1 files changed, 132 insertions, 0 deletions
diff --git a/src/stateless/cp/trex_api_class.h b/src/stateless/cp/trex_api_class.h
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+++ b/src/stateless/cp/trex_api_class.h
@@ -0,0 +1,132 @@
+/*
+ Itay Marom
+ Cisco Systems, Inc.
+*/
+
+/*
+Copyright (c) 2015-2015 Cisco Systems, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#ifndef __TREX_API_CLASS_H__
+#define __TREX_API_CLASS_H__
+
+#include <assert.h>
+
+#include "common/basic_utils.h"
+#include "trex_exception.h"
+
+/**
+ * API exception
+ * 
+ * @author imarom (03-Apr-16)
+ */
+class TrexAPIException : public TrexException {
+public:
+    TrexAPIException(const std::string &what) : TrexException(what) {
+    }
+};
+
+/**
+ * define an API class
+ * 
+ * @author imarom (03-Apr-16)
+ */
+class APIClass {
+public:
+
+    enum type_e {
+        API_CLASS_TYPE_CORE = 0,
+        API_CLASS_TYPE_MAX,
+
+        API_CLASS_TYPE_NO_API
+    };
+
+    static const char * type_to_name(type_e type) {
+        switch (type) {
+        case API_CLASS_TYPE_CORE:
+            return "core";
+        default:
+            assert(0);
+        }
+    }
+
+    APIClass() {
+        /* invalid */
+        m_type = API_CLASS_TYPE_MAX;
+    }
+
+    void init(type_e type, int major, int minor) {
+         m_type    = type;
+         m_major   = major;
+         m_minor   = minor;
+
+         unsigned int seed = time(NULL);
+         m_handler = utl_generate_random_str(seed, 8);
+    }
+
+    std::string ver(int major, int minor) {
+        std::stringstream ss;
+        ss << major << "." << minor;
+        return ss.str();
+    }
+
+    std::string get_server_ver() {
+        return ver(m_major, m_major);
+    }
+
+    std::string & verify_api(int major, int minor) {
+        std::stringstream ss;
+        ss << "API type '" << type_to_name(m_type) << "': ";
+
+        assert(m_type < API_CLASS_TYPE_MAX);
+
+        bool fail = false;
+
+        /* for now a simple major check */
+        if (major < m_major) {
+            ss << "server has a newer major API version";
+            fail = true;
+        }
+
+        if (major > m_major) {
+            ss << "server has an older major API version";
+            fail = true;
+        }
+
+        if (minor > m_minor) {
+            ss << "client revision API is newer than server";
+            fail = true;
+        }
+
+        if (fail) {
+            ss <<  " - server: '" << get_server_ver() << "', client: '" << ver(major, minor) << "'";
+            throw TrexAPIException(ss.str());
+        }
+
+        return get_api_handler();
+    }
+
+    std::string & get_api_handler() {
+        return m_handler;
+    }
+
+private:
+    type_e         m_type;
+    int            m_major;
+    int            m_minor;
+    std::string    m_handler;
+
+};
+
+#endif /* __TREX_API_CLASS_H__ */