From ccc722b7ed330198d82a3cf28ead76d6d107a70a Mon Sep 17 00:00:00 2001
From: davidovski <david@davidovski.xyz>
Date: Mon, 6 Jun 2022 21:25:48 +0000
Subject: added java

---
 repo/unbound/migrate-dnscache-to-unbound | 147 +++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 repo/unbound/migrate-dnscache-to-unbound

(limited to 'repo/unbound/migrate-dnscache-to-unbound')

diff --git a/repo/unbound/migrate-dnscache-to-unbound b/repo/unbound/migrate-dnscache-to-unbound
new file mode 100644
index 0000000..03b34cd
--- /dev/null
+++ b/repo/unbound/migrate-dnscache-to-unbound
@@ -0,0 +1,147 @@
+#!/bin/sh
+
+
+to_subnet() {
+	pref=$1
+	case "$pref" in
+	*.*.*.*) echo $pref/32;;
+	*.*.*) echo $pref.0/24;;
+	*.*) echo $pref.0.0/16;;
+	*) echo $pref.0.0.0/8;;
+	esac
+}
+
+gen_config() {
+	echo "# Config generated by $0, $(date)"
+	echo "server:"
+
+	[ -n "$IP" ] && echo -e "\tinterface: $IP\n"
+	[ -n "$IPSEND" ] && echo -e "\toutgoing-interface: $IPSEND\n"
+
+	for i in $access_control; do
+		echo -e "\taccess-control: $i allow"
+	done
+	echo ""
+
+	# stub zones
+	local zonefile ip
+	local fwdtype="stub"
+	if [ -n "$FORWARDONLY" ]; then
+		fwdtype="forward"
+	fi
+	for zonefile in "$root"/etc/dnscache/servers/*; do
+		local zone=${zonefile##*/}
+		case "$zone" in
+			'@'|'*'|*.apk-new) continue;;
+		esac
+		echo "${fwdtype}-zone:"
+		echo -e "\tname: ${zone}"
+		for ip in $(cat $zonefile); do
+			echo -e "\t${fwdtype}-addr: $ip"
+		done
+		echo ""
+	done
+}
+
+usage() {
+	cat >&2 <<EOF
+usage: $0 [-h] [-r ROOT]
+Migrate dnscache configuration to unbound
+
+This tool will install unbound, migrate the configuration, stop dnscache
+and start unbound and remove traces of dnscache.
+
+Options:
+ -c  Only dump the config to stdout and exit
+ -h  Show this help
+ -k  Keep unbound.conf.backup and keep dnscache config
+ -r  Look for dnscache config in ROOT/etc/dnscache
+
+EOF
+}
+
+root=${ROOT:-/}
+dump_config=false
+quiet=false
+keep_backup=false
+while getopts "chr:" opt; do
+	case "$opt" in
+	'c') dump_config=true;;
+	'h') usage; exit;;
+	'k') keep_backup=true;;
+	'r') root="$OPTARG";;
+	'q') quiet=true; quiet_opt=--quiet;;
+	esac
+done
+unbound_conf=${UNBOUND_CONF:-${root%/}/etc/unbound/unbound.conf}
+
+# read dnscache config
+if ! [ -f "$root"/etc/conf.d/dnscache ] && ! [ -d "$root"/etc/dnscache ]; then
+	echo "No dnscache config found"
+	exit 1
+fi
+
+confd="$root"/etc/conf.d/dnscache
+if [ -r "$confd" ]; then
+	. "$confd"
+fi
+
+interface="$IP"
+outgoing_interface="$IPSEND"
+
+for i in "$root"/etc/dnscache/ip/*; do
+	[ -f "$i" ] || continue
+	access_control="$access_control $(to_subnet ${i##*/})"
+done
+
+if $dump_config; then
+	gen_config
+	exit 0
+fi
+
+# install unbound if needed
+if ! apk info -e unbound; then
+	apk add $quiet_opt unbound
+fi
+
+# generate config
+if [ -f "$unbound_conf" ]; then
+	$quiet || echo "Backing up $unbound_conf" >&2
+	mv "$unbound_conf" "${unbound_conf}".backup
+fi
+
+$quiet || echo "Generating $unbound_conf" >&2
+gen_config > "$unbound_conf"
+
+# stop dnscache and start unbound
+if /etc/init.d/dnscache --quiet status 2>/dev/null; then
+	/etc/init.d/dnscache $quiet_opt stop
+	if ! /etc/init.d/unbound $quiet_opt start; then
+		echo "Failed to start unbound. Starting up dnscache again"
+		/etc/init.d/dnscache $quiet_opt start
+		exit 1
+	fi
+fi
+
+# update runlevels
+errors=0
+if rc-update | grep -q -w dnscache; then
+	runlevels=$(rc-update | awk '$1 == "dnscache" { FS="|"; $0 = $0; print $2 }')
+	for level in $runlevels; do
+		rc-update $quiet_opt add unbound $level \
+			|| errors=$(($errors + 1))
+		rc-update $quiet_opt del dnscache $level \
+			|| errors=$(($errors + 1))
+	done
+fi
+
+# cleanup if requested
+if [ $errors -eq 0 ] && ! $keep_backup ; then
+	$quiet || echo "Purging dnscache and dnscache config" >&2
+	apk del --purge $quiet_opt dnscache
+	rm -rf $root/etc/dnscache $root/etc/conf.d/dnscache
+	$quiet || echo "Purging ${unbound_conf}.backup" >&2
+	rm -rf ${unbound_conf}.backup
+fi
+
+exit $errors
-- 
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