summaryrefslogtreecommitdiff
path: root/user/nftables/nftables.initd
diff options
context:
space:
mode:
authormultiplexd <multi@in-addr.xyz>2019-01-11 21:37:54 +0000
committermultiplexd <multi@in-addr.xyz>2019-01-11 21:39:04 +0000
commita21b49c9ed1b34c463560d31c0cbeead46810038 (patch)
treed2e6e6a455ddaa0afb0065b17d8e0bd4f3756139 /user/nftables/nftables.initd
parentb74b52b3497bd84c18867d4259c48012ab375014 (diff)
downloadpackages-a21b49c9ed1b34c463560d31c0cbeead46810038.tar.gz
packages-a21b49c9ed1b34c463560d31c0cbeead46810038.tar.bz2
packages-a21b49c9ed1b34c463560d31c0cbeead46810038.tar.xz
packages-a21b49c9ed1b34c463560d31c0cbeead46810038.zip
user/nftables: new package
Diffstat (limited to 'user/nftables/nftables.initd')
-rw-r--r--user/nftables/nftables.initd127
1 files changed, 127 insertions, 0 deletions
diff --git a/user/nftables/nftables.initd b/user/nftables/nftables.initd
new file mode 100644
index 000000000..c763b395d
--- /dev/null
+++ b/user/nftables/nftables.initd
@@ -0,0 +1,127 @@
+#!/sbin/openrc-run
+# Copyright 2014 Nicholas Vinson
+# Copyright 1999-2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+extra_commands="list panic save"
+extra_started_commands="reload"
+
+description="Manage nftable based firewall."
+description_save="Save current nftables rulesets to disk."
+description_list="Displays the current nftables ruleset."
+description_panic="Immediately drop all packets on all interfaces."
+description_reload="Clear current rulesets and load rulesets from the saved ruleset files."
+
+# Uppercase variables are there for backward compatibility.
+: ${rules_file:=${NFTABLES_SAVE:="/etc/firewall.nft"}}
+: ${save_options:=${SAVE_OPTIONS:="-n"}}
+: ${save_on_stop:=${SAVE_ON_STOP:="yes"}}
+: ${enable_forwarding:="no"}
+
+depend() {
+ need localmount
+ after sysctl
+ before net
+ provide firewall
+}
+
+start_pre() {
+ checkkernel && checkconfig
+}
+
+list() {
+ nft list ruleset
+}
+
+panic() {
+ checkkernel || return 1
+
+ if service_started "$RC_SVCNAME"; then
+ rc-service "$RC_SVCNAME" stop
+ fi
+
+ ebegin "Dropping all packets"
+ nft -f /dev/stdin <<-EOF
+ flush ruleset
+ table inet filter {
+ chain input { type filter hook input priority 0; policy drop; }
+ chain forward { type filter hook forward priority 0; policy drop; }
+ chain output { type filter hook output priority 0; policy drop; }
+ }
+ EOF
+ eend $?
+}
+
+reload() {
+ start
+}
+
+save() {
+ ebegin "Saving nftables state"
+
+ checkpath -q -d "${rules_file%/*}"
+ checkpath -q -m 0600 -f "$rules_file"
+
+ local tmp_save="$rules_file.tmp"
+
+ echo 'flush ruleset' > "$tmp_save"
+ nft list ruleset >> "$tmp_save"; local retval=$?
+
+ [ $retval -eq 0 ] && mv "$tmp_save" "$rules_file"
+
+ return $retval
+}
+
+start() {
+ ebegin "Loading nftables state and starting firewall"
+
+ nft -f "$rules_file"
+ eend $? || return 1
+
+ if yesno "$enable_forwarding"; then
+ ebegin "Enabling forwarding"
+ forwarding 1
+ eend $? || return 1
+ fi
+}
+
+stop() {
+ if yesno "$save_on_stop"; then
+ save || return 1
+ fi
+
+ if yesno "$enable_forwarding"; then
+ ebegin "Disabling forwarding"
+ forwarding 0
+ eend $?
+ fi
+
+ ebegin "Stopping firewall"
+ nft flush ruleset
+ eend $?
+}
+
+checkconfig() {
+ if [ ! -f "$rules_file" ]; then
+ eerror "Not starting nftables. First create some rules then run:"
+ eerror " rc-service nftables save"
+ return 1
+ fi
+ return 0
+}
+
+checkkernel() {
+ if ! nft list tables >/dev/null 2>&1; then
+ eerror "Your kernel lacks nftables support, please load"
+ eerror "appropriate modules and try again."
+ return 1
+ fi
+ return 0
+}
+
+forwarding() {
+ /sbin/sysctl -qw \
+ net.ipv4.ip_forward=$1 \
+ net.ipv6.conf.default.forwarding=$1 \
+ net.ipv6.conf.all.forwarding=$1
+}