Fixes #162 Updates README for better description of the startup process

Signed-off-by: Martin Melik Merkumians <melik-merkumians@acin.tuwien.ac.at>

README.md

@@ -44,48 +44,50 @@ are part of the development packages of Cygwin.
 If you want to run the unit tests you will also have to download CppUTest via
 https://github.com/cpputest/cpputest
 
-For the development itself we recommend the use of Eclipse with the CDT plugin 
-(http://www.eclipse.org).
+For configuring the project we recommend the use of a CMake GUI (e.g., the 
+cmake-gui package on Linux, or the Installer for Windows available at [CMake](https://cmake.org/))
 
-For configuring the project we recommend the use of a CMake GUI (e.g.,the 
-cmake-gui oackage on Linux)
-
-Compile for POSIX:
+Compile for Linux/POSIX:
 ----------------
-1. Directly in the shell:
-	1. Go into the bin/posix directory
-	2. For a standard configuration invoke setup_posix.sh, otherwise start
- cmake (GUI or shell application) and configure your project
-	3. Invoke make
-	4. For invoking opener type:
+1. Make sure all the needed tools are available (CMake, make, gcc, binutils)
+2. Change to the <OpENer main folder>/bin/posix
+3. For a standard configuration invoke ``setup_posix.sh``
+	1. Invoke the ``make`` command
+	2. Grant OpENer the right to use raw sockets via ``sudo setcap cap_net_raw+ep ./src/ports/POSIX/OpENer``
+	3. Invoking OpENer:
 
-		./src/ports/POSIX/OpENer interface
+		``./src/ports/POSIX/OpENer <interface_name>``
 
-		e.g. ./src/ports/POSIX/OpENer eth1
- 
-2. Within Eclipse
-	1. For a standard configuration invoke setup_posix.sh, otherwise start
- cmake (GUI or shell application) and configure your project
-	2. Import the project
-	3. Go to the bin/win32 folder in the make targets view
-	4. Choose all from the make targets
-	5. The resulting executable will be in the directory /bin/posix or the
-directoy you have choosen via CMake
-
-Compile for Windows XP/7/8:
----------------------------
+		e.g. ``./src/ports/POSIX/OpENer eth1``
+
+OpENer also now has a real-time capable POSIX startup via the OpENer_RT option, which requires that the used kernel has the full preemptive RT patches applied and activated.
+If you want to use OpENer_RT, instead of step 2, the  ``sudo setcap cap_net_raw,cap_ipc_lock,cap_sys_nice+ep ./src/ports/POSIX/OpENer
+`` has to be run to grant OpENEr ``CAP_SYS_NICE``, ``CAP_IPC_LOCK``, and the ``CAP_NET_RAW`` capabilities, needed for the RT mode
+
+Compile for Windows XP/7/8 via Visual Studio:
+---------------------------------------------
 1. Invoke setup_windows.bat or configure via CMake
-2. Open Visual Studio solution in bin/win32
-3. For invoking opener type in command line:
+2. Open Visual Studio solution OpENer.sln in bin/win32
+3. Compile OpENer by chosing ``Build All`` in Visual Studio
+4. For invoking OpENer type from the command line:
+	1. Change to <OpENer main folder>\bin\win32\src\ports\WIN32\
+	2. Depending if you chose the ``Debug`` or ``Release`` configuration in Visual Studio, your executable will either show up in the subfolder Debug or Release
+	3. Invoke OpENer via
+
+		``OpENer <interface_index>``
 
-		OpENer interface_index
+		e.g. ``OpENer 3``
 
-		e.g. OpENer 3
+In order to get the correct interface index enter the command ``route print`` in a command promt and search for the MAC address of your chosen network interface at the beginning of the output. The leftmost number is the corresponding interface index.
 		
+Compile for Windows XP/7/8 via Cygwin:
+--------------------------------------
+This should work like the procedure for Linux, with the exception, that RT mode will not work for Cygwin.
+
 Compile for MinGW on Windows 10
 -------------------------------
 1. Make sure 64 bit mingw is installed. (Test with gcc --version, should show x86_64-posix-seh-rev1)
-2. Make sure Cmake is installed. (Test with cmake --version, should be version 3.xx)
+2. Make sure CMake is installed. (Test with cmake --version, should be version 3.xx)
 3. Change to <opener install dir>/bin/mingw
 4. Run the command `setup_mingw.bat` in a dos command line. (Not a bash shell). If tracing is desired, 
 use the following (where the cmake parameter must be enclosed in quotes) or change the ./source/CMakeList.txt file.