refactor progress

fluxer_devops/livekitctl/internal/netutil/netutil.go

@@ -0,0 +1,122 @@
+/*
+ * 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 netutil
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+)
+
+func DetectPublicIP(family string) string {
+	var urls []string
+	if family == "4" {
+		urls = []string{"https://api.ipify.org", "https://ipv4.icanhazip.com"}
+	} else if family == "6" {
+		urls = []string{"https://api64.ipify.org", "https://ipv6.icanhazip.com"}
+	}
+
+	client := &http.Client{Timeout: 10 * time.Second}
+
+	for _, u := range urls {
+		req, err := http.NewRequest("GET", u, nil)
+		if err != nil {
+			continue
+		}
+		req.Header.Set("User-Agent", "livekitctl/0.1")
+
+		resp, err := client.Do(req)
+		if err != nil {
+			continue
+		}
+
+		body, err := io.ReadAll(resp.Body)
+		resp.Body.Close()
+		if err != nil {
+			continue
+		}
+
+		ip := strings.TrimSpace(strings.Split(string(body), "\n")[0])
+
+		if family == "4" {
+			if parsed := net.ParseIP(ip); parsed != nil && parsed.To4() != nil {
+				return ip
+			}
+		} else {
+			if parsed := net.ParseIP(ip); parsed != nil && parsed.To4() == nil {
+				return ip
+			}
+		}
+	}
+
+	return ""
+}
+
+func HasGlobalIPv6() bool {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return false
+	}
+
+	for _, addr := range addrs {
+		ipNet, ok := addr.(*net.IPNet)
+		if !ok {
+			continue
+		}
+		ip := ipNet.IP
+		if ip.To4() != nil {
+			continue
+		}
+		if ip.IsGlobalUnicast() && !ip.IsPrivate() {
+			return true
+		}
+	}
+
+	return false
+}
+
+func PrimaryPrivateIPv4() string {
+	conn, err := net.Dial("udp", "8.8.8.8:80")
+	if err != nil {
+		return ""
+	}
+	defer conn.Close()
+
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+	ip := localAddr.IP.To4()
+	if ip == nil {
+		return ""
+	}
+	return ip.String()
+}
+
+func IsPrivateIPv4(ipStr string) bool {
+	ip := net.ParseIP(ipStr)
+	if ip == nil {
+		return false
+	}
+	ip4 := ip.To4()
+	if ip4 == nil {
+		return false
+	}
+	return ip.IsPrivate()
+}