/*	$CoreSDI: packet.h,v 1.11 2001/08/30 21:33:13 claudio Exp $	*/

/*
 *   Copyright (c) 2000, 2001, Core SDI S.A., Argentina
 *   All rights reserved
 *  
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *  
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *   3. Neither name of the Core SDI S.A. nor the names of its contributors
 *      may be used to endorse or promote products derived from this software
 *      without specific prior written permission.
 *  
 *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *   THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef PACKET_H
#define PACKET_H

#include "buffer.h"

typedef struct _packet {
        BUFFER *pkt_rbuf;               /* Reading buffer		*/
        BUFFER *pkt_wbuf;               /* Writing buffer		*/
        BUFFER *pkt_zbuf;               /* Compress/decompress buffer	*/
        BUFFER *pkt_cbuf;               /* Encrypt/decrypt buffer	*/
 
        const EVP_CIPHER *pkt_cipher;	/* Cipher type			*/
        unsigned char pkt_key[EVP_MAX_KEY_LENGTH];
					/* Session key			*/
#ifndef WIN32
        int	 pkt_infd,		/* Input descriptor		*/
                 pkt_outfd;		/* Output descriptor		*/
#else
	SOCKET	 pkt_infd,
		 pkt_outfd;
#endif /* WIN32 */
} PACKET;

void		init_cryptostrings();
void		release_cryptostrings();

PACKET *	packet_init (int, int);
int		packet_init_encrypt (PACKET *, const EVP_CIPHER *,
				     unsigned char *, ssize_t);
void		packet_release (PACKET *);
void		packet_flush (PACKET *);

void		packet_put_raw (PACKET *, const void *, ssize_t);
void		packet_put_int32 (PACKET *, int32_t);
void		packet_put_string (PACKET *, const char *);

void		packet_get_raw (PACKET *, void *, ssize_t);
void		packet_get_int32 (PACKET *, int32_t *);
void		packet_get_string (PACKET *, char *, ssize_t);

off_t		packet_write (PACKET *, int, off_t);
void		packet_read (PACKET *, int);

in_addr_t	resolve (char *);

#endif /* PACKET_H */