set -e
#set -x
+PN_="`basename $0`"
OPT_DEL_='false'
OPT_USER_=''
OPT_GROUP_=''
OPT_BRIDGE_=''
-while getopts "du:g:b:h" opt; do
- case "$opt" in
- d) OPT_DEL_='true' ;;
- u) OPT_USER_="$OPTARG" ;;
- g) OPT_GROUP_="$OPTARG" ;;
- b) OPT_BRIDGE_="$OPTARG" ;;
- h) printUsage; exit 0 ;;
- ?) printUsage; exit 1 ;;
- esac
-done
-shift $(($OPTIND - 1))
+function printUsage()
+{
+ cat <<EOT
+Usage: "$PN_" [OPTIONS] <tun0> <tun1> ...
+
+$PN_ creates persistent tun/tap devices and optionally add them to a bridge
+
+OPTIONS:
+ -d delete the given tun devices and remove them from the bridge if given
+ -u <user> this user should be able to use the tun device
+ -g <group> this group should be able to use the tun device
+ -b <bridge> if given, all tun/tap devices are added/removed from the bridge
+ bridge is created if not allready existent
+ -h this help
+EOT
+}
function fromCmdline()
{
if [[ $OPT_GROUP_ != '' ]]; then args_="$args_ -u $OPT_GROUP_"; fi
tunctl -t "$1" $args_
if [[ $OPT_BRIDGE_ != '' ]]; then
+ brctl showmacs "$OPT_BRIDGE_" &>/dev/null || brctl addbr "$OPT_BRIDGE_"
brctl addif "$OPT_BRIDGE_" "$1"
fi
}
tunctl -d "$1"
}
+
+##
+# MAIN
+##
+
+while getopts "du:g:b:h" opt; do
+ case "$opt" in
+ d) OPT_DEL_='true' ;;
+ u) OPT_USER_="$OPTARG" ;;
+ g) OPT_GROUP_="$OPTARG" ;;
+ b) OPT_BRIDGE_="$OPTARG" ;;
+ h) printUsage; exit 0 ;;
+ ?) printUsage; exit 1 ;;
+ esac
+done
+shift $(($OPTIND - 1))
+
if [[ $OPT_DEL_ == 'false' ]]; then
+ if [[ $OPT_BRIDGE_ != '' ]]; then
+ brctl showmacs "$OPT_BRIDGE_" &>/dev/null || brctl addbr "$OPT_BRIDGE_"
+ fi
fromCmdline "createTun" "$@"
else
fromCmdline "trashTun" "$@"
+ if [[ $OPT_BRIDGE_ != '' ]]; then
+ brctl showmacs "$OPT_BRIDGE_" &>/dev/null && brctl delbr "$OPT_BRIDGE_"
+ fi
fi
# vim: filetype=sh