added decpcap test file

decpcap_test.cpp

@@ -0,0 +1,29 @@
+#include <iostream>
+
+extern "C" {
+	#include "decpcap.h"
+}
+
+int process_tcp (u_char * userdata, const dp_header * header, const u_char * m_packet) {
+	std::cout << "Callback for processing TCP packet called" << std::endl;
+}
+	
+
+int main (int argc, char ** argv)
+{
+	if (argc < 2)
+	{
+		std::cout << "Please, enter a filename" << std::endl;
+	}
+
+	char* errbuf = new char[DP_ERRBUFF_SIZE];
+
+	dp_handle * newhandle = dp_open_offline(argv[1], errbuf); 
+	dp_addcb (newhandle, dp_packet_tcp, process_tcp);
+	int ret = dp_dispatch (newhandle, -1, NULL, 0);
+	if (ret == -1)
+	{
+		std::cout << "Error dispatching: " << dp_geterr(newhandle);
+	}
+  
+}