdf97f06
--- /dev/null
+++ b/src/json/json_gnsrecord.c
@@ -0,0 +1,177 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2009-2013 GNUnet e.V.
+
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file json/json_gnsrecord.c
+ * @brief JSON handling of GNS record data
+ * @author Philippe Buschmann
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_json_lib.h"
+
+#define GNUNET_JSON_GNSRECORD_VALUE "value"
+#define GNUNET_JSON_GNSRECORD_TYPE "type"
+#define GNUNET_JSON_GNSRECORD_EXPIRATION_TIME "expiration_time"
+#define GNUNET_JSON_GNSRECORD_FLAG "flag"
+#define GNUNET_JSON_GNSRECORD_LABEL "label"
+#define GNUNET_JSON_GNSRECORD_NEVER "never"
+
+
+/**
+ * Parse given JSON object to gns record
+ *
+ * @param cls closure, NULL
+ * @param root the json object representing data
+ * @param spec where to write the data
+ * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
+ */
+static int
+parse_gnsrecordobject (void *cls,
+                       json_t *root,
+                       struct GNUNET_JSON_Specification *spec)
+{
+  struct GNUNET_GNSRECORD_Data *gnsrecord_object;
+  struct GNUNET_TIME_Absolute abs_expiration_time;
+  int unpack_state=0;
+  const char *value;
+  const char *expiration_time;
+  const char *record_type;
+  const char *label;
+  int flag;
+  void *rdata = NULL;
+  size_t rdata_size;
+
+  GNUNET_assert(NULL != root);
+  if(!json_is_object(root))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Error json is not array nor object!\n");
+    return GNUNET_SYSERR;
+  }
+  //interpret single gns record
+  unpack_state = json_unpack(root,
+                             "{s:s, s:s, s:s, s?:i, s:s!}",
+                             GNUNET_JSON_GNSRECORD_VALUE, &value,
+                             GNUNET_JSON_GNSRECORD_TYPE, &record_type,
+                             GNUNET_JSON_GNSRECORD_EXPIRATION_TIME, &expiration_time,
+                             GNUNET_JSON_GNSRECORD_FLAG, &flag,
+                             GNUNET_JSON_GNSRECORD_LABEL, &label);
+  if (0 != unpack_state)
+  {
+    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+               "Error json object has a wrong format!\n");
+    return GNUNET_SYSERR;
+  }
+  gnsrecord_object = GNUNET_new (struct GNUNET_GNSRECORD_Data);
+  gnsrecord_object->record_type = GNUNET_GNSRECORD_typename_to_number(record_type);
+  if (UINT32_MAX == gnsrecord_object->record_type)
+  {
+    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,"Unsupported type\n");
+    GNUNET_free(gnsrecord_object);
+    return GNUNET_SYSERR;
+  }
+  if (GNUNET_OK
+      != GNUNET_GNSRECORD_string_to_value (gnsrecord_object->record_type,
+                                           value,
+                                           &rdata,
+                                           &rdata_size))
+  {
+    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,"Value invalid for record type\n");
+    GNUNET_free(gnsrecord_object);
+    return GNUNET_SYSERR;
+  }
+
+  gnsrecord_object->data = rdata;
+  gnsrecord_object->data_size = rdata_size;
+
+  if (0 == strcmp (expiration_time, GNUNET_JSON_GNSRECORD_NEVER))
+  {
+    gnsrecord_object->expiration_time = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us;
+  }
+  else if (GNUNET_OK
+      == GNUNET_STRINGS_fancy_time_to_absolute (expiration_time,
+                                                &abs_expiration_time))
+  {
+    gnsrecord_object->expiration_time = abs_expiration_time.abs_value_us;
+  }
+  else
+  {
+    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Expiration time invalid\n");
+    GNUNET_free_non_null(rdata);
+    GNUNET_free(gnsrecord_object);
+    return GNUNET_SYSERR;
+  }
+  // check if flag is a valid enum value
+  if ((GNUNET_GNSRECORD_RF_NONE != flag)
+      && (GNUNET_GNSRECORD_RF_PRIVATE != flag)
+      && (GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION != flag)
+      && (GNUNET_GNSRECORD_RF_SHADOW_RECORD) != flag)
+  {
+    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Flag invalid\n");
+    GNUNET_free_non_null(rdata);
+    GNUNET_free(gnsrecord_object);
+    return GNUNET_SYSERR;
+  }
+  gnsrecord_object->flags = (enum GNUNET_GNSRECORD_Flags)flag;
+  *(struct GNUNET_GNSRECORD_Data **) spec->ptr = gnsrecord_object;
+  return GNUNET_OK;
+}
+
+/**
+ * Cleanup data left from parsing RSA public key.
+ *
+ * @param cls closure, NULL
+ * @param[out] spec where to free the data
+ */
+static void
+clean_gnsrecordobject (void *cls, struct GNUNET_JSON_Specification *spec)
+{
+  struct GNUNET_GNSRECORD_Data **gnsrecord_object;
+  gnsrecord_object = (struct GNUNET_GNSRECORD_Data **) spec->ptr;
+  if (NULL != *gnsrecord_object)
+  {
+    if (NULL != (*gnsrecord_object)->data)
+      GNUNET_free((char*)(*gnsrecord_object)->data);
+
+    GNUNET_free(*gnsrecord_object);
+    *gnsrecord_object = NULL;
+  }
+}
+
+/**
+ * JSON Specification for GNS Records.
+ *
+ * @param gnsrecord_object struct of GNUNET_GNSRECORD_Data to fill
+ * @return JSON Specification
+ */
+struct GNUNET_JSON_Specification
+GNUNET_JSON_spec_gnsrecord_data (struct GNUNET_GNSRECORD_Data **gnsrecord_object)
+{
+  struct GNUNET_JSON_Specification ret = {
+    .parser = &parse_gnsrecordobject,
+    .cleaner = &clean_gnsrecordobject,
+    .cls = NULL,
+    .field = NULL,
+    .ptr = gnsrecord_object,
+    .ptr_size = 0,
+    .size_ptr = NULL
+  };
+  *gnsrecord_object = NULL;
+  return ret;
+}