[功能] 优化节点 IP 解析逻辑，优先使用公网地址并添加相关测试

openflare_agent/go.mod

@@ -1,3 +1,7 @@
 module openflare-agent
 
-go 1.23.0
+go 1.24.0
+
+require openflare v0.0.0
+
+replace openflare => ../openflare_server

openflare_agent/internal/config/config.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"net"
+	"openflare/utils/geoip/iputil"
 	"os"
 	pathpkg "path"
 	"path/filepath"
@@ -331,6 +332,8 @@ func detectNodeIP() string {
 	if err != nil {
 		return ""
 	}
+	bestIP := ""
+	bestPriority := -1
 	for _, iface := range interfaces {
 		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
 			continue
@@ -344,11 +347,27 @@ func detectNodeIP() string {
 			if !ok || ipNet.IP == nil || ipNet.IP.IsLoopback() {
 				continue
 			}
-			ipv4 := ipNet.IP.To4()
-			if ipv4 != nil {
-				return ipv4.String()
+			ipv4 := normalizeIPv4(ipNet.IP)
+			priority := nodeIPPriority(ipv4)
+			if priority > bestPriority {
+				bestIP = ipv4.String()
+				bestPriority = priority
+			}
+			if bestPriority == 2 {
+				return bestIP
 			}
 		}
 	}
-	return ""
+	return bestIP
+}
+
+func normalizeIPv4(ip net.IP) net.IP {
+	if ip == nil {
+		return nil
+	}
+	return ip.To4()
+}
+
+func nodeIPPriority(ip net.IP) int {
+	return iputil.Score(ip)
 }

openflare_agent/internal/config/config_test.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"encoding/json"
+	"net"
 	"os"
 	"path/filepath"
 	"testing"
@@ -326,3 +327,49 @@ func TestInitialAuthToken(t *testing.T) {
 		})
 	}
 }
+
+func TestNodeIPPriority(t *testing.T) {
+	tests := []struct {
+		name     string
+		ip       string
+		expected int
+	}{
+		{
+			name:     "public ipv4 preferred",
+			ip:       "8.8.8.8",
+			expected: 2,
+		},
+		{
+			name:     "private ipv4 fallback",
+			ip:       "10.0.0.8",
+			expected: 1,
+		},
+		{
+			name:     "link local ignored",
+			ip:       "169.254.1.10",
+			expected: -1,
+		},
+		{
+			name:     "loopback ignored",
+			ip:       "127.0.0.1",
+			expected: -1,
+		},
+		{
+			name:     "nil ignored",
+			ip:       "",
+			expected: -1,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var parsed net.IP
+			if tt.ip != "" {
+				parsed = net.ParseIP(tt.ip)
+			}
+			if got := nodeIPPriority(parsed); got != tt.expected {
+				t.Fatalf("unexpected priority for %q: got %d want %d", tt.ip, got, tt.expected)
+			}
+		})
+	}
+}