polish device tester script

closes #22

README.md

@@ -1,6 +1,6 @@
 # MiracleCast - Wifi-Display/Miracast Implementation
 
-The MiracleCast project provides software to connect external monitors to your system via Wifi. It is compatible to the Wifi-Display specification also known as Miracast. MiracleCast implements the Display-Source as well as Display-Sink side.
+The MiracleCast project provides software to connect external monitors to your system via Wi-Fi. It is compatible to the Wifi-Display specification also known as Miracast. MiracleCast implements the Display-Source as well as Display-Sink side.
 
 The Display-Source side allows you to connect external displays to your system and stream local content to the device. A lot of effort is put into making this as easy as connecting external displays via HDMI.
 
@@ -22,6 +22,8 @@ The MiracleCast projects requires the following software to be installed:
 
  - **gstreamer**: MiracleCast relay on gstreamer to show cast its output. You can test if all needed is installed launching [res/test-viewer.sh](https://github.com/albfan/miraclecast/blob/master/res/test-viewer.sh)
 
+ - **P2P Wi-Fi device** Although widespread this days, there are some devices not compatible with [Wi-Fi Direct](http://en.wikipedia.org/wiki/Wi-Fi_Direct) (prior know as Wi-Fi P2P). Test yours with [res/test-wifi-capabilities.sh](https://github.com/albfan/miraclecast/blob/master/res/test_wifi-capabilities.sh)
+
  - copy the dbus policy **res/org.freedesktop.miracle.conf** to `/etc/dbus-1/system.d/`
 
 ## Install

res/miracle-utils.sh

@@ -0,0 +1,125 @@
+#http://lxr.linux.no/linux+v3.0/include/linux/if_arp.h#L67
+ARPHRD_LOOPBACK=772
+
+#
+# Find all interfaces except loopback one
+#
+function find_choosable_networknames {
+   for i in $( ls /sys/class/net )
+   do 
+      if [ $( cat /sys/class/net/$i/type ) != $ARPHRD_LOOPBACK ] 
+      then
+         echo $i
+      fi
+   done
+}
+
+#
+# find wireless interfaces
+#
+function find_wireless_network_interfaces {
+   for i in $( find_choosable_networknames )
+   do 
+      if [ -d /sys/class/net/$i/wireless ]
+      then
+         echo $i
+      fi
+   done
+}
+
+#
+# test if interface is connected
+#
+function is_interface_connected {
+   test x$( cat /sys/class/net/$1/carrier 2>/dev/null) = x1
+}
+
+#
+# find wireless connected interfaces
+#
+function find_wireless_connected_network_interfaces {
+   for i in $( find_wireless_network_interfaces )
+   do 
+      if is_interface_connected $i
+      then
+         echo $i
+      fi
+   done
+}
+
+#
+# find physical for interface if exists
+#
+function find_physical_for_network_interface {
+   PHY_INDEX=$(iw dev $1 info | grep wiphy | awk '{print $2}')
+   if [ -n $PHY_INDEX ]
+   then
+      echo phy$PHY_INDEX
+   fi
+}
+
+#
+# Check interface for P2P capabilities
+#
+function search_p2p_capabilities {
+   WI_DEVICE=$1
+   PHY_DEVICE=$(find_physical_for_network_interface $WI_DEVICE)
+
+   if iw phy $PHY_DEVICE info | grep -Pzo "(?s)Supported interface modes.*Supported commands" | grep "P2P" &> /dev/null
+   then
+      echo $WI_DEVICE supports P2P
+   else
+      echo Sorry, $WI_DEVICE do not support P2P
+      exit 1
+   fi
+}
+
+#
+# show wpa_supplicant command
+#
+function show_wpa_supplicant_process {
+   ps -ef | grep wpa_supplican[t] 
+}
+
+#
+# show wpa_supplicant command
+#
+function show_wpa_supplicant_command {
+   show_wpa_supplicant_process | awk '{print substr($0, index($0,$8))}'
+}
+
+#
+# find wpa_supplicant pid
+#
+function find_wpa_supplicant_pid {
+   show_wpa_supplicant_process | awk '{print $2}'
+}
+
+#
+# checking if distro is ubuntu
+#
+function check_ubuntu_distro {
+   cat /proc/version | grep -i ubuntu
+}
+
+#
+# ubuntu manager restarts automatically wpa_supplicant
+#
+function kill_ubuntu_network_manager {
+   if check_ubuntu_distro
+   then
+      echo stopping NetworkManager
+      sudo service NetworkManager stop
+   fi
+}
+
+#
+# start ubuntu manager
+#
+function start_ubuntu_network_manager {
+   if check_ubuntu_distro
+   then
+      echo starting NetworkManager
+      sudo service NetworkManager start
+   fi
+}

res/test-wifi-capabilities.sh

@@ -1,5 +1,45 @@
 #/bin/bash
 
-echo You must see P2P-Go and P2P-Client below this line for a valid miraclecast device:
+. miracle-utils.sh
+
+WIFI_NAMES=$(find_wireless_network_interfaces)
+WIFI_COUNT=$(echo "$WIFI_NAMES" | wc -l)
+
+if [ 0 = $WIFI_COUNT ]
+then
+   echo There is no wireless devices avaliable
+   exit 1
+elif [ 1 = $WIFI_COUNT ]
+then
+   WIFI_NAME="$WIFI_NAMES"
+elif [ 2 -ge $WIFI_COUNT ]
+then
+   echo Choose wireless device:
+   PS3="device: "
+   QUIT="exit"
+   select wi_name in $WIFI_NAMES $QUIT
+   do
+      case $wi_name
+      in
+      "$QUIT")
+         exit
+         ;;
+      "")
+         if [ "$REPLY" = $QUIT ]
+         then
+            exit
+         else
+            echo unknow $REPLY
+         fi
+         ;;
+      *)
+         WIFI_NAME=$wi_name
+         break
+         ;;
+      esac
+   done
+fi
+
+search_p2p_capabilities $WIFI_NAME
+
 
-iw list | grep -P "(?s)Supported interface.*Supported commands" | grep "P2P"