From 2353456a607f38d153971ca19768e1ab03942fb6 Mon Sep 17 00:00:00 2001
From: jc_gargma <jc_gargma@iserlohn-fortress.net>
Date: Fri, 24 Dec 2021 00:59:13 -0800
Subject: initial commit

---
 PKGBUILD    | 29 +++++++++++++++++++
 ipset.confd | 16 +++++++++++
 ipset.initd | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 PKGBUILD
 create mode 100644 ipset.confd
 create mode 100644 ipset.initd

diff --git a/PKGBUILD b/PKGBUILD
new file mode 100644
index 0000000..8facfab
--- /dev/null
+++ b/PKGBUILD
@@ -0,0 +1,29 @@
+# Maintainer: jc_gargma <jc_gargma@iserlohn-fortress.net>
+
+# # I maintain this because:
+# Artix lacks this init script entirely
+
+_pkgname=ipset
+pkgname=${_pkgname}-openrc
+pkgver=20211217
+pkgrel=1
+pkgdesc="OpenRC ${_pkgname} init script"
+arch=('any')
+url="https://library.iserlohn-fortress.net/ipset-openrc.git/"
+license=('GPL2')
+groups=('openrc-galaxy')
+backup=(
+        "etc/conf.d/${_pkgname}"
+        )
+source=(
+        "${_pkgname}.initd"
+        "${_pkgname}.confd"
+        )
+b2sums=('9c376e1a5083829a1fc40bfcca192cad19644c8ba585c29018a55837c0788127963071de2a94a251288ee19a7308ba4d7d80f48f3bc1aba497489872f9810479'
+        'fb1b728c12953cb6d5009469eaeeb9e58e01dd76b6849ad554d545bab417e8614d6417be52c2079b961bc66e355cf27c697ac3b2e0fcd823f978c39d14c66264')
+
+package() {
+depends=('openrc' "${_pkgname}")
+    install -Dm755 ${srcdir}/${_pkgname}.initd ${pkgdir}/etc/init.d/${_pkgname}
+    install -Dm644 ${srcdir}/${_pkgname}.confd ${pkgdir}/etc/conf.d/${_pkgname}
+}
diff --git a/ipset.confd b/ipset.confd
new file mode 100644
index 0000000..9fe42e9
--- /dev/null
+++ b/ipset.confd
@@ -0,0 +1,16 @@
+# /etc/conf.d/ipset
+
+# Location in which ipset initscript will save set rules on 
+# service shutdown
+IPSET_SAVE="/var/lib/ipset/rules-save"
+
+# Save state on stopping ipset
+SAVE_ON_STOP="yes"
+
+# If you need to log iptables messages as soon as iptables starts,
+# AND your logger does NOT depend on the network, then you may wish
+# to uncomment the next line.
+# If your logger depends on the network, and you uncomment this line
+# you will create an unresolvable circular dependency during startup.
+# After commenting or uncommenting this line, you must run 'rc-update -u'.
+#rc_use="logger"
diff --git a/ipset.initd b/ipset.initd
new file mode 100644
index 0000000..32ab581
--- /dev/null
+++ b/ipset.initd
@@ -0,0 +1,94 @@
+#!/sbin/openrc-run
+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+extra_commands="save"
+extra_started_commands="reload"
+
+IPSET_SAVE=${IPSET_SAVE:-/var/lib/ipset/rules-save}
+
+depend() {
+    before iptables ip6tables
+}
+
+checkconfig() {
+    if [ ! -f "${IPSET_SAVE}" ] ; then
+        eerror "Not starting ${SVCNAME}. First create some rules then run:"
+        eerror "/etc/init.d/${SVCNAME} save"
+        return 1
+    fi
+    return 0
+}
+
+start() {
+    checkconfig || return 1
+    ebegin "Loading ipset session"
+    ipset restore < "${IPSET_SAVE}"
+    eend $?
+}
+
+stop() {
+    # check if there are any references to current sets
+
+    if ! ipset list | gawk '
+        ($1 == "References:") { refcnt += $2 }
+        ($1 == "Type:" && $2 == "list:set") { set = 1 }
+        (scan) { if ($0 != "") setcnt++; else { scan = 0; set = 0 } }
+        (set && $1 == "Members:") {scan = 1}
+        END { if ((refcnt - setcnt) > 0) exit 1 }
+    '; then
+        eerror "ipset is in use, can't stop"
+        return 1
+    fi
+
+    if [ "${SAVE_ON_STOP}" = "yes" ] ; then
+        save || return 1
+    fi
+
+    ebegin "Removing kernel IP sets"
+    ipset flush
+    ipset destroy
+    eend $?
+}
+
+reload() {
+    ebegin "Reloading ipsets"
+
+    # Loading sets from a save file is only additive (there is no
+    # automatic flushing or replacing). And, we can not remove sets
+    # that are currently used in existing iptables rules.
+    #
+    # Instead, we create new temp sets for any set that is already
+    # in use, and then atomically swap them into place.
+    #
+    # XXX: This does not clean out previously used ipsets that are
+    # not in the new saved policy--it can't, because they may still
+    # be referenced in the current iptables rules.
+
+    # Build a list of all currently used sets (if any).
+    running_ipset_list=$(ipset save | gawk '/^create/{printf "%s ",$2}')
+	running_ipset_list="${running_ipset_list% }"
+    # Build a regular expression that matches those set names.
+    running_ipset_list_regex="$(echo "$running_ipset_list" | tr -s ' ' '|' )"
+
+    # Load up sets from the save file, but rename any set that already
+    # exists to a temporary name that we will swap later.
+    if ! cat ${IPSET_SAVE} | sed -r "s/^(create|add) (${running_ipset_list_regex}) /\1 \2_atomic_temp /" | ipset restore ; then
+        eend $? "Failed to load new ipsets"
+    fi
+
+    # Now for every set name that currently exists, atomically swap it
+    # with the temporary new one we created, and then destroy the old set.
+    for ipset_name in ${running_ipset_list} ; do
+        ipset swap ${ipset_name} ${ipset_name}_atomic_temp || eend $? "Failed to swap in new ipset $ipset_name"
+        ipset destroy ${ipset_name}_atomic_temp || eend $? "Failed to delete obsolete ipset ${ipset_name}_atomic_temp"
+    done
+    eend 0
+}
+
+save() {
+    ebegin "Saving ipset session"
+    checkpath --file --mode 0600 "${IPSET_SAVE}"
+    ipset save > "${IPSET_SAVE}"
+    eend $?
+}
-- 
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