/*
 * Copyright (c) 2001-2003 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
 *
 */
#ifndef __LWIPOPTS_H__
#define __LWIPOPTS_H__

#define NO_SYS 0
/*#define LWIP_EVENT_API 0*/

/* ---------- 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           4

/* 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                65000

/* 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           16
/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
   per active UDP "connection". */
#define MEMP_NUM_UDP_PCB        4
/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
   connections. */
#define MEMP_NUM_TCP_PCB        5
/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
   connections. */
#define MEMP_NUM_TCP_PCB_LISTEN 8
/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
   segments. */
#define MEMP_NUM_TCP_SEG        16

/* 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         6
/* MEMP_NUM_NETCONN: the number of struct netconns. */
#define MEMP_NUM_NETCONN        10
/* MEMP_NUM_TCPIP_MSG: 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_API   16
#define MEMP_NUM_TCPIP_MSG_INPKT 16
/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
   timeouts. */
#define MEMP_NUM_SYS_TIMEOUT    3

/* These two control is reclaimer functions should be compiled
   in. Should always be turned on (1). */
#define MEM_RECLAIM             1
#define MEMP_RECLAIM            1

/* ---------- Pbuf options ---------- */
/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
#define PBUF_POOL_SIZE          128

/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
#define PBUF_POOL_BUFSIZE       1024

/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
   link level header. */
#define PBUF_LINK_HLEN          16

/** SYS_LIGHTWEIGHT_PROT
 * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
 * for certain critical regions during buffer allocation, deallocation and memory
 * allocation and deallocation.
 */
#define SYS_LIGHTWEIGHT_PROT           1

/* ---------- 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         1

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

/* TCP sender buffer space (bytes). */
#define TCP_SND_BUF             256

/* 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                 1024

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

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

/* TCP writable space (bytes). This must be less than or equal
   to TCP_SND_BUF. It is the amount of space which must be
   available in the tcp snd_buf for select to return writable */
#define TCP_SNDLOWAT            TCP_SND_BUF/2

/* ---------- ARP options ---------- */
#define ARP_TABLE_SIZE 10
#define ARP_QUEUEING 1

/* ---------- 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              1

/* IP reassembly and segmentation.These are orthogonal even
 * if they both deal with IP fragments */
#define IP_REASSEMBLY     1
#define IP_FRAG           1

/* ---------- 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 LWIP_STATS 1

#ifdef LWIP_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 */


#define LWIP_COMPAT_SOCKETS 1
#define LWIP_PROVIDE_ERRNO 1

/* People often make a mistake on the priority of their communications task.
   The TCP/IP stack should be at a relatively low priority if it is an endpoint
   (not a router) on a somewhat underpowered CPU. You are'nt going to keep up
   with network traffic during a denial of service attack or misconfigured network
   and you don't want an overburdened network task to cause other important tasks
   (including your UI) to stop working. Drop packets! It forces flow control and
   lets the rest of your system run.
*/
#define TCPIP_THREAD_PRIO 220         // Relatively low priority

#define DEFAULT_THREAD_PRIO 240

#endif /* __LWIPOPTS_H__ */
