Upstream vwifi v7.0 (Raizo62/vwifi @ 4a9842e)

Unmodified upstream source from https://github.com/Raizo62/vwifi
Commit: 4a9842e "CMakeLists.txt : VERSION = 7.0"

Simulator of WiFi (802.11) interfaces to communicate between
several Virtual Machines via mac80211_hwsim + TCP relay.

License: Apache-2.0

tools/start-vwifi-client.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+FOLDER_VWIFI='/hosthome/vwifi'
+
+DEFAULT_PREFIX_MAC_ADDRESS='74:F8:F6'
+
+# -------------------
+
+cd "${FOLDER_VWIFI}"
+
+if (( $# == 0 ))
+then
+	NbrWifi=2
+else
+	NbrWifi="$1"
+fi
+
+if [ -e /sys/module/mac80211_hwsim ]
+then
+	OldNbrWifi=$(cat /sys/module/mac80211_hwsim/parameters/radios)
+	if (( NbrWifi != OldNbrWifi ))
+	then
+		modprobe -r mac80211_hwsim
+	fi
+fi
+
+modprobe mac80211_hwsim radios=0
+
+hexchars="0123456789ABCDEF"
+middle=$( for i in {1..4} ; do echo -n ${hexchars:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' )
+MAC_ADDRESS="${DEFAULT_PREFIX_MAC_ADDRESS}${middle}"
+
+./vwifi-add-interfaces "${NbrWifi}" "${MAC_ADDRESS}"
+
+if [ "$(tty)" = '/dev/ttyS0' ]
+then
+	# In Console Mode -> Tmux can be usefull
+	if [ -v TMUX ]
+	then
+		# Already in tmux
+		./vwifi-client
+	else
+		tmux new-session -s vwifi "bash --rcfile <(echo '. ~/.bashrc; ./vwifi-client')" ; detach &> /dev/null
+
+		tmux attach -t vwifi
+	fi
+else
+	./vwifi-client
+fi