Add version fields for debugger configuration

By adding version information to the debugger protocol
it is possible to report if the debugger client and server
have different expectations on debugger workings (opcodes, types, etc.).

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

jerry-debugger/jerry-client-ws.py

@@ -25,6 +25,9 @@ import socket
 import struct
 import sys
 
+# Expected debugger protocol version.
+JERRY_DEBUGGER_VERSION = 1
+
 # Messages sent by the server to client.
 JERRY_DEBUGGER_CONFIGURATION = 1
 JERRY_DEBUGGER_PARSE_ERROR = 2
@@ -563,13 +566,14 @@ class JerryDebugger(object):
         else:
             result = b""
 
-        len_expected = 6
+        len_expected = 7
         # Network configurations, which has the following struct:
         # header [2] - opcode[1], size[1]
         # type [1]
         # max_message_size [1]
         # cpointer_size [1]
         # little_endian [1]
+        # version [1]
 
         while len(result) < len_expected:
             result += self.client_socket.recv(1024)
@@ -578,7 +582,7 @@ class JerryDebugger(object):
 
         expected = struct.pack("BBB",
                                WEBSOCKET_BINARY_FRAME | WEBSOCKET_FIN_BIT,
-                               4,
+                               5,
                                JERRY_DEBUGGER_CONFIGURATION)
 
         if result[0:3] != expected:
@@ -587,6 +591,12 @@ class JerryDebugger(object):
         self.max_message_size = ord(result[3])
         self.cp_size = ord(result[4])
         self.little_endian = ord(result[5])
+        self.version = ord(result[6])
+
+        if self.version != JERRY_DEBUGGER_VERSION:
+            raise Exception("Incorrect debugger version from target: %d expected: %d" %
+                            (self.version, JERRY_DEBUGGER_VERSION))
+
 
         if self.little_endian:
             self.byte_order = "<"