Added initial IPX support

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1668

include/ipxserver.h

@@ -0,0 +1,49 @@
+/*
+ *  Copyright (C) 2002  The DOSBox Team
+ *
+ *  This program 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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library 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.
+ */
+
+#ifndef _IPXSERVER_H_
+#define _IPXSERVER_H_
+
+#if C_IPX
+
+#include "SDL_net.h"
+
+struct packetBuffer {
+	Bit8u buffer[1024];
+	Bit16s packetSize;  // Packet size remaining in read
+	Bit16s packetRead;  // Bytes read of total packet
+	bool inPacket;      // In packet reception flag
+	bool connected;		// Connected flag
+	bool waitsize;
+};
+
+#define SOCKETTABLESIZE 16
+#define IPXBUFFERSIZE 1024
+#define CONVIP(hostvar) hostvar & 0xff, (hostvar >> 8) & 0xff, (hostvar >> 16) & 0xff, (hostvar >> 24) & 0xff
+#define CONVIPX(hostvar) hostvar[0], hostvar[1], hostvar[2], hostvar[3], hostvar[4], hostvar[5]
+
+
+void IPX_StopServer();
+bool IPX_StartServer(Bit16u portnum);
+bool IPX_isConnectedToServer(Bits tableNum, IPaddress ** ptrAddr);
+
+Bit8u packetCRC(Bit8u *buffer, Bit16u bufSize);
+
+#endif
+
+#endif