diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 61f0858..d66de3d 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -54,7 +54,8 @@
     misc_utils/burst_source_impl.cc
     misc_utils/burst_sink_qa_impl.cc
     misc_utils/burst_source_qa_impl.cc
-    decryption/decryption_impl.cc )
+    misc_utils/message_source_impl.cc 
+    decryption/decryption_impl.cc)
 
 add_library(gnuradio-grgsm SHARED ${grgsm_sources})
 target_link_libraries(gnuradio-grgsm ${Boost_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES} ${VOLK_LIBRARIES} ${LIBOSMOCORE_LIBRARIES}
diff --git a/lib/misc_utils/message_source_impl.cc b/lib/misc_utils/message_source_impl.cc
new file mode 100644
index 0000000..de24968
--- /dev/null
+++ b/lib/misc_utils/message_source_impl.cc
@@ -0,0 +1,131 @@
+/* -*- c++ -*- */
+/* @file
+ * @author Roman Khassraf <rkhassraf@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gr-gsm; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/io_signature.h>
+#include "message_source_impl.h"
+#include "stdio.h"
+#include <grgsm/gsmtap.h>
+#include <grgsm/endian.h>
+#include <algorithm>
+
+#include <iostream>
+#include <string>
+#include <sstream>
+
+#define MSG_BYTE_LEN 39
+
+
+namespace gr {
+  namespace gsm {
+
+    message_source::sptr
+    message_source::make(const std::vector<std::string> &msg_data)
+    {
+      return gnuradio::get_initial_sptr
+        (new message_source_impl(msg_data));
+    }
+
+    /*
+     * The private constructor
+     */
+    message_source_impl::message_source_impl(const std::vector<std::string> &msg_data)
+      : gr::block("message_source",
+              gr::io_signature::make(0, 0, 0),
+              gr::io_signature::make(0, 0, 0)),
+              d_finished(false)
+    {
+        message_port_register_out(pmt::mp("msgs"));
+        set_msg_data(msg_data);
+    }
+
+    /*
+     * Our virtual destructor.
+     */
+    message_source_impl::~message_source_impl()
+    {
+        if (d_finished == false){
+            d_finished = true;
+        }
+    }
+
+    void message_source_impl::set_msg_data(const std::vector<std::string> &msg_data)
+    {
+        for (int i=0; i<msg_data.size(); i++)
+        {
+            std::istringstream iss(msg_data[i]);
+            std::vector<uint8_t> bytes;
+            unsigned int c;
+
+            while (iss >> std::hex >> c)
+            {
+                if (c < 256)
+                {
+                    bytes.push_back(c);
+                }
+            }
+
+            if (bytes.size() == MSG_BYTE_LEN)
+            {
+                d_msgs.push_back(bytes);
+            }
+        }
+    }
+
+    bool message_source_impl::start()
+    {
+        d_finished = false;
+        d_thread = boost::shared_ptr<gr::thread::thread>
+            (new gr::thread::thread(boost::bind(&message_source_impl::run, this)));
+        return block::start();
+    }
+
+    bool message_source_impl::stop()
+    {
+        d_finished = true;
+        d_thread->interrupt();
+        d_thread->join();
+        return block::stop();
+    }
+
+    bool message_source_impl::finished()
+    {
+        return d_finished;
+    }
+
+    void message_source_impl::run()
+    {
+        for (int i=0; i<d_msgs.size(); i++)
+        {
+            std::vector<uint8_t> current = d_msgs[i];
+            pmt::pmt_t blob_header_plus_burst = pmt::make_blob(&current[0], current.size());
+            pmt::pmt_t msg = pmt::cons(pmt::PMT_NIL, blob_header_plus_burst);
+            message_port_pub(pmt::mp("msgs"), msg);
+        }
+        post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::from_long(1)));
+    }
+  } /* namespace gsm */
+} /* namespace gr */
+
diff --git a/lib/misc_utils/message_source_impl.h b/lib/misc_utils/message_source_impl.h
new file mode 100644
index 0000000..22a210e
--- /dev/null
+++ b/lib/misc_utils/message_source_impl.h
@@ -0,0 +1,51 @@
+/* -*- c++ -*- */
+/* @file
+ * @author Roman Khassraf <rkhassraf@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gr-gsm; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef INCLUDED_GSM_MESSAGE_SOURCE_IMPL_H
+#define INCLUDED_GSM_MESSAGE_SOURCE_IMPL_H
+
+#include <grgsm/misc_utils/message_source.h>
+
+namespace gr {
+  namespace gsm {
+
+    class message_source_impl : public message_source
+    {
+     private:
+        boost::shared_ptr<gr::thread::thread> d_thread;
+        std::vector<std::vector<uint8_t> > d_msgs;
+        bool d_finished;
+        void run();
+     public:
+      message_source_impl(const std::vector<std::string> &msg_data);
+      ~message_source_impl();
+      virtual void set_msg_data(const std::vector<std::string> &msg_data);
+      bool start();
+      bool stop();
+      bool finished();
+    };
+
+  } // namespace grgsm
+} // namespace gr
+
+#endif /* INCLUDED_GSM_MESSAGE_SOURCE_IMPL_H */
+