[Buildroot] [PATCH v2] package/iptables: add init script

[José Pekkarinen]

On Wed, Sep 15, 2021 at 1:09 PM Baruch Siach <baruch at tkos.co.il> wrote:

> Hi José,
>
> On Wed, Sep 15 2021, José Pekkarinen wrote:
> > On Tue, Sep 14, 2021 at 7:22 PM Baruch Siach <baruch at tkos.co.il> wrote:
> >  On Tue, Sep 14 2021, José Pekkarinen wrote:
> >  > This patch will add an init script that allows
> >  > to set a ruleset in /etc/iptables.conf to be loaded
> >  > on boot, or flushed on stop, as well as a saving
> >  > command to generate a new file.
> >  >
> >  > Signed-off-by: José Pekkarinen <jose.pekkarinen at unikie.com>
> >  > ---
> >  > [v1 -> v2] s/touch $(DESTDIR)/touch $(TARGET_DIR)/
> >  >
> >  >  package/iptables/S41iptables | 58
> ++++++++++++++++++++++++++++++++++++
> >  >  package/iptables/iptables.mk |  6 ++++
> >  >  2 files changed, 64 insertions(+)
> >  >  create mode 100644 package/iptables/S41iptables
> >  >
> >  > diff --git a/package/iptables/S41iptables
> b/package/iptables/S41iptables
> >  > new file mode 100644
> >  > index 0000000000..93998b78de
> >  > --- /dev/null
> >  > +++ b/package/iptables/S41iptables
> >  > @@ -0,0 +1,58 @@
> >  > +#!/bin/sh
> >  > +
> >  > +DAEMON="iptables"
> >  > +
> >  > +IPTABLES_ARGS=""
> >  > +
> >  > +start() {
> >  > +     printf 'Starting %s: ' "$DAEMON"
> >  > +     iptables-restore < /etc/iptables.conf
> >  > +     status=$?
> >  > +     if [ "$status" -eq 0 ]; then
> >  > +             echo "OK"
> >  > +     else
> >  > +             echo "FAIL"
> >  > +     fi
> >  > +     return "$status"
> >  > +}
> >  > +
> >  > +stop() {
> >  > +     printf 'Stopping %s: ' "$DAEMON"
> >  > +     iptables -F
> >  > +     status=$?
> >  > +     if [ "$status" -eq 0 ]; then
> >  > +             echo "OK"
> >  > +     else
> >  > +             echo "FAIL"
> >  > +     fi
> >  > +     return "$status"
> >  > +}
> >  > +
> >  > +restart() {
> >  > +     stop
> >  > +     sleep 1
> >  > +     start
> >  > +}
> >  > +
> >  > +save() {
> >  > +     printf 'Saving %s: ' "$DAEMON"
> >  > +     iptables-save > /etc/iptables.conf
> >
> >  What about read-only rootfs?
> >
> >     Very good point, will it work if we check the rootfs
> > whether is ro or rw, and execute on that behalf?
>
> I'm not sure that this script is a good idea to begin with for the
> default installation. But if the maintainers think it is, the script
> should skip the save operation for read-only filesystems. See how
> package/urandom-scripts/S20urandom handles that.
>

    Thanks again, I'm testing a patch to solve the ro rootfs
issue. Is there any better approach to have a firewall ruleset
by default in the final image?

    Best regards.

    José.


>
> baruch
>
> >
> >     Thanks for the comments!
> >
> >     José.
> >
> >  baruch
> >
> >  > +     status=$?
> >  > +     if [ "$status" -eq 0 ]; then
> >  > +             echo "OK"
> >  > +     else
> >  > +             echo "FAIL"
> >  > +     fi
> >  > +     return "$status"
> >  > +}
> >  > +
> >  > +case "$1" in
> >  > +     start|stop|restart|save)
> >  > +             "$1";;
> >  > +     reload)
> >  > +             # Restart, since there is no true "reload" feature.
> >  > +             restart;;
> >  > +     *)
> >  > +             echo "Usage: $0 {start|stop|restart|reload}"
> >  > +             exit 1
> >  > +esac
> >  > diff --git a/package/iptables/iptables.mk b/package/iptables/
> iptables.mk
> >  > index dc01466607..1d3612dbf6 100644
> >  > --- a/package/iptables/iptables.mk
> >  > +++ b/package/iptables/iptables.mk
> >  > @@ -57,4 +57,10 @@ define IPTABLES_LINUX_CONFIG_FIXUPS
> >  >       $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES)
> >  >  endef
> >  >
> >  > +define IPTABLES_INSTALL_INIT_SYSV
> >  > +     $(INSTALL) -m 0755 -D package/iptables/S41iptables \
> >  > +             $(TARGET_DIR)/etc/init.d/S41iptables
> >  > +     touch $(TARGET_DIR)/etc/iptables.conf
> >  > +endef
> >  > +
> >  >  $(eval $(autotools-package))
>
> --
>                                                      ~. .~   Tk Open
> Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -
>


-- 

José.
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