version compat system

client/dns.go

@@ -2,6 +2,7 @@ package client
 
 import (
 	"net"
+	"strconv"
 	"strings"
 )
 
@@ -20,3 +21,20 @@ func LookupMinecraftSRV(host string, port uint16) (hostRet string, portRet uint1
 	portRet = srvs[0].Port
 	return
 }
+
+func DoDNS(in string) (out string, err error) { // Bad code should match minecraft
+	// https://mcsrc.dev/1/26.1-pre-1/net/minecraft/client/multiplayer/resolver/ServerAddress#L34
+	host, port, _ := net.SplitHostPort(in)
+	var portN uint16 = 25565
+	if port != "" {
+		var porti int
+		porti, err = strconv.Atoi(port)
+		if err != nil {
+			return
+		}
+		portN = uint16(porti)
+	}
+	host, portN = LookupMinecraftSRV(host, portN)
+	out = net.JoinHostPort(host, strconv.Itoa(int(portN)))
+	return
+}