//  proj/minimal/lwipopts.h

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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: lwipopts.h,v 1.6 2002/05/07 12:45:23 adam Exp $
  */
 #ifndef __LWIPOPTS_H__
 #define __LWIPOPTS_H__

 #define NO_SYS 1
// #define LWIP_EVENT_API 1
 #define MEMP_RECLAIM 1
 #define MEM_RECLAIM 1
 #define LWIP_CALLBACK_API
 /* ---------- Memory options ---------- */
 /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
    lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
    byte alignment -> define MEM_ALIGNMENT to 2. */
 #define MEM_ALIGNMENT           2

 /* MEM_SIZE: the size of the heap memory. If the application will send
 a lot of data that needs to be copied, this should be set high. */
 #define MEM_SIZE                10000

 /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
    sends a lot of data out of ROM (or other static memory), this
    should be set high. */
 #define MEMP_NUM_PBUF           20
 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
    per active UDP "connection". */
 #define MEMP_NUM_UDP_PCB        0
 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
    connections. */
 #define MEMP_NUM_TCP_PCB        20
 /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
    connections. */
 #define MEMP_NUM_TCP_PCB_LISTEN 5
 /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
    segments. */
 #define MEMP_NUM_TCP_SEG        10

 /* The following four are used only with the sequential API and can be
    set to 0 if the application only will use the raw API. */
 /* MEMP_NUM_NETBUF: the number of struct netbufs. */
 #define MEMP_NUM_NETBUF         0
 /* MEMP_NUM_NETCONN: the number of struct netconns. */
 #define MEMP_NUM_NETCONN        0
 /* MEMP_NUM_APIMSG: the number of struct api_msg, used for
    communication between the TCP/IP stack and the sequential
    programs. */
 #define MEMP_NUM_API_MSG        0
 /* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
    for sequential API communication and incoming packets. Used in
    src/api/tcpip.c. */
 #define MEMP_NUM_TCPIP_MSG      0
 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
    timeouts. */
 #define MEMP_NUM_SYS_TIMEOUT    0

 /* ---------- Pbuf options ---------- */
 /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
 #define PBUF_POOL_SIZE          30

 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
 #define PBUF_POOL_BUFSIZE       256

 /* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
    link level header. */
 #define PBUF_LINK_HLEN          14

 /* ---------- TCP options ---------- */
 #define LWIP_TCP                1
 #define TCP_TTL                 255

 /* Controls if TCP should queue segments that arrive out of
    order. Define to 0 if your device is low on memory. */
 #define TCP_QUEUE_OOSEQ         0

 /* TCP Maximum segment size. */
 #define TCP_MSS                 128

 /* TCP sender buffer space (bytes). */
 #define TCP_SND_BUF             128

 /* TCP sender buffer space (pbufs). This must be at least = 2 *
    TCP_SND_BUF/TCP_MSS for things to work. */
 #define TCP_SND_QUEUELEN        4 * TCP_SND_BUF/TCP_MSS

 /* TCP receive window. */
 #define TCP_WND                 128

 /* Maximum number of retransmissions of data segments. */
 #define TCP_MAXRTX              12

 /* Maximum number of retransmissions of SYN segments. */
 #define TCP_SYNMAXRTX           4

 /* ---------- ARP options ---------- */
 #define ARP_TABLE_SIZE 10

 /* ---------- IP options ---------- */
 /* Define IP_FORWARD to 1 if you wish to have the ability to forward
    IP packets across network interfaces. If you are going to run lwIP
    on a device with only one network interface, define this to 0. */
 #define IP_FORWARD              0

 /* If defined to 1, IP options are allowed (but not parsed). If
    defined to 0, all packets with IP options are dropped. */
 #define IP_OPTIONS              0

 /* ---------- ICMP options ---------- */
 #define ICMP_TTL                255


 /* ---------- DHCP options ---------- */
 /* Define LWIP_DHCP to 1 if you want DHCP configuration of
    interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
    turning this on does currently not work. */
 #define LWIP_DHCP               0

 /* 1 if you want to do an ARP check on the offered address
    (recommended). */
 #define DHCP_DOES_ARP_CHECK     1

 /* ---------- UDP options ---------- */
 #define LWIP_UDP                1
 #define UDP_TTL                 255


 /* ---------- Statistics options ---------- */
 #define STATS

 #ifdef STATS
 #define LINK_STATS
 #define IP_STATS
 #define ICMP_STATS
 #define UDP_STATS
 #define TCP_STATS
 #define MEM_STATS
 #define MEMP_STATS
 #define PBUF_STATS
 #define SYS_STATS
 #endif /* STATS */

 #endif /* __LWIPOPTS_H__ */




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