/*      $OpenBSD: aucat.h,v 1.8 2019/07/05 22:53:47 ratchov Exp $       */
/*
 * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef AUCAT_H
#define AUCAT_H

#include "amsg.h"

struct aucat {
        int fd;                         /* socket */
        struct amsg rmsg, wmsg;         /* temporary messages */
        size_t wtodo, rtodo;            /* bytes to complete the packet */
#define RSTATE_MSG      0               /* message being received */
#define RSTATE_DATA     1               /* data being received */
        unsigned rstate;                /* one of above */
#define WSTATE_IDLE     2               /* nothing to do */
#define WSTATE_MSG      3               /* message being transferred */
#define WSTATE_DATA     4               /* data being transferred */
        unsigned wstate;                /* one of above */
        unsigned maxwrite;              /* bytes we're allowed to write */
};

int _aucat_rmsg(struct aucat *, int *);
int _aucat_wmsg(struct aucat *, int *);
size_t _aucat_rdata(struct aucat *, void *, size_t, int *);
size_t _aucat_wdata(struct aucat *, const void *, size_t, unsigned, int *);
int _aucat_open(struct aucat *, const char *, unsigned);
void _aucat_close(struct aucat *, int);
int _aucat_pollfd(struct aucat *, struct pollfd *, int);
int _aucat_revents(struct aucat *, struct pollfd *);
int _aucat_setfl(struct aucat *, int, int *);

#endif /* !defined(AUCAT_H) */