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#!/bin/sh

# Copyright (C) 2014 Deciso B.V.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

# PROVIDE: captiveportal
# REQUIRE: ipfw
# KEYWORD: shutdown

. /etc/rc.subr

name=captiveportal
rcvar=captiveportal_enable
start_precmd=captiveportal_prestart
start_cmd="${name}_start"
stop_cmd="${name}_stop"

[ -z "$captiveportal_enable" ]       && captiveportal_enable="NO"

captiveportal_load_rc_config()
{
    CPWORKDIR="/var/captiveportal"
    CPDEFAULTTEMPLATE="/usr/local/opnsense/scripts/OPNsense/CaptivePortal/htdocs_default"

    # extract all zones from captive portal configuration
    CPZONES=`cat /usr/local/etc/captiveportal.conf | grep "\[zone_" | sed 's/\[zone_//' | sed 's/\]//'`
}

captiveportal_cleanup_zones()
{
    # cleanup removed zones
    for installed_zoneid in `ls $CPWORKDIR |  sed 's/zone//g'`; do
        if [ -d $CPWORKDIR/zone$installed_zoneid ]; then
            is_installed=0
            for zoneid in $CPZONES; do
                if [ "$zoneid" -eq "$installed_zoneid" ]; then
                    is_installed=1
                fi
            done
            if [ "$is_installed" -eq 0 ]; then
                echo "Uninstall : zone $installed_zoneid"
                umount "$CPWORKDIR/zone$installed_zoneid/dev"
                rm -rf "$CPWORKDIR/zone$installed_zoneid"
            fi
        fi
    done
}

captiveportal_prestart()
{
    # initialize captiveportal work directory
    mkdir -p $CPWORKDIR
}

captiveportal_start()
{
    # if the API dispatcher is already running, we will assume all parts are running
    if ! pgrep -qF /var/run/lighttpd-api-dispatcher.pid 2> /dev/null; then
        echo "Starting API dispatcher"
        /usr/local/sbin/lighttpd -f /var/etc/lighttpd-api-dispatcher.conf

        # generate ssl certificates
        /usr/local/opnsense/scripts/OPNsense/CaptivePortal/generate_certs.php

        # startup / bootstrap zones
        for zoneid in $CPZONES; do
            # bootstrap captiveportal jail
            zonedirname="zone$zoneid"
            echo "Install : zone $zoneid"
            mkdir -p $CPWORKDIR/$zonedirname
            # remove temp (flush)
            rm -rf $CPWORKDIR/$zonedirname/tmp
            mkdir -p $CPWORKDIR/$zonedirname/tmp
            chmod 770 $CPWORKDIR/$zonedirname/tmp

            mkdir -p $CPWORKDIR/$zonedirname/dev
            if ! mount -uw $CPWORKDIR/$zonedirname/dev 2> /dev/null; then
                mount -t devfs devfs $CPWORKDIR/$zonedirname/dev
            fi

            # sync default template
            cp -a $CPDEFAULTTEMPLATE/ $CPWORKDIR/$zonedirname/htdocs/

            # chown zone files to chroot user
            chown -R www:www $CPWORKDIR/$zonedirname

            # overlay custom user layout if available.
            /usr/local/opnsense/scripts/OPNsense/CaptivePortal/overlay_template.py $zoneid

            # start new instance
            echo "Start : zone $zoneid"
            /usr/local/sbin/lighttpd -f /var/etc/lighttpd-cp-zone-$zoneid.conf
        done

        captiveportal_cleanup_zones
        echo "start captiveportal background process"
        /usr/local/opnsense/scripts/OPNsense/CaptivePortal/cp-background-process.py start
    else
        echo "already running"
    fi
}

# stop captive portal (sub) processes
captiveportal_stop()
{
    # startup API dispatcher, forwards captive portal api request to shared OPNsense API
    if [ -f /var/run/lighttpd-api-dispatcher.pid ]; then
        echo "Stopping API dispatcher"
        /bin/pkill -TERM -F /var/run/lighttpd-api-dispatcher.pid
        if [ -f /var/run/lighttpd-api-dispatcher.pid ]; then
            # in case pkill didn't do anything, always remove pid file
            rm -f /var/run/lighttpd-api-dispatcher.pid
        fi
    fi

    # stopping zone http servers
    for zoneid in $CPZONES; do
        # stop running instance
        zonepid="/var/run/lighttpd-cp-zone-$zoneid.pid"
        if [ -f $zonepid ]; then
            echo "Stop : zone $zoneid"
            /bin/pkill -TERM -F $zonepid
            rm -f $zonepid
        fi
    done

    # stopping unconfigured zones (not in $CPZONES list)
    for zonepid in `ls /var/run/lighttpd-cp-zone-*.pid 2>/dev/null`; do
        /bin/pkill -TERM -F $zonepid
        rm -f $zonepid
    done

    if [ -f /var/run/captiveportal.db.pid ]; then
        echo "stop captiveportal background process"
        /bin/pkill -TERM -F /var/run/captiveportal.db.pid
    fi

    captiveportal_cleanup_zones
}

captiveportal_load_rc_config
load_rc_config $name
run_rc_command $1

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