/*! \file   include/rap.h
    \brief  robos ad-hoc protocol
    \author Eric B. Decker <cire@deckerstone.net, cire@soe.ucsc.edu>

    $Id: rap.h,v 1.8 2004/03/02 21:37:46 luca Exp $ 
*/

/*
 *  The contents of this file are subject to the Mozilla Public License
 *  Version 1.0 (the "License"); you may not use this file except in
 *  compliance with the License. You may obtain a copy of the License at
 *  http://www.mozilla.org/MPL/
 *
 *  Software distributed under the License is distributed on an "AS IS"
 *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 *  License for the specific language governing rights and limitations
 *  under the License.
 *
 *  Original Code: RAP code, released February 16, 2004
 *
 *  The Initial Developer of the Original Code is Eric B. Decker
 *  Portions created by Eric B. Decker are Copyright (C) 2004
 *  Eric B. Decker, All Rights Reserved.
 *
 *  Contributor(s): Eric B. Decker <cire@deckerstone.net, cire@soe.ucsc.edu>
 *  Contributor(s): Luca de Alfaro <luca@soe.ucsc.edu> 
 */

#ifndef __rap_h__
#define __rap_h__

/*
  This header does not check for CONF_RAP because it is used by both
  the legos/ROBOS side as well as on the Unix/Linux side.
*/

typedef struct {
  unsigned char len;     // Len 
  unsigned char data[0]; // List 
} rap_list_t;


typedef struct {
  unsigned char dtype;   // Upper layer type.  Not used. 
  unsigned char dlen;    // Length of data to upper layer. 
  unsigned char data[0]; // Data for upper layer. 
} rap_data_t;


// Structure to interpret packets
typedef struct {
  unsigned char len;	// length of packet (total)
  unsigned char ptype;  // packet type 
  unsigned char dst;    // destination
  unsigned char src;    // source
  unsigned char nonce;  // nonce
  unsigned char sr_ptr; // next hop (pointer in source route) 
  rap_list_t    sr;     // source route 
} rap_pkt_t;

// Packet types 
typedef enum {
    PTYPE_RR = 1,		/* Route Request */
    PTYPE_RP = 2,		/* Route Reply */
    PTYPE_RC = 3,		/* Route Confirm */
    PTYPE_AK = 4,		/* Network ACK */
    PTYPE_DT = 5		/* Data  */
} rap_ptype_t;

#define HEADER_LEN 6    // Length of the header, to compute where to
			// put lists.

#endif /* _rap_h_ */

// $Log: rap.h,v $
// Revision 1.8  2004/03/02 21:37:46  luca
// fixed [0] for struct declarations
//
// Revision 1.7  2004/03/01 07:13:35  luca
// Added HEADER_LEN for convenience.
//
// Revision 1.6  2004/03/01 06:36:56  luca
// Changed the names of some fields (and corresponding defines)
//
// Revision 1.5  2004/03/01 02:31:26  luca
// Added a log.
//
// Revision 1.4  2004/03/01 02:31:06  luca
// Modified the content of upper-layer data, to include a length.
//