feat: fix outbound

extras/outbounds/utils.go

@@ -0,0 +1,24 @@
+package outbounds
+
+import "net"
+
+// splitIPv4IPv6 gets the first IPv4 and IPv6 address from a list of IP addresses.
+// Both of the return values can be nil when no IPv4 or IPv6 address is found.
+func splitIPv4IPv6(ips []net.IP) (ipv4, ipv6 net.IP) {
+	for _, ip := range ips {
+		if ip.To4() != nil {
+			if ipv4 == nil {
+				ipv4 = ip
+			}
+		} else {
+			if ipv6 == nil {
+				ipv6 = ip
+			}
+		}
+		if ipv4 != nil && ipv6 != nil {
+			// We have everything we need.
+			break
+		}
+	}
+	return
+}