130 lines
4.7 KiB
Bash
130 lines
4.7 KiB
Bash
#!/bin/bash /usr/lib/turtle/turtle_module
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VERSION="0.6"
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DESCRIPTION="uPnP Port Forwarding"
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AUTHOR="Shad"
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CONF=/tmp/upnp_portfwd.form
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: ${DIALOG_OK=0}
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: ${DIALOG_CANCEL=1}
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: ${DIALOG_HELP=2}
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: ${DIALOG_EXTRA=3}
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: ${DIALOG_ITEM_HELP=4}
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: ${DIALOG_ESC=255}
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function configure {
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if [ -s /etc/config/upnp_portfwd ]
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then
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upnp_portfwd_lport=$(uci get upnp_portfwd.lport)
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upnp_portfwd_rport=$(uci get upnp_portfwd.rport)
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upnp_portfwd_proto=$(uci get upnp_portfwd.protocol)
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else
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touch /etc/config/upnp_portfwd
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fi
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dialog --ok-label "Submit" \
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--help-button \
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--title "uPnp Port Forwarding Configuration" \
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--form "Port Forward\n\n\
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Router Port: External port of router to be forwarded\n\
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Local Port: Port of service running in Turtle's WAN\n\
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Protocol: tcp or udp\n \n" 16 60 3\
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"Router Port:" 1 1 "$upnp_portfwd_rport" 1 14 48 0 \
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"Local Port:" 2 1 "$upnp_portfwd_lport" 2 14 48 0 \
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"Protocol:" 3 1 "$upnp_portfwd_proto" 3 14 48 0 \
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2>$CONF
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return=$?
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case $return in
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$DIALOG_OK)
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cat $CONF | {
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read -r upnp_portfwd_rport
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read -r upnp_portfwd_lport
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read -r upnp_portfwd_proto
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touch /etc/config/upnp_portfwd
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uci set upnp_portfwd.lport="$upnp_portfwd_lport"
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uci set upnp_portfwd.rport="$upnp_portfwd_rport"
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uci set upnp_portfwd.protocol="$upnp_portfwd_proto"
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uci commit upnp_portfwd
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rm $CONF
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};;
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$DIALOG_CANCEL)
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rm $CONF
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clear
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exit;;
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$DIALOG_HELP)
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dialog --title "Help" \
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--msgbox "\
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uPnP Portfwd is a service which provides automatic port forwarding when connected to some uPnP enabled routers.\nThis service is typically used to provide a
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convenient and persistent DIRECT shell from the outside into the LAN Turtle so that a remote "proxy" server or host is not needed.\n*IF* the router is uPnP enabled
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and forwards the port it would be possible to connect directly to the Turtle from any arbitrary/anonymous location, even from TOR.\n \n
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Remote Port - External port on the router to be forwarded to the Turtle.\n \n\
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Local Port - The port where a local service is running in the Turtle (Typically 22 -ssh-)\n \n\
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Protocol - TCP or UDP (tcp for ssh)\n \n\
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Example: Per the defaults, the router will forward its external port 45000 to the LAN Turtle port 22. In this scenario one may establish a direct connection to the
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LAN Turtle by ssh'ing into the router's external interface port 45000: ssh -p 45000 root@external.router.ip \n \n
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While this won't work in many cases, it may come handy when it does, which is frequent for some telco provided SOHO routers.\n \n\
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" 20 60
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configure
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;;
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$DIALOG_ESC)
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clear;;
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esac
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}
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function start {
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if [ ! -e "/etc/config/upnp_portfwd" ]; then
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touch /etc/config/upnp_portfwd
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uci set upnp_portfwd.lport="22"
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uci set upnp_portfwd.rport="45000"
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uci set upnp_portfwd.protocol="tcp"
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uci commit upnp_portfwd
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fi
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if [ ! -e "/usr/bin/upnpc" ]; then
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opkg update
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opkg install miniupnpc
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fi
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ETH1_IP="`ifconfig eth1 | grep "inet addr" | awk -F: '{ print $2; }' | awk '{ print $1; }'`"
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iptables -t filter -I INPUT 1 -i eth1 -j ACCEPT # Kludge to allow uPnP work - Maybe a more specific way to do it?
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upnpc -a $ETH1_IP $(uci get upnp_portfwd.lport) $(uci get upnp_portfwd.rport) $(uci get upnp_portfwd.protocol)
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iptables -I INPUT 1 -i eth1 -p $(uci get upnp_portfwd.protocol) --dport $(uci get upnp_portfwd.lport) -j ACCEPT
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FWDRULE="`upnpc -l | grep "$(uci get upnp_portfwd.rport)->" | tail -1`"
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if [ "$FWDRULE" == "" ]; then
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uci set upnp_portfwd.enabled="0"
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else
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uci set upnp_portfwd.enabled="1"
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fi
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uci commit upnp_portfwd
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iptables -t filter -D INPUT -i eth1 -j ACCEPT
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}
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function stop {
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iptables -t filter -I INPUT 1 -i eth1 -j ACCEPT
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upnpc -d $(uci get upnp_portfwd.rport) $(uci get upnp_portfwd.protocol)
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iptables -t filter -D INPUT -i eth1 -j ACCEPT
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iptables -D INPUT -i eth1 -p $(uci get upnp_portfwd.protocol) --dport $(uci get upnp_portfwd.lport) -j ACCEPT
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uci set upnp_portfwd.enabled="0"
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uci commit upnp_portfwd
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}
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function status {
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if [ "$(uci get upnp_portfwd.enabled 2>/dev/null)" == "1" ]; then
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echo "1"
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else
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echo "0"
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fi
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}
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