diff options
Diffstat (limited to 'core/modules/remote-access/data/opt/openslx/scripts/remoteaccess-launch_vnc_server')
| -rwxr-xr-x | core/modules/remote-access/data/opt/openslx/scripts/remoteaccess-launch_vnc_server | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/core/modules/remote-access/data/opt/openslx/scripts/remoteaccess-launch_vnc_server b/core/modules/remote-access/data/opt/openslx/scripts/remoteaccess-launch_vnc_server new file mode 100755 index 00000000..892bcf2a --- /dev/null +++ b/core/modules/remote-access/data/opt/openslx/scripts/remoteaccess-launch_vnc_server @@ -0,0 +1,152 @@ +#!/bin/bash + +t="/tmp/remote-access-$DISPLAY" +mkdir -p "$t" +modmap="$t/modmap.want" +tmpmap="$t/modmap.have" +( + sleep 1 + setxkbmap de + xmodmap -e "keycode 92 =" + xmodmap -e "keycode 187 =" + xmodmap -e "keycode 188 =" + xmodmap -e "keycode 26 = e E e E U20AC U20AC U20AC" + xmodmap -pke > "$modmap" +) & +. /opt/openslx/config +# TODO If we support multiple parallel sessions in the future, we need dedicated +# ports for each session for both, the VNC and the RPC port. +vnc_port="${SLX_REMOTE_VNC_PORT:-5900}" +if ! [ "$vnc_port" -gt 0 ] || ! [ "$vnc_port" -lt 65535 ]; then + vnc_port=5900 +fi +srchost="$SLX_REMOTE_HOST_ACCESS" +if [ -n "$srchost" ]; then + # IPTABLES + rule="/opt/openslx/iptables/rules.d/80-remote-access" + if ! [ -e "$rule" ]; then + ( + echo "#!/bin/sh" + echo "iptables -A INPUT -s "'"'"$srchost"'"'" -p tcp --dport $vnc_port -j ACCEPT" + echo "iptables -A INPUT -s "'"'"$srchost"'"'" -p tcp --dport 7551 -j ACCEPT" + echo "iptables -A INPUT -p tcp --dport $vnc_port -j DROP" + echo "iptables -A INPUT -p tcp --dport 7551 -j DROP" + ) > "$rule" + chmod +x "$rule" + fi +fi +#set -x +#exec &> /tmp/fooooooooooooo +# dd since busybox head doesn't know -c +passwd="$( < /dev/urandom tr -c -d 'a-zA-Z0-9#&/=()[]{}' | dd bs=8 count=1 status=none )" +printf "%s" "$passwd" > "$t/vnc-passwd" +[ "$SLX_REMOTE_VNC" = "x11vnc" ] && chmod 0600 "$t/vnc-passwd" +( + # Make a copy of xauth, so if the xserver restarts, we'll use the old one and fail to connect + if [ -n "$XAUTHORITY" ]; then + copy="$( mktemp )" + cat "$XAUTHORITY" > "$copy" + export XAUTHORITY="$copy" + trap 'exit 1' INT TERM + trap 'rm -f -- "$copy"' EXIT + fi + < "$t/vnc-passwd" tigervncpasswd -f > "$t/tigervnc-passwd" + fails=0 + while true; do + s="$( date +%s )" + x0vncserver -fg -SecurityTypes VncAuth,TLSvnc -rfbauth "$t/tigervnc-passwd" -rfbport "$vnc_port" -localhost no -Log "*:stdout:100" \ + -AlwaysShared=true -DisconnectClients=false -MaxConnectionTime=0 -MaxDisconnectionTime=0 -MaxIdleTime=0 + e="$( date +%s )" + d="$(( e - s ))" + if [ "$d" -gt 5 ]; then + fails=0 + else + fails="$(( fails + 1 ))" + [ "$fails" -gt 10 ] && break + [ "$fails" -gt 3 ] && usleep 333333 + fi + done +) &> "$t/x11vnc-log-$$" & +vncpid=$! +# Delay this a bit until x11vnc is ready, and since we might potentially have had a race +# with the ~poweron event, which would reset the password in the database. +( + if [ -n "$SLX_REMOTE_LOG" ]; then + url="${SLX_REMOTE_LOG//=clientlog/=remoteaccess}" + elif [ -n "$SLX_PVS_CONFIG_URL" ]; then + url="${SLX_PVS_CONFIG_URL//=roomplanner/=remoteaccess}" + else + url="http://${SLX_PXE_SERVER_IP}/slx-admin/api.php?do=remoteaccess" + fi + for _ in {1..20}; do + sleep 1 + [ -e "/etc/cron.d/usage_stats" ] && break + done + [ -d "/proc/${vncpid}" ] || exit 1 # Something is wrong, bail + curl -s -S -L --retry 4 --retry-connrefused --max-time 3 --retry-max-time 10 \ + --data-urlencode "password=$passwd" \ + --data-urlencode "vncport=$vnc_port" \ + "$url" > /dev/null +) & +gotone=false +vmvnc=false +idle=0 +stepcount=0 +# In case of stale entry +# TODO: This sucks anyways performance-wise for VMware, maybe remove? +iptables -t nat -D PREROUTING -p tcp --dport "$vnc_port" -j REDIRECT --to-ports 5901 +while [ -d "/proc/${vncpid}" ]; do + sleep 5 + if netstat -tn | awk 'BEGIN{ e=1 } { if ($4 ~ /:('"$vnc_port"'|5901)$/) e=0 } END{ exit e }'; then + gotone=true + idle=0 + else + idle=$(( idle + 1 )) + fi + if $gotone; then + # As soon as someone is connected, "blank" the screen by setting brightness to zero. + # This doesn't seem to affect the framebuffer, luckily + # Let's see how well this works in practice. :-( + if (( stepcount == 0 )); then + declare -a args + args=() + for o in $( xrandr | grep -E '^[A-Z0-9-]+ connected.*[0-9]+x[0-9]+' | awk '{print $1}' ); do + args+=( "--output" "$o" "--brightness" "0" ) + done + xrandr "${args[@]}" + fi + if (( stepcount++ > 3 )); then + stepcount=0 + fi + fi + if $gotone && [ "$idle" -gt 120 ]; then # 120 * 5 = 10 mins + kill "$vncpid" + break + fi + # In case we access vmplayer via x11vnc; vmplayer won't leave the keymap alone >:( + xmodmap -pke > "$tmpmap" + if ! cmp -s "$tmpmap" "$modmap"; then + echo "$( date ) Reloading modmap" >> "$t/reload-log" + xmodmap "$modmap" + fi + + # Check if we should redirect to vmware + if [ "$SLX_REMOTE_VNC" != 'x11vnc' ]; then + if netstat -tnl | awk 'BEGIN{ e=1 } { if ($4 ~ /:5901$/) e=0 } END{ exit e }'; then + #enable + if ! $vmvnc; then + killall x0vncserver + usleep 10000 + iptables -t nat -I PREROUTING 1 -p tcp --dport "$vnc_port" -j REDIRECT --to-ports 5901 + fi + vmvnc=true + else + # disable + if $vmvnc; then + iptables -t nat -D PREROUTING -p tcp --dport "$vnc_port" -j REDIRECT --to-ports 5901 + fi + vmvnc=false + fi + fi +done +systemctl restart lightdm |