diff --git a/include/token/cclass.h b/include/token/cclass.h
index cf1cf3d..f1c0d25 100644
--- a/include/token/cclass.h
+++ b/include/token/cclass.h
@@ -32,33 +32,33 @@
     extern const _CCLASS const __##_class; \
     struct _##_class
 
-#define ENDC(_class)    } * _class; \
-    extern const _CCLASS const __##_class;
-
 typedef void (* ctor)(void *, va_list *);
+typedef void (* clr)(void *);
 typedef void (* dtor)(void *);
 typedef void (* jCtor)(void *, struct json_object *);
 typedef void (* jTo)(void *, struct json_object **);
 
-
 typedef struct CCLASS {
     const int magic;
     size_t size;
     void (* __construct)(void * _this, va_list * params);
+    void (* __clear)(void * _this);
     void (* __destruct)(void * _this);
     void (* __jsonConst)(void * _this, struct json_object * json);
     void (* __toJson)(void * _this, struct json_object ** json);
 } * _CCLASS;
-#define CCLASS_PTR_SIZE     sizeof(struct CCLASS *)
-#define CCLASS_SIZE         sizeof(struct CCLASS)
+#define _CCLASS_SIZE    sizeof(_CCLASS)
+#define CCLASS_SIZE     sizeof(struct CCLASS)
 
 #define __construct(class)  static void __construct(class _this, va_list * params)
+#define __clear(class)      static void __clear(class _this)
 #define __destruct(class)   static void __destruct(class _this)
 #define __jsonConst(class)  static void __jsonConst(class _this, struct json_object * json)
 #define __toJson(class)     static void __toJson(class _this, struct json_object ** json)
 
 #define INIT_CCLASS(class) \
     __construct(class); \
+    __clear(class); \
     __destruct(class); \
     __jsonConst(class); \
     __toJson(class); \
@@ -66,6 +66,7 @@ typedef struct CCLASS {
         CCLASS_MAGIC, \
         sizeof(struct _##class), \
         (ctor)__construct, \
+        (clr)__clear, \
         (dtor)__destruct, \
         (jCtor)__jsonConst, \
         (jTo)__toJson \
@@ -73,6 +74,7 @@ typedef struct CCLASS {
 
 void * _new(const _CCLASS _class, ...);
 void * _newFromJson(const _CCLASS _class, struct json_object * json);
+void   clear(void * _object);
 void   delete(void * _object);
 void   toJson(void * _object, struct json_object ** json);
 int    isObject(void * _object);
diff --git a/include/token/dyntype.h b/include/token/dyntype.h
index c6e60f1..caa4f98 100644
--- a/include/token/dyntype.h
+++ b/include/token/dyntype.h
@@ -40,11 +40,10 @@ enum DYNTYPE_TYPES {
 CLASS(DYNTYPE) {
     const _CCLASS const class;
     enum DYNTYPE_TYPES type;
-    size_t size;
     union _data {
         unsigned char _boolean;
         int _int;
-        double _float;
+        double _double;
         char * _string;
         struct _DYNTYPE ** _array;
         DYNTYPE_HASH _hash;
@@ -53,6 +52,22 @@ CLASS(DYNTYPE) {
 
 #include "token/dyntype/hash.h"
 
+#define dyntype_newBoolean(value)   new(DYNTYPE, DYNTYPE_TYPE_BOOLEAN, value)
+#define dyntype_newInt(value)       new(DYNTYPE, DYNTYPE_TYPE_INT, value)
+#define dyntype_newDouble(value)    new(DYNTYPE, DYNTYPE_TYPE_DOUBLE, value)
+#define dyntype_newString(value)    new(DYNTYPE, DYNTYPE_TYPE_STRING, value)
+#define dyntype_newArray(value)     new(DYNTYPE, DYNTYPE_TYPE_ARRAY, value)
+#define dyntype_newHash(value)      new(DYNTYPE, DYNTYPE_TYPE_HASH, value)
+
+enum DYNTYPE_TYPES dyntype_getType(DYNTYPE _this);
+size_t             dyntype_getSize(DYNTYPE _this);
+unsigned char      dyntype_getBoolean(DYNTYPE _this);
+int                dyntype_getInt(DYNTYPE _this);
+double             dyntype_getDouble(DYNTYPE _this);
+char *             dyntype_getString(DYNTYPE _this);
+DYNTYPE *          dyntype_getArray(DYNTYPE _this);
+DYNTYPE_HASH       dyntype_getHash(DYNTYPE _this);
+
 #endif//__DYNTYPE_H__
 
 // vim: set et ts=4 sw=4:
diff --git a/src/cclass.c b/src/cclass.c
index 6d1713b..71c165c 100644
--- a/src/cclass.c
+++ b/src/cclass.c
@@ -23,6 +23,7 @@
 #include "token/cclass.h"
 
 #undef __construct
+#undef __clear
 #undef __destruct
 #undef __jsonConst
 #undef __toJson
@@ -61,6 +62,16 @@ _newFromJson(const _CCLASS _class, struct json_object * json)
     return object;
 }
 
+void
+clear(void * _object)
+{
+    const struct CCLASS ** class = _object;
+
+    if (_object && *class && (*class)->__clear) {
+        (*class)->__clear(_object);
+    }
+}
+
 void
 delete(void * _object)
 {
@@ -97,7 +108,7 @@ _instanceOf(const _CCLASS _class, void * _object)
 {
     const struct CCLASS ** class = _object;
 
-    return (_class == *class);
+    return (class && _class == *class);
 }
 
 // vim: set et ts=4 sw=4:
diff --git a/src/crypt.c b/src/crypt.c
index 3bde1ee..8483c38 100644
--- a/src/crypt.c
+++ b/src/crypt.c
@@ -56,6 +56,7 @@ __destruct(CRYPT)
 
 __jsonConst(CRYPT) {}
 __toJson(CRYPT) {}
+__clear(CRYPT) {}
 
 void *
 crypt_createIv(CRYPT _this)
diff --git a/src/dyntype.c b/src/dyntype.c
index 516fbe6..650722e 100644
--- a/src/dyntype.c
+++ b/src/dyntype.c
@@ -23,13 +23,22 @@
 #include "token/dyntype.h"
 #include "token/dyntype/hash.h"
 
+static
+size_t _dyntype_sizes[] = {
+    0,
+    sizeof(unsigned char),
+    sizeof(int),
+    sizeof(double),
+    sizeof(char *),
+    sizeof(DYNTYPE *),
+    sizeof(DYNTYPE_HASH)
+};
 
 INIT_CCLASS(DYNTYPE);
 
 __construct(DYNTYPE)
 {
     _this->type = va_arg(* params, enum DYNTYPE_TYPES);
-    _this->size = va_arg(* params, size_t);
 
     switch(_this->type) {
         case DYNTYPE_TYPE_INT:
@@ -37,8 +46,13 @@ __construct(DYNTYPE)
             break;
 
         case DYNTYPE_TYPE_STRING:
-            (_this->data)._string = calloc(_this->size + 1, sizeof(char));
-            memcpy((_this->data)._string, va_arg(* params, const char *), _this->size);
+            {
+                const char * string = va_arg(* params, const char *);
+                const size_t length = strlen(string);
+
+                (_this->data)._string = calloc(length + 1, sizeof(char));
+                memcpy((_this->data)._string, string, length);
+            }
             break;
 
         case DYNTYPE_TYPE_HASH:
@@ -55,35 +69,34 @@ __jsonConst(DYNTYPE)
     switch (json_object_get_type(json)) {
         case json_type_int:
             _this->type = DYNTYPE_TYPE_INT;
-            _this->size = sizeof(int);
             (_this->data)._int = (int)json_object_get_int(json);
             break;
 
         case json_type_string:
             {
                 const char * string = json_object_get_string(json);
+                const size_t length = strlen(string);
 
                 _this->type = DYNTYPE_TYPE_STRING;
-                _this->size = strlen(string);
-                (_this->data)._string = calloc(_this->size + 1, sizeof(char));
-                memcpy((_this->data)._string, string, _this->size);
+                (_this->data)._string = calloc(length + 1, sizeof(char));
+                memcpy((_this->data)._string, string, length);
                 // the json object handles the memory for string....
             }
             break;
 
         case json_type_object:
             _this->type = DYNTYPE_TYPE_HASH;
-            _this->size = sizeof(DYNTYPE_HASH);
             (_this->data)._hash = newFromJson(DYNTYPE_HASH, json);
             break;
 
         default:
             _this->type = DYNTYPE_TYPE_NULL;
-            _this->size = 0;
             (_this->data)._hash = NULL;
     }
 }
 
+__clear(DYNTYPE) {}
+
 __destruct(DYNTYPE)
 {
     if (_this) {
@@ -122,4 +135,53 @@ __toJson(DYNTYPE)
     }
 }
 
+enum DYNTYPE_TYPES
+dyntype_getType(DYNTYPE _this)
+{
+    return _this->type;
+}
+
+size_t
+dyntype_getSize(DYNTYPE _this)
+{
+    return _dyntype_sizes[_this->type];
+}
+
+unsigned char
+dyntype_getBoolean(DYNTYPE _this)
+{
+    return (_this->data)._boolean;
+}
+
+int
+dyntype_getInt(DYNTYPE _this)
+{
+    return (_this->data)._int;
+}
+
+double
+dyntype_getDouble(DYNTYPE _this)
+{
+    return (_this->data)._double;
+}
+
+char *
+dyntype_getString(DYNTYPE _this)
+{
+    return (_this->data)._string;
+}
+
+DYNTYPE *
+dyntype_getArray(DYNTYPE _this)
+{
+    return (_this->data)._array;
+}
+
+DYNTYPE_HASH
+dyntype_getHash(DYNTYPE _this)
+{
+    return (_this->data)._hash;
+}
+
+
 // vim: set et ts=4 sw=4:
diff --git a/src/dyntype/hash.c b/src/dyntype/hash.c
index 306098d..4a900e9 100644
--- a/src/dyntype/hash.c
+++ b/src/dyntype/hash.c
@@ -37,6 +37,7 @@ __construct(DYNTYPE_HASH)
     _this->used = 0;
     _updateHashSize(_this);
 }
+
 #undef __construct
 
 __jsonConst(DYNTYPE_HASH)
@@ -52,16 +53,22 @@ __jsonConst(DYNTYPE_HASH)
     }
 }
 
+__clear(DYNTYPE_HASH) {}
+
 __destruct(DYNTYPE_HASH)
 {
     size_t index;
 
     for (index = 0; index < _this->used; index ++) {
         free(_this->keys[index]);
+        delete(_this->values[index]);
     }
 
     free(_this->keys);
     free(_this->values);
+
+    _this->size = _this->used = 0;
+    _updateHashSize(_this);
 }
 
 __toJson(DYNTYPE_HASH)
diff --git a/src/packet.c b/src/packet.c
index 9a37ef9..ef7d1ab 100644
--- a/src/packet.c
+++ b/src/packet.c
@@ -24,7 +24,23 @@ INIT_CCLASS(PACKET);
 
 __construct(PACKET)
 {
-    packet_set_default_content(_this);
+    DYNTYPE header = va_arg(* params, DYNTYPE);
+    DYNTYPE data = NULL;
+
+    if (instanceOf(DYNTYPE, header)) {
+        data = va_arg(* params, DYNTYPE);
+    }
+
+    if (instanceOf(DYNTYPE, data)) {
+
+        packet_setHeader(_this, header);
+        packet_setData(_this, data);
+
+    } else {
+
+        packet_set_default_content(_this);
+
+    }
 }
 
 __jsonConst(PACKET)
@@ -49,7 +65,21 @@ __jsonConst(PACKET)
     packet_setData(_this, newFromJson(DYNTYPE, data));
 }
 
-__destruct(PACKET) {}
+__clear(PACKET) {}
+
+__destruct(PACKET)
+{
+    DYNTYPE header = packet_getHeader(_this);
+    DYNTYPE data   = packet_getData(_this);
+
+    if (NULL != header) {
+        delete(&header);
+    }
+
+    if (NULL != data) {
+        delete(&data);
+    }
+}
 
 __toJson(PACKET)
 {
diff --git a/tests/cclassTest.c b/tests/cclassTest.c
index ba27b2b..c31e1ca 100644
--- a/tests/cclassTest.c
+++ b/tests/cclassTest.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <sys/types.h>
 #include <json/json.h>
 
diff --git a/tests/cryptTest.c b/tests/cryptTest.c
index 5bc0622..6baf98e 100644
--- a/tests/cryptTest.c
+++ b/tests/cryptTest.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <mcrypt.h>
 #include <stdlib.h>
 #include <sys/types.h>
diff --git a/tests/mock/class.c b/tests/mock/class.c
index da28fd3..41c06e7 100644
--- a/tests/mock/class.c
+++ b/tests/mock/class.c
@@ -22,6 +22,8 @@ __jsonConst(MOCK_CLASS)
     _this->value = json_object_get_int(json);
 }
 
+__clear(MOCK_CLASS) {}
+
 __destruct(MOCK_CLASS)
 {
     _called = 1;
diff --git a/tests/packetTest.c b/tests/packetTest.c
index 4f6afe5..62a89de 100644
--- a/tests/packetTest.c
+++ b/tests/packetTest.c
@@ -1,3 +1,5 @@
+#include <stdio.h>
+
 #include "runtest.h"
 #include "token/cclass.h"
 #include "token/packet.h"
@@ -36,14 +38,59 @@ static
 int
 testDefaultInit()
 {
+    ASSERT_INSTANCE_OF(PACKET, packet);
     ASSERT_NULL(packet_getHeader(packet));
     ASSERT_NULL(packet_getData(packet));
 
     return TEST_OK;
 }
 
+static
+int
+testParamInit1()
+{
+    __tearDown();
+
+    DYNTYPE header = dyntype_newInt(123);
+    packet = new(PACKET, header, NULL);
+
+    ASSERT_INSTANCE_OF(PACKET, packet);
+    ASSERT_NULL(packet_getHeader(packet));
+    ASSERT_NULL(packet_getData(packet));
+
+    delete(&header);
+
+    return TEST_OK;
+}
+
+static
+int
+testParamInit2()
+{
+    DYNTYPE header, data;
+
+    __tearDown();
+
+    packet = new(PACKET, dyntype_newInt(123), dyntype_newInt(321));
+
+    ASSERT_INSTANCE_OF(PACKET, packet);
+
+    header = packet_getHeader(packet);
+    data   = packet_getData(packet);
+
+    ASSERT_INSTANCE_OF(DYNTYPE, header);
+    ASSERT_INSTANCE_OF(DYNTYPE, data);
+
+    ASSERT_EQUAL(123, dyntype_getInt(header));
+    ASSERT_EQUAL(321, dyntype_getInt(data));
+
+    return TEST_OK;
+}
+
 const testfunc tests[] = {
-    testDefaultInit
+    testDefaultInit,
+    testParamInit1,
+    testParamInit2
 };
 const size_t count = FUNCS_COUNT(tests);
 
diff --git a/tests/runtest.c b/tests/runtest.c
index 8d5dea4..69c10b0 100644
--- a/tests/runtest.c
+++ b/tests/runtest.c
@@ -24,7 +24,7 @@ isObjectNull(void * _object)
     const struct CCLASS ** class = _object;
 
     ASSERT_OBJECT(_object);
-    ASSERT_MEM_NULL(_object + CCLASS_PTR_SIZE, (*class)->size - CCLASS_PTR_SIZE);
+    ASSERT_MEM_NULL(_object + _CCLASS_SIZE, (*class)->size - _CCLASS_SIZE);
 
     return TEST_OK;
 }
diff --git a/tests/runtest.h b/tests/runtest.h
index 401f4b9..ce6689c 100644
--- a/tests/runtest.h
+++ b/tests/runtest.h
@@ -11,26 +11,68 @@ enum RESULT_TYPES {
     TEST_ERROR
 };
 
-#define ASSERT_NULL(value)          if (NULL != (value)) return TEST_FAILED
-#define ASSERT_NOT_NULL(value)      if (NULL == (value)) return TEST_FAILED
-#define ASSERT_EQUAL(val1,val2)     if ((val1) != (val2)) return TEST_FAILED
-#define ASSERT_NOT_EQUAL(val1,val2) if ((val1) == (val2)) return TEST_FAILED
+#define ASSERT_NULL(value) \
+    if (NULL != (value)) { \
+        printf("%s[%d]: Assertion failed that %s is NULL\n", \
+                __FILE__, __LINE__, #value); \
+        return TEST_FAILED; }
+
+#define ASSERT_NOT_NULL(value) \
+    if (NULL == (value)) { \
+        printf("%s[%d]: Assertion failed that %s is NOT NULL\n", \
+                __FILE__, __LINE__, #value); \
+        return TEST_FAILED; }
+
+#define ASSERT_EQUAL(val1,val2) \
+    if ((val1) != (val2)) { \
+        printf("%s[%d]: Assertion failed that %s equals %s\n", \
+                __FILE__, __LINE__, #val1, #val2); \
+        return TEST_FAILED; }
+
+#define ASSERT_NOT_EQUAL(val1,val2) \
+    if ((val1) == (val2)) { \
+        printf("%s[%d]: Assertion failed that %s not equals %2\n", \
+                __FILE__, __LINE__, #val1, #val2); \
+        return TEST_FAILED; }
+
 #define ASSERT_MEM_EQUAL(val1,val2,size) \
-    if(0 != memcmp((val1), (val2), (size))) return TEST_FAILED
+    if(0 != memcmp((val1), (val2), (size))) { \
+        printf("%s[%d]: Assertion failed that memory at %s equals %s for %lu bytes\n", \
+                __FILE__, __LINE__, #val1, #val2, size); \
+        return TEST_FAILED; }
+
 #define ASSERT_MEM_NOT_EQUAL(val1,val2,size) \
-    if(0 == memcmp((val1), (val2), (size))) return TEST_FAILED
-#define ASSERT_MEM_NULL(val, size)  if (! isMemNull((val), (size))) return TEST_FAILED
+    if(0 == memcmp((val1), (val2), (size))) { \
+        printf("%s[%d]: Assertion failed that memory at %s not equals %s for %lu bytes\n", \
+                __FILE__, __LINE__, #val1, #val2, size); \
+        return TEST_FAILED; }
+
+#define ASSERT_MEM_NULL(val, size) \
+    if (! isMemNull((val), (size))) { \
+        printf("%s[%d]: Assertion failed that memory at %s is NULL for %lu bytes\n", \
+                __FILE__, __LINE__, #val, size); \
+        return TEST_FAILED; }
+
 #define ASSERT_MEM_NOT_NULL(val, size) \
-    if (isMemNull((val), (size))) return TEST_FAILED
+    if (isMemNull((val), (size))) { \
+        printf("%s[%d]: Assertion failed that memory at %s is NOT NULL for %lu bytes\n", \
+                __FILE__, __LINE__, #val, size); \
+        return TEST_FAILED; }
+
 #define ASSERT_STRING_EQUAL(val1,val2) \
     if(0 != strcmp((val1), (val2))) return TEST_FAILED
 #define ASSERT_STRING_NOT_EQUAL(val1,val2) \
     if(0 == strcmp((val1), (val2))) return TEST_FAILED
+
 #define ASSERT_OBJECT(val)          if (! isObject((val))) return TEST_FAILED
 #define ASSERT_OBJECT_NULL(val)     if (! isObjectNull((val))) return TEST_FAILED
 #define ASSERT_OBJECT_NOT_NULL(val) if (isObjectNull((val))) return TEST_FAILED
+
 #define ASSERT_INSTANCE_OF(class, val) \
-    if (! instanceOf(class, val)) return TEST_FAILED
+    if (! instanceOf(class, val)) { \
+        printf("%s[%d]: Assertion failed that %s is instance of %s\n", \
+                __FILE__, __LINE__, #val, #class); \
+        return TEST_FAILED; }
 
 
 typedef int (* const testfunc)(void);