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/*

 * Copyright (c) 2001-2004 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 __LWIP_OPT_H__

#define __LWIP_OPT_H__

/* Include user defined options first */

#include "lwipopts.h"

#include "lwip/debug.h"

/* Define default values for unconfigured parameters. */

/* Platform specific locking */

/*

 * enable 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.

 */

#ifndef SYS_LIGHTWEIGHT_PROT

#define SYS_LIGHTWEIGHT_PROT            0

#endif

#ifndef NO_SYS

#define NO_SYS                          0

#endif

/* ---------- 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. */

#ifndef MEM_ALIGNMENT

#define MEM_ALIGNMENT                   1

#endif

/* 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. */

#ifndef MEM_SIZE

#define MEM_SIZE                        1600

#endif

#ifndef MEMP_SANITY_CHECK

#define MEMP_SANITY_CHECK               0

#endif

/* 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. */

#ifndef MEMP_NUM_PBUF

#define MEMP_NUM_PBUF                   16

#endif

/* Number of raw connection PCBs */

#ifndef MEMP_NUM_RAW_PCB

#define MEMP_NUM_RAW_PCB                4

#endif

/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One

   per active UDP "connection". */

#ifndef MEMP_NUM_UDP_PCB

#define MEMP_NUM_UDP_PCB                4

#endif

/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP

   connections. */

#ifndef MEMP_NUM_TCP_PCB

#define MEMP_NUM_TCP_PCB                5

#endif

/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP

   connections. */

#ifndef MEMP_NUM_TCP_PCB_LISTEN

#define MEMP_NUM_TCP_PCB_LISTEN         8

#endif

/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP

   segments. */

#ifndef MEMP_NUM_TCP_SEG

#define MEMP_NUM_TCP_SEG                16

#endif

/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active

   timeouts. */

#ifndef MEMP_NUM_SYS_TIMEOUT

#define MEMP_NUM_SYS_TIMEOUT            3

#endif

/* 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. */

#ifndef MEMP_NUM_NETBUF

#define MEMP_NUM_NETBUF                 2

#endif

/* MEMP_NUM_NETCONN: the number of struct netconns. */

#ifndef MEMP_NUM_NETCONN

#define MEMP_NUM_NETCONN                4

#endif

/* MEMP_NUM_APIMSG: the number of struct api_msg, used for

   communication between the TCP/IP stack and the sequential

   programs. */

#ifndef MEMP_NUM_API_MSG

#define MEMP_NUM_API_MSG                8

#endif

/* 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. */

#ifndef MEMP_NUM_TCPIP_MSG

#define MEMP_NUM_TCPIP_MSG              8

#endif

/* ---------- Pbuf options ---------- */

/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */

#ifndef PBUF_POOL_SIZE

#define PBUF_POOL_SIZE                  16

#endif

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

#ifndef PBUF_POOL_BUFSIZE

#define PBUF_POOL_BUFSIZE               128

#endif

/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a

   link level header. Defaults to 14 for Ethernet. */

#ifndef PBUF_LINK_HLEN

#define PBUF_LINK_HLEN                  14

#endif

/* ---------- ARP options ---------- */

/** Number of active hardware address, IP address pairs cached */

#ifndef ARP_TABLE_SIZE

#define ARP_TABLE_SIZE                  10

#endif

/**

 * If enabled, outgoing packets are queued during hardware address

 * resolution.

 *

 * This feature has not stabilized yet. Single-packet queueing is

 * believed to be stable, multi-packet queueing is believed to

 * clash with the TCP segment queueing.

 *

 * As multi-packet-queueing is currently disabled, enabling this

 * _should_ work, but we need your testing feedback on lwip-users.

 *

 */

#ifndef ARP_QUEUEING

#define ARP_QUEUEING                    1

#endif

/* This option is deprecated */

#ifdef ETHARP_QUEUE_FIRST

#error ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h.

#endif

/* This option is removed to comply with the ARP standard */

#ifdef ETHARP_ALWAYS_INSERT

#error ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h.

#endif

/* ---------- 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. */

#ifndef IP_FORWARD

#define IP_FORWARD                      0

#endif

/* If defined to 1, IP options are allowed (but not parsed). If

   defined to 0, all packets with IP options are dropped. */

#ifndef IP_OPTIONS

#define IP_OPTIONS                      1

#endif

/** IP reassembly and segmentation. Even if they both deal with IP

 *  fragments, note that these are orthogonal, one dealing with incoming

 *  packets, the other with outgoing packets

 */

/** Reassemble incoming fragmented IP packets */

#ifndef IP_REASSEMBLY

#define IP_REASSEMBLY                   1

#endif

/** Fragment outgoing IP packets if their size exceeds MTU */

#ifndef IP_FRAG

#define IP_FRAG                         1

#endif

/* ---------- ICMP options ---------- */

#ifndef ICMP_TTL

#define ICMP_TTL                        255

#endif

/* ---------- RAW options ---------- */

#ifndef LWIP_RAW

#define LWIP_RAW                        1

#endif

#ifndef RAW_TTL

#define RAW_TTL                        255

#endif

/* ---------- DHCP options ---------- */

#ifndef LWIP_DHCP

#define LWIP_DHCP                       0

#endif

/* 1 if you want to do an ARP check on the offered address

   (recommended). */

#ifndef DHCP_DOES_ARP_CHECK

#define DHCP_DOES_ARP_CHECK             1

#endif

/* ---------- UDP options ---------- */

#ifndef LWIP_UDP

#define LWIP_UDP                        1

#endif

#ifndef UDP_TTL

#define UDP_TTL                         255

#endif

/* ---------- TCP options ---------- */

#ifndef LWIP_TCP

#define LWIP_TCP                        1

#endif

#ifndef TCP_TTL

#define TCP_TTL                         255

#endif

#ifndef TCP_WND

#define TCP_WND                         2048

#endif 

#ifndef TCP_MAXRTX

#define TCP_MAXRTX                      12

#endif

#ifndef TCP_SYNMAXRTX

#define TCP_SYNMAXRTX                   6

#endif

/* Controls if TCP should queue segments that arrive out of

   order. Define to 0 if your device is low on memory. */

#ifndef TCP_QUEUE_OOSEQ

#define TCP_QUEUE_OOSEQ                 1

#endif

/* TCP Maximum segment size. */

#ifndef TCP_MSS

#define TCP_MSS                         128 /* A *very* conservative default. */

#endif

/* TCP sender buffer space (bytes). */

#ifndef TCP_SND_BUF

#define TCP_SND_BUF                     256

#endif

/* TCP sender buffer space (pbufs). This must be at least = 2 *

   TCP_SND_BUF/TCP_MSS for things to work. */

#ifndef TCP_SND_QUEUELEN

#define TCP_SND_QUEUELEN                4 * TCP_SND_BUF/TCP_MSS

#endif

/* Maximum number of retransmissions of data segments. */

/* Maximum number of retransmissions of SYN segments. */

/* 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 */

#ifndef TCP_SNDLOWAT

#define TCP_SNDLOWAT                    TCP_SND_BUF/2

#endif

/* Support loop interface (127.0.0.1) */

#ifndef LWIP_HAVE_LOOPIF

#define LWIP_HAVE_LOOPIF                1

#endif

#ifndef LWIP_EVENT_API

#define LWIP_EVENT_API                  0

#define LWIP_CALLBACK_API               1

#else 

#define LWIP_EVENT_API                  1

#define LWIP_CALLBACK_API               0

#endif 

#ifndef LWIP_COMPAT_SOCKETS

#define LWIP_COMPAT_SOCKETS             1

#endif

#ifndef TCPIP_THREAD_PRIO

#define TCPIP_THREAD_PRIO               1

#endif

#ifndef SLIPIF_THREAD_PRIO

#define SLIPIF_THREAD_PRIO              1

#endif

#ifndef PPP_THREAD_PRIO

#define PPP_THREAD_PRIO                 1

#endif

#ifndef DEFAULT_THREAD_PRIO

#define DEFAULT_THREAD_PRIO             1

#endif

/* ---------- Socket Options ---------- */

/* Enable SO_REUSEADDR and SO_REUSEPORT options */

#ifndef SO_REUSE

# define SO_REUSE 0

#endif                                                                        

/* ---------- Statistics options ---------- */

#ifndef LWIP_STATS

#define LWIP_STATS                      1

#endif

#if LWIP_STATS

#ifndef LWIP_STATS_DISPLAY

#define LWIP_STATS_DISPLAY 0

#endif

#ifndef LINK_STATS

#define LINK_STATS      1

#endif

#ifndef IP_STATS

#define IP_STATS        1

#endif

#ifndef IPFRAG_STATS

#define IPFRAG_STATS    1

#endif

#ifndef ICMP_STATS

#define ICMP_STATS      1

#endif

#ifndef UDP_STATS

#define UDP_STATS       1

#endif

#ifndef TCP_STATS

#define TCP_STATS       1

#endif

#ifndef MEM_STATS

#define MEM_STATS       1

#endif

#ifndef MEMP_STATS

#define MEMP_STATS      1

#endif

#ifndef PBUF_STATS

#define PBUF_STATS      1

#endif

#ifndef SYS_STATS

#define SYS_STATS       1

#endif

#ifndef RAW_STATS

#define RAW_STATS       0

#endif

#else

#define LINK_STATS      0

#define IP_STATS        0

#define IPFRAG_STATS    0

#define ICMP_STATS      0

#define UDP_STATS       0

#define TCP_STATS       0

#define MEM_STATS       0

#define MEMP_STATS      0

#define PBUF_STATS      0

#define SYS_STATS       0

#define RAW_STATS       0

#define LWIP_STATS_DISPLAY      0

#endif /* LWIP_STATS */

/* ---------- PPP options ---------- */

#ifndef PPP_SUPPORT

#define PPP_SUPPORT                     0      /* Set for PPP */

#endif

#if PPP_SUPPORT 

#define NUM_PPP                         1      /* Max PPP sessions. */

#ifndef PAP_SUPPORT

#define PAP_SUPPORT                     0      /* Set for PAP. */

#endif

#ifndef CHAP_SUPPORT

#define CHAP_SUPPORT                    0      /* Set for CHAP. */

#endif

#define MSCHAP_SUPPORT                  0      /* Set for MSCHAP (NOT FUNCTIONAL!) */

#define CBCP_SUPPORT                    0      /* Set for CBCP (NOT FUNCTIONAL!) */

#define CCP_SUPPORT                     0      /* Set for CCP (NOT FUNCTIONAL!) */

#ifndef VJ_SUPPORT

#define VJ_SUPPORT                      0      /* Set for VJ header compression. */

#endif

#ifndef MD5_SUPPORT

#define MD5_SUPPORT                     0      /* Set for MD5 (see also CHAP) */

#endif

/*

 * Timeouts.

 */

#define FSM_DEFTIMEOUT                  6       /* Timeout time in seconds */

#define FSM_DEFMAXTERMREQS              2       /* Maximum Terminate-Request transmissions */

#define FSM_DEFMAXCONFREQS              10      /* Maximum Configure-Request transmissions */

#define FSM_DEFMAXNAKLOOPS              5       /* Maximum number of nak loops */

#define UPAP_DEFTIMEOUT                 6       /* Timeout (seconds) for retransmitting req */

#define UPAP_DEFREQTIME                 30      /* Time to wait for auth-req from peer */

#define CHAP_DEFTIMEOUT                 6       /* Timeout time in seconds */

#define CHAP_DEFTRANSMITS               10      /* max # times to send challenge */

/* Interval in seconds between keepalive echo requests, 0 to disable. */

#if 1

#define LCP_ECHOINTERVAL                0

#else

#define LCP_ECHOINTERVAL                10

#endif

/* Number of unanswered echo requests before failure. */

#define LCP_MAXECHOFAILS                3

/* Max Xmit idle time (in jiffies) before resend flag char. */

#define PPP_MAXIDLEFLAG                 100

/*

 * Packet sizes

 *

 * Note - lcp shouldn't be allowed to negotiate stuff outside these

 *    limits.  See lcp.h in the pppd directory.

 * (XXX - these constants should simply be shared by lcp.c instead

 *    of living in lcp.h)

 */

#define PPP_MTU                         1500     /* Default MTU (size of Info field) */

#if 0

#define PPP_MAXMTU  65535 - (PPP_HDRLEN + PPP_FCSLEN)

#else

#define PPP_MAXMTU                      1500 /* Largest MTU we allow */

#endif

#define PPP_MINMTU                      64

#define PPP_MRU                         1500     /* default MRU = max length of info field */

#define PPP_MAXMRU                      1500     /* Largest MRU we allow */

#define PPP_DEFMRU                      296             /* Try for this */

#define PPP_MINMRU                      128             /* No MRUs below this */

#define MAXNAMELEN                      256     /* max length of hostname or name for auth */

#define MAXSECRETLEN                    256     /* max length of password or secret */

#endif /* PPP_SUPPORT */

/* checksum options - set to zero for hardware checksum support */

#ifndef CHECKSUM_GEN_IP

#define CHECKSUM_GEN_IP                 1

#endif

#ifndef CHECKSUM_GEN_UDP

#define CHECKSUM_GEN_UDP                1

#endif

#ifndef CHECKSUM_GEN_TCP

#define CHECKSUM_GEN_TCP                1

#endif

#ifndef CHECKSUM_CHECK_IP

#define CHECKSUM_CHECK_IP               1

#endif

#ifndef CHECKSUM_CHECK_UDP

#define CHECKSUM_CHECK_UDP              1

#endif

#ifndef CHECKSUM_CHECK_TCP

#define CHECKSUM_CHECK_TCP              1

#endif

/* Debugging options all default to off */

#ifndef DBG_TYPES_ON

#define DBG_TYPES_ON                    0

#endif

#ifndef ETHARP_DEBUG

#define ETHARP_DEBUG                    DBG_OFF

#endif

#ifndef NETIF_DEBUG

#define NETIF_DEBUG                     DBG_OFF

#endif

#ifndef PBUF_DEBUG

#define PBUF_DEBUG                      DBG_OFF

#endif

#ifndef API_LIB_DEBUG

#define API_LIB_DEBUG                   DBG_OFF

#endif

#ifndef API_MSG_DEBUG

#define API_MSG_DEBUG                   DBG_OFF

#endif

#ifndef SOCKETS_DEBUG

#define SOCKETS_DEBUG                   DBG_OFF

#endif

#ifndef ICMP_DEBUG

#define ICMP_DEBUG                      DBG_OFF

#endif

#ifndef INET_DEBUG

#define INET_DEBUG                      DBG_OFF

#endif

#ifndef IP_DEBUG

#define IP_DEBUG                        DBG_OFF

#endif

#ifndef IP_REASS_DEBUG

#define IP_REASS_DEBUG                  DBG_OFF

#endif

#ifndef RAW_DEBUG

#define RAW_DEBUG                       DBG_OFF

#endif

#ifndef MEM_DEBUG

#define MEM_DEBUG                       DBG_OFF

#endif

#ifndef MEMP_DEBUG

#define MEMP_DEBUG                      DBG_OFF

#endif

#ifndef SYS_DEBUG

#define SYS_DEBUG                       DBG_OFF

#endif

#ifndef TCP_DEBUG

#define TCP_DEBUG                       DBG_OFF

#endif

#ifndef TCP_INPUT_DEBUG

#define TCP_INPUT_DEBUG                 DBG_OFF

#endif

#ifndef TCP_FR_DEBUG

#define TCP_FR_DEBUG                    DBG_OFF

#endif

#ifndef TCP_RTO_DEBUG

#define TCP_RTO_DEBUG                   DBG_OFF

#endif

#ifndef TCP_REXMIT_DEBUG

#define TCP_REXMIT_DEBUG                DBG_OFF

#endif

#ifndef TCP_CWND_DEBUG

#define TCP_CWND_DEBUG                  DBG_OFF

#endif

#ifndef TCP_WND_DEBUG

#define TCP_WND_DEBUG                   DBG_OFF

#endif

#ifndef TCP_OUTPUT_DEBUG

#define TCP_OUTPUT_DEBUG                DBG_OFF

#endif

#ifndef TCP_RST_DEBUG

#define TCP_RST_DEBUG                   DBG_OFF

#endif

#ifndef TCP_QLEN_DEBUG

#define TCP_QLEN_DEBUG                  DBG_OFF

#endif

#ifndef UDP_DEBUG

#define UDP_DEBUG                       DBG_OFF

#endif

#ifndef TCPIP_DEBUG

#define TCPIP_DEBUG                     DBG_OFF

#endif

#ifndef PPP_DEBUG 

#define PPP_DEBUG                       DBG_OFF

#endif

#ifndef SLIP_DEBUG 

#define SLIP_DEBUG                      DBG_OFF

#endif

#ifndef DHCP_DEBUG 

#define DHCP_DEBUG                      DBG_OFF

#endif

#ifndef DBG_MIN_LEVEL

#define DBG_MIN_LEVEL                   DBG_LEVEL_OFF

#endif

#endif /* __LWIP_OPT_H__ */