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41 lines
670 B
Go
41 lines
670 B
Go
package netx
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import "net"
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// InternalIp returns an internal ip.
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func InternalIp() string {
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infs, err := net.Interfaces()
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if err != nil {
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return ""
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}
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for _, inf := range infs {
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if isEthDown(inf.Flags) || isLoopback(inf.Flags) {
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continue
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}
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addrs, err := inf.Addrs()
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if err != nil {
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continue
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}
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for _, addr := range addrs {
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if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
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if ipnet.IP.To4() != nil {
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return ipnet.IP.String()
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}
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}
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}
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}
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return ""
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}
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func isEthDown(f net.Flags) bool {
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return f&net.FlagUp != net.FlagUp
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}
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func isLoopback(f net.Flags) bool {
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return f&net.FlagLoopback == net.FlagLoopback
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}
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