/*	$OpenBSD$	*/

/*

 * Copyright (c) 2012 Eric Faurot <eric@openbsd.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.

 */

#include <event.h>

enum {

	IO_CONNECTED = 0, 	/* connection successful	*/

	IO_TLSREADY,		/* TLS started succesfully	*/

	IO_TLSVERIFIED,		/* XXX - needs more work	*/

	IO_DATAIN,		/* new data in input buffer	*/

	IO_LOWAT,		/* output queue running low	*/

	IO_DISCONNECTED,	/* error?			*/

	IO_TIMEOUT,		/* error?			*/

	IO_ERROR,		/* details?			*/

};

#define IO_READ			0x01

#define IO_WRITE		0x02

#define IO_RW			(IO_READ | IO_WRITE)

#define IO_PAUSE_IN		0x04

#define IO_PAUSE_OUT		0x08

#define IO_RESET		0x10  /* internal */

#define IO_HELD			0x20  /* internal */

struct iobuf;

struct io {

	int		 sock;

	void		*arg;

	void		(*cb)(struct io*, int);

	struct iobuf	*iobuf;

	size_t		 lowat;

	int		 timeout;

	int		 flags;

	int		 state;

	struct event	 ev;

	void		*ssl;

	const char	*error; /* only valid immediatly on callback */

};

void io_set_blocking(int, int);

void io_set_linger(int, int);

void io_init(struct io*, int, void*, void(*)(struct io*, int), struct iobuf*);

void io_clear(struct io*);

void io_set_read(struct io *);

void io_set_write(struct io *);

void io_set_timeout(struct io *, int);

void io_set_lowat(struct io *, size_t);

void io_pause(struct io *, int);

void io_resume(struct io *, int);

void io_reload(struct io *);

int io_connect(struct io *, const struct sockaddr *, const struct sockaddr *);

int io_start_tls(struct io *, void *);

const char* io_strio(struct io *);

const char* io_strevent(int);