/*
 * include/proto/stream_interface.h
 * This file contains stream_interface function prototypes
 *
 * Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, version 2.1
 * exclusively.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef _PROTO_STREAM_INTERFACE_H
#define _PROTO_STREAM_INTERFACE_H

#include <stdlib.h>

#include <common/config.h>
#include <types/session.h>
#include <types/stream_interface.h>
#include <proto/connection.h>


/* main event functions used to move data between sockets and buffers */
int stream_int_check_timeouts(struct stream_interface *si);
void stream_int_report_error(struct stream_interface *si);
void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg);
int conn_si_send_proxy(struct connection *conn, unsigned int flag);
void conn_notify_si(struct connection *conn);
void stream_int_update_conn(struct stream_interface *si);
int stream_int_shutr(struct stream_interface *si);
int stream_int_shutw(struct stream_interface *si);
void stream_int_chk_rcv_conn(struct stream_interface *si);
void stream_int_chk_snd_conn(struct stream_interface *si);
void si_conn_send_cb(struct connection *conn);

extern struct sock_ops stream_int_embedded;
extern struct sock_ops stream_int_task;

struct task *stream_int_register_handler(struct stream_interface *si,
					 struct si_applet *app);
struct task *stream_int_register_handler_task(struct stream_interface *si,
					      struct task *(*fct)(struct task *));
void stream_int_unregister_handler(struct stream_interface *si);

static inline const struct protocol *si_ctrl(struct stream_interface *si)
{
	return si->conn.ctrl;
}

static inline const struct sock_ops *si_data(struct stream_interface *si)
{
	return si->conn.data;
}

static inline int si_fd(struct stream_interface *si)
{
	return si->conn.t.sock.fd;
}

static inline void clear_target(struct target *dest)
{
	dest->type = TARG_TYPE_NONE;
	dest->ptr.v = NULL;
}

static inline void set_target_client(struct target *dest, struct listener *l)
{
	dest->type = TARG_TYPE_CLIENT;
	dest->ptr.l = l;
}

static inline void set_target_server(struct target *dest, struct server *s)
{
	dest->type = TARG_TYPE_SERVER;
	dest->ptr.s = s;
}

static inline void set_target_proxy(struct target *dest, struct proxy *p)
{
	dest->type = TARG_TYPE_PROXY;
	dest->ptr.p = p;
}

static inline void set_target_applet(struct target *dest, struct si_applet *a)
{
	dest->type = TARG_TYPE_APPLET;
	dest->ptr.a = a;
}

static inline void set_target_task(struct target *dest, struct task *t)
{
	dest->type = TARG_TYPE_TASK;
	dest->ptr.t = t;
}

static inline struct target *copy_target(struct target *dest, struct target *src)
{
	*dest = *src;
	return dest;
}

static inline int target_match(struct target *a, struct target *b)
{
	return a->type == b->type && a->ptr.v == b->ptr.v;
}

static inline struct server *target_srv(struct target *t)
{
	if (!t || t->type != TARG_TYPE_SERVER)
		return NULL;
	return t->ptr.s;
}

static inline struct listener *target_client(struct target *t)
{
	if (!t || t->type != TARG_TYPE_CLIENT)
		return NULL;
	return t->ptr.l;
}

static inline void stream_interface_prepare(struct stream_interface *si, const struct sock_ops *ops)
{
	si->conn.data = ops;
	si->conn.data_st = 0;
	si->conn.data_ctx = NULL;
}


/* Retrieves the source address for the stream interface. */
static inline void si_get_from_addr(struct stream_interface *si)
{
	if (si->flags & SI_FL_FROM_SET)
		return;

	if (!si_ctrl(si) || !si_ctrl(si)->get_src)
		return;

	if (si_ctrl(si)->get_src(si_fd(si), (struct sockaddr *)&si->addr.from,
	                         sizeof(si->addr.from),
	                         si->target.type != TARG_TYPE_CLIENT) == -1)
		return;
	si->flags |= SI_FL_FROM_SET;
}

/* Retrieves the original destination address for the stream interface. */
static inline void si_get_to_addr(struct stream_interface *si)
{
	if (si->flags & SI_FL_TO_SET)
		return;

	if (!si_ctrl(si) || !si_ctrl(si)->get_dst)
		return;

	if (si_ctrl(si)->get_dst(si_fd(si), (struct sockaddr *)&si->addr.to,
	                         sizeof(si->addr.to),
	                         si->target.type != TARG_TYPE_CLIENT) == -1)
		return;
	si->flags |= SI_FL_TO_SET;
}

/* Sends a shutr to the connection using the data layer */
static inline void si_shutr(struct stream_interface *si)
{
	if (stream_int_shutr(si))
		conn_data_stop_recv(&si->conn);
}

/* Sends a shutw to the connection using the data layer */
static inline void si_shutw(struct stream_interface *si)
{
	if (stream_int_shutw(si))
		conn_data_stop_send(&si->conn);
}

/* Calls the data state update on the stream interfaace */
static inline void si_update(struct stream_interface *si)
{
	si_data(si)->update(si);
}

/* Calls chk_rcv on the connection using the data layer */
static inline void si_chk_rcv(struct stream_interface *si)
{
	si_data(si)->chk_rcv(si);
}

/* Calls chk_snd on the connection using the data layer */
static inline void si_chk_snd(struct stream_interface *si)
{
	si_data(si)->chk_snd(si);
}

/* Calls chk_snd on the connection using the ctrl layer */
static inline int si_connect(struct stream_interface *si)
{
	if (unlikely(!si_ctrl(si) || !si_ctrl(si)->connect))
		return SN_ERR_INTERNAL;
	return si_ctrl(si)->connect(si);
}

#endif /* _PROTO_STREAM_INTERFACE_H */

/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 * End:
 */