/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* proto.h: Protocol for client
- *
+ *
* Known contributors to this file:
* Dave Pare, 1986
*/
#ifndef PROTO_H
#define PROTO_H
-#define CLIENTPROTO 2 /* if new things are added, bump this */
+/*
+ * Protocol version.
+ * Bump this if the protocol changes in a way that is not backwards
+ * compatible. This breaks all existing clients. If you are tempted
+ * to do that, please consider using session options to make your
+ * change backwards compatible.
+ */
+#define CLIENTPROTO 2
-#define C_CMDOK 0x0
-#define C_DATA 0x1
-#define C_INIT 0x2
-#define C_EXIT 0x3
+#define C_CMDOK 0x0
+#define C_DATA 0x1
+#define C_INIT 0x2
+#define C_EXIT 0x3
#define C_FLUSH 0x4
-#define C_NOECHO 0x5
+#define C_NOECHO 0x5
#define C_PROMPT 0x6
-#define C_ABORT 0x7
+#define C_ABORT 0x7
#define C_REDIR 0x8
#define C_PIPE 0x9
-#define C_CMDERR 0xA
-#define C_BADCMD 0xB
+#define C_CMDERR 0xA
+#define C_BADCMD 0xB
#define C_EXECUTE 0xC
#define C_FLASH 0xD
-#define C_INFORM 0xE
-#define C_LAST 0xE
+#define C_INFORM 0xE
+#define C_LAST 0xE
#endif