refactor progress

fluxer_devops/livekitctl/internal/dnswait/dnswait.go

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dnswait
+
+import (
+	"net"
+	"time"
+)
+
+func ResolveA(host string) []string {
+	var out []string
+	addrs, err := net.LookupIP(host)
+	if err != nil {
+		return out
+	}
+	for _, addr := range addrs {
+		if ip4 := addr.To4(); ip4 != nil {
+			out = append(out, ip4.String())
+		}
+	}
+	return out
+}
+
+func ResolveAAAA(host string) []string {
+	var out []string
+	addrs, err := net.LookupIP(host)
+	if err != nil {
+		return out
+	}
+	for _, addr := range addrs {
+		if addr.To4() == nil {
+			out = append(out, addr.String())
+		}
+	}
+	return out
+}
+
+func contains(slice []string, item string) bool {
+	for _, s := range slice {
+		if s == item {
+			return true
+		}
+	}
+	return false
+}
+
+func WaitForDNS(livekitDomain, turnDomain, publicIPv4, publicIPv6 string, timeoutS, intervalS int) bool {
+	if timeoutS < 1 {
+		timeoutS = 1
+	}
+	if intervalS < 1 {
+		intervalS = 1
+	}
+
+	deadline := time.Now().Add(time.Duration(timeoutS) * time.Second)
+
+	for {
+		a1 := ResolveA(livekitDomain)
+		a2 := ResolveA(turnDomain)
+		ok4 := contains(a1, publicIPv4) && contains(a2, publicIPv4)
+
+		ok6 := true
+		if publicIPv6 != "" {
+			aaaa1 := ResolveAAAA(livekitDomain)
+			aaaa2 := ResolveAAAA(turnDomain)
+			ok6 = contains(aaaa1, publicIPv6) && contains(aaaa2, publicIPv6)
+		}
+
+		if ok4 && ok6 {
+			return true
+		}
+
+		if time.Now().After(deadline) {
+			return false
+		}
+
+		time.Sleep(time.Duration(intervalS) * time.Second)
+	}
+}