ufw 0.35-0ubuntu2 / postinst

#!/bin/sh -e

# Only source /usr/share/debconf/confmodule when not called with 'triggered'
# to avoid LP: #618410.
if [ "$1" != "triggered" ]; then
    . /usr/share/debconf/confmodule
fi

RULES_PATH="/etc/ufw"
OLD_USER_PATH="/lib/ufw"
USER_PATH="$RULES_PATH"
TEMPLATE_PATH="/usr/share/ufw"

enable_ufw() {
    ans=""
    if [ "$1" = "true" ]; then
        ans="yes"
    elif [ "$1" = "false" ]; then
        ans="no"
    else
        return 1
    fi

    test -f /etc/ufw/ufw.conf && sed -i "s/^ENABLED=.*/ENABLED=$ans/" /etc/ufw/ufw.conf
}

allow_port() {
    ufw allow "$@" >/dev/null || true
}

allow_service() {
    service=`echo "$@" | sed 's/#/ /g'`
    if [ "$service" = "CUPS" ]; then
        allow_port 631
    elif [ "$service" = "DNS" ]; then
        allow_port 53
    elif [ "$service" = "IMAPS" ]; then
        allow_port 993/tcp
    elif [ "$service" = "POP3S" ]; then
        allow_port 995/tcp
    elif [ "$service" = "SSH" ]; then
        allow_port 22/tcp
    elif [ "$service" = "CIFS (Samba)" ]; then
        allow_port 137/udp
        allow_port 138/udp
        allow_port 139/tcp
        allow_port 445/tcp
    elif [ "$service" = "SMTP" ]; then
        allow_port 25/tcp
    elif [ "$service" = "HTTP" ]; then
        allow_port 80/tcp
    elif [ "$service" = "HTTPS" ]; then
        allow_port 443/tcp
    fi
}

# If a primary chain is added to upstream, we should add it on upgrade so
# reload works correctly
add_primary_chain() {
    chain="$1"
    builtin="$2"
    ver="$3"

    exe="iptables"
    if [ "$ver" = "6" ]; then
        exe="ip6tables"
    fi
    if $exe -L "$chain" -n >/dev/null 2>&1 ; then
        return
    fi
    $exe -N "$chain" || true
    $exe -A "$builtin" -j "$chain" || true
}

case "$1" in
    configure)
        # these files are required, but don't want to change them if
        # the user modified them
        for f in before.rules before6.rules after.rules after6.rules
        do
            ucf --debconf-ok $TEMPLATE_PATH/iptables/$f $RULES_PATH/$f
            test -f $RULES_PATH/$f && chmod 640 $RULES_PATH/$f
        done

        # migrate user rules on upgrade
        if [ ! -z "$2" ] && dpkg --compare-versions "$2" lt "0.35~" ; then
            for f in user.rules user6.rules
            do
                mv $OLD_USER_PATH/$f $USER_PATH/$f
                ln -s $USER_PATH/$f $OLD_USER_PATH/$f
            done
        fi

        for f in user.rules user6.rules
        do
            if [ ! -e "$USER_PATH/$f" ]; then
                # if no config, copy the template
                cp $TEMPLATE_PATH/iptables/$f $USER_PATH/$f
                chmod 640 $USER_PATH/$f
            fi
        done

        for f in before.init after.init
        do
            if [ ! -e "/etc/ufw/$f" ]; then
                cp $TEMPLATE_PATH/$f /etc/ufw
                chmod 640 /etc/ufw/$f
            fi
        done

        if [ ! -e "/etc/ufw/ufw.conf" ]; then
            cp $TEMPLATE_PATH/ufw.conf /etc/ufw
        fi

        # configure ufw with debconf values
        db_get ufw/enable
        enabled="$RET"

        db_fget ufw/existing_configuration seen
        seen_warning="$RET"
        if [ "$enabled" = "true" ] && [ "$seen_warning" = "false" ] ; then
            db_get ufw/allow_known_ports
            CHOICES="$RET"
            for service in `echo "$CHOICES" | sed 's/, /\n/g' | sed 's/ /#/g'`; do
                allow_service "$service"
            done

            db_get ufw/allow_custom_ports
            PORTS="$RET"
            for port in $PORTS ; do
                allow_port "$port"
            done

            db_fset ufw/existing_configuration seen true
        fi

        # need to do this after all 'allow_service' calls, otherwise ufw may
        # try to use iptables, which breaks the installer
        enable_ufw "$enabled"

        # add new primary chains on upgrade
        if [ "$enabled" = "true" ] && [ ! -z "$2" ] && dpkg --compare-versions "$2" lt "0.34~rc-0ubuntu2" ; then
            add_primary_chain ufw-track-forward FORWARD
            add_primary_chain ufw6-track-forward FORWARD 6
        fi
        ;;
    triggered)
        ufw app update all || echo "Processing ufw triggers failed. Ignoring."
        exit 0
        ;;
    abort-upgrade|abort-remove|abort-deconfigure)
        ;;
    *)
        echo "postinst called with unknown argument '$1'" >&2
        exit 1
        ;;
esac

# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask ufw.service >/dev/null || true

# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled ufw.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable ufw.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state ufw.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/ufw" ]; then
		update-rc.d ufw defaults >/dev/null || exit $?
	fi
fi
# End automatically added section

# Automatically added by dhpython:
if which py3compile >/dev/null 2>&1; then
	py3compile -p ufw -V 3.2-
fi

# End automatically added section