opt.h

最新的lwip 1.3.0版本在ucos平台上的移植

/**
 * @file
 *
 * lwIP Options Configuration
 */

/*
 * 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 <[e-mail]>
 *
 */
#ifndef __LWIP_OPT_H__
#define __LWIP_OPT_H__

/*
 * Include user defined options first. Anything not defined in these files
 * will be set to standard values. Override anything you dont like!
 */
#include "lwipopts.h"
#include "lwip/debug.h"

/*
   -----------------------------------------------
   ---------- Platform specific locking ----------
   -----------------------------------------------
*/

/**
 * SYS_LIGHTWEIGHT_PROT==1: 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

/** 
 * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
 * use lwIP facilities.
 */
#ifndef NO_SYS
#define NO_SYS                          0
#endif

/**
 * MEMCPY: override this if you have a faster implementation at hand than the
 * one included in your C library
 */
#ifndef MEMCPY
#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
#endif

/**
 * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a
 * call to memcpy() if the length is known at compile time and is small.
 */
#ifndef SMEMCPY
#define SMEMCPY(dst,src,len)            memcpy(dst,src,len)
#endif

/*
   ------------------------------------
   ---------- Memory options ----------
   ------------------------------------
*/
/**
 * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library
 * instead of the lwip internal allocator. Can save code size if you
 * already use it.
 */
#ifndef MEM_LIBC_MALLOC
#define MEM_LIBC_MALLOC                 1
#endif

/**
 * MEM_ALIGNMENT: should be set to the alignment of the CPU
 *    4 byte alignment -> #define MEM_ALIGNMENT 4
 *    2 byte alignment -> #define MEM_ALIGNMENT 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

/**
 * MEMP_OVERFLOW_CHECK: memp overflow protection reserves a configurable
 * amount of bytes before and after each memp element in every pool and fills
 * it with a prominent default value.
 *    MEMP_OVERFLOW_CHECK == 0 no checking
 *    MEMP_OVERFLOW_CHECK == 1 checks each element when it is freed
 *    MEMP_OVERFLOW_CHECK >= 2 checks each element in every pool every time
 *      memp_malloc() or memp_free() is called (useful but slow!)
 */
#ifndef MEMP_OVERFLOW_CHECK
#define MEMP_OVERFLOW_CHECK             0
#endif

/**
 * MEMP_SANITY_CHECK==1: run a sanity check after each memp_free() to make
 * sure that there are no cycles in the linked lists.
 */
#ifndef MEMP_SANITY_CHECK
#define MEMP_SANITY_CHECK               0
#endif

/**
 * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set
 * of memory pools of various sizes. When mem_malloc is called, an element of
 * the smallest pool that can provide the lenght needed is returned.
 */
#ifndef MEM_USE_POOLS
#define MEM_USE_POOLS                   0
#endif

/**
 * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h
 * that defines additional pools beyond the "standard" ones required
 * by lwIP. If you set this to 1, you must have lwippools.h in your 
 * inlude path somewhere. 
 */
#ifndef MEMP_USE_CUSTOM_POOLS
#define MEMP_USE_CUSTOM_POOLS           0
#endif


/*
   ------------------------------------------------
   ---------- Internal Memory Pool Sizes ----------
   ------------------------------------------------
*/
/**
 * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
 * 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

/**
 * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
 * (requires the LWIP_RAW option)
 */
#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".
 * (requires the LWIP_UDP option)
 */
#ifndef MEMP_NUM_UDP_PCB
#define MEMP_NUM_UDP_PCB                4
#endif

/**
 * MEMP_NUM_TCP_PCB: the number of simulatenously active TCP connections.
 * (requires the LWIP_TCP option)
 */
#ifndef MEMP_NUM_TCP_PCB
#define MEMP_NUM_TCP_PCB                5
#endif

/**
 * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
 * (requires the LWIP_TCP option)
 */
#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.
 * (requires the LWIP_TCP option)
 */
#ifndef MEMP_NUM_TCP_SEG
#define MEMP_NUM_TCP_SEG                16
#endif

/**
 * MEMP_NUM_REASSDATA: the number of simultaneously IP packets queued for
 * reassembly (whole packets, not fragments!)
 */
#ifndef MEMP_NUM_REASSDATA
#define MEMP_NUM_REASSDATA              5
#endif

/**
 * MEMP_NUM_ARP_QUEUE: the number of simulateously queued outgoing
 * packets (pbufs) that are waiting for an ARP request (to resolve
 * their destination address) to finish.
 * (requires the ARP_QUEUEING option)
 */
#ifndef MEMP_NUM_ARP_QUEUE
#define MEMP_NUM_ARP_QUEUE              30
#endif

/**
 * MEMP_NUM_IGMP_GROUP: The number of multicast groups whose network interfaces
 * can be members et the same time (one per netif - allsystems group -, plus one
 * per netif membership).
 * (requires the LWIP_IGMP option)
 */
#ifndef MEMP_NUM_IGMP_GROUP
#define MEMP_NUM_IGMP_GROUP             8
#endif

/**
 * MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts.
 * (requires NO_SYS==0)
 */
#ifndef MEMP_NUM_SYS_TIMEOUT
#define MEMP_NUM_SYS_TIMEOUT            3
#endif

/**
 * MEMP_NUM_NETBUF: the number of struct netbufs.
 * (only needed if you use the sequential API, like api_lib.c)
 */
#ifndef MEMP_NUM_NETBUF
#define MEMP_NUM_NETBUF                 2
#endif

/**
 * MEMP_NUM_NETCONN: the number of struct netconns.
 * (only needed if you use the sequential API, like api_lib.c)
 */
#ifndef MEMP_NUM_NETCONN
#define MEMP_NUM_NETCONN                16
#endif

/**
 * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used
 * for callback/timeout API communication. 
 * (only needed if you use tcpip.c)
 */
#ifndef MEMP_NUM_TCPIP_MSG_API
#define MEMP_NUM_TCPIP_MSG_API          8
#endif

/**
 * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used
 * for incoming packets. 
 * (only needed if you use tcpip.c)
 */
#ifndef MEMP_NUM_TCPIP_MSG_INPKT
#define MEMP_NUM_TCPIP_MSG_INPKT        32
#endif

/**
 * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. 
 */
#ifndef PBUF_POOL_SIZE
#define PBUF_POOL_SIZE                  16
#endif

/*
   ---------------------------------
   ---------- ARP options ----------
   ---------------------------------
*/
/**
 * LWIP_ARP==1: Enable ARP functionality.
 */
#ifndef LWIP_ARP
#define LWIP_ARP                        1
#endif

/**
 * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached.
 */
#ifndef ARP_TABLE_SIZE
#define ARP_TABLE_SIZE                  10
#endif

/**
 * ARP_QUEUEING==1: Outgoing packets are queued during hardware address
 * resolution.
 */
#ifndef ARP_QUEUEING
#define ARP_QUEUEING                    1
#endif

/**
 * ETHARP_TRUST_IP_MAC==1: Incoming IP packets cause the ARP table to be
 * updated with the source MAC and IP addresses supplied in the packet.
 * You may want to disable this if you do not trust LAN peers to have the
 * correct addresses, or as a limited approach to attempt to handle
 * spoofing. If disabled, lwIP will need to make a new ARP request if
 * the peer is not already in the ARP table, adding a little latency.
 */
#ifndef ETHARP_TRUST_IP_MAC
#define ETHARP_TRUST_IP_MAC             1
#endif

/*
   --------------------------------
   ---------- IP options ----------
   --------------------------------
*/
/**
 * IP_FORWARD==1: Enables 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

/**
 * IP_OPTIONS_ALLOWED: Defines the behavior for IP options.
 *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
 *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
 */
#ifndef IP_OPTIONS_ALLOWED
#define IP_OPTIONS_ALLOWED              1
#endif

/**
 * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
 * this option does not affect outgoing packet sizes, which can be controlled
 * via IP_FRAG.
 */
#ifndef IP_REASSEMBLY
#define IP_REASSEMBLY                   1
#endif

/**
 * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
 * that this option does not affect incoming packet sizes, which can be
 * controlled via IP_REASSEMBLY.
 */
#ifndef IP_FRAG
#define IP_FRAG                         1
#endif

/**
 * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
 * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
 * in this time, the whole packet is discarded.
 */
#ifndef IP_REASS_MAXAGE
#define IP_REASS_MAXAGE                 3
#endif

/**
 * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
 * Since the received pbufs are enqueued, be sure to configure
 * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
 * packets even if the maximum amount of fragments is enqueued for reassembly!
 */
#ifndef IP_REASS_MAX_PBUFS
#define IP_REASS_MAX_PBUFS              10
#endif

/**
 * IP_FRAG_USES_STATIC_BUF==1: Use a static MTU-sized buffer for IP
 * fragmentation. Otherwise pbufs are allocated and reference the original
 * packet data to be fragmented.
 */
#ifndef IP_FRAG_USES_STATIC_BUF
#define IP_FRAG_USES_STATIC_BUF         1
#endif

/**
 * IP_FRAG_MAX_MTU: Assumed max MTU on any interface for IP frag buffer
 * (requires IP_FRAG_USES_STATIC_BUF==1)
 */
#if IP_FRAG_USES_STATIC_BUF && !defined(IP_FRAG_MAX_MTU)
#define IP_FRAG_MAX_MTU                 1500
#endif

/**
 * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers.
 */
#ifndef IP_DEFAULT_TTL
#define IP_DEFAULT_TTL                  255
#endif

/*
   ----------------------------------
   ---------- ICMP options ----------
   ----------------------------------
*/
/**
 * LWIP_ICMP==1: Enable ICMP module inside the IP stack.
 * Be careful, disable that make your product non-compliant to RFC1122
 */
#ifndef LWIP_ICMP
#define LWIP_ICMP                       1
#endif

/**
 * ICMP_TTL: Default value for Time-To-Live used by ICMP packets.
 */
#ifndef ICMP_TTL
#define ICMP_TTL                       (IP_DEFAULT_TTL)
#endif

/*
   ---------------------------------
   ---------- RAW options ----------
   ---------------------------------
*/
/**
 * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
 */
#ifndef LWIP_RAW
#define LWIP_RAW                        1
#endif

/**
 * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
 */
#ifndef RAW_TTL
#define RAW_TTL                        (IP_DEFAULT_TTL)
#endif

/*
   ----------------------------------
   ---------- DHCP options ----------
   ----------------------------------
*/
/**
 * LWIP_DHCP==1: Enable DHCP module.
 */
#ifndef LWIP_DHCP
#define LWIP_DHCP                       0
#endif

/**
 * DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address.
 */
#ifndef DHCP_DOES_ARP_CHECK
#define DHCP_DOES_ARP_CHECK             ((LWIP_DHCP) && (LWIP_ARP))
#endif

/*
   ------------------------------------
   ---------- AUTOIP options ----------
   ------------------------------------
*/
/**
 * LWIP_AUTOIP==1: Enable AUTOIP module.
 */
#ifndef LWIP_AUTOIP
#define LWIP_AUTOIP                     0
#endif

/**
 * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on
 * the same interface at the same time.
 */
#ifndef LWIP_DHCP_AUTOIP_COOP
#define LWIP_DHCP_AUTOIP_COOP           0
#endif

/*
   ----------------------------------
   ---------- SNMP options ----------
   ----------------------------------
*/
/**
 * LWIP_SNMP==1: Turn on SNMP module. UDP must be available for SNMP
 * transport.
 */
#ifndef LWIP_SNMP
#define LWIP_SNMP                       0
#endif

/**
 * SNMP_CONCURRENT_REQUESTS: Number of concurrent requests the module will
 * allow. At least one request buffer is required. 
 */
#ifndef SNMP_CONCURRENT_REQUESTS
#define SNMP_CONCURRENT_REQUESTS        1
#endif

/**
 * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
 * destination is required
 */
#ifndef SNMP_TRAP_DESTINATIONS
#define SNMP_TRAP_DESTINATIONS          1
#endif

/**
 * SNMP_PRIVATE_MIB: 
 */
#ifndef SNMP_PRIVATE_MIB
#define SNMP_PRIVATE_MIB                0
#endif

/**
 * Only allow SNMP write actions that are 'safe' (e.g. disabeling netifs is not
 * a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
 * Unsafe requests are disabled by default!
 */
#ifndef SNMP_SAFE_REQUESTS
#define SNMP_SAFE_REQUESTS              1
#endif

/*
   ----------------------------------
   ---------- IGMP options ----------
   ----------------------------------
*/
/**
 * LWIP_IGMP==1: Turn on IGMP module. 
 */
#ifndef LWIP_IGMP
#define LWIP_IGMP                       0
#endif

/*
   ----------------------------------
   ---------- DNS options -----------
   ----------------------------------