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nodes api: improve local IP detection with outbound dial fallback

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This commit is contained in:
DBT
2026-02-26 03:08:18 +00:00
parent f05759b57e
commit 47507d1145
1 changed files with 31 additions and 22 deletions
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53
pkg/nodes/registry_server.go
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@@ -847,30 +847,39 @@ func detectWebUIVersion(webUIDir string) string {
func detectLocalIP() string {
ifaces, err := net.Interfaces()
if err != nil {
return ""
}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
continue
if err == nil {
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
continue
}
addrs, _ := iface.Addrs()
for _, a := range addrs {
var ip net.IP
switch v := a.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
if ip == nil || ip.IsLoopback() {
continue
}
ip = ip.To4()
if ip == nil {
continue
}
return ip.String()
}
}
addrs, _ := iface.Addrs()
for _, a := range addrs {
var ip net.IP
switch v := a.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
// Fallback: detect outbound source IP.
conn, err := net.Dial("udp", "8.8.8.8:80")
if err == nil {
defer conn.Close()
if ua, ok := conn.LocalAddr().(*net.UDPAddr); ok && ua.IP != nil {
if ip := ua.IP.To4(); ip != nil {
return ip.String()
}
if ip == nil || ip.IsLoopback() {
continue
}
ip = ip.To4()
if ip == nil {
continue
}
return ip.String()
}
}
return ""