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/* 
 * 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,v 1.1 2001/12/12 10:01:00 adam Exp $ 
 */ 
#ifndef __LWIP_API_H__ 
#define __LWIP_API_H__ 
 
#include "lwip/opt.h" 
#include "lwip/pbuf.h" 
#include "lwip/sys.h" 
 
#include "ipv4/lwip/ip.h" 
 
#include "lwip/udp.h" 
#include "lwip/tcp.h" 
 
#include "lwip/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; 
  union ip_addr *fromaddr; 
  u16_t 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, u16_t size); 
void              netbuf_free     (struct netbuf *buf); 
void              netbuf_ref      (struct netbuf *buf, 
				   void *dataptr, u16_t size); 
void              netbuf_chain    (struct netbuf *head, 
				   struct netbuf *tail); 
 
u16_t             netbuf_len      (struct netbuf *buf); 
err_t             netbuf_data     (struct netbuf *buf, 
				   void **dataptr, u16_t *len); 
s8_t              netbuf_next     (struct netbuf *buf); 
void              netbuf_first    (struct netbuf *buf); 
 
void              netbuf_copy     (struct netbuf *buf, 
				   void *dataptr, u16_t len); 
union ip_addr *  netbuf_fromaddr (struct netbuf *buf); 
u16_t             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, 
				   union ip_addr **addr, 
				   u16_t *port); 
err_t             netconn_addr    (struct netconn *conn, 
				   union ip_addr **addr, 
				   u16_t *port); 
err_t             netconn_bind    (struct netconn *conn, 
				   union ip_addr *addr, 
				   u16_t port); 
err_t             netconn_connect (struct netconn *conn, 
				   union ip_addr *addr, 
				   u16_t 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, u16_t size, 
				   u8_t copy); 
err_t             netconn_close   (struct netconn *conn); 
 
err_t             netconn_err     (struct netconn *conn); 
 
#endif /* __LWIP_API_H__ */