version compat system start

client/handshake_packet.go

@@ -0,0 +1,26 @@
+package client
+
+import (
+	"net"
+	"strconv"
+
+	"github.com/admin-else/strom/proto"
+	"github.com/admin-else/strom/proto_base"
+	"github.com/admin-else/strom/proto_generated/v1_21_8"
+)
+
+func MakeHandshakePacket(s *proto.Conn, nextState proto_base.State) (p *v1_21_8.HandshakingToServerPacketSetProtocol, err error) {
+	p = &v1_21_8.HandshakingToServerPacketSetProtocol{NextState: int32(nextState), ProtocolVersion: s.ProtocolVersion}
+	var portStr string
+	p.ServerHost, portStr, err = net.SplitHostPort(s.RemoteAddr().String())
+	if err != nil {
+		return
+	}
+	var portUint uint64
+	portUint, err = strconv.ParseUint(portStr, 10, 16)
+	if err != nil {
+		return
+	}
+	p.ServerPort = uint16(portUint)
+	return
+}