text: /*
   * 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 LWIP_DBG_MIN_LEVEL 0
  #define LWIP_COMPAT_SOCKETS 1
  #define TAPIF_DEBUG LWIP_DBG_ON
  #define TUNIF_DEBUG LWIP_DBG_OFF
  #define UNIXIF_DEBUG LWIP_DBG_OFF
  #define DELIF_DEBUG LWIP_DBG_OFF
  #define SIO_FIFO_DEBUG LWIP_DBG_OFF
  #define TCPDUMP_DEBUG LWIP_DBG_ON
  
  #define PPP_DEBUG        LWIP_DBG_OFF
  #define MEM_DEBUG        LWIP_DBG_OFF
  #define MEMP_DEBUG       LWIP_DBG_OFF
  #define PBUF_DEBUG       LWIP_DBG_OFF
  #define API_LIB_DEBUG    LWIP_DBG_ON
  #define API_MSG_DEBUG    LWIP_DBG_ON
  #define TCPIP_DEBUG      LWIP_DBG_ON
  #define NETIF_DEBUG      LWIP_DBG_ON
  #define SOCKETS_DEBUG    LWIP_DBG_ON
  #define DEMO_DEBUG       LWIP_DBG_ON
  #define IP_DEBUG         LWIP_DBG_ON
  #define IP_REASS_DEBUG   LWIP_DBG_ON
  #define RAW_DEBUG        LWIP_DBG_ON
  #define ICMP_DEBUG       LWIP_DBG_ON
  #define UDP_DEBUG        LWIP_DBG_ON
  #define TCP_DEBUG        LWIP_DBG_ON
  #define TCP_INPUT_DEBUG  LWIP_DBG_ON
  #define TCP_OUTPUT_DEBUG LWIP_DBG_ON
  #define TCP_RTO_DEBUG    LWIP_DBG_ON
  #define TCP_CWND_DEBUG   LWIP_DBG_ON
  #define TCP_WND_DEBUG    LWIP_DBG_ON
  #define TCP_FR_DEBUG     LWIP_DBG_ON
  #define TCP_QLEN_DEBUG   LWIP_DBG_ON
  #define TCP_RST_DEBUG    LWIP_DBG_ON
  
  extern unsigned char debug_flags;
  #define LWIP_DBG_TYPES_ON debug_flags
  
  #define NO_SYS                     0
  #define LWIP_SOCKET                (NO_SYS==0)
  #define LWIP_NETCONN               (NO_SYS==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. */
  /* MSVC port: intel processors don't need 4-byte alignment,
     but are faster that way! */
  #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               10240 
  
  /* 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_RAW_PCB: the number of UDP protocol control blocks. One
     per active RAW "connection". */
  #define MEMP_NUM_RAW_PCB        3
  /* 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
  /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
     timeouts. */
  #define MEMP_NUM_SYS_TIMEOUT    3
  
  /* 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         2
  /* 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
  
  /* ---------- Pbuf options ---------- */
  /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
  #define PBUF_POOL_SIZE          120
  
  /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
  #define PBUF_POOL_BUFSIZE       128
  
  /* 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                 1024
  
  /* TCP sender buffer space (bytes). */
  #define TCP_SND_BUF             2048
  
  /* 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 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)
  
  /* TCP receive window. */
  #define TCP_WND                 8096
  
  /* 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 LWIP_ARP                1
  #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              1
  
  
  /* IP reassembly and segmentation.These are orthogonal even
   * if they both deal with IP fragments */
  #define IP_REASSEMBLY     1
  #define IP_REASS_MAX_PBUFS      10
  #define MEMP_NUM_REASSDATA      10
  #define IP_FRAG           1
  
  /* ---------- ICMP options ---------- */
  #define ICMP_TTL                255
  
  /* ---------- DHCP options ---------- */
  /* Define LWIP_DHCP to 1 if you want DHCP configuration of
     interfaces. */
  #define LWIP_DHCP               0
  
  /* 1 if you want to do an ARP check on the offered address
     (recommended if using DHCP). */
  #define DHCP_DOES_ARP_CHECK     (LWIP_DHCP)
  
  /* ---------- AUTOIP options ------- */
  #define LWIP_AUTOIP             0
  
  /* ---------- SNMP options ---------- */
  /** @todo SNMP is experimental for now
      @note UDP must be available for SNMP transport */
  #ifndef LWIP_SNMP
  #define LWIP_SNMP               0
  #endif
  
  #ifndef SNMP_PRIVATE_MIB
  #define SNMP_PRIVATE_MIB        0
  #endif
  
  /* ---------- UDP options ---------- */
  #define LWIP_UDP                1
  #define UDP_TTL                 255
  
  /* ---------- RAW options ---------- */
  #define LWIP_RAW                1
  #define RAW_TTL                 255
  
  /* ---------- Statistics options ---------- */
  /* individual STATS options can be turned off by defining them to 0 
   * (e.g #define TCP_STATS 0). All of them are turned off if LWIP_STATS
   * is 0
   * */
  
  #define LWIP_STATS	1
  
  /* ---------- PPP options ---------- */
  
  #define PPP_SUPPORT      0      /* Set > 0 for PPP */
  
  #if PPP_SUPPORT > 0
  
  #define NUM_PPP 1           /* Max PPP sessions. */
  
  
  /* Select modules to enable.  Ideally these would be set in the makefile but
   * we're limited by the command line length so you need to modify the settings
   * in this file.
   */
  #define PAP_SUPPORT      1      /* Set > 0 for PAP. */
  #define CHAP_SUPPORT     1      /* Set > 0 for CHAP. */
  #define MSCHAP_SUPPORT   0      /* Set > 0 for MSCHAP (NOT FUNCTIONAL!) */
  #define CBCP_SUPPORT     0      /* Set > 0 for CBCP (NOT FUNCTIONAL!) */
  #define CCP_SUPPORT      0      /* Set > 0 for CCP (NOT FUNCTIONAL!) */
  #define VJ_SUPPORT       1      /* Set > 0 for VJ header compression. */
  #define MD5_SUPPORT      1      /* Set > 0 for MD5 (see also CHAP) */
  
  
  /*
   * 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 > 0 */
  
  #endif /* __LWIPOPTS_H__ */
  