/*
 * Copyright (c) 2001, Swedish Institute of Computer Science.
 * 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 the name of the Institute 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 INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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. 
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 * $Id: api.h 54 2016-01-11 01:29:55Z reddawg $
 */
#ifndef __LWIP_API_H__
#define __LWIP_API_H__

#include "net/opt.h"
#include "net/pbuf.h"
#include "net/sys.h"

#include "net/ipv4/ip.h"

#include "net/udp.h"
#include "net/tcp.h"

#include "net/err.h"

#define NETCONN_NOCOPY 0x00
#define NETCONN_COPY   0x01

enum netconn_type {
  NETCONN_TCP,
  NETCONN_UDP,
  NETCONN_UDPLITE,
  NETCONN_UDPNOCHKSUM
};

enum netconn_state {
  NETCONN_NONE,
  NETCONN_WRITE,
  NETCONN_ACCEPT,
  NETCONN_RECV,
  NETCONN_CONNECT,
  NETCONN_CLOSE
};

struct netbuf {
  struct pbuf *p, *ptr;
  struct ip_addr *fromaddr;
  uInt16 fromport;
  err_t err;
};

struct netconn {
  enum netconn_type type;
  enum netconn_state state;
  union {
    struct tcp_pcb *tcp;
    struct udp_pcb *udp;
  } pcb;
  err_t err;
  sys_mbox_t mbox;
  sys_mbox_t recvmbox;
  sys_mbox_t acceptmbox;
  sys_sem_t sem;
};

/* Network buffer functions: */
struct netbuf *   netbuf_new      (void);
void              netbuf_delete   (struct netbuf *buf);
void *            netbuf_alloc    (struct netbuf *buf, uInt16 size);
void              netbuf_free     (struct netbuf *buf);
void              netbuf_ref      (struct netbuf *buf,
				   void *dataptr, uInt16 size);
void              netbuf_chain    (struct netbuf *head,
				   struct netbuf *tail);

uInt16             netbuf_len      (struct netbuf *buf);
err_t             netbuf_data     (struct netbuf *buf,
				   void **dataptr, uInt16 *len);
Int8              netbuf_next     (struct netbuf *buf);
void              netbuf_first    (struct netbuf *buf);

void              netbuf_copy     (struct netbuf *buf,
				   void *dataptr, uInt16 len);
struct ip_addr *  netbuf_fromaddr (struct netbuf *buf);
uInt16             netbuf_fromport (struct netbuf *buf);

/* Network connection functions: */
struct netconn *  netconn_new     (enum netconn_type type);
err_t             netconn_delete  (struct netconn *conn);
enum netconn_type netconn_type    (struct netconn *conn);
err_t             netconn_peer    (struct netconn *conn,
				   struct ip_addr **addr,
				   uInt16 *port);
err_t             netconn_addr    (struct netconn *conn,
				   struct ip_addr **addr,
				   uInt16 *port);
err_t             netconn_bind    (struct netconn *conn,
				   struct ip_addr *addr,
				   uInt16 port);
err_t             netconn_connect (struct netconn *conn,
				   struct ip_addr *addr,
				   uInt16 port);
err_t             netconn_listen  (struct netconn *conn);
struct netconn *  netconn_accept  (struct netconn *conn);
struct netbuf *   netconn_recv    (struct netconn *conn);
err_t             netconn_send    (struct netconn *conn,
				   struct netbuf *buf);
err_t             netconn_write   (struct netconn *conn,
				   void *dataptr, uInt16 size,
				   uInt8 copy);
err_t             netconn_close   (struct netconn *conn);

err_t             netconn_err     (struct netconn *conn);

void netbuf_copy_partial(struct netbuf *buf, void *dataptr, uInt16 len, uInt16 offset);

#endif /* __LWIP_API_H__ */