mirror of
https://github.com/Rain-kl/OpenFlare.git
synced 2026-09-30 06:16:37 +08:00
ryan
42 lines
822 B
Go
42 lines
822 B
Go
package utils
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import (
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"log/slog"
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"net"
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"strings"
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)
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// GetIP returns the first private IPv4 address found on the local network interfaces.
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func GetIP() (ip string) {
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ips, err := net.InterfaceAddrs()
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if err != nil {
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slog.Error("get interface addresses failed", "error", err)
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return ip
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}
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for _, a := range ips {
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if candidate, ok := privateIPv4FromAddr(a); ok {
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return candidate
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}
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}
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return
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}
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func privateIPv4FromAddr(addr net.Addr) (string, bool) {
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ipNet, ok := addr.(*net.IPNet)
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if !ok || ipNet.IP.IsLoopback() || ipNet.IP.To4() == nil {
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return "", false
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}
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ip := ipNet.IP.String()
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if isPrivateIPv4(ip) {
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return ip, true
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}
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return "", false
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}
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func isPrivateIPv4(ip string) bool {
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return strings.HasPrefix(ip, "10") ||
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strings.HasPrefix(ip, "172") ||
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strings.HasPrefix(ip, "192.168")
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}
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