Merge pull request #2663 from viirya/fix_nameserver_regex

Fix nameserver regex

utils/utils.go

@@ -944,7 +944,7 @@ func StripComments(input []byte, commentMarker []byte) []byte {
 func GetNameserversAsCIDR(resolvConf []byte) []string {
 	var parsedResolvConf = StripComments(resolvConf, []byte("#"))
 	nameservers := []string{}
-	re := regexp.MustCompile(`^\s*nameserver\s*(([0-9]\.){3}([0-9]))\s*$`)
+	re := regexp.MustCompile(`^\s*nameserver\s*(([0-9]+\.){3}([0-9]+))\s*$`)
 	for _, line := range bytes.Split(parsedResolvConf, []byte("\n")) {
 		var ns = re.FindSubmatch(line)
 		if len(ns) > 0 {

utils/utils_test.go

@@ -481,12 +481,12 @@ func TestParsePortMapping(t *testing.T) {
 func TestGetNameserversAsCIDR(t *testing.T) {
 	for resolv, result := range map[string][]string{`
 nameserver 1.2.3.4
-nameserver 4.3.2.1
-search example.com`: {"1.2.3.4/32", "4.3.2.1/32"},
+nameserver 40.3.200.10
+search example.com`: {"1.2.3.4/32", "40.3.200.10/32"},
 		`search example.com`: {},
 		`nameserver 1.2.3.4
 search example.com
-nameserver 4.3.2.1`: {"1.2.3.4/32", "4.3.2.1/32"},
+nameserver 4.30.20.100`: {"1.2.3.4/32", "4.30.20.100/32"},
 		``: {},
 		`  nameserver 1.2.3.4   `: {"1.2.3.4/32"},
 		`search example.com