Multiplayer protocol: Difference between revisions

Multiplayer protocol (view source)

265 bytes added , 24 May 2012

Describe the byte sent as 4byte bug in the multiplayer protocol

33

edits

@@ Line 101: / Line 101: @@
 The following properties are transmitted, but not necessarily all present and not in this order:
+'''Important:''' This table is outdated. Please have a look in the flightgear sources at src/MultiPlayer/multiplaymgr.cxx
 {| class="prettytable" border="1px" cellspacing="0" cellpadding="2"
 !ID  !!  Property                                                      || Type(*)
@@ Line 418: / Line 420: @@
   BOOL:  4 bytes, send unconditionally
-  STRING [LEN|STR|PAD]: send only when length > 0
+  STRING [LEN|STR|PAD]:
-  LEN:    4 bytes, length of the string
+  LEN:    4 bytes, length of the decoded string
-  STR:    n bytes, string string itself
+  STR:    LEN*4 bytes, encoded string.
-  PAD:    n bytes, padding so the overall length is a multiple of 4
+  PAD:    n*4 bytes, padding.
+'''Important'''
+Due to a bug, all bytes in the STRING field are sent as 4byte ints (not in the header or the position message). So STR has length LEN*4 and padding (4-LEN%4)*4 bytes, if LEN%4 != 0.
 [[Category:Multiplayer]]